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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/pci.h>
  36 #include <linux/pci-aspm.h>
  37 #include <linux/slab.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/delay.h>
  40 #include <linux/sched.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/wireless.h>
  44 #include <linux/firmware.h>
  45 #include <linux/etherdevice.h>
  46 #include <linux/if_arp.h>
  47
  48 #include <net/ieee80211_radiotap.h>
  49 #include <net/mac80211.h>
  50
  51 #include <asm/div64.h>
  52
  53 #define DRV_NAME        "iwl3945"
  54
  55 #include "iwl-fh.h"
  56 #include "iwl-3945-fh.h"
  57 #include "iwl-commands.h"
  58 #include "iwl-sta.h"
  59 #include "iwl-3945.h"
  60 #include "iwl-core.h"
  61 #include "iwl-helpers.h"
  62 #include "iwl-dev.h"
  63 #include "iwl-spectrum.h"
  64
  65 /*
  66  * module name, copyright, version, etc.
  67  */
  68
  69 #define DRV_DESCRIPTION \
  70 "Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for Linux"
  71
  72 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
  73 #define VD "d"
  74 #else
  75 #define VD
  76 #endif
  77
  78 /*
  79  * add "s" to indicate spectrum measurement included.
  80  * we add it here to be consistent with previous releases in which
  81  * this was configurable.
  82  */
  83 #define DRV_VERSION  IWLWIFI_VERSION VD "s"
  84 #define DRV_COPYRIGHT   "Copyright(c) 2003-2011 Intel Corporation"
  85 #define DRV_AUTHOR     "<ilw@linux.intel.com>"
  86
  87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  88 MODULE_VERSION(DRV_VERSION);
  89 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  90 MODULE_LICENSE("GPL");
  91
  92  /* module parameters */
  93 struct iwl_mod_params iwl3945_mod_params = {
  94         .sw_crypto = 1,
  95         .restart_fw = 1,
  96         /* the rest are 0 by default */
  97 };
  98
  99 /**
 100  * iwl3945_get_antenna_flags - Get antenna flags for RXON command
 101  * @priv: eeprom and antenna fields are used to determine antenna flags
 102  *
 103  * priv->eeprom39  is used to determine if antenna AUX/MAIN are reversed
 104  * iwl3945_mod_params.antenna specifies the antenna diversity mode:
 105  *
 106  * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
 107  * IWL_ANTENNA_MAIN      - Force MAIN antenna
 108  * IWL_ANTENNA_AUX       - Force AUX antenna
 109  */
 110 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
 111 {
 112         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
 113
 114         switch (iwl3945_mod_params.antenna) {
 115         case IWL_ANTENNA_DIVERSITY:
 116                 return 0;
 117
 118         case IWL_ANTENNA_MAIN:
 119                 if (eeprom->antenna_switch_type)
 120                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 121                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 122
 123         case IWL_ANTENNA_AUX:
 124                 if (eeprom->antenna_switch_type)
 125                         return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
 126                 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
 127         }
 128
 129         /* bad antenna selector value */
 130         IWL_ERR(priv, "Bad antenna selector value (0x%x)\n",
 131                 iwl3945_mod_params.antenna);
 132
 133         return 0;               /* "diversity" is default if error */
 134 }
 135
 136 static int iwl3945_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
 137                                    struct ieee80211_key_conf *keyconf,
 138                                    u8 sta_id)
 139 {
 140         unsigned long flags;
 141         __le16 key_flags = 0;
 142         int ret;
 143
 144         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
 145         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
 146
 147         if (sta_id == priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id)
 148                 key_flags |= STA_KEY_MULTICAST_MSK;
 149
 150         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 151         keyconf->hw_key_idx = keyconf->keyidx;
 152         key_flags &= ~STA_KEY_FLG_INVALID;
 153
 154         spin_lock_irqsave(&priv->sta_lock, flags);
 155         priv->stations[sta_id].keyinfo.cipher = keyconf->cipher;
 156         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
 157         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
 158                keyconf->keylen);
 159
 160         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
 161                keyconf->keylen);
 162
 163         if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
 164                         == STA_KEY_FLG_NO_ENC)
 165                 priv->stations[sta_id].sta.key.key_offset =
 166                                  iwl_legacy_get_free_ucode_key_index(priv);
 167         /* else, we are overriding an existing key => no need to allocated room
 168         * in uCode. */
 169
 170         WARN(priv->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
 171                 "no space for a new key");
 172
 173         priv->stations[sta_id].sta.key.key_flags = key_flags;
 174         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 175         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 176
 177         IWL_DEBUG_INFO(priv, "hwcrypto: modify ucode station key info\n");
 178
 179         ret = iwl_legacy_send_add_sta(priv,
 180                                 &priv->stations[sta_id].sta, CMD_ASYNC);
 181
 182         spin_unlock_irqrestore(&priv->sta_lock, flags);
 183
 184         return ret;
 185 }
 186
 187 static int iwl3945_set_tkip_dynamic_key_info(struct iwl_priv *priv,
 188                                   struct ieee80211_key_conf *keyconf,
 189                                   u8 sta_id)
 190 {
 191         return -EOPNOTSUPP;
 192 }
 193
 194 static int iwl3945_set_wep_dynamic_key_info(struct iwl_priv *priv,
 195                                   struct ieee80211_key_conf *keyconf,
 196                                   u8 sta_id)
 197 {
 198         return -EOPNOTSUPP;
 199 }
 200
 201 static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 202 {
 203         unsigned long flags;
 204         struct iwl_legacy_addsta_cmd sta_cmd;
 205
 206         spin_lock_irqsave(&priv->sta_lock, flags);
 207         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
 208         memset(&priv->stations[sta_id].sta.key, 0,
 209                 sizeof(struct iwl4965_keyinfo));
 210         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
 211         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
 212         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
 213         memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_legacy_addsta_cmd));
 214         spin_unlock_irqrestore(&priv->sta_lock, flags);
 215
 216         IWL_DEBUG_INFO(priv, "hwcrypto: clear ucode station key info\n");
 217         return iwl_legacy_send_add_sta(priv, &sta_cmd, CMD_SYNC);
 218 }
 219
 220 static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 221                         struct ieee80211_key_conf *keyconf, u8 sta_id)
 222 {
 223         int ret = 0;
 224
 225         keyconf->hw_key_idx = HW_KEY_DYNAMIC;
 226
 227         switch (keyconf->cipher) {
 228         case WLAN_CIPHER_SUITE_CCMP:
 229                 ret = iwl3945_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
 230                 break;
 231         case WLAN_CIPHER_SUITE_TKIP:
 232                 ret = iwl3945_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
 233                 break;
 234         case WLAN_CIPHER_SUITE_WEP40:
 235         case WLAN_CIPHER_SUITE_WEP104:
 236                 ret = iwl3945_set_wep_dynamic_key_info(priv, keyconf, sta_id);
 237                 break;
 238         default:
 239                 IWL_ERR(priv, "Unknown alg: %s alg=%x\n", __func__,
 240                         keyconf->cipher);
 241                 ret = -EINVAL;
 242         }
 243
 244         IWL_DEBUG_WEP(priv, "Set dynamic key: alg=%x len=%d idx=%d sta=%d ret=%d\n",
 245                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
 246                       sta_id, ret);
 247
 248         return ret;
 249 }
 250
 251 static int iwl3945_remove_static_key(struct iwl_priv *priv)
 252 {
 253         int ret = -EOPNOTSUPP;
 254
 255         return ret;
 256 }
 257
 258 static int iwl3945_set_static_key(struct iwl_priv *priv,
 259                                 struct ieee80211_key_conf *key)
 260 {
 261         if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 262             key->cipher == WLAN_CIPHER_SUITE_WEP104)
 263                 return -EOPNOTSUPP;
 264
 265         IWL_ERR(priv, "Static key invalid: cipher %x\n", key->cipher);
 266         return -EINVAL;
 267 }
 268
 269 static void iwl3945_clear_free_frames(struct iwl_priv *priv)
 270 {
 271         struct list_head *element;
 272
 273         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 274                        priv->frames_count);
 275
 276         while (!list_empty(&priv->free_frames)) {
 277                 element = priv->free_frames.next;
 278                 list_del(element);
 279                 kfree(list_entry(element, struct iwl3945_frame, list));
 280                 priv->frames_count--;
 281         }
 282
 283         if (priv->frames_count) {
 284                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 285                             priv->frames_count);
 286                 priv->frames_count = 0;
 287         }
 288 }
 289
 290 static struct iwl3945_frame *iwl3945_get_free_frame(struct iwl_priv *priv)
 291 {
 292         struct iwl3945_frame *frame;
 293         struct list_head *element;
 294         if (list_empty(&priv->free_frames)) {
 295                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 296                 if (!frame) {
 297                         IWL_ERR(priv, "Could not allocate frame!\n");
 298                         return NULL;
 299                 }
 300
 301                 priv->frames_count++;
 302                 return frame;
 303         }
 304
 305         element = priv->free_frames.next;
 306         list_del(element);
 307         return list_entry(element, struct iwl3945_frame, list);
 308 }
 309
 310 static void iwl3945_free_frame(struct iwl_priv *priv, struct iwl3945_frame *frame)
 311 {
 312         memset(frame, 0, sizeof(*frame));
 313         list_add(&frame->list, &priv->free_frames);
 314 }
 315
 316 unsigned int iwl3945_fill_beacon_frame(struct iwl_priv *priv,
 317                                 struct ieee80211_hdr *hdr,
 318                                 int left)
 319 {
 320
 321         if (!iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS) || !priv->beacon_skb)
 322                 return 0;
 323
 324         if (priv->beacon_skb->len > left)
 325                 return 0;
 326
 327         memcpy(hdr, priv->beacon_skb->data, priv->beacon_skb->len);
 328
 329         return priv->beacon_skb->len;
 330 }
 331
 332 static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
 333 {
 334         struct iwl3945_frame *frame;
 335         unsigned int frame_size;
 336         int rc;
 337         u8 rate;
 338
 339         frame = iwl3945_get_free_frame(priv);
 340
 341         if (!frame) {
 342                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 343                           "command.\n");
 344                 return -ENOMEM;
 345         }
 346
 347         rate = iwl_legacy_get_lowest_plcp(priv,
 348                                 &priv->contexts[IWL_RXON_CTX_BSS]);
 349
 350         frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);
 351
 352         rc = iwl_legacy_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 353                               &frame->u.cmd[0]);
 354
 355         iwl3945_free_frame(priv, frame);
 356
 357         return rc;
 358 }
 359
 360 static void iwl3945_unset_hw_params(struct iwl_priv *priv)
 361 {
 362         if (priv->_3945.shared_virt)
 363                 dma_free_coherent(&priv->pci_dev->dev,
 364                                   sizeof(struct iwl3945_shared),
 365                                   priv->_3945.shared_virt,
 366                                   priv->_3945.shared_phys);
 367 }
 368
 369 static void iwl3945_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
 370                                       struct ieee80211_tx_info *info,
 371                                       struct iwl_device_cmd *cmd,
 372                                       struct sk_buff *skb_frag,
 373                                       int sta_id)
 374 {
 375         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 376         struct iwl_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
 377
 378         tx_cmd->sec_ctl = 0;
 379
 380         switch (keyinfo->cipher) {
 381         case WLAN_CIPHER_SUITE_CCMP:
 382                 tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
 383                 memcpy(tx_cmd->key, keyinfo->key, keyinfo->keylen);
 384                 IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n");
 385                 break;
 386
 387         case WLAN_CIPHER_SUITE_TKIP:
 388                 break;
 389
 390         case WLAN_CIPHER_SUITE_WEP104:
 391                 tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
 392                 /* fall through */
 393         case WLAN_CIPHER_SUITE_WEP40:
 394                 tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
 395                     (info->control.hw_key->hw_key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
 396
 397                 memcpy(&tx_cmd->key[3], keyinfo->key, keyinfo->keylen);
 398
 399                 IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption "
 400                              "with key %d\n", info->control.hw_key->hw_key_idx);
 401                 break;
 402
 403         default:
 404                 IWL_ERR(priv, "Unknown encode cipher %x\n", keyinfo->cipher);
 405                 break;
 406         }
 407 }
 408
 409 /*
 410  * handle build REPLY_TX command notification.
