SAFE public projects git trees. - safe/jmp/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/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #define DRV_NAME        "iwl3945"
  49
  50 #include "iwl-fh.h"
  51 #include "iwl-3945-fh.h"
  52 #include "iwl-commands.h"
  53 #include "iwl-sta.h"
  54 #include "iwl-3945.h"
  55 #include "iwl-helpers.h"
  56 #include "iwl-core.h"
  57 #include "iwl-dev.h"
  58
  59 /*
  60  * module name, copyright, version, etc.
  61  */
  62
  63 #define DRV_DESCRIPTION \
  64 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  65
  66 #ifdef CONFIG_IWLWIFI_DEBUG
  67 #define VD "d"
  68 #else
  69 #define VD
  70 #endif
  71
  72 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  73 #define VS "s"
  74 #else
  75 #define VS
  76 #endif
  77
  78 #define IWL39_VERSION "1.2.26k" VD VS
  79 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  80 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  81 #define DRV_VERSION     IWL39_VERSION
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88
  89  /* module parameters */
  90 struct iwl_mod_params iwl3945_mod_params = {
  91         .num_of_queues = IWL39_NUM_QUEUES, /* Not used */
  92         .sw_crypto = 1,
  93         .restart_fw = 1,
  94         /* the rest are 0 by default */
  95 };
  96
  97 /**
  98  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  99  * @priv: eeprom and antenna fields are used to determine antenna flags
 100  *
 101  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 102  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 103  *
 104  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 105  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 106  * IWL_ANTENNA_AUX       - Force AUX antenna
 107  */
 108 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 109 {
 110         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 111
 112         switch (iwl3945_mod_params.antenna) {
 113         case IWL_ANTENNA_DIVERSITY:
 114                 return 0;
 115
 116         case IWL_ANTENNA_MAIN:
 117                 if (eeprom->antenna_switch_type)
 118                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 119                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 120
 121         case IWL_ANTENNA_AUX:
 122                 if (eeprom->antenna_switch_type)
 123                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 124                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 125         }
 126
 127         /* bad antenna selector value */
 128         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 129                 iwl3945_mod_params.antenna);
 130
 131         return 0;               /* "diversity" is default if error */
 132 }
 133
 134 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 135                                    struct ieee80211_key_conf *keyconf,
 136                                    u8 sta_id)
 137 {
 138         unsigned long flags;
 139         __le16 key_flags = 0;
 140         int ret;
 141
 142         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 143         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 144
 145         if (sta_id == priv->hw_params.bcast_sta_id)
 146                 key_flags |= STA_KEY_MULTICAST_MSK;
 147
 148         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 149         keyconf->hw_key_idx = keyconf->keyidx;
 150         key_flags &= ~STA_KEY_FLG_INVALID;
 151
 152         spin_lock_irqsave(&priv->sta_lock, flags);
 153         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 154         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 155         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 156                keyconf->keylen);
 157
 158         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 159                keyconf->keylen);
 160
 161         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 162                         == STA_KEY_FLG_NO_ENC)
 163                 priv->stations[sta_id].sta.key.key_offset =
 164                                  iwl_get_free_ucode_key_index(priv);
 165         /* else, we are overriding an existing key => no need to allocated room
 166         * in uCode. */
 167
 168         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 169                 "no space for a new key");
 170
 171         priv->stations[sta_id].sta.key.key_flags = key_flags;
 172         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 173         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 174
 175         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 176
 177         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 178
 179         spin_unlock_irqrestore(&priv->sta_lock, flags);
 180
 181         return ret;
 182 }
 183
 184 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 185                                   struct ieee80211_key_conf *keyconf,
 186                                   u8 sta_id)
 187 {
 188         return -EOPNOTSUPP;
 189 }
 190
 191 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 192                                   struct ieee80211_key_conf *keyconf,
 193                                   u8 sta_id)
 194 {
 195         return -EOPNOTSUPP;
 196 }
 197
 198 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 199 {
 200         unsigned long flags;
 201
 202         spin_lock_irqsave(&priv->sta_lock, flags);
 203         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 204         memset(&priv->stations[sta_id].sta.key, 0,
 205                 sizeof(struct iwl4965_keyinfo));
 206         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 207         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 208         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 209         spin_unlock_irqrestore(&priv->sta_lock, flags);
 210
 211         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 212         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 213         return 0;
 214 }
 215
 216 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 217                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 218 {
 219         int ret = 0;
 220
 221         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 222
 223         switch (keyconf->alg) {
 224         case ALG_CCMP:
 225                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 226                 break;
 227         case ALG_TKIP:
 228                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 229                 break;
 230         case ALG_WEP:
 231                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 232                 break;
 233         default:
 234                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 235                 ret = -EINVAL;
 236         }
 237
 238         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 239                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 240                       sta_id, ret);
 241
 242         return ret;
 243 }
 244
 245 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 246 {
 247         int ret = -EOPNOTSUPP;
 248
 249         return ret;
 250 }
 251
 252 static int iwl3945_set_static_key(struct iwl_priv *priv,
 253                                 struct ieee80211_key_conf *key)
 254 {
 255         if (key->alg == ALG_WEP)
 256                 return -EOPNOTSUPP;
 257
 258         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 259         return -EINVAL;
 260 }
 261
 262 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 263 {
 264         struct list_head *element;
 265
 266         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 267                        priv->frames_count);
 268
 269         while (!list_empty(&priv->free_frames)) {
 270                 element = priv->free_frames.next;
 271                 list_del(element);
 272                 kfree(list_entry(element, struct iwl3945_frame, list));
 273                 priv->frames_count--;
 274         }
 275
 276         if (priv->frames_count) {
 277                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 278                             priv->frames_count);
 279                 priv->frames_count = 0;
 280         }
 281 }
 282
 283 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 284 {
 285         struct iwl3945_frame *frame;
 286         struct list_head *element;
 287         if (list_empty(&priv->free_frames)) {
 288                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 289                 if (!frame) {
 290                         IWL_ERR(priv, "Could not allocate frame!\n");
 291                         return NULL;
 292                 }
 293
 294                 priv->frames_count++;
 295                 return frame;
 296         }
 297
 298         element = priv->free_frames.next;
 299         list_del(element);
 300         return list_entry(element, struct iwl3945_frame, list);
 301 }
 302
 303 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 304 {
 305         memset(frame, 0, sizeof(*frame));
 306         list_add(&frame->list, &priv->free_frames);
 307 }
 308
 309 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 310                                 struct ieee80211_hdr *hdr,
 311                                 int left)
 312 {
 313
 314         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 315             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 316              (priv->iw_mode != NL80211_IFTYPE_AP)))
 317                 return 0;
 318
 319         if (priv->ibss_beacon->len > left)
 320                 return 0;
 321
 322         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 323
 324         return priv->ibss_beacon->len;
 325 }
 326
 327 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 328 {
 329         struct iwl3945_frame *frame;
 330         unsigned int frame_size;
 331         int rc;
 332         u8 rate;
 333
 334         frame = iwl3945_get_free_frame(priv);
 335
 336         if (!frame) {
 337                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 338                           "command.\n");
 339                 return -ENOMEM;
 340         }
 341
 342         rate = iwl_rate_get_lowest_plcp(priv);
 343
 344         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 345
 346         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 347                               &frame->u.cmd[0]);
 348
 349         iwl3945_free_frame(priv, frame);
 350
 351         return rc;
 352 }
 353
 354 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 355 {
 356         if (priv->shared_virt)
 357                 pci_free_consistent(priv->pci_dev,
 358                                     sizeof(struct iwl3945_shared),
 359                                     priv->shared_virt,
 360                                     priv->shared_phys);
 361 }
 362
 363 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 364                                       struct ieee80211_tx_info *info,
 365                                       struct iwl_device_cmd *cmd,
 366                                       struct sk_buff *skb_frag,
 367                                       int sta_id)
 368 {
 369         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 370         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 371
 372         switch (keyinfo->alg) {
 373         case ALG_CCMP:
 374                 tx->sec_ctl = TX_CMD_SEC_CCM;
 375                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 376                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 377                 break;
 378
 379         case ALG_TKIP:
 380                 break;
 381
 382         case ALG_WEP:
 383                 tx->sec_ctl = TX_CMD_SEC_WEP |
 384                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 385
 386                 if (keyinfo->keylen == 13)
 387                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 388
 389                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 390
 391                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 392                              "with key %d\n", info->control.hw_key->hw_key_idx);
 393                 break;
 394
 395         default:
 396                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 397                 break;
 398         }
 399 }
 400
 401 /*
 402  * handle build REPLY_TX command notification.
 403  */
 404 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 405                                   struct iwl_device_cmd *cmd,
 406                                   struct ieee80211_tx_info *info,
 407                                   struct ieee80211_hdr *hdr, u8 std_id)
 408 {
 409         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 410         __le32 tx_flags = tx->tx_flags;
 411         __le16 fc = hdr->frame_control;
 412         u8 rc_flags = info->control.rates[0].flags;
 413
 414         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 415         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 416                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 417                 if (ieee80211_is_mgmt(fc))
 418                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 419                 if (ieee80211_is_probe_resp(fc) &&
 420                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 421                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 422         } else {
 423                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 424                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 425         }
 426
 427         tx->sta_id = std_id;
 428         if (ieee80211_has_morefrags(fc))
 429                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 430
 431         if (ieee80211_is_data_qos(fc)) {
 432                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 433                 tx->tid_tspec = qc[0] & 0xf;
 434                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 435         } else {
 436                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 437         }
 438
 439         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 440                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 441                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 442         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 443                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 444                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 445         }
 446
 447         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 448                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 449
 450         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 451         if (ieee80211_is_mgmt(fc)) {
 452                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 453                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 454                 else
 455                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 456         } else {
 457                 tx->timeout.pm_frame_timeout = 0;
 458         }
 459
 460         tx->driver_txop = 0;
 461         tx->tx_flags = tx_flags;
 462         tx->next_frame_len = 0;
 463 }
 464
 465 /*
 466  * start REPLY_TX command process
 467  */
 468 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 469 {
 470         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 471         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 472         struct iwl3945_tx_cmd *tx;
 473         struct iwl_tx_queue *txq = NULL;
 474         struct iwl_queue *q = NULL;
 475         struct iwl_device_cmd *out_cmd;
 476         struct iwl_cmd_meta *out_meta;
 477         dma_addr_t phys_addr;
 478         dma_addr_t txcmd_phys;
 479         int txq_id = skb_get_queue_mapping(skb);
 480         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 481         u8 id;
 482         u8 unicast;
 483         u8 sta_id;
 484         u8 tid = 0;
 485         u16 seq_number = 0;
 486         __le16 fc;
 487         u8 wait_write_ptr = 0;
 488         u8 *qc = NULL;
 489         unsigned long flags;
 490         int rc;
 491
 492         spin_lock_irqsave(&priv->lock, flags);
 493         if (iwl_is_rfkill(priv)) {
 494                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 495                 goto drop_unlock;
 496         }
 497
 498         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 499                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 500                 goto drop_unlock;
 501         }
 502
 503         unicast = !is_multicast_ether_addr(hdr->addr1);
 504         id = 0;
 505
 506         fc = hdr->frame_control;
 507
 508 #ifdef CONFIG_IWLWIFI_DEBUG
 509         if (ieee80211_is_auth(fc))
 510                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 511         else if (ieee80211_is_assoc_req(fc))
 512                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 513         else if (ieee80211_is_reassoc_req(fc))
 514                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 515 #endif
 516
 517         /* drop all non-injected data frame if we are not associated */
 518         if (ieee80211_is_data(fc) &&
 519             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
 520             (!iwl_is_associated(priv) ||
 521              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 522                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 523                 goto drop_unlock;
 524         }
 525
 526         spin_unlock_irqrestore(&priv->lock, flags);
 527
 528         hdr_len = ieee80211_hdrlen(fc);
 529
 530         /* Find (or create) index into station table for destination station */
 531         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 532                 sta_id = priv->hw_params.bcast_sta_id;
 533         else
 534                 sta_id = iwl_get_sta_id(priv, hdr);
 535         if (sta_id == IWL_INVALID_STATION) {
 536                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 537                                hdr->addr1);
 538                 goto drop;
 539         }
 540
 541         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 542
 543         if (ieee80211_is_data_qos(fc)) {
 544                 qc = ieee80211_get_qos_ctl(hdr);
 545                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 546                 if (unlikely(tid >= MAX_TID_COUNT))
 547                         goto drop;
 548                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 549                                 IEEE80211_SCTL_SEQ;
 550                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 551                         (hdr->seq_ctrl &
 552                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 553                 seq_number += 0x10;
 554         }
 555
 556         /* Descriptor for chosen Tx queue */
 557         txq = &priv->txq[txq_id];
 558         q = &txq->q;
 559
 560         spin_lock_irqsave(&priv->lock, flags);
 561
 562         idx = get_cmd_index(q, q->write_ptr, 0);
 563
 564         /* Set up driver data for this TFD */
 565         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 566         txq->txb[q->write_ptr].skb[0] = skb;
 567
 568         /* Init first empty entry in queue's array of Tx/cmd buffers */
 569         out_cmd = txq->cmd[idx];
 570         out_meta = &txq->meta[idx];
 571         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 572         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 573         memset(tx, 0, sizeof(*tx));
 574
 575         /*
 576          * Set up the Tx-command (not MAC!) header.
 577          * Store the chosen Tx queue and TFD index within the sequence field;
 578          * after Tx, uCode's Tx response will return this value so driver can
 579          * locate the frame within the tx queue and do post-tx processing.
 580          */
 581         out_cmd->hdr.cmd = REPLY_TX;
 582         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 583                                 INDEX_TO_SEQ(q->write_ptr)));
 584
 585         /* Copy MAC header from skb into command buffer */
 586         memcpy(tx->hdr, hdr, hdr_len);
 587
 588
 589         if (info->control.hw_key)
 590                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 591
 592         /* TODO need this for burst mode later on */
 593         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 594
 595         /* set is_hcca to 0; it probably will never be implemented */
 596         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 597
 598         /* Total # bytes to be transmitted */
 599         len = (u16)skb->len;
 600         tx->len = cpu_to_le16(len);
 601
 602         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 603         iwl_update_stats(priv, true, fc, len);
 604         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 605         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 606
 607         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 608                 txq->need_update = 1;
 609                 if (qc)
 610                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 611         } else {
 612                 wait_write_ptr = 1;
 613                 txq->need_update = 0;
 614         }
 615
 616         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 617                      le16_to_cpu(out_cmd->hdr.sequence));
 618         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 619         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 620         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 621                            ieee80211_hdrlen(fc));
 622
 623         /*
 624          * Use the first empty entry in this queue's command buffer array
 625          * to contain the Tx command and MAC header concatenated together
 626          * (payload data will be in another buffer).
 627          * Size of this varies, due to varying MAC header length.
 628          * If end is not dword aligned, we'll have 2 extra bytes at the end
 629          * of the MAC header (device reads on dword boundaries).
 630          * We'll tell device about this padding later.
