drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 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  *  Intel Linux Wireless <ilw@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/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-3945.h"
  55 #include "iwl-helpers.h"
  56 #include "iwl-core.h"
  57 #include "iwl-dev.h"
  58
  59 /*
  60  * module name, copyright, version, etc.
  61  */
  62
  63 #define DRV_DESCRIPTION \
  64 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  65
  66 #ifdef CONFIG_IWL3945_DEBUG
  67 #define VD "d"
  68 #else
  69 #define VD
  70 #endif
  71
  72 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  73 #define VS "s"
  74 #else
  75 #define VS
  76 #endif
  77
  78 #define IWL39_VERSION "1.2.26k" VD VS
  79 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  80 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  81 #define DRV_VERSION     IWL39_VERSION
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88
  89  /* module parameters */
  90 struct iwl_mod_params iwl3945_mod_params = {
  91         .num_of_queues = IWL39_MAX_NUM_QUEUES,
  92         .sw_crypto = 1,
  93         /* the rest are 0 by default */
  94 };
  95
  96 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
  97  * DMA services
  98  *
  99  * Theory of operation
 100  *
 101  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 102  * of buffer descriptors, each of which points to one or more data buffers for
 103  * the device to read from or fill.  Driver and device exchange status of each
 104  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 105  * entries in each circular buffer, to protect against confusing empty and full
 106  * queue states.
 107  *
 108  * The device reads or writes the data in the queues via the device's several
 109  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 110  *
 111  * For Tx queue, there are low mark and high mark limits. If, after queuing
 112  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 113  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 114  * Tx queue resumed.
 115  *
 116  * The 3945 operates with six queues:  One receive queue, one transmit queue
 117  * (#4) for sending commands to the device firmware, and four transmit queues
 118  * (#0-3) for data tx via EDCA.  An additional 2 HCCA queues are unused.
 119  ***************************************************/
 120
 121 /**
 122  * iwl3945_queue_init - Initialize queue's high/low-water and read/write indexes
 123  */
 124 static int iwl3945_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
 125                           int count, int slots_num, u32 id)
 126 {
 127         q->n_bd = count;
 128         q->n_window = slots_num;
 129         q->id = id;
 130
 131         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 132          * and iwl_queue_dec_wrap are broken. */
 133         BUG_ON(!is_power_of_2(count));
 134
 135         /* slots_num must be power-of-two size, otherwise
 136          * get_cmd_index is broken. */
 137         BUG_ON(!is_power_of_2(slots_num));
 138
 139         q->low_mark = q->n_window / 4;
 140         if (q->low_mark < 4)
 141                 q->low_mark = 4;
 142
 143         q->high_mark = q->n_window / 8;
 144         if (q->high_mark < 2)
 145                 q->high_mark = 2;
 146
 147         q->write_ptr = q->read_ptr = 0;
 148
 149         return 0;
 150 }
 151
 152 /**
 153  * iwl3945_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 154  */
 155 static int iwl3945_tx_queue_alloc(struct iwl_priv *priv,
 156                               struct iwl_tx_queue *txq, u32 id)
 157 {
 158         struct pci_dev *dev = priv->pci_dev;
 159
 160         /* Driver private data, only for Tx (not command) queues,
 161          * not shared with device. */
 162         if (id != IWL_CMD_QUEUE_NUM) {
 163                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 164                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 165                 if (!txq->txb) {
 166                         IWL_ERR(priv, "kmalloc for auxiliary BD "
 167                                   "structures failed\n");
 168                         goto error;
 169                 }
 170         } else
 171                 txq->txb = NULL;
 172
 173         /* Circular buffer of transmit frame descriptors (TFDs),
 174          * shared with device */
 175         txq->tfds39 = pci_alloc_consistent(dev,
 176                         sizeof(txq->tfds39[0]) * TFD_QUEUE_SIZE_MAX,
 177                         &txq->q.dma_addr);
 178
 179         if (!txq->tfds39) {
 180                 IWL_ERR(priv, "pci_alloc_consistent(%zd) failed\n",
 181                           sizeof(txq->tfds39[0]) * TFD_QUEUE_SIZE_MAX);
 182                 goto error;
 183         }
 184         txq->q.id = id;
 185
 186         return 0;
 187
 188  error:
 189         kfree(txq->txb);
 190         txq->txb = NULL;
 191
 192         return -ENOMEM;
 193 }
 194
 195 /**
 196  * iwl3945_tx_queue_init - Allocate and initialize one tx/cmd queue
 197  */
 198 int iwl3945_tx_queue_init(struct iwl_priv *priv,
 199                       struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
 200 {
 201         int len, i;
 202         int rc = 0;
 203
 204         /*
 205          * Alloc buffer array for commands (Tx or other types of commands).
 206          * For the command queue (#4), allocate command space + one big
 207          * command for scan, since scan command is very huge; the system will
 208          * not have two scans at the same time, so only one is needed.
 209          * For data Tx queues (all other queues), no super-size command
 210          * space is needed.
 211          */
 212         len = sizeof(struct iwl_cmd);
 213         for (i = 0; i <= slots_num; i++) {
 214                 if (i == slots_num) {
 215                         if (txq_id == IWL_CMD_QUEUE_NUM)
 216                                 len += IWL_MAX_SCAN_SIZE;
 217                         else
 218                                 continue;
 219                 }
 220
 221                 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
 222                 if (!txq->cmd[i])
 223                         goto err;
 224         }
 225
 226         /* Alloc driver data array and TFD circular buffer */
 227         rc = iwl3945_tx_queue_alloc(priv, txq, txq_id);
 228         if (rc)
 229                 goto err;
 230
 231         txq->need_update = 0;
 232
 233         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 234          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 235         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 236
 237         /* Initialize queue high/low-water, head/tail indexes */
 238         iwl3945_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 239
 240         /* Tell device where to find queue, enable DMA channel. */
 241         iwl3945_hw_tx_queue_init(priv, txq);
 242
 243         return 0;
 244 err:
 245         for (i = 0; i < slots_num; i++) {
 246                 kfree(txq->cmd[i]);
 247                 txq->cmd[i] = NULL;
 248         }
 249
 250         if (txq_id == IWL_CMD_QUEUE_NUM) {
 251                 kfree(txq->cmd[slots_num]);
 252                 txq->cmd[slots_num] = NULL;
 253         }
 254         return -ENOMEM;
 255 }
 256
 257 /**
 258  * iwl3945_tx_queue_free - Deallocate DMA queue.
 259  * @txq: Transmit queue to deallocate.
 260  *
 261  * Empty queue by removing and destroying all BD's.
 262  * Free all buffers.
 263  * 0-fill, but do not free "txq" descriptor structure.
 264  */
 265 void iwl3945_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 266 {
 267         struct iwl_queue *q = &txq->q;
 268         struct pci_dev *dev = priv->pci_dev;
 269         int len, i;
 270
 271         if (q->n_bd == 0)
 272                 return;
 273
 274         /* first, empty all BD's */
 275         for (; q->write_ptr != q->read_ptr;
 276              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 277                 priv->cfg->ops->lib->txq_free_tfd(priv, txq);
 278
 279         len = sizeof(struct iwl_cmd) * q->n_window;
 280         if (q->id == IWL_CMD_QUEUE_NUM)
 281                 len += IWL_MAX_SCAN_SIZE;
 282
 283         /* De-alloc array of command/tx buffers */
 284         for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
 285                 kfree(txq->cmd[i]);
 286
 287         /* De-alloc circular buffer of TFDs */
 288         if (txq->q.n_bd)
 289                 pci_free_consistent(dev, sizeof(struct iwl3945_tfd) *
 290                                     txq->q.n_bd, txq->tfds39, txq->q.dma_addr);
 291
 292         /* De-alloc array of per-TFD driver data */
 293         kfree(txq->txb);
 294         txq->txb = NULL;
 295
 296         /* 0-fill queue descriptor structure */
 297         memset(txq, 0, sizeof(*txq));
 298 }
 299
 300 /*************** STATION TABLE MANAGEMENT ****
 301  * mac80211 should be examined to determine if sta_info is duplicating
 302  * the functionality provided here
 303  */
 304
 305 /**************************************************************/
 306 #if 0 /* temporary disable till we add real remove station */
 307 /**
 308  * iwl3945_remove_station - Remove driver's knowledge of station.
 309  *
 310  * NOTE:  This does not remove station from device's station table.
 311  */
 312 static u8 iwl3945_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 313 {
 314         int index = IWL_INVALID_STATION;
 315         int i;
 316         unsigned long flags;
 317
 318         spin_lock_irqsave(&priv->sta_lock, flags);
 319
 320         if (is_ap)
 321                 index = IWL_AP_ID;
 322         else if (is_broadcast_ether_addr(addr))
 323                 index = priv->hw_params.bcast_sta_id;
 324         else
 325                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 326                         if (priv->stations_39[i].used &&
 327                             !compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 328                                                 addr)) {
 329                                 index = i;
 330                                 break;
 331                         }
 332
 333         if (unlikely(index == IWL_INVALID_STATION))
 334                 goto out;
 335
 336         if (priv->stations_39[index].used) {
 337                 priv->stations_39[index].used = 0;
 338                 priv->num_stations--;
 339         }
 340
 341         BUG_ON(priv->num_stations < 0);
 342
 343 out:
 344         spin_unlock_irqrestore(&priv->sta_lock, flags);
 345         return 0;
 346 }
 347 #endif
 348
 349 /**
 350  * iwl3945_clear_stations_table - Clear the driver's station table
 351  *
 352  * NOTE:  This does not clear or otherwise alter the device's station table.
 353  */
 354 static void iwl3945_clear_stations_table(struct iwl_priv *priv)
 355 {
 356         unsigned long flags;
 357
 358         spin_lock_irqsave(&priv->sta_lock, flags);
 359
 360         priv->num_stations = 0;
 361         memset(priv->stations_39, 0, sizeof(priv->stations_39));
 362
 363         spin_unlock_irqrestore(&priv->sta_lock, flags);
 364 }
 365
 366 /**
 367  * iwl3945_add_station - Add station to station tables in driver and device
 368  */
 369 u8 iwl3945_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
 370 {
 371         int i;
 372         int index = IWL_INVALID_STATION;
 373         struct iwl3945_station_entry *station;
 374         unsigned long flags_spin;
 375         u8 rate;
 376
 377         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 378         if (is_ap)
 379                 index = IWL_AP_ID;
 380         else if (is_broadcast_ether_addr(addr))
 381                 index = priv->hw_params.bcast_sta_id;
 382         else
 383                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 384                         if (!compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 385                                                 addr)) {
 386                                 index = i;
 387                                 break;
 388                         }
 389
 390                         if (!priv->stations_39[i].used &&
 391                             index == IWL_INVALID_STATION)
 392                                 index = i;
 393                 }
 394
 395         /* These two conditions has the same outcome but keep them separate
 396           since they have different meaning */
 397         if (unlikely(index == IWL_INVALID_STATION)) {
 398                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 399                 return index;
 400         }
 401
 402         if (priv->stations_39[index].used &&
 403            !compare_ether_addr(priv->stations_39[index].sta.sta.addr, addr)) {
 404                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 405                 return index;
 406         }
 407
 408         IWL_DEBUG_ASSOC("Add STA ID %d: %pM\n", index, addr);
 409         station = &priv->stations_39[index];
 410         station->used = 1;
 411         priv->num_stations++;
 412
 413         /* Set up the REPLY_ADD_STA command to send to device */
 414         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 415         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 416         station->sta.mode = 0;
 417         station->sta.sta.sta_id = index;
 418         station->sta.station_flags = 0;
 419
 420         if (priv->band == IEEE80211_BAND_5GHZ)
 421                 rate = IWL_RATE_6M_PLCP;
 422         else
 423                 rate =  IWL_RATE_1M_PLCP;
 424
 425         /* Turn on both antennas for the station... */
 426         station->sta.rate_n_flags =
 427                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 428
 429         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 430
 431         /* Add station to device's station table */
 432         iwl3945_send_add_station(priv, &station->sta, flags);
 433         return index;
 434
 435 }
 436
 437 int iwl3945_send_statistics_request(struct iwl_priv *priv)
 438 {
 439         u32 val = 0;
 440
 441         struct iwl_host_cmd cmd = {
 442                 .id = REPLY_STATISTICS_CMD,
 443                 .len = sizeof(val),
 444                 .data = &val,
 445         };
 446
 447         return iwl_send_cmd_sync(priv, &cmd);
 448 }
 449
 450 /**
 451  * iwl3945_set_rxon_channel - Set the phymode and channel values in staging RXON
 452  * @band: 2.4 or 5 GHz band
 453  * @channel: Any channel valid for the requested band
 454
 455  * In addition to setting the staging RXON, priv->band is also set.
 456  *
 457  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 458  * in the staging RXON flag structure based on the band
 459  */
 460 static int iwl3945_set_rxon_channel(struct iwl_priv *priv,
 461                                     enum ieee80211_band band,
 462                                     u16 channel)
 463 {
 464         if (!iwl3945_get_channel_info(priv, band, channel)) {
 465                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 466                                channel, band);
 467                 return -EINVAL;
 468         }
 469
 470         if ((le16_to_cpu(priv->staging39_rxon.channel) == channel) &&
 471             (priv->band == band))
 472                 return 0;
 473
 474         priv->staging39_rxon.channel = cpu_to_le16(channel);
 475         if (band == IEEE80211_BAND_5GHZ)
 476                 priv->staging39_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 477         else
 478                 priv->staging39_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 479
 480         priv->band = band;
 481
 482         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 483
 484         return 0;
 485 }
 486
 487 /**
 488  * iwl3945_check_rxon_cmd - validate RXON structure is valid
 489  *
 490  * NOTE:  This is really only useful during development and can eventually
 491  * be #ifdef'd out once the driver is stable and folks aren't actively
 492  * making changes
 493  */
 494 static int iwl3945_check_rxon_cmd(struct iwl_priv *priv)
 495 {
 496         int error = 0;
 497         int counter = 1;
 498         struct iwl3945_rxon_cmd *rxon = &priv->staging39_rxon;
 499
 500         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 501                 error |= le32_to_cpu(rxon->flags &
 502                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 503                                  RXON_FLG_RADAR_DETECT_MSK));
 504                 if (error)
 505                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 506                                     counter++, error);
 507         } else {
 508                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 509                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 510                 if (error)
 511                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 512                                     counter++, error);
 513                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 514                 if (error)
 515                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 516                                     counter++, error);
 517         }
 518         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 519         if (error)
 520                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 521
 522         /* make sure basic rates 6Mbps and 1Mbps are supported */
 523         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 524                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 525         if (error)
 526                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 527
 528         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 529         if (error)
 530                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 531
 532         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 533                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 534         if (error)
 535                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 536                             counter++, error);
 537
 538         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 539                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 540         if (error)
 541                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 542                             counter++, error);
 543
 544         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 545                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 546         if (error)
 547                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 548                             counter++, error);
 549
 550         if ((rxon->flags & RXON_FLG_DIS_DIV_MSK))
 551                 error |= ((rxon->flags & (RXON_FLG_ANT_B_MSK |
 552                                 RXON_FLG_ANT_A_MSK)) == 0);
 553         if (error)
 554                 IWL_WARN(priv, "check antenna %d %d\n", counter++, error);
 555
 556         if (error)
 557                 IWL_WARN(priv, "Tuning to channel %d\n",
 558                             le16_to_cpu(rxon->channel));
 559
 560         if (error) {
 561                 IWL_ERR(priv, "Not a valid rxon_assoc_cmd field values\n");
 562                 return -1;
 563         }
 564         return 0;
 565 }
 566
 567 /**
 568  * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 569  * @priv: staging_rxon is compared to active_rxon
 570  *
 571  * If the RXON structure is changing enough to require a new tune,
 572  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 573  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 574  */
 575 static int iwl3945_full_rxon_required(struct iwl_priv *priv)
 576 {
 577
 578         /* These items are only settable from the full RXON command */
 579         if (!(iwl3945_is_associated(priv)) ||
 580             compare_ether_addr(priv->staging39_rxon.bssid_addr,
 581                                priv->active39_rxon.bssid_addr) ||
 582             compare_ether_addr(priv->staging39_rxon.node_addr,
 583                                priv->active39_rxon.node_addr) ||
 584             compare_ether_addr(priv->staging39_rxon.wlap_bssid_addr,
 585                                priv->active39_rxon.wlap_bssid_addr) ||
 586             (priv->staging39_rxon.dev_type != priv->active39_rxon.dev_type) ||
 587             (priv->staging39_rxon.channel != priv->active39_rxon.channel) ||
 588             (priv->staging39_rxon.air_propagation !=
 589              priv->active39_rxon.air_propagation) ||
 590             (priv->staging39_rxon.assoc_id != priv->active39_rxon.assoc_id))
 591                 return 1;
 592
 593         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 594          * be updated with the RXON_ASSOC command -- however only some
 595          * flag transitions are allowed using RXON_ASSOC */
 596
 597         /* Check if we are not switching bands */
 598         if ((priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 599             (priv->active39_rxon.flags & RXON_FLG_BAND_24G_MSK))
 600                 return 1;
 601
 602         /* Check if we are switching association toggle */
 603         if ((priv->staging39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 604                 (priv->active39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 605                 return 1;
 606
 607         return 0;
 608 }
 609
 610 static int iwl3945_send_rxon_assoc(struct iwl_priv *priv)
 611 {
 612         int rc = 0;
 613         struct iwl_rx_packet *res = NULL;
 614         struct iwl3945_rxon_assoc_cmd rxon_assoc;
 615         struct iwl_host_cmd cmd = {
 616                 .id = REPLY_RXON_ASSOC,
 617                 .len = sizeof(rxon_assoc),
 618                 .meta.flags = CMD_WANT_SKB,
 619                 .data = &rxon_assoc,
 620         };
 621         const struct iwl3945_rxon_cmd *rxon1 = &priv->staging39_rxon;
 622         const struct iwl3945_rxon_cmd *rxon2 = &priv->active39_rxon;
 623
 624         if ((rxon1->flags == rxon2->flags) &&
 625             (rxon1->filter_flags == rxon2->filter_flags) &&
 626             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 627             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 628                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
 629                 return 0;
 630         }
 631
 632         rxon_assoc.flags = priv->staging39_rxon.flags;
 633         rxon_assoc.filter_flags = priv->staging39_rxon.filter_flags;
 634         rxon_assoc.ofdm_basic_rates = priv->staging39_rxon.ofdm_basic_rates;
 635         rxon_assoc.cck_basic_rates = priv->staging39_rxon.cck_basic_rates;
 636         rxon_assoc.reserved = 0;
 637
 638         rc = iwl_send_cmd_sync(priv, &cmd);
 639         if (rc)
 640                 return rc;
 641
 642         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 643         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 644                 IWL_ERR(priv, "Bad return from REPLY_RXON_ASSOC command\n");
 645                 rc = -EIO;
 646         }
 647
 648         priv->alloc_rxb_skb--;
 649         dev_kfree_skb_any(cmd.meta.u.skb);
 650
 651         return rc;
 652 }
 653
 654 /**
 655  * iwl3945_commit_rxon - commit staging_rxon to hardware
 656  *
 657  * The RXON command in staging_rxon is committed to the hardware and
 658  * the active_rxon structure is updated with the new data.  This
 659  * function correctly transitions out of the RXON_ASSOC_MSK state if
 660  * a HW tune is required based on the RXON structure changes.
 661  */
 662 static int iwl3945_commit_rxon(struct iwl_priv *priv)
 663 {
 664         /* cast away the const for active_rxon in this function */
 665         struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active39_rxon;
 666         int rc = 0;
 667
 668         if (!iwl_is_alive(priv))
 669                 return -1;
 670
 671         /* always get timestamp with Rx frame */
 672         priv->staging39_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 673
 674         /* select antenna */
 675         priv->staging39_rxon.flags &=
 676             ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
 677         priv->staging39_rxon.flags |= iwl3945_get_antenna_flags(priv);
 678
 679         rc = iwl3945_check_rxon_cmd(priv);
 680         if (rc) {
 681                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 682                 return -EINVAL;
 683         }
 684
 685         /* If we don't need to send a full RXON, we can use
 686          * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
 687          * and other flags for the current radio configuration. */
 688         if (!iwl3945_full_rxon_required(priv)) {
 689                 rc = iwl3945_send_rxon_assoc(priv);
 690                 if (rc) {
 691                         IWL_ERR(priv, "Error setting RXON_ASSOC "
 692                                   "configuration (%d).\n", rc);
 693                         return rc;
 694                 }
 695
 696                 memcpy(active_rxon, &priv->staging39_rxon, sizeof(*active_rxon));
 697
 698                 return 0;
 699         }
 700
 701         /* If we are currently associated and the new config requires
 702          * an RXON_ASSOC and the new config wants the associated mask enabled,
 703          * we must clear the associated from the active configuration
 704          * before we apply the new config */
 705         if (iwl3945_is_associated(priv) &&
 706             (priv->staging39_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 707                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 708                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 709
 710                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 711                                       sizeof(struct iwl3945_rxon_cmd),
 712                                       &priv->active39_rxon);
 713
 714                 /* If the mask clearing failed then we set
 715                  * active_rxon back to what it was previously */
 716                 if (rc) {
 717                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 718                         IWL_ERR(priv, "Error clearing ASSOC_MSK on current "
 719                                   "configuration (%d).\n", rc);
 720                         return rc;
 721                 }
 722         }
 723
 724         IWL_DEBUG_INFO("Sending RXON\n"
 725                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 726                        "* channel = %d\n"
 727                        "* bssid = %pM\n",
 728                        ((priv->staging39_rxon.filter_flags &
 729                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 730                        le16_to_cpu(priv->staging39_rxon.channel),
 731                        priv->staging_rxon.bssid_addr);
 732
 733         /* Apply the new configuration */
 734         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 735                               sizeof(struct iwl3945_rxon_cmd), &priv->staging39_rxon);
 736         if (rc) {
 737                 IWL_ERR(priv, "Error setting new configuration (%d).\n", rc);
 738                 return rc;
 739         }
 740
 741         memcpy(active_rxon, &priv->staging39_rxon, sizeof(*active_rxon));
 742
 743         iwl3945_clear_stations_table(priv);
 744
 745         /* If we issue a new RXON command which required a tune then we must
 746          * send a new TXPOWER command or we won't be able to Tx any frames */
 747         rc = priv->cfg->ops->lib->send_tx_power(priv);
 748         if (rc) {
 749                 IWL_ERR(priv, "Error setting Tx power (%d).\n", rc);
 750                 return rc;
 751         }
 752
 753         /* Add the broadcast address so we can send broadcast frames */
 754         if (iwl3945_add_station(priv, iwl_bcast_addr, 0, 0) ==
 755             IWL_INVALID_STATION) {
 756                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 757                 return -EIO;
 758         }
 759
 760         /* If we have set the ASSOC_MSK and we are in BSS mode then
 761          * add the IWL_AP_ID to the station rate table */
 762         if (iwl3945_is_associated(priv) &&
 763             (priv->iw_mode == NL80211_IFTYPE_STATION))
 764                 if (iwl3945_add_station(priv, priv->active39_rxon.bssid_addr, 1, 0)
 765                     == IWL_INVALID_STATION) {
 766                         IWL_ERR(priv, "Error adding AP address for transmit\n");
 767                         return -EIO;
 768                 }
 769
 770         /* Init the hardware's rate fallback order based on the band */
 771         rc = iwl3945_init_hw_rate_table(priv);
 772         if (rc) {
 773                 IWL_ERR(priv, "Error setting HW rate table: %02X\n", rc);
 774                 return -EIO;
 775         }
 776
 777         return 0;
 778 }
 779
 780 static int iwl3945_send_bt_config(struct iwl_priv *priv)
 781 {
 782         struct iwl_bt_cmd bt_cmd = {
 783                 .flags = 3,
 784                 .lead_time = 0xAA,
 785                 .max_kill = 1,
 786                 .kill_ack_mask = 0,
 787                 .kill_cts_mask = 0,
 788         };
 789
 790         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 791                                         sizeof(bt_cmd), &bt_cmd);
 792 }
 793
 794 static int iwl3945_send_scan_abort(struct iwl_priv *priv)
 795 {
 796         int rc = 0;
 797         struct iwl_rx_packet *res;
 798         struct iwl_host_cmd cmd = {
 799                 .id = REPLY_SCAN_ABORT_CMD,
 800                 .meta.flags = CMD_WANT_SKB,
 801         };
 802
 803         /* If there isn't a scan actively going on in the hardware
 804          * then we are in between scan bands and not actually
 805          * actively scanning, so don't send the abort command */
 806         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 807                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 808                 return 0;
 809         }
 810
 811         rc = iwl_send_cmd_sync(priv, &cmd);
 812         if (rc) {
 813                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 814                 return rc;
 815         }
 816
 817         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 818         if (res->u.status != CAN_ABORT_STATUS) {
 819                 /* The scan abort will return 1 for success or
 820                  * 2 for "failure".  A failure condition can be
 821                  * due to simply not being in an active scan which
 822                  * can occur if we send the scan abort before we
 823                  * the microcode has notified us that a scan is
 824                  * completed. */
 825                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 826                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 827                 clear_bit(STATUS_SCAN_HW, &priv->status);
 828         }
 829
 830         dev_kfree_skb_any(cmd.meta.u.skb);
 831
 832         return rc;
 833 }
 834
 835 static int iwl3945_add_sta_sync_callback(struct iwl_priv *priv,
 836                                      struct iwl_cmd *cmd, struct sk_buff *skb)
 837 {
 838         struct iwl_rx_packet *res = NULL;
 839
 840         if (!skb) {
 841                 IWL_ERR(priv, "Error: Response NULL in REPLY_ADD_STA.\n");
 842                 return 1;
 843         }
 844
 845         res = (struct iwl_rx_packet *)skb->data;
 846         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 847                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 848                           res->hdr.flags);
 849                 return 1;
 850         }
 851
 852         switch (res->u.add_sta.status) {
 853         case ADD_STA_SUCCESS_MSK:
 854                 break;
 855         default:
 856                 break;
 857         }
 858
 859         /* We didn't cache the SKB; let the caller free it */
 860         return 1;
 861 }
 862
 863 int iwl3945_send_add_station(struct iwl_priv *priv,
 864                          struct iwl3945_addsta_cmd *sta, u8 flags)
 865 {
 866         struct iwl_rx_packet *res = NULL;
 867         int rc = 0;
 868         struct iwl_host_cmd cmd = {
 869                 .id = REPLY_ADD_STA,
 870                 .len = sizeof(struct iwl3945_addsta_cmd),
 871                 .meta.flags = flags,
 872                 .data = sta,
 873         };
 874
 875         if (flags & CMD_ASYNC)
 876                 cmd.meta.u.callback = iwl3945_add_sta_sync_callback;
 877         else
 878                 cmd.meta.flags |= CMD_WANT_SKB;
 879
 880         rc = iwl_send_cmd(priv, &cmd);
 881
 882         if (rc || (flags & CMD_ASYNC))
 883                 return rc;
 884
 885         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 886         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 887                 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
 888                           res->hdr.flags);
 889                 rc = -EIO;
 890         }
 891
 892         if (rc == 0) {
 893                 switch (res->u.add_sta.status) {
 894                 case ADD_STA_SUCCESS_MSK:
 895                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
 896                         break;
 897                 default:
 898                         rc = -EIO;
 899                         IWL_WARN(priv, "REPLY_ADD_STA failed\n");
 900                         break;
 901                 }
 902         }
 903
 904         priv->alloc_rxb_skb--;
 905         dev_kfree_skb_any(cmd.meta.u.skb);
 906
 907         return rc;
 908 }
 909
 910 static int iwl3945_update_sta_key_info(struct iwl_priv *priv,
 911                                    struct ieee80211_key_conf *keyconf,
 912                                    u8 sta_id)
 913 {
 914         unsigned long flags;
 915         __le16 key_flags = 0;
 916
 917         switch (keyconf->alg) {
 918         case ALG_CCMP:
 919                 key_flags |= STA_KEY_FLG_CCMP;
 920                 key_flags |= cpu_to_le16(
 921                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 922                 key_flags &= ~STA_KEY_FLG_INVALID;
 923                 break;
 924         case ALG_TKIP:
 925         case ALG_WEP:
 926         default:
 927                 return -EINVAL;
 928         }
 929         spin_lock_irqsave(&priv->sta_lock, flags);
 930         priv->stations_39[sta_id].keyinfo.alg = keyconf->alg;
 931         priv->stations_39[sta_id].keyinfo.keylen = keyconf->keylen;
 932         memcpy(priv->stations_39[sta_id].keyinfo.key, keyconf->key,
 933                keyconf->keylen);
 934
 935         memcpy(priv->stations_39[sta_id].sta.key.key, keyconf->key,
 936                keyconf->keylen);
 937         priv->stations_39[sta_id].sta.key.key_flags = key_flags;
 938         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 939         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 940
 941         spin_unlock_irqrestore(&priv->sta_lock, flags);
 942
 943         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
 944         iwl3945_send_add_station(priv, &priv->stations_39[sta_id].sta, 0);
 945         return 0;
 946 }
 947
 948 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 949 {
 950         unsigned long flags;
 951
 952         spin_lock_irqsave(&priv->sta_lock, flags);
 953         memset(&priv->stations_39[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
 954         memset(&priv->stations_39[sta_id].sta.key, 0,
 955                 sizeof(struct iwl4965_keyinfo));
 956         priv->stations_39[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 957         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 958         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 959         spin_unlock_irqrestore(&priv->sta_lock, flags);
 960
 961         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
 962         iwl3945_send_add_station(priv, &priv->stations_39[sta_id].sta, 0);
 963         return 0;
 964 }
 965
 966 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 967 {
 968         struct list_head *element;
 969
 970         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
 971                        priv->frames_count);
 972
 973         while (!list_empty(&priv->free_frames)) {
 974                 element = priv->free_frames.next;
 975                 list_del(element);
 976                 kfree(list_entry(element, struct iwl3945_frame, list));
 977                 priv->frames_count--;
 978         }
 979
 980         if (priv->frames_count) {
 981                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 982                             priv->frames_count);
 983                 priv->frames_count = 0;
 984         }
 985 }
 986
 987 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 988 {
 989         struct iwl3945_frame *frame;
 990         struct list_head *element;
 991         if (list_empty(&priv->free_frames)) {
 992                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 993                 if (!frame) {
 994                         IWL_ERR(priv, "Could not allocate frame!\n");
 995                         return NULL;
 996                 }
 997
 998                 priv->frames_count++;
 999                 return frame;
1000         }
1001
1002         element = priv->free_frames.next;
1003         list_del(element);
1004         return list_entry(element, struct iwl3945_frame, list);
1005 }
1006
1007 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
1008 {
1009         memset(frame, 0, sizeof(*frame));
1010         list_add(&frame->list, &priv->free_frames);
1011 }
1012
1013 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
1014                                 struct ieee80211_hdr *hdr,
1015                                 int left)
1016 {
1017
1018         if (!iwl3945_is_associated(priv) || !priv->ibss_beacon ||
1019             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
1020              (priv->iw_mode != NL80211_IFTYPE_AP)))
1021                 return 0;
1022
1023         if (priv->ibss_beacon->len > left)
1024                 return 0;
1025
1026         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1027
1028         return priv->ibss_beacon->len;
1029 }
1030
1031 static u8 iwl3945_rate_get_lowest_plcp(struct iwl_priv *priv)
1032 {
1033         u8 i;
1034         int rate_mask;
1035
1036         /* Set rate mask*/
1037         if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK)
1038                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
1039         else
1040                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
1041
1042         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1043              i = iwl3945_rates[i].next_ieee) {
1044                 if (rate_mask & (1 << i))
1045                         return iwl3945_rates[i].plcp;
1046         }
1047
1048         /* No valid rate was found. Assign the lowest one */
1049         if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK)
1050                 return IWL_RATE_1M_PLCP;
1051         else
1052                 return IWL_RATE_6M_PLCP;
1053 }
1054
1055 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
1056 {
1057         struct iwl3945_frame *frame;
1058         unsigned int frame_size;
1059         int rc;
1060         u8 rate;
1061
1062         frame = iwl3945_get_free_frame(priv);
1063
1064         if (!frame) {
1065                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
1066                           "command.\n");
1067                 return -ENOMEM;
1068         }
1069
1070         rate = iwl3945_rate_get_lowest_plcp(priv);
1071
1072         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
1073
1074         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1075                               &frame->u.cmd[0]);
1076
1077         iwl3945_free_frame(priv, frame);
1078
1079         return rc;
1080 }
1081
1082 /******************************************************************************
1083  *
1084  * EEPROM related functions
1085  *
1086  ******************************************************************************/
1087
1088 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1089 {
1090         memcpy(mac, priv->eeprom39.mac_address, 6);
1091 }
1092
1093 /*
1094  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
1095  * embedded controller) as EEPROM reader; each read is a series of pulses
1096  * to/from the EEPROM chip, not a single event, so even reads could conflict
1097  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
1098  * simply claims ownership, which should be safe when this function is called
1099  * (i.e. before loading uCode!).
