SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl3945-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/sched.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/ieee80211_radiotap.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         .sw_crypto = 1,
  93         .restart_fw = 1,
  94         /* the rest are 0 by default */
  95 };
  96
  97 /**
  98  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  99  * @priv: eeprom and antenna fields are used to determine antenna flags
 100  *
 101  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 102  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 103  *
 104  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 105  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 106  * IWL_ANTENNA_AUX       - Force AUX antenna
 107  */
 108 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 109 {
 110         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 111
 112         switch (iwl3945_mod_params.antenna) {
 113         case IWL_ANTENNA_DIVERSITY:
 114                 return 0;
 115
 116         case IWL_ANTENNA_MAIN:
 117                 if (eeprom->antenna_switch_type)
 118                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 119                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 120
 121         case IWL_ANTENNA_AUX:
 122                 if (eeprom->antenna_switch_type)
 123                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 124                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 125         }
 126
 127         /* bad antenna selector value */
 128         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 129                 iwl3945_mod_params.antenna);
 130
 131         return 0;               /* "diversity" is default if error */
 132 }
 133
 134 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 135                                    struct ieee80211_key_conf *keyconf,
 136                                    u8 sta_id)
 137 {
 138         unsigned long flags;
 139         __le16 key_flags = 0;
 140         int ret;
 141
 142         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 143         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 144
 145         if (sta_id == priv->hw_params.bcast_sta_id)
 146                 key_flags |= STA_KEY_MULTICAST_MSK;
 147
 148         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 149         keyconf->hw_key_idx = keyconf->keyidx;
 150         key_flags &= ~STA_KEY_FLG_INVALID;
 151
 152         spin_lock_irqsave(&priv->sta_lock, flags);
 153         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 154         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 155         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 156                keyconf->keylen);
 157
 158         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 159                keyconf->keylen);
 160
 161         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 162                         == STA_KEY_FLG_NO_ENC)
 163                 priv->stations[sta_id].sta.key.key_offset =
 164                                  iwl_get_free_ucode_key_index(priv);
 165         /* else, we are overriding an existing key => no need to allocated room
 166         * in uCode. */
 167
 168         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 169                 "no space for a new key");
 170
 171         priv->stations[sta_id].sta.key.key_flags = key_flags;
 172         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 173         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 174
 175         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 176
 177         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 178
 179         spin_unlock_irqrestore(&priv->sta_lock, flags);
 180
 181         return ret;
 182 }
 183
 184 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 185                                   struct ieee80211_key_conf *keyconf,
 186                                   u8 sta_id)
 187 {
 188         return -EOPNOTSUPP;
 189 }
 190
 191 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 192                                   struct ieee80211_key_conf *keyconf,
 193                                   u8 sta_id)
 194 {
 195         return -EOPNOTSUPP;
 196 }
 197
 198 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 199 {
 200         unsigned long flags;
 201
 202         spin_lock_irqsave(&priv->sta_lock, flags);
 203         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 204         memset(&priv->stations[sta_id].sta.key, 0,
 205                 sizeof(struct iwl4965_keyinfo));
 206         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 207         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 208         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 209         spin_unlock_irqrestore(&priv->sta_lock, flags);
 210
 211         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 212         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 213         return 0;
 214 }
 215
 216 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 217                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 218 {
 219         int ret = 0;
 220
 221         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 222
 223         switch (keyconf->alg) {
 224         case ALG_CCMP:
 225                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 226                 break;
 227         case ALG_TKIP:
 228                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 229                 break;
 230         case ALG_WEP:
 231                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 232                 break;
 233         default:
 234                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 235                 ret = -EINVAL;
 236         }
 237
 238         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 239                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 240                       sta_id, ret);
 241
 242         return ret;
 243 }
 244
 245 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 246 {
 247         int ret = -EOPNOTSUPP;
 248
 249         return ret;
 250 }
 251
 252 static int iwl3945_set_static_key(struct iwl_priv *priv,
 253                                 struct ieee80211_key_conf *key)
 254 {
 255         if (key->alg == ALG_WEP)
 256                 return -EOPNOTSUPP;
 257
 258         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 259         return -EINVAL;
 260 }
 261
 262 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 263 {
 264         struct list_head *element;
 265
 266         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 267                        priv->frames_count);
 268
 269         while (!list_empty(&priv->free_frames)) {
 270                 element = priv->free_frames.next;
 271                 list_del(element);
 272                 kfree(list_entry(element, struct iwl3945_frame, list));
 273                 priv->frames_count--;
 274         }
 275
 276         if (priv->frames_count) {
 277                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 278                             priv->frames_count);
 279                 priv->frames_count = 0;
 280         }
 281 }
 282
 283 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 284 {
 285         struct iwl3945_frame *frame;
 286         struct list_head *element;
 287         if (list_empty(&priv->free_frames)) {
 288                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 289                 if (!frame) {
 290                         IWL_ERR(priv, "Could not allocate frame!\n");
 291                         return NULL;
 292                 }
 293
 294                 priv->frames_count++;
 295                 return frame;
 296         }
 297
 298         element = priv->free_frames.next;
 299         list_del(element);
 300         return list_entry(element, struct iwl3945_frame, list);
 301 }
 302
 303 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 304 {
 305         memset(frame, 0, sizeof(*frame));
 306         list_add(&frame->list, &priv->free_frames);
 307 }
 308
 309 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 310                                 struct ieee80211_hdr *hdr,
 311                                 int left)
 312 {
 313
 314         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 315             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 316              (priv->iw_mode != NL80211_IFTYPE_AP)))
 317                 return 0;
 318
 319         if (priv->ibss_beacon->len > left)
 320                 return 0;
 321
 322         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 323
 324         return priv->ibss_beacon->len;
 325 }
 326
 327 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 328 {
 329         struct iwl3945_frame *frame;
 330         unsigned int frame_size;
 331         int rc;
 332         u8 rate;
 333
 334         frame = iwl3945_get_free_frame(priv);
 335
 336         if (!frame) {
 337                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 338                           "command.\n");
 339                 return -ENOMEM;
 340         }
 341
 342         rate = iwl_rate_get_lowest_plcp(priv);
 343
 344         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 345
 346         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 347                               &frame->u.cmd[0]);
 348
 349         iwl3945_free_frame(priv, frame);
 350
 351         return rc;
 352 }
 353
 354 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 355 {
 356         if (priv->shared_virt)
 357                 pci_free_consistent(priv->pci_dev,
 358                                     sizeof(struct iwl3945_shared),
 359                                     priv->shared_virt,
 360                                     priv->shared_phys);
 361 }
 362
 363 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 364                                       struct ieee80211_tx_info *info,
 365                                       struct iwl_device_cmd *cmd,
 366                                       struct sk_buff *skb_frag,
 367                                       int sta_id)
 368 {
 369         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 370         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 371
 372         switch (keyinfo->alg) {
 373         case ALG_CCMP:
 374                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 375                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 376                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 377                 break;
 378
 379         case ALG_TKIP:
 380                 break;
 381
 382         case ALG_WEP:
 383                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 384                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 385
 386                 if (keyinfo->keylen == 13)
 387                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 388
 389                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 390
 391                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 392                              "with key %d\n", info->control.hw_key->hw_key_idx);
 393                 break;
 394
 395         default:
 396                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 397                 break;
 398         }
 399 }
 400
 401 /*
 402  * handle build REPLY_TX command notification.
 403  */
 404 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 405                                   struct iwl_device_cmd *cmd,
 406                                   struct ieee80211_tx_info *info,
 407                                   struct ieee80211_hdr *hdr, u8 std_id)
 408 {
 409         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 410         __le32 tx_flags = tx_cmd->tx_flags;
 411         __le16 fc = hdr->frame_control;
 412
 413         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 414         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 415                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 416                 if (ieee80211_is_mgmt(fc))
 417                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 418                 if (ieee80211_is_probe_resp(fc) &&
 419                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 420                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 421         } else {
 422                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 423                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 424         }
 425
 426         tx_cmd->sta_id = std_id;
 427         if (ieee80211_has_morefrags(fc))
 428                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 429
 430         if (ieee80211_is_data_qos(fc)) {
 431                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 432                 tx_cmd->tid_tspec = qc[0] & 0xf;
 433                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 434         } else {
 435                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 436         }
 437
 438         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 439
 440         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 441                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 442
 443         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 444         if (ieee80211_is_mgmt(fc)) {
 445                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 446                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 447                 else
 448                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 449         } else {
 450                 tx_cmd->timeout.pm_frame_timeout = 0;
 451         }
 452
 453         tx_cmd->driver_txop = 0;
 454         tx_cmd->tx_flags = tx_flags;
 455         tx_cmd->next_frame_len = 0;
 456 }
 457
 458 /*
 459  * start REPLY_TX command process
 460  */
 461 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 462 {
 463         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 464         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 465         struct iwl3945_tx_cmd *tx_cmd;
 466         struct iwl_tx_queue *txq = NULL;
 467         struct iwl_queue *q = NULL;
 468         struct iwl_device_cmd *out_cmd;
 469         struct iwl_cmd_meta *out_meta;
 470         dma_addr_t phys_addr;
 471         dma_addr_t txcmd_phys;
 472         int txq_id = skb_get_queue_mapping(skb);
 473         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 474         u8 id;
 475         u8 unicast;
 476         u8 sta_id;
 477         u8 tid = 0;
 478         u16 seq_number = 0;
 479         __le16 fc;
 480         u8 wait_write_ptr = 0;
 481         u8 *qc = NULL;
 482         unsigned long flags;
 483         int rc;
 484
 485         spin_lock_irqsave(&priv->lock, flags);
 486         if (iwl_is_rfkill(priv)) {
 487                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 488                 goto drop_unlock;
 489         }
 490
 491         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 492                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 493                 goto drop_unlock;
 494         }
 495
 496         unicast = !is_multicast_ether_addr(hdr->addr1);
 497         id = 0;
 498
 499         fc = hdr->frame_control;
 500
 501 #ifdef CONFIG_IWLWIFI_DEBUG
 502         if (ieee80211_is_auth(fc))
 503                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 504         else if (ieee80211_is_assoc_req(fc))
 505                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 506         else if (ieee80211_is_reassoc_req(fc))
 507                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 508 #endif
 509
 510         /* drop all non-injected data frame if we are not associated */
 511         if (ieee80211_is_data(fc) &&
 512             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
 513             (!iwl_is_associated(priv) ||
 514              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 515                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 516                 goto drop_unlock;
 517         }
 518
 519         spin_unlock_irqrestore(&priv->lock, flags);
 520
 521         hdr_len = ieee80211_hdrlen(fc);
 522
 523         /* Find (or create) index into station table for destination station */
 524         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 525                 sta_id = priv->hw_params.bcast_sta_id;
 526         else
 527                 sta_id = iwl_get_sta_id(priv, hdr);
 528         if (sta_id == IWL_INVALID_STATION) {
 529                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 530                                hdr->addr1);
 531                 goto drop;
 532         }
 533
 534         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 535
 536         if (ieee80211_is_data_qos(fc)) {
 537                 qc = ieee80211_get_qos_ctl(hdr);
 538                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 539                 if (unlikely(tid >= MAX_TID_COUNT))
 540                         goto drop;
 541                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 542                                 IEEE80211_SCTL_SEQ;
 543                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 544                         (hdr->seq_ctrl &
 545                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 546                 seq_number += 0x10;
 547         }
 548
 549         /* Descriptor for chosen Tx queue */
 550         txq = &priv->txq[txq_id];
 551         q = &txq->q;
 552
 553         spin_lock_irqsave(&priv->lock, flags);
 554
 555         idx = get_cmd_index(q, q->write_ptr, 0);
 556
 557         /* Set up driver data for this TFD */
 558         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 559         txq->txb[q->write_ptr].skb[0] = skb;
 560
 561         /* Init first empty entry in queue's array of Tx/cmd buffers */
 562         out_cmd = txq->cmd[idx];
 563         out_meta = &txq->meta[idx];
 564         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 565         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 566         memset(tx_cmd, 0, sizeof(*tx_cmd));
 567
 568         /*
 569          * Set up the Tx-command (not MAC!) header.
 570          * Store the chosen Tx queue and TFD index within the sequence field;
 571          * after Tx, uCode's Tx response will return this value so driver can
 572          * locate the frame within the tx queue and do post-tx processing.
 573          */
 574         out_cmd->hdr.cmd = REPLY_TX;
 575         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 576                                 INDEX_TO_SEQ(q->write_ptr)));
 577
 578         /* Copy MAC header from skb into command buffer */
 579         memcpy(tx_cmd->hdr, hdr, hdr_len);
 580
 581
 582         if (info->control.hw_key)
 583                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 584
 585         /* TODO need this for burst mode later on */
 586         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 587
 588         /* set is_hcca to 0; it probably will never be implemented */
 589         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 590
 591         /* Total # bytes to be transmitted */
 592         len = (u16)skb->len;
 593         tx_cmd->len = cpu_to_le16(len);
 594
 595         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 596         iwl_update_stats(priv, true, fc, len);
 597         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 598         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 599
 600         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 601                 txq->need_update = 1;
 602                 if (qc)
 603                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 604         } else {
 605                 wait_write_ptr = 1;
 606                 txq->need_update = 0;
 607         }
 608
 609         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 610                      le16_to_cpu(out_cmd->hdr.sequence));
 611         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
 612         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 613         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 614                            ieee80211_hdrlen(fc));
 615
 616         /*
 617          * Use the first empty entry in this queue's command buffer array
 618          * to contain the Tx command and MAC header concatenated together
 619          * (payload data will be in another buffer).
 620          * Size of this varies, due to varying MAC header length.
 621          * If end is not dword aligned, we'll have 2 extra bytes at the end
 622          * of the MAC header (device reads on dword boundaries).
 623          * We'll tell device about this padding later.
