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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/ieee80211_radiotap.h>
  44 #include <net/lib80211.h>
  45 #include <net/mac80211.h>
  46
  47 #include <asm/div64.h>
  48
  49 #define DRV_NAME        "iwl3945"
  50
  51 #include "iwl-fh.h"
  52 #include "iwl-3945-fh.h"
  53 #include "iwl-commands.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-3945.h"
  56 #include "iwl-helpers.h"
  57 #include "iwl-core.h"
  58 #include "iwl-dev.h"
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63
  64 #define DRV_DESCRIPTION \
  65 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  66
  67 #ifdef CONFIG_IWLWIFI_DEBUG
  68 #define VD "d"
  69 #else
  70 #define VD
  71 #endif
  72
  73 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
  74 #define VS "s"
  75 #else
  76 #define VS
  77 #endif
  78
  79 #define IWL39_VERSION "1.2.26k" VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82 #define DRV_VERSION     IWL39_VERSION
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  88 MODULE_LICENSE("GPL");
  89
  90  /* module parameters */
  91 struct iwl_mod_params iwl3945_mod_params = {
  92         .num_of_queues = IWL39_NUM_QUEUES, /* Not used */
  93         .sw_crypto = 1,
  94         .restart_fw = 1,
  95         /* the rest are 0 by default */
  96 };
  97
  98 /**
  99  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 100  * @priv: eeprom and antenna fields are used to determine antenna flags
 101  *
 102  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 103  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 104  *
 105  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 106  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 107  * IWL_ANTENNA_AUX       - Force AUX antenna
 108  */
 109 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 110 {
 111         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 112
 113         switch (iwl3945_mod_params.antenna) {
 114         case IWL_ANTENNA_DIVERSITY:
 115                 return 0;
 116
 117         case IWL_ANTENNA_MAIN:
 118                 if (eeprom->antenna_switch_type)
 119                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 120                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 121
 122         case IWL_ANTENNA_AUX:
 123                 if (eeprom->antenna_switch_type)
 124                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 125                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 126         }
 127
 128         /* bad antenna selector value */
 129         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 130                 iwl3945_mod_params.antenna);
 131
 132         return 0;               /* "diversity" is default if error */
 133 }
 134
 135 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 136                                    struct ieee80211_key_conf *keyconf,
 137                                    u8 sta_id)
 138 {
 139         unsigned long flags;
 140         __le16 key_flags = 0;
 141         int ret;
 142
 143         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 144         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 145
 146         if (sta_id == priv->hw_params.bcast_sta_id)
 147                 key_flags |= STA_KEY_MULTICAST_MSK;
 148
 149         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 150         keyconf->hw_key_idx = keyconf->keyidx;
 151         key_flags &= ~STA_KEY_FLG_INVALID;
 152
 153         spin_lock_irqsave(&priv->sta_lock, flags);
 154         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 155         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 156         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 157                keyconf->keylen);
 158
 159         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 160                keyconf->keylen);
 161
 162         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 163                         == STA_KEY_FLG_NO_ENC)
 164                 priv->stations[sta_id].sta.key.key_offset =
 165                                  iwl_get_free_ucode_key_index(priv);
 166         /* else, we are overriding an existing key => no need to allocated room
 167         * in uCode. */
 168
 169         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 170                 "no space for a new key");
 171
 172         priv->stations[sta_id].sta.key.key_flags = key_flags;
 173         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 174         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 175
 176         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 177
 178         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 179
 180         spin_unlock_irqrestore(&priv->sta_lock, flags);
 181
 182         return ret;
 183 }
 184
 185 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 186                                   struct ieee80211_key_conf *keyconf,
 187                                   u8 sta_id)
 188 {
 189         return -EOPNOTSUPP;
 190 }
 191
 192 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 193                                   struct ieee80211_key_conf *keyconf,
 194                                   u8 sta_id)
 195 {
 196         return -EOPNOTSUPP;
 197 }
 198
 199 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 200 {
 201         unsigned long flags;
 202
 203         spin_lock_irqsave(&priv->sta_lock, flags);
 204         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 205         memset(&priv->stations[sta_id].sta.key, 0,
 206                 sizeof(struct iwl4965_keyinfo));
 207         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 208         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 209         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 210         spin_unlock_irqrestore(&priv->sta_lock, flags);
 211
 212         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 213         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 214         return 0;
 215 }
 216
 217 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 218                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 219 {
 220         int ret = 0;
 221
 222         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 223
 224         switch (keyconf->alg) {
 225         case ALG_CCMP:
 226                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 227                 break;
 228         case ALG_TKIP:
 229                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         case ALG_WEP:
 232                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 233                 break;
 234         default:
 235                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 236                 ret = -EINVAL;
 237         }
 238
 239         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 240                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 241                       sta_id, ret);
 242
 243         return ret;
 244 }
 245
 246 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 247 {
 248         int ret = -EOPNOTSUPP;
 249
 250         return ret;
 251 }
 252
 253 static int iwl3945_set_static_key(struct iwl_priv *priv,
 254                                 struct ieee80211_key_conf *key)
 255 {
 256         if (key->alg == ALG_WEP)
 257                 return -EOPNOTSUPP;
 258
 259         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 260         return -EINVAL;
 261 }
 262
 263 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 264 {
 265         struct list_head *element;
 266
 267         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 268                        priv->frames_count);
 269
 270         while (!list_empty(&priv->free_frames)) {
 271                 element = priv->free_frames.next;
 272                 list_del(element);
 273                 kfree(list_entry(element, struct iwl3945_frame, list));
 274                 priv->frames_count--;
 275         }
 276
 277         if (priv->frames_count) {
 278                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 279                             priv->frames_count);
 280                 priv->frames_count = 0;
 281         }
 282 }
 283
 284 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 285 {
 286         struct iwl3945_frame *frame;
 287         struct list_head *element;
 288         if (list_empty(&priv->free_frames)) {
 289                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 290                 if (!frame) {
 291                         IWL_ERR(priv, "Could not allocate frame!\n");
 292                         return NULL;
 293                 }
 294
 295                 priv->frames_count++;
 296                 return frame;
 297         }
 298
 299         element = priv->free_frames.next;
 300         list_del(element);
 301         return list_entry(element, struct iwl3945_frame, list);
 302 }
 303
 304 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 305 {
 306         memset(frame, 0, sizeof(*frame));
 307         list_add(&frame->list, &priv->free_frames);
 308 }
 309
 310 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 311                                 struct ieee80211_hdr *hdr,
 312                                 int left)
 313 {
 314
 315         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 316             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 317              (priv->iw_mode != NL80211_IFTYPE_AP)))
 318                 return 0;
 319
 320         if (priv->ibss_beacon->len > left)
 321                 return 0;
 322
 323         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 324
 325         return priv->ibss_beacon->len;
 326 }
 327
 328 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 329 {
 330         struct iwl3945_frame *frame;
 331         unsigned int frame_size;
 332         int rc;
 333         u8 rate;
 334
 335         frame = iwl3945_get_free_frame(priv);
 336
 337         if (!frame) {
 338                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 339                           "command.\n");
 340                 return -ENOMEM;
 341         }
 342
 343         rate = iwl_rate_get_lowest_plcp(priv);
 344
 345         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 346
 347         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 348                               &frame->u.cmd[0]);
 349
 350         iwl3945_free_frame(priv, frame);
 351
 352         return rc;
 353 }
 354
 355 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 356 {
 357         if (priv->shared_virt)
 358                 pci_free_consistent(priv->pci_dev,
 359                                     sizeof(struct iwl3945_shared),
 360                                     priv->shared_virt,
 361                                     priv->shared_phys);
 362 }
 363
 364 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 365                                       struct ieee80211_tx_info *info,
 366                                       struct iwl_device_cmd *cmd,
 367                                       struct sk_buff *skb_frag,
 368                                       int sta_id)
 369 {
 370         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 371         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 372
 373         switch (keyinfo->alg) {
 374         case ALG_CCMP:
 375                 tx->sec_ctl = TX_CMD_SEC_CCM;
 376                 memcpy(tx->key, keyinfo->key, keyinfo->keylen);
 377                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 378                 break;
 379
 380         case ALG_TKIP:
 381                 break;
 382
 383         case ALG_WEP:
 384                 tx->sec_ctl = TX_CMD_SEC_WEP |
 385                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 386
 387                 if (keyinfo->keylen == 13)
 388                         tx->sec_ctl |= TX_CMD_SEC_KEY128;
 389
 390                 memcpy(&tx->key[3], keyinfo->key, keyinfo->keylen);
 391
 392                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 393                              "with key %d\n", info->control.hw_key->hw_key_idx);
 394                 break;
 395
 396         default:
 397                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 398                 break;
 399         }
 400 }
 401
 402 /*
 403  * handle build REPLY_TX command notification.
 404  */
 405 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 406                                   struct iwl_device_cmd *cmd,
 407                                   struct ieee80211_tx_info *info,
 408                                   struct ieee80211_hdr *hdr, u8 std_id)
 409 {
 410         struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 411         __le32 tx_flags = tx->tx_flags;
 412         __le16 fc = hdr->frame_control;
 413         u8 rc_flags = info->control.rates[0].flags;
 414
 415         tx->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 416         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 417                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 418                 if (ieee80211_is_mgmt(fc))
 419                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 420                 if (ieee80211_is_probe_resp(fc) &&
 421                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 422                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 423         } else {
 424                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 425                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 426         }
 427
 428         tx->sta_id = std_id;
 429         if (ieee80211_has_morefrags(fc))
 430                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 431
 432         if (ieee80211_is_data_qos(fc)) {
 433                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 434                 tx->tid_tspec = qc[0] & 0xf;
 435                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 436         } else {
 437                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 438         }
 439
 440         if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 441                 tx_flags |= TX_CMD_FLG_RTS_MSK;
 442                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 443         } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 444                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 445                 tx_flags |= TX_CMD_FLG_CTS_MSK;
 446         }
 447
 448         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 449                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 450
 451         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 452         if (ieee80211_is_mgmt(fc)) {
 453                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 454                         tx->timeout.pm_frame_timeout = cpu_to_le16(3);
 455                 else
 456                         tx->timeout.pm_frame_timeout = cpu_to_le16(2);
 457         } else {
 458                 tx->timeout.pm_frame_timeout = 0;
 459 #ifdef CONFIG_IWLWIFI_LEDS
 460                 priv->rxtxpackets += le16_to_cpu(cmd->cmd.tx.len);
 461 #endif
 462         }
 463
 464         tx->driver_txop = 0;
 465         tx->tx_flags = tx_flags;
 466         tx->next_frame_len = 0;
 467 }
 468
 469 /*
 470  * start REPLY_TX command process
 471  */
 472 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 473 {
 474         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 475         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 476         struct iwl3945_tx_cmd *tx;
 477         struct iwl_tx_queue *txq = NULL;
 478         struct iwl_queue *q = NULL;
 479         struct iwl_device_cmd *out_cmd;
 480         struct iwl_cmd_meta *out_meta;
 481         dma_addr_t phys_addr;
 482         dma_addr_t txcmd_phys;
 483         int txq_id = skb_get_queue_mapping(skb);
 484         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 485         u8 id;
 486         u8 unicast;
 487         u8 sta_id;
 488         u8 tid = 0;
 489         u16 seq_number = 0;
 490         __le16 fc;
 491         u8 wait_write_ptr = 0;
 492         u8 *qc = NULL;
 493         unsigned long flags;
 494         int rc;
 495
 496         spin_lock_irqsave(&priv->lock, flags);
 497         if (iwl_is_rfkill(priv)) {
 498                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 499                 goto drop_unlock;
 500         }
 501
 502         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 503                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 504                 goto drop_unlock;
 505         }
 506
 507         unicast = !is_multicast_ether_addr(hdr->addr1);
 508         id = 0;
 509
 510         fc = hdr->frame_control;
 511
 512 #ifdef CONFIG_IWLWIFI_DEBUG
 513         if (ieee80211_is_auth(fc))
 514                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 515         else if (ieee80211_is_assoc_req(fc))
 516                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 517         else if (ieee80211_is_reassoc_req(fc))
 518                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 519 #endif
 520
 521         /* drop all non-injected data frame if we are not associated */
 522         if (ieee80211_is_data(fc) &&
 523             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
 524             (!iwl_is_associated(priv) ||
 525              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 526                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 527                 goto drop_unlock;
 528         }
 529
 530         spin_unlock_irqrestore(&priv->lock, flags);
 531
 532         hdr_len = ieee80211_hdrlen(fc);
 533
 534         /* Find (or create) index into station table for destination station */
 535         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 536                 sta_id = priv->hw_params.bcast_sta_id;
 537         else
 538                 sta_id = iwl_get_sta_id(priv, hdr);
 539         if (sta_id == IWL_INVALID_STATION) {
 540                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 541                                hdr->addr1);
 542                 goto drop;
 543         }
 544
 545         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 546
 547         if (ieee80211_is_data_qos(fc)) {
 548                 qc = ieee80211_get_qos_ctl(hdr);
 549                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 550                 if (unlikely(tid >= MAX_TID_COUNT))
 551                         goto drop;
 552                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 553                                 IEEE80211_SCTL_SEQ;
 554                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 555                         (hdr->seq_ctrl &
 556                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 557                 seq_number += 0x10;
 558         }
 559
 560         /* Descriptor for chosen Tx queue */
 561         txq = &priv->txq[txq_id];
 562         q = &txq->q;
 563
 564         spin_lock_irqsave(&priv->lock, flags);
 565
 566         idx = get_cmd_index(q, q->write_ptr, 0);
 567
 568         /* Set up driver data for this TFD */
 569         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 570         txq->txb[q->write_ptr].skb[0] = skb;
 571
 572         /* Init first empty entry in queue's array of Tx/cmd buffers */
 573         out_cmd = txq->cmd[idx];
 574         out_meta = &txq->meta[idx];
 575         tx = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 576         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 577         memset(tx, 0, sizeof(*tx));
 578
 579         /*
 580          * Set up the Tx-command (not MAC!) header.
 581          * Store the chosen Tx queue and TFD index within the sequence field;
 582          * after Tx, uCode's Tx response will return this value so driver can
 583          * locate the frame within the tx queue and do post-tx processing.
 584          */
 585         out_cmd->hdr.cmd = REPLY_TX;
 586         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 587                                 INDEX_TO_SEQ(q->write_ptr)));
 588
 589         /* Copy MAC header from skb into command buffer */
 590         memcpy(tx->hdr, hdr, hdr_len);
 591
 592
 593         if (info->control.hw_key)
 594                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 595
 596         /* TODO need this for burst mode later on */
 597         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 598
 599         /* set is_hcca to 0; it probably will never be implemented */
 600         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 601
 602         /* Total # bytes to be transmitted */
 603         len = (u16)skb->len;
 604         tx->len = cpu_to_le16(len);
 605
 606         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 607         iwl_update_stats(priv, true, fc, len);
 608         tx->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 609         tx->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 610
 611         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 612                 txq->need_update = 1;
 613                 if (qc)
 614                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 615         } else {
 616                 wait_write_ptr = 1;
 617                 txq->need_update = 0;
 618         }
 619
 620         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 621                      le16_to_cpu(out_cmd->hdr.sequence));
 622         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx->tx_flags));
 623         iwl_print_hex_dump(priv, IWL_DL_TX, tx, sizeof(*tx));
 624         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx->hdr,
 625                            ieee80211_hdrlen(fc));
 626
 627         /*
 628          * Use the first empty entry in this queue's command buffer array
 629          * to contain the Tx command and MAC header concatenated together
 630          * (payload data will be in another buffer).
