git.oblomov.eu Git - linux-2.6/blob - 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
1466
1467 /* Convert linear signal-to-noise ratio into dB */
1468 static u8 ratio2dB[100] = {
1469 /*       0   1   2   3   4   5   6   7   8   9 */
1470          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1471         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1472         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1473         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1474         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1475         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1476         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1477         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1478         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1479         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1480 };
1481
1482 /* Calculates a relative dB value from a ratio of linear
1483  *   (i.e. not dB) signal levels.
1484  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1485 int iwl3945_calc_db_from_ratio(int sig_ratio)
1486 {
1487         /* 1000:1 or higher just report as 60 dB */
1488         if (sig_ratio >= 1000)
1489                 return 60;
1490
1491         /* 100:1 or higher, divide by 10 and use table,
1492          *   add 20 dB to make up for divide by 10 */
1493         if (sig_ratio >= 100)
1494                 return 20 + (int)ratio2dB[sig_ratio/10];
1495
1496         /* We shouldn't see this */
1497         if (sig_ratio < 1)
1498                 return 0;
1499
1500         /* Use table for ratios 1:1 - 99:1 */
1501         return (int)ratio2dB[sig_ratio];
1502 }
1503
1504 #define PERFECT_RSSI (-20) /* dBm */
1505 #define WORST_RSSI (-95)   /* dBm */
1506 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1507
1508 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1509  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1510  *   about formulas used below. */
1511 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1512 {
1513         int sig_qual;
1514         int degradation = PERFECT_RSSI - rssi_dbm;
1515
1516         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1517          * as indicator; formula is (signal dbm - noise dbm).
1518          * SNR at or above 40 is a great signal (100%).
1519          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1520          * Weakest usable signal is usually 10 - 15 dB SNR. */
1521         if (noise_dbm) {
1522                 if (rssi_dbm - noise_dbm >= 40)
1523                         return 100;
1524                 else if (rssi_dbm < noise_dbm)
1525                         return 0;
1526                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1527
1528         /* Else use just the signal level.
1529          * This formula is a least squares fit of data points collected and
1530          *   compared with a reference system that had a percentage (%) display
1531          *   for signal quality. */
1532         } else
1533                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1534                             (15 * RSSI_RANGE + 62 * degradation)) /
1535                            (RSSI_RANGE * RSSI_RANGE);
1536
1537         if (sig_qual > 100)
1538                 sig_qual = 100;
1539         else if (sig_qual < 1)
1540                 sig_qual = 0;
1541
1542         return sig_qual;
1543 }
1544
1545 /**
1546  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1547  *
1548  * Uses the priv->rx_handlers callback function array to invoke
1549  * the appropriate handlers, including command responses,
1550  * frame-received notifications, and other notifications.
1551  */
1552 static void iwl3945_rx_handle(struct iwl_priv *priv)
1553 {
1554         struct iwl_rx_mem_buffer *rxb;
1555         struct iwl_rx_packet *pkt;
1556         struct iwl_rx_queue *rxq = &priv->rxq;
1557         u32 r, i;
1558         int reclaim;
1559         unsigned long flags;
1560         u8 fill_rx = 0;
1561         u32 count = 8;
1562
1563         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1564          * buffer that the driver may process (last buffer filled by ucode). */
1565         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1566         i = rxq->read;
1567
1568         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1569                 fill_rx = 1;
1570         /* Rx interrupt, but nothing sent from uCode */
1571         if (i == r)
1572                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1573
1574         while (i != r) {
1575                 rxb = rxq->queue[i];
1576
1577                 /* If an RXB doesn't have a Rx queue slot associated with it,
1578                  * then a bug has been introduced in the queue refilling
1579                  * routines -- catch it here */
1580                 BUG_ON(rxb == NULL);
1581
1582                 rxq->queue[i] = NULL;
1583
1584                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1585                                 priv->hw_params.rx_buf_size,
1586                                 PCI_DMA_FROMDEVICE);
1587                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1588
1589                 /* Reclaim a command buffer only if this packet is a response
1590                  *   to a (driver-originated) command.
1591                  * If the packet (e.g. Rx frame) originated from uCode,
1592                  *   there is no command buffer to reclaim.
1593                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1594                  *   but apparently a few don't get set; catch them here. */
1595                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1596                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1597                         (pkt->hdr.cmd != REPLY_TX);
1598
1599                 /* Based on type of command response or notification,
1600                  *   handle those that need handling via function in
1601                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1602                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1603                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1604                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1605                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1606                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1607                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1608                 } else {
1609                         /* No handling needed */
1610                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1611                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1612                                 r, i, get_cmd_string(pkt->hdr.cmd),
1613                                 pkt->hdr.cmd);
1614                 }
1615
1616                 if (reclaim) {
1617                         /* Invoke any callbacks, transfer the skb to caller, and
1618                          * fire off the (possibly) blocking iwl_send_cmd()
1619                          * as we reclaim the driver command queue */
1620                         if (rxb && rxb->skb)
1621                                 iwl_tx_cmd_complete(priv, rxb);
1622                         else
1623                                 IWL_WARN(priv, "Claim null rxb?\n");
1624                 }
1625
1626                 /* For now we just don't re-use anything.  We can tweak this
1627                  * later to try and re-use notification packets and SKBs that
1628                  * fail to Rx correctly */
1629                 if (rxb->skb != NULL) {
1630                         priv->alloc_rxb_skb--;
1631                         dev_kfree_skb_any(rxb->skb);
1632                         rxb->skb = NULL;
1633                 }
1634
1635                 spin_lock_irqsave(&rxq->lock, flags);
1636                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1637                 spin_unlock_irqrestore(&rxq->lock, flags);
1638                 i = (i + 1) & RX_QUEUE_MASK;
1639                 /* If there are a lot of unused frames,
1640                  * restock the Rx queue so ucode won't assert. */
1641                 if (fill_rx) {
1642                         count++;
1643                         if (count >= 8) {
1644                                 priv->rxq.read = i;
1645                                 __iwl3945_rx_replenish(priv);
1646                                 count = 0;
1647                         }
1648                 }
1649         }
1650
1651         /* Backtrack one entry */
1652         priv->rxq.read = i;
1653         iwl3945_rx_queue_restock(priv);
1654 }
1655
1656 /* call this function to flush any scheduled tasklet */
1657 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1658 {
1659         /* wait to make sure we flush pending tasklet*/
1660         synchronize_irq(priv->pci_dev->irq);
1661         tasklet_kill(&priv->irq_tasklet);
1662 }
1663
1664 static const char *desc_lookup(int i)
1665 {
1666         switch (i) {
1667         case 1:
1668                 return "FAIL";
1669         case 2:
1670                 return "BAD_PARAM";
1671         case 3:
1672                 return "BAD_CHECKSUM";
1673         case 4:
1674                 return "NMI_INTERRUPT";
1675         case 5:
1676                 return "SYSASSERT";
1677         case 6:
1678                 return "FATAL_ERROR";
1679         }
1680
1681         return "UNKNOWN";
1682 }
1683
1684 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1685 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1686
1687 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1688 {
1689         u32 i;
1690         u32 desc, time, count, base, data1;
1691         u32 blink1, blink2, ilink1, ilink2;
1692         int rc;
1693
1694         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1695
1696         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1697                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1698                 return;
1699         }
1700
1701         rc = iwl_grab_nic_access(priv);
1702         if (rc) {
1703                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1704                 return;
1705         }
1706
1707         count = iwl_read_targ_mem(priv, base);
1708
1709         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1710                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1711                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1712                         priv->status, count);
1713         }
1714
1715         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1716                   "ilink1  nmiPC   Line\n");
1717         for (i = ERROR_START_OFFSET;
1718              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1719              i += ERROR_ELEM_SIZE) {
1720                 desc = iwl_read_targ_mem(priv, base + i);
1721                 time =
1722                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1723                 blink1 =
1724                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1725                 blink2 =
1726                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1727                 ilink1 =
1728                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1729                 ilink2 =
1730                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1731                 data1 =
1732                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1733
1734                 IWL_ERR(priv,
1735                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1736                         desc_lookup(desc), desc, time, blink1, blink2,
1737                         ilink1, ilink2, data1);
1738         }
1739
1740         iwl_release_nic_access(priv);
1741
1742 }
1743
1744 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1745
1746 /**
1747  * iwl3945_print_event_log - Dump error event log to syslog
1748  *
1749  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1750  */
1751 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1752                                 u32 num_events, u32 mode)
1753 {
1754         u32 i;
1755         u32 base;       /* SRAM byte address of event log header */
1756         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1757         u32 ptr;        /* SRAM byte address of log data */
1758         u32 ev, time, data; /* event log data */
1759
1760         if (num_events == 0)
1761                 return;
1762
1763         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1764
1765         if (mode == 0)
1766                 event_size = 2 * sizeof(u32);
1767         else
1768                 event_size = 3 * sizeof(u32);
1769
1770         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1771
1772         /* "time" is actually "data" for mode 0 (no timestamp).
1773          * place event id # at far right for easier visual parsing. */
1774         for (i = 0; i < num_events; i++) {
1775                 ev = iwl_read_targ_mem(priv, ptr);
1776                 ptr += sizeof(u32);
1777                 time = iwl_read_targ_mem(priv, ptr);
1778                 ptr += sizeof(u32);
1779                 if (mode == 0) {
1780                         /* data, ev */
1781                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1782                 } else {
1783                         data = iwl_read_targ_mem(priv, ptr);
1784                         ptr += sizeof(u32);
1785                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1786                 }
1787         }
1788 }
1789
1790 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1791 {
1792         int rc;
1793         u32 base;       /* SRAM byte address of event log header */
1794         u32 capacity;   /* event log capacity in # entries */
1795         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1796         u32 num_wraps;  /* # times uCode wrapped to top of log */
1797         u32 next_entry; /* index of next entry to be written by uCode */
1798         u32 size;       /* # entries that we'll print */
1799
1800         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1801         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1802                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1803                 return;
1804         }
1805
1806         rc = iwl_grab_nic_access(priv);
1807         if (rc) {
1808                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1809                 return;
1810         }
1811
1812         /* event log header */
1813         capacity = iwl_read_targ_mem(priv, base);
1814         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1815         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1816         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1817
1818         size = num_wraps ? capacity : next_entry;
1819
1820         /* bail out if nothing in log */
1821         if (size == 0) {
1822                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1823                 iwl_release_nic_access(priv);
1824                 return;
1825         }
1826
1827         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1828                   size, num_wraps);
1829
1830         /* if uCode has wrapped back to top of log, start at the oldest entry,
1831          * i.e the next one that uCode would fill. */
1832         if (num_wraps)
1833                 iwl3945_print_event_log(priv, next_entry,
1834                                     capacity - next_entry, mode);
1835
1836         /* (then/else) start at top of log */
1837         iwl3945_print_event_log(priv, 0, next_entry, mode);
1838
1839         iwl_release_nic_access(priv);
1840 }
1841
1842 static void iwl3945_error_recovery(struct iwl_priv *priv)
1843 {
1844         unsigned long flags;
1845
1846         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1847                sizeof(priv->staging_rxon));
1848         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1849         iwlcore_commit_rxon(priv);
1850
1851         priv->cfg->ops->smgmt->add_station(priv, priv->bssid, 1, 0, NULL);
1852
1853         spin_lock_irqsave(&priv->lock, flags);
1854         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1855         priv->error_recovering = 0;
1856         spin_unlock_irqrestore(&priv->lock, flags);
1857 }
1858
1859 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1860 {
1861         u32 inta, handled = 0;
1862         u32 inta_fh;
1863         unsigned long flags;
1864 #ifdef CONFIG_IWLWIFI_DEBUG
1865         u32 inta_mask;
1866 #endif
1867
1868         spin_lock_irqsave(&priv->lock, flags);
1869
1870         /* Ack/clear/reset pending uCode interrupts.