 624          */
 625         len = sizeof(struct iwl3945_tx_cmd) +
 626                         sizeof(struct iwl_cmd_header) + hdr_len;
 627
 628         len_org = len;
 629         len = (len + 3) & ~3;
 630
 631         if (len_org != len)
 632                 len_org = 1;
 633         else
 634                 len_org = 0;
 635
 636         /* Physical address of this Tx command's header (not MAC header!),
 637          * within command buffer array. */
 638         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 639                                     len, PCI_DMA_TODEVICE);
 640         /* we do not map meta data ... so we can safely access address to
 641          * provide to unmap command*/
 642         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 643         pci_unmap_len_set(out_meta, len, len);
 644
 645         /* Add buffer containing Tx command and MAC(!) header to TFD's
 646          * first entry */
 647         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 648                                                    txcmd_phys, len, 1, 0);
 649
 650
 651         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 652          * if any (802.11 null frames have no payload). */
 653         len = skb->len - hdr_len;
 654         if (len) {
 655                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 656                                            len, PCI_DMA_TODEVICE);
 657                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 658                                                            phys_addr, len,
 659                                                            0, U32_PAD(len));
 660         }
 661
 662
 663         /* Tell device the write index *just past* this latest filled TFD */
 664         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 665         rc = iwl_txq_update_write_ptr(priv, txq);
 666         spin_unlock_irqrestore(&priv->lock, flags);
 667
 668         if (rc)
 669                 return rc;
 670
 671         if ((iwl_queue_space(q) < q->high_mark)
 672             && priv->mac80211_registered) {
 673                 if (wait_write_ptr) {
 674                         spin_lock_irqsave(&priv->lock, flags);
 675                         txq->need_update = 1;
 676                         iwl_txq_update_write_ptr(priv, txq);
 677                         spin_unlock_irqrestore(&priv->lock, flags);
 678                 }
 679
 680                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 681         }
 682
 683         return 0;
 684
 685 drop_unlock:
 686         spin_unlock_irqrestore(&priv->lock, flags);
 687 drop:
 688         return -1;
 689 }
 690
 691 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 692
 693 #include "iwl-spectrum.h"
 694
 695 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 696 #define BEACON_TIME_MASK_HIGH   0xFF000000
 697 #define TIME_UNIT               1024
 698
 699 /*
 700  * extended beacon time format
 701  * time in usec will be changed into a 32-bit value in 8:24 format
 702  * the high 1 byte is the beacon counts
 703  * the lower 3 bytes is the time in usec within one beacon interval
 704  */
 705
 706 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 707 {
 708         u32 quot;
 709         u32 rem;
 710         u32 interval = beacon_interval * 1024;
 711
 712         if (!interval || !usec)
 713                 return 0;
 714
 715         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 716         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 717
 718         return (quot << 24) + rem;
 719 }
 720
 721 /* base is usually what we get from ucode with each received frame,
 722  * the same as HW timer counter counting down
 723  */
 724
 725 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 726 {
 727         u32 base_low = base & BEACON_TIME_MASK_LOW;
 728         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 729         u32 interval = beacon_interval * TIME_UNIT;
 730         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 731             (addon & BEACON_TIME_MASK_HIGH);
 732
 733         if (base_low > addon_low)
 734                 res += base_low - addon_low;
 735         else if (base_low < addon_low) {
 736                 res += interval + base_low - addon_low;
 737                 res += (1 << 24);
 738         } else
 739                 res += (1 << 24);
 740
 741         return cpu_to_le32(res);
 742 }
 743
 744 static int iwl3945_get_measurement(struct iwl_priv *priv,
 745                                struct ieee80211_measurement_params *params,
 746                                u8 type)
 747 {
 748         struct iwl_spectrum_cmd spectrum;
 749         struct iwl_rx_packet *pkt;
 750         struct iwl_host_cmd cmd = {
 751                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 752                 .data = (void *)&spectrum,
 753                 .flags = CMD_WANT_SKB,
 754         };
 755         u32 add_time = le64_to_cpu(params->start_time);
 756         int rc;
 757         int spectrum_resp_status;
 758         int duration = le16_to_cpu(params->duration);
 759
 760         if (iwl_is_associated(priv))
 761                 add_time =
 762                     iwl3945_usecs_to_beacons(
 763                         le64_to_cpu(params->start_time) - priv->last_tsf,
 764                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 765
 766         memset(&spectrum, 0, sizeof(spectrum));
 767
 768         spectrum.channel_count = cpu_to_le16(1);
 769         spectrum.flags =
 770             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 771         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 772         cmd.len = sizeof(spectrum);
 773         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 774
 775         if (iwl_is_associated(priv))
 776                 spectrum.start_time =
 777                     iwl3945_add_beacon_time(priv->last_beacon_time,
 778                                 add_time,
 779                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 780         else
 781                 spectrum.start_time = 0;
 782
 783         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 784         spectrum.channels[0].channel = params->channel;
 785         spectrum.channels[0].type = type;
 786         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 787                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 788                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 789
 790         rc = iwl_send_cmd_sync(priv, &cmd);
 791         if (rc)
 792                 return rc;
 793
 794         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 795         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 796                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 797                 rc = -EIO;
 798         }
 799
 800         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 801         switch (spectrum_resp_status) {
 802         case 0:         /* Command will be handled */
 803                 if (pkt->u.spectrum.id != 0xff) {
 804                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 805                                                 pkt->u.spectrum.id);
 806                         priv->measurement_status &= ~MEASUREMENT_READY;
 807                 }
 808                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 809                 rc = 0;
 810                 break;
 811
 812         case 1:         /* Command will not be handled */
 813                 rc = -EAGAIN;
 814                 break;
 815         }
 816
 817         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
 818
 819         return rc;
 820 }
 821 #endif
 822
 823 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 824                                struct iwl_rx_mem_buffer *rxb)
 825 {
 826         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 827         struct iwl_alive_resp *palive;
 828         struct delayed_work *pwork;
 829
 830         palive = &pkt->u.alive_frame;
 831
 832         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 833                        "0x%01X 0x%01X\n",
 834                        palive->is_valid, palive->ver_type,
 835                        palive->ver_subtype);
 836
 837         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 838                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 839                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 840                        sizeof(struct iwl_alive_resp));
 841                 pwork = &priv->init_alive_start;
 842         } else {
 843                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 844                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 845                        sizeof(struct iwl_alive_resp));
 846                 pwork = &priv->alive_start;
 847                 iwl3945_disable_events(priv);
 848         }
 849
 850         /* We delay the ALIVE response by 5ms to
 851          * give the HW RF Kill time to activate... */
 852         if (palive->is_valid == UCODE_VALID_OK)
 853                 queue_delayed_work(priv->workqueue, pwork,
 854                                    msecs_to_jiffies(5));
 855         else
 856                 IWL_WARN(priv, "uCode did not respond OK.\n");
 857 }
 858
 859 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 860                                  struct iwl_rx_mem_buffer *rxb)
 861 {
 862 #ifdef CONFIG_IWLWIFI_DEBUG
 863         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 864 #endif
 865
 866         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 867         return;
 868 }
 869
 870 static void iwl3945_bg_beacon_update(struct work_struct *work)
 871 {
 872         struct iwl_priv *priv =
 873                 container_of(work, struct iwl_priv, beacon_update);
 874         struct sk_buff *beacon;
 875
 876         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 877         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 878
 879         if (!beacon) {
 880                 IWL_ERR(priv, "update beacon failed\n");
 881                 return;
 882         }
 883
 884         mutex_lock(&priv->mutex);
 885         /* new beacon skb is allocated every time; dispose previous.*/
 886         if (priv->ibss_beacon)
 887                 dev_kfree_skb(priv->ibss_beacon);
 888
 889         priv->ibss_beacon = beacon;
 890         mutex_unlock(&priv->mutex);
 891
 892         iwl3945_send_beacon_cmd(priv);
 893 }
 894
 895 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 896                                 struct iwl_rx_mem_buffer *rxb)
 897 {
 898 #ifdef CONFIG_IWLWIFI_DEBUG
 899         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 900         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 901         u8 rate = beacon->beacon_notify_hdr.rate;
 902
 903         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 904                 "tsf %d %d rate %d\n",
 905                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 906                 beacon->beacon_notify_hdr.failure_frame,
 907                 le32_to_cpu(beacon->ibss_mgr_status),
 908                 le32_to_cpu(beacon->high_tsf),
 909                 le32_to_cpu(beacon->low_tsf), rate);
 910 #endif
 911
 912         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 913             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 914                 queue_work(priv->workqueue, &priv->beacon_update);
 915 }
 916
 917 /* Handle notification from uCode that card's power state is changing
 918  * due to software, hardware, or critical temperature RFKILL */
 919 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 920                                     struct iwl_rx_mem_buffer *rxb)
 921 {
 922         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 923         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 924         unsigned long status = priv->status;
 925
 926         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 927                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 928                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 929
 930         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 931                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 932
 933         if (flags & HW_CARD_DISABLED)
 934                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 935         else
 936                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 937
 938
 939         iwl_scan_cancel(priv);
 940
 941         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 942              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 943                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 944                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 945         else
 946                 wake_up_interruptible(&priv->wait_command_queue);
 947 }
 948
 949 /**
 950  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 951  *
 952  * Setup the RX handlers for each of the reply types sent from the uCode
 953  * to the host.
 954  *
 955  * This function chains into the hardware specific files for them to setup
 956  * any hardware specific handlers as well.
 957  */
 958 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 959 {
 960         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 961         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 962         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 963         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 964         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 965         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 966             iwl_rx_pm_debug_statistics_notif;
 967         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 968
 969         /*
 970          * The same handler is used for both the REPLY to a discrete
 971          * statistics request from the host as well as for the periodic
 972          * statistics notifications (after received beacons) from the uCode.
 973          */
 974         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 975         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 976
 977         iwl_setup_spectrum_handlers(priv);
 978         iwl_setup_rx_scan_handlers(priv);
 979         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 980
 981         /* Set up hardware specific Rx handlers */
 982         iwl3945_hw_rx_handler_setup(priv);
 983 }
 984
 985 /************************** RX-FUNCTIONS ****************************/
 986 /*
 987  * Rx theory of operation
 988  *
 989  * The host allocates 32 DMA target addresses and passes the host address
 990  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 991  * 0 to 31
 992  *
 993  * Rx Queue Indexes
 994  * The host/firmware share two index registers for managing the Rx buffers.
 995  *
 996  * The READ index maps to the first position that the firmware may be writing
 997  * to -- the driver can read up to (but not including) this position and get
 998  * good data.
 999  * The READ index is managed by the firmware once the card is enabled.
1000  *
1001  * The WRITE index maps to the last position the driver has read from -- the
1002  * position preceding WRITE is the last slot the firmware can place a packet.
1003  *
1004  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1005  * WRITE = READ.
1006  *
1007  * During initialization, the host sets up the READ queue position to the first
1008  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1009  *
1010  * When the firmware places a packet in a buffer, it will advance the READ index
1011  * and fire the RX interrupt.  The driver can then query the READ index and
1012  * process as many packets as possible, moving the WRITE index forward as it
1013  * resets the Rx queue buffers with new memory.
1014  *
1015  * The management in the driver is as follows:
1016  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1017  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1018  *   to replenish the iwl->rxq->rx_free.
1019  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1020  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1021  *   'processed' and 'read' driver indexes as well)
1022  * + A received packet is processed and handed to the kernel network stack,
1023  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1024  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1025  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1026  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1027  *   were enough free buffers and RX_STALLED is set it is cleared.
1028  *
1029  *
1030  * Driver sequence:
1031  *
1032  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1033  *                            iwl3945_rx_queue_restock
1034  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1035  *                            queue, updates firmware pointers, and updates
1036  *                            the WRITE index.  If insufficient rx_free buffers
1037  *                            are available, schedules iwl3945_rx_replenish
1038  *
1039  * -- enable interrupts --
1040  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1041  *                            READ INDEX, detaching the SKB from the pool.
1042  *                            Moves the packet buffer from queue to rx_used.
1043  *                            Calls iwl3945_rx_queue_restock to refill any empty
1044  *                            slots.
1045  * ...
1046  *
1047  */
1048
1049 /**
1050  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1051  */
1052 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1053                                           dma_addr_t dma_addr)
1054 {
1055         return cpu_to_le32((u32)dma_addr);
1056 }
1057
1058 /**
1059  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1060  *
1061  * If there are slots in the RX queue that need to be restocked,
1062  * and we have free pre-allocated buffers, fill the ranks as much
1063  * as we can, pulling from rx_free.
1064  *
1065  * This moves the 'write' index forward to catch up with 'processed', and
1066  * also updates the memory address in the firmware to reference the new
1067  * target buffer.
1068  */
1069 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1070 {
1071         struct iwl_rx_queue *rxq = &priv->rxq;
1072         struct list_head *element;
1073         struct iwl_rx_mem_buffer *rxb;
1074         unsigned long flags;
1075         int write, rc;
1076
1077         spin_lock_irqsave(&rxq->lock, flags);
1078         write = rxq->write & ~0x7;
1079         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1080                 /* Get next free Rx buffer, remove from free list */
1081                 element = rxq->rx_free.next;
1082                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1083                 list_del(element);
1084
1085                 /* Point to Rx buffer via next RBD in circular buffer */
1086                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1087                 rxq->queue[rxq->write] = rxb;
1088                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1089                 rxq->free_count--;
1090         }
1091         spin_unlock_irqrestore(&rxq->lock, flags);
1092         /* If the pre-allocated buffer pool is dropping low, schedule to
1093          * refill it */
1094         if (rxq->free_count <= RX_LOW_WATERMARK)
1095                 queue_work(priv->workqueue, &priv->rx_replenish);
1096
1097
1098         /* If we've added more space for the firmware to place data, tell it.
1099          * Increment device's write pointer in multiples of 8. */
1100         if ((rxq->write_actual != (rxq->write & ~0x7))
1101             || (abs(rxq->write - rxq->read) > 7)) {
1102                 spin_lock_irqsave(&rxq->lock, flags);
1103                 rxq->need_update = 1;
1104                 spin_unlock_irqrestore(&rxq->lock, flags);
1105                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1106                 if (rc)
1107                         return rc;
1108         }
1109
1110         return 0;
1111 }
1112
1113 /**
1114  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1115  *
1116  * When moving to rx_free an SKB is allocated for the slot.