 631          * Size of this varies, due to varying MAC header length.
 632          * If end is not dword aligned, we'll have 2 extra bytes at the end
 633          * of the MAC header (device reads on dword boundaries).
 634          * We'll tell device about this padding later.
 635          */
 636         len = sizeof(struct iwl3945_tx_cmd) +
 637                         sizeof(struct iwl_cmd_header) + hdr_len;
 638
 639         len_org = len;
 640         len = (len + 3) & ~3;
 641
 642         if (len_org != len)
 643                 len_org = 1;
 644         else
 645                 len_org = 0;
 646
 647         /* Physical address of this Tx command's header (not MAC header!),
 648          * within command buffer array. */
 649         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 650                                     len, PCI_DMA_TODEVICE);
 651         /* we do not map meta data ... so we can safely access address to
 652          * provide to unmap command*/
 653         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 654         pci_unmap_len_set(out_meta, len, len);
 655
 656         /* Add buffer containing Tx command and MAC(!) header to TFD's
 657          * first entry */
 658         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 659                                                    txcmd_phys, len, 1, 0);
 660
 661
 662         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 663          * if any (802.11 null frames have no payload). */
 664         len = skb->len - hdr_len;
 665         if (len) {
 666                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 667                                            len, PCI_DMA_TODEVICE);
 668                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 669                                                            phys_addr, len,
 670                                                            0, U32_PAD(len));
 671         }
 672
 673
 674         /* Tell device the write index *just past* this latest filled TFD */
 675         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 676         rc = iwl_txq_update_write_ptr(priv, txq);
 677         spin_unlock_irqrestore(&priv->lock, flags);
 678
 679         if (rc)
 680                 return rc;
 681
 682         if ((iwl_queue_space(q) < q->high_mark)
 683             && priv->mac80211_registered) {
 684                 if (wait_write_ptr) {
 685                         spin_lock_irqsave(&priv->lock, flags);
 686                         txq->need_update = 1;
 687                         iwl_txq_update_write_ptr(priv, txq);
 688                         spin_unlock_irqrestore(&priv->lock, flags);
 689                 }
 690
 691                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 692         }
 693
 694         return 0;
 695
 696 drop_unlock:
 697         spin_unlock_irqrestore(&priv->lock, flags);
 698 drop:
 699         return -1;
 700 }
 701
 702 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 703
 704 #include "iwl-spectrum.h"
 705
 706 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 707 #define BEACON_TIME_MASK_HIGH   0xFF000000
 708 #define TIME_UNIT               1024
 709
 710 /*
 711  * extended beacon time format
 712  * time in usec will be changed into a 32-bit value in 8:24 format
 713  * the high 1 byte is the beacon counts
 714  * the lower 3 bytes is the time in usec within one beacon interval
 715  */
 716
 717 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 718 {
 719         u32 quot;
 720         u32 rem;
 721         u32 interval = beacon_interval * 1024;
 722
 723         if (!interval || !usec)
 724                 return 0;
 725
 726         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 727         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 728
 729         return (quot << 24) + rem;
 730 }
 731
 732 /* base is usually what we get from ucode with each received frame,
 733  * the same as HW timer counter counting down
 734  */
 735
 736 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 737 {
 738         u32 base_low = base & BEACON_TIME_MASK_LOW;
 739         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 740         u32 interval = beacon_interval * TIME_UNIT;
 741         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 742             (addon & BEACON_TIME_MASK_HIGH);
 743
 744         if (base_low > addon_low)
 745                 res += base_low - addon_low;
 746         else if (base_low < addon_low) {
 747                 res += interval + base_low - addon_low;
 748                 res += (1 << 24);
 749         } else
 750                 res += (1 << 24);
 751
 752         return cpu_to_le32(res);
 753 }
 754
 755 static int iwl3945_get_measurement(struct iwl_priv *priv,
 756                                struct ieee80211_measurement_params *params,
 757                                u8 type)
 758 {
 759         struct iwl_spectrum_cmd spectrum;
 760         struct iwl_rx_packet *res;
 761         struct iwl_host_cmd cmd = {
 762                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 763                 .data = (void *)&spectrum,
 764                 .flags = CMD_WANT_SKB,
 765         };
 766         u32 add_time = le64_to_cpu(params->start_time);
 767         int rc;
 768         int spectrum_resp_status;
 769         int duration = le16_to_cpu(params->duration);
 770
 771         if (iwl_is_associated(priv))
 772                 add_time =
 773                     iwl3945_usecs_to_beacons(
 774                         le64_to_cpu(params->start_time) - priv->last_tsf,
 775                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 776
 777         memset(&spectrum, 0, sizeof(spectrum));
 778
 779         spectrum.channel_count = cpu_to_le16(1);
 780         spectrum.flags =
 781             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 782         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 783         cmd.len = sizeof(spectrum);
 784         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 785
 786         if (iwl_is_associated(priv))
 787                 spectrum.start_time =
 788                     iwl3945_add_beacon_time(priv->last_beacon_time,
 789                                 add_time,
 790                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 791         else
 792                 spectrum.start_time = 0;
 793
 794         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 795         spectrum.channels[0].channel = params->channel;
 796         spectrum.channels[0].type = type;
 797         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 798                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 799                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 800
 801         rc = iwl_send_cmd_sync(priv, &cmd);
 802         if (rc)
 803                 return rc;
 804
 805         res = (struct iwl_rx_packet *)cmd.reply_skb->data;
 806         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 807                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 808                 rc = -EIO;
 809         }
 810
 811         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 812         switch (spectrum_resp_status) {
 813         case 0:         /* Command will be handled */
 814                 if (res->u.spectrum.id != 0xff) {
 815                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 816                                                 res->u.spectrum.id);
 817                         priv->measurement_status &= ~MEASUREMENT_READY;
 818                 }
 819                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 820                 rc = 0;
 821                 break;
 822
 823         case 1:         /* Command will not be handled */
 824                 rc = -EAGAIN;
 825                 break;
 826         }
 827
 828         dev_kfree_skb_any(cmd.reply_skb);
 829
 830         return rc;
 831 }
 832 #endif
 833
 834 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 835                                struct iwl_rx_mem_buffer *rxb)
 836 {
 837         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 838         struct iwl_alive_resp *palive;
 839         struct delayed_work *pwork;
 840
 841         palive = &pkt->u.alive_frame;
 842
 843         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 844                        "0x%01X 0x%01X\n",
 845                        palive->is_valid, palive->ver_type,
 846                        palive->ver_subtype);
 847
 848         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 849                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 850                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 851                        sizeof(struct iwl_alive_resp));
 852                 pwork = &priv->init_alive_start;
 853         } else {
 854                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 855                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 856                        sizeof(struct iwl_alive_resp));
 857                 pwork = &priv->alive_start;
 858                 iwl3945_disable_events(priv);
 859         }
 860
 861         /* We delay the ALIVE response by 5ms to
 862          * give the HW RF Kill time to activate... */
 863         if (palive->is_valid == UCODE_VALID_OK)
 864                 queue_delayed_work(priv->workqueue, pwork,
 865                                    msecs_to_jiffies(5));
 866         else
 867                 IWL_WARN(priv, "uCode did not respond OK.\n");
 868 }
 869
 870 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 871                                  struct iwl_rx_mem_buffer *rxb)
 872 {
 873 #ifdef CONFIG_IWLWIFI_DEBUG
 874         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 875 #endif
 876
 877         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 878         return;
 879 }
 880
 881 static void iwl3945_bg_beacon_update(struct work_struct *work)
 882 {
 883         struct iwl_priv *priv =
 884                 container_of(work, struct iwl_priv, beacon_update);
 885         struct sk_buff *beacon;
 886
 887         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 888         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 889
 890         if (!beacon) {
 891                 IWL_ERR(priv, "update beacon failed\n");
 892                 return;
 893         }
 894
 895         mutex_lock(&priv->mutex);
 896         /* new beacon skb is allocated every time; dispose previous.*/
 897         if (priv->ibss_beacon)
 898                 dev_kfree_skb(priv->ibss_beacon);
 899
 900         priv->ibss_beacon = beacon;
 901         mutex_unlock(&priv->mutex);
 902
 903         iwl3945_send_beacon_cmd(priv);
 904 }
 905
 906 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 907                                 struct iwl_rx_mem_buffer *rxb)
 908 {
 909 #ifdef CONFIG_IWLWIFI_DEBUG
 910         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 911         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 912         u8 rate = beacon->beacon_notify_hdr.rate;
 913
 914         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 915                 "tsf %d %d rate %d\n",
 916                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 917                 beacon->beacon_notify_hdr.failure_frame,
 918                 le32_to_cpu(beacon->ibss_mgr_status),
 919                 le32_to_cpu(beacon->high_tsf),
 920                 le32_to_cpu(beacon->low_tsf), rate);
 921 #endif
 922
 923         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 924             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 925                 queue_work(priv->workqueue, &priv->beacon_update);
 926 }
 927
 928 /* Handle notification from uCode that card's power state is changing
 929  * due to software, hardware, or critical temperature RFKILL */
 930 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 931                                     struct iwl_rx_mem_buffer *rxb)
 932 {
 933         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
 934         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 935         unsigned long status = priv->status;
 936
 937         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 938                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 939                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 940
 941         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 942                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 943
 944         if (flags & HW_CARD_DISABLED)
 945                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 946         else
 947                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 948
 949
 950         iwl_scan_cancel(priv);
 951
 952         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 953              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 954                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 955                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 956         else
 957                 wake_up_interruptible(&priv->wait_command_queue);
 958 }
 959
 960 /**
 961  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 962  *
 963  * Setup the RX handlers for each of the reply types sent from the uCode
 964  * to the host.
 965  *
 966  * This function chains into the hardware specific files for them to setup
 967  * any hardware specific handlers as well.
 968  */
 969 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 970 {
 971         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 972         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 973         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 974         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 975         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 976         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 977             iwl_rx_pm_debug_statistics_notif;
 978         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 979
 980         /*
 981          * The same handler is used for both the REPLY to a discrete
 982          * statistics request from the host as well as for the periodic
 983          * statistics notifications (after received beacons) from the uCode.
 984          */
 985         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 986         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 987
 988         iwl_setup_spectrum_handlers(priv);
 989         iwl_setup_rx_scan_handlers(priv);
 990         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 991
 992         /* Set up hardware specific Rx handlers */
 993         iwl3945_hw_rx_handler_setup(priv);
 994 }
 995
 996 /************************** RX-FUNCTIONS ****************************/
 997 /*
 998  * Rx theory of operation
 999  *
1000  * The host allocates 32 DMA target addresses and passes the host address
1001  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
1002  * 0 to 31
1003  *
1004  * Rx Queue Indexes
1005  * The host/firmware share two index registers for managing the Rx buffers.
1006  *
1007  * The READ index maps to the first position that the firmware may be writing
1008  * to -- the driver can read up to (but not including) this position and get
1009  * good data.
1010  * The READ index is managed by the firmware once the card is enabled.
1011  *
1012  * The WRITE index maps to the last position the driver has read from -- the
1013  * position preceding WRITE is the last slot the firmware can place a packet.
1014  *
1015  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1016  * WRITE = READ.
1017  *
1018  * During initialization, the host sets up the READ queue position to the first
1019  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1020  *
1021  * When the firmware places a packet in a buffer, it will advance the READ index
1022  * and fire the RX interrupt.  The driver can then query the READ index and
1023  * process as many packets as possible, moving the WRITE index forward as it
1024  * resets the Rx queue buffers with new memory.
1025  *
1026  * The management in the driver is as follows:
1027  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1028  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1029  *   to replenish the iwl->rxq->rx_free.
1030  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1031  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1032  *   'processed' and 'read' driver indexes as well)
1033  * + A received packet is processed and handed to the kernel network stack,
1034  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1035  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1036  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1037  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1038  *   were enough free buffers and RX_STALLED is set it is cleared.
1039  *
1040  *
1041  * Driver sequence:
1042  *
1043  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1044  *                            iwl3945_rx_queue_restock
1045  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1046  *                            queue, updates firmware pointers, and updates
1047  *                            the WRITE index.  If insufficient rx_free buffers
1048  *                            are available, schedules iwl3945_rx_replenish
1049  *
1050  * -- enable interrupts --
1051  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1052  *                            READ INDEX, detaching the SKB from the pool.
1053  *                            Moves the packet buffer from queue to rx_used.
1054  *                            Calls iwl3945_rx_queue_restock to refill any empty
1055  *                            slots.
1056  * ...
1057  *
1058  */
1059
1060 /**
1061  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1062  */
1063 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1064                                           dma_addr_t dma_addr)
1065 {
1066         return cpu_to_le32((u32)dma_addr);
1067 }
1068
1069 /**
1070  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1071  *
1072  * If there are slots in the RX queue that need to be restocked,
1073  * and we have free pre-allocated buffers, fill the ranks as much
1074  * as we can, pulling from rx_free.
1075  *
1076  * This moves the 'write' index forward to catch up with 'processed', and
1077  * also updates the memory address in the firmware to reference the new
1078  * target buffer.
1079  */
1080 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1081 {
1082         struct iwl_rx_queue *rxq = &priv->rxq;
1083         struct list_head *element;
1084         struct iwl_rx_mem_buffer *rxb;
1085         unsigned long flags;
1086         int write, rc;
1087
1088         spin_lock_irqsave(&rxq->lock, flags);
1089         write = rxq->write & ~0x7;
1090         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1091                 /* Get next free Rx buffer, remove from free list */
1092                 element = rxq->rx_free.next;
1093                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1094                 list_del(element);
1095
1096                 /* Point to Rx buffer via next RBD in circular buffer */
1097                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->real_dma_addr);
1098                 rxq->queue[rxq->write] = rxb;
1099                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1100                 rxq->free_count--;
1101         }
1102         spin_unlock_irqrestore(&rxq->lock, flags);
1103         /* If the pre-allocated buffer pool is dropping low, schedule to
1104          * refill it */
1105         if (rxq->free_count <= RX_LOW_WATERMARK)
1106                 queue_work(priv->workqueue, &priv->rx_replenish);
1107
1108
1109         /* If we've added more space for the firmware to place data, tell it.
1110          * Increment device's write pointer in multiples of 8. */
1111         if ((rxq->write_actual != (rxq->write & ~0x7))
1112             || (abs(rxq->write - rxq->read) > 7)) {
1113                 spin_lock_irqsave(&rxq->lock, flags);
1114                 rxq->need_update = 1;
1115                 spin_unlock_irqrestore(&rxq->lock, flags);
1116                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1117                 if (rc)
1118                         return rc;
1119         }
1120
1121         return 0;
1122 }
1123
1124 /**
1125  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1126  *
1127  * When moving to rx_free an SKB is allocated for the slot.