 631          */
 632         len = sizeof(struct iwl3945_tx_cmd) +
 633                         sizeof(struct iwl_cmd_header) + hdr_len;
 634
 635         len_org = len;
 636         len = (len + 3) & ~3;
 637
 638         if (len_org != len)
 639                 len_org = 1;
 640         else
 641                 len_org = 0;
 642
 643         /* Physical address of this Tx command's header (not MAC header!),
 644          * within command buffer array. */
 645         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 646                                     len, PCI_DMA_TODEVICE);
 647         /* we do not map meta data ... so we can safely access address to
 648          * provide to unmap command*/
 649         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 650         pci_unmap_len_set(out_meta, len, len);
 651
 652         /* Add buffer containing Tx command and MAC(!) header to TFD's
 653          * first entry */
 654         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 655                                                    txcmd_phys, len, 1, 0);
 656
 657
 658         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 659          * if any (802.11 null frames have no payload). */
 660         len = skb->len - hdr_len;
 661         if (len) {
 662                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 663                                            len, PCI_DMA_TODEVICE);
 664                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 665                                                            phys_addr, len,
 666                                                            0, U32_PAD(len));
 667         }
 668
 669
 670         /* Tell device the write index *just past* this latest filled TFD */
 671         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 672         rc = iwl_txq_update_write_ptr(priv, txq);
 673         spin_unlock_irqrestore(&priv->lock, flags);
 674
 675         if (rc)
 676                 return rc;
 677
 678         if ((iwl_queue_space(q) < q->high_mark)
 679             && priv->mac80211_registered) {
 680                 if (wait_write_ptr) {
 681                         spin_lock_irqsave(&priv->lock, flags);
 682                         txq->need_update = 1;
 683                         iwl_txq_update_write_ptr(priv, txq);
 684                         spin_unlock_irqrestore(&priv->lock, flags);
 685                 }
 686
 687                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 688         }
 689
 690         return 0;
 691
 692 drop_unlock:
 693         spin_unlock_irqrestore(&priv->lock, flags);
 694 drop:
 695         return -1;
 696 }
 697
 698 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 699
 700 #include "iwl-spectrum.h"
 701
 702 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 703 #define BEACON_TIME_MASK_HIGH   0xFF000000
 704 #define TIME_UNIT               1024
 705
 706 /*
 707  * extended beacon time format
 708  * time in usec will be changed into a 32-bit value in 8:24 format
 709  * the high 1 byte is the beacon counts
 710  * the lower 3 bytes is the time in usec within one beacon interval
 711  */
 712
 713 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 714 {
 715         u32 quot;
 716         u32 rem;
 717         u32 interval = beacon_interval * 1024;
 718
 719         if (!interval || !usec)
 720                 return 0;
 721
 722         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 723         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 724
 725         return (quot << 24) + rem;
 726 }
 727
 728 /* base is usually what we get from ucode with each received frame,
 729  * the same as HW timer counter counting down
 730  */
 731
 732 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 733 {
 734         u32 base_low = base & BEACON_TIME_MASK_LOW;
 735         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 736         u32 interval = beacon_interval * TIME_UNIT;
 737         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 738             (addon & BEACON_TIME_MASK_HIGH);
 739
 740         if (base_low > addon_low)
 741                 res += base_low - addon_low;
 742         else if (base_low < addon_low) {
 743                 res += interval + base_low - addon_low;
 744                 res += (1 << 24);
 745         } else
 746                 res += (1 << 24);
 747
 748         return cpu_to_le32(res);
 749 }
 750
 751 static int iwl3945_get_measurement(struct iwl_priv *priv,
 752                                struct ieee80211_measurement_params *params,
 753                                u8 type)
 754 {
 755         struct iwl_spectrum_cmd spectrum;
 756         struct iwl_rx_packet *res;
 757         struct iwl_host_cmd cmd = {
 758                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 759                 .data = (void *)&spectrum,
 760                 .flags = CMD_WANT_SKB,
 761         };
 762         u32 add_time = le64_to_cpu(params->start_time);
 763         int rc;
 764         int spectrum_resp_status;
 765         int duration = le16_to_cpu(params->duration);
 766
 767         if (iwl_is_associated(priv))
 768                 add_time =
 769                     iwl3945_usecs_to_beacons(
 770                         le64_to_cpu(params->start_time) - priv->last_tsf,
 771                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 772
 773         memset(&spectrum, 0, sizeof(spectrum));
 774
 775         spectrum.channel_count = cpu_to_le16(1);
 776         spectrum.flags =
 777             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 778         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 779         cmd.len = sizeof(spectrum);
 780         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 781
 782         if (iwl_is_associated(priv))
 783                 spectrum.start_time =
 784                     iwl3945_add_beacon_time(priv->last_beacon_time,
 785                                 add_time,
 786                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 787         else
 788                 spectrum.start_time = 0;
 789
 790         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 791         spectrum.channels[0].channel = params->channel;
 792         spectrum.channels[0].type = type;
 793         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 794                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 795                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 796
 797         rc = iwl_send_cmd_sync(priv, &cmd);
 798         if (rc)
 799                 return rc;
 800
 801         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 802         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 803                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 804                 rc = -EIO;
 805         }
 806
 807         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 808         switch (spectrum_resp_status) {
 809         case 0:         /* Command will be handled */
 810                 if (res->u.spectrum.id != 0xff) {
 811                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 812                                                 res->u.spectrum.id);
 813                         priv->measurement_status &= ~MEASUREMENT_READY;
 814                 }
 815                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 816                 rc = 0;
 817                 break;
 818
 819         case 1:         /* Command will not be handled */
 820                 rc = -EAGAIN;
 821                 break;
 822         }
 823
 824         dev_kfree_skb_any(cmd.reply_skb);
 825
 826         return rc;
 827 }
 828 #endif
 829
 830 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 831                                struct iwl_rx_mem_buffer *rxb)
 832 {
 833         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 834         struct iwl_alive_resp *palive;
 835         struct delayed_work *pwork;
 836
 837         palive = &pkt->u.alive_frame;
 838
 839         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 840                        "0x%01X 0x%01X\n",
 841                        palive->is_valid, palive->ver_type,
 842                        palive->ver_subtype);
 843
 844         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 845                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 846                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 847                        sizeof(struct iwl_alive_resp));
 848                 pwork = &priv->init_alive_start;
 849         } else {
 850                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 851                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 852                        sizeof(struct iwl_alive_resp));
 853                 pwork = &priv->alive_start;
 854                 iwl3945_disable_events(priv);
 855         }
 856
 857         /* We delay the ALIVE response by 5ms to
 858          * give the HW RF Kill time to activate... */
 859         if (palive->is_valid == UCODE_VALID_OK)
 860                 queue_delayed_work(priv->workqueue, pwork,
 861                                    msecs_to_jiffies(5));
 862         else
 863                 IWL_WARN(priv, "uCode did not respond OK.\n");
 864 }
 865
 866 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 867                                  struct iwl_rx_mem_buffer *rxb)
 868 {
 869 #ifdef CONFIG_IWLWIFI_DEBUG
 870         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 871 #endif
 872
 873         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 874         return;
 875 }
 876
 877 static void iwl3945_bg_beacon_update(struct work_struct *work)
 878 {
 879         struct iwl_priv *priv =
 880                 container_of(work, struct iwl_priv, beacon_update);
 881         struct sk_buff *beacon;
 882
 883         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 884         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 885
 886         if (!beacon) {
 887                 IWL_ERR(priv, "update beacon failed\n");
 888                 return;
 889         }
 890
 891         mutex_lock(&priv->mutex);
 892         /* new beacon skb is allocated every time; dispose previous.*/
 893         if (priv->ibss_beacon)
 894                 dev_kfree_skb(priv->ibss_beacon);
 895
 896         priv->ibss_beacon = beacon;
 897         mutex_unlock(&priv->mutex);
 898
 899         iwl3945_send_beacon_cmd(priv);
 900 }
 901
 902 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 903                                 struct iwl_rx_mem_buffer *rxb)
 904 {
 905 #ifdef CONFIG_IWLWIFI_DEBUG
 906         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 907         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 908         u8 rate = beacon->beacon_notify_hdr.rate;
 909
 910         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 911                 "tsf %d %d rate %d\n",
 912                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 913                 beacon->beacon_notify_hdr.failure_frame,
 914                 le32_to_cpu(beacon->ibss_mgr_status),
 915                 le32_to_cpu(beacon->high_tsf),
 916                 le32_to_cpu(beacon->low_tsf), rate);
 917 #endif
 918
 919         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 920             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 921                 queue_work(priv->workqueue, &priv->beacon_update);
 922 }
 923
 924 /* Handle notification from uCode that card's power state is changing
 925  * due to software, hardware, or critical temperature RFKILL */
 926 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 927                                     struct iwl_rx_mem_buffer *rxb)
 928 {
 929         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 930         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 931         unsigned long status = priv->status;
 932
 933         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 934                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 935                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 936
 937         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 938                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 939
 940         if (flags & HW_CARD_DISABLED)
 941                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 942         else
 943                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 944
 945
 946         iwl_scan_cancel(priv);
 947
 948         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 949              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 950                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 951                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 952         else
 953                 wake_up_interruptible(&priv->wait_command_queue);
 954 }
 955
 956 /**
 957  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 958  *
 959  * Setup the RX handlers for each of the reply types sent from the uCode
 960  * to the host.
 961  *
 962  * This function chains into the hardware specific files for them to setup
 963  * any hardware specific handlers as well.
 964  */
 965 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 966 {
 967         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 968         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 969         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 970         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 971         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 972         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 973             iwl_rx_pm_debug_statistics_notif;
 974         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 975
 976         /*
 977          * The same handler is used for both the REPLY to a discrete
 978          * statistics request from the host as well as for the periodic
 979          * statistics notifications (after received beacons) from the uCode.
 980          */
 981         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 982         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 983
 984         iwl_setup_spectrum_handlers(priv);
 985         iwl_setup_rx_scan_handlers(priv);
 986         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 987
 988         /* Set up hardware specific Rx handlers */
 989         iwl3945_hw_rx_handler_setup(priv);
 990 }
 991
 992 /************************** RX-FUNCTIONS ****************************/
 993 /*
 994  * Rx theory of operation
 995  *
 996  * The host allocates 32 DMA target addresses and passes the host address
 997  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 998  * 0 to 31
 999  *
1000  * Rx Queue Indexes
1001  * The host/firmware share two index registers for managing the Rx buffers.
1002  *
1003  * The READ index maps to the first position that the firmware may be writing
1004  * to -- the driver can read up to (but not including) this position and get
1005  * good data.
1006  * The READ index is managed by the firmware once the card is enabled.
1007  *
1008  * The WRITE index maps to the last position the driver has read from -- the
1009  * position preceding WRITE is the last slot the firmware can place a packet.
1010  *
1011  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1012  * WRITE = READ.
1013  *
1014  * During initialization, the host sets up the READ queue position to the first
1015  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1016  *
1017  * When the firmware places a packet in a buffer, it will advance the READ index
1018  * and fire the RX interrupt.  The driver can then query the READ index and
1019  * process as many packets as possible, moving the WRITE index forward as it
1020  * resets the Rx queue buffers with new memory.
1021  *
1022  * The management in the driver is as follows:
1023  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1024  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1025  *   to replenish the iwl->rxq->rx_free.
1026  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1027  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1028  *   'processed' and 'read' driver indexes as well)
1029  * + A received packet is processed and handed to the kernel network stack,
1030  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1031  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1032  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1033  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1034  *   were enough free buffers and RX_STALLED is set it is cleared.
1035  *
1036  *
1037  * Driver sequence:
1038  *
1039  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1040  *                            iwl3945_rx_queue_restock
1041  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1042  *                            queue, updates firmware pointers, and updates
1043  *                            the WRITE index.  If insufficient rx_free buffers
1044  *                            are available, schedules iwl3945_rx_replenish
1045  *
1046  * -- enable interrupts --
1047  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1048  *                            READ INDEX, detaching the SKB from the pool.
1049  *                            Moves the packet buffer from queue to rx_used.
1050  *                            Calls iwl3945_rx_queue_restock to refill any empty
1051  *                            slots.
1052  * ...
1053  *
1054  */
1055
1056 /**
1057  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1058  */
1059 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1060                                           dma_addr_t dma_addr)
1061 {
1062         return cpu_to_le32((u32)dma_addr);
1063 }
1064
1065 /**
1066  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1067  *
1068  * If there are slots in the RX queue that need to be restocked,
1069  * and we have free pre-allocated buffers, fill the ranks as much
1070  * as we can, pulling from rx_free.
1071  *
1072  * This moves the 'write' index forward to catch up with 'processed', and
1073  * also updates the memory address in the firmware to reference the new
1074  * target buffer.
1075  */
1076 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1077 {
1078         struct iwl_rx_queue *rxq = &priv->rxq;
1079         struct list_head *element;
1080         struct iwl_rx_mem_buffer *rxb;
1081         unsigned long flags;
1082         int write, rc;
1083
1084         spin_lock_irqsave(&rxq->lock, flags);
1085         write = rxq->write & ~0x7;
1086         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1087                 /* Get next free Rx buffer, remove from free list */
1088                 element = rxq->rx_free.next;
1089                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1090                 list_del(element);
1091
1092                 /* Point to Rx buffer via next RBD in circular buffer */
1093                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1094                 rxq->queue[rxq->write] = rxb;
1095                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1096                 rxq->free_count--;
1097         }
1098         spin_unlock_irqrestore(&rxq->lock, flags);
1099         /* If the pre-allocated buffer pool is dropping low, schedule to
1100          * refill it */
1101         if (rxq->free_count <= RX_LOW_WATERMARK)
1102                 queue_work(priv->workqueue, &priv->rx_replenish);
1103
1104
1105         /* If we've added more space for the firmware to place data, tell it.
1106          * Increment device's write pointer in multiples of 8. */
1107         if ((rxq->write_actual != (rxq->write & ~0x7))
1108             || (abs(rxq->write - rxq->read) > 7)) {
1109                 spin_lock_irqsave(&rxq->lock, flags);
1110                 rxq->need_update = 1;
1111                 spin_unlock_irqrestore(&rxq->lock, flags);
1112                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1113                 if (rc)
1114                         return rc;
1115         }
1116
1117         return 0;
1118 }
1119
1120 /**
1121  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1122  *
1123  * When moving to rx_free an SKB is allocated for the slot.
1124  *
1125  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1126  * This is called as a scheduled work item (except for during initialization)
1127  */
1128 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1129 {
1130         struct iwl_rx_queue *rxq = &priv->rxq;
1131         struct list_head *element;
1132         struct iwl_rx_mem_buffer *rxb;
1133         struct sk_buff *skb;
1134         unsigned long flags;
1135
1136         while (1) {
1137                 spin_lock_irqsave(&rxq->lock, flags);
1138
1139                 if (list_empty(&rxq->rx_used)) {
1140                         spin_unlock_irqrestore(&rxq->lock, flags);
1141                         return;
1142                 }
1143                 spin_unlock_irqrestore(&rxq->lock, flags);
1144
1145                 if (rxq->free_count > RX_LOW_WATERMARK)
1146                         priority |= __GFP_NOWARN;
1147                 /* Alloc a new receive buffer */
1148                 skb = alloc_skb(priv->hw_params.rx_buf_size, priority);
1149                 if (!skb) {
1150                         if (net_ratelimit())
1151                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1152                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1153                             net_ratelimit())
1154                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1155                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1156                                          rxq->free_count);
1157                         /* We don't reschedule replenish work here -- we will
1158                          * call the restock method and if it still needs
1159                          * more buffers it will schedule replenish */
1160                         break;
1161                 }
1162
1163                 spin_lock_irqsave(&rxq->lock, flags);
1164                 if (list_empty(&rxq->rx_used)) {
1165                         spin_unlock_irqrestore(&rxq->lock, flags);
1166                         dev_kfree_skb_any(skb);
1167                         return;
1168                 }
1169                 element = rxq->rx_used.next;
1170                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1171                 list_del(element);
1172                 spin_unlock_irqrestore(&rxq->lock, flags);
1173
1174                 rxb->skb = skb;
1175
1176                 /* If radiotap head is required, reserve some headroom here.
