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-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-helpers.h"
  57 #include "iwl-core.h"
  58 #include "iwl-dev.h"
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63
  64 #define DRV_DESCRIPTION \
  65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  74 #define VS "s"
  75 #else
  76 #define VS
  77 #endif
  78
  79 #define IWL39_VERSION "1.2.26k" VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82 #define DRV_VERSION     IWL39_VERSION
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90  /* module parameters */
  91 struct iwl_mod_params iwl3945_mod_params = {
  92         .num_of_queues = IWL39_MAX_NUM_QUEUES,
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /*************** STATION TABLE MANAGEMENT ****
  99  * mac80211 should be examined to determine if sta_info is duplicating
 100  * the functionality provided here
 101  */
 102
 103 /**************************************************************/
 104 #if 0 /* temporary disable till we add real remove station */
 105 /**
 106  * iwl3945_remove_station - Remove driver's knowledge of station.
 107  *
 108  * NOTE:  This does not remove station from device's station table.
 109  */
 110 static u8 iwl3945_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 111 {
 112         int index = IWL_INVALID_STATION;
 113         int i;
 114         unsigned long flags;
 115
 116         spin_lock_irqsave(&priv->sta_lock, flags);
 117
 118         if (is_ap)
 119                 index = IWL_AP_ID;
 120         else if (is_broadcast_ether_addr(addr))
 121                 index = priv->hw_params.bcast_sta_id;
 122         else
 123                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
 124                         if (priv->stations_39[i].used &&
 125                             !compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 126                                                 addr)) {
 127                                 index = i;
 128                                 break;
 129                         }
 130
 131         if (unlikely(index == IWL_INVALID_STATION))
 132                 goto out;
 133
 134         if (priv->stations_39[index].used) {
 135                 priv->stations_39[index].used = 0;
 136                 priv->num_stations--;
 137         }
 138
 139         BUG_ON(priv->num_stations < 0);
 140
 141 out:
 142         spin_unlock_irqrestore(&priv->sta_lock, flags);
 143         return 0;
 144 }
 145 #endif
 146
 147 /**
 148  * iwl3945_clear_stations_table - Clear the driver's station table
 149  *
 150  * NOTE:  This does not clear or otherwise alter the device's station table.
 151  */
 152 void iwl3945_clear_stations_table(struct iwl_priv *priv)
 153 {
 154         unsigned long flags;
 155
 156         spin_lock_irqsave(&priv->sta_lock, flags);
 157
 158         priv->num_stations = 0;
 159         memset(priv->stations_39, 0, sizeof(priv->stations_39));
 160
 161         spin_unlock_irqrestore(&priv->sta_lock, flags);
 162 }
 163
 164 /**
 165  * iwl3945_add_station - Add station to station tables in driver and device
 166  */
 167 u8 iwl3945_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags, struct ieee80211_sta_ht_cap *ht_info)
 168 {
 169         int i;
 170         int index = IWL_INVALID_STATION;
 171         struct iwl3945_station_entry *station;
 172         unsigned long flags_spin;
 173         u8 rate;
 174
 175         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 176         if (is_ap)
 177                 index = IWL_AP_ID;
 178         else if (is_broadcast_ether_addr(addr))
 179                 index = priv->hw_params.bcast_sta_id;
 180         else
 181                 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
 182                         if (!compare_ether_addr(priv->stations_39[i].sta.sta.addr,
 183                                                 addr)) {
 184                                 index = i;
 185                                 break;
 186                         }
 187
 188                         if (!priv->stations_39[i].used &&
 189                             index == IWL_INVALID_STATION)
 190                                 index = i;
 191                 }
 192
 193         /* These two conditions has the same outcome but keep them separate
 194           since they have different meaning */
 195         if (unlikely(index == IWL_INVALID_STATION)) {
 196                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 197                 return index;
 198         }
 199
 200         if (priv->stations_39[index].used &&
 201            !compare_ether_addr(priv->stations_39[index].sta.sta.addr, addr)) {
 202                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 203                 return index;
 204         }
 205
 206         IWL_DEBUG_ASSOC(priv, "Add STA ID %d: %pM\n", index, addr);
 207         station = &priv->stations_39[index];
 208         station->used = 1;
 209         priv->num_stations++;
 210
 211         /* Set up the REPLY_ADD_STA command to send to device */
 212         memset(&station->sta, 0, sizeof(struct iwl3945_addsta_cmd));
 213         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 214         station->sta.mode = 0;
 215         station->sta.sta.sta_id = index;
 216         station->sta.station_flags = 0;
 217
 218         if (priv->band == IEEE80211_BAND_5GHZ)
 219                 rate = IWL_RATE_6M_PLCP;
 220         else
 221                 rate =  IWL_RATE_1M_PLCP;
 222
 223         /* Turn on both antennas for the station... */
 224         station->sta.rate_n_flags =
 225                         iwl3945_hw_set_rate_n_flags(rate, RATE_MCS_ANT_AB_MSK);
 226
 227         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 228
 229         /* Add station to device's station table */
 230         iwl_send_add_sta(priv,
 231                          (struct iwl_addsta_cmd *)&station->sta, flags);
 232         return index;
 233
 234 }
 235
 236 /**
 237  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 238  * @priv: eeprom and antenna fields are used to determine antenna flags
 239  *
 240  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 241  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 242  *
 243  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 244  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 245  * IWL_ANTENNA_AUX       - Force AUX antenna
 246  */
 247 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 248 {
 249         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 250
 251         switch (iwl3945_mod_params.antenna) {
 252         case IWL_ANTENNA_DIVERSITY:
 253                 return 0;
 254
 255         case IWL_ANTENNA_MAIN:
 256                 if (eeprom->antenna_switch_type)
 257                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 258                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 259
 260         case IWL_ANTENNA_AUX:
 261                 if (eeprom->antenna_switch_type)
 262                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 263                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 264         }
 265
 266         /* bad antenna selector value */
 267         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 268                 iwl3945_mod_params.antenna);
 269
 270         return 0;               /* "diversity" is default if error */
 271 }
 272
 273 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 274                                    struct ieee80211_key_conf *keyconf,
 275                                    u8 sta_id)
 276 {
 277         unsigned long flags;
 278         __le16 key_flags = 0;
 279         int ret;
 280
 281         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 282         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 283
 284         if (sta_id == priv->hw_params.bcast_sta_id)
 285                 key_flags |= STA_KEY_MULTICAST_MSK;
 286
 287         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 288         keyconf->hw_key_idx = keyconf->keyidx;
 289         key_flags &= ~STA_KEY_FLG_INVALID;
 290
 291         spin_lock_irqsave(&priv->sta_lock, flags);
 292         priv->stations_39[sta_id].keyinfo.alg = keyconf->alg;
 293         priv->stations_39[sta_id].keyinfo.keylen = keyconf->keylen;
 294         memcpy(priv->stations_39[sta_id].keyinfo.key, keyconf->key,
 295                keyconf->keylen);
 296
 297         memcpy(priv->stations_39[sta_id].sta.key.key, keyconf->key,
 298                keyconf->keylen);
 299
 300         if ((priv->stations_39[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 301                         == STA_KEY_FLG_NO_ENC)
 302                 priv->stations_39[sta_id].sta.key.key_offset =
 303                                  iwl_get_free_ucode_key_index(priv);
 304         /* else, we are overriding an existing key => no need to allocated room
 305         * in uCode. */
 306
 307         WARN(priv->stations_39[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 308                 "no space for a new key");
 309
 310         priv->stations_39[sta_id].sta.key.key_flags = key_flags;
 311         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 312         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 313
 314         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 315
 316         ret = iwl_send_add_sta(priv,
 317                 (struct iwl_addsta_cmd *)&priv->stations_39[sta_id].sta, CMD_ASYNC);
 318
 319         spin_unlock_irqrestore(&priv->sta_lock, flags);
 320
 321         return ret;
 322 }
 323
 324 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 325                                   struct ieee80211_key_conf *keyconf,
 326                                   u8 sta_id)
 327 {
 328         return -EOPNOTSUPP;
 329 }
 330
 331 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 332                                   struct ieee80211_key_conf *keyconf,
 333                                   u8 sta_id)
 334 {
 335         return -EOPNOTSUPP;
 336 }
 337
 338 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 339 {
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&priv->sta_lock, flags);
 343         memset(&priv->stations_39[sta_id].keyinfo, 0, sizeof(struct iwl3945_hw_key));
 344         memset(&priv->stations_39[sta_id].sta.key, 0,
 345                 sizeof(struct iwl4965_keyinfo));
 346         priv->stations_39[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 347         priv->stations_39[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 348         priv->stations_39[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 349         spin_unlock_irqrestore(&priv->sta_lock, flags);
 350
 351         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 352         iwl_send_add_sta(priv,
 353                 (struct iwl_addsta_cmd *)&priv->stations_39[sta_id].sta, 0);
 354         return 0;
 355 }
 356
 357 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 358                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 359 {
 360         int ret = 0;
 361
 362         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 363
 364         switch (keyconf->alg) {
 365         case ALG_CCMP:
 366                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 367                 break;
 368         case ALG_TKIP:
 369                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 370                 break;
 371         case ALG_WEP:
 372                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 373                 break;
 374         default:
 375                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 376                 ret = -EINVAL;
 377         }
 378
 379         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 380                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 381                       sta_id, ret);
 382
 383         return ret;
 384 }
 385
 386 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 387 {
 388         int ret = -EOPNOTSUPP;
 389
 390         return ret;
 391 }
 392
 393 static int iwl3945_set_static_key(struct iwl_priv *priv,
 394                                 struct ieee80211_key_conf *key)
 395 {
 396         if (key->alg == ALG_WEP)
 397                 return -EOPNOTSUPP;
 398
 399         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 400         return -EINVAL;
 401 }
 402
 403 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 404 {
 405         struct list_head *element;
 406
 407         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 408                        priv->frames_count);
 409
 410         while (!list_empty(&priv->free_frames)) {
 411                 element = priv->free_frames.next;
 412                 list_del(element);
 413                 kfree(list_entry(element, struct iwl3945_frame, list));
 414                 priv->frames_count--;
 415         }
 416
 417         if (priv->frames_count) {
 418                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 419                             priv->frames_count);
 420                 priv->frames_count = 0;
 421         }
 422 }
 423
 424 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 425 {
 426         struct iwl3945_frame *frame;
 427         struct list_head *element;
 428         if (list_empty(&priv->free_frames)) {
 429                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 430                 if (!frame) {
 431                         IWL_ERR(priv, "Could not allocate frame!\n");
 432                         return NULL;
 433                 }
 434
 435                 priv->frames_count++;
 436                 return frame;
 437         }
 438
 439         element = priv->free_frames.next;
 440         list_del(element);
 441         return list_entry(element, struct iwl3945_frame, list);
 442 }
 443
 444 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 445 {
 446         memset(frame, 0, sizeof(*frame));
 447         list_add(&frame->list, &priv->free_frames);
 448 }
 449
 450 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 451                                 struct ieee80211_hdr *hdr,
 452                                 int left)
 453 {
 454
 455         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 456             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 457              (priv->iw_mode != NL80211_IFTYPE_AP)))
 458                 return 0;
 459
 460         if (priv->ibss_beacon->len > left)
 461                 return 0;
 462
 463         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 464
 465         return priv->ibss_beacon->len;
 466 }
 467
 468 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 469 {
 470         struct iwl3945_frame *frame;
 471         unsigned int frame_size;
 472         int rc;
 473         u8 rate;
 474
 475         frame = iwl3945_get_free_frame(priv);
 476
 477         if (!frame) {
 478                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 479                           "command.\n");
 480                 return -ENOMEM;
 481         }
 482
 483         rate = iwl_rate_get_lowest_plcp(priv);
 484
 485         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 486
 487         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 488                               &frame->u.cmd[0]);
 489
 490         iwl3945_free_frame(priv, frame);
 491
 492         return rc;
 493 }
 494
 495 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 496 {
 497         if (priv->shared_virt)
 498                 pci_free_consistent(priv->pci_dev,
 499                                     sizeof(struct iwl3945_shared),
 500                                     priv->shared_virt,
 501                                     priv->shared_phys);
 502 }
 503
 504 #define MAX_UCODE_BEACON_INTERVAL       1024
 505 #define INTEL_CONN_LISTEN_INTERVAL      cpu_to_le16(0xA)
 506
 507 static __le16 iwl3945_adjust_beacon_interval(u16 beacon_val)
 508 {
 509         u16 new_val = 0;
 510         u16 beacon_factor = 0;
 511
 512         beacon_factor =
 513             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 514                 / MAX_UCODE_BEACON_INTERVAL;
 515         new_val = beacon_val / beacon_factor;
 516
 517         return cpu_to_le16(new_val);
 518 }
 519
 520 static void iwl3945_setup_rxon_timing(struct iwl_priv *priv)
 521 {
 522         u64 interval_tm_unit;
 523         u64 tsf, result;
 524         unsigned long flags;
 525         struct ieee80211_conf *conf = NULL;
 526         u16 beacon_int = 0;
 527
 528         conf = ieee80211_get_hw_conf(priv->hw);
 529
 530         spin_lock_irqsave(&priv->lock, flags);
 531         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 532         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
 533
 534         tsf = priv->timestamp;
 535
 536         beacon_int = priv->beacon_int;
 537         spin_unlock_irqrestore(&priv->lock, flags);
 538
 539         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 540                 if (beacon_int == 0) {
 541                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
 542                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
 543                 } else {
 544                         priv->rxon_timing.beacon_interval =
 545                                 cpu_to_le16(beacon_int);
 546                         priv->rxon_timing.beacon_interval =
 547                             iwl3945_adjust_beacon_interval(
 548                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 549                 }
 550
 551                 priv->rxon_timing.atim_window = 0;
 552         } else {
 553                 priv->rxon_timing.beacon_interval =
 554                         iwl3945_adjust_beacon_interval(conf->beacon_int);
 555                 /* TODO: we need to get atim_window from upper stack
 556                  * for now we set to 0 */
 557                 priv->rxon_timing.atim_window = 0;
 558         }
 559
 560         interval_tm_unit =
 561                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
 562         result = do_div(tsf, interval_tm_unit);
 563         priv->rxon_timing.beacon_init_val =
 564             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
 565
 566         IWL_DEBUG_ASSOC(priv,
 567                 "beacon interval %d beacon timer %d beacon tim %d\n",
 568                 le16_to_cpu(priv->rxon_timing.beacon_interval),
 569                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
 570                 le16_to_cpu(priv->rxon_timing.atim_window));
 571 }
 572
 573 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 574                                       struct ieee80211_tx_info *info,
 575                                       struct iwl_cmd *cmd,
 576                                       struct sk_buff *skb_frag,
 577                                       int sta_id)
 578 {
 579         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 580         struct iwl3945_hw_key *keyinfo =
 581             &priv->stations_39[sta_id].keyinfo;
 582
 583         switch (keyinfo->alg) {
 584         case ALG_CCMP:
 585                 tx->sec_ctl = TX_CMD_SEC_CCM;
 586                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 587                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 588                 break;
 589
 590         case ALG_TKIP:
 591                 break;
 592
 593         case ALG_WEP:
 594                 tx->sec_ctl = TX_CMD_SEC_WEP |
 595                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 596
 597                 if (keyinfo->keylen == 13)
 598                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 599
 600                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 601
 602                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 603                              "with key %d\n", info->control.hw_key->hw_key_idx);
 604                 break;
 605
 606         default:
 607                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 608                 break;
 609         }
 610 }
 611
 612 /*
 613  * handle build REPLY_TX command notification.