1128  *
1129  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1130  * This is called as a scheduled work item (except for during initialization)
1131  */
1132 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1133 {
1134         struct iwl_rx_queue *rxq = &priv->rxq;
1135         struct list_head *element;
1136         struct iwl_rx_mem_buffer *rxb;
1137         unsigned long flags;
1138
1139         while (1) {
1140                 spin_lock_irqsave(&rxq->lock, flags);
1141
1142                 if (list_empty(&rxq->rx_used)) {
1143                         spin_unlock_irqrestore(&rxq->lock, flags);
1144                         return;
1145                 }
1146
1147                 element = rxq->rx_used.next;
1148                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1149                 list_del(element);
1150                 spin_unlock_irqrestore(&rxq->lock, flags);
1151
1152                 /* Alloc a new receive buffer */
1153                 rxb->skb =
1154                     alloc_skb(priv->hw_params.rx_buf_size,
1155                                 priority);
1156                 if (!rxb->skb) {
1157                         if (net_ratelimit())
1158                                 IWL_CRIT(priv, ": Can not allocate SKB buffers\n");
1159                         /* We don't reschedule replenish work here -- we will
1160                          * call the restock method and if it still needs
1161                          * more buffers it will schedule replenish */
1162                         break;
1163                 }
1164
1165                 /* If radiotap head is required, reserve some headroom here.
1166                  * The physical head count is a variable rx_stats->phy_count.
1167                  * We reserve 4 bytes here. Plus these extra bytes, the
1168                  * headroom of the physical head should be enough for the
1169                  * radiotap head that iwl3945 supported. See iwl3945_rt.
1170                  */
1171                 skb_reserve(rxb->skb, 4);
1172
1173                 /* Get physical address of RB/SKB */
1174                 rxb->real_dma_addr = pci_map_single(priv->pci_dev,
1175                                                 rxb->skb->data,
1176                                                 priv->hw_params.rx_buf_size,
1177                                                 PCI_DMA_FROMDEVICE);
1178
1179                 spin_lock_irqsave(&rxq->lock, flags);
1180                 list_add_tail(&rxb->list, &rxq->rx_free);
1181                 priv->alloc_rxb_skb++;
1182                 rxq->free_count++;
1183                 spin_unlock_irqrestore(&rxq->lock, flags);
1184         }
1185 }
1186
1187 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1188 {
1189         unsigned long flags;
1190         int i;
1191         spin_lock_irqsave(&rxq->lock, flags);
1192         INIT_LIST_HEAD(&rxq->rx_free);
1193         INIT_LIST_HEAD(&rxq->rx_used);
1194         /* Fill the rx_used queue with _all_ of the Rx buffers */
1195         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1196                 /* In the reset function, these buffers may have been allocated
1197                  * to an SKB, so we need to unmap and free potential storage */
1198                 if (rxq->pool[i].skb != NULL) {
1199                         pci_unmap_single(priv->pci_dev,
1200                                          rxq->pool[i].real_dma_addr,
1201                                          priv->hw_params.rx_buf_size,
1202                                          PCI_DMA_FROMDEVICE);
1203                         priv->alloc_rxb_skb--;
1204                         dev_kfree_skb(rxq->pool[i].skb);
1205                         rxq->pool[i].skb = NULL;
1206                 }
1207                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1208         }
1209
1210         /* Set us so that we have processed and used all buffers, but have
1211          * not restocked the Rx queue with fresh buffers */
1212         rxq->read = rxq->write = 0;
1213         rxq->free_count = 0;
1214         rxq->write_actual = 0;
1215         spin_unlock_irqrestore(&rxq->lock, flags);
1216 }
1217
1218 void iwl3945_rx_replenish(void *data)
1219 {
1220         struct iwl_priv *priv = data;
1221         unsigned long flags;
1222
1223         iwl3945_rx_allocate(priv, GFP_KERNEL);
1224
1225         spin_lock_irqsave(&priv->lock, flags);
1226         iwl3945_rx_queue_restock(priv);
1227         spin_unlock_irqrestore(&priv->lock, flags);
1228 }
1229
1230 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1231 {
1232         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1233
1234         iwl3945_rx_queue_restock(priv);
1235 }
1236
1237
1238 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1239  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1240  * This free routine walks the list of POOL entries and if SKB is set to
1241  * non NULL it is unmapped and freed
1242  */
1243 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1244 {
1245         int i;
1246         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1247                 if (rxq->pool[i].skb != NULL) {
1248                         pci_unmap_single(priv->pci_dev,
1249                                          rxq->pool[i].real_dma_addr,
1250                                          priv->hw_params.rx_buf_size,
1251                                          PCI_DMA_FROMDEVICE);
1252                         dev_kfree_skb(rxq->pool[i].skb);
1253                 }
1254         }
1255
1256         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1257                             rxq->dma_addr);
1258         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1259                             rxq->rb_stts, rxq->rb_stts_dma);
1260         rxq->bd = NULL;
1261         rxq->rb_stts  = NULL;
1262 }
1263
1264
1265 /* Convert linear signal-to-noise ratio into dB */
1266 static u8 ratio2dB[100] = {
1267 /*       0   1   2   3   4   5   6   7   8   9 */
1268          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1269         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1270         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1271         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1272         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1273         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1274         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1275         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1276         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1277         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1278 };
1279
1280 /* Calculates a relative dB value from a ratio of linear
1281  *   (i.e. not dB) signal levels.
1282  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1283 int iwl3945_calc_db_from_ratio(int sig_ratio)
1284 {
1285         /* 1000:1 or higher just report as 60 dB */
1286         if (sig_ratio >= 1000)
1287                 return 60;
1288
1289         /* 100:1 or higher, divide by 10 and use table,
1290          *   add 20 dB to make up for divide by 10 */
1291         if (sig_ratio >= 100)
1292                 return 20 + (int)ratio2dB[sig_ratio/10];
1293
1294         /* We shouldn't see this */
1295         if (sig_ratio < 1)
1296                 return 0;
1297
1298         /* Use table for ratios 1:1 - 99:1 */
1299         return (int)ratio2dB[sig_ratio];
1300 }
1301
1302 #define PERFECT_RSSI (-20) /* dBm */
1303 #define WORST_RSSI (-95)   /* dBm */
1304 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1305
1306 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1307  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1308  *   about formulas used below. */
1309 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1310 {
1311         int sig_qual;
1312         int degradation = PERFECT_RSSI - rssi_dbm;
1313
1314         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1315          * as indicator; formula is (signal dbm - noise dbm).
1316          * SNR at or above 40 is a great signal (100%).
1317          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1318          * Weakest usable signal is usually 10 - 15 dB SNR. */
1319         if (noise_dbm) {
1320                 if (rssi_dbm - noise_dbm >= 40)
1321                         return 100;
1322                 else if (rssi_dbm < noise_dbm)
1323                         return 0;
1324                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1325
1326         /* Else use just the signal level.
1327          * This formula is a least squares fit of data points collected and
1328          *   compared with a reference system that had a percentage (%) display
1329          *   for signal quality. */
1330         } else
1331                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1332                             (15 * RSSI_RANGE + 62 * degradation)) /
1333                            (RSSI_RANGE * RSSI_RANGE);
1334
1335         if (sig_qual > 100)
1336                 sig_qual = 100;
1337         else if (sig_qual < 1)
1338                 sig_qual = 0;
1339
1340         return sig_qual;
1341 }
1342
1343 /**
1344  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1345  *
1346  * Uses the priv->rx_handlers callback function array to invoke
1347  * the appropriate handlers, including command responses,
1348  * frame-received notifications, and other notifications.
1349  */
1350 static void iwl3945_rx_handle(struct iwl_priv *priv)
1351 {
1352         struct iwl_rx_mem_buffer *rxb;
1353         struct iwl_rx_packet *pkt;
1354         struct iwl_rx_queue *rxq = &priv->rxq;
1355         u32 r, i;
1356         int reclaim;
1357         unsigned long flags;
1358         u8 fill_rx = 0;
1359         u32 count = 8;
1360         int total_empty = 0;
1361
1362         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1363          * buffer that the driver may process (last buffer filled by ucode). */
1364         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1365         i = rxq->read;
1366
1367         /* calculate total frames need to be restock after handling RX */
1368         total_empty = r - priv->rxq.write_actual;
1369         if (total_empty < 0)
1370                 total_empty += RX_QUEUE_SIZE;
1371
1372         if (total_empty > (RX_QUEUE_SIZE / 2))
1373                 fill_rx = 1;
1374         /* Rx interrupt, but nothing sent from uCode */
1375         if (i == r)
1376                 IWL_DEBUG(priv, IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
1377
1378         while (i != r) {
1379                 rxb = rxq->queue[i];
1380
1381                 /* If an RXB doesn't have a Rx queue slot associated with it,
1382                  * then a bug has been introduced in the queue refilling
1383                  * routines -- catch it here */
1384                 BUG_ON(rxb == NULL);
1385
1386                 rxq->queue[i] = NULL;
1387
1388                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1389                                 priv->hw_params.rx_buf_size,
1390                                 PCI_DMA_FROMDEVICE);
1391                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1392
1393                 /* Reclaim a command buffer only if this packet is a response
1394                  *   to a (driver-originated) command.
1395                  * If the packet (e.g. Rx frame) originated from uCode,
1396                  *   there is no command buffer to reclaim.
1397                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1398                  *   but apparently a few don't get set; catch them here. */
1399                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1400                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1401                         (pkt->hdr.cmd != REPLY_TX);
1402
1403                 /* Based on type of command response or notification,
1404                  *   handle those that need handling via function in
1405                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1406                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1407                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1408                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
1409                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1410                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1411                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1412                 } else {
1413                         /* No handling needed */
1414                         IWL_DEBUG(priv, IWL_DL_HCMD | IWL_DL_RX | IWL_DL_ISR,
1415                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1416                                 r, i, get_cmd_string(pkt->hdr.cmd),
1417                                 pkt->hdr.cmd);
1418                 }
1419
1420                 if (reclaim) {
1421                         /* Invoke any callbacks, transfer the skb to caller, and
1422                          * fire off the (possibly) blocking iwl_send_cmd()
1423                          * as we reclaim the driver command queue */
1424                         if (rxb && rxb->skb)
1425                                 iwl_tx_cmd_complete(priv, rxb);
1426                         else
1427                                 IWL_WARN(priv, "Claim null rxb?\n");
1428                 }
1429
1430                 /* For now we just don't re-use anything.  We can tweak this
1431                  * later to try and re-use notification packets and SKBs that
1432                  * fail to Rx correctly */
1433                 if (rxb->skb != NULL) {
1434                         priv->alloc_rxb_skb--;
1435                         dev_kfree_skb_any(rxb->skb);
1436                         rxb->skb = NULL;
1437                 }
1438
1439                 spin_lock_irqsave(&rxq->lock, flags);
1440                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1441                 spin_unlock_irqrestore(&rxq->lock, flags);
1442                 i = (i + 1) & RX_QUEUE_MASK;
1443                 /* If there are a lot of unused frames,
1444                  * restock the Rx queue so ucode won't assert. */
1445                 if (fill_rx) {
1446                         count++;
1447                         if (count >= 8) {
1448                                 priv->rxq.read = i;
1449                                 iwl3945_rx_replenish_now(priv);
1450                                 count = 0;
1451                         }
1452                 }
1453         }
1454
1455         /* Backtrack one entry */
1456         priv->rxq.read = i;
1457         if (fill_rx)
1458                 iwl3945_rx_replenish_now(priv);
1459         else
1460                 iwl3945_rx_queue_restock(priv);
1461 }
1462
1463 /* call this function to flush any scheduled tasklet */
1464 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1465 {
1466         /* wait to make sure we flush pending tasklet*/
1467         synchronize_irq(priv->pci_dev->irq);
1468         tasklet_kill(&priv->irq_tasklet);
1469 }
1470
1471 static const char *desc_lookup(int i)
1472 {
1473         switch (i) {
1474         case 1:
1475                 return "FAIL";
1476         case 2:
1477                 return "BAD_PARAM";
1478         case 3:
1479                 return "BAD_CHECKSUM";
1480         case 4:
1481                 return "NMI_INTERRUPT";
1482         case 5:
1483                 return "SYSASSERT";
1484         case 6:
1485                 return "FATAL_ERROR";
1486         }
1487
1488         return "UNKNOWN";
1489 }
1490
1491 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1492 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1493
1494 static void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1495 {
1496         u32 i;
1497         u32 desc, time, count, base, data1;
1498         u32 blink1, blink2, ilink1, ilink2;
1499
1500         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1501
1502         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1503                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1504                 return;
1505         }
1506
1507
1508         count = iwl_read_targ_mem(priv, base);
1509
1510         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1511                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1512                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1513                         priv->status, count);
1514         }
1515
1516         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1517                   "ilink1  nmiPC   Line\n");
1518         for (i = ERROR_START_OFFSET;
1519              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1520              i += ERROR_ELEM_SIZE) {
1521                 desc = iwl_read_targ_mem(priv, base + i);
1522                 time =
1523                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1524                 blink1 =
1525                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1526                 blink2 =
1527                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1528                 ilink1 =
1529                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1530                 ilink2 =
1531                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1532                 data1 =
1533                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1534
1535                 IWL_ERR(priv,
1536                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1537                         desc_lookup(desc), desc, time, blink1, blink2,
1538                         ilink1, ilink2, data1);
1539         }
1540
1541 }
1542
1543 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1544
1545 /**
1546  * iwl3945_print_event_log - Dump error event log to syslog
1547  *
1548  */
1549 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1550                                 u32 num_events, u32 mode)
1551 {
1552         u32 i;
1553         u32 base;       /* SRAM byte address of event log header */
1554         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1555         u32 ptr;        /* SRAM byte address of log data */
1556         u32 ev, time, data; /* event log data */
1557
1558         if (num_events == 0)
1559                 return;
1560
1561         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1562
1563         if (mode == 0)
1564                 event_size = 2 * sizeof(u32);
1565         else
1566                 event_size = 3 * sizeof(u32);
1567
1568         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1569
1570         /* "time" is actually "data" for mode 0 (no timestamp).
1571          * place event id # at far right for easier visual parsing. */
1572         for (i = 0; i < num_events; i++) {
1573                 ev = iwl_read_targ_mem(priv, ptr);
1574                 ptr += sizeof(u32);
1575                 time = iwl_read_targ_mem(priv, ptr);
1576                 ptr += sizeof(u32);
1577                 if (mode == 0) {
1578                         /* data, ev */
1579                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1580                 } else {
1581                         data = iwl_read_targ_mem(priv, ptr);
1582                         ptr += sizeof(u32);
1583                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1584                 }
1585         }
1586 }
1587
1588 static void iwl3945_dump_nic_event_log(struct iwl_priv *priv)
1589 {
1590         u32 base;       /* SRAM byte address of event log header */
1591         u32 capacity;   /* event log capacity in # entries */
1592         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1593         u32 num_wraps;  /* # times uCode wrapped to top of log */
1594         u32 next_entry; /* index of next entry to be written by uCode */
1595         u32 size;       /* # entries that we'll print */
1596
1597         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1598         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1599                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1600                 return;
1601         }
1602
1603         /* event log header */
1604         capacity = iwl_read_targ_mem(priv, base);
1605         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1606         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1607         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1608
1609         size = num_wraps ? capacity : next_entry;
1610
1611         /* bail out if nothing in log */
1612         if (size == 0) {
1613                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1614                 return;
1615         }
1616
1617         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1618                   size, num_wraps);
1619
1620         /* if uCode has wrapped back to top of log, start at the oldest entry,
1621          * i.e the next one that uCode would fill. */
1622         if (num_wraps)
1623                 iwl3945_print_event_log(priv, next_entry,
1624                                     capacity - next_entry, mode);
1625
1626         /* (then/else) start at top of log */
1627         iwl3945_print_event_log(priv, 0, next_entry, mode);
1628
1629 }
1630
1631 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1632 {
1633         u32 inta, handled = 0;
1634         u32 inta_fh;
1635         unsigned long flags;
1636 #ifdef CONFIG_IWLWIFI_DEBUG
1637         u32 inta_mask;
1638 #endif
1639
1640         spin_lock_irqsave(&priv->lock, flags);
1641
1642         /* Ack/clear/reset pending uCode interrupts.