1177                  * The physical head count is a variable rx_stats->phy_count.
1178                  * We reserve 4 bytes here. Plus these extra bytes, the
1179                  * headroom of the physical head should be enough for the
1180                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1181                  */
1182                 skb_reserve(rxb->skb, 4);
1183
1184                 /* Get physical address of RB/SKB */
1185                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1186                                                 rxb->skb->data,
1187                                                 priv->hw_params.rx_buf_size,
1188                                                 PCI_DMA_FROMDEVICE);
1189
1190                 spin_lock_irqsave(&rxq->lock, flags);
1191                 list_add_tail(&rxb->list, &rxq->rx_free);
1192                 priv->alloc_rxb_skb++;
1193                 rxq->free_count++;
1194                 spin_unlock_irqrestore(&rxq->lock, flags);
1195         }
1196 }
1197
1198 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1199 {
1200         unsigned long flags;
1201         int i;
1202         spin_lock_irqsave(&rxq->lock, flags);
1203         INIT_LIST_HEAD(&rxq->rx_free);
1204         INIT_LIST_HEAD(&rxq->rx_used);
1205         /* Fill the rx_used queue with _all_ of the Rx buffers */
1206         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1207                 /* In the reset function, these buffers may have been allocated
1208                  * to an SKB, so we need to unmap and free potential storage */
1209                 if (rxq->pool[i].skb != NULL) {
1210                         pci_unmap_single(priv->pci_dev,
1211                                          rxq->pool[i].real_dma_addr,
1212                                          priv->hw_params.rx_buf_size,
1213                                          PCI_DMA_FROMDEVICE);
1214                         priv->alloc_rxb_skb--;
1215                         dev_kfree_skb(rxq->pool[i].skb);
1216                         rxq->pool[i].skb = NULL;
1217                 }
1218                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1219         }
1220
1221         /* Set us so that we have processed and used all buffers, but have
1222          * not restocked the Rx queue with fresh buffers */
1223         rxq->read = rxq->write = 0;
1224         rxq->free_count = 0;
1225         rxq->write_actual = 0;
1226         spin_unlock_irqrestore(&rxq->lock, flags);
1227 }
1228
1229 void iwl3945_rx_replenish(void *data)
1230 {
1231         struct iwl_priv *priv = data;
1232         unsigned long flags;
1233
1234         iwl3945_rx_allocate(priv, GFP_KERNEL);
1235
1236         spin_lock_irqsave(&priv->lock, flags);
1237         iwl3945_rx_queue_restock(priv);
1238         spin_unlock_irqrestore(&priv->lock, flags);
1239 }
1240
1241 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1242 {
1243         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1244
1245         iwl3945_rx_queue_restock(priv);
1246 }
1247
1248
1249 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1250  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1251  * This free routine walks the list of POOL entries and if SKB is set to
1252  * non NULL it is unmapped and freed
1253  */
1254 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1255 {
1256         int i;
1257         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1258                 if (rxq->pool[i].skb != NULL) {
1259                         pci_unmap_single(priv->pci_dev,
1260                                          rxq->pool[i].real_dma_addr,
1261                                          priv->hw_params.rx_buf_size,
1262                                          PCI_DMA_FROMDEVICE);
1263                         dev_kfree_skb(rxq->pool[i].skb);
1264                 }
1265         }
1266
1267         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1268                             rxq->dma_addr);
1269         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1270                             rxq->rb_stts, rxq->rb_stts_dma);
1271         rxq->bd = NULL;
1272         rxq->rb_stts  = NULL;
1273 }
1274
1275
1276 /* Convert linear signal-to-noise ratio into dB */
1277 static u8 ratio2dB[100] = {
1278 /*       0   1   2   3   4   5   6   7   8   9 */
1279          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1280         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1281         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1282         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1283         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1284         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1285         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1286         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1287         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1288         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1289 };
1290
1291 /* Calculates a relative dB value from a ratio of linear
1292  *   (i.e. not dB) signal levels.
1293  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1294 int iwl3945_calc_db_from_ratio(int sig_ratio)
1295 {
1296         /* 1000:1 or higher just report as 60 dB */
1297         if (sig_ratio >= 1000)
1298                 return 60;
1299
1300         /* 100:1 or higher, divide by 10 and use table,
1301          *   add 20 dB to make up for divide by 10 */
1302         if (sig_ratio >= 100)
1303                 return 20 + (int)ratio2dB[sig_ratio/10];
1304
1305         /* We shouldn't see this */
1306         if (sig_ratio < 1)
1307                 return 0;
1308
1309         /* Use table for ratios 1:1 - 99:1 */
1310         return (int)ratio2dB[sig_ratio];
1311 }
1312
1313 #define PERFECT_RSSI (-20) /* dBm */
1314 #define WORST_RSSI (-95)   /* dBm */
1315 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1316
1317 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1318  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1319  *   about formulas used below. */
1320 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1321 {
1322         int sig_qual;
1323         int degradation = PERFECT_RSSI - rssi_dbm;
1324
1325         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1326          * as indicator; formula is (signal dbm - noise dbm).
1327          * SNR at or above 40 is a great signal (100%).
1328          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1329          * Weakest usable signal is usually 10 - 15 dB SNR. */
1330         if (noise_dbm) {
1331                 if (rssi_dbm - noise_dbm >= 40)
1332                         return 100;
1333                 else if (rssi_dbm < noise_dbm)
1334                         return 0;
1335                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1336
1337         /* Else use just the signal level.
1338          * This formula is a least squares fit of data points collected and
1339          *   compared with a reference system that had a percentage (%) display
1340          *   for signal quality. */
1341         } else
1342                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1343                             (15 * RSSI_RANGE + 62 * degradation)) /
1344                            (RSSI_RANGE * RSSI_RANGE);
1345
1346         if (sig_qual > 100)
1347                 sig_qual = 100;
1348         else if (sig_qual < 1)
1349                 sig_qual = 0;
1350
1351         return sig_qual;
1352 }
1353
1354 /**
1355  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1356  *
1357  * Uses the priv->rx_handlers callback function array to invoke
1358  * the appropriate handlers, including command responses,
1359  * frame-received notifications, and other notifications.
1360  */
1361 static void iwl3945_rx_handle(struct iwl_priv *priv)
1362 {
1363         struct iwl_rx_mem_buffer *rxb;
1364         struct iwl_rx_packet *pkt;
1365         struct iwl_rx_queue *rxq = &priv->rxq;
1366         u32 r, i;
1367         int reclaim;
1368         unsigned long flags;
1369         u8 fill_rx = 0;
1370         u32 count = 8;
1371         int total_empty = 0;
1372
1373         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1374          * buffer that the driver may process (last buffer filled by ucode). */
1375         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1376         i = rxq->read;
1377
1378         /* calculate total frames need to be restock after handling RX */
1379         total_empty = r - priv->rxq.write_actual;
1380         if (total_empty < 0)
1381                 total_empty += RX_QUEUE_SIZE;
1382
1383         if (total_empty > (RX_QUEUE_SIZE / 2))
1384                 fill_rx = 1;
1385         /* Rx interrupt, but nothing sent from uCode */
1386         if (i == r)
1387                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1388
1389         while (i != r) {
1390                 rxb = rxq->queue[i];
1391
1392                 /* If an RXB doesn't have a Rx queue slot associated with it,
1393                  * then a bug has been introduced in the queue refilling
1394                  * routines -- catch it here */
1395                 BUG_ON(rxb == NULL);
1396
1397                 rxq->queue[i] = NULL;
1398
1399                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1400                                 priv->hw_params.rx_buf_size,
1401                                 PCI_DMA_FROMDEVICE);
1402                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1403
1404                 trace_iwlwifi_dev_rx(priv, pkt,
1405                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1406
1407                 /* Reclaim a command buffer only if this packet is a response
1408                  *   to a (driver-originated) command.
1409                  * If the packet (e.g. Rx frame) originated from uCode,
1410                  *   there is no command buffer to reclaim.
1411                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1412                  *   but apparently a few don't get set; catch them here. */
1413                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1414                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1415                         (pkt->hdr.cmd != REPLY_TX);
1416
1417                 /* Based on type of command response or notification,
1418                  *   handle those that need handling via function in
1419                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1420                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1421                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1422                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1423                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1424                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1425                 } else {
1426                         /* No handling needed */
1427                         IWL_DEBUG_RX(priv, "r %d i %d No handler needed for %s, 0x%02x\n",
1428                                 r, i, get_cmd_string(pkt->hdr.cmd),
1429                                 pkt->hdr.cmd);
1430                 }
1431
1432                 if (reclaim) {
1433                         /* Invoke any callbacks, transfer the skb to caller, and
1434                          * fire off the (possibly) blocking iwl_send_cmd()
1435                          * as we reclaim the driver command queue */
1436                         if (rxb && rxb->skb)
1437                                 iwl_tx_cmd_complete(priv, rxb);
1438                         else
1439                                 IWL_WARN(priv, "Claim null rxb?\n");
1440                 }
1441
1442                 /* For now we just don't re-use anything.  We can tweak this
1443                  * later to try and re-use notification packets and SKBs that
1444                  * fail to Rx correctly */
1445                 if (rxb->skb != NULL) {
1446                         priv->alloc_rxb_skb--;
1447                         dev_kfree_skb_any(rxb->skb);
1448                         rxb->skb = NULL;
1449                 }
1450
1451                 spin_lock_irqsave(&rxq->lock, flags);
1452                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1453                 spin_unlock_irqrestore(&rxq->lock, flags);
1454                 i = (i + 1) & RX_QUEUE_MASK;
1455                 /* If there are a lot of unused frames,
1456                  * restock the Rx queue so ucode won't assert. */
1457                 if (fill_rx) {
1458                         count++;
1459                         if (count >= 8) {
1460                                 priv->rxq.read = i;
1461                                 iwl3945_rx_replenish_now(priv);
1462                                 count = 0;
1463                         }
1464                 }
1465         }
1466
1467         /* Backtrack one entry */
1468         priv->rxq.read = i;
1469         if (fill_rx)
1470                 iwl3945_rx_replenish_now(priv);
1471         else
1472                 iwl3945_rx_queue_restock(priv);
1473 }
1474
1475 /* call this function to flush any scheduled tasklet */
1476 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1477 {
1478         /* wait to make sure we flush pending tasklet*/
1479         synchronize_irq(priv->pci_dev->irq);
1480         tasklet_kill(&priv->irq_tasklet);
1481 }
1482
1483 #ifdef CONFIG_IWLWIFI_DEBUG
1484 static const char *desc_lookup(int i)
1485 {
1486         switch (i) {
1487         case 1:
1488                 return "FAIL";
1489         case 2:
1490                 return "BAD_PARAM";
1491         case 3:
1492                 return "BAD_CHECKSUM";
1493         case 4:
1494                 return "NMI_INTERRUPT";
1495         case 5:
1496                 return "SYSASSERT";
1497         case 6:
1498                 return "FATAL_ERROR";
1499         }
1500
1501         return "UNKNOWN";
1502 }
1503
1504 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1505 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1506
1507 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1508 {
1509         u32 i;
1510         u32 desc, time, count, base, data1;
1511         u32 blink1, blink2, ilink1, ilink2;
1512
1513         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1514
1515         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1516                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1517                 return;
1518         }
1519
1520
1521         count = iwl_read_targ_mem(priv, base);
1522
1523         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1524                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1525                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1526                         priv->status, count);
1527         }
1528
1529         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1530                   "ilink1  nmiPC   Line\n");
1531         for (i = ERROR_START_OFFSET;
1532              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1533              i += ERROR_ELEM_SIZE) {
1534                 desc = iwl_read_targ_mem(priv, base + i);
1535                 time =
1536                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1537                 blink1 =
1538                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1539                 blink2 =
1540                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1541                 ilink1 =
1542                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1543                 ilink2 =
1544                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1545                 data1 =
1546                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1547
1548                 IWL_ERR(priv,
1549                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1550                         desc_lookup(desc), desc, time, blink1, blink2,
1551                         ilink1, ilink2, data1);
1552                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1553                                         0, blink1, blink2, ilink1, ilink2);
1554         }
1555 }
1556
1557 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1558
1559 /**
1560  * iwl3945_print_event_log - Dump error event log to syslog
1561  *
1562  */
1563 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1564                                 u32 num_events, u32 mode)
1565 {
1566         u32 i;
1567         u32 base;       /* SRAM byte address of event log header */
1568         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1569         u32 ptr;        /* SRAM byte address of log data */
1570         u32 ev, time, data; /* event log data */
1571
1572         if (num_events == 0)
1573                 return;
1574
1575         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1576
1577         if (mode == 0)
1578                 event_size = 2 * sizeof(u32);
1579         else
1580                 event_size = 3 * sizeof(u32);
1581
1582         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1583
1584         /* "time" is actually "data" for mode 0 (no timestamp).
1585          * place event id # at far right for easier visual parsing. */
1586         for (i = 0; i < num_events; i++) {
1587                 ev = iwl_read_targ_mem(priv, ptr);
1588                 ptr += sizeof(u32);
1589                 time = iwl_read_targ_mem(priv, ptr);
1590                 ptr += sizeof(u32);
1591                 if (mode == 0) {
1592                         /* data, ev */
1593                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1594                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1595                 } else {
1596                         data = iwl_read_targ_mem(priv, ptr);
1597                         ptr += sizeof(u32);
1598                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1599                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1600                 }
1601         }
1602 }
1603
1604 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1605 {
1606         u32 base;       /* SRAM byte address of event log header */
1607         u32 capacity;   /* event log capacity in # entries */
1608         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1609         u32 num_wraps;  /* # times uCode wrapped to top of log */
1610         u32 next_entry; /* index of next entry to be written by uCode */
1611         u32 size;       /* # entries that we'll print */
1612
1613         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1614         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1615                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1616                 return;
1617         }
1618
1619         /* event log header */
1620         capacity = iwl_read_targ_mem(priv, base);
1621         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1622         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1623         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1624
1625         size = num_wraps ? capacity : next_entry;
1626
1627         /* bail out if nothing in log */
1628         if (size == 0) {
1629                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1630                 return;
1631         }
1632
1633         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1634                   size, num_wraps);
1635
1636         /* if uCode has wrapped back to top of log, start at the oldest entry,
1637          * i.e the next one that uCode would fill. */
1638         if (num_wraps)
1639                 iwl3945_print_event_log(priv, next_entry,
1640                                     capacity - next_entry, mode);
1641
1642         /* (then/else) start at top of log */
1643         iwl3945_print_event_log(priv, 0, next_entry, mode);
1644
1645 }
1646 #else
1647 void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1648 {
1649 }
1650
1651 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1652 {
1653 }
1654
1655 #endif
1656
1657 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1658 {
1659         u32 inta, handled = 0;
1660         u32 inta_fh;
1661         unsigned long flags;
1662 #ifdef CONFIG_IWLWIFI_DEBUG
1663         u32 inta_mask;
1664 #endif
1665
1666         spin_lock_irqsave(&priv->lock, flags);
1667
1668         /* Ack/clear/reset pending uCode interrupts.