1117  *
1118  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1119  * This is called as a scheduled work item (except for during initialization)
1120  */
1121 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1122 {
1123         struct iwl_rx_queue *rxq = &priv->rxq;
1124         struct list_head *element;
1125         struct iwl_rx_mem_buffer *rxb;
1126         struct page *page;
1127         unsigned long flags;
1128         gfp_t gfp_mask = priority;
1129
1130         while (1) {
1131                 spin_lock_irqsave(&rxq->lock, flags);
1132
1133                 if (list_empty(&rxq->rx_used)) {
1134                         spin_unlock_irqrestore(&rxq->lock, flags);
1135                         return;
1136                 }
1137                 spin_unlock_irqrestore(&rxq->lock, flags);
1138
1139                 if (rxq->free_count > RX_LOW_WATERMARK)
1140                         gfp_mask |= __GFP_NOWARN;
1141
1142                 if (priv->hw_params.rx_page_order > 0)
1143                         gfp_mask |= __GFP_COMP;
1144
1145                 /* Alloc a new receive buffer */
1146                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1147                 if (!page) {
1148                         if (net_ratelimit())
1149                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1150                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1151                             net_ratelimit())
1152                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1153                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1154                                          rxq->free_count);
1155                         /* We don't reschedule replenish work here -- we will
1156                          * call the restock method and if it still needs
1157                          * more buffers it will schedule replenish */
1158                         break;
1159                 }
1160
1161                 spin_lock_irqsave(&rxq->lock, flags);
1162                 if (list_empty(&rxq->rx_used)) {
1163                         spin_unlock_irqrestore(&rxq->lock, flags);
1164                         __free_pages(page, priv->hw_params.rx_page_order);
1165                         return;
1166                 }
1167                 element = rxq->rx_used.next;
1168                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1169                 list_del(element);
1170                 spin_unlock_irqrestore(&rxq->lock, flags);
1171
1172                 rxb->page = page;
1173                 /* Get physical address of RB/SKB */
1174                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1175                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1176                                 PCI_DMA_FROMDEVICE);
1177
1178                 spin_lock_irqsave(&rxq->lock, flags);
1179
1180                 list_add_tail(&rxb->list, &rxq->rx_free);
1181                 rxq->free_count++;
1182                 priv->alloc_rxb_page++;
1183
1184                 spin_unlock_irqrestore(&rxq->lock, flags);
1185         }
1186 }
1187
1188 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1189 {
1190         unsigned long flags;
1191         int i;
1192         spin_lock_irqsave(&rxq->lock, flags);
1193         INIT_LIST_HEAD(&rxq->rx_free);
1194         INIT_LIST_HEAD(&rxq->rx_used);
1195         /* Fill the rx_used queue with _all_ of the Rx buffers */
1196         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1197                 /* In the reset function, these buffers may have been allocated
1198                  * to an SKB, so we need to unmap and free potential storage */
1199                 if (rxq->pool[i].page != NULL) {
1200                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1201                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1202                                 PCI_DMA_FROMDEVICE);
1203                         priv->alloc_rxb_page--;
1204                         __free_pages(rxq->pool[i].page,
1205                                      priv->hw_params.rx_page_order);
1206                         rxq->pool[i].page = NULL;
1207                 }
1208                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1209         }
1210
1211         /* Set us so that we have processed and used all buffers, but have
1212          * not restocked the Rx queue with fresh buffers */
1213         rxq->read = rxq->write = 0;
1214         rxq->write_actual = 0;
1215         rxq->free_count = 0;
1216         spin_unlock_irqrestore(&rxq->lock, flags);
1217 }
1218
1219 void iwl3945_rx_replenish(void *data)
1220 {
1221         struct iwl_priv *priv = data;
1222         unsigned long flags;
1223
1224         iwl3945_rx_allocate(priv, GFP_KERNEL);
1225
1226         spin_lock_irqsave(&priv->lock, flags);
1227         iwl3945_rx_queue_restock(priv);
1228         spin_unlock_irqrestore(&priv->lock, flags);
1229 }
1230
1231 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1232 {
1233         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1234
1235         iwl3945_rx_queue_restock(priv);
1236 }
1237
1238
1239 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1240  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1241  * This free routine walks the list of POOL entries and if SKB is set to
1242  * non NULL it is unmapped and freed
1243  */
1244 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1245 {
1246         int i;
1247         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1248                 if (rxq->pool[i].page != NULL) {
1249                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1250                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1251                                 PCI_DMA_FROMDEVICE);
1252                         __free_pages(rxq->pool[i].page,
1253                                      priv->hw_params.rx_page_order);
1254                         rxq->pool[i].page = NULL;
1255                         priv->alloc_rxb_page--;
1256                 }
1257         }
1258
1259         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1260                             rxq->dma_addr);
1261         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1262                             rxq->rb_stts, rxq->rb_stts_dma);
1263         rxq->bd = NULL;
1264         rxq->rb_stts  = NULL;
1265 }
1266
1267
1268 /* Convert linear signal-to-noise ratio into dB */
1269 static u8 ratio2dB[100] = {
1270 /*       0   1   2   3   4   5   6   7   8   9 */
1271          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1272         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1273         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1274         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1275         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1276         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1277         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1278         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1279         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1280         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1281 };
1282
1283 /* Calculates a relative dB value from a ratio of linear
1284  *   (i.e. not dB) signal levels.
1285  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1286 int iwl3945_calc_db_from_ratio(int sig_ratio)
1287 {
1288         /* 1000:1 or higher just report as 60 dB */
1289         if (sig_ratio >= 1000)
1290                 return 60;
1291
1292         /* 100:1 or higher, divide by 10 and use table,
1293          *   add 20 dB to make up for divide by 10 */
1294         if (sig_ratio >= 100)
1295                 return 20 + (int)ratio2dB[sig_ratio/10];
1296
1297         /* We shouldn't see this */
1298         if (sig_ratio < 1)
1299                 return 0;
1300
1301         /* Use table for ratios 1:1 - 99:1 */
1302         return (int)ratio2dB[sig_ratio];
1303 }
1304
1305 #define PERFECT_RSSI (-20) /* dBm */
1306 #define WORST_RSSI (-95)   /* dBm */
1307 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1308
1309 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1310  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1311  *   about formulas used below. */
1312 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1313 {
1314         int sig_qual;
1315         int degradation = PERFECT_RSSI - rssi_dbm;
1316
1317         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1318          * as indicator; formula is (signal dbm - noise dbm).
1319          * SNR at or above 40 is a great signal (100%).
1320          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1321          * Weakest usable signal is usually 10 - 15 dB SNR. */
1322         if (noise_dbm) {
1323                 if (rssi_dbm - noise_dbm >= 40)
1324                         return 100;
1325                 else if (rssi_dbm < noise_dbm)
1326                         return 0;
1327                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1328
1329         /* Else use just the signal level.
1330          * This formula is a least squares fit of data points collected and
1331          *   compared with a reference system that had a percentage (%) display
1332          *   for signal quality. */
1333         } else
1334                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1335                             (15 * RSSI_RANGE + 62 * degradation)) /
1336                            (RSSI_RANGE * RSSI_RANGE);
1337
1338         if (sig_qual > 100)
1339                 sig_qual = 100;
1340         else if (sig_qual < 1)
1341                 sig_qual = 0;
1342
1343         return sig_qual;
1344 }
1345
1346 /**
1347  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1348  *
1349  * Uses the priv->rx_handlers callback function array to invoke
1350  * the appropriate handlers, including command responses,
1351  * frame-received notifications, and other notifications.
1352  */
1353 static void iwl3945_rx_handle(struct iwl_priv *priv)
1354 {
1355         struct iwl_rx_mem_buffer *rxb;
1356         struct iwl_rx_packet *pkt;
1357         struct iwl_rx_queue *rxq = &priv->rxq;
1358         u32 r, i;
1359         int reclaim;
1360         unsigned long flags;
1361         u8 fill_rx = 0;
1362         u32 count = 8;
1363         int total_empty = 0;
1364
1365         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1366          * buffer that the driver may process (last buffer filled by ucode). */
1367         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1368         i = rxq->read;
1369
1370         /* calculate total frames need to be restock after handling RX */
1371         total_empty = r - rxq->write_actual;
1372         if (total_empty < 0)
1373                 total_empty += RX_QUEUE_SIZE;
1374
1375         if (total_empty > (RX_QUEUE_SIZE / 2))
1376                 fill_rx = 1;
1377         /* Rx interrupt, but nothing sent from uCode */
1378         if (i == r)
1379                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1380
1381         while (i != r) {
1382                 rxb = rxq->queue[i];
1383
1384                 /* If an RXB doesn't have a Rx queue slot associated with it,
1385                  * then a bug has been introduced in the queue refilling
1386                  * routines -- catch it here */
1387                 BUG_ON(rxb == NULL);
1388
1389                 rxq->queue[i] = NULL;
1390
1391                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1392                                PAGE_SIZE << priv->hw_params.rx_page_order,
1393                                PCI_DMA_FROMDEVICE);
1394                 pkt = rxb_addr(rxb);
1395
1396                 trace_iwlwifi_dev_rx(priv, pkt,
1397                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1398
1399                 /* Reclaim a command buffer only if this packet is a response
1400                  *   to a (driver-originated) command.
1401                  * If the packet (e.g. Rx frame) originated from uCode,
1402                  *   there is no command buffer to reclaim.
1403                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1404                  *   but apparently a few don't get set; catch them here. */
1405                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1406                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1407                         (pkt->hdr.cmd != REPLY_TX);
1408
1409                 /* Based on type of command response or notification,
1410                  *   handle those that need handling via function in
1411                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1412                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1413                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1414                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1415                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1416                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1417                 } else {
1418                         /* No handling needed */
1419                         IWL_DEBUG_RX(priv,
1420                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1421                                 r, i, get_cmd_string(pkt->hdr.cmd),
1422                                 pkt->hdr.cmd);
1423                 }
1424
1425                 /*
1426                  * XXX: After here, we should always check rxb->page
1427                  * against NULL before touching it or its virtual
1428                  * memory (pkt). Because some rx_handler might have
1429                  * already taken or freed the pages.
1430                  */
1431
1432                 if (reclaim) {
1433                         /* Invoke any callbacks, transfer the buffer to caller,
1434                          * and fire off the (possibly) blocking iwl_send_cmd()
1435                          * as we reclaim the driver command queue */
1436                         if (rxb->page)
1437                                 iwl_tx_cmd_complete(priv, rxb);
1438                         else
1439                                 IWL_WARN(priv, "Claim null rxb?\n");
1440                 }
1441
1442                 /* Reuse the page if possible. For notification packets and
1443                  * SKBs that fail to Rx correctly, add them back into the
1444                  * rx_free list for reuse later. */
1445                 spin_lock_irqsave(&rxq->lock, flags);
1446                 if (rxb->page != NULL) {
1447                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1448                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1449                                 PCI_DMA_FROMDEVICE);
1450                         list_add_tail(&rxb->list, &rxq->rx_free);
1451                         rxq->free_count++;
1452                 } else
1453                         list_add_tail(&rxb->list, &rxq->rx_used);
1454
1455                 spin_unlock_irqrestore(&rxq->lock, flags);
1456
1457                 i = (i + 1) & RX_QUEUE_MASK;
1458                 /* If there are a lot of unused frames,
1459                  * restock the Rx queue so ucode won't assert. */
1460                 if (fill_rx) {
1461                         count++;
1462                         if (count >= 8) {
1463                                 rxq->read = i;
1464                                 iwl3945_rx_replenish_now(priv);
1465                                 count = 0;
1466                         }
1467                 }
1468         }
1469
1470         /* Backtrack one entry */
1471         rxq->read = i;
1472         if (fill_rx)
1473                 iwl3945_rx_replenish_now(priv);
1474         else
1475                 iwl3945_rx_queue_restock(priv);
1476 }
1477
1478 /* call this function to flush any scheduled tasklet */
1479 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1480 {
1481         /* wait to make sure we flush pending tasklet*/
1482         synchronize_irq(priv->pci_dev->irq);
1483         tasklet_kill(&priv->irq_tasklet);
1484 }
1485
1486 static const char *desc_lookup(int i)
1487 {
1488         switch (i) {
1489         case 1:
1490                 return "FAIL";
1491         case 2:
1492                 return "BAD_PARAM";
1493         case 3:
1494                 return "BAD_CHECKSUM";
1495         case 4:
1496                 return "NMI_INTERRUPT";
1497         case 5:
1498                 return "SYSASSERT";
1499         case 6:
1500                 return "FATAL_ERROR";
1501         }
1502
1503         return "UNKNOWN";
1504 }
1505
1506 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1507 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1508
1509 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1510 {
1511         u32 i;
1512         u32 desc, time, count, base, data1;
1513         u32 blink1, blink2, ilink1, ilink2;
1514
1515         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1516
1517         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1518                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1519                 return;
1520         }
1521
1522
1523         count = iwl_read_targ_mem(priv, base);
1524
1525         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1526                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1527                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1528                         priv->status, count);
1529         }
1530
1531         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1532                   "ilink1  nmiPC   Line\n");
1533         for (i = ERROR_START_OFFSET;
1534              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1535              i += ERROR_ELEM_SIZE) {
1536                 desc = iwl_read_targ_mem(priv, base + i);
1537                 time =
1538                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1539                 blink1 =
1540                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1541                 blink2 =
1542                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1543                 ilink1 =
1544                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1545                 ilink2 =
1546                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1547                 data1 =
1548                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1549
1550                 IWL_ERR(priv,
1551                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1552                         desc_lookup(desc), desc, time, blink1, blink2,
1553                         ilink1, ilink2, data1);
1554                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1555                                         0, blink1, blink2, ilink1, ilink2);
1556         }
1557 }
1558
1559 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1560
1561 /**
1562  * iwl3945_print_event_log - Dump error event log to syslog
1563  *
1564  */
1565 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1566                                 u32 num_events, u32 mode)
1567 {
1568         u32 i;
1569         u32 base;       /* SRAM byte address of event log header */
1570         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1571         u32 ptr;        /* SRAM byte address of log data */
1572         u32 ev, time, data; /* event log data */
1573         unsigned long reg_flags;
1574
1575         if (num_events == 0)
1576                 return;
1577
1578         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1579
1580         if (mode == 0)
1581                 event_size = 2 * sizeof(u32);
1582         else
1583                 event_size = 3 * sizeof(u32);
1584
1585         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1586
1587         /* Make sure device is powered up for SRAM reads */
1588         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1589         iwl_grab_nic_access(priv);
1590
1591         /* Set starting address; reads will auto-increment */
1592         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1593         rmb();
1594
1595         /* "time" is actually "data" for mode 0 (no timestamp).
1596          * place event id # at far right for easier visual parsing. */
1597         for (i = 0; i < num_events; i++) {
1598                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1599                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1600                 if (mode == 0) {
1601                         /* data, ev */
1602                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1603                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1604                 } else {
1605                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1606                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1607                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1608                 }
1609         }
1610
1611         /* Allow device to power down */
1612         iwl_release_nic_access(priv);
1613         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1614 }
1615
1616 /**
1617  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1618  */
1619 static void iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1620                                       u32 num_wraps, u32 next_entry,
1621                                       u32 size, u32 mode)
1622 {
1623         /*
1624          * display the newest DEFAULT_LOG_ENTRIES entries
1625          * i.e the entries just before the next ont that uCode would fill.
1626          */
1627         if (num_wraps) {
1628                 if (next_entry < size) {
1629                         iwl3945_print_event_log(priv,
1630                                         capacity - (size - next_entry),
1631                                         size - next_entry, mode);
1632                         iwl3945_print_event_log(priv, 0,
1633                                     next_entry, mode);
1634                 } else
1635                         iwl3945_print_event_log(priv, next_entry - size,
1636                                     size, mode);
1637         } else {
1638                 if (next_entry < size)
1639                         iwl3945_print_event_log(priv, 0, next_entry, mode);
1640                 else
1641                         iwl3945_print_event_log(priv, next_entry - size,
1642                                             size, mode);
1643         }
1644 }
1645
1646 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1647 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1648
1649 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1650
1651 void iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log)
1652 {
1653         u32 base;       /* SRAM byte address of event log header */
1654         u32 capacity;   /* event log capacity in # entries */
1655         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1656         u32 num_wraps;  /* # times uCode wrapped to top of log */
1657         u32 next_entry; /* index of next entry to be written by uCode */
1658         u32 size;       /* # entries that we'll print */
1659
1660         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1661         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1662                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1663                 return;
1664         }
1665
1666         /* event log header */
1667         capacity = iwl_read_targ_mem(priv, base);
1668         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1669         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1670         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1671
1672         if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1673                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1674                         capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1675                 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1676         }
1677
1678         if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1679                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1680                         next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1681                 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1682         }
1683
1684         size = num_wraps ? capacity : next_entry;
1685
1686         /* bail out if nothing in log */
1687         if (size == 0) {
1688                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1689                 return;
1690         }
1691
1692 #ifdef CONFIG_IWLWIFI_DEBUG
1693         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS))
1694                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1695                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1696 #else
1697         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1698                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1699 #endif
1700
1701         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1702                   size);
1703
1704         /* if uCode has wrapped back to top of log, start at the oldest entry,
1705          * i.e the next one that uCode would fill. */
1706         if (num_wraps)
1707                 iwl3945_print_event_log(priv, next_entry,
1708                                     capacity - next_entry, mode);
1709
1710         /* (then/else) start at top of log */
1711         iwl3945_print_event_log(priv, 0, next_entry, mode);
1712
1713 #ifdef CONFIG_IWLWIFI_DEBUG
1714         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1715                 /* if uCode has wrapped back to top of log,
1716                  * start at the oldest entry,
1717                  * i.e the next one that uCode would fill.