 411  */
 412 static void iwl3945_build_tx_cmd_basic(struct iwl_priv *priv,
 413                                   struct iwl_device_cmd *cmd,
 414                                   struct ieee80211_tx_info *info,
 415                                   struct ieee80211_hdr *hdr, u8 std_id)
 416 {
 417         struct iwl3945_tx_cmd *tx_cmd = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
 418         __le32 tx_flags = tx_cmd->tx_flags;
 419         __le16 fc = hdr->frame_control;
 420
 421         tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 422         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 423                 tx_flags |= TX_CMD_FLG_ACK_MSK;
 424                 if (ieee80211_is_mgmt(fc))
 425                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 426                 if (ieee80211_is_probe_resp(fc) &&
 427                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
 428                         tx_flags |= TX_CMD_FLG_TSF_MSK;
 429         } else {
 430                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
 431                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 432         }
 433
 434         tx_cmd->sta_id = std_id;
 435         if (ieee80211_has_morefrags(fc))
 436                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
 437
 438         if (ieee80211_is_data_qos(fc)) {
 439                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 440                 tx_cmd->tid_tspec = qc[0] & 0xf;
 441                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
 442         } else {
 443                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
 444         }
 445
 446         iwl_legacy_tx_cmd_protection(priv, info, fc, &tx_flags);
 447
 448         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
 449         if (ieee80211_is_mgmt(fc)) {
 450                 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
 451                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
 452                 else
 453                         tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
 454         } else {
 455                 tx_cmd->timeout.pm_frame_timeout = 0;
 456         }
 457
 458         tx_cmd->driver_txop = 0;
 459         tx_cmd->tx_flags = tx_flags;
 460         tx_cmd->next_frame_len = 0;
 461 }
 462
 463 /*
 464  * start REPLY_TX command process
 465  */
 466 static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 467 {
 468         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 469         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 470         struct iwl3945_tx_cmd *tx_cmd;
 471         struct iwl_tx_queue *txq = NULL;
 472         struct iwl_queue *q = NULL;
 473         struct iwl_device_cmd *out_cmd;
 474         struct iwl_cmd_meta *out_meta;
 475         dma_addr_t phys_addr;
 476         dma_addr_t txcmd_phys;
 477         int txq_id = skb_get_queue_mapping(skb);
 478         u16 len, idx, hdr_len;
 479         u8 id;
 480         u8 unicast;
 481         u8 sta_id;
 482         u8 tid = 0;
 483         __le16 fc;
 484         u8 wait_write_ptr = 0;
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&priv->lock, flags);
 488         if (iwl_legacy_is_rfkill(priv)) {
 489                 IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n");
 490                 goto drop_unlock;
 491         }
 492
 493         if ((ieee80211_get_tx_rate(priv->hw, info)->hw_value & 0xFF) == IWL_INVALID_RATE) {
 494                 IWL_ERR(priv, "ERROR: No TX rate available.\n");
 495                 goto drop_unlock;
 496         }
 497
 498         unicast = !is_multicast_ether_addr(hdr->addr1);
 499         id = 0;
 500
 501         fc = hdr->frame_control;
 502
 503 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 504         if (ieee80211_is_auth(fc))
 505                 IWL_DEBUG_TX(priv, "Sending AUTH frame\n");
 506         else if (ieee80211_is_assoc_req(fc))
 507                 IWL_DEBUG_TX(priv, "Sending ASSOC frame\n");
 508         else if (ieee80211_is_reassoc_req(fc))
 509                 IWL_DEBUG_TX(priv, "Sending REASSOC frame\n");
 510 #endif
 511
 512         spin_unlock_irqrestore(&priv->lock, flags);
 513
 514         hdr_len = ieee80211_hdrlen(fc);
 515
 516         /* Find index into station table for destination station */
 517         sta_id = iwl_legacy_sta_id_or_broadcast(
 518                         priv, &priv->contexts[IWL_RXON_CTX_BSS],
 519                         info->control.sta);
 520         if (sta_id == IWL_INVALID_STATION) {
 521                 IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n",
 522                                hdr->addr1);
 523                 goto drop;
 524         }
 525
 526         IWL_DEBUG_RATE(priv, "station Id %d\n", sta_id);
 527
 528         if (ieee80211_is_data_qos(fc)) {
 529                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 530                 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 531                 if (unlikely(tid >= MAX_TID_COUNT))
 532                         goto drop;
 533         }
 534
 535         /* Descriptor for chosen Tx queue */
 536         txq = &priv->txq[txq_id];
 537         q = &txq->q;
 538
 539         if ((iwl_legacy_queue_space(q) < q->high_mark))
 540                 goto drop;
 541
 542         spin_lock_irqsave(&priv->lock, flags);
 543
 544         idx = iwl_legacy_get_cmd_index(q, q->write_ptr, 0);
 545
 546         /* Set up driver data for this TFD */
 547         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
 548         txq->txb[q->write_ptr].skb = skb;
 549         txq->txb[q->write_ptr].ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 550
 551         /* Init first empty entry in queue's array of Tx/cmd buffers */
 552         out_cmd = txq->cmd[idx];
 553         out_meta = &txq->meta[idx];
 554         tx_cmd = (struct iwl3945_tx_cmd *)out_cmd->cmd.payload;
 555         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
 556         memset(tx_cmd, 0, sizeof(*tx_cmd));
 557
 558         /*
 559          * Set up the Tx-command (not MAC!) header.
 560          * Store the chosen Tx queue and TFD index within the sequence field;
 561          * after Tx, uCode's Tx response will return this value so driver can
 562          * locate the frame within the tx queue and do post-tx processing.
 563          */
 564         out_cmd->hdr.cmd = REPLY_TX;
 565         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
 566                                 INDEX_TO_SEQ(q->write_ptr)));
 567
 568         /* Copy MAC header from skb into command buffer */
 569         memcpy(tx_cmd->hdr, hdr, hdr_len);
 570
 571
 572         if (info->control.hw_key)
 573                 iwl3945_build_tx_cmd_hwcrypto(priv, info, out_cmd, skb, sta_id);
 574
 575         /* TODO need this for burst mode later on */
 576         iwl3945_build_tx_cmd_basic(priv, out_cmd, info, hdr, sta_id);
 577
 578         /* set is_hcca to 0; it probably will never be implemented */
 579         iwl3945_hw_build_tx_cmd_rate(priv, out_cmd, info, hdr, sta_id, 0);
 580
 581         /* Total # bytes to be transmitted */
 582         len = (u16)skb->len;
 583         tx_cmd->len = cpu_to_le16(len);
 584
 585         iwl_legacy_dbg_log_tx_data_frame(priv, len, hdr);
 586         iwl_legacy_update_stats(priv, true, fc, len);
 587         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_A_MSK;
 588         tx_cmd->tx_flags &= ~TX_CMD_FLG_ANT_B_MSK;
 589
 590         if (!ieee80211_has_morefrags(hdr->frame_control)) {
 591                 txq->need_update = 1;
 592         } else {
 593                 wait_write_ptr = 1;
 594                 txq->need_update = 0;
 595         }
 596
 597         IWL_DEBUG_TX(priv, "sequence nr = 0X%x\n",
 598                      le16_to_cpu(out_cmd->hdr.sequence));
 599         IWL_DEBUG_TX(priv, "tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
 600         iwl_print_hex_dump(priv, IWL_DL_TX, tx_cmd, sizeof(*tx_cmd));
 601         iwl_print_hex_dump(priv, IWL_DL_TX, (u8 *)tx_cmd->hdr,
 602                            ieee80211_hdrlen(fc));
 603
 604         /*
 605          * Use the first empty entry in this queue's command buffer array
 606          * to contain the Tx command and MAC header concatenated together
 607          * (payload data will be in another buffer).
