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 DRV_VERSION  IWLWIFI_VERSION VD VS
  80 #define DRV_COPYRIGHT   "Copyright(c) 2003-2009 Intel Corporation"
  81 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  82
  83 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  84 MODULE_VERSION(DRV_VERSION);
  85 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  86 MODULE_LICENSE("GPL");
  87
  88  /* module parameters */
  89 struct iwl_mod_params iwl3945_mod_params = {
  90         .sw_crypto = 1,
  91         .restart_fw = 1,
  92         /* the rest are 0 by default */
  93 };
  94
  95 /**
  96  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
  97  * @priv: eeprom and antenna fields are used to determine antenna flags
  98  *
  99  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 100  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 101  *
 102  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 103  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 104  * IWL_ANTENNA_AUX       - Force AUX antenna
 105  */
 106 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 107 {
 108         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 109
 110         switch (iwl3945_mod_params.antenna) {
 111         case IWL_ANTENNA_DIVERSITY:
 112                 return 0;
 113
 114         case IWL_ANTENNA_MAIN:
 115                 if (eeprom->antenna_switch_type)
 116                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 117                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 118
 119         case IWL_ANTENNA_AUX:
 120                 if (eeprom->antenna_switch_type)
 121                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 122                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 123         }
 124
 125         /* bad antenna selector value */
 126         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 127                 iwl3945_mod_params.antenna);
 128
 129         return 0;               /* "diversity" is default if error */
 130 }
 131
 132 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 133                                    struct ieee80211_key_conf *keyconf,
 134                                    u8 sta_id)
 135 {
 136         unsigned long flags;
 137         __le16 key_flags = 0;
 138         int ret;
 139
 140         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 141         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 142
 143         if (sta_id == priv->hw_params.bcast_sta_id)
 144                 key_flags |= STA_KEY_MULTICAST_MSK;
 145
 146         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 147         keyconf->hw_key_idx = keyconf->keyidx;
 148         key_flags &= ~STA_KEY_FLG_INVALID;
 149
 150         spin_lock_irqsave(&priv->sta_lock, flags);
 151         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
 152         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 153         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 154                keyconf->keylen);
 155
 156         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 157                keyconf->keylen);
 158
 159         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 160                         == STA_KEY_FLG_NO_ENC)
 161                 priv->stations[sta_id].sta.key.key_offset =
 162                                  iwl_get_free_ucode_key_index(priv);
 163         /* else, we are overriding an existing key => no need to allocated room
 164         * in uCode. */
 165
 166         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 167                 "no space for a new key");
 168
 169         priv->stations[sta_id].sta.key.key_flags = key_flags;
 170         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 171         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 172
 173         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 174
 175         ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
 176
 177         spin_unlock_irqrestore(&priv->sta_lock, flags);
 178
 179         return ret;
 180 }
 181
 182 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 183                                   struct ieee80211_key_conf *keyconf,
 184                                   u8 sta_id)
 185 {
 186         return -EOPNOTSUPP;
 187 }
 188
 189 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 190                                   struct ieee80211_key_conf *keyconf,
 191                                   u8 sta_id)
 192 {
 193         return -EOPNOTSUPP;
 194 }
 195
 196 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 197 {
 198         unsigned long flags;
 199
 200         spin_lock_irqsave(&priv->sta_lock, flags);
 201         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 202         memset(&priv->stations[sta_id].sta.key, 0,
 203                 sizeof(struct iwl4965_keyinfo));
 204         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 205         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 206         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 207         spin_unlock_irqrestore(&priv->sta_lock, flags);
 208
 209         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 210         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, 0);
 211         return 0;
 212 }
 213
 214 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 215                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 216 {
 217         int ret = 0;
 218
 219         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 220
 221         switch (keyconf->alg) {
 222         case ALG_CCMP:
 223                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 224                 break;
 225         case ALG_TKIP:
 226                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 227                 break;
 228         case ALG_WEP:
 229                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         default:
 232                 IWL_ERR(priv, "Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
 233                 ret = -EINVAL;
 234         }
 235
 236         IWL_DEBUG_WEP(priv, "Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
 237                       keyconf->alg, keyconf->keylen, keyconf->keyidx,
 238                       sta_id, ret);
 239
 240         return ret;
 241 }
 242
 243 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 244 {
 245         int ret = -EOPNOTSUPP;
 246
 247         return ret;
 248 }
 249
 250 static int iwl3945_set_static_key(struct iwl_priv *priv,
 251                                 struct ieee80211_key_conf *key)
 252 {
 253         if (key->alg == ALG_WEP)
 254                 return -EOPNOTSUPP;
 255
 256         IWL_ERR(priv, "Static key invalid: alg %d\n", key->alg);
 257         return -EINVAL;
 258 }
 259
 260 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 261 {
 262         struct list_head *element;
 263
 264         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 265                        priv->frames_count);
 266
 267         while (!list_empty(&priv->free_frames)) {
 268                 element = priv->free_frames.next;
 269                 list_del(element);
 270                 kfree(list_entry(element, struct iwl3945_frame, list));
 271                 priv->frames_count--;
 272         }
 273
 274         if (priv->frames_count) {
 275                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 276                             priv->frames_count);
 277                 priv->frames_count = 0;
 278         }
 279 }
 280
 281 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 282 {
 283         struct iwl3945_frame *frame;
 284         struct list_head *element;
 285         if (list_empty(&priv->free_frames)) {
 286                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 287                 if (!frame) {
 288                         IWL_ERR(priv, "Could not allocate frame!\n");
 289                         return NULL;
 290                 }
 291
 292                 priv->frames_count++;
 293                 return frame;
 294         }
 295
 296         element = priv->free_frames.next;
 297         list_del(element);
 298         return list_entry(element, struct iwl3945_frame, list);
 299 }
 300
 301 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 302 {
 303         memset(frame, 0, sizeof(*frame));
 304         list_add(&frame->list, &priv->free_frames);
 305 }
 306
 307 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 308                                 struct ieee80211_hdr *hdr,
 309                                 int left)
 310 {
 311
 312         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 313             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 314              (priv->iw_mode != NL80211_IFTYPE_AP)))
 315                 return 0;
 316
 317         if (priv->ibss_beacon->len > left)
 318                 return 0;
 319
 320         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 321
 322         return priv->ibss_beacon->len;
 323 }
 324
 325 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 326 {
 327         struct iwl3945_frame *frame;
 328         unsigned int frame_size;
 329         int rc;
 330         u8 rate;
 331
 332         frame = iwl3945_get_free_frame(priv);
 333
 334         if (!frame) {
 335                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 336                           "command.\n");
 337                 return -ENOMEM;
 338         }
 339
 340         rate = iwl_rate_get_lowest_plcp(priv);
 341
 342         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 343
 344         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 345                               &frame->u.cmd[0]);
 346
 347         iwl3945_free_frame(priv, frame);
 348
 349         return rc;
 350 }
 351
 352 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 353 {
 354         if (priv->shared_virt)
 355                 pci_free_consistent(priv->pci_dev,
 356                                     sizeof(struct iwl3945_shared),
 357                                     priv->shared_virt,
 358                                     priv->shared_phys);
 359 }
 360
 361 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 362                                       struct ieee80211_tx_info *info,
 363                                       struct iwl_device_cmd *cmd,
 364                                       struct sk_buff *skb_frag,
 365                                       int sta_id)
 366 {
 367         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 368         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 369
 370         switch (keyinfo->alg) {
 371         case ALG_CCMP:
 372                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 373                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 374                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 375                 break;
 376
 377         case ALG_TKIP:
 378                 break;
 379
 380         case ALG_WEP:
 381                 tx_cmd->sec_ctl = TX_CMD_SEC_WEP |
 382                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 383
 384                 if (keyinfo->keylen == 13)
 385                         tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 386
 387                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 388
 389                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 390                              "with key %d\n", info->control.hw_key->hw_key_idx);
 391                 break;
 392
 393         default:
 394                 IWL_ERR(priv, "Unknown encode alg %d\n", keyinfo->alg);
 395                 break;
 396         }
 397 }
 398
 399 /*
 400  * handle build REPLY_TX command notification.
 401  */
 402 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 403                                   struct iwl_device_cmd *cmd,
 404                                   struct ieee80211_tx_info *info,
 405                                   struct ieee80211_hdr *hdr, u8 std_id)
 406 {
 407         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 408         __le32 tx_flags = tx_cmd->tx_flags;
 409         __le16 fc = hdr->frame_control;
 410
 411         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 412         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 413                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 414                 if (ieee80211_is_mgmt(fc))
 415                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 416                 if (ieee80211_is_probe_resp(fc) &&
 417                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 418                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 419         } else {
 420                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 421                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 422         }
 423
 424         tx_cmd->sta_id = std_id;
 425         if (ieee80211_has_morefrags(fc))
 426                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 427
 428         if (ieee80211_is_data_qos(fc)) {
 429                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 430                 tx_cmd->tid_tspec = qc[0] & 0xf;
 431                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 432         } else {
 433                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 434         }
 435
 436         priv->cfg->ops->utils->rts_tx_cmd_flag(info, &tx_flags);
 437
 438         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
 439                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
 440
 441         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 442         if (ieee80211_is_mgmt(fc)) {
 443                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 444                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 445                 else
 446                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 447         } else {
 448                 tx_cmd->timeout.pm_frame_timeout = 0;
 449         }
 450
 451         tx_cmd->driver_txop = 0;
 452         tx_cmd->tx_flags = tx_flags;
 453         tx_cmd->next_frame_len = 0;
 454 }
 455
 456 /*
 457  * start REPLY_TX command process
 458  */
 459 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 460 {
 461         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 462         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 463         struct iwl3945_tx_cmd *tx_cmd;
 464         struct iwl_tx_queue *txq = NULL;
 465         struct iwl_queue *q = NULL;
 466         struct iwl_device_cmd *out_cmd;
 467         struct iwl_cmd_meta *out_meta;
 468         dma_addr_t phys_addr;
 469         dma_addr_t txcmd_phys;
 470         int txq_id = skb_get_queue_mapping(skb);
 471         u16 len, idx, len_org, hdr_len; /* TODO: len_org is not used */
 472         u8 id;
 473         u8 unicast;
 474         u8 sta_id;
 475         u8 tid = 0;
 476         u16 seq_number = 0;
 477         __le16 fc;
 478         u8 wait_write_ptr = 0;
 479         u8 *qc = NULL;
 480         unsigned long flags;
 481         int rc;
 482
 483         spin_lock_irqsave(&priv->lock, flags);
 484         if (iwl_is_rfkill(priv)) {
 485                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 486                 goto drop_unlock;
 487         }
 488
 489         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 490                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 491                 goto drop_unlock;
 492         }
 493
 494         unicast = !is_multicast_ether_addr(hdr->addr1);
 495         id = 0;
 496
 497         fc = hdr->frame_control;
 498
 499 #ifdef CONFIG_IWLWIFI_DEBUG
 500         if (ieee80211_is_auth(fc))
 501                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 502         else if (ieee80211_is_assoc_req(fc))
 503                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 504         else if (ieee80211_is_reassoc_req(fc))
 505                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 506 #endif
 507
 508         /* drop all non-injected data frame if we are not associated */
 509         if (ieee80211_is_data(fc) &&
 510             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
 511             (!iwl_is_associated(priv) ||
 512              ((priv->iw_mode == NL80211_IFTYPE_STATION) && !priv->assoc_id))) {
 513                 IWL_DEBUG_DROP(priv, "Dropping - !iwl_is_associated\n");
 514                 goto drop_unlock;
 515         }
 516
 517         spin_unlock_irqrestore(&priv->lock, flags);
 518
 519         hdr_len = ieee80211_hdrlen(fc);
 520
 521         /* Find (or create) index into station table for destination station */
 522         if (info->flags & IEEE80211_TX_CTL_INJECTED)
 523                 sta_id = priv->hw_params.bcast_sta_id;
 524         else
 525                 sta_id = iwl_get_sta_id(priv, hdr);
 526         if (sta_id == IWL_INVALID_STATION) {
 527                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 528                                hdr->addr1);
 529                 goto drop;
 530         }
 531
 532         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 533
 534         if (ieee80211_is_data_qos(fc)) {
 535                 qc = ieee80211_get_qos_ctl(hdr);
 536                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 537                 if (unlikely(tid >= MAX_TID_COUNT))
 538                         goto drop;
 539                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
 540                                 IEEE80211_SCTL_SEQ;
 541                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
 542                         (hdr->seq_ctrl &
 543                                 cpu_to_le16(IEEE80211_SCTL_FRAG));
 544                 seq_number += 0x10;
 545         }
 546
 547         /* Descriptor for chosen Tx queue */
 548         txq = &priv->txq[txq_id];
 549         q = &txq->q;
 550
 551         spin_lock_irqsave(&priv->lock, flags);
 552
 553         idx = get_cmd_index(q, q->write_ptr, 0);
 554
 555         /* Set up driver data for this TFD */
 556         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 557         txq->txb[q->write_ptr].skb[0] = skb;
 558
 559         /* Init first empty entry in queue's array of Tx/cmd buffers */
 560         out_cmd = txq->cmd[idx];
 561         out_meta = &txq->meta[idx];
 562         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 563         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 564         memset(tx_cmd, 0, sizeof(*tx_cmd));
 565
 566         /*
 567          * Set up the Tx-command (not MAC!) header.
 568          * Store the chosen Tx queue and TFD index within the sequence field;
 569          * after Tx, uCode's Tx response will return this value so driver can
 570          * locate the frame within the tx queue and do post-tx processing.
 571          */
 572         out_cmd->hdr.cmd = REPLY_TX;
 573         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 574                                 INDEX_TO_SEQ(q->write_ptr)));
 575
 576         /* Copy MAC header from skb into command buffer */
 577         memcpy(tx_cmd->hdr, hdr, hdr_len);
 578
 579
 580         if (info->control.hw_key)
 581                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 582
 583         /* TODO need this for burst mode later on */
 584         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 585
 586         /* set is_hcca to 0; it probably will never be implemented */
 587         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 588
 589         /* Total # bytes to be transmitted */
 590         len = (u16)skb->len;
 591         tx_cmd->len = cpu_to_le16(len);
 592
 593         iwl_dbg_log_tx_data_frame(priv, len, hdr);
 594         iwl_update_stats(priv, true, fc, len);
 595         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 596         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 597
 598         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 599                 txq->need_update = 1;
 600                 if (qc)
 601                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
 602         } else {
 603                 wait_write_ptr = 1;
 604                 txq->need_update = 0;
 605         }
 606
 607         IWL_DEBUG_TX(priv, "sequence nr = 0X%x \n",
 608                      le16_to_cpu(out_cmd->hdr.sequence));
 609         IWL_DEBUG_TX(priv, "tx_flags = 0X%x \n", le32_to_cpu(tx_cmd->tx_flags));
 610         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 611         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 612                            ieee80211_hdrlen(fc));
 613
 614         /*
 615          * Use the first empty entry in this queue's command buffer array
 616          * to contain the Tx command and MAC header concatenated together
 617          * (payload data will be in another buffer).
 618          * Size of this varies, due to varying MAC header length.
 619          * If end is not dword aligned, we'll have 2 extra bytes at the end
 620          * of the MAC header (device reads on dword boundaries).
 621          * We'll tell device about this padding later.
