drivers/net/wireless/iwlwifi/iwl4965-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-4965.h"
  49 #include "iwl-helpers.h"
  50
  51 #ifdef CONFIG_IWL4965_DEBUG
  52 u32 iwl4965_debug_level;
  53 #endif
  54
  55 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
  56                                   struct iwl4965_tx_queue *txq);
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /* module parameters */
  65 static int iwl4965_param_disable_hw_scan; /* def: 0 = use 4965's h/w scan */
  66 static int iwl4965_param_debug;    /* def: 0 = minimal debug log messages */
  67 static int iwl4965_param_disable;  /* def: enable radio */
  68 static int iwl4965_param_antenna;  /* def: 0 = both antennas (use diversity) */
  69 int iwl4965_param_hwcrypto;        /* def: using software encryption */
  70 static int iwl4965_param_qos_enable = 1; /* def: 1 = use quality of service */
  71 int iwl4965_param_queues_num = IWL_MAX_NUM_QUEUES; /* def: 16 Tx queues */
  72 int iwl4965_param_amsdu_size_8K;   /* def: enable 8K amsdu size */
  73
  74 /*
  75  * module name, copyright, version, etc.
  76  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  77  */
  78
  79 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  80
  81 #ifdef CONFIG_IWL4965_DEBUG
  82 #define VD "d"
  83 #else
  84 #define VD
  85 #endif
  86
  87 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  88 #define VS "s"
  89 #else
  90 #define VS
  91 #endif
  92
  93 #define IWLWIFI_VERSION "1.2.26k" VD VS
  94 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
  95 #define DRV_VERSION     IWLWIFI_VERSION
  96
  97 /* Change firmware file name, using "-" and incrementing number,
  98  *   *only* when uCode interface or architecture changes so that it
  99  *   is not compatible with earlier drivers.
 100  * This number will also appear in << 8 position of 1st dword of uCode file */
 101 #define IWL4965_UCODE_API "-1"
 102
 103 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 104 MODULE_VERSION(DRV_VERSION);
 105 MODULE_AUTHOR(DRV_COPYRIGHT);
 106 MODULE_LICENSE("GPL");
 107
 108 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 109 {
 110         u16 fc = le16_to_cpu(hdr->frame_control);
 111         int hdr_len = ieee80211_get_hdrlen(fc);
 112
 113         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 114                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 115         return NULL;
 116 }
 117
 118 static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
 119                 struct iwl4965_priv *priv, enum ieee80211_band band)
 120 {
 121         return priv->hw->wiphy->bands[band];
 122 }
 123
 124 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 125 {
 126         /* Single white space is for Linksys APs */
 127         if (essid_len == 1 && essid[0] == ' ')
 128                 return 1;
 129
 130         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 131         while (essid_len) {
 132                 essid_len--;
 133                 if (essid[essid_len] != '\0')
 134                         return 0;
 135         }
 136
 137         return 1;
 138 }
 139
 140 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 141 {
 142         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 143         const char *s = essid;
 144         char *d = escaped;
 145
 146         if (iwl4965_is_empty_essid(essid, essid_len)) {
 147                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 148                 return escaped;
 149         }
 150
 151         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 152         while (essid_len--) {
 153                 if (*s == '\0') {
 154                         *d++ = '\\';
 155                         *d++ = '0';
 156                         s++;
 157                 } else
 158                         *d++ = *s++;
 159         }
 160         *d = '\0';
 161         return escaped;
 162 }
 163
 164 static void iwl4965_print_hex_dump(int level, void *p, u32 len)
 165 {
 166 #ifdef CONFIG_IWL4965_DEBUG
 167         if (!(iwl4965_debug_level & level))
 168                 return;
 169
 170         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 171                         p, len, 1);
 172 #endif
 173 }
 174
 175 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 176  * DMA services
 177  *
 178  * Theory of operation
 179  *
 180  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 181  * of buffer descriptors, each of which points to one or more data buffers for
 182  * the device to read from or fill.  Driver and device exchange status of each
 183  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 184  * entries in each circular buffer, to protect against confusing empty and full
 185  * queue states.
 186  *
 187  * The device reads or writes the data in the queues via the device's several
 188  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 189  *
 190  * For Tx queue, there are low mark and high mark limits. If, after queuing
 191  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 192  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 193  * Tx queue resumed.
 194  *
 195  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 196  * queue (#4) for sending commands to the device firmware, and 15 other
 197  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 198  *
 199  * See more detailed info in iwl-4965-hw.h.
 200  ***************************************************/
 201
 202 int iwl4965_queue_space(const struct iwl4965_queue *q)
 203 {
 204         int s = q->read_ptr - q->write_ptr;
 205
 206         if (q->read_ptr > q->write_ptr)
 207                 s -= q->n_bd;
 208
 209         if (s <= 0)
 210                 s += q->n_window;
 211         /* keep some reserve to not confuse empty and full situations */
 212         s -= 2;
 213         if (s < 0)
 214                 s = 0;
 215         return s;
 216 }
 217
 218 /**
 219  * iwl4965_queue_inc_wrap - increment queue index, wrap back to beginning
 220  * @index -- current index
 221  * @n_bd -- total number of entries in queue (must be power of 2)
 222  */
 223 static inline int iwl4965_queue_inc_wrap(int index, int n_bd)
 224 {
 225         return ++index & (n_bd - 1);
 226 }
 227
 228 /**
 229  * iwl4965_queue_dec_wrap - decrement queue index, wrap back to end
 230  * @index -- current index
 231  * @n_bd -- total number of entries in queue (must be power of 2)
 232  */
 233 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
 234 {
 235         return --index & (n_bd - 1);
 236 }
 237
 238 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 239 {
 240         return q->write_ptr > q->read_ptr ?
 241                 (i >= q->read_ptr && i < q->write_ptr) :
 242                 !(i < q->read_ptr && i >= q->write_ptr);
 243 }
 244
 245 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 246 {
 247         /* This is for scan command, the big buffer at end of command array */
 248         if (is_huge)
 249                 return q->n_window;     /* must be power of 2 */
 250
 251         /* Otherwise, use normal size buffers */
 252         return index & (q->n_window - 1);
 253 }
 254
 255 /**
 256  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 257  */
 258 static int iwl4965_queue_init(struct iwl4965_priv *priv, struct iwl4965_queue *q,
 259                           int count, int slots_num, u32 id)
 260 {
 261         q->n_bd = count;
 262         q->n_window = slots_num;
 263         q->id = id;
 264
 265         /* count must be power-of-two size, otherwise iwl4965_queue_inc_wrap
 266          * and iwl4965_queue_dec_wrap are broken. */
 267         BUG_ON(!is_power_of_2(count));
 268
 269         /* slots_num must be power-of-two size, otherwise
 270          * get_cmd_index is broken. */
 271         BUG_ON(!is_power_of_2(slots_num));
 272
 273         q->low_mark = q->n_window / 4;
 274         if (q->low_mark < 4)
 275                 q->low_mark = 4;
 276
 277         q->high_mark = q->n_window / 8;
 278         if (q->high_mark < 2)
 279                 q->high_mark = 2;
 280
 281         q->write_ptr = q->read_ptr = 0;
 282
 283         return 0;
 284 }
 285
 286 /**
 287  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 288  */
 289 static int iwl4965_tx_queue_alloc(struct iwl4965_priv *priv,
 290                               struct iwl4965_tx_queue *txq, u32 id)
 291 {
 292         struct pci_dev *dev = priv->pci_dev;
 293
 294         /* Driver private data, only for Tx (not command) queues,
 295          * not shared with device. */
 296         if (id != IWL_CMD_QUEUE_NUM) {
 297                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 298                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 299                 if (!txq->txb) {
 300                         IWL_ERROR("kmalloc for auxiliary BD "
 301                                   "structures failed\n");
 302                         goto error;
 303                 }
 304         } else
 305                 txq->txb = NULL;
 306
 307         /* Circular buffer of transmit frame descriptors (TFDs),
 308          * shared with device */
 309         txq->bd = pci_alloc_consistent(dev,
 310                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 311                         &txq->q.dma_addr);
 312
 313         if (!txq->bd) {
 314                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 315                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 316                 goto error;
 317         }
 318         txq->q.id = id;
 319
 320         return 0;
 321
 322  error:
 323         if (txq->txb) {
 324                 kfree(txq->txb);
 325                 txq->txb = NULL;
 326         }
 327
 328         return -ENOMEM;
 329 }
 330
 331 /**
 332  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 333  */
 334 int iwl4965_tx_queue_init(struct iwl4965_priv *priv,
 335                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 336 {
 337         struct pci_dev *dev = priv->pci_dev;
 338         int len;
 339         int rc = 0;
 340
 341         /*
 342          * Alloc buffer array for commands (Tx or other types of commands).
 343          * For the command queue (#4), allocate command space + one big
 344          * command for scan, since scan command is very huge; the system will
 345          * not have two scans at the same time, so only one is needed.
 346          * For normal Tx queues (all other queues), no super-size command
 347          * space is needed.
 348          */
 349         len = sizeof(struct iwl4965_cmd) * slots_num;
 350         if (txq_id == IWL_CMD_QUEUE_NUM)
 351                 len +=  IWL_MAX_SCAN_SIZE;
 352         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 353         if (!txq->cmd)
 354                 return -ENOMEM;
 355
 356         /* Alloc driver data array and TFD circular buffer */
 357         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 358         if (rc) {
 359                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 360
 361                 return -ENOMEM;
 362         }
 363         txq->need_update = 0;
 364
 365         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 366          * iwl4965_queue_inc_wrap and iwl4965_queue_dec_wrap are broken. */
 367         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 368
 369         /* Initialize queue's high/low-water marks, and head/tail indexes */
 370         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 371
 372         /* Tell device where to find queue */
 373         iwl4965_hw_tx_queue_init(priv, txq);
 374
 375         return 0;
 376 }
 377
 378 /**
 379  * iwl4965_tx_queue_free - Deallocate DMA queue.
 380  * @txq: Transmit queue to deallocate.
 381  *
 382  * Empty queue by removing and destroying all BD's.
 383  * Free all buffers.
 384  * 0-fill, but do not free "txq" descriptor structure.
 385  */
 386 void iwl4965_tx_queue_free(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
 387 {
 388         struct iwl4965_queue *q = &txq->q;
 389         struct pci_dev *dev = priv->pci_dev;
 390         int len;
 391
 392         if (q->n_bd == 0)
 393                 return;
 394
 395         /* first, empty all BD's */
 396         for (; q->write_ptr != q->read_ptr;
 397              q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd))
 398                 iwl4965_hw_txq_free_tfd(priv, txq);
 399
 400         len = sizeof(struct iwl4965_cmd) * q->n_window;
 401         if (q->id == IWL_CMD_QUEUE_NUM)
 402                 len += IWL_MAX_SCAN_SIZE;
 403
 404         /* De-alloc array of command/tx buffers */
 405         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 406
 407         /* De-alloc circular buffer of TFDs */
 408         if (txq->q.n_bd)
 409                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 410                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 411
 412         /* De-alloc array of per-TFD driver data */
 413         if (txq->txb) {
 414                 kfree(txq->txb);
 415                 txq->txb = NULL;
 416         }
 417
 418         /* 0-fill queue descriptor structure */
 419         memset(txq, 0, sizeof(*txq));
 420 }
 421
 422 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 423
 424 /*************** STATION TABLE MANAGEMENT ****
 425  * mac80211 should be examined to determine if sta_info is duplicating
 426  * the functionality provided here
 427  */
 428
 429 /**************************************************************/
 430
 431 #if 0 /* temporary disable till we add real remove station */
 432 /**
 433  * iwl4965_remove_station - Remove driver's knowledge of station.
 434  *
 435  * NOTE:  This does not remove station from device's station table.
 436  */
 437 static u8 iwl4965_remove_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
 438 {
 439         int index = IWL_INVALID_STATION;
 440         int i;
 441         unsigned long flags;
 442
 443         spin_lock_irqsave(&priv->sta_lock, flags);
 444
 445         if (is_ap)
 446                 index = IWL_AP_ID;
 447         else if (is_broadcast_ether_addr(addr))
 448                 index = priv->hw_setting.bcast_sta_id;
 449         else
 450                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 451                         if (priv->stations[i].used &&
 452                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 453                                                 addr)) {
 454                                 index = i;
 455                                 break;
 456                         }
 457
 458         if (unlikely(index == IWL_INVALID_STATION))
 459                 goto out;
 460
 461         if (priv->stations[index].used) {
 462                 priv->stations[index].used = 0;
 463                 priv->num_stations--;
 464         }
 465
 466         BUG_ON(priv->num_stations < 0);
 467
 468 out:
 469         spin_unlock_irqrestore(&priv->sta_lock, flags);
 470         return 0;
 471 }
 472 #endif
 473
 474 /**
 475  * iwl4965_clear_stations_table - Clear the driver's station table
 476  *
 477  * NOTE:  This does not clear or otherwise alter the device's station table.
 478  */
 479 static void iwl4965_clear_stations_table(struct iwl4965_priv *priv)
 480 {
 481         unsigned long flags;
 482
 483         spin_lock_irqsave(&priv->sta_lock, flags);
 484
 485         priv->num_stations = 0;
 486         memset(priv->stations, 0, sizeof(priv->stations));
 487
 488         spin_unlock_irqrestore(&priv->sta_lock, flags);
 489 }
 490
 491 /**
 492  * iwl4965_add_station_flags - Add station to tables in driver and device
 493  */
 494 u8 iwl4965_add_station_flags(struct iwl4965_priv *priv, const u8 *addr,
 495                                 int is_ap, u8 flags, void *ht_data)
 496 {
 497         int i;
 498         int index = IWL_INVALID_STATION;
 499         struct iwl4965_station_entry *station;
 500         unsigned long flags_spin;
 501         DECLARE_MAC_BUF(mac);
 502
 503         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 504         if (is_ap)
 505                 index = IWL_AP_ID;
 506         else if (is_broadcast_ether_addr(addr))
 507                 index = priv->hw_setting.bcast_sta_id;
 508         else
 509                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 510                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 511                                                 addr)) {
 512                                 index = i;
 513                                 break;
 514                         }
 515
 516                         if (!priv->stations[i].used &&
 517                             index == IWL_INVALID_STATION)
 518                                 index = i;
 519                 }
 520
 521
 522         /* These two conditions have the same outcome, but keep them separate
 523           since they have different meanings */
 524         if (unlikely(index == IWL_INVALID_STATION)) {
 525                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 526                 return index;
 527         }
 528
 529         if (priv->stations[index].used &&
 530             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 531                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 532                 return index;
 533         }
 534
 535
 536         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 537         station = &priv->stations[index];
 538         station->used = 1;
 539         priv->num_stations++;
 540
 541         /* Set up the REPLY_ADD_STA command to send to device */
 542         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 543         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 544         station->sta.mode = 0;
 545         station->sta.sta.sta_id = index;
 546         station->sta.station_flags = 0;
 547
 548 #ifdef CONFIG_IWL4965_HT
 549         /* BCAST station and IBSS stations do not work in HT mode */
 550         if (index != priv->hw_setting.bcast_sta_id &&
 551             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 552                 iwl4965_set_ht_add_station(priv, index,
 553                                  (struct ieee80211_ht_info *) ht_data);
 554 #endif /*CONFIG_IWL4965_HT*/
 555
 556         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 557
 558         /* Add station to device's station table */
 559         iwl4965_send_add_station(priv, &station->sta, flags);
 560         return index;
 561
 562 }
 563
 564 /*************** DRIVER STATUS FUNCTIONS   *****/
 565
 566 static inline int iwl4965_is_ready(struct iwl4965_priv *priv)
 567 {
 568         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 569          * set but EXIT_PENDING is not */
 570         return test_bit(STATUS_READY, &priv->status) &&
 571                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 572                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 573 }
 574
 575 static inline int iwl4965_is_alive(struct iwl4965_priv *priv)
 576 {
 577         return test_bit(STATUS_ALIVE, &priv->status);
 578 }
 579
 580 static inline int iwl4965_is_init(struct iwl4965_priv *priv)
 581 {
 582         return test_bit(STATUS_INIT, &priv->status);
 583 }
 584
 585 static inline int iwl4965_is_rfkill(struct iwl4965_priv *priv)
 586 {
 587         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 588                test_bit(STATUS_RF_KILL_SW, &priv->status);
 589 }
 590
 591 static inline int iwl4965_is_ready_rf(struct iwl4965_priv *priv)
 592 {
 593
 594         if (iwl4965_is_rfkill(priv))
 595                 return 0;
 596
 597         return iwl4965_is_ready(priv);
 598 }
 599
 600 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 601
 602 #define IWL_CMD(x) case x : return #x
 603
 604 static const char *get_cmd_string(u8 cmd)
 605 {
 606         switch (cmd) {
 607                 IWL_CMD(REPLY_ALIVE);
 608                 IWL_CMD(REPLY_ERROR);
 609                 IWL_CMD(REPLY_RXON);
 610                 IWL_CMD(REPLY_RXON_ASSOC);
 611                 IWL_CMD(REPLY_QOS_PARAM);
 612                 IWL_CMD(REPLY_RXON_TIMING);
 613                 IWL_CMD(REPLY_ADD_STA);
 614                 IWL_CMD(REPLY_REMOVE_STA);
 615                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 616                 IWL_CMD(REPLY_TX);
 617                 IWL_CMD(REPLY_RATE_SCALE);
 618                 IWL_CMD(REPLY_LEDS_CMD);
 619                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 620                 IWL_CMD(RADAR_NOTIFICATION);
 621                 IWL_CMD(REPLY_QUIET_CMD);
 622                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 623                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 624                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 625                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 626                 IWL_CMD(POWER_TABLE_CMD);
 627                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 628                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 629                 IWL_CMD(REPLY_SCAN_CMD);
 630                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 631                 IWL_CMD(SCAN_START_NOTIFICATION);
 632                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 633                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 634                 IWL_CMD(BEACON_NOTIFICATION);
 635                 IWL_CMD(REPLY_TX_BEACON);
 636                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 637                 IWL_CMD(QUIET_NOTIFICATION);
 638                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 639                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 640                 IWL_CMD(REPLY_BT_CONFIG);
 641                 IWL_CMD(REPLY_STATISTICS_CMD);
 642                 IWL_CMD(STATISTICS_NOTIFICATION);
 643                 IWL_CMD(REPLY_CARD_STATE_CMD);
 644                 IWL_CMD(CARD_STATE_NOTIFICATION);
 645                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 646                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 647                 IWL_CMD(SENSITIVITY_CMD);
 648                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 649                 IWL_CMD(REPLY_RX_PHY_CMD);
 650                 IWL_CMD(REPLY_RX_MPDU_CMD);
 651                 IWL_CMD(REPLY_4965_RX);
 652                 IWL_CMD(REPLY_COMPRESSED_BA);
 653         default:
 654                 return "UNKNOWN";
 655
 656         }
 657 }
 658
 659 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 660
 661 /**
 662  * iwl4965_enqueue_hcmd - enqueue a uCode command
 663  * @priv: device private data point
 664  * @cmd: a point to the ucode command structure
 665  *
 666  * The function returns < 0 values to indicate the operation is
 667  * failed. On success, it turns the index (> 0) of command in the
 668  * command queue.
 669  */
 670 static int iwl4965_enqueue_hcmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 671 {
 672         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 673         struct iwl4965_queue *q = &txq->q;
 674         struct iwl4965_tfd_frame *tfd;
 675         u32 *control_flags;
 676         struct iwl4965_cmd *out_cmd;
 677         u32 idx;
 678         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 679         dma_addr_t phys_addr;
 680         int ret;
 681         unsigned long flags;
 682
 683         /* If any of the command structures end up being larger than
 684          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 685          * we will need to increase the size of the TFD entries */
 686         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 687                !(cmd->meta.flags & CMD_SIZE_HUGE));
 688
 689         if (iwl4965_is_rfkill(priv)) {
 690                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 691                 return -EIO;
 692         }
 693
 694         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 695                 IWL_ERROR("No space for Tx\n");
 696                 return -ENOSPC;
 697         }
 698
 699         spin_lock_irqsave(&priv->hcmd_lock, flags);
 700
 701         tfd = &txq->bd[q->write_ptr];
 702         memset(tfd, 0, sizeof(*tfd));
 703
 704         control_flags = (u32 *) tfd;
 705
 706         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 707         out_cmd = &txq->cmd[idx];
 708
 709         out_cmd->hdr.cmd = cmd->id;
 710         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 711         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 712
 713         /* At this point, the out_cmd now has all of the incoming cmd
 714          * information */
 715
 716         out_cmd->hdr.flags = 0;
 717         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 718                         INDEX_TO_SEQ(q->write_ptr));
 719         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 720                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 721
 722         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 723                         offsetof(struct iwl4965_cmd, hdr);
 724         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 725
 726         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 727                      "%d bytes at %d[%d]:%d\n",
 728                      get_cmd_string(out_cmd->hdr.cmd),
 729                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 730                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 731
 732         txq->need_update = 1;
 733
 734         /* Set up entry in queue's byte count circular buffer */
 735         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 736
 737         /* Increment and update queue's write index */
 738         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
 739         iwl4965_tx_queue_update_write_ptr(priv, txq);
 740
 741         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 742         return ret ? ret : idx;
 743 }
 744
 745 static int iwl4965_send_cmd_async(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 746 {
 747         int ret;
 748
 749         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 750
 751         /* An asynchronous command can not expect an SKB to be set. */
 752         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 753
 754         /* An asynchronous command MUST have a callback. */
 755         BUG_ON(!cmd->meta.u.callback);
 756
 757         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 758                 return -EBUSY;
 759
 760         ret = iwl4965_enqueue_hcmd(priv, cmd);
 761         if (ret < 0) {
 762                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 763                           get_cmd_string(cmd->id), ret);
 764                 return ret;
 765         }
 766         return 0;
 767 }
 768
 769 static int iwl4965_send_cmd_sync(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 770 {
 771         int cmd_idx;
 772         int ret;
 773         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 774
 775         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 776
 777          /* A synchronous command can not have a callback set. */
 778         BUG_ON(cmd->meta.u.callback != NULL);
 779
 780         if (atomic_xchg(&entry, 1)) {
 781                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 782                           get_cmd_string(cmd->id));
 783                 return -EBUSY;
 784         }
 785
 786         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 787
 788         if (cmd->meta.flags & CMD_WANT_SKB)
 789                 cmd->meta.source = &cmd->meta;
 790
 791         cmd_idx = iwl4965_enqueue_hcmd(priv, cmd);
 792         if (cmd_idx < 0) {
 793                 ret = cmd_idx;
 794                 IWL_ERROR("Error sending %s: iwl4965_enqueue_hcmd failed: %d\n",
 795                           get_cmd_string(cmd->id), ret);
 796                 goto out;
 797         }
 798
 799         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 800                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 801                         HOST_COMPLETE_TIMEOUT);
 802         if (!ret) {
 803                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 804                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 805                                   get_cmd_string(cmd->id),
 806                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 807
 808                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 809                         ret = -ETIMEDOUT;
 810                         goto cancel;
 811                 }
 812         }
 813
 814         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 815                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 816                                get_cmd_string(cmd->id));
 817                 ret = -ECANCELED;
 818                 goto fail;
 819         }
 820         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 821                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 822                                get_cmd_string(cmd->id));
 823                 ret = -EIO;
 824                 goto fail;
 825         }
 826         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 827                 IWL_ERROR("Error: Response NULL in '%s'\n",
 828                           get_cmd_string(cmd->id));
 829                 ret = -EIO;
 830                 goto out;
 831         }
 832
 833         ret = 0;
 834         goto out;
 835
 836 cancel:
 837         if (cmd->meta.flags & CMD_WANT_SKB) {
 838                 struct iwl4965_cmd *qcmd;
 839
 840                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 841                  * TX cmd queue. Otherwise in case the cmd comes
 842                  * in later, it will possibly set an invalid
 843                  * address (cmd->meta.source). */
 844                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 845                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 846         }
 847 fail:
 848         if (cmd->meta.u.skb) {
 849                 dev_kfree_skb_any(cmd->meta.u.skb);
 850                 cmd->meta.u.skb = NULL;
 851         }
 852 out:
 853         atomic_set(&entry, 0);
 854         return ret;
 855 }
 856
 857 int iwl4965_send_cmd(struct iwl4965_priv *priv, struct iwl4965_host_cmd *cmd)
 858 {
 859         if (cmd->meta.flags & CMD_ASYNC)
 860                 return iwl4965_send_cmd_async(priv, cmd);
 861
 862         return iwl4965_send_cmd_sync(priv, cmd);
 863 }
 864
 865 int iwl4965_send_cmd_pdu(struct iwl4965_priv *priv, u8 id, u16 len, const void *data)
 866 {
 867         struct iwl4965_host_cmd cmd = {
 868                 .id = id,
 869                 .len = len,
 870                 .data = data,
 871         };
 872
 873         return iwl4965_send_cmd_sync(priv, &cmd);
 874 }
 875
 876 static int __must_check iwl4965_send_cmd_u32(struct iwl4965_priv *priv, u8 id, u32 val)
 877 {
 878         struct iwl4965_host_cmd cmd = {
 879                 .id = id,
 880                 .len = sizeof(val),
 881                 .data = &val,
 882         };
 883
 884         return iwl4965_send_cmd_sync(priv, &cmd);
 885 }
 886
 887 int iwl4965_send_statistics_request(struct iwl4965_priv *priv)
 888 {
 889         return iwl4965_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 890 }
 891
 892 /**
 893  * iwl4965_rxon_add_station - add station into station table.
 894  *
 895  * there is only one AP station with id= IWL_AP_ID
 896  * NOTE: mutex must be held before calling this fnction
 897  */
 898 static int iwl4965_rxon_add_station(struct iwl4965_priv *priv,
 899                                 const u8 *addr, int is_ap)
 900 {
 901         u8 sta_id;
 902
 903         /* Add station to device's station table */
 904 #ifdef CONFIG_IWL4965_HT
 905         struct ieee80211_conf *conf = &priv->hw->conf;
 906         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 907
 908         if ((is_ap) &&
 909             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 910             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 911                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 912                                                    0, cur_ht_config);
 913         else
 914 #endif /* CONFIG_IWL4965_HT */
 915                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 916                                                    0, NULL);
 917
 918         /* Set up default rate scaling table in device's station table */
 919         iwl4965_add_station(priv, addr, is_ap);
 920
 921         return sta_id;
 922 }
 923
 924 /**
 925  * iwl4965_set_rxon_channel - Set the phymode and channel values in staging RXON
 926  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 927  * @channel: Any channel valid for the requested phymode
 928
 929  * In addition to setting the staging RXON, priv->phymode is also set.
 930  *
 931  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 932  * in the staging RXON flag structure based on the phymode
 933  */
 934 static int iwl4965_set_rxon_channel(struct iwl4965_priv *priv,
 935                                     enum ieee80211_band band,
 936                                  u16 channel)
 937 {
 938         if (!iwl4965_get_channel_info(priv, band, channel)) {
 939                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 940                                channel, band);
 941                 return -EINVAL;
 942         }
 943
 944         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 945             (priv->band == band))
 946                 return 0;
 947
 948         priv->staging_rxon.channel = cpu_to_le16(channel);
 949         if (band == IEEE80211_BAND_5GHZ)
 950                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 951         else
 952                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 953
 954         priv->band = band;
 955
 956         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 957
 958         return 0;
 959 }
 960
 961 /**
 962  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 963  *
 964  * NOTE:  This is really only useful during development and can eventually
 965  * be #ifdef'd out once the driver is stable and folks aren't actively
 966  * making changes
 967  */
 968 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 969 {
 970         int error = 0;
 971         int counter = 1;
 972
 973         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 974                 error |= le32_to_cpu(rxon->flags &
 975                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 976                                  RXON_FLG_RADAR_DETECT_MSK));
 977                 if (error)
 978                         IWL_WARNING("check 24G fields %d | %d\n",
 979                                     counter++, error);
 980         } else {
 981                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 982                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 983                 if (error)
 984                         IWL_WARNING("check 52 fields %d | %d\n",
 985                                     counter++, error);
 986                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 987                 if (error)
 988                         IWL_WARNING("check 52 CCK %d | %d\n",
 989                                     counter++, error);
 990         }
 991         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 992         if (error)
 993                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 994
 995         /* make sure basic rates 6Mbps and 1Mbps are supported */
 996         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 997                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 998         if (error)
 999                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
1000
1001         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
1002         if (error)
1003                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
1004
1005         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
1006                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
1007         if (error)
1008                 IWL_WARNING("check CCK and short slot %d | %d\n",
1009                             counter++, error);
1010
1011         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
1012                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
1013         if (error)
1014                 IWL_WARNING("check CCK & auto detect %d | %d\n",
1015                             counter++, error);
1016
1017         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
1018                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
1019         if (error)
1020                 IWL_WARNING("check TGG and auto detect %d | %d\n",
1021                             counter++, error);
1022
1023         if (error)
1024                 IWL_WARNING("Tuning to channel %d\n",
1025                             le16_to_cpu(rxon->channel));
1026
1027         if (error) {
1028                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
1029                 return -1;
1030         }
1031         return 0;
1032 }
1033
1034 /**
1035  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
1036  * @priv: staging_rxon is compared to active_rxon
1037  *
1038  * If the RXON structure is changing enough to require a new tune,
1039  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
1040  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
1041  */
1042 static int iwl4965_full_rxon_required(struct iwl4965_priv *priv)
1043 {
1044
1045         /* These items are only settable from the full RXON command */
1046         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
1047             compare_ether_addr(priv->staging_rxon.bssid_addr,
1048                                priv->active_rxon.bssid_addr) ||
1049             compare_ether_addr(priv->staging_rxon.node_addr,
1050                                priv->active_rxon.node_addr) ||
1051             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
1052                                priv->active_rxon.wlap_bssid_addr) ||
1053             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
1054             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
1055             (priv->staging_rxon.air_propagation !=
1056              priv->active_rxon.air_propagation) ||
1057             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
1058              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
1059             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
1060              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
1061             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
1062             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1063                 return 1;
1064
1065         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1066          * be updated with the RXON_ASSOC command -- however only some
1067          * flag transitions are allowed using RXON_ASSOC */
1068
1069         /* Check if we are not switching bands */
1070         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1071             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1072                 return 1;
1073
1074         /* Check if we are switching association toggle */
1075         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1076                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1077                 return 1;
1078
1079         return 0;
1080 }
1081
1082 static int iwl4965_send_rxon_assoc(struct iwl4965_priv *priv)
1083 {
1084         int rc = 0;
1085         struct iwl4965_rx_packet *res = NULL;
1086         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1087         struct iwl4965_host_cmd cmd = {
1088                 .id = REPLY_RXON_ASSOC,
1089                 .len = sizeof(rxon_assoc),
1090                 .meta.flags = CMD_WANT_SKB,
1091                 .data = &rxon_assoc,
1092         };
1093         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
1094         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
1095
1096         if ((rxon1->flags == rxon2->flags) &&
1097             (rxon1->filter_flags == rxon2->filter_flags) &&
1098             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1099             (rxon1->ofdm_ht_single_stream_basic_rates ==
1100              rxon2->ofdm_ht_single_stream_basic_rates) &&
1101             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1102              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1103             (rxon1->rx_chain == rxon2->rx_chain) &&
1104             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1105                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1106                 return 0;
1107         }
1108
1109         rxon_assoc.flags = priv->staging_rxon.flags;
1110         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1111         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1112         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1113         rxon_assoc.reserved = 0;
1114         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1115             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1116         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1117             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1118         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1119
1120         rc = iwl4965_send_cmd_sync(priv, &cmd);
1121         if (rc)
1122                 return rc;
1123
1124         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1125         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1126                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1127                 rc = -EIO;
1128         }
1129
1130         priv->alloc_rxb_skb--;
1131         dev_kfree_skb_any(cmd.meta.u.skb);
1132
1133         return rc;
1134 }
1135
1136 /**
1137  * iwl4965_commit_rxon - commit staging_rxon to hardware
1138  *
1139  * The RXON command in staging_rxon is committed to the hardware and
1140  * the active_rxon structure is updated with the new data.  This
1141  * function correctly transitions out of the RXON_ASSOC_MSK state if
1142  * a HW tune is required based on the RXON structure changes.
