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         iwl_free_pages(priv, cmd.reply_page);
 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                         __iwl_free_pages(priv, rxq->pool[i].page);
1202                         rxq->pool[i].page = NULL;
1203                 }
1204                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1205         }
1206
1207         /* Set us so that we have processed and used all buffers, but have
1208          * not restocked the Rx queue with fresh buffers */
1209         rxq->read = rxq->write = 0;
1210         rxq->write_actual = 0;
1211         rxq->free_count = 0;
1212         spin_unlock_irqrestore(&rxq->lock, flags);
1213 }
1214
1215 void iwl3945_rx_replenish(void *data)
1216 {
1217         struct iwl_priv *priv = data;
1218         unsigned long flags;
1219
1220         iwl3945_rx_allocate(priv, GFP_KERNEL);
1221
1222         spin_lock_irqsave(&priv->lock, flags);
1223         iwl3945_rx_queue_restock(priv);
1224         spin_unlock_irqrestore(&priv->lock, flags);
1225 }
1226
1227 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1228 {
1229         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1230
1231         iwl3945_rx_queue_restock(priv);
1232 }
1233
1234
1235 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1236  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1237  * This free routine walks the list of POOL entries and if SKB is set to
1238  * non NULL it is unmapped and freed
1239  */
1240 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1241 {
1242         int i;
1243         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1244                 if (rxq->pool[i].page != NULL) {
1245                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1246                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1247                                 PCI_DMA_FROMDEVICE);
1248                         __iwl_free_pages(priv, rxq->pool[i].page);
1249                         rxq->pool[i].page = NULL;
1250                 }
1251         }
1252
1253         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1254                             rxq->dma_addr);
1255         pci_free_consistent(priv->pci_dev, sizeof(struct iwl_rb_status),
1256                             rxq->rb_stts, rxq->rb_stts_dma);
1257         rxq->bd = NULL;
1258         rxq->rb_stts  = NULL;
1259 }
1260
1261
1262 /* Convert linear signal-to-noise ratio into dB */
1263 static u8 ratio2dB[100] = {
1264 /*       0   1   2   3   4   5   6   7   8   9 */
1265          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1266         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1267         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1268         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1269         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1270         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1271         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1272         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1273         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1274         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1275 };
1276
1277 /* Calculates a relative dB value from a ratio of linear
1278  *   (i.e. not dB) signal levels.
1279  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1280 int iwl3945_calc_db_from_ratio(int sig_ratio)
1281 {
1282         /* 1000:1 or higher just report as 60 dB */
1283         if (sig_ratio >= 1000)
1284                 return 60;
1285
1286         /* 100:1 or higher, divide by 10 and use table,
1287          *   add 20 dB to make up for divide by 10 */
1288         if (sig_ratio >= 100)
1289                 return 20 + (int)ratio2dB[sig_ratio/10];
1290
1291         /* We shouldn't see this */
1292         if (sig_ratio < 1)
1293                 return 0;
1294
1295         /* Use table for ratios 1:1 - 99:1 */
1296         return (int)ratio2dB[sig_ratio];
1297 }
1298
1299 #define PERFECT_RSSI (-20) /* dBm */
1300 #define WORST_RSSI (-95)   /* dBm */
1301 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
1302
1303 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
1304  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
1305  *   about formulas used below. */
1306 int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
1307 {
1308         int sig_qual;
1309         int degradation = PERFECT_RSSI - rssi_dbm;
1310
1311         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
1312          * as indicator; formula is (signal dbm - noise dbm).
1313          * SNR at or above 40 is a great signal (100%).
1314          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
1315          * Weakest usable signal is usually 10 - 15 dB SNR. */
1316         if (noise_dbm) {
1317                 if (rssi_dbm - noise_dbm >= 40)
1318                         return 100;
1319                 else if (rssi_dbm < noise_dbm)
1320                         return 0;
1321                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
1322
1323         /* Else use just the signal level.
1324          * This formula is a least squares fit of data points collected and
1325          *   compared with a reference system that had a percentage (%) display
1326          *   for signal quality. */
1327         } else
1328                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
1329                             (15 * RSSI_RANGE + 62 * degradation)) /
1330                            (RSSI_RANGE * RSSI_RANGE);
1331
1332         if (sig_qual > 100)
1333                 sig_qual = 100;
1334         else if (sig_qual < 1)
1335                 sig_qual = 0;
1336
1337         return sig_qual;
1338 }
1339
1340 /**
1341  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1342  *
1343  * Uses the priv->rx_handlers callback function array to invoke
1344  * the appropriate handlers, including command responses,
1345  * frame-received notifications, and other notifications.
1346  */
1347 static void iwl3945_rx_handle(struct iwl_priv *priv)
1348 {
1349         struct iwl_rx_mem_buffer *rxb;
1350         struct iwl_rx_packet *pkt;
1351         struct iwl_rx_queue *rxq = &priv->rxq;
1352         u32 r, i;
1353         int reclaim;
1354         unsigned long flags;
1355         u8 fill_rx = 0;
1356         u32 count = 8;
1357         int total_empty = 0;
1358
1359         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1360          * buffer that the driver may process (last buffer filled by ucode). */
1361         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1362         i = rxq->read;
1363
1364         /* calculate total frames need to be restock after handling RX */
1365         total_empty = r - rxq->write_actual;
1366         if (total_empty < 0)
1367                 total_empty += RX_QUEUE_SIZE;
1368
1369         if (total_empty > (RX_QUEUE_SIZE / 2))
1370                 fill_rx = 1;
1371         /* Rx interrupt, but nothing sent from uCode */
1372         if (i == r)
1373                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1374
1375         while (i != r) {
1376                 rxb = rxq->queue[i];
1377
1378                 /* If an RXB doesn't have a Rx queue slot associated with it,
1379                  * then a bug has been introduced in the queue refilling
1380                  * routines -- catch it here */
1381                 BUG_ON(rxb == NULL);
1382
1383                 rxq->queue[i] = NULL;
1384
1385                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1386                                PAGE_SIZE << priv->hw_params.rx_page_order,
1387                                PCI_DMA_FROMDEVICE);
1388                 pkt = rxb_addr(rxb);
1389
1390                 trace_iwlwifi_dev_rx(priv, pkt,
1391                         le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
1392
1393                 /* Reclaim a command buffer only if this packet is a response
1394                  *   to a (driver-originated) command.
1395                  * If the packet (e.g. Rx frame) originated from uCode,
1396                  *   there is no command buffer to reclaim.
1397                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1398                  *   but apparently a few don't get set; catch them here. */
1399                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1400                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1401                         (pkt->hdr.cmd != REPLY_TX);
1402
1403                 /* Based on type of command response or notification,
1404                  *   handle those that need handling via function in
1405                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1406                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1407                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1408                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1409                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1410                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1411                 } else {
1412                         /* No handling needed */
1413                         IWL_DEBUG_RX(priv,
1414                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1415                                 r, i, get_cmd_string(pkt->hdr.cmd),
1416                                 pkt->hdr.cmd);
1417                 }
1418
1419                 /*
1420                  * XXX: After here, we should always check rxb->page
1421                  * against NULL before touching it or its virtual
1422                  * memory (pkt). Because some rx_handler might have
1423                  * already taken or freed the pages.
1424                  */
1425
1426                 if (reclaim) {
1427                         /* Invoke any callbacks, transfer the buffer to caller,
1428                          * and fire off the (possibly) blocking iwl_send_cmd()
1429                          * as we reclaim the driver command queue */
1430                         if (rxb->page)
1431                                 iwl_tx_cmd_complete(priv, rxb);
1432                         else
1433                                 IWL_WARN(priv, "Claim null rxb?\n");
1434                 }
1435
1436                 /* Reuse the page if possible. For notification packets and
1437                  * SKBs that fail to Rx correctly, add them back into the
1438                  * rx_free list for reuse later. */
1439                 spin_lock_irqsave(&rxq->lock, flags);
1440                 if (rxb->page != NULL) {
1441                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1442                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1443                                 PCI_DMA_FROMDEVICE);
1444                         list_add_tail(&rxb->list, &rxq->rx_free);
1445                         rxq->free_count++;
1446                 } else
1447                         list_add_tail(&rxb->list, &rxq->rx_used);
1448
1449                 spin_unlock_irqrestore(&rxq->lock, flags);
1450
1451                 i = (i + 1) & RX_QUEUE_MASK;
1452                 /* If there are a lot of unused frames,
1453                  * restock the Rx queue so ucode won't assert. */
1454                 if (fill_rx) {
1455                         count++;
1456                         if (count >= 8) {
1457                                 rxq->read = i;
1458                                 iwl3945_rx_replenish_now(priv);
1459                                 count = 0;
1460                         }
1461                 }
1462         }
1463
1464         /* Backtrack one entry */
1465         rxq->read = i;
1466         if (fill_rx)
1467                 iwl3945_rx_replenish_now(priv);
1468         else
1469                 iwl3945_rx_queue_restock(priv);
1470 }
1471
1472 /* call this function to flush any scheduled tasklet */
1473 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1474 {
1475         /* wait to make sure we flush pending tasklet*/
1476         synchronize_irq(priv->pci_dev->irq);
1477         tasklet_kill(&priv->irq_tasklet);
1478 }
1479
1480 static const char *desc_lookup(int i)
1481 {
1482         switch (i) {
1483         case 1:
1484                 return "FAIL";
1485         case 2:
1486                 return "BAD_PARAM";
1487         case 3:
1488                 return "BAD_CHECKSUM";
1489         case 4:
1490                 return "NMI_INTERRUPT";
1491         case 5:
1492                 return "SYSASSERT";
1493         case 6:
1494                 return "FATAL_ERROR";
1495         }
1496
1497         return "UNKNOWN";
1498 }
1499
1500 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1501 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1502
1503 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1504 {
1505         u32 i;
1506         u32 desc, time, count, base, data1;
1507         u32 blink1, blink2, ilink1, ilink2;
1508
1509         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1510
1511         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1512                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1513                 return;
1514         }
1515
1516
1517         count = iwl_read_targ_mem(priv, base);
1518
1519         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1520                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1521                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1522                         priv->status, count);
1523         }
1524
1525         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1526                   "ilink1  nmiPC   Line\n");
1527         for (i = ERROR_START_OFFSET;
1528              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1529              i += ERROR_ELEM_SIZE) {
1530                 desc = iwl_read_targ_mem(priv, base + i);
1531                 time =
1532                     iwl_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1533                 blink1 =
1534                     iwl_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1535                 blink2 =
1536                     iwl_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1537                 ilink1 =
1538                     iwl_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1539                 ilink2 =
1540                     iwl_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1541                 data1 =
1542                     iwl_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1543
1544                 IWL_ERR(priv,
1545                         "%-13s (#%d) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1546                         desc_lookup(desc), desc, time, blink1, blink2,
1547                         ilink1, ilink2, data1);
1548                 trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, 0,
1549                                         0, blink1, blink2, ilink1, ilink2);
1550         }
1551 }
1552
1553 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1554
1555 /**
1556  * iwl3945_print_event_log - Dump error event log to syslog
1557  *
1558  */
1559 static void iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1560                                 u32 num_events, u32 mode)
1561 {
1562         u32 i;
1563         u32 base;       /* SRAM byte address of event log header */
1564         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1565         u32 ptr;        /* SRAM byte address of log data */
1566         u32 ev, time, data; /* event log data */
1567         unsigned long reg_flags;
1568
1569         if (num_events == 0)
1570                 return;
1571
1572         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1573
1574         if (mode == 0)
1575                 event_size = 2 * sizeof(u32);
1576         else
1577                 event_size = 3 * sizeof(u32);
1578
1579         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1580
1581         /* Make sure device is powered up for SRAM reads */
1582         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1583         iwl_grab_nic_access(priv);
1584
1585         /* Set starting address; reads will auto-increment */
1586         _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1587         rmb();
1588
1589         /* "time" is actually "data" for mode 0 (no timestamp).