1643          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1644          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1645         inta = iwl_read32(priv, CSR_INT);
1646         iwl_write32(priv, CSR_INT, inta);
1647
1648         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1649          * Any new interrupts that happen after this, either while we're
1650          * in this tasklet, or later, will show up in next ISR/tasklet. */
1651         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1652         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1653
1654 #ifdef CONFIG_IWLWIFI_DEBUG
1655         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1656                 /* just for debug */
1657                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1658                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1659                               inta, inta_mask, inta_fh);
1660         }
1661 #endif
1662
1663         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1664          * atomic, make sure that inta covers all the interrupts that
1665          * we've discovered, even if FH interrupt came in just after
1666          * reading CSR_INT. */
1667         if (inta_fh & CSR39_FH_INT_RX_MASK)
1668                 inta |= CSR_INT_BIT_FH_RX;
1669         if (inta_fh & CSR39_FH_INT_TX_MASK)
1670                 inta |= CSR_INT_BIT_FH_TX;
1671
1672         /* Now service all interrupt bits discovered above. */
1673         if (inta & CSR_INT_BIT_HW_ERR) {
1674                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1675
1676                 /* Tell the device to stop sending interrupts */
1677                 iwl_disable_interrupts(priv);
1678
1679                 priv->isr_stats.hw++;
1680                 iwl_irq_handle_error(priv);
1681
1682                 handled |= CSR_INT_BIT_HW_ERR;
1683
1684                 spin_unlock_irqrestore(&priv->lock, flags);
1685
1686                 return;
1687         }
1688
1689 #ifdef CONFIG_IWLWIFI_DEBUG
1690         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1691                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1692                 if (inta & CSR_INT_BIT_SCD) {
1693                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1694                                       "the frame/frames.\n");
1695                         priv->isr_stats.sch++;
1696                 }
1697
1698                 /* Alive notification via Rx interrupt will do the real work */
1699                 if (inta & CSR_INT_BIT_ALIVE) {
1700                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1701                         priv->isr_stats.alive++;
1702                 }
1703         }
1704 #endif
1705         /* Safely ignore these bits for debug checks below */
1706         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1707
1708         /* Error detected by uCode */
1709         if (inta & CSR_INT_BIT_SW_ERR) {
1710                 IWL_ERR(priv, "Microcode SW error detected. "
1711                         "Restarting 0x%X.\n", inta);
1712                 priv->isr_stats.sw++;
1713                 priv->isr_stats.sw_err = inta;
1714                 iwl_irq_handle_error(priv);
1715                 handled |= CSR_INT_BIT_SW_ERR;
1716         }
1717
1718         /* uCode wakes up after power-down sleep */
1719         if (inta & CSR_INT_BIT_WAKEUP) {
1720                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1721                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1722                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1723                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1724                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1725                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1726                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1727                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1728
1729                 priv->isr_stats.wakeup++;
1730                 handled |= CSR_INT_BIT_WAKEUP;
1731         }
1732
1733         /* All uCode command responses, including Tx command responses,
1734          * Rx "responses" (frame-received notification), and other
1735          * notifications from uCode come through here*/
1736         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1737                 iwl3945_rx_handle(priv);
1738                 priv->isr_stats.rx++;
1739                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1740         }
1741
1742         if (inta & CSR_INT_BIT_FH_TX) {
1743                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1744                 priv->isr_stats.tx++;
1745
1746                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1747                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1748                                         (FH39_SRVC_CHNL), 0x0);
1749                 handled |= CSR_INT_BIT_FH_TX;
1750         }
1751
1752         if (inta & ~handled) {
1753                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1754                 priv->isr_stats.unhandled++;
1755         }
1756
1757         if (inta & ~priv->inta_mask) {
1758                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1759                          inta & ~priv->inta_mask);
1760                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1761         }
1762
1763         /* Re-enable all interrupts */
1764         /* only Re-enable if disabled by irq */
1765         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1766                 iwl_enable_interrupts(priv);
1767
1768 #ifdef CONFIG_IWLWIFI_DEBUG
1769         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1770                 inta = iwl_read32(priv, CSR_INT);
1771                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1772                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1773                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1774                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1775         }
1776 #endif
1777         spin_unlock_irqrestore(&priv->lock, flags);
1778 }
1779
1780 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1781                                          enum ieee80211_band band,
1782                                      u8 is_active, u8 n_probes,
1783                                      struct iwl3945_scan_channel *scan_ch)
1784 {
1785         struct ieee80211_channel *chan;
1786         const struct ieee80211_supported_band *sband;
1787         const struct iwl_channel_info *ch_info;
1788         u16 passive_dwell = 0;
1789         u16 active_dwell = 0;
1790         int added, i;
1791
1792         sband = iwl_get_hw_mode(priv, band);
1793         if (!sband)
1794                 return 0;
1795
1796         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1797         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1798
1799         if (passive_dwell <= active_dwell)
1800                 passive_dwell = active_dwell + 1;
1801
1802         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1803                 chan = priv->scan_request->channels[i];
1804
1805                 if (chan->band != band)
1806                         continue;
1807
1808                 scan_ch->channel = chan->hw_value;
1809
1810                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1811                 if (!is_channel_valid(ch_info)) {
1812                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1813                                        scan_ch->channel);
1814                         continue;
1815                 }
1816
1817                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1818                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1819                 /* If passive , set up for auto-switch
1820                  *  and use long active_dwell time.
1821                  */
1822                 if (!is_active || is_channel_passive(ch_info) ||
1823                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1824                         scan_ch->type = 0;      /* passive */
1825                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1826                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1827                 } else {
1828                         scan_ch->type = 1;      /* active */
1829                 }
1830
1831                 /* Set direct probe bits. These may be used both for active
1832                  * scan channels (probes gets sent right away),
1833                  * or for passive channels (probes get se sent only after
1834                  * hearing clear Rx packet).*/
1835                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1836                         if (n_probes)
1837                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1838                 } else {
1839                         /* uCode v1 does not allow setting direct probe bits on
1840                          * passive channel. */
1841                         if ((scan_ch->type & 1) && n_probes)
1842                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1843                 }
1844
1845                 /* Set txpower levels to defaults */
1846                 scan_ch->tpc.dsp_atten = 110;
1847                 /* scan_pwr_info->tpc.dsp_atten; */
1848
1849                 /*scan_pwr_info->tpc.tx_gain; */
1850                 if (band == IEEE80211_BAND_5GHZ)
1851                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1852                 else {
1853                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1854                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1855                          * power level:
1856                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1857                          */
1858                 }
1859
1860                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1861                                scan_ch->channel,
1862                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1863                                (scan_ch->type & 1) ?
1864                                active_dwell : passive_dwell);
1865
1866                 scan_ch++;
1867                 added++;
1868         }
1869
1870         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1871         return added;
1872 }
1873
1874 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1875                               struct ieee80211_rate *rates)
1876 {
1877         int i;
1878
1879         for (i = 0; i < IWL_RATE_COUNT; i++) {
1880                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1881                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1882                 rates[i].hw_value_short = i;
1883                 rates[i].flags = 0;
1884                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1885                         /*
1886                          * If CCK != 1M then set short preamble rate flag.
1887                          */
1888                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1889                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1890                 }
1891         }
1892 }
1893
1894 /******************************************************************************
1895  *
1896  * uCode download functions
1897  *
1898  ******************************************************************************/
1899
1900 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1901 {
1902         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1903         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1904         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1905         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1906         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1907         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1908 }
1909
1910 /**
1911  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1912  *     looking at all data.
1913  */
1914 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1915 {
1916         u32 val;
1917         u32 save_len = len;
1918         int rc = 0;
1919         u32 errcnt;
1920
1921         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1922
1923         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1924                                IWL39_RTC_INST_LOWER_BOUND);
1925
1926         errcnt = 0;
1927         for (; len > 0; len -= sizeof(u32), image++) {
1928                 /* read data comes through single port, auto-incr addr */
1929                 /* NOTE: Use the debugless read so we don't flood kernel log
1930                  * if IWL_DL_IO is set */
1931                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1932                 if (val != le32_to_cpu(*image)) {
1933                         IWL_ERR(priv, "uCode INST section is invalid at "
1934                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1935                                   save_len - len, val, le32_to_cpu(*image));
1936                         rc = -EIO;
1937                         errcnt++;
1938                         if (errcnt >= 20)
1939                                 break;
1940                 }
1941         }
1942
1943
1944         if (!errcnt)
1945                 IWL_DEBUG_INFO(priv,
1946                         "ucode image in INSTRUCTION memory is good\n");
1947
1948         return rc;
1949 }
1950
1951
1952 /**
1953  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1954  *   using sample data 100 bytes apart.  If these sample points are good,
1955  *   it's a pretty good bet that everything between them is good, too.
1956  */
1957 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1958 {
1959         u32 val;
1960         int rc = 0;
1961         u32 errcnt = 0;
1962         u32 i;
1963
1964         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1965
1966         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1967                 /* read data comes through single port, auto-incr addr */
1968                 /* NOTE: Use the debugless read so we don't flood kernel log
1969                  * if IWL_DL_IO is set */
1970                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1971                         i + IWL39_RTC_INST_LOWER_BOUND);
1972                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1973                 if (val != le32_to_cpu(*image)) {
1974 #if 0 /* Enable this if you want to see details */
1975                         IWL_ERR(priv, "uCode INST section is invalid at "
1976                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1977                                   i, val, *image);
1978 #endif
1979                         rc = -EIO;
1980                         errcnt++;
1981                         if (errcnt >= 3)
1982                                 break;
1983                 }
1984         }
1985
1986         return rc;
1987 }
1988
1989
1990 /**
1991  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
1992  *    and verify its contents
1993  */
1994 static int iwl3945_verify_ucode(struct iwl_priv *priv)
1995 {
1996         __le32 *image;
1997         u32 len;
1998         int rc = 0;
1999
2000         /* Try bootstrap */
2001         image = (__le32 *)priv->ucode_boot.v_addr;
2002         len = priv->ucode_boot.len;
2003         rc = iwl3945_verify_inst_sparse(priv, image, len);
2004         if (rc == 0) {
2005                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2006                 return 0;
2007         }
2008
2009         /* Try initialize */
2010         image = (__le32 *)priv->ucode_init.v_addr;
2011         len = priv->ucode_init.len;
2012         rc = iwl3945_verify_inst_sparse(priv, image, len);
2013         if (rc == 0) {
2014                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2015                 return 0;
2016         }
2017
2018         /* Try runtime/protocol */
2019         image = (__le32 *)priv->ucode_code.v_addr;
2020         len = priv->ucode_code.len;
2021         rc = iwl3945_verify_inst_sparse(priv, image, len);
2022         if (rc == 0) {
2023                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2024                 return 0;
2025         }
2026
2027         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2028
2029         /* Since nothing seems to match, show first several data entries in
2030          * instruction SRAM, so maybe visual inspection will give a clue.
2031          * Selection of bootstrap image (vs. other images) is arbitrary. */
2032         image = (__le32 *)priv->ucode_boot.v_addr;
2033         len = priv->ucode_boot.len;
2034         rc = iwl3945_verify_inst_full(priv, image, len);
2035
2036         return rc;
2037 }
2038
2039 static void iwl3945_nic_start(struct iwl_priv *priv)
2040 {
2041         /* Remove all resets to allow NIC to operate */
2042         iwl_write32(priv, CSR_RESET, 0);
2043 }
2044
2045 /**
2046  * iwl3945_read_ucode - Read uCode images from disk file.
2047  *
2048  * Copy into buffers for card to fetch via bus-mastering
2049  */
2050 static int iwl3945_read_ucode(struct iwl_priv *priv)
2051 {
2052         const struct iwl_ucode_header *ucode;
2053         int ret = -EINVAL, index;
2054         const struct firmware *ucode_raw;
2055         /* firmware file name contains uCode/driver compatibility version */
2056         const char *name_pre = priv->cfg->fw_name_pre;
2057         const unsigned int api_max = priv->cfg->ucode_api_max;
2058         const unsigned int api_min = priv->cfg->ucode_api_min;
2059         char buf[25];
2060         u8 *src;
2061         size_t len;
2062         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2063
2064         /* Ask kernel firmware_class module to get the boot firmware off disk.