1669          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1670          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1671         inta = iwl_read32(priv, CSR_INT);
1672         iwl_write32(priv, CSR_INT, inta);
1673
1674         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1675          * Any new interrupts that happen after this, either while we're
1676          * in this tasklet, or later, will show up in next ISR/tasklet. */
1677         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1678         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1679
1680 #ifdef CONFIG_IWLWIFI_DEBUG
1681         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1682                 /* just for debug */
1683                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1684                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1685                               inta, inta_mask, inta_fh);
1686         }
1687 #endif
1688
1689         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1690          * atomic, make sure that inta covers all the interrupts that
1691          * we've discovered, even if FH interrupt came in just after
1692          * reading CSR_INT. */
1693         if (inta_fh & CSR39_FH_INT_RX_MASK)
1694                 inta |= CSR_INT_BIT_FH_RX;
1695         if (inta_fh & CSR39_FH_INT_TX_MASK)
1696                 inta |= CSR_INT_BIT_FH_TX;
1697
1698         /* Now service all interrupt bits discovered above. */
1699         if (inta & CSR_INT_BIT_HW_ERR) {
1700                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1701
1702                 /* Tell the device to stop sending interrupts */
1703                 iwl_disable_interrupts(priv);
1704
1705                 priv->isr_stats.hw++;
1706                 iwl_irq_handle_error(priv);
1707
1708                 handled |= CSR_INT_BIT_HW_ERR;
1709
1710                 spin_unlock_irqrestore(&priv->lock, flags);
1711
1712                 return;
1713         }
1714
1715 #ifdef CONFIG_IWLWIFI_DEBUG
1716         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1717                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1718                 if (inta & CSR_INT_BIT_SCD) {
1719                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1720                                       "the frame/frames.\n");
1721                         priv->isr_stats.sch++;
1722                 }
1723
1724                 /* Alive notification via Rx interrupt will do the real work */
1725                 if (inta & CSR_INT_BIT_ALIVE) {
1726                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1727                         priv->isr_stats.alive++;
1728                 }
1729         }
1730 #endif
1731         /* Safely ignore these bits for debug checks below */
1732         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1733
1734         /* Error detected by uCode */
1735         if (inta & CSR_INT_BIT_SW_ERR) {
1736                 IWL_ERR(priv, "Microcode SW error detected. "
1737                         "Restarting 0x%X.\n", inta);
1738                 priv->isr_stats.sw++;
1739                 priv->isr_stats.sw_err = inta;
1740                 iwl_irq_handle_error(priv);
1741                 handled |= CSR_INT_BIT_SW_ERR;
1742         }
1743
1744         /* uCode wakes up after power-down sleep */
1745         if (inta & CSR_INT_BIT_WAKEUP) {
1746                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1747                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1748                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1749                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1750                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1751                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1752                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1753                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1754
1755                 priv->isr_stats.wakeup++;
1756                 handled |= CSR_INT_BIT_WAKEUP;
1757         }
1758
1759         /* All uCode command responses, including Tx command responses,
1760          * Rx "responses" (frame-received notification), and other
1761          * notifications from uCode come through here*/
1762         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1763                 iwl3945_rx_handle(priv);
1764                 priv->isr_stats.rx++;
1765                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1766         }
1767
1768         if (inta & CSR_INT_BIT_FH_TX) {
1769                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1770                 priv->isr_stats.tx++;
1771
1772                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1773                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1774                                         (FH39_SRVC_CHNL), 0x0);
1775                 handled |= CSR_INT_BIT_FH_TX;
1776         }
1777
1778         if (inta & ~handled) {
1779                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1780                 priv->isr_stats.unhandled++;
1781         }
1782
1783         if (inta & ~priv->inta_mask) {
1784                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1785                          inta & ~priv->inta_mask);
1786                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1787         }
1788
1789         /* Re-enable all interrupts */
1790         /* only Re-enable if disabled by irq */
1791         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1792                 iwl_enable_interrupts(priv);
1793
1794 #ifdef CONFIG_IWLWIFI_DEBUG
1795         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1796                 inta = iwl_read32(priv, CSR_INT);
1797                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1798                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1799                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1800                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1801         }
1802 #endif
1803         spin_unlock_irqrestore(&priv->lock, flags);
1804 }
1805
1806 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1807                                          enum ieee80211_band band,
1808                                      u8 is_active, u8 n_probes,
1809                                      struct iwl3945_scan_channel *scan_ch)
1810 {
1811         struct ieee80211_channel *chan;
1812         const struct ieee80211_supported_band *sband;
1813         const struct iwl_channel_info *ch_info;
1814         u16 passive_dwell = 0;
1815         u16 active_dwell = 0;
1816         int added, i;
1817
1818         sband = iwl_get_hw_mode(priv, band);
1819         if (!sband)
1820                 return 0;
1821
1822         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1823         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1824
1825         if (passive_dwell <= active_dwell)
1826                 passive_dwell = active_dwell + 1;
1827
1828         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1829                 chan = priv->scan_request->channels[i];
1830
1831                 if (chan->band != band)
1832                         continue;
1833
1834                 scan_ch->channel = chan->hw_value;
1835
1836                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1837                 if (!is_channel_valid(ch_info)) {
1838                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1839                                        scan_ch->channel);
1840                         continue;
1841                 }
1842
1843                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1844                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1845                 /* If passive , set up for auto-switch
1846                  *  and use long active_dwell time.
1847                  */
1848                 if (!is_active || is_channel_passive(ch_info) ||
1849                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1850                         scan_ch->type = 0;      /* passive */
1851                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1852                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1853                 } else {
1854                         scan_ch->type = 1;      /* active */
1855                 }
1856
1857                 /* Set direct probe bits. These may be used both for active
1858                  * scan channels (probes gets sent right away),
1859                  * or for passive channels (probes get se sent only after
1860                  * hearing clear Rx packet).*/
1861                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1862                         if (n_probes)
1863                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1864                 } else {
1865                         /* uCode v1 does not allow setting direct probe bits on
1866                          * passive channel. */
1867                         if ((scan_ch->type & 1) && n_probes)
1868                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1869                 }
1870
1871                 /* Set txpower levels to defaults */
1872                 scan_ch->tpc.dsp_atten = 110;
1873                 /* scan_pwr_info->tpc.dsp_atten; */
1874
1875                 /*scan_pwr_info->tpc.tx_gain; */
1876                 if (band == IEEE80211_BAND_5GHZ)
1877                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1878                 else {
1879                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1880                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1881                          * power level:
1882                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1883                          */
1884                 }
1885
1886                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1887                                scan_ch->channel,
1888                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1889                                (scan_ch->type & 1) ?
1890                                active_dwell : passive_dwell);
1891
1892                 scan_ch++;
1893                 added++;
1894         }
1895
1896         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1897         return added;
1898 }
1899
1900 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1901                               struct ieee80211_rate *rates)
1902 {
1903         int i;
1904
1905         for (i = 0; i < IWL_RATE_COUNT; i++) {
1906                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1907                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1908                 rates[i].hw_value_short = i;
1909                 rates[i].flags = 0;
1910                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1911                         /*
1912                          * If CCK != 1M then set short preamble rate flag.
1913                          */
1914                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1915                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1916                 }
1917         }
1918 }
1919
1920 /******************************************************************************
1921  *
1922  * uCode download functions
1923  *
1924  ******************************************************************************/
1925
1926 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1927 {
1928         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1929         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1930         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1931         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1932         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1933         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1934 }
1935
1936 /**
1937  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1938  *     looking at all data.
1939  */
1940 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1941 {
1942         u32 val;
1943         u32 save_len = len;
1944         int rc = 0;
1945         u32 errcnt;
1946
1947         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1948
1949         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1950                                IWL39_RTC_INST_LOWER_BOUND);
1951
1952         errcnt = 0;
1953         for (; len > 0; len -= sizeof(u32), image++) {
1954                 /* read data comes through single port, auto-incr addr */
1955                 /* NOTE: Use the debugless read so we don't flood kernel log
1956                  * if IWL_DL_IO is set */
1957                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1958                 if (val != le32_to_cpu(*image)) {
1959                         IWL_ERR(priv, "uCode INST section is invalid at "
1960                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1961                                   save_len - len, val, le32_to_cpu(*image));
1962                         rc = -EIO;
1963                         errcnt++;
1964                         if (errcnt >= 20)
1965                                 break;
1966                 }
1967         }
1968
1969
1970         if (!errcnt)
1971                 IWL_DEBUG_INFO(priv,
1972                         "ucode image in INSTRUCTION memory is good\n");
1973
1974         return rc;
1975 }
1976
1977
1978 /**
1979  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1980  *   using sample data 100 bytes apart.  If these sample points are good,
1981  *   it's a pretty good bet that everything between them is good, too.
1982  */
1983 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1984 {
1985         u32 val;
1986         int rc = 0;
1987         u32 errcnt = 0;
1988         u32 i;
1989
1990         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1991
1992         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1993                 /* read data comes through single port, auto-incr addr */
1994                 /* NOTE: Use the debugless read so we don't flood kernel log
1995                  * if IWL_DL_IO is set */
1996                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1997                         i + IWL39_RTC_INST_LOWER_BOUND);
1998                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1999                 if (val != le32_to_cpu(*image)) {
2000 #if 0 /* Enable this if you want to see details */
2001                         IWL_ERR(priv, "uCode INST section is invalid at "
2002                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2003                                   i, val, *image);
2004 #endif
2005                         rc = -EIO;
2006                         errcnt++;
2007                         if (errcnt >= 3)
2008                                 break;
2009                 }
2010         }
2011
2012         return rc;
2013 }
2014
2015
2016 /**
2017  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2018  *    and verify its contents
2019  */
2020 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2021 {
2022         __le32 *image;
2023         u32 len;
2024         int rc = 0;
2025
2026         /* Try bootstrap */
2027         image = (__le32 *)priv->ucode_boot.v_addr;
2028         len = priv->ucode_boot.len;
2029         rc = iwl3945_verify_inst_sparse(priv, image, len);
2030         if (rc == 0) {
2031                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2032                 return 0;
2033         }
2034
2035         /* Try initialize */
2036         image = (__le32 *)priv->ucode_init.v_addr;
2037         len = priv->ucode_init.len;
2038         rc = iwl3945_verify_inst_sparse(priv, image, len);
2039         if (rc == 0) {
2040                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2041                 return 0;
2042         }
2043
2044         /* Try runtime/protocol */
2045         image = (__le32 *)priv->ucode_code.v_addr;
2046         len = priv->ucode_code.len;
2047         rc = iwl3945_verify_inst_sparse(priv, image, len);
2048         if (rc == 0) {
2049                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2050                 return 0;
2051         }
2052
2053         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2054
2055         /* Since nothing seems to match, show first several data entries in
2056          * instruction SRAM, so maybe visual inspection will give a clue.
2057          * Selection of bootstrap image (vs. other images) is arbitrary. */
2058         image = (__le32 *)priv->ucode_boot.v_addr;
2059         len = priv->ucode_boot.len;
2060         rc = iwl3945_verify_inst_full(priv, image, len);
2061
2062         return rc;
2063 }
2064
2065 static void iwl3945_nic_start(struct iwl_priv *priv)
2066 {
2067         /* Remove all resets to allow NIC to operate */
2068         iwl_write32(priv, CSR_RESET, 0);
2069 }
2070
2071 /**
2072  * iwl3945_read_ucode - Read uCode images from disk file.
2073  *
2074  * Copy into buffers for card to fetch via bus-mastering
2075  */
2076 static int iwl3945_read_ucode(struct iwl_priv *priv)
2077 {
2078         const struct iwl_ucode_header *ucode;
2079         int ret = -EINVAL, index;
2080         const struct firmware *ucode_raw;
2081         /* firmware file name contains uCode/driver compatibility version */
2082         const char *name_pre = priv->cfg->fw_name_pre;
2083         const unsigned int api_max = priv->cfg->ucode_api_max;
2084         const unsigned int api_min = priv->cfg->ucode_api_min;
2085         char buf[25];
2086         u8 *src;
2087         size_t len;
2088         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2089
2090         /* Ask kernel firmware_class module to get the boot firmware off disk.