1143  */
1144 static int iwl4965_commit_rxon(struct iwl4965_priv *priv)
1145 {
1146         /* cast away the const for active_rxon in this function */
1147         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1148         DECLARE_MAC_BUF(mac);
1149         int rc = 0;
1150
1151         if (!iwl4965_is_alive(priv))
1152                 return -1;
1153
1154         /* always get timestamp with Rx frame */
1155         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1156
1157         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
1158         if (rc) {
1159                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1160                 return -EINVAL;
1161         }
1162
1163         /* If we don't need to send a full RXON, we can use
1164          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
1165          * and other flags for the current radio configuration. */
1166         if (!iwl4965_full_rxon_required(priv)) {
1167                 rc = iwl4965_send_rxon_assoc(priv);
1168                 if (rc) {
1169                         IWL_ERROR("Error setting RXON_ASSOC "
1170                                   "configuration (%d).\n", rc);
1171                         return rc;
1172                 }
1173
1174                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1175
1176                 return 0;
1177         }
1178
1179         /* station table will be cleared */
1180         priv->assoc_station_added = 0;
1181
1182 #ifdef CONFIG_IWL4965_SENSITIVITY
1183         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1184         if (!priv->error_recovering)
1185                 priv->start_calib = 0;
1186
1187         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1188 #endif /* CONFIG_IWL4965_SENSITIVITY */
1189
1190         /* If we are currently associated and the new config requires
1191          * an RXON_ASSOC and the new config wants the associated mask enabled,
1192          * we must clear the associated from the active configuration
1193          * before we apply the new config */
1194         if (iwl4965_is_associated(priv) &&
1195             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1196                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1197                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1198
1199                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1200                                       sizeof(struct iwl4965_rxon_cmd),
1201                                       &priv->active_rxon);
1202
1203                 /* If the mask clearing failed then we set
1204                  * active_rxon back to what it was previously */
1205                 if (rc) {
1206                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1207                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1208                                   "configuration (%d).\n", rc);
1209                         return rc;
1210                 }
1211         }
1212
1213         IWL_DEBUG_INFO("Sending RXON\n"
1214                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1215                        "* channel = %d\n"
1216                        "* bssid = %s\n",
1217                        ((priv->staging_rxon.filter_flags &
1218                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1219                        le16_to_cpu(priv->staging_rxon.channel),
1220                        print_mac(mac, priv->staging_rxon.bssid_addr));
1221
1222         /* Apply the new configuration */
1223         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON,
1224                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
1225         if (rc) {
1226                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1227                 return rc;
1228         }
1229
1230         iwl4965_clear_stations_table(priv);
1231
1232 #ifdef CONFIG_IWL4965_SENSITIVITY
1233         if (!priv->error_recovering)
1234                 priv->start_calib = 0;
1235
1236         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1237         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1238 #endif /* CONFIG_IWL4965_SENSITIVITY */
1239
1240         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1241
1242         /* If we issue a new RXON command which required a tune then we must
1243          * send a new TXPOWER command or we won't be able to Tx any frames */
1244         rc = iwl4965_hw_reg_send_txpower(priv);
1245         if (rc) {
1246                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1247                 return rc;
1248         }
1249
1250         /* Add the broadcast address so we can send broadcast frames */
1251         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
1252             IWL_INVALID_STATION) {
1253                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1254                 return -EIO;
1255         }
1256
1257         /* If we have set the ASSOC_MSK and we are in BSS mode then
1258          * add the IWL_AP_ID to the station rate table */
1259         if (iwl4965_is_associated(priv) &&
1260             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1261                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1262                     == IWL_INVALID_STATION) {
1263                         IWL_ERROR("Error adding AP address for transmit.\n");
1264                         return -EIO;
1265                 }
1266                 priv->assoc_station_added = 1;
1267         }
1268
1269         return 0;
1270 }
1271
1272 static int iwl4965_send_bt_config(struct iwl4965_priv *priv)
1273 {
1274         struct iwl4965_bt_cmd bt_cmd = {
1275                 .flags = 3,
1276                 .lead_time = 0xAA,
1277                 .max_kill = 1,
1278                 .kill_ack_mask = 0,
1279                 .kill_cts_mask = 0,
1280         };
1281
1282         return iwl4965_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1283                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
1284 }
1285
1286 static int iwl4965_send_scan_abort(struct iwl4965_priv *priv)
1287 {
1288         int rc = 0;
1289         struct iwl4965_rx_packet *res;
1290         struct iwl4965_host_cmd cmd = {
1291                 .id = REPLY_SCAN_ABORT_CMD,
1292                 .meta.flags = CMD_WANT_SKB,
1293         };
1294
1295         /* If there isn't a scan actively going on in the hardware
1296          * then we are in between scan bands and not actually
1297          * actively scanning, so don't send the abort command */
1298         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1299                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1300                 return 0;
1301         }
1302
1303         rc = iwl4965_send_cmd_sync(priv, &cmd);
1304         if (rc) {
1305                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1306                 return rc;
1307         }
1308
1309         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1310         if (res->u.status != CAN_ABORT_STATUS) {
1311                 /* The scan abort will return 1 for success or
1312                  * 2 for "failure".  A failure condition can be
1313                  * due to simply not being in an active scan which
1314                  * can occur if we send the scan abort before we
1315                  * the microcode has notified us that a scan is
1316                  * completed. */
1317                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1318                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1319                 clear_bit(STATUS_SCAN_HW, &priv->status);
1320         }
1321
1322         dev_kfree_skb_any(cmd.meta.u.skb);
1323
1324         return rc;
1325 }
1326
1327 static int iwl4965_card_state_sync_callback(struct iwl4965_priv *priv,
1328                                         struct iwl4965_cmd *cmd,
1329                                         struct sk_buff *skb)
1330 {
1331         return 1;
1332 }
1333
1334 /*
1335  * CARD_STATE_CMD
1336  *
1337  * Use: Sets the device's internal card state to enable, disable, or halt
1338  *
1339  * When in the 'enable' state the card operates as normal.
1340  * When in the 'disable' state, the card enters into a low power mode.
1341  * When in the 'halt' state, the card is shut down and must be fully
1342  * restarted to come back on.
1343  */
1344 static int iwl4965_send_card_state(struct iwl4965_priv *priv, u32 flags, u8 meta_flag)
1345 {
1346         struct iwl4965_host_cmd cmd = {
1347                 .id = REPLY_CARD_STATE_CMD,
1348                 .len = sizeof(u32),
1349                 .data = &flags,
1350                 .meta.flags = meta_flag,
1351         };
1352
1353         if (meta_flag & CMD_ASYNC)
1354                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1355
1356         return iwl4965_send_cmd(priv, &cmd);
1357 }
1358
1359 static int iwl4965_add_sta_sync_callback(struct iwl4965_priv *priv,
1360                                      struct iwl4965_cmd *cmd, struct sk_buff *skb)
1361 {
1362         struct iwl4965_rx_packet *res = NULL;
1363
1364         if (!skb) {
1365                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1366                 return 1;
1367         }
1368
1369         res = (struct iwl4965_rx_packet *)skb->data;
1370         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1371                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1372                           res->hdr.flags);
1373                 return 1;
1374         }
1375
1376         switch (res->u.add_sta.status) {
1377         case ADD_STA_SUCCESS_MSK:
1378                 break;
1379         default:
1380                 break;
1381         }
1382
1383         /* We didn't cache the SKB; let the caller free it */
1384         return 1;
1385 }
1386
1387 int iwl4965_send_add_station(struct iwl4965_priv *priv,
1388                          struct iwl4965_addsta_cmd *sta, u8 flags)
1389 {
1390         struct iwl4965_rx_packet *res = NULL;
1391         int rc = 0;
1392         struct iwl4965_host_cmd cmd = {
1393                 .id = REPLY_ADD_STA,
1394                 .len = sizeof(struct iwl4965_addsta_cmd),
1395                 .meta.flags = flags,
1396                 .data = sta,
1397         };
1398
1399         if (flags & CMD_ASYNC)
1400                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1401         else
1402                 cmd.meta.flags |= CMD_WANT_SKB;
1403
1404         rc = iwl4965_send_cmd(priv, &cmd);
1405
1406         if (rc || (flags & CMD_ASYNC))
1407                 return rc;
1408
1409         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1410         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1411                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1412                           res->hdr.flags);
1413                 rc = -EIO;
1414         }
1415
1416         if (rc == 0) {
1417                 switch (res->u.add_sta.status) {
1418                 case ADD_STA_SUCCESS_MSK:
1419                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1420                         break;
1421                 default:
1422                         rc = -EIO;
1423                         IWL_WARNING("REPLY_ADD_STA failed\n");
1424                         break;
1425                 }
1426         }
1427
1428         priv->alloc_rxb_skb--;
1429         dev_kfree_skb_any(cmd.meta.u.skb);
1430
1431         return rc;
1432 }
1433
1434 static int iwl4965_update_sta_key_info(struct iwl4965_priv *priv,
1435                                    struct ieee80211_key_conf *keyconf,
1436                                    u8 sta_id)
1437 {
1438         unsigned long flags;
1439         __le16 key_flags = 0;
1440
1441         switch (keyconf->alg) {
1442         case ALG_CCMP:
1443                 key_flags |= STA_KEY_FLG_CCMP;
1444                 key_flags |= cpu_to_le16(
1445                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1446                 key_flags &= ~STA_KEY_FLG_INVALID;
1447                 break;
1448         case ALG_TKIP:
1449         case ALG_WEP:
1450         default:
1451                 return -EINVAL;
1452         }
1453         spin_lock_irqsave(&priv->sta_lock, flags);
1454         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1455         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1456         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1457                keyconf->keylen);
1458
1459         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1460                keyconf->keylen);
1461         priv->stations[sta_id].sta.key.key_flags = key_flags;
1462         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1463         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1464
1465         spin_unlock_irqrestore(&priv->sta_lock, flags);
1466
1467         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1468         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1469         return 0;
1470 }
1471
1472 static int iwl4965_clear_sta_key_info(struct iwl4965_priv *priv, u8 sta_id)
1473 {
1474         unsigned long flags;
1475
1476         spin_lock_irqsave(&priv->sta_lock, flags);
1477         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1478         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1479         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1480         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1481         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1482         spin_unlock_irqrestore(&priv->sta_lock, flags);
1483
1484         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1485         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1486         return 0;
1487 }
1488
1489 static void iwl4965_clear_free_frames(struct iwl4965_priv *priv)
1490 {
1491         struct list_head *element;
1492
1493         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1494                        priv->frames_count);
1495
1496         while (!list_empty(&priv->free_frames)) {
1497                 element = priv->free_frames.next;
1498                 list_del(element);
1499                 kfree(list_entry(element, struct iwl4965_frame, list));
1500                 priv->frames_count--;
1501         }
1502
1503         if (priv->frames_count) {
1504                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1505                             priv->frames_count);
1506                 priv->frames_count = 0;
1507         }
1508 }
1509
1510 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl4965_priv *priv)
1511 {
1512         struct iwl4965_frame *frame;
1513         struct list_head *element;
1514         if (list_empty(&priv->free_frames)) {
1515                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1516                 if (!frame) {
1517                         IWL_ERROR("Could not allocate frame!\n");
1518                         return NULL;
1519                 }
1520
1521                 priv->frames_count++;
1522                 return frame;
1523         }
1524
1525         element = priv->free_frames.next;
1526         list_del(element);
1527         return list_entry(element, struct iwl4965_frame, list);
1528 }
1529
1530 static void iwl4965_free_frame(struct iwl4965_priv *priv, struct iwl4965_frame *frame)
1531 {
1532         memset(frame, 0, sizeof(*frame));
1533         list_add(&frame->list, &priv->free_frames);
1534 }
1535
1536 unsigned int iwl4965_fill_beacon_frame(struct iwl4965_priv *priv,
1537                                 struct ieee80211_hdr *hdr,
1538                                 const u8 *dest, int left)
1539 {
1540
1541         if (!iwl4965_is_associated(priv) || !priv->ibss_beacon ||
1542             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1543              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1544                 return 0;
1545
1546         if (priv->ibss_beacon->len > left)
1547                 return 0;
1548
1549         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1550
1551         return priv->ibss_beacon->len;
1552 }
1553
1554 int iwl4965_rate_index_from_plcp(int plcp)
1555 {
1556         int i = 0;
1557
1558         /* 4965 HT rate format */
1559         if (plcp & RATE_MCS_HT_MSK) {
1560                 i = (plcp & 0xff);
1561
1562                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1563                         i = i - IWL_RATE_MIMO_6M_PLCP;
1564
1565                 i += IWL_FIRST_OFDM_RATE;
1566                 /* skip 9M not supported in ht*/
1567                 if (i >= IWL_RATE_9M_INDEX)
1568                         i += 1;
1569                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1570                     (i <= IWL_LAST_OFDM_RATE))
1571                         return i;
1572
1573         /* 4965 legacy rate format, search for match in table */
1574         } else {
1575                 for (i = 0; i < ARRAY_SIZE(iwl4965_rates); i++)
1576                         if (iwl4965_rates[i].plcp == (plcp &0xFF))
1577                                 return i;
1578         }
1579         return -1;
1580 }
1581
1582 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1583 {
1584         u8 i;
1585
1586         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1587              i = iwl4965_rates[i].next_ieee) {
1588                 if (rate_mask & (1 << i))
1589                         return iwl4965_rates[i].plcp;
1590         }
1591
1592         return IWL_RATE_INVALID;
1593 }
1594
1595 static int iwl4965_send_beacon_cmd(struct iwl4965_priv *priv)
1596 {
1597         struct iwl4965_frame *frame;
1598         unsigned int frame_size;
1599         int rc;
1600         u8 rate;
1601
1602         frame = iwl4965_get_free_frame(priv);
1603
1604         if (!frame) {
1605                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1606                           "command.\n");
1607                 return -ENOMEM;
1608         }
1609
1610         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1611                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1612                                                 0xFF0);
1613                 if (rate == IWL_INVALID_RATE)
1614                         rate = IWL_RATE_6M_PLCP;
1615         } else {
1616                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1617                 if (rate == IWL_INVALID_RATE)
1618                         rate = IWL_RATE_1M_PLCP;
1619         }
1620
1621         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1622
1623         rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1624                               &frame->u.cmd[0]);
1625
1626         iwl4965_free_frame(priv, frame);
1627
1628         return rc;
1629 }
1630
1631 /******************************************************************************
1632  *
1633  * EEPROM related functions
1634  *
1635  ******************************************************************************/
1636
1637 static void get_eeprom_mac(struct iwl4965_priv *priv, u8 *mac)
1638 {
1639         memcpy(mac, priv->eeprom.mac_address, 6);
1640 }
1641
1642 static inline void iwl4965_eeprom_release_semaphore(struct iwl4965_priv *priv)
1643 {
1644         iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1645                 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
1646 }
1647
1648 /**
1649  * iwl4965_eeprom_init - read EEPROM contents
1650  *
1651  * Load the EEPROM contents from adapter into priv->eeprom
1652  *
1653  * NOTE:  This routine uses the non-debug IO access functions.
1654  */
1655 int iwl4965_eeprom_init(struct iwl4965_priv *priv)
1656 {
1657         u16 *e = (u16 *)&priv->eeprom;
1658         u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
1659         u32 r;
1660         int sz = sizeof(priv->eeprom);
1661         int rc;
1662         int i;
1663         u16 addr;
1664
1665         /* The EEPROM structure has several padding buffers within it
1666          * and when adding new EEPROM maps is subject to programmer errors
1667          * which may be very difficult to identify without explicitly
1668          * checking the resulting size of the eeprom map. */
1669         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1670
1671         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1672                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1673                 return -ENOENT;
1674         }
1675
1676         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1677         rc = iwl4965_eeprom_acquire_semaphore(priv);
1678         if (rc < 0) {
1679                 IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
1680                 return -ENOENT;
1681         }
1682
1683         /* eeprom is an array of 16bit values */
1684         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1685                 _iwl4965_write32(priv, CSR_EEPROM_REG, addr << 1);
1686                 _iwl4965_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1687
1688                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1689                                         i += IWL_EEPROM_ACCESS_DELAY) {
1690                         r = _iwl4965_read_direct32(priv, CSR_EEPROM_REG);
1691                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1692                                 break;
1693                         udelay(IWL_EEPROM_ACCESS_DELAY);
1694                 }
1695
1696                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1697                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1698                         rc = -ETIMEDOUT;
1699                         goto done;
1700                 }
1701                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1702         }
1703         rc = 0;
1704
1705 done:
1706         iwl4965_eeprom_release_semaphore(priv);
1707         return rc;
1708 }
1709
1710 /******************************************************************************
1711  *
1712  * Misc. internal state and helper functions
1713  *
1714  ******************************************************************************/
1715 #ifdef CONFIG_IWL4965_DEBUG
1716
1717 /**
1718  * iwl4965_report_frame - dump frame to syslog during debug sessions
1719  *
1720  * You may hack this function to show different aspects of received frames,
1721  * including selective frame dumps.
1722  * group100 parameter selects whether to show 1 out of 100 good frames.
1723  *
1724  * TODO:  This was originally written for 3945, need to audit for
1725  *        proper operation with 4965.
1726  */
1727 void iwl4965_report_frame(struct iwl4965_priv *priv,
1728                       struct iwl4965_rx_packet *pkt,
1729                       struct ieee80211_hdr *header, int group100)
1730 {
1731         u32 to_us;
1732         u32 print_summary = 0;
1733         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1734         u32 hundred = 0;
1735         u32 dataframe = 0;
1736         u16 fc;
1737         u16 seq_ctl;
1738         u16 channel;
1739         u16 phy_flags;
1740         int rate_sym;
1741         u16 length;
1742         u16 status;
1743         u16 bcn_tmr;
1744         u32 tsf_low;
1745         u64 tsf;
1746         u8 rssi;
1747         u8 agc;
1748         u16 sig_avg;
1749         u16 noise_diff;
1750         struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1751         struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1752         struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
1753         u8 *data = IWL_RX_DATA(pkt);
1754
1755         /* MAC header */
1756         fc = le16_to_cpu(header->frame_control);
1757         seq_ctl = le16_to_cpu(header->seq_ctrl);
1758
1759         /* metadata */
1760         channel = le16_to_cpu(rx_hdr->channel);
1761         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1762         rate_sym = rx_hdr->rate;
1763         length = le16_to_cpu(rx_hdr->len);
1764
1765         /* end-of-frame status and timestamp */
1766         status = le32_to_cpu(rx_end->status);
1767         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1768         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1769         tsf = le64_to_cpu(rx_end->timestamp);
1770
1771         /* signal statistics */
1772         rssi = rx_stats->rssi;
1773         agc = rx_stats->agc;
1774         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1775         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1776
1777         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1778
1779         /* if data frame is to us and all is good,
1780          *   (optionally) print summary for only 1 out of every 100 */
1781         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1782             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1783                 dataframe = 1;
1784                 if (!group100)
1785                         print_summary = 1;      /* print each frame */
1786                 else if (priv->framecnt_to_us < 100) {
1787                         priv->framecnt_to_us++;
1788                         print_summary = 0;
1789                 } else {
1790                         priv->framecnt_to_us = 0;
1791                         print_summary = 1;
1792                         hundred = 1;
1793                 }
1794         } else {
1795                 /* print summary for all other frames */
1796                 print_summary = 1;
1797         }
1798
1799         if (print_summary) {
1800                 char *title;
1801                 u32 rate;
1802
1803                 if (hundred)
1804                         title = "100Frames";
1805                 else if (fc & IEEE80211_FCTL_RETRY)
1806                         title = "Retry";
1807                 else if (ieee80211_is_assoc_response(fc))
1808                         title = "AscRsp";
1809                 else if (ieee80211_is_reassoc_response(fc))
1810                         title = "RasRsp";
1811                 else if (ieee80211_is_probe_response(fc)) {
1812                         title = "PrbRsp";
1813                         print_dump = 1; /* dump frame contents */
1814                 } else if (ieee80211_is_beacon(fc)) {
1815                         title = "Beacon";
1816                         print_dump = 1; /* dump frame contents */
1817                 } else if (ieee80211_is_atim(fc))
1818                         title = "ATIM";
1819                 else if (ieee80211_is_auth(fc))
1820                         title = "Auth";
1821                 else if (ieee80211_is_deauth(fc))
1822                         title = "DeAuth";
1823                 else if (ieee80211_is_disassoc(fc))
1824                         title = "DisAssoc";
1825                 else
1826                         title = "Frame";
1827
1828                 rate = iwl4965_rate_index_from_plcp(rate_sym);
1829                 if (rate == -1)
1830                         rate = 0;
1831                 else
1832                         rate = iwl4965_rates[rate].ieee / 2;
1833
1834                 /* print frame summary.
1835                  * MAC addresses show just the last byte (for brevity),
1836                  *    but you can hack it to show more, if you'd like to. */
1837                 if (dataframe)
1838                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1839                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1840                                      title, fc, header->addr1[5],
1841                                      length, rssi, channel, rate);
1842                 else {
1843                         /* src/dst addresses assume managed mode */
1844                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1845                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1846                                      "phy=0x%02x, chnl=%d\n",
1847                                      title, fc, header->addr1[5],
1848                                      header->addr3[5], rssi,
1849                                      tsf_low - priv->scan_start_tsf,
1850                                      phy_flags, channel);
1851                 }
1852         }
1853         if (print_dump)
1854                 iwl4965_print_hex_dump(IWL_DL_RX, data, length);
1855 }
1856 #endif
1857
1858 static void iwl4965_unset_hw_setting(struct iwl4965_priv *priv)
1859 {
1860         if (priv->hw_setting.shared_virt)
1861                 pci_free_consistent(priv->pci_dev,
1862                                     sizeof(struct iwl4965_shared),
1863                                     priv->hw_setting.shared_virt,
1864                                     priv->hw_setting.shared_phys);
1865 }
1866
1867 /**
1868  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1869  *
1870  * return : set the bit for each supported rate insert in ie
1871  */
1872 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1873                                     u16 basic_rate, int *left)
1874 {
1875         u16 ret_rates = 0, bit;
1876         int i;
1877         u8 *cnt = ie;
1878         u8 *rates = ie + 1;
1879
1880         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1881                 if (bit & supported_rate) {
1882                         ret_rates |= bit;
1883                         rates[*cnt] = iwl4965_rates[i].ieee |
1884                                 ((bit & basic_rate) ? 0x80 : 0x00);
1885                         (*cnt)++;
1886                         (*left)--;
1887                         if ((*left <= 0) ||
1888                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1889                                 break;
1890                 }
1891         }
1892
1893         return ret_rates;
1894 }
1895
1896 /**
1897  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1898  */
1899 static u16 iwl4965_fill_probe_req(struct iwl4965_priv *priv,
1900                                   enum ieee80211_band band,
1901                                   struct ieee80211_mgmt *frame,
1902                                   int left, int is_direct)
1903 {
1904         int len = 0;
1905         u8 *pos = NULL;
1906         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1907 #ifdef CONFIG_IWL4965_HT
1908         const struct ieee80211_supported_band *sband =
1909                                                 iwl4965_get_hw_mode(priv, band);
1910 #endif /* CONFIG_IWL4965_HT */
1911
1912         /* Make sure there is enough space for the probe request,
1913          * two mandatory IEs and the data */
1914         left -= 24;
1915         if (left < 0)
1916                 return 0;
1917         len += 24;
1918
1919         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1920         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1921         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1922         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1923         frame->seq_ctrl = 0;
1924
1925         /* fill in our indirect SSID IE */
1926         /* ...next IE... */
1927
1928         left -= 2;
1929         if (left < 0)
1930                 return 0;
1931         len += 2;
1932         pos = &(frame->u.probe_req.variable[0]);
1933         *pos++ = WLAN_EID_SSID;
1934         *pos++ = 0;
1935
1936         /* fill in our direct SSID IE... */
1937         if (is_direct) {
1938                 /* ...next IE... */
1939                 left -= 2 + priv->essid_len;
1940                 if (left < 0)
1941                         return 0;
1942                 /* ... fill it in... */
1943                 *pos++ = WLAN_EID_SSID;
1944                 *pos++ = priv->essid_len;
1945                 memcpy(pos, priv->essid, priv->essid_len);
1946                 pos += priv->essid_len;
1947                 len += 2 + priv->essid_len;
1948         }
1949
1950         /* fill in supported rate */
1951         /* ...next IE... */
1952         left -= 2;
1953         if (left < 0)
1954                 return 0;
1955
1956         /* ... fill it in... */
1957         *pos++ = WLAN_EID_SUPP_RATES;
1958         *pos = 0;
1959
1960         /* exclude 60M rate */
1961         active_rates = priv->rates_mask;
1962         active_rates &= ~IWL_RATE_60M_MASK;
1963
1964         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1965
1966         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1967         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1968                         active_rate_basic, &left);
1969         active_rates &= ~ret_rates;
1970
1971         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1972                                  active_rate_basic, &left);
1973         active_rates &= ~ret_rates;
1974
1975         len += 2 + *pos;
1976         pos += (*pos) + 1;
1977         if (active_rates == 0)
1978                 goto fill_end;
1979
1980         /* fill in supported extended rate */
1981         /* ...next IE... */
1982         left -= 2;
1983         if (left < 0)
1984                 return 0;
1985         /* ... fill it in... */
1986         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1987         *pos = 0;
1988         iwl4965_supported_rate_to_ie(pos, active_rates,
1989                                  active_rate_basic, &left);
1990         if (*pos > 0)
1991                 len += 2 + *pos;
1992
1993 #ifdef CONFIG_IWL4965_HT
1994         if (sband && sband->ht_info.ht_supported) {
1995                 struct ieee80211_ht_cap *ht_cap;
1996                 pos += (*pos) + 1;
1997                 *pos++ = WLAN_EID_HT_CAPABILITY;
1998                 *pos++ = sizeof(struct ieee80211_ht_cap);
1999                 ht_cap = (struct ieee80211_ht_cap *)pos;
2000                 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
2001                 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
2002                 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
2003                                             IEEE80211_HT_CAP_AMPDU_FACTOR) |
2004                                             ((sband->ht_info.ampdu_density << 2) &
2005                                             IEEE80211_HT_CAP_AMPDU_DENSITY);
2006                 len += 2 + sizeof(struct ieee80211_ht_cap);
2007         }
2008 #endif  /*CONFIG_IWL4965_HT */
2009
2010  fill_end:
2011         return (u16)len;
2012 }
2013
2014 /*
2015  * QoS  support
2016 */
2017 static int iwl4965_send_qos_params_command(struct iwl4965_priv *priv,
2018                                        struct iwl4965_qosparam_cmd *qos)
2019 {
2020
2021         return iwl4965_send_cmd_pdu(priv, REPLY_QOS_PARAM,
2022                                 sizeof(struct iwl4965_qosparam_cmd), qos);
2023 }
2024
2025 static void iwl4965_reset_qos(struct iwl4965_priv *priv)
2026 {
2027         u16 cw_min = 15;
2028         u16 cw_max = 1023;
2029         u8 aifs = 2;
2030         u8 is_legacy = 0;
2031         unsigned long flags;
2032         int i;
2033
2034         spin_lock_irqsave(&priv->lock, flags);
2035         priv->qos_data.qos_active = 0;
2036
2037         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
2038                 if (priv->qos_data.qos_enable)
2039                         priv->qos_data.qos_active = 1;
2040                 if (!(priv->active_rate & 0xfff0)) {
2041                         cw_min = 31;
2042                         is_legacy = 1;
2043                 }
2044         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2045                 if (priv->qos_data.qos_enable)
2046                         priv->qos_data.qos_active = 1;
2047         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
2048                 cw_min = 31;
2049                 is_legacy = 1;
2050         }
2051
2052         if (priv->qos_data.qos_active)
2053                 aifs = 3;
2054
2055         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
2056         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
2057         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
2058         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
2059         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
2060
2061         if (priv->qos_data.qos_active) {
2062                 i = 1;
2063                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
2064                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
2065                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
2066                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2067                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2068
2069                 i = 2;
2070                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2071                         cpu_to_le16((cw_min + 1) / 2 - 1);
2072                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2073                         cpu_to_le16(cw_max);
2074                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2075                 if (is_legacy)
2076                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2077                                 cpu_to_le16(6016);
2078                 else
2079                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2080                                 cpu_to_le16(3008);
2081                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2082
2083                 i = 3;
2084                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2085                         cpu_to_le16((cw_min + 1) / 4 - 1);
2086                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2087                         cpu_to_le16((cw_max + 1) / 2 - 1);
2088                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2089                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2090                 if (is_legacy)
2091                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2092                                 cpu_to_le16(3264);
2093                 else
2094                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2095                                 cpu_to_le16(1504);
2096         } else {
2097                 for (i = 1; i < 4; i++) {
2098                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2099                                 cpu_to_le16(cw_min);
2100                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2101                                 cpu_to_le16(cw_max);
2102                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2103                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2104                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2105                 }
2106         }
2107         IWL_DEBUG_QOS("set QoS to default \n");
2108
2109         spin_unlock_irqrestore(&priv->lock, flags);
2110 }
2111
2112 static void iwl4965_activate_qos(struct iwl4965_priv *priv, u8 force)
2113 {
2114         unsigned long flags;
2115
2116         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2117                 return;
2118
2119         if (!priv->qos_data.qos_enable)
2120                 return;
2121
2122         spin_lock_irqsave(&priv->lock, flags);
2123         priv->qos_data.def_qos_parm.qos_flags = 0;
2124
2125         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2126             !priv->qos_data.qos_cap.q_AP.txop_request)
2127                 priv->qos_data.def_qos_parm.qos_flags |=
2128                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2129         if (priv->qos_data.qos_active)
2130                 priv->qos_data.def_qos_parm.qos_flags |=
2131                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2132
2133 #ifdef CONFIG_IWL4965_HT
2134         if (priv->current_ht_config.is_ht)
2135                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2136 #endif /* CONFIG_IWL4965_HT */
2137
2138         spin_unlock_irqrestore(&priv->lock, flags);
2139
2140         if (force || iwl4965_is_associated(priv)) {
2141                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2142                                 priv->qos_data.qos_active,
2143                                 priv->qos_data.def_qos_parm.qos_flags);
2144
2145                 iwl4965_send_qos_params_command(priv,
2146                                 &(priv->qos_data.def_qos_parm));
2147         }
2148 }
2149
2150 /*
2151  * Power management (not Tx power!) functions
2152  */
2153 #define MSEC_TO_USEC 1024
2154
2155 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2156 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2157 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2158 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2159                                      __constant_cpu_to_le32(X1), \
2160                                      __constant_cpu_to_le32(X2), \
2161                                      __constant_cpu_to_le32(X3), \
2162                                      __constant_cpu_to_le32(X4)}
2163
2164
2165 /* default power management (not Tx power) table values */
2166 /* for tim  0-10 */
2167 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
2168         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2169         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2170         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2171         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2172         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2173         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2174 };
2175
2176 /* for tim > 10 */
2177 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
2178         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2179         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2180                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2181         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2182                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2183         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2184                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2185         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2186         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2187                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2188 };
2189
2190 int iwl4965_power_init_handle(struct iwl4965_priv *priv)
2191 {
2192         int rc = 0, i;
2193         struct iwl4965_power_mgr *pow_data;
2194         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
2195         u16 pci_pm;
2196
2197         IWL_DEBUG_POWER("Initialize power \n");
2198
2199         pow_data = &(priv->power_data);
2200
2201         memset(pow_data, 0, sizeof(*pow_data));
2202
2203         pow_data->active_index = IWL_POWER_RANGE_0;
2204         pow_data->dtim_val = 0xffff;
2205
2206         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2207         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2208
2209         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2210         if (rc != 0)
2211                 return 0;
2212         else {
2213                 struct iwl4965_powertable_cmd *cmd;
2214
2215                 IWL_DEBUG_POWER("adjust power command flags\n");
2216
2217                 for (i = 0; i < IWL_POWER_AC; i++) {
2218                         cmd = &pow_data->pwr_range_0[i].cmd;
2219
2220                         if (pci_pm & 0x1)
2221                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2222                         else
2223                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2224                 }
2225         }
2226         return rc;
2227 }
2228
2229 static int iwl4965_update_power_cmd(struct iwl4965_priv *priv,
2230                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
2231 {
2232         int rc = 0, i;
2233         u8 skip;
2234         u32 max_sleep = 0;
2235         struct iwl4965_power_vec_entry *range;
2236         u8 period = 0;
2237         struct iwl4965_power_mgr *pow_data;
2238
2239         if (mode > IWL_POWER_INDEX_5) {
2240                 IWL_DEBUG_POWER("Error invalid power mode \n");
2241                 return -1;
2242         }
2243         pow_data = &(priv->power_data);
2244
2245         if (pow_data->active_index == IWL_POWER_RANGE_0)
2246                 range = &pow_data->pwr_range_0[0];
2247         else
2248                 range = &pow_data->pwr_range_1[1];
2249
2250         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
2251
2252 #ifdef IWL_MAC80211_DISABLE
2253         if (priv->assoc_network != NULL) {
2254                 unsigned long flags;
2255
2256                 period = priv->assoc_network->tim.tim_period;
2257         }
2258 #endif  /*IWL_MAC80211_DISABLE */
2259         skip = range[mode].no_dtim;
2260
2261         if (period == 0) {
2262                 period = 1;
2263                 skip = 0;
2264         }
2265
2266         if (skip == 0) {
2267                 max_sleep = period;
2268                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2269         } else {
2270                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2271                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2272                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2273         }
2274
2275         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2276                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2277                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2278         }
2279
2280         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2281         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2282         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2283         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2284                         le32_to_cpu(cmd->sleep_interval[0]),
2285                         le32_to_cpu(cmd->sleep_interval[1]),
2286                         le32_to_cpu(cmd->sleep_interval[2]),
2287                         le32_to_cpu(cmd->sleep_interval[3]),
2288                         le32_to_cpu(cmd->sleep_interval[4]));
2289
2290         return rc;
2291 }
2292
2293 static int iwl4965_send_power_mode(struct iwl4965_priv *priv, u32 mode)
2294 {
2295         u32 uninitialized_var(final_mode);
2296         int rc;
2297         struct iwl4965_powertable_cmd cmd;
2298
2299         /* If on battery, set to 3,
2300          * if plugged into AC power, set to CAM ("continuously aware mode"),
2301          * else user level */
2302         switch (mode) {
2303         case IWL_POWER_BATTERY:
2304                 final_mode = IWL_POWER_INDEX_3;
2305                 break;
2306         case IWL_POWER_AC:
2307                 final_mode = IWL_POWER_MODE_CAM;
2308                 break;
2309         default:
2310                 final_mode = mode;
2311                 break;
2312         }
2313
2314         cmd.keep_alive_beacons = 0;
2315
2316         iwl4965_update_power_cmd(priv, &cmd, final_mode);
2317
2318         rc = iwl4965_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2319
2320         if (final_mode == IWL_POWER_MODE_CAM)
2321                 clear_bit(STATUS_POWER_PMI, &priv->status);
2322         else
2323                 set_bit(STATUS_POWER_PMI, &priv->status);
2324
2325         return rc;
2326 }
2327
2328 int iwl4965_is_network_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
2329 {
2330         /* Filter incoming packets to determine if they are targeted toward
2331          * this network, discarding packets coming from ourselves */
2332         switch (priv->iw_mode) {
2333         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2334                 /* packets from our adapter are dropped (echo) */
2335                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2336                         return 0;
2337                 /* {broad,multi}cast packets to our IBSS go through */
2338                 if (is_multicast_ether_addr(header->addr1))
2339                         return !compare_ether_addr(header->addr3, priv->bssid);
2340                 /* packets to our adapter go through */
2341                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2342         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2343                 /* packets from our adapter are dropped (echo) */
2344                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2345                         return 0;
2346                 /* {broad,multi}cast packets to our BSS go through */
2347                 if (is_multicast_ether_addr(header->addr1))
2348                         return !compare_ether_addr(header->addr2, priv->bssid);
2349                 /* packets to our adapter go through */
2350                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2351         }
2352
2353         return 1;
2354 }
2355
2356 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2357
2358 static const char *iwl4965_get_tx_fail_reason(u32 status)
2359 {
2360         switch (status & TX_STATUS_MSK) {
2361         case TX_STATUS_SUCCESS:
2362                 return "SUCCESS";
2363                 TX_STATUS_ENTRY(SHORT_LIMIT);
2364                 TX_STATUS_ENTRY(LONG_LIMIT);
2365                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2366                 TX_STATUS_ENTRY(MGMNT_ABORT);
2367                 TX_STATUS_ENTRY(NEXT_FRAG);
2368                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2369                 TX_STATUS_ENTRY(DEST_PS);
2370                 TX_STATUS_ENTRY(ABORTED);
2371                 TX_STATUS_ENTRY(BT_RETRY);
2372                 TX_STATUS_ENTRY(STA_INVALID);
2373                 TX_STATUS_ENTRY(FRAG_DROPPED);
2374                 TX_STATUS_ENTRY(TID_DISABLE);
2375                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2376                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2377                 TX_STATUS_ENTRY(TX_LOCKED);
2378                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2379         }
2380
2381         return "UNKNOWN";
2382 }
2383
2384 /**
2385  * iwl4965_scan_cancel - Cancel any currently executing HW scan
2386  *
2387  * NOTE: priv->mutex is not required before calling this function
2388  */
2389 static int iwl4965_scan_cancel(struct iwl4965_priv *priv)
2390 {
2391         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2392                 clear_bit(STATUS_SCANNING, &priv->status);
2393                 return 0;
2394         }
2395
2396         if (test_bit(STATUS_SCANNING, &priv->status)) {
2397                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2398                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2399                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2400                         queue_work(priv->workqueue, &priv->abort_scan);
2401
2402                 } else
2403                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2404
2405                 return test_bit(STATUS_SCANNING, &priv->status);
2406         }
2407
2408         return 0;
2409 }
2410
2411 /**
2412  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
2413  * @ms: amount of time to wait (in milliseconds) for scan to abort
2414  *
2415  * NOTE: priv->mutex must be held before calling this function
2416  */
2417 static int iwl4965_scan_cancel_timeout(struct iwl4965_priv *priv, unsigned long ms)
2418 {
2419         unsigned long now = jiffies;
2420         int ret;
2421
2422         ret = iwl4965_scan_cancel(priv);
2423         if (ret && ms) {
2424                 mutex_unlock(&priv->mutex);
2425                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2426                                 test_bit(STATUS_SCANNING, &priv->status))
2427                         msleep(1);
2428                 mutex_lock(&priv->mutex);
2429
2430                 return test_bit(STATUS_SCANNING, &priv->status);
2431         }
2432
2433         return ret;
2434 }
2435
2436 static void iwl4965_sequence_reset(struct iwl4965_priv *priv)
2437 {
2438         /* Reset ieee stats */
2439
2440         /* We don't reset the net_device_stats (ieee->stats) on
2441          * re-association */
2442
2443         priv->last_seq_num = -1;
2444         priv->last_frag_num = -1;
2445         priv->last_packet_time = 0;
2446
2447         iwl4965_scan_cancel(priv);
2448 }
2449
2450 #define MAX_UCODE_BEACON_INTERVAL       4096
2451 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2452
2453 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
2454 {
2455         u16 new_val = 0;
2456         u16 beacon_factor = 0;
2457
2458         beacon_factor =
2459             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2460                 / MAX_UCODE_BEACON_INTERVAL;
2461         new_val = beacon_val / beacon_factor;
2462
2463         return cpu_to_le16(new_val);
2464 }
2465
2466 static void iwl4965_setup_rxon_timing(struct iwl4965_priv *priv)
2467 {
2468         u64 interval_tm_unit;
2469         u64 tsf, result;
2470         unsigned long flags;
2471         struct ieee80211_conf *conf = NULL;
2472         u16 beacon_int = 0;
2473
2474         conf = ieee80211_get_hw_conf(priv->hw);
2475
2476         spin_lock_irqsave(&priv->lock, flags);
2477         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2478         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2479
2480         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2481
2482         tsf = priv->timestamp1;
2483         tsf = ((tsf << 32) | priv->timestamp0);
2484
2485         beacon_int = priv->beacon_int;
2486         spin_unlock_irqrestore(&priv->lock, flags);
2487
2488         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2489                 if (beacon_int == 0) {
2490                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2491                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2492                 } else {
2493                         priv->rxon_timing.beacon_interval =
2494                                 cpu_to_le16(beacon_int);
2495                         priv->rxon_timing.beacon_interval =
2496                             iwl4965_adjust_beacon_interval(
2497                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2498                 }
2499
2500                 priv->rxon_timing.atim_window = 0;
2501         } else {
2502                 priv->rxon_timing.beacon_interval =
2503                         iwl4965_adjust_beacon_interval(conf->beacon_int);
2504                 /* TODO: we need to get atim_window from upper stack
2505                  * for now we set to 0 */
2506                 priv->rxon_timing.atim_window = 0;
2507         }
2508
2509         interval_tm_unit =
2510                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2511         result = do_div(tsf, interval_tm_unit);
2512         priv->rxon_timing.beacon_init_val =
2513             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2514
2515         IWL_DEBUG_ASSOC
2516             ("beacon interval %d beacon timer %d beacon tim %d\n",
2517                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2518                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2519                 le16_to_cpu(priv->rxon_timing.atim_window));
2520 }
2521
2522 static int iwl4965_scan_initiate(struct iwl4965_priv *priv)
2523 {
2524         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2525                 IWL_ERROR("APs don't scan.\n");
2526                 return 0;
2527         }
2528
2529         if (!iwl4965_is_ready_rf(priv)) {
2530                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2531                 return -EIO;
2532         }
2533
2534         if (test_bit(STATUS_SCANNING, &priv->status)) {
2535                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2536                 return -EAGAIN;
2537         }
2538
2539         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2540                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2541                                "Queuing.\n");
2542                 return -EAGAIN;
2543         }
2544
2545         IWL_DEBUG_INFO("Starting scan...\n");
2546         priv->scan_bands = 2;
2547         set_bit(STATUS_SCANNING, &priv->status);
2548         priv->scan_start = jiffies;
2549         priv->scan_pass_start = priv->scan_start;
2550
2551         queue_work(priv->workqueue, &priv->request_scan);
2552
2553         return 0;
2554 }
2555
2556 static int iwl4965_set_rxon_hwcrypto(struct iwl4965_priv *priv, int hw_decrypt)
2557 {
2558         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
2559
2560         if (hw_decrypt)
2561                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2562         else
2563                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2564
2565         return 0;
2566 }
2567
2568 static void iwl4965_set_flags_for_phymode(struct iwl4965_priv *priv,
2569                                           enum ieee80211_band band)
2570 {
2571         if (band == IEEE80211_BAND_5GHZ) {
2572                 priv->staging_rxon.flags &=
2573                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2574                       | RXON_FLG_CCK_MSK);
2575                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2576         } else {
2577                 /* Copied from iwl4965_bg_post_associate() */
2578                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2579                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2580                 else
2581                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2582
2583                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2584                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2585
2586                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2587                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2588                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2589         }
2590 }
2591
2592 /*
2593  * initialize rxon structure with default values from eeprom
2594  */
2595 static void iwl4965_connection_init_rx_config(struct iwl4965_priv *priv)
2596 {
2597         const struct iwl4965_channel_info *ch_info;
2598
2599         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2600
2601         switch (priv->iw_mode) {
2602         case IEEE80211_IF_TYPE_AP:
2603                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2604                 break;
2605
2606         case IEEE80211_IF_TYPE_STA:
2607                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2608                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2609                 break;
2610
2611         case IEEE80211_IF_TYPE_IBSS:
2612                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2613                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2614                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2615                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2616                 break;
2617
2618         case IEEE80211_IF_TYPE_MNTR:
2619                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2620                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2621                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2622                 break;
2623         }
2624
2625 #if 0
2626         /* TODO:  Figure out when short_preamble would be set and cache from
2627          * that */
2628         if (!hw_to_local(priv->hw)->short_preamble)
2629                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2630         else
2631                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2632 #endif
2633
2634         ch_info = iwl4965_get_channel_info(priv, priv->band,
2635                                        le16_to_cpu(priv->staging_rxon.channel));
2636
2637         if (!ch_info)
2638                 ch_info = &priv->channel_info[0];
2639
2640         /*
2641          * in some case A channels are all non IBSS
2642          * in this case force B/G channel
2643          */
2644         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2645             !(is_channel_ibss(ch_info)))
2646                 ch_info = &priv->channel_info[0];
2647
2648         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2649         priv->band = ch_info->band;
2650
2651         iwl4965_set_flags_for_phymode(priv, priv->band);
2652
2653         priv->staging_rxon.ofdm_basic_rates =
2654             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2655         priv->staging_rxon.cck_basic_rates =
2656             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2657
2658         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2659                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2660         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2661         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2662         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2663         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2664         iwl4965_set_rxon_chain(priv);
2665 }
2666
2667 static int iwl4965_set_mode(struct iwl4965_priv *priv, int mode)
2668 {
2669         if (mode == IEEE80211_IF_TYPE_IBSS) {
2670                 const struct iwl4965_channel_info *ch_info;
2671
2672                 ch_info = iwl4965_get_channel_info(priv,
2673                         priv->band,
2674                         le16_to_cpu(priv->staging_rxon.channel));
2675
2676                 if (!ch_info || !is_channel_ibss(ch_info)) {
2677                         IWL_ERROR("channel %d not IBSS channel\n",
2678                                   le16_to_cpu(priv->staging_rxon.channel));
2679                         return -EINVAL;
2680                 }
2681         }
2682
2683         priv->iw_mode = mode;
2684
2685         iwl4965_connection_init_rx_config(priv);
2686         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2687
2688         iwl4965_clear_stations_table(priv);
2689
2690         /* dont commit rxon if rf-kill is on*/
2691         if (!iwl4965_is_ready_rf(priv))
2692                 return -EAGAIN;
2693
2694         cancel_delayed_work(&priv->scan_check);
2695         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2696                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2697                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2698                 return -EAGAIN;
2699         }
2700
2701         iwl4965_commit_rxon(priv);
2702
2703         return 0;
2704 }
2705
2706 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl4965_priv *priv,
2707                                       struct ieee80211_tx_control *ctl,
2708                                       struct iwl4965_cmd *cmd,
2709                                       struct sk_buff *skb_frag,
2710                                       int last_frag)
2711 {
2712         struct iwl4965_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2713
2714         switch (keyinfo->alg) {
2715         case ALG_CCMP:
2716                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2717                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2718                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2719                 break;
2720
2721         case ALG_TKIP:
2722 #if 0
2723                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2724
2725                 if (last_frag)
2726                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2727                                8);
2728                 else
2729                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2730 #endif
2731                 break;
2732
2733         case ALG_WEP:
2734                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2735                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2736
2737                 if (keyinfo->keylen == 13)
2738                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2739
2740                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2741
2742                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2743                              "with key %d\n", ctl->key_idx);
2744                 break;
2745
2746         default:
2747                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2748                 break;
2749         }
2750 }
2751
2752 /*
2753  * handle build REPLY_TX command notification.