 622          */
 623         len = sizeof(struct iwl3945_tx_cmd) +
 624                         sizeof(struct iwl_cmd_header) + hdr_len;
 625
 626         len_org = len;
 627         len = (len + 3) & ~3;
 628
 629         if (len_org != len)
 630                 len_org = 1;
 631         else
 632                 len_org = 0;
 633
 634         /* Physical address of this Tx command's header (not MAC header!),
 635          * within command buffer array. */
 636         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 637                                     len, PCI_DMA_TODEVICE);
 638         /* we do not map meta data ... so we can safely access address to
 639          * provide to unmap command*/
 640         pci_unmap_addr_set(out_meta, mapping, txcmd_phys);
 641         pci_unmap_len_set(out_meta, len, len);
 642
 643         /* Add buffer containing Tx command and MAC(!) header to TFD's
 644          * first entry */
 645         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 646                                                    txcmd_phys, len, 1, 0);
 647
 648
 649         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 650          * if any (802.11 null frames have no payload). */
 651         len = skb->len - hdr_len;
 652         if (len) {
 653                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 654                                            len, PCI_DMA_TODEVICE);
 655                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 656                                                            phys_addr, len,
 657                                                            0, U32_PAD(len));
 658         }
 659
 660
 661         /* Tell device the write index *just past* this latest filled TFD */
 662         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 663         rc = iwl_txq_update_write_ptr(priv, txq);
 664         spin_unlock_irqrestore(&priv->lock, flags);
 665
 666         if (rc)
 667                 return rc;
 668
 669         if ((iwl_queue_space(q) < q->high_mark)
 670             && priv->mac80211_registered) {
 671                 if (wait_write_ptr) {
 672                         spin_lock_irqsave(&priv->lock, flags);
 673                         txq->need_update = 1;
 674                         iwl_txq_update_write_ptr(priv, txq);
 675                         spin_unlock_irqrestore(&priv->lock, flags);
 676                 }
 677
 678                 iwl_stop_queue(priv, skb_get_queue_mapping(skb));
 679         }
 680
 681         return 0;
 682
 683 drop_unlock:
 684         spin_unlock_irqrestore(&priv->lock, flags);
 685 drop:
 686         return -1;
 687 }
 688
 689 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
 690
 691 #include "iwl-spectrum.h"
 692
 693 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 694 #define BEACON_TIME_MASK_HIGH   0xFF000000
 695 #define TIME_UNIT               1024
 696
 697 /*
 698  * extended beacon time format
 699  * time in usec will be changed into a 32-bit value in 8:24 format
 700  * the high 1 byte is the beacon counts
 701  * the lower 3 bytes is the time in usec within one beacon interval
 702  */
 703
 704 static u32 iwl3945_usecs_to_beacons(u32 usec, u32 beacon_interval)
 705 {
 706         u32 quot;
 707         u32 rem;
 708         u32 interval = beacon_interval * 1024;
 709
 710         if (!interval || !usec)
 711                 return 0;
 712
 713         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 714         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 715
 716         return (quot << 24) + rem;
 717 }
 718
 719 /* base is usually what we get from ucode with each received frame,
 720  * the same as HW timer counter counting down
 721  */
 722
 723 static __le32 iwl3945_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 724 {
 725         u32 base_low = base & BEACON_TIME_MASK_LOW;
 726         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 727         u32 interval = beacon_interval * TIME_UNIT;
 728         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 729             (addon & BEACON_TIME_MASK_HIGH);
 730
 731         if (base_low > addon_low)
 732                 res += base_low - addon_low;
 733         else if (base_low < addon_low) {
 734                 res += interval + base_low - addon_low;
 735                 res += (1 << 24);
 736         } else
 737                 res += (1 << 24);
 738
 739         return cpu_to_le32(res);
 740 }
 741
 742 static int iwl3945_get_measurement(struct iwl_priv *priv,
 743                                struct ieee80211_measurement_params *params,
 744                                u8 type)
 745 {
 746         struct iwl_spectrum_cmd spectrum;
 747         struct iwl_rx_packet *pkt;
 748         struct iwl_host_cmd cmd = {
 749                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 750                 .data = (void *)&spectrum,
 751                 .flags = CMD_WANT_SKB,
 752         };
 753         u32 add_time = le64_to_cpu(params->start_time);
 754         int rc;
 755         int spectrum_resp_status;
 756         int duration = le16_to_cpu(params->duration);
 757
 758         if (iwl_is_associated(priv))
 759                 add_time =
 760                     iwl3945_usecs_to_beacons(
 761                         le64_to_cpu(params->start_time) - priv->last_tsf,
 762                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 763
 764         memset(&spectrum, 0, sizeof(spectrum));
 765
 766         spectrum.channel_count = cpu_to_le16(1);
 767         spectrum.flags =
 768             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 769         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 770         cmd.len = sizeof(spectrum);
 771         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 772
 773         if (iwl_is_associated(priv))
 774                 spectrum.start_time =
 775                     iwl3945_add_beacon_time(priv->last_beacon_time,
 776                                 add_time,
 777                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 778         else
 779                 spectrum.start_time = 0;
 780
 781         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 782         spectrum.channels[0].channel = params->channel;
 783         spectrum.channels[0].type = type;
 784         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 785                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 786                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 787
 788         rc = iwl_send_cmd_sync(priv, &cmd);
 789         if (rc)
 790                 return rc;
 791
 792         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 793         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 794                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 795                 rc = -EIO;
 796         }
 797
 798         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 799         switch (spectrum_resp_status) {
 800         case 0:         /* Command will be handled */
 801                 if (pkt->u.spectrum.id != 0xff) {
 802                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 803                                                 pkt->u.spectrum.id);
 804                         priv->measurement_status &= ~MEASUREMENT_READY;
 805                 }
 806                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 807                 rc = 0;
 808                 break;
 809
 810         case 1:         /* Command will not be handled */
 811                 rc = -EAGAIN;
 812                 break;
 813         }
 814
 815         free_pages(cmd.reply_page, priv->hw_params.rx_page_order);
 816
 817         return rc;
 818 }
 819 #endif
 820
 821 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 822                                struct iwl_rx_mem_buffer *rxb)
 823 {
 824         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 825         struct iwl_alive_resp *palive;
 826         struct delayed_work *pwork;
 827
 828         palive = &pkt->u.alive_frame;
 829
 830         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 831                        "0x%01X 0x%01X\n",
 832                        palive->is_valid, palive->ver_type,
 833                        palive->ver_subtype);
 834
 835         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 836                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 837                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 838                        sizeof(struct iwl_alive_resp));
 839                 pwork = &priv->init_alive_start;
 840         } else {
 841                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 842                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 843                        sizeof(struct iwl_alive_resp));
 844                 pwork = &priv->alive_start;
 845                 iwl3945_disable_events(priv);
 846         }
 847
 848         /* We delay the ALIVE response by 5ms to
 849          * give the HW RF Kill time to activate... */
 850         if (palive->is_valid == UCODE_VALID_OK)
 851                 queue_delayed_work(priv->workqueue, pwork,
 852                                    msecs_to_jiffies(5));
 853         else
 854                 IWL_WARN(priv, "uCode did not respond OK.\n");
 855 }
 856
 857 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 858                                  struct iwl_rx_mem_buffer *rxb)
 859 {
 860 #ifdef CONFIG_IWLWIFI_DEBUG
 861         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 862 #endif
 863
 864         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 865         return;
 866 }
 867
 868 static void iwl3945_bg_beacon_update(struct work_struct *work)
 869 {
 870         struct iwl_priv *priv =
 871                 container_of(work, struct iwl_priv, beacon_update);
 872         struct sk_buff *beacon;
 873
 874         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 875         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 876
 877         if (!beacon) {
 878                 IWL_ERR(priv, "update beacon failed\n");
 879                 return;
 880         }
 881
 882         mutex_lock(&priv->mutex);
 883         /* new beacon skb is allocated every time; dispose previous.*/
 884         if (priv->ibss_beacon)
 885                 dev_kfree_skb(priv->ibss_beacon);
 886
 887         priv->ibss_beacon = beacon;
 888         mutex_unlock(&priv->mutex);
 889
 890         iwl3945_send_beacon_cmd(priv);
 891 }
 892
 893 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 894                                 struct iwl_rx_mem_buffer *rxb)
 895 {
 896 #ifdef CONFIG_IWLWIFI_DEBUG
 897         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 898         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 899         u8 rate = beacon->beacon_notify_hdr.rate;
 900
 901         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 902                 "tsf %d %d rate %d\n",
 903                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 904                 beacon->beacon_notify_hdr.failure_frame,
 905                 le32_to_cpu(beacon->ibss_mgr_status),
 906                 le32_to_cpu(beacon->high_tsf),
 907                 le32_to_cpu(beacon->low_tsf), rate);
 908 #endif
 909
 910         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 911             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 912                 queue_work(priv->workqueue, &priv->beacon_update);
 913 }
 914
 915 /* Handle notification from uCode that card's power state is changing
 916  * due to software, hardware, or critical temperature RFKILL */
 917 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 918                                     struct iwl_rx_mem_buffer *rxb)
 919 {
 920         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 921         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 922         unsigned long status = priv->status;
 923
 924         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 925                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 926                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 927
 928         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 929                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 930
 931         if (flags & HW_CARD_DISABLED)
 932                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 933         else
 934                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 935
 936
 937         iwl_scan_cancel(priv);
 938
 939         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 940              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 941                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 942                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 943         else
 944                 wake_up_interruptible(&priv->wait_command_queue);
 945 }
 946
 947 /**
 948  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 949  *
 950  * Setup the RX handlers for each of the reply types sent from the uCode
 951  * to the host.
 952  *
 953  * This function chains into the hardware specific files for them to setup
 954  * any hardware specific handlers as well.
 955  */
 956 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 957 {
 958         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 959         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 960         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 961         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 962         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 963         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 964             iwl_rx_pm_debug_statistics_notif;
 965         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 966
 967         /*
 968          * The same handler is used for both the REPLY to a discrete
 969          * statistics request from the host as well as for the periodic
 970          * statistics notifications (after received beacons) from the uCode.
 971          */
 972         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
 973         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 974
 975         iwl_setup_spectrum_handlers(priv);
 976         iwl_setup_rx_scan_handlers(priv);
 977         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 978
 979         /* Set up hardware specific Rx handlers */
 980         iwl3945_hw_rx_handler_setup(priv);
 981 }
 982
 983 /************************** RX-FUNCTIONS ****************************/
 984 /*
 985  * Rx theory of operation
 986  *
 987  * The host allocates 32 DMA target addresses and passes the host address
 988  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 989  * 0 to 31
 990  *
 991  * Rx Queue Indexes
 992  * The host/firmware share two index registers for managing the Rx buffers.
 993  *
 994  * The READ index maps to the first position that the firmware may be writing
 995  * to -- the driver can read up to (but not including) this position and get
 996  * good data.
 997  * The READ index is managed by the firmware once the card is enabled.
 998  *
 999  * The WRITE index maps to the last position the driver has read from -- the
1000  * position preceding WRITE is the last slot the firmware can place a packet.
1001  *
1002  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
1003  * WRITE = READ.
1004  *
1005  * During initialization, the host sets up the READ queue position to the first
1006  * INDEX position, and WRITE to the last (READ - 1 wrapped)
1007  *
1008  * When the firmware places a packet in a buffer, it will advance the READ index
1009  * and fire the RX interrupt.  The driver can then query the READ index and
1010  * process as many packets as possible, moving the WRITE index forward as it
1011  * resets the Rx queue buffers with new memory.
1012  *
1013  * The management in the driver is as follows:
1014  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
1015  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
1016  *   to replenish the iwl->rxq->rx_free.
1017  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
1018  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
1019  *   'processed' and 'read' driver indexes as well)
1020  * + A received packet is processed and handed to the kernel network stack,
1021  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
1022  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
1023  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
1024  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
1025  *   were enough free buffers and RX_STALLED is set it is cleared.
1026  *
1027  *
1028  * Driver sequence:
1029  *
1030  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
1031  *                            iwl3945_rx_queue_restock
1032  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
1033  *                            queue, updates firmware pointers, and updates
1034  *                            the WRITE index.  If insufficient rx_free buffers
1035  *                            are available, schedules iwl3945_rx_replenish
1036  *
1037  * -- enable interrupts --
1038  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
1039  *                            READ INDEX, detaching the SKB from the pool.
1040  *                            Moves the packet buffer from queue to rx_used.
1041  *                            Calls iwl3945_rx_queue_restock to refill any empty
1042  *                            slots.
1043  * ...
1044  *
1045  */
1046
1047 /**
1048  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
1049  */
1050 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
1051                                           dma_addr_t dma_addr)
1052 {
1053         return cpu_to_le32((u32)dma_addr);
1054 }
1055
1056 /**
1057  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
1058  *
1059  * If there are slots in the RX queue that need to be restocked,
1060  * and we have free pre-allocated buffers, fill the ranks as much
1061  * as we can, pulling from rx_free.
1062  *
1063  * This moves the 'write' index forward to catch up with 'processed', and
1064  * also updates the memory address in the firmware to reference the new
1065  * target buffer.
1066  */
1067 static int iwl3945_rx_queue_restock(struct iwl_priv *priv)
1068 {
1069         struct iwl_rx_queue *rxq = &priv->rxq;
1070         struct list_head *element;
1071         struct iwl_rx_mem_buffer *rxb;
1072         unsigned long flags;
1073         int write, rc;
1074
1075         spin_lock_irqsave(&rxq->lock, flags);
1076         write = rxq->write & ~0x7;
1077         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
1078                 /* Get next free Rx buffer, remove from free list */
1079                 element = rxq->rx_free.next;
1080                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1081                 list_del(element);
1082
1083                 /* Point to Rx buffer via next RBD in circular buffer */
1084                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
1085                 rxq->queue[rxq->write] = rxb;
1086                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
1087                 rxq->free_count--;
1088         }
1089         spin_unlock_irqrestore(&rxq->lock, flags);
1090         /* If the pre-allocated buffer pool is dropping low, schedule to
1091          * refill it */
1092         if (rxq->free_count <= RX_LOW_WATERMARK)
1093                 queue_work(priv->workqueue, &priv->rx_replenish);
1094
1095
1096         /* If we've added more space for the firmware to place data, tell it.
1097          * Increment device's write pointer in multiples of 8. */
1098         if ((rxq->write_actual != (rxq->write & ~0x7))
1099             || (abs(rxq->write - rxq->read) > 7)) {
1100                 spin_lock_irqsave(&rxq->lock, flags);
1101                 rxq->need_update = 1;
1102                 spin_unlock_irqrestore(&rxq->lock, flags);
1103                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
1104                 if (rc)
1105                         return rc;
1106         }
1107
1108         return 0;
1109 }
1110
1111 /**
1112  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1113  *
1114  * When moving to rx_free an SKB is allocated for the slot.