1718                  */
1719                 if (num_wraps)
1720                         iwl3945_print_event_log(priv, next_entry,
1721                                     capacity - next_entry, mode);
1722
1723                 /* (then/else) start at top of log */
1724                 iwl3945_print_event_log(priv, 0, next_entry, mode);
1725         } else
1726                 iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1727                                         next_entry, size, mode);
1728 #else
1729         iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1730                                 next_entry, size, mode);
1731 #endif
1732
1733 }
1734
1735 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1736 {
1737         u32 inta, handled = 0;
1738         u32 inta_fh;
1739         unsigned long flags;
1740 #ifdef CONFIG_IWLWIFI_DEBUG
1741         u32 inta_mask;
1742 #endif
1743
1744         spin_lock_irqsave(&priv->lock, flags);
1745
1746         /* Ack/clear/reset pending uCode interrupts.
1747          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1748          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1749         inta = iwl_read32(priv, CSR_INT);
1750         iwl_write32(priv, CSR_INT, inta);
1751
1752         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1753          * Any new interrupts that happen after this, either while we're
1754          * in this tasklet, or later, will show up in next ISR/tasklet. */
1755         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1756         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1757
1758 #ifdef CONFIG_IWLWIFI_DEBUG
1759         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1760                 /* just for debug */
1761                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1762                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1763                               inta, inta_mask, inta_fh);
1764         }
1765 #endif
1766
1767         spin_unlock_irqrestore(&priv->lock, flags);
1768
1769         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1770          * atomic, make sure that inta covers all the interrupts that
1771          * we've discovered, even if FH interrupt came in just after
1772          * reading CSR_INT. */
1773         if (inta_fh & CSR39_FH_INT_RX_MASK)
1774                 inta |= CSR_INT_BIT_FH_RX;
1775         if (inta_fh & CSR39_FH_INT_TX_MASK)
1776                 inta |= CSR_INT_BIT_FH_TX;
1777
1778         /* Now service all interrupt bits discovered above. */
1779         if (inta & CSR_INT_BIT_HW_ERR) {
1780                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1781
1782                 /* Tell the device to stop sending interrupts */
1783                 iwl_disable_interrupts(priv);
1784
1785                 priv->isr_stats.hw++;
1786                 iwl_irq_handle_error(priv);
1787
1788                 handled |= CSR_INT_BIT_HW_ERR;
1789
1790                 return;
1791         }
1792
1793 #ifdef CONFIG_IWLWIFI_DEBUG
1794         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1795                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1796                 if (inta & CSR_INT_BIT_SCD) {
1797                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1798                                       "the frame/frames.\n");
1799                         priv->isr_stats.sch++;
1800                 }
1801
1802                 /* Alive notification via Rx interrupt will do the real work */
1803                 if (inta & CSR_INT_BIT_ALIVE) {
1804                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1805                         priv->isr_stats.alive++;
1806                 }
1807         }
1808 #endif
1809         /* Safely ignore these bits for debug checks below */
1810         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1811
1812         /* Error detected by uCode */
1813         if (inta & CSR_INT_BIT_SW_ERR) {
1814                 IWL_ERR(priv, "Microcode SW error detected. "
1815                         "Restarting 0x%X.\n", inta);
1816                 priv->isr_stats.sw++;
1817                 priv->isr_stats.sw_err = inta;
1818                 iwl_irq_handle_error(priv);
1819                 handled |= CSR_INT_BIT_SW_ERR;
1820         }
1821
1822         /* uCode wakes up after power-down sleep */
1823         if (inta & CSR_INT_BIT_WAKEUP) {
1824                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1825                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1826                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1827                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1828                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1829                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1830                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1831                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1832
1833                 priv->isr_stats.wakeup++;
1834                 handled |= CSR_INT_BIT_WAKEUP;
1835         }
1836
1837         /* All uCode command responses, including Tx command responses,
1838          * Rx "responses" (frame-received notification), and other
1839          * notifications from uCode come through here*/
1840         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1841                 iwl3945_rx_handle(priv);
1842                 priv->isr_stats.rx++;
1843                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1844         }
1845
1846         if (inta & CSR_INT_BIT_FH_TX) {
1847                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1848                 priv->isr_stats.tx++;
1849
1850                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1851                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1852                                         (FH39_SRVC_CHNL), 0x0);
1853                 handled |= CSR_INT_BIT_FH_TX;
1854         }
1855
1856         if (inta & ~handled) {
1857                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1858                 priv->isr_stats.unhandled++;
1859         }
1860
1861         if (inta & ~priv->inta_mask) {
1862                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1863                          inta & ~priv->inta_mask);
1864                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1865         }
1866
1867         /* Re-enable all interrupts */
1868         /* only Re-enable if disabled by irq */
1869         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1870                 iwl_enable_interrupts(priv);
1871
1872 #ifdef CONFIG_IWLWIFI_DEBUG
1873         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1874                 inta = iwl_read32(priv, CSR_INT);
1875                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1876                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1877                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1878                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1879         }
1880 #endif
1881 }
1882
1883 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1884                                          enum ieee80211_band band,
1885                                      u8 is_active, u8 n_probes,
1886                                      struct iwl3945_scan_channel *scan_ch)
1887 {
1888         struct ieee80211_channel *chan;
1889         const struct ieee80211_supported_band *sband;
1890         const struct iwl_channel_info *ch_info;
1891         u16 passive_dwell = 0;
1892         u16 active_dwell = 0;
1893         int added, i;
1894
1895         sband = iwl_get_hw_mode(priv, band);
1896         if (!sband)
1897                 return 0;
1898
1899         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1900         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1901
1902         if (passive_dwell <= active_dwell)
1903                 passive_dwell = active_dwell + 1;
1904
1905         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1906                 chan = priv->scan_request->channels[i];
1907
1908                 if (chan->band != band)
1909                         continue;
1910
1911                 scan_ch->channel = chan->hw_value;
1912
1913                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1914                 if (!is_channel_valid(ch_info)) {
1915                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1916                                        scan_ch->channel);
1917                         continue;
1918                 }
1919
1920                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1921                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1922                 /* If passive , set up for auto-switch
1923                  *  and use long active_dwell time.
1924                  */
1925                 if (!is_active || is_channel_passive(ch_info) ||
1926                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1927                         scan_ch->type = 0;      /* passive */
1928                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1929                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1930                 } else {
1931                         scan_ch->type = 1;      /* active */
1932                 }
1933
1934                 /* Set direct probe bits. These may be used both for active
1935                  * scan channels (probes gets sent right away),
1936                  * or for passive channels (probes get se sent only after
1937                  * hearing clear Rx packet).*/
1938                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1939                         if (n_probes)
1940                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1941                 } else {
1942                         /* uCode v1 does not allow setting direct probe bits on
1943                          * passive channel. */
1944                         if ((scan_ch->type & 1) && n_probes)
1945                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1946                 }
1947
1948                 /* Set txpower levels to defaults */
1949                 scan_ch->tpc.dsp_atten = 110;
1950                 /* scan_pwr_info->tpc.dsp_atten; */
1951
1952                 /*scan_pwr_info->tpc.tx_gain; */
1953                 if (band == IEEE80211_BAND_5GHZ)
1954                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1955                 else {
1956                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1957                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1958                          * power level:
1959                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1960                          */
1961                 }
1962
1963                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1964                                scan_ch->channel,
1965                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1966                                (scan_ch->type & 1) ?
1967                                active_dwell : passive_dwell);
1968
1969                 scan_ch++;
1970                 added++;
1971         }
1972
1973         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1974         return added;
1975 }
1976
1977 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1978                               struct ieee80211_rate *rates)
1979 {
1980         int i;
1981
1982         for (i = 0; i < IWL_RATE_COUNT; i++) {
1983                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1984                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1985                 rates[i].hw_value_short = i;
1986                 rates[i].flags = 0;
1987                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1988                         /*
1989                          * If CCK != 1M then set short preamble rate flag.
1990                          */
1991                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1992                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1993                 }
1994         }
1995 }
1996
1997 /******************************************************************************
1998  *
1999  * uCode download functions
2000  *
2001  ******************************************************************************/
2002
2003 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
2004 {
2005         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
2006         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
2007         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2008         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
2009         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2010         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2011 }
2012
2013 /**
2014  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2015  *     looking at all data.
2016  */
2017 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2018 {
2019         u32 val;
2020         u32 save_len = len;
2021         int rc = 0;
2022         u32 errcnt;
2023
2024         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2025
2026         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2027                                IWL39_RTC_INST_LOWER_BOUND);
2028
2029         errcnt = 0;
2030         for (; len > 0; len -= sizeof(u32), image++) {
2031                 /* read data comes through single port, auto-incr addr */
2032                 /* NOTE: Use the debugless read so we don't flood kernel log
2033                  * if IWL_DL_IO is set */
2034                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2035                 if (val != le32_to_cpu(*image)) {
2036                         IWL_ERR(priv, "uCode INST section is invalid at "
2037                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2038                                   save_len - len, val, le32_to_cpu(*image));
2039                         rc = -EIO;
2040                         errcnt++;
2041                         if (errcnt >= 20)
2042                                 break;
2043                 }
2044         }
2045
2046
2047         if (!errcnt)
2048                 IWL_DEBUG_INFO(priv,
2049                         "ucode image in INSTRUCTION memory is good\n");
2050
2051         return rc;
2052 }
2053
2054
2055 /**
2056  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2057  *   using sample data 100 bytes apart.  If these sample points are good,
2058  *   it's a pretty good bet that everything between them is good, too.
2059  */
2060 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2061 {
2062         u32 val;
2063         int rc = 0;
2064         u32 errcnt = 0;
2065         u32 i;
2066
2067         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2068
2069         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2070                 /* read data comes through single port, auto-incr addr */
2071                 /* NOTE: Use the debugless read so we don't flood kernel log
2072                  * if IWL_DL_IO is set */
2073                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2074                         i + IWL39_RTC_INST_LOWER_BOUND);
2075                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2076                 if (val != le32_to_cpu(*image)) {
2077 #if 0 /* Enable this if you want to see details */
2078                         IWL_ERR(priv, "uCode INST section is invalid at "
2079                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2080                                   i, val, *image);
2081 #endif
2082                         rc = -EIO;
2083                         errcnt++;
2084                         if (errcnt >= 3)
2085                                 break;
2086                 }
2087         }
2088
2089         return rc;
2090 }
2091
2092
2093 /**
2094  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2095  *    and verify its contents
2096  */
2097 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2098 {
2099         __le32 *image;
2100         u32 len;
2101         int rc = 0;
2102
2103         /* Try bootstrap */
2104         image = (__le32 *)priv->ucode_boot.v_addr;
2105         len = priv->ucode_boot.len;
2106         rc = iwl3945_verify_inst_sparse(priv, image, len);
2107         if (rc == 0) {
2108                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2109                 return 0;
2110         }
2111
2112         /* Try initialize */
2113         image = (__le32 *)priv->ucode_init.v_addr;
2114         len = priv->ucode_init.len;
2115         rc = iwl3945_verify_inst_sparse(priv, image, len);
2116         if (rc == 0) {
2117                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2118                 return 0;
2119         }
2120
2121         /* Try runtime/protocol */
2122         image = (__le32 *)priv->ucode_code.v_addr;
2123         len = priv->ucode_code.len;
2124         rc = iwl3945_verify_inst_sparse(priv, image, len);
2125         if (rc == 0) {
2126                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2127                 return 0;
2128         }
2129
2130         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2131
2132         /* Since nothing seems to match, show first several data entries in
2133          * instruction SRAM, so maybe visual inspection will give a clue.
2134          * Selection of bootstrap image (vs. other images) is arbitrary. */
2135         image = (__le32 *)priv->ucode_boot.v_addr;
2136         len = priv->ucode_boot.len;
2137         rc = iwl3945_verify_inst_full(priv, image, len);
2138
2139         return rc;
2140 }
2141
2142 static void iwl3945_nic_start(struct iwl_priv *priv)
2143 {
2144         /* Remove all resets to allow NIC to operate */
2145         iwl_write32(priv, CSR_RESET, 0);
2146 }
2147
2148 /**
2149  * iwl3945_read_ucode - Read uCode images from disk file.
2150  *
2151  * Copy into buffers for card to fetch via bus-mastering
2152  */
2153 static int iwl3945_read_ucode(struct iwl_priv *priv)
2154 {
2155         const struct iwl_ucode_header *ucode;
2156         int ret = -EINVAL, index;
2157         const struct firmware *ucode_raw;
2158         /* firmware file name contains uCode/driver compatibility version */
2159         const char *name_pre = priv->cfg->fw_name_pre;
2160         const unsigned int api_max = priv->cfg->ucode_api_max;
2161         const unsigned int api_min = priv->cfg->ucode_api_min;
2162         char buf[25];
2163         u8 *src;
2164         size_t len;
2165         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2166
2167         /* Ask kernel firmware_class module to get the boot firmware off disk.