2754  */
2755 static void iwl4965_build_tx_cmd_basic(struct iwl4965_priv *priv,
2756                                   struct iwl4965_cmd *cmd,
2757                                   struct ieee80211_tx_control *ctrl,
2758                                   struct ieee80211_hdr *hdr,
2759                                   int is_unicast, u8 std_id)
2760 {
2761         __le16 *qc;
2762         u16 fc = le16_to_cpu(hdr->frame_control);
2763         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2764
2765         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2766         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2767                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2768                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2769                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2770                 if (ieee80211_is_probe_response(fc) &&
2771                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2772                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2773         } else {
2774                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2775                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2776         }
2777
2778         if (ieee80211_is_back_request(fc))
2779                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2780
2781
2782         cmd->cmd.tx.sta_id = std_id;
2783         if (ieee80211_get_morefrag(hdr))
2784                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2785
2786         qc = ieee80211_get_qos_ctrl(hdr);
2787         if (qc) {
2788                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2789                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2790         } else
2791                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2792
2793         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2794                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2795                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2796         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2797                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2798                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2799         }
2800
2801         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2802                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2803
2804         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2805         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2806                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2807                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2808                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2809                 else
2810                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2811         } else
2812                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2813
2814         cmd->cmd.tx.driver_txop = 0;
2815         cmd->cmd.tx.tx_flags = tx_flags;
2816         cmd->cmd.tx.next_frame_len = 0;
2817 }
2818
2819 /**
2820  * iwl4965_get_sta_id - Find station's index within station table
2821  *
2822  * If new IBSS station, create new entry in station table
2823  */
2824 static int iwl4965_get_sta_id(struct iwl4965_priv *priv,
2825                                 struct ieee80211_hdr *hdr)
2826 {
2827         int sta_id;
2828         u16 fc = le16_to_cpu(hdr->frame_control);
2829         DECLARE_MAC_BUF(mac);
2830
2831         /* If this frame is broadcast or management, use broadcast station id */
2832         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2833             is_multicast_ether_addr(hdr->addr1))
2834                 return priv->hw_setting.bcast_sta_id;
2835
2836         switch (priv->iw_mode) {
2837
2838         /* If we are a client station in a BSS network, use the special
2839          * AP station entry (that's the only station we communicate with) */
2840         case IEEE80211_IF_TYPE_STA:
2841                 return IWL_AP_ID;
2842
2843         /* If we are an AP, then find the station, or use BCAST */
2844         case IEEE80211_IF_TYPE_AP:
2845                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2846                 if (sta_id != IWL_INVALID_STATION)
2847                         return sta_id;
2848                 return priv->hw_setting.bcast_sta_id;
2849
2850         /* If this frame is going out to an IBSS network, find the station,
2851          * or create a new station table entry */
2852         case IEEE80211_IF_TYPE_IBSS:
2853                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2854                 if (sta_id != IWL_INVALID_STATION)
2855                         return sta_id;
2856
2857                 /* Create new station table entry */
2858                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2859                                                    0, CMD_ASYNC, NULL);
2860
2861                 if (sta_id != IWL_INVALID_STATION)
2862                         return sta_id;
2863
2864                 IWL_DEBUG_DROP("Station %s not in station map. "
2865                                "Defaulting to broadcast...\n",
2866                                print_mac(mac, hdr->addr1));
2867                 iwl4965_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2868                 return priv->hw_setting.bcast_sta_id;
2869
2870         default:
2871                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2872                 return priv->hw_setting.bcast_sta_id;
2873         }
2874 }
2875
2876 /*
2877  * start REPLY_TX command process
2878  */
2879 static int iwl4965_tx_skb(struct iwl4965_priv *priv,
2880                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2881 {
2882         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2883         struct iwl4965_tfd_frame *tfd;
2884         u32 *control_flags;
2885         int txq_id = ctl->queue;
2886         struct iwl4965_tx_queue *txq = NULL;
2887         struct iwl4965_queue *q = NULL;
2888         dma_addr_t phys_addr;
2889         dma_addr_t txcmd_phys;
2890         dma_addr_t scratch_phys;
2891         struct iwl4965_cmd *out_cmd = NULL;
2892         u16 len, idx, len_org;
2893         u8 id, hdr_len, unicast;
2894         u8 sta_id;
2895         u16 seq_number = 0;
2896         u16 fc;
2897         __le16 *qc;
2898         u8 wait_write_ptr = 0;
2899         unsigned long flags;
2900         int rc;
2901
2902         spin_lock_irqsave(&priv->lock, flags);
2903         if (iwl4965_is_rfkill(priv)) {
2904                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2905                 goto drop_unlock;
2906         }
2907
2908         if (!priv->vif) {
2909                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2910                 goto drop_unlock;
2911         }
2912
2913         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2914                 IWL_ERROR("ERROR: No TX rate available.\n");
2915                 goto drop_unlock;
2916         }
2917
2918         unicast = !is_multicast_ether_addr(hdr->addr1);
2919         id = 0;
2920
2921         fc = le16_to_cpu(hdr->frame_control);
2922
2923 #ifdef CONFIG_IWL4965_DEBUG
2924         if (ieee80211_is_auth(fc))
2925                 IWL_DEBUG_TX("Sending AUTH frame\n");
2926         else if (ieee80211_is_assoc_request(fc))
2927                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2928         else if (ieee80211_is_reassoc_request(fc))
2929                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2930 #endif
2931
2932         /* drop all data frame if we are not associated */
2933         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2934            (!iwl4965_is_associated(priv) ||
2935             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2936             !priv->assoc_station_added)) {
2937                 IWL_DEBUG_DROP("Dropping - !iwl4965_is_associated\n");
2938                 goto drop_unlock;
2939         }
2940
2941         spin_unlock_irqrestore(&priv->lock, flags);
2942
2943         hdr_len = ieee80211_get_hdrlen(fc);
2944
2945         /* Find (or create) index into station table for destination station */
2946         sta_id = iwl4965_get_sta_id(priv, hdr);
2947         if (sta_id == IWL_INVALID_STATION) {
2948                 DECLARE_MAC_BUF(mac);
2949
2950                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2951                                print_mac(mac, hdr->addr1));
2952                 goto drop;
2953         }
2954
2955         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2956
2957         qc = ieee80211_get_qos_ctrl(hdr);
2958         if (qc) {
2959                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2960                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2961                                 IEEE80211_SCTL_SEQ;
2962                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2963                         (hdr->seq_ctrl &
2964                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2965                 seq_number += 0x10;
2966 #ifdef CONFIG_IWL4965_HT
2967                 /* aggregation is on for this <sta,tid> */
2968                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2969                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2970                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2971 #endif /* CONFIG_IWL4965_HT */
2972         }
2973
2974         /* Descriptor for chosen Tx queue */
2975         txq = &priv->txq[txq_id];
2976         q = &txq->q;
2977
2978         spin_lock_irqsave(&priv->lock, flags);
2979
2980         /* Set up first empty TFD within this queue's circular TFD buffer */
2981         tfd = &txq->bd[q->write_ptr];
2982         memset(tfd, 0, sizeof(*tfd));
2983         control_flags = (u32 *) tfd;
2984         idx = get_cmd_index(q, q->write_ptr, 0);
2985
2986         /* Set up driver data for this TFD */
2987         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2988         txq->txb[q->write_ptr].skb[0] = skb;
2989         memcpy(&(txq->txb[q->write_ptr].status.control),
2990                ctl, sizeof(struct ieee80211_tx_control));
2991
2992         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2993         out_cmd = &txq->cmd[idx];
2994         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2995         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2996
2997         /*
2998          * Set up the Tx-command (not MAC!) header.
2999          * Store the chosen Tx queue and TFD index within the sequence field;
3000          * after Tx, uCode's Tx response will return this value so driver can
3001          * locate the frame within the tx queue and do post-tx processing.
3002          */
3003         out_cmd->hdr.cmd = REPLY_TX;
3004         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
3005                                 INDEX_TO_SEQ(q->write_ptr)));
3006
3007         /* Copy MAC header from skb into command buffer */
3008         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
3009
3010         /*
3011          * Use the first empty entry in this queue's command buffer array
3012          * to contain the Tx command and MAC header concatenated together
3013          * (payload data will be in another buffer).
3014          * Size of this varies, due to varying MAC header length.
3015          * If end is not dword aligned, we'll have 2 extra bytes at the end
3016          * of the MAC header (device reads on dword boundaries).
3017          * We'll tell device about this padding later.
3018          */
3019         len = priv->hw_setting.tx_cmd_len +
3020                 sizeof(struct iwl4965_cmd_header) + hdr_len;
3021
3022         len_org = len;
3023         len = (len + 3) & ~3;
3024
3025         if (len_org != len)
3026                 len_org = 1;
3027         else
3028                 len_org = 0;
3029
3030         /* Physical address of this Tx command's header (not MAC header!),
3031          * within command buffer array. */
3032         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl4965_cmd) * idx +
3033                      offsetof(struct iwl4965_cmd, hdr);
3034
3035         /* Add buffer containing Tx command and MAC(!) header to TFD's
3036          * first entry */
3037         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
3038
3039         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
3040                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
3041
3042         /* Set up TFD's 2nd entry to point directly to remainder of skb,
3043          * if any (802.11 null frames have no payload). */
3044         len = skb->len - hdr_len;
3045         if (len) {
3046                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
3047                                            len, PCI_DMA_TODEVICE);
3048                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
3049         }
3050
3051         /* Tell 4965 about any 2-byte padding after MAC header */
3052         if (len_org)
3053                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
3054
3055         /* Total # bytes to be transmitted */
3056         len = (u16)skb->len;
3057         out_cmd->cmd.tx.len = cpu_to_le16(len);
3058
3059         /* TODO need this for burst mode later on */
3060         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
3061
3062         /* set is_hcca to 0; it probably will never be implemented */
3063         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
3064
3065         scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
3066                 offsetof(struct iwl4965_tx_cmd, scratch);
3067         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
3068         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
3069
3070         if (!ieee80211_get_morefrag(hdr)) {
3071                 txq->need_update = 1;
3072                 if (qc) {
3073                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
3074                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
3075                 }
3076         } else {
3077                 wait_write_ptr = 1;
3078                 txq->need_update = 0;
3079         }
3080
3081         iwl4965_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
3082                            sizeof(out_cmd->cmd.tx));
3083
3084         iwl4965_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
3085                            ieee80211_get_hdrlen(fc));
3086
3087         /* Set up entry for this TFD in Tx byte-count array */
3088         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
3089
3090         /* Tell device the write index *just past* this latest filled TFD */
3091         q->write_ptr = iwl4965_queue_inc_wrap(q->write_ptr, q->n_bd);
3092         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
3093         spin_unlock_irqrestore(&priv->lock, flags);
3094
3095         if (rc)
3096                 return rc;
3097
3098         if ((iwl4965_queue_space(q) < q->high_mark)
3099             && priv->mac80211_registered) {
3100                 if (wait_write_ptr) {
3101                         spin_lock_irqsave(&priv->lock, flags);
3102                         txq->need_update = 1;
3103                         iwl4965_tx_queue_update_write_ptr(priv, txq);
3104                         spin_unlock_irqrestore(&priv->lock, flags);
3105                 }
3106
3107                 ieee80211_stop_queue(priv->hw, ctl->queue);
3108         }
3109
3110         return 0;
3111
3112 drop_unlock:
3113         spin_unlock_irqrestore(&priv->lock, flags);
3114 drop:
3115         return -1;
3116 }
3117
3118 static void iwl4965_set_rate(struct iwl4965_priv *priv)
3119 {
3120         const struct ieee80211_supported_band *hw = NULL;
3121         struct ieee80211_rate *rate;
3122         int i;
3123
3124         hw = iwl4965_get_hw_mode(priv, priv->band);
3125         if (!hw) {
3126                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3127                 return;
3128         }
3129
3130         priv->active_rate = 0;
3131         priv->active_rate_basic = 0;
3132
3133         for (i = 0; i < hw->n_bitrates; i++) {
3134                 rate = &(hw->bitrates[i]);
3135                 if (rate->hw_value < IWL_RATE_COUNT)
3136                         priv->active_rate |= (1 << rate->hw_value);
3137         }
3138
3139         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3140                        priv->active_rate, priv->active_rate_basic);
3141
3142         /*
3143          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3144          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3145          * OFDM
3146          */
3147         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3148                 priv->staging_rxon.cck_basic_rates =
3149                     ((priv->active_rate_basic &
3150                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3151         else
3152                 priv->staging_rxon.cck_basic_rates =
3153                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3154
3155         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3156                 priv->staging_rxon.ofdm_basic_rates =
3157                     ((priv->active_rate_basic &
3158                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3159                       IWL_FIRST_OFDM_RATE) & 0xFF;
3160         else
3161                 priv->staging_rxon.ofdm_basic_rates =
3162                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3163 }
3164
3165 static void iwl4965_radio_kill_sw(struct iwl4965_priv *priv, int disable_radio)
3166 {
3167         unsigned long flags;
3168
3169         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3170                 return;
3171
3172         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3173                           disable_radio ? "OFF" : "ON");
3174
3175         if (disable_radio) {
3176                 iwl4965_scan_cancel(priv);
3177                 /* FIXME: This is a workaround for AP */
3178                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3179                         spin_lock_irqsave(&priv->lock, flags);
3180                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
3181                                     CSR_UCODE_SW_BIT_RFKILL);
3182                         spin_unlock_irqrestore(&priv->lock, flags);
3183                         iwl4965_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3184                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3185                 }
3186                 return;
3187         }
3188
3189         spin_lock_irqsave(&priv->lock, flags);
3190         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3191
3192         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3193         spin_unlock_irqrestore(&priv->lock, flags);
3194
3195         /* wake up ucode */
3196         msleep(10);
3197
3198         spin_lock_irqsave(&priv->lock, flags);
3199         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
3200         if (!iwl4965_grab_nic_access(priv))
3201                 iwl4965_release_nic_access(priv);
3202         spin_unlock_irqrestore(&priv->lock, flags);
3203
3204         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3205                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3206                                   "disabled by HW switch\n");
3207                 return;
3208         }
3209
3210         queue_work(priv->workqueue, &priv->restart);
3211         return;
3212 }
3213
3214 void iwl4965_set_decrypted_flag(struct iwl4965_priv *priv, struct sk_buff *skb,
3215                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3216 {
3217         u16 fc =
3218             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3219
3220         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3221                 return;
3222
3223         if (!(fc & IEEE80211_FCTL_PROTECTED))
3224                 return;
3225
3226         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3227         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3228         case RX_RES_STATUS_SEC_TYPE_TKIP:
3229                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3230                     RX_RES_STATUS_BAD_ICV_MIC)
3231                         stats->flag |= RX_FLAG_MMIC_ERROR;
3232         case RX_RES_STATUS_SEC_TYPE_WEP:
3233         case RX_RES_STATUS_SEC_TYPE_CCMP:
3234                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3235                     RX_RES_STATUS_DECRYPT_OK) {
3236                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3237                         stats->flag |= RX_FLAG_DECRYPTED;
3238                 }
3239                 break;
3240
3241         default:
3242                 break;
3243         }
3244 }
3245
3246
3247 #define IWL_PACKET_RETRY_TIME HZ
3248
3249 int iwl4965_is_duplicate_packet(struct iwl4965_priv *priv, struct ieee80211_hdr *header)
3250 {
3251         u16 sc = le16_to_cpu(header->seq_ctrl);
3252         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3253         u16 frag = sc & IEEE80211_SCTL_FRAG;
3254         u16 *last_seq, *last_frag;
3255         unsigned long *last_time;
3256
3257         switch (priv->iw_mode) {
3258         case IEEE80211_IF_TYPE_IBSS:{
3259                 struct list_head *p;
3260                 struct iwl4965_ibss_seq *entry = NULL;
3261                 u8 *mac = header->addr2;
3262                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3263
3264                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3265                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
3266                         if (!compare_ether_addr(entry->mac, mac))
3267                                 break;
3268                 }
3269                 if (p == &priv->ibss_mac_hash[index]) {
3270                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3271                         if (!entry) {
3272                                 IWL_ERROR("Cannot malloc new mac entry\n");
3273                                 return 0;
3274                         }
3275                         memcpy(entry->mac, mac, ETH_ALEN);
3276                         entry->seq_num = seq;
3277                         entry->frag_num = frag;
3278                         entry->packet_time = jiffies;
3279                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
3280                         return 0;
3281                 }
3282                 last_seq = &entry->seq_num;
3283                 last_frag = &entry->frag_num;
3284                 last_time = &entry->packet_time;
3285                 break;
3286         }
3287         case IEEE80211_IF_TYPE_STA:
3288                 last_seq = &priv->last_seq_num;
3289                 last_frag = &priv->last_frag_num;
3290                 last_time = &priv->last_packet_time;
3291                 break;
3292         default:
3293                 return 0;
3294         }
3295         if ((*last_seq == seq) &&
3296             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3297                 if (*last_frag == frag)
3298                         goto drop;
3299                 if (*last_frag + 1 != frag)
3300                         /* out-of-order fragment */
3301                         goto drop;
3302         } else
3303                 *last_seq = seq;
3304
3305         *last_frag = frag;
3306         *last_time = jiffies;
3307         return 0;
3308
3309  drop:
3310         return 1;
3311 }
3312
3313 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3314
3315 #include "iwl-spectrum.h"
3316
3317 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3318 #define BEACON_TIME_MASK_HIGH   0xFF000000
3319 #define TIME_UNIT               1024
3320
3321 /*
3322  * extended beacon time format
3323  * time in usec will be changed into a 32-bit value in 8:24 format
3324  * the high 1 byte is the beacon counts
3325  * the lower 3 bytes is the time in usec within one beacon interval
3326  */
3327
3328 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
3329 {
3330         u32 quot;
3331         u32 rem;
3332         u32 interval = beacon_interval * 1024;
3333
3334         if (!interval || !usec)
3335                 return 0;
3336
3337         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3338         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3339
3340         return (quot << 24) + rem;
3341 }
3342
3343 /* base is usually what we get from ucode with each received frame,
3344  * the same as HW timer counter counting down
3345  */
3346
3347 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3348 {
3349         u32 base_low = base & BEACON_TIME_MASK_LOW;
3350         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3351         u32 interval = beacon_interval * TIME_UNIT;
3352         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3353             (addon & BEACON_TIME_MASK_HIGH);
3354
3355         if (base_low > addon_low)
3356                 res += base_low - addon_low;
3357         else if (base_low < addon_low) {
3358                 res += interval + base_low - addon_low;
3359                 res += (1 << 24);
3360         } else
3361                 res += (1 << 24);
3362
3363         return cpu_to_le32(res);
3364 }
3365
3366 static int iwl4965_get_measurement(struct iwl4965_priv *priv,
3367                                struct ieee80211_measurement_params *params,
3368                                u8 type)
3369 {
3370         struct iwl4965_spectrum_cmd spectrum;
3371         struct iwl4965_rx_packet *res;
3372         struct iwl4965_host_cmd cmd = {
3373                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3374                 .data = (void *)&spectrum,
3375                 .meta.flags = CMD_WANT_SKB,
3376         };
3377         u32 add_time = le64_to_cpu(params->start_time);
3378         int rc;
3379         int spectrum_resp_status;
3380         int duration = le16_to_cpu(params->duration);
3381
3382         if (iwl4965_is_associated(priv))
3383                 add_time =
3384                     iwl4965_usecs_to_beacons(
3385                         le64_to_cpu(params->start_time) - priv->last_tsf,
3386                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3387
3388         memset(&spectrum, 0, sizeof(spectrum));
3389
3390         spectrum.channel_count = cpu_to_le16(1);
3391         spectrum.flags =
3392             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3393         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3394         cmd.len = sizeof(spectrum);
3395         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3396
3397         if (iwl4965_is_associated(priv))
3398                 spectrum.start_time =
3399                     iwl4965_add_beacon_time(priv->last_beacon_time,
3400                                 add_time,
3401                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3402         else
3403                 spectrum.start_time = 0;
3404
3405         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3406         spectrum.channels[0].channel = params->channel;
3407         spectrum.channels[0].type = type;
3408         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3409                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3410                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3411
3412         rc = iwl4965_send_cmd_sync(priv, &cmd);
3413         if (rc)
3414                 return rc;
3415
3416         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
3417         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3418                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3419                 rc = -EIO;
3420         }
3421
3422         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3423         switch (spectrum_resp_status) {
3424         case 0:         /* Command will be handled */
3425                 if (res->u.spectrum.id != 0xff) {
3426                         IWL_DEBUG_INFO
3427                             ("Replaced existing measurement: %d\n",
3428                              res->u.spectrum.id);
3429                         priv->measurement_status &= ~MEASUREMENT_READY;
3430                 }
3431                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3432                 rc = 0;
3433                 break;
3434
3435         case 1:         /* Command will not be handled */
3436                 rc = -EAGAIN;
3437                 break;
3438         }
3439
3440         dev_kfree_skb_any(cmd.meta.u.skb);
3441
3442         return rc;
3443 }
3444 #endif
3445
3446 static void iwl4965_txstatus_to_ieee(struct iwl4965_priv *priv,
3447                                  struct iwl4965_tx_info *tx_sta)
3448 {
3449
3450         tx_sta->status.ack_signal = 0;
3451         tx_sta->status.excessive_retries = 0;
3452         tx_sta->status.queue_length = 0;
3453         tx_sta->status.queue_number = 0;
3454
3455         if (in_interrupt())
3456                 ieee80211_tx_status_irqsafe(priv->hw,
3457                                             tx_sta->skb[0], &(tx_sta->status));
3458         else
3459                 ieee80211_tx_status(priv->hw,
3460                                     tx_sta->skb[0], &(tx_sta->status));
3461
3462         tx_sta->skb[0] = NULL;
3463 }
3464
3465 /**
3466  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
3467  *
3468  * When FW advances 'R' index, all entries between old and new 'R' index
3469  * need to be reclaimed. As result, some free space forms.  If there is
3470  * enough free space (> low mark), wake the stack that feeds us.
3471  */
3472 int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index)
3473 {
3474         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3475         struct iwl4965_queue *q = &txq->q;
3476         int nfreed = 0;
3477
3478         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3479                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3480                           "is out of range [0-%d] %d %d.\n", txq_id,
3481                           index, q->n_bd, q->write_ptr, q->read_ptr);
3482                 return 0;
3483         }
3484
3485         for (index = iwl4965_queue_inc_wrap(index, q->n_bd);
3486                 q->read_ptr != index;
3487                 q->read_ptr = iwl4965_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3488                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3489                         iwl4965_txstatus_to_ieee(priv,
3490                                         &(txq->txb[txq->q.read_ptr]));
3491                         iwl4965_hw_txq_free_tfd(priv, txq);
3492                 } else if (nfreed > 1) {
3493                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3494                                         q->write_ptr, q->read_ptr);
3495                         queue_work(priv->workqueue, &priv->restart);
3496                 }
3497                 nfreed++;
3498         }
3499
3500 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3501                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3502                         priv->mac80211_registered)
3503                 ieee80211_wake_queue(priv->hw, txq_id); */
3504
3505
3506         return nfreed;
3507 }
3508
3509 static int iwl4965_is_tx_success(u32 status)
3510 {
3511         status &= TX_STATUS_MSK;
3512         return (status == TX_STATUS_SUCCESS)
3513             || (status == TX_STATUS_DIRECT_DONE);
3514 }
3515
3516 /******************************************************************************
3517  *
3518  * Generic RX handler implementations
3519  *
3520  ******************************************************************************/
3521 #ifdef CONFIG_IWL4965_HT
3522
3523 static inline int iwl4965_get_ra_sta_id(struct iwl4965_priv *priv,
3524                                     struct ieee80211_hdr *hdr)
3525 {
3526         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3527                 return IWL_AP_ID;
3528         else {
3529                 u8 *da = ieee80211_get_DA(hdr);
3530                 return iwl4965_hw_find_station(priv, da);
3531         }
3532 }
3533
3534 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
3535         struct iwl4965_priv *priv, int txq_id, int idx)
3536 {
3537         if (priv->txq[txq_id].txb[idx].skb[0])
3538                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3539                                 txb[idx].skb[0]->data;
3540         return NULL;
3541 }
3542
3543 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
3544 {
3545         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3546                                 tx_resp->frame_count);
3547         return le32_to_cpu(*scd_ssn) & MAX_SN;
3548
3549 }
3550
3551 /**
3552  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
3553  */
3554 static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
3555                                       struct iwl4965_ht_agg *agg,
3556                                       struct iwl4965_tx_resp_agg *tx_resp,
3557                                       u16 start_idx)
3558 {
3559         u16 status;
3560         struct agg_tx_status *frame_status = &tx_resp->status;
3561         struct ieee80211_tx_status *tx_status = NULL;
3562         struct ieee80211_hdr *hdr = NULL;
3563         int i, sh;
3564         int txq_id, idx;
3565         u16 seq;
3566
3567         if (agg->wait_for_ba)
3568                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
3569
3570         agg->frame_count = tx_resp->frame_count;
3571         agg->start_idx = start_idx;
3572         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3573         agg->bitmap = 0;
3574
3575         /* # frames attempted by Tx command */
3576         if (agg->frame_count == 1) {
3577                 /* Only one frame was attempted; no block-ack will arrive */
3578                 status = le16_to_cpu(frame_status[0].status);
3579                 seq  = le16_to_cpu(frame_status[0].sequence);
3580                 idx = SEQ_TO_INDEX(seq);
3581                 txq_id = SEQ_TO_QUEUE(seq);
3582
3583                 /* FIXME: code repetition */
3584                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3585                                    agg->frame_count, agg->start_idx, idx);
3586
3587                 tx_status = &(priv->txq[txq_id].txb[idx].status);
3588                 tx_status->retry_count = tx_resp->failure_frame;
3589                 tx_status->queue_number = status & 0xff;
3590                 tx_status->queue_length = tx_resp->failure_rts;
3591                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
3592                 tx_status->flags = iwl4965_is_tx_success(status)?