 614  */
 615 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 616                                   struct iwl_cmd *cmd,
 617                                   struct ieee80211_tx_info *info,
 618                                   struct ieee80211_hdr *hdr, u8 std_id)
 619 {
 620         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 621         __le32 tx_flags = tx->tx_flags;
 622         __le16 fc = hdr->frame_control;
 623         u8 rc_flags = info->control.rates[0].flags;
 624
 625         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 626         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 627                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 628                 if (ieee80211_is_mgmt(fc))
 629                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 630                 if (ieee80211_is_probe_resp(fc) &&
 631                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 632                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 633         } else {
 634                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 635                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 636         }
 637
 638         tx->sta_id = std_id;
 639         if (ieee80211_has_morefrags(fc))
 640                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 641
 642         if (ieee80211_is_data_qos(fc)) {
 643                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 644                 tx->tid_tspec = qc[0] & 0xf;
 645                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 646         } else {
 647                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 648         }
 649
 650         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 651                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 652                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 653         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 654                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 655                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 656         }
 657
 658         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 659                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 660
 661         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 662         if (ieee80211_is_mgmt(fc)) {
 663                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 664                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 665                 else
 666                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 667         } else {
 668                 tx->timeout.pm_frame_timeout = 0;
 669 #ifdef CONFIG_IWLWIFI_LEDS
 670                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
 671 #endif
 672         }
 673
 674         tx->driver_txop = 0;
 675         tx->tx_flags = tx_flags;
 676         tx->next_frame_len = 0;
 677 }
 678
 679 /*
 680  * start REPLY_TX command process
 681  */
 682 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 683 {
 684         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 685         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 686         struct iwl3945_tx_cmd *tx;
 687         struct iwl_tx_queue *txq = NULL;
 688         struct iwl_queue *q = NULL;
 689         struct iwl_cmd *out_cmd = NULL;
 690         dma_addr_t phys_addr;
 691         dma_addr_t txcmd_phys;
 692         int txq_id = skb_get_queue_mapping(skb);
 693         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 694         u8 id;
 695         u8 unicast;
 696         u8 sta_id;
 697         u8 tid = 0;
 698         u16 seq_number = 0;
 699         __le16 fc;
 700         u8 wait_write_ptr = 0;
 701         u8 *qc = NULL;
 702         unsigned long flags;
 703         int rc;
 704
 705         spin_lock_irqsave(&priv->lock, flags);
 706         if (iwl_is_rfkill(priv)) {
 707                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 708                 goto drop_unlock;
 709         }
 710
 711         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 712                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 713                 goto drop_unlock;
 714         }
 715
 716         unicast = !is_multicast_ether_addr(hdr->addr1);
 717         id = 0;
 718
 719         fc = hdr->frame_control;
 720
 721 #ifdef CONFIG_IWLWIFI_DEBUG
 722         if (ieee80211_is_auth(fc))
 723                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 724         else if (ieee80211_is_assoc_req(fc))
 725                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 726         else if (ieee80211_is_reassoc_req(fc))
 727                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 728 #endif
 729
 730         /* drop all data frame if we are not associated */
 731         if (ieee80211_is_data(fc) &&
 732             (!iwl_is_monitor_mode(priv)) && /* packet injection */
 733             (!iwl_is_associated(priv) ||
 734              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 735                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 736                 goto drop_unlock;
 737         }
 738
 739         spin_unlock_irqrestore(&priv->lock, flags);
 740
 741         hdr_len = ieee80211_hdrlen(fc);
 742
 743         /* Find (or create) index into station table for destination station */
 744         sta_id = iwl_get_sta_id(priv, hdr);
 745         if (sta_id == IWL_INVALID_STATION) {
 746                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 747                                hdr->addr1);
 748                 goto drop;
 749         }
 750
 751         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 752
 753         if (ieee80211_is_data_qos(fc)) {
 754                 qc = ieee80211_get_qos_ctl(hdr);
 755                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 756                 seq_number = priv->stations_39[sta_id].tid[tid].seq_number &
 757                                 IEEE80211_SCTL_SEQ;
 758                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 759                         (hdr->seq_ctrl &
 760                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 761                 seq_number += 0x10;
 762         }
 763
 764         /* Descriptor for chosen Tx queue */
 765         txq = &priv->txq[txq_id];
 766         q = &txq->q;
 767
 768         spin_lock_irqsave(&priv->lock, flags);
 769
 770         idx = get_cmd_index(q, q->write_ptr, 0);
 771
 772         /* Set up driver data for this TFD */
 773         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 774         txq->txb[q->write_ptr].skb[0] = skb;
 775
 776         /* Init first empty entry in queue's array of Tx/cmd buffers */
 777         out_cmd = txq->cmd[idx];
 778         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 779         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 780         memset(tx, 0, sizeof(*tx));
 781
 782         /*
 783          * Set up the Tx-command (not MAC!) header.
 784          * Store the chosen Tx queue and TFD index within the sequence field;
 785          * after Tx, uCode's Tx response will return this value so driver can
 786          * locate the frame within the tx queue and do post-tx processing.
 787          */
 788         out_cmd->hdr.cmd = REPLY_TX;
 789         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 790                                 INDEX_TO_SEQ(q->write_ptr)));
 791
 792         /* Copy MAC header from skb into command buffer */
 793         memcpy(tx->hdr, hdr, hdr_len);
 794
 795
 796         if (info->control.hw_key)
 797                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 798
 799         /* TODO need this for burst mode later on */
 800         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 801
 802         /* set is_hcca to 0; it probably will never be implemented */
 803         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 804
 805         /* Total # bytes to be transmitted */
 806         len = (u16)skb->len;
 807         tx->len = cpu_to_le16(len);
 808
 809
 810         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 811         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 812
 813         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 814                 txq->need_update = 1;
 815                 if (qc)
 816                         priv->stations_39[sta_id].tid[tid].seq_number = seq_number;
 817         } else {
 818                 wait_write_ptr = 1;
 819                 txq->need_update = 0;
 820         }
 821
 822         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 823                      le16_to_cpu(out_cmd->hdr.sequence));
 824         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 825         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 826         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 827                            ieee80211_hdrlen(fc));
 828
 829         /*
 830          * Use the first empty entry in this queue's command buffer array
 831          * to contain the Tx command and MAC header concatenated together
 832          * (payload data will be in another buffer).
 833          * Size of this varies, due to varying MAC header length.
 834          * If end is not dword aligned, we'll have 2 extra bytes at the end
 835          * of the MAC header (device reads on dword boundaries).
 836          * We'll tell device about this padding later.
 837          */
 838         len = sizeof(struct iwl3945_tx_cmd) +
 839                         sizeof(struct iwl_cmd_header) + hdr_len;
 840
 841         len_org = len;
 842         len = (len + 3) & ~3;
 843
 844         if (len_org != len)
 845                 len_org = 1;
 846         else
 847                 len_org = 0;
 848
 849         /* Physical address of this Tx command's header (not MAC header!),
 850          * within command buffer array. */
 851         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 852                                     len, PCI_DMA_TODEVICE);
 853         /* we do not map meta data ... so we can safely access address to
 854          * provide to unmap command*/
 855         pci_unmap_addr_set(&out_cmd->meta, mapping, txcmd_phys);
 856         pci_unmap_len_set(&out_cmd->meta, len, len);
 857
 858         /* Add buffer containing Tx command and MAC(!) header to TFD's
 859          * first entry */
 860         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 861                                                    txcmd_phys, len, 1, 0);
 862
 863
 864         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 865          * if any (802.11 null frames have no payload). */
 866         len = skb->len - hdr_len;
 867         if (len) {
 868                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 869                                            len, PCI_DMA_TODEVICE);
 870                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 871                                                            phys_addr, len,
 872                                                            0, U32_PAD(len));
 873         }
 874
 875
 876         /* Tell device the write index *just past* this latest filled TFD */
 877         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 878         rc = iwl_txq_update_write_ptr(priv, txq);
 879         spin_unlock_irqrestore(&priv->lock, flags);
 880
 881         if (rc)
 882                 return rc;
 883
 884         if ((iwl_queue_space(q) < q->high_mark)
 885             && priv->mac80211_registered) {
 886                 if (wait_write_ptr) {
 887                         spin_lock_irqsave(&priv->lock, flags);
 888                         txq->need_update = 1;
 889                         iwl_txq_update_write_ptr(priv, txq);
 890                         spin_unlock_irqrestore(&priv->lock, flags);
 891                 }
 892
 893                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 894         }
 895
 896         return 0;
 897
 898 drop_unlock:
 899         spin_unlock_irqrestore(&priv->lock, flags);
 900 drop:
 901         return -1;
 902 }
 903
 904 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 905
 906 #include "iwl-spectrum.h"
 907
 908 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 909 #define BEACON_TIME_MASK_HIGH   0xFF000000
 910 #define TIME_UNIT               1024
 911
 912 /*
 913  * extended beacon time format
 914  * time in usec will be changed into a 32-bit value in 8:24 format
 915  * the high 1 byte is the beacon counts
 916  * the lower 3 bytes is the time in usec within one beacon interval
 917  */
 918
 919 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 920 {
 921         u32 quot;
 922         u32 rem;
 923         u32 interval = beacon_interval * 1024;
 924
 925         if (!interval || !usec)
 926                 return 0;
 927
 928         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 929         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 930
 931         return (quot << 24) + rem;
 932 }
 933
 934 /* base is usually what we get from ucode with each received frame,
 935  * the same as HW timer counter counting down
 936  */
 937
 938 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 939 {
 940         u32 base_low = base & BEACON_TIME_MASK_LOW;
 941         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 942         u32 interval = beacon_interval * TIME_UNIT;
 943         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 944             (addon & BEACON_TIME_MASK_HIGH);
 945
 946         if (base_low > addon_low)
 947                 res += base_low - addon_low;
 948         else if (base_low < addon_low) {
 949                 res += interval + base_low - addon_low;
 950                 res += (1 << 24);
 951         } else
 952                 res += (1 << 24);
 953
 954         return cpu_to_le32(res);
 955 }
 956
 957 static int iwl3945_get_measurement(struct iwl_priv *priv,
 958                                struct ieee80211_measurement_params *params,
 959                                u8 type)
 960 {
 961         struct iwl_spectrum_cmd spectrum;
 962         struct iwl_rx_packet *res;
 963         struct iwl_host_cmd cmd = {
 964                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 965                 .data = (void *)&spectrum,
 966                 .meta.flags = CMD_WANT_SKB,
 967         };
 968         u32 add_time = le64_to_cpu(params->start_time);
 969         int rc;
 970         int spectrum_resp_status;
 971         int duration = le16_to_cpu(params->duration);
 972
 973         if (iwl_is_associated(priv))
 974                 add_time =
 975                     iwl3945_usecs_to_beacons(
 976                         le64_to_cpu(params->start_time) - priv->last_tsf,
 977                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 978
 979         memset(&spectrum, 0, sizeof(spectrum));
 980
 981         spectrum.channel_count = cpu_to_le16(1);
 982         spectrum.flags =
 983             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 984         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 985         cmd.len = sizeof(spectrum);
 986         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 987
 988         if (iwl_is_associated(priv))
 989                 spectrum.start_time =
 990                     iwl3945_add_beacon_time(priv->last_beacon_time,
 991                                 add_time,
 992                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 993         else
 994                 spectrum.start_time = 0;
 995
 996         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 997         spectrum.channels[0].channel = params->channel;
 998         spectrum.channels[0].type = type;
 999         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
1000                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
1001                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
1002
1003         rc = iwl_send_cmd_sync(priv, &cmd);
1004         if (rc)
1005                 return rc;
1006
1007         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1008         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1009                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
1010                 rc = -EIO;
1011         }
1012
1013         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
1014         switch (spectrum_resp_status) {
1015         case 0:         /* Command will be handled */
1016                 if (res->u.spectrum.id != 0xff) {
1017                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
1018                                                 res->u.spectrum.id);
1019                         priv->measurement_status &= ~MEASUREMENT_READY;
1020                 }
1021                 priv->measurement_status |= MEASUREMENT_ACTIVE;
1022                 rc = 0;
1023                 break;
1024
1025         case 1:         /* Command will not be handled */
1026                 rc = -EAGAIN;
1027                 break;
1028         }
1029
1030         dev_kfree_skb_any(cmd.meta.u.skb);
1031
1032         return rc;
1033 }
1034 #endif
1035
1036 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
1037                                struct iwl_rx_mem_buffer *rxb)
1038 {
1039         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1040         struct iwl_alive_resp *palive;
1041         struct delayed_work *pwork;
1042
1043         palive = &pkt->u.alive_frame;
1044
1045         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
1046                        "0x%01X 0x%01X\n",
1047                        palive->is_valid, palive->ver_type,
1048                        palive->ver_subtype);
1049
1050         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
1051                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
1052                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
1053                        sizeof(struct iwl_alive_resp));
1054                 pwork = &priv->init_alive_start;
1055         } else {
1056                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1057                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
1058                        sizeof(struct iwl_alive_resp));
1059                 pwork = &priv->alive_start;
1060                 iwl3945_disable_events(priv);
1061         }
1062
1063         /* We delay the ALIVE response by 5ms to
1064          * give the HW RF Kill time to activate... */
1065         if (palive->is_valid == UCODE_VALID_OK)
1066                 queue_delayed_work(priv->workqueue, pwork,
1067                                    msecs_to_jiffies(5));
1068         else
1069                 IWL_WARN(priv, "uCode did not respond OK.\n");
1070 }
1071
1072 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
1073                                  struct iwl_rx_mem_buffer *rxb)
1074 {
1075 #ifdef CONFIG_IWLWIFI_DEBUG
1076         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1077 #endif
1078
1079         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
1080         return;
1081 }
1082
1083 static void iwl3945_bg_beacon_update(struct work_struct *work)
1084 {
1085         struct iwl_priv *priv =
1086                 container_of(work, struct iwl_priv, beacon_update);
1087         struct sk_buff *beacon;
1088
1089         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
1090         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
1091
1092         if (!beacon) {
1093                 IWL_ERR(priv, "update beacon failed\n");
1094                 return;
1095         }
1096
1097         mutex_lock(&priv->mutex);
1098         /* new beacon skb is allocated every time; dispose previous.*/
1099         if (priv->ibss_beacon)
1100                 dev_kfree_skb(priv->ibss_beacon);
1101
1102         priv->ibss_beacon = beacon;
1103         mutex_unlock(&priv->mutex);
1104
1105         iwl3945_send_beacon_cmd(priv);
1106 }
1107
1108 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
1109                                 struct iwl_rx_mem_buffer *rxb)
1110 {
1111 #ifdef CONFIG_IWLWIFI_DEBUG
1112         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1113         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
1114         u8 rate = beacon->beacon_notify_hdr.rate;
1115
1116         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
1117                 "tsf %d %d rate %d\n",
1118                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
1119                 beacon->beacon_notify_hdr.failure_frame,
1120                 le32_to_cpu(beacon->ibss_mgr_status),
1121                 le32_to_cpu(beacon->high_tsf),
1122                 le32_to_cpu(beacon->low_tsf), rate);
1123 #endif
1124
1125         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
1126             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1127                 queue_work(priv->workqueue, &priv->beacon_update);
1128 }
1129
1130 /* Handle notification from uCode that card's power state is changing
1131  * due to software, hardware, or critical temperature RFKILL */
1132 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
1133                                     struct iwl_rx_mem_buffer *rxb)
1134 {
1135         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
1136         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1137         unsigned long status = priv->status;
1138
1139         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
1140                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1141                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1142
1143         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1144                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1145
1146         if (flags & HW_CARD_DISABLED)
1147                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1148         else
1149                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1150
1151
1152         if (flags & SW_CARD_DISABLED)
1153                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1154         else
1155                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1156
1157         iwl_scan_cancel(priv);
1158
1159         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1160              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1161             (test_bit(STATUS_RF_KILL_SW, &status) !=
1162              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1163                 queue_work(priv->workqueue, &priv->rf_kill);
1164         else
1165                 wake_up_interruptible(&priv->wait_command_queue);
1166 }
1167
1168 /**
1169  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
1170  *
1171  * Setup the RX handlers for each of the reply types sent from the uCode
1172  * to the host.
1173  *
1174  * This function chains into the hardware specific files for them to setup
1175  * any hardware specific handlers as well.
1176  */
1177 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
1178 {
1179         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
1180         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
1181         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1182         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1183         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1184         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1185             iwl_rx_pm_debug_statistics_notif;
1186         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
1187
1188         /*
1189          * The same handler is used for both the REPLY to a discrete
1190          * statistics request from the host as well as for the periodic
1191          * statistics notifications (after received beacons) from the uCode.
1192          */
1193         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
1194         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
1195
1196         iwl_setup_spectrum_handlers(priv);
1197         iwl_setup_rx_scan_handlers(priv);
1198         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
1199
1200         /* Set up hardware specific Rx handlers */
1201         iwl3945_hw_rx_handler_setup(priv);
1202 }
1203
1204 /************************** RX-FUNCTIONS ****************************/
1205 /*
1206  * Rx theory of operation
1207  *
1208  * The host allocates 32 DMA target addresses and passes the host address
1209  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1210  * 0 to 31
1211  *
1212  * Rx Queue Indexes
1213  * The host/firmware share two index registers for managing the Rx buffers.
1214  *
1215  * The READ index maps to the first position that the firmware may be writing
1216  * to -- the driver can read up to (but not including) this position and get
1217  * good data.
1218  * The READ index is managed by the firmware once the card is enabled.
1219  *
1220  * The WRITE index maps to the last position the driver has read from -- the
1221  * position preceding WRITE is the last slot the firmware can place a packet.
1222  *
1223  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1224  * WRITE = READ.