1100  */
1101 static inline int iwl3945_eeprom_acquire_semaphore(struct iwl_priv *priv)
1102 {
1103         _iwl_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
1104         return 0;
1105 }
1106
1107 /**
1108  * iwl3945_eeprom_init - read EEPROM contents
1109  *
1110  * Load the EEPROM contents from adapter into priv->eeprom39
1111  *
1112  * NOTE:  This routine uses the non-debug IO access functions.
1113  */
1114 int iwl3945_eeprom_init(struct iwl_priv *priv)
1115 {
1116         u16 *e = (u16 *)&priv->eeprom39;
1117         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1118         int sz = sizeof(priv->eeprom39);
1119         int ret;
1120         u16 addr;
1121
1122         /* The EEPROM structure has several padding buffers within it
1123          * and when adding new EEPROM maps is subject to programmer errors
1124          * which may be very difficult to identify without explicitly
1125          * checking the resulting size of the eeprom map. */
1126         BUILD_BUG_ON(sizeof(priv->eeprom39) != IWL_EEPROM_IMAGE_SIZE);
1127
1128         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1129                 IWL_ERR(priv, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);
1130                 return -ENOENT;
1131         }
1132
1133         /* Make sure driver (instead of uCode) is allowed to read EEPROM */
1134         ret = iwl3945_eeprom_acquire_semaphore(priv);
1135         if (ret < 0) {
1136                 IWL_ERR(priv, "Failed to acquire EEPROM semaphore.\n");
1137                 return -ENOENT;
1138         }
1139
1140         /* eeprom is an array of 16bit values */
1141         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1142                 u32 r;
1143
1144                 _iwl_write32(priv, CSR_EEPROM_REG,
1145                                  CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
1146                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1147                 ret = iwl_poll_direct_bit(priv, CSR_EEPROM_REG,
1148                                               CSR_EEPROM_REG_READ_VALID_MSK,
1149                                               IWL_EEPROM_ACCESS_TIMEOUT);
1150                 if (ret < 0) {
1151                         IWL_ERR(priv, "Time out reading EEPROM[%d]\n", addr);
1152                         return ret;
1153                 }
1154
1155                 r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
1156                 e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
1157         }
1158
1159         return 0;
1160 }
1161
1162 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
1163 {
1164         if (priv->shared_virt)
1165                 pci_free_consistent(priv->pci_dev,
1166                                     sizeof(struct iwl3945_shared),
1167                                     priv->shared_virt,
1168                                     priv->shared_phys);
1169 }
1170
1171 /**
1172  * iwl3945_supported_rate_to_ie - fill in the supported rate in IE field
1173  *
1174  * return : set the bit for each supported rate insert in ie
1175  */
1176 static u16 iwl3945_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1177                                     u16 basic_rate, int *left)
1178 {
1179         u16 ret_rates = 0, bit;
1180         int i;
1181         u8 *cnt = ie;
1182         u8 *rates = ie + 1;
1183
1184         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1185                 if (bit & supported_rate) {
1186                         ret_rates |= bit;
1187                         rates[*cnt] = iwl3945_rates[i].ieee |
1188                                 ((bit & basic_rate) ? 0x80 : 0x00);
1189                         (*cnt)++;
1190                         (*left)--;
1191                         if ((*left <= 0) ||
1192                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1193                                 break;
1194                 }
1195         }
1196
1197         return ret_rates;
1198 }
1199
1200 /**
1201  * iwl3945_fill_probe_req - fill in all required fields and IE for probe request
1202  */
1203 static u16 iwl3945_fill_probe_req(struct iwl_priv *priv,
1204                               struct ieee80211_mgmt *frame,
1205                               int left)
1206 {
1207         int len = 0;
1208         u8 *pos = NULL;
1209         u16 active_rates, ret_rates, cck_rates;
1210
1211         /* Make sure there is enough space for the probe request,
1212          * two mandatory IEs and the data */
1213         left -= 24;
1214         if (left < 0)
1215                 return 0;
1216         len += 24;
1217
1218         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1219         memcpy(frame->da, iwl_bcast_addr, ETH_ALEN);
1220         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1221         memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN);
1222         frame->seq_ctrl = 0;
1223
1224         /* fill in our indirect SSID IE */
1225         /* ...next IE... */
1226
1227         left -= 2;
1228         if (left < 0)
1229                 return 0;
1230         len += 2;
1231         pos = &(frame->u.probe_req.variable[0]);
1232         *pos++ = WLAN_EID_SSID;
1233         *pos++ = 0;
1234
1235         /* fill in supported rate */
1236         /* ...next IE... */
1237         left -= 2;
1238         if (left < 0)
1239                 return 0;
1240
1241         /* ... fill it in... */
1242         *pos++ = WLAN_EID_SUPP_RATES;
1243         *pos = 0;
1244
1245         priv->active_rate = priv->rates_mask;
1246         active_rates = priv->active_rate;
1247         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1248
1249         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1250         ret_rates = iwl3945_supported_rate_to_ie(pos, cck_rates,
1251                         priv->active_rate_basic, &left);
1252         active_rates &= ~ret_rates;
1253
1254         ret_rates = iwl3945_supported_rate_to_ie(pos, active_rates,
1255                                  priv->active_rate_basic, &left);
1256         active_rates &= ~ret_rates;
1257
1258         len += 2 + *pos;
1259         pos += (*pos) + 1;
1260         if (active_rates == 0)
1261                 goto fill_end;
1262
1263         /* fill in supported extended rate */
1264         /* ...next IE... */
1265         left -= 2;
1266         if (left < 0)
1267                 return 0;
1268         /* ... fill it in... */
1269         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1270         *pos = 0;
1271         iwl3945_supported_rate_to_ie(pos, active_rates,
1272                                  priv->active_rate_basic, &left);
1273         if (*pos > 0)
1274                 len += 2 + *pos;
1275
1276  fill_end:
1277         return (u16)len;
1278 }
1279
1280 /*
1281  * QoS  support
1282 */
1283 static int iwl3945_send_qos_params_command(struct iwl_priv *priv,
1284                                        struct iwl_qosparam_cmd *qos)
1285 {
1286
1287         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1288                                 sizeof(struct iwl_qosparam_cmd), qos);
1289 }
1290
1291 static void iwl3945_activate_qos(struct iwl_priv *priv, u8 force)
1292 {
1293         unsigned long flags;
1294
1295         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1296                 return;
1297
1298         spin_lock_irqsave(&priv->lock, flags);
1299         priv->qos_data.def_qos_parm.qos_flags = 0;
1300
1301         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1302             !priv->qos_data.qos_cap.q_AP.txop_request)
1303                 priv->qos_data.def_qos_parm.qos_flags |=
1304                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1305
1306         if (priv->qos_data.qos_active)
1307                 priv->qos_data.def_qos_parm.qos_flags |=
1308                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1309
1310         spin_unlock_irqrestore(&priv->lock, flags);
1311
1312         if (force || iwl3945_is_associated(priv)) {
1313                 IWL_DEBUG_QOS("send QoS cmd with QoS active %d \n",
1314                               priv->qos_data.qos_active);
1315
1316                 iwl3945_send_qos_params_command(priv,
1317                                 &(priv->qos_data.def_qos_parm));
1318         }
1319 }
1320
1321 /*
1322  * Power management (not Tx power!) functions
1323  */
1324 #define MSEC_TO_USEC 1024
1325
1326
1327 /* default power management (not Tx power) table values */
1328 /* for TIM  0-10 */
1329 static struct iwl_power_vec_entry range_0[IWL_POWER_MAX] = {
1330         {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1331         {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1332         {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1333         {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1334         {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1335         {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1336 };
1337
1338 /* for TIM > 10 */
1339 static struct iwl_power_vec_entry range_1[IWL_POWER_MAX] = {
1340         {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1341         {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1342         {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1343         {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1344         {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1345         {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1346 };
1347
1348 int iwl3945_power_init_handle(struct iwl_priv *priv)
1349 {
1350         int rc = 0, i;
1351         struct iwl_power_mgr *pow_data;
1352         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_MAX;
1353         u16 pci_pm;
1354
1355         IWL_DEBUG_POWER("Initialize power \n");
1356
1357         pow_data = &priv->power_data;
1358
1359         memset(pow_data, 0, sizeof(*pow_data));
1360
1361         pow_data->dtim_period = 1;
1362
1363         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1364         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1365
1366         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1367         if (rc != 0)
1368                 return 0;
1369         else {
1370                 struct iwl_powertable_cmd *cmd;
1371
1372                 IWL_DEBUG_POWER("adjust power command flags\n");
1373
1374                 for (i = 0; i < IWL_POWER_MAX; i++) {
1375                         cmd = &pow_data->pwr_range_0[i].cmd;
1376
1377                         if (pci_pm & 0x1)
1378                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1379                         else
1380                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1381                 }
1382         }
1383         return rc;
1384 }
1385
1386 static int iwl3945_update_power_cmd(struct iwl_priv *priv,
1387                                 struct iwl_powertable_cmd *cmd, u32 mode)
1388 {
1389         struct iwl_power_mgr *pow_data;
1390         struct iwl_power_vec_entry *range;
1391         u32 max_sleep = 0;
1392         int i;
1393         u8 period = 0;
1394         bool skip;
1395
1396         if (mode > IWL_POWER_INDEX_5) {
1397                 IWL_DEBUG_POWER("Error invalid power mode \n");
1398                 return -EINVAL;
1399         }
1400         pow_data = &priv->power_data;
1401
1402         if (pow_data->dtim_period < 10)
1403                 range = &pow_data->pwr_range_0[0];
1404         else
1405                 range = &pow_data->pwr_range_1[1];
1406
1407         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl3945_powertable_cmd));
1408
1409
1410         if (period == 0) {
1411                 period = 1;
1412                 skip = false;
1413         } else {
1414                 skip = !!range[mode].no_dtim;
1415         }
1416
1417         if (skip) {
1418                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1419                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1420                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1421         } else {
1422                 max_sleep = period;
1423                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1424         }
1425
1426         for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
1427                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1428                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1429
1430         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1431         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1432         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1433         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1434                         le32_to_cpu(cmd->sleep_interval[0]),
1435                         le32_to_cpu(cmd->sleep_interval[1]),
1436                         le32_to_cpu(cmd->sleep_interval[2]),
1437                         le32_to_cpu(cmd->sleep_interval[3]),
1438                         le32_to_cpu(cmd->sleep_interval[4]));
1439
1440         return 0;
1441 }
1442
1443 static int iwl3945_send_power_mode(struct iwl_priv *priv, u32 mode)
1444 {
1445         u32 uninitialized_var(final_mode);
1446         int rc;
1447         struct iwl_powertable_cmd cmd;
1448
1449         /* If on battery, set to 3,
1450          * if plugged into AC power, set to CAM ("continuously aware mode"),
1451          * else user level */
1452         switch (mode) {
1453         case IWL39_POWER_BATTERY:
1454                 final_mode = IWL_POWER_INDEX_3;
1455                 break;
1456         case IWL39_POWER_AC:
1457                 final_mode = IWL_POWER_MODE_CAM;
1458                 break;
1459         default:
1460                 final_mode = mode;
1461                 break;
1462         }
1463
1464         iwl3945_update_power_cmd(priv, &cmd, final_mode);
1465
1466         /* FIXME use get_hcmd_size 3945 command is 4 bytes shorter */
1467         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD,
1468                               sizeof(struct iwl3945_powertable_cmd), &cmd);
1469
1470         if (final_mode == IWL_POWER_MODE_CAM)
1471                 clear_bit(STATUS_POWER_PMI, &priv->status);
1472         else
1473                 set_bit(STATUS_POWER_PMI, &priv->status);
1474
1475         return rc;
1476 }
1477
1478 #define MAX_UCODE_BEACON_INTERVAL       1024
1479 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1480
1481 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
1482 {
1483         u16 new_val = 0;
1484         u16 beacon_factor = 0;
1485
1486         beacon_factor =
1487             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1488                 / MAX_UCODE_BEACON_INTERVAL;
1489         new_val = beacon_val / beacon_factor;
1490
1491         return cpu_to_le16(new_val);
1492 }
1493
1494 static void iwl3945_setup_rxon_timing(struct iwl_priv *priv)
1495 {
1496         u64 interval_tm_unit;
1497         u64 tsf, result;
1498         unsigned long flags;
1499         struct ieee80211_conf *conf = NULL;
1500         u16 beacon_int = 0;
1501
1502         conf = ieee80211_get_hw_conf(priv->hw);
1503
1504         spin_lock_irqsave(&priv->lock, flags);
1505         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
1506         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1507
1508         tsf = priv->timestamp;
1509
1510         beacon_int = priv->beacon_int;
1511         spin_unlock_irqrestore(&priv->lock, flags);
1512
1513         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
1514                 if (beacon_int == 0) {
1515                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1516                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1517                 } else {
1518                         priv->rxon_timing.beacon_interval =
1519                                 cpu_to_le16(beacon_int);
1520                         priv->rxon_timing.beacon_interval =
1521                             iwl3945_adjust_beacon_interval(
1522                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1523                 }
1524
1525                 priv->rxon_timing.atim_window = 0;
1526         } else {
1527                 priv->rxon_timing.beacon_interval =
1528                         iwl3945_adjust_beacon_interval(conf->beacon_int);
1529                 /* TODO: we need to get atim_window from upper stack
1530                  * for now we set to 0 */
1531                 priv->rxon_timing.atim_window = 0;
1532         }
1533
1534         interval_tm_unit =
1535                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1536         result = do_div(tsf, interval_tm_unit);
1537         priv->rxon_timing.beacon_init_val =
1538             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1539
1540         IWL_DEBUG_ASSOC
1541             ("beacon interval %d beacon timer %d beacon tim %d\n",
1542                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1543                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1544                 le16_to_cpu(priv->rxon_timing.atim_window));
1545 }
1546
1547 static int iwl3945_scan_initiate(struct iwl_priv *priv)
1548 {
1549         if (!iwl_is_ready_rf(priv)) {
1550                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1551                 return -EIO;
1552         }
1553
1554         if (test_bit(STATUS_SCANNING, &priv->status)) {
1555                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1556                 return -EAGAIN;
1557         }
1558
1559         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1560                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1561                                "Queuing.\n");
1562                 return -EAGAIN;
1563         }
1564
1565         IWL_DEBUG_INFO("Starting scan...\n");
1566         if (priv->cfg->sku & IWL_SKU_G)
1567                 priv->scan_bands |= BIT(IEEE80211_BAND_2GHZ);
1568         if (priv->cfg->sku & IWL_SKU_A)
1569                 priv->scan_bands |= BIT(IEEE80211_BAND_5GHZ);
1570         set_bit(STATUS_SCANNING, &priv->status);
1571         priv->scan_start = jiffies;
1572         priv->scan_pass_start = priv->scan_start;
1573
1574         queue_work(priv->workqueue, &priv->request_scan);
1575
1576         return 0;
1577 }
1578
1579 static int iwl3945_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
1580 {
1581         struct iwl3945_rxon_cmd *rxon = &priv->staging39_rxon;
1582
1583         if (hw_decrypt)
1584                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
1585         else
1586                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
1587
1588         return 0;
1589 }
1590
1591 static void iwl3945_set_flags_for_phymode(struct iwl_priv *priv,
1592                                           enum ieee80211_band band)
1593 {
1594         if (band == IEEE80211_BAND_5GHZ) {
1595                 priv->staging39_rxon.flags &=
1596                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1597                       | RXON_FLG_CCK_MSK);
1598                 priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1599         } else {
1600                 /* Copied from iwl3945_bg_post_associate() */
1601                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1602                         priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1603                 else
1604                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1605
1606                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1607                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1608
1609                 priv->staging39_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1610                 priv->staging39_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1611                 priv->staging39_rxon.flags &= ~RXON_FLG_CCK_MSK;
1612         }
1613 }
1614
1615 /*
1616  * initialize rxon structure with default values from eeprom
1617  */
1618 static void iwl3945_connection_init_rx_config(struct iwl_priv *priv,
1619                                               int mode)
1620 {
1621         const struct iwl_channel_info *ch_info;
1622
1623         memset(&priv->staging39_rxon, 0, sizeof(priv->staging39_rxon));
1624
1625         switch (mode) {
1626         case NL80211_IFTYPE_AP:
1627                 priv->staging39_rxon.dev_type = RXON_DEV_TYPE_AP;
1628                 break;
1629
1630         case NL80211_IFTYPE_STATION:
1631                 priv->staging39_rxon.dev_type = RXON_DEV_TYPE_ESS;
1632                 priv->staging39_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1633                 break;
1634
1635         case NL80211_IFTYPE_ADHOC:
1636                 priv->staging39_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1637                 priv->staging39_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1638                 priv->staging39_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1639                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1640                 break;
1641
1642         case NL80211_IFTYPE_MONITOR:
1643                 priv->staging39_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
1644                 priv->staging39_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
1645                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
1646                 break;
1647         default:
1648                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1649                 break;
1650         }
1651
1652 #if 0
1653         /* TODO:  Figure out when short_preamble would be set and cache from
1654          * that */
1655         if (!hw_to_local(priv->hw)->short_preamble)
1656                 priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1657         else
1658                 priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1659 #endif
1660
1661         ch_info = iwl3945_get_channel_info(priv, priv->band,
1662                                        le16_to_cpu(priv->active39_rxon.channel));
1663
1664         if (!ch_info)
1665                 ch_info = &priv->channel_info[0];
1666
1667         /*
1668          * in some case A channels are all non IBSS
1669          * in this case force B/G channel
1670          */
1671         if ((mode == NL80211_IFTYPE_ADHOC) && !(is_channel_ibss(ch_info)))
1672                 ch_info = &priv->channel_info[0];
1673
1674         priv->staging39_rxon.channel = cpu_to_le16(ch_info->channel);
1675         if (is_channel_a_band(ch_info))
1676                 priv->band = IEEE80211_BAND_5GHZ;
1677         else
1678                 priv->band = IEEE80211_BAND_2GHZ;
1679
1680         iwl3945_set_flags_for_phymode(priv, priv->band);
1681
1682         priv->staging39_rxon.ofdm_basic_rates =
1683             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1684         priv->staging39_rxon.cck_basic_rates =
1685             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1686 }
1687
1688 static int iwl3945_set_mode(struct iwl_priv *priv, int mode)
1689 {
1690         if (mode == NL80211_IFTYPE_ADHOC) {
1691                 const struct iwl_channel_info *ch_info;
1692
1693                 ch_info = iwl3945_get_channel_info(priv,
1694                         priv->band,
1695                         le16_to_cpu(priv->staging39_rxon.channel));
1696
1697                 if (!ch_info || !is_channel_ibss(ch_info)) {
1698                         IWL_ERR(priv, "channel %d not IBSS channel\n",
1699                                   le16_to_cpu(priv->staging39_rxon.channel));
1700                         return -EINVAL;
1701                 }
1702         }
1703
1704         iwl3945_connection_init_rx_config(priv, mode);
1705         memcpy(priv->staging39_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1706
1707         iwl3945_clear_stations_table(priv);
1708
1709         /* don't commit rxon if rf-kill is on*/
1710         if (!iwl_is_ready_rf(priv))
1711                 return -EAGAIN;
1712
1713         cancel_delayed_work(&priv->scan_check);
1714         if (iwl_scan_cancel_timeout(priv, 100)) {
1715                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1716                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
1717                 return -EAGAIN;
1718         }
1719
1720         iwl3945_commit_rxon(priv);
1721
1722         return 0;
1723 }
1724
1725 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
1726                                       struct ieee80211_tx_info *info,
1727                                       struct iwl_cmd *cmd,
1728                                       struct sk_buff *skb_frag,
1729                                       int last_frag)
1730 {
1731         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
1732         struct iwl3945_hw_key *keyinfo =
1733             &priv->stations_39[info->control.hw_key->hw_key_idx].keyinfo;
1734
1735         switch (keyinfo->alg) {
1736         case ALG_CCMP:
1737                 tx->sec_ctl = TX_CMD_SEC_CCM;
1738                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
1739                 IWL_DEBUG_TX("tx_cmd with AES hwcrypto\n");
1740                 break;
1741
1742         case ALG_TKIP:
1743 #if 0
1744                 tx->sec_ctl = TX_CMD_SEC_TKIP;
1745
1746                 if (last_frag)
1747                         memcpy(tx->tkip_mic.byte, skb_frag->tail - 8,
1748                                8);
1749                 else
1750                         memset(tx->tkip_mic.byte, 0, 8);
1751 #endif
1752                 break;
1753
1754         case ALG_WEP:
1755                 tx->sec_ctl = TX_CMD_SEC_WEP |
1756                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
1757
1758                 if (keyinfo->keylen == 13)
1759                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
1760
1761                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
1762
1763                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
1764                              "with key %d\n", info->control.hw_key->hw_key_idx);
1765                 break;
1766
1767         default:
1768                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
1769                 break;
1770         }
1771 }
1772
1773 /*
1774  * handle build REPLY_TX command notification.
1775  */
1776 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
1777                                   struct iwl_cmd *cmd,
1778                                   struct ieee80211_tx_info *info,
1779                                   struct ieee80211_hdr *hdr, u8 std_id)
1780 {
1781         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
1782         __le32 tx_flags = tx->tx_flags;
1783         __le16 fc = hdr->frame_control;
1784         u8 rc_flags = info->control.rates[0].flags;
1785
1786         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
1787         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1788                 tx_flags |= TX_CMD_FLG_ACK_MSK;
1789                 if (ieee80211_is_mgmt(fc))
1790                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1791                 if (ieee80211_is_probe_resp(fc) &&
1792                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
1793                         tx_flags |= TX_CMD_FLG_TSF_MSK;
1794         } else {
1795                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
1796                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1797         }
1798
1799         tx->sta_id = std_id;
1800         if (ieee80211_has_morefrags(fc))
1801                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
1802
1803         if (ieee80211_is_data_qos(fc)) {
1804                 u8 *qc = ieee80211_get_qos_ctl(hdr);
1805                 tx->tid_tspec = qc[0] & 0xf;
1806                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
1807         } else {
1808                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
1809         }
1810
1811         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
1812                 tx_flags |= TX_CMD_FLG_RTS_MSK;
1813                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
1814         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
1815                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1816                 tx_flags |= TX_CMD_FLG_CTS_MSK;
1817         }
1818
1819         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
1820                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
1821
1822         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
1823         if (ieee80211_is_mgmt(fc)) {
1824                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
1825                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
1826                 else
1827                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
1828         } else {
1829                 tx->timeout.pm_frame_timeout = 0;
1830 #ifdef CONFIG_IWL3945_LEDS
1831                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
1832 #endif
1833         }
1834
1835         tx->driver_txop = 0;
1836         tx->tx_flags = tx_flags;
1837         tx->next_frame_len = 0;
1838 }
1839
1840 /**
1841  * iwl3945_get_sta_id - Find station's index within station table
1842  */
1843 static int iwl3945_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1844 {
1845         int sta_id;
1846         u16 fc = le16_to_cpu(hdr->frame_control);
1847
1848         /* If this frame is broadcast or management, use broadcast station id */
1849         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
1850             is_multicast_ether_addr(hdr->addr1))
1851                 return priv->hw_params.bcast_sta_id;
1852
1853         switch (priv->iw_mode) {
1854
1855         /* If we are a client station in a BSS network, use the special
1856          * AP station entry (that's the only station we communicate with) */
1857         case NL80211_IFTYPE_STATION:
1858                 return IWL_AP_ID;
1859
1860         /* If we are an AP, then find the station, or use BCAST */
1861         case NL80211_IFTYPE_AP:
1862                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
1863                 if (sta_id != IWL_INVALID_STATION)
1864                         return sta_id;
1865                 return priv->hw_params.bcast_sta_id;
1866
1867         /* If this frame is going out to an IBSS network, find the station,
1868          * or create a new station table entry */
1869         case NL80211_IFTYPE_ADHOC: {
1870                 /* Create new station table entry */
1871                 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
1872                 if (sta_id != IWL_INVALID_STATION)
1873                         return sta_id;
1874
1875                 sta_id = iwl3945_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
1876
1877                 if (sta_id != IWL_INVALID_STATION)
1878                         return sta_id;
1879
1880                 IWL_DEBUG_DROP("Station %pM not in station map. "
1881                                "Defaulting to broadcast...\n",
1882                                hdr->addr1);
1883                 iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
1884                 return priv->hw_params.bcast_sta_id;
1885         }
1886         /* If we are in monitor mode, use BCAST. This is required for
1887          * packet injection. */
1888         case NL80211_IFTYPE_MONITOR:
1889                 return priv->hw_params.bcast_sta_id;
1890
1891         default:
1892                 IWL_WARN(priv, "Unknown mode of operation: %d\n",
1893                         priv->iw_mode);
1894                 return priv->hw_params.bcast_sta_id;
1895         }
1896 }
1897
1898 /*
1899  * start REPLY_TX command process
1900  */
1901 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
1902 {
1903         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1904         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1905         struct iwl3945_tx_cmd *tx;
1906         struct iwl_tx_queue *txq = NULL;
1907         struct iwl_queue *q = NULL;
1908         struct iwl_cmd *out_cmd = NULL;
1909         dma_addr_t phys_addr;
1910         dma_addr_t txcmd_phys;
1911         int txq_id = skb_get_queue_mapping(skb);
1912         u16 len, idx, len_org, hdr_len;
1913         u8 id;
1914         u8 unicast;
1915         u8 sta_id;
1916         u8 tid = 0;
1917         u16 seq_number = 0;
1918         __le16 fc;
1919         u8 wait_write_ptr = 0;
1920         u8 *qc = NULL;
1921         unsigned long flags;
1922         int rc;
1923
1924         spin_lock_irqsave(&priv->lock, flags);
1925         if (iwl_is_rfkill(priv)) {
1926                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
1927                 goto drop_unlock;
1928         }
1929
1930         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
1931                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
1932                 goto drop_unlock;
1933         }
1934
1935         unicast = !is_multicast_ether_addr(hdr->addr1);
1936         id = 0;
1937
1938         fc = hdr->frame_control;
1939
1940 #ifdef CONFIG_IWL3945_DEBUG
1941         if (ieee80211_is_auth(fc))
1942                 IWL_DEBUG_TX("Sending AUTH frame\n");
1943         else if (ieee80211_is_assoc_req(fc))
1944                 IWL_DEBUG_TX("Sending ASSOC frame\n");
1945         else if (ieee80211_is_reassoc_req(fc))
1946                 IWL_DEBUG_TX("Sending REASSOC frame\n");
1947 #endif
1948
1949         /* drop all data frame if we are not associated */
1950         if (ieee80211_is_data(fc) &&
1951             (priv->iw_mode != NL80211_IFTYPE_MONITOR) && /* packet injection */
1952             (!iwl3945_is_associated(priv) ||
1953              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
1954                 IWL_DEBUG_DROP("Dropping - !iwl3945_is_associated\n");
1955                 goto drop_unlock;
1956         }
1957
1958         spin_unlock_irqrestore(&priv->lock, flags);
1959
1960         hdr_len = ieee80211_hdrlen(fc);
1961
1962         /* Find (or create) index into station table for destination station */
1963         sta_id = iwl3945_get_sta_id(priv, hdr);
1964         if (sta_id == IWL_INVALID_STATION) {
1965                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %pM\n",
1966                                hdr->addr1);
1967                 goto drop;
1968         }
1969
1970         IWL_DEBUG_RATE("station Id %d\n", sta_id);
1971
1972         if (ieee80211_is_data_qos(fc)) {
1973                 qc = ieee80211_get_qos_ctl(hdr);
1974                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
1975                 seq_number = priv->stations_39[sta_id].tid[tid].seq_number &
1976                                 IEEE80211_SCTL_SEQ;
1977                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
1978                         (hdr->seq_ctrl &
1979                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
1980                 seq_number += 0x10;
1981         }
1982
1983         /* Descriptor for chosen Tx queue */
1984         txq = &priv->txq[txq_id];
1985         q = &txq->q;
1986
1987         spin_lock_irqsave(&priv->lock, flags);
1988
1989         idx = get_cmd_index(q, q->write_ptr, 0);
1990
1991         /* Set up driver data for this TFD */
1992         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
1993         txq->txb[q->write_ptr].skb[0] = skb;
1994
1995         /* Init first empty entry in queue's array of Tx/cmd buffers */
1996         out_cmd = txq->cmd[idx];
1997         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
1998         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
1999         memset(tx, 0, sizeof(*tx));
2000
2001         /*
2002          * Set up the Tx-command (not MAC!) header.