 608          * Size of this varies, due to varying MAC header length.
 609          * If end is not dword aligned, we'll have 2 extra bytes at the end
 610          * of the MAC header (device reads on dword boundaries).
 611          * We'll tell device about this padding later.
 612          */
 613         len = sizeof(struct iwl3945_tx_cmd) +
 614                         sizeof(struct iwl_cmd_header) + hdr_len;
 615         len = (len + 3) & ~3;
 616
 617         /* Physical address of this Tx command's header (not MAC header!),
 618          * within command buffer array. */
 619         txcmd_phys = pci_map_single(priv->pci_dev, &out_cmd->hdr,
 620                                     len, PCI_DMA_TODEVICE);
 621         /* we do not map meta data ... so we can safely access address to
 622          * provide to unmap command*/
 623         dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
 624         dma_unmap_len_set(out_meta, len, len);
 625
 626         /* Add buffer containing Tx command and MAC(!) header to TFD's
 627          * first entry */
 628         priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 629                                                    txcmd_phys, len, 1, 0);
 630
 631
 632         /* Set up TFD's 2nd entry to point directly to remainder of skb,
 633          * if any (802.11 null frames have no payload). */
 634         len = skb->len - hdr_len;
 635         if (len) {
 636                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
 637                                            len, PCI_DMA_TODEVICE);
 638                 priv->cfg->ops->lib->txq_attach_buf_to_tfd(priv, txq,
 639                                                            phys_addr, len,
 640                                                            0, U32_PAD(len));
 641         }
 642
 643
 644         /* Tell device the write index *just past* this latest filled TFD */
 645         q->write_ptr = iwl_legacy_queue_inc_wrap(q->write_ptr, q->n_bd);
 646         iwl_legacy_txq_update_write_ptr(priv, txq);
 647         spin_unlock_irqrestore(&priv->lock, flags);
 648
 649         if ((iwl_legacy_queue_space(q) < q->high_mark)
 650             && priv->mac80211_registered) {
 651                 if (wait_write_ptr) {
 652                         spin_lock_irqsave(&priv->lock, flags);
 653                         txq->need_update = 1;
 654                         iwl_legacy_txq_update_write_ptr(priv, txq);
 655                         spin_unlock_irqrestore(&priv->lock, flags);
 656                 }
 657
 658                 iwl_legacy_stop_queue(priv, txq);
 659         }
 660
 661         return 0;
 662
 663 drop_unlock:
 664         spin_unlock_irqrestore(&priv->lock, flags);
 665 drop:
 666         return -1;
 667 }
 668
 669 static int iwl3945_get_measurement(struct iwl_priv *priv,
 670                                struct ieee80211_measurement_params *params,
 671                                u8 type)
 672 {
 673         struct iwl_spectrum_cmd spectrum;
 674         struct iwl_rx_packet *pkt;
 675         struct iwl_host_cmd cmd = {
 676                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 677                 .data = (void *)&spectrum,
 678                 .flags = CMD_WANT_SKB,
 679         };
 680         u32 add_time = le64_to_cpu(params->start_time);
 681         int rc;
 682         int spectrum_resp_status;
 683         int duration = le16_to_cpu(params->duration);
 684         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 685
 686         if (iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS))
 687                 add_time = iwl_legacy_usecs_to_beacons(priv,
 688                         le64_to_cpu(params->start_time) - priv->_3945.last_tsf,
 689                         le16_to_cpu(ctx->timing.beacon_interval));
 690
 691         memset(&spectrum, 0, sizeof(spectrum));
 692
 693         spectrum.channel_count = cpu_to_le16(1);
 694         spectrum.flags =
 695             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 696         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 697         cmd.len = sizeof(spectrum);
 698         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 699
 700         if (iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS))
 701                 spectrum.start_time =
 702                         iwl_legacy_add_beacon_time(priv,
 703                                 priv->_3945.last_beacon_time, add_time,
 704                                 le16_to_cpu(ctx->timing.beacon_interval));
 705         else
 706                 spectrum.start_time = 0;
 707
 708         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 709         spectrum.channels[0].channel = params->channel;
 710         spectrum.channels[0].type = type;
 711         if (ctx->active.flags & RXON_FLG_BAND_24G_MSK)
 712                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 713                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 714
 715         rc = iwl_legacy_send_cmd_sync(priv, &cmd);
 716         if (rc)
 717                 return rc;
 718
 719         pkt = (struct iwl_rx_packet *)cmd.reply_page;
 720         if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
 721                 IWL_ERR(priv, "Bad return from REPLY_RX_ON_ASSOC command\n");
 722                 rc = -EIO;
 723         }
 724
 725         spectrum_resp_status = le16_to_cpu(pkt->u.spectrum.status);
 726         switch (spectrum_resp_status) {
 727         case 0:         /* Command will be handled */
 728                 if (pkt->u.spectrum.id != 0xff) {
 729                         IWL_DEBUG_INFO(priv, "Replaced existing measurement: %d\n",
 730                                                 pkt->u.spectrum.id);
 731                         priv->measurement_status &= ~MEASUREMENT_READY;
 732                 }
 733                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 734                 rc = 0;
 735                 break;
 736
 737         case 1:         /* Command will not be handled */
 738                 rc = -EAGAIN;
 739                 break;
 740         }
 741
 742         iwl_legacy_free_pages(priv, cmd.reply_page);
 743
 744         return rc;
 745 }
 746
 747 static void iwl3945_rx_reply_alive(struct iwl_priv *priv,
 748                                struct iwl_rx_mem_buffer *rxb)
 749 {
 750         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 751         struct iwl_alive_resp *palive;
 752         struct delayed_work *pwork;
 753
 754         palive = &pkt->u.alive_frame;
 755
 756         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 757                        "0x%01X 0x%01X\n",
 758                        palive->is_valid, palive->ver_type,
 759                        palive->ver_subtype);
 760
 761         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 762                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 763                 memcpy(&priv->card_alive_init, &pkt->u.alive_frame,
 764                        sizeof(struct iwl_alive_resp));
 765                 pwork = &priv->init_alive_start;
 766         } else {
 767                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 768                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 769                        sizeof(struct iwl_alive_resp));
 770                 pwork = &priv->alive_start;
 771                 iwl3945_disable_events(priv);
 772         }
 773
 774         /* We delay the ALIVE response by 5ms to
 775          * give the HW RF Kill time to activate... */
 776         if (palive->is_valid == UCODE_VALID_OK)
 777                 queue_delayed_work(priv->workqueue, pwork,
 778                                    msecs_to_jiffies(5));
 779         else
 780                 IWL_WARN(priv, "uCode did not respond OK.\n");
 781 }
 782
 783 static void iwl3945_rx_reply_add_sta(struct iwl_priv *priv,
 784                                  struct iwl_rx_mem_buffer *rxb)
 785 {
 786 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 787         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 788 #endif
 789
 790         IWL_DEBUG_RX(priv, "Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
 791 }
 792
 793 static void iwl3945_rx_beacon_notif(struct iwl_priv *priv,
 794                                 struct iwl_rx_mem_buffer *rxb)
 795 {
 796         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 797         struct iwl3945_beacon_notif *beacon = &(pkt->u.beacon_status);
 798 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 799         u8 rate = beacon->beacon_notify_hdr.rate;
 800
 801         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 802                 "tsf %d %d rate %d\n",
 803                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
 804                 beacon->beacon_notify_hdr.failure_frame,
 805                 le32_to_cpu(beacon->ibss_mgr_status),
 806                 le32_to_cpu(beacon->high_tsf),
 807                 le32_to_cpu(beacon->low_tsf), rate);
 808 #endif
 809
 810         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 811
 812 }
 813
 814 /* Handle notification from uCode that card's power state is changing
 815  * due to software, hardware, or critical temperature RFKILL */
 816 static void iwl3945_rx_card_state_notif(struct iwl_priv *priv,
 817                                     struct iwl_rx_mem_buffer *rxb)
 818 {
 819         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 820         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 821         unsigned long status = priv->status;
 822
 823         IWL_WARN(priv, "Card state received: HW:%s SW:%s\n",
 824                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 825                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 826
 827         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 828                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 829
 830         if (flags & HW_CARD_DISABLED)
 831                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 832         else
 833                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 834
 835
 836         iwl_legacy_scan_cancel(priv);
 837
 838         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 839              test_bit(STATUS_RF_KILL_HW, &priv->status)))
 840                 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
 841                                 test_bit(STATUS_RF_KILL_HW, &priv->status));
 842         else
 843                 wake_up_interruptible(&priv->wait_command_queue);
 844 }
 845
 846 /**
 847  * iwl3945_setup_rx_handlers - Initialize Rx handler callbacks
 848  *
 849  * Setup the RX handlers for each of the reply types sent from the uCode
 850  * to the host.
 851  *
 852  * This function chains into the hardware specific files for them to setup
 853  * any hardware specific handlers as well.
 854  */
 855 static void iwl3945_setup_rx_handlers(struct iwl_priv *priv)
 856 {
 857         priv->rx_handlers[REPLY_ALIVE] = iwl3945_rx_reply_alive;
 858         priv->rx_handlers[REPLY_ADD_STA] = iwl3945_rx_reply_add_sta;
 859         priv->rx_handlers[REPLY_ERROR] = iwl_legacy_rx_reply_error;
 860         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_legacy_rx_csa;
 861         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
 862                         iwl_legacy_rx_spectrum_measure_notif;
 863         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_legacy_rx_pm_sleep_notif;
 864         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 865             iwl_legacy_rx_pm_debug_statistics_notif;
 866         priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
 867
 868         /*
 869          * The same handler is used for both the REPLY to a discrete
 870          * statistics request from the host as well as for the periodic
 871          * statistics notifications (after received beacons) from the uCode.