1225  *
1226  * During initialization, the host sets up the READ queue position to the first
1227  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1228  *
1229  * When the firmware places a packet in a buffer, it will advance the READ index
1230  * and fire the RX interrupt.  The driver can then query the READ index and
1231  * process as many packets as possible, moving the WRITE index forward as it
1232  * resets the Rx queue buffers with new memory.
1233  *
1234  * The management in the driver is as follows:
1235  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1236  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1237  *   to replenish the iwl->rxq->rx_free.
1238  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1239  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1240  *   'processed' and 'read' driver indexes as well)
1241  * + A received packet is processed and handed to the kernel network stack,
1242  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1243  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1244  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1245  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1246  *   were enough free buffers and RX_STALLED is set it is cleared.
1247  *
1248  *
1249  * Driver sequence:
1250  *
1251  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1252  *                            iwl3945_rx_queue_restock
1253  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1254  *                            queue, updates firmware pointers, and updates
1255  *                            the WRITE index.  If insufficient rx_free buffers
1256  *                            are available, schedules iwl3945_rx_replenish
1257  *
1258  * -- enable interrupts --
1259  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1260  *                            READ INDEX, detaching the SKB from the pool.
1261  *                            Moves the packet buffer from queue to rx_used.
1262  *                            Calls iwl3945_rx_queue_restock to refill any empty
1263  *                            slots.
1264  * ...
1265  *
1266  */
1267
1268 /**
1269  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1270  */
1271 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1272                                           dma_addr_t dma_addr)
1273 {
1274         return cpu_to_le32((u32)dma_addr);
1275 }
1276
1277 /**
1278  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1279  *
1280  * If there are slots in the RX queue that need to be restocked,
1281  * and we have free pre-allocated buffers, fill the ranks as much
1282  * as we can, pulling from rx_free.
1283  *
1284  * This moves the 'write' index forward to catch up with 'processed', and
1285  * also updates the memory address in the firmware to reference the new
1286  * target buffer.
1287  */
1288 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1289 {
1290         struct iwl_rx_queue *rxq = &priv->rxq;
1291         struct list_head *element;
1292         struct iwl_rx_mem_buffer *rxb;
1293         unsigned long flags;
1294         int write, rc;
1295
1296         spin_lock_irqsave(&rxq->lock, flags);
1297         write = rxq->write & ~0x7;
1298         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1299                 /* Get next free Rx buffer, remove from free list */
1300                 element = rxq->rx_free.next;
1301                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1302                 list_del(element);
1303
1304                 /* Point to Rx buffer via next RBD in circular buffer */
1305                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1306                 rxq->queue[rxq->write] = rxb;
1307                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1308                 rxq->free_count--;
1309         }
1310         spin_unlock_irqrestore(&rxq->lock, flags);
1311         /* If the pre-allocated buffer pool is dropping low, schedule to
1312          * refill it */
1313         if (rxq->free_count <= RX_LOW_WATERMARK)
1314                 queue_work(priv->workqueue, &priv->rx_replenish);
1315
1316
1317         /* If we've added more space for the firmware to place data, tell it.
1318          * Increment device's write pointer in multiples of 8. */
1319         if ((write != (rxq->write & ~0x7))
1320             || (abs(rxq->write - rxq->read) > 7)) {
1321                 spin_lock_irqsave(&rxq->lock, flags);
1322                 rxq->need_update = 1;
1323                 spin_unlock_irqrestore(&rxq->lock, flags);
1324                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1325                 if (rc)
1326                         return rc;
1327         }
1328
1329         return 0;
1330 }
1331
1332 /**
1333  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1334  *
1335  * When moving to rx_free an SKB is allocated for the slot.
1336  *
1337  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1338  * This is called as a scheduled work item (except for during initialization)
1339  */
1340 static void iwl3945_rx_allocate(struct iwl_priv *priv)
1341 {
1342         struct iwl_rx_queue *rxq = &priv->rxq;
1343         struct list_head *element;
1344         struct iwl_rx_mem_buffer *rxb;
1345         unsigned long flags;
1346         spin_lock_irqsave(&rxq->lock, flags);
1347         while (!list_empty(&rxq->rx_used)) {
1348                 element = rxq->rx_used.next;
1349                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1350
1351                 /* Alloc a new receive buffer */
1352                 rxb->skb =
1353                     alloc_skb(priv->hw_params.rx_buf_size,
1354                                 __GFP_NOWARN | GFP_ATOMIC);
1355                 if (!rxb->skb) {
1356                         if (net_ratelimit())
1357                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1358                         /* We don't reschedule replenish work here -- we will
1359                          * call the restock method and if it still needs
1360                          * more buffers it will schedule replenish */
1361                         break;
1362                 }
1363
1364                 /* If radiotap head is required, reserve some headroom here.
1365                  * The physical head count is a variable rx_stats->phy_count.
1366                  * We reserve 4 bytes here. Plus these extra bytes, the
1367                  * headroom of the physical head should be enough for the
1368                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1369                  */
1370                 skb_reserve(rxb->skb, 4);
1371
1372                 priv->alloc_rxb_skb++;
1373                 list_del(element);
1374
1375                 /* Get physical address of RB/SKB */
1376                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1377                                                 rxb->skb->data,
1378                                                 priv->hw_params.rx_buf_size,
1379                                                 PCI_DMA_FROMDEVICE);
1380                 list_add_tail(&rxb->list, &rxq->rx_free);
1381                 rxq->free_count++;
1382         }
1383         spin_unlock_irqrestore(&rxq->lock, flags);
1384 }
1385
1386 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1387 {
1388         unsigned long flags;
1389         int i;
1390         spin_lock_irqsave(&rxq->lock, flags);
1391         INIT_LIST_HEAD(&rxq->rx_free);
1392         INIT_LIST_HEAD(&rxq->rx_used);
1393         /* Fill the rx_used queue with _all_ of the Rx buffers */
1394         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1395                 /* In the reset function, these buffers may have been allocated
1396                  * to an SKB, so we need to unmap and free potential storage */
1397                 if (rxq->pool[i].skb != NULL) {
1398                         pci_unmap_single(priv->pci_dev,
1399                                          rxq->pool[i].real_dma_addr,
1400                                          priv->hw_params.rx_buf_size,
1401                                          PCI_DMA_FROMDEVICE);
1402                         priv->alloc_rxb_skb--;
1403                         dev_kfree_skb(rxq->pool[i].skb);
1404                         rxq->pool[i].skb = NULL;
1405                 }
1406                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1407         }
1408
1409         /* Set us so that we have processed and used all buffers, but have
1410          * not restocked the Rx queue with fresh buffers */
1411         rxq->read = rxq->write = 0;
1412         rxq->free_count = 0;
1413         spin_unlock_irqrestore(&rxq->lock, flags);
1414 }
1415
1416 /*
1417  * this should be called while priv->lock is locked
1418  */
1419 static void __iwl3945_rx_replenish(void *data)
1420 {
1421         struct iwl_priv *priv = data;
1422
1423         iwl3945_rx_allocate(priv);
1424         iwl3945_rx_queue_restock(priv);
1425 }
1426
1427
1428 void iwl3945_rx_replenish(void *data)
1429 {
1430         struct iwl_priv *priv = data;
1431         unsigned long flags;
1432
1433         iwl3945_rx_allocate(priv);
1434
1435         spin_lock_irqsave(&priv->lock, flags);
1436         iwl3945_rx_queue_restock(priv);
1437         spin_unlock_irqrestore(&priv->lock, flags);
1438 }
1439
1440 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1441  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1442  * This free routine walks the list of POOL entries and if SKB is set to
1443  * non NULL it is unmapped and freed
1444  */
1445 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1446 {
1447         int i;
1448         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1449                 if (rxq->pool[i].skb != NULL) {
1450                         pci_unmap_single(priv->pci_dev,
1451                                          rxq->pool[i].real_dma_addr,
1452                                          priv->hw_params.rx_buf_size,
1453                                          PCI_DMA_FROMDEVICE);
1454                         dev_kfree_skb(rxq->pool[i].skb);
1455                 }
1456         }
1457
1458         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1459                             rxq->dma_addr);
1460         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1461                             rxq->rb_stts, rxq->rb_stts_dma);
1462         rxq->bd = NULL;
1463         rxq->rb_stts  = NULL;
1464 }
1465 EXPORT_SYMBOL(iwl3945_rx_queue_free);
1466
1467
1468 /* Convert linear signal-to-noise ratio into dB */
1469 static u8 ratio2dB[100] = {
1470 /*       0   1   2   3   4   5   6   7   8   9 */
1471          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1472         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1473         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1474         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1475         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1476         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1477         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1478         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1479         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1480         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1481 };
1482
1483 /* Calculates a relative dB value from a ratio of linear
1484  *   (i.e. not dB) signal levels.
1485  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1486 int iwl3945_calc_db_from_ratio(int sig_ratio)
1487 {
1488         /* 1000:1 or higher just report as 60 dB */
1489         if (sig_ratio >= 1000)
1490                 return 60;
1491
1492         /* 100:1 or higher, divide by 10 and use table,
1493          *   add 20 dB to make up for divide by 10 */
1494         if (sig_ratio >= 100)
1495                 return 20 + (int)ratio2dB[sig_ratio/10];
1496
1497         /* We shouldn't see this */
1498         if (sig_ratio < 1)
1499                 return 0;
1500
1501         /* Use table for ratios 1:1 - 99:1 */
1502         return (int)ratio2dB[sig_ratio];
1503 }
1504
1505 #define PERFECT_RSSI (-20) /* dBm */
1506 #define WORST_RSSI (-95)   /* dBm */
1507 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1508
1509 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1510  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1511  *   about formulas used below. */
1512 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1513 {
1514         int sig_qual;
1515         int degradation = PERFECT_RSSI - rssi_dbm;
1516
1517         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1518          * as indicator; formula is (signal dbm - noise dbm).
1519          * SNR at or above 40 is a great signal (100%).
1520          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1521          * Weakest usable signal is usually 10 - 15 dB SNR. */
1522         if (noise_dbm) {
1523                 if (rssi_dbm - noise_dbm >= 40)
1524                         return 100;
1525                 else if (rssi_dbm < noise_dbm)
1526                         return 0;
1527                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1528
1529         /* Else use just the signal level.
1530          * This formula is a least squares fit of data points collected and
1531          *   compared with a reference system that had a percentage (%) display
1532          *   for signal quality. */
1533         } else
1534                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1535                             (15 * RSSI_RANGE + 62 * degradation)) /
1536                            (RSSI_RANGE * RSSI_RANGE);
1537
1538         if (sig_qual > 100)
1539                 sig_qual = 100;
1540         else if (sig_qual < 1)
1541                 sig_qual = 0;
1542
1543         return sig_qual;
1544 }
1545
1546 /**
1547  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1548  *
1549  * Uses the priv->rx_handlers callback function array to invoke
1550  * the appropriate handlers, including command responses,
1551  * frame-received notifications, and other notifications.
1552  */
1553 static void iwl3945_rx_handle(struct iwl_priv *priv)
1554 {
1555         struct iwl_rx_mem_buffer *rxb;
1556         struct iwl_rx_packet *pkt;
1557         struct iwl_rx_queue *rxq = &priv->rxq;
1558         u32 r, i;
1559         int reclaim;
1560         unsigned long flags;
1561         u8 fill_rx = 0;
1562         u32 count = 8;
1563
1564         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1565          * buffer that the driver may process (last buffer filled by ucode). */
1566         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1567         i = rxq->read;
1568
1569         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1570                 fill_rx = 1;
1571         /* Rx interrupt, but nothing sent from uCode */
1572         if (i == r)
1573                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1574
1575         while (i != r) {
1576                 rxb = rxq->queue[i];
1577
1578                 /* If an RXB doesn't have a Rx queue slot associated with it,
1579                  * then a bug has been introduced in the queue refilling
1580                  * routines -- catch it here */
1581                 BUG_ON(rxb == NULL);
1582
1583                 rxq->queue[i] = NULL;
1584
1585                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1586                                 priv->hw_params.rx_buf_size,
1587                                 PCI_DMA_FROMDEVICE);
1588                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1589
1590                 /* Reclaim a command buffer only if this packet is a response
1591                  *   to a (driver-originated) command.
1592                  * If the packet (e.g. Rx frame) originated from uCode,
1593                  *   there is no command buffer to reclaim.
1594                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1595                  *   but apparently a few don't get set; catch them here. */
1596                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1597                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1598                         (pkt->hdr.cmd != REPLY_TX);
1599
1600                 /* Based on type of command response or notification,
1601                  *   handle those that need handling via function in
1602                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1603                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1604                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1605                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1606                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1607                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1608                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1609                 } else {
1610                         /* No handling needed */
1611                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1612                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1613                                 r, i, get_cmd_string(pkt->hdr.cmd),
1614                                 pkt->hdr.cmd);
1615                 }
1616
1617                 if (reclaim) {
1618                         /* Invoke any callbacks, transfer the skb to caller, and
1619                          * fire off the (possibly) blocking iwl_send_cmd()
1620                          * as we reclaim the driver command queue */
1621                         if (rxb && rxb->skb)
1622                                 iwl_tx_cmd_complete(priv, rxb);
1623                         else
1624                                 IWL_WARN(priv, "Claim null rxb?\n");
1625                 }
1626
1627                 /* For now we just don't re-use anything.  We can tweak this
1628                  * later to try and re-use notification packets and SKBs that
1629                  * fail to Rx correctly */
1630                 if (rxb->skb != NULL) {
1631                         priv->alloc_rxb_skb--;
1632                         dev_kfree_skb_any(rxb->skb);
1633                         rxb->skb = NULL;
1634                 }
1635
1636                 spin_lock_irqsave(&rxq->lock, flags);
1637                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1638                 spin_unlock_irqrestore(&rxq->lock, flags);
1639                 i = (i + 1) & RX_QUEUE_MASK;
1640                 /* If there are a lot of unused frames,
1641                  * restock the Rx queue so ucode won't assert. */
1642                 if (fill_rx) {
1643                         count++;
1644                         if (count >= 8) {
1645                                 priv->rxq.read = i;
1646                                 __iwl3945_rx_replenish(priv);
1647                                 count = 0;
1648                         }
1649                 }
1650         }
1651
1652         /* Backtrack one entry */
1653         priv->rxq.read = i;
1654         iwl3945_rx_queue_restock(priv);
1655 }
1656
1657 /* call this function to flush any scheduled tasklet */
1658 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1659 {
1660         /* wait to make sure we flush pending tasklet*/
1661         synchronize_irq(priv->pci_dev->irq);
1662         tasklet_kill(&priv->irq_tasklet);
1663 }
1664
1665 static const char *desc_lookup(int i)
1666 {
1667         switch (i) {
1668         case 1:
1669                 return "FAIL";
1670         case 2:
1671                 return "BAD_PARAM";
1672         case 3:
1673                 return "BAD_CHECKSUM";
1674         case 4:
1675                 return "NMI_INTERRUPT";
1676         case 5:
1677                 return "SYSASSERT";
1678         case 6:
1679                 return "FATAL_ERROR";
1680         }
1681
1682         return "UNKNOWN";
1683 }
1684
1685 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1686 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1687
1688 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1689 {
1690         u32 i;
1691         u32 desc, time, count, base, data1;
1692         u32 blink1, blink2, ilink1, ilink2;
1693         int rc;
1694
1695         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1696
1697         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1698                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1699                 return;
1700         }
1701
1702         rc = iwl_grab_nic_access(priv);
1703         if (rc) {
1704                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1705                 return;
1706         }
1707
1708         count = iwl_read_targ_mem(priv, base);
1709
1710         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1711                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1712                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1713                         priv->status, count);
1714         }
1715
1716         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1717                   "ilink1  nmiPC   Line\n");
1718         for (i = ERROR_START_OFFSET;
1719              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1720              i += ERROR_ELEM_SIZE) {
1721                 desc = iwl_read_targ_mem(priv, base + i);
1722                 time =
1723                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1724                 blink1 =
1725                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1726                 blink2 =
1727                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1728                 ilink1 =
1729                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1730                 ilink2 =
1731                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1732                 data1 =
1733                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1734
1735                 IWL_ERR(priv,
1736                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1737                         desc_lookup(desc), desc, time, blink1, blink2,
1738                         ilink1, ilink2, data1);
1739         }
1740
1741         iwl_release_nic_access(priv);
1742
1743 }
1744
1745 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1746
1747 /**
1748  * iwl3945_print_event_log - Dump error event log to syslog
1749  *
1750  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1751  */
1752 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1753                                 u32 num_events, u32 mode)
1754 {
1755         u32 i;
1756         u32 base;       /* SRAM byte address of event log header */
1757         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1758         u32 ptr;        /* SRAM byte address of log data */
1759         u32 ev, time, data; /* event log data */
1760
1761         if (num_events == 0)
1762                 return;
1763
1764         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1765
1766         if (mode == 0)
1767                 event_size = 2 * sizeof(u32);
1768         else
1769                 event_size = 3 * sizeof(u32);
1770
1771         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1772
1773         /* "time" is actually "data" for mode 0 (no timestamp).