2003          * Store the chosen Tx queue and TFD index within the sequence field;
2004          * after Tx, uCode's Tx response will return this value so driver can
2005          * locate the frame within the tx queue and do post-tx processing.
2006          */
2007         out_cmd->hdr.cmd = REPLY_TX;
2008         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2009                                 INDEX_TO_SEQ(q->write_ptr)));
2010
2011         /* Copy MAC header from skb into command buffer */
2012         memcpy(tx->hdr, hdr, hdr_len);
2013
2014         /*
2015          * Use the first empty entry in this queue's command buffer array
2016          * to contain the Tx command and MAC header concatenated together
2017          * (payload data will be in another buffer).
2018          * Size of this varies, due to varying MAC header length.
2019          * If end is not dword aligned, we'll have 2 extra bytes at the end
2020          * of the MAC header (device reads on dword boundaries).
2021          * We'll tell device about this padding later.
2022          */
2023         len = sizeof(struct iwl3945_tx_cmd) +
2024                         sizeof(struct iwl_cmd_header) + hdr_len;
2025
2026         len_org = len;
2027         len = (len + 3) & ~3;
2028
2029         if (len_org != len)
2030                 len_org = 1;
2031         else
2032                 len_org = 0;
2033
2034         /* Physical address of this Tx command's header (not MAC header!),
2035          * within command buffer array. */
2036         txcmd_phys = pci_map_single(priv->pci_dev,
2037                                     out_cmd, sizeof(struct iwl_cmd),
2038                                     PCI_DMA_TODEVICE);
2039         pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys);
2040         pci_unmap_len_set(&out_cmd->meta, len, sizeof(struct iwl_cmd));
2041         /* Add buffer containing Tx command and MAC(!) header to TFD's
2042          * first entry */
2043         txcmd_phys += offsetof(struct iwl_cmd, hdr);
2044
2045         /* Add buffer containing Tx command and MAC(!) header to TFD's
2046          * first entry */
2047         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
2048                                                    txcmd_phys, len, 1, 0);
2049
2050         if (info->control.hw_key)
2051                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, 0);
2052
2053         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2054          * if any (802.11 null frames have no payload). */
2055         len = skb->len - hdr_len;
2056         if (len) {
2057                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2058                                            len, PCI_DMA_TODEVICE);
2059                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
2060                                                            phys_addr, len,
2061                                                            0, U32_PAD(len));
2062         }
2063
2064         /* Total # bytes to be transmitted */
2065         len = (u16)skb->len;
2066         tx->len = cpu_to_le16(len);
2067
2068         /* TODO need this for burst mode later on */
2069         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
2070
2071         /* set is_hcca to 0; it probably will never be implemented */
2072         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
2073
2074         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
2075         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
2076
2077         if (!ieee80211_has_morefrags(hdr->frame_control)) {
2078                 txq->need_update = 1;
2079                 if (qc)
2080                         priv->stations_39[sta_id].tid[tid].seq_number = seq_number;
2081         } else {
2082                 wait_write_ptr = 1;
2083                 txq->need_update = 0;
2084         }
2085
2086         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
2087
2088         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
2089                            ieee80211_hdrlen(fc));
2090
2091         /* Tell device the write index *just past* this latest filled TFD */
2092         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2093         rc = iwl_txq_update_write_ptr(priv, txq);
2094         spin_unlock_irqrestore(&priv->lock, flags);
2095
2096         if (rc)
2097                 return rc;
2098
2099         if ((iwl_queue_space(q) < q->high_mark)
2100             && priv->mac80211_registered) {
2101                 if (wait_write_ptr) {
2102                         spin_lock_irqsave(&priv->lock, flags);
2103                         txq->need_update = 1;
2104                         iwl_txq_update_write_ptr(priv, txq);
2105                         spin_unlock_irqrestore(&priv->lock, flags);
2106                 }
2107
2108                 ieee80211_stop_queue(priv->hw, skb_get_queue_mapping(skb));
2109         }
2110
2111         return 0;
2112
2113 drop_unlock:
2114         spin_unlock_irqrestore(&priv->lock, flags);
2115 drop:
2116         return -1;
2117 }
2118
2119 static void iwl3945_set_rate(struct iwl_priv *priv)
2120 {
2121         const struct ieee80211_supported_band *sband = NULL;
2122         struct ieee80211_rate *rate;
2123         int i;
2124
2125         sband = iwl_get_hw_mode(priv, priv->band);
2126         if (!sband) {
2127                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
2128                 return;
2129         }
2130
2131         priv->active_rate = 0;
2132         priv->active_rate_basic = 0;
2133
2134         IWL_DEBUG_RATE("Setting rates for %s GHz\n",
2135                        sband->band == IEEE80211_BAND_2GHZ ? "2.4" : "5");
2136
2137         for (i = 0; i < sband->n_bitrates; i++) {
2138                 rate = &sband->bitrates[i];
2139                 if ((rate->hw_value < IWL_RATE_COUNT) &&
2140                     !(rate->flags & IEEE80211_CHAN_DISABLED)) {
2141                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)\n",
2142                                        rate->hw_value, iwl3945_rates[rate->hw_value].plcp);
2143                         priv->active_rate |= (1 << rate->hw_value);
2144                 }
2145         }
2146
2147         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2148                        priv->active_rate, priv->active_rate_basic);
2149
2150         /*
2151          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2152          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2153          * OFDM
2154          */
2155         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2156                 priv->staging39_rxon.cck_basic_rates =
2157                     ((priv->active_rate_basic &
2158                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2159         else
2160                 priv->staging39_rxon.cck_basic_rates =
2161                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2162
2163         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2164                 priv->staging39_rxon.ofdm_basic_rates =
2165                     ((priv->active_rate_basic &
2166                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2167                       IWL_FIRST_OFDM_RATE) & 0xFF;
2168         else
2169                 priv->staging39_rxon.ofdm_basic_rates =
2170                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2171 }
2172
2173 static void iwl3945_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2174 {
2175         unsigned long flags;
2176
2177         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2178                 return;
2179
2180         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2181                           disable_radio ? "OFF" : "ON");
2182
2183         if (disable_radio) {
2184                 iwl_scan_cancel(priv);
2185                 /* FIXME: This is a workaround for AP */
2186                 if (priv->iw_mode != NL80211_IFTYPE_AP) {
2187                         spin_lock_irqsave(&priv->lock, flags);
2188                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2189                                     CSR_UCODE_SW_BIT_RFKILL);
2190                         spin_unlock_irqrestore(&priv->lock, flags);
2191                         iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
2192                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2193                 }
2194                 return;
2195         }
2196
2197         spin_lock_irqsave(&priv->lock, flags);
2198         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2199
2200         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2201         spin_unlock_irqrestore(&priv->lock, flags);
2202
2203         /* wake up ucode */
2204         msleep(10);
2205
2206         spin_lock_irqsave(&priv->lock, flags);
2207         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2208         if (!iwl_grab_nic_access(priv))
2209                 iwl_release_nic_access(priv);
2210         spin_unlock_irqrestore(&priv->lock, flags);
2211
2212         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2213                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2214                                   "disabled by HW switch\n");
2215                 return;
2216         }
2217
2218         if (priv->is_open)
2219                 queue_work(priv->workqueue, &priv->restart);
2220         return;
2221 }
2222
2223 void iwl3945_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2224                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2225 {
2226         u16 fc =
2227             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2228
2229         if (priv->active39_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2230                 return;
2231
2232         if (!(fc & IEEE80211_FCTL_PROTECTED))
2233                 return;
2234
2235         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2236         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2237         case RX_RES_STATUS_SEC_TYPE_TKIP:
2238                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2239                     RX_RES_STATUS_BAD_ICV_MIC)
2240                         stats->flag |= RX_FLAG_MMIC_ERROR;
2241         case RX_RES_STATUS_SEC_TYPE_WEP:
2242         case RX_RES_STATUS_SEC_TYPE_CCMP:
2243                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2244                     RX_RES_STATUS_DECRYPT_OK) {
2245                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2246                         stats->flag |= RX_FLAG_DECRYPTED;
2247                 }
2248                 break;
2249
2250         default:
2251                 break;
2252         }
2253 }
2254
2255 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2256
2257 #include "iwl-spectrum.h"
2258
2259 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2260 #define BEACON_TIME_MASK_HIGH   0xFF000000
2261 #define TIME_UNIT               1024
2262
2263 /*
2264  * extended beacon time format
2265  * time in usec will be changed into a 32-bit value in 8:24 format
2266  * the high 1 byte is the beacon counts
2267  * the lower 3 bytes is the time in usec within one beacon interval
2268  */
2269
2270 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
2271 {
2272         u32 quot;
2273         u32 rem;
2274         u32 interval = beacon_interval * 1024;
2275
2276         if (!interval || !usec)
2277                 return 0;
2278
2279         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2280         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2281
2282         return (quot << 24) + rem;
2283 }
2284
2285 /* base is usually what we get from ucode with each received frame,
2286  * the same as HW timer counter counting down
2287  */
2288
2289 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2290 {
2291         u32 base_low = base & BEACON_TIME_MASK_LOW;
2292         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2293         u32 interval = beacon_interval * TIME_UNIT;
2294         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2295             (addon & BEACON_TIME_MASK_HIGH);
2296
2297         if (base_low > addon_low)
2298                 res += base_low - addon_low;
2299         else if (base_low < addon_low) {
2300                 res += interval + base_low - addon_low;
2301                 res += (1 << 24);
2302         } else
2303                 res += (1 << 24);
2304
2305         return cpu_to_le32(res);
2306 }
2307
2308 static int iwl3945_get_measurement(struct iwl_priv *priv,
2309                                struct ieee80211_measurement_params *params,
2310                                u8 type)
2311 {
2312         struct iwl_spectrum_cmd spectrum;
2313         struct iwl_rx_packet *res;
2314         struct iwl_host_cmd cmd = {
2315                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2316                 .data = (void *)&spectrum,
2317                 .meta.flags = CMD_WANT_SKB,
2318         };
2319         u32 add_time = le64_to_cpu(params->start_time);
2320         int rc;
2321         int spectrum_resp_status;
2322         int duration = le16_to_cpu(params->duration);
2323
2324         if (iwl3945_is_associated(priv))
2325                 add_time =
2326                     iwl3945_usecs_to_beacons(
2327                         le64_to_cpu(params->start_time) - priv->last_tsf,
2328                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2329
2330         memset(&spectrum, 0, sizeof(spectrum));
2331
2332         spectrum.channel_count = cpu_to_le16(1);
2333         spectrum.flags =
2334             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2335         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2336         cmd.len = sizeof(spectrum);
2337         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2338
2339         if (iwl3945_is_associated(priv))
2340                 spectrum.start_time =
2341                     iwl3945_add_beacon_time(priv->last_beacon_time,
2342                                 add_time,
2343                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2344         else
2345                 spectrum.start_time = 0;
2346
2347         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2348         spectrum.channels[0].channel = params->channel;
2349         spectrum.channels[0].type = type;
2350         if (priv->active39_rxon.flags & RXON_FLG_BAND_24G_MSK)
2351                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2352                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2353
2354         rc = iwl_send_cmd_sync(priv, &cmd);
2355         if (rc)
2356                 return rc;
2357
2358         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
2359         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2360                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
2361                 rc = -EIO;
2362         }
2363
2364         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2365         switch (spectrum_resp_status) {
2366         case 0:         /* Command will be handled */
2367                 if (res->u.spectrum.id != 0xff) {
2368                         IWL_DEBUG_INFO("Replaced existing measurement: %d\n",
2369                                                 res->u.spectrum.id);
2370                         priv->measurement_status &= ~MEASUREMENT_READY;
2371                 }
2372                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2373                 rc = 0;
2374                 break;
2375
2376         case 1:         /* Command will not be handled */
2377                 rc = -EAGAIN;
2378                 break;
2379         }
2380
2381         dev_kfree_skb_any(cmd.meta.u.skb);
2382
2383         return rc;
2384 }
2385 #endif
2386
2387 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
2388                                struct iwl_rx_mem_buffer *rxb)
2389 {
2390         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2391         struct iwl_alive_resp *palive;
2392         struct delayed_work *pwork;
2393
2394         palive = &pkt->u.alive_frame;
2395
2396         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
2397                        "0x%01X 0x%01X\n",
2398                        palive->is_valid, palive->ver_type,
2399                        palive->ver_subtype);
2400
2401         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
2402                 IWL_DEBUG_INFO("Initialization Alive received.\n");
2403                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
2404                        sizeof(struct iwl_alive_resp));
2405                 pwork = &priv->init_alive_start;
2406         } else {
2407                 IWL_DEBUG_INFO("Runtime Alive received.\n");
2408                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
2409                        sizeof(struct iwl_alive_resp));
2410                 pwork = &priv->alive_start;
2411                 iwl3945_disable_events(priv);
2412         }
2413
2414         /* We delay the ALIVE response by 5ms to
2415          * give the HW RF Kill time to activate... */
2416         if (palive->is_valid == UCODE_VALID_OK)
2417                 queue_delayed_work(priv->workqueue, pwork,
2418                                    msecs_to_jiffies(5));
2419         else
2420                 IWL_WARN(priv, "uCode did not respond OK.\n");
2421 }
2422
2423 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
2424                                  struct iwl_rx_mem_buffer *rxb)
2425 {
2426 #ifdef CONFIG_IWLWIFI_DEBUG
2427         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2428 #endif
2429
2430         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
2431         return;
2432 }
2433
2434 static void iwl3945_rx_reply_error(struct iwl_priv *priv,
2435                                struct iwl_rx_mem_buffer *rxb)
2436 {
2437         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2438
2439         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2440                 "seq 0x%04X ser 0x%08X\n",
2441                 le32_to_cpu(pkt->u.err_resp.error_type),
2442                 get_cmd_string(pkt->u.err_resp.cmd_id),
2443                 pkt->u.err_resp.cmd_id,
2444                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2445                 le32_to_cpu(pkt->u.err_resp.error_info));
2446 }
2447
2448 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2449
2450 static void iwl3945_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
2451 {
2452         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2453         struct iwl3945_rxon_cmd *rxon = (void *)&priv->active39_rxon;
2454         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
2455         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
2456                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
2457         rxon->channel = csa->channel;
2458         priv->staging39_rxon.channel = csa->channel;
2459 }
2460
2461 static void iwl3945_rx_spectrum_measure_notif(struct iwl_priv *priv,
2462                                           struct iwl_rx_mem_buffer *rxb)
2463 {
2464 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
2465         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2466         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
2467
2468         if (!report->state) {
2469                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
2470                           "Spectrum Measure Notification: Start\n");
2471                 return;
2472         }
2473
2474         memcpy(&priv->measure_report, report, sizeof(*report));
2475         priv->measurement_status |= MEASUREMENT_READY;
2476 #endif
2477 }
2478
2479 static void iwl3945_rx_pm_sleep_notif(struct iwl_priv *priv,
2480                                   struct iwl_rx_mem_buffer *rxb)
2481 {
2482 #ifdef CONFIG_IWL3945_DEBUG
2483         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2484         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2485         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
2486                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2487 #endif
2488 }
2489
2490 static void iwl3945_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2491                                              struct iwl_rx_mem_buffer *rxb)
2492 {
2493         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2494         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
2495                         "notification for %s:\n",
2496                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2497         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw,
2498                            le32_to_cpu(pkt->len));
2499 }
2500
2501 static void iwl3945_bg_beacon_update(struct work_struct *work)
2502 {
2503         struct iwl_priv *priv =
2504                 container_of(work, struct iwl_priv, beacon_update);
2505         struct sk_buff *beacon;
2506
2507         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
2508         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
2509
2510         if (!beacon) {
2511                 IWL_ERR(priv, "update beacon failed\n");
2512                 return;
2513         }
2514
2515         mutex_lock(&priv->mutex);
2516         /* new beacon skb is allocated every time; dispose previous.*/
2517         if (priv->ibss_beacon)
2518                 dev_kfree_skb(priv->ibss_beacon);
2519
2520         priv->ibss_beacon = beacon;
2521         mutex_unlock(&priv->mutex);
2522
2523         iwl3945_send_beacon_cmd(priv);
2524 }
2525
2526 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
2527                                 struct iwl_rx_mem_buffer *rxb)
2528 {
2529 #ifdef CONFIG_IWL3945_DEBUG
2530         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2531         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
2532         u8 rate = beacon->beacon_notify_hdr.rate;
2533
2534         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
2535                 "tsf %d %d rate %d\n",
2536                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
2537                 beacon->beacon_notify_hdr.failure_frame,
2538                 le32_to_cpu(beacon->ibss_mgr_status),
2539                 le32_to_cpu(beacon->high_tsf),
2540                 le32_to_cpu(beacon->low_tsf), rate);
2541 #endif
2542
2543         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
2544             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
2545                 queue_work(priv->workqueue, &priv->beacon_update);
2546 }
2547
2548 /* Service response to REPLY_SCAN_CMD (0x80) */
2549 static void iwl3945_rx_reply_scan(struct iwl_priv *priv,
2550                               struct iwl_rx_mem_buffer *rxb)
2551 {
2552 #ifdef CONFIG_IWL3945_DEBUG
2553         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2554         struct iwl_scanreq_notification *notif =
2555             (struct iwl_scanreq_notification *)pkt->u.raw;
2556
2557         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
2558 #endif
2559 }
2560
2561 /* Service SCAN_START_NOTIFICATION (0x82) */
2562 static void iwl3945_rx_scan_start_notif(struct iwl_priv *priv,
2563                                     struct iwl_rx_mem_buffer *rxb)
2564 {
2565         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2566         struct iwl_scanstart_notification *notif =
2567             (struct iwl_scanstart_notification *)pkt->u.raw;
2568         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
2569         IWL_DEBUG_SCAN("Scan start: "
2570                        "%d [802.11%s] "
2571                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
2572                        notif->channel,
2573                        notif->band ? "bg" : "a",
2574                        notif->tsf_high,
2575                        notif->tsf_low, notif->status, notif->beacon_timer);
2576 }
2577
2578 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
2579 static void iwl3945_rx_scan_results_notif(struct iwl_priv *priv,
2580                                       struct iwl_rx_mem_buffer *rxb)
2581 {
2582 #ifdef CONFIG_IWLWIFI_DEBUG
2583         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2584         struct iwl_scanresults_notification *notif =
2585             (struct iwl_scanresults_notification *)pkt->u.raw;
2586 #endif
2587
2588         IWL_DEBUG_SCAN("Scan ch.res: "
2589                        "%d [802.11%s] "
2590                        "(TSF: 0x%08X:%08X) - %d "
2591                        "elapsed=%lu usec (%dms since last)\n",
2592                        notif->channel,
2593                        notif->band ? "bg" : "a",
2594                        le32_to_cpu(notif->tsf_high),
2595                        le32_to_cpu(notif->tsf_low),
2596                        le32_to_cpu(notif->statistics[0]),
2597                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
2598                        jiffies_to_msecs(elapsed_jiffies
2599                                         (priv->last_scan_jiffies, jiffies)));
2600
2601         priv->last_scan_jiffies = jiffies;
2602         priv->next_scan_jiffies = 0;
2603 }
2604
2605 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
2606 static void iwl3945_rx_scan_complete_notif(struct iwl_priv *priv,
2607                                        struct iwl_rx_mem_buffer *rxb)
2608 {
2609 #ifdef CONFIG_IWLWIFI_DEBUG
2610         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2611         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
2612 #endif
2613
2614         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
2615                        scan_notif->scanned_channels,
2616                        scan_notif->tsf_low,
2617                        scan_notif->tsf_high, scan_notif->status);
2618
2619         /* The HW is no longer scanning */
2620         clear_bit(STATUS_SCAN_HW, &priv->status);
2621
2622         /* The scan completion notification came in, so kill that timer... */
2623         cancel_delayed_work(&priv->scan_check);
2624
2625         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
2626                        (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) ?
2627                                                         "2.4" : "5.2",
2628                        jiffies_to_msecs(elapsed_jiffies
2629                                         (priv->scan_pass_start, jiffies)));
2630
2631         /* Remove this scanned band from the list of pending
2632          * bands to scan, band G precedes A in order of scanning
2633          * as seen in iwl3945_bg_request_scan */
2634         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ))
2635                 priv->scan_bands &= ~BIT(IEEE80211_BAND_2GHZ);
2636         else if (priv->scan_bands &  BIT(IEEE80211_BAND_5GHZ))
2637                 priv->scan_bands &= ~BIT(IEEE80211_BAND_5GHZ);
2638
2639         /* If a request to abort was given, or the scan did not succeed
2640          * then we reset the scan state machine and terminate,
2641          * re-queuing another scan if one has been requested */
2642         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2643                 IWL_DEBUG_INFO("Aborted scan completed.\n");
2644                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
2645         } else {
2646                 /* If there are more bands on this scan pass reschedule */
2647                 if (priv->scan_bands > 0)
2648                         goto reschedule;
2649         }
2650
2651         priv->last_scan_jiffies = jiffies;
2652         priv->next_scan_jiffies = 0;
2653         IWL_DEBUG_INFO("Setting scan to off\n");
2654
2655         clear_bit(STATUS_SCANNING, &priv->status);
2656
2657         IWL_DEBUG_INFO("Scan took %dms\n",
2658                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
2659
2660         queue_work(priv->workqueue, &priv->scan_completed);
2661
2662         return;
2663
2664 reschedule:
2665         priv->scan_pass_start = jiffies;
2666         queue_work(priv->workqueue, &priv->request_scan);
2667 }
2668
2669 /* Handle notification from uCode that card's power state is changing
2670  * due to software, hardware, or critical temperature RFKILL */
2671 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
2672                                     struct iwl_rx_mem_buffer *rxb)
2673 {
2674         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
2675         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
2676         unsigned long status = priv->status;
2677
2678         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
2679                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
2680                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
2681
2682         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2683                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2684
2685         if (flags & HW_CARD_DISABLED)
2686                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2687         else
2688                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2689
2690
2691         if (flags & SW_CARD_DISABLED)
2692                 set_bit(STATUS_RF_KILL_SW, &priv->status);
2693         else
2694                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2695
2696         iwl_scan_cancel(priv);
2697
2698         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
2699              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
2700             (test_bit(STATUS_RF_KILL_SW, &status) !=
2701              test_bit(STATUS_RF_KILL_SW, &priv->status)))
2702                 queue_work(priv->workqueue, &priv->rf_kill);
2703         else
2704                 wake_up_interruptible(&priv->wait_command_queue);
2705 }
2706
2707 /**
2708  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
2709  *
2710  * Setup the RX handlers for each of the reply types sent from the uCode
2711  * to the host.
2712  *
2713  * This function chains into the hardware specific files for them to setup
2714  * any hardware specific handlers as well.
2715  */
2716 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
2717 {
2718         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
2719         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
2720         priv->rx_handlers[REPLY_ERROR] = iwl3945_rx_reply_error;
2721         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl3945_rx_csa;
2722         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
2723             iwl3945_rx_spectrum_measure_notif;
2724         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl3945_rx_pm_sleep_notif;
2725         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
2726             iwl3945_rx_pm_debug_statistics_notif;
2727         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
2728
2729         /*
2730          * The same handler is used for both the REPLY to a discrete
2731          * statistics request from the host as well as for the periodic
2732          * statistics notifications (after received beacons) from the uCode.
2733          */
2734         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
2735         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
2736
2737         priv->rx_handlers[REPLY_SCAN_CMD] = iwl3945_rx_reply_scan;
2738         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl3945_rx_scan_start_notif;
2739         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
2740             iwl3945_rx_scan_results_notif;
2741         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
2742             iwl3945_rx_scan_complete_notif;
2743         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
2744
2745         /* Set up hardware specific Rx handlers */
2746         iwl3945_hw_rx_handler_setup(priv);
2747 }
2748
2749 /**
2750  * iwl3945_cmd_queue_reclaim - Reclaim CMD queue entries
2751  * When FW advances 'R' index, all entries between old and new 'R' index
2752  * need to be reclaimed.