2065          * request_firmware() is synchronous, file is in memory on return. */
2066         for (index = api_max; index >= api_min; index--) {
2067                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2068                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2069                 if (ret < 0) {
2070                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2071                                   buf, ret);
2072                         if (ret == -ENOENT)
2073                                 continue;
2074                         else
2075                                 goto error;
2076                 } else {
2077                         if (index < api_max)
2078                                 IWL_ERR(priv, "Loaded firmware %s, "
2079                                         "which is deprecated. "
2080                                         " Please use API v%u instead.\n",
2081                                           buf, api_max);
2082                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2083                                        "(%zd bytes) from disk\n",
2084                                        buf, ucode_raw->size);
2085                         break;
2086                 }
2087         }
2088
2089         if (ret < 0)
2090                 goto error;
2091
2092         /* Make sure that we got at least our header! */
2093         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2094                 IWL_ERR(priv, "File size way too small!\n");
2095                 ret = -EINVAL;
2096                 goto err_release;
2097         }
2098
2099         /* Data from ucode file:  header followed by uCode images */
2100         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2101
2102         priv->ucode_ver = le32_to_cpu(ucode->ver);
2103         api_ver = IWL_UCODE_API(priv->ucode_ver);
2104         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2105         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2106         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2107         init_data_size =
2108                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2109         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2110         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2111
2112         /* api_ver should match the api version forming part of the
2113          * firmware filename ... but we don't check for that and only rely
2114          * on the API version read from firmware header from here on forward */
2115
2116         if (api_ver < api_min || api_ver > api_max) {
2117                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2118                           "Driver supports v%u, firmware is v%u.\n",
2119                           api_max, api_ver);
2120                 priv->ucode_ver = 0;
2121                 ret = -EINVAL;
2122                 goto err_release;
2123         }
2124         if (api_ver != api_max)
2125                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2126                           "got %u. New firmware can be obtained "
2127                           "from http://www.intellinuxwireless.org.\n",
2128                           api_max, api_ver);
2129
2130         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2131                 IWL_UCODE_MAJOR(priv->ucode_ver),
2132                 IWL_UCODE_MINOR(priv->ucode_ver),
2133                 IWL_UCODE_API(priv->ucode_ver),
2134                 IWL_UCODE_SERIAL(priv->ucode_ver));
2135
2136         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2137                        priv->ucode_ver);
2138         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2139                        inst_size);
2140         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2141                        data_size);
2142         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2143                        init_size);
2144         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2145                        init_data_size);
2146         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2147                        boot_size);
2148
2149
2150         /* Verify size of file vs. image size info in file's header */
2151         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2152                 inst_size + data_size + init_size +
2153                 init_data_size + boot_size) {
2154
2155                 IWL_DEBUG_INFO(priv,
2156                         "uCode file size %zd does not match expected size\n",
2157                         ucode_raw->size);
2158                 ret = -EINVAL;
2159                 goto err_release;
2160         }
2161
2162         /* Verify that uCode images will fit in card's SRAM */
2163         if (inst_size > IWL39_MAX_INST_SIZE) {
2164                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2165                                inst_size);
2166                 ret = -EINVAL;
2167                 goto err_release;
2168         }
2169
2170         if (data_size > IWL39_MAX_DATA_SIZE) {
2171                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2172                                data_size);
2173                 ret = -EINVAL;
2174                 goto err_release;
2175         }
2176         if (init_size > IWL39_MAX_INST_SIZE) {
2177                 IWL_DEBUG_INFO(priv,
2178                                 "uCode init instr len %d too large to fit in\n",
2179                                 init_size);
2180                 ret = -EINVAL;
2181                 goto err_release;
2182         }
2183         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2184                 IWL_DEBUG_INFO(priv,
2185                                 "uCode init data len %d too large to fit in\n",
2186                                 init_data_size);
2187                 ret = -EINVAL;
2188                 goto err_release;
2189         }
2190         if (boot_size > IWL39_MAX_BSM_SIZE) {
2191                 IWL_DEBUG_INFO(priv,
2192                                 "uCode boot instr len %d too large to fit in\n",
2193                                 boot_size);
2194                 ret = -EINVAL;
2195                 goto err_release;
2196         }
2197
2198         /* Allocate ucode buffers for card's bus-master loading ... */
2199
2200         /* Runtime instructions and 2 copies of data:
2201          * 1) unmodified from disk
2202          * 2) backup cache for save/restore during power-downs */
2203         priv->ucode_code.len = inst_size;
2204         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2205
2206         priv->ucode_data.len = data_size;
2207         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2208
2209         priv->ucode_data_backup.len = data_size;
2210         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2211
2212         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2213             !priv->ucode_data_backup.v_addr)
2214                 goto err_pci_alloc;
2215
2216         /* Initialization instructions and data */
2217         if (init_size && init_data_size) {
2218                 priv->ucode_init.len = init_size;
2219                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2220
2221                 priv->ucode_init_data.len = init_data_size;
2222                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2223
2224                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2225                         goto err_pci_alloc;
2226         }
2227
2228         /* Bootstrap (instructions only, no data) */
2229         if (boot_size) {
2230                 priv->ucode_boot.len = boot_size;
2231                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2232
2233                 if (!priv->ucode_boot.v_addr)
2234                         goto err_pci_alloc;
2235         }
2236
2237         /* Copy images into buffers for card's bus-master reads ... */
2238
2239         /* Runtime instructions (first block of data in file) */
2240         len = inst_size;
2241         IWL_DEBUG_INFO(priv,
2242                 "Copying (but not loading) uCode instr len %zd\n", len);
2243         memcpy(priv->ucode_code.v_addr, src, len);
2244         src += len;
2245
2246         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2247                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2248
2249         /* Runtime data (2nd block)
2250          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2251         len = data_size;
2252         IWL_DEBUG_INFO(priv,
2253                 "Copying (but not loading) uCode data len %zd\n", len);
2254         memcpy(priv->ucode_data.v_addr, src, len);
2255         memcpy(priv->ucode_data_backup.v_addr, src, len);
2256         src += len;
2257
2258         /* Initialization instructions (3rd block) */
2259         if (init_size) {
2260                 len = init_size;
2261                 IWL_DEBUG_INFO(priv,
2262                         "Copying (but not loading) init instr len %zd\n", len);
2263                 memcpy(priv->ucode_init.v_addr, src, len);
2264                 src += len;
2265         }
2266
2267         /* Initialization data (4th block) */
2268         if (init_data_size) {
2269                 len = init_data_size;
2270                 IWL_DEBUG_INFO(priv,
2271                         "Copying (but not loading) init data len %zd\n", len);
2272                 memcpy(priv->ucode_init_data.v_addr, src, len);
2273                 src += len;
2274         }
2275
2276         /* Bootstrap instructions (5th block) */
2277         len = boot_size;
2278         IWL_DEBUG_INFO(priv,
2279                 "Copying (but not loading) boot instr len %zd\n", len);
2280         memcpy(priv->ucode_boot.v_addr, src, len);
2281
2282         /* We have our copies now, allow OS release its copies */
2283         release_firmware(ucode_raw);
2284         return 0;
2285
2286  err_pci_alloc:
2287         IWL_ERR(priv, "failed to allocate pci memory\n");
2288         ret = -ENOMEM;
2289         iwl3945_dealloc_ucode_pci(priv);
2290
2291  err_release:
2292         release_firmware(ucode_raw);
2293
2294  error:
2295         return ret;
2296 }
2297
2298
2299 /**
2300  * iwl3945_set_ucode_ptrs - Set uCode address location
2301  *
2302  * Tell initialization uCode where to find runtime uCode.
2303  *
2304  * BSM registers initially contain pointers to initialization uCode.
2305  * We need to replace them to load runtime uCode inst and data,
2306  * and to save runtime data when powering down.
2307  */
2308 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2309 {
2310         dma_addr_t pinst;
2311         dma_addr_t pdata;
2312
2313         /* bits 31:0 for 3945 */
2314         pinst = priv->ucode_code.p_addr;
2315         pdata = priv->ucode_data_backup.p_addr;
2316
2317         /* Tell bootstrap uCode where to find image to load */
2318         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2319         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2320         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2321                                  priv->ucode_data.len);
2322
2323         /* Inst byte count must be last to set up, bit 31 signals uCode
2324          *   that all new ptr/size info is in place */
2325         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2326                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2327
2328         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2329
2330         return 0;
2331 }
2332
2333 /**
2334  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2335  *
2336  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2337  *
2338  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2339  */
2340 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2341 {
2342         /* Check alive response for "valid" sign from uCode */
2343         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2344                 /* We had an error bringing up the hardware, so take it
2345                  * all the way back down so we can try again */
2346                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2347                 goto restart;
2348         }
2349
2350         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2351          * This is a paranoid check, because we would not have gotten the
2352          * "initialize" alive if code weren't properly loaded.  */
2353         if (iwl3945_verify_ucode(priv)) {
2354                 /* Runtime instruction load was bad;
2355                  * take it all the way back down so we can try again */
2356                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2357                 goto restart;
2358         }
2359
2360         /* Send pointers to protocol/runtime uCode image ... init code will
2361          * load and launch runtime uCode, which will send us another "Alive"
2362          * notification. */
2363         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2364         if (iwl3945_set_ucode_ptrs(priv)) {
2365                 /* Runtime instruction load won't happen;
2366                  * take it all the way back down so we can try again */
2367                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2368                 goto restart;
2369         }
2370         return;
2371
2372  restart:
2373         queue_work(priv->workqueue, &priv->restart);
2374 }
2375
2376 /**
2377  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2378  *                   from protocol/runtime uCode (initialization uCode's
2379  *                   Alive gets handled by iwl3945_init_alive_start()).
2380  */
2381 static void iwl3945_alive_start(struct iwl_priv *priv)
2382 {
2383         int thermal_spin = 0;
2384         u32 rfkill;
2385
2386         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2387
2388         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2389                 /* We had an error bringing up the hardware, so take it
2390                  * all the way back down so we can try again */
2391                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2392                 goto restart;
2393         }
2394
2395         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2396          * This is a paranoid check, because we would not have gotten the
2397          * "runtime" alive if code weren't properly loaded.  */
2398         if (iwl3945_verify_ucode(priv)) {
2399                 /* Runtime instruction load was bad;
2400                  * take it all the way back down so we can try again */
2401                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2402                 goto restart;
2403         }
2404
2405         iwl_clear_stations_table(priv);
2406
2407         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2408         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2409
2410         if (rfkill & 0x1) {
2411                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2412                 /* if RFKILL is not on, then wait for thermal
2413                  * sensor in adapter to kick in */
2414                 while (iwl3945_hw_get_temperature(priv) == 0) {
2415                         thermal_spin++;
2416                         udelay(10);
2417                 }
2418
2419                 if (thermal_spin)
2420                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2421                                        thermal_spin * 10);
2422         } else
2423                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2424
2425         /* After the ALIVE response, we can send commands to 3945 uCode */
2426         set_bit(STATUS_ALIVE, &priv->status);
2427
2428         if (iwl_is_rfkill(priv))
2429                 return;
2430
2431         ieee80211_wake_queues(priv->hw);
2432
2433         priv->active_rate = priv->rates_mask;
2434         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2435
2436         iwl_power_update_mode(priv, false);
2437
2438         if (iwl_is_associated(priv)) {
2439                 struct iwl3945_rxon_cmd *active_rxon =
2440                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2441
2442                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2443                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2444         } else {
2445                 /* Initialize our rx_config data */
2446                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2447         }
2448
2449         /* Configure Bluetooth device coexistence support */
2450         iwl_send_bt_config(priv);
2451
2452         /* Configure the adapter for unassociated operation */
2453         iwlcore_commit_rxon(priv);
2454
2455         iwl3945_reg_txpower_periodic(priv);
2456
2457         iwl3945_led_register(priv);
2458
2459         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2460         set_bit(STATUS_READY, &priv->status);
2461         wake_up_interruptible(&priv->wait_command_queue);
2462
2463         /* reassociate for ADHOC mode */
2464         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2465                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2466                                                                 priv->vif);
2467                 if (beacon)
2468                         iwl_mac_beacon_update(priv->hw, beacon);
2469         }
2470
2471         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2472                 iwl_set_mode(priv, priv->iw_mode);
2473
2474         return;
2475
2476  restart:
2477         queue_work(priv->workqueue, &priv->restart);
2478 }
2479
2480 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2481
2482 static void __iwl3945_down(struct iwl_priv *priv)
2483 {
2484         unsigned long flags;
2485         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2486         struct ieee80211_conf *conf = NULL;
2487
2488         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2489
2490         conf = ieee80211_get_hw_conf(priv->hw);
2491
2492         if (!exit_pending)
2493                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2494
2495         iwl3945_led_unregister(priv);
2496         iwl_clear_stations_table(priv);
2497
2498         /* Unblock any waiting calls */
2499         wake_up_interruptible_all(&priv->wait_command_queue);
2500
2501         /* Wipe out the EXIT_PENDING status bit if we are not actually
2502          * exiting the module */
2503         if (!exit_pending)
2504                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2505
2506         /* stop and reset the on-board processor */
2507         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2508
2509         /* tell the device to stop sending interrupts */
2510         spin_lock_irqsave(&priv->lock, flags);
2511         iwl_disable_interrupts(priv);
2512         spin_unlock_irqrestore(&priv->lock, flags);
2513         iwl_synchronize_irq(priv);
2514
2515         if (priv->mac80211_registered)
2516                 ieee80211_stop_queues(priv->hw);
2517
2518         /* If we have not previously called iwl3945_init() then
2519          * clear all bits but the RF Kill bits and return */
2520         if (!iwl_is_init(priv)) {
2521                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2522                                         STATUS_RF_KILL_HW |
2523                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2524                                         STATUS_GEO_CONFIGURED |
2525                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2526                                         STATUS_EXIT_PENDING;
2527                 goto exit;
2528         }
2529
2530         /* ...otherwise clear out all the status bits but the RF Kill
2531          * bit and continue taking the NIC down. */
2532         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2533                                 STATUS_RF_KILL_HW |
2534                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2535                                 STATUS_GEO_CONFIGURED |
2536                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2537                                 STATUS_FW_ERROR |
2538                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2539                                 STATUS_EXIT_PENDING;
2540
2541         priv->cfg->ops->lib->apm_ops.reset(priv);
2542         spin_lock_irqsave(&priv->lock, flags);
2543         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2544         spin_unlock_irqrestore(&priv->lock, flags);
2545
2546         iwl3945_hw_txq_ctx_stop(priv);
2547         iwl3945_hw_rxq_stop(priv);
2548
2549         iwl_write_prph(priv, APMG_CLK_DIS_REG,
2550                                 APMG_CLK_VAL_DMA_CLK_RQT);
2551
2552         udelay(5);
2553
2554         if (exit_pending)
2555                 priv->cfg->ops->lib->apm_ops.stop(priv);
2556         else
2557                 priv->cfg->ops->lib->apm_ops.reset(priv);
2558
2559  exit:
2560         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2561
2562         if (priv->ibss_beacon)
2563                 dev_kfree_skb(priv->ibss_beacon);
2564         priv->ibss_beacon = NULL;
2565
2566         /* clear out any free frames */
2567         iwl3945_clear_free_frames(priv);
2568 }
2569
2570 static void iwl3945_down(struct iwl_priv *priv)
2571 {
2572         mutex_lock(&priv->mutex);
2573         __iwl3945_down(priv);
2574         mutex_unlock(&priv->mutex);
2575
2576         iwl3945_cancel_deferred_work(priv);
2577 }
2578
2579 #define MAX_HW_RESTARTS 5
2580
2581 static int __iwl3945_up(struct iwl_priv *priv)
2582 {
2583         int rc, i;
2584
2585         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2586                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2587                 return -EIO;
2588         }
2589
2590         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2591                 IWL_ERR(priv, "ucode not available for device bring up\n");
2592                 return -EIO;
2593         }
2594
2595         /* If platform's RF_KILL switch is NOT set to KILL */
2596         if (iwl_read32(priv, CSR_GP_CNTRL) &
2597                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2598                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2599         else {
2600                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2601                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2602                 return -ENODEV;
2603         }
2604
2605         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2606
2607         rc = iwl3945_hw_nic_init(priv);
2608         if (rc) {
2609                 IWL_ERR(priv, "Unable to int nic\n");
2610                 return rc;
2611         }
2612
2613         /* make sure rfkill handshake bits are cleared */
2614         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2615         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2616                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2617
2618         /* clear (again), then enable host interrupts */
2619         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2620         iwl_enable_interrupts(priv);
2621
2622         /* really make sure rfkill handshake bits are cleared */
2623         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2624         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2625
2626         /* Copy original ucode data image from disk into backup cache.