1871          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1872          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1873         inta = iwl_read32(priv, CSR_INT);
1874         iwl_write32(priv, CSR_INT, inta);
1875
1876         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1877          * Any new interrupts that happen after this, either while we're
1878          * in this tasklet, or later, will show up in next ISR/tasklet. */
1879         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1880         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1881
1882 #ifdef CONFIG_IWLWIFI_DEBUG
1883         if (priv->debug_level & IWL_DL_ISR) {
1884                 /* just for debug */
1885                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1886                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1887                               inta, inta_mask, inta_fh);
1888         }
1889 #endif
1890
1891         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1892          * atomic, make sure that inta covers all the interrupts that
1893          * we've discovered, even if FH interrupt came in just after
1894          * reading CSR_INT. */
1895         if (inta_fh & CSR39_FH_INT_RX_MASK)
1896                 inta |= CSR_INT_BIT_FH_RX;
1897         if (inta_fh & CSR39_FH_INT_TX_MASK)
1898                 inta |= CSR_INT_BIT_FH_TX;
1899
1900         /* Now service all interrupt bits discovered above. */
1901         if (inta & CSR_INT_BIT_HW_ERR) {
1902                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1903
1904                 /* Tell the device to stop sending interrupts */
1905                 iwl_disable_interrupts(priv);
1906
1907                 priv->isr_stats.hw++;
1908                 iwl_irq_handle_error(priv);
1909
1910                 handled |= CSR_INT_BIT_HW_ERR;
1911
1912                 spin_unlock_irqrestore(&priv->lock, flags);
1913
1914                 return;
1915         }
1916
1917 #ifdef CONFIG_IWLWIFI_DEBUG
1918         if (priv->debug_level & (IWL_DL_ISR)) {
1919                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1920                 if (inta & CSR_INT_BIT_SCD) {
1921                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1922                                       "the frame/frames.\n");
1923                         priv->isr_stats.sch++;
1924                 }
1925
1926                 /* Alive notification via Rx interrupt will do the real work */
1927                 if (inta & CSR_INT_BIT_ALIVE) {
1928                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1929                         priv->isr_stats.alive++;
1930                 }
1931         }
1932 #endif
1933         /* Safely ignore these bits for debug checks below */
1934         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1935
1936         /* Error detected by uCode */
1937         if (inta & CSR_INT_BIT_SW_ERR) {
1938                 IWL_ERR(priv, "Microcode SW error detected. "
1939                         "Restarting 0x%X.\n", inta);
1940                 priv->isr_stats.sw++;
1941                 priv->isr_stats.sw_err = inta;
1942                 iwl_irq_handle_error(priv);
1943                 handled |= CSR_INT_BIT_SW_ERR;
1944         }
1945
1946         /* uCode wakes up after power-down sleep */
1947         if (inta & CSR_INT_BIT_WAKEUP) {
1948                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1949                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1950                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1951                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1952                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1953                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1954                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1955                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1956
1957                 priv->isr_stats.wakeup++;
1958                 handled |= CSR_INT_BIT_WAKEUP;
1959         }
1960
1961         /* All uCode command responses, including Tx command responses,
1962          * Rx "responses" (frame-received notification), and other
1963          * notifications from uCode come through here*/
1964         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1965                 iwl3945_rx_handle(priv);
1966                 priv->isr_stats.rx++;
1967                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1968         }
1969
1970         if (inta & CSR_INT_BIT_FH_TX) {
1971                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1972                 priv->isr_stats.tx++;
1973
1974                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1975                 if (!iwl_grab_nic_access(priv)) {
1976                         iwl_write_direct32(priv, FH39_TCSR_CREDIT
1977                                              (FH39_SRVC_CHNL), 0x0);
1978                         iwl_release_nic_access(priv);
1979                 }
1980                 handled |= CSR_INT_BIT_FH_TX;
1981         }
1982
1983         if (inta & ~handled) {
1984                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1985                 priv->isr_stats.unhandled++;
1986         }
1987
1988         if (inta & ~CSR_INI_SET_MASK) {
1989                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1990                          inta & ~CSR_INI_SET_MASK);
1991                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1992         }
1993
1994         /* Re-enable all interrupts */
1995         /* only Re-enable if disabled by irq */
1996         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1997                 iwl_enable_interrupts(priv);
1998
1999 #ifdef CONFIG_IWLWIFI_DEBUG
2000         if (priv->debug_level & (IWL_DL_ISR)) {
2001                 inta = iwl_read32(priv, CSR_INT);
2002                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
2003                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2004                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
2005                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
2006         }
2007 #endif
2008         spin_unlock_irqrestore(&priv->lock, flags);
2009 }
2010
2011 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
2012                                          enum ieee80211_band band,
2013                                      u8 is_active, u8 n_probes,
2014                                      struct iwl3945_scan_channel *scan_ch)
2015 {
2016         const struct ieee80211_channel *channels = NULL;
2017         const struct ieee80211_supported_band *sband;
2018         const struct iwl_channel_info *ch_info;
2019         u16 passive_dwell = 0;
2020         u16 active_dwell = 0;
2021         int added, i;
2022
2023         sband = iwl_get_hw_mode(priv, band);
2024         if (!sband)
2025                 return 0;
2026
2027         channels = sband->channels;
2028
2029         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
2030         passive_dwell = iwl_get_passive_dwell_time(priv, band);
2031
2032         if (passive_dwell <= active_dwell)
2033                 passive_dwell = active_dwell + 1;
2034
2035         for (i = 0, added = 0; i < sband->n_channels; i++) {
2036                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
2037                         continue;
2038
2039                 scan_ch->channel = channels[i].hw_value;
2040
2041                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
2042                 if (!is_channel_valid(ch_info)) {
2043                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
2044                                        scan_ch->channel);
2045                         continue;
2046                 }
2047
2048                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
2049                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
2050                 /* If passive , set up for auto-switch
2051                  *  and use long active_dwell time.
2052                  */
2053                 if (!is_active || is_channel_passive(ch_info) ||
2054                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
2055                         scan_ch->type = 0;      /* passive */
2056                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
2057                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
2058                 } else {
2059                         scan_ch->type = 1;      /* active */
2060                 }
2061
2062                 /* Set direct probe bits. These may be used both for active
2063                  * scan channels (probes gets sent right away),
2064                  * or for passive channels (probes get se sent only after
2065                  * hearing clear Rx packet).*/
2066                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
2067                         if (n_probes)
2068                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2069                 } else {
2070                         /* uCode v1 does not allow setting direct probe bits on
2071                          * passive channel. */
2072                         if ((scan_ch->type & 1) && n_probes)
2073                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
2074                 }
2075
2076                 /* Set txpower levels to defaults */
2077                 scan_ch->tpc.dsp_atten = 110;
2078                 /* scan_pwr_info->tpc.dsp_atten; */
2079
2080                 /*scan_pwr_info->tpc.tx_gain; */
2081                 if (band == IEEE80211_BAND_5GHZ)
2082                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
2083                 else {
2084                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
2085                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
2086                          * power level:
2087                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
2088                          */
2089                 }
2090
2091                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
2092                                scan_ch->channel,
2093                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
2094                                (scan_ch->type & 1) ?
2095                                active_dwell : passive_dwell);
2096
2097                 scan_ch++;
2098                 added++;
2099         }
2100
2101         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
2102         return added;
2103 }
2104
2105 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
2106                               struct ieee80211_rate *rates)
2107 {
2108         int i;
2109
2110         for (i = 0; i < IWL_RATE_COUNT; i++) {
2111                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
2112                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
2113                 rates[i].hw_value_short = i;
2114                 rates[i].flags = 0;
2115                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
2116                         /*
2117                          * If CCK != 1M then set short preamble rate flag.
2118                          */
2119                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
2120                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
2121                 }
2122         }
2123 }
2124
2125 /******************************************************************************
2126  *
2127  * uCode download functions
2128  *
2129  ******************************************************************************/
2130
2131 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2132 {
2133         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2134         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2135         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2136         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2137         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2138         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2139 }
2140
2141 /**
2142  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2143  *     looking at all data.
2144  */
2145 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2146 {
2147         u32 val;
2148         u32 save_len = len;
2149         int rc = 0;
2150         u32 errcnt;
2151
2152         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2153
2154         rc = iwl_grab_nic_access(priv);
2155         if (rc)
2156                 return rc;
2157
2158         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2159                                IWL39_RTC_INST_LOWER_BOUND);
2160
2161         errcnt = 0;
2162         for (; len > 0; len -= sizeof(u32), image++) {
2163                 /* read data comes through single port, auto-incr addr */
2164                 /* NOTE: Use the debugless read so we don't flood kernel log
2165                  * if IWL_DL_IO is set */
2166                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2167                 if (val != le32_to_cpu(*image)) {
2168                         IWL_ERR(priv, "uCode INST section is invalid at "
2169                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2170                                   save_len - len, val, le32_to_cpu(*image));
2171                         rc = -EIO;
2172                         errcnt++;
2173                         if (errcnt >= 20)
2174                                 break;
2175                 }
2176         }
2177
2178         iwl_release_nic_access(priv);
2179
2180         if (!errcnt)
2181                 IWL_DEBUG_INFO(priv,
2182                         "ucode image in INSTRUCTION memory is good\n");
2183
2184         return rc;
2185 }
2186
2187
2188 /**
2189  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2190  *   using sample data 100 bytes apart.  If these sample points are good,
2191  *   it's a pretty good bet that everything between them is good, too.
2192  */
2193 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2194 {
2195         u32 val;
2196         int rc = 0;
2197         u32 errcnt = 0;
2198         u32 i;
2199
2200         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2201
2202         rc = iwl_grab_nic_access(priv);
2203         if (rc)
2204                 return rc;
2205
2206         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2207                 /* read data comes through single port, auto-incr addr */
2208                 /* NOTE: Use the debugless read so we don't flood kernel log
2209                  * if IWL_DL_IO is set */
2210                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2211                         i + IWL39_RTC_INST_LOWER_BOUND);
2212                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2213                 if (val != le32_to_cpu(*image)) {
2214 #if 0 /* Enable this if you want to see details */
2215                         IWL_ERR(priv, "uCode INST section is invalid at "
2216                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2217                                   i, val, *image);
2218 #endif
2219                         rc = -EIO;
2220                         errcnt++;
2221                         if (errcnt >= 3)
2222                                 break;
2223                 }
2224         }
2225
2226         iwl_release_nic_access(priv);
2227
2228         return rc;
2229 }
2230
2231
2232 /**
2233  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2234  *    and verify its contents
2235  */
2236 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2237 {
2238         __le32 *image;
2239         u32 len;
2240         int rc = 0;
2241
2242         /* Try bootstrap */
2243         image = (__le32 *)priv->ucode_boot.v_addr;
2244         len = priv->ucode_boot.len;
2245         rc = iwl3945_verify_inst_sparse(priv, image, len);
2246         if (rc == 0) {
2247                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2248                 return 0;
2249         }
2250
2251         /* Try initialize */
2252         image = (__le32 *)priv->ucode_init.v_addr;
2253         len = priv->ucode_init.len;
2254         rc = iwl3945_verify_inst_sparse(priv, image, len);
2255         if (rc == 0) {
2256                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2257                 return 0;
2258         }
2259
2260         /* Try runtime/protocol */
2261         image = (__le32 *)priv->ucode_code.v_addr;
2262         len = priv->ucode_code.len;
2263         rc = iwl3945_verify_inst_sparse(priv, image, len);
2264         if (rc == 0) {
2265                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2266                 return 0;
2267         }
2268
2269         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2270
2271         /* Since nothing seems to match, show first several data entries in
2272          * instruction SRAM, so maybe visual inspection will give a clue.