2168          * request_firmware() is synchronous, file is in memory on return. */
2169         for (index = api_max; index >= api_min; index--) {
2170                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2171                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2172                 if (ret < 0) {
2173                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2174                                   buf, ret);
2175                         if (ret == -ENOENT)
2176                                 continue;
2177                         else
2178                                 goto error;
2179                 } else {
2180                         if (index < api_max)
2181                                 IWL_ERR(priv, "Loaded firmware %s, "
2182                                         "which is deprecated. "
2183                                         " Please use API v%u instead.\n",
2184                                           buf, api_max);
2185                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2186                                        "(%zd bytes) from disk\n",
2187                                        buf, ucode_raw->size);
2188                         break;
2189                 }
2190         }
2191
2192         if (ret < 0)
2193                 goto error;
2194
2195         /* Make sure that we got at least our header! */
2196         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2197                 IWL_ERR(priv, "File size way too small!\n");
2198                 ret = -EINVAL;
2199                 goto err_release;
2200         }
2201
2202         /* Data from ucode file:  header followed by uCode images */
2203         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2204
2205         priv->ucode_ver = le32_to_cpu(ucode->ver);
2206         api_ver = IWL_UCODE_API(priv->ucode_ver);
2207         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2208         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2209         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2210         init_data_size =
2211                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2212         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2213         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2214
2215         /* api_ver should match the api version forming part of the
2216          * firmware filename ... but we don't check for that and only rely
2217          * on the API version read from firmware header from here on forward */
2218
2219         if (api_ver < api_min || api_ver > api_max) {
2220                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2221                           "Driver supports v%u, firmware is v%u.\n",
2222                           api_max, api_ver);
2223                 priv->ucode_ver = 0;
2224                 ret = -EINVAL;
2225                 goto err_release;
2226         }
2227         if (api_ver != api_max)
2228                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2229                           "got %u. New firmware can be obtained "
2230                           "from http://www.intellinuxwireless.org.\n",
2231                           api_max, api_ver);
2232
2233         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2234                 IWL_UCODE_MAJOR(priv->ucode_ver),
2235                 IWL_UCODE_MINOR(priv->ucode_ver),
2236                 IWL_UCODE_API(priv->ucode_ver),
2237                 IWL_UCODE_SERIAL(priv->ucode_ver));
2238
2239         snprintf(priv->hw->wiphy->fw_version,
2240                  sizeof(priv->hw->wiphy->fw_version),
2241                  "%u.%u.%u.%u",
2242                  IWL_UCODE_MAJOR(priv->ucode_ver),
2243                  IWL_UCODE_MINOR(priv->ucode_ver),
2244                  IWL_UCODE_API(priv->ucode_ver),
2245                  IWL_UCODE_SERIAL(priv->ucode_ver));
2246
2247         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2248                        priv->ucode_ver);
2249         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2250                        inst_size);
2251         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2252                        data_size);
2253         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2254                        init_size);
2255         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2256                        init_data_size);
2257         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2258                        boot_size);
2259
2260
2261         /* Verify size of file vs. image size info in file's header */
2262         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2263                 inst_size + data_size + init_size +
2264                 init_data_size + boot_size) {
2265
2266                 IWL_DEBUG_INFO(priv,
2267                         "uCode file size %zd does not match expected size\n",
2268                         ucode_raw->size);
2269                 ret = -EINVAL;
2270                 goto err_release;
2271         }
2272
2273         /* Verify that uCode images will fit in card's SRAM */
2274         if (inst_size > IWL39_MAX_INST_SIZE) {
2275                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2276                                inst_size);
2277                 ret = -EINVAL;
2278                 goto err_release;
2279         }
2280
2281         if (data_size > IWL39_MAX_DATA_SIZE) {
2282                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2283                                data_size);
2284                 ret = -EINVAL;
2285                 goto err_release;
2286         }
2287         if (init_size > IWL39_MAX_INST_SIZE) {
2288                 IWL_DEBUG_INFO(priv,
2289                                 "uCode init instr len %d too large to fit in\n",
2290                                 init_size);
2291                 ret = -EINVAL;
2292                 goto err_release;
2293         }
2294         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2295                 IWL_DEBUG_INFO(priv,
2296                                 "uCode init data len %d too large to fit in\n",
2297                                 init_data_size);
2298                 ret = -EINVAL;
2299                 goto err_release;
2300         }
2301         if (boot_size > IWL39_MAX_BSM_SIZE) {
2302                 IWL_DEBUG_INFO(priv,
2303                                 "uCode boot instr len %d too large to fit in\n",
2304                                 boot_size);
2305                 ret = -EINVAL;
2306                 goto err_release;
2307         }
2308
2309         /* Allocate ucode buffers for card's bus-master loading ... */
2310
2311         /* Runtime instructions and 2 copies of data:
2312          * 1) unmodified from disk
2313          * 2) backup cache for save/restore during power-downs */
2314         priv->ucode_code.len = inst_size;
2315         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2316
2317         priv->ucode_data.len = data_size;
2318         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2319
2320         priv->ucode_data_backup.len = data_size;
2321         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2322
2323         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2324             !priv->ucode_data_backup.v_addr)
2325                 goto err_pci_alloc;
2326
2327         /* Initialization instructions and data */
2328         if (init_size && init_data_size) {
2329                 priv->ucode_init.len = init_size;
2330                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2331
2332                 priv->ucode_init_data.len = init_data_size;
2333                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2334
2335                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2336                         goto err_pci_alloc;
2337         }
2338
2339         /* Bootstrap (instructions only, no data) */
2340         if (boot_size) {
2341                 priv->ucode_boot.len = boot_size;
2342                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2343
2344                 if (!priv->ucode_boot.v_addr)
2345                         goto err_pci_alloc;
2346         }
2347
2348         /* Copy images into buffers for card's bus-master reads ... */
2349
2350         /* Runtime instructions (first block of data in file) */
2351         len = inst_size;
2352         IWL_DEBUG_INFO(priv,
2353                 "Copying (but not loading) uCode instr len %zd\n", len);
2354         memcpy(priv->ucode_code.v_addr, src, len);
2355         src += len;
2356
2357         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2358                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2359
2360         /* Runtime data (2nd block)
2361          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2362         len = data_size;
2363         IWL_DEBUG_INFO(priv,
2364                 "Copying (but not loading) uCode data len %zd\n", len);
2365         memcpy(priv->ucode_data.v_addr, src, len);
2366         memcpy(priv->ucode_data_backup.v_addr, src, len);
2367         src += len;
2368
2369         /* Initialization instructions (3rd block) */
2370         if (init_size) {
2371                 len = init_size;
2372                 IWL_DEBUG_INFO(priv,
2373                         "Copying (but not loading) init instr len %zd\n", len);
2374                 memcpy(priv->ucode_init.v_addr, src, len);
2375                 src += len;
2376         }
2377
2378         /* Initialization data (4th block) */
2379         if (init_data_size) {
2380                 len = init_data_size;
2381                 IWL_DEBUG_INFO(priv,
2382                         "Copying (but not loading) init data len %zd\n", len);
2383                 memcpy(priv->ucode_init_data.v_addr, src, len);
2384                 src += len;
2385         }
2386
2387         /* Bootstrap instructions (5th block) */
2388         len = boot_size;
2389         IWL_DEBUG_INFO(priv,
2390                 "Copying (but not loading) boot instr len %zd\n", len);
2391         memcpy(priv->ucode_boot.v_addr, src, len);
2392
2393         /* We have our copies now, allow OS release its copies */
2394         release_firmware(ucode_raw);
2395         return 0;
2396
2397  err_pci_alloc:
2398         IWL_ERR(priv, "failed to allocate pci memory\n");
2399         ret = -ENOMEM;
2400         iwl3945_dealloc_ucode_pci(priv);
2401
2402  err_release:
2403         release_firmware(ucode_raw);
2404
2405  error:
2406         return ret;
2407 }
2408
2409
2410 /**
2411  * iwl3945_set_ucode_ptrs - Set uCode address location
2412  *
2413  * Tell initialization uCode where to find runtime uCode.
2414  *
2415  * BSM registers initially contain pointers to initialization uCode.
2416  * We need to replace them to load runtime uCode inst and data,
2417  * and to save runtime data when powering down.
2418  */
2419 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2420 {
2421         dma_addr_t pinst;
2422         dma_addr_t pdata;
2423
2424         /* bits 31:0 for 3945 */
2425         pinst = priv->ucode_code.p_addr;
2426         pdata = priv->ucode_data_backup.p_addr;
2427
2428         /* Tell bootstrap uCode where to find image to load */
2429         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2430         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2431         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2432                                  priv->ucode_data.len);
2433
2434         /* Inst byte count must be last to set up, bit 31 signals uCode
2435          *   that all new ptr/size info is in place */
2436         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2437                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2438
2439         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2440
2441         return 0;
2442 }
2443
2444 /**
2445  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2446  *
2447  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2448  *
2449  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2450  */
2451 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2452 {
2453         /* Check alive response for "valid" sign from uCode */
2454         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2455                 /* We had an error bringing up the hardware, so take it
2456                  * all the way back down so we can try again */
2457                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2458                 goto restart;
2459         }
2460
2461         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2462          * This is a paranoid check, because we would not have gotten the
2463          * "initialize" alive if code weren't properly loaded.  */
2464         if (iwl3945_verify_ucode(priv)) {
2465                 /* Runtime instruction load was bad;
2466                  * take it all the way back down so we can try again */
2467                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2468                 goto restart;
2469         }
2470
2471         /* Send pointers to protocol/runtime uCode image ... init code will
2472          * load and launch runtime uCode, which will send us another "Alive"
2473          * notification. */
2474         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2475         if (iwl3945_set_ucode_ptrs(priv)) {
2476                 /* Runtime instruction load won't happen;
2477                  * take it all the way back down so we can try again */
2478                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2479                 goto restart;
2480         }
2481         return;
2482
2483  restart:
2484         queue_work(priv->workqueue, &priv->restart);
2485 }
2486
2487 /**
2488  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2489  *                   from protocol/runtime uCode (initialization uCode's
2490  *                   Alive gets handled by iwl3945_init_alive_start()).
2491  */
2492 static void iwl3945_alive_start(struct iwl_priv *priv)
2493 {
2494         int thermal_spin = 0;
2495         u32 rfkill;
2496
2497         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2498
2499         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2500                 /* We had an error bringing up the hardware, so take it
2501                  * all the way back down so we can try again */
2502                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2503                 goto restart;
2504         }
2505
2506         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2507          * This is a paranoid check, because we would not have gotten the
2508          * "runtime" alive if code weren't properly loaded.  */
2509         if (iwl3945_verify_ucode(priv)) {
2510                 /* Runtime instruction load was bad;
2511                  * take it all the way back down so we can try again */
2512                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2513                 goto restart;
2514         }
2515
2516         iwl_clear_stations_table(priv);
2517
2518         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2519         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2520
2521         if (rfkill & 0x1) {
2522                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2523                 /* if RFKILL is not on, then wait for thermal
2524                  * sensor in adapter to kick in */
2525                 while (iwl3945_hw_get_temperature(priv) == 0) {
2526                         thermal_spin++;
2527                         udelay(10);
2528                 }
2529
2530                 if (thermal_spin)
2531                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2532                                        thermal_spin * 10);
2533         } else
2534                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2535
2536         /* After the ALIVE response, we can send commands to 3945 uCode */
2537         set_bit(STATUS_ALIVE, &priv->status);
2538
2539         if (iwl_is_rfkill(priv))
2540                 return;
2541
2542         ieee80211_wake_queues(priv->hw);
2543
2544         priv->active_rate = priv->rates_mask;
2545         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2546
2547         iwl_power_update_mode(priv, true);
2548
2549         if (iwl_is_associated(priv)) {
2550                 struct iwl3945_rxon_cmd *active_rxon =
2551                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2552
2553                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2554                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2555         } else {
2556                 /* Initialize our rx_config data */
2557                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2558         }
2559
2560         /* Configure Bluetooth device coexistence support */
2561         iwl_send_bt_config(priv);
2562
2563         /* Configure the adapter for unassociated operation */
2564         iwlcore_commit_rxon(priv);
2565
2566         iwl3945_reg_txpower_periodic(priv);
2567
2568         iwl_leds_init(priv);
2569
2570         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2571         set_bit(STATUS_READY, &priv->status);
2572         wake_up_interruptible(&priv->wait_command_queue);
2573
2574         /* reassociate for ADHOC mode */
2575         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2576                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2577                                                                 priv->vif);
2578                 if (beacon)
2579                         iwl_mac_beacon_update(priv->hw, beacon);
2580         }
2581
2582         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2583                 iwl_set_mode(priv, priv->iw_mode);
2584
2585         return;
2586
2587  restart:
2588         queue_work(priv->workqueue, &priv->restart);
2589 }
2590
2591 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2592
2593 static void __iwl3945_down(struct iwl_priv *priv)
2594 {
2595         unsigned long flags;
2596         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2597         struct ieee80211_conf *conf = NULL;
2598
2599         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2600
2601         conf = ieee80211_get_hw_conf(priv->hw);
2602
2603         if (!exit_pending)
2604                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2605
2606         iwl_clear_stations_table(priv);
2607
2608         /* Unblock any waiting calls */
2609         wake_up_interruptible_all(&priv->wait_command_queue);
2610
2611         /* Wipe out the EXIT_PENDING status bit if we are not actually
2612          * exiting the module */
2613         if (!exit_pending)
2614                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2615
2616         /* stop and reset the on-board processor */
2617         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2618
2619         /* tell the device to stop sending interrupts */
2620         spin_lock_irqsave(&priv->lock, flags);
2621         iwl_disable_interrupts(priv);
2622         spin_unlock_irqrestore(&priv->lock, flags);
2623         iwl_synchronize_irq(priv);
2624
2625         if (priv->mac80211_registered)
2626                 ieee80211_stop_queues(priv->hw);
2627
2628         /* If we have not previously called iwl3945_init() then
2629          * clear all bits but the RF Kill bits and return */
2630         if (!iwl_is_init(priv)) {
2631                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2632                                         STATUS_RF_KILL_HW |
2633                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2634                                         STATUS_GEO_CONFIGURED |
2635                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2636                                         STATUS_EXIT_PENDING;
2637                 goto exit;
2638         }
2639
2640         /* ...otherwise clear out all the status bits but the RF Kill
2641          * bit and continue taking the NIC down. */
2642         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2643                                 STATUS_RF_KILL_HW |
2644                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2645                                 STATUS_GEO_CONFIGURED |
2646                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2647                                 STATUS_FW_ERROR |
2648                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2649                                 STATUS_EXIT_PENDING;
2650
2651         iwl3945_hw_txq_ctx_stop(priv);
2652         iwl3945_hw_rxq_stop(priv);
2653
2654         /* Power-down device's busmaster DMA clocks */
2655         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2656         udelay(5);
2657
2658         /* Stop the device, and put it in low power state */
2659         priv->cfg->ops->lib->apm_ops.stop(priv);
2660
2661  exit:
2662         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2663
2664         if (priv->ibss_beacon)
2665                 dev_kfree_skb(priv->ibss_beacon);
2666         priv->ibss_beacon = NULL;
2667
2668         /* clear out any free frames */
2669         iwl3945_clear_free_frames(priv);
2670 }
2671
2672 static void iwl3945_down(struct iwl_priv *priv)
2673 {
2674         mutex_lock(&priv->mutex);
2675         __iwl3945_down(priv);
2676         mutex_unlock(&priv->mutex);
2677
2678         iwl3945_cancel_deferred_work(priv);
2679 }
2680
2681 #define MAX_HW_RESTARTS 5
2682
2683 static int __iwl3945_up(struct iwl_priv *priv)
2684 {
2685         int rc, i;
2686
2687         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2688                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2689                 return -EIO;
2690         }
2691
2692         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2693                 IWL_ERR(priv, "ucode not available for device bring up\n");
2694                 return -EIO;
2695         }
2696
2697         /* If platform's RF_KILL switch is NOT set to KILL */
2698         if (iwl_read32(priv, CSR_GP_CNTRL) &
2699                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2700                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2701         else {
2702                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2703                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2704                 return -ENODEV;
2705         }
2706
2707         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2708
2709         rc = iwl3945_hw_nic_init(priv);
2710         if (rc) {
2711                 IWL_ERR(priv, "Unable to int nic\n");
2712                 return rc;
2713         }
2714
2715         /* make sure rfkill handshake bits are cleared */
2716         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2717         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2718                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2719
2720         /* clear (again), then enable host interrupts */
2721         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2722         iwl_enable_interrupts(priv);
2723
2724         /* really make sure rfkill handshake bits are cleared */
2725         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2726         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2727
2728         /* Copy original ucode data image from disk into backup cache.