2627          * This will be used to initialize the on-board processor's
2628          * data SRAM for a clean start when the runtime program first loads. */
2629         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2630                priv->ucode_data.len);
2631
2632         /* We return success when we resume from suspend and rf_kill is on. */
2633         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2634                 return 0;
2635
2636         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2637
2638                 iwl_clear_stations_table(priv);
2639
2640                 /* load bootstrap state machine,
2641                  * load bootstrap program into processor's memory,
2642                  * prepare to load the "initialize" uCode */
2643                 priv->cfg->ops->lib->load_ucode(priv);
2644
2645                 if (rc) {
2646                         IWL_ERR(priv,
2647                                 "Unable to set up bootstrap uCode: %d\n", rc);
2648                         continue;
2649                 }
2650
2651                 /* start card; "initialize" will load runtime ucode */
2652                 iwl3945_nic_start(priv);
2653
2654                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2655
2656                 return 0;
2657         }
2658
2659         set_bit(STATUS_EXIT_PENDING, &priv->status);
2660         __iwl3945_down(priv);
2661         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2662
2663         /* tried to restart and config the device for as long as our
2664          * patience could withstand */
2665         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2666         return -EIO;
2667 }
2668
2669
2670 /*****************************************************************************
2671  *
2672  * Workqueue callbacks
2673  *
2674  *****************************************************************************/
2675
2676 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2677 {
2678         struct iwl_priv *priv =
2679             container_of(data, struct iwl_priv, init_alive_start.work);
2680
2681         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2682                 return;
2683
2684         mutex_lock(&priv->mutex);
2685         iwl3945_init_alive_start(priv);
2686         mutex_unlock(&priv->mutex);
2687 }
2688
2689 static void iwl3945_bg_alive_start(struct work_struct *data)
2690 {
2691         struct iwl_priv *priv =
2692             container_of(data, struct iwl_priv, alive_start.work);
2693
2694         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2695                 return;
2696
2697         mutex_lock(&priv->mutex);
2698         iwl3945_alive_start(priv);
2699         mutex_unlock(&priv->mutex);
2700 }
2701
2702 static void iwl3945_rfkill_poll(struct work_struct *data)
2703 {
2704         struct iwl_priv *priv =
2705             container_of(data, struct iwl_priv, rfkill_poll.work);
2706
2707         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2708                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2709         else
2710                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2711
2712         wiphy_rfkill_set_hw_state(priv->hw->wiphy,
2713                         test_bit(STATUS_RF_KILL_HW, &priv->status));
2714
2715         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2716                            round_jiffies_relative(2 * HZ));
2717
2718 }
2719
2720 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2721 static void iwl3945_bg_request_scan(struct work_struct *data)
2722 {
2723         struct iwl_priv *priv =
2724             container_of(data, struct iwl_priv, request_scan);
2725         struct iwl_host_cmd cmd = {
2726                 .id = REPLY_SCAN_CMD,
2727                 .len = sizeof(struct iwl3945_scan_cmd),
2728                 .flags = CMD_SIZE_HUGE,
2729         };
2730         int rc = 0;
2731         struct iwl3945_scan_cmd *scan;
2732         struct ieee80211_conf *conf = NULL;
2733         u8 n_probes = 0;
2734         enum ieee80211_band band;
2735         bool is_active = false;
2736
2737         conf = ieee80211_get_hw_conf(priv->hw);
2738
2739         mutex_lock(&priv->mutex);
2740
2741         cancel_delayed_work(&priv->scan_check);
2742
2743         if (!iwl_is_ready(priv)) {
2744                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2745                 goto done;
2746         }
2747
2748         /* Make sure the scan wasn't canceled before this queued work
2749          * was given the chance to run... */
2750         if (!test_bit(STATUS_SCANNING, &priv->status))
2751                 goto done;
2752
2753         /* This should never be called or scheduled if there is currently
2754          * a scan active in the hardware. */
2755         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2756                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2757                                 "Ignoring second request.\n");
2758                 rc = -EIO;
2759                 goto done;
2760         }
2761
2762         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2763                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2764                 goto done;
2765         }
2766
2767         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2768                 IWL_DEBUG_HC(priv,
2769                         "Scan request while abort pending. Queuing.\n");
2770                 goto done;
2771         }
2772
2773         if (iwl_is_rfkill(priv)) {
2774                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2775                 goto done;
2776         }
2777
2778         if (!test_bit(STATUS_READY, &priv->status)) {
2779                 IWL_DEBUG_HC(priv,
2780                         "Scan request while uninitialized. Queuing.\n");
2781                 goto done;
2782         }
2783
2784         if (!priv->scan_bands) {
2785                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2786                 goto done;
2787         }
2788
2789         if (!priv->scan) {
2790                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2791                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2792                 if (!priv->scan) {
2793                         rc = -ENOMEM;
2794                         goto done;
2795                 }
2796         }
2797         scan = priv->scan;
2798         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2799
2800         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2801         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2802
2803         if (iwl_is_associated(priv)) {
2804                 u16 interval = 0;
2805                 u32 extra;
2806                 u32 suspend_time = 100;
2807                 u32 scan_suspend_time = 100;
2808                 unsigned long flags;
2809
2810                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2811
2812                 spin_lock_irqsave(&priv->lock, flags);
2813                 interval = priv->beacon_int;
2814                 spin_unlock_irqrestore(&priv->lock, flags);
2815
2816                 scan->suspend_time = 0;
2817                 scan->max_out_time = cpu_to_le32(200 * 1024);
2818                 if (!interval)
2819                         interval = suspend_time;
2820                 /*
2821                  * suspend time format:
2822                  *  0-19: beacon interval in usec (time before exec.)
2823                  * 20-23: 0
2824                  * 24-31: number of beacons (suspend between channels)
2825                  */
2826
2827                 extra = (suspend_time / interval) << 24;
2828                 scan_suspend_time = 0xFF0FFFFF &
2829                     (extra | ((suspend_time % interval) * 1024));
2830
2831                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2832                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2833                                scan_suspend_time, interval);
2834         }
2835
2836         if (priv->scan_request->n_ssids) {
2837                 int i, p = 0;
2838                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2839                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2840                         /* always does wildcard anyway */
2841                         if (!priv->scan_request->ssids[i].ssid_len)
2842                                 continue;
2843                         scan->direct_scan[p].id = WLAN_EID_SSID;
2844                         scan->direct_scan[p].len =
2845                                 priv->scan_request->ssids[i].ssid_len;
2846                         memcpy(scan->direct_scan[p].ssid,
2847                                priv->scan_request->ssids[i].ssid,
2848                                priv->scan_request->ssids[i].ssid_len);
2849                         n_probes++;
2850                         p++;
2851                 }
2852                 is_active = true;
2853         } else
2854                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2855
2856         /* We don't build a direct scan probe request; the uCode will do
2857          * that based on the direct_mask added to each channel entry */
2858         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2859         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2860         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2861
2862         /* flags + rate selection */
2863
2864         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2865                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2866                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2867                 scan->good_CRC_th = 0;
2868                 band = IEEE80211_BAND_2GHZ;
2869         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2870                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2871                 /*
2872                  * If active scaning is requested but a certain channel
2873                  * is marked passive, we can do active scanning if we
2874                  * detect transmissions.
2875                  */
2876                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2877                 band = IEEE80211_BAND_5GHZ;
2878         } else {
2879                 IWL_WARN(priv, "Invalid scan band count\n");
2880                 goto done;
2881         }
2882
2883         scan->tx_cmd.len = cpu_to_le16(
2884                         iwl_fill_probe_req(priv,
2885                                 (struct ieee80211_mgmt *)scan->data,
2886                                 priv->scan_request->ie,
2887                                 priv->scan_request->ie_len,
2888                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2889
2890         /* select Rx antennas */
2891         scan->flags |= iwl3945_get_antenna_flags(priv);
2892
2893         if (iwl_is_monitor_mode(priv))
2894                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2895
2896         scan->channel_count =
2897                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2898                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
2899
2900         if (scan->channel_count == 0) {
2901                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2902                 goto done;
2903         }
2904
2905         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2906             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2907         cmd.data = scan;
2908         scan->len = cpu_to_le16(cmd.len);
2909
2910         set_bit(STATUS_SCAN_HW, &priv->status);
2911         rc = iwl_send_cmd_sync(priv, &cmd);
2912         if (rc)
2913                 goto done;
2914
2915         queue_delayed_work(priv->workqueue, &priv->scan_check,
2916                            IWL_SCAN_CHECK_WATCHDOG);
2917
2918         mutex_unlock(&priv->mutex);
2919         return;
2920
2921  done:
2922         /* can not perform scan make sure we clear scanning
2923          * bits from status so next scan request can be performed.
2924          * if we dont clear scanning status bit here all next scan
2925          * will fail
2926         */
2927         clear_bit(STATUS_SCAN_HW, &priv->status);
2928         clear_bit(STATUS_SCANNING, &priv->status);
2929
2930         /* inform mac80211 scan aborted */
2931         queue_work(priv->workqueue, &priv->scan_completed);
2932         mutex_unlock(&priv->mutex);
2933 }
2934
2935 static void iwl3945_bg_up(struct work_struct *data)
2936 {
2937         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2938
2939         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2940                 return;
2941
2942         mutex_lock(&priv->mutex);
2943         __iwl3945_up(priv);
2944         mutex_unlock(&priv->mutex);
2945 }
2946
2947 static void iwl3945_bg_restart(struct work_struct *data)
2948 {
2949         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2950
2951         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2952                 return;
2953
2954         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2955                 mutex_lock(&priv->mutex);
2956                 priv->vif = NULL;
2957                 priv->is_open = 0;
2958                 mutex_unlock(&priv->mutex);
2959                 iwl3945_down(priv);
2960                 ieee80211_restart_hw(priv->hw);
2961         } else {
2962                 iwl3945_down(priv);
2963                 queue_work(priv->workqueue, &priv->up);
2964         }
2965 }
2966
2967 static void iwl3945_bg_rx_replenish(struct work_struct *data)
2968 {
2969         struct iwl_priv *priv =
2970             container_of(data, struct iwl_priv, rx_replenish);
2971
2972         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2973                 return;
2974
2975         mutex_lock(&priv->mutex);
2976         iwl3945_rx_replenish(priv);
2977         mutex_unlock(&priv->mutex);
2978 }
2979
2980 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2981
2982 void iwl3945_post_associate(struct iwl_priv *priv)
2983 {
2984         int rc = 0;
2985         struct ieee80211_conf *conf = NULL;
2986
2987         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2988                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2989                 return;
2990         }
2991
2992
2993         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2994                         priv->assoc_id, priv->active_rxon.bssid_addr);
2995
2996         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2997                 return;
2998
2999         if (!priv->vif || !priv->is_open)
3000                 return;
3001
3002         iwl_scan_cancel_timeout(priv, 200);
3003
3004         conf = ieee80211_get_hw_conf(priv->hw);
3005
3006         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3007         iwlcore_commit_rxon(priv);
3008
3009         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3010         iwl_setup_rxon_timing(priv);
3011         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3012                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3013         if (rc)
3014                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3015                             "Attempting to continue.\n");
3016
3017         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3018
3019         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3020
3021         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3022                         priv->assoc_id, priv->beacon_int);
3023
3024         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3025                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3026         else
3027                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3028
3029         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3030                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3031                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3032                 else
3033                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3034
3035                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3036                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3037
3038         }
3039
3040         iwlcore_commit_rxon(priv);
3041
3042         switch (priv->iw_mode) {
3043         case NL80211_IFTYPE_STATION:
3044                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3045                 break;
3046
3047         case NL80211_IFTYPE_ADHOC:
3048
3049                 priv->assoc_id = 1;
3050                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3051                 iwl3945_sync_sta(priv, IWL_STA_ID,
3052                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3053                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3054                                  CMD_ASYNC);
3055                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3056                 iwl3945_send_beacon_cmd(priv);
3057
3058                 break;
3059
3060         default:
3061                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3062                            __func__, priv->iw_mode);
3063                 break;
3064         }
3065
3066         iwl_activate_qos(priv, 0);
3067
3068         /* we have just associated, don't start scan too early */
3069         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3070 }
3071
3072 /*****************************************************************************
3073  *
3074  * mac80211 entry point functions
3075  *
3076  *****************************************************************************/
3077
3078 #define UCODE_READY_TIMEOUT     (2 * HZ)
3079
3080 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3081 {
3082         struct iwl_priv *priv = hw->priv;
3083         int ret;
3084
3085         IWL_DEBUG_MAC80211(priv, "enter\n");
3086
3087         /* we should be verifying the device is ready to be opened */
3088         mutex_lock(&priv->mutex);
3089
3090         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3091          * ucode filename and max sizes are card-specific. */
3092
3093         if (!priv->ucode_code.len) {
3094                 ret = iwl3945_read_ucode(priv);
3095                 if (ret) {
3096                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3097                         mutex_unlock(&priv->mutex);
3098                         goto out_release_irq;
3099                 }
3100         }
3101
3102         ret = __iwl3945_up(priv);
3103
3104         mutex_unlock(&priv->mutex);
3105
3106         if (ret)
3107                 goto out_release_irq;
3108
3109         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3110
3111         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3112          * mac80211 will not be run successfully. */
3113         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3114                         test_bit(STATUS_READY, &priv->status),
3115                         UCODE_READY_TIMEOUT);
3116         if (!ret) {
3117                 if (!test_bit(STATUS_READY, &priv->status)) {
3118                         IWL_ERR(priv,
3119                                 "Wait for START_ALIVE timeout after %dms.\n",
3120                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3121                         ret = -ETIMEDOUT;
3122                         goto out_release_irq;
3123                 }
3124         }
3125
3126         /* ucode is running and will send rfkill notifications,
3127          * no need to poll the killswitch state anymore */
3128         cancel_delayed_work(&priv->rfkill_poll);
3129
3130         priv->is_open = 1;
3131         IWL_DEBUG_MAC80211(priv, "leave\n");
3132         return 0;
3133
3134 out_release_irq:
3135         priv->is_open = 0;
3136         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3137         return ret;
3138 }
3139
3140 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3141 {
3142         struct iwl_priv *priv = hw->priv;
3143
3144         IWL_DEBUG_MAC80211(priv, "enter\n");
3145
3146         if (!priv->is_open) {
3147                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3148                 return;
3149         }
3150
3151         priv->is_open = 0;
3152
3153         if (iwl_is_ready_rf(priv)) {
3154                 /* stop mac, cancel any scan request and clear
3155                  * RXON_FILTER_ASSOC_MSK BIT
3156                  */
3157                 mutex_lock(&priv->mutex);
3158                 iwl_scan_cancel_timeout(priv, 100);
3159                 mutex_unlock(&priv->mutex);
3160         }
3161
3162         iwl3945_down(priv);
3163
3164         flush_workqueue(priv->workqueue);
3165
3166         /* start polling the killswitch state again */
3167         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3168                            round_jiffies_relative(2 * HZ));
3169
3170         IWL_DEBUG_MAC80211(priv, "leave\n");
3171 }
3172
3173 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3174 {
3175         struct iwl_priv *priv = hw->priv;
3176
3177         IWL_DEBUG_MAC80211(priv, "enter\n");
3178
3179         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3180                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3181
3182         if (iwl3945_tx_skb(priv, skb))
3183                 dev_kfree_skb_any(skb);
3184
3185         IWL_DEBUG_MAC80211(priv, "leave\n");
3186         return NETDEV_TX_OK;
3187 }
3188
3189 void iwl3945_config_ap(struct iwl_priv *priv)
3190 {
3191         int rc = 0;
3192
3193         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3194                 return;
3195
3196         /* The following should be done only at AP bring up */
3197         if (!(iwl_is_associated(priv))) {
3198
3199                 /* RXON - unassoc (to set timing command) */
3200                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3201                 iwlcore_commit_rxon(priv);
3202
3203                 /* RXON Timing */
3204                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3205                 iwl_setup_rxon_timing(priv);
3206                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3207                                       sizeof(priv->rxon_timing),
3208                                       &priv->rxon_timing);
3209                 if (rc)
3210                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3211                                         "Attempting to continue.\n");
3212
3213                 /* FIXME: what should be the assoc_id for AP? */
3214                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3215                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3216                         priv->staging_rxon.flags |=
3217                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3218                 else
3219                         priv->staging_rxon.flags &=
3220                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3221
3222                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3223                         if (priv->assoc_capability &
3224                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3225                                 priv->staging_rxon.flags |=
3226                                         RXON_FLG_SHORT_SLOT_MSK;
3227                         else
3228                                 priv->staging_rxon.flags &=
3229                                         ~RXON_FLG_SHORT_SLOT_MSK;
3230
3231                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3232                                 priv->staging_rxon.flags &=
3233                                         ~RXON_FLG_SHORT_SLOT_MSK;
3234                 }
3235                 /* restore RXON assoc */
3236                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3237                 iwlcore_commit_rxon(priv);
3238                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3239         }
3240         iwl3945_send_beacon_cmd(priv);
3241
3242         /* FIXME - we need to add code here to detect a totally new
3243          * configuration, reset the AP, unassoc, rxon timing, assoc,
3244          * clear sta table, add BCAST sta... */
3245 }
3246
3247 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3248                                struct ieee80211_vif *vif,
3249                                struct ieee80211_sta *sta,
3250                                struct ieee80211_key_conf *key)
3251 {
3252         struct iwl_priv *priv = hw->priv;
3253         const u8 *addr;
3254         int ret = 0;
3255         u8 sta_id = IWL_INVALID_STATION;
3256         u8 static_key;
3257
3258         IWL_DEBUG_MAC80211(priv, "enter\n");
3259
3260         if (iwl3945_mod_params.sw_crypto) {
3261                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3262                 return -EOPNOTSUPP;
3263         }
3264
3265         addr = sta ? sta->addr : iwl_bcast_addr;
3266         static_key = !iwl_is_associated(priv);
3267
3268         if (!static_key) {
3269                 sta_id = iwl_find_station(priv, addr);
3270                 if (sta_id == IWL_INVALID_STATION) {
3271                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3272                                             addr);
3273                         return -EINVAL;
3274                 }
3275         }
3276
3277         mutex_lock(&priv->mutex);
3278         iwl_scan_cancel_timeout(priv, 100);
3279         mutex_unlock(&priv->mutex);
3280
3281         switch (cmd) {
3282         case SET_KEY:
3283                 if (static_key)
3284                         ret = iwl3945_set_static_key(priv, key);
3285                 else
3286                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3287                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3288                 break;
3289         case DISABLE_KEY:
3290                 if (static_key)
3291                         ret = iwl3945_remove_static_key(priv);
3292                 else
3293                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3294                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3295                 break;
3296         default:
3297                 ret = -EINVAL;
3298         }
3299
3300         IWL_DEBUG_MAC80211(priv, "leave\n");
3301
3302         return ret;
3303 }
3304
3305 /*****************************************************************************
3306  *
3307  * sysfs attributes
3308  *
3309  *****************************************************************************/
3310
3311 #ifdef CONFIG_IWLWIFI_DEBUG
3312
3313 /*
3314  * The following adds a new attribute to the sysfs representation
3315  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3316  * used for controlling the debug level.