2753  */
2754 static void iwl3945_cmd_queue_reclaim(struct iwl_priv *priv,
2755                                       int txq_id, int index)
2756 {
2757         struct iwl_tx_queue *txq = &priv->txq[txq_id];
2758         struct iwl_queue *q = &txq->q;
2759         int nfreed = 0;
2760
2761         if ((index >= q->n_bd) || (iwl_queue_used(q, index) == 0)) {
2762                 IWL_ERR(priv, "Read index for DMA queue txq id (%d), index %d, "
2763                           "is out of range [0-%d] %d %d.\n", txq_id,
2764                           index, q->n_bd, q->write_ptr, q->read_ptr);
2765                 return;
2766         }
2767
2768         for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
2769                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2770                 if (nfreed > 1) {
2771                         IWL_ERR(priv, "HCMD skipped: index (%d) %d %d\n", index,
2772                                         q->write_ptr, q->read_ptr);
2773                         queue_work(priv->workqueue, &priv->restart);
2774                         break;
2775                 }
2776                 nfreed++;
2777         }
2778 }
2779
2780
2781 /**
2782  * iwl3945_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
2783  * @rxb: Rx buffer to reclaim
2784  *
2785  * If an Rx buffer has an async callback associated with it the callback
2786  * will be executed.  The attached skb (if present) will only be freed
2787  * if the callback returns 1
2788  */
2789 static void iwl3945_tx_cmd_complete(struct iwl_priv *priv,
2790                                 struct iwl_rx_mem_buffer *rxb)
2791 {
2792         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2793         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
2794         int txq_id = SEQ_TO_QUEUE(sequence);
2795         int index = SEQ_TO_INDEX(sequence);
2796         int huge =  !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
2797         int cmd_index;
2798         struct iwl_cmd *cmd;
2799
2800         if (WARN(txq_id != IWL_CMD_QUEUE_NUM,
2801                  "wrong command queue %d, sequence 0x%X readp=%d writep=%d\n",
2802                   txq_id, sequence,
2803                   priv->txq[IWL_CMD_QUEUE_NUM].q.read_ptr,
2804                   priv->txq[IWL_CMD_QUEUE_NUM].q.write_ptr)) {
2805                 iwl_print_hex_dump(priv, IWL_DL_INFO , rxb, 32);
2806                 return;
2807         }
2808
2809         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
2810         cmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
2811
2812         /* Input error checking is done when commands are added to queue. */
2813         if (cmd->meta.flags & CMD_WANT_SKB) {
2814                 cmd->meta.source->u.skb = rxb->skb;
2815                 rxb->skb = NULL;
2816         } else if (cmd->meta.u.callback &&
2817                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
2818                 rxb->skb = NULL;
2819
2820         iwl3945_cmd_queue_reclaim(priv, txq_id, index);
2821
2822         if (!(cmd->meta.flags & CMD_ASYNC)) {
2823                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
2824                 wake_up_interruptible(&priv->wait_command_queue);
2825         }
2826 }
2827
2828 /************************** RX-FUNCTIONS ****************************/
2829 /*
2830  * Rx theory of operation
2831  *
2832  * The host allocates 32 DMA target addresses and passes the host address
2833  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
2834  * 0 to 31
2835  *
2836  * Rx Queue Indexes
2837  * The host/firmware share two index registers for managing the Rx buffers.
2838  *
2839  * The READ index maps to the first position that the firmware may be writing
2840  * to -- the driver can read up to (but not including) this position and get
2841  * good data.
2842  * The READ index is managed by the firmware once the card is enabled.
2843  *
2844  * The WRITE index maps to the last position the driver has read from -- the
2845  * position preceding WRITE is the last slot the firmware can place a packet.
2846  *
2847  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2848  * WRITE = READ.
2849  *
2850  * During initialization, the host sets up the READ queue position to the first
2851  * INDEX position, and WRITE to the last (READ - 1 wrapped)
2852  *
2853  * When the firmware places a packet in a buffer, it will advance the READ index
2854  * and fire the RX interrupt.  The driver can then query the READ index and
2855  * process as many packets as possible, moving the WRITE index forward as it
2856  * resets the Rx queue buffers with new memory.
2857  *
2858  * The management in the driver is as follows:
2859  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2860  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2861  *   to replenish the iwl->rxq->rx_free.
2862  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
2863  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
2864  *   'processed' and 'read' driver indexes as well)
2865  * + A received packet is processed and handed to the kernel network stack,
2866  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
2867  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2868  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2869  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
2870  *   were enough free buffers and RX_STALLED is set it is cleared.
2871  *
2872  *
2873  * Driver sequence:
2874  *
2875  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2876  *                            iwl3945_rx_queue_restock
2877  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
2878  *                            queue, updates firmware pointers, and updates
2879  *                            the WRITE index.  If insufficient rx_free buffers
2880  *                            are available, schedules iwl3945_rx_replenish
2881  *
2882  * -- enable interrupts --
2883  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
2884  *                            READ INDEX, detaching the SKB from the pool.
2885  *                            Moves the packet buffer from queue to rx_used.
2886  *                            Calls iwl3945_rx_queue_restock to refill any empty
2887  *                            slots.
2888  * ...
2889  *
2890  */
2891
2892 /**
2893  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
2894  */
2895 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
2896                                           dma_addr_t dma_addr)
2897 {
2898         return cpu_to_le32((u32)dma_addr);
2899 }
2900
2901 /**
2902  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
2903  *
2904  * If there are slots in the RX queue that need to be restocked,
2905  * and we have free pre-allocated buffers, fill the ranks as much
2906  * as we can, pulling from rx_free.
2907  *
2908  * This moves the 'write' index forward to catch up with 'processed', and
2909  * also updates the memory address in the firmware to reference the new
2910  * target buffer.
2911  */
2912 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
2913 {
2914         struct iwl_rx_queue *rxq = &priv->rxq;
2915         struct list_head *element;
2916         struct iwl_rx_mem_buffer *rxb;
2917         unsigned long flags;
2918         int write, rc;
2919
2920         spin_lock_irqsave(&rxq->lock, flags);
2921         write = rxq->write & ~0x7;
2922         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
2923                 /* Get next free Rx buffer, remove from free list */
2924                 element = rxq->rx_free.next;
2925                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
2926                 list_del(element);
2927
2928                 /* Point to Rx buffer via next RBD in circular buffer */
2929                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
2930                 rxq->queue[rxq->write] = rxb;
2931                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
2932                 rxq->free_count--;
2933         }
2934         spin_unlock_irqrestore(&rxq->lock, flags);
2935         /* If the pre-allocated buffer pool is dropping low, schedule to
2936          * refill it */
2937         if (rxq->free_count <= RX_LOW_WATERMARK)
2938                 queue_work(priv->workqueue, &priv->rx_replenish);
2939
2940
2941         /* If we've added more space for the firmware to place data, tell it.
2942          * Increment device's write pointer in multiples of 8. */
2943         if ((write != (rxq->write & ~0x7))
2944             || (abs(rxq->write - rxq->read) > 7)) {
2945                 spin_lock_irqsave(&rxq->lock, flags);
2946                 rxq->need_update = 1;
2947                 spin_unlock_irqrestore(&rxq->lock, flags);
2948                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
2949                 if (rc)
2950                         return rc;
2951         }
2952
2953         return 0;
2954 }
2955
2956 /**
2957  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
2958  *
2959  * When moving to rx_free an SKB is allocated for the slot.
2960  *
2961  * Also restock the Rx queue via iwl3945_rx_queue_restock.
2962  * This is called as a scheduled work item (except for during initialization)
2963  */
2964 static void iwl3945_rx_allocate(struct iwl_priv *priv)
2965 {
2966         struct iwl_rx_queue *rxq = &priv->rxq;
2967         struct list_head *element;
2968         struct iwl_rx_mem_buffer *rxb;
2969         unsigned long flags;
2970         spin_lock_irqsave(&rxq->lock, flags);
2971         while (!list_empty(&rxq->rx_used)) {
2972                 element = rxq->rx_used.next;
2973                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
2974
2975                 /* Alloc a new receive buffer */
2976                 rxb->skb =
2977                     alloc_skb(priv->hw_params.rx_buf_size,
2978                                 __GFP_NOWARN | GFP_ATOMIC);
2979                 if (!rxb->skb) {
2980                         if (net_ratelimit())
2981                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
2982                         /* We don't reschedule replenish work here -- we will
2983                          * call the restock method and if it still needs
2984                          * more buffers it will schedule replenish */
2985                         break;
2986                 }
2987
2988                 /* If radiotap head is required, reserve some headroom here.
2989                  * The physical head count is a variable rx_stats->phy_count.
2990                  * We reserve 4 bytes here. Plus these extra bytes, the
2991                  * headroom of the physical head should be enough for the
2992                  * radiotap head that iwl3945 supported. See iwl3945_rt.
2993                  */
2994                 skb_reserve(rxb->skb, 4);
2995
2996                 priv->alloc_rxb_skb++;
2997                 list_del(element);
2998
2999                 /* Get physical address of RB/SKB */
3000                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
3001                                                 rxb->skb->data,
3002                                                 priv->hw_params.rx_buf_size,
3003                                                 PCI_DMA_FROMDEVICE);
3004                 list_add_tail(&rxb->list, &rxq->rx_free);
3005                 rxq->free_count++;
3006         }
3007         spin_unlock_irqrestore(&rxq->lock, flags);
3008 }
3009
3010 /*
3011  * this should be called while priv->lock is locked
3012  */
3013 static void __iwl3945_rx_replenish(void *data)
3014 {
3015         struct iwl_priv *priv = data;
3016
3017         iwl3945_rx_allocate(priv);
3018         iwl3945_rx_queue_restock(priv);
3019 }
3020
3021
3022 void iwl3945_rx_replenish(void *data)
3023 {
3024         struct iwl_priv *priv = data;
3025         unsigned long flags;
3026
3027         iwl3945_rx_allocate(priv);
3028
3029         spin_lock_irqsave(&priv->lock, flags);
3030         iwl3945_rx_queue_restock(priv);
3031         spin_unlock_irqrestore(&priv->lock, flags);
3032 }
3033
3034 /* Convert linear signal-to-noise ratio into dB */
3035 static u8 ratio2dB[100] = {
3036 /*       0   1   2   3   4   5   6   7   8   9 */
3037          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3038         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3039         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3040         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3041         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3042         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3043         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3044         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3045         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3046         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3047 };
3048
3049 /* Calculates a relative dB value from a ratio of linear
3050  *   (i.e. not dB) signal levels.
3051  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
3052 int iwl3945_calc_db_from_ratio(int sig_ratio)
3053 {
3054         /* 1000:1 or higher just report as 60 dB */
3055         if (sig_ratio >= 1000)
3056                 return 60;
3057
3058         /* 100:1 or higher, divide by 10 and use table,
3059          *   add 20 dB to make up for divide by 10 */
3060         if (sig_ratio >= 100)
3061                 return 20 + (int)ratio2dB[sig_ratio/10];
3062
3063         /* We shouldn't see this */
3064         if (sig_ratio < 1)
3065                 return 0;
3066
3067         /* Use table for ratios 1:1 - 99:1 */
3068         return (int)ratio2dB[sig_ratio];
3069 }
3070
3071 #define PERFECT_RSSI (-20) /* dBm */
3072 #define WORST_RSSI (-95)   /* dBm */
3073 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
3074
3075 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
3076  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
3077  *   about formulas used below. */
3078 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
3079 {
3080         int sig_qual;
3081         int degradation = PERFECT_RSSI - rssi_dbm;
3082
3083         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
3084          * as indicator; formula is (signal dbm - noise dbm).
3085          * SNR at or above 40 is a great signal (100%).
3086          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
3087          * Weakest usable signal is usually 10 - 15 dB SNR. */
3088         if (noise_dbm) {
3089                 if (rssi_dbm - noise_dbm >= 40)
3090                         return 100;
3091                 else if (rssi_dbm < noise_dbm)
3092                         return 0;
3093                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
3094
3095         /* Else use just the signal level.
3096          * This formula is a least squares fit of data points collected and
3097          *   compared with a reference system that had a percentage (%) display
3098          *   for signal quality. */
3099         } else
3100                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
3101                             (15 * RSSI_RANGE + 62 * degradation)) /
3102                            (RSSI_RANGE * RSSI_RANGE);
3103
3104         if (sig_qual > 100)
3105                 sig_qual = 100;
3106         else if (sig_qual < 1)
3107                 sig_qual = 0;
3108
3109         return sig_qual;
3110 }
3111
3112 /**
3113  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
3114  *
3115  * Uses the priv->rx_handlers callback function array to invoke
3116  * the appropriate handlers, including command responses,
3117  * frame-received notifications, and other notifications.
3118  */
3119 static void iwl3945_rx_handle(struct iwl_priv *priv)
3120 {
3121         struct iwl_rx_mem_buffer *rxb;
3122         struct iwl_rx_packet *pkt;
3123         struct iwl_rx_queue *rxq = &priv->rxq;
3124         u32 r, i;
3125         int reclaim;
3126         unsigned long flags;
3127         u8 fill_rx = 0;
3128         u32 count = 8;
3129
3130         /* uCode's read index (stored in shared DRAM) indicates the last Rx
3131          * buffer that the driver may process (last buffer filled by ucode). */
3132         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
3133         i = rxq->read;
3134
3135         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
3136                 fill_rx = 1;
3137         /* Rx interrupt, but nothing sent from uCode */
3138         if (i == r)
3139                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
3140
3141         while (i != r) {
3142                 rxb = rxq->queue[i];
3143
3144                 /* If an RXB doesn't have a Rx queue slot associated with it,
3145                  * then a bug has been introduced in the queue refilling
3146                  * routines -- catch it here */
3147                 BUG_ON(rxb == NULL);
3148
3149                 rxq->queue[i] = NULL;
3150
3151                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->real_dma_addr,
3152                                             priv->hw_params.rx_buf_size,
3153                                             PCI_DMA_FROMDEVICE);
3154                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
3155
3156                 /* Reclaim a command buffer only if this packet is a response
3157                  *   to a (driver-originated) command.
3158                  * If the packet (e.g. Rx frame) originated from uCode,
3159                  *   there is no command buffer to reclaim.
3160                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
3161                  *   but apparently a few don't get set; catch them here. */
3162                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
3163                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
3164                         (pkt->hdr.cmd != REPLY_TX);
3165
3166                 /* Based on type of command response or notification,
3167                  *   handle those that need handling via function in
3168                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
3169                 if (priv->rx_handlers[pkt->hdr.cmd]) {
3170                         IWL_DEBUG(IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
3171                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
3172                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
3173                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
3174                 } else {
3175                         /* No handling needed */
3176                         IWL_DEBUG(IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
3177                                 "r %d i %d No handler needed for %s, 0x%02x\n",
3178                                 r, i, get_cmd_string(pkt->hdr.cmd),
3179                                 pkt->hdr.cmd);
3180                 }
3181
3182                 if (reclaim) {
3183                         /* Invoke any callbacks, transfer the skb to caller, and
3184                          * fire off the (possibly) blocking iwl_send_cmd()
3185                          * as we reclaim the driver command queue */
3186                         if (rxb && rxb->skb)
3187                                 iwl3945_tx_cmd_complete(priv, rxb);
3188                         else
3189                                 IWL_WARN(priv, "Claim null rxb?\n");
3190                 }
3191
3192                 /* For now we just don't re-use anything.  We can tweak this
3193                  * later to try and re-use notification packets and SKBs that
3194                  * fail to Rx correctly */
3195                 if (rxb->skb != NULL) {
3196                         priv->alloc_rxb_skb--;
3197                         dev_kfree_skb_any(rxb->skb);
3198                         rxb->skb = NULL;
3199                 }
3200
3201                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
3202                                 priv->hw_params.rx_buf_size,
3203                                 PCI_DMA_FROMDEVICE);
3204                 spin_lock_irqsave(&rxq->lock, flags);
3205                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
3206                 spin_unlock_irqrestore(&rxq->lock, flags);
3207                 i = (i + 1) & RX_QUEUE_MASK;
3208                 /* If there are a lot of unused frames,
3209                  * restock the Rx queue so ucode won't assert. */
3210                 if (fill_rx) {
3211                         count++;
3212                         if (count >= 8) {
3213                                 priv->rxq.read = i;
3214                                 __iwl3945_rx_replenish(priv);
3215                                 count = 0;
3216                         }
3217                 }
3218         }
3219
3220         /* Backtrack one entry */
3221         priv->rxq.read = i;
3222         iwl3945_rx_queue_restock(priv);
3223 }
3224
3225 #ifdef CONFIG_IWL3945_DEBUG
3226 static void iwl3945_print_rx_config_cmd(struct iwl_priv *priv,
3227                                         struct iwl3945_rxon_cmd *rxon)
3228 {
3229         IWL_DEBUG_RADIO("RX CONFIG:\n");
3230         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
3231         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
3232         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
3233         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
3234                         le32_to_cpu(rxon->filter_flags));
3235         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
3236         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
3237                         rxon->ofdm_basic_rates);
3238         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
3239         IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
3240         IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
3241         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
3242 }
3243 #endif
3244
3245 static void iwl3945_enable_interrupts(struct iwl_priv *priv)
3246 {
3247         IWL_DEBUG_ISR("Enabling interrupts\n");
3248         set_bit(STATUS_INT_ENABLED, &priv->status);
3249         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
3250 }
3251
3252
3253 /* call this function to flush any scheduled tasklet */
3254 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
3255 {
3256         /* wait to make sure we flush pending tasklet*/
3257         synchronize_irq(priv->pci_dev->irq);
3258         tasklet_kill(&priv->irq_tasklet);
3259 }
3260
3261
3262 static inline void iwl3945_disable_interrupts(struct iwl_priv *priv)
3263 {
3264         clear_bit(STATUS_INT_ENABLED, &priv->status);
3265
3266         /* disable interrupts from uCode/NIC to host */
3267         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3268
3269         /* acknowledge/clear/reset any interrupts still pending
3270          * from uCode or flow handler (Rx/Tx DMA) */
3271         iwl_write32(priv, CSR_INT, 0xffffffff);
3272         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
3273         IWL_DEBUG_ISR("Disabled interrupts\n");
3274 }
3275
3276 static const char *desc_lookup(int i)
3277 {
3278         switch (i) {
3279         case 1:
3280                 return "FAIL";
3281         case 2:
3282                 return "BAD_PARAM";
3283         case 3:
3284                 return "BAD_CHECKSUM";
3285         case 4:
3286                 return "NMI_INTERRUPT";
3287         case 5:
3288                 return "SYSASSERT";
3289         case 6:
3290                 return "FATAL_ERROR";
3291         }
3292
3293         return "UNKNOWN";
3294 }
3295
3296 #define ERROR_START_OFFSET  (1 * sizeof(u32))
3297 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
3298
3299 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
3300 {
3301         u32 i;
3302         u32 desc, time, count, base, data1;
3303         u32 blink1, blink2, ilink1, ilink2;
3304         int rc;
3305
3306         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
3307
3308         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
3309                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
3310                 return;
3311         }
3312
3313         rc = iwl_grab_nic_access(priv);
3314         if (rc) {
3315                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
3316                 return;
3317         }
3318
3319         count = iwl_read_targ_mem(priv, base);
3320
3321         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
3322                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
3323                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
3324                         priv->status, count);
3325         }
3326
3327         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
3328                   "ilink1  nmiPC   Line\n");
3329         for (i = ERROR_START_OFFSET;
3330              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
3331              i += ERROR_ELEM_SIZE) {
3332                 desc = iwl_read_targ_mem(priv, base + i);
3333                 time =
3334                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
3335                 blink1 =
3336                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
3337                 blink2 =
3338                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
3339                 ilink1 =
3340                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
3341                 ilink2 =
3342                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
3343                 data1 =
3344                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
3345
3346                 IWL_ERR(priv,
3347                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
3348                         desc_lookup(desc), desc, time, blink1, blink2,
3349                         ilink1, ilink2, data1);
3350         }
3351
3352         iwl_release_nic_access(priv);
3353
3354 }
3355
3356 #define EVENT_START_OFFSET  (6 * sizeof(u32))
3357
3358 /**
3359  * iwl3945_print_event_log - Dump error event log to syslog
3360  *
3361  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
3362  */
3363 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
3364                                 u32 num_events, u32 mode)
3365 {
3366         u32 i;
3367         u32 base;       /* SRAM byte address of event log header */
3368         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
3369         u32 ptr;        /* SRAM byte address of log data */
3370         u32 ev, time, data; /* event log data */
3371
3372         if (num_events == 0)
3373                 return;
3374
3375         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3376
3377         if (mode == 0)
3378                 event_size = 2 * sizeof(u32);
3379         else
3380                 event_size = 3 * sizeof(u32);
3381
3382         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
3383
3384         /* "time" is actually "data" for mode 0 (no timestamp).
3385          * place event id # at far right for easier visual parsing. */
3386         for (i = 0; i < num_events; i++) {
3387                 ev = iwl_read_targ_mem(priv, ptr);
3388                 ptr += sizeof(u32);
3389                 time = iwl_read_targ_mem(priv, ptr);
3390                 ptr += sizeof(u32);
3391                 if (mode == 0) {
3392                         /* data, ev */
3393                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
3394                 } else {
3395                         data = iwl_read_targ_mem(priv, ptr);
3396                         ptr += sizeof(u32);
3397                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
3398                 }
3399         }
3400 }
3401
3402 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
3403 {
3404         int rc;
3405         u32 base;       /* SRAM byte address of event log header */
3406         u32 capacity;   /* event log capacity in # entries */
3407         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
3408         u32 num_wraps;  /* # times uCode wrapped to top of log */
3409         u32 next_entry; /* index of next entry to be written by uCode */
3410         u32 size;       /* # entries that we'll print */
3411
3412         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
3413         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
3414                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
3415                 return;
3416         }
3417
3418         rc = iwl_grab_nic_access(priv);
3419         if (rc) {
3420                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
3421                 return;
3422         }
3423
3424         /* event log header */
3425         capacity = iwl_read_targ_mem(priv, base);
3426         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
3427         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
3428         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
3429
3430         size = num_wraps ? capacity : next_entry;
3431
3432         /* bail out if nothing in log */
3433         if (size == 0) {
3434                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
3435                 iwl_release_nic_access(priv);
3436                 return;
3437         }
3438
3439         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
3440                   size, num_wraps);
3441
3442         /* if uCode has wrapped back to top of log, start at the oldest entry,
3443          * i.e the next one that uCode would fill. */
3444         if (num_wraps)
3445                 iwl3945_print_event_log(priv, next_entry,
3446                                     capacity - next_entry, mode);
3447
3448         /* (then/else) start at top of log */
3449         iwl3945_print_event_log(priv, 0, next_entry, mode);
3450
3451         iwl_release_nic_access(priv);
3452 }
3453
3454 /**
3455  * iwl3945_irq_handle_error - called for HW or SW error interrupt from card
3456  */
3457 static void iwl3945_irq_handle_error(struct iwl_priv *priv)
3458 {
3459         /* Set the FW error flag -- cleared on iwl3945_down */
3460         set_bit(STATUS_FW_ERROR, &priv->status);
3461
3462         /* Cancel currently queued command. */
3463         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3464
3465 #ifdef CONFIG_IWL3945_DEBUG
3466         if (priv->debug_level & IWL_DL_FW_ERRORS) {
3467                 iwl3945_dump_nic_error_log(priv);
3468                 iwl3945_dump_nic_event_log(priv);
3469                 iwl3945_print_rx_config_cmd(priv, &priv->staging39_rxon);
3470         }
3471 #endif
3472
3473         wake_up_interruptible(&priv->wait_command_queue);
3474
3475         /* Keep the restart process from trying to send host
3476          * commands by clearing the INIT status bit */
3477         clear_bit(STATUS_READY, &priv->status);
3478
3479         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3480                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
3481                           "Restarting adapter due to uCode error.\n");
3482
3483                 if (iwl3945_is_associated(priv)) {
3484                         memcpy(&priv->recovery39_rxon, &priv->active39_rxon,
3485                                sizeof(priv->recovery39_rxon));
3486                         priv->error_recovering = 1;
3487                 }
3488                 queue_work(priv->workqueue, &priv->restart);
3489         }
3490 }
3491
3492 static void iwl3945_error_recovery(struct iwl_priv *priv)
3493 {
3494         unsigned long flags;
3495
3496         memcpy(&priv->staging39_rxon, &priv->recovery39_rxon,
3497                sizeof(priv->staging39_rxon));
3498         priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3499         iwl3945_commit_rxon(priv);
3500
3501         iwl3945_add_station(priv, priv->bssid, 1, 0);
3502
3503         spin_lock_irqsave(&priv->lock, flags);
3504         priv->assoc_id = le16_to_cpu(priv->staging39_rxon.assoc_id);
3505         priv->error_recovering = 0;
3506         spin_unlock_irqrestore(&priv->lock, flags);
3507 }
3508
3509 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
3510 {
3511         u32 inta, handled = 0;
3512         u32 inta_fh;
3513         unsigned long flags;
3514 #ifdef CONFIG_IWL3945_DEBUG
3515         u32 inta_mask;
3516 #endif
3517
3518         spin_lock_irqsave(&priv->lock, flags);
3519
3520         /* Ack/clear/reset pending uCode interrupts.
3521          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
3522          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
3523         inta = iwl_read32(priv, CSR_INT);
3524         iwl_write32(priv, CSR_INT, inta);
3525
3526         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
3527          * Any new interrupts that happen after this, either while we're
3528          * in this tasklet, or later, will show up in next ISR/tasklet. */
3529         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3530         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
3531
3532 #ifdef CONFIG_IWL3945_DEBUG
3533         if (priv->debug_level & IWL_DL_ISR) {
3534                 /* just for debug */
3535                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3536                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3537                               inta, inta_mask, inta_fh);
3538         }
3539 #endif
3540
3541         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
3542          * atomic, make sure that inta covers all the interrupts that
3543          * we've discovered, even if FH interrupt came in just after
3544          * reading CSR_INT. */
3545         if (inta_fh & CSR39_FH_INT_RX_MASK)
3546                 inta |= CSR_INT_BIT_FH_RX;
3547         if (inta_fh & CSR39_FH_INT_TX_MASK)
3548                 inta |= CSR_INT_BIT_FH_TX;
3549
3550         /* Now service all interrupt bits discovered above. */
3551         if (inta & CSR_INT_BIT_HW_ERR) {
3552                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
3553
3554                 /* Tell the device to stop sending interrupts */
3555                 iwl3945_disable_interrupts(priv);
3556
3557                 iwl3945_irq_handle_error(priv);
3558
3559                 handled |= CSR_INT_BIT_HW_ERR;
3560
3561                 spin_unlock_irqrestore(&priv->lock, flags);
3562
3563                 return;
3564         }
3565
3566 #ifdef CONFIG_IWL3945_DEBUG
3567         if (priv->debug_level & (IWL_DL_ISR)) {
3568                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
3569                 if (inta & CSR_INT_BIT_SCD)
3570                         IWL_DEBUG_ISR("Scheduler finished to transmit "
3571                                       "the frame/frames.\n");
3572
3573                 /* Alive notification via Rx interrupt will do the real work */
3574                 if (inta & CSR_INT_BIT_ALIVE)
3575                         IWL_DEBUG_ISR("Alive interrupt\n");
3576         }
3577 #endif
3578         /* Safely ignore these bits for debug checks below */
3579         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
3580
3581         /* Error detected by uCode */
3582         if (inta & CSR_INT_BIT_SW_ERR) {
3583                 IWL_ERR(priv, "Microcode SW error detected. "
3584                         "Restarting 0x%X.\n", inta);
3585                 iwl3945_irq_handle_error(priv);
3586                 handled |= CSR_INT_BIT_SW_ERR;
3587         }
3588
3589         /* uCode wakes up after power-down sleep */
3590         if (inta & CSR_INT_BIT_WAKEUP) {
3591                 IWL_DEBUG_ISR("Wakeup interrupt\n");
3592                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
3593                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
3594                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
3595                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
3596                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
3597                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
3598                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
3599
3600                 handled |= CSR_INT_BIT_WAKEUP;
3601         }
3602
3603         /* All uCode command responses, including Tx command responses,
3604          * Rx "responses" (frame-received notification), and other
3605          * notifications from uCode come through here*/
3606         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
3607                 iwl3945_rx_handle(priv);
3608                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
3609         }
3610
3611         if (inta & CSR_INT_BIT_FH_TX) {
3612                 IWL_DEBUG_ISR("Tx interrupt\n");
3613
3614                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
3615                 if (!iwl_grab_nic_access(priv)) {
3616                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
3617                                              (FH39_SRVC_CHNL), 0x0);
3618                         iwl_release_nic_access(priv);
3619                 }
3620                 handled |= CSR_INT_BIT_FH_TX;
3621         }
3622
3623         if (inta & ~handled)
3624                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
3625
3626         if (inta & ~CSR_INI_SET_MASK) {
3627                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
3628                          inta & ~CSR_INI_SET_MASK);
3629                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
3630         }
3631
3632         /* Re-enable all interrupts */
3633         /* only Re-enable if disabled by irq */
3634         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3635                 iwl3945_enable_interrupts(priv);
3636
3637 #ifdef CONFIG_IWL3945_DEBUG
3638         if (priv->debug_level & (IWL_DL_ISR)) {
3639                 inta = iwl_read32(priv, CSR_INT);
3640                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
3641                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3642                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
3643                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
3644         }
3645 #endif
3646         spin_unlock_irqrestore(&priv->lock, flags);
3647 }
3648
3649 static irqreturn_t iwl3945_isr(int irq, void *data)
3650 {
3651         struct iwl_priv *priv = data;
3652         u32 inta, inta_mask;
3653         u32 inta_fh;
3654         if (!priv)
3655                 return IRQ_NONE;
3656
3657         spin_lock(&priv->lock);
3658
3659         /* Disable (but don't clear!) interrupts here to avoid
3660          *    back-to-back ISRs and sporadic interrupts from our NIC.
3661          * If we have something to service, the tasklet will re-enable ints.
3662          * If we *don't* have something, we'll re-enable before leaving here. */
3663         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
3664         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
3665
3666         /* Discover which interrupts are active/pending */
3667         inta = iwl_read32(priv, CSR_INT);
3668         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
3669
3670         /* Ignore interrupt if there's nothing in NIC to service.