2729          * This will be used to initialize the on-board processor's
2730          * data SRAM for a clean start when the runtime program first loads. */
2731         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2732                priv->ucode_data.len);
2733
2734         /* We return success when we resume from suspend and rf_kill is on. */
2735         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2736                 return 0;
2737
2738         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2739
2740                 iwl_clear_stations_table(priv);
2741
2742                 /* load bootstrap state machine,
2743                  * load bootstrap program into processor's memory,
2744                  * prepare to load the "initialize" uCode */
2745                 priv->cfg->ops->lib->load_ucode(priv);
2746
2747                 if (rc) {
2748                         IWL_ERR(priv,
2749                                 "Unable to set up bootstrap uCode: %d\n", rc);
2750                         continue;
2751                 }
2752
2753                 /* start card; "initialize" will load runtime ucode */
2754                 iwl3945_nic_start(priv);
2755
2756                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2757
2758                 return 0;
2759         }
2760
2761         set_bit(STATUS_EXIT_PENDING, &priv->status);
2762         __iwl3945_down(priv);
2763         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2764
2765         /* tried to restart and config the device for as long as our
2766          * patience could withstand */
2767         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2768         return -EIO;
2769 }
2770
2771
2772 /*****************************************************************************
2773  *
2774  * Workqueue callbacks
2775  *
2776  *****************************************************************************/
2777
2778 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2779 {
2780         struct iwl_priv *priv =
2781             container_of(data, struct iwl_priv, init_alive_start.work);
2782
2783         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2784                 return;
2785
2786         mutex_lock(&priv->mutex);
2787         iwl3945_init_alive_start(priv);
2788         mutex_unlock(&priv->mutex);
2789 }
2790
2791 static void iwl3945_bg_alive_start(struct work_struct *data)
2792 {
2793         struct iwl_priv *priv =
2794             container_of(data, struct iwl_priv, alive_start.work);
2795
2796         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2797                 return;
2798
2799         mutex_lock(&priv->mutex);
2800         iwl3945_alive_start(priv);
2801         mutex_unlock(&priv->mutex);
2802 }
2803
2804 /*
2805  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2806  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2807  * *is* readable even when device has been SW_RESET into low power mode
2808  * (e.g. during RF KILL).
2809  */
2810 static void iwl3945_rfkill_poll(struct work_struct *data)
2811 {
2812         struct iwl_priv *priv =
2813             container_of(data, struct iwl_priv, rfkill_poll.work);
2814         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2815         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2816                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2817
2818         if (new_rfkill != old_rfkill) {
2819                 if (new_rfkill)
2820                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2821                 else
2822                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2823
2824                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2825
2826                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2827                                 new_rfkill ? "disable radio" : "enable radio");
2828         }
2829
2830         /* Keep this running, even if radio now enabled.  This will be
2831          * cancelled in mac_start() if system decides to start again */
2832         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2833                            round_jiffies_relative(2 * HZ));
2834
2835 }
2836
2837 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2838 static void iwl3945_bg_request_scan(struct work_struct *data)
2839 {
2840         struct iwl_priv *priv =
2841             container_of(data, struct iwl_priv, request_scan);
2842         struct iwl_host_cmd cmd = {
2843                 .id = REPLY_SCAN_CMD,
2844                 .len = sizeof(struct iwl3945_scan_cmd),
2845                 .flags = CMD_SIZE_HUGE,
2846         };
2847         int rc = 0;
2848         struct iwl3945_scan_cmd *scan;
2849         struct ieee80211_conf *conf = NULL;
2850         u8 n_probes = 0;
2851         enum ieee80211_band band;
2852         bool is_active = false;
2853
2854         conf = ieee80211_get_hw_conf(priv->hw);
2855
2856         mutex_lock(&priv->mutex);
2857
2858         cancel_delayed_work(&priv->scan_check);
2859
2860         if (!iwl_is_ready(priv)) {
2861                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2862                 goto done;
2863         }
2864
2865         /* Make sure the scan wasn't canceled before this queued work
2866          * was given the chance to run... */
2867         if (!test_bit(STATUS_SCANNING, &priv->status))
2868                 goto done;
2869
2870         /* This should never be called or scheduled if there is currently
2871          * a scan active in the hardware. */
2872         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2873                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2874                                 "Ignoring second request.\n");
2875                 rc = -EIO;
2876                 goto done;
2877         }
2878
2879         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2880                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2881                 goto done;
2882         }
2883
2884         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2885                 IWL_DEBUG_HC(priv,
2886                         "Scan request while abort pending. Queuing.\n");
2887                 goto done;
2888         }
2889
2890         if (iwl_is_rfkill(priv)) {
2891                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2892                 goto done;
2893         }
2894
2895         if (!test_bit(STATUS_READY, &priv->status)) {
2896                 IWL_DEBUG_HC(priv,
2897                         "Scan request while uninitialized. Queuing.\n");
2898                 goto done;
2899         }
2900
2901         if (!priv->scan_bands) {
2902                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2903                 goto done;
2904         }
2905
2906         if (!priv->scan) {
2907                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2908                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2909                 if (!priv->scan) {
2910                         rc = -ENOMEM;
2911                         goto done;
2912                 }
2913         }
2914         scan = priv->scan;
2915         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2916
2917         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2918         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2919
2920         if (iwl_is_associated(priv)) {
2921                 u16 interval = 0;
2922                 u32 extra;
2923                 u32 suspend_time = 100;
2924                 u32 scan_suspend_time = 100;
2925                 unsigned long flags;
2926
2927                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2928
2929                 spin_lock_irqsave(&priv->lock, flags);
2930                 interval = priv->beacon_int;
2931                 spin_unlock_irqrestore(&priv->lock, flags);
2932
2933                 scan->suspend_time = 0;
2934                 scan->max_out_time = cpu_to_le32(200 * 1024);
2935                 if (!interval)
2936                         interval = suspend_time;
2937                 /*
2938                  * suspend time format:
2939                  *  0-19: beacon interval in usec (time before exec.)
2940                  * 20-23: 0
2941                  * 24-31: number of beacons (suspend between channels)
2942                  */
2943
2944                 extra = (suspend_time / interval) << 24;
2945                 scan_suspend_time = 0xFF0FFFFF &
2946                     (extra | ((suspend_time % interval) * 1024));
2947
2948                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2949                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2950                                scan_suspend_time, interval);
2951         }
2952
2953         if (priv->scan_request->n_ssids) {
2954                 int i, p = 0;
2955                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2956                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2957                         /* always does wildcard anyway */
2958                         if (!priv->scan_request->ssids[i].ssid_len)
2959                                 continue;
2960                         scan->direct_scan[p].id = WLAN_EID_SSID;
2961                         scan->direct_scan[p].len =
2962                                 priv->scan_request->ssids[i].ssid_len;
2963                         memcpy(scan->direct_scan[p].ssid,
2964                                priv->scan_request->ssids[i].ssid,
2965                                priv->scan_request->ssids[i].ssid_len);
2966                         n_probes++;
2967                         p++;
2968                 }
2969                 is_active = true;
2970         } else
2971                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2972
2973         /* We don't build a direct scan probe request; the uCode will do
2974          * that based on the direct_mask added to each channel entry */
2975         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2976         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2977         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2978
2979         /* flags + rate selection */
2980
2981         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2982                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2983                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2984                 scan->good_CRC_th = 0;
2985                 band = IEEE80211_BAND_2GHZ;
2986         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2987                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2988                 /*
2989                  * If active scaning is requested but a certain channel
2990                  * is marked passive, we can do active scanning if we
2991                  * detect transmissions.
2992                  */
2993                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2994                 band = IEEE80211_BAND_5GHZ;
2995         } else {
2996                 IWL_WARN(priv, "Invalid scan band count\n");
2997                 goto done;
2998         }
2999
3000         scan->tx_cmd.len = cpu_to_le16(
3001                         iwl_fill_probe_req(priv,
3002                                 (struct ieee80211_mgmt *)scan->data,
3003                                 priv->scan_request->ie,
3004                                 priv->scan_request->ie_len,
3005                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
3006
3007         /* select Rx antennas */
3008         scan->flags |= iwl3945_get_antenna_flags(priv);
3009
3010         if (iwl_is_monitor_mode(priv))
3011                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3012
3013         scan->channel_count =
3014                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3015                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3016
3017         if (scan->channel_count == 0) {
3018                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3019                 goto done;
3020         }
3021
3022         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3023             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3024         cmd.data = scan;
3025         scan->len = cpu_to_le16(cmd.len);
3026
3027         set_bit(STATUS_SCAN_HW, &priv->status);
3028         rc = iwl_send_cmd_sync(priv, &cmd);
3029         if (rc)
3030                 goto done;
3031
3032         queue_delayed_work(priv->workqueue, &priv->scan_check,
3033                            IWL_SCAN_CHECK_WATCHDOG);
3034
3035         mutex_unlock(&priv->mutex);
3036         return;
3037
3038  done:
3039         /* can not perform scan make sure we clear scanning
3040          * bits from status so next scan request can be performed.
3041          * if we dont clear scanning status bit here all next scan
3042          * will fail
3043         */
3044         clear_bit(STATUS_SCAN_HW, &priv->status);
3045         clear_bit(STATUS_SCANNING, &priv->status);
3046
3047         /* inform mac80211 scan aborted */
3048         queue_work(priv->workqueue, &priv->scan_completed);
3049         mutex_unlock(&priv->mutex);
3050 }
3051
3052 static void iwl3945_bg_up(struct work_struct *data)
3053 {
3054         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3055
3056         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3057                 return;
3058
3059         mutex_lock(&priv->mutex);
3060         __iwl3945_up(priv);
3061         mutex_unlock(&priv->mutex);
3062 }
3063
3064 static void iwl3945_bg_restart(struct work_struct *data)
3065 {
3066         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3067
3068         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3069                 return;
3070
3071         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3072                 mutex_lock(&priv->mutex);
3073                 priv->vif = NULL;
3074                 priv->is_open = 0;
3075                 mutex_unlock(&priv->mutex);
3076                 iwl3945_down(priv);
3077                 ieee80211_restart_hw(priv->hw);
3078         } else {
3079                 iwl3945_down(priv);
3080                 queue_work(priv->workqueue, &priv->up);
3081         }
3082 }
3083
3084 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3085 {
3086         struct iwl_priv *priv =
3087             container_of(data, struct iwl_priv, rx_replenish);
3088
3089         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3090                 return;
3091
3092         mutex_lock(&priv->mutex);
3093         iwl3945_rx_replenish(priv);
3094         mutex_unlock(&priv->mutex);
3095 }
3096
3097 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3098
3099 void iwl3945_post_associate(struct iwl_priv *priv)
3100 {
3101         int rc = 0;
3102         struct ieee80211_conf *conf = NULL;
3103
3104         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3105                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3106                 return;
3107         }
3108
3109
3110         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3111                         priv->assoc_id, priv->active_rxon.bssid_addr);
3112
3113         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3114                 return;
3115
3116         if (!priv->vif || !priv->is_open)
3117                 return;
3118
3119         iwl_scan_cancel_timeout(priv, 200);
3120
3121         conf = ieee80211_get_hw_conf(priv->hw);
3122
3123         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3124         iwlcore_commit_rxon(priv);
3125
3126         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3127         iwl_setup_rxon_timing(priv);
3128         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3129                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3130         if (rc)
3131                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3132                             "Attempting to continue.\n");
3133
3134         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3135
3136         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3137
3138         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3139                         priv->assoc_id, priv->beacon_int);
3140
3141         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3142                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3143         else
3144                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3145
3146         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3147                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3148                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3149                 else
3150                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3151
3152                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3153                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3154
3155         }
3156
3157         iwlcore_commit_rxon(priv);
3158
3159         switch (priv->iw_mode) {
3160         case NL80211_IFTYPE_STATION:
3161                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3162                 break;
3163
3164         case NL80211_IFTYPE_ADHOC:
3165
3166                 priv->assoc_id = 1;
3167                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3168                 iwl3945_sync_sta(priv, IWL_STA_ID,
3169                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3170                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3171                                  CMD_ASYNC);
3172                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3173                 iwl3945_send_beacon_cmd(priv);
3174
3175                 break;
3176
3177         default:
3178                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3179                            __func__, priv->iw_mode);
3180                 break;
3181         }
3182
3183         iwl_activate_qos(priv, 0);
3184
3185         /* we have just associated, don't start scan too early */
3186         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3187 }
3188
3189 /*****************************************************************************
3190  *
3191  * mac80211 entry point functions
3192  *
3193  *****************************************************************************/
3194
3195 #define UCODE_READY_TIMEOUT     (2 * HZ)
3196
3197 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3198 {
3199         struct iwl_priv *priv = hw->priv;
3200         int ret;
3201
3202         IWL_DEBUG_MAC80211(priv, "enter\n");
3203
3204         /* we should be verifying the device is ready to be opened */
3205         mutex_lock(&priv->mutex);
3206
3207         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3208          * ucode filename and max sizes are card-specific. */
3209
3210         if (!priv->ucode_code.len) {
3211                 ret = iwl3945_read_ucode(priv);
3212                 if (ret) {
3213                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3214                         mutex_unlock(&priv->mutex);
3215                         goto out_release_irq;
3216                 }
3217         }
3218
3219         ret = __iwl3945_up(priv);
3220
3221         mutex_unlock(&priv->mutex);
3222
3223         if (ret)
3224                 goto out_release_irq;
3225
3226         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3227
3228         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3229          * mac80211 will not be run successfully. */
3230         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3231                         test_bit(STATUS_READY, &priv->status),
3232                         UCODE_READY_TIMEOUT);
3233         if (!ret) {
3234                 if (!test_bit(STATUS_READY, &priv->status)) {
3235                         IWL_ERR(priv,
3236                                 "Wait for START_ALIVE timeout after %dms.\n",
3237                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3238                         ret = -ETIMEDOUT;
3239                         goto out_release_irq;
3240                 }
3241         }
3242
3243         /* ucode is running and will send rfkill notifications,
3244          * no need to poll the killswitch state anymore */
3245         cancel_delayed_work(&priv->rfkill_poll);
3246
3247         iwl_led_start(priv);
3248
3249         priv->is_open = 1;
3250         IWL_DEBUG_MAC80211(priv, "leave\n");
3251         return 0;
3252
3253 out_release_irq:
3254         priv->is_open = 0;
3255         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3256         return ret;
3257 }
3258
3259 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3260 {
3261         struct iwl_priv *priv = hw->priv;
3262
3263         IWL_DEBUG_MAC80211(priv, "enter\n");
3264
3265         if (!priv->is_open) {
3266                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3267                 return;
3268         }
3269
3270         priv->is_open = 0;
3271
3272         if (iwl_is_ready_rf(priv)) {
3273                 /* stop mac, cancel any scan request and clear
3274                  * RXON_FILTER_ASSOC_MSK BIT
3275                  */
3276                 mutex_lock(&priv->mutex);
3277                 iwl_scan_cancel_timeout(priv, 100);
3278                 mutex_unlock(&priv->mutex);
3279         }
3280
3281         iwl3945_down(priv);
3282
3283         flush_workqueue(priv->workqueue);
3284
3285         /* start polling the killswitch state again */
3286         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3287                            round_jiffies_relative(2 * HZ));
3288
3289         IWL_DEBUG_MAC80211(priv, "leave\n");
3290 }
3291
3292 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3293 {
3294         struct iwl_priv *priv = hw->priv;
3295
3296         IWL_DEBUG_MAC80211(priv, "enter\n");
3297
3298         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3299                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3300
3301         if (iwl3945_tx_skb(priv, skb))
3302                 dev_kfree_skb_any(skb);
3303
3304         IWL_DEBUG_MAC80211(priv, "leave\n");
3305         return NETDEV_TX_OK;
3306 }
3307
3308 void iwl3945_config_ap(struct iwl_priv *priv)
3309 {
3310         int rc = 0;
3311
3312         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3313                 return;
3314
3315         /* The following should be done only at AP bring up */
3316         if (!(iwl_is_associated(priv))) {
3317
3318                 /* RXON - unassoc (to set timing command) */
3319                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3320                 iwlcore_commit_rxon(priv);
3321
3322                 /* RXON Timing */
3323                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3324                 iwl_setup_rxon_timing(priv);
3325                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3326                                       sizeof(priv->rxon_timing),
3327                                       &priv->rxon_timing);
3328                 if (rc)
3329                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3330                                         "Attempting to continue.\n");
3331
3332                 /* FIXME: what should be the assoc_id for AP? */
3333                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3334                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3335                         priv->staging_rxon.flags |=
3336                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3337                 else
3338                         priv->staging_rxon.flags &=
3339                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3340
3341                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3342                         if (priv->assoc_capability &
3343                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3344                                 priv->staging_rxon.flags |=
3345                                         RXON_FLG_SHORT_SLOT_MSK;
3346                         else
3347                                 priv->staging_rxon.flags &=
3348                                         ~RXON_FLG_SHORT_SLOT_MSK;
3349
3350                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3351                                 priv->staging_rxon.flags &=
3352                                         ~RXON_FLG_SHORT_SLOT_MSK;
3353                 }
3354                 /* restore RXON assoc */
3355                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3356                 iwlcore_commit_rxon(priv);
3357                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3358         }
3359         iwl3945_send_beacon_cmd(priv);
3360
3361         /* FIXME - we need to add code here to detect a totally new
3362          * configuration, reset the AP, unassoc, rxon timing, assoc,
3363          * clear sta table, add BCAST sta... */
3364 }
3365
3366 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3367                                struct ieee80211_vif *vif,
3368                                struct ieee80211_sta *sta,
3369                                struct ieee80211_key_conf *key)
3370 {
3371         struct iwl_priv *priv = hw->priv;
3372         const u8 *addr;
3373         int ret = 0;
3374         u8 sta_id = IWL_INVALID_STATION;
3375         u8 static_key;
3376
3377         IWL_DEBUG_MAC80211(priv, "enter\n");
3378
3379         if (iwl3945_mod_params.sw_crypto) {
3380                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3381                 return -EOPNOTSUPP;
3382         }
3383
3384         addr = sta ? sta->addr : iwl_bcast_addr;
3385         static_key = !iwl_is_associated(priv);
3386
3387         if (!static_key) {
3388                 sta_id = iwl_find_station(priv, addr);
3389                 if (sta_id == IWL_INVALID_STATION) {
3390                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3391                                             addr);
3392                         return -EINVAL;
3393                 }
3394         }
3395
3396         mutex_lock(&priv->mutex);
3397         iwl_scan_cancel_timeout(priv, 100);
3398         mutex_unlock(&priv->mutex);
3399
3400         switch (cmd) {
3401         case SET_KEY:
3402                 if (static_key)
3403                         ret = iwl3945_set_static_key(priv, key);
3404                 else
3405                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3406                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3407                 break;
3408         case DISABLE_KEY:
3409                 if (static_key)
3410                         ret = iwl3945_remove_static_key(priv);
3411                 else
3412                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3413                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3414                 break;
3415         default:
3416                 ret = -EINVAL;
3417         }
3418
3419         IWL_DEBUG_MAC80211(priv, "leave\n");
3420
3421         return ret;
3422 }
3423
3424 /*****************************************************************************
3425  *
3426  * sysfs attributes
3427  *
3428  *****************************************************************************/
3429
3430 #ifdef CONFIG_IWLWIFI_DEBUG
3431
3432 /*
3433  * The following adds a new attribute to the sysfs representation
3434  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3435  * used for controlling the debug level.