3317  *
3318  * See the level definitions in iwl for details.
3319  *
3320  * The debug_level being managed using sysfs below is a per device debug
3321  * level that is used instead of the global debug level if it (the per
3322  * device debug level) is set.
3323  */
3324 static ssize_t show_debug_level(struct device *d,
3325                                 struct device_attribute *attr, char *buf)
3326 {
3327         struct iwl_priv *priv = dev_get_drvdata(d);
3328         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3329 }
3330 static ssize_t store_debug_level(struct device *d,
3331                                 struct device_attribute *attr,
3332                                  const char *buf, size_t count)
3333 {
3334         struct iwl_priv *priv = dev_get_drvdata(d);
3335         unsigned long val;
3336         int ret;
3337
3338         ret = strict_strtoul(buf, 0, &val);
3339         if (ret)
3340                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3341         else {
3342                 priv->debug_level = val;
3343                 if (iwl_alloc_traffic_mem(priv))
3344                         IWL_ERR(priv,
3345                                 "Not enough memory to generate traffic log\n");
3346         }
3347         return strnlen(buf, count);
3348 }
3349
3350 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3351                         show_debug_level, store_debug_level);
3352
3353 #endif /* CONFIG_IWLWIFI_DEBUG */
3354
3355 static ssize_t show_temperature(struct device *d,
3356                                 struct device_attribute *attr, char *buf)
3357 {
3358         struct iwl_priv *priv = dev_get_drvdata(d);
3359
3360         if (!iwl_is_alive(priv))
3361                 return -EAGAIN;
3362
3363         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3364 }
3365
3366 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3367
3368 static ssize_t show_tx_power(struct device *d,
3369                              struct device_attribute *attr, char *buf)
3370 {
3371         struct iwl_priv *priv = dev_get_drvdata(d);
3372         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3373 }
3374
3375 static ssize_t store_tx_power(struct device *d,
3376                               struct device_attribute *attr,
3377                               const char *buf, size_t count)
3378 {
3379         struct iwl_priv *priv = dev_get_drvdata(d);
3380         char *p = (char *)buf;
3381         u32 val;
3382
3383         val = simple_strtoul(p, &p, 10);
3384         if (p == buf)
3385                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3386         else
3387                 iwl3945_hw_reg_set_txpower(priv, val);
3388
3389         return count;
3390 }
3391
3392 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3393
3394 static ssize_t show_flags(struct device *d,
3395                           struct device_attribute *attr, char *buf)
3396 {
3397         struct iwl_priv *priv = dev_get_drvdata(d);
3398
3399         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3400 }
3401
3402 static ssize_t store_flags(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         u32 flags = simple_strtoul(buf, NULL, 0);
3408
3409         mutex_lock(&priv->mutex);
3410         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3411                 /* Cancel any currently running scans... */
3412                 if (iwl_scan_cancel_timeout(priv, 100))
3413                         IWL_WARN(priv, "Could not cancel scan.\n");
3414                 else {
3415                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3416                                        flags);
3417                         priv->staging_rxon.flags = cpu_to_le32(flags);
3418                         iwlcore_commit_rxon(priv);
3419                 }
3420         }
3421         mutex_unlock(&priv->mutex);
3422
3423         return count;
3424 }
3425
3426 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3427
3428 static ssize_t show_filter_flags(struct device *d,
3429                                  struct device_attribute *attr, char *buf)
3430 {
3431         struct iwl_priv *priv = dev_get_drvdata(d);
3432
3433         return sprintf(buf, "0x%04X\n",
3434                 le32_to_cpu(priv->active_rxon.filter_flags));
3435 }
3436
3437 static ssize_t store_filter_flags(struct device *d,
3438                                   struct device_attribute *attr,
3439                                   const char *buf, size_t count)
3440 {
3441         struct iwl_priv *priv = dev_get_drvdata(d);
3442         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3443
3444         mutex_lock(&priv->mutex);
3445         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3446                 /* Cancel any currently running scans... */
3447                 if (iwl_scan_cancel_timeout(priv, 100))
3448                         IWL_WARN(priv, "Could not cancel scan.\n");
3449                 else {
3450                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3451                                        "0x%04X\n", filter_flags);
3452                         priv->staging_rxon.filter_flags =
3453                                 cpu_to_le32(filter_flags);
3454                         iwlcore_commit_rxon(priv);
3455                 }
3456         }
3457         mutex_unlock(&priv->mutex);
3458
3459         return count;
3460 }
3461
3462 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3463                    store_filter_flags);
3464
3465 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3466
3467 static ssize_t show_measurement(struct device *d,
3468                                 struct device_attribute *attr, char *buf)
3469 {
3470         struct iwl_priv *priv = dev_get_drvdata(d);
3471         struct iwl_spectrum_notification measure_report;
3472         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3473         u8 *data = (u8 *)&measure_report;
3474         unsigned long flags;
3475
3476         spin_lock_irqsave(&priv->lock, flags);
3477         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3478                 spin_unlock_irqrestore(&priv->lock, flags);
3479                 return 0;
3480         }
3481         memcpy(&measure_report, &priv->measure_report, size);
3482         priv->measurement_status = 0;
3483         spin_unlock_irqrestore(&priv->lock, flags);
3484
3485         while (size && (PAGE_SIZE - len)) {
3486                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3487                                    PAGE_SIZE - len, 1);
3488                 len = strlen(buf);
3489                 if (PAGE_SIZE - len)
3490                         buf[len++] = '\n';
3491
3492                 ofs += 16;
3493                 size -= min(size, 16U);
3494         }
3495
3496         return len;
3497 }
3498
3499 static ssize_t store_measurement(struct device *d,
3500                                  struct device_attribute *attr,
3501                                  const char *buf, size_t count)
3502 {
3503         struct iwl_priv *priv = dev_get_drvdata(d);
3504         struct ieee80211_measurement_params params = {
3505                 .channel = le16_to_cpu(priv->active_rxon.channel),
3506                 .start_time = cpu_to_le64(priv->last_tsf),
3507                 .duration = cpu_to_le16(1),
3508         };
3509         u8 type = IWL_MEASURE_BASIC;
3510         u8 buffer[32];
3511         u8 channel;
3512
3513         if (count) {
3514                 char *p = buffer;
3515                 strncpy(buffer, buf, min(sizeof(buffer), count));
3516                 channel = simple_strtoul(p, NULL, 0);
3517                 if (channel)
3518                         params.channel = channel;
3519
3520                 p = buffer;
3521                 while (*p && *p != ' ')
3522                         p++;
3523                 if (*p)
3524                         type = simple_strtoul(p + 1, NULL, 0);
3525         }
3526
3527         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3528                        "channel %d (for '%s')\n", type, params.channel, buf);
3529         iwl3945_get_measurement(priv, &params, type);
3530
3531         return count;
3532 }
3533
3534 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3535                    show_measurement, store_measurement);
3536 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3537
3538 static ssize_t store_retry_rate(struct device *d,
3539                                 struct device_attribute *attr,
3540                                 const char *buf, size_t count)
3541 {
3542         struct iwl_priv *priv = dev_get_drvdata(d);
3543
3544         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3545         if (priv->retry_rate <= 0)
3546                 priv->retry_rate = 1;
3547
3548         return count;
3549 }
3550
3551 static ssize_t show_retry_rate(struct device *d,
3552                                struct device_attribute *attr, char *buf)
3553 {
3554         struct iwl_priv *priv = dev_get_drvdata(d);
3555         return sprintf(buf, "%d", priv->retry_rate);
3556 }
3557
3558 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3559                    store_retry_rate);
3560
3561
3562 static ssize_t show_channels(struct device *d,
3563                              struct device_attribute *attr, char *buf)
3564 {
3565         /* all this shit doesn't belong into sysfs anyway */
3566         return 0;
3567 }
3568
3569 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3570
3571 static ssize_t show_statistics(struct device *d,
3572                                struct device_attribute *attr, char *buf)
3573 {
3574         struct iwl_priv *priv = dev_get_drvdata(d);
3575         u32 size = sizeof(struct iwl3945_notif_statistics);
3576         u32 len = 0, ofs = 0;
3577         u8 *data = (u8 *)&priv->statistics_39;
3578         int rc = 0;
3579
3580         if (!iwl_is_alive(priv))
3581                 return -EAGAIN;
3582
3583         mutex_lock(&priv->mutex);
3584         rc = iwl_send_statistics_request(priv, 0);
3585         mutex_unlock(&priv->mutex);
3586
3587         if (rc) {
3588                 len = sprintf(buf,
3589                               "Error sending statistics request: 0x%08X\n", rc);
3590                 return len;
3591         }
3592
3593         while (size && (PAGE_SIZE - len)) {
3594                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3595                                    PAGE_SIZE - len, 1);
3596                 len = strlen(buf);
3597                 if (PAGE_SIZE - len)
3598                         buf[len++] = '\n';
3599
3600                 ofs += 16;
3601                 size -= min(size, 16U);
3602         }
3603
3604         return len;
3605 }
3606
3607 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3608
3609 static ssize_t show_antenna(struct device *d,
3610                             struct device_attribute *attr, char *buf)
3611 {
3612         struct iwl_priv *priv = dev_get_drvdata(d);
3613
3614         if (!iwl_is_alive(priv))
3615                 return -EAGAIN;
3616
3617         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3618 }
3619
3620 static ssize_t store_antenna(struct device *d,
3621                              struct device_attribute *attr,
3622                              const char *buf, size_t count)
3623 {
3624         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3625         int ant;
3626
3627         if (count == 0)
3628                 return 0;
3629
3630         if (sscanf(buf, "%1i", &ant) != 1) {
3631                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3632                 return count;
3633         }
3634
3635         if ((ant >= 0) && (ant <= 2)) {
3636                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3637                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3638         } else
3639                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3640
3641
3642         return count;
3643 }
3644
3645 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3646
3647 static ssize_t show_status(struct device *d,
3648                            struct device_attribute *attr, char *buf)
3649 {
3650         struct iwl_priv *priv = dev_get_drvdata(d);
3651         if (!iwl_is_alive(priv))
3652                 return -EAGAIN;
3653         return sprintf(buf, "0x%08x\n", (int)priv->status);
3654 }
3655
3656 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3657
3658 static ssize_t dump_error_log(struct device *d,
3659                               struct device_attribute *attr,
3660                               const char *buf, size_t count)
3661 {
3662         struct iwl_priv *priv = dev_get_drvdata(d);
3663         char *p = (char *)buf;
3664
3665         if (p[0] == '1')
3666                 iwl3945_dump_nic_error_log(priv);
3667
3668         return strnlen(buf, count);
3669 }
3670
3671 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3672
3673 static ssize_t dump_event_log(struct device *d,
3674                               struct device_attribute *attr,
3675                               const char *buf, size_t count)
3676 {
3677         struct iwl_priv *priv = dev_get_drvdata(d);
3678         char *p = (char *)buf;
3679
3680         if (p[0] == '1')
3681                 iwl3945_dump_nic_event_log(priv);
3682
3683         return strnlen(buf, count);
3684 }
3685
3686 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
3687
3688 /*****************************************************************************
3689  *
3690  * driver setup and tear down
3691  *
3692  *****************************************************************************/
3693
3694 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3695 {
3696         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3697
3698         init_waitqueue_head(&priv->wait_command_queue);
3699
3700         INIT_WORK(&priv->up, iwl3945_bg_up);
3701         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3702         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3703         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3704         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3705         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3706         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3707         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3708         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3709         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3710         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3711
3712         iwl3945_hw_setup_deferred_work(priv);
3713
3714         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3715                      iwl3945_irq_tasklet, (unsigned long)priv);
3716 }
3717
3718 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3719 {
3720         iwl3945_hw_cancel_deferred_work(priv);
3721
3722         cancel_delayed_work_sync(&priv->init_alive_start);
3723         cancel_delayed_work(&priv->scan_check);
3724         cancel_delayed_work(&priv->alive_start);
3725         cancel_work_sync(&priv->beacon_update);
3726 }
3727
3728 static struct attribute *iwl3945_sysfs_entries[] = {
3729         &dev_attr_antenna.attr,
3730         &dev_attr_channels.attr,
3731         &dev_attr_dump_errors.attr,
3732         &dev_attr_dump_events.attr,
3733         &dev_attr_flags.attr,
3734         &dev_attr_filter_flags.attr,
3735 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3736         &dev_attr_measurement.attr,
3737 #endif
3738         &dev_attr_retry_rate.attr,
3739         &dev_attr_statistics.attr,
3740         &dev_attr_status.attr,
3741         &dev_attr_temperature.attr,
3742         &dev_attr_tx_power.attr,
3743 #ifdef CONFIG_IWLWIFI_DEBUG
3744         &dev_attr_debug_level.attr,
3745 #endif
3746         NULL
3747 };
3748
3749 static struct attribute_group iwl3945_attribute_group = {
3750         .name = NULL,           /* put in device directory */
3751         .attrs = iwl3945_sysfs_entries,
3752 };
3753
3754 static struct ieee80211_ops iwl3945_hw_ops = {
3755         .tx = iwl3945_mac_tx,
3756         .start = iwl3945_mac_start,
3757         .stop = iwl3945_mac_stop,
3758         .add_interface = iwl_mac_add_interface,
3759         .remove_interface = iwl_mac_remove_interface,
3760         .config = iwl_mac_config,
3761         .configure_filter = iwl_configure_filter,
3762         .set_key = iwl3945_mac_set_key,
3763         .get_tx_stats = iwl_mac_get_tx_stats,
3764         .conf_tx = iwl_mac_conf_tx,