2091          * request_firmware() is synchronous, file is in memory on return. */
2092         for (index = api_max; index >= api_min; index--) {
2093                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2094                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2095                 if (ret < 0) {
2096                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2097                                   buf, ret);
2098                         if (ret == -ENOENT)
2099                                 continue;
2100                         else
2101                                 goto error;
2102                 } else {
2103                         if (index < api_max)
2104                                 IWL_ERR(priv, "Loaded firmware %s, "
2105                                         "which is deprecated. "
2106                                         " Please use API v%u instead.\n",
2107                                           buf, api_max);
2108                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2109                                        "(%zd bytes) from disk\n",
2110                                        buf, ucode_raw->size);
2111                         break;
2112                 }
2113         }
2114
2115         if (ret < 0)
2116                 goto error;
2117
2118         /* Make sure that we got at least our header! */
2119         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2120                 IWL_ERR(priv, "File size way too small!\n");
2121                 ret = -EINVAL;
2122                 goto err_release;
2123         }
2124
2125         /* Data from ucode file:  header followed by uCode images */
2126         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2127
2128         priv->ucode_ver = le32_to_cpu(ucode->ver);
2129         api_ver = IWL_UCODE_API(priv->ucode_ver);
2130         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2131         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2132         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2133         init_data_size =
2134                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2135         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2136         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2137
2138         /* api_ver should match the api version forming part of the
2139          * firmware filename ... but we don't check for that and only rely
2140          * on the API version read from firmware header from here on forward */
2141
2142         if (api_ver < api_min || api_ver > api_max) {
2143                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2144                           "Driver supports v%u, firmware is v%u.\n",
2145                           api_max, api_ver);
2146                 priv->ucode_ver = 0;
2147                 ret = -EINVAL;
2148                 goto err_release;
2149         }
2150         if (api_ver != api_max)
2151                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2152                           "got %u. New firmware can be obtained "
2153                           "from http://www.intellinuxwireless.org.\n",
2154                           api_max, api_ver);
2155
2156         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2157                 IWL_UCODE_MAJOR(priv->ucode_ver),
2158                 IWL_UCODE_MINOR(priv->ucode_ver),
2159                 IWL_UCODE_API(priv->ucode_ver),
2160                 IWL_UCODE_SERIAL(priv->ucode_ver));
2161
2162         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2163                        priv->ucode_ver);
2164         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2165                        inst_size);
2166         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2167                        data_size);
2168         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2169                        init_size);
2170         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2171                        init_data_size);
2172         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2173                        boot_size);
2174
2175
2176         /* Verify size of file vs. image size info in file's header */
2177         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2178                 inst_size + data_size + init_size +
2179                 init_data_size + boot_size) {
2180
2181                 IWL_DEBUG_INFO(priv,
2182                         "uCode file size %zd does not match expected size\n",
2183                         ucode_raw->size);
2184                 ret = -EINVAL;
2185                 goto err_release;
2186         }
2187
2188         /* Verify that uCode images will fit in card's SRAM */
2189         if (inst_size > IWL39_MAX_INST_SIZE) {
2190                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2191                                inst_size);
2192                 ret = -EINVAL;
2193                 goto err_release;
2194         }
2195
2196         if (data_size > IWL39_MAX_DATA_SIZE) {
2197                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2198                                data_size);
2199                 ret = -EINVAL;
2200                 goto err_release;
2201         }
2202         if (init_size > IWL39_MAX_INST_SIZE) {
2203                 IWL_DEBUG_INFO(priv,
2204                                 "uCode init instr len %d too large to fit in\n",
2205                                 init_size);
2206                 ret = -EINVAL;
2207                 goto err_release;
2208         }
2209         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2210                 IWL_DEBUG_INFO(priv,
2211                                 "uCode init data len %d too large to fit in\n",
2212                                 init_data_size);
2213                 ret = -EINVAL;
2214                 goto err_release;
2215         }
2216         if (boot_size > IWL39_MAX_BSM_SIZE) {
2217                 IWL_DEBUG_INFO(priv,
2218                                 "uCode boot instr len %d too large to fit in\n",
2219                                 boot_size);
2220                 ret = -EINVAL;
2221                 goto err_release;
2222         }
2223
2224         /* Allocate ucode buffers for card's bus-master loading ... */
2225
2226         /* Runtime instructions and 2 copies of data:
2227          * 1) unmodified from disk
2228          * 2) backup cache for save/restore during power-downs */
2229         priv->ucode_code.len = inst_size;
2230         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2231
2232         priv->ucode_data.len = data_size;
2233         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2234
2235         priv->ucode_data_backup.len = data_size;
2236         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2237
2238         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2239             !priv->ucode_data_backup.v_addr)
2240                 goto err_pci_alloc;
2241
2242         /* Initialization instructions and data */
2243         if (init_size && init_data_size) {
2244                 priv->ucode_init.len = init_size;
2245                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2246
2247                 priv->ucode_init_data.len = init_data_size;
2248                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2249
2250                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2251                         goto err_pci_alloc;
2252         }
2253
2254         /* Bootstrap (instructions only, no data) */
2255         if (boot_size) {
2256                 priv->ucode_boot.len = boot_size;
2257                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2258
2259                 if (!priv->ucode_boot.v_addr)
2260                         goto err_pci_alloc;
2261         }
2262
2263         /* Copy images into buffers for card's bus-master reads ... */
2264
2265         /* Runtime instructions (first block of data in file) */
2266         len = inst_size;
2267         IWL_DEBUG_INFO(priv,
2268                 "Copying (but not loading) uCode instr len %zd\n", len);
2269         memcpy(priv->ucode_code.v_addr, src, len);
2270         src += len;
2271
2272         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2273                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2274
2275         /* Runtime data (2nd block)
2276          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2277         len = data_size;
2278         IWL_DEBUG_INFO(priv,
2279                 "Copying (but not loading) uCode data len %zd\n", len);
2280         memcpy(priv->ucode_data.v_addr, src, len);
2281         memcpy(priv->ucode_data_backup.v_addr, src, len);
2282         src += len;
2283
2284         /* Initialization instructions (3rd block) */
2285         if (init_size) {
2286                 len = init_size;
2287                 IWL_DEBUG_INFO(priv,
2288                         "Copying (but not loading) init instr len %zd\n", len);
2289                 memcpy(priv->ucode_init.v_addr, src, len);
2290                 src += len;
2291         }
2292
2293         /* Initialization data (4th block) */
2294         if (init_data_size) {
2295                 len = init_data_size;
2296                 IWL_DEBUG_INFO(priv,
2297                         "Copying (but not loading) init data len %zd\n", len);
2298                 memcpy(priv->ucode_init_data.v_addr, src, len);
2299                 src += len;
2300         }
2301
2302         /* Bootstrap instructions (5th block) */
2303         len = boot_size;
2304         IWL_DEBUG_INFO(priv,
2305                 "Copying (but not loading) boot instr len %zd\n", len);
2306         memcpy(priv->ucode_boot.v_addr, src, len);
2307
2308         /* We have our copies now, allow OS release its copies */
2309         release_firmware(ucode_raw);
2310         return 0;
2311
2312  err_pci_alloc:
2313         IWL_ERR(priv, "failed to allocate pci memory\n");
2314         ret = -ENOMEM;
2315         iwl3945_dealloc_ucode_pci(priv);
2316
2317  err_release:
2318         release_firmware(ucode_raw);
2319
2320  error:
2321         return ret;
2322 }
2323
2324
2325 /**
2326  * iwl3945_set_ucode_ptrs - Set uCode address location
2327  *
2328  * Tell initialization uCode where to find runtime uCode.
2329  *
2330  * BSM registers initially contain pointers to initialization uCode.
2331  * We need to replace them to load runtime uCode inst and data,
2332  * and to save runtime data when powering down.
2333  */
2334 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2335 {
2336         dma_addr_t pinst;
2337         dma_addr_t pdata;
2338
2339         /* bits 31:0 for 3945 */
2340         pinst = priv->ucode_code.p_addr;
2341         pdata = priv->ucode_data_backup.p_addr;
2342
2343         /* Tell bootstrap uCode where to find image to load */
2344         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2345         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2346         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2347                                  priv->ucode_data.len);
2348
2349         /* Inst byte count must be last to set up, bit 31 signals uCode
2350          *   that all new ptr/size info is in place */
2351         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2352                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2353
2354         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2355
2356         return 0;
2357 }
2358
2359 /**
2360  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2361  *
2362  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2363  *
2364  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2365  */
2366 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2367 {
2368         /* Check alive response for "valid" sign from uCode */
2369         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2370                 /* We had an error bringing up the hardware, so take it
2371                  * all the way back down so we can try again */
2372                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2373                 goto restart;
2374         }
2375
2376         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2377          * This is a paranoid check, because we would not have gotten the
2378          * "initialize" alive if code weren't properly loaded.  */
2379         if (iwl3945_verify_ucode(priv)) {
2380                 /* Runtime instruction load was bad;
2381                  * take it all the way back down so we can try again */
2382                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2383                 goto restart;
2384         }
2385
2386         /* Send pointers to protocol/runtime uCode image ... init code will
2387          * load and launch runtime uCode, which will send us another "Alive"
2388          * notification. */
2389         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2390         if (iwl3945_set_ucode_ptrs(priv)) {
2391                 /* Runtime instruction load won't happen;
2392                  * take it all the way back down so we can try again */
2393                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2394                 goto restart;
2395         }
2396         return;
2397
2398  restart:
2399         queue_work(priv->workqueue, &priv->restart);
2400 }
2401
2402 /**
2403  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2404  *                   from protocol/runtime uCode (initialization uCode's
2405  *                   Alive gets handled by iwl3945_init_alive_start()).
2406  */
2407 static void iwl3945_alive_start(struct iwl_priv *priv)
2408 {
2409         int thermal_spin = 0;
2410         u32 rfkill;
2411
2412         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2413
2414         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2415                 /* We had an error bringing up the hardware, so take it
2416                  * all the way back down so we can try again */
2417                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2418                 goto restart;
2419         }
2420
2421         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2422          * This is a paranoid check, because we would not have gotten the
2423          * "runtime" alive if code weren't properly loaded.  */
2424         if (iwl3945_verify_ucode(priv)) {
2425                 /* Runtime instruction load was bad;
2426                  * take it all the way back down so we can try again */
2427                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2428                 goto restart;
2429         }
2430
2431         iwl_clear_stations_table(priv);
2432
2433         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2434         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2435
2436         if (rfkill & 0x1) {
2437                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2438                 /* if RFKILL is not on, then wait for thermal
2439                  * sensor in adapter to kick in */
2440                 while (iwl3945_hw_get_temperature(priv) == 0) {
2441                         thermal_spin++;
2442                         udelay(10);
2443                 }
2444
2445                 if (thermal_spin)
2446                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2447                                        thermal_spin * 10);
2448         } else
2449                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2450
2451         /* After the ALIVE response, we can send commands to 3945 uCode */
2452         set_bit(STATUS_ALIVE, &priv->status);
2453
2454         if (iwl_is_rfkill(priv))
2455                 return;
2456
2457         ieee80211_wake_queues(priv->hw);
2458
2459         priv->active_rate = priv->rates_mask;
2460         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2461
2462         iwl_power_update_mode(priv, false);
2463
2464         if (iwl_is_associated(priv)) {
2465                 struct iwl3945_rxon_cmd *active_rxon =
2466                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2467
2468                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2469                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2470         } else {
2471                 /* Initialize our rx_config data */
2472                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2473         }
2474
2475         /* Configure Bluetooth device coexistence support */
2476         iwl_send_bt_config(priv);
2477
2478         /* Configure the adapter for unassociated operation */
2479         iwlcore_commit_rxon(priv);
2480
2481         iwl3945_reg_txpower_periodic(priv);
2482
2483         iwl_leds_init(priv);
2484
2485         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2486         set_bit(STATUS_READY, &priv->status);
2487         wake_up_interruptible(&priv->wait_command_queue);
2488
2489         /* reassociate for ADHOC mode */
2490         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2491                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2492                                                                 priv->vif);
2493                 if (beacon)
2494                         iwl_mac_beacon_update(priv->hw, beacon);
2495         }
2496
2497         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2498                 iwl_set_mode(priv, priv->iw_mode);
2499
2500         return;
2501
2502  restart:
2503         queue_work(priv->workqueue, &priv->restart);
2504 }
2505
2506 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2507
2508 static void __iwl3945_down(struct iwl_priv *priv)
2509 {
2510         unsigned long flags;
2511         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2512         struct ieee80211_conf *conf = NULL;
2513
2514         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2515
2516         conf = ieee80211_get_hw_conf(priv->hw);
2517
2518         if (!exit_pending)
2519                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2520
2521         iwl_clear_stations_table(priv);
2522
2523         /* Unblock any waiting calls */
2524         wake_up_interruptible_all(&priv->wait_command_queue);
2525
2526         /* Wipe out the EXIT_PENDING status bit if we are not actually
2527          * exiting the module */
2528         if (!exit_pending)
2529                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2530
2531         /* stop and reset the on-board processor */
2532         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2533
2534         /* tell the device to stop sending interrupts */
2535         spin_lock_irqsave(&priv->lock, flags);
2536         iwl_disable_interrupts(priv);
2537         spin_unlock_irqrestore(&priv->lock, flags);
2538         iwl_synchronize_irq(priv);
2539
2540         if (priv->mac80211_registered)
2541                 ieee80211_stop_queues(priv->hw);
2542
2543         /* If we have not previously called iwl3945_init() then
2544          * clear all bits but the RF Kill bits and return */
2545         if (!iwl_is_init(priv)) {
2546                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2547                                         STATUS_RF_KILL_HW |
2548                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2549                                         STATUS_GEO_CONFIGURED |
2550                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2551                                         STATUS_EXIT_PENDING;
2552                 goto exit;
2553         }
2554
2555         /* ...otherwise clear out all the status bits but the RF Kill
2556          * bit and continue taking the NIC down. */
2557         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2558                                 STATUS_RF_KILL_HW |
2559                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2560                                 STATUS_GEO_CONFIGURED |
2561                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2562                                 STATUS_FW_ERROR |
2563                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2564                                 STATUS_EXIT_PENDING;
2565
2566         priv->cfg->ops->lib->apm_ops.reset(priv);
2567         spin_lock_irqsave(&priv->lock, flags);
2568         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2569         spin_unlock_irqrestore(&priv->lock, flags);
2570
2571         iwl3945_hw_txq_ctx_stop(priv);
2572         iwl3945_hw_rxq_stop(priv);
2573
2574         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2575                                 APMG_CLK_VAL_DMA_CLK_RQT);
2576
2577         udelay(5);
2578
2579         if (exit_pending)
2580                 priv->cfg->ops->lib->apm_ops.stop(priv);
2581         else
2582                 priv->cfg->ops->lib->apm_ops.reset(priv);
2583
2584  exit:
2585         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2586
2587         if (priv->ibss_beacon)
2588                 dev_kfree_skb(priv->ibss_beacon);
2589         priv->ibss_beacon = NULL;
2590
2591         /* clear out any free frames */
2592         iwl3945_clear_free_frames(priv);
2593 }
2594
2595 static void iwl3945_down(struct iwl_priv *priv)
2596 {
2597         mutex_lock(&priv->mutex);
2598         __iwl3945_down(priv);
2599         mutex_unlock(&priv->mutex);
2600
2601         iwl3945_cancel_deferred_work(priv);
2602 }
2603
2604 #define MAX_HW_RESTARTS 5
2605
2606 static int __iwl3945_up(struct iwl_priv *priv)
2607 {
2608         int rc, i;
2609
2610         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2611                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2612                 return -EIO;
2613         }
2614
2615         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2616                 IWL_ERR(priv, "ucode not available for device bring up\n");
2617                 return -EIO;
2618         }
2619
2620         /* If platform's RF_KILL switch is NOT set to KILL */
2621         if (iwl_read32(priv, CSR_GP_CNTRL) &
2622                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2623                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2624         else {
2625                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2626                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2627                 return -ENODEV;
2628         }
2629
2630         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2631
2632         rc = iwl3945_hw_nic_init(priv);
2633         if (rc) {
2634                 IWL_ERR(priv, "Unable to int nic\n");
2635                 return rc;
2636         }
2637
2638         /* make sure rfkill handshake bits are cleared */
2639         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2640         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2641                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2642
2643         /* clear (again), then enable host interrupts */
2644         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2645         iwl_enable_interrupts(priv);
2646
2647         /* really make sure rfkill handshake bits are cleared */
2648         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2649         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2650
2651         /* Copy original ucode data image from disk into backup cache.