 872          */
 873         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_reply_statistics;
 874         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
 875
 876         iwl_legacy_setup_rx_scan_handlers(priv);
 877         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
 878
 879         /* Set up hardware specific Rx handlers */
 880         iwl3945_hw_rx_handler_setup(priv);
 881 }
 882
 883 /************************** RX-FUNCTIONS ****************************/
 884 /*
 885  * Rx theory of operation
 886  *
 887  * The host allocates 32 DMA target addresses and passes the host address
 888  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
 889  * 0 to 31
 890  *
 891  * Rx Queue Indexes
 892  * The host/firmware share two index registers for managing the Rx buffers.
 893  *
 894  * The READ index maps to the first position that the firmware may be writing
 895  * to -- the driver can read up to (but not including) this position and get
 896  * good data.
 897  * The READ index is managed by the firmware once the card is enabled.
 898  *
 899  * The WRITE index maps to the last position the driver has read from -- the
 900  * position preceding WRITE is the last slot the firmware can place a packet.
 901  *
 902  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
 903  * WRITE = READ.
 904  *
 905  * During initialization, the host sets up the READ queue position to the first
 906  * INDEX position, and WRITE to the last (READ - 1 wrapped)
 907  *
 908  * When the firmware places a packet in a buffer, it will advance the READ index
 909  * and fire the RX interrupt.  The driver can then query the READ index and
 910  * process as many packets as possible, moving the WRITE index forward as it
 911  * resets the Rx queue buffers with new memory.
 912  *
 913  * The management in the driver is as follows:
 914  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
 915  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
 916  *   to replenish the iwl->rxq->rx_free.
 917  * + In iwl3945_rx_replenish (scheduled) if 'processed' != 'read' then the
 918  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
 919  *   'processed' and 'read' driver indexes as well)
 920  * + A received packet is processed and handed to the kernel network stack,
 921  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
 922  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
 923  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
 924  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
 925  *   were enough free buffers and RX_STALLED is set it is cleared.
 926  *
 927  *
 928  * Driver sequence:
 929  *
 930  * iwl3945_rx_replenish()     Replenishes rx_free list from rx_used, and calls
 931  *                            iwl3945_rx_queue_restock
 932  * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
 933  *                            queue, updates firmware pointers, and updates
 934  *                            the WRITE index.  If insufficient rx_free buffers
 935  *                            are available, schedules iwl3945_rx_replenish
 936  *
 937  * -- enable interrupts --
 938  * ISR - iwl3945_rx()         Detach iwl_rx_mem_buffers from pool up to the
 939  *                            READ INDEX, detaching the SKB from the pool.
 940  *                            Moves the packet buffer from queue to rx_used.
 941  *                            Calls iwl3945_rx_queue_restock to refill any empty
 942  *                            slots.
 943  * ...
 944  *
 945  */
 946
 947 /**
 948  * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
 949  */
 950 static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl_priv *priv,
 951                                           dma_addr_t dma_addr)
 952 {
 953         return cpu_to_le32((u32)dma_addr);
 954 }
 955
 956 /**
 957  * iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
 958  *
 959  * If there are slots in the RX queue that need to be restocked,
 960  * and we have free pre-allocated buffers, fill the ranks as much
 961  * as we can, pulling from rx_free.
 962  *
 963  * This moves the 'write' index forward to catch up with 'processed', and
 964  * also updates the memory address in the firmware to reference the new
 965  * target buffer.
 966  */
 967 static void iwl3945_rx_queue_restock(struct iwl_priv *priv)
 968 {
 969         struct iwl_rx_queue *rxq = &priv->rxq;
 970         struct list_head *element;
 971         struct iwl_rx_mem_buffer *rxb;
 972         unsigned long flags;
 973         int write;
 974
 975         spin_lock_irqsave(&rxq->lock, flags);
 976         write = rxq->write & ~0x7;
 977         while ((iwl_legacy_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
 978                 /* Get next free Rx buffer, remove from free list */
 979                 element = rxq->rx_free.next;
 980                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
 981                 list_del(element);
 982
 983                 /* Point to Rx buffer via next RBD in circular buffer */
 984                 rxq->bd[rxq->write] = iwl3945_dma_addr2rbd_ptr(priv, rxb->page_dma);
 985                 rxq->queue[rxq->write] = rxb;
 986                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
 987                 rxq->free_count--;
 988         }
 989         spin_unlock_irqrestore(&rxq->lock, flags);
 990         /* If the pre-allocated buffer pool is dropping low, schedule to
 991          * refill it */
 992         if (rxq->free_count <= RX_LOW_WATERMARK)
 993                 queue_work(priv->workqueue, &priv->rx_replenish);
 994
 995
 996         /* If we've added more space for the firmware to place data, tell it.
 997          * Increment device's write pointer in multiples of 8. */
 998         if ((rxq->write_actual != (rxq->write & ~0x7))
 999             || (abs(rxq->write - rxq->read) > 7)) {
1000                 spin_lock_irqsave(&rxq->lock, flags);
1001                 rxq->need_update = 1;
1002                 spin_unlock_irqrestore(&rxq->lock, flags);
1003                 iwl_legacy_rx_queue_update_write_ptr(priv, rxq);
1004         }
1005 }
1006
1007 /**
1008  * iwl3945_rx_replenish - Move all used packet from rx_used to rx_free
1009  *
1010  * When moving to rx_free an SKB is allocated for the slot.
1011  *
1012  * Also restock the Rx queue via iwl3945_rx_queue_restock.
1013  * This is called as a scheduled work item (except for during initialization)
1014  */
1015 static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority)
1016 {
1017         struct iwl_rx_queue *rxq = &priv->rxq;
1018         struct list_head *element;
1019         struct iwl_rx_mem_buffer *rxb;
1020         struct page *page;
1021         unsigned long flags;
1022         gfp_t gfp_mask = priority;
1023
1024         while (1) {
1025                 spin_lock_irqsave(&rxq->lock, flags);
1026
1027                 if (list_empty(&rxq->rx_used)) {
1028                         spin_unlock_irqrestore(&rxq->lock, flags);
1029                         return;
1030                 }
1031                 spin_unlock_irqrestore(&rxq->lock, flags);
1032
1033                 if (rxq->free_count > RX_LOW_WATERMARK)
1034                         gfp_mask |= __GFP_NOWARN;
1035
1036                 if (priv->hw_params.rx_page_order > 0)
1037                         gfp_mask |= __GFP_COMP;
1038
1039                 /* Alloc a new receive buffer */
1040                 page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
1041                 if (!page) {
1042                         if (net_ratelimit())
1043                                 IWL_DEBUG_INFO(priv, "Failed to allocate SKB buffer.\n");
1044                         if ((rxq->free_count <= RX_LOW_WATERMARK) &&
1045                             net_ratelimit())
1046                                 IWL_CRIT(priv, "Failed to allocate SKB buffer with %s. Only %u free buffers remaining.\n",
1047                                          priority == GFP_ATOMIC ?  "GFP_ATOMIC" : "GFP_KERNEL",
1048                                          rxq->free_count);
1049                         /* We don't reschedule replenish work here -- we will
1050                          * call the restock method and if it still needs
1051                          * more buffers it will schedule replenish */
1052                         break;
1053                 }
1054
1055                 spin_lock_irqsave(&rxq->lock, flags);
1056                 if (list_empty(&rxq->rx_used)) {
1057                         spin_unlock_irqrestore(&rxq->lock, flags);
1058                         __free_pages(page, priv->hw_params.rx_page_order);
1059                         return;
1060                 }
1061                 element = rxq->rx_used.next;
1062                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
1063                 list_del(element);
1064                 spin_unlock_irqrestore(&rxq->lock, flags);
1065
1066                 rxb->page = page;
1067                 /* Get physical address of RB/SKB */
1068                 rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
1069                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1070                                 PCI_DMA_FROMDEVICE);
1071
1072                 spin_lock_irqsave(&rxq->lock, flags);
1073
1074                 list_add_tail(&rxb->list, &rxq->rx_free);
1075                 rxq->free_count++;
1076                 priv->alloc_rxb_page++;
1077
1078                 spin_unlock_irqrestore(&rxq->lock, flags);
1079         }
1080 }
1081
1082 void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1083 {
1084         unsigned long flags;
1085         int i;
1086         spin_lock_irqsave(&rxq->lock, flags);
1087         INIT_LIST_HEAD(&rxq->rx_free);
1088         INIT_LIST_HEAD(&rxq->rx_used);
1089         /* Fill the rx_used queue with _all_ of the Rx buffers */
1090         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
1091                 /* In the reset function, these buffers may have been allocated
1092                  * to an SKB, so we need to unmap and free potential storage */
1093                 if (rxq->pool[i].page != NULL) {
1094                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1095                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1096                                 PCI_DMA_FROMDEVICE);
1097                         __iwl_legacy_free_pages(priv, rxq->pool[i].page);
1098                         rxq->pool[i].page = NULL;
1099                 }
1100                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
1101         }
1102
1103         /* Set us so that we have processed and used all buffers, but have
1104          * not restocked the Rx queue with fresh buffers */
1105         rxq->read = rxq->write = 0;
1106         rxq->write_actual = 0;
1107         rxq->free_count = 0;
1108         spin_unlock_irqrestore(&rxq->lock, flags);
1109 }
1110
1111 void iwl3945_rx_replenish(void *data)
1112 {
1113         struct iwl_priv *priv = data;
1114         unsigned long flags;
1115
1116         iwl3945_rx_allocate(priv, GFP_KERNEL);
1117
1118         spin_lock_irqsave(&priv->lock, flags);
1119         iwl3945_rx_queue_restock(priv);
1120         spin_unlock_irqrestore(&priv->lock, flags);
1121 }
1122
1123 static void iwl3945_rx_replenish_now(struct iwl_priv *priv)
1124 {
1125         iwl3945_rx_allocate(priv, GFP_ATOMIC);
1126
1127         iwl3945_rx_queue_restock(priv);
1128 }
1129
1130
1131 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
1132  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
1133  * This free routine walks the list of POOL entries and if SKB is set to
1134  * non NULL it is unmapped and freed
1135  */
1136 static void iwl3945_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
1137 {
1138         int i;
1139         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
1140                 if (rxq->pool[i].page != NULL) {
1141                         pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
1142                                 PAGE_SIZE << priv->hw_params.rx_page_order,
1143                                 PCI_DMA_FROMDEVICE);
1144                         __iwl_legacy_free_pages(priv, rxq->pool[i].page);
1145                         rxq->pool[i].page = NULL;
1146                 }
1147         }
1148
1149         dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
1150                           rxq->bd_dma);
1151         dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
1152                           rxq->rb_stts, rxq->rb_stts_dma);
1153         rxq->bd = NULL;
1154         rxq->rb_stts  = NULL;
1155 }
1156
1157
1158 /* Convert linear signal-to-noise ratio into dB */
1159 static u8 ratio2dB[100] = {
1160 /*       0   1   2   3   4   5   6   7   8   9 */
1161          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
1162         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
1163         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
1164         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
1165         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
1166         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
1167         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
1168         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
1169         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
1170         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
1171 };
1172
1173 /* Calculates a relative dB value from a ratio of linear
1174  *   (i.e. not dB) signal levels.