1774          * place event id # at far right for easier visual parsing. */
1775         for (i = 0; i < num_events; i++) {
1776                 ev = iwl_read_targ_mem(priv, ptr);
1777                 ptr += sizeof(u32);
1778                 time = iwl_read_targ_mem(priv, ptr);
1779                 ptr += sizeof(u32);
1780                 if (mode == 0) {
1781                         /* data, ev */
1782                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1783                 } else {
1784                         data = iwl_read_targ_mem(priv, ptr);
1785                         ptr += sizeof(u32);
1786                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1787                 }
1788         }
1789 }
1790
1791 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1792 {
1793         int rc;
1794         u32 base;       /* SRAM byte address of event log header */
1795         u32 capacity;   /* event log capacity in # entries */
1796         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1797         u32 num_wraps;  /* # times uCode wrapped to top of log */
1798         u32 next_entry; /* index of next entry to be written by uCode */
1799         u32 size;       /* # entries that we'll print */
1800
1801         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1802         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1803                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1804                 return;
1805         }
1806
1807         rc = iwl_grab_nic_access(priv);
1808         if (rc) {
1809                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1810                 return;
1811         }
1812
1813         /* event log header */
1814         capacity = iwl_read_targ_mem(priv, base);
1815         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1816         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1817         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1818
1819         size = num_wraps ? capacity : next_entry;
1820
1821         /* bail out if nothing in log */
1822         if (size == 0) {
1823                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1824                 iwl_release_nic_access(priv);
1825                 return;
1826         }
1827
1828         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1829                   size, num_wraps);
1830
1831         /* if uCode has wrapped back to top of log, start at the oldest entry,
1832          * i.e the next one that uCode would fill. */
1833         if (num_wraps)
1834                 iwl3945_print_event_log(priv, next_entry,
1835                                     capacity - next_entry, mode);
1836
1837         /* (then/else) start at top of log */
1838         iwl3945_print_event_log(priv, 0, next_entry, mode);
1839
1840         iwl_release_nic_access(priv);
1841 }
1842
1843 static void iwl3945_error_recovery(struct iwl_priv *priv)
1844 {
1845         unsigned long flags;
1846
1847         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1848                sizeof(priv->staging_rxon));
1849         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1850         iwlcore_commit_rxon(priv);
1851
1852         priv->cfg->ops->smgmt->add_station(priv, priv->bssid, 1, 0, NULL);
1853
1854         spin_lock_irqsave(&priv->lock, flags);
1855         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1856         priv->error_recovering = 0;
1857         spin_unlock_irqrestore(&priv->lock, flags);
1858 }
1859
1860 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1861 {
1862         u32 inta, handled = 0;
1863         u32 inta_fh;
1864         unsigned long flags;
1865 #ifdef CONFIG_IWLWIFI_DEBUG
1866         u32 inta_mask;
1867 #endif
1868
1869         spin_lock_irqsave(&priv->lock, flags);
1870
1871         /* Ack/clear/reset pending uCode interrupts.
1872          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1873          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1874         inta = iwl_read32(priv, CSR_INT);
1875         iwl_write32(priv, CSR_INT, inta);
1876
1877         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1878          * Any new interrupts that happen after this, either while we're
1879          * in this tasklet, or later, will show up in next ISR/tasklet. */
1880         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1881         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1882
1883 #ifdef CONFIG_IWLWIFI_DEBUG
1884         if (priv->debug_level & IWL_DL_ISR) {
1885                 /* just for debug */
1886                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1887                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1888                               inta, inta_mask, inta_fh);
1889         }
1890 #endif
1891
1892         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1893          * atomic, make sure that inta covers all the interrupts that
1894          * we've discovered, even if FH interrupt came in just after
1895          * reading CSR_INT. */
1896         if (inta_fh & CSR39_FH_INT_RX_MASK)
1897                 inta |= CSR_INT_BIT_FH_RX;
1898         if (inta_fh & CSR39_FH_INT_TX_MASK)
1899                 inta |= CSR_INT_BIT_FH_TX;
1900
1901         /* Now service all interrupt bits discovered above. */
1902         if (inta & CSR_INT_BIT_HW_ERR) {
1903                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1904
1905                 /* Tell the device to stop sending interrupts */
1906                 iwl_disable_interrupts(priv);
1907
1908                 priv->isr_stats.hw++;
1909                 iwl_irq_handle_error(priv);
1910
1911                 handled |= CSR_INT_BIT_HW_ERR;
1912
1913                 spin_unlock_irqrestore(&priv->lock, flags);
1914
1915                 return;
1916         }
1917
1918 #ifdef CONFIG_IWLWIFI_DEBUG
1919         if (priv->debug_level & (IWL_DL_ISR)) {
1920                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1921                 if (inta & CSR_INT_BIT_SCD) {
1922                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1923                                       "the frame/frames.\n");
1924                         priv->isr_stats.sch++;
1925                 }
1926
1927                 /* Alive notification via Rx interrupt will do the real work */
1928                 if (inta & CSR_INT_BIT_ALIVE) {
1929                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1930                         priv->isr_stats.alive++;
1931                 }
1932         }
1933 #endif
1934         /* Safely ignore these bits for debug checks below */
1935         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1936
1937         /* Error detected by uCode */
1938         if (inta & CSR_INT_BIT_SW_ERR) {
1939                 IWL_ERR(priv, "Microcode SW error detected. "
1940                         "Restarting 0x%X.\n", inta);
1941                 priv->isr_stats.sw++;
1942                 priv->isr_stats.sw_err = inta;
1943                 iwl_irq_handle_error(priv);
1944                 handled |= CSR_INT_BIT_SW_ERR;
1945         }
1946
1947         /* uCode wakes up after power-down sleep */
1948         if (inta & CSR_INT_BIT_WAKEUP) {
1949                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1950                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1951                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1952                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1953                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1954                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1955                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1956                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1957
1958                 priv->isr_stats.wakeup++;
1959                 handled |= CSR_INT_BIT_WAKEUP;
1960         }
1961
1962         /* All uCode command responses, including Tx command responses,
1963          * Rx "responses" (frame-received notification), and other
1964          * notifications from uCode come through here*/
1965         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1966                 iwl3945_rx_handle(priv);
1967                 priv->isr_stats.rx++;
1968                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1969         }
1970
1971         if (inta & CSR_INT_BIT_FH_TX) {
1972                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1973                 priv->isr_stats.tx++;
1974
1975                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1976                 if (!iwl_grab_nic_access(priv)) {
1977                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
1978                                              (FH39_SRVC_CHNL), 0x0);
1979                         iwl_release_nic_access(priv);
1980                 }
1981                 handled |= CSR_INT_BIT_FH_TX;
1982         }
1983
1984         if (inta & ~handled) {
1985                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1986                 priv->isr_stats.unhandled++;
1987         }
1988
1989         if (inta & ~CSR_INI_SET_MASK) {
1990                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1991                          inta & ~CSR_INI_SET_MASK);
1992                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1993         }
1994
1995         /* Re-enable all interrupts */
1996         /* only Re-enable if disabled by irq */
1997         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1998                 iwl_enable_interrupts(priv);
1999
2000 #ifdef CONFIG_IWLWIFI_DEBUG
2001         if (priv->debug_level & (IWL_DL_ISR)) {
2002                 inta = iwl_read32(priv, CSR_INT);
2003                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2004                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2005                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
2006                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
2007         }
2008 #endif
2009         spin_unlock_irqrestore(&priv->lock, flags);
2010 }
2011
2012 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
2013                                          enum ieee80211_band band,
2014                                      u8 is_active, u8 n_probes,
2015                                      struct iwl3945_scan_channel *scan_ch)
2016 {
2017         const struct ieee80211_channel *channels = NULL;
2018         const struct ieee80211_supported_band *sband;
2019         const struct iwl_channel_info *ch_info;
2020         u16 passive_dwell = 0;
2021         u16 active_dwell = 0;
2022         int added, i;
2023
2024         sband = iwl_get_hw_mode(priv, band);
2025         if (!sband)
2026                 return 0;
2027
2028         channels = sband->channels;
2029
2030         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
2031         passive_dwell = iwl_get_passive_dwell_time(priv, band);
2032
2033         if (passive_dwell <= active_dwell)
2034                 passive_dwell = active_dwell + 1;
2035
2036         for (i = 0, added = 0; i < sband->n_channels; i++) {
2037                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
2038                         continue;
2039
2040                 scan_ch->channel = channels[i].hw_value;
2041
2042                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
2043                 if (!is_channel_valid(ch_info)) {
2044                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
2045                                        scan_ch->channel);
2046                         continue;
2047                 }
2048
2049                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
2050                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
2051                 /* If passive , set up for auto-switch
2052                  *  and use long active_dwell time.
2053                  */
2054                 if (!is_active || is_channel_passive(ch_info) ||
2055                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
2056                         scan_ch->type = 0;      /* passive */
2057                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
2058                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
2059                 } else {
2060                         scan_ch->type = 1;      /* active */
2061                 }
2062
2063                 /* Set direct probe bits. These may be used both for active
2064                  * scan channels (probes gets sent right away),
2065                  * or for passive channels (probes get se sent only after
2066                  * hearing clear Rx packet).*/
2067                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
2068                         if (n_probes)
2069                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2070                 } else {
2071                         /* uCode v1 does not allow setting direct probe bits on
2072                          * passive channel. */
2073                         if ((scan_ch->type & 1) && n_probes)
2074                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2075                 }
2076
2077                 /* Set txpower levels to defaults */
2078                 scan_ch->tpc.dsp_atten = 110;
2079                 /* scan_pwr_info->tpc.dsp_atten; */
2080
2081                 /*scan_pwr_info->tpc.tx_gain; */
2082                 if (band == IEEE80211_BAND_5GHZ)
2083                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
2084                 else {
2085                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
2086                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
2087                          * power level:
2088                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
2089                          */
2090                 }
2091
2092                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
2093                                scan_ch->channel,
2094                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
2095                                (scan_ch->type & 1) ?
2096                                active_dwell : passive_dwell);
2097
2098                 scan_ch++;
2099                 added++;
2100         }
2101
2102         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
2103         return added;
2104 }
2105
2106 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
2107                               struct ieee80211_rate *rates)
2108 {
2109         int i;
2110
2111         for (i = 0; i < IWL_RATE_COUNT; i++) {
2112                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
2113                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
2114                 rates[i].hw_value_short = i;
2115                 rates[i].flags = 0;
2116                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
2117                         /*
2118                          * If CCK != 1M then set short preamble rate flag.
2119                          */
2120                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
2121                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
2122                 }
2123         }
2124 }
2125
2126 /******************************************************************************
2127  *
2128  * uCode download functions
2129  *
2130  ******************************************************************************/
2131
2132 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2133 {
2134         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2135         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2136         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2137         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2138         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2139         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2140 }
2141
2142 /**
2143  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2144  *     looking at all data.
2145  */
2146 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2147 {
2148         u32 val;
2149         u32 save_len = len;
2150         int rc = 0;
2151         u32 errcnt;
2152
2153         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2154
2155         rc = iwl_grab_nic_access(priv);
2156         if (rc)
2157                 return rc;
2158
2159         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2160                                IWL39_RTC_INST_LOWER_BOUND);
2161
2162         errcnt = 0;
2163         for (; len > 0; len -= sizeof(u32), image++) {
2164                 /* read data comes through single port, auto-incr addr */
2165                 /* NOTE: Use the debugless read so we don't flood kernel log
2166                  * if IWL_DL_IO is set */
2167                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2168                 if (val != le32_to_cpu(*image)) {
2169                         IWL_ERR(priv, "uCode INST section is invalid at "
2170                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2171                                   save_len - len, val, le32_to_cpu(*image));
2172                         rc = -EIO;
2173                         errcnt++;
2174                         if (errcnt >= 20)
2175                                 break;
2176                 }
2177         }
2178
2179         iwl_release_nic_access(priv);
2180
2181         if (!errcnt)
2182                 IWL_DEBUG_INFO(priv,
2183                         "ucode image in INSTRUCTION memory is good\n");
2184
2185         return rc;
2186 }
2187
2188
2189 /**
2190  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2191  *   using sample data 100 bytes apart.  If these sample points are good,
2192  *   it's a pretty good bet that everything between them is good, too.
2193  */
2194 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2195 {
2196         u32 val;
2197         int rc = 0;
2198         u32 errcnt = 0;
2199         u32 i;
2200
2201         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2202
2203         rc = iwl_grab_nic_access(priv);
2204         if (rc)
2205                 return rc;
2206
2207         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2208                 /* read data comes through single port, auto-incr addr */
2209                 /* NOTE: Use the debugless read so we don't flood kernel log
2210                  * if IWL_DL_IO is set */
2211                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2212                         i + IWL39_RTC_INST_LOWER_BOUND);
2213                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2214                 if (val != le32_to_cpu(*image)) {
2215 #if 0 /* Enable this if you want to see details */
2216                         IWL_ERR(priv, "uCode INST section is invalid at "
2217                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2218                                   i, val, *image);
2219 #endif
2220                         rc = -EIO;
2221                         errcnt++;
2222                         if (errcnt >= 3)
2223                                 break;
2224                 }
2225         }
2226
2227         iwl_release_nic_access(priv);
2228
2229         return rc;
2230 }
2231
2232
2233 /**
2234  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2235  *    and verify its contents
2236  */
2237 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2238 {
2239         __le32 *image;
2240         u32 len;
2241         int rc = 0;
2242
2243         /* Try bootstrap */
2244         image = (__le32 *)priv->ucode_boot.v_addr;
2245         len = priv->ucode_boot.len;
2246         rc = iwl3945_verify_inst_sparse(priv, image, len);
2247         if (rc == 0) {
2248                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2249                 return 0;
2250         }
2251
2252         /* Try initialize */
2253         image = (__le32 *)priv->ucode_init.v_addr;
2254         len = priv->ucode_init.len;
2255         rc = iwl3945_verify_inst_sparse(priv, image, len);
2256         if (rc == 0) {
2257                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2258                 return 0;
2259         }
2260
2261         /* Try runtime/protocol */
2262         image = (__le32 *)priv->ucode_code.v_addr;
2263         len = priv->ucode_code.len;
2264         rc = iwl3945_verify_inst_sparse(priv, image, len);
2265         if (rc == 0) {
2266                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2267                 return 0;
2268         }
2269
2270         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2271
2272         /* Since nothing seems to match, show first several data entries in
2273          * instruction SRAM, so maybe visual inspection will give a clue.
2274          * Selection of bootstrap image (vs. other images) is arbitrary. */
2275         image = (__le32 *)priv->ucode_boot.v_addr;
2276         len = priv->ucode_boot.len;
2277         rc = iwl3945_verify_inst_full(priv, image, len);
2278
2279         return rc;
2280 }
2281
2282 static void iwl3945_nic_start(struct iwl_priv *priv)
2283 {
2284         /* Remove all resets to allow NIC to operate */
2285         iwl_write32(priv, CSR_RESET, 0);
2286 }
2287
2288 /**
2289  * iwl3945_read_ucode - Read uCode images from disk file.
2290  *
2291  * Copy into buffers for card to fetch via bus-mastering
2292  */
2293 static int iwl3945_read_ucode(struct iwl_priv *priv)
2294 {
2295         struct iwl_ucode *ucode;
2296         int ret = -EINVAL, index;
2297         const struct firmware *ucode_raw;
2298         /* firmware file name contains uCode/driver compatibility version */
2299         const char *name_pre = priv->cfg->fw_name_pre;
2300         const unsigned int api_max = priv->cfg->ucode_api_max;
2301         const unsigned int api_min = priv->cfg->ucode_api_min;
2302         char buf[25];
2303         u8 *src;
2304         size_t len;
2305         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2306
2307         /* Ask kernel firmware_class module to get the boot firmware off disk.