3671          * This may be due to IRQ shared with another device,
3672          * or due to sporadic interrupts thrown from our NIC. */
3673         if (!inta && !inta_fh) {
3674                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
3675                 goto none;
3676         }
3677
3678         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
3679                 /* Hardware disappeared */
3680                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
3681                 goto unplugged;
3682         }
3683
3684         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
3685                       inta, inta_mask, inta_fh);
3686
3687         inta &= ~CSR_INT_BIT_SCD;
3688
3689         /* iwl3945_irq_tasklet() will service interrupts and re-enable them */
3690         if (likely(inta || inta_fh))
3691                 tasklet_schedule(&priv->irq_tasklet);
3692 unplugged:
3693         spin_unlock(&priv->lock);
3694
3695         return IRQ_HANDLED;
3696
3697  none:
3698         /* re-enable interrupts here since we don't have anything to service. */
3699         /* only Re-enable if disabled by irq */
3700         if (test_bit(STATUS_INT_ENABLED, &priv->status))
3701                 iwl3945_enable_interrupts(priv);
3702         spin_unlock(&priv->lock);
3703         return IRQ_NONE;
3704 }
3705
3706 /************************** EEPROM BANDS ****************************
3707  *
3708  * The iwl3945_eeprom_band definitions below provide the mapping from the
3709  * EEPROM contents to the specific channel number supported for each
3710  * band.
3711  *
3712  * For example, iwl3945_priv->eeprom39.band_3_channels[4] from the band_3
3713  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
3714  * The specific geography and calibration information for that channel
3715  * is contained in the eeprom map itself.
3716  *
3717  * During init, we copy the eeprom information and channel map
3718  * information into priv->channel_info_24/52 and priv->channel_map_24/52
3719  *
3720  * channel_map_24/52 provides the index in the channel_info array for a
3721  * given channel.  We have to have two separate maps as there is channel
3722  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
3723  * band_2
3724  *
3725  * A value of 0xff stored in the channel_map indicates that the channel
3726  * is not supported by the hardware at all.
3727  *
3728  * A value of 0xfe in the channel_map indicates that the channel is not
3729  * valid for Tx with the current hardware.  This means that
3730  * while the system can tune and receive on a given channel, it may not
3731  * be able to associate or transmit any frames on that
3732  * channel.  There is no corresponding channel information for that
3733  * entry.
3734  *
3735  *********************************************************************/
3736
3737 /* 2.4 GHz */
3738 static const u8 iwl3945_eeprom_band_1[14] = {
3739         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
3740 };
3741
3742 /* 5.2 GHz bands */
3743 static const u8 iwl3945_eeprom_band_2[] = {     /* 4915-5080MHz */
3744         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
3745 };
3746
3747 static const u8 iwl3945_eeprom_band_3[] = {     /* 5170-5320MHz */
3748         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
3749 };
3750
3751 static const u8 iwl3945_eeprom_band_4[] = {     /* 5500-5700MHz */
3752         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
3753 };
3754
3755 static const u8 iwl3945_eeprom_band_5[] = {     /* 5725-5825MHz */
3756         145, 149, 153, 157, 161, 165
3757 };
3758
3759 static void iwl3945_init_band_reference(const struct iwl_priv *priv, int band,
3760                                     int *eeprom_ch_count,
3761                                     const struct iwl_eeprom_channel
3762                                     **eeprom_ch_info,
3763                                     const u8 **eeprom_ch_index)
3764 {
3765         switch (band) {
3766         case 1:         /* 2.4GHz band */
3767                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_1);
3768                 *eeprom_ch_info = priv->eeprom39.band_1_channels;
3769                 *eeprom_ch_index = iwl3945_eeprom_band_1;
3770                 break;
3771         case 2:         /* 4.9GHz band */
3772                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
3773                 *eeprom_ch_info = priv->eeprom39.band_2_channels;
3774                 *eeprom_ch_index = iwl3945_eeprom_band_2;
3775                 break;
3776         case 3:         /* 5.2GHz band */
3777                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_3);
3778                 *eeprom_ch_info = priv->eeprom39.band_3_channels;
3779                 *eeprom_ch_index = iwl3945_eeprom_band_3;
3780                 break;
3781         case 4:         /* 5.5GHz band */
3782                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
3783                 *eeprom_ch_info = priv->eeprom39.band_4_channels;
3784                 *eeprom_ch_index = iwl3945_eeprom_band_4;
3785                 break;
3786         case 5:         /* 5.7GHz band */
3787                 *eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
3788                 *eeprom_ch_info = priv->eeprom39.band_5_channels;
3789                 *eeprom_ch_index = iwl3945_eeprom_band_5;
3790                 break;
3791         default:
3792                 BUG();
3793                 return;
3794         }
3795 }
3796
3797 /**
3798  * iwl3945_get_channel_info - Find driver's private channel info
3799  *
3800  * Based on band and channel number.
3801  */
3802 const struct iwl_channel_info *
3803 iwl3945_get_channel_info(const struct iwl_priv *priv,
3804                          enum ieee80211_band band, u16 channel)
3805 {
3806         int i;
3807
3808         switch (band) {
3809         case IEEE80211_BAND_5GHZ:
3810                 for (i = 14; i < priv->channel_count; i++) {
3811                         if (priv->channel_info[i].channel == channel)
3812                                 return &priv->channel_info[i];
3813                 }
3814                 break;
3815
3816         case IEEE80211_BAND_2GHZ:
3817                 if (channel >= 1 && channel <= 14)
3818                         return &priv->channel_info[channel - 1];
3819                 break;
3820         case IEEE80211_NUM_BANDS:
3821                 WARN_ON(1);
3822         }
3823
3824         return NULL;
3825 }
3826
3827 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
3828                             ? # x " " : "")
3829
3830 /**
3831  * iwl3945_init_channel_map - Set up driver's info for all possible channels
3832  */
3833 static int iwl3945_init_channel_map(struct iwl_priv *priv)
3834 {
3835         int eeprom_ch_count = 0;
3836         const u8 *eeprom_ch_index = NULL;
3837         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
3838         int band, ch;
3839         struct iwl_channel_info *ch_info;
3840
3841         if (priv->channel_count) {
3842                 IWL_DEBUG_INFO("Channel map already initialized.\n");
3843                 return 0;
3844         }
3845
3846         if (priv->eeprom39.version < 0x2f) {
3847                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3848                             priv->eeprom39.version);
3849                 return -EINVAL;
3850         }
3851
3852         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
3853
3854         priv->channel_count =
3855             ARRAY_SIZE(iwl3945_eeprom_band_1) +
3856             ARRAY_SIZE(iwl3945_eeprom_band_2) +
3857             ARRAY_SIZE(iwl3945_eeprom_band_3) +
3858             ARRAY_SIZE(iwl3945_eeprom_band_4) +
3859             ARRAY_SIZE(iwl3945_eeprom_band_5);
3860
3861         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
3862
3863         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
3864                                      priv->channel_count, GFP_KERNEL);
3865         if (!priv->channel_info) {
3866                 IWL_ERR(priv, "Could not allocate channel_info\n");
3867                 priv->channel_count = 0;
3868                 return -ENOMEM;
3869         }
3870
3871         ch_info = priv->channel_info;
3872
3873         /* Loop through the 5 EEPROM bands adding them in order to the
3874          * channel map we maintain (that contains additional information than
3875          * what just in the EEPROM) */
3876         for (band = 1; band <= 5; band++) {
3877
3878                 iwl3945_init_band_reference(priv, band, &eeprom_ch_count,
3879                                         &eeprom_ch_info, &eeprom_ch_index);
3880
3881                 /* Loop through each band adding each of the channels */
3882                 for (ch = 0; ch < eeprom_ch_count; ch++) {
3883                         ch_info->channel = eeprom_ch_index[ch];
3884                         ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
3885                             IEEE80211_BAND_5GHZ;
3886
3887                         /* permanently store EEPROM's channel regulatory flags
3888                          *   and max power in channel info database. */
3889                         ch_info->eeprom = eeprom_ch_info[ch];
3890
3891                         /* Copy the run-time flags so they are there even on
3892                          * invalid channels */
3893                         ch_info->flags = eeprom_ch_info[ch].flags;
3894
3895                         if (!(is_channel_valid(ch_info))) {
3896                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
3897                                                "No traffic\n",
3898                                                ch_info->channel,
3899                                                ch_info->flags,
3900                                                is_channel_a_band(ch_info) ?
3901                                                "5.2" : "2.4");
3902                                 ch_info++;
3903                                 continue;
3904                         }
3905
3906                         /* Initialize regulatory-based run-time data */
3907                         ch_info->max_power_avg = ch_info->curr_txpow =
3908                             eeprom_ch_info[ch].max_power_avg;
3909                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
3910                         ch_info->min_power = 0;
3911
3912                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
3913                                        " %ddBm): Ad-Hoc %ssupported\n",
3914                                        ch_info->channel,
3915                                        is_channel_a_band(ch_info) ?
3916                                        "5.2" : "2.4",
3917                                        CHECK_AND_PRINT(VALID),
3918                                        CHECK_AND_PRINT(IBSS),
3919                                        CHECK_AND_PRINT(ACTIVE),
3920                                        CHECK_AND_PRINT(RADAR),
3921                                        CHECK_AND_PRINT(WIDE),
3922                                        CHECK_AND_PRINT(DFS),
3923                                        eeprom_ch_info[ch].flags,
3924                                        eeprom_ch_info[ch].max_power_avg,
3925                                        ((eeprom_ch_info[ch].
3926                                          flags & EEPROM_CHANNEL_IBSS)
3927                                         && !(eeprom_ch_info[ch].
3928                                              flags & EEPROM_CHANNEL_RADAR))
3929                                        ? "" : "not ");
3930
3931                         /* Set the tx_power_user_lmt to the highest power
3932                          * supported by any channel */
3933                         if (eeprom_ch_info[ch].max_power_avg >
3934                             priv->tx_power_user_lmt)
3935                                 priv->tx_power_user_lmt =
3936                                     eeprom_ch_info[ch].max_power_avg;
3937
3938                         ch_info++;
3939                 }
3940         }
3941
3942         /* Set up txpower settings in driver for all channels */
3943         if (iwl3945_txpower_set_from_eeprom(priv))
3944                 return -EIO;
3945
3946         return 0;
3947 }
3948
3949 /*
3950  * iwl3945_free_channel_map - undo allocations in iwl3945_init_channel_map
3951  */
3952 static void iwl3945_free_channel_map(struct iwl_priv *priv)
3953 {
3954         kfree(priv->channel_info);
3955         priv->channel_count = 0;
3956 }
3957
3958 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
3959  * sending probe req.  This should be set long enough to hear probe responses
3960  * from more than one AP.  */
3961 #define IWL_ACTIVE_DWELL_TIME_24    (30)        /* all times in msec */
3962 #define IWL_ACTIVE_DWELL_TIME_52    (20)
3963
3964 #define IWL_ACTIVE_DWELL_FACTOR_24GHZ (3)
3965 #define IWL_ACTIVE_DWELL_FACTOR_52GHZ (2)
3966
3967 /* For faster active scanning, scan will move to the next channel if fewer than
3968  * PLCP_QUIET_THRESH packets are heard on this channel within
3969  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
3970  * time if it's a quiet channel (nothing responded to our probe, and there's
3971  * no other traffic).
3972  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
3973 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
3974 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(10)  /* msec */
3975
3976 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
3977  * Must be set longer than active dwell time.
3978  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
3979 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
3980 #define IWL_PASSIVE_DWELL_TIME_52   (10)
3981 #define IWL_PASSIVE_DWELL_BASE      (100)
3982 #define IWL_CHANNEL_TUNE_TIME       5
3983
3984 #define IWL_SCAN_PROBE_MASK(n)   (BIT(n) | (BIT(n) - BIT(1)))
3985
3986 static inline u16 iwl3945_get_active_dwell_time(struct iwl_priv *priv,
3987                                                 enum ieee80211_band band,
3988                                                 u8 n_probes)
3989 {
3990         if (band == IEEE80211_BAND_5GHZ)
3991                 return IWL_ACTIVE_DWELL_TIME_52 +
3992                         IWL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
3993         else
3994                 return IWL_ACTIVE_DWELL_TIME_24 +
3995                         IWL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
3996 }
3997
3998 static u16 iwl3945_get_passive_dwell_time(struct iwl_priv *priv,
3999                                           enum ieee80211_band band)
4000 {
4001         u16 passive = (band == IEEE80211_BAND_2GHZ) ?
4002             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4003             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4004
4005         if (iwl3945_is_associated(priv)) {
4006                 /* If we're associated, we clamp the maximum passive
4007                  * dwell time to be 98% of the beacon interval (minus
4008                  * 2 * channel tune time) */
4009                 passive = priv->beacon_int;
4010                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4011                         passive = IWL_PASSIVE_DWELL_BASE;
4012                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4013         }
4014
4015         return passive;
4016 }
4017
4018 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
4019                                          enum ieee80211_band band,
4020                                      u8 is_active, u8 n_probes,
4021                                      struct iwl3945_scan_channel *scan_ch)
4022 {
4023         const struct ieee80211_channel *channels = NULL;
4024         const struct ieee80211_supported_band *sband;
4025         const struct iwl_channel_info *ch_info;
4026         u16 passive_dwell = 0;
4027         u16 active_dwell = 0;
4028         int added, i;
4029
4030         sband = iwl_get_hw_mode(priv, band);
4031         if (!sband)
4032                 return 0;
4033
4034         channels = sband->channels;
4035
4036         active_dwell = iwl3945_get_active_dwell_time(priv, band, n_probes);
4037         passive_dwell = iwl3945_get_passive_dwell_time(priv, band);
4038
4039         if (passive_dwell <= active_dwell)
4040                 passive_dwell = active_dwell + 1;
4041
4042         for (i = 0, added = 0; i < sband->n_channels; i++) {
4043                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4044                         continue;
4045
4046                 scan_ch->channel = channels[i].hw_value;
4047
4048                 ch_info = iwl3945_get_channel_info(priv, band, scan_ch->channel);
4049                 if (!is_channel_valid(ch_info)) {
4050                         IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
4051                                        scan_ch->channel);
4052                         continue;
4053                 }
4054
4055                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4056                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4057                 /* If passive , set up for auto-switch
4058                  *  and use long active_dwell time.
4059                  */
4060                 if (!is_active || is_channel_passive(ch_info) ||
4061                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
4062                         scan_ch->type = 0;      /* passive */
4063                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
4064                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
4065                 } else {
4066                         scan_ch->type = 1;      /* active */
4067                 }
4068
4069                 /* Set direct probe bits. These may be used both for active
4070                  * scan channels (probes gets sent right away),
4071                  * or for passive channels (probes get se sent only after
4072                  * hearing clear Rx packet).*/
4073                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
4074                         if (n_probes)
4075                                 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4076                 } else {
4077                         /* uCode v1 does not allow setting direct probe bits on
4078                          * passive channel. */
4079                         if ((scan_ch->type & 1) && n_probes)
4080                                 scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
4081                 }
4082
4083                 /* Set txpower levels to defaults */
4084                 scan_ch->tpc.dsp_atten = 110;
4085                 /* scan_pwr_info->tpc.dsp_atten; */
4086
4087                 /*scan_pwr_info->tpc.tx_gain; */
4088                 if (band == IEEE80211_BAND_5GHZ)
4089                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4090                 else {
4091                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4092                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4093                          * power level:
4094                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4095                          */
4096                 }
4097
4098                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4099                                scan_ch->channel,
4100                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4101                                (scan_ch->type & 1) ?
4102                                active_dwell : passive_dwell);
4103
4104                 scan_ch++;
4105                 added++;
4106         }
4107
4108         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4109         return added;
4110 }
4111
4112 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
4113                               struct ieee80211_rate *rates)
4114 {
4115         int i;
4116
4117         for (i = 0; i < IWL_RATE_COUNT; i++) {
4118                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
4119                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4120                 rates[i].hw_value_short = i;
4121                 rates[i].flags = 0;
4122                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4123                         /*
4124                          * If CCK != 1M then set short preamble rate flag.
4125                          */
4126                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
4127                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
4128                 }
4129         }
4130 }
4131
4132 /**
4133  * iwl3945_init_geos - Initialize mac80211's geo/channel info based from eeprom
4134  */
4135 static int iwl3945_init_geos(struct iwl_priv *priv)
4136 {
4137         struct iwl_channel_info *ch;
4138         struct ieee80211_supported_band *sband;
4139         struct ieee80211_channel *channels;
4140         struct ieee80211_channel *geo_ch;
4141         struct ieee80211_rate *rates;
4142         int i = 0;
4143
4144         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4145             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4146                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4147                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4148                 return 0;
4149         }
4150
4151         channels = kzalloc(sizeof(struct ieee80211_channel) *
4152                            priv->channel_count, GFP_KERNEL);
4153         if (!channels)
4154                 return -ENOMEM;
4155
4156         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4157                         GFP_KERNEL);
4158         if (!rates) {
4159                 kfree(channels);
4160                 return -ENOMEM;
4161         }
4162
4163         /* 5.2GHz channels start after the 2.4GHz channels */
4164         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4165         sband->channels = &channels[ARRAY_SIZE(iwl3945_eeprom_band_1)];
4166         /* just OFDM */
4167         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4168         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4169
4170         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4171         sband->channels = channels;
4172         /* OFDM & CCK */
4173         sband->bitrates = rates;
4174         sband->n_bitrates = IWL_RATE_COUNT;
4175
4176         priv->ieee_channels = channels;
4177         priv->ieee_rates = rates;
4178
4179         iwl3945_init_hw_rates(priv, rates);
4180
4181         for (i = 0;  i < priv->channel_count; i++) {
4182                 ch = &priv->channel_info[i];
4183
4184                 /* FIXME: might be removed if scan is OK*/
4185                 if (!is_channel_valid(ch))
4186                         continue;
4187
4188                 if (is_channel_a_band(ch))
4189                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4190                 else
4191                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4192
4193                 geo_ch = &sband->channels[sband->n_channels++];
4194
4195                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4196                 geo_ch->max_power = ch->max_power_avg;
4197                 geo_ch->max_antenna_gain = 0xff;
4198                 geo_ch->hw_value = ch->channel;
4199
4200                 if (is_channel_valid(ch)) {
4201                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4202                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4203
4204                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4205                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4206
4207                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4208                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4209
4210                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
4211                                 priv->tx_power_channel_lmt =
4212                                     ch->max_power_avg;
4213                 } else {
4214                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4215                 }
4216
4217                 /* Save flags for reg domain usage */
4218                 geo_ch->orig_flags = geo_ch->flags;
4219
4220                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4221                                 ch->channel, geo_ch->center_freq,
4222                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4223                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4224                                 "restricted" : "valid",
4225                                  geo_ch->flags);
4226         }
4227
4228         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4229              priv->cfg->sku & IWL_SKU_A) {
4230                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
4231                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
4232                         priv->pci_dev->device, priv->pci_dev->subsystem_device);
4233                  priv->cfg->sku &= ~IWL_SKU_A;
4234         }
4235
4236         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4237                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4238                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4239
4240         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4241                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4242                         &priv->bands[IEEE80211_BAND_2GHZ];
4243         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4244                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4245                         &priv->bands[IEEE80211_BAND_5GHZ];
4246
4247         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4248
4249         return 0;
4250 }
4251
4252 /*
4253  * iwl3945_free_geos - undo allocations in iwl3945_init_geos
4254  */
4255 static void iwl3945_free_geos(struct iwl_priv *priv)
4256 {
4257         kfree(priv->ieee_channels);
4258         kfree(priv->ieee_rates);
4259         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
4260 }
4261
4262 /******************************************************************************
4263  *
4264  * uCode download functions
4265  *
4266  ******************************************************************************/
4267
4268 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
4269 {
4270         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
4271         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
4272         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4273         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
4274         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4275         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
4276 }
4277
4278 /**
4279  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
4280  *     looking at all data.
4281  */
4282 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
4283 {
4284         u32 val;
4285         u32 save_len = len;
4286         int rc = 0;
4287         u32 errcnt;
4288
4289         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4290
4291         rc = iwl_grab_nic_access(priv);
4292         if (rc)
4293                 return rc;
4294
4295         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4296                                IWL39_RTC_INST_LOWER_BOUND);
4297
4298         errcnt = 0;
4299         for (; len > 0; len -= sizeof(u32), image++) {
4300                 /* read data comes through single port, auto-incr addr */
4301                 /* NOTE: Use the debugless read so we don't flood kernel log
4302                  * if IWL_DL_IO is set */
4303                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4304                 if (val != le32_to_cpu(*image)) {
4305                         IWL_ERR(priv, "uCode INST section is invalid at "
4306                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4307                                   save_len - len, val, le32_to_cpu(*image));
4308                         rc = -EIO;
4309                         errcnt++;
4310                         if (errcnt >= 20)
4311                                 break;
4312                 }
4313         }
4314
4315         iwl_release_nic_access(priv);
4316
4317         if (!errcnt)
4318                 IWL_DEBUG_INFO("ucode image in INSTRUCTION memory is good\n");
4319
4320         return rc;
4321 }
4322
4323
4324 /**
4325  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
4326  *   using sample data 100 bytes apart.  If these sample points are good,
4327  *   it's a pretty good bet that everything between them is good, too.
4328  */
4329 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
4330 {
4331         u32 val;
4332         int rc = 0;
4333         u32 errcnt = 0;
4334         u32 i;
4335
4336         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
4337
4338         rc = iwl_grab_nic_access(priv);
4339         if (rc)
4340                 return rc;
4341
4342         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
4343                 /* read data comes through single port, auto-incr addr */
4344                 /* NOTE: Use the debugless read so we don't flood kernel log
4345                  * if IWL_DL_IO is set */
4346                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
4347                         i + IWL39_RTC_INST_LOWER_BOUND);
4348                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
4349                 if (val != le32_to_cpu(*image)) {
4350 #if 0 /* Enable this if you want to see details */
4351                         IWL_ERR(priv, "uCode INST section is invalid at "
4352                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
4353                                   i, val, *image);
4354 #endif
4355                         rc = -EIO;
4356                         errcnt++;
4357                         if (errcnt >= 3)
4358                                 break;
4359                 }
4360         }
4361
4362         iwl_release_nic_access(priv);
4363
4364         return rc;
4365 }
4366
4367
4368 /**
4369  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
4370  *    and verify its contents
4371  */
4372 static int iwl3945_verify_ucode(struct iwl_priv *priv)
4373 {
4374         __le32 *image;
4375         u32 len;
4376         int rc = 0;
4377
4378         /* Try bootstrap */
4379         image = (__le32 *)priv->ucode_boot.v_addr;
4380         len = priv->ucode_boot.len;
4381         rc = iwl3945_verify_inst_sparse(priv, image, len);
4382         if (rc == 0) {
4383                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
4384                 return 0;
4385         }
4386
4387         /* Try initialize */
4388         image = (__le32 *)priv->ucode_init.v_addr;
4389         len = priv->ucode_init.len;
4390         rc = iwl3945_verify_inst_sparse(priv, image, len);
4391         if (rc == 0) {
4392                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
4393                 return 0;
4394         }
4395
4396         /* Try runtime/protocol */
4397         image = (__le32 *)priv->ucode_code.v_addr;
4398         len = priv->ucode_code.len;
4399         rc = iwl3945_verify_inst_sparse(priv, image, len);
4400         if (rc == 0) {
4401                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
4402                 return 0;
4403         }
4404
4405         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
4406
4407         /* Since nothing seems to match, show first several data entries in
4408          * instruction SRAM, so maybe visual inspection will give a clue.
4409          * Selection of bootstrap image (vs. other images) is arbitrary. */
4410         image = (__le32 *)priv->ucode_boot.v_addr;
4411         len = priv->ucode_boot.len;
4412         rc = iwl3945_verify_inst_full(priv, image, len);
4413
4414         return rc;
4415 }
4416
4417 static void iwl3945_nic_start(struct iwl_priv *priv)
4418 {
4419         /* Remove all resets to allow NIC to operate */
4420         iwl_write32(priv, CSR_RESET, 0);
4421 }
4422
4423 /**
4424  * iwl3945_read_ucode - Read uCode images from disk file.
4425  *
4426  * Copy into buffers for card to fetch via bus-mastering
4427  */
4428 static int iwl3945_read_ucode(struct iwl_priv *priv)
4429 {
4430         struct iwl_ucode *ucode;
4431         int ret = -EINVAL, index;
4432         const struct firmware *ucode_raw;
4433         /* firmware file name contains uCode/driver compatibility version */
4434         const char *name_pre = priv->cfg->fw_name_pre;
4435         const unsigned int api_max = priv->cfg->ucode_api_max;
4436         const unsigned int api_min = priv->cfg->ucode_api_min;
4437         char buf[25];
4438         u8 *src;
4439         size_t len;
4440         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
4441
4442         /* Ask kernel firmware_class module to get the boot firmware off disk.
4443          * request_firmware() is synchronous, file is in memory on return. */
4444         for (index = api_max; index >= api_min; index--) {
4445                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
4446                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
4447                 if (ret < 0) {
4448                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
4449                                   buf, ret);
4450                         if (ret == -ENOENT)
4451                                 continue;
4452                         else
4453                                 goto error;
4454                 } else {
4455                         if (index < api_max)
4456                                 IWL_ERR(priv, "Loaded firmware %s, "
4457                                         "which is deprecated. "
4458                                         " Please use API v%u instead.\n",
4459                                           buf, api_max);
4460                         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
4461                                        buf, ucode_raw->size);
4462                         break;
4463                 }
4464         }
4465
4466         if (ret < 0)
4467                 goto error;
4468
4469         /* Make sure that we got at least our header! */
4470         if (ucode_raw->size < sizeof(*ucode)) {
4471                 IWL_ERR(priv, "File size way too small!\n");
4472                 ret = -EINVAL;
4473                 goto err_release;
4474         }
4475
4476         /* Data from ucode file:  header followed by uCode images */
4477         ucode = (void *)ucode_raw->data;
4478
4479         priv->ucode_ver = le32_to_cpu(ucode->ver);
4480         api_ver = IWL_UCODE_API(priv->ucode_ver);
4481         inst_size = le32_to_cpu(ucode->inst_size);
4482         data_size = le32_to_cpu(ucode->data_size);
4483         init_size = le32_to_cpu(ucode->init_size);
4484         init_data_size = le32_to_cpu(ucode->init_data_size);
4485         boot_size = le32_to_cpu(ucode->boot_size);
4486
4487         /* api_ver should match the api version forming part of the
4488          * firmware filename ... but we don't check for that and only rely
4489          * on the API version read from firware header from here on forward */
4490
4491         if (api_ver < api_min || api_ver > api_max) {
4492                 IWL_ERR(priv, "Driver unable to support your firmware API. "
4493                           "Driver supports v%u, firmware is v%u.\n",
4494                           api_max, api_ver);
4495                 priv->ucode_ver = 0;
4496                 ret = -EINVAL;
4497                 goto err_release;
4498         }
4499         if (api_ver != api_max)
4500                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
4501                           "got %u. New firmware can be obtained "
4502                           "from http://www.intellinuxwireless.org.\n",
4503                           api_max, api_ver);
4504
4505         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
4506                 IWL_UCODE_MAJOR(priv->ucode_ver),
4507                 IWL_UCODE_MINOR(priv->ucode_ver),
4508                 IWL_UCODE_API(priv->ucode_ver),
4509                 IWL_UCODE_SERIAL(priv->ucode_ver));
4510
4511         IWL_DEBUG_INFO("f/w package hdr ucode version raw = 0x%x\n",
4512                        priv->ucode_ver);
4513         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n", inst_size);
4514         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n", data_size);
4515         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n", init_size);
4516         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n", init_data_size);
4517         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n", boot_size);
4518
4519
4520         /* Verify size of file vs. image size info in file's header */
4521         if (ucode_raw->size < sizeof(*ucode) +
4522                 inst_size + data_size + init_size +
4523                 init_data_size + boot_size) {
4524
4525                 IWL_DEBUG_INFO("uCode file size %d too small\n",
4526                                (int)ucode_raw->size);
4527                 ret = -EINVAL;
4528                 goto err_release;
4529         }
4530
4531         /* Verify that uCode images will fit in card's SRAM */
4532         if (inst_size > IWL39_MAX_INST_SIZE) {
4533                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
4534                                inst_size);
4535                 ret = -EINVAL;
4536                 goto err_release;
4537         }
4538
4539         if (data_size > IWL39_MAX_DATA_SIZE) {
4540                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
4541                                data_size);
4542                 ret = -EINVAL;
4543                 goto err_release;
4544         }
4545         if (init_size > IWL39_MAX_INST_SIZE) {
4546                 IWL_DEBUG_INFO("uCode init instr len %d too large to fit in\n",
4547                                 init_size);
4548                 ret = -EINVAL;
4549                 goto err_release;
4550         }
4551         if (init_data_size > IWL39_MAX_DATA_SIZE) {
4552                 IWL_DEBUG_INFO("uCode init data len %d too large to fit in\n",
4553                                 init_data_size);
4554                 ret = -EINVAL;
4555                 goto err_release;
4556         }
4557         if (boot_size > IWL39_MAX_BSM_SIZE) {
4558                 IWL_DEBUG_INFO("uCode boot instr len %d too large to fit in\n",
4559                                 boot_size);
4560                 ret = -EINVAL;
4561                 goto err_release;
4562         }
4563
4564         /* Allocate ucode buffers for card's bus-master loading ... */
4565
4566         /* Runtime instructions and 2 copies of data:
4567          * 1) unmodified from disk
4568          * 2) backup cache for save/restore during power-downs */
4569         priv->ucode_code.len = inst_size;
4570         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
4571
4572         priv->ucode_data.len = data_size;
4573         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
4574
4575         priv->ucode_data_backup.len = data_size;
4576         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
4577
4578         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
4579             !priv->ucode_data_backup.v_addr)
4580                 goto err_pci_alloc;
4581
4582         /* Initialization instructions and data */
4583         if (init_size && init_data_size) {
4584                 priv->ucode_init.len = init_size;
4585                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
4586
4587                 priv->ucode_init_data.len = init_data_size;
4588                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
4589
4590                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
4591                         goto err_pci_alloc;
4592         }
4593
4594         /* Bootstrap (instructions only, no data) */
4595         if (boot_size) {
4596                 priv->ucode_boot.len = boot_size;
4597                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
4598
4599                 if (!priv->ucode_boot.v_addr)
4600                         goto err_pci_alloc;
4601         }
4602
4603         /* Copy images into buffers for card's bus-master reads ... */
4604
4605         /* Runtime instructions (first block of data in file) */
4606         src = &ucode->data[0];
4607         len = priv->ucode_code.len;
4608         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
4609         memcpy(priv->ucode_code.v_addr, src, len);
4610         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
4611                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
4612
4613         /* Runtime data (2nd block)
4614          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
4615         src = &ucode->data[inst_size];
4616         len = priv->ucode_data.len;
4617         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
4618         memcpy(priv->ucode_data.v_addr, src, len);
4619         memcpy(priv->ucode_data_backup.v_addr, src, len);
4620
4621         /* Initialization instructions (3rd block) */
4622         if (init_size) {
4623                 src = &ucode->data[inst_size + data_size];
4624                 len = priv->ucode_init.len;
4625                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
4626                                len);
4627                 memcpy(priv->ucode_init.v_addr, src, len);
4628         }
4629
4630         /* Initialization data (4th block) */
4631         if (init_data_size) {
4632                 src = &ucode->data[inst_size + data_size + init_size];
4633                 len = priv->ucode_init_data.len;
4634                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
4635                                (int)len);
4636                 memcpy(priv->ucode_init_data.v_addr, src, len);
4637         }
4638
4639         /* Bootstrap instructions (5th block) */
4640         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
4641         len = priv->ucode_boot.len;
4642         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
4643                        (int)len);
4644         memcpy(priv->ucode_boot.v_addr, src, len);
4645
4646         /* We have our copies now, allow OS release its copies */
4647         release_firmware(ucode_raw);
4648         return 0;
4649
4650  err_pci_alloc:
4651         IWL_ERR(priv, "failed to allocate pci memory\n");
4652         ret = -ENOMEM;
4653         iwl3945_dealloc_ucode_pci(priv);
4654
4655  err_release:
4656         release_firmware(ucode_raw);
4657
4658  error:
4659         return ret;
4660 }
4661
4662
4663 /**
4664  * iwl3945_set_ucode_ptrs - Set uCode address location
4665  *
4666  * Tell initialization uCode where to find runtime uCode.