1115  *
1116  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1117  * This is called as a scheduled work item (except for during initialization)
1118  */
1119 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1120 {
1121         struct iwl_rx_queue *rxq = &priv->rxq;
1122         struct list_head *element;
1123         struct iwl_rx_mem_buffer *rxb;
1124         struct page *page;
1125         unsigned long flags;
1126         gfp_t gfp_mask = priority;
1127
1128         while (1) {
1129                 spin_lock_irqsave(&rxq->lock, flags);
1130
1131                 if (list_empty(&rxq->rx_used)) {
1132                         spin_unlock_irqrestore(&rxq->lock, flags);
1133                         return;
1134                 }
1135                 spin_unlock_irqrestore(&rxq->lock, flags);
1136
1137                 if (rxq->free_count > RX_LOW_WATERMARK)
1138                         gfp_mask |= __GFP_NOWARN;
1139
1140                 if (priv->hw_params.rx_page_order > 0)
1141                         gfp_mask |= __GFP_COMP;
1142
1143                 /* Alloc a new receive buffer */
1144                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1145                 if (!page) {
1146                         if (net_ratelimit())
1147                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1148                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1149                             net_ratelimit())
1150                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1151                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1152                                          rxq->free_count);
1153                         /* We don't reschedule replenish work here -- we will
1154                          * call the restock method and if it still needs
1155                          * more buffers it will schedule replenish */
1156                         break;
1157                 }
1158
1159                 spin_lock_irqsave(&rxq->lock, flags);
1160                 if (list_empty(&rxq->rx_used)) {
1161                         spin_unlock_irqrestore(&rxq->lock, flags);
1162                         __free_pages(page, priv->hw_params.rx_page_order);
1163                         return;
1164                 }
1165                 element = rxq->rx_used.next;
1166                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1167                 list_del(element);
1168                 spin_unlock_irqrestore(&rxq->lock, flags);
1169
1170                 rxb->page = page;
1171                 /* Get physical address of RB/SKB */
1172                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1173                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1174                                 PCI_DMA_FROMDEVICE);
1175
1176                 spin_lock_irqsave(&rxq->lock, flags);
1177
1178                 list_add_tail(&rxb->list, &rxq->rx_free);
1179                 rxq->free_count++;
1180                 priv->alloc_rxb_page++;
1181
1182                 spin_unlock_irqrestore(&rxq->lock, flags);
1183         }
1184 }
1185
1186 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1187 {
1188         unsigned long flags;
1189         int i;
1190         spin_lock_irqsave(&rxq->lock, flags);
1191         INIT_LIST_HEAD(&rxq->rx_free);
1192         INIT_LIST_HEAD(&rxq->rx_used);
1193         /* Fill the rx_used queue with _all_ of the Rx buffers */
1194         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1195                 /* In the reset function, these buffers may have been allocated
1196                  * to an SKB, so we need to unmap and free potential storage */
1197                 if (rxq->pool[i].page != NULL) {
1198                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1199                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1200                                 PCI_DMA_FROMDEVICE);
1201                         priv->alloc_rxb_page--;
1202                         __free_pages(rxq->pool[i].page,
1203                                      priv->hw_params.rx_page_order);
1204                         rxq->pool[i].page = NULL;
1205                 }
1206                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1207         }
1208
1209         /* Set us so that we have processed and used all buffers, but have
1210          * not restocked the Rx queue with fresh buffers */
1211         rxq->read = rxq->write = 0;
1212         rxq->write_actual = 0;
1213         rxq->free_count = 0;
1214         spin_unlock_irqrestore(&rxq->lock, flags);
1215 }
1216
1217 void iwl3945_rx_replenish(void *data)
1218 {
1219         struct iwl_priv *priv = data;
1220         unsigned long flags;
1221
1222         iwl3945_rx_allocate(priv, GFP_KERNEL);
1223
1224         spin_lock_irqsave(&priv->lock, flags);
1225         iwl3945_rx_queue_restock(priv);
1226         spin_unlock_irqrestore(&priv->lock, flags);
1227 }
1228
1229 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1230 {
1231         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1232
1233         iwl3945_rx_queue_restock(priv);
1234 }
1235
1236
1237 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1238  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1239  * This free routine walks the list of POOL entries and if SKB is set to
1240  * non NULL it is unmapped and freed
1241  */
1242 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1243 {
1244         int i;
1245         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1246                 if (rxq->pool[i].page != NULL) {
1247                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1248                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1249                                 PCI_DMA_FROMDEVICE);
1250                         __free_pages(rxq->pool[i].page,
1251                                      priv->hw_params.rx_page_order);
1252                         rxq->pool[i].page = NULL;
1253                         priv->alloc_rxb_page--;
1254                 }
1255         }
1256
1257         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1258                             rxq->dma_addr);
1259         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1260                             rxq->rb_stts, rxq->rb_stts_dma);
1261         rxq->bd = NULL;
1262         rxq->rb_stts  = NULL;
1263 }
1264
1265
1266 /* Convert linear signal-to-noise ratio into dB */
1267 static u8 ratio2dB[100] = {
1268 /*       0   1   2   3   4   5   6   7   8   9 */
1269          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1270         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1271         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1272         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1273         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1274         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1275         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1276         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1277         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1278         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1279 };
1280
1281 /* Calculates a relative dB value from a ratio of linear
1282  *   (i.e. not dB) signal levels.
1283  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1284 int iwl3945_calc_db_from_ratio(int sig_ratio)
1285 {
1286         /* 1000:1 or higher just report as 60 dB */
1287         if (sig_ratio >= 1000)
1288                 return 60;
1289
1290         /* 100:1 or higher, divide by 10 and use table,
1291          *   add 20 dB to make up for divide by 10 */
1292         if (sig_ratio >= 100)
1293                 return 20 + (int)ratio2dB[sig_ratio/10];
1294
1295         /* We shouldn't see this */
1296         if (sig_ratio < 1)
1297                 return 0;
1298
1299         /* Use table for ratios 1:1 - 99:1 */
1300         return (int)ratio2dB[sig_ratio];
1301 }
1302
1303 #define PERFECT_RSSI (-20) /* dBm */
1304 #define WORST_RSSI (-95)   /* dBm */
1305 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1306
1307 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1308  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1309  *   about formulas used below. */
1310 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1311 {
1312         int sig_qual;
1313         int degradation = PERFECT_RSSI - rssi_dbm;
1314
1315         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1316          * as indicator; formula is (signal dbm - noise dbm).
1317          * SNR at or above 40 is a great signal (100%).
1318          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1319          * Weakest usable signal is usually 10 - 15 dB SNR. */
1320         if (noise_dbm) {
1321                 if (rssi_dbm - noise_dbm >= 40)
1322                         return 100;
1323                 else if (rssi_dbm < noise_dbm)
1324                         return 0;
1325                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1326
1327         /* Else use just the signal level.
1328          * This formula is a least squares fit of data points collected and
1329          *   compared with a reference system that had a percentage (%) display
1330          *   for signal quality. */
1331         } else
1332                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1333                             (15 * RSSI_RANGE + 62 * degradation)) /
1334                            (RSSI_RANGE * RSSI_RANGE);
1335
1336         if (sig_qual > 100)
1337                 sig_qual = 100;
1338         else if (sig_qual < 1)
1339                 sig_qual = 0;
1340
1341         return sig_qual;
1342 }
1343
1344 /**
1345  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1346  *
1347  * Uses the priv->rx_handlers callback function array to invoke
1348  * the appropriate handlers, including command responses,
1349  * frame-received notifications, and other notifications.
1350  */
1351 static void iwl3945_rx_handle(struct iwl_priv *priv)
1352 {
1353         struct iwl_rx_mem_buffer *rxb;
1354         struct iwl_rx_packet *pkt;
1355         struct iwl_rx_queue *rxq = &priv->rxq;
1356         u32 r, i;
1357         int reclaim;
1358         unsigned long flags;
1359         u8 fill_rx = 0;
1360         u32 count = 8;
1361         int total_empty = 0;
1362
1363         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1364          * buffer that the driver may process (last buffer filled by ucode). */
1365         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1366         i = rxq->read;
1367
1368         /* calculate total frames need to be restock after handling RX */
1369         total_empty = r - rxq->write_actual;
1370         if (total_empty < 0)
1371                 total_empty += RX_QUEUE_SIZE;
1372
1373         if (total_empty > (RX_QUEUE_SIZE / 2))
1374                 fill_rx = 1;
1375         /* Rx interrupt, but nothing sent from uCode */
1376         if (i == r)
1377                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1378
1379         while (i != r) {
1380                 rxb = rxq->queue[i];
1381
1382                 /* If an RXB doesn't have a Rx queue slot associated with it,
1383                  * then a bug has been introduced in the queue refilling
1384                  * routines -- catch it here */
1385                 BUG_ON(rxb == NULL);
1386
1387                 rxq->queue[i] = NULL;
1388
1389                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1390                                PAGE_SIZE << priv->hw_params.rx_page_order,
1391                                PCI_DMA_FROMDEVICE);
1392                 pkt = rxb_addr(rxb);
1393
1394                 trace_iwlwifi_dev_rx(priv, pkt,
1395                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1396
1397                 /* Reclaim a command buffer only if this packet is a response
1398                  *   to a (driver-originated) command.
1399                  * If the packet (e.g. Rx frame) originated from uCode,
1400                  *   there is no command buffer to reclaim.
1401                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1402                  *   but apparently a few don't get set; catch them here. */
1403                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1404                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1405                         (pkt->hdr.cmd != REPLY_TX);
1406
1407                 /* Based on type of command response or notification,
1408                  *   handle those that need handling via function in
1409                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1410                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1411                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1412                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1413                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1414                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1415                 } else {
1416                         /* No handling needed */
1417                         IWL_DEBUG_RX(priv,
1418                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1419                                 r, i, get_cmd_string(pkt->hdr.cmd),
1420                                 pkt->hdr.cmd);
1421                 }
1422
1423                 /*
1424                  * XXX: After here, we should always check rxb->page
1425                  * against NULL before touching it or its virtual
1426                  * memory (pkt). Because some rx_handler might have
1427                  * already taken or freed the pages.
1428                  */
1429
1430                 if (reclaim) {
1431                         /* Invoke any callbacks, transfer the buffer to caller,
1432                          * and fire off the (possibly) blocking iwl_send_cmd()
1433                          * as we reclaim the driver command queue */
1434                         if (rxb->page)
1435                                 iwl_tx_cmd_complete(priv, rxb);
1436                         else
1437                                 IWL_WARN(priv, "Claim null rxb?\n");
1438                 }
1439
1440                 /* Reuse the page if possible. For notification packets and
1441                  * SKBs that fail to Rx correctly, add them back into the
1442                  * rx_free list for reuse later. */
1443                 spin_lock_irqsave(&rxq->lock, flags);
1444                 if (rxb->page != NULL) {
1445                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1446                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1447                                 PCI_DMA_FROMDEVICE);
1448                         list_add_tail(&rxb->list, &rxq->rx_free);
1449                         rxq->free_count++;
1450                 } else
1451                         list_add_tail(&rxb->list, &rxq->rx_used);
1452
1453                 spin_unlock_irqrestore(&rxq->lock, flags);
1454
1455                 i = (i + 1) & RX_QUEUE_MASK;
1456                 /* If there are a lot of unused frames,
1457                  * restock the Rx queue so ucode won't assert. */
1458                 if (fill_rx) {
1459                         count++;
1460                         if (count >= 8) {
1461                                 rxq->read = i;
1462                                 iwl3945_rx_replenish_now(priv);
1463                                 count = 0;
1464                         }
1465                 }
1466         }
1467
1468         /* Backtrack one entry */
1469         rxq->read = i;
1470         if (fill_rx)
1471                 iwl3945_rx_replenish_now(priv);
1472         else
1473                 iwl3945_rx_queue_restock(priv);
1474 }
1475
1476 /* call this function to flush any scheduled tasklet */
1477 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1478 {
1479         /* wait to make sure we flush pending tasklet*/
1480         synchronize_irq(priv->pci_dev->irq);
1481         tasklet_kill(&priv->irq_tasklet);
1482 }
1483
1484 static const char *desc_lookup(int i)
1485 {
1486         switch (i) {
1487         case 1:
1488                 return "FAIL";
1489         case 2:
1490                 return "BAD_PARAM";
1491         case 3:
1492                 return "BAD_CHECKSUM";
1493         case 4:
1494                 return "NMI_INTERRUPT";
1495         case 5:
1496                 return "SYSASSERT";
1497         case 6:
1498                 return "FATAL_ERROR";
1499         }
1500
1501         return "UNKNOWN";
1502 }
1503
1504 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1505 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1506
1507 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1508 {
1509         u32 i;
1510         u32 desc, time, count, base, data1;
1511         u32 blink1, blink2, ilink1, ilink2;
1512
1513         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1514
1515         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1516                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1517                 return;
1518         }
1519
1520
1521         count = iwl_read_targ_mem(priv, base);
1522
1523         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1524                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1525                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1526                         priv->status, count);
1527         }
1528
1529         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1530                   "ilink1  nmiPC   Line\n");
1531         for (i = ERROR_START_OFFSET;
1532              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1533              i += ERROR_ELEM_SIZE) {
1534                 desc = iwl_read_targ_mem(priv, base + i);
1535                 time =
1536                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1537                 blink1 =
1538                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1539                 blink2 =
1540                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1541                 ilink1 =
1542                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1543                 ilink2 =
1544                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1545                 data1 =
1546                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1547
1548                 IWL_ERR(priv,
1549                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1550                         desc_lookup(desc), desc, time, blink1, blink2,
1551                         ilink1, ilink2, data1);
1552                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1553                                         0, blink1, blink2, ilink1, ilink2);
1554         }
1555 }
1556
1557 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1558
1559 /**
1560  * iwl3945_print_event_log - Dump error event log to syslog
1561  *
1562  */
1563 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1564                                 u32 num_events, u32 mode)
1565 {
1566         u32 i;
1567         u32 base;       /* SRAM byte address of event log header */
1568         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1569         u32 ptr;        /* SRAM byte address of log data */
1570         u32 ev, time, data; /* event log data */
1571         unsigned long reg_flags;
1572
1573         if (num_events == 0)
1574                 return;
1575
1576         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1577
1578         if (mode == 0)
1579                 event_size = 2 * sizeof(u32);
1580         else
1581                 event_size = 3 * sizeof(u32);
1582
1583         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1584
1585         /* Make sure device is powered up for SRAM reads */
1586         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1587         iwl_grab_nic_access(priv);
1588
1589         /* Set starting address; reads will auto-increment */
1590         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1591         rmb();
1592
1593         /* "time" is actually "data" for mode 0 (no timestamp).
1594          * place event id # at far right for easier visual parsing. */
1595         for (i = 0; i < num_events; i++) {
1596                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1597                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1598                 if (mode == 0) {
1599                         /* data, ev */
1600                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1601                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1602                 } else {
1603                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1604                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1605                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1606                 }
1607         }
1608
1609         /* Allow device to power down */
1610         iwl_release_nic_access(priv);
1611         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1612 }
1613
1614 /**
1615  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1616  */
1617 static void iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1618                                       u32 num_wraps, u32 next_entry,
1619                                       u32 size, u32 mode)
1620 {
1621         /*
1622          * display the newest DEFAULT_LOG_ENTRIES entries
1623          * i.e the entries just before the next ont that uCode would fill.