1590          * place event id # at far right for easier visual parsing. */
1591         for (i = 0; i < num_events; i++) {
1592                 ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1593                 time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1594                 if (mode == 0) {
1595                         /* data, ev */
1596                         IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1597                         trace_iwlwifi_dev_ucode_event(priv, 0, time, ev);
1598                 } else {
1599                         data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1600                         IWL_ERR(priv, "%010u\t0x%08x\t%04u\n", time, data, ev);
1601                         trace_iwlwifi_dev_ucode_event(priv, time, data, ev);
1602                 }
1603         }
1604
1605         /* Allow device to power down */
1606         iwl_release_nic_access(priv);
1607         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1608 }
1609
1610 /**
1611  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1612  */
1613 static void iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1614                                       u32 num_wraps, u32 next_entry,
1615                                       u32 size, u32 mode)
1616 {
1617         /*
1618          * display the newest DEFAULT_LOG_ENTRIES entries
1619          * i.e the entries just before the next ont that uCode would fill.
1620          */
1621         if (num_wraps) {
1622                 if (next_entry < size) {
1623                         iwl3945_print_event_log(priv,
1624                                         capacity - (size - next_entry),
1625                                         size - next_entry, mode);
1626                         iwl3945_print_event_log(priv, 0,
1627                                     next_entry, mode);
1628                 } else
1629                         iwl3945_print_event_log(priv, next_entry - size,
1630                                     size, mode);
1631         } else {
1632                 if (next_entry < size)
1633                         iwl3945_print_event_log(priv, 0, next_entry, mode);
1634                 else
1635                         iwl3945_print_event_log(priv, next_entry - size,
1636                                             size, mode);
1637         }
1638 }
1639
1640 /* For sanity check only.  Actual size is determined by uCode, typ. 512 */
1641 #define IWL3945_MAX_EVENT_LOG_SIZE (512)
1642
1643 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1644
1645 void iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log)
1646 {
1647         u32 base;       /* SRAM byte address of event log header */
1648         u32 capacity;   /* event log capacity in # entries */
1649         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1650         u32 num_wraps;  /* # times uCode wrapped to top of log */
1651         u32 next_entry; /* index of next entry to be written by uCode */
1652         u32 size;       /* # entries that we'll print */
1653
1654         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1655         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1656                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1657                 return;
1658         }
1659
1660         /* event log header */
1661         capacity = iwl_read_targ_mem(priv, base);
1662         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1663         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1664         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1665
1666         if (capacity > IWL3945_MAX_EVENT_LOG_SIZE) {
1667                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1668                         capacity, IWL3945_MAX_EVENT_LOG_SIZE);
1669                 capacity = IWL3945_MAX_EVENT_LOG_SIZE;
1670         }
1671
1672         if (next_entry > IWL3945_MAX_EVENT_LOG_SIZE) {
1673                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1674                         next_entry, IWL3945_MAX_EVENT_LOG_SIZE);
1675                 next_entry = IWL3945_MAX_EVENT_LOG_SIZE;
1676         }
1677
1678         size = num_wraps ? capacity : next_entry;
1679
1680         /* bail out if nothing in log */
1681         if (size == 0) {
1682                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1683                 return;
1684         }
1685
1686 #ifdef CONFIG_IWLWIFI_DEBUG
1687         if (!(iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1688                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1689                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1690 #else
1691         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1692                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1693 #endif
1694
1695         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1696                   size);
1697
1698 #ifdef CONFIG_IWLWIFI_DEBUG
1699         if ((iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1700                 /* if uCode has wrapped back to top of log,
1701                  * start at the oldest entry,
1702                  * i.e the next one that uCode would fill.
1703                  */
1704                 if (num_wraps)
1705                         iwl3945_print_event_log(priv, next_entry,
1706                                     capacity - next_entry, mode);
1707
1708                 /* (then/else) start at top of log */
1709                 iwl3945_print_event_log(priv, 0, next_entry, mode);
1710         } else
1711                 iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1712                                         next_entry, size, mode);
1713 #else
1714         iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1715                                 next_entry, size, mode);
1716 #endif
1717
1718 }
1719
1720 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1721 {
1722         u32 inta, handled = 0;
1723         u32 inta_fh;
1724         unsigned long flags;
1725 #ifdef CONFIG_IWLWIFI_DEBUG
1726         u32 inta_mask;
1727 #endif
1728
1729         spin_lock_irqsave(&priv->lock, flags);
1730
1731         /* Ack/clear/reset pending uCode interrupts.
1732          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1733          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1734         inta = iwl_read32(priv, CSR_INT);
1735         iwl_write32(priv, CSR_INT, inta);
1736
1737         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1738          * Any new interrupts that happen after this, either while we're
1739          * in this tasklet, or later, will show up in next ISR/tasklet. */
1740         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1741         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1742
1743 #ifdef CONFIG_IWLWIFI_DEBUG
1744         if (iwl_get_debug_level(priv) & IWL_DL_ISR) {
1745                 /* just for debug */
1746                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1747                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1748                               inta, inta_mask, inta_fh);
1749         }
1750 #endif
1751
1752         spin_unlock_irqrestore(&priv->lock, flags);
1753
1754         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1755          * atomic, make sure that inta covers all the interrupts that
1756          * we've discovered, even if FH interrupt came in just after
1757          * reading CSR_INT. */
1758         if (inta_fh & CSR39_FH_INT_RX_MASK)
1759                 inta |= CSR_INT_BIT_FH_RX;
1760         if (inta_fh & CSR39_FH_INT_TX_MASK)
1761                 inta |= CSR_INT_BIT_FH_TX;
1762
1763         /* Now service all interrupt bits discovered above. */
1764         if (inta & CSR_INT_BIT_HW_ERR) {
1765                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1766
1767                 /* Tell the device to stop sending interrupts */
1768                 iwl_disable_interrupts(priv);
1769
1770                 priv->isr_stats.hw++;
1771                 iwl_irq_handle_error(priv);
1772
1773                 handled |= CSR_INT_BIT_HW_ERR;
1774
1775                 return;
1776         }
1777
1778 #ifdef CONFIG_IWLWIFI_DEBUG
1779         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1780                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1781                 if (inta & CSR_INT_BIT_SCD) {
1782                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1783                                       "the frame/frames.\n");
1784                         priv->isr_stats.sch++;
1785                 }
1786
1787                 /* Alive notification via Rx interrupt will do the real work */
1788                 if (inta & CSR_INT_BIT_ALIVE) {
1789                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1790                         priv->isr_stats.alive++;
1791                 }
1792         }
1793 #endif
1794         /* Safely ignore these bits for debug checks below */
1795         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1796
1797         /* Error detected by uCode */
1798         if (inta & CSR_INT_BIT_SW_ERR) {
1799                 IWL_ERR(priv, "Microcode SW error detected. "
1800                         "Restarting 0x%X.\n", inta);
1801                 priv->isr_stats.sw++;
1802                 priv->isr_stats.sw_err = inta;
1803                 iwl_irq_handle_error(priv);
1804                 handled |= CSR_INT_BIT_SW_ERR;
1805         }
1806
1807         /* uCode wakes up after power-down sleep */
1808         if (inta & CSR_INT_BIT_WAKEUP) {
1809                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1810                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1811                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1812                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1813                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1814                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1815                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1816                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1817
1818                 priv->isr_stats.wakeup++;
1819                 handled |= CSR_INT_BIT_WAKEUP;
1820         }
1821
1822         /* All uCode command responses, including Tx command responses,
1823          * Rx "responses" (frame-received notification), and other
1824          * notifications from uCode come through here*/
1825         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1826                 iwl3945_rx_handle(priv);
1827                 priv->isr_stats.rx++;
1828                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1829         }
1830
1831         if (inta & CSR_INT_BIT_FH_TX) {
1832                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1833                 priv->isr_stats.tx++;
1834
1835                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1836                 iwl_write_direct32(priv, FH39_TCSR_CREDIT
1837                                         (FH39_SRVC_CHNL), 0x0);
1838                 handled |= CSR_INT_BIT_FH_TX;
1839         }
1840
1841         if (inta & ~handled) {
1842                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1843                 priv->isr_stats.unhandled++;
1844         }
1845
1846         if (inta & ~priv->inta_mask) {
1847                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1848                          inta & ~priv->inta_mask);
1849                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1850         }
1851
1852         /* Re-enable all interrupts */
1853         /* only Re-enable if disabled by irq */
1854         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1855                 iwl_enable_interrupts(priv);
1856
1857 #ifdef CONFIG_IWLWIFI_DEBUG
1858         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1859                 inta = iwl_read32(priv, CSR_INT);
1860                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1861                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1862                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1863                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1864         }
1865 #endif
1866 }
1867
1868 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1869                                          enum ieee80211_band band,
1870                                      u8 is_active, u8 n_probes,
1871                                      struct iwl3945_scan_channel *scan_ch)
1872 {
1873         struct ieee80211_channel *chan;
1874         const struct ieee80211_supported_band *sband;
1875         const struct iwl_channel_info *ch_info;
1876         u16 passive_dwell = 0;
1877         u16 active_dwell = 0;
1878         int added, i;
1879
1880         sband = iwl_get_hw_mode(priv, band);
1881         if (!sband)
1882                 return 0;
1883
1884         active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
1885         passive_dwell = iwl_get_passive_dwell_time(priv, band);
1886
1887         if (passive_dwell <= active_dwell)
1888                 passive_dwell = active_dwell + 1;
1889
1890         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1891                 chan = priv->scan_request->channels[i];
1892
1893                 if (chan->band != band)
1894                         continue;
1895
1896                 scan_ch->channel = chan->hw_value;
1897
1898                 ch_info = iwl_get_channel_info(priv, band, scan_ch->channel);
1899                 if (!is_channel_valid(ch_info)) {
1900                         IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
1901                                        scan_ch->channel);
1902                         continue;
1903                 }
1904
1905                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1906                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1907                 /* If passive , set up for auto-switch
1908                  *  and use long active_dwell time.
1909                  */
1910                 if (!is_active || is_channel_passive(ch_info) ||
1911                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1912                         scan_ch->type = 0;      /* passive */
1913                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1914                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1915                 } else {
1916                         scan_ch->type = 1;      /* active */
1917                 }
1918
1919                 /* Set direct probe bits. These may be used both for active
1920                  * scan channels (probes gets sent right away),
1921                  * or for passive channels (probes get se sent only after
1922                  * hearing clear Rx packet).*/
1923                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1924                         if (n_probes)
1925                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1926                 } else {
1927                         /* uCode v1 does not allow setting direct probe bits on
1928                          * passive channel. */
1929                         if ((scan_ch->type & 1) && n_probes)
1930                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1931                 }
1932
1933                 /* Set txpower levels to defaults */
1934                 scan_ch->tpc.dsp_atten = 110;
1935                 /* scan_pwr_info->tpc.dsp_atten; */
1936
1937                 /*scan_pwr_info->tpc.tx_gain; */
1938                 if (band == IEEE80211_BAND_5GHZ)
1939                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1940                 else {
1941                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1942                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1943                          * power level:
1944                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1945                          */
1946                 }
1947
1948                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1949                                scan_ch->channel,
1950                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1951                                (scan_ch->type & 1) ?
1952                                active_dwell : passive_dwell);
1953
1954                 scan_ch++;
1955                 added++;
1956         }
1957
1958         IWL_DEBUG_SCAN(priv, "total channels to scan %d \n", added);
1959         return added;
1960 }
1961
1962 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1963                               struct ieee80211_rate *rates)
1964 {
1965         int i;
1966
1967         for (i = 0; i < IWL_RATE_COUNT; i++) {
1968                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1969                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1970                 rates[i].hw_value_short = i;
1971                 rates[i].flags = 0;
1972                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1973                         /*
1974                          * If CCK != 1M then set short preamble rate flag.