3593                         IEEE80211_TX_STATUS_ACK : 0;
3594                 /* FIXME Wrong Rate
3595                 tx_status->control.tx_rate =
3596                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags); */
3597                 /* FIXME: code repetition end */
3598
3599                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3600                                     status & 0xff, tx_resp->failure_frame);
3601                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3602                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3603
3604                 agg->wait_for_ba = 0;
3605         } else {
3606                 /* Two or more frames were attempted; expect block-ack */
3607                 u64 bitmap = 0;
3608                 int start = agg->start_idx;
3609
3610                 /* Construct bit-map of pending frames within Tx window */
3611                 for (i = 0; i < agg->frame_count; i++) {
3612                         u16 sc;
3613                         status = le16_to_cpu(frame_status[i].status);
3614                         seq  = le16_to_cpu(frame_status[i].sequence);
3615                         idx = SEQ_TO_INDEX(seq);
3616                         txq_id = SEQ_TO_QUEUE(seq);
3617
3618                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3619                                       AGG_TX_STATE_ABORT_MSK))
3620                                 continue;
3621
3622                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3623                                            agg->frame_count, txq_id, idx);
3624
3625                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3626
3627                         sc = le16_to_cpu(hdr->seq_ctrl);
3628                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3629                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3630                                           " idx=%d, seq_idx=%d, seq=%d\n",
3631                                           idx, SEQ_TO_SN(sc),
3632                                           hdr->seq_ctrl);
3633                                 return -1;
3634                         }
3635
3636                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3637                                            i, idx, SEQ_TO_SN(sc));
3638
3639                         sh = idx - start;
3640                         if (sh > 64) {
3641                                 sh = (start - idx) + 0xff;
3642                                 bitmap = bitmap << sh;
3643                                 sh = 0;
3644                                 start = idx;
3645                         } else if (sh < -64)
3646                                 sh  = 0xff - (start - idx);
3647                         else if (sh < 0) {
3648                                 sh = start - idx;
3649                                 start = idx;
3650                                 bitmap = bitmap << sh;
3651                                 sh = 0;
3652                         }
3653                         bitmap |= (1 << sh);
3654                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3655                                            start, (u32)(bitmap & 0xFFFFFFFF));
3656                 }
3657
3658                 agg->bitmap = bitmap;
3659                 agg->start_idx = start;
3660                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3661                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3662                                    agg->frame_count, agg->start_idx,
3663                                    agg->bitmap);
3664
3665                 if (bitmap)
3666                         agg->wait_for_ba = 1;
3667         }
3668         return 0;
3669 }
3670 #endif
3671
3672 /**
3673  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3674  */
3675 static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
3676                             struct iwl4965_rx_mem_buffer *rxb)
3677 {
3678         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3679         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3680         int txq_id = SEQ_TO_QUEUE(sequence);
3681         int index = SEQ_TO_INDEX(sequence);
3682         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3683         struct ieee80211_tx_status *tx_status;
3684         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3685         u32  status = le32_to_cpu(tx_resp->status);
3686 #ifdef CONFIG_IWL4965_HT
3687         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3688         struct ieee80211_hdr *hdr;
3689         __le16 *qc;
3690 #endif
3691
3692         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3693                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3694                           "is out of range [0-%d] %d %d\n", txq_id,
3695                           index, txq->q.n_bd, txq->q.write_ptr,
3696                           txq->q.read_ptr);
3697                 return;
3698         }
3699
3700 #ifdef CONFIG_IWL4965_HT
3701         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3702         qc = ieee80211_get_qos_ctrl(hdr);
3703
3704         if (qc)
3705                 tid = le16_to_cpu(*qc) & 0xf;
3706
3707         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3708         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3709                 IWL_ERROR("Station not known\n");
3710                 return;
3711         }
3712
3713         if (txq->sched_retry) {
3714                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3715                 struct iwl4965_ht_agg *agg = NULL;
3716
3717                 if (!qc)
3718                         return;
3719
3720                 agg = &priv->stations[sta_id].tid[tid].agg;
3721
3722                 iwl4965_tx_status_reply_tx(priv, agg,
3723                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3724
3725                 if ((tx_resp->frame_count == 1) &&
3726                     !iwl4965_is_tx_success(status)) {
3727                         /* TODO: send BAR */
3728                 }
3729
3730                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3731                         int freed;
3732                         index = iwl4965_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3733                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3734                                            "%d index %d\n", scd_ssn , index);
3735                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3736                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3737
3738                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3739                             txq_id >= 0 && priv->mac80211_registered &&
3740                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3741                                 ieee80211_wake_queue(priv->hw, txq_id);
3742
3743                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3744                 }
3745         } else {
3746 #endif /* CONFIG_IWL4965_HT */
3747         tx_status = &(txq->txb[txq->q.read_ptr].status);
3748
3749         tx_status->retry_count = tx_resp->failure_frame;
3750         tx_status->queue_number = status;
3751         tx_status->queue_length = tx_resp->bt_kill_count;
3752         tx_status->queue_length |= tx_resp->failure_rts;
3753
3754         tx_status->flags =
3755             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3756
3757         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3758                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3759                      status, le32_to_cpu(tx_resp->rate_n_flags),
3760                      tx_resp->failure_frame);
3761
3762         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3763         if (index != -1) {
3764                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3765 #ifdef CONFIG_IWL4965_HT
3766                 if (tid != MAX_TID_COUNT)
3767                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3768                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3769                         (txq_id >= 0) &&
3770                         priv->mac80211_registered)
3771                         ieee80211_wake_queue(priv->hw, txq_id);
3772                 if (tid != MAX_TID_COUNT)
3773                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3774 #endif
3775         }
3776 #ifdef CONFIG_IWL4965_HT
3777         }
3778 #endif /* CONFIG_IWL4965_HT */
3779
3780         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3781                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3782 }
3783
3784
3785 static void iwl4965_rx_reply_alive(struct iwl4965_priv *priv,
3786                                struct iwl4965_rx_mem_buffer *rxb)
3787 {
3788         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3789         struct iwl4965_alive_resp *palive;
3790         struct delayed_work *pwork;
3791
3792         palive = &pkt->u.alive_frame;
3793
3794         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3795                        "0x%01X 0x%01X\n",
3796                        palive->is_valid, palive->ver_type,
3797                        palive->ver_subtype);
3798
3799         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3800                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3801                 memcpy(&priv->card_alive_init,
3802                        &pkt->u.alive_frame,
3803                        sizeof(struct iwl4965_init_alive_resp));
3804                 pwork = &priv->init_alive_start;
3805         } else {
3806                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3807                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3808                        sizeof(struct iwl4965_alive_resp));
3809                 pwork = &priv->alive_start;
3810         }
3811
3812         /* We delay the ALIVE response by 5ms to
3813          * give the HW RF Kill time to activate... */
3814         if (palive->is_valid == UCODE_VALID_OK)
3815                 queue_delayed_work(priv->workqueue, pwork,
3816                                    msecs_to_jiffies(5));
3817         else
3818                 IWL_WARNING("uCode did not respond OK.\n");
3819 }
3820
3821 static void iwl4965_rx_reply_add_sta(struct iwl4965_priv *priv,
3822                                  struct iwl4965_rx_mem_buffer *rxb)
3823 {
3824         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3825
3826         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3827         return;
3828 }
3829
3830 static void iwl4965_rx_reply_error(struct iwl4965_priv *priv,
3831                                struct iwl4965_rx_mem_buffer *rxb)
3832 {
3833         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3834
3835         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3836                 "seq 0x%04X ser 0x%08X\n",
3837                 le32_to_cpu(pkt->u.err_resp.error_type),
3838                 get_cmd_string(pkt->u.err_resp.cmd_id),
3839                 pkt->u.err_resp.cmd_id,
3840                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3841                 le32_to_cpu(pkt->u.err_resp.error_info));
3842 }
3843
3844 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3845
3846 static void iwl4965_rx_csa(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3847 {
3848         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3849         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3850         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3851         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3852                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3853         rxon->channel = csa->channel;
3854         priv->staging_rxon.channel = csa->channel;
3855 }
3856
3857 static void iwl4965_rx_spectrum_measure_notif(struct iwl4965_priv *priv,
3858                                           struct iwl4965_rx_mem_buffer *rxb)
3859 {
3860 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3861         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3862         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3863
3864         if (!report->state) {
3865                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3866                           "Spectrum Measure Notification: Start\n");
3867                 return;
3868         }
3869
3870         memcpy(&priv->measure_report, report, sizeof(*report));
3871         priv->measurement_status |= MEASUREMENT_READY;
3872 #endif
3873 }
3874
3875 static void iwl4965_rx_pm_sleep_notif(struct iwl4965_priv *priv,
3876                                   struct iwl4965_rx_mem_buffer *rxb)
3877 {
3878 #ifdef CONFIG_IWL4965_DEBUG
3879         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3880         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3881         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3882                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3883 #endif
3884 }
3885
3886 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl4965_priv *priv,
3887                                              struct iwl4965_rx_mem_buffer *rxb)
3888 {
3889         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3890         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3891                         "notification for %s:\n",
3892                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3893         iwl4965_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3894 }
3895
3896 static void iwl4965_bg_beacon_update(struct work_struct *work)
3897 {
3898         struct iwl4965_priv *priv =
3899                 container_of(work, struct iwl4965_priv, beacon_update);
3900         struct sk_buff *beacon;
3901
3902         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3903         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3904
3905         if (!beacon) {
3906                 IWL_ERROR("update beacon failed\n");
3907                 return;
3908         }
3909
3910         mutex_lock(&priv->mutex);
3911         /* new beacon skb is allocated every time; dispose previous.*/
3912         if (priv->ibss_beacon)
3913                 dev_kfree_skb(priv->ibss_beacon);
3914
3915         priv->ibss_beacon = beacon;
3916         mutex_unlock(&priv->mutex);
3917
3918         iwl4965_send_beacon_cmd(priv);
3919 }
3920
3921 static void iwl4965_rx_beacon_notif(struct iwl4965_priv *priv,
3922                                 struct iwl4965_rx_mem_buffer *rxb)
3923 {
3924 #ifdef CONFIG_IWL4965_DEBUG
3925         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3926         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3927         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3928
3929         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3930                 "tsf %d %d rate %d\n",
3931                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3932                 beacon->beacon_notify_hdr.failure_frame,
3933                 le32_to_cpu(beacon->ibss_mgr_status),
3934                 le32_to_cpu(beacon->high_tsf),
3935                 le32_to_cpu(beacon->low_tsf), rate);
3936 #endif
3937
3938         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3939             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3940                 queue_work(priv->workqueue, &priv->beacon_update);
3941 }
3942
3943 /* Service response to REPLY_SCAN_CMD (0x80) */
3944 static void iwl4965_rx_reply_scan(struct iwl4965_priv *priv,
3945                               struct iwl4965_rx_mem_buffer *rxb)
3946 {
3947 #ifdef CONFIG_IWL4965_DEBUG
3948         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3949         struct iwl4965_scanreq_notification *notif =
3950             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3951
3952         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3953 #endif
3954 }
3955
3956 /* Service SCAN_START_NOTIFICATION (0x82) */
3957 static void iwl4965_rx_scan_start_notif(struct iwl4965_priv *priv,
3958                                     struct iwl4965_rx_mem_buffer *rxb)
3959 {
3960         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3961         struct iwl4965_scanstart_notification *notif =
3962             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3963         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3964         IWL_DEBUG_SCAN("Scan start: "
3965                        "%d [802.11%s] "
3966                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3967                        notif->channel,
3968                        notif->band ? "bg" : "a",
3969                        notif->tsf_high,
3970                        notif->tsf_low, notif->status, notif->beacon_timer);
3971 }
3972
3973 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3974 static void iwl4965_rx_scan_results_notif(struct iwl4965_priv *priv,
3975                                       struct iwl4965_rx_mem_buffer *rxb)
3976 {
3977         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3978         struct iwl4965_scanresults_notification *notif =
3979             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3980
3981         IWL_DEBUG_SCAN("Scan ch.res: "
3982                        "%d [802.11%s] "
3983                        "(TSF: 0x%08X:%08X) - %d "
3984                        "elapsed=%lu usec (%dms since last)\n",
3985                        notif->channel,
3986                        notif->band ? "bg" : "a",
3987                        le32_to_cpu(notif->tsf_high),
3988                        le32_to_cpu(notif->tsf_low),
3989                        le32_to_cpu(notif->statistics[0]),
3990                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3991                        jiffies_to_msecs(elapsed_jiffies
3992                                         (priv->last_scan_jiffies, jiffies)));
3993
3994         priv->last_scan_jiffies = jiffies;
3995         priv->next_scan_jiffies = 0;
3996 }
3997
3998 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3999 static void iwl4965_rx_scan_complete_notif(struct iwl4965_priv *priv,
4000                                        struct iwl4965_rx_mem_buffer *rxb)
4001 {
4002         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4003         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
4004
4005         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
4006                        scan_notif->scanned_channels,
4007                        scan_notif->tsf_low,
4008                        scan_notif->tsf_high, scan_notif->status);
4009
4010         /* The HW is no longer scanning */
4011         clear_bit(STATUS_SCAN_HW, &priv->status);
4012
4013         /* The scan completion notification came in, so kill that timer... */
4014         cancel_delayed_work(&priv->scan_check);
4015
4016         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
4017                        (priv->scan_bands == 2) ? "2.4" : "5.2",
4018                        jiffies_to_msecs(elapsed_jiffies
4019                                         (priv->scan_pass_start, jiffies)));
4020
4021         /* Remove this scanned band from the list
4022          * of pending bands to scan */
4023         priv->scan_bands--;
4024
4025         /* If a request to abort was given, or the scan did not succeed
4026          * then we reset the scan state machine and terminate,
4027          * re-queuing another scan if one has been requested */
4028         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
4029                 IWL_DEBUG_INFO("Aborted scan completed.\n");
4030                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
4031         } else {
4032                 /* If there are more bands on this scan pass reschedule */
4033                 if (priv->scan_bands > 0)
4034                         goto reschedule;
4035         }
4036
4037         priv->last_scan_jiffies = jiffies;
4038         priv->next_scan_jiffies = 0;
4039         IWL_DEBUG_INFO("Setting scan to off\n");
4040
4041         clear_bit(STATUS_SCANNING, &priv->status);
4042
4043         IWL_DEBUG_INFO("Scan took %dms\n",
4044                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4045
4046         queue_work(priv->workqueue, &priv->scan_completed);
4047
4048         return;
4049
4050 reschedule:
4051         priv->scan_pass_start = jiffies;
4052         queue_work(priv->workqueue, &priv->request_scan);
4053 }
4054
4055 /* Handle notification from uCode that card's power state is changing
4056  * due to software, hardware, or critical temperature RFKILL */
4057 static void iwl4965_rx_card_state_notif(struct iwl4965_priv *priv,
4058                                     struct iwl4965_rx_mem_buffer *rxb)
4059 {
4060         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4061         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4062         unsigned long status = priv->status;
4063
4064         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4065                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4066                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4067
4068         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4069                      RF_CARD_DISABLED)) {
4070
4071                 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4072                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4073
4074                 if (!iwl4965_grab_nic_access(priv)) {
4075                         iwl4965_write_direct32(
4076                                 priv, HBUS_TARG_MBX_C,
4077                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4078
4079                         iwl4965_release_nic_access(priv);
4080                 }
4081
4082                 if (!(flags & RXON_CARD_DISABLED)) {
4083                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4084                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4085                         if (!iwl4965_grab_nic_access(priv)) {
4086                                 iwl4965_write_direct32(
4087                                         priv, HBUS_TARG_MBX_C,
4088                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4089
4090                                 iwl4965_release_nic_access(priv);
4091                         }
4092                 }
4093
4094                 if (flags & RF_CARD_DISABLED) {
4095                         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_SET,
4096                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4097                         iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4098                         if (!iwl4965_grab_nic_access(priv))
4099                                 iwl4965_release_nic_access(priv);
4100                 }
4101         }
4102
4103         if (flags & HW_CARD_DISABLED)
4104                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4105         else
4106                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4107
4108
4109         if (flags & SW_CARD_DISABLED)
4110                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4111         else
4112                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4113
4114         if (!(flags & RXON_CARD_DISABLED))
4115                 iwl4965_scan_cancel(priv);
4116
4117         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4118              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4119             (test_bit(STATUS_RF_KILL_SW, &status) !=
4120              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4121                 queue_work(priv->workqueue, &priv->rf_kill);
4122         else
4123                 wake_up_interruptible(&priv->wait_command_queue);
4124 }
4125
4126 /**
4127  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
4128  *
4129  * Setup the RX handlers for each of the reply types sent from the uCode
4130  * to the host.
4131  *
4132  * This function chains into the hardware specific files for them to setup
4133  * any hardware specific handlers as well.
4134  */
4135 static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
4136 {
4137         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
4138         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
4139         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
4140         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
4141         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4142             iwl4965_rx_spectrum_measure_notif;
4143         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
4144         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4145             iwl4965_rx_pm_debug_statistics_notif;
4146         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
4147
4148         /*
4149          * The same handler is used for both the REPLY to a discrete
4150          * statistics request from the host as well as for the periodic
4151          * statistics notifications (after received beacons) from the uCode.
4152          */
4153         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
4154         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
4155
4156         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
4157         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
4158         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4159             iwl4965_rx_scan_results_notif;
4160         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4161             iwl4965_rx_scan_complete_notif;
4162         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
4163         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
4164
4165         /* Set up hardware specific Rx handlers */
4166         iwl4965_hw_rx_handler_setup(priv);
4167 }
4168
4169 /**
4170  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4171  * @rxb: Rx buffer to reclaim
4172  *
4173  * If an Rx buffer has an async callback associated with it the callback
4174  * will be executed.  The attached skb (if present) will only be freed
4175  * if the callback returns 1
4176  */
4177 static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
4178                                 struct iwl4965_rx_mem_buffer *rxb)
4179 {
4180         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4181         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4182         int txq_id = SEQ_TO_QUEUE(sequence);
4183         int index = SEQ_TO_INDEX(sequence);
4184         int huge = sequence & SEQ_HUGE_FRAME;
4185         int cmd_index;
4186         struct iwl4965_cmd *cmd;
4187
4188         /* If a Tx command is being handled and it isn't in the actual
4189          * command queue then there a command routing bug has been introduced
4190          * in the queue management code. */
4191         if (txq_id != IWL_CMD_QUEUE_NUM)
4192                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4193                           txq_id, pkt->hdr.cmd);
4194         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4195
4196         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4197         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4198
4199         /* Input error checking is done when commands are added to queue. */
4200         if (cmd->meta.flags & CMD_WANT_SKB) {
4201                 cmd->meta.source->u.skb = rxb->skb;
4202                 rxb->skb = NULL;
4203         } else if (cmd->meta.u.callback &&
4204                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4205                 rxb->skb = NULL;
4206
4207         iwl4965_tx_queue_reclaim(priv, txq_id, index);
4208
4209         if (!(cmd->meta.flags & CMD_ASYNC)) {
4210                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4211                 wake_up_interruptible(&priv->wait_command_queue);
4212         }
4213 }
4214
4215 /************************** RX-FUNCTIONS ****************************/
4216 /*
4217  * Rx theory of operation
4218  *
4219  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
4220  * each of which point to Receive Buffers to be filled by 4965.  These get
4221  * used not only for Rx frames, but for any command response or notification
4222  * from the 4965.  The driver and 4965 manage the Rx buffers by means
4223  * of indexes into the circular buffer.
4224  *
4225  * Rx Queue Indexes
4226  * The host/firmware share two index registers for managing the Rx buffers.
4227  *
4228  * The READ index maps to the first position that the firmware may be writing
4229  * to -- the driver can read up to (but not including) this position and get
4230  * good data.
4231  * The READ index is managed by the firmware once the card is enabled.
4232  *
4233  * The WRITE index maps to the last position the driver has read from -- the
4234  * position preceding WRITE is the last slot the firmware can place a packet.
4235  *
4236  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4237  * WRITE = READ.
4238  *
4239  * During initialization, the host sets up the READ queue position to the first
4240  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4241  *
4242  * When the firmware places a packet in a buffer, it will advance the READ index
4243  * and fire the RX interrupt.  The driver can then query the READ index and
4244  * process as many packets as possible, moving the WRITE index forward as it
4245  * resets the Rx queue buffers with new memory.
4246  *
4247  * The management in the driver is as follows:
4248  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4249  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4250  *   to replenish the iwl->rxq->rx_free.
4251  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
4252  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4253  *   'processed' and 'read' driver indexes as well)
4254  * + A received packet is processed and handed to the kernel network stack,
4255  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4256  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4257  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4258  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4259  *   were enough free buffers and RX_STALLED is set it is cleared.
4260  *
4261  *
4262  * Driver sequence:
4263  *
4264  * iwl4965_rx_queue_alloc()   Allocates rx_free
4265  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
4266  *                            iwl4965_rx_queue_restock
4267  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
4268  *                            queue, updates firmware pointers, and updates
4269  *                            the WRITE index.  If insufficient rx_free buffers
4270  *                            are available, schedules iwl4965_rx_replenish
4271  *
4272  * -- enable interrupts --
4273  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
4274  *                            READ INDEX, detaching the SKB from the pool.
4275  *                            Moves the packet buffer from queue to rx_used.
4276  *                            Calls iwl4965_rx_queue_restock to refill any empty
4277  *                            slots.
4278  * ...
4279  *
4280  */
4281
4282 /**
4283  * iwl4965_rx_queue_space - Return number of free slots available in queue.
4284  */
4285 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
4286 {
4287         int s = q->read - q->write;
4288         if (s <= 0)
4289                 s += RX_QUEUE_SIZE;
4290         /* keep some buffer to not confuse full and empty queue */
4291         s -= 2;
4292         if (s < 0)
4293                 s = 0;
4294         return s;
4295 }
4296
4297 /**
4298  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4299  */
4300 int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_rx_queue *q)
4301 {
4302         u32 reg = 0;
4303         int rc = 0;
4304         unsigned long flags;
4305
4306         spin_lock_irqsave(&q->lock, flags);
4307
4308         if (q->need_update == 0)
4309                 goto exit_unlock;
4310
4311         /* If power-saving is in use, make sure device is awake */
4312         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4313                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4314
4315                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4316                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4317                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4318                         goto exit_unlock;
4319                 }
4320
4321                 rc = iwl4965_grab_nic_access(priv);
4322                 if (rc)
4323                         goto exit_unlock;
4324
4325                 /* Device expects a multiple of 8 */
4326                 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
4327                                      q->write & ~0x7);
4328                 iwl4965_release_nic_access(priv);
4329
4330         /* Else device is assumed to be awake */
4331         } else
4332                 /* Device expects a multiple of 8 */
4333                 iwl4965_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4334
4335
4336         q->need_update = 0;
4337
4338  exit_unlock:
4339         spin_unlock_irqrestore(&q->lock, flags);
4340         return rc;
4341 }
4342
4343 /**
4344  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
4345  */
4346 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
4347                                           dma_addr_t dma_addr)
4348 {
4349         return cpu_to_le32((u32)(dma_addr >> 8));
4350 }
4351
4352
4353 /**
4354  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
4355  *
4356  * If there are slots in the RX queue that need to be restocked,
4357  * and we have free pre-allocated buffers, fill the ranks as much
4358  * as we can, pulling from rx_free.
4359  *
4360  * This moves the 'write' index forward to catch up with 'processed', and
4361  * also updates the memory address in the firmware to reference the new
4362  * target buffer.
4363  */
4364 static int iwl4965_rx_queue_restock(struct iwl4965_priv *priv)
4365 {
4366         struct iwl4965_rx_queue *rxq = &priv->rxq;
4367         struct list_head *element;
4368         struct iwl4965_rx_mem_buffer *rxb;
4369         unsigned long flags;
4370         int write, rc;
4371
4372         spin_lock_irqsave(&rxq->lock, flags);
4373         write = rxq->write & ~0x7;
4374         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4375                 /* Get next free Rx buffer, remove from free list */
4376                 element = rxq->rx_free.next;
4377                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4378                 list_del(element);
4379
4380                 /* Point to Rx buffer via next RBD in circular buffer */
4381                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4382                 rxq->queue[rxq->write] = rxb;
4383                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4384                 rxq->free_count--;
4385         }
4386         spin_unlock_irqrestore(&rxq->lock, flags);
4387         /* If the pre-allocated buffer pool is dropping low, schedule to
4388          * refill it */
4389         if (rxq->free_count <= RX_LOW_WATERMARK)
4390                 queue_work(priv->workqueue, &priv->rx_replenish);
4391
4392
4393         /* If we've added more space for the firmware to place data, tell it.
4394          * Increment device's write pointer in multiples of 8. */
4395         if ((write != (rxq->write & ~0x7))
4396             || (abs(rxq->write - rxq->read) > 7)) {
4397                 spin_lock_irqsave(&rxq->lock, flags);
4398                 rxq->need_update = 1;
4399                 spin_unlock_irqrestore(&rxq->lock, flags);
4400                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
4401                 if (rc)
4402                         return rc;
4403         }
4404
4405         return 0;
4406 }
4407
4408 /**
4409  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
4410  *
4411  * When moving to rx_free an SKB is allocated for the slot.
4412  *
4413  * Also restock the Rx queue via iwl4965_rx_queue_restock.
4414  * This is called as a scheduled work item (except for during initialization)
4415  */
4416 static void iwl4965_rx_allocate(struct iwl4965_priv *priv)
4417 {
4418         struct iwl4965_rx_queue *rxq = &priv->rxq;
4419         struct list_head *element;
4420         struct iwl4965_rx_mem_buffer *rxb;
4421         unsigned long flags;
4422         spin_lock_irqsave(&rxq->lock, flags);
4423         while (!list_empty(&rxq->rx_used)) {
4424                 element = rxq->rx_used.next;
4425                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
4426
4427                 /* Alloc a new receive buffer */
4428                 rxb->skb =
4429                     alloc_skb(priv->hw_setting.rx_buf_size,
4430                                 __GFP_NOWARN | GFP_ATOMIC);
4431                 if (!rxb->skb) {
4432                         if (net_ratelimit())
4433                                 printk(KERN_CRIT DRV_NAME
4434                                        ": Can not allocate SKB buffers\n");
4435                         /* We don't reschedule replenish work here -- we will
4436                          * call the restock method and if it still needs
4437                          * more buffers it will schedule replenish */
4438                         break;
4439                 }
4440                 priv->alloc_rxb_skb++;
4441                 list_del(element);
4442
4443                 /* Get physical address of RB/SKB */
4444                 rxb->dma_addr =
4445                     pci_map_single(priv->pci_dev, rxb->skb->data,
4446                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
4447                 list_add_tail(&rxb->list, &rxq->rx_free);
4448                 rxq->free_count++;
4449         }
4450         spin_unlock_irqrestore(&rxq->lock, flags);
4451 }
4452
4453 /*
4454  * this should be called while priv->lock is locked
4455 */
4456 static void __iwl4965_rx_replenish(void *data)
4457 {
4458         struct iwl4965_priv *priv = data;
4459
4460         iwl4965_rx_allocate(priv);
4461         iwl4965_rx_queue_restock(priv);
4462 }
4463
4464
4465 void iwl4965_rx_replenish(void *data)
4466 {
4467         struct iwl4965_priv *priv = data;
4468         unsigned long flags;
4469
4470         iwl4965_rx_allocate(priv);
4471
4472         spin_lock_irqsave(&priv->lock, flags);
4473         iwl4965_rx_queue_restock(priv);
4474         spin_unlock_irqrestore(&priv->lock, flags);
4475 }
4476
4477 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4478  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
4479  * This free routine walks the list of POOL entries and if SKB is set to
4480  * non NULL it is unmapped and freed
4481  */
4482 static void iwl4965_rx_queue_free(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4483 {
4484         int i;
4485         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4486                 if (rxq->pool[i].skb != NULL) {
4487                         pci_unmap_single(priv->pci_dev,
4488                                          rxq->pool[i].dma_addr,
4489                                          priv->hw_setting.rx_buf_size,
4490                                          PCI_DMA_FROMDEVICE);
4491                         dev_kfree_skb(rxq->pool[i].skb);
4492                 }
4493         }
4494
4495         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4496                             rxq->dma_addr);
4497         rxq->bd = NULL;
4498 }
4499
4500 int iwl4965_rx_queue_alloc(struct iwl4965_priv *priv)
4501 {
4502         struct iwl4965_rx_queue *rxq = &priv->rxq;
4503         struct pci_dev *dev = priv->pci_dev;
4504         int i;
4505
4506         spin_lock_init(&rxq->lock);
4507         INIT_LIST_HEAD(&rxq->rx_free);
4508         INIT_LIST_HEAD(&rxq->rx_used);
4509
4510         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
4511         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4512         if (!rxq->bd)
4513                 return -ENOMEM;
4514
4515         /* Fill the rx_used queue with _all_ of the Rx buffers */
4516         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4517                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4518
4519         /* Set us so that we have processed and used all buffers, but have
4520          * not restocked the Rx queue with fresh buffers */
4521         rxq->read = rxq->write = 0;
4522         rxq->free_count = 0;
4523         rxq->need_update = 0;
4524         return 0;
4525 }
4526
4527 void iwl4965_rx_queue_reset(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
4528 {
4529         unsigned long flags;
4530         int i;
4531         spin_lock_irqsave(&rxq->lock, flags);
4532         INIT_LIST_HEAD(&rxq->rx_free);
4533         INIT_LIST_HEAD(&rxq->rx_used);
4534         /* Fill the rx_used queue with _all_ of the Rx buffers */
4535         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4536                 /* In the reset function, these buffers may have been allocated
4537                  * to an SKB, so we need to unmap and free potential storage */
4538                 if (rxq->pool[i].skb != NULL) {
4539                         pci_unmap_single(priv->pci_dev,
4540                                          rxq->pool[i].dma_addr,
4541                                          priv->hw_setting.rx_buf_size,
4542                                          PCI_DMA_FROMDEVICE);
4543                         priv->alloc_rxb_skb--;
4544                         dev_kfree_skb(rxq->pool[i].skb);
4545                         rxq->pool[i].skb = NULL;
4546                 }
4547                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4548         }
4549
4550         /* Set us so that we have processed and used all buffers, but have
4551          * not restocked the Rx queue with fresh buffers */
4552         rxq->read = rxq->write = 0;
4553         rxq->free_count = 0;
4554         spin_unlock_irqrestore(&rxq->lock, flags);
4555 }
4556
4557 /* Convert linear signal-to-noise ratio into dB */
4558 static u8 ratio2dB[100] = {
4559 /*       0   1   2   3   4   5   6   7   8   9 */
4560          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4561         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4562         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4563         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4564         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4565         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4566         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4567         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4568         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4569         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4570 };
4571
4572 /* Calculates a relative dB value from a ratio of linear
4573  *   (i.e. not dB) signal levels.
4574  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4575 int iwl4965_calc_db_from_ratio(int sig_ratio)
4576 {
4577         /* 1000:1 or higher just report as 60 dB */
4578         if (sig_ratio >= 1000)
4579                 return 60;
4580
4581         /* 100:1 or higher, divide by 10 and use table,
4582          *   add 20 dB to make up for divide by 10 */
4583         if (sig_ratio >= 100)
4584                 return (20 + (int)ratio2dB[sig_ratio/10]);
4585
4586         /* We shouldn't see this */
4587         if (sig_ratio < 1)
4588                 return 0;
4589
4590         /* Use table for ratios 1:1 - 99:1 */
4591         return (int)ratio2dB[sig_ratio];
4592 }
4593
4594 #define PERFECT_RSSI (-20) /* dBm */
4595 #define WORST_RSSI (-95)   /* dBm */
4596 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4597
4598 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4599  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4600  *   about formulas used below. */
4601 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4602 {
4603         int sig_qual;
4604         int degradation = PERFECT_RSSI - rssi_dbm;
4605
4606         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4607          * as indicator; formula is (signal dbm - noise dbm).
4608          * SNR at or above 40 is a great signal (100%).
4609          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4610          * Weakest usable signal is usually 10 - 15 dB SNR. */
4611         if (noise_dbm) {
4612                 if (rssi_dbm - noise_dbm >= 40)
4613                         return 100;
4614                 else if (rssi_dbm < noise_dbm)
4615                         return 0;
4616                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4617
4618         /* Else use just the signal level.
4619          * This formula is a least squares fit of data points collected and
4620          *   compared with a reference system that had a percentage (%) display
4621          *   for signal quality. */
4622         } else
4623                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4624                             (15 * RSSI_RANGE + 62 * degradation)) /
4625                            (RSSI_RANGE * RSSI_RANGE);
4626
4627         if (sig_qual > 100)
4628                 sig_qual = 100;
4629         else if (sig_qual < 1)
4630                 sig_qual = 0;
4631
4632         return sig_qual;
4633 }
4634
4635 /**
4636  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4637  *
4638  * Uses the priv->rx_handlers callback function array to invoke
4639  * the appropriate handlers, including command responses,
4640  * frame-received notifications, and other notifications.
4641  */
4642 static void iwl4965_rx_handle(struct iwl4965_priv *priv)
4643 {
4644         struct iwl4965_rx_mem_buffer *rxb;
4645         struct iwl4965_rx_packet *pkt;
4646         struct iwl4965_rx_queue *rxq = &priv->rxq;
4647         u32 r, i;
4648         int reclaim;
4649         unsigned long flags;
4650         u8 fill_rx = 0;
4651         u32 count = 8;
4652
4653         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4654          * buffer that the driver may process (last buffer filled by ucode). */
4655         r = iwl4965_hw_get_rx_read(priv);
4656         i = rxq->read;
4657
4658         /* Rx interrupt, but nothing sent from uCode */
4659         if (i == r)
4660                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4661
4662         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4663                 fill_rx = 1;
4664
4665         while (i != r) {
4666                 rxb = rxq->queue[i];
4667
4668                 /* If an RXB doesn't have a Rx queue slot associated with it,
4669                  * then a bug has been introduced in the queue refilling
4670                  * routines -- catch it here */
4671                 BUG_ON(rxb == NULL);
4672
4673                 rxq->queue[i] = NULL;
4674
4675                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4676                                             priv->hw_setting.rx_buf_size,
4677                                             PCI_DMA_FROMDEVICE);
4678                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4679
4680                 /* Reclaim a command buffer only if this packet is a response
4681                  *   to a (driver-originated) command.
4682                  * If the packet (e.g. Rx frame) originated from uCode,
4683                  *   there is no command buffer to reclaim.