1175  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
1176 int iwl3945_calc_db_from_ratio(int sig_ratio)
1177 {
1178         /* 1000:1 or higher just report as 60 dB */
1179         if (sig_ratio >= 1000)
1180                 return 60;
1181
1182         /* 100:1 or higher, divide by 10 and use table,
1183          *   add 20 dB to make up for divide by 10 */
1184         if (sig_ratio >= 100)
1185                 return 20 + (int)ratio2dB[sig_ratio/10];
1186
1187         /* We shouldn't see this */
1188         if (sig_ratio < 1)
1189                 return 0;
1190
1191         /* Use table for ratios 1:1 - 99:1 */
1192         return (int)ratio2dB[sig_ratio];
1193 }
1194
1195 /**
1196  * iwl3945_rx_handle - Main entry function for receiving responses from uCode
1197  *
1198  * Uses the priv->rx_handlers callback function array to invoke
1199  * the appropriate handlers, including command responses,
1200  * frame-received notifications, and other notifications.
1201  */
1202 static void iwl3945_rx_handle(struct iwl_priv *priv)
1203 {
1204         struct iwl_rx_mem_buffer *rxb;
1205         struct iwl_rx_packet *pkt;
1206         struct iwl_rx_queue *rxq = &priv->rxq;
1207         u32 r, i;
1208         int reclaim;
1209         unsigned long flags;
1210         u8 fill_rx = 0;
1211         u32 count = 8;
1212         int total_empty = 0;
1213
1214         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1215          * buffer that the driver may process (last buffer filled by ucode). */
1216         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1217         i = rxq->read;
1218
1219         /* calculate total frames need to be restock after handling RX */
1220         total_empty = r - rxq->write_actual;
1221         if (total_empty < 0)
1222                 total_empty += RX_QUEUE_SIZE;
1223
1224         if (total_empty > (RX_QUEUE_SIZE / 2))
1225                 fill_rx = 1;
1226         /* Rx interrupt, but nothing sent from uCode */
1227         if (i == r)
1228                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1229
1230         while (i != r) {
1231                 int len;
1232
1233                 rxb = rxq->queue[i];
1234
1235                 /* If an RXB doesn't have a Rx queue slot associated with it,
1236                  * then a bug has been introduced in the queue refilling
1237                  * routines -- catch it here */
1238                 BUG_ON(rxb == NULL);
1239
1240                 rxq->queue[i] = NULL;
1241
1242                 pci_unmap_page(priv->pci_dev, rxb->page_dma,
1243                                PAGE_SIZE << priv->hw_params.rx_page_order,
1244                                PCI_DMA_FROMDEVICE);
1245                 pkt = rxb_addr(rxb);
1246
1247                 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1248                 len += sizeof(u32); /* account for status word */
1249                 trace_iwlwifi_legacy_dev_rx(priv, pkt, len);
1250
1251                 /* Reclaim a command buffer only if this packet is a response
1252                  *   to a (driver-originated) command.
1253                  * If the packet (e.g. Rx frame) originated from uCode,
1254                  *   there is no command buffer to reclaim.
1255                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1256                  *   but apparently a few don't get set; catch them here. */
1257                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1258                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1259                         (pkt->hdr.cmd != REPLY_TX);
1260
1261                 /* Based on type of command response or notification,
1262                  *   handle those that need handling via function in
1263                  *   rx_handlers table.  See iwl3945_setup_rx_handlers() */
1264                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1265                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r, i,
1266                         iwl_legacy_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1267                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
1268                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1269                 } else {
1270                         /* No handling needed */
1271                         IWL_DEBUG_RX(priv,
1272                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1273                                 r, i, iwl_legacy_get_cmd_string(pkt->hdr.cmd),
1274                                 pkt->hdr.cmd);
1275                 }
1276
1277                 /*
1278                  * XXX: After here, we should always check rxb->page
1279                  * against NULL before touching it or its virtual
1280                  * memory (pkt). Because some rx_handler might have
1281                  * already taken or freed the pages.
1282                  */
1283
1284                 if (reclaim) {
1285                         /* Invoke any callbacks, transfer the buffer to caller,
1286                          * and fire off the (possibly) blocking iwl_legacy_send_cmd()
1287                          * as we reclaim the driver command queue */
1288                         if (rxb->page)
1289                                 iwl_legacy_tx_cmd_complete(priv, rxb);
1290                         else
1291                                 IWL_WARN(priv, "Claim null rxb?\n");
1292                 }
1293
1294                 /* Reuse the page if possible. For notification packets and
1295                  * SKBs that fail to Rx correctly, add them back into the
1296                  * rx_free list for reuse later. */
1297                 spin_lock_irqsave(&rxq->lock, flags);
1298                 if (rxb->page != NULL) {
1299                         rxb->page_dma = pci_map_page(priv->pci_dev, rxb->page,
1300                                 0, PAGE_SIZE << priv->hw_params.rx_page_order,
1301                                 PCI_DMA_FROMDEVICE);
1302                         list_add_tail(&rxb->list, &rxq->rx_free);
1303                         rxq->free_count++;
1304                 } else
1305                         list_add_tail(&rxb->list, &rxq->rx_used);
1306
1307                 spin_unlock_irqrestore(&rxq->lock, flags);
1308
1309                 i = (i + 1) & RX_QUEUE_MASK;
1310                 /* If there are a lot of unused frames,
1311                  * restock the Rx queue so ucode won't assert. */
1312                 if (fill_rx) {
1313                         count++;
1314                         if (count >= 8) {
1315                                 rxq->read = i;
1316                                 iwl3945_rx_replenish_now(priv);
1317                                 count = 0;
1318                         }
1319                 }
1320         }
1321
1322         /* Backtrack one entry */
1323         rxq->read = i;
1324         if (fill_rx)
1325                 iwl3945_rx_replenish_now(priv);
1326         else
1327                 iwl3945_rx_queue_restock(priv);
1328 }
1329
1330 /* call this function to flush any scheduled tasklet */
1331 static inline void iwl3945_synchronize_irq(struct iwl_priv *priv)
1332 {
1333         /* wait to make sure we flush pending tasklet*/
1334         synchronize_irq(priv->pci_dev->irq);
1335         tasklet_kill(&priv->irq_tasklet);
1336 }
1337
1338 static const char *iwl3945_desc_lookup(int i)
1339 {
1340         switch (i) {
1341         case 1:
1342                 return "FAIL";
1343         case 2:
1344                 return "BAD_PARAM";
1345         case 3:
1346                 return "BAD_CHECKSUM";
1347         case 4:
1348                 return "NMI_INTERRUPT";
1349         case 5:
1350                 return "SYSASSERT";
1351         case 6:
1352                 return "FATAL_ERROR";
1353         }
1354
1355         return "UNKNOWN";
1356 }
1357
1358 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1359 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1360
1361 void iwl3945_dump_nic_error_log(struct iwl_priv *priv)
1362 {
1363         u32 i;
1364         u32 desc, time, count, base, data1;
1365         u32 blink1, blink2, ilink1, ilink2;
1366
1367         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1368
1369         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1370                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1371                 return;
1372         }
1373
1374
1375         count = iwl_legacy_read_targ_mem(priv, base);
1376
1377         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1378                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1379                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1380                         priv->status, count);
1381         }
1382
1383         IWL_ERR(priv, "Desc       Time       asrtPC  blink2 "
1384                   "ilink1  nmiPC   Line\n");
1385         for (i = ERROR_START_OFFSET;
1386              i < (count * ERROR_ELEM_SIZE) + ERROR_START_OFFSET;
1387              i += ERROR_ELEM_SIZE) {
1388                 desc = iwl_legacy_read_targ_mem(priv, base + i);
1389                 time =
1390                     iwl_legacy_read_targ_mem(priv, base + i + 1 * sizeof(u32));
1391                 blink1 =
1392                     iwl_legacy_read_targ_mem(priv, base + i + 2 * sizeof(u32));
1393                 blink2 =
1394                     iwl_legacy_read_targ_mem(priv, base + i + 3 * sizeof(u32));
1395                 ilink1 =
1396                     iwl_legacy_read_targ_mem(priv, base + i + 4 * sizeof(u32));
1397                 ilink2 =
1398                     iwl_legacy_read_targ_mem(priv, base + i + 5 * sizeof(u32));
1399                 data1 =
1400                     iwl_legacy_read_targ_mem(priv, base + i + 6 * sizeof(u32));
1401
1402                 IWL_ERR(priv,
1403                         "%-13s (0x%X) %010u 0x%05X 0x%05X 0x%05X 0x%05X %u\n\n",
1404                         iwl3945_desc_lookup(desc), desc, time, blink1, blink2,
1405                         ilink1, ilink2, data1);
1406                 trace_iwlwifi_legacy_dev_ucode_error(priv, desc, time, data1, 0,
1407                                         0, blink1, blink2, ilink1, ilink2);
1408         }
1409 }
1410
1411 #define EVENT_START_OFFSET  (6 * sizeof(u32))
1412
1413 /**
1414  * iwl3945_print_event_log - Dump error event log to syslog
1415  *
1416  */
1417 static int iwl3945_print_event_log(struct iwl_priv *priv, u32 start_idx,
1418                                   u32 num_events, u32 mode,
1419                                   int pos, char **buf, size_t bufsz)
1420 {
1421         u32 i;
1422         u32 base;       /* SRAM byte address of event log header */
1423         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1424         u32 ptr;        /* SRAM byte address of log data */
1425         u32 ev, time, data; /* event log data */
1426         unsigned long reg_flags;
1427
1428         if (num_events == 0)
1429                 return pos;
1430
1431         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1432
1433         if (mode == 0)
1434                 event_size = 2 * sizeof(u32);
1435         else
1436                 event_size = 3 * sizeof(u32);
1437
1438         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1439
1440         /* Make sure device is powered up for SRAM reads */
1441         spin_lock_irqsave(&priv->reg_lock, reg_flags);
1442         iwl_grab_nic_access(priv);
1443
1444         /* Set starting address; reads will auto-increment */
1445         _iwl_legacy_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr);
1446         rmb();
1447
1448         /* "time" is actually "data" for mode 0 (no timestamp).