1975                          */
1976                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1977                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1978                 }
1979         }
1980 }
1981
1982 /******************************************************************************
1983  *
1984  * uCode download functions
1985  *
1986  ******************************************************************************/
1987
1988 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1989 {
1990         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1991         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1992         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1993         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1994         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1995         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1996 }
1997
1998 /**
1999  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
2000  *     looking at all data.
2001  */
2002 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
2003 {
2004         u32 val;
2005         u32 save_len = len;
2006         int rc = 0;
2007         u32 errcnt;
2008
2009         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2010
2011         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2012                                IWL39_RTC_INST_LOWER_BOUND);
2013
2014         errcnt = 0;
2015         for (; len > 0; len -= sizeof(u32), image++) {
2016                 /* read data comes through single port, auto-incr addr */
2017                 /* NOTE: Use the debugless read so we don't flood kernel log
2018                  * if IWL_DL_IO is set */
2019                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2020                 if (val != le32_to_cpu(*image)) {
2021                         IWL_ERR(priv, "uCode INST section is invalid at "
2022                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2023                                   save_len - len, val, le32_to_cpu(*image));
2024                         rc = -EIO;
2025                         errcnt++;
2026                         if (errcnt >= 20)
2027                                 break;
2028                 }
2029         }
2030
2031
2032         if (!errcnt)
2033                 IWL_DEBUG_INFO(priv,
2034                         "ucode image in INSTRUCTION memory is good\n");
2035
2036         return rc;
2037 }
2038
2039
2040 /**
2041  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
2042  *   using sample data 100 bytes apart.  If these sample points are good,
2043  *   it's a pretty good bet that everything between them is good, too.
2044  */
2045 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2046 {
2047         u32 val;
2048         int rc = 0;
2049         u32 errcnt = 0;
2050         u32 i;
2051
2052         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2053
2054         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2055                 /* read data comes through single port, auto-incr addr */
2056                 /* NOTE: Use the debugless read so we don't flood kernel log
2057                  * if IWL_DL_IO is set */
2058                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2059                         i + IWL39_RTC_INST_LOWER_BOUND);
2060                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2061                 if (val != le32_to_cpu(*image)) {
2062 #if 0 /* Enable this if you want to see details */
2063                         IWL_ERR(priv, "uCode INST section is invalid at "
2064                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2065                                   i, val, *image);
2066 #endif
2067                         rc = -EIO;
2068                         errcnt++;
2069                         if (errcnt >= 3)
2070                                 break;
2071                 }
2072         }
2073
2074         return rc;
2075 }
2076
2077
2078 /**
2079  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2080  *    and verify its contents
2081  */
2082 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2083 {
2084         __le32 *image;
2085         u32 len;
2086         int rc = 0;
2087
2088         /* Try bootstrap */
2089         image = (__le32 *)priv->ucode_boot.v_addr;
2090         len = priv->ucode_boot.len;
2091         rc = iwl3945_verify_inst_sparse(priv, image, len);
2092         if (rc == 0) {
2093                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2094                 return 0;
2095         }
2096
2097         /* Try initialize */
2098         image = (__le32 *)priv->ucode_init.v_addr;
2099         len = priv->ucode_init.len;
2100         rc = iwl3945_verify_inst_sparse(priv, image, len);
2101         if (rc == 0) {
2102                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2103                 return 0;
2104         }
2105
2106         /* Try runtime/protocol */
2107         image = (__le32 *)priv->ucode_code.v_addr;
2108         len = priv->ucode_code.len;
2109         rc = iwl3945_verify_inst_sparse(priv, image, len);
2110         if (rc == 0) {
2111                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2112                 return 0;
2113         }
2114
2115         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2116
2117         /* Since nothing seems to match, show first several data entries in
2118          * instruction SRAM, so maybe visual inspection will give a clue.
2119          * Selection of bootstrap image (vs. other images) is arbitrary. */
2120         image = (__le32 *)priv->ucode_boot.v_addr;
2121         len = priv->ucode_boot.len;
2122         rc = iwl3945_verify_inst_full(priv, image, len);
2123
2124         return rc;
2125 }
2126
2127 static void iwl3945_nic_start(struct iwl_priv *priv)
2128 {
2129         /* Remove all resets to allow NIC to operate */
2130         iwl_write32(priv, CSR_RESET, 0);
2131 }
2132
2133 /**
2134  * iwl3945_read_ucode - Read uCode images from disk file.
2135  *
2136  * Copy into buffers for card to fetch via bus-mastering
2137  */
2138 static int iwl3945_read_ucode(struct iwl_priv *priv)
2139 {
2140         const struct iwl_ucode_header *ucode;
2141         int ret = -EINVAL, index;
2142         const struct firmware *ucode_raw;
2143         /* firmware file name contains uCode/driver compatibility version */
2144         const char *name_pre = priv->cfg->fw_name_pre;
2145         const unsigned int api_max = priv->cfg->ucode_api_max;
2146         const unsigned int api_min = priv->cfg->ucode_api_min;
2147         char buf[25];
2148         u8 *src;
2149         size_t len;
2150         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2151
2152         /* Ask kernel firmware_class module to get the boot firmware off disk.
2153          * request_firmware() is synchronous, file is in memory on return. */
2154         for (index = api_max; index >= api_min; index--) {
2155                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2156                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2157                 if (ret < 0) {
2158                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2159                                   buf, ret);
2160                         if (ret == -ENOENT)
2161                                 continue;
2162                         else
2163                                 goto error;
2164                 } else {
2165                         if (index < api_max)
2166                                 IWL_ERR(priv, "Loaded firmware %s, "
2167                                         "which is deprecated. "
2168                                         " Please use API v%u instead.\n",
2169                                           buf, api_max);
2170                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2171                                        "(%zd bytes) from disk\n",
2172                                        buf, ucode_raw->size);
2173                         break;
2174                 }
2175         }
2176
2177         if (ret < 0)
2178                 goto error;
2179
2180         /* Make sure that we got at least our header! */
2181         if (ucode_raw->size <  priv->cfg->ops->ucode->get_header_size(1)) {
2182                 IWL_ERR(priv, "File size way too small!\n");
2183                 ret = -EINVAL;
2184                 goto err_release;
2185         }
2186
2187         /* Data from ucode file:  header followed by uCode images */
2188         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2189
2190         priv->ucode_ver = le32_to_cpu(ucode->ver);
2191         api_ver = IWL_UCODE_API(priv->ucode_ver);
2192         inst_size = priv->cfg->ops->ucode->get_inst_size(ucode, api_ver);
2193         data_size = priv->cfg->ops->ucode->get_data_size(ucode, api_ver);
2194         init_size = priv->cfg->ops->ucode->get_init_size(ucode, api_ver);
2195         init_data_size =
2196                 priv->cfg->ops->ucode->get_init_data_size(ucode, api_ver);
2197         boot_size = priv->cfg->ops->ucode->get_boot_size(ucode, api_ver);
2198         src = priv->cfg->ops->ucode->get_data(ucode, api_ver);
2199
2200         /* api_ver should match the api version forming part of the
2201          * firmware filename ... but we don't check for that and only rely
2202          * on the API version read from firmware header from here on forward */
2203
2204         if (api_ver < api_min || api_ver > api_max) {
2205                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2206                           "Driver supports v%u, firmware is v%u.\n",
2207                           api_max, api_ver);
2208                 priv->ucode_ver = 0;
2209                 ret = -EINVAL;
2210                 goto err_release;
2211         }
2212         if (api_ver != api_max)
2213                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2214                           "got %u. New firmware can be obtained "
2215                           "from http://www.intellinuxwireless.org.\n",
2216                           api_max, api_ver);
2217
2218         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2219                 IWL_UCODE_MAJOR(priv->ucode_ver),
2220                 IWL_UCODE_MINOR(priv->ucode_ver),
2221                 IWL_UCODE_API(priv->ucode_ver),
2222                 IWL_UCODE_SERIAL(priv->ucode_ver));
2223
2224         snprintf(priv->hw->wiphy->fw_version,
2225                  sizeof(priv->hw->wiphy->fw_version),
2226                  "%u.%u.%u.%u",
2227                  IWL_UCODE_MAJOR(priv->ucode_ver),
2228                  IWL_UCODE_MINOR(priv->ucode_ver),
2229                  IWL_UCODE_API(priv->ucode_ver),
2230                  IWL_UCODE_SERIAL(priv->ucode_ver));
2231
2232         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2233                        priv->ucode_ver);
2234         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2235                        inst_size);
2236         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2237                        data_size);
2238         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2239                        init_size);
2240         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2241                        init_data_size);
2242         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2243                        boot_size);
2244
2245
2246         /* Verify size of file vs. image size info in file's header */
2247         if (ucode_raw->size != priv->cfg->ops->ucode->get_header_size(api_ver) +
2248                 inst_size + data_size + init_size +
2249                 init_data_size + boot_size) {
2250
2251                 IWL_DEBUG_INFO(priv,
2252                         "uCode file size %zd does not match expected size\n",
2253                         ucode_raw->size);
2254                 ret = -EINVAL;
2255                 goto err_release;
2256         }
2257
2258         /* Verify that uCode images will fit in card's SRAM */
2259         if (inst_size > IWL39_MAX_INST_SIZE) {
2260                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2261                                inst_size);
2262                 ret = -EINVAL;
2263                 goto err_release;
2264         }
2265
2266         if (data_size > IWL39_MAX_DATA_SIZE) {
2267                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2268                                data_size);
2269                 ret = -EINVAL;
2270                 goto err_release;
2271         }
2272         if (init_size > IWL39_MAX_INST_SIZE) {
2273                 IWL_DEBUG_INFO(priv,
2274                                 "uCode init instr len %d too large to fit in\n",
2275                                 init_size);
2276                 ret = -EINVAL;
2277                 goto err_release;
2278         }
2279         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2280                 IWL_DEBUG_INFO(priv,
2281                                 "uCode init data len %d too large to fit in\n",
2282                                 init_data_size);
2283                 ret = -EINVAL;
2284                 goto err_release;
2285         }
2286         if (boot_size > IWL39_MAX_BSM_SIZE) {
2287                 IWL_DEBUG_INFO(priv,
2288                                 "uCode boot instr len %d too large to fit in\n",
2289                                 boot_size);
2290                 ret = -EINVAL;
2291                 goto err_release;
2292         }
2293
2294         /* Allocate ucode buffers for card's bus-master loading ... */
2295
2296         /* Runtime instructions and 2 copies of data:
2297          * 1) unmodified from disk
2298          * 2) backup cache for save/restore during power-downs */
2299         priv->ucode_code.len = inst_size;
2300         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2301
2302         priv->ucode_data.len = data_size;
2303         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2304
2305         priv->ucode_data_backup.len = data_size;
2306         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2307
2308         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2309             !priv->ucode_data_backup.v_addr)
2310                 goto err_pci_alloc;
2311
2312         /* Initialization instructions and data */
2313         if (init_size && init_data_size) {
2314                 priv->ucode_init.len = init_size;
2315                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2316
2317                 priv->ucode_init_data.len = init_data_size;
2318                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2319
2320                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2321                         goto err_pci_alloc;
2322         }
2323
2324         /* Bootstrap (instructions only, no data) */
2325         if (boot_size) {
2326                 priv->ucode_boot.len = boot_size;
2327                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2328
2329                 if (!priv->ucode_boot.v_addr)
2330                         goto err_pci_alloc;
2331         }
2332
2333         /* Copy images into buffers for card's bus-master reads ... */
2334
2335         /* Runtime instructions (first block of data in file) */
2336         len = inst_size;
2337         IWL_DEBUG_INFO(priv,
2338                 "Copying (but not loading) uCode instr len %zd\n", len);
2339         memcpy(priv->ucode_code.v_addr, src, len);
2340         src += len;
2341
2342         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2343                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2344
2345         /* Runtime data (2nd block)
2346          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2347         len = data_size;
2348         IWL_DEBUG_INFO(priv,
2349                 "Copying (but not loading) uCode data len %zd\n", len);
2350         memcpy(priv->ucode_data.v_addr, src, len);
2351         memcpy(priv->ucode_data_backup.v_addr, src, len);
2352         src += len;
2353
2354         /* Initialization instructions (3rd block) */
2355         if (init_size) {
2356                 len = init_size;
2357                 IWL_DEBUG_INFO(priv,
2358                         "Copying (but not loading) init instr len %zd\n", len);
2359                 memcpy(priv->ucode_init.v_addr, src, len);
2360                 src += len;
2361         }
2362
2363         /* Initialization data (4th block) */
2364         if (init_data_size) {
2365                 len = init_data_size;
2366                 IWL_DEBUG_INFO(priv,
2367                         "Copying (but not loading) init data len %zd\n", len);
2368                 memcpy(priv->ucode_init_data.v_addr, src, len);
2369                 src += len;
2370         }
2371
2372         /* Bootstrap instructions (5th block) */
2373         len = boot_size;
2374         IWL_DEBUG_INFO(priv,
2375                 "Copying (but not loading) boot instr len %zd\n", len);
2376         memcpy(priv->ucode_boot.v_addr, src, len);
2377
2378         /* We have our copies now, allow OS release its copies */
2379         release_firmware(ucode_raw);
2380         return 0;
2381
2382  err_pci_alloc:
2383         IWL_ERR(priv, "failed to allocate pci memory\n");
2384         ret = -ENOMEM;
2385         iwl3945_dealloc_ucode_pci(priv);
2386
2387  err_release:
2388         release_firmware(ucode_raw);
2389
2390  error:
2391         return ret;
2392 }
2393
2394
2395 /**
2396  * iwl3945_set_ucode_ptrs - Set uCode address location
2397  *
2398  * Tell initialization uCode where to find runtime uCode.