3436  *
3437  * See the level definitions in iwl for details.
3438  *
3439  * The debug_level being managed using sysfs below is a per device debug
3440  * level that is used instead of the global debug level if it (the per
3441  * device debug level) is set.
3442  */
3443 static ssize_t show_debug_level(struct device *d,
3444                                 struct device_attribute *attr, char *buf)
3445 {
3446         struct iwl_priv *priv = dev_get_drvdata(d);
3447         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3448 }
3449 static ssize_t store_debug_level(struct device *d,
3450                                 struct device_attribute *attr,
3451                                  const char *buf, size_t count)
3452 {
3453         struct iwl_priv *priv = dev_get_drvdata(d);
3454         unsigned long val;
3455         int ret;
3456
3457         ret = strict_strtoul(buf, 0, &val);
3458         if (ret)
3459                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3460         else {
3461                 priv->debug_level = val;
3462                 if (iwl_alloc_traffic_mem(priv))
3463                         IWL_ERR(priv,
3464                                 "Not enough memory to generate traffic log\n");
3465         }
3466         return strnlen(buf, count);
3467 }
3468
3469 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3470                         show_debug_level, store_debug_level);
3471
3472 #endif /* CONFIG_IWLWIFI_DEBUG */
3473
3474 static ssize_t show_temperature(struct device *d,
3475                                 struct device_attribute *attr, char *buf)
3476 {
3477         struct iwl_priv *priv = dev_get_drvdata(d);
3478
3479         if (!iwl_is_alive(priv))
3480                 return -EAGAIN;
3481
3482         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3483 }
3484
3485 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3486
3487 static ssize_t show_tx_power(struct device *d,
3488                              struct device_attribute *attr, char *buf)
3489 {
3490         struct iwl_priv *priv = dev_get_drvdata(d);
3491         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3492 }
3493
3494 static ssize_t store_tx_power(struct device *d,
3495                               struct device_attribute *attr,
3496                               const char *buf, size_t count)
3497 {
3498         struct iwl_priv *priv = dev_get_drvdata(d);
3499         char *p = (char *)buf;
3500         u32 val;
3501
3502         val = simple_strtoul(p, &p, 10);
3503         if (p == buf)
3504                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3505         else
3506                 iwl3945_hw_reg_set_txpower(priv, val);
3507
3508         return count;
3509 }
3510
3511 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3512
3513 static ssize_t show_flags(struct device *d,
3514                           struct device_attribute *attr, char *buf)
3515 {
3516         struct iwl_priv *priv = dev_get_drvdata(d);
3517
3518         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3519 }
3520
3521 static ssize_t store_flags(struct device *d,
3522                            struct device_attribute *attr,
3523                            const char *buf, size_t count)
3524 {
3525         struct iwl_priv *priv = dev_get_drvdata(d);
3526         u32 flags = simple_strtoul(buf, NULL, 0);
3527
3528         mutex_lock(&priv->mutex);
3529         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3530                 /* Cancel any currently running scans... */
3531                 if (iwl_scan_cancel_timeout(priv, 100))
3532                         IWL_WARN(priv, "Could not cancel scan.\n");
3533                 else {
3534                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3535                                        flags);
3536                         priv->staging_rxon.flags = cpu_to_le32(flags);
3537                         iwlcore_commit_rxon(priv);
3538                 }
3539         }
3540         mutex_unlock(&priv->mutex);
3541
3542         return count;
3543 }
3544
3545 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3546
3547 static ssize_t show_filter_flags(struct device *d,
3548                                  struct device_attribute *attr, char *buf)
3549 {
3550         struct iwl_priv *priv = dev_get_drvdata(d);
3551
3552         return sprintf(buf, "0x%04X\n",
3553                 le32_to_cpu(priv->active_rxon.filter_flags));
3554 }
3555
3556 static ssize_t store_filter_flags(struct device *d,
3557                                   struct device_attribute *attr,
3558                                   const char *buf, size_t count)
3559 {
3560         struct iwl_priv *priv = dev_get_drvdata(d);
3561         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3562
3563         mutex_lock(&priv->mutex);
3564         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3565                 /* Cancel any currently running scans... */
3566                 if (iwl_scan_cancel_timeout(priv, 100))
3567                         IWL_WARN(priv, "Could not cancel scan.\n");
3568                 else {
3569                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3570                                        "0x%04X\n", filter_flags);
3571                         priv->staging_rxon.filter_flags =
3572                                 cpu_to_le32(filter_flags);
3573                         iwlcore_commit_rxon(priv);
3574                 }
3575         }
3576         mutex_unlock(&priv->mutex);
3577
3578         return count;
3579 }
3580
3581 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3582                    store_filter_flags);
3583
3584 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3585
3586 static ssize_t show_measurement(struct device *d,
3587                                 struct device_attribute *attr, char *buf)
3588 {
3589         struct iwl_priv *priv = dev_get_drvdata(d);
3590         struct iwl_spectrum_notification measure_report;
3591         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3592         u8 *data = (u8 *)&measure_report;
3593         unsigned long flags;
3594
3595         spin_lock_irqsave(&priv->lock, flags);
3596         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3597                 spin_unlock_irqrestore(&priv->lock, flags);
3598                 return 0;
3599         }
3600         memcpy(&measure_report, &priv->measure_report, size);
3601         priv->measurement_status = 0;
3602         spin_unlock_irqrestore(&priv->lock, flags);
3603
3604         while (size && (PAGE_SIZE - len)) {
3605                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3606                                    PAGE_SIZE - len, 1);
3607                 len = strlen(buf);
3608                 if (PAGE_SIZE - len)
3609                         buf[len++] = '\n';
3610
3611                 ofs += 16;
3612                 size -= min(size, 16U);
3613         }
3614
3615         return len;
3616 }
3617
3618 static ssize_t store_measurement(struct device *d,
3619                                  struct device_attribute *attr,
3620                                  const char *buf, size_t count)
3621 {
3622         struct iwl_priv *priv = dev_get_drvdata(d);
3623         struct ieee80211_measurement_params params = {
3624                 .channel = le16_to_cpu(priv->active_rxon.channel),
3625                 .start_time = cpu_to_le64(priv->last_tsf),
3626                 .duration = cpu_to_le16(1),
3627         };
3628         u8 type = IWL_MEASURE_BASIC;
3629         u8 buffer[32];
3630         u8 channel;
3631
3632         if (count) {
3633                 char *p = buffer;
3634                 strncpy(buffer, buf, min(sizeof(buffer), count));
3635                 channel = simple_strtoul(p, NULL, 0);
3636                 if (channel)
3637                         params.channel = channel;
3638
3639                 p = buffer;
3640                 while (*p && *p != ' ')
3641                         p++;
3642                 if (*p)
3643                         type = simple_strtoul(p + 1, NULL, 0);
3644         }
3645
3646         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3647                        "channel %d (for '%s')\n", type, params.channel, buf);
3648         iwl3945_get_measurement(priv, &params, type);
3649
3650         return count;
3651 }
3652
3653 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3654                    show_measurement, store_measurement);
3655 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3656
3657 static ssize_t store_retry_rate(struct device *d,
3658                                 struct device_attribute *attr,
3659                                 const char *buf, size_t count)
3660 {
3661         struct iwl_priv *priv = dev_get_drvdata(d);
3662
3663         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3664         if (priv->retry_rate <= 0)
3665                 priv->retry_rate = 1;
3666
3667         return count;
3668 }
3669
3670 static ssize_t show_retry_rate(struct device *d,
3671                                struct device_attribute *attr, char *buf)
3672 {
3673         struct iwl_priv *priv = dev_get_drvdata(d);
3674         return sprintf(buf, "%d", priv->retry_rate);
3675 }
3676
3677 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3678                    store_retry_rate);
3679
3680
3681 static ssize_t show_channels(struct device *d,
3682                              struct device_attribute *attr, char *buf)
3683 {
3684         /* all this shit doesn't belong into sysfs anyway */
3685         return 0;
3686 }
3687
3688 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3689
3690 static ssize_t show_statistics(struct device *d,
3691                                struct device_attribute *attr, char *buf)
3692 {
3693         struct iwl_priv *priv = dev_get_drvdata(d);
3694         u32 size = sizeof(struct iwl3945_notif_statistics);
3695         u32 len = 0, ofs = 0;
3696         u8 *data = (u8 *)&priv->statistics_39;
3697         int rc = 0;
3698
3699         if (!iwl_is_alive(priv))
3700                 return -EAGAIN;
3701
3702         mutex_lock(&priv->mutex);
3703         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3704         mutex_unlock(&priv->mutex);
3705
3706         if (rc) {
3707                 len = sprintf(buf,
3708                               "Error sending statistics request: 0x%08X\n", rc);
3709                 return len;
3710         }
3711
3712         while (size && (PAGE_SIZE - len)) {
3713                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3714                                    PAGE_SIZE - len, 1);
3715                 len = strlen(buf);
3716                 if (PAGE_SIZE - len)
3717                         buf[len++] = '\n';
3718
3719                 ofs += 16;
3720                 size -= min(size, 16U);
3721         }
3722
3723         return len;
3724 }
3725
3726 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3727
3728 static ssize_t show_antenna(struct device *d,
3729                             struct device_attribute *attr, char *buf)
3730 {
3731         struct iwl_priv *priv = dev_get_drvdata(d);
3732
3733         if (!iwl_is_alive(priv))
3734                 return -EAGAIN;
3735
3736         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3737 }
3738
3739 static ssize_t store_antenna(struct device *d,
3740                              struct device_attribute *attr,
3741                              const char *buf, size_t count)
3742 {
3743         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3744         int ant;
3745
3746         if (count == 0)
3747                 return 0;
3748
3749         if (sscanf(buf, "%1i", &ant) != 1) {
3750                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3751                 return count;
3752         }
3753
3754         if ((ant >= 0) && (ant <= 2)) {
3755                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3756                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3757         } else
3758                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3759
3760
3761         return count;
3762 }
3763
3764 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3765
3766 static ssize_t show_status(struct device *d,
3767                            struct device_attribute *attr, char *buf)
3768 {
3769         struct iwl_priv *priv = dev_get_drvdata(d);
3770         if (!iwl_is_alive(priv))
3771                 return -EAGAIN;
3772         return sprintf(buf, "0x%08x\n", (int)priv->status);
3773 }
3774
3775 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3776
3777 static ssize_t dump_error_log(struct device *d,
3778                               struct device_attribute *attr,
3779                               const char *buf, size_t count)
3780 {
3781         struct iwl_priv *priv = dev_get_drvdata(d);
3782         char *p = (char *)buf;
3783
3784         if (p[0] == '1')
3785                 iwl3945_dump_nic_error_log(priv);
3786
3787         return strnlen(buf, count);
3788 }
3789
3790 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3791
3792 /*****************************************************************************
3793  *
3794  * driver setup and tear down
3795  *
3796  *****************************************************************************/
3797
3798 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3799 {
3800         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3801
3802         init_waitqueue_head(&priv->wait_command_queue);
3803
3804         INIT_WORK(&priv->up, iwl3945_bg_up);
3805         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3806         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3807         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3808         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3809         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3810         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3811         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3812         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3813         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3814         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3815
3816         iwl3945_hw_setup_deferred_work(priv);
3817
3818         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3819                      iwl3945_irq_tasklet, (unsigned long)priv);
3820 }
3821
3822 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3823 {
3824         iwl3945_hw_cancel_deferred_work(priv);
3825
3826         cancel_delayed_work_sync(&priv->init_alive_start);
3827         cancel_delayed_work(&priv->scan_check);
3828         cancel_delayed_work(&priv->alive_start);
3829         cancel_work_sync(&priv->beacon_update);
3830 }
3831
3832 static struct attribute *iwl3945_sysfs_entries[] = {
3833         &dev_attr_antenna.attr,
3834         &dev_attr_channels.attr,
3835         &dev_attr_dump_errors.attr,
3836         &dev_attr_flags.attr,
3837         &dev_attr_filter_flags.attr,
3838 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3839         &dev_attr_measurement.attr,
3840 #endif
3841         &dev_attr_retry_rate.attr,
3842         &dev_attr_statistics.attr,
3843         &dev_attr_status.attr,
3844         &dev_attr_temperature.attr,
3845         &dev_attr_tx_power.attr,
3846 #ifdef CONFIG_IWLWIFI_DEBUG
3847         &dev_attr_debug_level.attr,
3848 #endif
3849         NULL
3850 };
3851
3852 static struct attribute_group iwl3945_attribute_group = {
3853         .name = NULL,           /* put in device directory */
3854         .attrs = iwl3945_sysfs_entries,
3855 };
3856
3857 static struct ieee80211_ops iwl3945_hw_ops = {
3858         .tx = iwl3945_mac_tx,
3859         .start = iwl3945_mac_start,
3860         .stop = iwl3945_mac_stop,
3861         .add_interface = iwl_mac_add_interface,
3862         .remove_interface = iwl_mac_remove_interface,
3863         .config = iwl_mac_config,
3864         .configure_filter = iwl_configure_filter,
3865         .set_key = iwl3945_mac_set_key,
3866         .get_tx_stats = iwl_mac_get_tx_stats,
3867         .conf_tx = iwl_mac_conf_tx,
3868         .reset_tsf = iwl_mac_reset_tsf,
3869         .bss_info_changed = iwl_bss_info_changed,
3870         .hw_scan = iwl_mac_hw_scan
3871 };
3872
3873 static int iwl3945_init_drv(struct iwl_priv *priv)
3874 {
3875         int ret;
3876         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3877