1449          * place event id # at far right for easier visual parsing. */
1450         for (i = 0; i < num_events; i++) {
1451                 ev = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1452                 time = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1453                 if (mode == 0) {
1454                         /* data, ev */
1455                         if (bufsz) {
1456                                 pos += scnprintf(*buf + pos, bufsz - pos,
1457                                                 "0x%08x:%04u\n",
1458                                                 time, ev);
1459                         } else {
1460                                 IWL_ERR(priv, "0x%08x\t%04u\n", time, ev);
1461                                 trace_iwlwifi_legacy_dev_ucode_event(priv, 0,
1462                                                               time, ev);
1463                         }
1464                 } else {
1465                         data = _iwl_legacy_read_direct32(priv,
1466                                                         HBUS_TARG_MEM_RDAT);
1467                         if (bufsz) {
1468                                 pos += scnprintf(*buf + pos, bufsz - pos,
1469                                                 "%010u:0x%08x:%04u\n",
1470                                                  time, data, ev);
1471                         } else {
1472                                 IWL_ERR(priv, "%010u\t0x%08x\t%04u\n",
1473                                         time, data, ev);
1474                                 trace_iwlwifi_legacy_dev_ucode_event(priv, time,
1475                                                               data, ev);
1476                         }
1477                 }
1478         }
1479
1480         /* Allow device to power down */
1481         iwl_release_nic_access(priv);
1482         spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
1483         return pos;
1484 }
1485
1486 /**
1487  * iwl3945_print_last_event_logs - Dump the newest # of event log to syslog
1488  */
1489 static int iwl3945_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1490                                       u32 num_wraps, u32 next_entry,
1491                                       u32 size, u32 mode,
1492                                       int pos, char **buf, size_t bufsz)
1493 {
1494         /*
1495          * display the newest DEFAULT_LOG_ENTRIES entries
1496          * i.e the entries just before the next ont that uCode would fill.
1497          */
1498         if (num_wraps) {
1499                 if (next_entry < size) {
1500                         pos = iwl3945_print_event_log(priv,
1501                                              capacity - (size - next_entry),
1502                                              size - next_entry, mode,
1503                                              pos, buf, bufsz);
1504                         pos = iwl3945_print_event_log(priv, 0,
1505                                                       next_entry, mode,
1506                                                       pos, buf, bufsz);
1507                 } else
1508                         pos = iwl3945_print_event_log(priv, next_entry - size,
1509                                                       size, mode,
1510                                                       pos, buf, bufsz);
1511         } else {
1512                 if (next_entry < size)
1513                         pos = iwl3945_print_event_log(priv, 0,
1514                                                       next_entry, mode,
1515                                                       pos, buf, bufsz);
1516                 else
1517                         pos = iwl3945_print_event_log(priv, next_entry - size,
1518                                                       size, mode,
1519                                                       pos, buf, bufsz);
1520         }
1521         return pos;
1522 }
1523
1524 #define DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES (20)
1525
1526 int iwl3945_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1527                             char **buf, bool display)
1528 {
1529         u32 base;       /* SRAM byte address of event log header */
1530         u32 capacity;   /* event log capacity in # entries */
1531         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1532         u32 num_wraps;  /* # times uCode wrapped to top of log */
1533         u32 next_entry; /* index of next entry to be written by uCode */
1534         u32 size;       /* # entries that we'll print */
1535         int pos = 0;
1536         size_t bufsz = 0;
1537
1538         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1539         if (!iwl3945_hw_valid_rtc_data_addr(base)) {
1540                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1541                 return  -EINVAL;
1542         }
1543
1544         /* event log header */
1545         capacity = iwl_legacy_read_targ_mem(priv, base);
1546         mode = iwl_legacy_read_targ_mem(priv, base + (1 * sizeof(u32)));
1547         num_wraps = iwl_legacy_read_targ_mem(priv, base + (2 * sizeof(u32)));
1548         next_entry = iwl_legacy_read_targ_mem(priv, base + (3 * sizeof(u32)));
1549
1550         if (capacity > priv->cfg->base_params->max_event_log_size) {
1551                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
1552                         capacity, priv->cfg->base_params->max_event_log_size);
1553                 capacity = priv->cfg->base_params->max_event_log_size;
1554         }
1555
1556         if (next_entry > priv->cfg->base_params->max_event_log_size) {
1557                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1558                         next_entry, priv->cfg->base_params->max_event_log_size);
1559                 next_entry = priv->cfg->base_params->max_event_log_size;
1560         }
1561
1562         size = num_wraps ? capacity : next_entry;
1563
1564         /* bail out if nothing in log */
1565         if (size == 0) {
1566                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1567                 return pos;
1568         }
1569
1570 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1571         if (!(iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS) && !full_log)
1572                 size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1573                         ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1574 #else
1575         size = (size > DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES)
1576                 ? DEFAULT_IWL3945_DUMP_EVENT_LOG_ENTRIES : size;
1577 #endif
1578
1579         IWL_ERR(priv, "Start IWL Event Log Dump: display last %d count\n",
1580                   size);
1581
1582 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1583         if (display) {
1584                 if (full_log)
1585                         bufsz = capacity * 48;
1586                 else
1587                         bufsz = size * 48;
1588                 *buf = kmalloc(bufsz, GFP_KERNEL);
1589                 if (!*buf)
1590                         return -ENOMEM;
1591         }
1592         if ((iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS) || full_log) {
1593                 /* if uCode has wrapped back to top of log,
1594                  * start at the oldest entry,
1595                  * i.e the next one that uCode would fill.
1596                  */
1597                 if (num_wraps)
1598                         pos = iwl3945_print_event_log(priv, next_entry,
1599                                                 capacity - next_entry, mode,
1600                                                 pos, buf, bufsz);
1601
1602                 /* (then/else) start at top of log */
1603                 pos = iwl3945_print_event_log(priv, 0, next_entry, mode,
1604                                               pos, buf, bufsz);
1605         } else
1606                 pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1607                                                     next_entry, size, mode,
1608                                                     pos, buf, bufsz);
1609 #else
1610         pos = iwl3945_print_last_event_logs(priv, capacity, num_wraps,
1611                                             next_entry, size, mode,
1612                                             pos, buf, bufsz);
1613 #endif
1614         return pos;
1615 }
1616
1617 static void iwl3945_irq_tasklet(struct iwl_priv *priv)
1618 {
1619         u32 inta, handled = 0;
1620         u32 inta_fh;
1621         unsigned long flags;
1622 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1623         u32 inta_mask;
1624 #endif
1625
1626         spin_lock_irqsave(&priv->lock, flags);
1627
1628         /* Ack/clear/reset pending uCode interrupts.