2399  *
2400  * BSM registers initially contain pointers to initialization uCode.
2401  * We need to replace them to load runtime uCode inst and data,
2402  * and to save runtime data when powering down.
2403  */
2404 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2405 {
2406         dma_addr_t pinst;
2407         dma_addr_t pdata;
2408
2409         /* bits 31:0 for 3945 */
2410         pinst = priv->ucode_code.p_addr;
2411         pdata = priv->ucode_data_backup.p_addr;
2412
2413         /* Tell bootstrap uCode where to find image to load */
2414         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2415         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2416         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2417                                  priv->ucode_data.len);
2418
2419         /* Inst byte count must be last to set up, bit 31 signals uCode
2420          *   that all new ptr/size info is in place */
2421         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2422                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2423
2424         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2425
2426         return 0;
2427 }
2428
2429 /**
2430  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2431  *
2432  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2433  *
2434  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2435  */
2436 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2437 {
2438         /* Check alive response for "valid" sign from uCode */
2439         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2440                 /* We had an error bringing up the hardware, so take it
2441                  * all the way back down so we can try again */
2442                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2443                 goto restart;
2444         }
2445
2446         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2447          * This is a paranoid check, because we would not have gotten the
2448          * "initialize" alive if code weren't properly loaded.  */
2449         if (iwl3945_verify_ucode(priv)) {
2450                 /* Runtime instruction load was bad;
2451                  * take it all the way back down so we can try again */
2452                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2453                 goto restart;
2454         }
2455
2456         /* Send pointers to protocol/runtime uCode image ... init code will
2457          * load and launch runtime uCode, which will send us another "Alive"
2458          * notification. */
2459         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2460         if (iwl3945_set_ucode_ptrs(priv)) {
2461                 /* Runtime instruction load won't happen;
2462                  * take it all the way back down so we can try again */
2463                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2464                 goto restart;
2465         }
2466         return;
2467
2468  restart:
2469         queue_work(priv->workqueue, &priv->restart);
2470 }
2471
2472 /**
2473  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2474  *                   from protocol/runtime uCode (initialization uCode's
2475  *                   Alive gets handled by iwl3945_init_alive_start()).
2476  */
2477 static void iwl3945_alive_start(struct iwl_priv *priv)
2478 {
2479         int thermal_spin = 0;
2480         u32 rfkill;
2481
2482         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2483
2484         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2485                 /* We had an error bringing up the hardware, so take it
2486                  * all the way back down so we can try again */
2487                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2488                 goto restart;
2489         }
2490
2491         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2492          * This is a paranoid check, because we would not have gotten the
2493          * "runtime" alive if code weren't properly loaded.  */
2494         if (iwl3945_verify_ucode(priv)) {
2495                 /* Runtime instruction load was bad;
2496                  * take it all the way back down so we can try again */
2497                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2498                 goto restart;
2499         }
2500
2501         iwl_clear_stations_table(priv);
2502
2503         rfkill = iwl_read_prph(priv, APMG_RFKILL_REG);
2504         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2505
2506         if (rfkill & 0x1) {
2507                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2508                 /* if RFKILL is not on, then wait for thermal
2509                  * sensor in adapter to kick in */
2510                 while (iwl3945_hw_get_temperature(priv) == 0) {
2511                         thermal_spin++;
2512                         udelay(10);
2513                 }
2514
2515                 if (thermal_spin)
2516                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2517                                        thermal_spin * 10);
2518         } else
2519                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2520
2521         /* After the ALIVE response, we can send commands to 3945 uCode */
2522         set_bit(STATUS_ALIVE, &priv->status);
2523
2524         if (iwl_is_rfkill(priv))
2525                 return;
2526
2527         ieee80211_wake_queues(priv->hw);
2528
2529         priv->active_rate = priv->rates_mask;
2530         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2531
2532         iwl_power_update_mode(priv, true);
2533
2534         if (iwl_is_associated(priv)) {
2535                 struct iwl3945_rxon_cmd *active_rxon =
2536                                 (struct iwl3945_rxon_cmd *)(&priv->active_rxon);
2537
2538                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2539                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2540         } else {
2541                 /* Initialize our rx_config data */
2542                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2543         }
2544
2545         /* Configure Bluetooth device coexistence support */
2546         iwl_send_bt_config(priv);
2547
2548         /* Configure the adapter for unassociated operation */
2549         iwlcore_commit_rxon(priv);
2550
2551         iwl3945_reg_txpower_periodic(priv);
2552
2553         iwl_leds_init(priv);
2554
2555         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2556         set_bit(STATUS_READY, &priv->status);
2557         wake_up_interruptible(&priv->wait_command_queue);
2558
2559         /* reassociate for ADHOC mode */
2560         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
2561                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
2562                                                                 priv->vif);
2563                 if (beacon)
2564                         iwl_mac_beacon_update(priv->hw, beacon);
2565         }
2566
2567         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2568                 iwl_set_mode(priv, priv->iw_mode);
2569
2570         return;
2571
2572  restart:
2573         queue_work(priv->workqueue, &priv->restart);
2574 }
2575
2576 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2577
2578 static void __iwl3945_down(struct iwl_priv *priv)
2579 {
2580         unsigned long flags;
2581         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2582         struct ieee80211_conf *conf = NULL;
2583
2584         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2585
2586         conf = ieee80211_get_hw_conf(priv->hw);
2587
2588         if (!exit_pending)
2589                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2590
2591         iwl_clear_stations_table(priv);
2592
2593         /* Unblock any waiting calls */
2594         wake_up_interruptible_all(&priv->wait_command_queue);
2595
2596         /* Wipe out the EXIT_PENDING status bit if we are not actually
2597          * exiting the module */
2598         if (!exit_pending)
2599                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2600
2601         /* stop and reset the on-board processor */
2602         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2603
2604         /* tell the device to stop sending interrupts */
2605         spin_lock_irqsave(&priv->lock, flags);
2606         iwl_disable_interrupts(priv);
2607         spin_unlock_irqrestore(&priv->lock, flags);
2608         iwl_synchronize_irq(priv);
2609
2610         if (priv->mac80211_registered)
2611                 ieee80211_stop_queues(priv->hw);
2612
2613         /* If we have not previously called iwl3945_init() then
2614          * clear all bits but the RF Kill bits and return */
2615         if (!iwl_is_init(priv)) {
2616                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2617                                         STATUS_RF_KILL_HW |
2618                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2619                                         STATUS_GEO_CONFIGURED |
2620                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2621                                         STATUS_EXIT_PENDING;
2622                 goto exit;
2623         }
2624
2625         /* ...otherwise clear out all the status bits but the RF Kill
2626          * bit and continue taking the NIC down. */
2627         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2628                                 STATUS_RF_KILL_HW |
2629                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2630                                 STATUS_GEO_CONFIGURED |
2631                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2632                                 STATUS_FW_ERROR |
2633                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2634                                 STATUS_EXIT_PENDING;
2635
2636         iwl3945_hw_txq_ctx_stop(priv);
2637         iwl3945_hw_rxq_stop(priv);
2638
2639         /* Power-down device's busmaster DMA clocks */
2640         iwl_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2641         udelay(5);
2642
2643         /* Stop the device, and put it in low power state */
2644         priv->cfg->ops->lib->apm_ops.stop(priv);
2645
2646  exit:
2647         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2648
2649         if (priv->ibss_beacon)
2650                 dev_kfree_skb(priv->ibss_beacon);
2651         priv->ibss_beacon = NULL;
2652
2653         /* clear out any free frames */
2654         iwl3945_clear_free_frames(priv);
2655 }
2656
2657 static void iwl3945_down(struct iwl_priv *priv)
2658 {
2659         mutex_lock(&priv->mutex);
2660         __iwl3945_down(priv);
2661         mutex_unlock(&priv->mutex);
2662
2663         iwl3945_cancel_deferred_work(priv);
2664 }
2665
2666 #define MAX_HW_RESTARTS 5
2667
2668 static int __iwl3945_up(struct iwl_priv *priv)
2669 {
2670         int rc, i;
2671
2672         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2673                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2674                 return -EIO;
2675         }
2676
2677         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2678                 IWL_ERR(priv, "ucode not available for device bring up\n");
2679                 return -EIO;
2680         }
2681
2682         /* If platform's RF_KILL switch is NOT set to KILL */
2683         if (iwl_read32(priv, CSR_GP_CNTRL) &
2684                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2685                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2686         else {
2687                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2688                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2689                 return -ENODEV;
2690         }
2691
2692         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2693
2694         rc = iwl3945_hw_nic_init(priv);
2695         if (rc) {
2696                 IWL_ERR(priv, "Unable to int nic\n");
2697                 return rc;
2698         }
2699
2700         /* make sure rfkill handshake bits are cleared */
2701         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2702         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2703                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2704
2705         /* clear (again), then enable host interrupts */
2706         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2707         iwl_enable_interrupts(priv);
2708
2709         /* really make sure rfkill handshake bits are cleared */
2710         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2711         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2712
2713         /* Copy original ucode data image from disk into backup cache.
2714          * This will be used to initialize the on-board processor's
2715          * data SRAM for a clean start when the runtime program first loads. */
2716         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2717                priv->ucode_data.len);
2718
2719         /* We return success when we resume from suspend and rf_kill is on. */
2720         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2721                 return 0;
2722
2723         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2724
2725                 iwl_clear_stations_table(priv);
2726
2727                 /* load bootstrap state machine,
2728                  * load bootstrap program into processor's memory,
2729                  * prepare to load the "initialize" uCode */
2730                 priv->cfg->ops->lib->load_ucode(priv);
2731
2732                 if (rc) {
2733                         IWL_ERR(priv,
2734                                 "Unable to set up bootstrap uCode: %d\n", rc);
2735                         continue;
2736                 }
2737
2738                 /* start card; "initialize" will load runtime ucode */
2739                 iwl3945_nic_start(priv);
2740
2741                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2742
2743                 return 0;
2744         }
2745
2746         set_bit(STATUS_EXIT_PENDING, &priv->status);
2747         __iwl3945_down(priv);
2748         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2749
2750         /* tried to restart and config the device for as long as our
2751          * patience could withstand */
2752         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2753         return -EIO;
2754 }
2755
2756
2757 /*****************************************************************************
2758  *
2759  * Workqueue callbacks
2760  *
2761  *****************************************************************************/
2762
2763 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2764 {
2765         struct iwl_priv *priv =
2766             container_of(data, struct iwl_priv, init_alive_start.work);
2767
2768         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2769                 return;
2770
2771         mutex_lock(&priv->mutex);
2772         iwl3945_init_alive_start(priv);
2773         mutex_unlock(&priv->mutex);
2774 }
2775
2776 static void iwl3945_bg_alive_start(struct work_struct *data)
2777 {
2778         struct iwl_priv *priv =
2779             container_of(data, struct iwl_priv, alive_start.work);
2780
2781         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2782                 return;
2783
2784         mutex_lock(&priv->mutex);
2785         iwl3945_alive_start(priv);
2786         mutex_unlock(&priv->mutex);
2787 }
2788
2789 /*
2790  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2791  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2792  * *is* readable even when device has been SW_RESET into low power mode
2793  * (e.g. during RF KILL).