2308          * request_firmware() is synchronous, file is in memory on return. */
2309         for (index = api_max; index >= api_min; index--) {
2310                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2311                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2312                 if (ret < 0) {
2313                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2314                                   buf, ret);
2315                         if (ret == -ENOENT)
2316                                 continue;
2317                         else
2318                                 goto error;
2319                 } else {
2320                         if (index < api_max)
2321                                 IWL_ERR(priv, "Loaded firmware %s, "
2322                                         "which is deprecated. "
2323                                         " Please use API v%u instead.\n",
2324                                           buf, api_max);
2325                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2326                                        "(%zd bytes) from disk\n",
2327                                        buf, ucode_raw->size);
2328                         break;
2329                 }
2330         }
2331
2332         if (ret < 0)
2333                 goto error;
2334
2335         /* Make sure that we got at least our header! */
2336         if (ucode_raw->size < sizeof(*ucode)) {
2337                 IWL_ERR(priv, "File size way too small!\n");
2338                 ret = -EINVAL;
2339                 goto err_release;
2340         }
2341
2342         /* Data from ucode file:  header followed by uCode images */
2343         ucode = (void *)ucode_raw->data;
2344
2345         priv->ucode_ver = le32_to_cpu(ucode->ver);
2346         api_ver = IWL_UCODE_API(priv->ucode_ver);
2347         inst_size = le32_to_cpu(ucode->inst_size);
2348         data_size = le32_to_cpu(ucode->data_size);
2349         init_size = le32_to_cpu(ucode->init_size);
2350         init_data_size = le32_to_cpu(ucode->init_data_size);
2351         boot_size = le32_to_cpu(ucode->boot_size);
2352
2353         /* api_ver should match the api version forming part of the
2354          * firmware filename ... but we don't check for that and only rely
2355          * on the API version read from firmware header from here on forward */
2356
2357         if (api_ver < api_min || api_ver > api_max) {
2358                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2359                           "Driver supports v%u, firmware is v%u.\n",
2360                           api_max, api_ver);
2361                 priv->ucode_ver = 0;
2362                 ret = -EINVAL;
2363                 goto err_release;
2364         }
2365         if (api_ver != api_max)
2366                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2367                           "got %u. New firmware can be obtained "
2368                           "from http://www.intellinuxwireless.org.\n",
2369                           api_max, api_ver);
2370
2371         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2372                 IWL_UCODE_MAJOR(priv->ucode_ver),
2373                 IWL_UCODE_MINOR(priv->ucode_ver),
2374                 IWL_UCODE_API(priv->ucode_ver),
2375                 IWL_UCODE_SERIAL(priv->ucode_ver));
2376
2377         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2378                        priv->ucode_ver);
2379         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2380                        inst_size);
2381         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2382                        data_size);
2383         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2384                        init_size);
2385         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2386                        init_data_size);
2387         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2388                        boot_size);
2389
2390
2391         /* Verify size of file vs. image size info in file's header */
2392         if (ucode_raw->size < sizeof(*ucode) +
2393                 inst_size + data_size + init_size +
2394                 init_data_size + boot_size) {
2395
2396                 IWL_DEBUG_INFO(priv, "uCode file size %zd too small\n",
2397                                ucode_raw->size);
2398                 ret = -EINVAL;
2399                 goto err_release;
2400         }
2401
2402         /* Verify that uCode images will fit in card's SRAM */
2403         if (inst_size > IWL39_MAX_INST_SIZE) {
2404                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2405                                inst_size);
2406                 ret = -EINVAL;
2407                 goto err_release;
2408         }
2409
2410         if (data_size > IWL39_MAX_DATA_SIZE) {
2411                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2412                                data_size);
2413                 ret = -EINVAL;
2414                 goto err_release;
2415         }
2416         if (init_size > IWL39_MAX_INST_SIZE) {
2417                 IWL_DEBUG_INFO(priv,
2418                                 "uCode init instr len %d too large to fit in\n",
2419                                 init_size);
2420                 ret = -EINVAL;
2421                 goto err_release;
2422         }
2423         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2424                 IWL_DEBUG_INFO(priv,
2425                                 "uCode init data len %d too large to fit in\n",
2426                                 init_data_size);
2427                 ret = -EINVAL;
2428                 goto err_release;
2429         }
2430         if (boot_size > IWL39_MAX_BSM_SIZE) {
2431                 IWL_DEBUG_INFO(priv,
2432                                 "uCode boot instr len %d too large to fit in\n",
2433                                 boot_size);
2434                 ret = -EINVAL;
2435                 goto err_release;
2436         }
2437
2438         /* Allocate ucode buffers for card's bus-master loading ... */
2439
2440         /* Runtime instructions and 2 copies of data:
2441          * 1) unmodified from disk
2442          * 2) backup cache for save/restore during power-downs */
2443         priv->ucode_code.len = inst_size;
2444         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2445
2446         priv->ucode_data.len = data_size;
2447         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2448
2449         priv->ucode_data_backup.len = data_size;
2450         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2451
2452         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2453             !priv->ucode_data_backup.v_addr)
2454                 goto err_pci_alloc;
2455
2456         /* Initialization instructions and data */
2457         if (init_size && init_data_size) {
2458                 priv->ucode_init.len = init_size;
2459                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2460
2461                 priv->ucode_init_data.len = init_data_size;
2462                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2463
2464                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2465                         goto err_pci_alloc;
2466         }
2467
2468         /* Bootstrap (instructions only, no data) */
2469         if (boot_size) {
2470                 priv->ucode_boot.len = boot_size;
2471                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2472
2473                 if (!priv->ucode_boot.v_addr)
2474                         goto err_pci_alloc;
2475         }
2476
2477         /* Copy images into buffers for card's bus-master reads ... */
2478
2479         /* Runtime instructions (first block of data in file) */
2480         src = &ucode->data[0];
2481         len = priv->ucode_code.len;
2482         IWL_DEBUG_INFO(priv,
2483                 "Copying (but not loading) uCode instr len %zd\n", len);
2484         memcpy(priv->ucode_code.v_addr, src, len);
2485         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2486                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2487
2488         /* Runtime data (2nd block)
2489          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2490         src = &ucode->data[inst_size];
2491         len = priv->ucode_data.len;
2492         IWL_DEBUG_INFO(priv,
2493                 "Copying (but not loading) uCode data len %zd\n", len);
2494         memcpy(priv->ucode_data.v_addr, src, len);
2495         memcpy(priv->ucode_data_backup.v_addr, src, len);
2496
2497         /* Initialization instructions (3rd block) */
2498         if (init_size) {
2499                 src = &ucode->data[inst_size + data_size];
2500                 len = priv->ucode_init.len;
2501                 IWL_DEBUG_INFO(priv,
2502                         "Copying (but not loading) init instr len %zd\n", len);
2503                 memcpy(priv->ucode_init.v_addr, src, len);
2504         }
2505
2506         /* Initialization data (4th block) */
2507         if (init_data_size) {
2508                 src = &ucode->data[inst_size + data_size + init_size];
2509                 len = priv->ucode_init_data.len;
2510                 IWL_DEBUG_INFO(priv,
2511                         "Copying (but not loading) init data len %zd\n", len);
2512                 memcpy(priv->ucode_init_data.v_addr, src, len);
2513         }
2514
2515         /* Bootstrap instructions (5th block) */
2516         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2517         len = priv->ucode_boot.len;
2518         IWL_DEBUG_INFO(priv,
2519                 "Copying (but not loading) boot instr len %zd\n", len);
2520         memcpy(priv->ucode_boot.v_addr, src, len);
2521
2522         /* We have our copies now, allow OS release its copies */
2523         release_firmware(ucode_raw);
2524         return 0;
2525
2526  err_pci_alloc:
2527         IWL_ERR(priv, "failed to allocate pci memory\n");
2528         ret = -ENOMEM;
2529         iwl3945_dealloc_ucode_pci(priv);
2530
2531  err_release:
2532         release_firmware(ucode_raw);
2533
2534  error:
2535         return ret;
2536 }
2537
2538
2539 /**
2540  * iwl3945_set_ucode_ptrs - Set uCode address location
2541  *
2542  * Tell initialization uCode where to find runtime uCode.
2543  *
2544  * BSM registers initially contain pointers to initialization uCode.
2545  * We need to replace them to load runtime uCode inst and data,
2546  * and to save runtime data when powering down.
2547  */
2548 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2549 {
2550         dma_addr_t pinst;
2551         dma_addr_t pdata;
2552         int rc = 0;
2553         unsigned long flags;
2554
2555         /* bits 31:0 for 3945 */
2556         pinst = priv->ucode_code.p_addr;
2557         pdata = priv->ucode_data_backup.p_addr;
2558
2559         spin_lock_irqsave(&priv->lock, flags);
2560         rc = iwl_grab_nic_access(priv);
2561         if (rc) {
2562                 spin_unlock_irqrestore(&priv->lock, flags);
2563                 return rc;
2564         }
2565
2566         /* Tell bootstrap uCode where to find image to load */
2567         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2568         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2569         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2570                                  priv->ucode_data.len);
2571
2572         /* Inst byte count must be last to set up, bit 31 signals uCode
2573          *   that all new ptr/size info is in place */
2574         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2575                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2576
2577         iwl_release_nic_access(priv);
2578
2579         spin_unlock_irqrestore(&priv->lock, flags);
2580
2581         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2582
2583         return rc;
2584 }
2585
2586 /**
2587  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2588  *
2589  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2590  *
2591  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2592  */
2593 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2594 {
2595         /* Check alive response for "valid" sign from uCode */
2596         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2597                 /* We had an error bringing up the hardware, so take it
2598                  * all the way back down so we can try again */
2599                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2600                 goto restart;
2601         }
2602
2603         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2604          * This is a paranoid check, because we would not have gotten the
2605          * "initialize" alive if code weren't properly loaded.  */
2606         if (iwl3945_verify_ucode(priv)) {
2607                 /* Runtime instruction load was bad;
2608                  * take it all the way back down so we can try again */
2609                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2610                 goto restart;
2611         }
2612
2613         /* Send pointers to protocol/runtime uCode image ... init code will
2614          * load and launch runtime uCode, which will send us another "Alive"
2615          * notification. */
2616         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2617         if (iwl3945_set_ucode_ptrs(priv)) {
2618                 /* Runtime instruction load won't happen;
2619                  * take it all the way back down so we can try again */
2620                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2621                 goto restart;
2622         }
2623         return;
2624
2625  restart:
2626         queue_work(priv->workqueue, &priv->restart);
2627 }
2628
2629 /**
2630  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2631  *                   from protocol/runtime uCode (initialization uCode's
2632  *                   Alive gets handled by iwl3945_init_alive_start()).
2633  */
2634 static void iwl3945_alive_start(struct iwl_priv *priv)
2635 {
2636         int rc = 0;
2637         int thermal_spin = 0;
2638         u32 rfkill;
2639
2640         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2641
2642         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2643                 /* We had an error bringing up the hardware, so take it
2644                  * all the way back down so we can try again */
2645                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2646                 goto restart;
2647         }
2648
2649         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2650          * This is a paranoid check, because we would not have gotten the
2651          * "runtime" alive if code weren't properly loaded.  */
2652         if (iwl3945_verify_ucode(priv)) {
2653                 /* Runtime instruction load was bad;
2654                  * take it all the way back down so we can try again */
2655                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2656                 goto restart;
2657         }
2658
2659         priv->cfg->ops->smgmt->clear_station_table(priv);
2660
2661         rc = iwl_grab_nic_access(priv);
2662         if (rc) {
2663                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
2664                 return;
2665         }
2666
2667         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2668         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2669         iwl_release_nic_access(priv);
2670
2671         if (rfkill & 0x1) {
2672                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2673                 /* if RFKILL is not on, then wait for thermal
2674                  * sensor in adapter to kick in */
2675                 while (iwl3945_hw_get_temperature(priv) == 0) {
2676                         thermal_spin++;
2677                         udelay(10);
2678                 }
2679
2680                 if (thermal_spin)
2681                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2682                                        thermal_spin * 10);
2683         } else
2684                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2685
2686         /* After the ALIVE response, we can send commands to 3945 uCode */
2687         set_bit(STATUS_ALIVE, &priv->status);
2688
2689         /* Clear out the uCode error bit if it is set */
2690         clear_bit(STATUS_FW_ERROR, &priv->status);
2691
2692         if (iwl_is_rfkill(priv))
2693                 return;
2694
2695         ieee80211_wake_queues(priv->hw);
2696
2697         priv->active_rate = priv->rates_mask;
2698         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2699
2700         iwl_power_update_mode(priv, false);
2701
2702         if (iwl_is_associated(priv)) {
2703                 struct iwl3945_rxon_cmd *active_rxon =
2704                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2705
2706                 memcpy(&priv->staging_rxon, &priv->active_rxon,
2707                        sizeof(priv->staging_rxon));
2708                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2709         } else {
2710                 /* Initialize our rx_config data */
2711                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2712         }
2713
2714         /* Configure Bluetooth device coexistence support */
2715         iwl_send_bt_config(priv);
2716
2717         /* Configure the adapter for unassociated operation */
2718         iwlcore_commit_rxon(priv);
2719
2720         iwl3945_reg_txpower_periodic(priv);
2721
2722         iwl3945_led_register(priv);
2723
2724         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2725         set_bit(STATUS_READY, &priv->status);
2726         wake_up_interruptible(&priv->wait_command_queue);
2727
2728         if (priv->error_recovering)
2729                 iwl3945_error_recovery(priv);
2730
2731         /* reassociate for ADHOC mode */
2732         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2733                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2734                                                                 priv->vif);
2735                 if (beacon)
2736                         iwl_mac_beacon_update(priv->hw, beacon);
2737         }
2738
2739         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2740                 iwl_set_mode(priv, priv->iw_mode);
2741
2742         return;
2743
2744  restart:
2745         queue_work(priv->workqueue, &priv->restart);
2746 }
2747
2748 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2749
2750 static void __iwl3945_down(struct iwl_priv *priv)
2751 {
2752         unsigned long flags;
2753         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2754         struct ieee80211_conf *conf = NULL;
2755
2756         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2757
2758         conf = ieee80211_get_hw_conf(priv->hw);
2759
2760         if (!exit_pending)
2761                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2762
2763         iwl3945_led_unregister(priv);
2764         priv->cfg->ops->smgmt->clear_station_table(priv);
2765
2766         /* Unblock any waiting calls */
2767         wake_up_interruptible_all(&priv->wait_command_queue);
2768
2769         /* Wipe out the EXIT_PENDING status bit if we are not actually
2770          * exiting the module */
2771         if (!exit_pending)
2772                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2773
2774         /* stop and reset the on-board processor */
2775         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2776
2777         /* tell the device to stop sending interrupts */
2778         spin_lock_irqsave(&priv->lock, flags);
2779         iwl_disable_interrupts(priv);
2780         spin_unlock_irqrestore(&priv->lock, flags);
2781         iwl_synchronize_irq(priv);
2782
2783         if (priv->mac80211_registered)
2784                 ieee80211_stop_queues(priv->hw);
2785
2786         /* If we have not previously called iwl3945_init() then
2787          * clear all bits but the RF Kill bits and return */
2788         if (!iwl_is_init(priv)) {
2789                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2790                                         STATUS_RF_KILL_HW |
2791                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2792                                         STATUS_RF_KILL_SW |
2793                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2794                                         STATUS_GEO_CONFIGURED |
2795                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2796                                         STATUS_EXIT_PENDING;
2797                 goto exit;
2798         }
2799
2800         /* ...otherwise clear out all the status bits but the RF Kill
2801          * bits and continue taking the NIC down. */
2802         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2803                                 STATUS_RF_KILL_HW |
2804                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2805                                 STATUS_RF_KILL_SW |
2806                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2807                                 STATUS_GEO_CONFIGURED |
2808                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2809                                 STATUS_FW_ERROR |
2810                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2811                                 STATUS_EXIT_PENDING;
2812
2813         priv->cfg->ops->lib->apm_ops.reset(priv);
2814         spin_lock_irqsave(&priv->lock, flags);
2815         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2816         spin_unlock_irqrestore(&priv->lock, flags);
2817
2818         iwl3945_hw_txq_ctx_stop(priv);
2819         iwl3945_hw_rxq_stop(priv);
2820
2821         spin_lock_irqsave(&priv->lock, flags);
2822         if (!iwl_grab_nic_access(priv)) {
2823                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2824                                          APMG_CLK_VAL_DMA_CLK_RQT);
2825                 iwl_release_nic_access(priv);
2826         }
2827         spin_unlock_irqrestore(&priv->lock, flags);
2828
2829         udelay(5);
2830
2831         if (exit_pending)
2832                 priv->cfg->ops->lib->apm_ops.stop(priv);
2833         else
2834                 priv->cfg->ops->lib->apm_ops.reset(priv);
2835
2836  exit:
2837         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2838
2839         if (priv->ibss_beacon)
2840                 dev_kfree_skb(priv->ibss_beacon);
2841         priv->ibss_beacon = NULL;
2842
2843         /* clear out any free frames */
2844         iwl3945_clear_free_frames(priv);
2845 }
2846
2847 static void iwl3945_down(struct iwl_priv *priv)
2848 {
2849         mutex_lock(&priv->mutex);
2850         __iwl3945_down(priv);
2851         mutex_unlock(&priv->mutex);
2852
2853         iwl3945_cancel_deferred_work(priv);
2854 }
2855
2856 #define MAX_HW_RESTARTS 5
2857
2858 static int __iwl3945_up(struct iwl_priv *priv)
2859 {
2860         int rc, i;
2861
2862         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2863                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2864                 return -EIO;
2865         }
2866
2867         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
2868                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
2869                             "parameter)\n");
2870                 return -ENODEV;
2871         }
2872
2873         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2874                 IWL_ERR(priv, "ucode not available for device bring up\n");
2875                 return -EIO;
2876         }
2877
2878         /* If platform's RF_KILL switch is NOT set to KILL */
2879         if (iwl_read32(priv, CSR_GP_CNTRL) &
2880                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2881                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2882         else {
2883                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2884                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2885                 return -ENODEV;
2886         }
2887
2888         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2889
2890         rc = iwl3945_hw_nic_init(priv);
2891         if (rc) {
2892                 IWL_ERR(priv, "Unable to int nic\n");
2893                 return rc;
2894         }
2895
2896         /* make sure rfkill handshake bits are cleared */
2897         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2898         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2899                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2900
2901         /* clear (again), then enable host interrupts */
2902         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2903         iwl_enable_interrupts(priv);
2904
2905         /* really make sure rfkill handshake bits are cleared */
2906         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2907         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2908
2909         /* Copy original ucode data image from disk into backup cache.