1629          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1630          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1631         inta = iwl_read32(priv, CSR_INT);
1632         iwl_write32(priv, CSR_INT, inta);
1633
1634         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1635          * Any new interrupts that happen after this, either while we're
1636          * in this tasklet, or later, will show up in next ISR/tasklet. */
1637         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1638         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1639
1640 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1641         if (iwl_legacy_get_debug_level(priv) & IWL_DL_ISR) {
1642                 /* just for debug */
1643                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1644                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1645                               inta, inta_mask, inta_fh);
1646         }
1647 #endif
1648
1649         spin_unlock_irqrestore(&priv->lock, flags);
1650
1651         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1652          * atomic, make sure that inta covers all the interrupts that
1653          * we've discovered, even if FH interrupt came in just after
1654          * reading CSR_INT. */
1655         if (inta_fh & CSR39_FH_INT_RX_MASK)
1656                 inta |= CSR_INT_BIT_FH_RX;
1657         if (inta_fh & CSR39_FH_INT_TX_MASK)
1658                 inta |= CSR_INT_BIT_FH_TX;
1659
1660         /* Now service all interrupt bits discovered above. */
1661         if (inta & CSR_INT_BIT_HW_ERR) {
1662                 IWL_ERR(priv, "Hardware error detected.  Restarting.\n");
1663
1664                 /* Tell the device to stop sending interrupts */
1665                 iwl_legacy_disable_interrupts(priv);
1666
1667                 priv->isr_stats.hw++;
1668                 iwl_legacy_irq_handle_error(priv);
1669
1670                 handled |= CSR_INT_BIT_HW_ERR;
1671
1672                 return;
1673         }
1674
1675 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1676         if (iwl_legacy_get_debug_level(priv) & (IWL_DL_ISR)) {
1677                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1678                 if (inta & CSR_INT_BIT_SCD) {
1679                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1680                                       "the frame/frames.\n");
1681                         priv->isr_stats.sch++;
1682                 }
1683
1684                 /* Alive notification via Rx interrupt will do the real work */
1685                 if (inta & CSR_INT_BIT_ALIVE) {
1686                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1687                         priv->isr_stats.alive++;
1688                 }
1689         }
1690 #endif
1691         /* Safely ignore these bits for debug checks below */
1692         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1693
1694         /* Error detected by uCode */
1695         if (inta & CSR_INT_BIT_SW_ERR) {
1696                 IWL_ERR(priv, "Microcode SW error detected. "
1697                         "Restarting 0x%X.\n", inta);
1698                 priv->isr_stats.sw++;
1699                 iwl_legacy_irq_handle_error(priv);
1700                 handled |= CSR_INT_BIT_SW_ERR;
1701         }
1702
1703         /* uCode wakes up after power-down sleep */
1704         if (inta & CSR_INT_BIT_WAKEUP) {
1705                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1706                 iwl_legacy_rx_queue_update_write_ptr(priv, &priv->rxq);
1707                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[0]);
1708                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[1]);
1709                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[2]);
1710                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[3]);
1711                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[4]);
1712                 iwl_legacy_txq_update_write_ptr(priv, &priv->txq[5]);
1713
1714                 priv->isr_stats.wakeup++;
1715                 handled |= CSR_INT_BIT_WAKEUP;
1716         }
1717
1718         /* All uCode command responses, including Tx command responses,
1719          * Rx "responses" (frame-received notification), and other
1720          * notifications from uCode come through here*/
1721         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1722                 iwl3945_rx_handle(priv);
1723                 priv->isr_stats.rx++;
1724                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1725         }
1726
1727         if (inta & CSR_INT_BIT_FH_TX) {
1728                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1729                 priv->isr_stats.tx++;
1730
1731                 iwl_write32(priv, CSR_FH_INT_STATUS, (1 << 6));
1732                 iwl_legacy_write_direct32(priv, FH39_TCSR_CREDIT
1733                                         (FH39_SRVC_CHNL), 0x0);
1734                 handled |= CSR_INT_BIT_FH_TX;
1735         }
1736
1737         if (inta & ~handled) {
1738                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1739                 priv->isr_stats.unhandled++;
1740         }
1741
1742         if (inta & ~priv->inta_mask) {
1743                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1744                          inta & ~priv->inta_mask);
1745                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1746         }
1747
1748         /* Re-enable all interrupts */
1749         /* only Re-enable if disabled by irq */
1750         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1751                 iwl_legacy_enable_interrupts(priv);
1752
1753 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1754         if (iwl_legacy_get_debug_level(priv) & (IWL_DL_ISR)) {
1755                 inta = iwl_read32(priv, CSR_INT);
1756                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1757                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1758                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1759                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1760         }
1761 #endif
1762 }
1763
1764 static int iwl3945_get_single_channel_for_scan(struct iwl_priv *priv,
1765                                                struct ieee80211_vif *vif,
1766                                                enum ieee80211_band band,
1767                                                struct iwl3945_scan_channel *scan_ch)
1768 {
1769         const struct ieee80211_supported_band *sband;
1770         u16 passive_dwell = 0;
1771         u16 active_dwell = 0;
1772         int added = 0;
1773         u8 channel = 0;
1774
1775         sband = iwl_get_hw_mode(priv, band);
1776         if (!sband) {
1777                 IWL_ERR(priv, "invalid band\n");
1778                 return added;
1779         }
1780
1781         active_dwell = iwl_legacy_get_active_dwell_time(priv, band, 0);
1782         passive_dwell = iwl_legacy_get_passive_dwell_time(priv, band, vif);
1783
1784         if (passive_dwell <= active_dwell)
1785                 passive_dwell = active_dwell + 1;
1786
1787
1788         channel = iwl_legacy_get_single_channel_number(priv, band);
1789
1790         if (channel) {
1791                 scan_ch->channel = channel;
1792                 scan_ch->type = 0;      /* passive */
1793                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1794                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1795                 /* Set txpower levels to defaults */
1796                 scan_ch->tpc.dsp_atten = 110;
1797                 if (band == IEEE80211_BAND_5GHZ)
1798                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1799                 else
1800                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1801                 added++;
1802         } else
1803                 IWL_ERR(priv, "no valid channel found\n");
1804         return added;
1805 }
1806
1807 static int iwl3945_get_channels_for_scan(struct iwl_priv *priv,
1808                                          enum ieee80211_band band,
1809                                      u8 is_active, u8 n_probes,
1810                                      struct iwl3945_scan_channel *scan_ch,
1811                                      struct ieee80211_vif *vif)
1812 {
1813         struct ieee80211_channel *chan;
1814         const struct ieee80211_supported_band *sband;
1815         const struct iwl_channel_info *ch_info;
1816         u16 passive_dwell = 0;
1817         u16 active_dwell = 0;
1818         int added, i;
1819
1820         sband = iwl_get_hw_mode(priv, band);
1821         if (!sband)
1822                 return 0;
1823
1824         active_dwell = iwl_legacy_get_active_dwell_time(priv, band, n_probes);
1825         passive_dwell = iwl_legacy_get_passive_dwell_time(priv, band, vif);
1826
1827         if (passive_dwell <= active_dwell)
1828                 passive_dwell = active_dwell + 1;
1829
1830         for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
1831                 chan = priv->scan_request->channels[i];
1832
1833                 if (chan->band != band)
1834                         continue;
1835
1836                 scan_ch->channel = chan->hw_value;
1837
1838                 ch_info = iwl_legacy_get_channel_info(priv, band,
1839                                                         scan_ch->channel);
1840                 if (!iwl_legacy_is_channel_valid(ch_info)) {
1841                         IWL_DEBUG_SCAN(priv,
1842                                 "Channel %d is INVALID for this band.\n",
1843                                scan_ch->channel);
1844                         continue;
1845                 }
1846
1847                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
1848                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
1849                 /* If passive , set up for auto-switch
1850                  *  and use long active_dwell time.
1851                  */
1852                 if (!is_active || iwl_legacy_is_channel_passive(ch_info) ||
1853                     (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) {
1854                         scan_ch->type = 0;      /* passive */
1855                         if (IWL_UCODE_API(priv->ucode_ver) == 1)
1856                                 scan_ch->active_dwell = cpu_to_le16(passive_dwell - 1);
1857                 } else {
1858                         scan_ch->type = 1;      /* active */
1859                 }
1860
1861                 /* Set direct probe bits. These may be used both for active
1862                  * scan channels (probes gets sent right away),
1863                  * or for passive channels (probes get se sent only after
1864                  * hearing clear Rx packet).*/
1865                 if (IWL_UCODE_API(priv->ucode_ver) >= 2) {
1866                         if (n_probes)
1867                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1868                 } else {
1869                         /* uCode v1 does not allow setting direct probe bits on
1870                          * passive channel. */
1871                         if ((scan_ch->type & 1) && n_probes)
1872                                 scan_ch->type |= IWL39_SCAN_PROBE_MASK(n_probes);
1873                 }
1874
1875                 /* Set txpower levels to defaults */
1876                 scan_ch->tpc.dsp_atten = 110;
1877                 /* scan_pwr_info->tpc.dsp_atten; */
1878
1879                 /*scan_pwr_info->tpc.tx_gain; */
1880                 if (band == IEEE80211_BAND_5GHZ)
1881                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
1882                 else {
1883                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
1884                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
1885                          * power level:
1886                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
1887                          */
1888                 }
1889
1890                 IWL_DEBUG_SCAN(priv, "Scanning %d [%s %d]\n",
1891                                scan_ch->channel,
1892                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
1893                                (scan_ch->type & 1) ?
1894                                active_dwell : passive_dwell);
1895
1896                 scan_ch++;
1897                 added++;
1898         }
1899
1900         IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
1901         return added;
1902 }
1903
1904 static void iwl3945_init_hw_rates(struct iwl_priv *priv,
1905                               struct ieee80211_rate *rates)
1906 {
1907         int i;
1908
1909         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1910                 rates[i].bitrate = iwl3945_rates[i].ieee * 5;
1911                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1912                 rates[i].hw_value_short = i;
1913                 rates[i].flags = 0;
1914                 if ((i > IWL39_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
1915                         /*
1916                          * If CCK != 1M then set short preamble rate flag.
1917                          */
1918                         rates[i].flags |= (iwl3945_rates[i].plcp == 10) ?
1919                                 0 : IEEE80211_RATE_SHORT_PREAMBLE;
1920                 }
1921         }
1922 }
1923
1924 /******************************************************************************
1925  *
1926  * uCode download functions
1927  *
1928  ******************************************************************************/
1929
1930 static void iwl3945_dealloc_ucode_pci(struct iwl_priv *priv)
1931 {
1932         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1933         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1934         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1935         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1936         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1937         iwl_legacy_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1938 }
1939
1940 /**
1941  * iwl3945_verify_inst_full - verify runtime uCode image in card vs. host,
1942  *     looking at all data.
1943  */
1944 static int iwl3945_verify_inst_full(struct iwl_priv *priv, __le32 *image, u32 len)
1945 {
1946         u32 val;
1947         u32 save_len = len;
1948         int rc = 0;
1949         u32 errcnt;
1950
1951         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1952
1953         iwl_legacy_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1954                                IWL39_RTC_INST_LOWER_BOUND);
1955
1956         errcnt = 0;
1957         for (; len > 0; len -= sizeof(u32), image++) {
1958                 /* read data comes through single port, auto-incr addr */
1959                 /* NOTE: Use the debugless read so we don't flood kernel log
1960                  * if IWL_DL_IO is set */
1961                 val = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1962                 if (val != le32_to_cpu(*image)) {
1963                         IWL_ERR(priv, "uCode INST section is invalid at "
1964                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1965                                   save_len - len, val, le32_to_cpu(*image));
1966                         rc = -EIO;
1967                         errcnt++;
1968                         if (errcnt >= 20)
1969                                 break;
1970                 }
1971         }
1972
1973
1974         if (!errcnt)
1975                 IWL_DEBUG_INFO(priv,
1976                         "ucode image in INSTRUCTION memory is good\n");
1977
1978         return rc;
1979 }
1980
1981
1982 /**
1983  * iwl3945_verify_inst_sparse - verify runtime uCode image in card vs. host,
1984  *   using sample data 100 bytes apart.  If these sample points are good,
1985  *   it's a pretty good bet that everything between them is good, too.