4684                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4685                  *   but apparently a few don't get set; catch them here. */
4686                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4687                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4688                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4689                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4690                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4691                         (pkt->hdr.cmd != REPLY_TX);
4692
4693                 /* Based on type of command response or notification,
4694                  *   handle those that need handling via function in
4695                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4696                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4697                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4698                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4699                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4700                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4701                 } else {
4702                         /* No handling needed */
4703                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4704                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4705                                 r, i, get_cmd_string(pkt->hdr.cmd),
4706                                 pkt->hdr.cmd);
4707                 }
4708
4709                 if (reclaim) {
4710                         /* Invoke any callbacks, transfer the skb to caller, and
4711                          * fire off the (possibly) blocking iwl4965_send_cmd()
4712                          * as we reclaim the driver command queue */
4713                         if (rxb && rxb->skb)
4714                                 iwl4965_tx_cmd_complete(priv, rxb);
4715                         else
4716                                 IWL_WARNING("Claim null rxb?\n");
4717                 }
4718
4719                 /* For now we just don't re-use anything.  We can tweak this
4720                  * later to try and re-use notification packets and SKBs that
4721                  * fail to Rx correctly */
4722                 if (rxb->skb != NULL) {
4723                         priv->alloc_rxb_skb--;
4724                         dev_kfree_skb_any(rxb->skb);
4725                         rxb->skb = NULL;
4726                 }
4727
4728                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4729                                  priv->hw_setting.rx_buf_size,
4730                                  PCI_DMA_FROMDEVICE);
4731                 spin_lock_irqsave(&rxq->lock, flags);
4732                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4733                 spin_unlock_irqrestore(&rxq->lock, flags);
4734                 i = (i + 1) & RX_QUEUE_MASK;
4735                 /* If there are a lot of unused frames,
4736                  * restock the Rx queue so ucode wont assert. */
4737                 if (fill_rx) {
4738                         count++;
4739                         if (count >= 8) {
4740                                 priv->rxq.read = i;
4741                                 __iwl4965_rx_replenish(priv);
4742                                 count = 0;
4743                         }
4744                 }
4745         }
4746
4747         /* Backtrack one entry */
4748         priv->rxq.read = i;
4749         iwl4965_rx_queue_restock(priv);
4750 }
4751
4752 /**
4753  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4754  */
4755 static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
4756                                   struct iwl4965_tx_queue *txq)
4757 {
4758         u32 reg = 0;
4759         int rc = 0;
4760         int txq_id = txq->q.id;
4761
4762         if (txq->need_update == 0)
4763                 return rc;
4764
4765         /* if we're trying to save power */
4766         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4767                 /* wake up nic if it's powered down ...
4768                  * uCode will wake up, and interrupt us again, so next
4769                  * time we'll skip this part. */
4770                 reg = iwl4965_read32(priv, CSR_UCODE_DRV_GP1);
4771
4772                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4773                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4774                         iwl4965_set_bit(priv, CSR_GP_CNTRL,
4775                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4776                         return rc;
4777                 }
4778
4779                 /* restore this queue's parameters in nic hardware. */
4780                 rc = iwl4965_grab_nic_access(priv);
4781                 if (rc)
4782                         return rc;
4783                 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
4784                                      txq->q.write_ptr | (txq_id << 8));
4785                 iwl4965_release_nic_access(priv);
4786
4787         /* else not in power-save mode, uCode will never sleep when we're
4788          * trying to tx (during RFKILL, we're not trying to tx). */
4789         } else
4790                 iwl4965_write32(priv, HBUS_TARG_WRPTR,
4791                             txq->q.write_ptr | (txq_id << 8));
4792
4793         txq->need_update = 0;
4794
4795         return rc;
4796 }
4797
4798 #ifdef CONFIG_IWL4965_DEBUG
4799 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4800 {
4801         DECLARE_MAC_BUF(mac);
4802
4803         IWL_DEBUG_RADIO("RX CONFIG:\n");
4804         iwl4965_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4805         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4806         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4807         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4808                         le32_to_cpu(rxon->filter_flags));
4809         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4810         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4811                         rxon->ofdm_basic_rates);
4812         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4813         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4814                         print_mac(mac, rxon->node_addr));
4815         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4816                         print_mac(mac, rxon->bssid_addr));
4817         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4818 }
4819 #endif
4820
4821 static void iwl4965_enable_interrupts(struct iwl4965_priv *priv)
4822 {
4823         IWL_DEBUG_ISR("Enabling interrupts\n");
4824         set_bit(STATUS_INT_ENABLED, &priv->status);
4825         iwl4965_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4826 }
4827
4828 static inline void iwl4965_disable_interrupts(struct iwl4965_priv *priv)
4829 {
4830         clear_bit(STATUS_INT_ENABLED, &priv->status);
4831
4832         /* disable interrupts from uCode/NIC to host */
4833         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
4834
4835         /* acknowledge/clear/reset any interrupts still pending
4836          * from uCode or flow handler (Rx/Tx DMA) */
4837         iwl4965_write32(priv, CSR_INT, 0xffffffff);
4838         iwl4965_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4839         IWL_DEBUG_ISR("Disabled interrupts\n");
4840 }
4841
4842 static const char *desc_lookup(int i)
4843 {
4844         switch (i) {
4845         case 1:
4846                 return "FAIL";
4847         case 2:
4848                 return "BAD_PARAM";
4849         case 3:
4850                 return "BAD_CHECKSUM";
4851         case 4:
4852                 return "NMI_INTERRUPT";
4853         case 5:
4854                 return "SYSASSERT";
4855         case 6:
4856                 return "FATAL_ERROR";
4857         }
4858
4859         return "UNKNOWN";
4860 }
4861
4862 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4863 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4864
4865 static void iwl4965_dump_nic_error_log(struct iwl4965_priv *priv)
4866 {
4867         u32 data2, line;
4868         u32 desc, time, count, base, data1;
4869         u32 blink1, blink2, ilink1, ilink2;
4870         int rc;
4871
4872         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4873
4874         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4875                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4876                 return;
4877         }
4878
4879         rc = iwl4965_grab_nic_access(priv);
4880         if (rc) {
4881                 IWL_WARNING("Can not read from adapter at this time.\n");
4882                 return;
4883         }
4884
4885         count = iwl4965_read_targ_mem(priv, base);
4886
4887         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4888                 IWL_ERROR("Start IWL Error Log Dump:\n");
4889                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4890                           priv->status, priv->config, count);
4891         }
4892
4893         desc = iwl4965_read_targ_mem(priv, base + 1 * sizeof(u32));
4894         blink1 = iwl4965_read_targ_mem(priv, base + 3 * sizeof(u32));
4895         blink2 = iwl4965_read_targ_mem(priv, base + 4 * sizeof(u32));
4896         ilink1 = iwl4965_read_targ_mem(priv, base + 5 * sizeof(u32));
4897         ilink2 = iwl4965_read_targ_mem(priv, base + 6 * sizeof(u32));
4898         data1 = iwl4965_read_targ_mem(priv, base + 7 * sizeof(u32));
4899         data2 = iwl4965_read_targ_mem(priv, base + 8 * sizeof(u32));
4900         line = iwl4965_read_targ_mem(priv, base + 9 * sizeof(u32));
4901         time = iwl4965_read_targ_mem(priv, base + 11 * sizeof(u32));
4902
4903         IWL_ERROR("Desc               Time       "
4904                   "data1      data2      line\n");
4905         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4906                   desc_lookup(desc), desc, time, data1, data2, line);
4907         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4908         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4909                   ilink1, ilink2);
4910
4911         iwl4965_release_nic_access(priv);
4912 }
4913
4914 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4915
4916 /**
4917  * iwl4965_print_event_log - Dump error event log to syslog
4918  *
4919  * NOTE: Must be called with iwl4965_grab_nic_access() already obtained!
4920  */
4921 static void iwl4965_print_event_log(struct iwl4965_priv *priv, u32 start_idx,
4922                                 u32 num_events, u32 mode)
4923 {
4924         u32 i;
4925         u32 base;       /* SRAM byte address of event log header */
4926         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4927         u32 ptr;        /* SRAM byte address of log data */
4928         u32 ev, time, data; /* event log data */
4929
4930         if (num_events == 0)
4931                 return;
4932
4933         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4934
4935         if (mode == 0)
4936                 event_size = 2 * sizeof(u32);
4937         else
4938                 event_size = 3 * sizeof(u32);
4939
4940         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4941
4942         /* "time" is actually "data" for mode 0 (no timestamp).
4943          * place event id # at far right for easier visual parsing. */
4944         for (i = 0; i < num_events; i++) {
4945                 ev = iwl4965_read_targ_mem(priv, ptr);
4946                 ptr += sizeof(u32);
4947                 time = iwl4965_read_targ_mem(priv, ptr);
4948                 ptr += sizeof(u32);
4949                 if (mode == 0)
4950                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4951                 else {
4952                         data = iwl4965_read_targ_mem(priv, ptr);
4953                         ptr += sizeof(u32);
4954                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4955                 }
4956         }
4957 }
4958
4959 static void iwl4965_dump_nic_event_log(struct iwl4965_priv *priv)
4960 {
4961         int rc;
4962         u32 base;       /* SRAM byte address of event log header */
4963         u32 capacity;   /* event log capacity in # entries */
4964         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4965         u32 num_wraps;  /* # times uCode wrapped to top of log */
4966         u32 next_entry; /* index of next entry to be written by uCode */
4967         u32 size;       /* # entries that we'll print */
4968
4969         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4970         if (!iwl4965_hw_valid_rtc_data_addr(base)) {
4971                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4972                 return;
4973         }
4974
4975         rc = iwl4965_grab_nic_access(priv);
4976         if (rc) {
4977                 IWL_WARNING("Can not read from adapter at this time.\n");
4978                 return;
4979         }
4980
4981         /* event log header */
4982         capacity = iwl4965_read_targ_mem(priv, base);
4983         mode = iwl4965_read_targ_mem(priv, base + (1 * sizeof(u32)));
4984         num_wraps = iwl4965_read_targ_mem(priv, base + (2 * sizeof(u32)));
4985         next_entry = iwl4965_read_targ_mem(priv, base + (3 * sizeof(u32)));
4986
4987         size = num_wraps ? capacity : next_entry;
4988
4989         /* bail out if nothing in log */
4990         if (size == 0) {
4991                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4992                 iwl4965_release_nic_access(priv);
4993                 return;
4994         }
4995
4996         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4997                   size, num_wraps);
4998
4999         /* if uCode has wrapped back to top of log, start at the oldest entry,
5000          * i.e the next one that uCode would fill. */
5001         if (num_wraps)
5002                 iwl4965_print_event_log(priv, next_entry,
5003                                     capacity - next_entry, mode);
5004
5005         /* (then/else) start at top of log */
5006         iwl4965_print_event_log(priv, 0, next_entry, mode);
5007
5008         iwl4965_release_nic_access(priv);
5009 }
5010
5011 /**
5012  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
5013  */
5014 static void iwl4965_irq_handle_error(struct iwl4965_priv *priv)
5015 {
5016         /* Set the FW error flag -- cleared on iwl4965_down */
5017         set_bit(STATUS_FW_ERROR, &priv->status);
5018
5019         /* Cancel currently queued command. */
5020         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
5021
5022 #ifdef CONFIG_IWL4965_DEBUG
5023         if (iwl4965_debug_level & IWL_DL_FW_ERRORS) {
5024                 iwl4965_dump_nic_error_log(priv);
5025                 iwl4965_dump_nic_event_log(priv);
5026                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
5027         }
5028 #endif
5029
5030         wake_up_interruptible(&priv->wait_command_queue);
5031
5032         /* Keep the restart process from trying to send host
5033          * commands by clearing the INIT status bit */
5034         clear_bit(STATUS_READY, &priv->status);
5035
5036         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5037                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
5038                           "Restarting adapter due to uCode error.\n");
5039
5040                 if (iwl4965_is_associated(priv)) {
5041                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
5042                                sizeof(priv->recovery_rxon));
5043                         priv->error_recovering = 1;
5044                 }
5045                 queue_work(priv->workqueue, &priv->restart);
5046         }
5047 }
5048
5049 static void iwl4965_error_recovery(struct iwl4965_priv *priv)
5050 {
5051         unsigned long flags;
5052
5053         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
5054                sizeof(priv->staging_rxon));
5055         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5056         iwl4965_commit_rxon(priv);
5057
5058         iwl4965_rxon_add_station(priv, priv->bssid, 1);
5059
5060         spin_lock_irqsave(&priv->lock, flags);
5061         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
5062         priv->error_recovering = 0;
5063         spin_unlock_irqrestore(&priv->lock, flags);
5064 }
5065
5066 static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
5067 {
5068         u32 inta, handled = 0;
5069         u32 inta_fh;
5070         unsigned long flags;
5071 #ifdef CONFIG_IWL4965_DEBUG
5072         u32 inta_mask;
5073 #endif
5074
5075         spin_lock_irqsave(&priv->lock, flags);
5076
5077         /* Ack/clear/reset pending uCode interrupts.
5078          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
5079          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
5080         inta = iwl4965_read32(priv, CSR_INT);
5081         iwl4965_write32(priv, CSR_INT, inta);
5082
5083         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
5084          * Any new interrupts that happen after this, either while we're
5085          * in this tasklet, or later, will show up in next ISR/tasklet. */
5086         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5087         iwl4965_write32(priv, CSR_FH_INT_STATUS, inta_fh);
5088
5089 #ifdef CONFIG_IWL4965_DEBUG
5090         if (iwl4965_debug_level & IWL_DL_ISR) {
5091                 /* just for debug */
5092                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5093                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5094                               inta, inta_mask, inta_fh);
5095         }
5096 #endif
5097
5098         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5099          * atomic, make sure that inta covers all the interrupts that
5100          * we've discovered, even if FH interrupt came in just after
5101          * reading CSR_INT. */
5102         if (inta_fh & CSR_FH_INT_RX_MASK)
5103                 inta |= CSR_INT_BIT_FH_RX;
5104         if (inta_fh & CSR_FH_INT_TX_MASK)
5105                 inta |= CSR_INT_BIT_FH_TX;
5106
5107         /* Now service all interrupt bits discovered above. */
5108         if (inta & CSR_INT_BIT_HW_ERR) {
5109                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5110
5111                 /* Tell the device to stop sending interrupts */
5112                 iwl4965_disable_interrupts(priv);
5113
5114                 iwl4965_irq_handle_error(priv);
5115
5116                 handled |= CSR_INT_BIT_HW_ERR;
5117
5118                 spin_unlock_irqrestore(&priv->lock, flags);
5119
5120                 return;
5121         }
5122
5123 #ifdef CONFIG_IWL4965_DEBUG
5124         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5125                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5126                 if (inta & CSR_INT_BIT_SCD)
5127                         IWL_DEBUG_ISR("Scheduler finished to transmit "
5128                                       "the frame/frames.\n");
5129
5130                 /* Alive notification via Rx interrupt will do the real work */
5131                 if (inta & CSR_INT_BIT_ALIVE)
5132                         IWL_DEBUG_ISR("Alive interrupt\n");
5133         }
5134 #endif
5135         /* Safely ignore these bits for debug checks below */
5136         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
5137
5138         /* HW RF KILL switch toggled */
5139         if (inta & CSR_INT_BIT_RF_KILL) {
5140                 int hw_rf_kill = 0;
5141                 if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
5142                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5143                         hw_rf_kill = 1;
5144
5145                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5146                                 "RF_KILL bit toggled to %s.\n",
5147                                 hw_rf_kill ? "disable radio":"enable radio");
5148
5149                 /* Queue restart only if RF_KILL switch was set to "kill"
5150                  *   when we loaded driver, and is now set to "enable".
5151                  * After we're Alive, RF_KILL gets handled by
5152                  *   iwl_rx_card_state_notif() */
5153                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
5154                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
5155                         queue_work(priv->workqueue, &priv->restart);
5156                 }
5157
5158                 handled |= CSR_INT_BIT_RF_KILL;
5159         }
5160
5161         /* Chip got too hot and stopped itself */
5162         if (inta & CSR_INT_BIT_CT_KILL) {
5163                 IWL_ERROR("Microcode CT kill error detected.\n");
5164                 handled |= CSR_INT_BIT_CT_KILL;
5165         }
5166
5167         /* Error detected by uCode */
5168         if (inta & CSR_INT_BIT_SW_ERR) {
5169                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5170                           inta);
5171                 iwl4965_irq_handle_error(priv);
5172                 handled |= CSR_INT_BIT_SW_ERR;
5173         }
5174
5175         /* uCode wakes up after power-down sleep */
5176         if (inta & CSR_INT_BIT_WAKEUP) {
5177                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5178                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
5179                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5180                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5181                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5182                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5183                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5184                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5185
5186                 handled |= CSR_INT_BIT_WAKEUP;
5187         }
5188
5189         /* All uCode command responses, including Tx command responses,
5190          * Rx "responses" (frame-received notification), and other
5191          * notifications from uCode come through here*/
5192         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5193                 iwl4965_rx_handle(priv);
5194                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5195         }
5196
5197         if (inta & CSR_INT_BIT_FH_TX) {
5198                 IWL_DEBUG_ISR("Tx interrupt\n");
5199                 handled |= CSR_INT_BIT_FH_TX;
5200         }
5201
5202         if (inta & ~handled)
5203                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5204
5205         if (inta & ~CSR_INI_SET_MASK) {
5206                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5207                          inta & ~CSR_INI_SET_MASK);
5208                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5209         }
5210
5211         /* Re-enable all interrupts */
5212         iwl4965_enable_interrupts(priv);
5213
5214 #ifdef CONFIG_IWL4965_DEBUG
5215         if (iwl4965_debug_level & (IWL_DL_ISR)) {
5216                 inta = iwl4965_read32(priv, CSR_INT);
5217                 inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
5218                 inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5219                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5220                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5221         }
5222 #endif
5223         spin_unlock_irqrestore(&priv->lock, flags);
5224 }
5225
5226 static irqreturn_t iwl4965_isr(int irq, void *data)
5227 {
5228         struct iwl4965_priv *priv = data;
5229         u32 inta, inta_mask;
5230         u32 inta_fh;
5231         if (!priv)
5232                 return IRQ_NONE;
5233
5234         spin_lock(&priv->lock);
5235
5236         /* Disable (but don't clear!) interrupts here to avoid
5237          *    back-to-back ISRs and sporadic interrupts from our NIC.
5238          * If we have something to service, the tasklet will re-enable ints.
5239          * If we *don't* have something, we'll re-enable before leaving here. */
5240         inta_mask = iwl4965_read32(priv, CSR_INT_MASK);  /* just for debug */
5241         iwl4965_write32(priv, CSR_INT_MASK, 0x00000000);
5242
5243         /* Discover which interrupts are active/pending */
5244         inta = iwl4965_read32(priv, CSR_INT);
5245         inta_fh = iwl4965_read32(priv, CSR_FH_INT_STATUS);
5246
5247         /* Ignore interrupt if there's nothing in NIC to service.
5248          * This may be due to IRQ shared with another device,
5249          * or due to sporadic interrupts thrown from our NIC. */
5250         if (!inta && !inta_fh) {
5251                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5252                 goto none;
5253         }
5254
5255         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5256                 /* Hardware disappeared. It might have already raised
5257                  * an interrupt */
5258                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5259                 goto unplugged;
5260         }
5261
5262         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5263                       inta, inta_mask, inta_fh);
5264
5265         inta &= ~CSR_INT_BIT_SCD;
5266
5267         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
5268         if (likely(inta || inta_fh))
5269                 tasklet_schedule(&priv->irq_tasklet);
5270
5271  unplugged:
5272         spin_unlock(&priv->lock);
5273         return IRQ_HANDLED;
5274
5275  none:
5276         /* re-enable interrupts here since we don't have anything to service. */
5277         iwl4965_enable_interrupts(priv);
5278         spin_unlock(&priv->lock);
5279         return IRQ_NONE;
5280 }
5281
5282 /************************** EEPROM BANDS ****************************
5283  *
5284  * The iwl4965_eeprom_band definitions below provide the mapping from the
5285  * EEPROM contents to the specific channel number supported for each
5286  * band.
5287  *
5288  * For example, iwl4965_priv->eeprom.band_3_channels[4] from the band_3
5289  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5290  * The specific geography and calibration information for that channel
5291  * is contained in the eeprom map itself.
5292  *
5293  * During init, we copy the eeprom information and channel map
5294  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5295  *
5296  * channel_map_24/52 provides the index in the channel_info array for a
5297  * given channel.  We have to have two separate maps as there is channel
5298  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5299  * band_2
5300  *
5301  * A value of 0xff stored in the channel_map indicates that the channel
5302  * is not supported by the hardware at all.
5303  *
5304  * A value of 0xfe in the channel_map indicates that the channel is not
5305  * valid for Tx with the current hardware.  This means that
5306  * while the system can tune and receive on a given channel, it may not
5307  * be able to associate or transmit any frames on that
5308  * channel.  There is no corresponding channel information for that
5309  * entry.
5310  *
5311  *********************************************************************/
5312
5313 /* 2.4 GHz */
5314 static const u8 iwl4965_eeprom_band_1[14] = {
5315         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5316 };
5317
5318 /* 5.2 GHz bands */
5319 static const u8 iwl4965_eeprom_band_2[] = {     /* 4915-5080MHz */
5320         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5321 };
5322
5323 static const u8 iwl4965_eeprom_band_3[] = {     /* 5170-5320MHz */
5324         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5325 };
5326
5327 static const u8 iwl4965_eeprom_band_4[] = {     /* 5500-5700MHz */
5328         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5329 };
5330
5331 static const u8 iwl4965_eeprom_band_5[] = {     /* 5725-5825MHz */
5332         145, 149, 153, 157, 161, 165
5333 };
5334
5335 static u8 iwl4965_eeprom_band_6[] = {       /* 2.4 FAT channel */
5336         1, 2, 3, 4, 5, 6, 7
5337 };
5338
5339 static u8 iwl4965_eeprom_band_7[] = {       /* 5.2 FAT channel */
5340         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5341 };
5342
5343 static void iwl4965_init_band_reference(const struct iwl4965_priv *priv,
5344                                     int band,
5345                                     int *eeprom_ch_count,
5346                                     const struct iwl4965_eeprom_channel
5347                                     **eeprom_ch_info,
5348                                     const u8 **eeprom_ch_index)
5349 {
5350         switch (band) {
5351         case 1:         /* 2.4GHz band */
5352                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_1);
5353                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5354                 *eeprom_ch_index = iwl4965_eeprom_band_1;
5355                 break;
5356         case 2:         /* 4.9GHz band */
5357                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_2);
5358                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5359                 *eeprom_ch_index = iwl4965_eeprom_band_2;
5360                 break;
5361         case 3:         /* 5.2GHz band */
5362                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_3);
5363                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5364                 *eeprom_ch_index = iwl4965_eeprom_band_3;
5365                 break;
5366         case 4:         /* 5.5GHz band */
5367                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_4);
5368                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5369                 *eeprom_ch_index = iwl4965_eeprom_band_4;
5370                 break;
5371         case 5:         /* 5.7GHz band */
5372                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_5);
5373                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5374                 *eeprom_ch_index = iwl4965_eeprom_band_5;
5375                 break;
5376         case 6:         /* 2.4GHz FAT channels */
5377                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_6);
5378                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5379                 *eeprom_ch_index = iwl4965_eeprom_band_6;
5380                 break;
5381         case 7:         /* 5 GHz FAT channels */
5382                 *eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_7);
5383                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5384                 *eeprom_ch_index = iwl4965_eeprom_band_7;
5385                 break;
5386         default:
5387                 BUG();
5388                 return;
5389         }
5390 }
5391
5392 /**
5393  * iwl4965_get_channel_info - Find driver's private channel info
5394  *
5395  * Based on band and channel number.
5396  */
5397 const struct iwl4965_channel_info *iwl4965_get_channel_info(const struct iwl4965_priv *priv,
5398                                                     enum ieee80211_band band, u16 channel)
5399 {
5400         int i;
5401
5402         switch (band) {
5403         case IEEE80211_BAND_5GHZ:
5404                 for (i = 14; i < priv->channel_count; i++) {
5405                         if (priv->channel_info[i].channel == channel)
5406                                 return &priv->channel_info[i];
5407                 }
5408                 break;
5409         case IEEE80211_BAND_2GHZ:
5410                 if (channel >= 1 && channel <= 14)
5411                         return &priv->channel_info[channel - 1];
5412                 break;
5413         default:
5414                 BUG();
5415         }
5416
5417         return NULL;
5418 }
5419
5420 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5421                             ? # x " " : "")
5422
5423 /**
5424  * iwl4965_init_channel_map - Set up driver's info for all possible channels
5425  */
5426 static int iwl4965_init_channel_map(struct iwl4965_priv *priv)
5427 {
5428         int eeprom_ch_count = 0;
5429         const u8 *eeprom_ch_index = NULL;
5430         const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
5431         int band, ch;
5432         struct iwl4965_channel_info *ch_info;
5433
5434         if (priv->channel_count) {
5435                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5436                 return 0;
5437         }
5438
5439         if (priv->eeprom.version < 0x2f) {
5440                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5441                             priv->eeprom.version);
5442                 return -EINVAL;
5443         }
5444
5445         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5446
5447         priv->channel_count =
5448             ARRAY_SIZE(iwl4965_eeprom_band_1) +
5449             ARRAY_SIZE(iwl4965_eeprom_band_2) +
5450             ARRAY_SIZE(iwl4965_eeprom_band_3) +
5451             ARRAY_SIZE(iwl4965_eeprom_band_4) +
5452             ARRAY_SIZE(iwl4965_eeprom_band_5);
5453
5454         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5455
5456         priv->channel_info = kzalloc(sizeof(struct iwl4965_channel_info) *
5457                                      priv->channel_count, GFP_KERNEL);
5458         if (!priv->channel_info) {
5459                 IWL_ERROR("Could not allocate channel_info\n");
5460                 priv->channel_count = 0;
5461                 return -ENOMEM;
5462         }
5463
5464         ch_info = priv->channel_info;
5465
5466         /* Loop through the 5 EEPROM bands adding them in order to the
5467          * channel map we maintain (that contains additional information than
5468          * what just in the EEPROM) */
5469         for (band = 1; band <= 5; band++) {
5470
5471                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5472                                         &eeprom_ch_info, &eeprom_ch_index);
5473
5474                 /* Loop through each band adding each of the channels */
5475                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5476                         ch_info->channel = eeprom_ch_index[ch];
5477                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
5478                             IEEE80211_BAND_5GHZ;
5479
5480                         /* permanently store EEPROM's channel regulatory flags
5481                          *   and max power in channel info database. */
5482                         ch_info->eeprom = eeprom_ch_info[ch];
5483
5484                         /* Copy the run-time flags so they are there even on
5485                          * invalid channels */
5486                         ch_info->flags = eeprom_ch_info[ch].flags;
5487
5488                         if (!(is_channel_valid(ch_info))) {
5489                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5490                                                "No traffic\n",
5491                                                ch_info->channel,
5492                                                ch_info->flags,
5493                                                is_channel_a_band(ch_info) ?
5494                                                "5.2" : "2.4");
5495                                 ch_info++;
5496                                 continue;
5497                         }
5498
5499                         /* Initialize regulatory-based run-time data */
5500                         ch_info->max_power_avg = ch_info->curr_txpow =
5501                             eeprom_ch_info[ch].max_power_avg;
5502                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5503                         ch_info->min_power = 0;
5504
5505                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5506                                        " %ddBm): Ad-Hoc %ssupported\n",
5507                                        ch_info->channel,
5508                                        is_channel_a_band(ch_info) ?
5509                                        "5.2" : "2.4",
5510                                        CHECK_AND_PRINT(IBSS),
5511                                        CHECK_AND_PRINT(ACTIVE),
5512                                        CHECK_AND_PRINT(RADAR),
5513                                        CHECK_AND_PRINT(WIDE),
5514                                        CHECK_AND_PRINT(NARROW),
5515                                        CHECK_AND_PRINT(DFS),
5516                                        eeprom_ch_info[ch].flags,
5517                                        eeprom_ch_info[ch].max_power_avg,
5518                                        ((eeprom_ch_info[ch].
5519                                          flags & EEPROM_CHANNEL_IBSS)
5520                                         && !(eeprom_ch_info[ch].
5521                                              flags & EEPROM_CHANNEL_RADAR))
5522                                        ? "" : "not ");
5523
5524                         /* Set the user_txpower_limit to the highest power
5525                          * supported by any channel */
5526                         if (eeprom_ch_info[ch].max_power_avg >
5527                             priv->user_txpower_limit)
5528                                 priv->user_txpower_limit =
5529                                     eeprom_ch_info[ch].max_power_avg;
5530
5531                         ch_info++;
5532                 }
5533         }
5534
5535         /* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
5536         for (band = 6; band <= 7; band++) {
5537                 enum ieee80211_band ieeeband;
5538                 u8 fat_extension_chan;
5539
5540                 iwl4965_init_band_reference(priv, band, &eeprom_ch_count,
5541                                         &eeprom_ch_info, &eeprom_ch_index);
5542
5543                 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
5544                 ieeeband = (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
5545
5546                 /* Loop through each band adding each of the channels */
5547                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5548
5549                         if ((band == 6) &&
5550                             ((eeprom_ch_index[ch] == 5) ||
5551                             (eeprom_ch_index[ch] == 6) ||
5552                             (eeprom_ch_index[ch] == 7)))
5553                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5554                         else
5555                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5556
5557                         /* Set up driver's info for lower half */
5558                         iwl4965_set_fat_chan_info(priv, ieeeband,
5559                                                   eeprom_ch_index[ch],
5560                                                   &(eeprom_ch_info[ch]),
5561                                                   fat_extension_chan);
5562
5563                         /* Set up driver's info for upper half */
5564                         iwl4965_set_fat_chan_info(priv, ieeeband,
5565                                                   (eeprom_ch_index[ch] + 4),
5566                                                   &(eeprom_ch_info[ch]),
5567                                                   HT_IE_EXT_CHANNEL_BELOW);
5568                 }
5569         }
5570
5571         return 0;
5572 }
5573
5574 /*
5575  * iwl4965_free_channel_map - undo allocations in iwl4965_init_channel_map
5576  */
5577 static void iwl4965_free_channel_map(struct iwl4965_priv *priv)
5578 {
5579         kfree(priv->channel_info);
5580         priv->channel_count = 0;
5581 }
5582
5583 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5584  * sending probe req.  This should be set long enough to hear probe responses
5585  * from more than one AP.  */
5586 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5587 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5588
5589 /* For faster active scanning, scan will move to the next channel if fewer than
5590  * PLCP_QUIET_THRESH packets are heard on this channel within
5591  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5592  * time if it's a quiet channel (nothing responded to our probe, and there's
5593  * no other traffic).
5594  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5595 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5596 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5597
5598 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5599  * Must be set longer than active dwell time.
5600  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5601 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5602 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5603 #define IWL_PASSIVE_DWELL_BASE      (100)
5604 #define IWL_CHANNEL_TUNE_TIME       5
5605
5606 static inline u16 iwl4965_get_active_dwell_time(struct iwl4965_priv *priv,
5607                                                 enum ieee80211_band band)
5608 {
5609         if (band == IEEE80211_BAND_5GHZ)
5610                 return IWL_ACTIVE_DWELL_TIME_52;
5611         else
5612                 return IWL_ACTIVE_DWELL_TIME_24;
5613 }
5614
5615 static u16 iwl4965_get_passive_dwell_time(struct iwl4965_priv *priv,
5616                                           enum ieee80211_band band)
5617 {
5618         u16 active = iwl4965_get_active_dwell_time(priv, band);
5619         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
5620             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5621             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5622
5623         if (iwl4965_is_associated(priv)) {
5624                 /* If we're associated, we clamp the maximum passive
5625                  * dwell time to be 98% of the beacon interval (minus
5626                  * 2 * channel tune time) */
5627                 passive = priv->beacon_int;
5628                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5629                         passive = IWL_PASSIVE_DWELL_BASE;
5630                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5631         }
5632
5633         if (passive <= active)
5634                 passive = active + 1;
5635
5636         return passive;
5637 }
5638
5639 static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv,
5640                                          enum ieee80211_band band,
5641                                      u8 is_active, u8 direct_mask,
5642                                      struct iwl4965_scan_channel *scan_ch)
5643 {
5644         const struct ieee80211_channel *channels = NULL;
5645         const struct ieee80211_supported_band *sband;
5646         const struct iwl4965_channel_info *ch_info;
5647         u16 passive_dwell = 0;
5648         u16 active_dwell = 0;
5649         int added, i;
5650
5651         sband = iwl4965_get_hw_mode(priv, band);
5652         if (!sband)
5653                 return 0;
5654
5655         channels = sband->channels;
5656
5657         active_dwell = iwl4965_get_active_dwell_time(priv, band);
5658         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
5659
5660         for (i = 0, added = 0; i < sband->n_channels; i++) {
5661                 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
5662                     le16_to_cpu(priv->active_rxon.channel)) {
5663                         if (iwl4965_is_associated(priv)) {
5664                                 IWL_DEBUG_SCAN
5665                                     ("Skipping current channel %d\n",
5666                                      le16_to_cpu(priv->active_rxon.channel));
5667                                 continue;
5668                         }
5669                 } else if (priv->only_active_channel)
5670                         continue;
5671
5672                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
5673
5674                 ch_info = iwl4965_get_channel_info(priv, band,
5675                                          scan_ch->channel);
5676                 if (!is_channel_valid(ch_info)) {
5677                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5678                                        scan_ch->channel);
5679                         continue;
5680                 }
5681
5682                 if (!is_active || is_channel_passive(ch_info) ||
5683                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
5684                         scan_ch->type = 0;      /* passive */
5685                 else
5686                         scan_ch->type = 1;      /* active */
5687
5688                 if (scan_ch->type & 1)
5689                         scan_ch->type |= (direct_mask << 1);
5690
5691                 if (is_channel_narrow(ch_info))
5692                         scan_ch->type |= (1 << 7);
5693
5694                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5695                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5696
5697                 /* Set txpower levels to defaults */
5698                 scan_ch->tpc.dsp_atten = 110;
5699                 /* scan_pwr_info->tpc.dsp_atten; */
5700
5701                 /*scan_pwr_info->tpc.tx_gain; */
5702                 if (band == IEEE80211_BAND_5GHZ)
5703                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5704                 else {
5705                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5706                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5707                          * power level:
5708                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
5709                          */
5710                 }
5711
5712                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5713                                scan_ch->channel,
5714                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5715                                (scan_ch->type & 1) ?
5716                                active_dwell : passive_dwell);
5717
5718                 scan_ch++;
5719                 added++;
5720         }
5721
5722         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5723         return added;
5724 }
5725
5726 static void iwl4965_init_hw_rates(struct iwl4965_priv *priv,
5727                               struct ieee80211_rate *rates)
5728 {
5729         int i;
5730
5731         for (i = 0; i < IWL_RATE_COUNT; i++) {
5732                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
5733                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
5734                 rates[i].hw_value_short = i;
5735                 rates[i].flags = 0;
5736                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
5737                         /*
5738                          * If CCK != 1M then set short preamble rate flag.
5739                          */
5740                         rates[i].flags |= (iwl4965_rates[i].plcp == 10) ?