2273          * Selection of bootstrap image (vs. other images) is arbitrary. */
2274         image = (__le32 *)priv->ucode_boot.v_addr;
2275         len = priv->ucode_boot.len;
2276         rc = iwl3945_verify_inst_full(priv, image, len);
2277
2278         return rc;
2279 }
2280
2281 static void iwl3945_nic_start(struct iwl_priv *priv)
2282 {
2283         /* Remove all resets to allow NIC to operate */
2284         iwl_write32(priv, CSR_RESET, 0);
2285 }
2286
2287 /**
2288  * iwl3945_read_ucode - Read uCode images from disk file.
2289  *
2290  * Copy into buffers for card to fetch via bus-mastering
2291  */
2292 static int iwl3945_read_ucode(struct iwl_priv *priv)
2293 {
2294         struct iwl_ucode *ucode;
2295         int ret = -EINVAL, index;
2296         const struct firmware *ucode_raw;
2297         /* firmware file name contains uCode/driver compatibility version */
2298         const char *name_pre = priv->cfg->fw_name_pre;
2299         const unsigned int api_max = priv->cfg->ucode_api_max;
2300         const unsigned int api_min = priv->cfg->ucode_api_min;
2301         char buf[25];
2302         u8 *src;
2303         size_t len;
2304         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2305
2306         /* Ask kernel firmware_class module to get the boot firmware off disk.
2307          * request_firmware() is synchronous, file is in memory on return. */
2308         for (index = api_max; index >= api_min; index--) {
2309                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2310                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2311                 if (ret < 0) {
2312                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2313                                   buf, ret);
2314                         if (ret == -ENOENT)
2315                                 continue;
2316                         else
2317                                 goto error;
2318                 } else {
2319                         if (index < api_max)
2320                                 IWL_ERR(priv, "Loaded firmware %s, "
2321                                         "which is deprecated. "
2322                                         " Please use API v%u instead.\n",
2323                                           buf, api_max);
2324                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2325                                        "(%zd bytes) from disk\n",
2326                                        buf, ucode_raw->size);
2327                         break;
2328                 }
2329         }
2330
2331         if (ret < 0)
2332                 goto error;
2333
2334         /* Make sure that we got at least our header! */
2335         if (ucode_raw->size < sizeof(*ucode)) {
2336                 IWL_ERR(priv, "File size way too small!\n");
2337                 ret = -EINVAL;
2338                 goto err_release;
2339         }
2340
2341         /* Data from ucode file:  header followed by uCode images */
2342         ucode = (void *)ucode_raw->data;
2343
2344         priv->ucode_ver = le32_to_cpu(ucode->ver);
2345         api_ver = IWL_UCODE_API(priv->ucode_ver);
2346         inst_size = le32_to_cpu(ucode->inst_size);
2347         data_size = le32_to_cpu(ucode->data_size);
2348         init_size = le32_to_cpu(ucode->init_size);
2349         init_data_size = le32_to_cpu(ucode->init_data_size);
2350         boot_size = le32_to_cpu(ucode->boot_size);
2351
2352         /* api_ver should match the api version forming part of the
2353          * firmware filename ... but we don't check for that and only rely
2354          * on the API version read from firmware header from here on forward */
2355
2356         if (api_ver < api_min || api_ver > api_max) {
2357                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2358                           "Driver supports v%u, firmware is v%u.\n",
2359                           api_max, api_ver);
2360                 priv->ucode_ver = 0;
2361                 ret = -EINVAL;
2362                 goto err_release;
2363         }
2364         if (api_ver != api_max)
2365                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2366                           "got %u. New firmware can be obtained "
2367                           "from http://www.intellinuxwireless.org.\n",
2368                           api_max, api_ver);
2369
2370         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2371                 IWL_UCODE_MAJOR(priv->ucode_ver),
2372                 IWL_UCODE_MINOR(priv->ucode_ver),
2373                 IWL_UCODE_API(priv->ucode_ver),
2374                 IWL_UCODE_SERIAL(priv->ucode_ver));
2375
2376         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2377                        priv->ucode_ver);
2378         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2379                        inst_size);
2380         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2381                        data_size);
2382         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2383                        init_size);
2384         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2385                        init_data_size);
2386         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2387                        boot_size);
2388
2389
2390         /* Verify size of file vs. image size info in file's header */
2391         if (ucode_raw->size < sizeof(*ucode) +
2392                 inst_size + data_size + init_size +
2393                 init_data_size + boot_size) {
2394
2395                 IWL_DEBUG_INFO(priv, "uCode file size %zd too small\n",
2396                                ucode_raw->size);
2397                 ret = -EINVAL;
2398                 goto err_release;
2399         }
2400
2401         /* Verify that uCode images will fit in card's SRAM */
2402         if (inst_size > IWL39_MAX_INST_SIZE) {
2403                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2404                                inst_size);
2405                 ret = -EINVAL;
2406                 goto err_release;
2407         }
2408
2409         if (data_size > IWL39_MAX_DATA_SIZE) {
2410                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2411                                data_size);
2412                 ret = -EINVAL;
2413                 goto err_release;
2414         }
2415         if (init_size > IWL39_MAX_INST_SIZE) {
2416                 IWL_DEBUG_INFO(priv,
2417                                 "uCode init instr len %d too large to fit in\n",
2418                                 init_size);
2419                 ret = -EINVAL;
2420                 goto err_release;
2421         }
2422         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2423                 IWL_DEBUG_INFO(priv,
2424                                 "uCode init data len %d too large to fit in\n",
2425                                 init_data_size);
2426                 ret = -EINVAL;
2427                 goto err_release;
2428         }
2429         if (boot_size > IWL39_MAX_BSM_SIZE) {
2430                 IWL_DEBUG_INFO(priv,
2431                                 "uCode boot instr len %d too large to fit in\n",
2432                                 boot_size);
2433                 ret = -EINVAL;
2434                 goto err_release;
2435         }
2436
2437         /* Allocate ucode buffers for card's bus-master loading ... */
2438
2439         /* Runtime instructions and 2 copies of data:
2440          * 1) unmodified from disk
2441          * 2) backup cache for save/restore during power-downs */
2442         priv->ucode_code.len = inst_size;
2443         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2444
2445         priv->ucode_data.len = data_size;
2446         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2447
2448         priv->ucode_data_backup.len = data_size;
2449         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2450
2451         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2452             !priv->ucode_data_backup.v_addr)
2453                 goto err_pci_alloc;
2454
2455         /* Initialization instructions and data */
2456         if (init_size && init_data_size) {
2457                 priv->ucode_init.len = init_size;
2458                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2459
2460                 priv->ucode_init_data.len = init_data_size;
2461                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2462
2463                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2464                         goto err_pci_alloc;
2465         }
2466
2467         /* Bootstrap (instructions only, no data) */
2468         if (boot_size) {
2469                 priv->ucode_boot.len = boot_size;
2470                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2471
2472                 if (!priv->ucode_boot.v_addr)
2473                         goto err_pci_alloc;
2474         }
2475
2476         /* Copy images into buffers for card's bus-master reads ... */
2477
2478         /* Runtime instructions (first block of data in file) */
2479         src = &ucode->data[0];
2480         len = priv->ucode_code.len;
2481         IWL_DEBUG_INFO(priv,
2482                 "Copying (but not loading) uCode instr len %zd\n", len);
2483         memcpy(priv->ucode_code.v_addr, src, len);
2484         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2485                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2486
2487         /* Runtime data (2nd block)
2488          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2489         src = &ucode->data[inst_size];
2490         len = priv->ucode_data.len;
2491         IWL_DEBUG_INFO(priv,
2492                 "Copying (but not loading) uCode data len %zd\n", len);
2493         memcpy(priv->ucode_data.v_addr, src, len);
2494         memcpy(priv->ucode_data_backup.v_addr, src, len);
2495
2496         /* Initialization instructions (3rd block) */
2497         if (init_size) {
2498                 src = &ucode->data[inst_size + data_size];
2499                 len = priv->ucode_init.len;
2500                 IWL_DEBUG_INFO(priv,
2501                         "Copying (but not loading) init instr len %zd\n", len);
2502                 memcpy(priv->ucode_init.v_addr, src, len);
2503         }
2504
2505         /* Initialization data (4th block) */
2506         if (init_data_size) {
2507                 src = &ucode->data[inst_size + data_size + init_size];
2508                 len = priv->ucode_init_data.len;
2509                 IWL_DEBUG_INFO(priv,
2510                         "Copying (but not loading) init data len %zd\n", len);
2511                 memcpy(priv->ucode_init_data.v_addr, src, len);
2512         }
2513
2514         /* Bootstrap instructions (5th block) */
2515         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
2516         len = priv->ucode_boot.len;
2517         IWL_DEBUG_INFO(priv,
2518                 "Copying (but not loading) boot instr len %zd\n", len);
2519         memcpy(priv->ucode_boot.v_addr, src, len);
2520
2521         /* We have our copies now, allow OS release its copies */
2522         release_firmware(ucode_raw);
2523         return 0;
2524
2525  err_pci_alloc:
2526         IWL_ERR(priv, "failed to allocate pci memory\n");
2527         ret = -ENOMEM;
2528         iwl3945_dealloc_ucode_pci(priv);
2529
2530  err_release:
2531         release_firmware(ucode_raw);
2532
2533  error:
2534         return ret;
2535 }
2536
2537
2538 /**
2539  * iwl3945_set_ucode_ptrs - Set uCode address location
2540  *
2541  * Tell initialization uCode where to find runtime uCode.
2542  *
2543  * BSM registers initially contain pointers to initialization uCode.
2544  * We need to replace them to load runtime uCode inst and data,
2545  * and to save runtime data when powering down.
2546  */
2547 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2548 {
2549         dma_addr_t pinst;
2550         dma_addr_t pdata;
2551         int rc = 0;
2552         unsigned long flags;
2553
2554         /* bits 31:0 for 3945 */
2555         pinst = priv->ucode_code.p_addr;
2556         pdata = priv->ucode_data_backup.p_addr;
2557
2558         spin_lock_irqsave(&priv->lock, flags);
2559         rc = iwl_grab_nic_access(priv);
2560         if (rc) {
2561                 spin_unlock_irqrestore(&priv->lock, flags);
2562                 return rc;
2563         }
2564
2565         /* Tell bootstrap uCode where to find image to load */
2566         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2567         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2568         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2569                                  priv->ucode_data.len);
2570
2571         /* Inst byte count must be last to set up, bit 31 signals uCode
2572          *   that all new ptr/size info is in place */
2573         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2574                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2575
2576         iwl_release_nic_access(priv);
2577
2578         spin_unlock_irqrestore(&priv->lock, flags);
2579
2580         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2581
2582         return rc;
2583 }
2584
2585 /**
2586  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2587  *
2588  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2589  *
2590  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2591  */
2592 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2593 {
2594         /* Check alive response for "valid" sign from uCode */
2595         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2596                 /* We had an error bringing up the hardware, so take it
2597                  * all the way back down so we can try again */
2598                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2599                 goto restart;
2600         }
2601
2602         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2603          * This is a paranoid check, because we would not have gotten the
2604          * "initialize" alive if code weren't properly loaded.  */
2605         if (iwl3945_verify_ucode(priv)) {
2606                 /* Runtime instruction load was bad;
2607                  * take it all the way back down so we can try again */
2608                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2609                 goto restart;
2610         }
2611
2612         /* Send pointers to protocol/runtime uCode image ... init code will
2613          * load and launch runtime uCode, which will send us another "Alive"
2614          * notification. */
2615         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2616         if (iwl3945_set_ucode_ptrs(priv)) {
2617                 /* Runtime instruction load won't happen;
2618                  * take it all the way back down so we can try again */
2619                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2620                 goto restart;
2621         }
2622         return;
2623
2624  restart:
2625         queue_work(priv->workqueue, &priv->restart);
2626 }
2627
2628 /**
2629  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2630  *                   from protocol/runtime uCode (initialization uCode's
2631  *                   Alive gets handled by iwl3945_init_alive_start()).