2910          * This will be used to initialize the on-board processor's
2911          * data SRAM for a clean start when the runtime program first loads. */
2912         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2913                priv->ucode_data.len);
2914
2915         /* We return success when we resume from suspend and rf_kill is on. */
2916         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2917                 return 0;
2918
2919         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2920
2921                 priv->cfg->ops->smgmt->clear_station_table(priv);
2922
2923                 /* load bootstrap state machine,
2924                  * load bootstrap program into processor's memory,
2925                  * prepare to load the "initialize" uCode */
2926                 priv->cfg->ops->lib->load_ucode(priv);
2927
2928                 if (rc) {
2929                         IWL_ERR(priv,
2930                                 "Unable to set up bootstrap uCode: %d\n", rc);
2931                         continue;
2932                 }
2933
2934                 /* start card; "initialize" will load runtime ucode */
2935                 iwl3945_nic_start(priv);
2936
2937                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2938
2939                 return 0;
2940         }
2941
2942         set_bit(STATUS_EXIT_PENDING, &priv->status);
2943         __iwl3945_down(priv);
2944         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2945
2946         /* tried to restart and config the device for as long as our
2947          * patience could withstand */
2948         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2949         return -EIO;
2950 }
2951
2952
2953 /*****************************************************************************
2954  *
2955  * Workqueue callbacks
2956  *
2957  *****************************************************************************/
2958
2959 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2960 {
2961         struct iwl_priv *priv =
2962             container_of(data, struct iwl_priv, init_alive_start.work);
2963
2964         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2965                 return;
2966
2967         mutex_lock(&priv->mutex);
2968         iwl3945_init_alive_start(priv);
2969         mutex_unlock(&priv->mutex);
2970 }
2971
2972 static void iwl3945_bg_alive_start(struct work_struct *data)
2973 {
2974         struct iwl_priv *priv =
2975             container_of(data, struct iwl_priv, alive_start.work);
2976
2977         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2978                 return;
2979
2980         mutex_lock(&priv->mutex);
2981         iwl3945_alive_start(priv);
2982         mutex_unlock(&priv->mutex);
2983 }
2984
2985 static void iwl3945_rfkill_poll(struct work_struct *data)
2986 {
2987         struct iwl_priv *priv =
2988             container_of(data, struct iwl_priv, rfkill_poll.work);
2989         unsigned long status = priv->status;
2990
2991         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2992                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2993         else
2994                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2995
2996         if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))
2997                 queue_work(priv->workqueue, &priv->rf_kill);
2998
2999         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3000                            round_jiffies_relative(2 * HZ));
3001
3002 }
3003
3004 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
3005 static void iwl3945_bg_request_scan(struct work_struct *data)
3006 {
3007         struct iwl_priv *priv =
3008             container_of(data, struct iwl_priv, request_scan);
3009         struct iwl_host_cmd cmd = {
3010                 .id = REPLY_SCAN_CMD,
3011                 .len = sizeof(struct iwl3945_scan_cmd),
3012                 .meta.flags = CMD_SIZE_HUGE,
3013         };
3014         int rc = 0;
3015         struct iwl3945_scan_cmd *scan;
3016         struct ieee80211_conf *conf = NULL;
3017         u8 n_probes = 0;
3018         enum ieee80211_band band;
3019         bool is_active = false;
3020
3021         conf = ieee80211_get_hw_conf(priv->hw);
3022
3023         mutex_lock(&priv->mutex);
3024
3025         if (!iwl_is_ready(priv)) {
3026                 IWL_WARN(priv, "request scan called when driver not ready.\n");
3027                 goto done;
3028         }
3029
3030         /* Make sure the scan wasn't canceled before this queued work
3031          * was given the chance to run... */
3032         if (!test_bit(STATUS_SCANNING, &priv->status))
3033                 goto done;
3034
3035         /* This should never be called or scheduled if there is currently
3036          * a scan active in the hardware. */
3037         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
3038                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
3039                                 "Ignoring second request.\n");
3040                 rc = -EIO;
3041                 goto done;
3042         }
3043
3044         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3045                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
3046                 goto done;
3047         }
3048
3049         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3050                 IWL_DEBUG_HC(priv,
3051                         "Scan request while abort pending. Queuing.\n");
3052                 goto done;
3053         }
3054
3055         if (iwl_is_rfkill(priv)) {
3056                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
3057                 goto done;
3058         }
3059
3060         if (!test_bit(STATUS_READY, &priv->status)) {
3061                 IWL_DEBUG_HC(priv,
3062                         "Scan request while uninitialized. Queuing.\n");
3063                 goto done;
3064         }
3065
3066         if (!priv->scan_bands) {
3067                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
3068                 goto done;
3069         }
3070
3071         if (!priv->scan) {
3072                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
3073                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
3074                 if (!priv->scan) {
3075                         rc = -ENOMEM;
3076                         goto done;
3077                 }
3078         }
3079         scan = priv->scan;
3080         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
3081
3082         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
3083         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
3084
3085         if (iwl_is_associated(priv)) {
3086                 u16 interval = 0;
3087                 u32 extra;
3088                 u32 suspend_time = 100;
3089                 u32 scan_suspend_time = 100;
3090                 unsigned long flags;
3091
3092                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
3093
3094                 spin_lock_irqsave(&priv->lock, flags);
3095                 interval = priv->beacon_int;
3096                 spin_unlock_irqrestore(&priv->lock, flags);
3097
3098                 scan->suspend_time = 0;
3099                 scan->max_out_time = cpu_to_le32(200 * 1024);
3100                 if (!interval)
3101                         interval = suspend_time;
3102                 /*
3103                  * suspend time format:
3104                  *  0-19: beacon interval in usec (time before exec.)
3105                  * 20-23: 0
3106                  * 24-31: number of beacons (suspend between channels)
3107                  */
3108
3109                 extra = (suspend_time / interval) << 24;
3110                 scan_suspend_time = 0xFF0FFFFF &
3111                     (extra | ((suspend_time % interval) * 1024));
3112
3113                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
3114                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
3115                                scan_suspend_time, interval);
3116         }
3117
3118         if (priv->scan_request->n_ssids) {
3119                 int i, p = 0;
3120                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
3121                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
3122                         /* always does wildcard anyway */
3123                         if (!priv->scan_request->ssids[i].ssid_len)
3124                                 continue;
3125                         scan->direct_scan[p].id = WLAN_EID_SSID;
3126                         scan->direct_scan[p].len =
3127                                 priv->scan_request->ssids[i].ssid_len;
3128                         memcpy(scan->direct_scan[p].ssid,
3129                                priv->scan_request->ssids[i].ssid,
3130                                priv->scan_request->ssids[i].ssid_len);
3131                         n_probes++;
3132                         p++;
3133                 }
3134                 is_active = true;
3135         } else
3136                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
3137
3138         /* We don't build a direct scan probe request; the uCode will do
3139          * that based on the direct_mask added to each channel entry */
3140         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
3141         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
3142         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3143
3144         /* flags + rate selection */
3145
3146         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
3147                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3148                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
3149                 scan->good_CRC_th = 0;
3150                 band = IEEE80211_BAND_2GHZ;
3151         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
3152                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
3153                 /*
3154                  * If active scaning is requested but a certain channel
3155                  * is marked passive, we can do active scanning if we
3156                  * detect transmissions.
3157                  */
3158                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
3159                 band = IEEE80211_BAND_5GHZ;
3160         } else {
3161                 IWL_WARN(priv, "Invalid scan band count\n");
3162                 goto done;
3163         }
3164
3165         scan->tx_cmd.len = cpu_to_le16(
3166                         iwl_fill_probe_req(priv,
3167                                 (struct ieee80211_mgmt *)scan->data,
3168                                 priv->scan_request->ie,
3169                                 priv->scan_request->ie_len,
3170                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3171
3172         /* select Rx antennas */
3173         scan->flags |= iwl3945_get_antenna_flags(priv);
3174
3175         if (iwl_is_monitor_mode(priv))
3176                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3177
3178         scan->channel_count =
3179                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3180                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3181
3182         if (scan->channel_count == 0) {
3183                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3184                 goto done;
3185         }
3186
3187         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3188             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3189         cmd.data = scan;
3190         scan->len = cpu_to_le16(cmd.len);
3191
3192         set_bit(STATUS_SCAN_HW, &priv->status);
3193         rc = iwl_send_cmd_sync(priv, &cmd);
3194         if (rc)
3195                 goto done;
3196
3197         queue_delayed_work(priv->workqueue, &priv->scan_check,
3198                            IWL_SCAN_CHECK_WATCHDOG);
3199
3200         mutex_unlock(&priv->mutex);
3201         return;
3202
3203  done:
3204         /* can not perform scan make sure we clear scanning
3205          * bits from status so next scan request can be performed.
3206          * if we dont clear scanning status bit here all next scan
3207          * will fail
3208         */
3209         clear_bit(STATUS_SCAN_HW, &priv->status);
3210         clear_bit(STATUS_SCANNING, &priv->status);
3211
3212         /* inform mac80211 scan aborted */
3213         queue_work(priv->workqueue, &priv->scan_completed);
3214         mutex_unlock(&priv->mutex);
3215 }
3216
3217 static void iwl3945_bg_up(struct work_struct *data)
3218 {
3219         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3220
3221         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3222                 return;
3223
3224         mutex_lock(&priv->mutex);
3225         __iwl3945_up(priv);
3226         mutex_unlock(&priv->mutex);
3227         iwl_rfkill_set_hw_state(priv);
3228 }
3229
3230 static void iwl3945_bg_restart(struct work_struct *data)
3231 {
3232         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3233
3234         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3235                 return;
3236
3237         iwl3945_down(priv);
3238         queue_work(priv->workqueue, &priv->up);
3239 }
3240
3241 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3242 {
3243         struct iwl_priv *priv =
3244             container_of(data, struct iwl_priv, rx_replenish);
3245
3246         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3247                 return;
3248
3249         mutex_lock(&priv->mutex);
3250         iwl3945_rx_replenish(priv);
3251         mutex_unlock(&priv->mutex);
3252 }
3253
3254 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3255
3256 void iwl3945_post_associate(struct iwl_priv *priv)
3257 {
3258         int rc = 0;
3259         struct ieee80211_conf *conf = NULL;
3260
3261         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3262                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3263                 return;
3264         }
3265
3266
3267         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3268                         priv->assoc_id, priv->active_rxon.bssid_addr);
3269
3270         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3271                 return;
3272
3273         if (!priv->vif || !priv->is_open)
3274                 return;
3275
3276         iwl_scan_cancel_timeout(priv, 200);
3277
3278         conf = ieee80211_get_hw_conf(priv->hw);
3279
3280         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3281         iwlcore_commit_rxon(priv);
3282
3283         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3284         iwl3945_setup_rxon_timing(priv);
3285         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3286                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3287         if (rc)
3288                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3289                             "Attempting to continue.\n");
3290
3291         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3292
3293         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3294
3295         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3296                         priv->assoc_id, priv->beacon_int);
3297
3298         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3299                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3300         else
3301                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3302
3303         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3304                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3305                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3306                 else
3307                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3308
3309                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3310                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3311
3312         }
3313
3314         iwlcore_commit_rxon(priv);
3315
3316         switch (priv->iw_mode) {
3317         case NL80211_IFTYPE_STATION:
3318                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3319                 break;
3320
3321         case NL80211_IFTYPE_ADHOC:
3322
3323                 priv->assoc_id = 1;
3324                 priv->cfg->ops->smgmt->add_station(priv, priv->bssid, 0, 0, NULL);
3325                 iwl3945_sync_sta(priv, IWL_STA_ID,
3326                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3327                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3328                                  CMD_ASYNC);
3329                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3330                 iwl3945_send_beacon_cmd(priv);
3331
3332                 break;
3333
3334         default:
3335                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3336                            __func__, priv->iw_mode);
3337                 break;
3338         }
3339
3340         iwl_activate_qos(priv, 0);
3341
3342         /* we have just associated, don't start scan too early */
3343         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3344 }
3345
3346 /*****************************************************************************
3347  *
3348  * mac80211 entry point functions
3349  *
3350  *****************************************************************************/
3351
3352 #define UCODE_READY_TIMEOUT     (2 * HZ)
3353
3354 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3355 {
3356         struct iwl_priv *priv = hw->priv;
3357         int ret;
3358
3359         IWL_DEBUG_MAC80211(priv, "enter\n");
3360
3361         /* we should be verifying the device is ready to be opened */
3362         mutex_lock(&priv->mutex);
3363
3364         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
3365         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3366          * ucode filename and max sizes are card-specific. */
3367
3368         if (!priv->ucode_code.len) {
3369                 ret = iwl3945_read_ucode(priv);
3370                 if (ret) {
3371                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3372                         mutex_unlock(&priv->mutex);
3373                         goto out_release_irq;
3374                 }
3375         }
3376
3377         ret = __iwl3945_up(priv);
3378
3379         mutex_unlock(&priv->mutex);
3380
3381         iwl_rfkill_set_hw_state(priv);
3382
3383         if (ret)
3384                 goto out_release_irq;
3385
3386         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3387
3388         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3389          * mac80211 will not be run successfully. */
3390         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3391                         test_bit(STATUS_READY, &priv->status),
3392                         UCODE_READY_TIMEOUT);
3393         if (!ret) {
3394                 if (!test_bit(STATUS_READY, &priv->status)) {
3395                         IWL_ERR(priv,
3396                                 "Wait for START_ALIVE timeout after %dms.\n",
3397                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3398                         ret = -ETIMEDOUT;
3399                         goto out_release_irq;
3400                 }
3401         }
3402
3403         /* ucode is running and will send rfkill notifications,
3404          * no need to poll the killswitch state anymore */
3405         cancel_delayed_work(&priv->rfkill_poll);
3406
3407         priv->is_open = 1;
3408         IWL_DEBUG_MAC80211(priv, "leave\n");
3409         return 0;
3410
3411 out_release_irq:
3412         priv->is_open = 0;
3413         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3414         return ret;
3415 }
3416
3417 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3418 {
3419         struct iwl_priv *priv = hw->priv;
3420
3421         IWL_DEBUG_MAC80211(priv, "enter\n");
3422
3423         if (!priv->is_open) {
3424                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3425                 return;
3426         }
3427
3428         priv->is_open = 0;
3429
3430         if (iwl_is_ready_rf(priv)) {
3431                 /* stop mac, cancel any scan request and clear
3432                  * RXON_FILTER_ASSOC_MSK BIT
3433                  */
3434                 mutex_lock(&priv->mutex);
3435                 iwl_scan_cancel_timeout(priv, 100);
3436                 mutex_unlock(&priv->mutex);
3437         }
3438
3439         iwl3945_down(priv);
3440
3441         flush_workqueue(priv->workqueue);
3442
3443         /* start polling the killswitch state again */
3444         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3445                            round_jiffies_relative(2 * HZ));
3446
3447         IWL_DEBUG_MAC80211(priv, "leave\n");
3448 }
3449
3450 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3451 {
3452         struct iwl_priv *priv = hw->priv;
3453
3454         IWL_DEBUG_MAC80211(priv, "enter\n");
3455
3456         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3457                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3458
3459         if (iwl3945_tx_skb(priv, skb))
3460                 dev_kfree_skb_any(skb);
3461
3462         IWL_DEBUG_MAC80211(priv, "leave\n");
3463         return NETDEV_TX_OK;
3464 }
3465
3466 void iwl3945_config_ap(struct iwl_priv *priv)
3467 {
3468         int rc = 0;
3469
3470         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3471                 return;
3472
3473         /* The following should be done only at AP bring up */
3474         if (!(iwl_is_associated(priv))) {
3475
3476                 /* RXON - unassoc (to set timing command) */
3477                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3478                 iwlcore_commit_rxon(priv);
3479
3480                 /* RXON Timing */
3481                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3482                 iwl3945_setup_rxon_timing(priv);
3483                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3484                                       sizeof(priv->rxon_timing),
3485                                       &priv->rxon_timing);
3486                 if (rc)
3487                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3488                                         "Attempting to continue.\n");
3489
3490                 /* FIXME: what should be the assoc_id for AP? */
3491                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3492                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3493                         priv->staging_rxon.flags |=
3494                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3495                 else
3496                         priv->staging_rxon.flags &=
3497                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3498
3499                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3500                         if (priv->assoc_capability &
3501                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3502                                 priv->staging_rxon.flags |=
3503                                         RXON_FLG_SHORT_SLOT_MSK;
3504                         else
3505                                 priv->staging_rxon.flags &=
3506                                         ~RXON_FLG_SHORT_SLOT_MSK;
3507
3508                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3509                                 priv->staging_rxon.flags &=
3510                                         ~RXON_FLG_SHORT_SLOT_MSK;
3511                 }
3512                 /* restore RXON assoc */
3513                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3514                 iwlcore_commit_rxon(priv);
3515                 priv->cfg->ops->smgmt->add_station(priv, iwl_bcast_addr, 0, 0, NULL);
3516         }
3517         iwl3945_send_beacon_cmd(priv);
3518
3519         /* FIXME - we need to add code here to detect a totally new
3520          * configuration, reset the AP, unassoc, rxon timing, assoc,
3521          * clear sta table, add BCAST sta... */
3522 }
3523
3524 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3525                                struct ieee80211_vif *vif,
3526                                struct ieee80211_sta *sta,
3527                                struct ieee80211_key_conf *key)
3528 {
3529         struct iwl_priv *priv = hw->priv;
3530         const u8 *addr;
3531         int ret = 0;
3532         u8 sta_id = IWL_INVALID_STATION;
3533         u8 static_key;
3534
3535         IWL_DEBUG_MAC80211(priv, "enter\n");
3536
3537         if (iwl3945_mod_params.sw_crypto) {
3538                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3539                 return -EOPNOTSUPP;
3540         }
3541
3542         addr = sta ? sta->addr : iwl_bcast_addr;
3543         static_key = !iwl_is_associated(priv);
3544
3545         if (!static_key) {
3546                 sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
3547                 if (sta_id == IWL_INVALID_STATION) {
3548                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3549                                             addr);
3550                         return -EINVAL;
3551                 }
3552         }
3553
3554         mutex_lock(&priv->mutex);
3555         iwl_scan_cancel_timeout(priv, 100);
3556         mutex_unlock(&priv->mutex);
3557
3558         switch (cmd) {
3559         case SET_KEY:
3560                 if (static_key)
3561                         ret = iwl3945_set_static_key(priv, key);
3562                 else
3563                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3564                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3565                 break;
3566         case DISABLE_KEY:
3567                 if (static_key)
3568                         ret = iwl3945_remove_static_key(priv);
3569                 else
3570                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3571                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3572                 break;
3573         default:
3574                 ret = -EINVAL;
3575         }
3576
3577         IWL_DEBUG_MAC80211(priv, "leave\n");
3578
3579         return ret;
3580 }
3581
3582 /*****************************************************************************
3583  *
3584  * sysfs attributes
3585  *
3586  *****************************************************************************/
3587
3588 #ifdef CONFIG_IWLWIFI_DEBUG
3589
3590 /*
3591  * The following adds a new attribute to the sysfs representation
3592  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3593  * used for controlling the debug level.