5741                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
5742                 }
5743         }
5744 }
5745
5746 /**
5747  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
5748  */
5749 static int iwl4965_init_geos(struct iwl4965_priv *priv)
5750 {
5751         struct iwl4965_channel_info *ch;
5752         struct ieee80211_supported_band *band;
5753         struct ieee80211_channel *channels;
5754         struct ieee80211_channel *geo_ch;
5755         struct ieee80211_rate *rates;
5756         int i = 0;
5757
5758         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
5759             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
5760                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5761                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5762                 return 0;
5763         }
5764
5765         channels = kzalloc(sizeof(struct ieee80211_channel) *
5766                            priv->channel_count, GFP_KERNEL);
5767         if (!channels)
5768                 return -ENOMEM;
5769
5770         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5771                         GFP_KERNEL);
5772         if (!rates) {
5773                 kfree(channels);
5774                 return -ENOMEM;
5775         }
5776
5777         /* 5.2GHz channels start after the 2.4GHz channels */
5778         band = &priv->bands[IEEE80211_BAND_5GHZ];
5779         band->channels = &channels[ARRAY_SIZE(iwl4965_eeprom_band_1)];
5780         band->bitrates = &rates[4];
5781         band->n_bitrates = 8;   /* just OFDM */
5782
5783         iwl4965_init_ht_hw_capab(&band->ht_info, IEEE80211_BAND_5GHZ);
5784
5785         band = &priv->bands[IEEE80211_BAND_2GHZ];
5786         band->channels = channels;
5787         band->bitrates = rates;
5788         band->n_bitrates = 12;  /* OFDM & CCK */
5789
5790         iwl4965_init_ht_hw_capab(&band->ht_info, IEEE80211_BAND_2GHZ);
5791
5792         priv->ieee_channels = channels;
5793         priv->ieee_rates = rates;
5794
5795         iwl4965_init_hw_rates(priv, rates);
5796
5797         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5798                 ch = &priv->channel_info[i];
5799
5800                 if (!is_channel_valid(ch)) {
5801                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5802                                     "skipping.\n",
5803                                     ch->channel, is_channel_a_band(ch) ?
5804                                     "5.2" : "2.4");
5805                         continue;
5806                 }
5807
5808                 if (is_channel_a_band(ch)) {
5809                         geo_ch = &priv->bands[IEEE80211_BAND_5GHZ].channels[priv->bands[IEEE80211_BAND_5GHZ].n_channels++];
5810                 } else
5811                         geo_ch = &priv->bands[IEEE80211_BAND_2GHZ].channels[priv->bands[IEEE80211_BAND_2GHZ].n_channels++];
5812
5813                 geo_ch->center_freq = ieee80211chan2mhz(ch->channel);
5814                 geo_ch->max_power = ch->max_power_avg;
5815                 geo_ch->max_antenna_gain = 0xff;
5816                 geo_ch->hw_value = ch->channel;
5817
5818                 if (is_channel_valid(ch)) {
5819                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
5820                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
5821
5822                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
5823                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
5824
5825                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5826                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
5827
5828                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5829                                 priv->max_channel_txpower_limit =
5830                                     ch->max_power_avg;
5831                 } else
5832                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
5833         }
5834
5835         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) && priv->is_abg) {
5836                 printk(KERN_INFO DRV_NAME
5837                        ": Incorrectly detected BG card as ABG.  Please send "
5838                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5839                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5840                 priv->is_abg = 0;
5841         }
5842
5843         printk(KERN_INFO DRV_NAME
5844                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5845                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
5846                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
5847
5848         priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ];
5849         priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ];
5850
5851         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5852
5853         return 0;
5854 }
5855
5856 /*
5857  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5858  */
5859 static void iwl4965_free_geos(struct iwl4965_priv *priv)
5860 {
5861         kfree(priv->ieee_channels);
5862         kfree(priv->ieee_rates);
5863         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5864 }
5865
5866 /******************************************************************************
5867  *
5868  * uCode download functions
5869  *
5870  ******************************************************************************/
5871
5872 static void iwl4965_dealloc_ucode_pci(struct iwl4965_priv *priv)
5873 {
5874         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5875         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5876         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5877         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5878         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5879         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5880 }
5881
5882 /**
5883  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5884  *     looking at all data.
5885  */
5886 static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 *image,
5887                                  u32 len)
5888 {
5889         u32 val;
5890         u32 save_len = len;
5891         int rc = 0;
5892         u32 errcnt;
5893
5894         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5895
5896         rc = iwl4965_grab_nic_access(priv);
5897         if (rc)
5898                 return rc;
5899
5900         iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5901
5902         errcnt = 0;
5903         for (; len > 0; len -= sizeof(u32), image++) {
5904                 /* read data comes through single port, auto-incr addr */
5905                 /* NOTE: Use the debugless read so we don't flood kernel log
5906                  * if IWL_DL_IO is set */
5907                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5908                 if (val != le32_to_cpu(*image)) {
5909                         IWL_ERROR("uCode INST section is invalid at "
5910                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5911                                   save_len - len, val, le32_to_cpu(*image));
5912                         rc = -EIO;
5913                         errcnt++;
5914                         if (errcnt >= 20)
5915                                 break;
5916                 }
5917         }
5918
5919         iwl4965_release_nic_access(priv);
5920
5921         if (!errcnt)
5922                 IWL_DEBUG_INFO
5923                     ("ucode image in INSTRUCTION memory is good\n");
5924
5925         return rc;
5926 }
5927
5928
5929 /**
5930  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
5931  *   using sample data 100 bytes apart.  If these sample points are good,
5932  *   it's a pretty good bet that everything between them is good, too.
5933  */
5934 static int iwl4965_verify_inst_sparse(struct iwl4965_priv *priv, __le32 *image, u32 len)
5935 {
5936         u32 val;
5937         int rc = 0;
5938         u32 errcnt = 0;
5939         u32 i;
5940
5941         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5942
5943         rc = iwl4965_grab_nic_access(priv);
5944         if (rc)
5945                 return rc;
5946
5947         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5948                 /* read data comes through single port, auto-incr addr */
5949                 /* NOTE: Use the debugless read so we don't flood kernel log
5950                  * if IWL_DL_IO is set */
5951                 iwl4965_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5952                         i + RTC_INST_LOWER_BOUND);
5953                 val = _iwl4965_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5954                 if (val != le32_to_cpu(*image)) {
5955 #if 0 /* Enable this if you want to see details */
5956                         IWL_ERROR("uCode INST section is invalid at "
5957                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5958                                   i, val, *image);
5959 #endif
5960                         rc = -EIO;
5961                         errcnt++;
5962                         if (errcnt >= 3)
5963                                 break;
5964                 }
5965         }
5966
5967         iwl4965_release_nic_access(priv);
5968
5969         return rc;
5970 }
5971
5972
5973 /**
5974  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
5975  *    and verify its contents
5976  */
5977 static int iwl4965_verify_ucode(struct iwl4965_priv *priv)
5978 {
5979         __le32 *image;
5980         u32 len;
5981         int rc = 0;
5982
5983         /* Try bootstrap */
5984         image = (__le32 *)priv->ucode_boot.v_addr;
5985         len = priv->ucode_boot.len;
5986         rc = iwl4965_verify_inst_sparse(priv, image, len);
5987         if (rc == 0) {
5988                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5989                 return 0;
5990         }
5991
5992         /* Try initialize */
5993         image = (__le32 *)priv->ucode_init.v_addr;
5994         len = priv->ucode_init.len;
5995         rc = iwl4965_verify_inst_sparse(priv, image, len);
5996         if (rc == 0) {
5997                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5998                 return 0;
5999         }
6000
6001         /* Try runtime/protocol */
6002         image = (__le32 *)priv->ucode_code.v_addr;
6003         len = priv->ucode_code.len;
6004         rc = iwl4965_verify_inst_sparse(priv, image, len);
6005         if (rc == 0) {
6006                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
6007                 return 0;
6008         }
6009
6010         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
6011
6012         /* Since nothing seems to match, show first several data entries in
6013          * instruction SRAM, so maybe visual inspection will give a clue.
6014          * Selection of bootstrap image (vs. other images) is arbitrary. */
6015         image = (__le32 *)priv->ucode_boot.v_addr;
6016         len = priv->ucode_boot.len;
6017         rc = iwl4965_verify_inst_full(priv, image, len);
6018
6019         return rc;
6020 }
6021
6022
6023 /* check contents of special bootstrap uCode SRAM */
6024 static int iwl4965_verify_bsm(struct iwl4965_priv *priv)
6025 {
6026         __le32 *image = priv->ucode_boot.v_addr;
6027         u32 len = priv->ucode_boot.len;
6028         u32 reg;
6029         u32 val;
6030
6031         IWL_DEBUG_INFO("Begin verify bsm\n");
6032
6033         /* verify BSM SRAM contents */
6034         val = iwl4965_read_prph(priv, BSM_WR_DWCOUNT_REG);
6035         for (reg = BSM_SRAM_LOWER_BOUND;
6036              reg < BSM_SRAM_LOWER_BOUND + len;
6037              reg += sizeof(u32), image ++) {
6038                 val = iwl4965_read_prph(priv, reg);
6039                 if (val != le32_to_cpu(*image)) {
6040                         IWL_ERROR("BSM uCode verification failed at "
6041                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6042                                   BSM_SRAM_LOWER_BOUND,
6043                                   reg - BSM_SRAM_LOWER_BOUND, len,
6044                                   val, le32_to_cpu(*image));
6045                         return -EIO;
6046                 }
6047         }
6048
6049         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6050
6051         return 0;
6052 }
6053
6054 /**
6055  * iwl4965_load_bsm - Load bootstrap instructions
6056  *
6057  * BSM operation:
6058  *
6059  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6060  * in special SRAM that does not power down during RFKILL.  When powering back
6061  * up after power-saving sleeps (or during initial uCode load), the BSM loads
6062  * the bootstrap program into the on-board processor, and starts it.
6063  *
6064  * The bootstrap program loads (via DMA) instructions and data for a new
6065  * program from host DRAM locations indicated by the host driver in the
6066  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
6067  * automatically.
6068  *
6069  * When initializing the NIC, the host driver points the BSM to the
6070  * "initialize" uCode image.  This uCode sets up some internal data, then
6071  * notifies host via "initialize alive" that it is complete.
6072  *
6073  * The host then replaces the BSM_DRAM_* pointer values to point to the
6074  * normal runtime uCode instructions and a backup uCode data cache buffer
6075  * (filled initially with starting data values for the on-board processor),
6076  * then triggers the "initialize" uCode to load and launch the runtime uCode,
6077  * which begins normal operation.
6078  *
6079  * When doing a power-save shutdown, runtime uCode saves data SRAM into
6080  * the backup data cache in DRAM before SRAM is powered down.
6081  *
6082  * When powering back up, the BSM loads the bootstrap program.  This reloads
6083  * the runtime uCode instructions and the backup data cache into SRAM,
6084  * and re-launches the runtime uCode from where it left off.
6085  */
6086 static int iwl4965_load_bsm(struct iwl4965_priv *priv)
6087 {
6088         __le32 *image = priv->ucode_boot.v_addr;
6089         u32 len = priv->ucode_boot.len;
6090         dma_addr_t pinst;
6091         dma_addr_t pdata;
6092         u32 inst_len;
6093         u32 data_len;
6094         int rc;
6095         int i;
6096         u32 done;
6097         u32 reg_offset;
6098
6099         IWL_DEBUG_INFO("Begin load bsm\n");
6100
6101         /* make sure bootstrap program is no larger than BSM's SRAM size */
6102         if (len > IWL_MAX_BSM_SIZE)
6103                 return -EINVAL;
6104
6105         /* Tell bootstrap uCode where to find the "Initialize" uCode
6106          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
6107          * NOTE:  iwl4965_initialize_alive_start() will replace these values,
6108          *        after the "initialize" uCode has run, to point to
6109          *        runtime/protocol instructions and backup data cache. */
6110         pinst = priv->ucode_init.p_addr >> 4;
6111         pdata = priv->ucode_init_data.p_addr >> 4;
6112         inst_len = priv->ucode_init.len;
6113         data_len = priv->ucode_init_data.len;
6114
6115         rc = iwl4965_grab_nic_access(priv);
6116         if (rc)
6117                 return rc;
6118
6119         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6120         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6121         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6122         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6123
6124         /* Fill BSM memory with bootstrap instructions */
6125         for (reg_offset = BSM_SRAM_LOWER_BOUND;
6126              reg_offset < BSM_SRAM_LOWER_BOUND + len;
6127              reg_offset += sizeof(u32), image++)
6128                 _iwl4965_write_prph(priv, reg_offset,
6129                                           le32_to_cpu(*image));
6130
6131         rc = iwl4965_verify_bsm(priv);
6132         if (rc) {
6133                 iwl4965_release_nic_access(priv);
6134                 return rc;
6135         }
6136
6137         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6138         iwl4965_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
6139         iwl4965_write_prph(priv, BSM_WR_MEM_DST_REG,
6140                                  RTC_INST_LOWER_BOUND);
6141         iwl4965_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6142
6143         /* Load bootstrap code into instruction SRAM now,
6144          *   to prepare to load "initialize" uCode */
6145         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
6146                 BSM_WR_CTRL_REG_BIT_START);
6147
6148         /* Wait for load of bootstrap uCode to finish */
6149         for (i = 0; i < 100; i++) {
6150                 done = iwl4965_read_prph(priv, BSM_WR_CTRL_REG);
6151                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6152                         break;
6153                 udelay(10);
6154         }
6155         if (i < 100)
6156                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6157         else {
6158                 IWL_ERROR("BSM write did not complete!\n");
6159                 return -EIO;
6160         }
6161
6162         /* Enable future boot loads whenever power management unit triggers it
6163          *   (e.g. when powering back up after power-save shutdown) */
6164         iwl4965_write_prph(priv, BSM_WR_CTRL_REG,
6165                 BSM_WR_CTRL_REG_BIT_START_EN);
6166
6167         iwl4965_release_nic_access(priv);
6168
6169         return 0;
6170 }
6171
6172 static void iwl4965_nic_start(struct iwl4965_priv *priv)
6173 {
6174         /* Remove all resets to allow NIC to operate */
6175         iwl4965_write32(priv, CSR_RESET, 0);
6176 }
6177
6178
6179 /**
6180  * iwl4965_read_ucode - Read uCode images from disk file.
6181  *
6182  * Copy into buffers for card to fetch via bus-mastering
6183  */
6184 static int iwl4965_read_ucode(struct iwl4965_priv *priv)
6185 {
6186         struct iwl4965_ucode *ucode;
6187         int ret;
6188         const struct firmware *ucode_raw;
6189         const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6190         u8 *src;
6191         size_t len;
6192         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6193
6194         /* Ask kernel firmware_class module to get the boot firmware off disk.
6195          * request_firmware() is synchronous, file is in memory on return. */
6196         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6197         if (ret < 0) {
6198                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
6199                                         name, ret);
6200                 goto error;
6201         }
6202
6203         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6204                        name, ucode_raw->size);
6205
6206         /* Make sure that we got at least our header! */
6207         if (ucode_raw->size < sizeof(*ucode)) {
6208                 IWL_ERROR("File size way too small!\n");
6209                 ret = -EINVAL;
6210                 goto err_release;
6211         }
6212
6213         /* Data from ucode file:  header followed by uCode images */
6214         ucode = (void *)ucode_raw->data;
6215
6216         ver = le32_to_cpu(ucode->ver);
6217         inst_size = le32_to_cpu(ucode->inst_size);
6218         data_size = le32_to_cpu(ucode->data_size);
6219         init_size = le32_to_cpu(ucode->init_size);
6220         init_data_size = le32_to_cpu(ucode->init_data_size);
6221         boot_size = le32_to_cpu(ucode->boot_size);
6222
6223         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6224         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6225                        inst_size);
6226         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6227                        data_size);
6228         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6229                        init_size);
6230         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6231                        init_data_size);
6232         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6233                        boot_size);
6234
6235         /* Verify size of file vs. image size info in file's header */
6236         if (ucode_raw->size < sizeof(*ucode) +
6237                 inst_size + data_size + init_size +
6238                 init_data_size + boot_size) {
6239
6240                 IWL_DEBUG_INFO("uCode file size %d too small\n",
6241                                (int)ucode_raw->size);
6242                 ret = -EINVAL;
6243                 goto err_release;
6244         }
6245
6246         /* Verify that uCode images will fit in card's SRAM */
6247         if (inst_size > IWL_MAX_INST_SIZE) {
6248                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
6249                                inst_size);
6250                 ret = -EINVAL;
6251                 goto err_release;
6252         }
6253
6254         if (data_size > IWL_MAX_DATA_SIZE) {
6255                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
6256                                 data_size);
6257                 ret = -EINVAL;
6258                 goto err_release;
6259         }
6260         if (init_size > IWL_MAX_INST_SIZE) {
6261                 IWL_DEBUG_INFO
6262                     ("uCode init instr len %d too large to fit in\n",
6263                       init_size);
6264                 ret = -EINVAL;
6265                 goto err_release;
6266         }
6267         if (init_data_size > IWL_MAX_DATA_SIZE) {
6268                 IWL_DEBUG_INFO
6269                     ("uCode init data len %d too large to fit in\n",
6270                       init_data_size);
6271                 ret = -EINVAL;
6272                 goto err_release;
6273         }
6274         if (boot_size > IWL_MAX_BSM_SIZE) {
6275                 IWL_DEBUG_INFO
6276                     ("uCode boot instr len %d too large to fit in\n",
6277                       boot_size);
6278                 ret = -EINVAL;
6279                 goto err_release;
6280         }
6281
6282         /* Allocate ucode buffers for card's bus-master loading ... */
6283
6284         /* Runtime instructions and 2 copies of data:
6285          * 1) unmodified from disk
6286          * 2) backup cache for save/restore during power-downs */
6287         priv->ucode_code.len = inst_size;
6288         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
6289
6290         priv->ucode_data.len = data_size;
6291         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
6292
6293         priv->ucode_data_backup.len = data_size;
6294         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
6295
6296         /* Initialization instructions and data */
6297         if (init_size && init_data_size) {
6298                 priv->ucode_init.len = init_size;
6299                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
6300
6301                 priv->ucode_init_data.len = init_data_size;
6302                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
6303
6304                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
6305                         goto err_pci_alloc;
6306         }
6307
6308         /* Bootstrap (instructions only, no data) */
6309         if (boot_size) {
6310                 priv->ucode_boot.len = boot_size;
6311                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
6312
6313                 if (!priv->ucode_boot.v_addr)
6314                         goto err_pci_alloc;
6315         }
6316
6317         /* Copy images into buffers for card's bus-master reads ... */
6318
6319         /* Runtime instructions (first block of data in file) */
6320         src = &ucode->data[0];
6321         len = priv->ucode_code.len;
6322         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
6323         memcpy(priv->ucode_code.v_addr, src, len);
6324         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6325                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6326
6327         /* Runtime data (2nd block)
6328          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
6329         src = &ucode->data[inst_size];
6330         len = priv->ucode_data.len;
6331         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
6332         memcpy(priv->ucode_data.v_addr, src, len);
6333         memcpy(priv->ucode_data_backup.v_addr, src, len);
6334
6335         /* Initialization instructions (3rd block) */
6336         if (init_size) {
6337                 src = &ucode->data[inst_size + data_size];
6338                 len = priv->ucode_init.len;
6339                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
6340                                 len);
6341                 memcpy(priv->ucode_init.v_addr, src, len);
6342         }
6343
6344         /* Initialization data (4th block) */
6345         if (init_data_size) {
6346                 src = &ucode->data[inst_size + data_size + init_size];
6347                 len = priv->ucode_init_data.len;
6348                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
6349                                len);
6350                 memcpy(priv->ucode_init_data.v_addr, src, len);
6351         }
6352
6353         /* Bootstrap instructions (5th block) */
6354         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6355         len = priv->ucode_boot.len;
6356         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
6357         memcpy(priv->ucode_boot.v_addr, src, len);
6358
6359         /* We have our copies now, allow OS release its copies */
6360         release_firmware(ucode_raw);
6361         return 0;
6362
6363  err_pci_alloc:
6364         IWL_ERROR("failed to allocate pci memory\n");
6365         ret = -ENOMEM;
6366         iwl4965_dealloc_ucode_pci(priv);
6367
6368  err_release:
6369         release_firmware(ucode_raw);
6370
6371  error:
6372         return ret;
6373 }
6374
6375
6376 /**
6377  * iwl4965_set_ucode_ptrs - Set uCode address location
6378  *
6379  * Tell initialization uCode where to find runtime uCode.
6380  *
6381  * BSM registers initially contain pointers to initialization uCode.
6382  * We need to replace them to load runtime uCode inst and data,
6383  * and to save runtime data when powering down.
6384  */
6385 static int iwl4965_set_ucode_ptrs(struct iwl4965_priv *priv)
6386 {
6387         dma_addr_t pinst;
6388         dma_addr_t pdata;
6389         int rc = 0;
6390         unsigned long flags;
6391
6392         /* bits 35:4 for 4965 */
6393         pinst = priv->ucode_code.p_addr >> 4;
6394         pdata = priv->ucode_data_backup.p_addr >> 4;
6395
6396         spin_lock_irqsave(&priv->lock, flags);
6397         rc = iwl4965_grab_nic_access(priv);
6398         if (rc) {
6399                 spin_unlock_irqrestore(&priv->lock, flags);
6400                 return rc;
6401         }
6402
6403         /* Tell bootstrap uCode where to find image to load */
6404         iwl4965_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
6405         iwl4965_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6406         iwl4965_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6407                                  priv->ucode_data.len);
6408
6409         /* Inst bytecount must be last to set up, bit 31 signals uCode
6410          *   that all new ptr/size info is in place */
6411         iwl4965_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6412                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6413
6414         iwl4965_release_nic_access(priv);
6415
6416         spin_unlock_irqrestore(&priv->lock, flags);
6417
6418         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6419
6420         return rc;
6421 }
6422
6423 /**
6424  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
6425  *
6426  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6427  *
6428  * The 4965 "initialize" ALIVE reply contains calibration data for:
6429  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6430  *   (3945 does not contain this data).
6431  *
6432  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6433 */
6434 static void iwl4965_init_alive_start(struct iwl4965_priv *priv)
6435 {
6436         /* Check alive response for "valid" sign from uCode */
6437         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6438                 /* We had an error bringing up the hardware, so take it
6439                  * all the way back down so we can try again */
6440                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6441                 goto restart;
6442         }
6443
6444         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6445          * This is a paranoid check, because we would not have gotten the
6446          * "initialize" alive if code weren't properly loaded.  */
6447         if (iwl4965_verify_ucode(priv)) {
6448                 /* Runtime instruction load was bad;
6449                  * take it all the way back down so we can try again */
6450                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6451                 goto restart;
6452         }
6453
6454         /* Calculate temperature */
6455         priv->temperature = iwl4965_get_temperature(priv);
6456
6457         /* Send pointers to protocol/runtime uCode image ... init code will
6458          * load and launch runtime uCode, which will send us another "Alive"
6459          * notification. */
6460         IWL_DEBUG_INFO("Initialization Alive received.\n");
6461         if (iwl4965_set_ucode_ptrs(priv)) {
6462                 /* Runtime instruction load won't happen;
6463                  * take it all the way back down so we can try again */
6464                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6465                 goto restart;
6466         }
6467         return;
6468
6469  restart:
6470         queue_work(priv->workqueue, &priv->restart);
6471 }
6472
6473
6474 /**
6475  * iwl4965_alive_start - called after REPLY_ALIVE notification received
6476  *                   from protocol/runtime uCode (initialization uCode's
6477  *                   Alive gets handled by iwl4965_init_alive_start()).
6478  */
6479 static void iwl4965_alive_start(struct iwl4965_priv *priv)
6480 {
6481         int rc = 0;
6482
6483         IWL_DEBUG_INFO("Runtime Alive received.\n");
6484
6485         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6486                 /* We had an error bringing up the hardware, so take it
6487                  * all the way back down so we can try again */
6488                 IWL_DEBUG_INFO("Alive failed.\n");
6489                 goto restart;
6490         }
6491
6492         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6493          * This is a paranoid check, because we would not have gotten the
6494          * "runtime" alive if code weren't properly loaded.  */
6495         if (iwl4965_verify_ucode(priv)) {
6496                 /* Runtime instruction load was bad;
6497                  * take it all the way back down so we can try again */
6498                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6499                 goto restart;
6500         }
6501
6502         iwl4965_clear_stations_table(priv);
6503
6504         rc = iwl4965_alive_notify(priv);
6505         if (rc) {
6506                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6507                             rc);
6508                 goto restart;
6509         }
6510
6511         /* After the ALIVE response, we can send host commands to 4965 uCode */
6512         set_bit(STATUS_ALIVE, &priv->status);
6513
6514         /* Clear out the uCode error bit if it is set */
6515         clear_bit(STATUS_FW_ERROR, &priv->status);
6516
6517         if (iwl4965_is_rfkill(priv))
6518                 return;
6519
6520         ieee80211_start_queues(priv->hw);
6521
6522         priv->active_rate = priv->rates_mask;
6523         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6524
6525         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6526
6527         if (iwl4965_is_associated(priv)) {
6528                 struct iwl4965_rxon_cmd *active_rxon =
6529                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
6530
6531                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6532                        sizeof(priv->staging_rxon));
6533                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6534         } else {
6535                 /* Initialize our rx_config data */
6536                 iwl4965_connection_init_rx_config(priv);
6537                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6538         }
6539
6540         /* Configure Bluetooth device coexistence support */
6541         iwl4965_send_bt_config(priv);
6542
6543         /* Configure the adapter for unassociated operation */
6544         iwl4965_commit_rxon(priv);
6545
6546         /* At this point, the NIC is initialized and operational */
6547         priv->notif_missed_beacons = 0;
6548         set_bit(STATUS_READY, &priv->status);
6549
6550         iwl4965_rf_kill_ct_config(priv);
6551
6552         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6553         wake_up_interruptible(&priv->wait_command_queue);
6554
6555         if (priv->error_recovering)
6556                 iwl4965_error_recovery(priv);
6557
6558         return;
6559
6560  restart:
6561         queue_work(priv->workqueue, &priv->restart);
6562 }
6563
6564 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv);
6565
6566 static void __iwl4965_down(struct iwl4965_priv *priv)
6567 {
6568         unsigned long flags;
6569         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6570         struct ieee80211_conf *conf = NULL;
6571
6572         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6573
6574         conf = ieee80211_get_hw_conf(priv->hw);
6575
6576         if (!exit_pending)
6577                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6578
6579         iwl4965_clear_stations_table(priv);
6580
6581         /* Unblock any waiting calls */
6582         wake_up_interruptible_all(&priv->wait_command_queue);
6583
6584         /* Wipe out the EXIT_PENDING status bit if we are not actually
6585          * exiting the module */
6586         if (!exit_pending)
6587                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6588
6589         /* stop and reset the on-board processor */
6590         iwl4965_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6591
6592         /* tell the device to stop sending interrupts */
6593         iwl4965_disable_interrupts(priv);
6594
6595         if (priv->mac80211_registered)
6596                 ieee80211_stop_queues(priv->hw);
6597
6598         /* If we have not previously called iwl4965_init() then
6599          * clear all bits but the RF Kill and SUSPEND bits and return */
6600         if (!iwl4965_is_init(priv)) {
6601                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6602                                         STATUS_RF_KILL_HW |
6603                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6604                                         STATUS_RF_KILL_SW |
6605                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6606                                         STATUS_GEO_CONFIGURED |
6607                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6608                                         STATUS_IN_SUSPEND;
6609                 goto exit;
6610         }
6611
6612         /* ...otherwise clear out all the status bits but the RF Kill and
6613          * SUSPEND bits and continue taking the NIC down. */
6614         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6615                                 STATUS_RF_KILL_HW |
6616                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6617                                 STATUS_RF_KILL_SW |
6618                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
6619                                 STATUS_GEO_CONFIGURED |
6620                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6621                                 STATUS_IN_SUSPEND |
6622                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6623                                 STATUS_FW_ERROR;
6624
6625         spin_lock_irqsave(&priv->lock, flags);
6626         iwl4965_clear_bit(priv, CSR_GP_CNTRL,
6627                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6628         spin_unlock_irqrestore(&priv->lock, flags);
6629
6630         iwl4965_hw_txq_ctx_stop(priv);
6631         iwl4965_hw_rxq_stop(priv);
6632
6633         spin_lock_irqsave(&priv->lock, flags);
6634         if (!iwl4965_grab_nic_access(priv)) {
6635                 iwl4965_write_prph(priv, APMG_CLK_DIS_REG,
6636                                          APMG_CLK_VAL_DMA_CLK_RQT);
6637                 iwl4965_release_nic_access(priv);
6638         }
6639         spin_unlock_irqrestore(&priv->lock, flags);
6640
6641         udelay(5);
6642
6643         iwl4965_hw_nic_stop_master(priv);
6644         iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6645         iwl4965_hw_nic_reset(priv);
6646
6647  exit:
6648         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
6649
6650         if (priv->ibss_beacon)
6651                 dev_kfree_skb(priv->ibss_beacon);
6652         priv->ibss_beacon = NULL;
6653
6654         /* clear out any free frames */
6655         iwl4965_clear_free_frames(priv);
6656 }
6657
6658 static void iwl4965_down(struct iwl4965_priv *priv)
6659 {
6660         mutex_lock(&priv->mutex);
6661         __iwl4965_down(priv);
6662         mutex_unlock(&priv->mutex);
6663
6664         iwl4965_cancel_deferred_work(priv);
6665 }
6666
6667 #define MAX_HW_RESTARTS 5
6668
6669 static int __iwl4965_up(struct iwl4965_priv *priv)
6670 {
6671         int rc, i;
6672
6673         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6674                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6675                 return -EIO;
6676         }
6677
6678         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6679                 IWL_WARNING("Radio disabled by SW RF kill (module "
6680                             "parameter)\n");
6681                 return -ENODEV;
6682         }
6683
6684         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
6685                 IWL_ERROR("ucode not available for device bringup\n");
6686                 return -EIO;
6687         }
6688
6689         /* If platform's RF_KILL switch is NOT set to KILL */
6690         if (iwl4965_read32(priv, CSR_GP_CNTRL) &
6691                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
6692                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
6693         else {
6694                 set_bit(STATUS_RF_KILL_HW, &priv->status);
6695                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
6696                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6697                         return -ENODEV;
6698                 }
6699         }
6700
6701         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6702
6703         rc = iwl4965_hw_nic_init(priv);
6704         if (rc) {
6705                 IWL_ERROR("Unable to int nic\n");
6706                 return rc;
6707         }
6708
6709         /* make sure rfkill handshake bits are cleared */
6710         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6711         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6712                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6713
6714         /* clear (again), then enable host interrupts */
6715         iwl4965_write32(priv, CSR_INT, 0xFFFFFFFF);
6716         iwl4965_enable_interrupts(priv);
6717
6718         /* really make sure rfkill handshake bits are cleared */
6719         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6720         iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6721
6722         /* Copy original ucode data image from disk into backup cache.
6723          * This will be used to initialize the on-board processor's
6724          * data SRAM for a clean start when the runtime program first loads. */
6725         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6726                priv->ucode_data.len);
6727
6728         /* We return success when we resume from suspend and rf_kill is on. */
6729         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
6730                 return 0;
6731
6732         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6733
6734                 iwl4965_clear_stations_table(priv);
6735
6736                 /* load bootstrap state machine,
6737                  * load bootstrap program into processor's memory,
6738                  * prepare to load the "initialize" uCode */
6739                 rc = iwl4965_load_bsm(priv);
6740
6741                 if (rc) {
6742                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6743                         continue;
6744                 }
6745
6746                 /* start card; "initialize" will load runtime ucode */
6747                 iwl4965_nic_start(priv);
6748
6749                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6750
6751                 return 0;
6752         }
6753
6754         set_bit(STATUS_EXIT_PENDING, &priv->status);
6755         __iwl4965_down(priv);
6756
6757         /* tried to restart and config the device for as long as our
6758          * patience could withstand */
6759         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6760         return -EIO;
6761 }
6762
6763
6764 /*****************************************************************************
6765  *
6766  * Workqueue callbacks
6767  *
6768  *****************************************************************************/
6769
6770 static void iwl4965_bg_init_alive_start(struct work_struct *data)
6771 {
6772         struct iwl4965_priv *priv =
6773             container_of(data, struct iwl4965_priv, init_alive_start.work);
6774
6775         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6776                 return;
6777
6778         mutex_lock(&priv->mutex);
6779         iwl4965_init_alive_start(priv);
6780         mutex_unlock(&priv->mutex);
6781 }
6782
6783 static void iwl4965_bg_alive_start(struct work_struct *data)
6784 {
6785         struct iwl4965_priv *priv =
6786             container_of(data, struct iwl4965_priv, alive_start.work);
6787
6788         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6789                 return;
6790
6791         mutex_lock(&priv->mutex);
6792         iwl4965_alive_start(priv);
6793         mutex_unlock(&priv->mutex);
6794 }
6795
6796 static void iwl4965_bg_rf_kill(struct work_struct *work)
6797 {
6798         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, rf_kill);
6799
6800         wake_up_interruptible(&priv->wait_command_queue);
6801
6802         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6803                 return;
6804
6805         mutex_lock(&priv->mutex);
6806
6807         if (!iwl4965_is_rfkill(priv)) {
6808                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6809                           "HW and/or SW RF Kill no longer active, restarting "
6810                           "device\n");
6811                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6812                         queue_work(priv->workqueue, &priv->restart);
6813         } else {
6814
6815                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6816                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6817                                           "disabled by SW switch\n");
6818                 else
6819                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6820                                     "Kill switch must be turned off for "
6821                                     "wireless networking to work.\n");
6822         }
6823         mutex_unlock(&priv->mutex);
6824 }
6825
6826 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6827
6828 static void iwl4965_bg_scan_check(struct work_struct *data)
6829 {
6830         struct iwl4965_priv *priv =
6831             container_of(data, struct iwl4965_priv, scan_check.work);
6832
6833         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6834                 return;
6835
6836         mutex_lock(&priv->mutex);
6837         if (test_bit(STATUS_SCANNING, &priv->status) ||
6838             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6839                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6840                           "Scan completion watchdog resetting adapter (%dms)\n",
6841                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6842
6843                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6844                         iwl4965_send_scan_abort(priv);
6845         }
6846         mutex_unlock(&priv->mutex);
6847 }
6848
6849 static void iwl4965_bg_request_scan(struct work_struct *data)
6850 {
6851         struct iwl4965_priv *priv =
6852             container_of(data, struct iwl4965_priv, request_scan);
6853         struct iwl4965_host_cmd cmd = {
6854                 .id = REPLY_SCAN_CMD,
6855                 .len = sizeof(struct iwl4965_scan_cmd),
6856                 .meta.flags = CMD_SIZE_HUGE,
6857         };
6858         int rc = 0;
6859         struct iwl4965_scan_cmd *scan;
6860         struct ieee80211_conf *conf = NULL;
6861         u16 cmd_len;
6862         enum ieee80211_band band;
6863         u8 direct_mask;
6864
6865         conf = ieee80211_get_hw_conf(priv->hw);
6866
6867         mutex_lock(&priv->mutex);
6868
6869         if (!iwl4965_is_ready(priv)) {
6870                 IWL_WARNING("request scan called when driver not ready.\n");
6871                 goto done;
6872         }
6873
6874         /* Make sure the scan wasn't cancelled before this queued work
6875          * was given the chance to run... */
6876         if (!test_bit(STATUS_SCANNING, &priv->status))
6877                 goto done;
6878
6879         /* This should never be called or scheduled if there is currently
6880          * a scan active in the hardware. */
6881         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6882                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6883                                "Ignoring second request.\n");
6884                 rc = -EIO;
6885                 goto done;
6886         }
6887
6888         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6889                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6890                 goto done;
6891         }
6892
6893         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6894                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6895                 goto done;
6896         }
6897
6898         if (iwl4965_is_rfkill(priv)) {
6899                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6900                 goto done;
6901         }
6902
6903         if (!test_bit(STATUS_READY, &priv->status)) {
6904                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6905                 goto done;
6906         }
6907
6908         if (!priv->scan_bands) {
6909                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6910                 goto done;
6911         }
6912
6913         if (!priv->scan) {
6914                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
6915                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6916                 if (!priv->scan) {
6917                         rc = -ENOMEM;
6918                         goto done;
6919                 }
6920         }
6921         scan = priv->scan;
6922         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
6923
6924         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6925         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6926
6927         if (iwl4965_is_associated(priv)) {
6928                 u16 interval = 0;
6929                 u32 extra;
6930                 u32 suspend_time = 100;
6931                 u32 scan_suspend_time = 100;
6932                 unsigned long flags;
6933
6934                 IWL_DEBUG_INFO("Scanning while associated...\n");
6935
6936                 spin_lock_irqsave(&priv->lock, flags);
6937                 interval = priv->beacon_int;
6938                 spin_unlock_irqrestore(&priv->lock, flags);
6939
6940                 scan->suspend_time = 0;
6941                 scan->max_out_time = cpu_to_le32(200 * 1024);
6942                 if (!interval)
6943                         interval = suspend_time;
6944
6945                 extra = (suspend_time / interval) << 22;
6946                 scan_suspend_time = (extra |
6947                     ((suspend_time % interval) * 1024));
6948                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6949                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6950                                scan_suspend_time, interval);
6951         }
6952
6953         /* We should add the ability for user to lock to PASSIVE ONLY */
6954         if (priv->one_direct_scan) {
6955                 IWL_DEBUG_SCAN
6956                     ("Kicking off one direct scan for '%s'\n",
6957                      iwl4965_escape_essid(priv->direct_ssid,
6958                                       priv->direct_ssid_len));
6959                 scan->direct_scan[0].id = WLAN_EID_SSID;
6960                 scan->direct_scan[0].len = priv->direct_ssid_len;
6961                 memcpy(scan->direct_scan[0].ssid,
6962                        priv->direct_ssid, priv->direct_ssid_len);
6963                 direct_mask = 1;
6964         } else if (!iwl4965_is_associated(priv) && priv->essid_len) {
6965                 scan->direct_scan[0].id = WLAN_EID_SSID;
6966                 scan->direct_scan[0].len = priv->essid_len;
6967                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6968                 direct_mask = 1;
6969         } else
6970                 direct_mask = 0;
6971
6972         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6973         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6974         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6975
6976
6977         switch (priv->scan_bands) {
6978         case 2:
6979                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6980                 scan->tx_cmd.rate_n_flags =
6981                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6982                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6983
6984                 scan->good_CRC_th = 0;
6985                 band = IEEE80211_BAND_2GHZ;
6986                 break;
6987
6988         case 1:
6989                 scan->tx_cmd.rate_n_flags =
6990                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6991                                 RATE_MCS_ANT_B_MSK);
6992                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6993                 band = IEEE80211_BAND_5GHZ;
6994                 break;
6995
6996         default:
6997                 IWL_WARNING("Invalid scan band count\n");
6998                 goto done;
6999         }
7000
7001         /* We don't build a direct scan probe request; the uCode will do
7002          * that based on the direct_mask added to each channel entry */
7003         cmd_len = iwl4965_fill_probe_req(priv, band,
7004                                         (struct ieee80211_mgmt *)scan->data,
7005                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
7006
7007         scan->tx_cmd.len = cpu_to_le16(cmd_len);
7008         /* select Rx chains */
7009
7010         /* Force use of chains B and C (0x6) for scan Rx.