2652          * This will be used to initialize the on-board processor's
2653          * data SRAM for a clean start when the runtime program first loads. */
2654         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2655                priv->ucode_data.len);
2656
2657         /* We return success when we resume from suspend and rf_kill is on. */
2658         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2659                 return 0;
2660
2661         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2662
2663                 iwl_clear_stations_table(priv);
2664
2665                 /* load bootstrap state machine,
2666                  * load bootstrap program into processor's memory,
2667                  * prepare to load the "initialize" uCode */
2668                 priv->cfg->ops->lib->load_ucode(priv);
2669
2670                 if (rc) {
2671                         IWL_ERR(priv,
2672                                 "Unable to set up bootstrap uCode: %d\n", rc);
2673                         continue;
2674                 }
2675
2676                 /* start card; "initialize" will load runtime ucode */
2677                 iwl3945_nic_start(priv);
2678
2679                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2680
2681                 return 0;
2682         }
2683
2684         set_bit(STATUS_EXIT_PENDING, &priv->status);
2685         __iwl3945_down(priv);
2686         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2687
2688         /* tried to restart and config the device for as long as our
2689          * patience could withstand */
2690         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2691         return -EIO;
2692 }
2693
2694
2695 /*****************************************************************************
2696  *
2697  * Workqueue callbacks
2698  *
2699  *****************************************************************************/
2700
2701 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2702 {
2703         struct iwl_priv *priv =
2704             container_of(data, struct iwl_priv, init_alive_start.work);
2705
2706         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2707                 return;
2708
2709         mutex_lock(&priv->mutex);
2710         iwl3945_init_alive_start(priv);
2711         mutex_unlock(&priv->mutex);
2712 }
2713
2714 static void iwl3945_bg_alive_start(struct work_struct *data)
2715 {
2716         struct iwl_priv *priv =
2717             container_of(data, struct iwl_priv, alive_start.work);
2718
2719         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2720                 return;
2721
2722         mutex_lock(&priv->mutex);
2723         iwl3945_alive_start(priv);
2724         mutex_unlock(&priv->mutex);
2725 }
2726
2727 static void iwl3945_rfkill_poll(struct work_struct *data)
2728 {
2729         struct iwl_priv *priv =
2730             container_of(data, struct iwl_priv, rfkill_poll.work);
2731
2732         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2733                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2734         else
2735                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2736
2737         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2738                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2739
2740         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2741                            round_jiffies_relative(2 * HZ));
2742
2743 }
2744
2745 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2746 static void iwl3945_bg_request_scan(struct work_struct *data)
2747 {
2748         struct iwl_priv *priv =
2749             container_of(data, struct iwl_priv, request_scan);
2750         struct iwl_host_cmd cmd = {
2751                 .id = REPLY_SCAN_CMD,
2752                 .len = sizeof(struct iwl3945_scan_cmd),
2753                 .flags = CMD_SIZE_HUGE,
2754         };
2755         int rc = 0;
2756         struct iwl3945_scan_cmd *scan;
2757         struct ieee80211_conf *conf = NULL;
2758         u8 n_probes = 0;
2759         enum ieee80211_band band;
2760         bool is_active = false;
2761
2762         conf = ieee80211_get_hw_conf(priv->hw);
2763
2764         mutex_lock(&priv->mutex);
2765
2766         cancel_delayed_work(&priv->scan_check);
2767
2768         if (!iwl_is_ready(priv)) {
2769                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2770                 goto done;
2771         }
2772
2773         /* Make sure the scan wasn't canceled before this queued work
2774          * was given the chance to run... */
2775         if (!test_bit(STATUS_SCANNING, &priv->status))
2776                 goto done;
2777
2778         /* This should never be called or scheduled if there is currently
2779          * a scan active in the hardware. */
2780         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2781                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2782                                 "Ignoring second request.\n");
2783                 rc = -EIO;
2784                 goto done;
2785         }
2786
2787         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2788                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2789                 goto done;
2790         }
2791
2792         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2793                 IWL_DEBUG_HC(priv,
2794                         "Scan request while abort pending. Queuing.\n");
2795                 goto done;
2796         }
2797
2798         if (iwl_is_rfkill(priv)) {
2799                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2800                 goto done;
2801         }
2802
2803         if (!test_bit(STATUS_READY, &priv->status)) {
2804                 IWL_DEBUG_HC(priv,
2805                         "Scan request while uninitialized. Queuing.\n");
2806                 goto done;
2807         }
2808
2809         if (!priv->scan_bands) {
2810                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2811                 goto done;
2812         }
2813
2814         if (!priv->scan) {
2815                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2816                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2817                 if (!priv->scan) {
2818                         rc = -ENOMEM;
2819                         goto done;
2820                 }
2821         }
2822         scan = priv->scan;
2823         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2824
2825         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2826         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2827
2828         if (iwl_is_associated(priv)) {
2829                 u16 interval = 0;
2830                 u32 extra;
2831                 u32 suspend_time = 100;
2832                 u32 scan_suspend_time = 100;
2833                 unsigned long flags;
2834
2835                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2836
2837                 spin_lock_irqsave(&priv->lock, flags);
2838                 interval = priv->beacon_int;
2839                 spin_unlock_irqrestore(&priv->lock, flags);
2840
2841                 scan->suspend_time = 0;
2842                 scan->max_out_time = cpu_to_le32(200 * 1024);
2843                 if (!interval)
2844                         interval = suspend_time;
2845                 /*
2846                  * suspend time format:
2847                  *  0-19: beacon interval in usec (time before exec.)
2848                  * 20-23: 0
2849                  * 24-31: number of beacons (suspend between channels)
2850                  */
2851
2852                 extra = (suspend_time / interval) << 24;
2853                 scan_suspend_time = 0xFF0FFFFF &
2854                     (extra | ((suspend_time % interval) * 1024));
2855
2856                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2857                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2858                                scan_suspend_time, interval);
2859         }
2860
2861         if (priv->scan_request->n_ssids) {
2862                 int i, p = 0;
2863                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2864                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2865                         /* always does wildcard anyway */
2866                         if (!priv->scan_request->ssids[i].ssid_len)
2867                                 continue;
2868                         scan->direct_scan[p].id = WLAN_EID_SSID;
2869                         scan->direct_scan[p].len =
2870                                 priv->scan_request->ssids[i].ssid_len;
2871                         memcpy(scan->direct_scan[p].ssid,
2872                                priv->scan_request->ssids[i].ssid,
2873                                priv->scan_request->ssids[i].ssid_len);
2874                         n_probes++;
2875                         p++;
2876                 }
2877                 is_active = true;
2878         } else
2879                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2880
2881         /* We don't build a direct scan probe request; the uCode will do
2882          * that based on the direct_mask added to each channel entry */
2883         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2884         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2885         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2886
2887         /* flags + rate selection */
2888
2889         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2890                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2891                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2892                 scan->good_CRC_th = 0;
2893                 band = IEEE80211_BAND_2GHZ;
2894         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2895                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2896                 /*
2897                  * If active scaning is requested but a certain channel
2898                  * is marked passive, we can do active scanning if we
2899                  * detect transmissions.
2900                  */
2901                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2902                 band = IEEE80211_BAND_5GHZ;
2903         } else {
2904                 IWL_WARN(priv, "Invalid scan band count\n");
2905                 goto done;
2906         }
2907
2908         scan->tx_cmd.len = cpu_to_le16(
2909                         iwl_fill_probe_req(priv,
2910                                 (struct ieee80211_mgmt *)scan->data,
2911                                 priv->scan_request->ie,
2912                                 priv->scan_request->ie_len,
2913                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2914
2915         /* select Rx antennas */
2916         scan->flags |= iwl3945_get_antenna_flags(priv);
2917
2918         if (iwl_is_monitor_mode(priv))
2919                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2920
2921         scan->channel_count =
2922                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2923                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2924
2925         if (scan->channel_count == 0) {
2926                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2927                 goto done;
2928         }
2929
2930         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2931             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2932         cmd.data = scan;
2933         scan->len = cpu_to_le16(cmd.len);
2934
2935         set_bit(STATUS_SCAN_HW, &priv->status);
2936         rc = iwl_send_cmd_sync(priv, &cmd);
2937         if (rc)
2938                 goto done;
2939
2940         queue_delayed_work(priv->workqueue, &priv->scan_check,
2941                            IWL_SCAN_CHECK_WATCHDOG);
2942
2943         mutex_unlock(&priv->mutex);
2944         return;
2945
2946  done:
2947         /* can not perform scan make sure we clear scanning
2948          * bits from status so next scan request can be performed.
2949          * if we dont clear scanning status bit here all next scan
2950          * will fail
2951         */
2952         clear_bit(STATUS_SCAN_HW, &priv->status);
2953         clear_bit(STATUS_SCANNING, &priv->status);
2954
2955         /* inform mac80211 scan aborted */
2956         queue_work(priv->workqueue, &priv->scan_completed);
2957         mutex_unlock(&priv->mutex);
2958 }
2959
2960 static void iwl3945_bg_up(struct work_struct *data)
2961 {
2962         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2963
2964         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2965                 return;
2966
2967         mutex_lock(&priv->mutex);
2968         __iwl3945_up(priv);
2969         mutex_unlock(&priv->mutex);
2970 }
2971
2972 static void iwl3945_bg_restart(struct work_struct *data)
2973 {
2974         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2975
2976         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2977                 return;
2978
2979         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2980                 mutex_lock(&priv->mutex);
2981                 priv->vif = NULL;
2982                 priv->is_open = 0;
2983                 mutex_unlock(&priv->mutex);
2984                 iwl3945_down(priv);
2985                 ieee80211_restart_hw(priv->hw);
2986         } else {
2987                 iwl3945_down(priv);
2988                 queue_work(priv->workqueue, &priv->up);
2989         }
2990 }
2991
2992 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2993 {
2994         struct iwl_priv *priv =
2995             container_of(data, struct iwl_priv, rx_replenish);
2996
2997         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2998                 return;
2999
3000         mutex_lock(&priv->mutex);
3001         iwl3945_rx_replenish(priv);
3002         mutex_unlock(&priv->mutex);
3003 }
3004
3005 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3006
3007 void iwl3945_post_associate(struct iwl_priv *priv)
3008 {
3009         int rc = 0;
3010         struct ieee80211_conf *conf = NULL;
3011
3012         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3013                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3014                 return;
3015         }
3016
3017
3018         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3019                         priv->assoc_id, priv->active_rxon.bssid_addr);
3020
3021         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3022                 return;
3023
3024         if (!priv->vif || !priv->is_open)
3025                 return;
3026
3027         iwl_scan_cancel_timeout(priv, 200);
3028
3029         conf = ieee80211_get_hw_conf(priv->hw);
3030
3031         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3032         iwlcore_commit_rxon(priv);
3033
3034         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3035         iwl_setup_rxon_timing(priv);
3036         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3037                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3038         if (rc)
3039                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3040                             "Attempting to continue.\n");
3041
3042         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3043
3044         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3045
3046         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3047                         priv->assoc_id, priv->beacon_int);
3048
3049         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3050                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3051         else
3052                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3053
3054         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3055                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3056                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3057                 else
3058                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3059
3060                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3061                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3062
3063         }
3064
3065         iwlcore_commit_rxon(priv);
3066
3067         switch (priv->iw_mode) {
3068         case NL80211_IFTYPE_STATION:
3069                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3070                 break;
3071
3072         case NL80211_IFTYPE_ADHOC:
3073
3074                 priv->assoc_id = 1;
3075                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3076                 iwl3945_sync_sta(priv, IWL_STA_ID,
3077                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3078                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3079                                  CMD_ASYNC);
3080                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3081                 iwl3945_send_beacon_cmd(priv);
3082
3083                 break;
3084
3085         default:
3086                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3087                            __func__, priv->iw_mode);
3088                 break;
3089         }
3090
3091         iwl_activate_qos(priv, 0);
3092
3093         /* we have just associated, don't start scan too early */
3094         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3095 }
3096
3097 /*****************************************************************************
3098  *
3099  * mac80211 entry point functions
3100  *
3101  *****************************************************************************/
3102
3103 #define UCODE_READY_TIMEOUT     (2 * HZ)
3104
3105 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3106 {
3107         struct iwl_priv *priv = hw->priv;
3108         int ret;
3109
3110         IWL_DEBUG_MAC80211(priv, "enter\n");
3111
3112         /* we should be verifying the device is ready to be opened */
3113         mutex_lock(&priv->mutex);
3114
3115         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3116          * ucode filename and max sizes are card-specific. */
3117
3118         if (!priv->ucode_code.len) {
3119                 ret = iwl3945_read_ucode(priv);
3120                 if (ret) {
3121                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3122                         mutex_unlock(&priv->mutex);
3123                         goto out_release_irq;
3124                 }
3125         }
3126
3127         ret = __iwl3945_up(priv);
3128
3129         mutex_unlock(&priv->mutex);
3130
3131         if (ret)
3132                 goto out_release_irq;
3133
3134         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3135
3136         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3137          * mac80211 will not be run successfully. */
3138         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3139                         test_bit(STATUS_READY, &priv->status),
3140                         UCODE_READY_TIMEOUT);
3141         if (!ret) {
3142                 if (!test_bit(STATUS_READY, &priv->status)) {
3143                         IWL_ERR(priv,
3144                                 "Wait for START_ALIVE timeout after %dms.\n",
3145                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3146                         ret = -ETIMEDOUT;
3147                         goto out_release_irq;
3148                 }
3149         }
3150
3151         /* ucode is running and will send rfkill notifications,
3152          * no need to poll the killswitch state anymore */
3153         cancel_delayed_work(&priv->rfkill_poll);
3154
3155         iwl_led_start(priv);
3156
3157         priv->is_open = 1;
3158         IWL_DEBUG_MAC80211(priv, "leave\n");
3159         return 0;
3160
3161 out_release_irq:
3162         priv->is_open = 0;
3163         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3164         return ret;
3165 }
3166
3167 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3168 {
3169         struct iwl_priv *priv = hw->priv;
3170
3171         IWL_DEBUG_MAC80211(priv, "enter\n");
3172
3173         if (!priv->is_open) {
3174                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3175                 return;
3176         }
3177
3178         priv->is_open = 0;
3179
3180         if (iwl_is_ready_rf(priv)) {
3181                 /* stop mac, cancel any scan request and clear
3182                  * RXON_FILTER_ASSOC_MSK BIT
3183                  */
3184                 mutex_lock(&priv->mutex);
3185                 iwl_scan_cancel_timeout(priv, 100);
3186                 mutex_unlock(&priv->mutex);
3187         }
3188
3189         iwl3945_down(priv);
3190
3191         flush_workqueue(priv->workqueue);
3192
3193         /* start polling the killswitch state again */
3194         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3195                            round_jiffies_relative(2 * HZ));
3196
3197         IWL_DEBUG_MAC80211(priv, "leave\n");
3198 }
3199
3200 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3201 {
3202         struct iwl_priv *priv = hw->priv;
3203
3204         IWL_DEBUG_MAC80211(priv, "enter\n");
3205
3206         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3207                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3208
3209         if (iwl3945_tx_skb(priv, skb))
3210                 dev_kfree_skb_any(skb);
3211
3212         IWL_DEBUG_MAC80211(priv, "leave\n");
3213         return NETDEV_TX_OK;
3214 }
3215
3216 void iwl3945_config_ap(struct iwl_priv *priv)
3217 {
3218         int rc = 0;
3219
3220         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3221                 return;
3222
3223         /* The following should be done only at AP bring up */
3224         if (!(iwl_is_associated(priv))) {
3225
3226                 /* RXON - unassoc (to set timing command) */
3227                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3228                 iwlcore_commit_rxon(priv);
3229
3230                 /* RXON Timing */
3231                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3232                 iwl_setup_rxon_timing(priv);
3233                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3234                                       sizeof(priv->rxon_timing),
3235                                       &priv->rxon_timing);
3236                 if (rc)
3237                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3238                                         "Attempting to continue.\n");
3239
3240                 /* FIXME: what should be the assoc_id for AP? */
3241                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3242                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3243                         priv->staging_rxon.flags |=
3244                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3245                 else
3246                         priv->staging_rxon.flags &=
3247                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3248
3249                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3250                         if (priv->assoc_capability &
3251                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3252                                 priv->staging_rxon.flags |=
3253                                         RXON_FLG_SHORT_SLOT_MSK;
3254                         else
3255                                 priv->staging_rxon.flags &=
3256                                         ~RXON_FLG_SHORT_SLOT_MSK;
3257
3258                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3259                                 priv->staging_rxon.flags &=
3260                                         ~RXON_FLG_SHORT_SLOT_MSK;
3261                 }
3262                 /* restore RXON assoc */
3263                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3264                 iwlcore_commit_rxon(priv);
3265                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3266         }
3267         iwl3945_send_beacon_cmd(priv);
3268
3269         /* FIXME - we need to add code here to detect a totally new
3270          * configuration, reset the AP, unassoc, rxon timing, assoc,
3271          * clear sta table, add BCAST sta... */
3272 }
3273
3274 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3275                                struct ieee80211_vif *vif,
3276                                struct ieee80211_sta *sta,
3277                                struct ieee80211_key_conf *key)
3278 {
3279         struct iwl_priv *priv = hw->priv;
3280         const u8 *addr;
3281         int ret = 0;
3282         u8 sta_id = IWL_INVALID_STATION;
3283         u8 static_key;
3284
3285         IWL_DEBUG_MAC80211(priv, "enter\n");
3286
3287         if (iwl3945_mod_params.sw_crypto) {
3288                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3289                 return -EOPNOTSUPP;
3290         }
3291
3292         addr = sta ? sta->addr : iwl_bcast_addr;
3293         static_key = !iwl_is_associated(priv);
3294
3295         if (!static_key) {
3296                 sta_id = iwl_find_station(priv, addr);
3297                 if (sta_id == IWL_INVALID_STATION) {
3298                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3299                                             addr);
3300                         return -EINVAL;
3301                 }
3302         }
3303
3304         mutex_lock(&priv->mutex);
3305         iwl_scan_cancel_timeout(priv, 100);
3306         mutex_unlock(&priv->mutex);
3307
3308         switch (cmd) {
3309         case SET_KEY:
3310                 if (static_key)
3311                         ret = iwl3945_set_static_key(priv, key);
3312                 else
3313                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3314                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3315                 break;
3316         case DISABLE_KEY:
3317                 if (static_key)
3318                         ret = iwl3945_remove_static_key(priv);
3319                 else
3320                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3321                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3322                 break;
3323         default:
3324                 ret = -EINVAL;
3325         }
3326
3327         IWL_DEBUG_MAC80211(priv, "leave\n");
3328
3329         return ret;
3330 }
3331
3332 /*****************************************************************************
3333  *
3334  * sysfs attributes
3335  *
3336  *****************************************************************************/
3337
3338 #ifdef CONFIG_IWLWIFI_DEBUG
3339
3340 /*
3341  * The following adds a new attribute to the sysfs representation
3342  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3343  * used for controlling the debug level.