3594  *
3595  * See the level definitions in iwl for details.
3596  */
3597 static ssize_t show_debug_level(struct device *d,
3598                                 struct device_attribute *attr, char *buf)
3599 {
3600         struct iwl_priv *priv = d->driver_data;
3601
3602         return sprintf(buf, "0x%08X\n", priv->debug_level);
3603 }
3604 static ssize_t store_debug_level(struct device *d,
3605                                 struct device_attribute *attr,
3606                                  const char *buf, size_t count)
3607 {
3608         struct iwl_priv *priv = d->driver_data;
3609         unsigned long val;
3610         int ret;
3611
3612         ret = strict_strtoul(buf, 0, &val);
3613         if (ret)
3614                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3615         else
3616                 priv->debug_level = val;
3617
3618         return strnlen(buf, count);
3619 }
3620
3621 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3622                         show_debug_level, store_debug_level);
3623
3624 #endif /* CONFIG_IWLWIFI_DEBUG */
3625
3626 static ssize_t show_temperature(struct device *d,
3627                                 struct device_attribute *attr, char *buf)
3628 {
3629         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3630
3631         if (!iwl_is_alive(priv))
3632                 return -EAGAIN;
3633
3634         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3635 }
3636
3637 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3638
3639 static ssize_t show_tx_power(struct device *d,
3640                              struct device_attribute *attr, char *buf)
3641 {
3642         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3643         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3644 }
3645
3646 static ssize_t store_tx_power(struct device *d,
3647                               struct device_attribute *attr,
3648                               const char *buf, size_t count)
3649 {
3650         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3651         char *p = (char *)buf;
3652         u32 val;
3653
3654         val = simple_strtoul(p, &p, 10);
3655         if (p == buf)
3656                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3657         else
3658                 iwl3945_hw_reg_set_txpower(priv, val);
3659
3660         return count;
3661 }
3662
3663 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3664
3665 static ssize_t show_flags(struct device *d,
3666                           struct device_attribute *attr, char *buf)
3667 {
3668         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3669
3670         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3671 }
3672
3673 static ssize_t store_flags(struct device *d,
3674                            struct device_attribute *attr,
3675                            const char *buf, size_t count)
3676 {
3677         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3678         u32 flags = simple_strtoul(buf, NULL, 0);
3679
3680         mutex_lock(&priv->mutex);
3681         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3682                 /* Cancel any currently running scans... */
3683                 if (iwl_scan_cancel_timeout(priv, 100))
3684                         IWL_WARN(priv, "Could not cancel scan.\n");
3685                 else {
3686                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3687                                        flags);
3688                         priv->staging_rxon.flags = cpu_to_le32(flags);
3689                         iwlcore_commit_rxon(priv);
3690                 }
3691         }
3692         mutex_unlock(&priv->mutex);
3693
3694         return count;
3695 }
3696
3697 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3698
3699 static ssize_t show_filter_flags(struct device *d,
3700                                  struct device_attribute *attr, char *buf)
3701 {
3702         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3703
3704         return sprintf(buf, "0x%04X\n",
3705                 le32_to_cpu(priv->active_rxon.filter_flags));
3706 }
3707
3708 static ssize_t store_filter_flags(struct device *d,
3709                                   struct device_attribute *attr,
3710                                   const char *buf, size_t count)
3711 {
3712         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3713         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3714
3715         mutex_lock(&priv->mutex);
3716         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3717                 /* Cancel any currently running scans... */
3718                 if (iwl_scan_cancel_timeout(priv, 100))
3719                         IWL_WARN(priv, "Could not cancel scan.\n");
3720                 else {
3721                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3722                                        "0x%04X\n", filter_flags);
3723                         priv->staging_rxon.filter_flags =
3724                                 cpu_to_le32(filter_flags);
3725                         iwlcore_commit_rxon(priv);
3726                 }
3727         }
3728         mutex_unlock(&priv->mutex);
3729
3730         return count;
3731 }
3732
3733 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3734                    store_filter_flags);
3735
3736 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3737
3738 static ssize_t show_measurement(struct device *d,
3739                                 struct device_attribute *attr, char *buf)
3740 {
3741         struct iwl_priv *priv = dev_get_drvdata(d);
3742         struct iwl_spectrum_notification measure_report;
3743         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3744         u8 *data = (u8 *)&measure_report;
3745         unsigned long flags;
3746
3747         spin_lock_irqsave(&priv->lock, flags);
3748         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3749                 spin_unlock_irqrestore(&priv->lock, flags);
3750                 return 0;
3751         }
3752         memcpy(&measure_report, &priv->measure_report, size);
3753         priv->measurement_status = 0;
3754         spin_unlock_irqrestore(&priv->lock, flags);
3755
3756         while (size && (PAGE_SIZE - len)) {
3757                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3758                                    PAGE_SIZE - len, 1);
3759                 len = strlen(buf);
3760                 if (PAGE_SIZE - len)
3761                         buf[len++] = '\n';
3762
3763                 ofs += 16;
3764                 size -= min(size, 16U);
3765         }
3766
3767         return len;
3768 }
3769
3770 static ssize_t store_measurement(struct device *d,
3771                                  struct device_attribute *attr,
3772                                  const char *buf, size_t count)
3773 {
3774         struct iwl_priv *priv = dev_get_drvdata(d);
3775         struct ieee80211_measurement_params params = {
3776                 .channel = le16_to_cpu(priv->active_rxon.channel),
3777                 .start_time = cpu_to_le64(priv->last_tsf),
3778                 .duration = cpu_to_le16(1),
3779         };
3780         u8 type = IWL_MEASURE_BASIC;
3781         u8 buffer[32];
3782         u8 channel;
3783
3784         if (count) {
3785                 char *p = buffer;
3786                 strncpy(buffer, buf, min(sizeof(buffer), count));
3787                 channel = simple_strtoul(p, NULL, 0);
3788                 if (channel)
3789                         params.channel = channel;
3790
3791                 p = buffer;
3792                 while (*p && *p != ' ')
3793                         p++;
3794                 if (*p)
3795                         type = simple_strtoul(p + 1, NULL, 0);
3796         }
3797
3798         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3799                        "channel %d (for '%s')\n", type, params.channel, buf);
3800         iwl3945_get_measurement(priv, &params, type);
3801
3802         return count;
3803 }
3804
3805 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3806                    show_measurement, store_measurement);
3807 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3808
3809 static ssize_t store_retry_rate(struct device *d,
3810                                 struct device_attribute *attr,
3811                                 const char *buf, size_t count)
3812 {
3813         struct iwl_priv *priv = dev_get_drvdata(d);
3814
3815         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3816         if (priv->retry_rate <= 0)
3817                 priv->retry_rate = 1;
3818
3819         return count;
3820 }
3821
3822 static ssize_t show_retry_rate(struct device *d,
3823                                struct device_attribute *attr, char *buf)
3824 {
3825         struct iwl_priv *priv = dev_get_drvdata(d);
3826         return sprintf(buf, "%d", priv->retry_rate);
3827 }
3828
3829 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3830                    store_retry_rate);
3831
3832
3833 static ssize_t store_power_level(struct device *d,
3834                                  struct device_attribute *attr,
3835                                  const char *buf, size_t count)
3836 {
3837         struct iwl_priv *priv = dev_get_drvdata(d);
3838         int ret;
3839         unsigned long mode;
3840
3841
3842         mutex_lock(&priv->mutex);
3843
3844         ret = strict_strtoul(buf, 10, &mode);
3845         if (ret)
3846                 goto out;
3847
3848         ret = iwl_power_set_user_mode(priv, mode);
3849         if (ret) {
3850                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3851                 goto out;
3852         }
3853         ret = count;
3854
3855  out:
3856         mutex_unlock(&priv->mutex);
3857         return ret;
3858 }
3859
3860 static ssize_t show_power_level(struct device *d,
3861                                 struct device_attribute *attr, char *buf)
3862 {
3863         struct iwl_priv *priv = dev_get_drvdata(d);
3864         int mode = priv->power_data.user_power_setting;
3865         int system = priv->power_data.system_power_setting;
3866         int level = priv->power_data.power_mode;
3867         char *p = buf;
3868
3869         switch (system) {
3870         case IWL_POWER_SYS_AUTO:
3871                 p += sprintf(p, "SYSTEM:auto");
3872                 break;
3873         case IWL_POWER_SYS_AC:
3874                 p += sprintf(p, "SYSTEM:ac");
3875                 break;
3876         case IWL_POWER_SYS_BATTERY:
3877                 p += sprintf(p, "SYSTEM:battery");
3878                 break;
3879         }
3880
3881         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3882                         "fixed" : "auto");
3883         p += sprintf(p, "\tINDEX:%d", level);
3884         p += sprintf(p, "\n");
3885         return p - buf + 1;
3886 }
3887
3888 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
3889                    show_power_level, store_power_level);
3890
3891 #define MAX_WX_STRING 80
3892
3893 /* Values are in microsecond */
3894 static const s32 timeout_duration[] = {
3895         350000,
3896         250000,
3897         75000,
3898         37000,
3899         25000,
3900 };
3901 static const s32 period_duration[] = {
3902         400000,
3903         700000,
3904         1000000,
3905         1000000,
3906         1000000
3907 };
3908
3909 static ssize_t show_channels(struct device *d,
3910                              struct device_attribute *attr, char *buf)
3911 {
3912         /* all this shit doesn't belong into sysfs anyway */
3913         return 0;
3914 }
3915
3916 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3917
3918 static ssize_t show_statistics(struct device *d,
3919                                struct device_attribute *attr, char *buf)
3920 {
3921         struct iwl_priv *priv = dev_get_drvdata(d);
3922         u32 size = sizeof(struct iwl3945_notif_statistics);
3923         u32 len = 0, ofs = 0;
3924         u8 *data = (u8 *)&priv->statistics_39;
3925         int rc = 0;
3926
3927         if (!iwl_is_alive(priv))
3928                 return -EAGAIN;
3929
3930         mutex_lock(&priv->mutex);
3931         rc = iwl_send_statistics_request(priv, 0);
3932         mutex_unlock(&priv->mutex);
3933
3934         if (rc) {
3935                 len = sprintf(buf,
3936                               "Error sending statistics request: 0x%08X\n", rc);
3937                 return len;
3938         }
3939
3940         while (size && (PAGE_SIZE - len)) {
3941                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3942                                    PAGE_SIZE - len, 1);
3943                 len = strlen(buf);
3944                 if (PAGE_SIZE - len)
3945                         buf[len++] = '\n';
3946
3947                 ofs += 16;
3948                 size -= min(size, 16U);
3949         }
3950
3951         return len;
3952 }
3953
3954 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3955
3956 static ssize_t show_antenna(struct device *d,
3957                             struct device_attribute *attr, char *buf)
3958 {
3959         struct iwl_priv *priv = dev_get_drvdata(d);
3960
3961         if (!iwl_is_alive(priv))
3962                 return -EAGAIN;
3963
3964         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3965 }
3966
3967 static ssize_t store_antenna(struct device *d,
3968                              struct device_attribute *attr,
3969                              const char *buf, size_t count)
3970 {
3971         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3972         int ant;
3973
3974         if (count == 0)
3975                 return 0;
3976
3977         if (sscanf(buf, "%1i", &ant) != 1) {
3978                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3979                 return count;
3980         }
3981
3982         if ((ant >= 0) && (ant <= 2)) {
3983                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3984                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3985         } else
3986                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3987
3988
3989         return count;
3990 }
3991
3992 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3993
3994 static ssize_t show_status(struct device *d,
3995                            struct device_attribute *attr, char *buf)
3996 {
3997         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3998         if (!iwl_is_alive(priv))
3999                 return -EAGAIN;
4000         return sprintf(buf, "0x%08x\n", (int)priv->status);
4001 }
4002
4003 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
4004
4005 static ssize_t dump_error_log(struct device *d,
4006                               struct device_attribute *attr,
4007                               const char *buf, size_t count)
4008 {
4009         char *p = (char *)buf;
4010
4011         if (p[0] == '1')
4012                 iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data);
4013
4014         return strnlen(buf, count);
4015 }
4016
4017 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
4018
4019 static ssize_t dump_event_log(struct device *d,
4020                               struct device_attribute *attr,
4021                               const char *buf, size_t count)
4022 {
4023         char *p = (char *)buf;
4024
4025         if (p[0] == '1')
4026                 iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data);
4027
4028         return strnlen(buf, count);
4029 }
4030
4031 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
4032
4033 /*****************************************************************************
4034  *
4035  * driver setup and tear down
4036  *
4037  *****************************************************************************/
4038
4039 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
4040 {
4041         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
4042
4043         init_waitqueue_head(&priv->wait_command_queue);
4044
4045         INIT_WORK(&priv->up, iwl3945_bg_up);
4046         INIT_WORK(&priv->restart, iwl3945_bg_restart);
4047         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
4048         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
4049         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
4050         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
4051         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
4052         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
4053         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
4054         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
4055         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
4056         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
4057
4058         iwl3945_hw_setup_deferred_work(priv);
4059
4060         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
4061                      iwl3945_irq_tasklet, (unsigned long)priv);
4062 }
4063
4064 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
4065 {
4066         iwl3945_hw_cancel_deferred_work(priv);
4067
4068         cancel_delayed_work_sync(&priv->init_alive_start);
4069         cancel_delayed_work(&priv->scan_check);
4070         cancel_delayed_work(&priv->alive_start);
4071         cancel_work_sync(&priv->beacon_update);
4072 }
4073
4074 static struct attribute *iwl3945_sysfs_entries[] = {
4075         &dev_attr_antenna.attr,
4076         &dev_attr_channels.attr,
4077         &dev_attr_dump_errors.attr,
4078         &dev_attr_dump_events.attr,
4079         &dev_attr_flags.attr,
4080         &dev_attr_filter_flags.attr,
4081 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
4082         &dev_attr_measurement.attr,
4083 #endif
4084         &dev_attr_power_level.attr,
4085         &dev_attr_retry_rate.attr,
4086         &dev_attr_statistics.attr,
4087         &dev_attr_status.attr,