2794  */
2795 static void iwl3945_rfkill_poll(struct work_struct *data)
2796 {
2797         struct iwl_priv *priv =
2798             container_of(data, struct iwl_priv, rfkill_poll.work);
2799         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2800         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2801                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2802
2803         if (new_rfkill != old_rfkill) {
2804                 if (new_rfkill)
2805                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2806                 else
2807                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2808
2809                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2810
2811                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2812                                 new_rfkill ? "disable radio" : "enable radio");
2813         }
2814
2815         /* Keep this running, even if radio now enabled.  This will be
2816          * cancelled in mac_start() if system decides to start again */
2817         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
2818                            round_jiffies_relative(2 * HZ));
2819
2820 }
2821
2822 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
2823 static void iwl3945_bg_request_scan(struct work_struct *data)
2824 {
2825         struct iwl_priv *priv =
2826             container_of(data, struct iwl_priv, request_scan);
2827         struct iwl_host_cmd cmd = {
2828                 .id = REPLY_SCAN_CMD,
2829                 .len = sizeof(struct iwl3945_scan_cmd),
2830                 .flags = CMD_SIZE_HUGE,
2831         };
2832         int rc = 0;
2833         struct iwl3945_scan_cmd *scan;
2834         struct ieee80211_conf *conf = NULL;
2835         u8 n_probes = 0;
2836         enum ieee80211_band band;
2837         bool is_active = false;
2838
2839         conf = ieee80211_get_hw_conf(priv->hw);
2840
2841         mutex_lock(&priv->mutex);
2842
2843         cancel_delayed_work(&priv->scan_check);
2844
2845         if (!iwl_is_ready(priv)) {
2846                 IWL_WARN(priv, "request scan called when driver not ready.\n");
2847                 goto done;
2848         }
2849
2850         /* Make sure the scan wasn't canceled before this queued work
2851          * was given the chance to run... */
2852         if (!test_bit(STATUS_SCANNING, &priv->status))
2853                 goto done;
2854
2855         /* This should never be called or scheduled if there is currently
2856          * a scan active in the hardware. */
2857         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
2858                 IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests  "
2859                                 "Ignoring second request.\n");
2860                 rc = -EIO;
2861                 goto done;
2862         }
2863
2864         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2865                 IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
2866                 goto done;
2867         }
2868
2869         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2870                 IWL_DEBUG_HC(priv,
2871                         "Scan request while abort pending. Queuing.\n");
2872                 goto done;
2873         }
2874
2875         if (iwl_is_rfkill(priv)) {
2876                 IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
2877                 goto done;
2878         }
2879
2880         if (!test_bit(STATUS_READY, &priv->status)) {
2881                 IWL_DEBUG_HC(priv,
2882                         "Scan request while uninitialized. Queuing.\n");
2883                 goto done;
2884         }
2885
2886         if (!priv->scan_bands) {
2887                 IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
2888                 goto done;
2889         }
2890
2891         if (!priv->scan) {
2892                 priv->scan = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2893                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2894                 if (!priv->scan) {
2895                         rc = -ENOMEM;
2896                         goto done;
2897                 }
2898         }
2899         scan = priv->scan;
2900         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2901
2902         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2903         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2904
2905         if (iwl_is_associated(priv)) {
2906                 u16 interval = 0;
2907                 u32 extra;
2908                 u32 suspend_time = 100;
2909                 u32 scan_suspend_time = 100;
2910                 unsigned long flags;
2911
2912                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2913
2914                 spin_lock_irqsave(&priv->lock, flags);
2915                 interval = priv->beacon_int;
2916                 spin_unlock_irqrestore(&priv->lock, flags);
2917
2918                 scan->suspend_time = 0;
2919                 scan->max_out_time = cpu_to_le32(200 * 1024);
2920                 if (!interval)
2921                         interval = suspend_time;
2922                 /*
2923                  * suspend time format:
2924                  *  0-19: beacon interval in usec (time before exec.)
2925                  * 20-23: 0
2926                  * 24-31: number of beacons (suspend between channels)
2927                  */
2928
2929                 extra = (suspend_time / interval) << 24;
2930                 scan_suspend_time = 0xFF0FFFFF &
2931                     (extra | ((suspend_time % interval) * 1024));
2932
2933                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2934                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2935                                scan_suspend_time, interval);
2936         }
2937
2938         if (priv->scan_request->n_ssids) {
2939                 int i, p = 0;
2940                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2941                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2942                         /* always does wildcard anyway */
2943                         if (!priv->scan_request->ssids[i].ssid_len)
2944                                 continue;
2945                         scan->direct_scan[p].id = WLAN_EID_SSID;
2946                         scan->direct_scan[p].len =
2947                                 priv->scan_request->ssids[i].ssid_len;
2948                         memcpy(scan->direct_scan[p].ssid,
2949                                priv->scan_request->ssids[i].ssid,
2950                                priv->scan_request->ssids[i].ssid_len);
2951                         n_probes++;
2952                         p++;
2953                 }
2954                 is_active = true;
2955         } else
2956                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2957
2958         /* We don't build a direct scan probe request; the uCode will do
2959          * that based on the direct_mask added to each channel entry */
2960         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2961         scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
2962         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2963
2964         /* flags + rate selection */
2965
2966         if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
2967                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2968                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2969                 scan->good_CRC_th = 0;
2970                 band = IEEE80211_BAND_2GHZ;
2971         } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
2972                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2973                 /*
2974                  * If active scaning is requested but a certain channel
2975                  * is marked passive, we can do active scanning if we
2976                  * detect transmissions.
2977                  */
2978                 scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0;
2979                 band = IEEE80211_BAND_5GHZ;
2980         } else {
2981                 IWL_WARN(priv, "Invalid scan band count\n");
2982                 goto done;
2983         }
2984
2985         scan->tx_cmd.len = cpu_to_le16(
2986                         iwl_fill_probe_req(priv,
2987                                 (struct ieee80211_mgmt *)scan->data,
2988                                 priv->scan_request->ie,
2989                                 priv->scan_request->ie_len,
2990                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2991
2992         /* select Rx antennas */
2993         scan->flags |= iwl3945_get_antenna_flags(priv);
2994
2995         if (iwl_is_monitor_mode(priv))
2996                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
2997
2998         scan->channel_count =
2999                 iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
3000                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
3001
3002         if (scan->channel_count == 0) {
3003                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
3004                 goto done;
3005         }
3006
3007         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
3008             scan->channel_count * sizeof(struct iwl3945_scan_channel);
3009         cmd.data = scan;
3010         scan->len = cpu_to_le16(cmd.len);
3011
3012         set_bit(STATUS_SCAN_HW, &priv->status);
3013         rc = iwl_send_cmd_sync(priv, &cmd);
3014         if (rc)
3015                 goto done;
3016
3017         queue_delayed_work(priv->workqueue, &priv->scan_check,
3018                            IWL_SCAN_CHECK_WATCHDOG);
3019
3020         mutex_unlock(&priv->mutex);
3021         return;
3022
3023  done:
3024         /* can not perform scan make sure we clear scanning
3025          * bits from status so next scan request can be performed.
3026          * if we dont clear scanning status bit here all next scan
3027          * will fail
3028         */
3029         clear_bit(STATUS_SCAN_HW, &priv->status);
3030         clear_bit(STATUS_SCANNING, &priv->status);
3031
3032         /* inform mac80211 scan aborted */
3033         queue_work(priv->workqueue, &priv->scan_completed);
3034         mutex_unlock(&priv->mutex);
3035 }
3036
3037 static void iwl3945_bg_up(struct work_struct *data)
3038 {
3039         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
3040
3041         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3042                 return;
3043
3044         mutex_lock(&priv->mutex);
3045         __iwl3945_up(priv);
3046         mutex_unlock(&priv->mutex);
3047 }
3048
3049 static void iwl3945_bg_restart(struct work_struct *data)
3050 {
3051         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
3052
3053         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3054                 return;
3055
3056         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
3057                 mutex_lock(&priv->mutex);
3058                 priv->vif = NULL;
3059                 priv->is_open = 0;
3060                 mutex_unlock(&priv->mutex);
3061                 iwl3945_down(priv);
3062                 ieee80211_restart_hw(priv->hw);
3063         } else {
3064                 iwl3945_down(priv);
3065                 queue_work(priv->workqueue, &priv->up);
3066         }
3067 }
3068
3069 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3070 {
3071         struct iwl_priv *priv =
3072             container_of(data, struct iwl_priv, rx_replenish);
3073
3074         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3075                 return;
3076
3077         mutex_lock(&priv->mutex);
3078         iwl3945_rx_replenish(priv);
3079         mutex_unlock(&priv->mutex);
3080 }
3081
3082 #define IWL_DELAY_NEXT_SCAN (HZ*2)
3083
3084 void iwl3945_post_associate(struct iwl_priv *priv)
3085 {
3086         int rc = 0;
3087         struct ieee80211_conf *conf = NULL;
3088
3089         if (priv->iw_mode == NL80211_IFTYPE_AP) {
3090                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
3091                 return;
3092         }
3093
3094
3095         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3096                         priv->assoc_id, priv->active_rxon.bssid_addr);
3097
3098         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3099                 return;
3100
3101         if (!priv->vif || !priv->is_open)
3102                 return;
3103
3104         iwl_scan_cancel_timeout(priv, 200);
3105
3106         conf = ieee80211_get_hw_conf(priv->hw);
3107
3108         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3109         iwlcore_commit_rxon(priv);
3110
3111         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3112         iwl_setup_rxon_timing(priv);
3113         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3114                               sizeof(priv->rxon_timing), &priv->rxon_timing);
3115         if (rc)
3116                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3117                             "Attempting to continue.\n");
3118
3119         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3120
3121         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3122
3123         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3124                         priv->assoc_id, priv->beacon_int);
3125
3126         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3127                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3128         else
3129                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3130
3131         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3132                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
3133                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
3134                 else
3135                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3136
3137                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3138                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3139
3140         }
3141
3142         iwlcore_commit_rxon(priv);
3143
3144         switch (priv->iw_mode) {
3145         case NL80211_IFTYPE_STATION:
3146                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3147                 break;
3148
3149         case NL80211_IFTYPE_ADHOC:
3150
3151                 priv->assoc_id = 1;
3152                 iwl_add_station(priv, priv->bssid, 0, CMD_SYNC, NULL);
3153                 iwl3945_sync_sta(priv, IWL_STA_ID,
3154                                  (priv->band == IEEE80211_BAND_5GHZ) ?