1624          */
1625         if (num_wraps) {
1626                 if (next_entry < size) {
1627                         iwl3945_print_event_log(priv,
1628                                         capacity - (size - next_entry),
1629                                         size - next_entry, mode);
1630                         iwl3945_print_event_log(priv, 0,
1631                                     next_entry, mode);
1632                 } else
1633                         iwl3945_print_event_log(priv, next_entry - size,
1634                                     size, mode);
1635         } else {
1636                 if (next_entry < size)
1637                         iwl3945_print_event_log(priv, 0, next_entry, mode);
1638                 else
1639                         iwl3945_print_event_log(priv, next_entry - size,
1640                                             size, mode);
1641         }
1642 }
1643
1644 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1645 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1646
1647 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1648
1649 void iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log)
1650 {
1651         u32 base;       /* SRAM byte address of event log header */
1652         u32 capacity;   /* event log capacity in # entries */
1653         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1654         u32 num_wraps;  /* # times uCode wrapped to top of log */
1655         u32 next_entry; /* index of next entry to be written by uCode */
1656         u32 size;       /* # entries that we'll print */
1657
1658         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1659         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1660                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1661                 return;
1662         }
1663
1664         /* event log header */
1665         capacity = iwl_read_targ_mem(priv, base);
1666         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1667         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1668         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1669
1670         if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1671                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1672                         capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1673                 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1674         }
1675
1676         if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1677                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1678                         next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1679                 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1680         }
1681
1682         size = num_wraps ? capacity : next_entry;
1683
1684         /* bail out if nothing in log */
1685         if (size == 0) {
1686                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1687                 return;
1688         }
1689
1690 #ifdef CONFIG_IWLWIFI_DEBUG
1691         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS))
1692                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1693                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1694 #else
1695         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1696                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1697 #endif
1698
1699         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1700                   size);
1701
1702 #ifdef CONFIG_IWLWIFI_DEBUG
1703         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1704                 /* if uCode has wrapped back to top of log,
1705                  * start at the oldest entry,
1706                  * i.e the next one that uCode would fill.
1707                  */
1708                 if (num_wraps)
1709                         iwl3945_print_event_log(priv, next_entry,
1710                                     capacity - next_entry, mode);
1711
1712                 /* (then/else) start at top of log */
1713                 iwl3945_print_event_log(priv, 0, next_entry, mode);
1714         } else
1715                 iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1716                                         next_entry, size, mode);
1717 #else
1718         iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1719                                 next_entry, size, mode);
1720 #endif
1721
1722 }
1723
1724 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1725 {
1726         u32 inta, handled = 0;
1727         u32 inta_fh;
1728         unsigned long flags;
1729 #ifdef CONFIG_IWLWIFI_DEBUG
1730         u32 inta_mask;
1731 #endif
1732
1733         spin_lock_irqsave(&priv->lock, flags);
1734
1735         /* Ack/clear/reset pending uCode interrupts.
1736          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1737          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1738         inta = iwl_read32(priv, CSR_INT);
1739         iwl_write32(priv, CSR_INT, inta);
1740
1741         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1742          * Any new interrupts that happen after this, either while we're
1743          * in this tasklet, or later, will show up in next ISR/tasklet. */
1744         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1745         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1746
1747 #ifdef CONFIG_IWLWIFI_DEBUG
1748         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1749                 /* just for debug */
1750                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1751                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1752                               inta, inta_mask, inta_fh);
1753         }
1754 #endif
1755
1756         spin_unlock_irqrestore(&priv->lock, flags);
1757
1758         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1759          * atomic, make sure that inta covers all the interrupts that
1760          * we've discovered, even if FH interrupt came in just after
1761          * reading CSR_INT. */
1762         if (inta_fh & CSR39_FH_INT_RX_MASK)
1763                 inta |= CSR_INT_BIT_FH_RX;
1764         if (inta_fh & CSR39_FH_INT_TX_MASK)
1765                 inta |= CSR_INT_BIT_FH_TX;
1766
1767         /* Now service all interrupt bits discovered above. */
1768         if (inta & CSR_INT_BIT_HW_ERR) {
1769                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1770
1771                 /* Tell the device to stop sending interrupts */
1772                 iwl_disable_interrupts(priv);
1773
1774                 priv->isr_stats.hw++;
1775                 iwl_irq_handle_error(priv);
1776
1777                 handled |= CSR_INT_BIT_HW_ERR;
1778
1779                 return;
1780         }
1781
1782 #ifdef CONFIG_IWLWIFI_DEBUG
1783         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1784                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1785                 if (inta & CSR_INT_BIT_SCD) {
1786                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1787                                       "the frame/frames.\n");
1788                         priv->isr_stats.sch++;
1789                 }
1790
1791                 /* Alive notification via Rx interrupt will do the real work */
1792                 if (inta & CSR_INT_BIT_ALIVE) {
1793                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1794                         priv->isr_stats.alive++;
1795                 }
1796         }
1797 #endif
1798         /* Safely ignore these bits for debug checks below */
1799         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1800
1801         /* Error detected by uCode */
1802         if (inta & CSR_INT_BIT_SW_ERR) {
1803                 IWL_ERR(priv, "Microcode SW error detected. "
1804                         "Restarting 0x%X.\n", inta);
1805                 priv->isr_stats.sw++;
1806                 priv->isr_stats.sw_err = inta;
1807                 iwl_irq_handle_error(priv);
1808                 handled |= CSR_INT_BIT_SW_ERR;
1809         }
1810
1811         /* uCode wakes up after power-down sleep */
1812         if (inta & CSR_INT_BIT_WAKEUP) {
1813                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1814                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1815                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1816                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1817                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1818                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1819                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1820                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1821
1822                 priv->isr_stats.wakeup++;
1823                 handled |= CSR_INT_BIT_WAKEUP;
1824         }
1825
1826         /* All uCode command responses, including Tx command responses,
1827          * Rx "responses" (frame-received notification), and other
1828          * notifications from uCode come through here*/
1829         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1830                 iwl3945_rx_handle(priv);
1831                 priv->isr_stats.rx++;
1832                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1833         }
1834
1835         if (inta & CSR_INT_BIT_FH_TX) {
1836                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1837                 priv->isr_stats.tx++;
1838
1839                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1840                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1841                                         (FH39_SRVC_CHNL), 0x0);
1842                 handled |= CSR_INT_BIT_FH_TX;
1843         }
1844
1845         if (inta & ~handled) {
1846                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1847                 priv->isr_stats.unhandled++;
1848         }
1849
1850         if (inta & ~priv->inta_mask) {
1851                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1852                          inta & ~priv->inta_mask);
1853                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1854         }
1855
1856         /* Re-enable all interrupts */
1857         /* only Re-enable if disabled by irq */
1858         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1859                 iwl_enable_interrupts(priv);
1860
1861 #ifdef CONFIG_IWLWIFI_DEBUG
1862         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1863                 inta = iwl_read32(priv, CSR_INT);
1864                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1865                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1866                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1867                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1868         }
1869 #endif
1870 }
1871
1872 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1873                                          enum ieee80211_band band,
1874                                      u8 is_active, u8 n_probes,
1875                                      struct iwl3945_scan_channel *scan_ch)
1876 {
1877         struct ieee80211_channel *chan;
1878         const struct ieee80211_supported_band *sband;
1879         const struct iwl_channel_info *ch_info;
1880         u16 passive_dwell = 0;
1881         u16 active_dwell = 0;
1882         int added, i;
1883
1884         sband = iwl_get_hw_mode(priv, band);
1885         if (!sband)
1886                 return 0;
1887
1888         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1889         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1890
1891         if (passive_dwell <= active_dwell)
1892                 passive_dwell = active_dwell + 1;
1893
1894         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1895                 chan = priv->scan_request->channels[i];
1896
1897                 if (chan->band != band)
1898                         continue;
1899
1900                 scan_ch->channel = chan->hw_value;
1901
1902                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1903                 if (!is_channel_valid(ch_info)) {
1904                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1905                                        scan_ch->channel);
1906                         continue;
1907                 }
1908
1909                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1910                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1911                 /* If passive , set up for auto-switch
1912                  *  and use long active_dwell time.
1913                  */
1914                 if (!is_active || is_channel_passive(ch_info) ||
1915                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1916                         scan_ch->type = 0;      /* passive */
1917                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1918                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1919                 } else {
1920                         scan_ch->type = 1;      /* active */
1921                 }
1922
1923                 /* Set direct probe bits. These may be used both for active
1924                  * scan channels (probes gets sent right away),
1925                  * or for passive channels (probes get se sent only after
1926                  * hearing clear Rx packet).*/
1927                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1928                         if (n_probes)
1929                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1930                 } else {
1931                         /* uCode v1 does not allow setting direct probe bits on
1932                          * passive channel. */
1933                         if ((scan_ch->type & 1) && n_probes)
1934                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1935                 }
1936
1937                 /* Set txpower levels to defaults */
1938                 scan_ch->tpc.dsp_atten = 110;
1939                 /* scan_pwr_info->tpc.dsp_atten; */
1940
1941                 /*scan_pwr_info->tpc.tx_gain; */
1942                 if (band == IEEE80211_BAND_5GHZ)
1943                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1944                 else {
1945                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1946                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1947                          * power level:
1948                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1949                          */
1950                 }
1951
1952                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1953                                scan_ch->channel,
1954                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1955                                (scan_ch->type & 1) ?
1956                                active_dwell : passive_dwell);
1957
1958                 scan_ch++;
1959                 added++;
1960         }
1961
1962         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1963         return added;
1964 }
1965
1966 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1967                               struct ieee80211_rate *rates)
1968 {
1969         int i;
1970
1971         for (i = 0; i < IWL_RATE_COUNT; i++) {
1972                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1973                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1974                 rates[i].hw_value_short = i;
1975                 rates[i].flags = 0;
1976                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1977                         /*
1978                          * If CCK != 1M then set short preamble rate flag.
1979                          */
1980                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1981                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1982                 }
1983         }
1984 }
1985
1986 /******************************************************************************
1987  *
1988  * uCode download functions
1989  *
1990  ******************************************************************************/
1991
1992 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1993 {
1994         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1995         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1996         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1997         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1998         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1999         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
2000 }
2001
2002 /**
2003  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2004  *     looking at all data.
2005  */
2006 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2007 {
2008         u32 val;
2009         u32 save_len = len;
2010         int rc = 0;
2011         u32 errcnt;
2012
2013         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2014
2015         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2016                                IWL39_RTC_INST_LOWER_BOUND);
2017
2018         errcnt = 0;
2019         for (; len > 0; len -= sizeof(u32), image++) {
2020                 /* read data comes through single port, auto-incr addr */
2021                 /* NOTE: Use the debugless read so we don't flood kernel log
2022                  * if IWL_DL_IO is set */
2023                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2024                 if (val != le32_to_cpu(*image)) {
2025                         IWL_ERR(priv, "uCode INST section is invalid at "
2026                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2027                                   save_len - len, val, le32_to_cpu(*image));
2028                         rc = -EIO;
2029                         errcnt++;
2030                         if (errcnt >= 20)
2031                                 break;
2032                 }
2033         }
2034
2035
2036         if (!errcnt)
2037                 IWL_DEBUG_INFO(priv,
2038                         "ucode image in INSTRUCTION memory is good\n");
2039
2040         return rc;
2041 }
2042
2043
2044 /**
2045  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2046  *   using sample data 100 bytes apart.  If these sample points are good,
2047  *   it's a pretty good bet that everything between them is good, too.
2048  */
2049 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2050 {
2051         u32 val;
2052         int rc = 0;
2053         u32 errcnt = 0;
2054         u32 i;
2055
2056         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2057
2058         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2059                 /* read data comes through single port, auto-incr addr */
2060                 /* NOTE: Use the debugless read so we don't flood kernel log
2061                  * if IWL_DL_IO is set */
2062                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2063                         i + IWL39_RTC_INST_LOWER_BOUND);
2064                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2065                 if (val != le32_to_cpu(*image)) {
2066 #if 0 /* Enable this if you want to see details */
2067                         IWL_ERR(priv, "uCode INST section is invalid at "
2068                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2069                                   i, val, *image);
2070 #endif
2071                         rc = -EIO;
2072                         errcnt++;
2073                         if (errcnt >= 3)
2074                                 break;
2075                 }
2076         }
2077
2078         return rc;
2079 }
2080
2081
2082 /**
2083  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2084  *    and verify its contents
2085  */
2086 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2087 {
2088         __le32 *image;
2089         u32 len;
2090         int rc = 0;
2091
2092         /* Try bootstrap */
2093         image = (__le32 *)priv->ucode_boot.v_addr;
2094         len = priv->ucode_boot.len;
2095         rc = iwl3945_verify_inst_sparse(priv, image, len);
2096         if (rc == 0) {
2097                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2098                 return 0;
2099         }
2100
2101         /* Try initialize */
2102         image = (__le32 *)priv->ucode_init.v_addr;
2103         len = priv->ucode_init.len;
2104         rc = iwl3945_verify_inst_sparse(priv, image, len);
2105         if (rc == 0) {
2106                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2107                 return 0;
2108         }
2109
2110         /* Try runtime/protocol */
2111         image = (__le32 *)priv->ucode_code.v_addr;
2112         len = priv->ucode_code.len;
2113         rc = iwl3945_verify_inst_sparse(priv, image, len);
2114         if (rc == 0) {
2115                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2116                 return 0;
2117         }
2118
2119         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2120
2121         /* Since nothing seems to match, show first several data entries in
2122          * instruction SRAM, so maybe visual inspection will give a clue.
2123          * Selection of bootstrap image (vs. other images) is arbitrary. */
2124         image = (__le32 *)priv->ucode_boot.v_addr;
2125         len = priv->ucode_boot.len;
2126         rc = iwl3945_verify_inst_full(priv, image, len);
2127
2128         return rc;
2129 }
2130
2131 static void iwl3945_nic_start(struct iwl_priv *priv)
2132 {
2133         /* Remove all resets to allow NIC to operate */
2134         iwl_write32(priv, CSR_RESET, 0);
2135 }
2136
2137 /**
2138  * iwl3945_read_ucode - Read uCode images from disk file.
2139  *
2140  * Copy into buffers for card to fetch via bus-mastering
2141  */
2142 static int iwl3945_read_ucode(struct iwl_priv *priv)
2143 {
2144         const struct iwl_ucode_header *ucode;
2145         int ret = -EINVAL, index;
2146         const struct firmware *ucode_raw;
2147         /* firmware file name contains uCode/driver compatibility version */
2148         const char *name_pre = priv->cfg->fw_name_pre;
2149         const unsigned int api_max = priv->cfg->ucode_api_max;
2150         const unsigned int api_min = priv->cfg->ucode_api_min;
2151         char buf[25];
2152         u8 *src;
2153         size_t len;
2154         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2155
2156         /* Ask kernel firmware_class module to get the boot firmware off disk.