2632  */
2633 static void iwl3945_alive_start(struct iwl_priv *priv)
2634 {
2635         int rc = 0;
2636         int thermal_spin = 0;
2637         u32 rfkill;
2638
2639         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2640
2641         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2642                 /* We had an error bringing up the hardware, so take it
2643                  * all the way back down so we can try again */
2644                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2645                 goto restart;
2646         }
2647
2648         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2649          * This is a paranoid check, because we would not have gotten the
2650          * "runtime" alive if code weren't properly loaded.  */
2651         if (iwl3945_verify_ucode(priv)) {
2652                 /* Runtime instruction load was bad;
2653                  * take it all the way back down so we can try again */
2654                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2655                 goto restart;
2656         }
2657
2658         priv->cfg->ops->smgmt->clear_station_table(priv);
2659
2660         rc = iwl_grab_nic_access(priv);
2661         if (rc) {
2662                 IWL_WARN(priv, "Can not read RFKILL status from adapter\n");
2663                 return;
2664         }
2665
2666         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2667         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2668         iwl_release_nic_access(priv);
2669
2670         if (rfkill & 0x1) {
2671                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2672                 /* if RFKILL is not on, then wait for thermal
2673                  * sensor in adapter to kick in */
2674                 while (iwl3945_hw_get_temperature(priv) == 0) {
2675                         thermal_spin++;
2676                         udelay(10);
2677                 }
2678
2679                 if (thermal_spin)
2680                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2681                                        thermal_spin * 10);
2682         } else
2683                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2684
2685         /* After the ALIVE response, we can send commands to 3945 uCode */
2686         set_bit(STATUS_ALIVE, &priv->status);
2687
2688         /* Clear out the uCode error bit if it is set */
2689         clear_bit(STATUS_FW_ERROR, &priv->status);
2690
2691         if (iwl_is_rfkill(priv))
2692                 return;
2693
2694         ieee80211_wake_queues(priv->hw);
2695
2696         priv->active_rate = priv->rates_mask;
2697         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2698
2699         iwl_power_update_mode(priv, false);
2700
2701         if (iwl_is_associated(priv)) {
2702                 struct iwl3945_rxon_cmd *active_rxon =
2703                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2704
2705                 memcpy(&priv->staging_rxon, &priv->active_rxon,
2706                        sizeof(priv->staging_rxon));
2707                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2708         } else {
2709                 /* Initialize our rx_config data */
2710                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2711         }
2712
2713         /* Configure Bluetooth device coexistence support */
2714         iwl_send_bt_config(priv);
2715
2716         /* Configure the adapter for unassociated operation */
2717         iwlcore_commit_rxon(priv);
2718
2719         iwl3945_reg_txpower_periodic(priv);
2720
2721         iwl3945_led_register(priv);
2722
2723         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2724         set_bit(STATUS_READY, &priv->status);
2725         wake_up_interruptible(&priv->wait_command_queue);
2726
2727         if (priv->error_recovering)
2728                 iwl3945_error_recovery(priv);
2729
2730         /* reassociate for ADHOC mode */
2731         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2732                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2733                                                                 priv->vif);
2734                 if (beacon)
2735                         iwl_mac_beacon_update(priv->hw, beacon);
2736         }
2737
2738         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2739                 iwl_set_mode(priv, priv->iw_mode);
2740
2741         return;
2742
2743  restart:
2744         queue_work(priv->workqueue, &priv->restart);
2745 }
2746
2747 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2748
2749 static void __iwl3945_down(struct iwl_priv *priv)
2750 {
2751         unsigned long flags;
2752         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2753         struct ieee80211_conf *conf = NULL;
2754
2755         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2756
2757         conf = ieee80211_get_hw_conf(priv->hw);
2758
2759         if (!exit_pending)
2760                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2761
2762         iwl3945_led_unregister(priv);
2763         priv->cfg->ops->smgmt->clear_station_table(priv);
2764
2765         /* Unblock any waiting calls */
2766         wake_up_interruptible_all(&priv->wait_command_queue);
2767
2768         /* Wipe out the EXIT_PENDING status bit if we are not actually
2769          * exiting the module */
2770         if (!exit_pending)
2771                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2772
2773         /* stop and reset the on-board processor */
2774         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2775
2776         /* tell the device to stop sending interrupts */
2777         spin_lock_irqsave(&priv->lock, flags);
2778         iwl_disable_interrupts(priv);
2779         spin_unlock_irqrestore(&priv->lock, flags);
2780         iwl_synchronize_irq(priv);
2781
2782         if (priv->mac80211_registered)
2783                 ieee80211_stop_queues(priv->hw);
2784
2785         /* If we have not previously called iwl3945_init() then
2786          * clear all bits but the RF Kill bits and return */
2787         if (!iwl_is_init(priv)) {
2788                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2789                                         STATUS_RF_KILL_HW |
2790                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2791                                         STATUS_RF_KILL_SW |
2792                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2793                                         STATUS_GEO_CONFIGURED |
2794                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2795                                         STATUS_EXIT_PENDING;
2796                 goto exit;
2797         }
2798
2799         /* ...otherwise clear out all the status bits but the RF Kill
2800          * bits and continue taking the NIC down. */
2801         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2802                                 STATUS_RF_KILL_HW |
2803                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2804                                 STATUS_RF_KILL_SW |
2805                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2806                                 STATUS_GEO_CONFIGURED |
2807                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2808                                 STATUS_FW_ERROR |
2809                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2810                                 STATUS_EXIT_PENDING;
2811
2812         priv->cfg->ops->lib->apm_ops.reset(priv);
2813         spin_lock_irqsave(&priv->lock, flags);
2814         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2815         spin_unlock_irqrestore(&priv->lock, flags);
2816
2817         iwl3945_hw_txq_ctx_stop(priv);
2818         iwl3945_hw_rxq_stop(priv);
2819
2820         spin_lock_irqsave(&priv->lock, flags);
2821         if (!iwl_grab_nic_access(priv)) {
2822                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2823                                          APMG_CLK_VAL_DMA_CLK_RQT);
2824                 iwl_release_nic_access(priv);
2825         }
2826         spin_unlock_irqrestore(&priv->lock, flags);
2827
2828         udelay(5);
2829
2830         if (exit_pending)
2831                 priv->cfg->ops->lib->apm_ops.stop(priv);
2832         else
2833                 priv->cfg->ops->lib->apm_ops.reset(priv);
2834
2835  exit:
2836         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2837
2838         if (priv->ibss_beacon)
2839                 dev_kfree_skb(priv->ibss_beacon);
2840         priv->ibss_beacon = NULL;
2841
2842         /* clear out any free frames */
2843         iwl3945_clear_free_frames(priv);
2844 }
2845
2846 static void iwl3945_down(struct iwl_priv *priv)
2847 {
2848         mutex_lock(&priv->mutex);
2849         __iwl3945_down(priv);
2850         mutex_unlock(&priv->mutex);
2851
2852         iwl3945_cancel_deferred_work(priv);
2853 }
2854
2855 #define MAX_HW_RESTARTS 5
2856
2857 static int __iwl3945_up(struct iwl_priv *priv)
2858 {
2859         int rc, i;
2860
2861         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2862                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2863                 return -EIO;
2864         }
2865
2866         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
2867                 IWL_WARN(priv, "Radio disabled by SW RF kill (module "
2868                             "parameter)\n");
2869                 return -ENODEV;
2870         }
2871
2872         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2873                 IWL_ERR(priv, "ucode not available for device bring up\n");
2874                 return -EIO;
2875         }
2876
2877         /* If platform's RF_KILL switch is NOT set to KILL */
2878         if (iwl_read32(priv, CSR_GP_CNTRL) &
2879                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2880                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2881         else {
2882                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2883                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2884                 return -ENODEV;
2885         }
2886
2887         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2888
2889         rc = iwl3945_hw_nic_init(priv);
2890         if (rc) {
2891                 IWL_ERR(priv, "Unable to int nic\n");
2892                 return rc;
2893         }
2894
2895         /* make sure rfkill handshake bits are cleared */
2896         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2897         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2898                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2899
2900         /* clear (again), then enable host interrupts */
2901         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2902         iwl_enable_interrupts(priv);
2903
2904         /* really make sure rfkill handshake bits are cleared */
2905         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2906         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2907
2908         /* Copy original ucode data image from disk into backup cache.