7011          * Avoid A (0x1) because of its off-channel reception on A-band.
7012          * MIMO is not used here, but value is required to make uCode happy. */
7013         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7014                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7015                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7016                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7017
7018         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7019                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7020
7021         if (direct_mask)
7022                 IWL_DEBUG_SCAN
7023                     ("Initiating direct scan for %s.\n",
7024                      iwl4965_escape_essid(priv->essid, priv->essid_len));
7025         else
7026                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7027
7028         scan->channel_count =
7029                 iwl4965_get_channels_for_scan(
7030                         priv, band, 1, /* active */
7031                         direct_mask,
7032                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7033
7034         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7035             scan->channel_count * sizeof(struct iwl4965_scan_channel);
7036         cmd.data = scan;
7037         scan->len = cpu_to_le16(cmd.len);
7038
7039         set_bit(STATUS_SCAN_HW, &priv->status);
7040         rc = iwl4965_send_cmd_sync(priv, &cmd);
7041         if (rc)
7042                 goto done;
7043
7044         queue_delayed_work(priv->workqueue, &priv->scan_check,
7045                            IWL_SCAN_CHECK_WATCHDOG);
7046
7047         mutex_unlock(&priv->mutex);
7048         return;
7049
7050  done:
7051         /* inform mac80211 scan aborted */
7052         queue_work(priv->workqueue, &priv->scan_completed);
7053         mutex_unlock(&priv->mutex);
7054 }
7055
7056 static void iwl4965_bg_up(struct work_struct *data)
7057 {
7058         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, up);
7059
7060         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7061                 return;
7062
7063         mutex_lock(&priv->mutex);
7064         __iwl4965_up(priv);
7065         mutex_unlock(&priv->mutex);
7066 }
7067
7068 static void iwl4965_bg_restart(struct work_struct *data)
7069 {
7070         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv, restart);
7071
7072         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7073                 return;
7074
7075         iwl4965_down(priv);
7076         queue_work(priv->workqueue, &priv->up);
7077 }
7078
7079 static void iwl4965_bg_rx_replenish(struct work_struct *data)
7080 {
7081         struct iwl4965_priv *priv =
7082             container_of(data, struct iwl4965_priv, rx_replenish);
7083
7084         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7085                 return;
7086
7087         mutex_lock(&priv->mutex);
7088         iwl4965_rx_replenish(priv);
7089         mutex_unlock(&priv->mutex);
7090 }
7091
7092 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7093
7094 static void iwl4965_bg_post_associate(struct work_struct *data)
7095 {
7096         struct iwl4965_priv *priv = container_of(data, struct iwl4965_priv,
7097                                              post_associate.work);
7098
7099         int rc = 0;
7100         struct ieee80211_conf *conf = NULL;
7101         DECLARE_MAC_BUF(mac);
7102
7103         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7104                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7105                 return;
7106         }
7107
7108         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7109                         priv->assoc_id,
7110                         print_mac(mac, priv->active_rxon.bssid_addr));
7111
7112
7113         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7114                 return;
7115
7116         mutex_lock(&priv->mutex);
7117
7118         if (!priv->vif || !priv->is_open) {
7119                 mutex_unlock(&priv->mutex);
7120                 return;
7121         }
7122         iwl4965_scan_cancel_timeout(priv, 200);
7123
7124         conf = ieee80211_get_hw_conf(priv->hw);
7125
7126         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7127         iwl4965_commit_rxon(priv);
7128
7129         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7130         iwl4965_setup_rxon_timing(priv);
7131         rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7132                               sizeof(priv->rxon_timing), &priv->rxon_timing);
7133         if (rc)
7134                 IWL_WARNING("REPLY_RXON_TIMING failed - "
7135                             "Attempting to continue.\n");
7136
7137         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7138
7139 #ifdef CONFIG_IWL4965_HT
7140         if (priv->current_ht_config.is_ht)
7141                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
7142 #endif /* CONFIG_IWL4965_HT*/
7143         iwl4965_set_rxon_chain(priv);
7144         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7145
7146         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7147                         priv->assoc_id, priv->beacon_int);
7148
7149         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7150                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7151         else
7152                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7153
7154         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7155                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7156                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7157                 else
7158                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7159
7160                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7161                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7162
7163         }
7164
7165         iwl4965_commit_rxon(priv);
7166
7167         switch (priv->iw_mode) {
7168         case IEEE80211_IF_TYPE_STA:
7169                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
7170                 break;
7171
7172         case IEEE80211_IF_TYPE_IBSS:
7173
7174                 /* clear out the station table */
7175                 iwl4965_clear_stations_table(priv);
7176
7177                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7178                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
7179                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
7180                 iwl4965_send_beacon_cmd(priv);
7181
7182                 break;
7183
7184         default:
7185                 IWL_ERROR("%s Should not be called in %d mode\n",
7186                                 __FUNCTION__, priv->iw_mode);
7187                 break;
7188         }
7189
7190         iwl4965_sequence_reset(priv);
7191
7192 #ifdef CONFIG_IWL4965_SENSITIVITY
7193         /* Enable Rx differential gain and sensitivity calibrations */
7194         iwl4965_chain_noise_reset(priv);
7195         priv->start_calib = 1;
7196 #endif /* CONFIG_IWL4965_SENSITIVITY */
7197
7198         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7199                 priv->assoc_station_added = 1;
7200
7201         iwl4965_activate_qos(priv, 0);
7202
7203         /* we have just associated, don't start scan too early */
7204         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
7205         mutex_unlock(&priv->mutex);
7206 }
7207
7208 static void iwl4965_bg_abort_scan(struct work_struct *work)
7209 {
7210         struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv, abort_scan);
7211
7212         if (!iwl4965_is_ready(priv))
7213                 return;
7214
7215         mutex_lock(&priv->mutex);
7216
7217         set_bit(STATUS_SCAN_ABORTING, &priv->status);
7218         iwl4965_send_scan_abort(priv);
7219
7220         mutex_unlock(&priv->mutex);
7221 }
7222
7223 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
7224
7225 static void iwl4965_bg_scan_completed(struct work_struct *work)
7226 {
7227         struct iwl4965_priv *priv =
7228             container_of(work, struct iwl4965_priv, scan_completed);
7229
7230         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7231
7232         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7233                 return;
7234
7235         if (test_bit(STATUS_CONF_PENDING, &priv->status))
7236                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
7237
7238         ieee80211_scan_completed(priv->hw);
7239
7240         /* Since setting the TXPOWER may have been deferred while
7241          * performing the scan, fire one off */
7242         mutex_lock(&priv->mutex);
7243         iwl4965_hw_reg_send_txpower(priv);
7244         mutex_unlock(&priv->mutex);
7245 }
7246
7247 /*****************************************************************************
7248  *
7249  * mac80211 entry point functions
7250  *
7251  *****************************************************************************/
7252
7253 #define UCODE_READY_TIMEOUT     (2 * HZ)
7254
7255 static int iwl4965_mac_start(struct ieee80211_hw *hw)
7256 {
7257         struct iwl4965_priv *priv = hw->priv;
7258         int ret;
7259
7260         IWL_DEBUG_MAC80211("enter\n");
7261
7262         if (pci_enable_device(priv->pci_dev)) {
7263                 IWL_ERROR("Fail to pci_enable_device\n");
7264                 return -ENODEV;
7265         }
7266         pci_restore_state(priv->pci_dev);
7267         pci_enable_msi(priv->pci_dev);
7268
7269         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
7270                           DRV_NAME, priv);
7271         if (ret) {
7272                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
7273                 goto out_disable_msi;
7274         }
7275
7276         /* we should be verifying the device is ready to be opened */
7277         mutex_lock(&priv->mutex);
7278
7279         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
7280         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
7281          * ucode filename and max sizes are card-specific. */
7282
7283         if (!priv->ucode_code.len) {
7284                 ret = iwl4965_read_ucode(priv);
7285                 if (ret) {
7286                         IWL_ERROR("Could not read microcode: %d\n", ret);
7287                         mutex_unlock(&priv->mutex);
7288                         goto out_release_irq;
7289                 }
7290         }
7291
7292         ret = __iwl4965_up(priv);
7293
7294         mutex_unlock(&priv->mutex);
7295
7296         if (ret)
7297                 goto out_release_irq;
7298
7299         IWL_DEBUG_INFO("Start UP work done.\n");
7300
7301         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
7302                 return 0;
7303
7304         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
7305          * mac80211 will not be run successfully. */
7306         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
7307                         test_bit(STATUS_READY, &priv->status),
7308                         UCODE_READY_TIMEOUT);
7309         if (!ret) {
7310                 if (!test_bit(STATUS_READY, &priv->status)) {
7311                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
7312                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
7313                         ret = -ETIMEDOUT;
7314                         goto out_release_irq;
7315                 }
7316         }
7317
7318         priv->is_open = 1;
7319         IWL_DEBUG_MAC80211("leave\n");
7320         return 0;
7321
7322 out_release_irq:
7323         free_irq(priv->pci_dev->irq, priv);
7324 out_disable_msi:
7325         pci_disable_msi(priv->pci_dev);
7326         pci_disable_device(priv->pci_dev);
7327         priv->is_open = 0;
7328         IWL_DEBUG_MAC80211("leave - failed\n");
7329         return ret;
7330 }
7331
7332 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
7333 {
7334         struct iwl4965_priv *priv = hw->priv;
7335
7336         IWL_DEBUG_MAC80211("enter\n");
7337
7338         if (!priv->is_open) {
7339                 IWL_DEBUG_MAC80211("leave - skip\n");
7340                 return;
7341         }
7342
7343         priv->is_open = 0;
7344
7345         if (iwl4965_is_ready_rf(priv)) {
7346                 /* stop mac, cancel any scan request and clear
7347                  * RXON_FILTER_ASSOC_MSK BIT
7348                  */
7349                 mutex_lock(&priv->mutex);
7350                 iwl4965_scan_cancel_timeout(priv, 100);
7351                 cancel_delayed_work(&priv->post_associate);
7352                 mutex_unlock(&priv->mutex);
7353         }
7354
7355         iwl4965_down(priv);
7356
7357         flush_workqueue(priv->workqueue);
7358         free_irq(priv->pci_dev->irq, priv);
7359         pci_disable_msi(priv->pci_dev);
7360         pci_save_state(priv->pci_dev);
7361         pci_disable_device(priv->pci_dev);
7362
7363         IWL_DEBUG_MAC80211("leave\n");
7364 }
7365
7366 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7367                       struct ieee80211_tx_control *ctl)
7368 {
7369         struct iwl4965_priv *priv = hw->priv;
7370
7371         IWL_DEBUG_MAC80211("enter\n");
7372
7373         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7374                 IWL_DEBUG_MAC80211("leave - monitor\n");
7375                 return -1;
7376         }
7377
7378         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7379                      ctl->tx_rate->bitrate);
7380
7381         if (iwl4965_tx_skb(priv, skb, ctl))
7382                 dev_kfree_skb_any(skb);
7383
7384         IWL_DEBUG_MAC80211("leave\n");
7385         return 0;
7386 }
7387
7388 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
7389                                  struct ieee80211_if_init_conf *conf)
7390 {
7391         struct iwl4965_priv *priv = hw->priv;
7392         unsigned long flags;
7393         DECLARE_MAC_BUF(mac);
7394
7395         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
7396
7397         if (priv->vif) {
7398                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
7399                 return -EOPNOTSUPP;
7400         }
7401
7402         spin_lock_irqsave(&priv->lock, flags);
7403         priv->vif = conf->vif;
7404
7405         spin_unlock_irqrestore(&priv->lock, flags);
7406
7407         mutex_lock(&priv->mutex);
7408
7409         if (conf->mac_addr) {
7410                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7411                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7412         }
7413
7414         if (iwl4965_is_ready(priv))
7415                 iwl4965_set_mode(priv, conf->type);
7416
7417         mutex_unlock(&priv->mutex);
7418
7419         IWL_DEBUG_MAC80211("leave\n");
7420         return 0;
7421 }
7422
7423 /**
7424  * iwl4965_mac_config - mac80211 config callback
7425  *
7426  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7427  * be set inappropriately and the driver currently sets the hardware up to
7428  * use it whenever needed.
7429  */
7430 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7431 {
7432         struct iwl4965_priv *priv = hw->priv;
7433         const struct iwl4965_channel_info *ch_info;
7434         unsigned long flags;
7435         int ret = 0;
7436
7437         mutex_lock(&priv->mutex);
7438         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
7439
7440         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
7441
7442         if (!iwl4965_is_ready(priv)) {
7443                 IWL_DEBUG_MAC80211("leave - not ready\n");
7444                 ret = -EIO;
7445                 goto out;
7446         }
7447
7448         if (unlikely(!iwl4965_param_disable_hw_scan &&
7449                      test_bit(STATUS_SCANNING, &priv->status))) {
7450                 IWL_DEBUG_MAC80211("leave - scanning\n");
7451                 set_bit(STATUS_CONF_PENDING, &priv->status);
7452                 mutex_unlock(&priv->mutex);
7453                 return 0;
7454         }
7455
7456         spin_lock_irqsave(&priv->lock, flags);
7457
7458         ch_info = iwl4965_get_channel_info(priv, conf->channel->band,
7459                         ieee80211_frequency_to_channel(conf->channel->center_freq));
7460         if (!is_channel_valid(ch_info)) {
7461                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7462                 spin_unlock_irqrestore(&priv->lock, flags);
7463                 ret = -EINVAL;
7464                 goto out;
7465         }
7466
7467 #ifdef CONFIG_IWL4965_HT
7468         /* if we are switching from ht to 2.4 clear flags
7469          * from any ht related info since 2.4 does not
7470          * support ht */
7471         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
7472 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7473             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7474 #endif
7475         )
7476                 priv->staging_rxon.flags = 0;
7477 #endif /* CONFIG_IWL4965_HT */
7478
7479         iwl4965_set_rxon_channel(priv, conf->channel->band,
7480                 ieee80211_frequency_to_channel(conf->channel->center_freq));
7481
7482         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
7483
7484         /* The list of supported rates and rate mask can be different
7485          * for each band; since the band may have changed, reset
7486          * the rate mask to what mac80211 lists */
7487         iwl4965_set_rate(priv);
7488
7489         spin_unlock_irqrestore(&priv->lock, flags);
7490
7491 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7492         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7493                 iwl4965_hw_channel_switch(priv, conf->channel);
7494                 goto out;
7495         }
7496 #endif
7497
7498         iwl4965_radio_kill_sw(priv, !conf->radio_enabled);
7499
7500         if (!conf->radio_enabled) {
7501                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7502                 goto out;
7503         }
7504
7505         if (iwl4965_is_rfkill(priv)) {
7506                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7507                 ret = -EIO;
7508                 goto out;
7509         }
7510
7511         iwl4965_set_rate(priv);
7512
7513         if (memcmp(&priv->active_rxon,
7514                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7515                 iwl4965_commit_rxon(priv);
7516         else
7517                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7518
7519         IWL_DEBUG_MAC80211("leave\n");
7520
7521 out:
7522         clear_bit(STATUS_CONF_PENDING, &priv->status);
7523         mutex_unlock(&priv->mutex);
7524         return ret;
7525 }
7526
7527 static void iwl4965_config_ap(struct iwl4965_priv *priv)
7528 {
7529         int rc = 0;
7530
7531         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7532                 return;
7533
7534         /* The following should be done only at AP bring up */
7535         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7536
7537                 /* RXON - unassoc (to set timing command) */
7538                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7539                 iwl4965_commit_rxon(priv);
7540
7541                 /* RXON Timing */
7542                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
7543                 iwl4965_setup_rxon_timing(priv);
7544                 rc = iwl4965_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7545                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7546                 if (rc)
7547                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7548                                         "Attempting to continue.\n");
7549
7550                 iwl4965_set_rxon_chain(priv);
7551
7552                 /* FIXME: what should be the assoc_id for AP? */
7553                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7554                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7555                         priv->staging_rxon.flags |=
7556                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7557                 else
7558                         priv->staging_rxon.flags &=
7559                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7560
7561                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7562                         if (priv->assoc_capability &
7563                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7564                                 priv->staging_rxon.flags |=
7565                                         RXON_FLG_SHORT_SLOT_MSK;
7566                         else
7567                                 priv->staging_rxon.flags &=
7568                                         ~RXON_FLG_SHORT_SLOT_MSK;
7569
7570                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7571                                 priv->staging_rxon.flags &=
7572                                         ~RXON_FLG_SHORT_SLOT_MSK;
7573                 }
7574                 /* restore RXON assoc */
7575                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7576                 iwl4965_commit_rxon(priv);
7577                 iwl4965_activate_qos(priv, 1);
7578                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
7579         }
7580         iwl4965_send_beacon_cmd(priv);
7581
7582         /* FIXME - we need to add code here to detect a totally new
7583          * configuration, reset the AP, unassoc, rxon timing, assoc,
7584          * clear sta table, add BCAST sta... */
7585 }
7586
7587 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
7588                                         struct ieee80211_vif *vif,
7589                                     struct ieee80211_if_conf *conf)
7590 {
7591         struct iwl4965_priv *priv = hw->priv;
7592         DECLARE_MAC_BUF(mac);
7593         unsigned long flags;
7594         int rc;
7595
7596         if (conf == NULL)
7597                 return -EIO;
7598
7599         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7600             (!conf->beacon || !conf->ssid_len)) {
7601                 IWL_DEBUG_MAC80211
7602                     ("Leaving in AP mode because HostAPD is not ready.\n");
7603                 return 0;
7604         }
7605
7606         if (!iwl4965_is_alive(priv))
7607                 return -EAGAIN;
7608
7609         mutex_lock(&priv->mutex);
7610
7611         if (conf->bssid)
7612                 IWL_DEBUG_MAC80211("bssid: %s\n",
7613                                    print_mac(mac, conf->bssid));
7614
7615 /*
7616  * very dubious code was here; the probe filtering flag is never set:
7617  *
7618         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7619             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7620  */
7621         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7622                 IWL_DEBUG_MAC80211("leave - scanning\n");
7623                 mutex_unlock(&priv->mutex);
7624                 return 0;
7625         }
7626
7627         if (priv->vif != vif) {
7628                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
7629                 mutex_unlock(&priv->mutex);
7630                 return 0;
7631         }
7632
7633         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7634                 if (!conf->bssid) {
7635                         conf->bssid = priv->mac_addr;
7636                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7637                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7638                                            print_mac(mac, conf->bssid));
7639                 }
7640                 if (priv->ibss_beacon)
7641                         dev_kfree_skb(priv->ibss_beacon);
7642
7643                 priv->ibss_beacon = conf->beacon;
7644         }
7645
7646         if (iwl4965_is_rfkill(priv))
7647                 goto done;
7648
7649         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7650             !is_multicast_ether_addr(conf->bssid)) {
7651                 /* If there is currently a HW scan going on in the background
7652                  * then we need to cancel it else the RXON below will fail. */
7653                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
7654                         IWL_WARNING("Aborted scan still in progress "
7655                                     "after 100ms\n");
7656                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7657                         mutex_unlock(&priv->mutex);
7658                         return -EAGAIN;
7659                 }
7660                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7661
7662                 /* TODO: Audit driver for usage of these members and see
7663                  * if mac80211 deprecates them (priv->bssid looks like it
7664                  * shouldn't be there, but I haven't scanned the IBSS code
7665                  * to verify) - jpk */
7666                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7667
7668                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7669                         iwl4965_config_ap(priv);
7670                 else {
7671                         rc = iwl4965_commit_rxon(priv);
7672                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7673                                 iwl4965_rxon_add_station(
7674                                         priv, priv->active_rxon.bssid_addr, 1);
7675                 }
7676
7677         } else {
7678                 iwl4965_scan_cancel_timeout(priv, 100);
7679                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7680                 iwl4965_commit_rxon(priv);
7681         }
7682
7683  done:
7684         spin_lock_irqsave(&priv->lock, flags);
7685         if (!conf->ssid_len)
7686                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7687         else
7688                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7689
7690         priv->essid_len = conf->ssid_len;
7691         spin_unlock_irqrestore(&priv->lock, flags);
7692
7693         IWL_DEBUG_MAC80211("leave\n");
7694         mutex_unlock(&priv->mutex);
7695
7696         return 0;
7697 }
7698
7699 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
7700                                  unsigned int changed_flags,
7701                                  unsigned int *total_flags,
7702                                  int mc_count, struct dev_addr_list *mc_list)
7703 {
7704         /*
7705          * XXX: dummy
7706          * see also iwl4965_connection_init_rx_config
7707          */
7708         *total_flags = 0;
7709 }
7710
7711 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
7712                                      struct ieee80211_if_init_conf *conf)
7713 {
7714         struct iwl4965_priv *priv = hw->priv;
7715
7716         IWL_DEBUG_MAC80211("enter\n");
7717
7718         mutex_lock(&priv->mutex);
7719
7720         if (iwl4965_is_ready_rf(priv)) {
7721                 iwl4965_scan_cancel_timeout(priv, 100);
7722                 cancel_delayed_work(&priv->post_associate);
7723                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7724                 iwl4965_commit_rxon(priv);
7725         }
7726         if (priv->vif == conf->vif) {
7727                 priv->vif = NULL;
7728                 memset(priv->bssid, 0, ETH_ALEN);
7729                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7730                 priv->essid_len = 0;
7731         }
7732         mutex_unlock(&priv->mutex);
7733
7734         IWL_DEBUG_MAC80211("leave\n");
7735
7736 }
7737
7738 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
7739                                      struct ieee80211_vif *vif,
7740                                      struct ieee80211_bss_conf *bss_conf,
7741                                      u32 changes)
7742 {
7743         struct iwl4965_priv *priv = hw->priv;
7744
7745         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
7746                 if (bss_conf->use_short_preamble)
7747                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7748                 else
7749                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7750         }
7751
7752         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
7753                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
7754                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
7755                 else
7756                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
7757         }
7758
7759         if (changes & BSS_CHANGED_ASSOC) {
7760                 /*
7761                  * TODO:
7762                  * do stuff instead of sniffing assoc resp
7763                  */
7764         }
7765
7766         if (iwl4965_is_associated(priv))
7767                 iwl4965_send_rxon_assoc(priv);
7768 }
7769
7770 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7771 {
7772         int rc = 0;
7773         unsigned long flags;
7774         struct iwl4965_priv *priv = hw->priv;
7775
7776         IWL_DEBUG_MAC80211("enter\n");
7777
7778         mutex_lock(&priv->mutex);
7779         spin_lock_irqsave(&priv->lock, flags);
7780
7781         if (!iwl4965_is_ready_rf(priv)) {
7782                 rc = -EIO;
7783                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7784                 goto out_unlock;
7785         }
7786
7787         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7788                 rc = -EIO;
7789                 IWL_ERROR("ERROR: APs don't scan\n");
7790                 goto out_unlock;
7791         }
7792
7793         /* we don't schedule scan within next_scan_jiffies period */
7794         if (priv->next_scan_jiffies &&
7795                         time_after(priv->next_scan_jiffies, jiffies)) {
7796                 rc = -EAGAIN;
7797                 goto out_unlock;
7798         }
7799         /* if we just finished scan ask for delay */
7800         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
7801                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
7802                 rc = -EAGAIN;
7803                 goto out_unlock;
7804         }
7805         if (len) {
7806                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
7807                                iwl4965_escape_essid(ssid, len), (int)len);
7808
7809                 priv->one_direct_scan = 1;
7810                 priv->direct_ssid_len = (u8)
7811                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7812                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7813         } else
7814                 priv->one_direct_scan = 0;
7815
7816         rc = iwl4965_scan_initiate(priv);
7817
7818         IWL_DEBUG_MAC80211("leave\n");
7819
7820 out_unlock:
7821         spin_unlock_irqrestore(&priv->lock, flags);
7822         mutex_unlock(&priv->mutex);
7823
7824         return rc;
7825 }
7826
7827 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7828                            const u8 *local_addr, const u8 *addr,
7829                            struct ieee80211_key_conf *key)
7830 {
7831         struct iwl4965_priv *priv = hw->priv;
7832         DECLARE_MAC_BUF(mac);
7833         int rc = 0;
7834         u8 sta_id;
7835
7836         IWL_DEBUG_MAC80211("enter\n");
7837
7838         if (!iwl4965_param_hwcrypto) {
7839                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7840                 return -EOPNOTSUPP;
7841         }
7842
7843         if (is_zero_ether_addr(addr))
7844                 /* only support pairwise keys */
7845                 return -EOPNOTSUPP;
7846
7847         sta_id = iwl4965_hw_find_station(priv, addr);
7848         if (sta_id == IWL_INVALID_STATION) {
7849                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7850                                    print_mac(mac, addr));
7851                 return -EINVAL;
7852         }
7853
7854         mutex_lock(&priv->mutex);
7855
7856         iwl4965_scan_cancel_timeout(priv, 100);
7857
7858         switch (cmd) {
7859         case  SET_KEY:
7860                 rc = iwl4965_update_sta_key_info(priv, key, sta_id);
7861                 if (!rc) {
7862                         iwl4965_set_rxon_hwcrypto(priv, 1);
7863                         iwl4965_commit_rxon(priv);
7864                         key->hw_key_idx = sta_id;
7865                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7866                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7867                 }
7868                 break;
7869         case DISABLE_KEY:
7870                 rc = iwl4965_clear_sta_key_info(priv, sta_id);
7871                 if (!rc) {
7872                         iwl4965_set_rxon_hwcrypto(priv, 0);
7873                         iwl4965_commit_rxon(priv);
7874                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7875                 }
7876                 break;
7877         default:
7878                 rc = -EINVAL;
7879         }
7880
7881         IWL_DEBUG_MAC80211("leave\n");
7882         mutex_unlock(&priv->mutex);
7883
7884         return rc;
7885 }
7886
7887 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7888                            const struct ieee80211_tx_queue_params *params)
7889 {
7890         struct iwl4965_priv *priv = hw->priv;
7891         unsigned long flags;
7892         int q;
7893
7894         IWL_DEBUG_MAC80211("enter\n");
7895
7896         if (!iwl4965_is_ready_rf(priv)) {
7897                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7898                 return -EIO;
7899         }
7900
7901         if (queue >= AC_NUM) {
7902                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7903                 return 0;
7904         }
7905
7906         if (!priv->qos_data.qos_enable) {
7907                 priv->qos_data.qos_active = 0;
7908                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7909                 return 0;
7910         }
7911         q = AC_NUM - 1 - queue;
7912
7913         spin_lock_irqsave(&priv->lock, flags);
7914
7915         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7916         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7917         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7918         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7919                         cpu_to_le16((params->burst_time * 100));
7920
7921         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7922         priv->qos_data.qos_active = 1;
7923
7924         spin_unlock_irqrestore(&priv->lock, flags);
7925
7926         mutex_lock(&priv->mutex);
7927         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7928                 iwl4965_activate_qos(priv, 1);
7929         else if (priv->assoc_id && iwl4965_is_associated(priv))
7930                 iwl4965_activate_qos(priv, 0);
7931
7932         mutex_unlock(&priv->mutex);
7933
7934         IWL_DEBUG_MAC80211("leave\n");
7935         return 0;
7936 }
7937
7938 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
7939                                 struct ieee80211_tx_queue_stats *stats)
7940 {
7941         struct iwl4965_priv *priv = hw->priv;
7942         int i, avail;
7943         struct iwl4965_tx_queue *txq;
7944         struct iwl4965_queue *q;
7945         unsigned long flags;
7946
7947         IWL_DEBUG_MAC80211("enter\n");
7948
7949         if (!iwl4965_is_ready_rf(priv)) {
7950                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7951                 return -EIO;
7952         }
7953
7954         spin_lock_irqsave(&priv->lock, flags);
7955
7956         for (i = 0; i < AC_NUM; i++) {
7957                 txq = &priv->txq[i];
7958                 q = &txq->q;
7959                 avail = iwl4965_queue_space(q);
7960
7961                 stats->data[i].len = q->n_window - avail;
7962                 stats->data[i].limit = q->n_window - q->high_mark;
7963                 stats->data[i].count = q->n_window;
7964
7965         }
7966         spin_unlock_irqrestore(&priv->lock, flags);
7967
7968         IWL_DEBUG_MAC80211("leave\n");
7969
7970         return 0;
7971 }
7972
7973 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
7974                              struct ieee80211_low_level_stats *stats)
7975 {
7976         IWL_DEBUG_MAC80211("enter\n");
7977         IWL_DEBUG_MAC80211("leave\n");
7978
7979         return 0;
7980 }
7981
7982 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
7983 {
7984         IWL_DEBUG_MAC80211("enter\n");
7985         IWL_DEBUG_MAC80211("leave\n");
7986
7987         return 0;
7988 }
7989
7990 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7991 {
7992         struct iwl4965_priv *priv = hw->priv;
7993         unsigned long flags;
7994
7995         mutex_lock(&priv->mutex);
7996         IWL_DEBUG_MAC80211("enter\n");
7997
7998         priv->lq_mngr.lq_ready = 0;
7999 #ifdef CONFIG_IWL4965_HT
8000         spin_lock_irqsave(&priv->lock, flags);
8001         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
8002         spin_unlock_irqrestore(&priv->lock, flags);
8003 #endif /* CONFIG_IWL4965_HT */
8004
8005         iwl4965_reset_qos(priv);
8006
8007         cancel_delayed_work(&priv->post_associate);
8008
8009         spin_lock_irqsave(&priv->lock, flags);
8010         priv->assoc_id = 0;
8011         priv->assoc_capability = 0;
8012         priv->call_post_assoc_from_beacon = 0;
8013         priv->assoc_station_added = 0;
8014
8015         /* new association get rid of ibss beacon skb */
8016         if (priv->ibss_beacon)
8017                 dev_kfree_skb(priv->ibss_beacon);
8018
8019         priv->ibss_beacon = NULL;
8020
8021         priv->beacon_int = priv->hw->conf.beacon_int;
8022         priv->timestamp1 = 0;
8023         priv->timestamp0 = 0;
8024         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
8025                 priv->beacon_int = 0;
8026
8027         spin_unlock_irqrestore(&priv->lock, flags);
8028
8029         if (!iwl4965_is_ready_rf(priv)) {
8030                 IWL_DEBUG_MAC80211("leave - not ready\n");
8031                 mutex_unlock(&priv->mutex);
8032                 return;
8033         }
8034
8035         /* we are restarting association process
8036          * clear RXON_FILTER_ASSOC_MSK bit
8037          */
8038         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
8039                 iwl4965_scan_cancel_timeout(priv, 100);
8040                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
8041                 iwl4965_commit_rxon(priv);
8042         }
8043
8044         /* Per mac80211.h: This is only used in IBSS mode... */
8045         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8046
8047                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
8048                 mutex_unlock(&priv->mutex);
8049                 return;
8050         }
8051
8052         priv->only_active_channel = 0;
8053
8054         iwl4965_set_rate(priv);
8055
8056         mutex_unlock(&priv->mutex);
8057
8058         IWL_DEBUG_MAC80211("leave\n");
8059 }
8060
8061 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
8062                                  struct ieee80211_tx_control *control)
8063 {
8064         struct iwl4965_priv *priv = hw->priv;
8065         unsigned long flags;
8066
8067         mutex_lock(&priv->mutex);
8068         IWL_DEBUG_MAC80211("enter\n");
8069
8070         if (!iwl4965_is_ready_rf(priv)) {
8071                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
8072                 mutex_unlock(&priv->mutex);
8073                 return -EIO;
8074         }
8075
8076         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
8077                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
8078                 mutex_unlock(&priv->mutex);
8079                 return -EIO;
8080         }
8081
8082         spin_lock_irqsave(&priv->lock, flags);
8083
8084         if (priv->ibss_beacon)
8085                 dev_kfree_skb(priv->ibss_beacon);
8086
8087         priv->ibss_beacon = skb;
8088
8089         priv->assoc_id = 0;
8090
8091         IWL_DEBUG_MAC80211("leave\n");
8092         spin_unlock_irqrestore(&priv->lock, flags);
8093
8094         iwl4965_reset_qos(priv);
8095
8096         queue_work(priv->workqueue, &priv->post_associate.work);
8097
8098         mutex_unlock(&priv->mutex);
8099
8100         return 0;
8101 }
8102
8103 #ifdef CONFIG_IWL4965_HT
8104
8105 static void iwl4965_ht_info_fill(struct ieee80211_conf *conf,
8106                                  struct iwl4965_priv *priv)
8107 {
8108         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
8109         struct ieee80211_ht_info *ht_conf = &conf->ht_conf;
8110         struct ieee80211_ht_bss_info *ht_bss_conf = &conf->ht_bss_conf;
8111
8112         IWL_DEBUG_MAC80211("enter: \n");
8113
8114         if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) {
8115                 iwl_conf->is_ht = 0;
8116                 return;
8117         }
8118
8119         iwl_conf->is_ht = 1;
8120         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
8121
8122         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
8123                 iwl_conf->sgf |= 0x1;
8124         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
8125                 iwl_conf->sgf |= 0x2;
8126
8127         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
8128         iwl_conf->max_amsdu_size =
8129                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
8130         iwl_conf->supported_chan_width =
8131                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
8132         iwl_conf->tx_mimo_ps_mode =
8133                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
8134         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
8135
8136         iwl_conf->control_channel = ht_bss_conf->primary_channel;
8137         iwl_conf->extension_chan_offset =
8138                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
8139         iwl_conf->tx_chan_width =
8140                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
8141         iwl_conf->ht_protection =
8142                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
8143         iwl_conf->non_GF_STA_present =
8144                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
8145
8146         IWL_DEBUG_MAC80211("control channel %d\n",
8147                 iwl_conf->control_channel);
8148         IWL_DEBUG_MAC80211("leave\n");
8149 }
8150
8151 static int iwl4965_mac_conf_ht(struct ieee80211_hw *hw,
8152                                struct ieee80211_conf *conf)
8153 {
8154         struct iwl4965_priv *priv = hw->priv;
8155
8156         IWL_DEBUG_MAC80211("enter: \n");
8157
8158         iwl4965_ht_info_fill(conf, priv);
8159         iwl4965_set_rxon_chain(priv);
8160
8161         if (priv && priv->assoc_id &&
8162             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8163                 unsigned long flags;
8164
8165                 spin_lock_irqsave(&priv->lock, flags);
8166                 if (priv->beacon_int)
8167                         queue_work(priv->workqueue, &priv->post_associate.work);
8168                 else
8169                         priv->call_post_assoc_from_beacon = 1;
8170                 spin_unlock_irqrestore(&priv->lock, flags);
8171         }
8172
8173         IWL_DEBUG_MAC80211("leave:\n");
8174         return 0;
8175 }
8176
8177 #endif /*CONFIG_IWL4965_HT*/
8178
8179 /*****************************************************************************
8180  *
8181  * sysfs attributes
8182  *
8183  *****************************************************************************/
8184
8185 #ifdef CONFIG_IWL4965_DEBUG
8186
8187 /*
8188  * The following adds a new attribute to the sysfs representation
8189  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8190  * used for controlling the debug level.