2157          * request_firmware() is synchronous, file is in memory on return. */
2158         for (index = api_max; index >= api_min; index--) {
2159                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2160                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2161                 if (ret < 0) {
2162                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2163                                   buf, ret);
2164                         if (ret == -ENOENT)
2165                                 continue;
2166                         else
2167                                 goto error;
2168                 } else {
2169                         if (index < api_max)
2170                                 IWL_ERR(priv, "Loaded firmware %s, "
2171                                         "which is deprecated. "
2172                                         " Please use API v%u instead.\n",
2173                                           buf, api_max);
2174                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2175                                        "(%zd bytes) from disk\n",
2176                                        buf, ucode_raw->size);
2177                         break;
2178                 }
2179         }
2180
2181         if (ret < 0)
2182                 goto error;
2183
2184         /* Make sure that we got at least our header! */
2185         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2186                 IWL_ERR(priv, "File size way too small!\n");
2187                 ret = -EINVAL;
2188                 goto err_release;
2189         }
2190
2191         /* Data from ucode file:  header followed by uCode images */
2192         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2193
2194         priv->ucode_ver = le32_to_cpu(ucode->ver);
2195         api_ver = IWL_UCODE_API(priv->ucode_ver);
2196         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2197         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2198         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2199         init_data_size =
2200                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2201         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2202         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2203
2204         /* api_ver should match the api version forming part of the
2205          * firmware filename ... but we don't check for that and only rely
2206          * on the API version read from firmware header from here on forward */
2207
2208         if (api_ver < api_min || api_ver > api_max) {
2209                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2210                           "Driver supports v%u, firmware is v%u.\n",
2211                           api_max, api_ver);
2212                 priv->ucode_ver = 0;
2213                 ret = -EINVAL;
2214                 goto err_release;
2215         }
2216         if (api_ver != api_max)
2217                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2218                           "got %u. New firmware can be obtained "
2219                           "from http://www.intellinuxwireless.org.\n",
2220                           api_max, api_ver);
2221
2222         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2223                 IWL_UCODE_MAJOR(priv->ucode_ver),
2224                 IWL_UCODE_MINOR(priv->ucode_ver),
2225                 IWL_UCODE_API(priv->ucode_ver),
2226                 IWL_UCODE_SERIAL(priv->ucode_ver));
2227
2228         snprintf(priv->hw->wiphy->fw_version,
2229                  sizeof(priv->hw->wiphy->fw_version),
2230                  "%u.%u.%u.%u",
2231                  IWL_UCODE_MAJOR(priv->ucode_ver),
2232                  IWL_UCODE_MINOR(priv->ucode_ver),
2233                  IWL_UCODE_API(priv->ucode_ver),
2234                  IWL_UCODE_SERIAL(priv->ucode_ver));
2235
2236         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2237                        priv->ucode_ver);
2238         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2239                        inst_size);
2240         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2241                        data_size);
2242         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2243                        init_size);
2244         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2245                        init_data_size);
2246         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2247                        boot_size);
2248
2249
2250         /* Verify size of file vs. image size info in file's header */
2251         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2252                 inst_size + data_size + init_size +
2253                 init_data_size + boot_size) {
2254
2255                 IWL_DEBUG_INFO(priv,
2256                         "uCode file size %zd does not match expected size\n",
2257                         ucode_raw->size);
2258                 ret = -EINVAL;
2259                 goto err_release;
2260         }
2261
2262         /* Verify that uCode images will fit in card's SRAM */
2263         if (inst_size > IWL39_MAX_INST_SIZE) {
2264                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2265                                inst_size);
2266                 ret = -EINVAL;
2267                 goto err_release;
2268         }
2269
2270         if (data_size > IWL39_MAX_DATA_SIZE) {
2271                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2272                                data_size);
2273                 ret = -EINVAL;
2274                 goto err_release;
2275         }
2276         if (init_size > IWL39_MAX_INST_SIZE) {
2277                 IWL_DEBUG_INFO(priv,
2278                                 "uCode init instr len %d too large to fit in\n",
2279                                 init_size);
2280                 ret = -EINVAL;
2281                 goto err_release;
2282         }
2283         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2284                 IWL_DEBUG_INFO(priv,
2285                                 "uCode init data len %d too large to fit in\n",
2286                                 init_data_size);
2287                 ret = -EINVAL;
2288                 goto err_release;
2289         }
2290         if (boot_size > IWL39_MAX_BSM_SIZE) {
2291                 IWL_DEBUG_INFO(priv,
2292                                 "uCode boot instr len %d too large to fit in\n",
2293                                 boot_size);
2294                 ret = -EINVAL;
2295                 goto err_release;
2296         }
2297
2298         /* Allocate ucode buffers for card's bus-master loading ... */
2299
2300         /* Runtime instructions and 2 copies of data:
2301          * 1) unmodified from disk
2302          * 2) backup cache for save/restore during power-downs */
2303         priv->ucode_code.len = inst_size;
2304         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2305
2306         priv->ucode_data.len = data_size;
2307         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2308
2309         priv->ucode_data_backup.len = data_size;
2310         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2311
2312         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2313             !priv->ucode_data_backup.v_addr)
2314                 goto err_pci_alloc;
2315
2316         /* Initialization instructions and data */
2317         if (init_size && init_data_size) {
2318                 priv->ucode_init.len = init_size;
2319                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2320
2321                 priv->ucode_init_data.len = init_data_size;
2322                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2323
2324                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2325                         goto err_pci_alloc;
2326         }
2327
2328         /* Bootstrap (instructions only, no data) */
2329         if (boot_size) {
2330                 priv->ucode_boot.len = boot_size;
2331                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2332
2333                 if (!priv->ucode_boot.v_addr)
2334                         goto err_pci_alloc;
2335         }
2336
2337         /* Copy images into buffers for card's bus-master reads ... */
2338
2339         /* Runtime instructions (first block of data in file) */
2340         len = inst_size;
2341         IWL_DEBUG_INFO(priv,
2342                 "Copying (but not loading) uCode instr len %zd\n", len);
2343         memcpy(priv->ucode_code.v_addr, src, len);
2344         src += len;
2345
2346         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2347                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2348
2349         /* Runtime data (2nd block)
2350          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2351         len = data_size;
2352         IWL_DEBUG_INFO(priv,
2353                 "Copying (but not loading) uCode data len %zd\n", len);
2354         memcpy(priv->ucode_data.v_addr, src, len);
2355         memcpy(priv->ucode_data_backup.v_addr, src, len);
2356         src += len;
2357
2358         /* Initialization instructions (3rd block) */
2359         if (init_size) {
2360                 len = init_size;
2361                 IWL_DEBUG_INFO(priv,
2362                         "Copying (but not loading) init instr len %zd\n", len);
2363                 memcpy(priv->ucode_init.v_addr, src, len);
2364                 src += len;
2365         }
2366
2367         /* Initialization data (4th block) */
2368         if (init_data_size) {
2369                 len = init_data_size;
2370                 IWL_DEBUG_INFO(priv,
2371                         "Copying (but not loading) init data len %zd\n", len);
2372                 memcpy(priv->ucode_init_data.v_addr, src, len);
2373                 src += len;
2374         }
2375
2376         /* Bootstrap instructions (5th block) */
2377         len = boot_size;
2378         IWL_DEBUG_INFO(priv,
2379                 "Copying (but not loading) boot instr len %zd\n", len);
2380         memcpy(priv->ucode_boot.v_addr, src, len);
2381
2382         /* We have our copies now, allow OS release its copies */
2383         release_firmware(ucode_raw);
2384         return 0;
2385
2386  err_pci_alloc:
2387         IWL_ERR(priv, "failed to allocate pci memory\n");
2388         ret = -ENOMEM;
2389         iwl3945_dealloc_ucode_pci(priv);
2390
2391  err_release:
2392         release_firmware(ucode_raw);
2393
2394  error:
2395         return ret;
2396 }
2397
2398
2399 /**
2400  * iwl3945_set_ucode_ptrs - Set uCode address location
2401  *
2402  * Tell initialization uCode where to find runtime uCode.
2403  *
2404  * BSM registers initially contain pointers to initialization uCode.
2405  * We need to replace them to load runtime uCode inst and data,
2406  * and to save runtime data when powering down.
2407  */
2408 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2409 {
2410         dma_addr_t pinst;
2411         dma_addr_t pdata;
2412
2413         /* bits 31:0 for 3945 */
2414         pinst = priv->ucode_code.p_addr;
2415         pdata = priv->ucode_data_backup.p_addr;
2416
2417         /* Tell bootstrap uCode where to find image to load */
2418         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2419         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2420         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2421                                  priv->ucode_data.len);
2422
2423         /* Inst byte count must be last to set up, bit 31 signals uCode
2424          *   that all new ptr/size info is in place */
2425         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2426                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2427
2428         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2429
2430         return 0;
2431 }
2432
2433 /**
2434  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2435  *
2436  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2437  *
2438  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2439  */
2440 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2441 {
2442         /* Check alive response for "valid" sign from uCode */
2443         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2444                 /* We had an error bringing up the hardware, so take it
2445                  * all the way back down so we can try again */
2446                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2447                 goto restart;
2448         }
2449
2450         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2451          * This is a paranoid check, because we would not have gotten the
2452          * "initialize" alive if code weren't properly loaded.  */
2453         if (iwl3945_verify_ucode(priv)) {
2454                 /* Runtime instruction load was bad;
2455                  * take it all the way back down so we can try again */
2456                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2457                 goto restart;
2458         }
2459
2460         /* Send pointers to protocol/runtime uCode image ... init code will
2461          * load and launch runtime uCode, which will send us another "Alive"
2462          * notification. */
2463         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2464         if (iwl3945_set_ucode_ptrs(priv)) {
2465                 /* Runtime instruction load won't happen;
2466                  * take it all the way back down so we can try again */
2467                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2468                 goto restart;
2469         }
2470         return;
2471
2472  restart:
2473         queue_work(priv->workqueue, &priv->restart);
2474 }
2475
2476 /**
2477  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2478  *                   from protocol/runtime uCode (initialization uCode's
2479  *                   Alive gets handled by iwl3945_init_alive_start()).
2480  */
2481 static void iwl3945_alive_start(struct iwl_priv *priv)
2482 {
2483         int thermal_spin = 0;
2484         u32 rfkill;
2485
2486         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2487
2488         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2489                 /* We had an error bringing up the hardware, so take it
2490                  * all the way back down so we can try again */
2491                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2492                 goto restart;
2493         }
2494
2495         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2496          * This is a paranoid check, because we would not have gotten the
2497          * "runtime" alive if code weren't properly loaded.  */
2498         if (iwl3945_verify_ucode(priv)) {
2499                 /* Runtime instruction load was bad;
2500                  * take it all the way back down so we can try again */
2501                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2502                 goto restart;
2503         }
2504
2505         iwl_clear_stations_table(priv);
2506
2507         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2508         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2509
2510         if (rfkill & 0x1) {
2511                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2512                 /* if RFKILL is not on, then wait for thermal
2513                  * sensor in adapter to kick in */
2514                 while (iwl3945_hw_get_temperature(priv) == 0) {
2515                         thermal_spin++;
2516                         udelay(10);
2517                 }
2518
2519                 if (thermal_spin)
2520                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2521                                        thermal_spin * 10);
2522         } else
2523                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2524
2525         /* After the ALIVE response, we can send commands to 3945 uCode */
2526         set_bit(STATUS_ALIVE, &priv->status);
2527
2528         if (iwl_is_rfkill(priv))
2529                 return;
2530
2531         ieee80211_wake_queues(priv->hw);
2532
2533         priv->active_rate = priv->rates_mask;
2534         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2535
2536         iwl_power_update_mode(priv, true);
2537
2538         if (iwl_is_associated(priv)) {
2539                 struct iwl3945_rxon_cmd *active_rxon =
2540                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2541
2542                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2543                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2544         } else {
2545                 /* Initialize our rx_config data */
2546                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2547         }
2548
2549         /* Configure Bluetooth device coexistence support */
2550         iwl_send_bt_config(priv);
2551
2552         /* Configure the adapter for unassociated operation */
2553         iwlcore_commit_rxon(priv);
2554
2555         iwl3945_reg_txpower_periodic(priv);
2556
2557         iwl_leds_init(priv);
2558
2559         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2560         set_bit(STATUS_READY, &priv->status);
2561         wake_up_interruptible(&priv->wait_command_queue);
2562
2563         /* reassociate for ADHOC mode */
2564         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2565                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2566                                                                 priv->vif);
2567                 if (beacon)
2568                         iwl_mac_beacon_update(priv->hw, beacon);
2569         }
2570
2571         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2572                 iwl_set_mode(priv, priv->iw_mode);
2573
2574         return;
2575
2576  restart:
2577         queue_work(priv->workqueue, &priv->restart);
2578 }
2579
2580 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2581
2582 static void __iwl3945_down(struct iwl_priv *priv)
2583 {
2584         unsigned long flags;
2585         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2586         struct ieee80211_conf *conf = NULL;
2587
2588         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2589
2590         conf = ieee80211_get_hw_conf(priv->hw);
2591
2592         if (!exit_pending)
2593                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2594
2595         iwl_clear_stations_table(priv);
2596
2597         /* Unblock any waiting calls */
2598         wake_up_interruptible_all(&priv->wait_command_queue);
2599
2600         /* Wipe out the EXIT_PENDING status bit if we are not actually
2601          * exiting the module */
2602         if (!exit_pending)
2603                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2604
2605         /* stop and reset the on-board processor */
2606         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2607
2608         /* tell the device to stop sending interrupts */
2609         spin_lock_irqsave(&priv->lock, flags);
2610         iwl_disable_interrupts(priv);
2611         spin_unlock_irqrestore(&priv->lock, flags);
2612         iwl_synchronize_irq(priv);
2613
2614         if (priv->mac80211_registered)
2615                 ieee80211_stop_queues(priv->hw);
2616
2617         /* If we have not previously called iwl3945_init() then
2618          * clear all bits but the RF Kill bits and return */
2619         if (!iwl_is_init(priv)) {
2620                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2621                                         STATUS_RF_KILL_HW |
2622                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2623                                         STATUS_GEO_CONFIGURED |
2624                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2625                                         STATUS_EXIT_PENDING;
2626                 goto exit;
2627         }
2628
2629         /* ...otherwise clear out all the status bits but the RF Kill
2630          * bit and continue taking the NIC down. */
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_FW_ERROR, &priv->status) <<
2636                                 STATUS_FW_ERROR |
2637                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2638                                 STATUS_EXIT_PENDING;
2639
2640         iwl3945_hw_txq_ctx_stop(priv);
2641         iwl3945_hw_rxq_stop(priv);
2642
2643         /* Power-down device's busmaster DMA clocks */
2644         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2645         udelay(5);
2646
2647         /* Stop the device, and put it in low power state */
2648         priv->cfg->ops->lib->apm_ops.stop(priv);
2649
2650  exit:
2651         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2652
2653         if (priv->ibss_beacon)
2654                 dev_kfree_skb(priv->ibss_beacon);
2655         priv->ibss_beacon = NULL;
2656
2657         /* clear out any free frames */
2658         iwl3945_clear_free_frames(priv);
2659 }
2660
2661 static void iwl3945_down(struct iwl_priv *priv)
2662 {
2663         mutex_lock(&priv->mutex);
2664         __iwl3945_down(priv);
2665         mutex_unlock(&priv->mutex);
2666
2667         iwl3945_cancel_deferred_work(priv);
2668 }
2669
2670 #define MAX_HW_RESTARTS 5
2671
2672 static int __iwl3945_up(struct iwl_priv *priv)
2673 {
2674         int rc, i;
2675
2676         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2677                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2678                 return -EIO;
2679         }
2680
2681         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2682                 IWL_ERR(priv, "ucode not available for device bring up\n");
2683                 return -EIO;
2684         }
2685
2686         /* If platform's RF_KILL switch is NOT set to KILL */
2687         if (iwl_read32(priv, CSR_GP_CNTRL) &
2688                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2689                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2690         else {
2691                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2692                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2693                 return -ENODEV;
2694         }
2695
2696         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2697
2698         rc = iwl3945_hw_nic_init(priv);
2699         if (rc) {
2700                 IWL_ERR(priv, "Unable to int nic\n");
2701                 return rc;
2702         }
2703
2704         /* make sure rfkill handshake bits are cleared */
2705         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2706         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2707                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2708
2709         /* clear (again), then enable host interrupts */
2710         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2711         iwl_enable_interrupts(priv);
2712
2713         /* really make sure rfkill handshake bits are cleared */
2714         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2715         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2716
2717         /* Copy original ucode data image from disk into backup cache.