2909          * This will be used to initialize the on-board processor's
2910          * data SRAM for a clean start when the runtime program first loads. */
2911         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2912                priv->ucode_data.len);
2913
2914         /* We return success when we resume from suspend and rf_kill is on. */
2915         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2916                 return 0;
2917
2918         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2919
2920                 priv->cfg->ops->smgmt->clear_station_table(priv);
2921
2922                 /* load bootstrap state machine,
2923                  * load bootstrap program into processor's memory,
2924                  * prepare to load the "initialize" uCode */
2925                 priv->cfg->ops->lib->load_ucode(priv);
2926
2927                 if (rc) {
2928                         IWL_ERR(priv,
2929                                 "Unable to set up bootstrap uCode: %d\n", rc);
2930                         continue;
2931                 }
2932
2933                 /* start card; "initialize" will load runtime ucode */
2934                 iwl3945_nic_start(priv);
2935
2936                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2937
2938                 return 0;
2939         }
2940
2941         set_bit(STATUS_EXIT_PENDING, &priv->status);
2942         __iwl3945_down(priv);
2943         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2944
2945         /* tried to restart and config the device for as long as our
2946          * patience could withstand */
2947         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2948         return -EIO;
2949 }
2950
2951
2952 /*****************************************************************************
2953  *
2954  * Workqueue callbacks
2955  *
2956  *****************************************************************************/
2957
2958 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2959 {
2960         struct iwl_priv *priv =
2961             container_of(data, struct iwl_priv, init_alive_start.work);
2962
2963         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2964                 return;
2965
2966         mutex_lock(&priv->mutex);
2967         iwl3945_init_alive_start(priv);
2968         mutex_unlock(&priv->mutex);
2969 }
2970
2971 static void iwl3945_bg_alive_start(struct work_struct *data)
2972 {
2973         struct iwl_priv *priv =
2974             container_of(data, struct iwl_priv, alive_start.work);
2975
2976         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2977                 return;
2978
2979         mutex_lock(&priv->mutex);
2980         iwl3945_alive_start(priv);
2981         mutex_unlock(&priv->mutex);
2982 }
2983
2984 static void iwl3945_rfkill_poll(struct work_struct *data)
2985 {
2986         struct iwl_priv *priv =
2987             container_of(data, struct iwl_priv, rfkill_poll.work);
2988         unsigned long status = priv->status;
2989
2990         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2991                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2992         else
2993                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2994
2995         if (test_bit(STATUS_RF_KILL_HW, &status) != test_bit(STATUS_RF_KILL_HW, &priv->status))
2996                 queue_work(priv->workqueue, &priv->rf_kill);
2997
2998         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2999                            round_jiffies_relative(2 * HZ));
3000
3001 }
3002
3003 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
3004 static void iwl3945_bg_request_scan(struct work_struct *data)
3005 {
3006         struct iwl_priv *priv =
3007             container_of(data, struct iwl_priv, request_scan);
3008         struct iwl_host_cmd cmd = {
3009                 .id = REPLY_SCAN_CMD,
3010                 .len = sizeof(struct iwl3945_scan_cmd),
3011                 .meta.flags = CMD_SIZE_HUGE,
3012         };
3013         int rc = 0;
3014         struct iwl3945_scan_cmd *scan;
3015         struct ieee80211_conf *conf = NULL;
3016         u8 n_probes = 0;
3017         enum ieee80211_band band;
3018         bool is_active = false;
3019
3020         conf = ieee80211_get_hw_conf(priv->hw);
3021
3022         mutex_lock(&priv->mutex);
3023
3024         if (!iwl_is_ready(priv)) {
3025                 IWL_WARN(priv, "request scan called when driver not ready.\n");
3026                 goto done;
3027         }
3028
3029         /* Make sure the scan wasn't canceled before this queued work
3030          * was given the chance to run... */
3031         if (!test_bit(STATUS_SCANNING, &priv->status))
3032                 goto done;
3033
3034         /* This should never be called or scheduled if there is currently
3035          * a scan active in the hardware. */
3036         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
3037                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
3038                                 "Ignoring second request.\n");
3039                 rc = -EIO;
3040                 goto done;
3041         }
3042
3043         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
3044                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
3045                 goto done;
3046         }
3047
3048         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3049                 IWL_DEBUG_HC(priv,
3050                         "Scan request while abort pending. Queuing.\n");
3051                 goto done;
3052         }
3053
3054         if (iwl_is_rfkill(priv)) {
3055                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
3056                 goto done;
3057         }
3058
3059         if (!test_bit(STATUS_READY, &priv->status)) {
3060                 IWL_DEBUG_HC(priv,
3061                         "Scan request while uninitialized. Queuing.\n");
3062                 goto done;
3063         }
3064
3065         if (!priv->scan_bands) {
3066                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
3067                 goto done;
3068         }
3069
3070         if (!priv->scan) {
3071                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
3072                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
3073                 if (!priv->scan) {
3074                         rc = -ENOMEM;
3075                         goto done;
3076                 }
3077         }
3078         scan = priv->scan;
3079         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
3080
3081         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
3082         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
3083
3084         if (iwl_is_associated(priv)) {
3085                 u16 interval = 0;
3086                 u32 extra;
3087                 u32 suspend_time = 100;
3088                 u32 scan_suspend_time = 100;
3089                 unsigned long flags;
3090
3091                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
3092
3093                 spin_lock_irqsave(&priv->lock, flags);
3094                 interval = priv->beacon_int;
3095                 spin_unlock_irqrestore(&priv->lock, flags);
3096
3097                 scan->suspend_time = 0;
3098                 scan->max_out_time = cpu_to_le32(200 * 1024);
3099                 if (!interval)
3100                         interval = suspend_time;
3101                 /*
3102                  * suspend time format:
3103                  *  0-19: beacon interval in usec (time before exec.)
3104                  * 20-23: 0
3105                  * 24-31: number of beacons (suspend between channels)
3106                  */
3107
3108                 extra = (suspend_time / interval) << 24;
3109                 scan_suspend_time = 0xFF0FFFFF &
3110                     (extra | ((suspend_time % interval) * 1024));
3111
3112                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
3113                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
3114                                scan_suspend_time, interval);
3115         }
3116
3117         if (priv->scan_request->n_ssids) {
3118                 int i, p = 0;
3119                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
3120                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
3121                         /* always does wildcard anyway */
3122                         if (!priv->scan_request->ssids[i].ssid_len)
3123                                 continue;
3124                         scan->direct_scan[p].id = WLAN_EID_SSID;
3125                         scan->direct_scan[p].len =
3126                                 priv->scan_request->ssids[i].ssid_len;
3127                         memcpy(scan->direct_scan[p].ssid,
3128                                priv->scan_request->ssids[i].ssid,
3129                                priv->scan_request->ssids[i].ssid_len);
3130                         n_probes++;
3131                         p++;
3132                 }
3133                 is_active = true;
3134         } else
3135                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
3136
3137         /* We don't build a direct scan probe request; the uCode will do
3138          * that based on the direct_mask added to each channel entry */
3139         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
3140         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
3141         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3142
3143         /* flags + rate selection */
3144
3145         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
3146                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
3147                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
3148                 scan->good_CRC_th = 0;
3149                 band = IEEE80211_BAND_2GHZ;
3150         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
3151                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
3152                 /*
3153                  * If active scaning is requested but a certain channel
3154                  * is marked passive, we can do active scanning if we
3155                  * detect transmissions.
3156                  */
3157                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
3158                 band = IEEE80211_BAND_5GHZ;
3159         } else {
3160                 IWL_WARN(priv, "Invalid scan band count\n");
3161                 goto done;
3162         }
3163
3164         scan->tx_cmd.len = cpu_to_le16(
3165                         iwl_fill_probe_req(priv,
3166                                 (struct ieee80211_mgmt *)scan->data,
3167                                 priv->scan_request->ie,
3168                                 priv->scan_request->ie_len,
3169                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3170
3171         /* select Rx antennas */
3172         scan->flags |= iwl3945_get_antenna_flags(priv);
3173
3174         if (iwl_is_monitor_mode(priv))
3175                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3176
3177         scan->channel_count =
3178                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3179                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3180
3181         if (scan->channel_count == 0) {
3182                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3183                 goto done;
3184         }
3185
3186         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3187             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3188         cmd.data = scan;
3189         scan->len = cpu_to_le16(cmd.len);
3190
3191         set_bit(STATUS_SCAN_HW, &priv->status);
3192         rc = iwl_send_cmd_sync(priv, &cmd);
3193         if (rc)
3194                 goto done;
3195
3196         queue_delayed_work(priv->workqueue, &priv->scan_check,
3197                            IWL_SCAN_CHECK_WATCHDOG);
3198
3199         mutex_unlock(&priv->mutex);
3200         return;
3201
3202  done:
3203         /* can not perform scan make sure we clear scanning
3204          * bits from status so next scan request can be performed.
3205          * if we dont clear scanning status bit here all next scan
3206          * will fail
3207         */
3208         clear_bit(STATUS_SCAN_HW, &priv->status);
3209         clear_bit(STATUS_SCANNING, &priv->status);
3210
3211         /* inform mac80211 scan aborted */
3212         queue_work(priv->workqueue, &priv->scan_completed);
3213         mutex_unlock(&priv->mutex);
3214 }
3215
3216 static void iwl3945_bg_up(struct work_struct *data)
3217 {
3218         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3219
3220         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3221                 return;
3222
3223         mutex_lock(&priv->mutex);
3224         __iwl3945_up(priv);
3225         mutex_unlock(&priv->mutex);
3226         iwl_rfkill_set_hw_state(priv);
3227 }
3228
3229 static void iwl3945_bg_restart(struct work_struct *data)
3230 {
3231         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3232
3233         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3234                 return;
3235
3236         iwl3945_down(priv);
3237         queue_work(priv->workqueue, &priv->up);
3238 }
3239
3240 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3241 {
3242         struct iwl_priv *priv =
3243             container_of(data, struct iwl_priv, rx_replenish);
3244
3245         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3246                 return;
3247
3248         mutex_lock(&priv->mutex);
3249         iwl3945_rx_replenish(priv);
3250         mutex_unlock(&priv->mutex);
3251 }
3252
3253 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3254
3255 void iwl3945_post_associate(struct iwl_priv *priv)
3256 {
3257         int rc = 0;
3258         struct ieee80211_conf *conf = NULL;
3259
3260         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3261                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3262                 return;
3263         }
3264
3265
3266         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3267                         priv->assoc_id, priv->active_rxon.bssid_addr);
3268
3269         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3270                 return;
3271
3272         if (!priv->vif || !priv->is_open)
3273                 return;
3274
3275         iwl_scan_cancel_timeout(priv, 200);
3276
3277         conf = ieee80211_get_hw_conf(priv->hw);
3278
3279         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3280         iwlcore_commit_rxon(priv);
3281
3282         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3283         iwl3945_setup_rxon_timing(priv);
3284         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3285                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3286         if (rc)
3287                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3288                             "Attempting to continue.\n");
3289
3290         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3291
3292         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3293
3294         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3295                         priv->assoc_id, priv->beacon_int);
3296
3297         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3298                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3299         else
3300                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3301
3302         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3303                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3304                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3305                 else
3306                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3307
3308                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3309                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3310
3311         }
3312
3313         iwlcore_commit_rxon(priv);
3314
3315         switch (priv->iw_mode) {
3316         case NL80211_IFTYPE_STATION:
3317                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3318                 break;
3319
3320         case NL80211_IFTYPE_ADHOC:
3321
3322                 priv->assoc_id = 1;
3323                 priv->cfg->ops->smgmt->add_station(priv, priv->bssid, 0, 0, NULL);
3324                 iwl3945_sync_sta(priv, IWL_STA_ID,
3325                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3326                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3327                                  CMD_ASYNC);
3328                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3329                 iwl3945_send_beacon_cmd(priv);
3330
3331                 break;
3332
3333         default:
3334                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3335                            __func__, priv->iw_mode);
3336                 break;
3337         }
3338
3339         iwl_activate_qos(priv, 0);
3340