4667  *
4668  * BSM registers initially contain pointers to initialization uCode.
4669  * We need to replace them to load runtime uCode inst and data,
4670  * and to save runtime data when powering down.
4671  */
4672 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
4673 {
4674         dma_addr_t pinst;
4675         dma_addr_t pdata;
4676         int rc = 0;
4677         unsigned long flags;
4678
4679         /* bits 31:0 for 3945 */
4680         pinst = priv->ucode_code.p_addr;
4681         pdata = priv->ucode_data_backup.p_addr;
4682
4683         spin_lock_irqsave(&priv->lock, flags);
4684         rc = iwl_grab_nic_access(priv);
4685         if (rc) {
4686                 spin_unlock_irqrestore(&priv->lock, flags);
4687                 return rc;
4688         }
4689
4690         /* Tell bootstrap uCode where to find image to load */
4691         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
4692         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
4693         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
4694                                  priv->ucode_data.len);
4695
4696         /* Inst byte count must be last to set up, bit 31 signals uCode
4697          *   that all new ptr/size info is in place */
4698         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
4699                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
4700
4701         iwl_release_nic_access(priv);
4702
4703         spin_unlock_irqrestore(&priv->lock, flags);
4704
4705         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
4706
4707         return rc;
4708 }
4709
4710 /**
4711  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
4712  *
4713  * Called after REPLY_ALIVE notification received from "initialize" uCode.
4714  *
4715  * Tell "initialize" uCode to go ahead and load the runtime uCode.
4716  */
4717 static void iwl3945_init_alive_start(struct iwl_priv *priv)
4718 {
4719         /* Check alive response for "valid" sign from uCode */
4720         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
4721                 /* We had an error bringing up the hardware, so take it
4722                  * all the way back down so we can try again */
4723                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
4724                 goto restart;
4725         }
4726
4727         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
4728          * This is a paranoid check, because we would not have gotten the
4729          * "initialize" alive if code weren't properly loaded.  */
4730         if (iwl3945_verify_ucode(priv)) {
4731                 /* Runtime instruction load was bad;
4732                  * take it all the way back down so we can try again */
4733                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
4734                 goto restart;
4735         }
4736
4737         /* Send pointers to protocol/runtime uCode image ... init code will
4738          * load and launch runtime uCode, which will send us another "Alive"
4739          * notification. */
4740         IWL_DEBUG_INFO("Initialization Alive received.\n");
4741         if (iwl3945_set_ucode_ptrs(priv)) {
4742                 /* Runtime instruction load won't happen;
4743                  * take it all the way back down so we can try again */
4744                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
4745                 goto restart;
4746         }
4747         return;
4748
4749  restart:
4750         queue_work(priv->workqueue, &priv->restart);
4751 }
4752
4753
4754 /* temporary */
4755 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw,
4756                                      struct sk_buff *skb);
4757
4758 /**
4759  * iwl3945_alive_start - called after REPLY_ALIVE notification received
4760  *                   from protocol/runtime uCode (initialization uCode's
4761  *                   Alive gets handled by iwl3945_init_alive_start()).
4762  */
4763 static void iwl3945_alive_start(struct iwl_priv *priv)
4764 {
4765         int rc = 0;
4766         int thermal_spin = 0;
4767         u32 rfkill;
4768
4769         IWL_DEBUG_INFO("Runtime Alive received.\n");
4770
4771         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
4772                 /* We had an error bringing up the hardware, so take it
4773                  * all the way back down so we can try again */
4774                 IWL_DEBUG_INFO("Alive failed.\n");
4775                 goto restart;
4776         }
4777
4778         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
4779          * This is a paranoid check, because we would not have gotten the
4780          * "runtime" alive if code weren't properly loaded.  */
4781         if (iwl3945_verify_ucode(priv)) {
4782                 /* Runtime instruction load was bad;
4783                  * take it all the way back down so we can try again */
4784                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
4785                 goto restart;
4786         }
4787
4788         iwl3945_clear_stations_table(priv);
4789
4790         rc = iwl_grab_nic_access(priv);
4791         if (rc) {
4792                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
4793                 return;
4794         }
4795
4796         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
4797         IWL_DEBUG_INFO("RFKILL status: 0x%x\n", rfkill);
4798         iwl_release_nic_access(priv);
4799
4800         if (rfkill & 0x1) {
4801                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4802                 /* if RFKILL is not on, then wait for thermal
4803                  * sensor in adapter to kick in */
4804                 while (iwl3945_hw_get_temperature(priv) == 0) {
4805                         thermal_spin++;
4806                         udelay(10);
4807                 }
4808
4809                 if (thermal_spin)
4810                         IWL_DEBUG_INFO("Thermal calibration took %dus\n",
4811                                        thermal_spin * 10);
4812         } else
4813                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4814
4815         /* After the ALIVE response, we can send commands to 3945 uCode */
4816         set_bit(STATUS_ALIVE, &priv->status);
4817
4818         /* Clear out the uCode error bit if it is set */
4819         clear_bit(STATUS_FW_ERROR, &priv->status);
4820
4821         if (iwl_is_rfkill(priv))
4822                 return;
4823
4824         ieee80211_wake_queues(priv->hw);
4825
4826         priv->active_rate = priv->rates_mask;
4827         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
4828
4829         iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
4830
4831         if (iwl3945_is_associated(priv)) {
4832                 struct iwl3945_rxon_cmd *active_rxon =
4833                                 (struct iwl3945_rxon_cmd *)(&priv->active39_rxon);
4834
4835                 memcpy(&priv->staging39_rxon, &priv->active39_rxon,
4836                        sizeof(priv->staging39_rxon));
4837                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4838         } else {
4839                 /* Initialize our rx_config data */
4840                 iwl3945_connection_init_rx_config(priv, priv->iw_mode);
4841                 memcpy(priv->staging39_rxon.node_addr, priv->mac_addr, ETH_ALEN);
4842         }
4843
4844         /* Configure Bluetooth device coexistence support */
4845         iwl3945_send_bt_config(priv);
4846
4847         /* Configure the adapter for unassociated operation */
4848         iwl3945_commit_rxon(priv);
4849
4850         iwl3945_reg_txpower_periodic(priv);
4851
4852         iwl3945_led_register(priv);
4853
4854         IWL_DEBUG_INFO("ALIVE processing complete.\n");
4855         set_bit(STATUS_READY, &priv->status);
4856         wake_up_interruptible(&priv->wait_command_queue);
4857
4858         if (priv->error_recovering)
4859                 iwl3945_error_recovery(priv);
4860
4861         /* reassociate for ADHOC mode */
4862         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
4863                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
4864                                                                 priv->vif);
4865                 if (beacon)
4866                         iwl3945_mac_beacon_update(priv->hw, beacon);
4867         }
4868
4869         return;
4870
4871  restart:
4872         queue_work(priv->workqueue, &priv->restart);
4873 }
4874
4875 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
4876
4877 static void __iwl3945_down(struct iwl_priv *priv)
4878 {
4879         unsigned long flags;
4880         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
4881         struct ieee80211_conf *conf = NULL;
4882
4883         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
4884
4885         conf = ieee80211_get_hw_conf(priv->hw);
4886
4887         if (!exit_pending)
4888                 set_bit(STATUS_EXIT_PENDING, &priv->status);
4889
4890         iwl3945_led_unregister(priv);
4891         iwl3945_clear_stations_table(priv);
4892
4893         /* Unblock any waiting calls */
4894         wake_up_interruptible_all(&priv->wait_command_queue);
4895
4896         /* Wipe out the EXIT_PENDING status bit if we are not actually
4897          * exiting the module */
4898         if (!exit_pending)
4899                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
4900
4901         /* stop and reset the on-board processor */
4902         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4903
4904         /* tell the device to stop sending interrupts */
4905         spin_lock_irqsave(&priv->lock, flags);
4906         iwl3945_disable_interrupts(priv);
4907         spin_unlock_irqrestore(&priv->lock, flags);
4908         iwl_synchronize_irq(priv);
4909
4910         if (priv->mac80211_registered)
4911                 ieee80211_stop_queues(priv->hw);
4912
4913         /* If we have not previously called iwl3945_init() then
4914          * clear all bits but the RF Kill and SUSPEND bits and return */
4915         if (!iwl_is_init(priv)) {
4916                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4917                                         STATUS_RF_KILL_HW |
4918                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4919                                         STATUS_RF_KILL_SW |
4920                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4921                                         STATUS_GEO_CONFIGURED |
4922                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4923                                         STATUS_IN_SUSPEND |
4924                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
4925                                         STATUS_EXIT_PENDING;
4926                 goto exit;
4927         }
4928
4929         /* ...otherwise clear out all the status bits but the RF Kill and
4930          * SUSPEND bits and continue taking the NIC down. */
4931         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
4932                                 STATUS_RF_KILL_HW |
4933                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
4934                                 STATUS_RF_KILL_SW |
4935                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
4936                                 STATUS_GEO_CONFIGURED |
4937                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
4938                                 STATUS_IN_SUSPEND |
4939                         test_bit(STATUS_FW_ERROR, &priv->status) <<
4940                                 STATUS_FW_ERROR |
4941                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
4942                                 STATUS_EXIT_PENDING;
4943
4944         priv->cfg->ops->lib->apm_ops.reset(priv);
4945         spin_lock_irqsave(&priv->lock, flags);
4946         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4947         spin_unlock_irqrestore(&priv->lock, flags);
4948
4949         iwl3945_hw_txq_ctx_stop(priv);
4950         iwl3945_hw_rxq_stop(priv);
4951
4952         spin_lock_irqsave(&priv->lock, flags);
4953         if (!iwl_grab_nic_access(priv)) {
4954                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
4955                                          APMG_CLK_VAL_DMA_CLK_RQT);
4956                 iwl_release_nic_access(priv);
4957         }
4958         spin_unlock_irqrestore(&priv->lock, flags);
4959
4960         udelay(5);
4961
4962         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
4963                 priv->cfg->ops->lib->apm_ops.stop(priv);
4964         else
4965                 priv->cfg->ops->lib->apm_ops.reset(priv);
4966
4967  exit:
4968         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
4969
4970         if (priv->ibss_beacon)
4971                 dev_kfree_skb(priv->ibss_beacon);
4972         priv->ibss_beacon = NULL;
4973
4974         /* clear out any free frames */
4975         iwl3945_clear_free_frames(priv);
4976 }
4977
4978 static void iwl3945_down(struct iwl_priv *priv)
4979 {
4980         mutex_lock(&priv->mutex);
4981         __iwl3945_down(priv);
4982         mutex_unlock(&priv->mutex);
4983
4984         iwl3945_cancel_deferred_work(priv);
4985 }
4986
4987 #define MAX_HW_RESTARTS 5
4988
4989 static int __iwl3945_up(struct iwl_priv *priv)
4990 {
4991         int rc, i;
4992
4993         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4994                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
4995                 return -EIO;
4996         }
4997
4998         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
4999                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
5000                             "parameter)\n");
5001                 return -ENODEV;
5002         }
5003
5004         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5005                 IWL_ERR(priv, "ucode not available for device bring up\n");
5006                 return -EIO;
5007         }
5008
5009         /* If platform's RF_KILL switch is NOT set to KILL */
5010         if (iwl_read32(priv, CSR_GP_CNTRL) &
5011                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5012                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5013         else {
5014                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5015                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5016                         IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
5017                         return -ENODEV;
5018                 }
5019         }
5020
5021         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5022
5023         rc = iwl3945_hw_nic_init(priv);
5024         if (rc) {
5025                 IWL_ERR(priv, "Unable to int nic\n");
5026                 return rc;
5027         }
5028
5029         /* make sure rfkill handshake bits are cleared */
5030         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5031         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5032                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5033
5034         /* clear (again), then enable host interrupts */
5035         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5036         iwl3945_enable_interrupts(priv);
5037
5038         /* really make sure rfkill handshake bits are cleared */
5039         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5040         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5041
5042         /* Copy original ucode data image from disk into backup cache.
5043          * This will be used to initialize the on-board processor's
5044          * data SRAM for a clean start when the runtime program first loads. */
5045         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5046                priv->ucode_data.len);
5047
5048         /* We return success when we resume from suspend and rf_kill is on. */
5049         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5050                 return 0;
5051
5052         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5053
5054                 iwl3945_clear_stations_table(priv);
5055
5056                 /* load bootstrap state machine,
5057                  * load bootstrap program into processor's memory,
5058                  * prepare to load the "initialize" uCode */
5059                 priv->cfg->ops->lib->load_ucode(priv);
5060
5061                 if (rc) {
5062                         IWL_ERR(priv,
5063                                 "Unable to set up bootstrap uCode: %d\n", rc);
5064                         continue;
5065                 }
5066
5067                 /* start card; "initialize" will load runtime ucode */
5068                 iwl3945_nic_start(priv);
5069
5070                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5071
5072                 return 0;
5073         }
5074
5075         set_bit(STATUS_EXIT_PENDING, &priv->status);
5076         __iwl3945_down(priv);
5077         clear_bit(STATUS_EXIT_PENDING, &priv->status);
5078
5079         /* tried to restart and config the device for as long as our
5080          * patience could withstand */
5081         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
5082         return -EIO;
5083 }
5084
5085
5086 /*****************************************************************************
5087  *
5088  * Workqueue callbacks
5089  *
5090  *****************************************************************************/
5091
5092 static void iwl3945_bg_init_alive_start(struct work_struct *data)
5093 {
5094         struct iwl_priv *priv =
5095             container_of(data, struct iwl_priv, init_alive_start.work);
5096
5097         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5098                 return;
5099
5100         mutex_lock(&priv->mutex);
5101         iwl3945_init_alive_start(priv);
5102         mutex_unlock(&priv->mutex);
5103 }
5104
5105 static void iwl3945_bg_alive_start(struct work_struct *data)
5106 {
5107         struct iwl_priv *priv =
5108             container_of(data, struct iwl_priv, alive_start.work);
5109
5110         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5111                 return;
5112
5113         mutex_lock(&priv->mutex);
5114         iwl3945_alive_start(priv);
5115         mutex_unlock(&priv->mutex);
5116 }
5117
5118 static void iwl3945_rfkill_poll(struct work_struct *data)
5119 {
5120         struct iwl_priv *priv =
5121             container_of(data, struct iwl_priv, rfkill_poll.work);
5122         unsigned long status = priv->status;
5123
5124         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5125                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5126         else
5127                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5128
5129         if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))
5130                 queue_work(priv->workqueue, &priv->rf_kill);
5131
5132         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
5133                            round_jiffies_relative(2 * HZ));
5134
5135 }
5136
5137 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5138
5139 static void iwl3945_bg_scan_check(struct work_struct *data)
5140 {
5141         struct iwl_priv *priv =
5142             container_of(data, struct iwl_priv, scan_check.work);
5143
5144         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5145                 return;
5146
5147         mutex_lock(&priv->mutex);
5148         if (test_bit(STATUS_SCANNING, &priv->status) ||
5149             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5150                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5151                           "Scan completion watchdog resetting adapter (%dms)\n",
5152                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5153
5154                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5155                         iwl3945_send_scan_abort(priv);
5156         }
5157         mutex_unlock(&priv->mutex);
5158 }
5159
5160 static void iwl3945_bg_request_scan(struct work_struct *data)
5161 {
5162         struct iwl_priv *priv =
5163             container_of(data, struct iwl_priv, request_scan);
5164         struct iwl_host_cmd cmd = {
5165                 .id = REPLY_SCAN_CMD,
5166                 .len = sizeof(struct iwl3945_scan_cmd),
5167                 .meta.flags = CMD_SIZE_HUGE,
5168         };
5169         int rc = 0;
5170         struct iwl3945_scan_cmd *scan;
5171         struct ieee80211_conf *conf = NULL;
5172         u8 n_probes = 2;
5173         enum ieee80211_band band;
5174         DECLARE_SSID_BUF(ssid);
5175
5176         conf = ieee80211_get_hw_conf(priv->hw);
5177
5178         mutex_lock(&priv->mutex);
5179
5180         if (!iwl_is_ready(priv)) {
5181                 IWL_WARN(priv, "request scan called when driver not ready.\n");
5182                 goto done;
5183         }
5184
5185         /* Make sure the scan wasn't canceled before this queued work
5186          * was given the chance to run... */
5187         if (!test_bit(STATUS_SCANNING, &priv->status))
5188                 goto done;
5189
5190         /* This should never be called or scheduled if there is currently
5191          * a scan active in the hardware. */
5192         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5193                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5194                                "Ignoring second request.\n");
5195                 rc = -EIO;
5196                 goto done;
5197         }
5198
5199         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5200                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5201                 goto done;
5202         }
5203
5204         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5205                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5206                 goto done;
5207         }
5208
5209         if (iwl_is_rfkill(priv)) {
5210                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5211                 goto done;
5212         }
5213
5214         if (!test_bit(STATUS_READY, &priv->status)) {
5215                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5216                 goto done;
5217         }
5218
5219         if (!priv->scan_bands) {
5220                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5221                 goto done;
5222         }
5223
5224         if (!priv->scan) {
5225                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
5226                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5227                 if (!priv->scan) {
5228                         rc = -ENOMEM;
5229                         goto done;
5230                 }
5231         }
5232         scan = priv->scan;
5233         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
5234
5235         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5236         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5237
5238         if (iwl3945_is_associated(priv)) {
5239                 u16 interval = 0;
5240                 u32 extra;
5241                 u32 suspend_time = 100;
5242                 u32 scan_suspend_time = 100;
5243                 unsigned long flags;
5244
5245                 IWL_DEBUG_INFO("Scanning while associated...\n");
5246
5247                 spin_lock_irqsave(&priv->lock, flags);
5248                 interval = priv->beacon_int;
5249                 spin_unlock_irqrestore(&priv->lock, flags);
5250
5251                 scan->suspend_time = 0;
5252                 scan->max_out_time = cpu_to_le32(200 * 1024);
5253                 if (!interval)
5254                         interval = suspend_time;
5255                 /*
5256                  * suspend time format:
5257                  *  0-19: beacon interval in usec (time before exec.)
5258                  * 20-23: 0
5259                  * 24-31: number of beacons (suspend between channels)
5260                  */
5261
5262                 extra = (suspend_time / interval) << 24;
5263                 scan_suspend_time = 0xFF0FFFFF &
5264                     (extra | ((suspend_time % interval) * 1024));
5265
5266                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5267                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5268                                scan_suspend_time, interval);
5269         }
5270
5271         /* We should add the ability for user to lock to PASSIVE ONLY */
5272         if (priv->one_direct_scan) {
5273                 IWL_DEBUG_SCAN
5274                     ("Kicking off one direct scan for '%s'\n",
5275                      print_ssid(ssid, priv->direct_ssid,
5276                                 priv->direct_ssid_len));
5277                 scan->direct_scan[0].id = WLAN_EID_SSID;
5278                 scan->direct_scan[0].len = priv->direct_ssid_len;
5279                 memcpy(scan->direct_scan[0].ssid,
5280                        priv->direct_ssid, priv->direct_ssid_len);
5281                 n_probes++;
5282         } else
5283                 IWL_DEBUG_SCAN("Kicking off one indirect scan.\n");
5284
5285         /* We don't build a direct scan probe request; the uCode will do
5286          * that based on the direct_mask added to each channel entry */
5287         scan->tx_cmd.len = cpu_to_le16(
5288                 iwl3945_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
5289                         IWL_MAX_SCAN_SIZE - sizeof(*scan)));
5290         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
5291         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
5292         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
5293
5294         /* flags + rate selection */
5295
5296         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
5297                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
5298                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
5299                 scan->good_CRC_th = 0;
5300                 band = IEEE80211_BAND_2GHZ;
5301         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
5302                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
5303                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
5304                 band = IEEE80211_BAND_5GHZ;
5305         } else {
5306                 IWL_WARN(priv, "Invalid scan band count\n");
5307                 goto done;
5308         }
5309
5310         /* select Rx antennas */
5311         scan->flags |= iwl3945_get_antenna_flags(priv);
5312
5313         if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
5314                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
5315
5316         scan->channel_count =
5317                 iwl3945_get_channels_for_scan(priv, band, 1, /* active */
5318                                               n_probes,
5319                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
5320
5321         if (scan->channel_count == 0) {
5322                 IWL_DEBUG_SCAN("channel count %d\n", scan->channel_count);
5323                 goto done;
5324         }
5325
5326         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
5327             scan->channel_count * sizeof(struct iwl3945_scan_channel);
5328         cmd.data = scan;
5329         scan->len = cpu_to_le16(cmd.len);
5330
5331         set_bit(STATUS_SCAN_HW, &priv->status);
5332         rc = iwl_send_cmd_sync(priv, &cmd);
5333         if (rc)
5334                 goto done;
5335
5336         queue_delayed_work(priv->workqueue, &priv->scan_check,
5337                            IWL_SCAN_CHECK_WATCHDOG);
5338
5339         mutex_unlock(&priv->mutex);
5340         return;
5341
5342  done:
5343         /* can not perform scan make sure we clear scanning
5344          * bits from status so next scan request can be performed.
5345          * if we dont clear scanning status bit here all next scan
5346          * will fail
5347         */
5348         clear_bit(STATUS_SCAN_HW, &priv->status);
5349         clear_bit(STATUS_SCANNING, &priv->status);
5350
5351         /* inform mac80211 scan aborted */
5352         queue_work(priv->workqueue, &priv->scan_completed);
5353         mutex_unlock(&priv->mutex);
5354 }
5355
5356 static void iwl3945_bg_up(struct work_struct *data)
5357 {
5358         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
5359
5360         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5361                 return;
5362
5363         mutex_lock(&priv->mutex);
5364         __iwl3945_up(priv);
5365         mutex_unlock(&priv->mutex);
5366         iwl_rfkill_set_hw_state(priv);
5367 }
5368
5369 static void iwl3945_bg_restart(struct work_struct *data)
5370 {
5371         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
5372
5373         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5374                 return;
5375
5376         iwl3945_down(priv);
5377         queue_work(priv->workqueue, &priv->up);
5378 }
5379
5380 static void iwl3945_bg_rx_replenish(struct work_struct *data)
5381 {
5382         struct iwl_priv *priv =
5383             container_of(data, struct iwl_priv, rx_replenish);
5384
5385         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5386                 return;
5387
5388         mutex_lock(&priv->mutex);
5389         iwl3945_rx_replenish(priv);
5390         mutex_unlock(&priv->mutex);
5391 }
5392
5393 #define IWL_DELAY_NEXT_SCAN (HZ*2)
5394
5395 static void iwl3945_post_associate(struct iwl_priv *priv)
5396 {
5397         int rc = 0;
5398         struct ieee80211_conf *conf = NULL;
5399
5400         if (priv->iw_mode == NL80211_IFTYPE_AP) {
5401                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
5402                 return;
5403         }
5404
5405
5406         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
5407                         priv->assoc_id, priv->active39_rxon.bssid_addr);
5408
5409         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5410                 return;
5411
5412         if (!priv->vif || !priv->is_open)
5413                 return;
5414
5415         iwl_scan_cancel_timeout(priv, 200);
5416
5417         conf = ieee80211_get_hw_conf(priv->hw);
5418
5419         priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5420         iwl3945_commit_rxon(priv);
5421
5422         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
5423         iwl3945_setup_rxon_timing(priv);
5424         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5425                               sizeof(priv->rxon_timing), &priv->rxon_timing);
5426         if (rc)
5427                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
5428                             "Attempting to continue.\n");
5429
5430         priv->staging39_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5431
5432         priv->staging39_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5433
5434         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
5435                         priv->assoc_id, priv->beacon_int);
5436
5437         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5438                 priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5439         else
5440                 priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5441
5442         if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5443                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
5444                         priv->staging39_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
5445                 else
5446                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5447
5448                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
5449                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
5450
5451         }
5452
5453         iwl3945_commit_rxon(priv);
5454
5455         switch (priv->iw_mode) {
5456         case NL80211_IFTYPE_STATION:
5457                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
5458                 break;
5459
5460         case NL80211_IFTYPE_ADHOC:
5461
5462                 priv->assoc_id = 1;
5463                 iwl3945_add_station(priv, priv->bssid, 0, 0);
5464                 iwl3945_sync_sta(priv, IWL_STA_ID,
5465                                  (priv->band == IEEE80211_BAND_5GHZ) ?