3344  *
3345  * See the level definitions in iwl for details.
3346  *
3347  * The debug_level being managed using sysfs below is a per device debug
3348  * level that is used instead of the global debug level if it (the per
3349  * device debug level) is set.
3350  */
3351 static ssize_t show_debug_level(struct device *d,
3352                                 struct device_attribute *attr, char *buf)
3353 {
3354         struct iwl_priv *priv = dev_get_drvdata(d);
3355         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3356 }
3357 static ssize_t store_debug_level(struct device *d,
3358                                 struct device_attribute *attr,
3359                                  const char *buf, size_t count)
3360 {
3361         struct iwl_priv *priv = dev_get_drvdata(d);
3362         unsigned long val;
3363         int ret;
3364
3365         ret = strict_strtoul(buf, 0, &val);
3366         if (ret)
3367                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3368         else {
3369                 priv->debug_level = val;
3370                 if (iwl_alloc_traffic_mem(priv))
3371                         IWL_ERR(priv,
3372                                 "Not enough memory to generate traffic log\n");
3373         }
3374         return strnlen(buf, count);
3375 }
3376
3377 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3378                         show_debug_level, store_debug_level);
3379
3380 #endif /* CONFIG_IWLWIFI_DEBUG */
3381
3382 static ssize_t show_temperature(struct device *d,
3383                                 struct device_attribute *attr, char *buf)
3384 {
3385         struct iwl_priv *priv = dev_get_drvdata(d);
3386
3387         if (!iwl_is_alive(priv))
3388                 return -EAGAIN;
3389
3390         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3391 }
3392
3393 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3394
3395 static ssize_t show_tx_power(struct device *d,
3396                              struct device_attribute *attr, char *buf)
3397 {
3398         struct iwl_priv *priv = dev_get_drvdata(d);
3399         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3400 }
3401
3402 static ssize_t store_tx_power(struct device *d,
3403                               struct device_attribute *attr,
3404                               const char *buf, size_t count)
3405 {
3406         struct iwl_priv *priv = dev_get_drvdata(d);
3407         char *p = (char *)buf;
3408         u32 val;
3409
3410         val = simple_strtoul(p, &p, 10);
3411         if (p == buf)
3412                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3413         else
3414                 iwl3945_hw_reg_set_txpower(priv, val);
3415
3416         return count;
3417 }
3418
3419 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3420
3421 static ssize_t show_flags(struct device *d,
3422                           struct device_attribute *attr, char *buf)
3423 {
3424         struct iwl_priv *priv = dev_get_drvdata(d);
3425
3426         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3427 }
3428
3429 static ssize_t store_flags(struct device *d,
3430                            struct device_attribute *attr,
3431                            const char *buf, size_t count)
3432 {
3433         struct iwl_priv *priv = dev_get_drvdata(d);
3434         u32 flags = simple_strtoul(buf, NULL, 0);
3435
3436         mutex_lock(&priv->mutex);
3437         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3438                 /* Cancel any currently running scans... */
3439                 if (iwl_scan_cancel_timeout(priv, 100))
3440                         IWL_WARN(priv, "Could not cancel scan.\n");
3441                 else {
3442                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3443                                        flags);
3444                         priv->staging_rxon.flags = cpu_to_le32(flags);
3445                         iwlcore_commit_rxon(priv);
3446                 }
3447         }
3448         mutex_unlock(&priv->mutex);
3449
3450         return count;
3451 }
3452
3453 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3454
3455 static ssize_t show_filter_flags(struct device *d,
3456                                  struct device_attribute *attr, char *buf)
3457 {
3458         struct iwl_priv *priv = dev_get_drvdata(d);
3459
3460         return sprintf(buf, "0x%04X\n",
3461                 le32_to_cpu(priv->active_rxon.filter_flags));
3462 }
3463
3464 static ssize_t store_filter_flags(struct device *d,
3465                                   struct device_attribute *attr,
3466                                   const char *buf, size_t count)
3467 {
3468         struct iwl_priv *priv = dev_get_drvdata(d);
3469         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3470
3471         mutex_lock(&priv->mutex);
3472         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3473                 /* Cancel any currently running scans... */
3474                 if (iwl_scan_cancel_timeout(priv, 100))
3475                         IWL_WARN(priv, "Could not cancel scan.\n");
3476                 else {
3477                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3478                                        "0x%04X\n", filter_flags);
3479                         priv->staging_rxon.filter_flags =
3480                                 cpu_to_le32(filter_flags);
3481                         iwlcore_commit_rxon(priv);
3482                 }
3483         }
3484         mutex_unlock(&priv->mutex);
3485
3486         return count;
3487 }
3488
3489 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3490                    store_filter_flags);
3491
3492 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3493
3494 static ssize_t show_measurement(struct device *d,
3495                                 struct device_attribute *attr, char *buf)
3496 {
3497         struct iwl_priv *priv = dev_get_drvdata(d);
3498         struct iwl_spectrum_notification measure_report;
3499         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3500         u8 *data = (u8 *)&measure_report;
3501         unsigned long flags;
3502
3503         spin_lock_irqsave(&priv->lock, flags);
3504         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3505                 spin_unlock_irqrestore(&priv->lock, flags);
3506                 return 0;
3507         }
3508         memcpy(&measure_report, &priv->measure_report, size);
3509         priv->measurement_status = 0;
3510         spin_unlock_irqrestore(&priv->lock, flags);
3511
3512         while (size && (PAGE_SIZE - len)) {
3513                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3514                                    PAGE_SIZE - len, 1);
3515                 len = strlen(buf);
3516                 if (PAGE_SIZE - len)
3517                         buf[len++] = '\n';
3518
3519                 ofs += 16;
3520                 size -= min(size, 16U);
3521         }
3522
3523         return len;
3524 }
3525
3526 static ssize_t store_measurement(struct device *d,
3527                                  struct device_attribute *attr,
3528                                  const char *buf, size_t count)
3529 {
3530         struct iwl_priv *priv = dev_get_drvdata(d);
3531         struct ieee80211_measurement_params params = {
3532                 .channel = le16_to_cpu(priv->active_rxon.channel),
3533                 .start_time = cpu_to_le64(priv->last_tsf),
3534                 .duration = cpu_to_le16(1),
3535         };
3536         u8 type = IWL_MEASURE_BASIC;
3537         u8 buffer[32];
3538         u8 channel;
3539
3540         if (count) {
3541                 char *p = buffer;
3542                 strncpy(buffer, buf, min(sizeof(buffer), count));
3543                 channel = simple_strtoul(p, NULL, 0);
3544                 if (channel)
3545                         params.channel = channel;
3546
3547                 p = buffer;
3548                 while (*p && *p != ' ')
3549                         p++;
3550                 if (*p)
3551                         type = simple_strtoul(p + 1, NULL, 0);
3552         }
3553
3554         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3555                        "channel %d (for '%s')\n", type, params.channel, buf);
3556         iwl3945_get_measurement(priv, &params, type);
3557
3558         return count;
3559 }
3560
3561 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3562                    show_measurement, store_measurement);
3563 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3564
3565 static ssize_t store_retry_rate(struct device *d,
3566                                 struct device_attribute *attr,
3567                                 const char *buf, size_t count)
3568 {
3569         struct iwl_priv *priv = dev_get_drvdata(d);
3570
3571         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3572         if (priv->retry_rate <= 0)
3573                 priv->retry_rate = 1;
3574
3575         return count;
3576 }
3577
3578 static ssize_t show_retry_rate(struct device *d,
3579                                struct device_attribute *attr, char *buf)
3580 {
3581         struct iwl_priv *priv = dev_get_drvdata(d);
3582         return sprintf(buf, "%d", priv->retry_rate);
3583 }
3584
3585 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3586                    store_retry_rate);
3587
3588
3589 static ssize_t show_channels(struct device *d,
3590                              struct device_attribute *attr, char *buf)
3591 {
3592         /* all this shit doesn't belong into sysfs anyway */
3593         return 0;
3594 }
3595
3596 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3597
3598 static ssize_t show_statistics(struct device *d,
3599                                struct device_attribute *attr, char *buf)
3600 {
3601         struct iwl_priv *priv = dev_get_drvdata(d);
3602         u32 size = sizeof(struct iwl3945_notif_statistics);
3603         u32 len = 0, ofs = 0;
3604         u8 *data = (u8 *)&priv->statistics_39;
3605         int rc = 0;
3606
3607         if (!iwl_is_alive(priv))
3608                 return -EAGAIN;
3609
3610         mutex_lock(&priv->mutex);
3611         rc = iwl_send_statistics_request(priv, 0);
3612         mutex_unlock(&priv->mutex);
3613
3614         if (rc) {
3615                 len = sprintf(buf,
3616                               "Error sending statistics request: 0x%08X\n", rc);
3617                 return len;
3618         }
3619
3620         while (size && (PAGE_SIZE - len)) {
3621                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3622                                    PAGE_SIZE - len, 1);
3623                 len = strlen(buf);
3624                 if (PAGE_SIZE - len)
3625                         buf[len++] = '\n';
3626
3627                 ofs += 16;
3628                 size -= min(size, 16U);
3629         }
3630
3631         return len;
3632 }
3633
3634 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3635
3636 static ssize_t show_antenna(struct device *d,
3637                             struct device_attribute *attr, char *buf)
3638 {
3639         struct iwl_priv *priv = dev_get_drvdata(d);
3640
3641         if (!iwl_is_alive(priv))
3642                 return -EAGAIN;
3643
3644         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3645 }
3646
3647 static ssize_t store_antenna(struct device *d,
3648                              struct device_attribute *attr,
3649                              const char *buf, size_t count)
3650 {
3651         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3652         int ant;
3653
3654         if (count == 0)
3655                 return 0;
3656
3657         if (sscanf(buf, "%1i", &ant) != 1) {
3658                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3659                 return count;
3660         }
3661
3662         if ((ant >= 0) && (ant <= 2)) {
3663                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3664                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3665         } else
3666                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3667
3668
3669         return count;
3670 }
3671
3672 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3673
3674 static ssize_t show_status(struct device *d,
3675                            struct device_attribute *attr, char *buf)
3676 {
3677         struct iwl_priv *priv = dev_get_drvdata(d);
3678         if (!iwl_is_alive(priv))
3679                 return -EAGAIN;
3680         return sprintf(buf, "0x%08x\n", (int)priv->status);
3681 }
3682
3683 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3684
3685 static ssize_t dump_error_log(struct device *d,
3686                               struct device_attribute *attr,
3687                               const char *buf, size_t count)
3688 {
3689         struct iwl_priv *priv = dev_get_drvdata(d);
3690         char *p = (char *)buf;
3691
3692         if (p[0] == '1')
3693                 iwl3945_dump_nic_error_log(priv);
3694
3695         return strnlen(buf, count);
3696 }
3697
3698 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3699
3700 /*****************************************************************************
3701  *
3702  * driver setup and tear down
3703  *
3704  *****************************************************************************/
3705
3706 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3707 {
3708         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3709
3710         init_waitqueue_head(&priv->wait_command_queue);
3711
3712         INIT_WORK(&priv->up, iwl3945_bg_up);
3713         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3714         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3715         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3716         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3717         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3718         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3719         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3720         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3721         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3722         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3723
3724         iwl3945_hw_setup_deferred_work(priv);
3725
3726         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3727                      iwl3945_irq_tasklet, (unsigned long)priv);
3728 }
3729
3730 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3731 {
3732         iwl3945_hw_cancel_deferred_work(priv);
3733
3734         cancel_delayed_work_sync(&priv->init_alive_start);
3735         cancel_delayed_work(&priv->scan_check);
3736         cancel_delayed_work(&priv->alive_start);
3737         cancel_work_sync(&priv->beacon_update);
3738 }
3739
3740 static struct attribute *iwl3945_sysfs_entries[] = {
3741         &dev_attr_antenna.attr,
3742         &dev_attr_channels.attr,
3743         &dev_attr_dump_errors.attr,
3744         &dev_attr_flags.attr,
3745         &dev_attr_filter_flags.attr,
3746 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3747         &dev_attr_measurement.attr,
3748 #endif
3749         &dev_attr_retry_rate.attr,
3750         &dev_attr_statistics.attr,
3751         &dev_attr_status.attr,
3752         &dev_attr_temperature.attr,
3753         &dev_attr_tx_power.attr,
3754 #ifdef CONFIG_IWLWIFI_DEBUG
3755         &dev_attr_debug_level.attr,
3756 #endif
3757         NULL
3758 };
3759
3760 static struct attribute_group iwl3945_attribute_group = {
3761         .name = NULL,           /* put in device directory */
3762         .attrs = iwl3945_sysfs_entries,
3763 };
3764
3765 static struct ieee80211_ops iwl3945_hw_ops = {
3766         .tx = iwl3945_mac_tx,
3767         .start = iwl3945_mac_start,
3768         .stop = iwl3945_mac_stop,
3769         .add_interface = iwl_mac_add_interface,
3770         .remove_interface = iwl_mac_remove_interface,
3771         .config = iwl_mac_config,
3772         .configure_filter = iwl_configure_filter,
3773         .set_key = iwl3945_mac_set_key,
3774         .get_tx_stats = iwl_mac_get_tx_stats,
3775         .conf_tx = iwl_mac_conf_tx,
3776         .reset_tsf = iwl_mac_reset_tsf,
3777         .bss_info_changed = iwl_bss_info_changed,
3778         .hw_scan = iwl_mac_hw_scan
3779 };
3780
3781 static int iwl3945_init_drv(struct iwl_priv *priv)