3341         /* we have just associated, don't start scan too early */
3342         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3343 }
3344
3345 /*****************************************************************************
3346  *
3347  * mac80211 entry point functions
3348  *
3349  *****************************************************************************/
3350
3351 #define UCODE_READY_TIMEOUT     (2 * HZ)
3352
3353 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3354 {
3355         struct iwl_priv *priv = hw->priv;
3356         int ret;
3357
3358         IWL_DEBUG_MAC80211(priv, "enter\n");
3359
3360         /* we should be verifying the device is ready to be opened */
3361         mutex_lock(&priv->mutex);
3362
3363         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
3364         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3365          * ucode filename and max sizes are card-specific. */
3366
3367         if (!priv->ucode_code.len) {
3368                 ret = iwl3945_read_ucode(priv);
3369                 if (ret) {
3370                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3371                         mutex_unlock(&priv->mutex);
3372                         goto out_release_irq;
3373                 }
3374         }
3375
3376         ret = __iwl3945_up(priv);
3377
3378         mutex_unlock(&priv->mutex);
3379
3380         iwl_rfkill_set_hw_state(priv);
3381
3382         if (ret)
3383                 goto out_release_irq;
3384
3385         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3386
3387         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3388          * mac80211 will not be run successfully. */
3389         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3390                         test_bit(STATUS_READY, &priv->status),
3391                         UCODE_READY_TIMEOUT);
3392         if (!ret) {
3393                 if (!test_bit(STATUS_READY, &priv->status)) {
3394                         IWL_ERR(priv,
3395                                 "Wait for START_ALIVE timeout after %dms.\n",
3396                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3397                         ret = -ETIMEDOUT;
3398                         goto out_release_irq;
3399                 }
3400         }
3401
3402         /* ucode is running and will send rfkill notifications,
3403          * no need to poll the killswitch state anymore */
3404         cancel_delayed_work(&priv->rfkill_poll);
3405
3406         priv->is_open = 1;
3407         IWL_DEBUG_MAC80211(priv, "leave\n");
3408         return 0;
3409
3410 out_release_irq:
3411         priv->is_open = 0;
3412         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3413         return ret;
3414 }
3415
3416 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3417 {
3418         struct iwl_priv *priv = hw->priv;
3419
3420         IWL_DEBUG_MAC80211(priv, "enter\n");
3421
3422         if (!priv->is_open) {
3423                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3424                 return;
3425         }
3426
3427         priv->is_open = 0;
3428
3429         if (iwl_is_ready_rf(priv)) {
3430                 /* stop mac, cancel any scan request and clear
3431                  * RXON_FILTER_ASSOC_MSK BIT
3432                  */
3433                 mutex_lock(&priv->mutex);
3434                 iwl_scan_cancel_timeout(priv, 100);
3435                 mutex_unlock(&priv->mutex);
3436         }
3437
3438         iwl3945_down(priv);
3439
3440         flush_workqueue(priv->workqueue);
3441
3442         /* start polling the killswitch state again */
3443         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3444                            round_jiffies_relative(2 * HZ));
3445
3446         IWL_DEBUG_MAC80211(priv, "leave\n");
3447 }
3448
3449 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3450 {
3451         struct iwl_priv *priv = hw->priv;
3452
3453         IWL_DEBUG_MAC80211(priv, "enter\n");
3454
3455         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3456                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3457
3458         if (iwl3945_tx_skb(priv, skb))
3459                 dev_kfree_skb_any(skb);
3460
3461         IWL_DEBUG_MAC80211(priv, "leave\n");
3462         return NETDEV_TX_OK;
3463 }
3464
3465 void iwl3945_config_ap(struct iwl_priv *priv)
3466 {
3467         int rc = 0;
3468
3469         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3470                 return;
3471
3472         /* The following should be done only at AP bring up */
3473         if (!(iwl_is_associated(priv))) {
3474
3475                 /* RXON - unassoc (to set timing command) */
3476                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3477                 iwlcore_commit_rxon(priv);
3478
3479                 /* RXON Timing */
3480                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3481                 iwl3945_setup_rxon_timing(priv);
3482                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3483                                       sizeof(priv->rxon_timing),
3484                                       &priv->rxon_timing);
3485                 if (rc)
3486                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3487                                         "Attempting to continue.\n");
3488
3489                 /* FIXME: what should be the assoc_id for AP? */
3490                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3491                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3492                         priv->staging_rxon.flags |=
3493                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3494                 else
3495                         priv->staging_rxon.flags &=
3496                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3497
3498                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3499                         if (priv->assoc_capability &
3500                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3501                                 priv->staging_rxon.flags |=
3502                                         RXON_FLG_SHORT_SLOT_MSK;
3503                         else
3504                                 priv->staging_rxon.flags &=
3505                                         ~RXON_FLG_SHORT_SLOT_MSK;
3506
3507                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3508                                 priv->staging_rxon.flags &=
3509                                         ~RXON_FLG_SHORT_SLOT_MSK;
3510                 }
3511                 /* restore RXON assoc */
3512                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3513                 iwlcore_commit_rxon(priv);
3514                 priv->cfg->ops->smgmt->add_station(priv, iwl_bcast_addr, 0, 0, NULL);
3515         }
3516         iwl3945_send_beacon_cmd(priv);
3517
3518         /* FIXME - we need to add code here to detect a totally new
3519          * configuration, reset the AP, unassoc, rxon timing, assoc,
3520          * clear sta table, add BCAST sta... */
3521 }
3522
3523 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3524                                struct ieee80211_vif *vif,
3525                                struct ieee80211_sta *sta,
3526                                struct ieee80211_key_conf *key)
3527 {
3528         struct iwl_priv *priv = hw->priv;
3529         const u8 *addr;
3530         int ret = 0;
3531         u8 sta_id = IWL_INVALID_STATION;
3532         u8 static_key;
3533
3534         IWL_DEBUG_MAC80211(priv, "enter\n");
3535
3536         if (iwl3945_mod_params.sw_crypto) {
3537                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3538                 return -EOPNOTSUPP;
3539         }
3540
3541         addr = sta ? sta->addr : iwl_bcast_addr;
3542         static_key = !iwl_is_associated(priv);
3543
3544         if (!static_key) {
3545                 sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
3546                 if (sta_id == IWL_INVALID_STATION) {
3547                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3548                                             addr);
3549                         return -EINVAL;
3550                 }
3551         }
3552
3553         mutex_lock(&priv->mutex);
3554         iwl_scan_cancel_timeout(priv, 100);
3555         mutex_unlock(&priv->mutex);
3556
3557         switch (cmd) {
3558         case SET_KEY:
3559                 if (static_key)
3560                         ret = iwl3945_set_static_key(priv, key);
3561                 else
3562                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3563                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3564                 break;
3565         case DISABLE_KEY:
3566                 if (static_key)
3567                         ret = iwl3945_remove_static_key(priv);
3568                 else
3569                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3570                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3571                 break;
3572         default:
3573                 ret = -EINVAL;
3574         }
3575
3576         IWL_DEBUG_MAC80211(priv, "leave\n");
3577
3578         return ret;
3579 }
3580
3581 /*****************************************************************************
3582  *
3583  * sysfs attributes
3584  *
3585  *****************************************************************************/
3586
3587 #ifdef CONFIG_IWLWIFI_DEBUG
3588
3589 /*
3590  * The following adds a new attribute to the sysfs representation
3591  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3592  * used for controlling the debug level.
3593  *
3594  * See the level definitions in iwl for details.
3595  */
3596 static ssize_t show_debug_level(struct device *d,
3597                                 struct device_attribute *attr, char *buf)
3598 {
3599         struct iwl_priv *priv = d->driver_data;
3600
3601         return sprintf(buf, "0x%08X\n", priv->debug_level);
3602 }
3603 static ssize_t store_debug_level(struct device *d,
3604                                 struct device_attribute *attr,
3605                                  const char *buf, size_t count)
3606 {
3607         struct iwl_priv *priv = d->driver_data;
3608         unsigned long val;
3609         int ret;
3610
3611         ret = strict_strtoul(buf, 0, &val);
3612         if (ret)
3613                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3614         else
3615                 priv->debug_level = val;
3616
3617         return strnlen(buf, count);
3618 }
3619
3620 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3621                         show_debug_level, store_debug_level);
3622
3623 #endif /* CONFIG_IWLWIFI_DEBUG */
3624
3625 static ssize_t show_temperature(struct device *d,
3626                                 struct device_attribute *attr, char *buf)
3627 {
3628         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3629
3630         if (!iwl_is_alive(priv))
3631                 return -EAGAIN;
3632
3633         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3634 }
3635
3636 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3637
3638 static ssize_t show_tx_power(struct device *d,
3639                              struct device_attribute *attr, char *buf)
3640 {
3641         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3642         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3643 }
3644
3645 static ssize_t store_tx_power(struct device *d,
3646                               struct device_attribute *attr,
3647                               const char *buf, size_t count)
3648 {
3649         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3650         char *p = (char *)buf;
3651         u32 val;
3652
3653         val = simple_strtoul(p, &p, 10);
3654         if (p == buf)
3655                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3656         else
3657                 iwl3945_hw_reg_set_txpower(priv, val);
3658
3659         return count;
3660 }
3661
3662 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3663
3664 static ssize_t show_flags(struct device *d,
3665                           struct device_attribute *attr, char *buf)
3666 {
3667         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3668
3669         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3670 }
3671
3672 static ssize_t store_flags(struct device *d,
3673                            struct device_attribute *attr,
3674                            const char *buf, size_t count)
3675 {
3676         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3677         u32 flags = simple_strtoul(buf, NULL, 0);
3678
3679         mutex_lock(&priv->mutex);
3680         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3681                 /* Cancel any currently running scans... */
3682                 if (iwl_scan_cancel_timeout(priv, 100))
3683                         IWL_WARN(priv, "Could not cancel scan.\n");
3684                 else {
3685                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3686                                        flags);
3687                         priv->staging_rxon.flags = cpu_to_le32(flags);
3688                         iwlcore_commit_rxon(priv);
3689                 }
3690         }
3691         mutex_unlock(&priv->mutex);
3692
3693         return count;
3694 }
3695
3696 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3697
3698 static ssize_t show_filter_flags(struct device *d,
3699                                  struct device_attribute *attr, char *buf)
3700 {
3701         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3702
3703         return sprintf(buf, "0x%04X\n",
3704                 le32_to_cpu(priv->active_rxon.filter_flags));
3705 }
3706
3707 static ssize_t store_filter_flags(struct device *d,
3708                                   struct device_attribute *attr,
3709                                   const char *buf, size_t count)
3710 {
3711         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3712         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3713
3714         mutex_lock(&priv->mutex);
3715         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3716                 /* Cancel any currently running scans... */
3717                 if (iwl_scan_cancel_timeout(priv, 100))
3718                         IWL_WARN(priv, "Could not cancel scan.\n");
3719                 else {
3720                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3721                                        "0x%04X\n", filter_flags);
3722                         priv->staging_rxon.filter_flags =
3723                                 cpu_to_le32(filter_flags);
3724                         iwlcore_commit_rxon(priv);
3725                 }
3726         }
3727         mutex_unlock(&priv->mutex);
3728
3729         return count;
3730 }
3731
3732 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3733                    store_filter_flags);
3734
3735 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3736
3737 static ssize_t show_measurement(struct device *d,
3738                                 struct device_attribute *attr, char *buf)
3739 {
3740         struct iwl_priv *priv = dev_get_drvdata(d);
3741         struct iwl_spectrum_notification measure_report;
3742         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3743         u8 *data = (u8 *)&measure_report;
3744         unsigned long flags;
3745
3746         spin_lock_irqsave(&priv->lock, flags);
3747         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3748                 spin_unlock_irqrestore(&priv->lock, flags);
3749                 return 0;
3750         }
3751         memcpy(&measure_report, &priv->measure_report, size);
3752         priv->measurement_status = 0;
3753         spin_unlock_irqrestore(&priv->lock, flags);
3754
3755         while (size && (PAGE_SIZE - len)) {
3756                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3757                                    PAGE_SIZE - len, 1);
3758                 len = strlen(buf);
3759                 if (PAGE_SIZE - len)
3760                         buf[len++] = '\n';
3761
3762                 ofs += 16;
3763                 size -= min(size, 16U);
3764         }
3765
3766         return len;
3767 }
3768
3769 static ssize_t store_measurement(struct device *d,
3770                                  struct device_attribute *attr,
3771                                  const char *buf, size_t count)
3772 {
3773         struct iwl_priv *priv = dev_get_drvdata(d);
3774         struct ieee80211_measurement_params params = {
3775                 .channel = le16_to_cpu(priv->active_rxon.channel),
3776                 .start_time = cpu_to_le64(priv->last_tsf),
3777                 .duration = cpu_to_le16(1),
3778         };
3779         u8 type = IWL_MEASURE_BASIC;
3780         u8 buffer[32];
3781         u8 channel;
3782
3783         if (count) {
3784                 char *p = buffer;
3785                 strncpy(buffer, buf, min(sizeof(buffer), count));
3786                 channel = simple_strtoul(p, NULL, 0);