8191  *
8192  * See the level definitions in iwl for details.
8193  */
8194
8195 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8196 {
8197         return sprintf(buf, "0x%08X\n", iwl4965_debug_level);
8198 }
8199 static ssize_t store_debug_level(struct device_driver *d,
8200                                  const char *buf, size_t count)
8201 {
8202         char *p = (char *)buf;
8203         u32 val;
8204
8205         val = simple_strtoul(p, &p, 0);
8206         if (p == buf)
8207                 printk(KERN_INFO DRV_NAME
8208                        ": %s is not in hex or decimal form.\n", buf);
8209         else
8210                 iwl4965_debug_level = val;
8211
8212         return strnlen(buf, count);
8213 }
8214
8215 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8216                    show_debug_level, store_debug_level);
8217
8218 #endif /* CONFIG_IWL4965_DEBUG */
8219
8220 static ssize_t show_rf_kill(struct device *d,
8221                             struct device_attribute *attr, char *buf)
8222 {
8223         /*
8224          * 0 - RF kill not enabled
8225          * 1 - SW based RF kill active (sysfs)
8226          * 2 - HW based RF kill active
8227          * 3 - Both HW and SW based RF kill active
8228          */
8229         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8230         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8231                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8232
8233         return sprintf(buf, "%i\n", val);
8234 }
8235
8236 static ssize_t store_rf_kill(struct device *d,
8237                              struct device_attribute *attr,
8238                              const char *buf, size_t count)
8239 {
8240         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8241
8242         mutex_lock(&priv->mutex);
8243         iwl4965_radio_kill_sw(priv, buf[0] == '1');
8244         mutex_unlock(&priv->mutex);
8245
8246         return count;
8247 }
8248
8249 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8250
8251 static ssize_t show_temperature(struct device *d,
8252                                 struct device_attribute *attr, char *buf)
8253 {
8254         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8255
8256         if (!iwl4965_is_alive(priv))
8257                 return -EAGAIN;
8258
8259         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
8260 }
8261
8262 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8263
8264 static ssize_t show_rs_window(struct device *d,
8265                               struct device_attribute *attr,
8266                               char *buf)
8267 {
8268         struct iwl4965_priv *priv = d->driver_data;
8269         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8270 }
8271 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8272
8273 static ssize_t show_tx_power(struct device *d,
8274                              struct device_attribute *attr, char *buf)
8275 {
8276         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8277         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8278 }
8279
8280 static ssize_t store_tx_power(struct device *d,
8281                               struct device_attribute *attr,
8282                               const char *buf, size_t count)
8283 {
8284         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8285         char *p = (char *)buf;
8286         u32 val;
8287
8288         val = simple_strtoul(p, &p, 10);
8289         if (p == buf)
8290                 printk(KERN_INFO DRV_NAME
8291                        ": %s is not in decimal form.\n", buf);
8292         else
8293                 iwl4965_hw_reg_set_txpower(priv, val);
8294
8295         return count;
8296 }
8297
8298 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8299
8300 static ssize_t show_flags(struct device *d,
8301                           struct device_attribute *attr, char *buf)
8302 {
8303         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8304
8305         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8306 }
8307
8308 static ssize_t store_flags(struct device *d,
8309                            struct device_attribute *attr,
8310                            const char *buf, size_t count)
8311 {
8312         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8313         u32 flags = simple_strtoul(buf, NULL, 0);
8314
8315         mutex_lock(&priv->mutex);
8316         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8317                 /* Cancel any currently running scans... */
8318                 if (iwl4965_scan_cancel_timeout(priv, 100))
8319                         IWL_WARNING("Could not cancel scan.\n");
8320                 else {
8321                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8322                                        flags);
8323                         priv->staging_rxon.flags = cpu_to_le32(flags);
8324                         iwl4965_commit_rxon(priv);
8325                 }
8326         }
8327         mutex_unlock(&priv->mutex);
8328
8329         return count;
8330 }
8331
8332 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8333
8334 static ssize_t show_filter_flags(struct device *d,
8335                                  struct device_attribute *attr, char *buf)
8336 {
8337         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8338
8339         return sprintf(buf, "0x%04X\n",
8340                 le32_to_cpu(priv->active_rxon.filter_flags));
8341 }
8342
8343 static ssize_t store_filter_flags(struct device *d,
8344                                   struct device_attribute *attr,
8345                                   const char *buf, size_t count)
8346 {
8347         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8348         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8349
8350         mutex_lock(&priv->mutex);
8351         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8352                 /* Cancel any currently running scans... */
8353                 if (iwl4965_scan_cancel_timeout(priv, 100))
8354                         IWL_WARNING("Could not cancel scan.\n");
8355                 else {
8356                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8357                                        "0x%04X\n", filter_flags);
8358                         priv->staging_rxon.filter_flags =
8359                                 cpu_to_le32(filter_flags);
8360                         iwl4965_commit_rxon(priv);
8361                 }
8362         }
8363         mutex_unlock(&priv->mutex);
8364
8365         return count;
8366 }
8367
8368 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8369                    store_filter_flags);
8370
8371 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8372
8373 static ssize_t show_measurement(struct device *d,
8374                                 struct device_attribute *attr, char *buf)
8375 {
8376         struct iwl4965_priv *priv = dev_get_drvdata(d);
8377         struct iwl4965_spectrum_notification measure_report;
8378         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8379         u8 *data = (u8 *) & measure_report;
8380         unsigned long flags;
8381
8382         spin_lock_irqsave(&priv->lock, flags);
8383         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8384                 spin_unlock_irqrestore(&priv->lock, flags);
8385                 return 0;
8386         }
8387         memcpy(&measure_report, &priv->measure_report, size);
8388         priv->measurement_status = 0;
8389         spin_unlock_irqrestore(&priv->lock, flags);
8390
8391         while (size && (PAGE_SIZE - len)) {
8392                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8393                                    PAGE_SIZE - len, 1);
8394                 len = strlen(buf);
8395                 if (PAGE_SIZE - len)
8396                         buf[len++] = '\n';
8397
8398                 ofs += 16;
8399                 size -= min(size, 16U);
8400         }
8401
8402         return len;
8403 }
8404
8405 static ssize_t store_measurement(struct device *d,
8406                                  struct device_attribute *attr,
8407                                  const char *buf, size_t count)
8408 {
8409         struct iwl4965_priv *priv = dev_get_drvdata(d);
8410         struct ieee80211_measurement_params params = {
8411                 .channel = le16_to_cpu(priv->active_rxon.channel),
8412                 .start_time = cpu_to_le64(priv->last_tsf),
8413                 .duration = cpu_to_le16(1),
8414         };
8415         u8 type = IWL_MEASURE_BASIC;
8416         u8 buffer[32];
8417         u8 channel;
8418
8419         if (count) {
8420                 char *p = buffer;
8421                 strncpy(buffer, buf, min(sizeof(buffer), count));
8422                 channel = simple_strtoul(p, NULL, 0);
8423                 if (channel)
8424                         params.channel = channel;
8425
8426                 p = buffer;
8427                 while (*p && *p != ' ')
8428                         p++;
8429                 if (*p)
8430                         type = simple_strtoul(p + 1, NULL, 0);
8431         }
8432
8433         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8434                        "channel %d (for '%s')\n", type, params.channel, buf);
8435         iwl4965_get_measurement(priv, &params, type);
8436
8437         return count;
8438 }
8439
8440 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8441                    show_measurement, store_measurement);
8442 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
8443
8444 static ssize_t store_retry_rate(struct device *d,
8445                                 struct device_attribute *attr,
8446                                 const char *buf, size_t count)
8447 {
8448         struct iwl4965_priv *priv = dev_get_drvdata(d);
8449
8450         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8451         if (priv->retry_rate <= 0)
8452                 priv->retry_rate = 1;
8453
8454         return count;
8455 }
8456
8457 static ssize_t show_retry_rate(struct device *d,
8458                                struct device_attribute *attr, char *buf)
8459 {
8460         struct iwl4965_priv *priv = dev_get_drvdata(d);
8461         return sprintf(buf, "%d", priv->retry_rate);
8462 }
8463
8464 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8465                    store_retry_rate);
8466
8467 static ssize_t store_power_level(struct device *d,
8468                                  struct device_attribute *attr,
8469                                  const char *buf, size_t count)
8470 {
8471         struct iwl4965_priv *priv = dev_get_drvdata(d);
8472         int rc;
8473         int mode;
8474
8475         mode = simple_strtoul(buf, NULL, 0);
8476         mutex_lock(&priv->mutex);
8477
8478         if (!iwl4965_is_ready(priv)) {
8479                 rc = -EAGAIN;
8480                 goto out;
8481         }
8482
8483         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8484                 mode = IWL_POWER_AC;
8485         else
8486                 mode |= IWL_POWER_ENABLED;
8487
8488         if (mode != priv->power_mode) {
8489                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8490                 if (rc) {
8491                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8492                         goto out;
8493                 }
8494                 priv->power_mode = mode;
8495         }
8496
8497         rc = count;
8498
8499  out:
8500         mutex_unlock(&priv->mutex);
8501         return rc;
8502 }
8503
8504 #define MAX_WX_STRING 80
8505
8506 /* Values are in microsecond */
8507 static const s32 timeout_duration[] = {
8508         350000,
8509         250000,
8510         75000,
8511         37000,
8512         25000,
8513 };
8514 static const s32 period_duration[] = {
8515         400000,
8516         700000,
8517         1000000,
8518         1000000,
8519         1000000
8520 };
8521
8522 static ssize_t show_power_level(struct device *d,
8523                                 struct device_attribute *attr, char *buf)
8524 {
8525         struct iwl4965_priv *priv = dev_get_drvdata(d);
8526         int level = IWL_POWER_LEVEL(priv->power_mode);
8527         char *p = buf;
8528
8529         p += sprintf(p, "%d ", level);
8530         switch (level) {
8531         case IWL_POWER_MODE_CAM:
8532         case IWL_POWER_AC:
8533                 p += sprintf(p, "(AC)");
8534                 break;
8535         case IWL_POWER_BATTERY:
8536                 p += sprintf(p, "(BATTERY)");
8537                 break;
8538         default:
8539                 p += sprintf(p,
8540                              "(Timeout %dms, Period %dms)",
8541                              timeout_duration[level - 1] / 1000,
8542                              period_duration[level - 1] / 1000);
8543         }
8544
8545         if (!(priv->power_mode & IWL_POWER_ENABLED))
8546                 p += sprintf(p, " OFF\n");
8547         else
8548                 p += sprintf(p, " \n");
8549
8550         return (p - buf + 1);
8551
8552 }
8553
8554 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8555                    store_power_level);
8556
8557 static ssize_t show_channels(struct device *d,
8558                              struct device_attribute *attr, char *buf)
8559 {
8560         /* all this shit doesn't belong into sysfs anyway */
8561         return 0;
8562 }
8563
8564 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8565
8566 static ssize_t show_statistics(struct device *d,
8567                                struct device_attribute *attr, char *buf)
8568 {
8569         struct iwl4965_priv *priv = dev_get_drvdata(d);
8570         u32 size = sizeof(struct iwl4965_notif_statistics);
8571         u32 len = 0, ofs = 0;
8572         u8 *data = (u8 *) & priv->statistics;
8573         int rc = 0;
8574
8575         if (!iwl4965_is_alive(priv))
8576                 return -EAGAIN;
8577
8578         mutex_lock(&priv->mutex);
8579         rc = iwl4965_send_statistics_request(priv);
8580         mutex_unlock(&priv->mutex);
8581
8582         if (rc) {
8583                 len = sprintf(buf,
8584                               "Error sending statistics request: 0x%08X\n", rc);
8585                 return len;
8586         }
8587
8588         while (size && (PAGE_SIZE - len)) {
8589                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8590                                    PAGE_SIZE - len, 1);
8591                 len = strlen(buf);
8592                 if (PAGE_SIZE - len)
8593                         buf[len++] = '\n';
8594
8595                 ofs += 16;
8596                 size -= min(size, 16U);
8597         }
8598
8599         return len;
8600 }
8601
8602 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8603
8604 static ssize_t show_antenna(struct device *d,
8605                             struct device_attribute *attr, char *buf)
8606 {
8607         struct iwl4965_priv *priv = dev_get_drvdata(d);
8608
8609         if (!iwl4965_is_alive(priv))
8610                 return -EAGAIN;
8611
8612         return sprintf(buf, "%d\n", priv->antenna);
8613 }
8614
8615 static ssize_t store_antenna(struct device *d,
8616                              struct device_attribute *attr,
8617                              const char *buf, size_t count)
8618 {
8619         int ant;
8620         struct iwl4965_priv *priv = dev_get_drvdata(d);
8621
8622         if (count == 0)
8623                 return 0;
8624
8625         if (sscanf(buf, "%1i", &ant) != 1) {
8626                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8627                 return count;
8628         }
8629
8630         if ((ant >= 0) && (ant <= 2)) {
8631                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8632                 priv->antenna = (enum iwl4965_antenna)ant;
8633         } else
8634                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8635
8636
8637         return count;
8638 }
8639
8640 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8641
8642 static ssize_t show_status(struct device *d,
8643                            struct device_attribute *attr, char *buf)
8644 {
8645         struct iwl4965_priv *priv = (struct iwl4965_priv *)d->driver_data;
8646         if (!iwl4965_is_alive(priv))
8647                 return -EAGAIN;
8648         return sprintf(buf, "0x%08x\n", (int)priv->status);
8649 }
8650
8651 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8652
8653 static ssize_t dump_error_log(struct device *d,
8654                               struct device_attribute *attr,
8655                               const char *buf, size_t count)
8656 {
8657         char *p = (char *)buf;
8658
8659         if (p[0] == '1')
8660                 iwl4965_dump_nic_error_log((struct iwl4965_priv *)d->driver_data);
8661
8662         return strnlen(buf, count);
8663 }
8664
8665 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8666
8667 static ssize_t dump_event_log(struct device *d,
8668                               struct device_attribute *attr,
8669                               const char *buf, size_t count)
8670 {
8671         char *p = (char *)buf;
8672
8673         if (p[0] == '1')
8674                 iwl4965_dump_nic_event_log((struct iwl4965_priv *)d->driver_data);
8675
8676         return strnlen(buf, count);
8677 }
8678
8679 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8680
8681 /*****************************************************************************
8682  *
8683  * driver setup and teardown
8684  *
8685  *****************************************************************************/
8686
8687 static void iwl4965_setup_deferred_work(struct iwl4965_priv *priv)
8688 {
8689         priv->workqueue = create_workqueue(DRV_NAME);
8690
8691         init_waitqueue_head(&priv->wait_command_queue);
8692
8693         INIT_WORK(&priv->up, iwl4965_bg_up);
8694         INIT_WORK(&priv->restart, iwl4965_bg_restart);
8695         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
8696         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
8697         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
8698         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
8699         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
8700         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
8701         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
8702         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
8703         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
8704         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
8705
8706         iwl4965_hw_setup_deferred_work(priv);
8707
8708         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8709                      iwl4965_irq_tasklet, (unsigned long)priv);
8710 }
8711
8712 static void iwl4965_cancel_deferred_work(struct iwl4965_priv *priv)
8713 {
8714         iwl4965_hw_cancel_deferred_work(priv);
8715
8716         cancel_delayed_work_sync(&priv->init_alive_start);
8717         cancel_delayed_work(&priv->scan_check);
8718         cancel_delayed_work(&priv->alive_start);
8719         cancel_delayed_work(&priv->post_associate);
8720         cancel_work_sync(&priv->beacon_update);
8721 }
8722
8723 static struct attribute *iwl4965_sysfs_entries[] = {
8724         &dev_attr_antenna.attr,
8725         &dev_attr_channels.attr,
8726         &dev_attr_dump_errors.attr,
8727         &dev_attr_dump_events.attr,
8728         &dev_attr_flags.attr,
8729         &dev_attr_filter_flags.attr,
8730 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
8731         &dev_attr_measurement.attr,
8732 #endif
8733         &dev_attr_power_level.attr,
8734         &dev_attr_retry_rate.attr,
8735         &dev_attr_rf_kill.attr,
8736         &dev_attr_rs_window.attr,
8737         &dev_attr_statistics.attr,
8738         &dev_attr_status.attr,
8739         &dev_attr_temperature.attr,
8740         &dev_attr_tx_power.attr,
8741
8742         NULL
8743 };
8744
8745 static struct attribute_group iwl4965_attribute_group = {
8746         .name = NULL,           /* put in device directory */
8747         .attrs = iwl4965_sysfs_entries,
8748 };
8749
8750 static struct ieee80211_ops iwl4965_hw_ops = {
8751         .tx = iwl4965_mac_tx,
8752         .start = iwl4965_mac_start,
8753         .stop = iwl4965_mac_stop,
8754         .add_interface = iwl4965_mac_add_interface,
8755         .remove_interface = iwl4965_mac_remove_interface,
8756         .config = iwl4965_mac_config,
8757         .config_interface = iwl4965_mac_config_interface,
8758         .configure_filter = iwl4965_configure_filter,
8759         .set_key = iwl4965_mac_set_key,
8760         .get_stats = iwl4965_mac_get_stats,
8761         .get_tx_stats = iwl4965_mac_get_tx_stats,
8762         .conf_tx = iwl4965_mac_conf_tx,
8763         .get_tsf = iwl4965_mac_get_tsf,
8764         .reset_tsf = iwl4965_mac_reset_tsf,
8765         .beacon_update = iwl4965_mac_beacon_update,
8766         .bss_info_changed = iwl4965_bss_info_changed,
8767 #ifdef CONFIG_IWL4965_HT
8768         .conf_ht = iwl4965_mac_conf_ht,
8769         .ampdu_action = iwl4965_mac_ampdu_action,
8770 #endif  /* CONFIG_IWL4965_HT */
8771         .hw_scan = iwl4965_mac_hw_scan
8772 };
8773
8774 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8775 {
8776         int err = 0;
8777         struct iwl4965_priv *priv;
8778         struct ieee80211_hw *hw;
8779         int i;
8780         DECLARE_MAC_BUF(mac);
8781
8782         /* Disabling hardware scan means that mac80211 will perform scans
8783          * "the hard way", rather than using device's scan. */
8784         if (iwl4965_param_disable_hw_scan) {
8785                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8786                 iwl4965_hw_ops.hw_scan = NULL;
8787         }
8788
8789         if ((iwl4965_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8790             (iwl4965_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8791                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8792                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8793                 err = -EINVAL;
8794                 goto out;
8795         }
8796
8797         /* mac80211 allocates memory for this device instance, including
8798          *   space for this driver's private structure */
8799         hw = ieee80211_alloc_hw(sizeof(struct iwl4965_priv), &iwl4965_hw_ops);
8800         if (hw == NULL) {
8801                 IWL_ERROR("Can not allocate network device\n");
8802                 err = -ENOMEM;
8803                 goto out;
8804         }
8805         SET_IEEE80211_DEV(hw, &pdev->dev);
8806
8807         hw->rate_control_algorithm = "iwl-4965-rs";
8808
8809         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8810         priv = hw->priv;
8811         priv->hw = hw;
8812
8813         priv->pci_dev = pdev;
8814         priv->antenna = (enum iwl4965_antenna)iwl4965_param_antenna;
8815 #ifdef CONFIG_IWL4965_DEBUG
8816         iwl4965_debug_level = iwl4965_param_debug;
8817         atomic_set(&priv->restrict_refcnt, 0);
8818 #endif
8819         priv->retry_rate = 1;
8820
8821         priv->ibss_beacon = NULL;
8822
8823         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8824          *   the range of signal quality values that we'll provide.
8825          * Negative values for level/noise indicate that we'll provide dBm.
8826          * For WE, at least, non-0 values here *enable* display of values
8827          *   in app (iwconfig). */
8828         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8829         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8830         hw->max_signal = 100;   /* link quality indication (%) */
8831
8832         /* Tell mac80211 our Tx characteristics */
8833         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8834
8835         /* Default value; 4 EDCA QOS priorities */
8836         hw->queues = 4;
8837 #ifdef CONFIG_IWL4965_HT
8838         /* Enhanced value; more queues, to support 11n aggregation */
8839         hw->queues = 16;
8840 #endif /* CONFIG_IWL4965_HT */
8841
8842         spin_lock_init(&priv->lock);
8843         spin_lock_init(&priv->power_data.lock);
8844         spin_lock_init(&priv->sta_lock);
8845         spin_lock_init(&priv->hcmd_lock);
8846         spin_lock_init(&priv->lq_mngr.lock);
8847
8848         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
8849                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
8850
8851         INIT_LIST_HEAD(&priv->free_frames);
8852
8853         mutex_init(&priv->mutex);
8854         if (pci_enable_device(pdev)) {
8855                 err = -ENODEV;
8856                 goto out_ieee80211_free_hw;
8857         }
8858
8859         pci_set_master(pdev);
8860
8861         /* Clear the driver's (not device's) station table */
8862         iwl4965_clear_stations_table(priv);
8863
8864         priv->data_retry_limit = -1;
8865         priv->ieee_channels = NULL;
8866         priv->ieee_rates = NULL;
8867         priv->band = IEEE80211_BAND_2GHZ;
8868
8869         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
8870         if (!err)
8871                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
8872         if (err) {
8873                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
8874                 goto out_pci_disable_device;
8875         }
8876
8877         pci_set_drvdata(pdev, priv);
8878         err = pci_request_regions(pdev, DRV_NAME);
8879         if (err)
8880                 goto out_pci_disable_device;
8881
8882         /* We disable the RETRY_TIMEOUT register (0x41) to keep
8883          * PCI Tx retries from interfering with C3 CPU state */
8884         pci_write_config_byte(pdev, 0x41, 0x00);
8885
8886         priv->hw_base = pci_iomap(pdev, 0, 0);
8887         if (!priv->hw_base) {
8888                 err = -ENODEV;
8889                 goto out_pci_release_regions;
8890         }
8891
8892         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
8893                         (unsigned long long) pci_resource_len(pdev, 0));
8894         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
8895
8896         /* Initialize module parameter values here */
8897
8898         /* Disable radio (SW RF KILL) via parameter when loading driver */
8899         if (iwl4965_param_disable) {
8900                 set_bit(STATUS_RF_KILL_SW, &priv->status);
8901                 IWL_DEBUG_INFO("Radio disabled.\n");
8902         }
8903
8904         priv->iw_mode = IEEE80211_IF_TYPE_STA;
8905
8906         priv->ps_mode = 0;
8907         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
8908         priv->valid_antenna = 0x7;      /* assume all 3 connected */
8909         priv->ps_mode = IWL_MIMO_PS_NONE;
8910
8911         /* Choose which receivers/antennas to use */
8912         iwl4965_set_rxon_chain(priv);
8913
8914         printk(KERN_INFO DRV_NAME
8915                ": Detected Intel Wireless WiFi Link 4965AGN\n");
8916
8917         /* Device-specific setup */
8918         if (iwl4965_hw_set_hw_setting(priv)) {
8919                 IWL_ERROR("failed to set hw settings\n");
8920                 goto out_iounmap;
8921         }
8922
8923         if (iwl4965_param_qos_enable)
8924                 priv->qos_data.qos_enable = 1;
8925
8926         iwl4965_reset_qos(priv);
8927
8928         priv->qos_data.qos_active = 0;
8929         priv->qos_data.qos_cap.val = 0;
8930
8931         iwl4965_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
8932         iwl4965_setup_deferred_work(priv);
8933         iwl4965_setup_rx_handlers(priv);
8934
8935         priv->rates_mask = IWL_RATES_MASK;
8936         /* If power management is turned on, default to AC mode */
8937         priv->power_mode = IWL_POWER_AC;
8938         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
8939
8940         iwl4965_disable_interrupts(priv);
8941
8942         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8943         if (err) {
8944                 IWL_ERROR("failed to create sysfs device attributes\n");
8945                 goto out_release_irq;
8946         }
8947
8948         /* nic init */
8949         iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
8950                     CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
8951
8952         iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
8953         err = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
8954                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
8955                           CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
8956         if (err < 0) {
8957                 IWL_DEBUG_INFO("Failed to init the card\n");
8958                 goto out_remove_sysfs;
8959         }
8960         /* Read the EEPROM */
8961         err = iwl4965_eeprom_init(priv);
8962         if (err) {
8963                 IWL_ERROR("Unable to init EEPROM\n");
8964                 goto out_remove_sysfs;
8965         }
8966         /* MAC Address location in EEPROM same for 3945/4965 */
8967         get_eeprom_mac(priv, priv->mac_addr);
8968         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
8969         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
8970
8971         err = iwl4965_init_channel_map(priv);
8972         if (err) {
8973                 IWL_ERROR("initializing regulatory failed: %d\n", err);
8974                 goto out_remove_sysfs;
8975         }
8976
8977         err = iwl4965_init_geos(priv);
8978         if (err) {
8979                 IWL_ERROR("initializing geos failed: %d\n", err);
8980                 goto out_free_channel_map;
8981         }
8982
8983         iwl4965_rate_control_register(priv->hw);
8984         err = ieee80211_register_hw(priv->hw);
8985         if (err) {
8986                 IWL_ERROR("Failed to register network device (error %d)\n", err);
8987                 goto out_free_geos;
8988         }
8989
8990         priv->hw->conf.beacon_int = 100;
8991         priv->mac80211_registered = 1;
8992         pci_save_state(pdev);
8993         pci_disable_device(pdev);
8994
8995         return 0;
8996
8997  out_free_geos:
8998         iwl4965_free_geos(priv);
8999  out_free_channel_map:
9000         iwl4965_free_channel_map(priv);
9001  out_remove_sysfs:
9002         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9003
9004  out_release_irq:
9005         destroy_workqueue(priv->workqueue);
9006         priv->workqueue = NULL;
9007         iwl4965_unset_hw_setting(priv);
9008
9009  out_iounmap:
9010         pci_iounmap(pdev, priv->hw_base);
9011  out_pci_release_regions:
9012         pci_release_regions(pdev);
9013  out_pci_disable_device:
9014         pci_disable_device(pdev);
9015         pci_set_drvdata(pdev, NULL);
9016  out_ieee80211_free_hw:
9017         ieee80211_free_hw(priv->hw);
9018  out:
9019         return err;
9020 }
9021
9022 static void iwl4965_pci_remove(struct pci_dev *pdev)
9023 {
9024         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9025         struct list_head *p, *q;
9026         int i;
9027
9028         if (!priv)
9029                 return;
9030
9031         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9032
9033         set_bit(STATUS_EXIT_PENDING, &priv->status);
9034
9035         iwl4965_down(priv);
9036
9037         /* Free MAC hash list for ADHOC */
9038         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9039                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9040                         list_del(p);
9041                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
9042                 }
9043         }
9044
9045         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
9046
9047         iwl4965_dealloc_ucode_pci(priv);
9048
9049         if (priv->rxq.bd)
9050                 iwl4965_rx_queue_free(priv, &priv->rxq);
9051         iwl4965_hw_txq_ctx_free(priv);
9052
9053         iwl4965_unset_hw_setting(priv);
9054         iwl4965_clear_stations_table(priv);
9055
9056         if (priv->mac80211_registered) {
9057                 ieee80211_unregister_hw(priv->hw);
9058                 iwl4965_rate_control_unregister(priv->hw);
9059         }
9060
9061         /*netif_stop_queue(dev); */
9062         flush_workqueue(priv->workqueue);
9063
9064         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
9065          * priv->workqueue... so we can't take down the workqueue
9066          * until now... */
9067         destroy_workqueue(priv->workqueue);
9068         priv->workqueue = NULL;
9069
9070         pci_iounmap(pdev, priv->hw_base);
9071         pci_release_regions(pdev);
9072         pci_disable_device(pdev);
9073         pci_set_drvdata(pdev, NULL);
9074
9075         iwl4965_free_channel_map(priv);
9076         iwl4965_free_geos(priv);
9077
9078         if (priv->ibss_beacon)
9079                 dev_kfree_skb(priv->ibss_beacon);
9080
9081         ieee80211_free_hw(priv->hw);
9082 }
9083
9084 #ifdef CONFIG_PM
9085
9086 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9087 {
9088         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9089
9090         if (priv->is_open) {
9091                 set_bit(STATUS_IN_SUSPEND, &priv->status);
9092                 iwl4965_mac_stop(priv->hw);
9093                 priv->is_open = 1;
9094         }
9095
9096         pci_set_power_state(pdev, PCI_D3hot);
9097
9098         return 0;
9099 }
9100
9101 static int iwl4965_pci_resume(struct pci_dev *pdev)
9102 {
9103         struct iwl4965_priv *priv = pci_get_drvdata(pdev);
9104
9105         pci_set_power_state(pdev, PCI_D0);
9106
9107         if (priv->is_open)
9108                 iwl4965_mac_start(priv->hw);
9109
9110         clear_bit(STATUS_IN_SUSPEND, &priv->status);
9111         return 0;
9112 }
9113
9114 #endif /* CONFIG_PM */
9115
9116 /*****************************************************************************
9117  *
9118  * driver and module entry point
9119  *
9120  *****************************************************************************/
9121
9122 static struct pci_driver iwl4965_driver = {
9123         .name = DRV_NAME,
9124         .id_table = iwl4965_hw_card_ids,
9125         .probe = iwl4965_pci_probe,
9126         .remove = __devexit_p(iwl4965_pci_remove),
9127 #ifdef CONFIG_PM
9128         .suspend = iwl4965_pci_suspend,
9129         .resume = iwl4965_pci_resume,
9130 #endif
9131 };
9132
9133 static int __init iwl4965_init(void)
9134 {
9135
9136         int ret;
9137         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9138         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9139         ret = pci_register_driver(&iwl4965_driver);
9140         if (ret) {
9141                 IWL_ERROR("Unable to initialize PCI module\n");
9142                 return ret;
9143         }
9144 #ifdef CONFIG_IWL4965_DEBUG
9145         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
9146         if (ret) {
9147                 IWL_ERROR("Unable to create driver sysfs file\n");
9148                 pci_unregister_driver(&iwl4965_driver);
9149                 return ret;
9150         }
9151 #endif
9152
9153         return ret;
9154 }
9155
9156 static void __exit iwl4965_exit(void)
9157 {
9158 #ifdef CONFIG_IWL4965_DEBUG
9159         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
9160 #endif
9161         pci_unregister_driver(&iwl4965_driver);
9162 }
9163
9164 module_param_named(antenna, iwl4965_param_antenna, int, 0444);
9165 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9166 module_param_named(disable, iwl4965_param_disable, int, 0444);
9167 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9168 module_param_named(hwcrypto, iwl4965_param_hwcrypto, int, 0444);
9169 MODULE_PARM_DESC(hwcrypto,
9170                  "using hardware crypto engine (default 0 [software])\n");
9171 module_param_named(debug, iwl4965_param_debug, int, 0444);
9172 MODULE_PARM_DESC(debug, "debug output mask");
9173 module_param_named(disable_hw_scan, iwl4965_param_disable_hw_scan, int, 0444);
9174 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9175
9176 module_param_named(queues_num, iwl4965_param_queues_num, int, 0444);
9177 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9178
9179 /* QoS */
9180 module_param_named(qos_enable, iwl4965_param_qos_enable, int, 0444);
9181 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9182 module_param_named(amsdu_size_8K, iwl4965_param_amsdu_size_8K, int, 0444);
9183 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
9184
9185 module_exit(iwl4965_exit);
9186 module_init(iwl4965_init);