3765         .reset_tsf = iwl_mac_reset_tsf,
3766         .bss_info_changed = iwl_bss_info_changed,
3767         .hw_scan = iwl_mac_hw_scan
3768 };
3769
3770 static int iwl3945_init_drv(struct iwl_priv *priv)
3771 {
3772         int ret;
3773         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3774
3775         priv->retry_rate = 1;
3776         priv->ibss_beacon = NULL;
3777
3778         spin_lock_init(&priv->lock);
3779         spin_lock_init(&priv->sta_lock);
3780         spin_lock_init(&priv->hcmd_lock);
3781
3782         INIT_LIST_HEAD(&priv->free_frames);
3783
3784         mutex_init(&priv->mutex);
3785
3786         /* Clear the driver's (not device's) station table */
3787         iwl_clear_stations_table(priv);
3788
3789         priv->data_retry_limit = -1;
3790         priv->ieee_channels = NULL;
3791         priv->ieee_rates = NULL;
3792         priv->band = IEEE80211_BAND_2GHZ;
3793
3794         priv->iw_mode = NL80211_IFTYPE_STATION;
3795
3796         iwl_reset_qos(priv);
3797
3798         priv->qos_data.qos_active = 0;
3799         priv->qos_data.qos_cap.val = 0;
3800
3801         priv->rates_mask = IWL_RATES_MASK;
3802         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3803
3804         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3805                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3806                          eeprom->version);
3807                 ret = -EINVAL;
3808                 goto err;
3809         }
3810         ret = iwl_init_channel_map(priv);
3811         if (ret) {
3812                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3813                 goto err;
3814         }
3815
3816         /* Set up txpower settings in driver for all channels */
3817         if (iwl3945_txpower_set_from_eeprom(priv)) {
3818                 ret = -EIO;
3819                 goto err_free_channel_map;
3820         }
3821
3822         ret = iwlcore_init_geos(priv);
3823         if (ret) {
3824                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3825                 goto err_free_channel_map;
3826         }
3827         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3828
3829         return 0;
3830
3831 err_free_channel_map:
3832         iwl_free_channel_map(priv);
3833 err:
3834         return ret;
3835 }
3836
3837 static int iwl3945_setup_mac(struct iwl_priv *priv)
3838 {
3839         int ret;
3840         struct ieee80211_hw *hw = priv->hw;
3841
3842         hw->rate_control_algorithm = "iwl-3945-rs";
3843         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3844
3845         /* Tell mac80211 our characteristics */
3846         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3847                     IEEE80211_HW_NOISE_DBM |
3848                     IEEE80211_HW_SPECTRUM_MGMT |
3849                     IEEE80211_HW_SUPPORTS_PS |
3850                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3851
3852         hw->wiphy->interface_modes =
3853                 BIT(NL80211_IFTYPE_STATION) |
3854                 BIT(NL80211_IFTYPE_ADHOC);
3855
3856         hw->wiphy->custom_regulatory = true;
3857
3858         /* Firmware does not support this */
3859         hw->wiphy->disable_beacon_hints = true;
3860
3861         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3862         /* we create the 802.11 header and a zero-length SSID element */
3863         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3864
3865         /* Default value; 4 EDCA QOS priorities */
3866         hw->queues = 4;
3867
3868         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3869                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3870                         &priv->bands[IEEE80211_BAND_2GHZ];
3871
3872         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3873                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3874                         &priv->bands[IEEE80211_BAND_5GHZ];
3875
3876         ret = ieee80211_register_hw(priv->hw);
3877         if (ret) {
3878                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3879                 return ret;
3880         }
3881         priv->mac80211_registered = 1;
3882
3883         return 0;
3884 }
3885
3886 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3887 {
3888         int err = 0;
3889         struct iwl_priv *priv;
3890         struct ieee80211_hw *hw;
3891         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3892         struct iwl3945_eeprom *eeprom;
3893         unsigned long flags;
3894
3895         /***********************
3896          * 1. Allocating HW data
3897          * ********************/
3898
3899         /* mac80211 allocates memory for this device instance, including
3900          *   space for this driver's private structure */
3901         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3902         if (hw == NULL) {
3903                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3904                 err = -ENOMEM;
3905                 goto out;
3906         }
3907         priv = hw->priv;
3908         SET_IEEE80211_DEV(hw, &pdev->dev);
3909
3910         /*
3911          * Disabling hardware scan means that mac80211 will perform scans
3912          * "the hard way", rather than using device's scan.
3913          */
3914         if (iwl3945_mod_params.disable_hw_scan) {
3915                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
3916                 iwl3945_hw_ops.hw_scan = NULL;
3917         }
3918
3919
3920         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3921         priv->cfg = cfg;
3922         priv->pci_dev = pdev;
3923         priv->inta_mask = CSR_INI_SET_MASK;
3924
3925 #ifdef CONFIG_IWLWIFI_DEBUG
3926         atomic_set(&priv->restrict_refcnt, 0);
3927 #endif
3928         if (iwl_alloc_traffic_mem(priv))
3929                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3930
3931         /***************************
3932          * 2. Initializing PCI bus
3933          * *************************/
3934         if (pci_enable_device(pdev)) {
3935                 err = -ENODEV;
3936                 goto out_ieee80211_free_hw;
3937         }
3938
3939         pci_set_master(pdev);
3940
3941         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3942         if (!err)
3943                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3944         if (err) {
3945                 IWL_WARN(priv, "No suitable DMA available.\n");
3946                 goto out_pci_disable_device;
3947         }
3948
3949         pci_set_drvdata(pdev, priv);
3950         err = pci_request_regions(pdev, DRV_NAME);
3951         if (err)
3952                 goto out_pci_disable_device;
3953
3954         /***********************
3955          * 3. Read REV Register
3956          * ********************/
3957         priv->hw_base = pci_iomap(pdev, 0, 0);
3958         if (!priv->hw_base) {
3959                 err = -ENODEV;
3960                 goto out_pci_release_regions;
3961         }
3962
3963         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3964                         (unsigned long long) pci_resource_len(pdev, 0));
3965         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3966
3967         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3968          * PCI Tx retries from interfering with C3 CPU state */
3969         pci_write_config_byte(pdev, 0x41, 0x00);
3970
3971         /* this spin lock will be used in apm_ops.init and EEPROM access
3972          * we should init now
3973          */
3974         spin_lock_init(&priv->reg_lock);
3975
3976         /* amp init */
3977         err = priv->cfg->ops->lib->apm_ops.init(priv);
3978         if (err < 0) {
3979                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
3980                 goto out_iounmap;
3981         }
3982
3983         /***********************
3984          * 4. Read EEPROM
3985          * ********************/
3986
3987         /* Read the EEPROM */
3988         err = iwl_eeprom_init(priv);
3989         if (err) {
3990                 IWL_ERR(priv, "Unable to init EEPROM\n");
3991                 goto out_iounmap;
3992         }
3993         /* MAC Address location in EEPROM same for 3945/4965 */
3994         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3995         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
3996         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3997         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3998
3999         /***********************
4000          * 5. Setup HW Constants
4001          * ********************/
4002         /* Device-specific setup */
4003         if (iwl3945_hw_set_hw_params(priv)) {
4004                 IWL_ERR(priv, "failed to set hw settings\n");
4005                 goto out_eeprom_free;
4006         }
4007
4008         /***********************
4009          * 6. Setup priv
4010          * ********************/
4011
4012         err = iwl3945_init_drv(priv);
4013         if (err) {
4014                 IWL_ERR(priv, "initializing driver failed\n");
4015                 goto out_unset_hw_params;
4016         }
4017
4018         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4019                 priv->cfg->name);
4020
4021         /***********************
4022          * 7. Setup Services
4023          * ********************/
4024
4025         spin_lock_irqsave(&priv->lock, flags);
4026         iwl_disable_interrupts(priv);
4027         spin_unlock_irqrestore(&priv->lock, flags);
4028
4029         pci_enable_msi(priv->pci_dev);
4030
4031         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4032                           IRQF_SHARED, DRV_NAME, priv);
4033         if (err) {
4034                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4035                 goto out_disable_msi;
4036         }
4037
4038         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4039         if (err) {
4040                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4041                 goto out_release_irq;
4042         }
4043
4044         iwl_set_rxon_channel(priv,
4045                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4046         iwl3945_setup_deferred_work(priv);
4047         iwl3945_setup_rx_handlers(priv);
4048
4049         /*********************************
4050          * 8. Setup and Register mac80211
4051          * *******************************/
4052
4053         iwl_enable_interrupts(priv);
4054
4055         err = iwl3945_setup_mac(priv);
4056         if (err)
4057                 goto  out_remove_sysfs;
4058
4059         err = iwl_dbgfs_register(priv, DRV_NAME);
4060         if (err)
4061                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4062
4063         /* Start monitoring the killswitch */
4064         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4065                            2 * HZ);
4066
4067         return 0;
4068
4069  out_remove_sysfs:
4070         destroy_workqueue(priv->workqueue);
4071         priv->workqueue = NULL;
4072         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4073  out_release_irq:
4074         free_irq(priv->pci_dev->irq, priv);
4075  out_disable_msi:
4076         pci_disable_msi(priv->pci_dev);
4077         iwlcore_free_geos(priv);
4078         iwl_free_channel_map(priv);
4079  out_unset_hw_params:
4080         iwl3945_unset_hw_params(priv);
4081  out_eeprom_free:
4082         iwl_eeprom_free(priv);
4083  out_iounmap:
4084         pci_iounmap(pdev, priv->hw_base);
4085  out_pci_release_regions:
4086         pci_release_regions(pdev);
4087  out_pci_disable_device:
4088         pci_set_drvdata(pdev, NULL);
4089         pci_disable_device(pdev);
4090  out_ieee80211_free_hw:
4091         ieee80211_free_hw(priv->hw);
4092         iwl_free_traffic_mem(priv);
4093  out:
4094         return err;
4095 }
4096
4097 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4098 {
4099         struct iwl_priv *priv = pci_get_drvdata(pdev);
4100         unsigned long flags;
4101
4102         if (!priv)
4103                 return;
4104
4105         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4106
4107         iwl_dbgfs_unregister(priv);
4108
4109         set_bit(STATUS_EXIT_PENDING, &priv->status);
4110
4111         if (priv->mac80211_registered) {
4112                 ieee80211_unregister_hw(priv->hw);
4113                 priv->mac80211_registered = 0;
4114         } else {
4115                 iwl3945_down(priv);
4116         }
4117
4118         /* make sure we flush any pending irq or
4119          * tasklet for the driver
4120          */
4121         spin_lock_irqsave(&priv->lock, flags);
4122         iwl_disable_interrupts(priv);
4123         spin_unlock_irqrestore(&priv->lock, flags);
4124
4125         iwl_synchronize_irq(priv);
4126
4127         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4128
4129         cancel_delayed_work_sync(&priv->rfkill_poll);
4130
4131         iwl3945_dealloc_ucode_pci(priv);
4132
4133         if (priv->rxq.bd)
4134                 iwl3945_rx_queue_free(priv, &priv->rxq);
4135         iwl3945_hw_txq_ctx_free(priv);
4136
4137         iwl3945_unset_hw_params(priv);
4138         iwl_clear_stations_table(priv);
4139
4140         /*netif_stop_queue(dev); */
4141         flush_workqueue(priv->workqueue);
4142
4143         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4144          * priv->workqueue... so we can't take down the workqueue
4145          * until now... */
4146         destroy_workqueue(priv->workqueue);
4147         priv->workqueue = NULL;
4148         iwl_free_traffic_mem(priv);
4149
4150         free_irq(pdev->irq, priv);
4151         pci_disable_msi(pdev);
4152
4153         pci_iounmap(pdev, priv->hw_base);
4154         pci_release_regions(pdev);
4155         pci_disable_device(pdev);
4156         pci_set_drvdata(pdev, NULL);
4157
4158         iwl_free_channel_map(priv);
4159         iwlcore_free_geos(priv);
4160         kfree(priv->scan);
4161         if (priv->ibss_beacon)
4162                 dev_kfree_skb(priv->ibss_beacon);
4163
4164         ieee80211_free_hw(priv->hw);
4165 }
4166
4167
4168 /*****************************************************************************
4169  *
4170  * driver and module entry point
4171  *
4172  *****************************************************************************/
4173
4174 static struct pci_driver iwl3945_driver = {
4175         .name = DRV_NAME,
4176         .id_table = iwl3945_hw_card_ids,
4177         .probe = iwl3945_pci_probe,
4178         .remove = __devexit_p(iwl3945_pci_remove),
4179 #ifdef CONFIG_PM
4180         .suspend = iwl_pci_suspend,
4181         .resume = iwl_pci_resume,
4182 #endif
4183 };
4184
4185 static int __init iwl3945_init(void)
4186 {
4187
4188         int ret;
4189         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4190         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4191
4192         ret = iwl3945_rate_control_register();
4193         if (ret) {
4194                 printk(KERN_ERR DRV_NAME
4195                        "Unable to register rate control algorithm: %d\n", ret);
4196                 return ret;
4197         }
4198
4199         ret = pci_register_driver(&iwl3945_driver);
4200         if (ret) {
4201                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4202                 goto error_register;
4203         }
4204
4205         return ret;
4206
4207 error_register:
4208         iwl3945_rate_control_unregister();
4209         return ret;
4210 }
4211
4212 static void __exit iwl3945_exit(void)
4213 {
4214         pci_unregister_driver(&iwl3945_driver);
4215         iwl3945_rate_control_unregister();
4216 }
4217
4218 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4219
4220 module_param_named(antenna, iwl3945_mod_params.antenna, int, 0444);
4221 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4222 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, 0444);
4223 MODULE_PARM_DESC(swcrypto,
4224                  "using software crypto (default 1 [software])\n");
4225 #ifdef CONFIG_IWLWIFI_DEBUG
4226 module_param_named(debug, iwl_debug_level, uint, 0644);
4227 MODULE_PARM_DESC(debug, "debug output mask");
4228 #endif
4229 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan, int, 0444);
4230 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4231 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, 0444);
4232 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4233
4234 module_exit(iwl3945_exit);
4235 module_init(iwl3945_init);