5466                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
5467                                  CMD_ASYNC);
5468                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
5469                 iwl3945_send_beacon_cmd(priv);
5470
5471                 break;
5472
5473         default:
5474                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
5475                            __func__, priv->iw_mode);
5476                 break;
5477         }
5478
5479         iwl3945_activate_qos(priv, 0);
5480
5481         /* we have just associated, don't start scan too early */
5482         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
5483 }
5484
5485 static void iwl3945_bg_abort_scan(struct work_struct *work)
5486 {
5487         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
5488
5489         if (!iwl_is_ready(priv))
5490                 return;
5491
5492         mutex_lock(&priv->mutex);
5493
5494         set_bit(STATUS_SCAN_ABORTING, &priv->status);
5495         iwl3945_send_scan_abort(priv);
5496
5497         mutex_unlock(&priv->mutex);
5498 }
5499
5500 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed);
5501
5502 static void iwl3945_bg_scan_completed(struct work_struct *work)
5503 {
5504         struct iwl_priv *priv =
5505             container_of(work, struct iwl_priv, scan_completed);
5506
5507         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
5508
5509         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5510                 return;
5511
5512         if (test_bit(STATUS_CONF_PENDING, &priv->status))
5513                 iwl3945_mac_config(priv->hw, 0);
5514
5515         ieee80211_scan_completed(priv->hw);
5516
5517         /* Since setting the TXPOWER may have been deferred while
5518          * performing the scan, fire one off */
5519         mutex_lock(&priv->mutex);
5520         priv->cfg->ops->lib->send_tx_power(priv);
5521         mutex_unlock(&priv->mutex);
5522 }
5523
5524 /*****************************************************************************
5525  *
5526  * mac80211 entry point functions
5527  *
5528  *****************************************************************************/
5529
5530 #define UCODE_READY_TIMEOUT     (2 * HZ)
5531
5532 static int iwl3945_mac_start(struct ieee80211_hw *hw)
5533 {
5534         struct iwl_priv *priv = hw->priv;
5535         int ret;
5536
5537         IWL_DEBUG_MAC80211("enter\n");
5538
5539         /* we should be verifying the device is ready to be opened */
5540         mutex_lock(&priv->mutex);
5541
5542         memset(&priv->staging39_rxon, 0, sizeof(struct iwl3945_rxon_cmd));
5543         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
5544          * ucode filename and max sizes are card-specific. */
5545
5546         if (!priv->ucode_code.len) {
5547                 ret = iwl3945_read_ucode(priv);
5548                 if (ret) {
5549                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
5550                         mutex_unlock(&priv->mutex);
5551                         goto out_release_irq;
5552                 }
5553         }
5554
5555         ret = __iwl3945_up(priv);
5556
5557         mutex_unlock(&priv->mutex);
5558
5559         iwl_rfkill_set_hw_state(priv);
5560
5561         if (ret)
5562                 goto out_release_irq;
5563
5564         IWL_DEBUG_INFO("Start UP work.\n");
5565
5566         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
5567                 return 0;
5568
5569         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
5570          * mac80211 will not be run successfully. */
5571         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
5572                         test_bit(STATUS_READY, &priv->status),
5573                         UCODE_READY_TIMEOUT);
5574         if (!ret) {
5575                 if (!test_bit(STATUS_READY, &priv->status)) {
5576                         IWL_ERR(priv,
5577                                 "Wait for START_ALIVE timeout after %dms.\n",
5578                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
5579                         ret = -ETIMEDOUT;
5580                         goto out_release_irq;
5581                 }
5582         }
5583
5584         /* ucode is running and will send rfkill notifications,
5585          * no need to poll the killswitch state anymore */
5586         cancel_delayed_work(&priv->rfkill_poll);
5587
5588         priv->is_open = 1;
5589         IWL_DEBUG_MAC80211("leave\n");
5590         return 0;
5591
5592 out_release_irq:
5593         priv->is_open = 0;
5594         IWL_DEBUG_MAC80211("leave - failed\n");
5595         return ret;
5596 }
5597
5598 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
5599 {
5600         struct iwl_priv *priv = hw->priv;
5601
5602         IWL_DEBUG_MAC80211("enter\n");
5603
5604         if (!priv->is_open) {
5605                 IWL_DEBUG_MAC80211("leave - skip\n");
5606                 return;
5607         }
5608
5609         priv->is_open = 0;
5610
5611         if (iwl_is_ready_rf(priv)) {
5612                 /* stop mac, cancel any scan request and clear
5613                  * RXON_FILTER_ASSOC_MSK BIT
5614                  */
5615                 mutex_lock(&priv->mutex);
5616                 iwl_scan_cancel_timeout(priv, 100);
5617                 mutex_unlock(&priv->mutex);
5618         }
5619
5620         iwl3945_down(priv);
5621
5622         flush_workqueue(priv->workqueue);
5623
5624         /* start polling the killswitch state again */
5625         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
5626                            round_jiffies_relative(2 * HZ));
5627
5628         IWL_DEBUG_MAC80211("leave\n");
5629 }
5630
5631 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
5632 {
5633         struct iwl_priv *priv = hw->priv;
5634
5635         IWL_DEBUG_MAC80211("enter\n");
5636
5637         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
5638                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
5639
5640         if (iwl3945_tx_skb(priv, skb))
5641                 dev_kfree_skb_any(skb);
5642
5643         IWL_DEBUG_MAC80211("leave\n");
5644         return NETDEV_TX_OK;
5645 }
5646
5647 static int iwl3945_mac_add_interface(struct ieee80211_hw *hw,
5648                                  struct ieee80211_if_init_conf *conf)
5649 {
5650         struct iwl_priv *priv = hw->priv;
5651         unsigned long flags;
5652
5653         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
5654
5655         if (priv->vif) {
5656                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
5657                 return -EOPNOTSUPP;
5658         }
5659
5660         spin_lock_irqsave(&priv->lock, flags);
5661         priv->vif = conf->vif;
5662         priv->iw_mode = conf->type;
5663
5664         spin_unlock_irqrestore(&priv->lock, flags);
5665
5666         mutex_lock(&priv->mutex);
5667
5668         if (conf->mac_addr) {
5669                 IWL_DEBUG_MAC80211("Set: %pM\n", conf->mac_addr);
5670                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
5671         }
5672
5673         if (iwl_is_ready(priv))
5674                 iwl3945_set_mode(priv, conf->type);
5675
5676         mutex_unlock(&priv->mutex);
5677
5678         IWL_DEBUG_MAC80211("leave\n");
5679         return 0;
5680 }
5681
5682 /**
5683  * iwl3945_mac_config - mac80211 config callback
5684  *
5685  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
5686  * be set inappropriately and the driver currently sets the hardware up to
5687  * use it whenever needed.
5688  */
5689 static int iwl3945_mac_config(struct ieee80211_hw *hw, u32 changed)
5690 {
5691         struct iwl_priv *priv = hw->priv;
5692         const struct iwl_channel_info *ch_info;
5693         struct ieee80211_conf *conf = &hw->conf;
5694         unsigned long flags;
5695         int ret = 0;
5696
5697         mutex_lock(&priv->mutex);
5698         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
5699
5700         if (!iwl_is_ready(priv)) {
5701                 IWL_DEBUG_MAC80211("leave - not ready\n");
5702                 ret = -EIO;
5703                 goto out;
5704         }
5705
5706         if (unlikely(!iwl3945_mod_params.disable_hw_scan &&
5707                      test_bit(STATUS_SCANNING, &priv->status))) {
5708                 IWL_DEBUG_MAC80211("leave - scanning\n");
5709                 set_bit(STATUS_CONF_PENDING, &priv->status);
5710                 mutex_unlock(&priv->mutex);
5711                 return 0;
5712         }
5713
5714         spin_lock_irqsave(&priv->lock, flags);
5715
5716         ch_info = iwl3945_get_channel_info(priv, conf->channel->band,
5717                                            conf->channel->hw_value);
5718         if (!is_channel_valid(ch_info)) {
5719                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this band.\n",
5720                                conf->channel->hw_value, conf->channel->band);
5721                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
5722                 spin_unlock_irqrestore(&priv->lock, flags);
5723                 ret = -EINVAL;
5724                 goto out;
5725         }
5726
5727         iwl3945_set_rxon_channel(priv, conf->channel->band, conf->channel->hw_value);
5728
5729         iwl3945_set_flags_for_phymode(priv, conf->channel->band);
5730
5731         /* The list of supported rates and rate mask can be different
5732          * for each phymode; since the phymode may have changed, reset
5733          * the rate mask to what mac80211 lists */
5734         iwl3945_set_rate(priv);
5735
5736         spin_unlock_irqrestore(&priv->lock, flags);
5737
5738 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
5739         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
5740                 iwl3945_hw_channel_switch(priv, conf->channel);
5741                 goto out;
5742         }
5743 #endif
5744
5745         iwl3945_radio_kill_sw(priv, !conf->radio_enabled);
5746
5747         if (!conf->radio_enabled) {
5748                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
5749                 goto out;
5750         }
5751
5752         if (iwl_is_rfkill(priv)) {
5753                 IWL_DEBUG_MAC80211("leave - RF kill\n");
5754                 ret = -EIO;
5755                 goto out;
5756         }
5757
5758         iwl3945_set_rate(priv);
5759
5760         if (memcmp(&priv->active39_rxon,
5761                    &priv->staging39_rxon, sizeof(priv->staging39_rxon)))
5762                 iwl3945_commit_rxon(priv);
5763         else
5764                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
5765
5766         IWL_DEBUG_MAC80211("leave\n");
5767
5768 out:
5769         clear_bit(STATUS_CONF_PENDING, &priv->status);
5770         mutex_unlock(&priv->mutex);
5771         return ret;
5772 }
5773
5774 static void iwl3945_config_ap(struct iwl_priv *priv)
5775 {
5776         int rc = 0;
5777
5778         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5779                 return;
5780
5781         /* The following should be done only at AP bring up */
5782         if (!(iwl3945_is_associated(priv))) {
5783
5784                 /* RXON - unassoc (to set timing command) */
5785                 priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5786                 iwl3945_commit_rxon(priv);
5787
5788                 /* RXON Timing */
5789                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
5790                 iwl3945_setup_rxon_timing(priv);
5791                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
5792                                       sizeof(priv->rxon_timing),
5793                                       &priv->rxon_timing);
5794                 if (rc)
5795                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
5796                                         "Attempting to continue.\n");
5797
5798                 /* FIXME: what should be the assoc_id for AP? */
5799                 priv->staging39_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
5800                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
5801                         priv->staging39_rxon.flags |=
5802                                 RXON_FLG_SHORT_PREAMBLE_MSK;
5803                 else
5804                         priv->staging39_rxon.flags &=
5805                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
5806
5807                 if (priv->staging39_rxon.flags & RXON_FLG_BAND_24G_MSK) {
5808                         if (priv->assoc_capability &
5809                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
5810                                 priv->staging39_rxon.flags |=
5811                                         RXON_FLG_SHORT_SLOT_MSK;
5812                         else
5813                                 priv->staging39_rxon.flags &=
5814                                         ~RXON_FLG_SHORT_SLOT_MSK;
5815
5816                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
5817                                 priv->staging39_rxon.flags &=
5818                                         ~RXON_FLG_SHORT_SLOT_MSK;
5819                 }
5820                 /* restore RXON assoc */
5821                 priv->staging39_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
5822                 iwl3945_commit_rxon(priv);
5823                 iwl3945_add_station(priv, iwl_bcast_addr, 0, 0);
5824         }
5825         iwl3945_send_beacon_cmd(priv);
5826
5827         /* FIXME - we need to add code here to detect a totally new
5828          * configuration, reset the AP, unassoc, rxon timing, assoc,
5829          * clear sta table, add BCAST sta... */
5830 }
5831
5832 static int iwl3945_mac_config_interface(struct ieee80211_hw *hw,
5833                                         struct ieee80211_vif *vif,
5834                                         struct ieee80211_if_conf *conf)
5835 {
5836         struct iwl_priv *priv = hw->priv;
5837         int rc;
5838
5839         if (conf == NULL)
5840                 return -EIO;
5841
5842         if (priv->vif != vif) {
5843                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
5844                 return 0;
5845         }
5846
5847         /* handle this temporarily here */
5848         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
5849             conf->changed & IEEE80211_IFCC_BEACON) {
5850                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
5851                 if (!beacon)
5852                         return -ENOMEM;
5853                 mutex_lock(&priv->mutex);
5854                 rc = iwl3945_mac_beacon_update(hw, beacon);
5855                 mutex_unlock(&priv->mutex);
5856                 if (rc)
5857                         return rc;
5858         }
5859
5860         if (!iwl_is_alive(priv))
5861                 return -EAGAIN;
5862
5863         mutex_lock(&priv->mutex);
5864
5865         if (conf->bssid)
5866                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
5867
5868 /*
5869  * very dubious code was here; the probe filtering flag is never set:
5870  *
5871         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
5872             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
5873  */
5874
5875         if (priv->iw_mode == NL80211_IFTYPE_AP) {
5876                 if (!conf->bssid) {
5877                         conf->bssid = priv->mac_addr;
5878                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
5879                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
5880                                            conf->bssid);
5881                 }
5882                 if (priv->ibss_beacon)
5883                         dev_kfree_skb(priv->ibss_beacon);
5884
5885                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
5886         }
5887
5888         if (iwl_is_rfkill(priv))
5889                 goto done;
5890
5891         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
5892             !is_multicast_ether_addr(conf->bssid)) {
5893                 /* If there is currently a HW scan going on in the background
5894                  * then we need to cancel it else the RXON below will fail. */
5895                 if (iwl_scan_cancel_timeout(priv, 100)) {
5896                         IWL_WARN(priv, "Aborted scan still in progress "
5897                                     "after 100ms\n");
5898                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
5899                         mutex_unlock(&priv->mutex);
5900                         return -EAGAIN;
5901                 }
5902                 memcpy(priv->staging39_rxon.bssid_addr, conf->bssid, ETH_ALEN);
5903
5904                 /* TODO: Audit driver for usage of these members and see
5905                  * if mac80211 deprecates them (priv->bssid looks like it
5906                  * shouldn't be there, but I haven't scanned the IBSS code
5907                  * to verify) - jpk */
5908                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
5909
5910                 if (priv->iw_mode == NL80211_IFTYPE_AP)
5911                         iwl3945_config_ap(priv);
5912                 else {
5913                         rc = iwl3945_commit_rxon(priv);
5914                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
5915                                 iwl3945_add_station(priv,
5916                                         priv->active39_rxon.bssid_addr, 1, 0);
5917                 }
5918
5919         } else {
5920                 iwl_scan_cancel_timeout(priv, 100);
5921                 priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5922                 iwl3945_commit_rxon(priv);
5923         }
5924
5925  done:
5926         IWL_DEBUG_MAC80211("leave\n");
5927         mutex_unlock(&priv->mutex);
5928
5929         return 0;
5930 }
5931
5932 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
5933                                  unsigned int changed_flags,
5934                                  unsigned int *total_flags,
5935                                  int mc_count, struct dev_addr_list *mc_list)
5936 {
5937         struct iwl_priv *priv = hw->priv;
5938         __le32 *filter_flags = &priv->staging39_rxon.filter_flags;
5939
5940         IWL_DEBUG_MAC80211("Enter: changed: 0x%x, total: 0x%x\n",
5941                         changed_flags, *total_flags);
5942
5943         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
5944                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
5945                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
5946                 else
5947                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
5948         }
5949         if (changed_flags & FIF_ALLMULTI) {
5950                 if (*total_flags & FIF_ALLMULTI)
5951                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
5952                 else
5953                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
5954         }
5955         if (changed_flags & FIF_CONTROL) {
5956                 if (*total_flags & FIF_CONTROL)
5957                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
5958                 else
5959                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
5960         }
5961         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5962                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
5963                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
5964                 else
5965                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
5966         }
5967
5968         /* We avoid iwl_commit_rxon here to commit the new filter flags
5969          * since mac80211 will call ieee80211_hw_config immediately.
5970          * (mc_list is not supported at this time). Otherwise, we need to
5971          * queue a background iwl_commit_rxon work.
5972          */
5973
5974         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
5975                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
5976 }
5977
5978 static void iwl3945_mac_remove_interface(struct ieee80211_hw *hw,
5979                                      struct ieee80211_if_init_conf *conf)
5980 {
5981         struct iwl_priv *priv = hw->priv;
5982
5983         IWL_DEBUG_MAC80211("enter\n");
5984
5985         mutex_lock(&priv->mutex);
5986
5987         if (iwl_is_ready_rf(priv)) {
5988                 iwl_scan_cancel_timeout(priv, 100);
5989                 priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5990                 iwl3945_commit_rxon(priv);
5991         }
5992         if (priv->vif == conf->vif) {
5993                 priv->vif = NULL;
5994                 memset(priv->bssid, 0, ETH_ALEN);
5995         }
5996         mutex_unlock(&priv->mutex);
5997
5998         IWL_DEBUG_MAC80211("leave\n");
5999 }
6000
6001 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6002
6003 static void iwl3945_bss_info_changed(struct ieee80211_hw *hw,
6004                                      struct ieee80211_vif *vif,
6005                                      struct ieee80211_bss_conf *bss_conf,
6006                                      u32 changes)
6007 {
6008         struct iwl_priv *priv = hw->priv;
6009
6010         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6011
6012         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6013                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6014                                    bss_conf->use_short_preamble);
6015                 if (bss_conf->use_short_preamble)
6016                         priv->staging39_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6017                 else
6018                         priv->staging39_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6019         }
6020
6021         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6022                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6023                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6024                         priv->staging39_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6025                 else
6026                         priv->staging39_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6027         }
6028
6029         if (changes & BSS_CHANGED_ASSOC) {
6030                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6031                 /* This should never happen as this function should
6032                  * never be called from interrupt context. */
6033                 if (WARN_ON_ONCE(in_interrupt()))
6034                         return;
6035                 if (bss_conf->assoc) {
6036                         priv->assoc_id = bss_conf->aid;
6037                         priv->beacon_int = bss_conf->beacon_int;
6038                         priv->timestamp = bss_conf->timestamp;
6039                         priv->assoc_capability = bss_conf->assoc_capability;
6040                         priv->power_data.dtim_period = bss_conf->dtim_period;
6041                         priv->next_scan_jiffies = jiffies +
6042                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6043                         mutex_lock(&priv->mutex);
6044                         iwl3945_post_associate(priv);
6045                         mutex_unlock(&priv->mutex);
6046                 } else {
6047                         priv->assoc_id = 0;
6048                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6049                 }
6050         } else if (changes && iwl3945_is_associated(priv) && priv->assoc_id) {
6051                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6052                         iwl3945_send_rxon_assoc(priv);
6053         }
6054
6055 }
6056
6057 static int iwl3945_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6058 {
6059         int rc = 0;
6060         unsigned long flags;
6061         struct iwl_priv *priv = hw->priv;
6062         DECLARE_SSID_BUF(ssid_buf);
6063
6064         IWL_DEBUG_MAC80211("enter\n");
6065
6066         mutex_lock(&priv->mutex);
6067         spin_lock_irqsave(&priv->lock, flags);
6068
6069         if (!iwl_is_ready_rf(priv)) {
6070                 rc = -EIO;
6071                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6072                 goto out_unlock;
6073         }
6074
6075         /* we don't schedule scan within next_scan_jiffies period */
6076         if (priv->next_scan_jiffies &&
6077                         time_after(priv->next_scan_jiffies, jiffies)) {
6078                 rc = -EAGAIN;
6079                 goto out_unlock;
6080         }
6081         /* if we just finished scan ask for delay for a broadcast scan */
6082         if ((len == 0) && priv->last_scan_jiffies &&
6083             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
6084                        jiffies)) {
6085                 rc = -EAGAIN;
6086                 goto out_unlock;
6087         }
6088         if (len) {
6089                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6090                                print_ssid(ssid_buf, ssid, len), (int)len);
6091
6092                 priv->one_direct_scan = 1;
6093                 priv->direct_ssid_len = (u8)
6094                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6095                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6096         } else
6097                 priv->one_direct_scan = 0;
6098
6099         rc = iwl3945_scan_initiate(priv);
6100
6101         IWL_DEBUG_MAC80211("leave\n");
6102
6103 out_unlock:
6104         spin_unlock_irqrestore(&priv->lock, flags);
6105         mutex_unlock(&priv->mutex);
6106
6107         return rc;
6108 }
6109
6110 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6111                                struct ieee80211_vif *vif,
6112                                struct ieee80211_sta *sta,
6113                                struct ieee80211_key_conf *key)
6114 {
6115         struct iwl_priv *priv = hw->priv;
6116         const u8 *addr;
6117         int ret;
6118         u8 sta_id;
6119
6120         IWL_DEBUG_MAC80211("enter\n");
6121
6122         if (iwl3945_mod_params.sw_crypto) {
6123                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6124                 return -EOPNOTSUPP;
6125         }
6126
6127         addr = sta ? sta->addr : iwl_bcast_addr;
6128         sta_id = iwl3945_hw_find_station(priv, addr);
6129         if (sta_id == IWL_INVALID_STATION) {
6130                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
6131                                    addr);
6132                 return -EINVAL;
6133         }
6134
6135         mutex_lock(&priv->mutex);
6136
6137         iwl_scan_cancel_timeout(priv, 100);
6138
6139         switch (cmd) {
6140         case  SET_KEY:
6141                 ret = iwl3945_update_sta_key_info(priv, key, sta_id);
6142                 if (!ret) {
6143                         iwl3945_set_rxon_hwcrypto(priv, 1);
6144                         iwl3945_commit_rxon(priv);
6145                         key->hw_key_idx = sta_id;
6146                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
6147                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
6148                 }
6149                 break;
6150         case DISABLE_KEY:
6151                 ret = iwl3945_clear_sta_key_info(priv, sta_id);
6152                 if (!ret) {
6153                         iwl3945_set_rxon_hwcrypto(priv, 0);
6154                         iwl3945_commit_rxon(priv);
6155                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
6156                 }
6157                 break;
6158         default:
6159                 ret = -EINVAL;
6160         }
6161
6162         IWL_DEBUG_MAC80211("leave\n");
6163         mutex_unlock(&priv->mutex);
6164
6165         return ret;
6166 }
6167
6168 static int iwl3945_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
6169                            const struct ieee80211_tx_queue_params *params)
6170 {
6171         struct iwl_priv *priv = hw->priv;
6172         unsigned long flags;
6173         int q;
6174
6175         IWL_DEBUG_MAC80211("enter\n");
6176
6177         if (!iwl_is_ready_rf(priv)) {
6178                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6179                 return -EIO;
6180         }
6181
6182         if (queue >= AC_NUM) {
6183                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
6184                 return 0;
6185         }
6186
6187         q = AC_NUM - 1 - queue;
6188
6189         spin_lock_irqsave(&priv->lock, flags);
6190
6191         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
6192         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
6193         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
6194         priv->qos_data.def_qos_parm.ac[q].edca_txop =
6195                         cpu_to_le16((params->txop * 32));
6196
6197         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
6198         priv->qos_data.qos_active = 1;
6199
6200         spin_unlock_irqrestore(&priv->lock, flags);
6201
6202         mutex_lock(&priv->mutex);
6203         if (priv->iw_mode == NL80211_IFTYPE_AP)
6204                 iwl3945_activate_qos(priv, 1);
6205         else if (priv->assoc_id && iwl3945_is_associated(priv))
6206                 iwl3945_activate_qos(priv, 0);
6207
6208         mutex_unlock(&priv->mutex);
6209
6210         IWL_DEBUG_MAC80211("leave\n");
6211         return 0;
6212 }
6213
6214 static int iwl3945_mac_get_tx_stats(struct ieee80211_hw *hw,
6215                                 struct ieee80211_tx_queue_stats *stats)
6216 {
6217         struct iwl_priv *priv = hw->priv;
6218         int i, avail;
6219         struct iwl_tx_queue *txq;
6220         struct iwl_queue *q;
6221         unsigned long flags;
6222
6223         IWL_DEBUG_MAC80211("enter\n");
6224
6225         if (!iwl_is_ready_rf(priv)) {
6226                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6227                 return -EIO;
6228         }
6229
6230         spin_lock_irqsave(&priv->lock, flags);
6231
6232         for (i = 0; i < AC_NUM; i++) {
6233                 txq = &priv->txq[i];
6234                 q = &txq->q;
6235                 avail = iwl_queue_space(q);
6236
6237                 stats[i].len = q->n_window - avail;
6238                 stats[i].limit = q->n_window - q->high_mark;
6239                 stats[i].count = q->n_window;
6240
6241         }
6242         spin_unlock_irqrestore(&priv->lock, flags);
6243
6244         IWL_DEBUG_MAC80211("leave\n");
6245
6246         return 0;
6247 }
6248
6249 static void iwl3945_mac_reset_tsf(struct ieee80211_hw *hw)
6250 {
6251         struct iwl_priv *priv = hw->priv;
6252         unsigned long flags;
6253
6254         mutex_lock(&priv->mutex);
6255         IWL_DEBUG_MAC80211("enter\n");
6256
6257         iwl_reset_qos(priv);
6258
6259         spin_lock_irqsave(&priv->lock, flags);
6260         priv->assoc_id = 0;
6261         priv->assoc_capability = 0;
6262
6263         /* new association get rid of ibss beacon skb */
6264         if (priv->ibss_beacon)
6265                 dev_kfree_skb(priv->ibss_beacon);
6266
6267         priv->ibss_beacon = NULL;
6268
6269         priv->beacon_int = priv->hw->conf.beacon_int;
6270         priv->timestamp = 0;
6271         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
6272                 priv->beacon_int = 0;
6273
6274         spin_unlock_irqrestore(&priv->lock, flags);
6275
6276         if (!iwl_is_ready_rf(priv)) {
6277                 IWL_DEBUG_MAC80211("leave - not ready\n");
6278                 mutex_unlock(&priv->mutex);
6279                 return;
6280         }
6281
6282         /* we are restarting association process
6283          * clear RXON_FILTER_ASSOC_MSK bit
6284         */
6285         if (priv->iw_mode != NL80211_IFTYPE_AP) {
6286                 iwl_scan_cancel_timeout(priv, 100);
6287                 priv->staging39_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6288                 iwl3945_commit_rxon(priv);
6289         }
6290
6291         /* Per mac80211.h: This is only used in IBSS mode... */
6292         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
6293
6294                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
6295                 mutex_unlock(&priv->mutex);
6296                 return;
6297         }
6298
6299         iwl3945_set_rate(priv);
6300
6301         mutex_unlock(&priv->mutex);
6302
6303         IWL_DEBUG_MAC80211("leave\n");
6304
6305 }
6306
6307 static int iwl3945_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
6308 {
6309         struct iwl_priv *priv = hw->priv;
6310         unsigned long flags;
6311
6312         IWL_DEBUG_MAC80211("enter\n");
6313
6314         if (!iwl_is_ready_rf(priv)) {
6315                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
6316                 return -EIO;
6317         }
6318
6319         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
6320                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
6321                 return -EIO;
6322         }
6323
6324         spin_lock_irqsave(&priv->lock, flags);
6325
6326         if (priv->ibss_beacon)
6327                 dev_kfree_skb(priv->ibss_beacon);
6328
6329         priv->ibss_beacon = skb;
6330
6331         priv->assoc_id = 0;
6332
6333         IWL_DEBUG_MAC80211("leave\n");
6334         spin_unlock_irqrestore(&priv->lock, flags);
6335
6336         iwl_reset_qos(priv);
6337
6338         iwl3945_post_associate(priv);
6339
6340
6341         return 0;
6342 }
6343
6344 /*****************************************************************************
6345  *
6346  * sysfs attributes
6347  *
6348  *****************************************************************************/
6349
6350 #ifdef CONFIG_IWL3945_DEBUG
6351
6352 /*
6353  * The following adds a new attribute to the sysfs representation
6354  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
6355  * used for controlling the debug level.
6356  *
6357  * See the level definitions in iwl for details.