3155                                  IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP,
3156                                  CMD_ASYNC);
3157                 iwl3945_rate_scale_init(priv->hw, IWL_STA_ID);
3158                 iwl3945_send_beacon_cmd(priv);
3159
3160                 break;
3161
3162         default:
3163                  IWL_ERR(priv, "%s Should not be called in %d mode\n",
3164                            __func__, priv->iw_mode);
3165                 break;
3166         }
3167
3168         iwl_activate_qos(priv, 0);
3169
3170         /* we have just associated, don't start scan too early */
3171         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
3172 }
3173
3174 /*****************************************************************************
3175  *
3176  * mac80211 entry point functions
3177  *
3178  *****************************************************************************/
3179
3180 #define UCODE_READY_TIMEOUT     (2 * HZ)
3181
3182 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3183 {
3184         struct iwl_priv *priv = hw->priv;
3185         int ret;
3186
3187         IWL_DEBUG_MAC80211(priv, "enter\n");
3188
3189         /* we should be verifying the device is ready to be opened */
3190         mutex_lock(&priv->mutex);
3191
3192         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3193          * ucode filename and max sizes are card-specific. */
3194
3195         if (!priv->ucode_code.len) {
3196                 ret = iwl3945_read_ucode(priv);
3197                 if (ret) {
3198                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3199                         mutex_unlock(&priv->mutex);
3200                         goto out_release_irq;
3201                 }
3202         }
3203
3204         ret = __iwl3945_up(priv);
3205
3206         mutex_unlock(&priv->mutex);
3207
3208         if (ret)
3209                 goto out_release_irq;
3210
3211         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3212
3213         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3214          * mac80211 will not be run successfully. */
3215         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3216                         test_bit(STATUS_READY, &priv->status),
3217                         UCODE_READY_TIMEOUT);
3218         if (!ret) {
3219                 if (!test_bit(STATUS_READY, &priv->status)) {
3220                         IWL_ERR(priv,
3221                                 "Wait for START_ALIVE timeout after %dms.\n",
3222                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3223                         ret = -ETIMEDOUT;
3224                         goto out_release_irq;
3225                 }
3226         }
3227
3228         /* ucode is running and will send rfkill notifications,
3229          * no need to poll the killswitch state anymore */
3230         cancel_delayed_work(&priv->rfkill_poll);
3231
3232         iwl_led_start(priv);
3233
3234         priv->is_open = 1;
3235         IWL_DEBUG_MAC80211(priv, "leave\n");
3236         return 0;
3237
3238 out_release_irq:
3239         priv->is_open = 0;
3240         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3241         return ret;
3242 }
3243
3244 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3245 {
3246         struct iwl_priv *priv = hw->priv;
3247
3248         IWL_DEBUG_MAC80211(priv, "enter\n");
3249
3250         if (!priv->is_open) {
3251                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3252                 return;
3253         }
3254
3255         priv->is_open = 0;
3256
3257         if (iwl_is_ready_rf(priv)) {
3258                 /* stop mac, cancel any scan request and clear
3259                  * RXON_FILTER_ASSOC_MSK BIT
3260                  */
3261                 mutex_lock(&priv->mutex);
3262                 iwl_scan_cancel_timeout(priv, 100);
3263                 mutex_unlock(&priv->mutex);
3264         }
3265
3266         iwl3945_down(priv);
3267
3268         flush_workqueue(priv->workqueue);
3269
3270         /* start polling the killswitch state again */
3271         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
3272                            round_jiffies_relative(2 * HZ));
3273
3274         IWL_DEBUG_MAC80211(priv, "leave\n");
3275 }
3276
3277 static int iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3278 {
3279         struct iwl_priv *priv = hw->priv;
3280
3281         IWL_DEBUG_MAC80211(priv, "enter\n");
3282
3283         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3284                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3285
3286         if (iwl3945_tx_skb(priv, skb))
3287                 dev_kfree_skb_any(skb);
3288
3289         IWL_DEBUG_MAC80211(priv, "leave\n");
3290         return NETDEV_TX_OK;
3291 }
3292
3293 void iwl3945_config_ap(struct iwl_priv *priv)
3294 {
3295         int rc = 0;
3296
3297         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3298                 return;
3299
3300         /* The following should be done only at AP bring up */
3301         if (!(iwl_is_associated(priv))) {
3302
3303                 /* RXON - unassoc (to set timing command) */
3304                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3305                 iwlcore_commit_rxon(priv);
3306
3307                 /* RXON Timing */
3308                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
3309                 iwl_setup_rxon_timing(priv);
3310                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
3311                                       sizeof(priv->rxon_timing),
3312                                       &priv->rxon_timing);
3313                 if (rc)
3314                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3315                                         "Attempting to continue.\n");
3316
3317                 /* FIXME: what should be the assoc_id for AP? */
3318                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
3319                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
3320                         priv->staging_rxon.flags |=
3321                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3322                 else
3323                         priv->staging_rxon.flags &=
3324                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3325
3326                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
3327                         if (priv->assoc_capability &
3328                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
3329                                 priv->staging_rxon.flags |=
3330                                         RXON_FLG_SHORT_SLOT_MSK;
3331                         else
3332                                 priv->staging_rxon.flags &=
3333                                         ~RXON_FLG_SHORT_SLOT_MSK;
3334
3335                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
3336                                 priv->staging_rxon.flags &=
3337                                         ~RXON_FLG_SHORT_SLOT_MSK;
3338                 }
3339                 /* restore RXON assoc */
3340                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
3341                 iwlcore_commit_rxon(priv);
3342                 iwl_add_station(priv, iwl_bcast_addr, 0, CMD_SYNC, NULL);
3343         }
3344         iwl3945_send_beacon_cmd(priv);
3345
3346         /* FIXME - we need to add code here to detect a totally new
3347          * configuration, reset the AP, unassoc, rxon timing, assoc,
3348          * clear sta table, add BCAST sta... */
3349 }
3350
3351 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3352                                struct ieee80211_vif *vif,
3353                                struct ieee80211_sta *sta,
3354                                struct ieee80211_key_conf *key)
3355 {
3356         struct iwl_priv *priv = hw->priv;
3357         const u8 *addr;
3358         int ret = 0;
3359         u8 sta_id = IWL_INVALID_STATION;
3360         u8 static_key;
3361
3362         IWL_DEBUG_MAC80211(priv, "enter\n");
3363
3364         if (iwl3945_mod_params.sw_crypto) {
3365                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3366                 return -EOPNOTSUPP;
3367         }
3368
3369         addr = sta ? sta->addr : iwl_bcast_addr;
3370         static_key = !iwl_is_associated(priv);
3371
3372         if (!static_key) {
3373                 sta_id = iwl_find_station(priv, addr);
3374                 if (sta_id == IWL_INVALID_STATION) {
3375                         IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
3376                                             addr);
3377                         return -EINVAL;
3378                 }
3379         }
3380
3381         mutex_lock(&priv->mutex);
3382         iwl_scan_cancel_timeout(priv, 100);
3383         mutex_unlock(&priv->mutex);
3384
3385         switch (cmd) {
3386         case SET_KEY:
3387                 if (static_key)
3388                         ret = iwl3945_set_static_key(priv, key);
3389                 else
3390                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3391                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3392                 break;
3393         case DISABLE_KEY:
3394                 if (static_key)
3395                         ret = iwl3945_remove_static_key(priv);
3396                 else
3397                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3398                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3399                 break;
3400         default:
3401                 ret = -EINVAL;
3402         }
3403
3404         IWL_DEBUG_MAC80211(priv, "leave\n");
3405
3406         return ret;
3407 }
3408
3409 /*****************************************************************************
3410  *
3411  * sysfs attributes
3412  *
3413  *****************************************************************************/
3414
3415 #ifdef CONFIG_IWLWIFI_DEBUG
3416
3417 /*
3418  * The following adds a new attribute to the sysfs representation
3419  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3420  * used for controlling the debug level.
3421  *
3422  * See the level definitions in iwl for details.
3423  *
3424  * The debug_level being managed using sysfs below is a per device debug
3425  * level that is used instead of the global debug level if it (the per
3426  * device debug level) is set.
3427  */
3428 static ssize_t show_debug_level(struct device *d,
3429                                 struct device_attribute *attr, char *buf)
3430 {
3431         struct iwl_priv *priv = dev_get_drvdata(d);
3432         return sprintf(buf, "0x%08X\n", iwl_get_debug_level(priv));
3433 }
3434 static ssize_t store_debug_level(struct device *d,
3435                                 struct device_attribute *attr,
3436                                  const char *buf, size_t count)
3437 {
3438         struct iwl_priv *priv = dev_get_drvdata(d);
3439         unsigned long val;
3440         int ret;
3441
3442         ret = strict_strtoul(buf, 0, &val);
3443         if (ret)
3444                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3445         else {
3446                 priv->debug_level = val;
3447                 if (iwl_alloc_traffic_mem(priv))
3448                         IWL_ERR(priv,
3449                                 "Not enough memory to generate traffic log\n");
3450         }
3451         return strnlen(buf, count);
3452 }
3453
3454 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3455                         show_debug_level, store_debug_level);
3456
3457 #endif /* CONFIG_IWLWIFI_DEBUG */
3458
3459 static ssize_t show_temperature(struct device *d,
3460                                 struct device_attribute *attr, char *buf)
3461 {
3462         struct iwl_priv *priv = dev_get_drvdata(d);
3463
3464         if (!iwl_is_alive(priv))
3465                 return -EAGAIN;
3466
3467         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3468 }
3469
3470 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3471
3472 static ssize_t show_tx_power(struct device *d,
3473                              struct device_attribute *attr, char *buf)
3474 {
3475         struct iwl_priv *priv = dev_get_drvdata(d);
3476         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3477 }
3478
3479 static ssize_t store_tx_power(struct device *d,
3480                               struct device_attribute *attr,
3481                               const char *buf, size_t count)
3482 {
3483         struct iwl_priv *priv = dev_get_drvdata(d);
3484         char *p = (char *)buf;
3485         u32 val;
3486
3487         val = simple_strtoul(p, &p, 10);
3488         if (p == buf)
3489                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3490         else
3491                 iwl3945_hw_reg_set_txpower(priv, val);
3492
3493         return count;
3494 }
3495
3496 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3497
3498 static ssize_t show_flags(struct device *d,
3499                           struct device_attribute *attr, char *buf)
3500 {
3501         struct iwl_priv *priv = dev_get_drvdata(d);
3502
3503         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3504 }
3505
3506 static ssize_t store_flags(struct device *d,
3507                            struct device_attribute *attr,
3508                            const char *buf, size_t count)
3509 {
3510         struct iwl_priv *priv = dev_get_drvdata(d);
3511         u32 flags = simple_strtoul(buf, NULL, 0);
3512
3513         mutex_lock(&priv->mutex);
3514         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3515                 /* Cancel any currently running scans... */
3516                 if (iwl_scan_cancel_timeout(priv, 100))
3517                         IWL_WARN(priv, "Could not cancel scan.\n");
3518                 else {
3519                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3520                                        flags);
3521                         priv->staging_rxon.flags = cpu_to_le32(flags);
3522                         iwlcore_commit_rxon(priv);
3523                 }
3524         }
3525         mutex_unlock(&priv->mutex);
3526
3527         return count;
3528 }
3529
3530 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3531
3532 static ssize_t show_filter_flags(struct device *d,
3533                                  struct device_attribute *attr, char *buf)
3534 {
3535         struct iwl_priv *priv = dev_get_drvdata(d);
3536
3537         return sprintf(buf, "0x%04X\n",
3538                 le32_to_cpu(priv->active_rxon.filter_flags));
3539 }
3540
3541 static ssize_t store_filter_flags(struct device *d,
3542                                   struct device_attribute *attr,
3543                                   const char *buf, size_t count)
3544 {
3545         struct iwl_priv *priv = dev_get_drvdata(d);
3546         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3547
3548         mutex_lock(&priv->mutex);
3549         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3550                 /* Cancel any currently running scans... */
3551                 if (iwl_scan_cancel_timeout(priv, 100))
3552                         IWL_WARN(priv, "Could not cancel scan.\n");
3553                 else {
3554                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3555                                        "0x%04X\n", filter_flags);
3556                         priv->staging_rxon.filter_flags =
3557                                 cpu_to_le32(filter_flags);
3558                         iwlcore_commit_rxon(priv);
3559                 }
3560         }
3561         mutex_unlock(&priv->mutex);
3562
3563         return count;
3564 }
3565
3566 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3567                    store_filter_flags);