3878         priv->retry_rate = 1;
3879         priv->ibss_beacon = NULL;
3880
3881         spin_lock_init(&priv->lock);
3882         spin_lock_init(&priv->sta_lock);
3883         spin_lock_init(&priv->hcmd_lock);
3884
3885         INIT_LIST_HEAD(&priv->free_frames);
3886
3887         mutex_init(&priv->mutex);
3888
3889         /* Clear the driver's (not device's) station table */
3890         iwl_clear_stations_table(priv);
3891
3892         priv->ieee_channels = NULL;
3893         priv->ieee_rates = NULL;
3894         priv->band = IEEE80211_BAND_2GHZ;
3895
3896         priv->iw_mode = NL80211_IFTYPE_STATION;
3897
3898         iwl_reset_qos(priv);
3899
3900         priv->qos_data.qos_active = 0;
3901         priv->qos_data.qos_cap.val = 0;
3902
3903         priv->rates_mask = IWL_RATES_MASK;
3904         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3905
3906         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3907                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3908                          eeprom->version);
3909                 ret = -EINVAL;
3910                 goto err;
3911         }
3912         ret = iwl_init_channel_map(priv);
3913         if (ret) {
3914                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3915                 goto err;
3916         }
3917
3918         /* Set up txpower settings in driver for all channels */
3919         if (iwl3945_txpower_set_from_eeprom(priv)) {
3920                 ret = -EIO;
3921                 goto err_free_channel_map;
3922         }
3923
3924         ret = iwlcore_init_geos(priv);
3925         if (ret) {
3926                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3927                 goto err_free_channel_map;
3928         }
3929         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3930
3931         return 0;
3932
3933 err_free_channel_map:
3934         iwl_free_channel_map(priv);
3935 err:
3936         return ret;
3937 }
3938
3939 static int iwl3945_setup_mac(struct iwl_priv *priv)
3940 {
3941         int ret;
3942         struct ieee80211_hw *hw = priv->hw;
3943
3944         hw->rate_control_algorithm = "iwl-3945-rs";
3945         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3946
3947         /* Tell mac80211 our characteristics */
3948         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3949                     IEEE80211_HW_NOISE_DBM |
3950                     IEEE80211_HW_SPECTRUM_MGMT |
3951                     IEEE80211_HW_SUPPORTS_PS |
3952                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3953
3954         hw->wiphy->interface_modes =
3955                 BIT(NL80211_IFTYPE_STATION) |
3956                 BIT(NL80211_IFTYPE_ADHOC);
3957
3958         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
3959                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3960
3961         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3962         /* we create the 802.11 header and a zero-length SSID element */
3963         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3964
3965         /* Default value; 4 EDCA QOS priorities */
3966         hw->queues = 4;
3967
3968         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3969                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3970                         &priv->bands[IEEE80211_BAND_2GHZ];
3971
3972         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3973                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3974                         &priv->bands[IEEE80211_BAND_5GHZ];
3975
3976         ret = ieee80211_register_hw(priv->hw);
3977         if (ret) {
3978                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3979                 return ret;
3980         }
3981         priv->mac80211_registered = 1;
3982
3983         return 0;
3984 }
3985
3986 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3987 {
3988         int err = 0;
3989         struct iwl_priv *priv;
3990         struct ieee80211_hw *hw;
3991         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3992         struct iwl3945_eeprom *eeprom;
3993         unsigned long flags;
3994
3995         /***********************
3996          * 1. Allocating HW data
3997          * ********************/
3998
3999         /* mac80211 allocates memory for this device instance, including
4000          *   space for this driver's private structure */
4001         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
4002         if (hw == NULL) {
4003                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
4004                 err = -ENOMEM;
4005                 goto out;
4006         }
4007         priv = hw->priv;
4008         SET_IEEE80211_DEV(hw, &pdev->dev);
4009
4010         /*
4011          * Disabling hardware scan means that mac80211 will perform scans
4012          * "the hard way", rather than using device's scan.
4013          */
4014         if (iwl3945_mod_params.disable_hw_scan) {
4015                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4016                 iwl3945_hw_ops.hw_scan = NULL;
4017         }
4018
4019
4020         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4021         priv->cfg = cfg;
4022         priv->pci_dev = pdev;
4023         priv->inta_mask = CSR_INI_SET_MASK;
4024
4025 #ifdef CONFIG_IWLWIFI_DEBUG
4026         atomic_set(&priv->restrict_refcnt, 0);
4027 #endif
4028         if (iwl_alloc_traffic_mem(priv))
4029                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4030
4031         /***************************
4032          * 2. Initializing PCI bus
4033          * *************************/
4034         if (pci_enable_device(pdev)) {
4035                 err = -ENODEV;
4036                 goto out_ieee80211_free_hw;
4037         }
4038
4039         pci_set_master(pdev);
4040
4041         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4042         if (!err)
4043                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4044         if (err) {
4045                 IWL_WARN(priv, "No suitable DMA available.\n");
4046                 goto out_pci_disable_device;
4047         }
4048
4049         pci_set_drvdata(pdev, priv);
4050         err = pci_request_regions(pdev, DRV_NAME);
4051         if (err)
4052                 goto out_pci_disable_device;
4053
4054         /***********************
4055          * 3. Read REV Register
4056          * ********************/
4057         priv->hw_base = pci_iomap(pdev, 0, 0);
4058         if (!priv->hw_base) {
4059                 err = -ENODEV;
4060                 goto out_pci_release_regions;
4061         }
4062
4063         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4064                         (unsigned long long) pci_resource_len(pdev, 0));
4065         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4066
4067         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4068          * PCI Tx retries from interfering with C3 CPU state */
4069         pci_write_config_byte(pdev, 0x41, 0x00);
4070
4071         /* this spin lock will be used in apm_ops.init and EEPROM access
4072          * we should init now
4073          */
4074         spin_lock_init(&priv->reg_lock);
4075
4076         /***********************
4077          * 4. Read EEPROM
4078          * ********************/
4079
4080         /* Read the EEPROM */
4081         err = iwl_eeprom_init(priv);
4082         if (err) {
4083                 IWL_ERR(priv, "Unable to init EEPROM\n");
4084                 goto out_iounmap;
4085         }
4086         /* MAC Address location in EEPROM same for 3945/4965 */
4087         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4088         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4089         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4090         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4091
4092         /***********************
4093          * 5. Setup HW Constants
4094          * ********************/
4095         /* Device-specific setup */
4096         if (iwl3945_hw_set_hw_params(priv)) {
4097                 IWL_ERR(priv, "failed to set hw settings\n");
4098                 goto out_eeprom_free;
4099         }
4100
4101         /***********************
4102          * 6. Setup priv
4103          * ********************/
4104
4105         err = iwl3945_init_drv(priv);
4106         if (err) {
4107                 IWL_ERR(priv, "initializing driver failed\n");
4108                 goto out_unset_hw_params;
4109         }
4110
4111         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4112                 priv->cfg->name);
4113
4114         /***********************
4115          * 7. Setup Services
4116          * ********************/
4117
4118         spin_lock_irqsave(&priv->lock, flags);
4119         iwl_disable_interrupts(priv);
4120         spin_unlock_irqrestore(&priv->lock, flags);
4121
4122         pci_enable_msi(priv->pci_dev);
4123
4124         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4125                           IRQF_SHARED, DRV_NAME, priv);
4126         if (err) {
4127                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4128                 goto out_disable_msi;
4129         }
4130
4131         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4132         if (err) {
4133                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4134                 goto out_release_irq;
4135         }
4136
4137         iwl_set_rxon_channel(priv,
4138                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4139         iwl3945_setup_deferred_work(priv);
4140         iwl3945_setup_rx_handlers(priv);
4141         iwl_power_initialize(priv);
4142
4143         /*********************************
4144          * 8. Setup and Register mac80211
4145          * *******************************/
4146
4147         iwl_enable_interrupts(priv);
4148
4149         err = iwl3945_setup_mac(priv);
4150         if (err)
4151                 goto  out_remove_sysfs;
4152
4153         err = iwl_dbgfs_register(priv, DRV_NAME);
4154         if (err)
4155                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4156
4157         /* Start monitoring the killswitch */
4158         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4159                            2 * HZ);
4160
4161         return 0;
4162
4163  out_remove_sysfs:
4164         destroy_workqueue(priv->workqueue);
4165         priv->workqueue = NULL;
4166         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4167  out_release_irq:
4168         free_irq(priv->pci_dev->irq, priv);
4169  out_disable_msi:
4170         pci_disable_msi(priv->pci_dev);
4171         iwlcore_free_geos(priv);
4172         iwl_free_channel_map(priv);
4173  out_unset_hw_params:
4174         iwl3945_unset_hw_params(priv);
4175  out_eeprom_free:
4176         iwl_eeprom_free(priv);
4177  out_iounmap:
4178         pci_iounmap(pdev, priv->hw_base);
4179  out_pci_release_regions:
4180         pci_release_regions(pdev);
4181  out_pci_disable_device:
4182         pci_set_drvdata(pdev, NULL);
4183         pci_disable_device(pdev);
4184  out_ieee80211_free_hw:
4185         iwl_free_traffic_mem(priv);
4186         ieee80211_free_hw(priv->hw);
4187  out:
4188         return err;
4189 }
4190
4191 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4192 {
4193         struct iwl_priv *priv = pci_get_drvdata(pdev);
4194         unsigned long flags;
4195
4196         if (!priv)
4197                 return;
4198
4199         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4200
4201         iwl_dbgfs_unregister(priv);
4202
4203         set_bit(STATUS_EXIT_PENDING, &priv->status);
4204
4205         if (priv->mac80211_registered) {
4206                 ieee80211_unregister_hw(priv->hw);
4207                 priv->mac80211_registered = 0;
4208         } else {
4209                 iwl3945_down(priv);
4210         }
4211
4212         /*
4213          * Make sure device is reset to low power before unloading driver.
4214          * This may be redundant with iwl_down(), but there are paths to
4215          * run iwl_down() without calling apm_ops.stop(), and there are
4216          * paths to avoid running iwl_down() at all before leaving driver.
4217          * This (inexpensive) call *makes sure* device is reset.
4218          */
4219         priv->cfg->ops->lib->apm_ops.stop(priv);
4220
4221         /* make sure we flush any pending irq or
4222          * tasklet for the driver
4223          */
4224         spin_lock_irqsave(&priv->lock, flags);
4225         iwl_disable_interrupts(priv);
4226         spin_unlock_irqrestore(&priv->lock, flags);
4227
4228         iwl_synchronize_irq(priv);
4229
4230         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4231
4232         cancel_delayed_work_sync(&priv->rfkill_poll);
4233
4234         iwl3945_dealloc_ucode_pci(priv);
4235
4236         if (priv->rxq.bd)
4237                 iwl3945_rx_queue_free(priv, &priv->rxq);
4238         iwl3945_hw_txq_ctx_free(priv);
4239
4240         iwl3945_unset_hw_params(priv);
4241         iwl_clear_stations_table(priv);
4242
4243         /*netif_stop_queue(dev); */
4244         flush_workqueue(priv->workqueue);
4245
4246         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4247          * priv->workqueue... so we can't take down the workqueue
4248          * until now... */
4249         destroy_workqueue(priv->workqueue);
4250         priv->workqueue = NULL;
4251         iwl_free_traffic_mem(priv);
4252
4253         free_irq(pdev->irq, priv);
4254         pci_disable_msi(pdev);
4255
4256         pci_iounmap(pdev, priv->hw_base);
4257         pci_release_regions(pdev);
4258         pci_disable_device(pdev);
4259         pci_set_drvdata(pdev, NULL);
4260
4261         iwl_free_channel_map(priv);
4262         iwlcore_free_geos(priv);
4263         kfree(priv->scan);
4264         if (priv->ibss_beacon)
4265                 dev_kfree_skb(priv->ibss_beacon);
4266
4267         ieee80211_free_hw(priv->hw);
4268 }
4269
4270
4271 /*****************************************************************************
4272  *
4273  * driver and module entry point
4274  *
4275  *****************************************************************************/
4276
4277 static struct pci_driver iwl3945_driver = {
4278         .name = DRV_NAME,
4279         .id_table = iwl3945_hw_card_ids,
4280         .probe = iwl3945_pci_probe,
4281         .remove = __devexit_p(iwl3945_pci_remove),
4282 #ifdef CONFIG_PM
4283         .suspend = iwl_pci_suspend,
4284         .resume = iwl_pci_resume,
4285 #endif
4286 };
4287
4288 static int __init iwl3945_init(void)
4289 {
4290
4291         int ret;
4292         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4293         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4294
4295         ret = iwl3945_rate_control_register();
4296         if (ret) {
4297                 printk(KERN_ERR DRV_NAME
4298                        "Unable to register rate control algorithm: %d\n", ret);
4299                 return ret;
4300         }
4301
4302         ret = pci_register_driver(&iwl3945_driver);
4303         if (ret) {
4304                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4305                 goto error_register;
4306         }
4307
4308         return ret;
4309
4310 error_register:
4311         iwl3945_rate_control_unregister();
4312         return ret;
4313 }
4314
4315 static void __exit iwl3945_exit(void)
4316 {
4317         pci_unregister_driver(&iwl3945_driver);
4318         iwl3945_rate_control_unregister();
4319 }
4320
4321 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4322
4323 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4324 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4325 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4326 MODULE_PARM_DESC(swcrypto,
4327                  "using software crypto (default 1 [software])\n");
4328 #ifdef CONFIG_IWLWIFI_DEBUG
4329 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4330 MODULE_PARM_DESC(debug, "debug output mask");
4331 #endif
4332 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4333                    int, S_IRUGO);
4334 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4335 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4336 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4337
4338 module_exit(iwl3945_exit);
4339 module_init(iwl3945_init);