3787                 if (channel)
3788                         params.channel = channel;
3789
3790                 p = buffer;
3791                 while (*p && *p != ' ')
3792                         p++;
3793                 if (*p)
3794                         type = simple_strtoul(p + 1, NULL, 0);
3795         }
3796
3797         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3798                        "channel %d (for '%s')\n", type, params.channel, buf);
3799         iwl3945_get_measurement(priv, &params, type);
3800
3801         return count;
3802 }
3803
3804 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3805                    show_measurement, store_measurement);
3806 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3807
3808 static ssize_t store_retry_rate(struct device *d,
3809                                 struct device_attribute *attr,
3810                                 const char *buf, size_t count)
3811 {
3812         struct iwl_priv *priv = dev_get_drvdata(d);
3813
3814         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3815         if (priv->retry_rate <= 0)
3816                 priv->retry_rate = 1;
3817
3818         return count;
3819 }
3820
3821 static ssize_t show_retry_rate(struct device *d,
3822                                struct device_attribute *attr, char *buf)
3823 {
3824         struct iwl_priv *priv = dev_get_drvdata(d);
3825         return sprintf(buf, "%d", priv->retry_rate);
3826 }
3827
3828 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3829                    store_retry_rate);
3830
3831
3832 static ssize_t store_power_level(struct device *d,
3833                                  struct device_attribute *attr,
3834                                  const char *buf, size_t count)
3835 {
3836         struct iwl_priv *priv = dev_get_drvdata(d);
3837         int ret;
3838         unsigned long mode;
3839
3840
3841         mutex_lock(&priv->mutex);
3842
3843         ret = strict_strtoul(buf, 10, &mode);
3844         if (ret)
3845                 goto out;
3846
3847         ret = iwl_power_set_user_mode(priv, mode);
3848         if (ret) {
3849                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3850                 goto out;
3851         }
3852         ret = count;
3853
3854  out:
3855         mutex_unlock(&priv->mutex);
3856         return ret;
3857 }
3858
3859 static ssize_t show_power_level(struct device *d,
3860                                 struct device_attribute *attr, char *buf)
3861 {
3862         struct iwl_priv *priv = dev_get_drvdata(d);
3863         int mode = priv->power_data.user_power_setting;
3864         int system = priv->power_data.system_power_setting;
3865         int level = priv->power_data.power_mode;
3866         char *p = buf;
3867
3868         switch (system) {
3869         case IWL_POWER_SYS_AUTO:
3870                 p += sprintf(p, "SYSTEM:auto");
3871                 break;
3872         case IWL_POWER_SYS_AC:
3873                 p += sprintf(p, "SYSTEM:ac");
3874                 break;
3875         case IWL_POWER_SYS_BATTERY:
3876                 p += sprintf(p, "SYSTEM:battery");
3877                 break;
3878         }
3879
3880         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3881                         "fixed" : "auto");
3882         p += sprintf(p, "\tINDEX:%d", level);
3883         p += sprintf(p, "\n");
3884         return p - buf + 1;
3885 }
3886
3887 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR,
3888                    show_power_level, store_power_level);
3889
3890 #define MAX_WX_STRING 80
3891
3892 /* Values are in microsecond */
3893 static const s32 timeout_duration[] = {
3894         350000,
3895         250000,
3896         75000,
3897         37000,
3898         25000,
3899 };
3900 static const s32 period_duration[] = {
3901         400000,
3902         700000,
3903         1000000,
3904         1000000,
3905         1000000
3906 };
3907
3908 static ssize_t show_channels(struct device *d,
3909                              struct device_attribute *attr, char *buf)
3910 {
3911         /* all this shit doesn't belong into sysfs anyway */
3912         return 0;
3913 }
3914
3915 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3916
3917 static ssize_t show_statistics(struct device *d,
3918                                struct device_attribute *attr, char *buf)
3919 {
3920         struct iwl_priv *priv = dev_get_drvdata(d);
3921         u32 size = sizeof(struct iwl3945_notif_statistics);
3922         u32 len = 0, ofs = 0;
3923         u8 *data = (u8 *)&priv->statistics_39;
3924         int rc = 0;
3925
3926         if (!iwl_is_alive(priv))
3927                 return -EAGAIN;
3928
3929         mutex_lock(&priv->mutex);
3930         rc = iwl_send_statistics_request(priv, 0);
3931         mutex_unlock(&priv->mutex);
3932
3933         if (rc) {
3934                 len = sprintf(buf,
3935                               "Error sending statistics request: 0x%08X\n", rc);
3936                 return len;
3937         }
3938
3939         while (size && (PAGE_SIZE - len)) {
3940                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3941                                    PAGE_SIZE - len, 1);
3942                 len = strlen(buf);
3943                 if (PAGE_SIZE - len)
3944                         buf[len++] = '\n';
3945
3946                 ofs += 16;
3947                 size -= min(size, 16U);
3948         }
3949
3950         return len;
3951 }
3952
3953 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3954
3955 static ssize_t show_antenna(struct device *d,
3956                             struct device_attribute *attr, char *buf)
3957 {
3958         struct iwl_priv *priv = dev_get_drvdata(d);
3959
3960         if (!iwl_is_alive(priv))
3961                 return -EAGAIN;
3962
3963         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3964 }
3965
3966 static ssize_t store_antenna(struct device *d,
3967                              struct device_attribute *attr,
3968                              const char *buf, size_t count)
3969 {
3970         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3971         int ant;
3972
3973         if (count == 0)
3974                 return 0;
3975
3976         if (sscanf(buf, "%1i", &ant) != 1) {
3977                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3978                 return count;
3979         }
3980
3981         if ((ant >= 0) && (ant <= 2)) {
3982                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3983                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3984         } else
3985                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3986
3987
3988         return count;
3989 }
3990
3991 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3992
3993 static ssize_t show_status(struct device *d,
3994                            struct device_attribute *attr, char *buf)
3995 {
3996         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3997         if (!iwl_is_alive(priv))
3998                 return -EAGAIN;
3999         return sprintf(buf, "0x%08x\n", (int)priv->status);
4000 }
4001
4002 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
4003
4004 static ssize_t dump_error_log(struct device *d,
4005                               struct device_attribute *attr,
4006                               const char *buf, size_t count)
4007 {
4008         char *p = (char *)buf;
4009
4010         if (p[0] == '1')
4011                 iwl3945_dump_nic_error_log((struct iwl_priv *)d->driver_data);
4012
4013         return strnlen(buf, count);
4014 }
4015
4016 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
4017
4018 static ssize_t dump_event_log(struct device *d,
4019                               struct device_attribute *attr,
4020                               const char *buf, size_t count)
4021 {
4022         char *p = (char *)buf;
4023
4024         if (p[0] == '1')
4025                 iwl3945_dump_nic_event_log((struct iwl_priv *)d->driver_data);
4026
4027         return strnlen(buf, count);
4028 }
4029
4030 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
4031
4032 /*****************************************************************************
4033  *
4034  * driver setup and tear down
4035  *
4036  *****************************************************************************/
4037
4038 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
4039 {
4040         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
4041
4042         init_waitqueue_head(&priv->wait_command_queue);
4043
4044         INIT_WORK(&priv->up, iwl3945_bg_up);
4045         INIT_WORK(&priv->restart, iwl3945_bg_restart);
4046         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
4047         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
4048         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
4049         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
4050         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
4051         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
4052         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
4053         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
4054         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
4055         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
4056
4057         iwl3945_hw_setup_deferred_work(priv);
4058
4059         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
4060                      iwl3945_irq_tasklet, (unsigned long)priv);
4061 }
4062
4063 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
4064 {
4065         iwl3945_hw_cancel_deferred_work(priv);
4066
4067         cancel_delayed_work_sync(&priv->init_alive_start);
4068         cancel_delayed_work(&priv->scan_check);
4069         cancel_delayed_work(&priv->alive_start);
4070         cancel_work_sync(&priv->beacon_update);
4071 }
4072
4073 static struct attribute *iwl3945_sysfs_entries[] = {
4074         &dev_attr_antenna.attr,
4075         &dev_attr_channels.attr,
4076         &dev_attr_dump_errors.attr,
4077         &dev_attr_dump_events.attr,
4078         &dev_attr_flags.attr,
4079         &dev_attr_filter_flags.attr,
4080 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
4081         &dev_attr_measurement.attr,
4082 #endif
4083         &dev_attr_power_level.attr,
4084         &dev_attr_retry_rate.attr,
4085         &dev_attr_statistics.attr,
4086         &dev_attr_status.attr,
4087         &dev_attr_temperature.attr,
4088         &dev_attr_tx_power.attr,
4089 #ifdef CONFIG_IWLWIFI_DEBUG
4090         &dev_attr_debug_level.attr,
4091 #endif
4092         NULL
4093 };
4094
4095 static struct attribute_group iwl3945_attribute_group = {
4096         .name = NULL,           /* put in device directory */
4097         .attrs = iwl3945_sysfs_entries,
4098 };
4099
4100 static struct ieee80211_ops iwl3945_hw_ops = {
4101         .tx = iwl3945_mac_tx,
4102         .start = iwl3945_mac_start,
4103         .stop = iwl3945_mac_stop,
4104         .add_interface = iwl_mac_add_interface,
4105         .remove_interface = iwl_mac_remove_interface,
4106         .config = iwl_mac_config,
4107         .config_interface = iwl_mac_config_interface,
4108         .configure_filter = iwl_configure_filter,
4109         .set_key = iwl3945_mac_set_key,
4110         .get_tx_stats = iwl_mac_get_tx_stats,
4111         .conf_tx = iwl_mac_conf_tx,
4112         .reset_tsf = iwl_mac_reset_tsf,
4113         .bss_info_changed = iwl_bss_info_changed,
4114         .hw_scan = iwl_mac_hw_scan
4115 };
4116
4117 static int iwl3945_init_drv(struct iwl_priv *priv)
4118 {
4119         int ret;
4120         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4121
4122         priv->retry_rate = 1;
4123         priv->ibss_beacon = NULL;
4124
4125         spin_lock_init(&priv->lock);
4126         spin_lock_init(&priv->power_data.lock);
4127         spin_lock_init(&priv->sta_lock);
4128         spin_lock_init(&priv->hcmd_lock);
4129
4130         INIT_LIST_HEAD(&priv->free_frames);
4131
4132         mutex_init(&priv->mutex);
4133
4134         /* Clear the driver's (not device's) station table */
4135         priv->cfg->ops->smgmt->clear_station_table(priv);
4136
4137         priv->data_retry_limit = -1;
4138         priv->ieee_channels = NULL;
4139         priv->ieee_rates = NULL;
4140         priv->band = IEEE80211_BAND_2GHZ;
4141
4142         priv->iw_mode = NL80211_IFTYPE_STATION;
4143
4144         iwl_reset_qos(priv);
4145
4146         priv->qos_data.qos_active = 0;
4147         priv->qos_data.qos_cap.val = 0;
4148
4149         priv->rates_mask = IWL_RATES_MASK;
4150         /* If power management is turned on, default to CAM mode */
4151         priv->power_mode = IWL_POWER_MODE_CAM;
4152         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
4153
4154         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
4155                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
4156                          eeprom->version);
4157                 ret = -EINVAL;
4158                 goto err;
4159         }
4160         ret = iwl_init_channel_map(priv);
4161         if (ret) {
4162                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
4163                 goto err;
4164         }
4165
4166         /* Set up txpower settings in driver for all channels */
4167         if (iwl3945_txpower_set_from_eeprom(priv)) {
4168                 ret = -EIO;
4169                 goto err_free_channel_map;
4170         }
4171
4172         ret = iwlcore_init_geos(priv);
4173         if (ret) {
4174                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
4175                 goto err_free_channel_map;
4176         }
4177         iwl3945_init_hw_rates(priv, priv->ieee_rates);
4178
4179         return 0;
4180
4181 err_free_channel_map:
4182         iwl_free_channel_map(priv);
4183 err:
4184         return ret;
4185 }
4186
4187 static int iwl3945_setup_mac(struct iwl_priv *priv)
4188 {
4189         int ret;
4190         struct ieee80211_hw *hw = priv->hw;
4191
4192         hw->rate_control_algorithm = "iwl-3945-rs";
4193         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
4194
4195         /* Tell mac80211 our characteristics */
4196         hw->flags = IEEE80211_HW_SIGNAL_DBM |
4197                     IEEE80211_HW_NOISE_DBM |
4198                     IEEE80211_HW_SPECTRUM_MGMT;
4199
4200         hw->wiphy->interface_modes =
4201                 BIT(NL80211_IFTYPE_STATION) |
4202                 BIT(NL80211_IFTYPE_ADHOC);
4203
4204         hw->wiphy->custom_regulatory = true;
4205
4206         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
4207         /* we create the 802.11 header and a zero-length SSID element */
4208         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
4209
4210         /* Default value; 4 EDCA QOS priorities */
4211         hw->queues = 4;
4212
4213         hw->conf.beacon_int = 100;
4214
4215         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
4216                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
4217                         &priv->bands[IEEE80211_BAND_2GHZ];
4218
4219         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
4220                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
4221                         &priv->bands[IEEE80211_BAND_5GHZ];
4222
4223         ret = ieee80211_register_hw(priv->hw);
4224         if (ret) {
4225                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
4226                 return ret;
4227         }
4228         priv->mac80211_registered = 1;
4229
4230         return 0;
4231 }
4232
4233 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4234 {
4235         int err = 0;
4236         struct iwl_priv *priv;
4237         struct ieee80211_hw *hw;
4238         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
4239         struct iwl3945_eeprom *eeprom;
4240         unsigned long flags;
4241
4242         /***********************
4243          * 1. Allocating HW data
4244          * ********************/
4245
4246         /* mac80211 allocates memory for this device instance, including
4247          *   space for this driver's private structure */
4248         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
4249         if (hw == NULL) {
4250                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
4251                 err = -ENOMEM;
4252                 goto out;
4253         }
4254         priv = hw->priv;
4255         SET_IEEE80211_DEV(hw, &pdev->dev);
4256
4257         if ((iwl3945_mod_params.num_of_queues > IWL39_MAX_NUM_QUEUES) ||
4258              (iwl3945_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
4259                 IWL_ERR(priv,
4260                         "invalid queues_num, should be between %d and %d\n",
4261                         IWL_MIN_NUM_QUEUES, IWL39_MAX_NUM_QUEUES);
4262                 err = -EINVAL;
4263                 goto out_ieee80211_free_hw;
4264         }
4265
4266         /*
4267          * Disabling hardware scan means that mac80211 will perform scans
4268          * "the hard way", rather than using device's scan.