3568
3569 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3570
3571 static ssize_t show_measurement(struct device *d,
3572                                 struct device_attribute *attr, char *buf)
3573 {
3574         struct iwl_priv *priv = dev_get_drvdata(d);
3575         struct iwl_spectrum_notification measure_report;
3576         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3577         u8 *data = (u8 *)&measure_report;
3578         unsigned long flags;
3579
3580         spin_lock_irqsave(&priv->lock, flags);
3581         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3582                 spin_unlock_irqrestore(&priv->lock, flags);
3583                 return 0;
3584         }
3585         memcpy(&measure_report, &priv->measure_report, size);
3586         priv->measurement_status = 0;
3587         spin_unlock_irqrestore(&priv->lock, flags);
3588
3589         while (size && (PAGE_SIZE - len)) {
3590                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3591                                    PAGE_SIZE - len, 1);
3592                 len = strlen(buf);
3593                 if (PAGE_SIZE - len)
3594                         buf[len++] = '\n';
3595
3596                 ofs += 16;
3597                 size -= min(size, 16U);
3598         }
3599
3600         return len;
3601 }
3602
3603 static ssize_t store_measurement(struct device *d,
3604                                  struct device_attribute *attr,
3605                                  const char *buf, size_t count)
3606 {
3607         struct iwl_priv *priv = dev_get_drvdata(d);
3608         struct ieee80211_measurement_params params = {
3609                 .channel = le16_to_cpu(priv->active_rxon.channel),
3610                 .start_time = cpu_to_le64(priv->last_tsf),
3611                 .duration = cpu_to_le16(1),
3612         };
3613         u8 type = IWL_MEASURE_BASIC;
3614         u8 buffer[32];
3615         u8 channel;
3616
3617         if (count) {
3618                 char *p = buffer;
3619                 strncpy(buffer, buf, min(sizeof(buffer), count));
3620                 channel = simple_strtoul(p, NULL, 0);
3621                 if (channel)
3622                         params.channel = channel;
3623
3624                 p = buffer;
3625                 while (*p && *p != ' ')
3626                         p++;
3627                 if (*p)
3628                         type = simple_strtoul(p + 1, NULL, 0);
3629         }
3630
3631         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3632                        "channel %d (for '%s')\n", type, params.channel, buf);
3633         iwl3945_get_measurement(priv, &params, type);
3634
3635         return count;
3636 }
3637
3638 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3639                    show_measurement, store_measurement);
3640 #endif /* CONFIG_IWL3945_SPECTRUM_MEASUREMENT */
3641
3642 static ssize_t store_retry_rate(struct device *d,
3643                                 struct device_attribute *attr,
3644                                 const char *buf, size_t count)
3645 {
3646         struct iwl_priv *priv = dev_get_drvdata(d);
3647
3648         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3649         if (priv->retry_rate <= 0)
3650                 priv->retry_rate = 1;
3651
3652         return count;
3653 }
3654
3655 static ssize_t show_retry_rate(struct device *d,
3656                                struct device_attribute *attr, char *buf)
3657 {
3658         struct iwl_priv *priv = dev_get_drvdata(d);
3659         return sprintf(buf, "%d", priv->retry_rate);
3660 }
3661
3662 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3663                    store_retry_rate);
3664
3665
3666 static ssize_t show_channels(struct device *d,
3667                              struct device_attribute *attr, char *buf)
3668 {
3669         /* all this shit doesn't belong into sysfs anyway */
3670         return 0;
3671 }
3672
3673 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3674
3675 static ssize_t show_statistics(struct device *d,
3676                                struct device_attribute *attr, char *buf)
3677 {
3678         struct iwl_priv *priv = dev_get_drvdata(d);
3679         u32 size = sizeof(struct iwl3945_notif_statistics);
3680         u32 len = 0, ofs = 0;
3681         u8 *data = (u8 *)&priv->statistics_39;
3682         int rc = 0;
3683
3684         if (!iwl_is_alive(priv))
3685                 return -EAGAIN;
3686
3687         mutex_lock(&priv->mutex);
3688         rc = iwl_send_statistics_request(priv, CMD_SYNC, false);
3689         mutex_unlock(&priv->mutex);
3690
3691         if (rc) {
3692                 len = sprintf(buf,
3693                               "Error sending statistics request: 0x%08X\n", rc);
3694                 return len;
3695         }
3696
3697         while (size && (PAGE_SIZE - len)) {
3698                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3699                                    PAGE_SIZE - len, 1);
3700                 len = strlen(buf);
3701                 if (PAGE_SIZE - len)
3702                         buf[len++] = '\n';
3703
3704                 ofs += 16;
3705                 size -= min(size, 16U);
3706         }
3707
3708         return len;
3709 }
3710
3711 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3712
3713 static ssize_t show_antenna(struct device *d,
3714                             struct device_attribute *attr, char *buf)
3715 {
3716         struct iwl_priv *priv = dev_get_drvdata(d);
3717
3718         if (!iwl_is_alive(priv))
3719                 return -EAGAIN;
3720
3721         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3722 }
3723
3724 static ssize_t store_antenna(struct device *d,
3725                              struct device_attribute *attr,
3726                              const char *buf, size_t count)
3727 {
3728         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3729         int ant;
3730
3731         if (count == 0)
3732                 return 0;
3733
3734         if (sscanf(buf, "%1i", &ant) != 1) {
3735                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3736                 return count;
3737         }
3738
3739         if ((ant >= 0) && (ant <= 2)) {
3740                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3741                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3742         } else
3743                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3744
3745
3746         return count;
3747 }
3748
3749 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
3750
3751 static ssize_t show_status(struct device *d,
3752                            struct device_attribute *attr, char *buf)
3753 {
3754         struct iwl_priv *priv = dev_get_drvdata(d);
3755         if (!iwl_is_alive(priv))
3756                 return -EAGAIN;
3757         return sprintf(buf, "0x%08x\n", (int)priv->status);
3758 }
3759
3760 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
3761
3762 static ssize_t dump_error_log(struct device *d,
3763                               struct device_attribute *attr,
3764                               const char *buf, size_t count)
3765 {
3766         struct iwl_priv *priv = dev_get_drvdata(d);
3767         char *p = (char *)buf;
3768
3769         if (p[0] == '1')
3770                 iwl3945_dump_nic_error_log(priv);
3771
3772         return strnlen(buf, count);
3773 }
3774
3775 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
3776
3777 /*****************************************************************************
3778  *
3779  * driver setup and tear down
3780  *
3781  *****************************************************************************/
3782
3783 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3784 {
3785         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3786
3787         init_waitqueue_head(&priv->wait_command_queue);
3788
3789         INIT_WORK(&priv->up, iwl3945_bg_up);
3790         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3791         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3792         INIT_WORK(&priv->beacon_update, iwl3945_bg_beacon_update);
3793         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3794         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3795         INIT_DELAYED_WORK(&priv->rfkill_poll, iwl3945_rfkill_poll);
3796         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
3797         INIT_WORK(&priv->request_scan, iwl3945_bg_request_scan);
3798         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
3799         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
3800
3801         iwl3945_hw_setup_deferred_work(priv);
3802
3803         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3804                      iwl3945_irq_tasklet, (unsigned long)priv);
3805 }
3806
3807 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3808 {
3809         iwl3945_hw_cancel_deferred_work(priv);
3810
3811         cancel_delayed_work_sync(&priv->init_alive_start);
3812         cancel_delayed_work(&priv->scan_check);
3813         cancel_delayed_work(&priv->alive_start);
3814         cancel_work_sync(&priv->beacon_update);
3815 }
3816
3817 static struct attribute *iwl3945_sysfs_entries[] = {
3818         &dev_attr_antenna.attr,
3819         &dev_attr_channels.attr,
3820         &dev_attr_dump_errors.attr,
3821         &dev_attr_flags.attr,
3822         &dev_attr_filter_flags.attr,
3823 #ifdef CONFIG_IWL3945_SPECTRUM_MEASUREMENT
3824         &dev_attr_measurement.attr,
3825 #endif
3826         &dev_attr_retry_rate.attr,
3827         &dev_attr_statistics.attr,
3828         &dev_attr_status.attr,
3829         &dev_attr_temperature.attr,
3830         &dev_attr_tx_power.attr,
3831 #ifdef CONFIG_IWLWIFI_DEBUG
3832         &dev_attr_debug_level.attr,
3833 #endif
3834         NULL
3835 };
3836
3837 static struct attribute_group iwl3945_attribute_group = {
3838         .name = NULL,           /* put in device directory */
3839         .attrs = iwl3945_sysfs_entries,
3840 };
3841
3842 static struct ieee80211_ops iwl3945_hw_ops = {
3843         .tx = iwl3945_mac_tx,
3844         .start = iwl3945_mac_start,
3845         .stop = iwl3945_mac_stop,
3846         .add_interface = iwl_mac_add_interface,
3847         .remove_interface = iwl_mac_remove_interface,
3848         .config = iwl_mac_config,
3849         .configure_filter = iwl_configure_filter,
3850         .set_key = iwl3945_mac_set_key,
3851         .get_tx_stats = iwl_mac_get_tx_stats,
3852         .conf_tx = iwl_mac_conf_tx,
3853         .reset_tsf = iwl_mac_reset_tsf,
3854         .bss_info_changed = iwl_bss_info_changed,
3855         .hw_scan = iwl_mac_hw_scan
3856 };
3857
3858 static int iwl3945_init_drv(struct iwl_priv *priv)
3859 {
3860         int ret;
3861         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3862
3863         priv->retry_rate = 1;
3864         priv->ibss_beacon = NULL;
3865
3866         spin_lock_init(&priv->lock);
3867         spin_lock_init(&priv->sta_lock);
3868         spin_lock_init(&priv->hcmd_lock);
3869
3870         INIT_LIST_HEAD(&priv->free_frames);
3871
3872         mutex_init(&priv->mutex);
3873
3874         /* Clear the driver's (not device's) station table */
3875         iwl_clear_stations_table(priv);
3876
3877         priv->ieee_channels = NULL;
3878         priv->ieee_rates = NULL;
3879         priv->band = IEEE80211_BAND_2GHZ;
3880
3881         priv->iw_mode = NL80211_IFTYPE_STATION;
3882
3883         iwl_reset_qos(priv);
3884
3885         priv->qos_data.qos_active = 0;
3886         priv->qos_data.qos_cap.val = 0;
3887
3888         priv->rates_mask = IWL_RATES_MASK;
3889         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3890
3891         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3892                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3893                          eeprom->version);
3894                 ret = -EINVAL;
3895                 goto err;
3896         }
3897         ret = iwl_init_channel_map(priv);
3898         if (ret) {
3899                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3900                 goto err;
3901         }
3902
3903         /* Set up txpower settings in driver for all channels */
3904         if (iwl3945_txpower_set_from_eeprom(priv)) {
3905                 ret = -EIO;
3906                 goto err_free_channel_map;
3907         }
3908
3909         ret = iwlcore_init_geos(priv);
3910         if (ret) {
3911                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3912                 goto err_free_channel_map;
3913         }
3914         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3915
3916         return 0;
3917
3918 err_free_channel_map:
3919         iwl_free_channel_map(priv);
3920 err:
3921         return ret;
3922 }
3923
3924 static int iwl3945_setup_mac(struct iwl_priv *priv)
3925 {
3926         int ret;
3927         struct ieee80211_hw *hw = priv->hw;
3928
3929         hw->rate_control_algorithm = "iwl-3945-rs";
3930         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3931
3932         /* Tell mac80211 our characteristics */
3933         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3934                     IEEE80211_HW_NOISE_DBM |
3935                     IEEE80211_HW_SPECTRUM_MGMT;
3936
3937         if (!priv->cfg->broken_powersave)
3938                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
3939                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
3940
3941         hw->wiphy->interface_modes =
3942                 BIT(NL80211_IFTYPE_STATION) |
3943                 BIT(NL80211_IFTYPE_ADHOC);
3944
3945         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY |
3946                             WIPHY_FLAG_DISABLE_BEACON_HINTS;
3947
3948         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3949         /* we create the 802.11 header and a zero-length SSID element */
3950         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
3951
3952         /* Default value; 4 EDCA QOS priorities */
3953         hw->queues = 4;
3954
3955         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3956                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3957                         &priv->bands[IEEE80211_BAND_2GHZ];
3958
3959         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3960                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3961                         &priv->bands[IEEE80211_BAND_5GHZ];
3962
3963         ret = ieee80211_register_hw(priv->hw);
3964         if (ret) {
3965                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3966                 return ret;
3967         }
3968         priv->mac80211_registered = 1;
3969
3970         return 0;
3971 }
3972
3973 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3974 {
3975         int err = 0;
3976         struct iwl_priv *priv;
3977         struct ieee80211_hw *hw;
3978         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3979         struct iwl3945_eeprom *eeprom;
3980         unsigned long flags;
3981
3982         /***********************
3983          * 1. Allocating HW data
3984          * ********************/
3985
3986         /* mac80211 allocates memory for this device instance, including
3987          *   space for this driver's private structure */
3988         hw = iwl_alloc_all(cfg, &iwl3945_hw_ops);
3989         if (hw == NULL) {
3990                 printk(KERN_ERR DRV_NAME "Can not allocate network device\n");
3991                 err = -ENOMEM;
3992                 goto out;
3993         }
3994         priv = hw->priv;
3995         SET_IEEE80211_DEV(hw, &pdev->dev);
3996
3997         /*
3998          * Disabling hardware scan means that mac80211 will perform scans
3999          * "the hard way", rather than using device's scan.