3782 {
3783         int ret;
3784         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3785
3786         priv->retry_rate = 1;
3787         priv->ibss_beacon = NULL;
3788
3789         spin_lock_init(&priv->lock);
3790         spin_lock_init(&priv->sta_lock);
3791         spin_lock_init(&priv->hcmd_lock);
3792
3793         INIT_LIST_HEAD(&priv->free_frames);
3794
3795         mutex_init(&priv->mutex);
3796
3797         /* Clear the driver's (not device's) station table */
3798         iwl_clear_stations_table(priv);
3799
3800         priv->data_retry_limit = -1;
3801         priv->ieee_channels = NULL;
3802         priv->ieee_rates = NULL;
3803         priv->band = IEEE80211_BAND_2GHZ;
3804
3805         priv->iw_mode = NL80211_IFTYPE_STATION;
3806
3807         iwl_reset_qos(priv);
3808
3809         priv->qos_data.qos_active = 0;
3810         priv->qos_data.qos_cap.val = 0;
3811
3812         priv->rates_mask = IWL_RATES_MASK;
3813         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3814
3815         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3816                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3817                          eeprom->version);
3818                 ret = -EINVAL;
3819                 goto err;
3820         }
3821         ret = iwl_init_channel_map(priv);
3822         if (ret) {
3823                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3824                 goto err;
3825         }
3826
3827         /* Set up txpower settings in driver for all channels */
3828         if (iwl3945_txpower_set_from_eeprom(priv)) {
3829                 ret = -EIO;
3830                 goto err_free_channel_map;
3831         }
3832
3833         ret = iwlcore_init_geos(priv);
3834         if (ret) {
3835                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3836                 goto err_free_channel_map;
3837         }
3838         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3839
3840         return 0;
3841
3842 err_free_channel_map:
3843         iwl_free_channel_map(priv);
3844 err:
3845         return ret;
3846 }
3847
3848 static int iwl3945_setup_mac(struct iwl_priv *priv)
3849 {
3850         int ret;
3851         struct ieee80211_hw *hw = priv->hw;
3852
3853         hw->rate_control_algorithm = "iwl-3945-rs";
3854         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3855
3856         /* Tell mac80211 our characteristics */
3857         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3858                     IEEE80211_HW_NOISE_DBM |
3859                     IEEE80211_HW_SPECTRUM_MGMT |
3860                     IEEE80211_HW_SUPPORTS_PS |
3861                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3862
3863         hw->wiphy->interface_modes =
3864                 BIT(NL80211_IFTYPE_STATION) |
3865                 BIT(NL80211_IFTYPE_ADHOC);
3866
3867         hw->wiphy->custom_regulatory = true;
3868
3869         /* Firmware does not support this */
3870         hw->wiphy->disable_beacon_hints = true;
3871
3872         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3873         /* we create the 802.11 header and a zero-length SSID element */
3874         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3875
3876         /* Default value; 4 EDCA QOS priorities */
3877         hw->queues = 4;
3878
3879         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3880                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3881                         &priv->bands[IEEE80211_BAND_2GHZ];
3882
3883         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3884                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3885                         &priv->bands[IEEE80211_BAND_5GHZ];
3886
3887         ret = ieee80211_register_hw(priv->hw);
3888         if (ret) {
3889                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3890                 return ret;
3891         }
3892         priv->mac80211_registered = 1;
3893
3894         return 0;
3895 }
3896
3897 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3898 {
3899         int err = 0;
3900         struct iwl_priv *priv;
3901         struct ieee80211_hw *hw;
3902         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3903         struct iwl3945_eeprom *eeprom;
3904         unsigned long flags;
3905
3906         /***********************
3907          * 1. Allocating HW data
3908          * ********************/
3909
3910         /* mac80211 allocates memory for this device instance, including
3911          *   space for this driver's private structure */
3912         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3913         if (hw == NULL) {
3914                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3915                 err = -ENOMEM;
3916                 goto out;
3917         }
3918         priv = hw->priv;
3919         SET_IEEE80211_DEV(hw, &pdev->dev);
3920
3921         /*
3922          * Disabling hardware scan means that mac80211 will perform scans
3923          * "the hard way", rather than using device's scan.
3924          */
3925         if (iwl3945_mod_params.disable_hw_scan) {
3926                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3927                 iwl3945_hw_ops.hw_scan = NULL;
3928         }
3929
3930
3931         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3932         priv->cfg = cfg;
3933         priv->pci_dev = pdev;
3934         priv->inta_mask = CSR_INI_SET_MASK;
3935
3936 #ifdef CONFIG_IWLWIFI_DEBUG
3937         atomic_set(&priv->restrict_refcnt, 0);
3938 #endif
3939         if (iwl_alloc_traffic_mem(priv))
3940                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3941
3942         /***************************
3943          * 2. Initializing PCI bus
3944          * *************************/
3945         if (pci_enable_device(pdev)) {
3946                 err = -ENODEV;
3947                 goto out_ieee80211_free_hw;
3948         }
3949
3950         pci_set_master(pdev);
3951
3952         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3953         if (!err)
3954                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3955         if (err) {
3956                 IWL_WARN(priv, "No suitable DMA available.\n");
3957                 goto out_pci_disable_device;
3958         }
3959
3960         pci_set_drvdata(pdev, priv);
3961         err = pci_request_regions(pdev, DRV_NAME);
3962         if (err)
3963                 goto out_pci_disable_device;
3964
3965         /***********************
3966          * 3. Read REV Register
3967          * ********************/
3968         priv->hw_base = pci_iomap(pdev, 0, 0);
3969         if (!priv->hw_base) {
3970                 err = -ENODEV;
3971                 goto out_pci_release_regions;
3972         }
3973
3974         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3975                         (unsigned long long) pci_resource_len(pdev, 0));
3976         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3977
3978         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3979          * PCI Tx retries from interfering with C3 CPU state */
3980         pci_write_config_byte(pdev, 0x41, 0x00);
3981
3982         /* this spin lock will be used in apm_ops.init and EEPROM access
3983          * we should init now
3984          */
3985         spin_lock_init(&priv->reg_lock);
3986
3987         /* amp init */
3988         err = priv->cfg->ops->lib->apm_ops.init(priv);
3989         if (err < 0) {
3990                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
3991                 goto out_iounmap;
3992         }
3993
3994         /***********************
3995          * 4. Read EEPROM
3996          * ********************/
3997
3998         /* Read the EEPROM */
3999         err = iwl_eeprom_init(priv);
4000         if (err) {
4001                 IWL_ERR(priv, "Unable to init EEPROM\n");
4002                 goto out_iounmap;
4003         }
4004         /* MAC Address location in EEPROM same for 3945/4965 */
4005         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4006         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4007         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4008         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4009
4010         /***********************
4011          * 5. Setup HW Constants
4012          * ********************/
4013         /* Device-specific setup */
4014         if (iwl3945_hw_set_hw_params(priv)) {
4015                 IWL_ERR(priv, "failed to set hw settings\n");
4016                 goto out_eeprom_free;
4017         }
4018
4019         /***********************
4020          * 6. Setup priv
4021          * ********************/
4022
4023         err = iwl3945_init_drv(priv);
4024         if (err) {
4025                 IWL_ERR(priv, "initializing driver failed\n");
4026                 goto out_unset_hw_params;
4027         }
4028
4029         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4030                 priv->cfg->name);
4031
4032         /***********************
4033          * 7. Setup Services
4034          * ********************/
4035
4036         spin_lock_irqsave(&priv->lock, flags);
4037         iwl_disable_interrupts(priv);
4038         spin_unlock_irqrestore(&priv->lock, flags);
4039
4040         pci_enable_msi(priv->pci_dev);
4041
4042         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4043                           IRQF_SHARED, DRV_NAME, priv);
4044         if (err) {
4045                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4046                 goto out_disable_msi;
4047         }
4048
4049         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4050         if (err) {
4051                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4052                 goto out_release_irq;
4053         }
4054
4055         iwl_set_rxon_channel(priv,
4056                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4057         iwl3945_setup_deferred_work(priv);
4058         iwl3945_setup_rx_handlers(priv);
4059
4060         /*********************************
4061          * 8. Setup and Register mac80211
4062          * *******************************/
4063
4064         iwl_enable_interrupts(priv);
4065
4066         err = iwl3945_setup_mac(priv);
4067         if (err)
4068                 goto  out_remove_sysfs;
4069
4070         err = iwl_dbgfs_register(priv, DRV_NAME);
4071         if (err)
4072                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4073
4074         /* Start monitoring the killswitch */
4075         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4076                            2 * HZ);
4077
4078         return 0;
4079
4080  out_remove_sysfs:
4081         destroy_workqueue(priv->workqueue);
4082         priv->workqueue = NULL;
4083         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4084  out_release_irq:
4085         free_irq(priv->pci_dev->irq, priv);
4086  out_disable_msi:
4087         pci_disable_msi(priv->pci_dev);
4088         iwlcore_free_geos(priv);
4089         iwl_free_channel_map(priv);
4090  out_unset_hw_params:
4091         iwl3945_unset_hw_params(priv);
4092  out_eeprom_free:
4093         iwl_eeprom_free(priv);
4094  out_iounmap:
4095         pci_iounmap(pdev, priv->hw_base);
4096  out_pci_release_regions:
4097         pci_release_regions(pdev);
4098  out_pci_disable_device:
4099         pci_set_drvdata(pdev, NULL);
4100         pci_disable_device(pdev);
4101  out_ieee80211_free_hw:
4102         ieee80211_free_hw(priv->hw);
4103         iwl_free_traffic_mem(priv);
4104  out:
4105         return err;
4106 }
4107
4108 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4109 {
4110         struct iwl_priv *priv = pci_get_drvdata(pdev);
4111         unsigned long flags;
4112
4113         if (!priv)
4114                 return;
4115
4116         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4117
4118         iwl_dbgfs_unregister(priv);
4119
4120         set_bit(STATUS_EXIT_PENDING, &priv->status);
4121
4122         if (priv->mac80211_registered) {
4123                 ieee80211_unregister_hw(priv->hw);
4124                 priv->mac80211_registered = 0;
4125         } else {
4126                 iwl3945_down(priv);
4127         }
4128
4129         /* make sure we flush any pending irq or
4130          * tasklet for the driver
4131          */
4132         spin_lock_irqsave(&priv->lock, flags);
4133         iwl_disable_interrupts(priv);
4134         spin_unlock_irqrestore(&priv->lock, flags);
4135
4136         iwl_synchronize_irq(priv);
4137
4138         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4139
4140         cancel_delayed_work_sync(&priv->rfkill_poll);
4141
4142         iwl3945_dealloc_ucode_pci(priv);
4143
4144         if (priv->rxq.bd)
4145                 iwl3945_rx_queue_free(priv, &priv->rxq);
4146         iwl3945_hw_txq_ctx_free(priv);
4147
4148         iwl3945_unset_hw_params(priv);
4149         iwl_clear_stations_table(priv);
4150
4151         /*netif_stop_queue(dev); */
4152         flush_workqueue(priv->workqueue);
4153
4154         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4155          * priv->workqueue... so we can't take down the workqueue
4156          * until now... */
4157         destroy_workqueue(priv->workqueue);
4158         priv->workqueue = NULL;
4159         iwl_free_traffic_mem(priv);
4160
4161         free_irq(pdev->irq, priv);
4162         pci_disable_msi(pdev);
4163
4164         pci_iounmap(pdev, priv->hw_base);
4165         pci_release_regions(pdev);
4166         pci_disable_device(pdev);
4167         pci_set_drvdata(pdev, NULL);
4168
4169         iwl_free_channel_map(priv);
4170         iwlcore_free_geos(priv);
4171         kfree(priv->scan);
4172         if (priv->ibss_beacon)
4173                 dev_kfree_skb(priv->ibss_beacon);
4174
4175         ieee80211_free_hw(priv->hw);
4176 }
4177
4178
4179 /*****************************************************************************
4180  *
4181  * driver and module entry point
4182  *
4183  *****************************************************************************/
4184
4185 static struct pci_driver iwl3945_driver = {
4186         .name = DRV_NAME,
4187         .id_table = iwl3945_hw_card_ids,
4188         .probe = iwl3945_pci_probe,
4189         .remove = __devexit_p(iwl3945_pci_remove),
4190 #ifdef CONFIG_PM
4191         .suspend = iwl_pci_suspend,
4192         .resume = iwl_pci_resume,
4193 #endif
4194 };
4195
4196 static int __init iwl3945_init(void)
4197 {
4198
4199         int ret;
4200         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4201         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4202
4203         ret = iwl3945_rate_control_register();
4204         if (ret) {
4205                 printk(KERN_ERR DRV_NAME
4206                        "Unable to register rate control algorithm: %d\n", ret);
4207                 return ret;
4208         }
4209
4210         ret = pci_register_driver(&iwl3945_driver);
4211         if (ret) {
4212                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4213                 goto error_register;
4214         }
4215
4216         return ret;
4217
4218 error_register:
4219         iwl3945_rate_control_unregister();
4220         return ret;
4221 }
4222
4223 static void __exit iwl3945_exit(void)
4224 {
4225         pci_unregister_driver(&iwl3945_driver);
4226         iwl3945_rate_control_unregister();
4227 }
4228
4229 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4230
4231 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4232 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4233 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4234 MODULE_PARM_DESC(swcrypto,
4235                  "using software crypto (default 1 [software])\n");
4236 #ifdef CONFIG_IWLWIFI_DEBUG
4237 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4238 MODULE_PARM_DESC(debug, "debug output mask");
4239 #endif
4240 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4241                    int, S_IRUGO);
4242 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4243 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4244 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4245
4246 module_exit(iwl3945_exit);
4247 module_init(iwl3945_init);