4088         &dev_attr_temperature.attr,
4089         &dev_attr_tx_power.attr,
4090 #ifdef CONFIG_IWLWIFI_DEBUG
4091         &dev_attr_debug_level.attr,
4092 #endif
4093         NULL
4094 };
4095
4096 static struct attribute_group iwl3945_attribute_group = {
4097         .name = NULL,           /* put in device directory */
4098         .attrs = iwl3945_sysfs_entries,
4099 };
4100
4101 static struct ieee80211_ops iwl3945_hw_ops = {
4102         .tx = iwl3945_mac_tx,
4103         .start = iwl3945_mac_start,
4104         .stop = iwl3945_mac_stop,
4105         .add_interface = iwl_mac_add_interface,
4106         .remove_interface = iwl_mac_remove_interface,
4107         .config = iwl_mac_config,
4108         .config_interface = iwl_mac_config_interface,
4109         .configure_filter = iwl_configure_filter,
4110         .set_key = iwl3945_mac_set_key,
4111         .get_tx_stats = iwl_mac_get_tx_stats,
4112         .conf_tx = iwl_mac_conf_tx,
4113         .reset_tsf = iwl_mac_reset_tsf,
4114         .bss_info_changed = iwl_bss_info_changed,
4115         .hw_scan = iwl_mac_hw_scan
4116 };
4117
4118 static int iwl3945_init_drv(struct iwl_priv *priv)
4119 {
4120         int ret;
4121         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4122
4123         priv->retry_rate = 1;
4124         priv->ibss_beacon = NULL;
4125
4126         spin_lock_init(&priv->lock);
4127         spin_lock_init(&priv->power_data.lock);
4128         spin_lock_init(&priv->sta_lock);
4129         spin_lock_init(&priv->hcmd_lock);
4130
4131         INIT_LIST_HEAD(&priv->free_frames);
4132
4133         mutex_init(&priv->mutex);
4134
4135         /* Clear the driver's (not device's) station table */
4136         priv->cfg->ops->smgmt->clear_station_table(priv);
4137
4138         priv->data_retry_limit = -1;
4139         priv->ieee_channels = NULL;
4140         priv->ieee_rates = NULL;
4141         priv->band = IEEE80211_BAND_2GHZ;
4142
4143         priv->iw_mode = NL80211_IFTYPE_STATION;
4144
4145         iwl_reset_qos(priv);
4146
4147         priv->qos_data.qos_active = 0;
4148         priv->qos_data.qos_cap.val = 0;
4149
4150         priv->rates_mask = IWL_RATES_MASK;
4151         /* If power management is turned on, default to CAM mode */
4152         priv->power_mode = IWL_POWER_MODE_CAM;
4153         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
4154
4155         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
4156                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
4157                          eeprom->version);
4158                 ret = -EINVAL;
4159                 goto err;
4160         }
4161         ret = iwl_init_channel_map(priv);
4162         if (ret) {
4163                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
4164                 goto err;
4165         }
4166
4167         /* Set up txpower settings in driver for all channels */
4168         if (iwl3945_txpower_set_from_eeprom(priv)) {
4169                 ret = -EIO;
4170                 goto err_free_channel_map;
4171         }
4172
4173         ret = iwlcore_init_geos(priv);
4174         if (ret) {
4175                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
4176                 goto err_free_channel_map;
4177         }
4178         iwl3945_init_hw_rates(priv, priv->ieee_rates);
4179
4180         return 0;
4181
4182 err_free_channel_map:
4183         iwl_free_channel_map(priv);
4184 err:
4185         return ret;
4186 }
4187
4188 static int iwl3945_setup_mac(struct iwl_priv *priv)
4189 {
4190         int ret;
4191         struct ieee80211_hw *hw = priv->hw;
4192
4193         hw->rate_control_algorithm = "iwl-3945-rs";
4194         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
4195
4196         /* Tell mac80211 our characteristics */
4197         hw->flags = IEEE80211_HW_SIGNAL_DBM |
4198                     IEEE80211_HW_NOISE_DBM |
4199                     IEEE80211_HW_SPECTRUM_MGMT;
4200
4201         hw->wiphy->interface_modes =
4202                 BIT(NL80211_IFTYPE_STATION) |
4203                 BIT(NL80211_IFTYPE_ADHOC);
4204
4205         hw->wiphy->custom_regulatory = true;
4206
4207         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
4208         /* we create the 802.11 header and a zero-length SSID element */
4209         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
4210
4211         /* Default value; 4 EDCA QOS priorities */
4212         hw->queues = 4;
4213
4214         hw->conf.beacon_int = 100;
4215
4216         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4217                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4218                         &priv->bands[IEEE80211_BAND_2GHZ];
4219
4220         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4221                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4222                         &priv->bands[IEEE80211_BAND_5GHZ];
4223
4224         ret = ieee80211_register_hw(priv->hw);
4225         if (ret) {
4226                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
4227                 return ret;
4228         }
4229         priv->mac80211_registered = 1;
4230
4231         return 0;
4232 }
4233
4234 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4235 {
4236         int err = 0;
4237         struct iwl_priv *priv;
4238         struct ieee80211_hw *hw;
4239         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
4240         struct iwl3945_eeprom *eeprom;
4241         unsigned long flags;
4242
4243         /***********************
4244          * 1. Allocating HW data
4245          * ********************/
4246
4247         /* mac80211 allocates memory for this device instance, including
4248          *   space for this driver's private structure */
4249         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
4250         if (hw == NULL) {
4251                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
4252                 err = -ENOMEM;
4253                 goto out;
4254         }
4255         priv = hw->priv;
4256         SET_IEEE80211_DEV(hw, &pdev->dev);
4257
4258         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
4259              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
4260                 IWL_ERR(priv,
4261                         "invalid queues_num, should be between %d and %d\n",
4262                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
4263                 err = -EINVAL;
4264                 goto out_ieee80211_free_hw;
4265         }
4266
4267         /*
4268          * Disabling hardware scan means that mac80211 will perform scans
4269          * "the hard way", rather than using device's scan.
4270          */
4271         if (iwl3945_mod_params.disable_hw_scan) {
4272                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4273                 iwl3945_hw_ops.hw_scan = NULL;
4274         }
4275
4276
4277         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4278         priv->cfg = cfg;
4279         priv->pci_dev = pdev;
4280
4281 #ifdef CONFIG_IWLWIFI_DEBUG
4282         priv->debug_level = iwl3945_mod_params.debug;
4283         atomic_set(&priv->restrict_refcnt, 0);
4284 #endif
4285
4286         /***************************
4287          * 2. Initializing PCI bus
4288          * *************************/
4289         if (pci_enable_device(pdev)) {
4290                 err = -ENODEV;
4291                 goto out_ieee80211_free_hw;
4292         }
4293
4294         pci_set_master(pdev);
4295
4296         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4297         if (!err)
4298                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4299         if (err) {
4300                 IWL_WARN(priv, "No suitable DMA available.\n");
4301                 goto out_pci_disable_device;
4302         }
4303
4304         pci_set_drvdata(pdev, priv);
4305         err = pci_request_regions(pdev, DRV_NAME);
4306         if (err)
4307                 goto out_pci_disable_device;
4308
4309         /***********************
4310          * 3. Read REV Register
4311          * ********************/
4312         priv->hw_base = pci_iomap(pdev, 0, 0);
4313         if (!priv->hw_base) {
4314                 err = -ENODEV;
4315                 goto out_pci_release_regions;
4316         }
4317
4318         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4319                         (unsigned long long) pci_resource_len(pdev, 0));
4320         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4321
4322         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4323          * PCI Tx retries from interfering with C3 CPU state */
4324         pci_write_config_byte(pdev, 0x41, 0x00);
4325
4326         /* amp init */
4327         err = priv->cfg->ops->lib->apm_ops.init(priv);
4328         if (err < 0) {
4329                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
4330                 goto out_iounmap;
4331         }
4332
4333         /***********************
4334          * 4. Read EEPROM
4335          * ********************/
4336
4337         /* Read the EEPROM */
4338         err = iwl_eeprom_init(priv);
4339         if (err) {
4340                 IWL_ERR(priv, "Unable to init EEPROM\n");
4341                 goto out_iounmap;
4342         }
4343         /* MAC Address location in EEPROM same for 3945/4965 */
4344         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4345         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4346         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4347         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4348
4349         /***********************
4350          * 5. Setup HW Constants
4351          * ********************/
4352         /* Device-specific setup */
4353         if (iwl3945_hw_set_hw_params(priv)) {
4354                 IWL_ERR(priv, "failed to set hw settings\n");
4355                 goto out_eeprom_free;
4356         }
4357
4358         /***********************
4359          * 6. Setup priv
4360          * ********************/
4361
4362         err = iwl3945_init_drv(priv);
4363         if (err) {
4364                 IWL_ERR(priv, "initializing driver failed\n");
4365                 goto out_unset_hw_params;
4366         }
4367
4368         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4369                 priv->cfg->name);
4370
4371         /***********************
4372          * 7. Setup Services
4373          * ********************/
4374
4375         spin_lock_irqsave(&priv->lock, flags);
4376         iwl_disable_interrupts(priv);
4377         spin_unlock_irqrestore(&priv->lock, flags);
4378
4379         pci_enable_msi(priv->pci_dev);
4380
4381         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
4382                           DRV_NAME, priv);
4383         if (err) {
4384                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4385                 goto out_disable_msi;
4386         }
4387
4388         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4389         if (err) {
4390                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4391                 goto out_release_irq;
4392         }
4393
4394         iwl_set_rxon_channel(priv,
4395                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4396         iwl3945_setup_deferred_work(priv);
4397         iwl3945_setup_rx_handlers(priv);
4398
4399         /*********************************
4400          * 8. Setup and Register mac80211
4401          * *******************************/
4402
4403         iwl_enable_interrupts(priv);
4404
4405         err = iwl3945_setup_mac(priv);
4406         if (err)
4407                 goto  out_remove_sysfs;
4408
4409         err = iwl_dbgfs_register(priv, DRV_NAME);
4410         if (err)
4411                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4412
4413         err = iwl_rfkill_init(priv);
4414         if (err)
4415                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
4416                                   "Ignoring error: %d\n", err);
4417         else
4418                 iwl_rfkill_set_hw_state(priv);
4419
4420         /* Start monitoring the killswitch */
4421         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4422                            2 * HZ);
4423
4424         return 0;
4425
4426  out_remove_sysfs:
4427         destroy_workqueue(priv->workqueue);
4428         priv->workqueue = NULL;
4429         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4430  out_release_irq:
4431         free_irq(priv->pci_dev->irq, priv);
4432  out_disable_msi:
4433         pci_disable_msi(priv->pci_dev);
4434         iwlcore_free_geos(priv);
4435         iwl_free_channel_map(priv);
4436  out_unset_hw_params:
4437         iwl3945_unset_hw_params(priv);
4438  out_eeprom_free:
4439         iwl_eeprom_free(priv);
4440  out_iounmap:
4441         pci_iounmap(pdev, priv->hw_base);
4442  out_pci_release_regions:
4443         pci_release_regions(pdev);
4444  out_pci_disable_device:
4445         pci_set_drvdata(pdev, NULL);
4446         pci_disable_device(pdev);
4447  out_ieee80211_free_hw:
4448         ieee80211_free_hw(priv->hw);
4449  out:
4450         return err;
4451 }
4452
4453 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4454 {
4455         struct iwl_priv *priv = pci_get_drvdata(pdev);
4456         unsigned long flags;
4457
4458         if (!priv)
4459                 return;
4460
4461         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4462
4463         iwl_dbgfs_unregister(priv);
4464
4465         set_bit(STATUS_EXIT_PENDING, &priv->status);
4466
4467         if (priv->mac80211_registered) {
4468                 ieee80211_unregister_hw(priv->hw);
4469                 priv->mac80211_registered = 0;
4470         } else {
4471                 iwl3945_down(priv);
4472         }
4473
4474         /* make sure we flush any pending irq or
4475          * tasklet for the driver
4476          */
4477         spin_lock_irqsave(&priv->lock, flags);
4478         iwl_disable_interrupts(priv);
4479         spin_unlock_irqrestore(&priv->lock, flags);
4480
4481         iwl_synchronize_irq(priv);
4482
4483         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4484
4485         iwl_rfkill_unregister(priv);
4486         cancel_delayed_work_sync(&priv->rfkill_poll);
4487
4488         iwl3945_dealloc_ucode_pci(priv);
4489
4490         if (priv->rxq.bd)
4491                 iwl3945_rx_queue_free(priv, &priv->rxq);
4492         iwl3945_hw_txq_ctx_free(priv);
4493
4494         iwl3945_unset_hw_params(priv);
4495         priv->cfg->ops->smgmt->clear_station_table(priv);
4496
4497         /*netif_stop_queue(dev); */
4498         flush_workqueue(priv->workqueue);
4499
4500         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4501          * priv->workqueue... so we can't take down the workqueue
4502          * until now... */
4503         destroy_workqueue(priv->workqueue);
4504         priv->workqueue = NULL;
4505
4506         free_irq(pdev->irq, priv);
4507         pci_disable_msi(pdev);
4508
4509         pci_iounmap(pdev, priv->hw_base);
4510         pci_release_regions(pdev);
4511         pci_disable_device(pdev);
4512         pci_set_drvdata(pdev, NULL);
4513
4514         iwl_free_channel_map(priv);
4515         iwlcore_free_geos(priv);
4516         kfree(priv->scan);
4517         if (priv->ibss_beacon)
4518                 dev_kfree_skb(priv->ibss_beacon);
4519
4520         ieee80211_free_hw(priv->hw);
4521 }
4522
4523
4524 /*****************************************************************************
4525  *
4526  * driver and module entry point
4527  *
4528  *****************************************************************************/
4529
4530 static struct pci_driver iwl3945_driver = {
4531         .name = DRV_NAME,
4532         .id_table = iwl3945_hw_card_ids,
4533         .probe = iwl3945_pci_probe,
4534         .remove = __devexit_p(iwl3945_pci_remove),
4535 #ifdef CONFIG_PM
4536         .suspend = iwl_pci_suspend,
4537         .resume = iwl_pci_resume,
4538 #endif
4539 };
4540
4541 static int __init iwl3945_init(void)
4542 {
4543
4544         int ret;
4545         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4546         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4547
4548         ret = iwl3945_rate_control_register();
4549         if (ret) {
4550                 printk(KERN_ERR DRV_NAME
4551                        "Unable to register rate control algorithm: %d\n", ret);
4552                 return ret;
4553         }
4554
4555         ret = pci_register_driver(&iwl3945_driver);
4556         if (ret) {
4557                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4558                 goto error_register;
4559         }
4560
4561         return ret;
4562
4563 error_register:
4564         iwl3945_rate_control_unregister();
4565         return ret;
4566 }
4567
4568 static void __exit iwl3945_exit(void)
4569 {
4570         pci_unregister_driver(&iwl3945_driver);
4571         iwl3945_rate_control_unregister();
4572 }
4573
4574 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4575
4576 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4577 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4578 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4579 MODULE_PARM_DESC(swcrypto,
4580                  "using software crypto (default 1 [software])\n");
4581 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
4582 MODULE_PARM_DESC(debug, "debug output mask");
4583 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4584 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4585
4586 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
4587 MODULE_PARM_DESC(queues_num, "number of hw queues.");
4588
4589 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4590 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4591
4592 module_exit(iwl3945_exit);
4593 module_init(iwl3945_init);