2718          * This will be used to initialize the on-board processor's
2719          * data SRAM for a clean start when the runtime program first loads. */
2720         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2721                priv->ucode_data.len);
2722
2723         /* We return success when we resume from suspend and rf_kill is on. */
2724         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2725                 return 0;
2726
2727         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2728
2729                 iwl_clear_stations_table(priv);
2730
2731                 /* load bootstrap state machine,
2732                  * load bootstrap program into processor's memory,
2733                  * prepare to load the "initialize" uCode */
2734                 priv->cfg->ops->lib->load_ucode(priv);
2735
2736                 if (rc) {
2737                         IWL_ERR(priv,
2738                                 "Unable to set up bootstrap uCode: %d\n", rc);
2739                         continue;
2740                 }
2741
2742                 /* start card; "initialize" will load runtime ucode */
2743                 iwl3945_nic_start(priv);
2744
2745                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2746
2747                 return 0;
2748         }
2749
2750         set_bit(STATUS_EXIT_PENDING, &priv->status);
2751         __iwl3945_down(priv);
2752         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2753
2754         /* tried to restart and config the device for as long as our
2755          * patience could withstand */
2756         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2757         return -EIO;
2758 }
2759
2760
2761 /*****************************************************************************
2762  *
2763  * Workqueue callbacks
2764  *
2765  *****************************************************************************/
2766
2767 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2768 {
2769         struct iwl_priv *priv =
2770             container_of(data, struct iwl_priv, init_alive_start.work);
2771
2772         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2773                 return;
2774
2775         mutex_lock(&priv->mutex);
2776         iwl3945_init_alive_start(priv);
2777         mutex_unlock(&priv->mutex);
2778 }
2779
2780 static void iwl3945_bg_alive_start(struct work_struct *data)
2781 {
2782         struct iwl_priv *priv =
2783             container_of(data, struct iwl_priv, alive_start.work);
2784
2785         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2786                 return;
2787
2788         mutex_lock(&priv->mutex);
2789         iwl3945_alive_start(priv);
2790         mutex_unlock(&priv->mutex);
2791 }
2792
2793 /*
2794  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2795  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2796  * *is* readable even when device has been SW_RESET into low power mode
2797  * (e.g. during RF KILL).
2798  */
2799 static void iwl3945_rfkill_poll(struct work_struct *data)
2800 {
2801         struct iwl_priv *priv =
2802             container_of(data, struct iwl_priv, rfkill_poll.work);
2803         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2804         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2805                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2806
2807         if (new_rfkill != old_rfkill) {
2808                 if (new_rfkill)
2809                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2810                 else
2811                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2812
2813                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2814
2815                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2816                                 new_rfkill ? "disable radio" : "enable radio");
2817         }
2818
2819         /* Keep this running, even if radio now enabled.  This will be
2820          * cancelled in mac_start() if system decides to start again */
2821         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2822                            round_jiffies_relative(2 * HZ));
2823
2824 }
2825
2826 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2827 static void iwl3945_bg_request_scan(struct work_struct *data)
2828 {
2829         struct iwl_priv *priv =
2830             container_of(data, struct iwl_priv, request_scan);
2831         struct iwl_host_cmd cmd = {
2832                 .id = REPLY_SCAN_CMD,
2833                 .len = sizeof(struct iwl3945_scan_cmd),
2834                 .flags = CMD_SIZE_HUGE,
2835         };
2836         int rc = 0;
2837         struct iwl3945_scan_cmd *scan;
2838         struct ieee80211_conf *conf = NULL;
2839         u8 n_probes = 0;
2840         enum ieee80211_band band;
2841         bool is_active = false;
2842
2843         conf = ieee80211_get_hw_conf(priv->hw);
2844
2845         mutex_lock(&priv->mutex);
2846
2847         cancel_delayed_work(&priv->scan_check);
2848
2849         if (!iwl_is_ready(priv)) {
2850                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2851                 goto done;
2852         }
2853
2854         /* Make sure the scan wasn't canceled before this queued work
2855          * was given the chance to run... */
2856         if (!test_bit(STATUS_SCANNING, &priv->status))
2857                 goto done;
2858
2859         /* This should never be called or scheduled if there is currently
2860          * a scan active in the hardware. */
2861         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2862                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2863                                 "Ignoring second request.\n");
2864                 rc = -EIO;
2865                 goto done;
2866         }
2867
2868         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2869                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2870                 goto done;
2871         }
2872
2873         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2874                 IWL_DEBUG_HC(priv,
2875                         "Scan request while abort pending. Queuing.\n");
2876                 goto done;
2877         }
2878
2879         if (iwl_is_rfkill(priv)) {
2880                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2881                 goto done;
2882         }
2883
2884         if (!test_bit(STATUS_READY, &priv->status)) {
2885                 IWL_DEBUG_HC(priv,
2886                         "Scan request while uninitialized. Queuing.\n");
2887                 goto done;
2888         }
2889
2890         if (!priv->scan_bands) {
2891                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2892                 goto done;
2893         }
2894
2895         if (!priv->scan) {
2896                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2897                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2898                 if (!priv->scan) {
2899                         rc = -ENOMEM;
2900                         goto done;
2901                 }
2902         }
2903         scan = priv->scan;
2904         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2905
2906         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2907         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2908
2909         if (iwl_is_associated(priv)) {
2910                 u16 interval = 0;
2911                 u32 extra;
2912                 u32 suspend_time = 100;
2913                 u32 scan_suspend_time = 100;
2914                 unsigned long flags;
2915
2916                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2917
2918                 spin_lock_irqsave(&priv->lock, flags);
2919                 interval = priv->beacon_int;
2920                 spin_unlock_irqrestore(&priv->lock, flags);
2921
2922                 scan->suspend_time = 0;
2923                 scan->max_out_time = cpu_to_le32(200 * 1024);
2924                 if (!interval)
2925                         interval = suspend_time;
2926                 /*
2927                  * suspend time format:
2928                  *  0-19: beacon interval in usec (time before exec.)
2929                  * 20-23: 0
2930                  * 24-31: number of beacons (suspend between channels)
2931                  */
2932
2933                 extra = (suspend_time / interval) << 24;
2934                 scan_suspend_time = 0xFF0FFFFF &
2935                     (extra | ((suspend_time % interval) * 1024));
2936
2937                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2938                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2939                                scan_suspend_time, interval);
2940         }
2941
2942         if (priv->scan_request->n_ssids) {
2943                 int i, p = 0;
2944                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2945                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2946                         /* always does wildcard anyway */
2947                         if (!priv->scan_request->ssids[i].ssid_len)
2948                                 continue;
2949                         scan->direct_scan[p].id = WLAN_EID_SSID;
2950                         scan->direct_scan[p].len =
2951                                 priv->scan_request->ssids[i].ssid_len;
2952                         memcpy(scan->direct_scan[p].ssid,
2953                                priv->scan_request->ssids[i].ssid,
2954                                priv->scan_request->ssids[i].ssid_len);
2955                         n_probes++;
2956                         p++;
2957                 }
2958                 is_active = true;
2959         } else
2960                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2961
2962         /* We don't build a direct scan probe request; the uCode will do
2963          * that based on the direct_mask added to each channel entry */
2964         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2965         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2966         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2967
2968         /* flags + rate selection */
2969
2970         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2971                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2972                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2973                 scan->good_CRC_th = 0;
2974                 band = IEEE80211_BAND_2GHZ;
2975         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2976                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2977                 /*
2978                  * If active scaning is requested but a certain channel
2979                  * is marked passive, we can do active scanning if we
2980                  * detect transmissions.
2981                  */
2982                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2983                 band = IEEE80211_BAND_5GHZ;
2984         } else {
2985                 IWL_WARN(priv, "Invalid scan band count\n");
2986                 goto done;
2987         }
2988
2989         scan->tx_cmd.len = cpu_to_le16(
2990                         iwl_fill_probe_req(priv,
2991                                 (struct ieee80211_mgmt *)scan->data,
2992                                 priv->scan_request->ie,
2993                                 priv->scan_request->ie_len,
2994                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2995
2996         /* select Rx antennas */
2997         scan->flags |= iwl3945_get_antenna_flags(priv);
2998
2999         if (iwl_is_monitor_mode(priv))
3000                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
3001
3002         scan->channel_count =
3003                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3004                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3005
3006         if (scan->channel_count == 0) {
3007                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3008                 goto done;
3009         }
3010
3011         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3012             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3013         cmd.data = scan;
3014         scan->len = cpu_to_le16(cmd.len);
3015
3016         set_bit(STATUS_SCAN_HW, &priv->status);
3017         rc = iwl_send_cmd_sync(priv, &cmd);
3018         if (rc)
3019                 goto done;
3020
3021         queue_delayed_work(priv->workqueue, &priv->scan_check,
3022                            IWL_SCAN_CHECK_WATCHDOG);
3023
3024         mutex_unlock(&priv->mutex);
3025         return;
3026
3027  done:
3028         /* can not perform scan make sure we clear scanning
3029          * bits from status so next scan request can be performed.
3030          * if we dont clear scanning status bit here all next scan
3031          * will fail
3032         */
3033         clear_bit(STATUS_SCAN_HW, &priv->status);
3034         clear_bit(STATUS_SCANNING, &priv->status);
3035
3036         /* inform mac80211 scan aborted */
3037         queue_work(priv->workqueue, &priv->scan_completed);
3038         mutex_unlock(&priv->mutex);
3039 }
3040
3041 static void iwl3945_bg_up(struct work_struct *data)
3042 {
3043         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3044
3045         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3046                 return;
3047
3048         mutex_lock(&priv->mutex);
3049         __iwl3945_up(priv);
3050         mutex_unlock(&priv->mutex);
3051 }
3052
3053 static void iwl3945_bg_restart(struct work_struct *data)
3054 {
3055         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3056
3057         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3058                 return;
3059
3060         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3061                 mutex_lock(&priv->mutex);
3062                 priv->vif = NULL;
3063                 priv->is_open = 0;
3064                 mutex_unlock(&priv->mutex);
3065                 iwl3945_down(priv);
3066                 ieee80211_restart_hw(priv->hw);
3067         } else {
3068                 iwl3945_down(priv);
3069                 queue_work(priv->workqueue, &priv->up);
3070         }
3071 }
3072
3073 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3074 {
3075         struct iwl_priv *priv =
3076             container_of(data, struct iwl_priv, rx_replenish);
3077
3078         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3079                 return;
3080
3081         mutex_lock(&priv->mutex);
3082         iwl3945_rx_replenish(priv);
3083         mutex_unlock(&priv->mutex);
3084 }
3085
3086 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3087
3088 void iwl3945_post_associate(struct iwl_priv *priv)
3089 {
3090         int rc = 0;
3091         struct ieee80211_conf *conf = NULL;
3092
3093         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3094                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3095                 return;
3096         }
3097
3098
3099         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3100                         priv->assoc_id, priv->active_rxon.bssid_addr);
3101
3102         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3103                 return;
3104
3105         if (!priv->vif || !priv->is_open)
3106                 return;
3107
3108         iwl_scan_cancel_timeout(priv, 200);
3109
3110         conf = ieee80211_get_hw_conf(priv->hw);
3111
3112         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3113         iwlcore_commit_rxon(priv);
3114
3115         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3116         iwl_setup_rxon_timing(priv);
3117         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3118                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3119         if (rc)
3120                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3121                             "Attempting to continue.\n");
3122
3123         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3124
3125         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3126
3127         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3128                         priv->assoc_id, priv->beacon_int);
3129
3130         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3131                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3132         else
3133                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3134
3135         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3136                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3137                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3138                 else
3139                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3140
3141                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3142                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3143
3144         }
3145
3146         iwlcore_commit_rxon(priv);
3147
3148         switch (priv->iw_mode) {
3149         case NL80211_IFTYPE_STATION:
3150                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3151                 break;
3152
3153         case NL80211_IFTYPE_ADHOC:
3154
3155                 priv->assoc_id = 1;
3156                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3157                 iwl3945_sync_sta(priv, IWL_STA_ID,
3158                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3159                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3160                                  CMD_ASYNC);
3161                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3162                 iwl3945_send_beacon_cmd(priv);
3163
3164                 break;
3165
3166         default:
3167                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3168                            __func__, priv->iw_mode);
3169                 break;
3170         }
3171
3172         iwl_activate_qos(priv, 0);
3173
3174         /* we have just associated, don't start scan too early */
3175         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3176 }
3177
3178 /*****************************************************************************
3179  *
3180  * mac80211 entry point functions
3181  *
3182  *****************************************************************************/
3183
3184 #define UCODE_READY_TIMEOUT     (2 * HZ)
3185
3186 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3187 {
3188         struct iwl_priv *priv = hw->priv;
3189         int ret;
3190
3191         IWL_DEBUG_MAC80211(priv, "enter\n");
3192
3193         /* we should be verifying the device is ready to be opened */
3194         mutex_lock(&priv->mutex);
3195
3196         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3197          * ucode filename and max sizes are card-specific. */
3198
3199         if (!priv->ucode_code.len) {
3200                 ret = iwl3945_read_ucode(priv);
3201                 if (ret) {
3202                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3203                         mutex_unlock(&priv->mutex);
3204                         goto out_release_irq;
3205                 }
3206         }
3207
3208         ret = __iwl3945_up(priv);
3209
3210         mutex_unlock(&priv->mutex);
3211
3212         if (ret)
3213                 goto out_release_irq;
3214
3215         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3216
3217         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3218          * mac80211 will not be run successfully. */
3219         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3220                         test_bit(STATUS_READY, &priv->status),
3221                         UCODE_READY_TIMEOUT);
3222         if (!ret) {
3223                 if (!test_bit(STATUS_READY, &priv->status)) {
3224                         IWL_ERR(priv,
3225                                 "Wait for START_ALIVE timeout after %dms.\n",
3226                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3227                         ret = -ETIMEDOUT;
3228                         goto out_release_irq;
3229                 }
3230         }
3231
3232         /* ucode is running and will send rfkill notifications,
3233          * no need to poll the killswitch state anymore */
3234         cancel_delayed_work(&priv->rfkill_poll);
3235
3236         iwl_led_start(priv);
3237
3238         priv->is_open = 1;
3239         IWL_DEBUG_MAC80211(priv, "leave\n");
3240         return 0;
3241
3242 out_release_irq:
3243         priv->is_open = 0;
3244         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3245         return ret;
3246 }
3247
3248 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3249 {
3250         struct iwl_priv *priv = hw->priv;
3251
3252         IWL_DEBUG_MAC80211(priv, "enter\n");
3253
3254         if (!priv->is_open) {
3255                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3256                 return;
3257         }
3258
3259         priv->is_open = 0;
3260
3261         if (iwl_is_ready_rf(priv)) {
3262                 /* stop mac, cancel any scan request and clear
3263                  * RXON_FILTER_ASSOC_MSK BIT
3264                  */
3265                 mutex_lock(&priv->mutex);
3266                 iwl_scan_cancel_timeout(priv, 100);
3267                 mutex_unlock(&priv->mutex);
3268         }
3269
3270         iwl3945_down(priv);
3271
3272         flush_workqueue(priv->workqueue);
3273
3274         /* start polling the killswitch state again */
3275         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3276                            round_jiffies_relative(2 * HZ));
3277
3278         IWL_DEBUG_MAC80211(priv, "leave\n");
3279 }
3280
3281 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3282 {
3283         struct iwl_priv *priv = hw->priv;
3284
3285         IWL_DEBUG_MAC80211(priv, "enter\n");
3286
3287         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3288                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3289
3290         if (iwl3945_tx_skb(priv, skb))
3291                 dev_kfree_skb_any(skb);
3292
3293         IWL_DEBUG_MAC80211(priv, "leave\n");
3294         return NETDEV_TX_OK;
3295 }
3296
3297 void iwl3945_config_ap(struct iwl_priv *priv)
3298 {
3299         int rc = 0;
3300
3301         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3302                 return;
3303
3304         /* The following should be done only at AP bring up */
3305         if (!(iwl_is_associated(priv))) {
3306
3307                 /* RXON - unassoc (to set timing command) */
3308                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3309                 iwlcore_commit_rxon(priv);
3310
3311                 /* RXON Timing */
3312                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3313                 iwl_setup_rxon_timing(priv);
3314                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3315                                       sizeof(priv->rxon_timing),
3316                                       &priv->rxon_timing);
3317                 if (rc)
3318                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3319                                         "Attempting to continue.\n");
3320
3321                 /* FIXME: what should be the assoc_id for AP? */
3322                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3323                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3324                         priv->staging_rxon.flags |=
3325                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3326                 else
3327                         priv->staging_rxon.flags &=
3328                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3329
3330                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3331                         if (priv->assoc_capability &
3332                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3333                                 priv->staging_rxon.flags |=
3334                                         RXON_FLG_SHORT_SLOT_MSK;
3335                         else
3336                                 priv->staging_rxon.flags &=
3337                                         ~RXON_FLG_SHORT_SLOT_MSK;
3338
3339                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3340                                 priv->staging_rxon.flags &=
3341                                         ~RXON_FLG_SHORT_SLOT_MSK;
3342                 }
3343                 /* restore RXON assoc */
3344                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3345                 iwlcore_commit_rxon(priv);
3346                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3347         }
3348         iwl3945_send_beacon_cmd(priv);
3349
3350         /* FIXME - we need to add code here to detect a totally new
3351          * configuration, reset the AP, unassoc, rxon timing, assoc,
3352          * clear sta table, add BCAST sta... */
3353 }
3354
3355 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3356                                struct ieee80211_vif *vif,
3357                                struct ieee80211_sta *sta,
3358                                struct ieee80211_key_conf *key)
3359 {
3360         struct iwl_priv *priv = hw->priv;
3361         const u8 *addr;
3362         int ret = 0;
3363         u8 sta_id = IWL_INVALID_STATION;
3364         u8 static_key;
3365
3366         IWL_DEBUG_MAC80211(priv, "enter\n");
3367
3368         if (iwl3945_mod_params.sw_crypto) {
3369                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3370                 return -EOPNOTSUPP;
3371         }
3372
3373         addr = sta ? sta->addr : iwl_bcast_addr;
3374         static_key = !iwl_is_associated(priv);
3375
3376         if (!static_key) {
3377                 sta_id = iwl_find_station(priv, addr);
3378                 if (sta_id == IWL_INVALID_STATION) {
3379                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3380                                             addr);
3381                         return -EINVAL;
3382                 }
3383         }
3384
3385         mutex_lock(&priv->mutex);
3386         iwl_scan_cancel_timeout(priv, 100);
3387         mutex_unlock(&priv->mutex);
3388
3389         switch (cmd) {
3390         case SET_KEY:
3391                 if (static_key)
3392                         ret = iwl3945_set_static_key(priv, key);
3393                 else
3394                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3395                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3396                 break;
3397         case DISABLE_KEY:
3398                 if (static_key)
3399                         ret = iwl3945_remove_static_key(priv);
3400                 else
3401                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3402                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3403                 break;
3404         default:
3405                 ret = -EINVAL;
3406         }
3407
3408         IWL_DEBUG_MAC80211(priv, "leave\n");
3409
3410         return ret;
3411 }
3412
3413 /*****************************************************************************
3414  *
3415  * sysfs attributes
3416  *
3417  *****************************************************************************/
3418
3419 #ifdef CONFIG_IWLWIFI_DEBUG
3420
3421 /*
3422  * The following adds a new attribute to the sysfs representation
3423  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3424  * used for controlling the debug level.