4269          */
4270         if (iwl3945_mod_params.disable_hw_scan) {
4271                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4272                 iwl3945_hw_ops.hw_scan = NULL;
4273         }
4274
4275
4276         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4277         priv->cfg = cfg;
4278         priv->pci_dev = pdev;
4279
4280 #ifdef CONFIG_IWLWIFI_DEBUG
4281         priv->debug_level = iwl3945_mod_params.debug;
4282         atomic_set(&priv->restrict_refcnt, 0);
4283 #endif
4284
4285         /***************************
4286          * 2. Initializing PCI bus
4287          * *************************/
4288         if (pci_enable_device(pdev)) {
4289                 err = -ENODEV;
4290                 goto out_ieee80211_free_hw;
4291         }
4292
4293         pci_set_master(pdev);
4294
4295         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4296         if (!err)
4297                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4298         if (err) {
4299                 IWL_WARN(priv, "No suitable DMA available.\n");
4300                 goto out_pci_disable_device;
4301         }
4302
4303         pci_set_drvdata(pdev, priv);
4304         err = pci_request_regions(pdev, DRV_NAME);
4305         if (err)
4306                 goto out_pci_disable_device;
4307
4308         /***********************
4309          * 3. Read REV Register
4310          * ********************/
4311         priv->hw_base = pci_iomap(pdev, 0, 0);
4312         if (!priv->hw_base) {
4313                 err = -ENODEV;
4314                 goto out_pci_release_regions;
4315         }
4316
4317         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4318                         (unsigned long long) pci_resource_len(pdev, 0));
4319         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4320
4321         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4322          * PCI Tx retries from interfering with C3 CPU state */
4323         pci_write_config_byte(pdev, 0x41, 0x00);
4324
4325         /* amp init */
4326         err = priv->cfg->ops->lib->apm_ops.init(priv);
4327         if (err < 0) {
4328                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
4329                 goto out_iounmap;
4330         }
4331
4332         /***********************
4333          * 4. Read EEPROM
4334          * ********************/
4335
4336         /* Read the EEPROM */
4337         err = iwl_eeprom_init(priv);
4338         if (err) {
4339                 IWL_ERR(priv, "Unable to init EEPROM\n");
4340                 goto out_iounmap;
4341         }
4342         /* MAC Address location in EEPROM same for 3945/4965 */
4343         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4344         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4345         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4346         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4347
4348         /***********************
4349          * 5. Setup HW Constants
4350          * ********************/
4351         /* Device-specific setup */
4352         if (iwl3945_hw_set_hw_params(priv)) {
4353                 IWL_ERR(priv, "failed to set hw settings\n");
4354                 goto out_eeprom_free;
4355         }
4356
4357         /***********************
4358          * 6. Setup priv
4359          * ********************/
4360
4361         err = iwl3945_init_drv(priv);
4362         if (err) {
4363                 IWL_ERR(priv, "initializing driver failed\n");
4364                 goto out_unset_hw_params;
4365         }
4366
4367         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4368                 priv->cfg->name);
4369
4370         /***********************
4371          * 7. Setup Services
4372          * ********************/
4373
4374         spin_lock_irqsave(&priv->lock, flags);
4375         iwl_disable_interrupts(priv);
4376         spin_unlock_irqrestore(&priv->lock, flags);
4377
4378         pci_enable_msi(priv->pci_dev);
4379
4380         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
4381                           DRV_NAME, priv);
4382         if (err) {
4383                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4384                 goto out_disable_msi;
4385         }
4386
4387         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4388         if (err) {
4389                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4390                 goto out_release_irq;
4391         }
4392
4393         iwl_set_rxon_channel(priv,
4394                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4395         iwl3945_setup_deferred_work(priv);
4396         iwl3945_setup_rx_handlers(priv);
4397
4398         /*********************************
4399          * 8. Setup and Register mac80211
4400          * *******************************/
4401
4402         iwl_enable_interrupts(priv);
4403
4404         err = iwl3945_setup_mac(priv);
4405         if (err)
4406                 goto  out_remove_sysfs;
4407
4408         err = iwl_dbgfs_register(priv, DRV_NAME);
4409         if (err)
4410                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4411
4412         err = iwl_rfkill_init(priv);
4413         if (err)
4414                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
4415                                   "Ignoring error: %d\n", err);
4416         else
4417                 iwl_rfkill_set_hw_state(priv);
4418
4419         /* Start monitoring the killswitch */
4420         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4421                            2 * HZ);
4422
4423         return 0;
4424
4425  out_remove_sysfs:
4426         destroy_workqueue(priv->workqueue);
4427         priv->workqueue = NULL;
4428         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4429  out_release_irq:
4430         free_irq(priv->pci_dev->irq, priv);
4431  out_disable_msi:
4432         pci_disable_msi(priv->pci_dev);
4433         iwlcore_free_geos(priv);
4434         iwl_free_channel_map(priv);
4435  out_unset_hw_params:
4436         iwl3945_unset_hw_params(priv);
4437  out_eeprom_free:
4438         iwl_eeprom_free(priv);
4439  out_iounmap:
4440         pci_iounmap(pdev, priv->hw_base);
4441  out_pci_release_regions:
4442         pci_release_regions(pdev);
4443  out_pci_disable_device:
4444         pci_set_drvdata(pdev, NULL);
4445         pci_disable_device(pdev);
4446  out_ieee80211_free_hw:
4447         ieee80211_free_hw(priv->hw);
4448  out:
4449         return err;
4450 }
4451
4452 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4453 {
4454         struct iwl_priv *priv = pci_get_drvdata(pdev);
4455         unsigned long flags;
4456
4457         if (!priv)
4458                 return;
4459
4460         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4461
4462         iwl_dbgfs_unregister(priv);
4463
4464         set_bit(STATUS_EXIT_PENDING, &priv->status);
4465
4466         if (priv->mac80211_registered) {
4467                 ieee80211_unregister_hw(priv->hw);
4468                 priv->mac80211_registered = 0;
4469         } else {
4470                 iwl3945_down(priv);
4471         }
4472
4473         /* make sure we flush any pending irq or
4474          * tasklet for the driver
4475          */
4476         spin_lock_irqsave(&priv->lock, flags);
4477         iwl_disable_interrupts(priv);
4478         spin_unlock_irqrestore(&priv->lock, flags);
4479
4480         iwl_synchronize_irq(priv);
4481
4482         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4483
4484         iwl_rfkill_unregister(priv);
4485         cancel_delayed_work_sync(&priv->rfkill_poll);
4486
4487         iwl3945_dealloc_ucode_pci(priv);
4488
4489         if (priv->rxq.bd)
4490                 iwl3945_rx_queue_free(priv, &priv->rxq);
4491         iwl3945_hw_txq_ctx_free(priv);
4492
4493         iwl3945_unset_hw_params(priv);
4494         priv->cfg->ops->smgmt->clear_station_table(priv);
4495
4496         /*netif_stop_queue(dev); */
4497         flush_workqueue(priv->workqueue);
4498
4499         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4500          * priv->workqueue... so we can't take down the workqueue
4501          * until now... */
4502         destroy_workqueue(priv->workqueue);
4503         priv->workqueue = NULL;
4504
4505         free_irq(pdev->irq, priv);
4506         pci_disable_msi(pdev);
4507
4508         pci_iounmap(pdev, priv->hw_base);
4509         pci_release_regions(pdev);
4510         pci_disable_device(pdev);
4511         pci_set_drvdata(pdev, NULL);
4512
4513         iwl_free_channel_map(priv);
4514         iwlcore_free_geos(priv);
4515         kfree(priv->scan);
4516         if (priv->ibss_beacon)
4517                 dev_kfree_skb(priv->ibss_beacon);
4518
4519         ieee80211_free_hw(priv->hw);
4520 }
4521
4522
4523 /*****************************************************************************
4524  *
4525  * driver and module entry point
4526  *
4527  *****************************************************************************/
4528
4529 static struct pci_driver iwl3945_driver = {
4530         .name = DRV_NAME,
4531         .id_table = iwl3945_hw_card_ids,
4532         .probe = iwl3945_pci_probe,
4533         .remove = __devexit_p(iwl3945_pci_remove),
4534 #ifdef CONFIG_PM
4535         .suspend = iwl_pci_suspend,
4536         .resume = iwl_pci_resume,
4537 #endif
4538 };
4539
4540 static int __init iwl3945_init(void)
4541 {
4542
4543         int ret;
4544         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4545         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4546
4547         ret = iwl3945_rate_control_register();
4548         if (ret) {
4549                 printk(KERN_ERR DRV_NAME
4550                        "Unable to register rate control algorithm: %d\n", ret);
4551                 return ret;
4552         }
4553
4554         ret = pci_register_driver(&iwl3945_driver);
4555         if (ret) {
4556                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4557                 goto error_register;
4558         }
4559
4560         return ret;
4561
4562 error_register:
4563         iwl3945_rate_control_unregister();
4564         return ret;
4565 }
4566
4567 static void __exit iwl3945_exit(void)
4568 {
4569         pci_unregister_driver(&iwl3945_driver);
4570         iwl3945_rate_control_unregister();
4571 }
4572
4573 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4574
4575 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4576 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4577 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4578 MODULE_PARM_DESC(swcrypto,
4579                  "using software crypto (default 1 [software])\n");
4580 module_param_named(debug, iwl3945_mod_params.debug, uint, 0444);
4581 MODULE_PARM_DESC(debug, "debug output mask");
4582 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4583 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4584
4585 module_param_named(queues_num, iwl3945_mod_params.num_of_queues, int, 0444);
4586 MODULE_PARM_DESC(queues_num, "number of hw queues.");
4587
4588 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4589 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4590
4591 module_exit(iwl3945_exit);
4592 module_init(iwl3945_init);