4000          */
4001         if (iwl3945_mod_params.disable_hw_scan) {
4002                 IWL_DEBUG_INFO(priv, "Disabling hw_scan\n");
4003                 iwl3945_hw_ops.hw_scan = NULL;
4004         }
4005
4006
4007         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
4008         priv->cfg = cfg;
4009         priv->pci_dev = pdev;
4010         priv->inta_mask = CSR_INI_SET_MASK;
4011
4012 #ifdef CONFIG_IWLWIFI_DEBUG
4013         atomic_set(&priv->restrict_refcnt, 0);
4014 #endif
4015         if (iwl_alloc_traffic_mem(priv))
4016                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
4017
4018         /***************************
4019          * 2. Initializing PCI bus
4020          * *************************/
4021         if (pci_enable_device(pdev)) {
4022                 err = -ENODEV;
4023                 goto out_ieee80211_free_hw;
4024         }
4025
4026         pci_set_master(pdev);
4027
4028         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4029         if (!err)
4030                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4031         if (err) {
4032                 IWL_WARN(priv, "No suitable DMA available.\n");
4033                 goto out_pci_disable_device;
4034         }
4035
4036         pci_set_drvdata(pdev, priv);
4037         err = pci_request_regions(pdev, DRV_NAME);
4038         if (err)
4039                 goto out_pci_disable_device;
4040
4041         /***********************
4042          * 3. Read REV Register
4043          * ********************/
4044         priv->hw_base = pci_iomap(pdev, 0, 0);
4045         if (!priv->hw_base) {
4046                 err = -ENODEV;
4047                 goto out_pci_release_regions;
4048         }
4049
4050         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4051                         (unsigned long long) pci_resource_len(pdev, 0));
4052         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4053
4054         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4055          * PCI Tx retries from interfering with C3 CPU state */
4056         pci_write_config_byte(pdev, 0x41, 0x00);
4057
4058         /* this spin lock will be used in apm_ops.init and EEPROM access
4059          * we should init now
4060          */
4061         spin_lock_init(&priv->reg_lock);
4062
4063         /***********************
4064          * 4. Read EEPROM
4065          * ********************/
4066
4067         /* Read the EEPROM */
4068         err = iwl_eeprom_init(priv);
4069         if (err) {
4070                 IWL_ERR(priv, "Unable to init EEPROM\n");
4071                 goto out_iounmap;
4072         }
4073         /* MAC Address location in EEPROM same for 3945/4965 */
4074         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4075         memcpy(priv->mac_addr, eeprom->mac_address, ETH_ALEN);
4076         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
4077         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4078
4079         /***********************
4080          * 5. Setup HW Constants
4081          * ********************/
4082         /* Device-specific setup */
4083         if (iwl3945_hw_set_hw_params(priv)) {
4084                 IWL_ERR(priv, "failed to set hw settings\n");
4085                 goto out_eeprom_free;
4086         }
4087
4088         /***********************
4089          * 6. Setup priv
4090          * ********************/
4091
4092         err = iwl3945_init_drv(priv);
4093         if (err) {
4094                 IWL_ERR(priv, "initializing driver failed\n");
4095                 goto out_unset_hw_params;
4096         }
4097
4098         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4099                 priv->cfg->name);
4100
4101         /***********************
4102          * 7. Setup Services
4103          * ********************/
4104
4105         spin_lock_irqsave(&priv->lock, flags);
4106         iwl_disable_interrupts(priv);
4107         spin_unlock_irqrestore(&priv->lock, flags);
4108
4109         pci_enable_msi(priv->pci_dev);
4110
4111         err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
4112                           IRQF_SHARED, DRV_NAME, priv);
4113         if (err) {
4114                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4115                 goto out_disable_msi;
4116         }
4117
4118         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4119         if (err) {
4120                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4121                 goto out_release_irq;
4122         }
4123
4124         iwl_set_rxon_channel(priv,
4125                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5]);
4126         iwl3945_setup_deferred_work(priv);
4127         iwl3945_setup_rx_handlers(priv);
4128         iwl_power_initialize(priv);
4129
4130         /*********************************
4131          * 8. Setup and Register mac80211
4132          * *******************************/
4133
4134         iwl_enable_interrupts(priv);
4135
4136         err = iwl3945_setup_mac(priv);
4137         if (err)
4138                 goto  out_remove_sysfs;
4139
4140         err = iwl_dbgfs_register(priv, DRV_NAME);
4141         if (err)
4142                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4143
4144         /* Start monitoring the killswitch */
4145         queue_delayed_work(priv->workqueue, &priv->rfkill_poll,
4146                            2 * HZ);
4147
4148         return 0;
4149
4150  out_remove_sysfs:
4151         destroy_workqueue(priv->workqueue);
4152         priv->workqueue = NULL;
4153         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4154  out_release_irq:
4155         free_irq(priv->pci_dev->irq, priv);
4156  out_disable_msi:
4157         pci_disable_msi(priv->pci_dev);
4158         iwlcore_free_geos(priv);
4159         iwl_free_channel_map(priv);
4160  out_unset_hw_params:
4161         iwl3945_unset_hw_params(priv);
4162  out_eeprom_free:
4163         iwl_eeprom_free(priv);
4164  out_iounmap:
4165         pci_iounmap(pdev, priv->hw_base);
4166  out_pci_release_regions:
4167         pci_release_regions(pdev);
4168  out_pci_disable_device:
4169         pci_set_drvdata(pdev, NULL);
4170         pci_disable_device(pdev);
4171  out_ieee80211_free_hw:
4172         iwl_free_traffic_mem(priv);
4173         ieee80211_free_hw(priv->hw);
4174  out:
4175         return err;
4176 }
4177
4178 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4179 {
4180         struct iwl_priv *priv = pci_get_drvdata(pdev);
4181         unsigned long flags;
4182
4183         if (!priv)
4184                 return;
4185
4186         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4187
4188         iwl_dbgfs_unregister(priv);
4189
4190         set_bit(STATUS_EXIT_PENDING, &priv->status);
4191
4192         if (priv->mac80211_registered) {
4193                 ieee80211_unregister_hw(priv->hw);
4194                 priv->mac80211_registered = 0;
4195         } else {
4196                 iwl3945_down(priv);
4197         }
4198
4199         /*
4200          * Make sure device is reset to low power before unloading driver.
4201          * This may be redundant with iwl_down(), but there are paths to
4202          * run iwl_down() without calling apm_ops.stop(), and there are
4203          * paths to avoid running iwl_down() at all before leaving driver.
4204          * This (inexpensive) call *makes sure* device is reset.
4205          */
4206         priv->cfg->ops->lib->apm_ops.stop(priv);
4207
4208         /* make sure we flush any pending irq or
4209          * tasklet for the driver
4210          */
4211         spin_lock_irqsave(&priv->lock, flags);
4212         iwl_disable_interrupts(priv);
4213         spin_unlock_irqrestore(&priv->lock, flags);
4214
4215         iwl_synchronize_irq(priv);
4216
4217         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4218
4219         cancel_delayed_work_sync(&priv->rfkill_poll);
4220
4221         iwl3945_dealloc_ucode_pci(priv);
4222
4223         if (priv->rxq.bd)
4224                 iwl3945_rx_queue_free(priv, &priv->rxq);
4225         iwl3945_hw_txq_ctx_free(priv);
4226
4227         iwl3945_unset_hw_params(priv);
4228         iwl_clear_stations_table(priv);
4229
4230         /*netif_stop_queue(dev); */
4231         flush_workqueue(priv->workqueue);
4232
4233         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4234          * priv->workqueue... so we can't take down the workqueue
4235          * until now... */
4236         destroy_workqueue(priv->workqueue);
4237         priv->workqueue = NULL;
4238         iwl_free_traffic_mem(priv);
4239
4240         free_irq(pdev->irq, priv);
4241         pci_disable_msi(pdev);
4242
4243         pci_iounmap(pdev, priv->hw_base);
4244         pci_release_regions(pdev);
4245         pci_disable_device(pdev);
4246         pci_set_drvdata(pdev, NULL);
4247
4248         iwl_free_channel_map(priv);
4249         iwlcore_free_geos(priv);
4250         kfree(priv->scan);
4251         if (priv->ibss_beacon)
4252                 dev_kfree_skb(priv->ibss_beacon);
4253
4254         ieee80211_free_hw(priv->hw);
4255 }
4256
4257
4258 /*****************************************************************************
4259  *
4260  * driver and module entry point
4261  *
4262  *****************************************************************************/
4263
4264 static struct pci_driver iwl3945_driver = {
4265         .name = DRV_NAME,
4266         .id_table = iwl3945_hw_card_ids,
4267         .probe = iwl3945_pci_probe,
4268         .remove = __devexit_p(iwl3945_pci_remove),
4269 #ifdef CONFIG_PM
4270         .suspend = iwl_pci_suspend,
4271         .resume = iwl_pci_resume,
4272 #endif
4273 };
4274
4275 static int __init iwl3945_init(void)
4276 {
4277
4278         int ret;
4279         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4280         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4281
4282         ret = iwl3945_rate_control_register();
4283         if (ret) {
4284                 printk(KERN_ERR DRV_NAME
4285                        "Unable to register rate control algorithm: %d\n", ret);
4286                 return ret;
4287         }
4288
4289         ret = pci_register_driver(&iwl3945_driver);
4290         if (ret) {
4291                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
4292                 goto error_register;
4293         }
4294
4295         return ret;
4296
4297 error_register:
4298         iwl3945_rate_control_unregister();
4299         return ret;
4300 }
4301
4302 static void __exit iwl3945_exit(void)
4303 {
4304         pci_unregister_driver(&iwl3945_driver);
4305         iwl3945_rate_control_unregister();
4306 }
4307
4308 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4309
4310 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4311 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4312 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4313 MODULE_PARM_DESC(swcrypto,
4314                  "using software crypto (default 1 [software])\n");
4315 #ifdef CONFIG_IWLWIFI_DEBUG
4316 module_param_named(debug, iwl_debug_level, uint, S_IRUGO | S_IWUSR);
4317 MODULE_PARM_DESC(debug, "debug output mask");
4318 #endif
4319 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4320                    int, S_IRUGO);
4321 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4322 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4323 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
4324
4325 module_exit(iwl3945_exit);
4326 module_init(iwl3945_init);