6358  */
6359 static ssize_t show_debug_level(struct device *d,
6360                                 struct device_attribute *attr, char *buf)
6361 {
6362         struct iwl_priv *priv = d->driver_data;
6363
6364         return sprintf(buf, "0x%08X\n", priv->debug_level);
6365 }
6366 static ssize_t store_debug_level(struct device *d,
6367                                 struct device_attribute *attr,
6368                                  const char *buf, size_t count)
6369 {
6370         struct iwl_priv *priv = d->driver_data;
6371         unsigned long val;
6372         int ret;
6373
6374         ret = strict_strtoul(buf, 0, &val);
6375         if (ret)
6376                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
6377         else
6378                 priv->debug_level = val;
6379
6380         return strnlen(buf, count);
6381 }
6382
6383 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
6384                         show_debug_level, store_debug_level);
6385
6386 #endif /* CONFIG_IWL3945_DEBUG */
6387
6388 static ssize_t show_temperature(struct device *d,
6389                                 struct device_attribute *attr, char *buf)
6390 {
6391         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6392
6393         if (!iwl_is_alive(priv))
6394                 return -EAGAIN;
6395
6396         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
6397 }
6398
6399 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
6400
6401 static ssize_t show_tx_power(struct device *d,
6402                              struct device_attribute *attr, char *buf)
6403 {
6404         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6405         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
6406 }
6407
6408 static ssize_t store_tx_power(struct device *d,
6409                               struct device_attribute *attr,
6410                               const char *buf, size_t count)
6411 {
6412         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6413         char *p = (char *)buf;
6414         u32 val;
6415
6416         val = simple_strtoul(p, &p, 10);
6417         if (p == buf)
6418                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
6419         else
6420                 iwl3945_hw_reg_set_txpower(priv, val);
6421
6422         return count;
6423 }
6424
6425 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
6426
6427 static ssize_t show_flags(struct device *d,
6428                           struct device_attribute *attr, char *buf)
6429 {
6430         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6431
6432         return sprintf(buf, "0x%04X\n", priv->active39_rxon.flags);
6433 }
6434
6435 static ssize_t store_flags(struct device *d,
6436                            struct device_attribute *attr,
6437                            const char *buf, size_t count)
6438 {
6439         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6440         u32 flags = simple_strtoul(buf, NULL, 0);
6441
6442         mutex_lock(&priv->mutex);
6443         if (le32_to_cpu(priv->staging39_rxon.flags) != flags) {
6444                 /* Cancel any currently running scans... */
6445                 if (iwl_scan_cancel_timeout(priv, 100))
6446                         IWL_WARN(priv, "Could not cancel scan.\n");
6447                 else {
6448                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
6449                                        flags);
6450                         priv->staging39_rxon.flags = cpu_to_le32(flags);
6451                         iwl3945_commit_rxon(priv);
6452                 }
6453         }
6454         mutex_unlock(&priv->mutex);
6455
6456         return count;
6457 }
6458
6459 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
6460
6461 static ssize_t show_filter_flags(struct device *d,
6462                                  struct device_attribute *attr, char *buf)
6463 {
6464         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6465
6466         return sprintf(buf, "0x%04X\n",
6467                 le32_to_cpu(priv->active39_rxon.filter_flags));
6468 }
6469
6470 static ssize_t store_filter_flags(struct device *d,
6471                                   struct device_attribute *attr,
6472                                   const char *buf, size_t count)
6473 {
6474         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6475         u32 filter_flags = simple_strtoul(buf, NULL, 0);
6476
6477         mutex_lock(&priv->mutex);
6478         if (le32_to_cpu(priv->staging39_rxon.filter_flags) != filter_flags) {
6479                 /* Cancel any currently running scans... */
6480                 if (iwl_scan_cancel_timeout(priv, 100))
6481                         IWL_WARN(priv, "Could not cancel scan.\n");
6482                 else {
6483                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
6484                                        "0x%04X\n", filter_flags);
6485                         priv->staging39_rxon.filter_flags =
6486                                 cpu_to_le32(filter_flags);
6487                         iwl3945_commit_rxon(priv);
6488                 }
6489         }
6490         mutex_unlock(&priv->mutex);
6491
6492         return count;
6493 }
6494
6495 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
6496                    store_filter_flags);
6497
6498 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
6499
6500 static ssize_t show_measurement(struct device *d,
6501                                 struct device_attribute *attr, char *buf)
6502 {
6503         struct iwl_priv *priv = dev_get_drvdata(d);
6504         struct iwl_spectrum_notification measure_report;
6505         u32 size = sizeof(measure_report), len = 0, ofs = 0;
6506         u8 *data = (u8 *)&measure_report;
6507         unsigned long flags;
6508
6509         spin_lock_irqsave(&priv->lock, flags);
6510         if (!(priv->measurement_status & MEASUREMENT_READY)) {
6511                 spin_unlock_irqrestore(&priv->lock, flags);
6512                 return 0;
6513         }
6514         memcpy(&measure_report, &priv->measure_report, size);
6515         priv->measurement_status = 0;
6516         spin_unlock_irqrestore(&priv->lock, flags);
6517
6518         while (size && (PAGE_SIZE - len)) {
6519                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6520                                    PAGE_SIZE - len, 1);
6521                 len = strlen(buf);
6522                 if (PAGE_SIZE - len)
6523                         buf[len++] = '\n';
6524
6525                 ofs += 16;
6526                 size -= min(size, 16U);
6527         }
6528
6529         return len;
6530 }
6531
6532 static ssize_t store_measurement(struct device *d,
6533                                  struct device_attribute *attr,
6534                                  const char *buf, size_t count)
6535 {
6536         struct iwl_priv *priv = dev_get_drvdata(d);
6537         struct ieee80211_measurement_params params = {
6538                 .channel = le16_to_cpu(priv->active39_rxon.channel),
6539                 .start_time = cpu_to_le64(priv->last_tsf),
6540                 .duration = cpu_to_le16(1),
6541         };
6542         u8 type = IWL_MEASURE_BASIC;
6543         u8 buffer[32];
6544         u8 channel;
6545
6546         if (count) {
6547                 char *p = buffer;
6548                 strncpy(buffer, buf, min(sizeof(buffer), count));
6549                 channel = simple_strtoul(p, NULL, 0);
6550                 if (channel)
6551                         params.channel = channel;
6552
6553                 p = buffer;
6554                 while (*p && *p != ' ')
6555                         p++;
6556                 if (*p)
6557                         type = simple_strtoul(p + 1, NULL, 0);
6558         }
6559
6560         IWL_DEBUG_INFO("Invoking measurement of type %d on "
6561                        "channel %d (for '%s')\n", type, params.channel, buf);
6562         iwl3945_get_measurement(priv, &params, type);
6563
6564         return count;
6565 }
6566
6567 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
6568                    show_measurement, store_measurement);
6569 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
6570
6571 static ssize_t store_retry_rate(struct device *d,
6572                                 struct device_attribute *attr,
6573                                 const char *buf, size_t count)
6574 {
6575         struct iwl_priv *priv = dev_get_drvdata(d);
6576
6577         priv->retry_rate = simple_strtoul(buf, NULL, 0);
6578         if (priv->retry_rate <= 0)
6579                 priv->retry_rate = 1;
6580
6581         return count;
6582 }
6583
6584 static ssize_t show_retry_rate(struct device *d,
6585                                struct device_attribute *attr, char *buf)
6586 {
6587         struct iwl_priv *priv = dev_get_drvdata(d);
6588         return sprintf(buf, "%d", priv->retry_rate);
6589 }
6590
6591 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
6592                    store_retry_rate);
6593
6594 static ssize_t store_power_level(struct device *d,
6595                                  struct device_attribute *attr,
6596                                  const char *buf, size_t count)
6597 {
6598         struct iwl_priv *priv = dev_get_drvdata(d);
6599         int rc;
6600         int mode;
6601
6602         mode = simple_strtoul(buf, NULL, 0);
6603         mutex_lock(&priv->mutex);
6604
6605         if (!iwl_is_ready(priv)) {
6606                 rc = -EAGAIN;
6607                 goto out;
6608         }
6609
6610         if ((mode < 1) || (mode > IWL39_POWER_LIMIT) ||
6611             (mode == IWL39_POWER_AC))
6612                 mode = IWL39_POWER_AC;
6613         else
6614                 mode |= IWL_POWER_ENABLED;
6615
6616         if (mode != priv->power_mode) {
6617                 rc = iwl3945_send_power_mode(priv, IWL_POWER_LEVEL(mode));
6618                 if (rc) {
6619                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
6620                         goto out;
6621                 }
6622                 priv->power_mode = mode;
6623         }
6624
6625         rc = count;
6626
6627  out:
6628         mutex_unlock(&priv->mutex);
6629         return rc;
6630 }
6631
6632 #define MAX_WX_STRING 80
6633
6634 /* Values are in microsecond */
6635 static const s32 timeout_duration[] = {
6636         350000,
6637         250000,
6638         75000,
6639         37000,
6640         25000,
6641 };
6642 static const s32 period_duration[] = {
6643         400000,
6644         700000,
6645         1000000,
6646         1000000,
6647         1000000
6648 };
6649
6650 static ssize_t show_power_level(struct device *d,
6651                                 struct device_attribute *attr, char *buf)
6652 {
6653         struct iwl_priv *priv = dev_get_drvdata(d);
6654         int level = IWL_POWER_LEVEL(priv->power_mode);
6655         char *p = buf;
6656
6657         p += sprintf(p, "%d ", level);
6658         switch (level) {
6659         case IWL_POWER_MODE_CAM:
6660         case IWL39_POWER_AC:
6661                 p += sprintf(p, "(AC)");
6662                 break;
6663         case IWL39_POWER_BATTERY:
6664                 p += sprintf(p, "(BATTERY)");
6665                 break;
6666         default:
6667                 p += sprintf(p,
6668                              "(Timeout %dms, Period %dms)",
6669                              timeout_duration[level - 1] / 1000,
6670                              period_duration[level - 1] / 1000);
6671         }
6672
6673         if (!(priv->power_mode & IWL_POWER_ENABLED))
6674                 p += sprintf(p, " OFF\n");
6675         else
6676                 p += sprintf(p, " \n");
6677
6678         return p - buf + 1;
6679
6680 }
6681
6682 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
6683                    store_power_level);
6684
6685 static ssize_t show_channels(struct device *d,
6686                              struct device_attribute *attr, char *buf)
6687 {
6688         /* all this shit doesn't belong into sysfs anyway */
6689         return 0;
6690 }
6691
6692 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
6693
6694 static ssize_t show_statistics(struct device *d,
6695                                struct device_attribute *attr, char *buf)
6696 {
6697         struct iwl_priv *priv = dev_get_drvdata(d);
6698         u32 size = sizeof(struct iwl3945_notif_statistics);
6699         u32 len = 0, ofs = 0;
6700         u8 *data = (u8 *)&priv->statistics_39;
6701         int rc = 0;
6702
6703         if (!iwl_is_alive(priv))
6704                 return -EAGAIN;
6705
6706         mutex_lock(&priv->mutex);
6707         rc = iwl3945_send_statistics_request(priv);
6708         mutex_unlock(&priv->mutex);
6709
6710         if (rc) {
6711                 len = sprintf(buf,
6712                               "Error sending statistics request: 0x%08X\n", rc);
6713                 return len;
6714         }
6715
6716         while (size && (PAGE_SIZE - len)) {
6717                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
6718                                    PAGE_SIZE - len, 1);
6719                 len = strlen(buf);
6720                 if (PAGE_SIZE - len)
6721                         buf[len++] = '\n';
6722
6723                 ofs += 16;
6724                 size -= min(size, 16U);
6725         }
6726
6727         return len;
6728 }
6729
6730 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
6731
6732 static ssize_t show_antenna(struct device *d,
6733                             struct device_attribute *attr, char *buf)
6734 {
6735         struct iwl_priv *priv = dev_get_drvdata(d);
6736
6737         if (!iwl_is_alive(priv))
6738                 return -EAGAIN;
6739
6740         return sprintf(buf, "%d\n", priv->antenna);
6741 }
6742
6743 static ssize_t store_antenna(struct device *d,
6744                              struct device_attribute *attr,
6745                              const char *buf, size_t count)
6746 {
6747         int ant;
6748         struct iwl_priv *priv = dev_get_drvdata(d);
6749
6750         if (count == 0)
6751                 return 0;
6752
6753         if (sscanf(buf, "%1i", &ant) != 1) {
6754                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
6755                 return count;
6756         }
6757
6758         if ((ant >= 0) && (ant <= 2)) {
6759                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
6760                 priv->antenna = (enum iwl3945_antenna)ant;
6761         } else
6762                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
6763
6764
6765         return count;
6766 }
6767
6768 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
6769
6770 static ssize_t show_status(struct device *d,
6771                            struct device_attribute *attr, char *buf)
6772 {
6773         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
6774         if (!iwl_is_alive(priv))
6775                 return -EAGAIN;
6776         return sprintf(buf, "0x%08x\n", (int)priv->status);
6777 }
6778
6779 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
6780
6781 static ssize_t dump_error_log(struct device *d,
6782                               struct device_attribute *attr,
6783                               const char *buf, size_t count)
6784 {
6785         char *p = (char *)buf;
6786
6787         if (p[0] == '1')
6788                 iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data);
6789
6790         return strnlen(buf, count);
6791 }
6792
6793 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
6794
6795 static ssize_t dump_event_log(struct device *d,
6796                               struct device_attribute *attr,
6797                               const char *buf, size_t count)
6798 {
6799         char *p = (char *)buf;
6800
6801         if (p[0] == '1')
6802                 iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data);
6803
6804         return strnlen(buf, count);
6805 }
6806
6807 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
6808
6809 /*****************************************************************************
6810  *
6811  * driver setup and tear down
6812  *
6813  *****************************************************************************/
6814
6815 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
6816 {
6817         priv->workqueue = create_workqueue(DRV_NAME);
6818
6819         init_waitqueue_head(&priv->wait_command_queue);
6820
6821         INIT_WORK(&priv->up, iwl3945_bg_up);
6822         INIT_WORK(&priv->restart, iwl3945_bg_restart);
6823         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
6824         INIT_WORK(&priv->scan_completed, iwl3945_bg_scan_completed);
6825         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
6826         INIT_WORK(&priv->abort_scan, iwl3945_bg_abort_scan);
6827         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
6828         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
6829         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
6830         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
6831         INIT_DELAYED_WORK(&priv->scan_check, iwl3945_bg_scan_check);
6832         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
6833
6834         iwl3945_hw_setup_deferred_work(priv);
6835
6836         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
6837                      iwl3945_irq_tasklet, (unsigned long)priv);
6838 }
6839
6840 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
6841 {
6842         iwl3945_hw_cancel_deferred_work(priv);
6843
6844         cancel_delayed_work_sync(&priv->init_alive_start);
6845         cancel_delayed_work(&priv->scan_check);
6846         cancel_delayed_work(&priv->alive_start);
6847         cancel_work_sync(&priv->beacon_update);
6848 }
6849
6850 static struct attribute *iwl3945_sysfs_entries[] = {
6851         &dev_attr_antenna.attr,
6852         &dev_attr_channels.attr,
6853         &dev_attr_dump_errors.attr,
6854         &dev_attr_dump_events.attr,
6855         &dev_attr_flags.attr,
6856         &dev_attr_filter_flags.attr,
6857 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
6858         &dev_attr_measurement.attr,
6859 #endif
6860         &dev_attr_power_level.attr,
6861         &dev_attr_retry_rate.attr,
6862         &dev_attr_statistics.attr,
6863         &dev_attr_status.attr,
6864         &dev_attr_temperature.attr,
6865         &dev_attr_tx_power.attr,
6866 #ifdef CONFIG_IWL3945_DEBUG
6867         &dev_attr_debug_level.attr,
6868 #endif
6869         NULL
6870 };
6871
6872 static struct attribute_group iwl3945_attribute_group = {
6873         .name = NULL,           /* put in device directory */
6874         .attrs = iwl3945_sysfs_entries,
6875 };
6876
6877 static struct ieee80211_ops iwl3945_hw_ops = {
6878         .tx = iwl3945_mac_tx,
6879         .start = iwl3945_mac_start,
6880         .stop = iwl3945_mac_stop,
6881         .add_interface = iwl3945_mac_add_interface,
6882         .remove_interface = iwl3945_mac_remove_interface,
6883         .config = iwl3945_mac_config,
6884         .config_interface = iwl3945_mac_config_interface,
6885         .configure_filter = iwl3945_configure_filter,
6886         .set_key = iwl3945_mac_set_key,
6887         .get_tx_stats = iwl3945_mac_get_tx_stats,
6888         .conf_tx = iwl3945_mac_conf_tx,
6889         .reset_tsf = iwl3945_mac_reset_tsf,
6890         .bss_info_changed = iwl3945_bss_info_changed,
6891         .hw_scan = iwl3945_mac_hw_scan
6892 };
6893
6894 static int iwl3945_init_drv(struct iwl_priv *priv)
6895 {
6896         int ret;
6897
6898         priv->retry_rate = 1;
6899         priv->ibss_beacon = NULL;
6900
6901         spin_lock_init(&priv->lock);
6902         spin_lock_init(&priv->power_data.lock);
6903         spin_lock_init(&priv->sta_lock);
6904         spin_lock_init(&priv->hcmd_lock);
6905
6906         INIT_LIST_HEAD(&priv->free_frames);
6907
6908         mutex_init(&priv->mutex);
6909
6910         /* Clear the driver's (not device's) station table */
6911         iwl3945_clear_stations_table(priv);
6912
6913         priv->data_retry_limit = -1;
6914         priv->ieee_channels = NULL;
6915         priv->ieee_rates = NULL;
6916         priv->band = IEEE80211_BAND_2GHZ;
6917
6918         priv->iw_mode = NL80211_IFTYPE_STATION;
6919
6920         iwl_reset_qos(priv);
6921
6922         priv->qos_data.qos_active = 0;
6923         priv->qos_data.qos_cap.val = 0;
6924
6925         priv->rates_mask = IWL_RATES_MASK;
6926         /* If power management is turned on, default to AC mode */
6927         priv->power_mode = IWL39_POWER_AC;
6928         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
6929
6930         ret = iwl3945_init_channel_map(priv);
6931         if (ret) {
6932                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
6933                 goto err;
6934         }
6935
6936         ret = iwl3945_init_geos(priv);
6937         if (ret) {
6938                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
6939                 goto err_free_channel_map;
6940         }
6941
6942         return 0;
6943
6944 err_free_channel_map:
6945         iwl3945_free_channel_map(priv);
6946 err:
6947         return ret;
6948 }
6949
6950 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6951 {
6952         int err = 0;
6953         struct iwl_priv *priv;
6954         struct ieee80211_hw *hw;
6955         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
6956         unsigned long flags;
6957
6958         /***********************
6959          * 1. Allocating HW data
6960          * ********************/
6961
6962         /* mac80211 allocates memory for this device instance, including
6963          *   space for this driver's private structure */
6964         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
6965         if (hw == NULL) {
6966                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
6967                 err = -ENOMEM;
6968                 goto out;
6969         }
6970         priv = hw->priv;
6971         SET_IEEE80211_DEV(hw, &pdev->dev);
6972
6973         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
6974              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
6975                 IWL_ERR(priv,
6976                         "invalid queues_num, should be between %d and %d\n",
6977                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
6978                 err = -EINVAL;
6979                 goto out;
6980         }
6981
6982         /*
6983          * Disabling hardware scan means that mac80211 will perform scans
6984          * "the hard way", rather than using device's scan.
6985          */
6986         if (iwl3945_mod_params.disable_hw_scan) {
6987                 IWL_DEBUG_INFO("Disabling hw_scan\n");
6988                 iwl3945_hw_ops.hw_scan = NULL;
6989         }
6990
6991
6992         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
6993         priv->cfg = cfg;
6994         priv->pci_dev = pdev;
6995
6996 #ifdef CONFIG_IWL3945_DEBUG
6997         priv->debug_level = iwl3945_mod_params.debug;
6998         atomic_set(&priv->restrict_refcnt, 0);
6999 #endif
7000         hw->rate_control_algorithm = "iwl-3945-rs";
7001         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
7002
7003         /* Select antenna (may be helpful if only one antenna is connected) */
7004         priv->antenna = (enum iwl3945_antenna)iwl3945_mod_params.antenna;
7005
7006         /* Tell mac80211 our characteristics */
7007         hw->flags = IEEE80211_HW_SIGNAL_DBM |
7008                     IEEE80211_HW_NOISE_DBM;
7009
7010         hw->wiphy->interface_modes =
7011                 BIT(NL80211_IFTYPE_STATION) |
7012                 BIT(NL80211_IFTYPE_ADHOC);
7013
7014         hw->wiphy->custom_regulatory = true;
7015
7016         /* 4 EDCA QOS priorities */
7017         hw->queues = 4;
7018
7019         /***************************
7020          * 2. Initializing PCI bus
7021          * *************************/
7022         if (pci_enable_device(pdev)) {
7023                 err = -ENODEV;
7024                 goto out_ieee80211_free_hw;
7025         }
7026
7027         pci_set_master(pdev);
7028
7029         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7030         if (!err)
7031                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7032         if (err) {
7033                 IWL_WARN(priv, "No suitable DMA available.\n");
7034                 goto out_pci_disable_device;
7035         }
7036
7037         pci_set_drvdata(pdev, priv);
7038         err = pci_request_regions(pdev, DRV_NAME);
7039         if (err)
7040                 goto out_pci_disable_device;
7041
7042         /***********************
7043          * 3. Read REV Register
7044          * ********************/
7045         priv->hw_base = pci_iomap(pdev, 0, 0);
7046         if (!priv->hw_base) {
7047                 err = -ENODEV;
7048                 goto out_pci_release_regions;
7049         }
7050
7051         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7052                         (unsigned long long) pci_resource_len(pdev, 0));
7053         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7054
7055         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7056          * PCI Tx retries from interfering with C3 CPU state */
7057         pci_write_config_byte(pdev, 0x41, 0x00);
7058
7059         /* amp init */
7060         err = priv->cfg->ops->lib->apm_ops.init(priv);
7061         if (err < 0) {
7062                 IWL_DEBUG_INFO("Failed to init APMG\n");
7063                 goto out_iounmap;
7064         }
7065
7066         /***********************
7067          * 4. Read EEPROM
7068          * ********************/
7069
7070         /* Read the EEPROM */
7071         err = iwl3945_eeprom_init(priv);
7072         if (err) {
7073                 IWL_ERR(priv, "Unable to init EEPROM\n");
7074                 goto out_remove_sysfs;
7075         }
7076         /* MAC Address location in EEPROM same for 3945/4965 */
7077         get_eeprom_mac(priv, priv->mac_addr);
7078         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
7079         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7080
7081         /***********************
7082          * 5. Setup HW Constants
7083          * ********************/
7084         /* Device-specific setup */
7085         if (iwl3945_hw_set_hw_params(priv)) {
7086                 IWL_ERR(priv, "failed to set hw settings\n");
7087                 goto out_iounmap;
7088         }
7089
7090         /***********************
7091          * 6. Setup priv
7092          * ********************/
7093
7094         err = iwl3945_init_drv(priv);
7095         if (err) {
7096                 IWL_ERR(priv, "initializing driver failed\n");
7097                 goto out_free_geos;
7098         }
7099
7100         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
7101                 priv->cfg->name);
7102
7103         /***********************************
7104          * 7. Initialize Module Parameters
7105          * **********************************/
7106
7107         /* Initialize module parameter values here */
7108         /* Disable radio (SW RF KILL) via parameter when loading driver */
7109         if (iwl3945_mod_params.disable) {
7110                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7111                 IWL_DEBUG_INFO("Radio disabled.\n");
7112         }
7113
7114
7115         /***********************
7116          * 8. Setup Services
7117          * ********************/
7118
7119         spin_lock_irqsave(&priv->lock, flags);
7120         iwl3945_disable_interrupts(priv);
7121         spin_unlock_irqrestore(&priv->lock, flags);
7122
7123         pci_enable_msi(priv->pci_dev);
7124
7125         err = request_irq(priv->pci_dev->irq, iwl3945_isr, IRQF_SHARED,
7126                           DRV_NAME, priv);
7127         if (err) {
7128                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
7129                 goto out_disable_msi;
7130         }
7131
7132         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
7133         if (err) {
7134                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
7135                 goto out_release_irq;
7136         }
7137
7138         iwl3945_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
7139         iwl3945_setup_deferred_work(priv);
7140         iwl3945_setup_rx_handlers(priv);
7141
7142         /*********************************
7143          * 9. Setup and Register mac80211
7144          * *******************************/
7145
7146         err = ieee80211_register_hw(priv->hw);
7147         if (err) {
7148                 IWL_ERR(priv, "Failed to register network device: %d\n", err);
7149                 goto  out_remove_sysfs;
7150         }
7151
7152         priv->hw->conf.beacon_int = 100;
7153         priv->mac80211_registered = 1;
7154
7155         err = iwl_rfkill_init(priv);
7156         if (err)
7157                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
7158                                   "Ignoring error: %d\n", err);
7159
7160         /* Start monitoring the killswitch */
7161         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
7162                            2 * HZ);
7163
7164         return 0;
7165
7166  out_remove_sysfs:
7167         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
7168  out_free_geos:
7169         iwl3945_free_geos(priv);
7170
7171  out_release_irq:
7172         free_irq(priv->pci_dev->irq, priv);
7173         destroy_workqueue(priv->workqueue);
7174         priv->workqueue = NULL;
7175         iwl3945_unset_hw_params(priv);
7176  out_disable_msi:
7177         pci_disable_msi(priv->pci_dev);
7178  out_iounmap:
7179         pci_iounmap(pdev, priv->hw_base);
7180  out_pci_release_regions:
7181         pci_release_regions(pdev);
7182  out_pci_disable_device:
7183         pci_disable_device(pdev);
7184         pci_set_drvdata(pdev, NULL);
7185  out_ieee80211_free_hw:
7186         ieee80211_free_hw(priv->hw);
7187  out:
7188         return err;
7189 }
7190
7191 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
7192 {
7193         struct iwl_priv *priv = pci_get_drvdata(pdev);
7194         unsigned long flags;
7195
7196         if (!priv)
7197                 return;
7198
7199         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
7200
7201         set_bit(STATUS_EXIT_PENDING, &priv->status);
7202
7203         if (priv->mac80211_registered) {
7204                 ieee80211_unregister_hw(priv->hw);
7205                 priv->mac80211_registered = 0;
7206         } else {
7207                 iwl3945_down(priv);
7208         }
7209
7210         /* make sure we flush any pending irq or
7211          * tasklet for the driver
7212          */
7213         spin_lock_irqsave(&priv->lock, flags);
7214         iwl3945_disable_interrupts(priv);
7215         spin_unlock_irqrestore(&priv->lock, flags);
7216
7217         iwl_synchronize_irq(priv);
7218
7219         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
7220
7221         iwl_rfkill_unregister(priv);
7222         cancel_delayed_work(&priv->rfkill_poll);
7223
7224         iwl3945_dealloc_ucode_pci(priv);
7225
7226         if (priv->rxq.bd)
7227                 iwl_rx_queue_free(priv, &priv->rxq);
7228         iwl3945_hw_txq_ctx_free(priv);
7229
7230         iwl3945_unset_hw_params(priv);
7231         iwl3945_clear_stations_table(priv);
7232
7233         /*netif_stop_queue(dev); */
7234         flush_workqueue(priv->workqueue);
7235
7236         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
7237          * priv->workqueue... so we can't take down the workqueue
7238          * until now... */
7239         destroy_workqueue(priv->workqueue);
7240         priv->workqueue = NULL;
7241
7242         free_irq(pdev->irq, priv);
7243         pci_disable_msi(pdev);
7244
7245         pci_iounmap(pdev, priv->hw_base);
7246         pci_release_regions(pdev);
7247         pci_disable_device(pdev);
7248         pci_set_drvdata(pdev, NULL);
7249
7250         iwl3945_free_channel_map(priv);
7251         iwl3945_free_geos(priv);
7252         kfree(priv->scan);
7253         if (priv->ibss_beacon)
7254                 dev_kfree_skb(priv->ibss_beacon);
7255
7256         ieee80211_free_hw(priv->hw);
7257 }
7258
7259 #ifdef CONFIG_PM
7260
7261 static int iwl3945_pci_suspend(struct pci_dev *pdev, pm_message_t state)
7262 {
7263         struct iwl_priv *priv = pci_get_drvdata(pdev);
7264
7265         if (priv->is_open) {
7266                 set_bit(STATUS_IN_SUSPEND, &priv->status);
7267                 iwl3945_mac_stop(priv->hw);
7268                 priv->is_open = 1;
7269         }
7270         pci_save_state(pdev);
7271         pci_disable_device(pdev);
7272         pci_set_power_state(pdev, PCI_D3hot);
7273
7274         return 0;
7275 }
7276
7277 static int iwl3945_pci_resume(struct pci_dev *pdev)
7278 {
7279         struct iwl_priv *priv = pci_get_drvdata(pdev);
7280
7281         pci_set_power_state(pdev, PCI_D0);
7282         pci_enable_device(pdev);
7283         pci_restore_state(pdev);
7284
7285         if (priv->is_open)
7286                 iwl3945_mac_start(priv->hw);
7287
7288         clear_bit(STATUS_IN_SUSPEND, &priv->status);
7289         return 0;
7290 }
7291
7292 #endif /* CONFIG_PM */
7293
7294 /*****************************************************************************
7295  *
7296  * driver and module entry point
7297  *
7298  *****************************************************************************/
7299
7300 static struct pci_driver iwl3945_driver = {
7301         .name = DRV_NAME,
7302         .id_table = iwl3945_hw_card_ids,
7303         .probe = iwl3945_pci_probe,
7304         .remove = __devexit_p(iwl3945_pci_remove),
7305 #ifdef CONFIG_PM
7306         .suspend = iwl3945_pci_suspend,
7307         .resume = iwl3945_pci_resume,
7308 #endif
7309 };
7310
7311 static int __init iwl3945_init(void)
7312 {
7313
7314         int ret;
7315         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
7316         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
7317
7318         ret = iwl3945_rate_control_register();
7319         if (ret) {
7320                 printk(KERN_ERR DRV_NAME
7321                        "Unable to register rate control algorithm: %d\n", ret);
7322                 return ret;
7323         }
7324
7325         ret = pci_register_driver(&iwl3945_driver);
7326         if (ret) {
7327                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
7328                 goto error_register;
7329         }
7330
7331         return ret;
7332
7333 error_register:
7334         iwl3945_rate_control_unregister();
7335         return ret;
7336 }
7337
7338 static void __exit iwl3945_exit(void)
7339 {
7340         pci_unregister_driver(&iwl3945_driver);
7341         iwl3945_rate_control_unregister();
7342 }
7343
7344 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
7345
7346 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
7347 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
7348 module_param_named(disable, iwl3945_mod_params.disable, int, 0444);
7349 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
7350 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
7351 MODULE_PARM_DESC(swcrypto,
7352                  "using software crypto (default 1 [software])\n");
7353 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
7354 MODULE_PARM_DESC(debug, "debug output mask");
7355 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
7356 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
7357
7358 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
7359 MODULE_PARM_DESC(queues_num, "number of hw queues.");
7360
7361 module_exit(iwl3945_exit);
7362 module_init(iwl3945_init);