3425  *
3426  * See the level definitions in iwl for details.
3427  *
3428  * The debug_level being managed using sysfs below is a per device debug
3429  * level that is used instead of the global debug level if it (the per
3430  * device debug level) is set.
3431  */
3432 static ssize_t show_debug_level(struct device *d,
3433                                 struct device_attribute *attr, char *buf)
3434 {
3435         struct iwl_priv *priv = dev_get_drvdata(d);
3436         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3437 }
3438 static ssize_t store_debug_level(struct device *d,
3439                                 struct device_attribute *attr,
3440                                  const char *buf, size_t count)
3441 {
3442         struct iwl_priv *priv = dev_get_drvdata(d);
3443         unsigned long val;
3444         int ret;
3445
3446         ret = strict_strtoul(buf, 0, &val);
3447         if (ret)
3448                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3449         else {
3450                 priv->debug_level = val;
3451                 if (iwl_alloc_traffic_mem(priv))
3452                         IWL_ERR(priv,
3453                                 "Not enough memory to generate traffic log\n");
3454         }
3455         return strnlen(buf, count);
3456 }
3457
3458 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3459                         show_debug_level, store_debug_level);
3460
3461 #endif /* CONFIG_IWLWIFI_DEBUG */
3462
3463 static ssize_t show_temperature(struct device *d,
3464                                 struct device_attribute *attr, char *buf)
3465 {
3466         struct iwl_priv *priv = dev_get_drvdata(d);
3467
3468         if (!iwl_is_alive(priv))
3469                 return -EAGAIN;
3470
3471         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3472 }
3473
3474 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3475
3476 static ssize_t show_tx_power(struct device *d,
3477                              struct device_attribute *attr, char *buf)
3478 {
3479         struct iwl_priv *priv = dev_get_drvdata(d);
3480         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3481 }
3482
3483 static ssize_t store_tx_power(struct device *d,
3484                               struct device_attribute *attr,
3485                               const char *buf, size_t count)
3486 {
3487         struct iwl_priv *priv = dev_get_drvdata(d);
3488         char *p = (char *)buf;
3489         u32 val;
3490
3491         val = simple_strtoul(p, &p, 10);
3492         if (p == buf)
3493                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3494         else
3495                 iwl3945_hw_reg_set_txpower(priv, val);
3496
3497         return count;
3498 }
3499
3500 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3501
3502 static ssize_t show_flags(struct device *d,
3503                           struct device_attribute *attr, char *buf)
3504 {
3505         struct iwl_priv *priv = dev_get_drvdata(d);
3506
3507         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3508 }
3509
3510 static ssize_t store_flags(struct device *d,
3511                            struct device_attribute *attr,
3512                            const char *buf, size_t count)
3513 {
3514         struct iwl_priv *priv = dev_get_drvdata(d);
3515         u32 flags = simple_strtoul(buf, NULL, 0);
3516
3517         mutex_lock(&priv->mutex);
3518         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3519                 /* Cancel any currently running scans... */
3520                 if (iwl_scan_cancel_timeout(priv, 100))
3521                         IWL_WARN(priv, "Could not cancel scan.\n");
3522                 else {
3523                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3524                                        flags);
3525                         priv->staging_rxon.flags = cpu_to_le32(flags);
3526                         iwlcore_commit_rxon(priv);
3527                 }
3528         }
3529         mutex_unlock(&priv->mutex);
3530
3531         return count;
3532 }
3533
3534 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3535
3536 static ssize_t show_filter_flags(struct device *d,
3537                                  struct device_attribute *attr, char *buf)
3538 {
3539         struct iwl_priv *priv = dev_get_drvdata(d);
3540
3541         return sprintf(buf, "0x%04X\n",
3542                 le32_to_cpu(priv->active_rxon.filter_flags));
3543 }
3544
3545 static ssize_t store_filter_flags(struct device *d,
3546                                   struct device_attribute *attr,
3547                                   const char *buf, size_t count)
3548 {
3549         struct iwl_priv *priv = dev_get_drvdata(d);
3550         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3551
3552         mutex_lock(&priv->mutex);
3553         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3554                 /* Cancel any currently running scans... */
3555                 if (iwl_scan_cancel_timeout(priv, 100))
3556                         IWL_WARN(priv, "Could not cancel scan.\n");
3557                 else {
3558                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3559                                        "0x%04X\n", filter_flags);
3560                         priv->staging_rxon.filter_flags =
3561                                 cpu_to_le32(filter_flags);
3562                         iwlcore_commit_rxon(priv);
3563                 }
3564         }
3565         mutex_unlock(&priv->mutex);
3566
3567         return count;
3568 }
3569
3570 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3571                    store_filter_flags);
3572
3573 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3574
3575 static ssize_t show_measurement(struct device *d,
3576                                 struct device_attribute *attr, char *buf)
3577 {
3578         struct iwl_priv *priv = dev_get_drvdata(d);
3579         struct iwl_spectrum_notification measure_report;
3580         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3581         u8 *data = (u8 *)&measure_report;
3582         unsigned long flags;
3583
3584         spin_lock_irqsave(&priv->lock, flags);
3585         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3586                 spin_unlock_irqrestore(&priv->lock, flags);
3587                 return 0;
3588         }
3589         memcpy(&measure_report, &priv->measure_report, size);
3590         priv->measurement_status = 0;
3591         spin_unlock_irqrestore(&priv->lock, flags);
3592
3593         while (size && (PAGE_SIZE - len)) {
3594                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3595                                    PAGE_SIZE - len, 1);
3596                 len = strlen(buf);
3597                 if (PAGE_SIZE - len)
3598                         buf[len++] = '\n';
3599
3600                 ofs += 16;
3601                 size -= min(size, 16U);
3602         }
3603
3604         return len;
3605 }
3606
3607 static ssize_t store_measurement(struct device *d,
3608                                  struct device_attribute *attr,
3609                                  const char *buf, size_t count)
3610 {
3611         struct iwl_priv *priv = dev_get_drvdata(d);
3612         struct ieee80211_measurement_params params = {
3613                 .channel = le16_to_cpu(priv->active_rxon.channel),
3614                 .start_time = cpu_to_le64(priv->last_tsf),
3615                 .duration = cpu_to_le16(1),
3616         };
3617         u8 type = IWL_MEASURE_BASIC;
3618         u8 buffer[32];
3619         u8 channel;
3620
3621         if (count) {
3622                 char *p = buffer;
3623                 strncpy(buffer, buf, min(sizeof(buffer), count));
3624                 channel = simple_strtoul(p, NULL, 0);
3625                 if (channel)
3626                         params.channel = channel;
3627
3628                 p = buffer;
3629                 while (*p && *p != ' ')
3630                         p++;
3631                 if (*p)
3632                         type = simple_strtoul(p + 1, NULL, 0);
3633         }
3634
3635         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3636                        "channel %d (for '%s')\n", type, params.channel, buf);
3637         iwl3945_get_measurement(priv, &params, type);
3638
3639         return count;
3640 }
3641
3642 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3643                    show_measurement, store_measurement);
3644 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3645
3646 static ssize_t store_retry_rate(struct device *d,
3647                                 struct device_attribute *attr,
3648                                 const char *buf, size_t count)
3649 {
3650         struct iwl_priv *priv = dev_get_drvdata(d);
3651
3652         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3653         if (priv->retry_rate <= 0)
3654                 priv->retry_rate = 1;
3655
3656         return count;
3657 }
3658
3659 static ssize_t show_retry_rate(struct device *d,
3660                                struct device_attribute *attr, char *buf)
3661 {
3662         struct iwl_priv *priv = dev_get_drvdata(d);
3663         return sprintf(buf, "%d", priv->retry_rate);
3664 }
3665
3666 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3667                    store_retry_rate);
3668
3669
3670 static ssize_t show_channels(struct device *d,
3671                              struct device_attribute *attr, char *buf)
3672 {
3673         /* all this shit doesn't belong into sysfs anyway */
3674         return 0;
3675 }
3676
3677 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3678
3679 static ssize_t show_statistics(struct device *d,
3680                                struct device_attribute *attr, char *buf)
3681 {
3682         struct iwl_priv *priv = dev_get_drvdata(d);
3683         u32 size = sizeof(struct iwl3945_notif_statistics);
3684         u32 len = 0, ofs = 0;
3685         u8 *data = (u8 *)&priv->statistics_39;
3686         int rc = 0;
3687
3688         if (!iwl_is_alive(priv))
3689                 return -EAGAIN;
3690
3691         mutex_lock(&priv->mutex);
3692         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3693         mutex_unlock(&priv->mutex);
3694
3695         if (rc) {
3696                 len = sprintf(buf,
3697                               "Error sending statistics request: 0x%08X\n", rc);
3698                 return len;
3699         }
3700
3701         while (size && (PAGE_SIZE - len)) {
3702                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3703                                    PAGE_SIZE - len, 1);
3704                 len = strlen(buf);
3705                 if (PAGE_SIZE - len)
3706                         buf[len++] = '\n';
3707
3708                 ofs += 16;
3709                 size -= min(size, 16U);
3710         }
3711
3712         return len;
3713 }
3714
3715 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3716
3717 static ssize_t show_antenna(struct device *d,
3718                             struct device_attribute *attr, char *buf)
3719 {
3720         struct iwl_priv *priv = dev_get_drvdata(d);
3721
3722         if (!iwl_is_alive(priv))
3723                 return -EAGAIN;
3724
3725         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3726 }
3727
3728 static ssize_t store_antenna(struct device *d,
3729                              struct device_attribute *attr,
3730                              const char *buf, size_t count)
3731 {
3732         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3733         int ant;
3734
3735         if (count == 0)
3736                 return 0;
3737
3738         if (sscanf(buf, "%1i", &ant) != 1) {
3739                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3740                 return count;
3741         }
3742
3743         if ((ant >= 0) && (ant <= 2)) {
3744                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3745                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3746         } else
3747                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3748
3749
3750         return count;
3751 }
3752
3753 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3754
3755 static ssize_t show_status(struct device *d,
3756                            struct device_attribute *attr, char *buf)
3757 {
3758         struct iwl_priv *priv = dev_get_drvdata(d);
3759         if (!iwl_is_alive(priv))
3760                 return -EAGAIN;
3761         return sprintf(buf, "0x%08x\n", (int)priv->status);
3762 }
3763
3764 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3765
3766 static ssize_t dump_error_log(struct device *d,
3767                               struct device_attribute *attr,
3768                               const char *buf, size_t count)
3769 {
3770         struct iwl_priv *priv = dev_get_drvdata(d);
3771         char *p = (char *)buf;
3772
3773         if (p[0] == '1')
3774                 iwl3945_dump_nic_error_log(priv);
3775
3776         return strnlen(buf, count);
3777 }
3778
3779 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3780
3781 /*****************************************************************************
3782  *
3783  * driver setup and tear down
3784  *
3785  *****************************************************************************/
3786
3787 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3788 {
3789         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3790
3791         init_waitqueue_head(&priv->wait_command_queue);
3792
3793         INIT_WORK(&priv->up, iwl3945_bg_up);
3794         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3795         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3796         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3797         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3798         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3799         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3800         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3801         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3802         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3803         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3804
3805         iwl3945_hw_setup_deferred_work(priv);
3806
3807         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3808                      iwl3945_irq_tasklet, (unsigned long)priv);
3809 }
3810
3811 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3812 {
3813         iwl3945_hw_cancel_deferred_work(priv);
3814
3815         cancel_delayed_work_sync(&priv->init_alive_start);
3816         cancel_delayed_work(&priv->scan_check);
3817         cancel_delayed_work(&priv->alive_start);
3818         cancel_work_sync(&priv->beacon_update);
3819 }
3820
3821 static struct attribute *iwl3945_sysfs_entries[] = {
3822         &dev_attr_antenna.attr,
3823         &dev_attr_channels.attr,
3824         &dev_attr_dump_errors.attr,
3825         &dev_attr_flags.attr,
3826         &dev_attr_filter_flags.attr,
3827 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3828         &dev_attr_measurement.attr,
3829 #endif
3830         &dev_attr_retry_rate.attr,
3831         &dev_attr_statistics.attr,
3832         &dev_attr_status.attr,
3833         &dev_attr_temperature.attr,
3834         &dev_attr_tx_power.attr,
3835 #ifdef CONFIG_IWLWIFI_DEBUG
3836         &dev_attr_debug_level.attr,
3837 #endif
3838         NULL
3839 };
3840
3841 static struct attribute_group iwl3945_attribute_group = {
3842         .name = NULL,           /* put in device directory */
3843         .attrs = iwl3945_sysfs_entries,
3844 };
3845
3846 static struct ieee80211_ops iwl3945_hw_ops = {
3847         .tx = iwl3945_mac_tx,
3848         .start = iwl3945_mac_start,
3849         .stop = iwl3945_mac_stop,
3850         .add_interface = iwl_mac_add_interface,
3851         .remove_interface = iwl_mac_remove_interface,
3852         .config = iwl_mac_config,
3853         .configure_filter = iwl_configure_filter,
3854         .set_key = iwl3945_mac_set_key,
3855         .get_tx_stats = iwl_mac_get_tx_stats,
3856         .conf_tx = iwl_mac_conf_tx,
3857         .reset_tsf = iwl_mac_reset_tsf,
3858         .bss_info_changed = iwl_bss_info_changed,
3859         .hw_scan = iwl_mac_hw_scan
3860 };
3861
3862 static int iwl3945_init_drv(struct iwl_priv *priv)
3863 {
3864         int ret;
3865         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3866
3867         priv->retry_rate = 1;
3868         priv->ibss_beacon = NULL;
3869
3870         spin_lock_init(&priv->lock);
3871         spin_lock_init(&priv->sta_lock);
3872         spin_lock_init(&priv->hcmd_lock);
3873
3874         INIT_LIST_HEAD(&priv->free_frames);
3875
3876         mutex_init(&priv->mutex);
3877
3878         /* Clear the driver's (not device's) station table */
3879         iwl_clear_stations_table(priv);
3880
3881         priv->ieee_channels = NULL;
3882         priv->ieee_rates = NULL;
3883         priv->band = IEEE80211_BAND_2GHZ;
3884
3885         priv->iw_mode = NL80211_IFTYPE_STATION;
3886
3887         iwl_reset_qos(priv);
3888
3889         priv->qos_data.qos_active = 0;
3890         priv->qos_data.qos_cap.val = 0;
3891
3892         priv->rates_mask = IWL_RATES_MASK;
3893         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3894
3895         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3896                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3897                          eeprom->version);
3898                 ret = -EINVAL;
3899                 goto err;
3900         }
3901         ret = iwl_init_channel_map(priv);
3902         if (ret) {
3903                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3904                 goto err;
3905         }
3906
3907         /* Set up txpower settings in driver for all channels */
3908         if (iwl3945_txpower_set_from_eeprom(priv)) {
3909                 ret = -EIO;
3910                 goto err_free_channel_map;
3911         }
3912
3913         ret = iwlcore_init_geos(priv);
3914         if (ret) {
3915                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3916                 goto err_free_channel_map;
3917         }
3918         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3919
3920         return 0;
3921
3922 err_free_channel_map:
3923         iwl_free_channel_map(priv);
3924 err:
3925         return ret;
3926 }
3927
3928 static int iwl3945_setup_mac(struct iwl_priv *priv)
3929 {
3930         int ret;
3931         struct ieee80211_hw *hw = priv->hw;
3932
3933         hw->rate_control_algorithm = "iwl-3945-rs";
3934         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3935
3936         /* Tell mac80211 our characteristics */
3937         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3938                     IEEE80211_HW_NOISE_DBM |
3939                     IEEE80211_HW_SPECTRUM_MGMT |
3940                     IEEE80211_HW_SUPPORTS_PS |
3941                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3942
3943         hw->wiphy->interface_modes =
3944                 BIT(NL80211_IFTYPE_STATION) |
3945                 BIT(NL80211_IFTYPE_ADHOC);
3946
3947         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
3948                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3949
3950         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3951         /* we create the 802.11 header and a zero-length SSID element */
3952         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3953
3954         /* Default value; 4 EDCA QOS priorities */
3955         hw->queues = 4;
3956
3957         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3958                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3959                         &priv->bands[IEEE80211_BAND_2GHZ];
3960
3961         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3962                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3963                         &priv->bands[IEEE80211_BAND_5GHZ];
3964
3965         ret = ieee80211_register_hw(priv->hw);
3966         if (ret) {
3967                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3968                 return ret;
3969         }
3970         priv->mac80211_registered = 1;
3971
3972         return 0;
3973 }
3974
3975 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3976 {
3977         int err = 0;
3978         struct iwl_priv *priv;
3979         struct ieee80211_hw *hw;
3980         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3981         struct iwl3945_eeprom *eeprom;
3982         unsigned long flags;
3983
3984         /***********************
3985          * 1. Allocating HW data
3986          * ********************/
3987
3988         /* mac80211 allocates memory for this device instance, including
3989          *   space for this driver's private structure */
3990         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3991         if (hw == NULL) {
3992                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3993                 err = -ENOMEM;
3994                 goto out;
3995         }
3996         priv = hw->priv;
3997         SET_IEEE80211_DEV(hw, &pdev->dev);
3998
3999         /*
4000          * Disabling hardware scan means that mac80211 will perform scans
4001          * "the hard way", rather than using device's scan.
4002          */
4003         if (iwl3945_mod_params.disable_hw_scan) {
4004                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4005                 iwl3945_hw_ops.hw_scan = NULL;
4006         }
4007
4008
4009         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4010         priv->cfg = cfg;
4011         priv->pci_dev = pdev;
4012         priv->inta_mask = CSR_INI_SET_MASK;
4013
4014 #ifdef CONFIG_IWLWIFI_DEBUG
4015         atomic_set(&priv->restrict_refcnt, 0);
4016 #endif
4017         if (iwl_alloc_traffic_mem(priv))
4018                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4019
4020         /***************************
4021          * 2. Initializing PCI bus
4022          * *************************/
4023         if (pci_enable_device(pdev)) {
4024                 err = -ENODEV;
4025                 goto out_ieee80211_free_hw;
4026         }
4027
4028         pci_set_master(pdev);
4029
4030         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4031         if (!err)
4032                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4033         if (err) {
4034                 IWL_WARN(priv, "No suitable DMA available.\n");
4035                 goto out_pci_disable_device;
4036         }
4037
4038         pci_set_drvdata(pdev, priv);
4039         err = pci_request_regions(pdev, DRV_NAME);
4040         if (err)
4041                 goto out_pci_disable_device;
4042
4043         /***********************
4044          * 3. Read REV Register
4045          * ********************/
4046         priv->hw_base = pci_iomap(pdev, 0, 0);
4047         if (!priv->hw_base) {
4048                 err = -ENODEV;
4049                 goto out_pci_release_regions;
4050         }
4051
4052         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4053                         (unsigned long long) pci_resource_len(pdev, 0));
4054         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4055
4056         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4057          * PCI Tx retries from interfering with C3 CPU state */
4058         pci_write_config_byte(pdev, 0x41, 0x00);
4059
4060         /* this spin lock will be used in apm_ops.init and EEPROM access
4061          * we should init now
4062          */
4063         spin_lock_init(&priv->reg_lock);
4064
4065         /***********************
4066          * 4. Read EEPROM
4067          * ********************/
4068
4069         /* Read the EEPROM */
4070         err = iwl_eeprom_init(priv);
4071         if (err) {
4072                 IWL_ERR(priv, "Unable to init EEPROM\n");
4073                 goto out_iounmap;
4074         }
4075         /* MAC Address location in EEPROM same for 3945/4965 */
4076         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4077         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4078         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4079         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4080
4081         /***********************
4082          * 5. Setup HW Constants
4083          * ********************/
4084         /* Device-specific setup */
4085         if (iwl3945_hw_set_hw_params(priv)) {
4086                 IWL_ERR(priv, "failed to set hw settings\n");
4087                 goto out_eeprom_free;
4088         }
4089
4090         /***********************
4091          * 6. Setup priv
4092          * ********************/
4093
4094         err = iwl3945_init_drv(priv);
4095         if (err) {
4096                 IWL_ERR(priv, "initializing driver failed\n");
4097                 goto out_unset_hw_params;
4098         }
4099
4100         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4101                 priv->cfg->name);
4102
4103         /***********************
4104          * 7. Setup Services
4105          * ********************/
4106
4107         spin_lock_irqsave(&priv->lock, flags);
4108         iwl_disable_interrupts(priv);
4109         spin_unlock_irqrestore(&priv->lock, flags);
4110
4111         pci_enable_msi(priv->pci_dev);
4112
4113         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4114                           IRQF_SHARED, DRV_NAME, priv);
4115         if (err) {
4116                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4117                 goto out_disable_msi;
4118         }
4119
4120         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4121         if (err) {
4122                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4123                 goto out_release_irq;
4124         }
4125
4126         iwl_set_rxon_channel(priv,
4127                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4128         iwl3945_setup_deferred_work(priv);
4129         iwl3945_setup_rx_handlers(priv);
4130         iwl_power_initialize(priv);
4131
4132         /*********************************
4133          * 8. Setup and Register mac80211
4134          * *******************************/
4135
4136         iwl_enable_interrupts(priv);
4137
4138         err = iwl3945_setup_mac(priv);
4139         if (err)
4140                 goto  out_remove_sysfs;
4141
4142         err = iwl_dbgfs_register(priv, DRV_NAME);
4143         if (err)
4144                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4145
4146         /* Start monitoring the killswitch */
4147         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4148                            2 * HZ);
4149
4150         return 0;
4151
4152  out_remove_sysfs:
4153         destroy_workqueue(priv->workqueue);
4154         priv->workqueue = NULL;
4155         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4156  out_release_irq:
4157         free_irq(priv->pci_dev->irq, priv);
4158  out_disable_msi:
4159         pci_disable_msi(priv->pci_dev);
4160         iwlcore_free_geos(priv);
4161         iwl_free_channel_map(priv);
4162  out_unset_hw_params:
4163         iwl3945_unset_hw_params(priv);
4164  out_eeprom_free:
4165         iwl_eeprom_free(priv);
4166  out_iounmap:
4167         pci_iounmap(pdev, priv->hw_base);
4168  out_pci_release_regions:
4169         pci_release_regions(pdev);
4170  out_pci_disable_device:
4171         pci_set_drvdata(pdev, NULL);
4172         pci_disable_device(pdev);
4173  out_ieee80211_free_hw:
4174         iwl_free_traffic_mem(priv);
4175         ieee80211_free_hw(priv->hw);
4176  out:
4177         return err;
4178 }
4179
4180 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4181 {
4182         struct iwl_priv *priv = pci_get_drvdata(pdev);
4183         unsigned long flags;
4184
4185         if (!priv)
4186                 return;
4187
4188         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4189
4190         iwl_dbgfs_unregister(priv);
4191
4192         set_bit(STATUS_EXIT_PENDING, &priv->status);
4193
4194         if (priv->mac80211_registered) {
4195                 ieee80211_unregister_hw(priv->hw);
4196                 priv->mac80211_registered = 0;
4197         } else {
4198                 iwl3945_down(priv);
4199         }
4200
4201         /*
4202          * Make sure device is reset to low power before unloading driver.
4203          * This may be redundant with iwl_down(), but there are paths to
4204          * run iwl_down() without calling apm_ops.stop(), and there are
4205          * paths to avoid running iwl_down() at all before leaving driver.
4206          * This (inexpensive) call *makes sure* device is reset.
4207          */
4208         priv->cfg->ops->lib->apm_ops.stop(priv);
4209
4210         /* make sure we flush any pending irq or
4211          * tasklet for the driver
4212          */
4213         spin_lock_irqsave(&priv->lock, flags);
4214         iwl_disable_interrupts(priv);
4215         spin_unlock_irqrestore(&priv->lock, flags);
4216
4217         iwl_synchronize_irq(priv);
4218
4219         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4220
4221         cancel_delayed_work_sync(&priv->rfkill_poll);
4222
4223         iwl3945_dealloc_ucode_pci(priv);
4224
4225         if (priv->rxq.bd)
4226                 iwl3945_rx_queue_free(priv, &priv->rxq);
4227         iwl3945_hw_txq_ctx_free(priv);
4228
4229         iwl3945_unset_hw_params(priv);
4230         iwl_clear_stations_table(priv);
4231
4232         /*netif_stop_queue(dev); */
4233         flush_workqueue(priv->workqueue);
4234
4235         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4236          * priv->workqueue... so we can't take down the workqueue
4237          * until now... */
4238         destroy_workqueue(priv->workqueue);
4239         priv->workqueue = NULL;
4240         iwl_free_traffic_mem(priv);
4241
4242         free_irq(pdev->irq, priv);
4243         pci_disable_msi(pdev);
4244
4245         pci_iounmap(pdev, priv->hw_base);
4246         pci_release_regions(pdev);
4247         pci_disable_device(pdev);
4248         pci_set_drvdata(pdev, NULL);
4249
4250         iwl_free_channel_map(priv);
4251         iwlcore_free_geos(priv);
4252         kfree(priv->scan);
4253         if (priv->ibss_beacon)
4254                 dev_kfree_skb(priv->ibss_beacon);
4255
4256         ieee80211_free_hw(priv->hw);
4257 }
4258
4259
4260 /*****************************************************************************
4261  *
4262  * driver and module entry point
4263  *
4264  *****************************************************************************/
4265
4266 static struct pci_driver iwl3945_driver = {
4267         .name = DRV_NAME,
4268         .id_table = iwl3945_hw_card_ids,
4269         .probe = iwl3945_pci_probe,
4270         .remove = __devexit_p(iwl3945_pci_remove),
4271 #ifdef CONFIG_PM
4272         .suspend = iwl_pci_suspend,
4273         .resume = iwl_pci_resume,
4274 #endif
4275 };
4276
4277 static int __init iwl3945_init(void)
4278 {
4279
4280         int ret;
4281         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4282         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4283
4284         ret = iwl3945_rate_control_register();
4285         if (ret) {
4286                 printk(KERN_ERR DRV_NAME
4287                        "Unable to register rate control algorithm: %d\n", ret);
4288                 return ret;
4289         }
4290
4291         ret = pci_register_driver(&iwl3945_driver);
4292         if (ret) {
4293                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4294                 goto error_register;
4295         }
4296
4297         return ret;
4298
4299 error_register:
4300         iwl3945_rate_control_unregister();
4301         return ret;
4302 }
4303
4304 static void __exit iwl3945_exit(void)
4305 {
4306         pci_unregister_driver(&iwl3945_driver);
4307         iwl3945_rate_control_unregister();
4308 }
4309
4310 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4311
4312 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4313 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4314 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4315 MODULE_PARM_DESC(swcrypto,
4316                  "using software crypto (default 1 [software])\n");
4317 #ifdef CONFIG_IWLWIFI_DEBUG
4318 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4319 MODULE_PARM_DESC(debug, "debug output mask");
4320 #endif
4321 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4322                    int, S_IRUGO);
4323 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4324 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4325 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4326
4327 module_exit(iwl3945_exit);
4328 module_init(iwl3945_init);