1986  */
1987 static int iwl3945_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1988 {
1989         u32 val;
1990         int rc = 0;
1991         u32 errcnt = 0;
1992         u32 i;
1993
1994         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1995
1996         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1997                 /* read data comes through single port, auto-incr addr */
1998                 /* NOTE: Use the debugless read so we don't flood kernel log
1999                  * if IWL_DL_IO is set */
2000                 iwl_legacy_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2001                         i + IWL39_RTC_INST_LOWER_BOUND);
2002                 val = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2003                 if (val != le32_to_cpu(*image)) {
2004 #if 0 /* Enable this if you want to see details */
2005                         IWL_ERR(priv, "uCode INST section is invalid at "
2006                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2007                                   i, val, *image);
2008 #endif
2009                         rc = -EIO;
2010                         errcnt++;
2011                         if (errcnt >= 3)
2012                                 break;
2013                 }
2014         }
2015
2016         return rc;
2017 }
2018
2019
2020 /**
2021  * iwl3945_verify_ucode - determine which instruction image is in SRAM,
2022  *    and verify its contents
2023  */
2024 static int iwl3945_verify_ucode(struct iwl_priv *priv)
2025 {
2026         __le32 *image;
2027         u32 len;
2028         int rc = 0;
2029
2030         /* Try bootstrap */
2031         image = (__le32 *)priv->ucode_boot.v_addr;
2032         len = priv->ucode_boot.len;
2033         rc = iwl3945_verify_inst_sparse(priv, image, len);
2034         if (rc == 0) {
2035                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2036                 return 0;
2037         }
2038
2039         /* Try initialize */
2040         image = (__le32 *)priv->ucode_init.v_addr;
2041         len = priv->ucode_init.len;
2042         rc = iwl3945_verify_inst_sparse(priv, image, len);
2043         if (rc == 0) {
2044                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2045                 return 0;
2046         }
2047
2048         /* Try runtime/protocol */
2049         image = (__le32 *)priv->ucode_code.v_addr;
2050         len = priv->ucode_code.len;
2051         rc = iwl3945_verify_inst_sparse(priv, image, len);
2052         if (rc == 0) {
2053                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2054                 return 0;
2055         }
2056
2057         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2058
2059         /* Since nothing seems to match, show first several data entries in
2060          * instruction SRAM, so maybe visual inspection will give a clue.
2061          * Selection of bootstrap image (vs. other images) is arbitrary. */
2062         image = (__le32 *)priv->ucode_boot.v_addr;
2063         len = priv->ucode_boot.len;
2064         rc = iwl3945_verify_inst_full(priv, image, len);
2065
2066         return rc;
2067 }
2068
2069 static void iwl3945_nic_start(struct iwl_priv *priv)
2070 {
2071         /* Remove all resets to allow NIC to operate */
2072         iwl_write32(priv, CSR_RESET, 0);
2073 }
2074
2075 #define IWL3945_UCODE_GET(item)                                         \
2076 static u32 iwl3945_ucode_get_##item(const struct iwl_ucode_header *ucode)\
2077 {                                                                       \
2078         return le32_to_cpu(ucode->v1.item);                             \
2079 }
2080
2081 static u32 iwl3945_ucode_get_header_size(u32 api_ver)
2082 {
2083         return 24;
2084 }
2085
2086 static u8 *iwl3945_ucode_get_data(const struct iwl_ucode_header *ucode)
2087 {
2088         return (u8 *) ucode->v1.data;
2089 }
2090
2091 IWL3945_UCODE_GET(inst_size);
2092 IWL3945_UCODE_GET(data_size);
2093 IWL3945_UCODE_GET(init_size);
2094 IWL3945_UCODE_GET(init_data_size);
2095 IWL3945_UCODE_GET(boot_size);
2096
2097 /**
2098  * iwl3945_read_ucode - Read uCode images from disk file.
2099  *
2100  * Copy into buffers for card to fetch via bus-mastering
2101  */
2102 static int iwl3945_read_ucode(struct iwl_priv *priv)
2103 {
2104         const struct iwl_ucode_header *ucode;
2105         int ret = -EINVAL, index;
2106         const struct firmware *ucode_raw;
2107         /* firmware file name contains uCode/driver compatibility version */
2108         const char *name_pre = priv->cfg->fw_name_pre;
2109         const unsigned int api_max = priv->cfg->ucode_api_max;
2110         const unsigned int api_min = priv->cfg->ucode_api_min;
2111         char buf[25];
2112         u8 *src;
2113         size_t len;
2114         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
2115
2116         /* Ask kernel firmware_class module to get the boot firmware off disk.
2117          * request_firmware() is synchronous, file is in memory on return. */
2118         for (index = api_max; index >= api_min; index--) {
2119                 sprintf(buf, "%s%u%s", name_pre, index, ".ucode");
2120                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
2121                 if (ret < 0) {
2122                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
2123                                   buf, ret);
2124                         if (ret == -ENOENT)
2125                                 continue;
2126                         else
2127                                 goto error;
2128                 } else {
2129                         if (index < api_max)
2130                                 IWL_ERR(priv, "Loaded firmware %s, "
2131                                         "which is deprecated. "
2132                                         " Please use API v%u instead.\n",
2133                                           buf, api_max);
2134                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file "
2135                                        "(%zd bytes) from disk\n",
2136                                        buf, ucode_raw->size);
2137                         break;
2138                 }
2139         }
2140
2141         if (ret < 0)
2142                 goto error;
2143
2144         /* Make sure that we got at least our header! */
2145         if (ucode_raw->size <  iwl3945_ucode_get_header_size(1)) {
2146                 IWL_ERR(priv, "File size way too small!\n");
2147                 ret = -EINVAL;
2148                 goto err_release;
2149         }
2150
2151         /* Data from ucode file:  header followed by uCode images */
2152         ucode = (struct iwl_ucode_header *)ucode_raw->data;
2153
2154         priv->ucode_ver = le32_to_cpu(ucode->ver);
2155         api_ver = IWL_UCODE_API(priv->ucode_ver);
2156         inst_size = iwl3945_ucode_get_inst_size(ucode);
2157         data_size = iwl3945_ucode_get_data_size(ucode);
2158         init_size = iwl3945_ucode_get_init_size(ucode);
2159         init_data_size = iwl3945_ucode_get_init_data_size(ucode);
2160         boot_size = iwl3945_ucode_get_boot_size(ucode);
2161         src = iwl3945_ucode_get_data(ucode);
2162
2163         /* api_ver should match the api version forming part of the
2164          * firmware filename ... but we don't check for that and only rely
2165          * on the API version read from firmware header from here on forward */
2166
2167         if (api_ver < api_min || api_ver > api_max) {
2168                 IWL_ERR(priv, "Driver unable to support your firmware API. "
2169                           "Driver supports v%u, firmware is v%u.\n",
2170                           api_max, api_ver);
2171                 priv->ucode_ver = 0;
2172                 ret = -EINVAL;
2173                 goto err_release;
2174         }
2175         if (api_ver != api_max)
2176                 IWL_ERR(priv, "Firmware has old API version. Expected %u, "
2177                           "got %u. New firmware can be obtained "
2178                           "from http://www.intellinuxwireless.org.\n",
2179                           api_max, api_ver);
2180
2181         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
2182                 IWL_UCODE_MAJOR(priv->ucode_ver),
2183                 IWL_UCODE_MINOR(priv->ucode_ver),
2184                 IWL_UCODE_API(priv->ucode_ver),
2185                 IWL_UCODE_SERIAL(priv->ucode_ver));
2186
2187         snprintf(priv->hw->wiphy->fw_version,
2188                  sizeof(priv->hw->wiphy->fw_version),
2189                  "%u.%u.%u.%u",
2190                  IWL_UCODE_MAJOR(priv->ucode_ver),
2191                  IWL_UCODE_MINOR(priv->ucode_ver),
2192                  IWL_UCODE_API(priv->ucode_ver),
2193                  IWL_UCODE_SERIAL(priv->ucode_ver));
2194
2195         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
2196                        priv->ucode_ver);
2197         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
2198                        inst_size);
2199         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
2200                        data_size);
2201         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
2202                        init_size);
2203         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
2204                        init_data_size);
2205         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
2206                        boot_size);
2207
2208
2209         /* Verify size of file vs. image size info in file's header */
2210         if (ucode_raw->size != iwl3945_ucode_get_header_size(api_ver) +
2211                 inst_size + data_size + init_size +
2212                 init_data_size + boot_size) {
2213
2214                 IWL_DEBUG_INFO(priv,
2215                         "uCode file size %zd does not match expected size\n",
2216                         ucode_raw->size);
2217                 ret = -EINVAL;
2218                 goto err_release;
2219         }
2220
2221         /* Verify that uCode images will fit in card's SRAM */
2222         if (inst_size > IWL39_MAX_INST_SIZE) {
2223                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
2224                                inst_size);
2225                 ret = -EINVAL;
2226                 goto err_release;
2227         }
2228
2229         if (data_size > IWL39_MAX_DATA_SIZE) {
2230                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
2231                                data_size);
2232                 ret = -EINVAL;
2233                 goto err_release;
2234         }
2235         if (init_size > IWL39_MAX_INST_SIZE) {
2236                 IWL_DEBUG_INFO(priv,
2237                                 "uCode init instr len %d too large to fit in\n",
2238                                 init_size);
2239                 ret = -EINVAL;
2240                 goto err_release;
2241         }
2242         if (init_data_size > IWL39_MAX_DATA_SIZE) {
2243                 IWL_DEBUG_INFO(priv,
2244                                 "uCode init data len %d too large to fit in\n",
2245                                 init_data_size);
2246                 ret = -EINVAL;
2247                 goto err_release;
2248         }
2249         if (boot_size > IWL39_MAX_BSM_SIZE) {
2250                 IWL_DEBUG_INFO(priv,
2251                                 "uCode boot instr len %d too large to fit in\n",
2252                                 boot_size);
2253                 ret = -EINVAL;
2254                 goto err_release;
2255         }
2256
2257         /* Allocate ucode buffers for card's bus-master loading ... */
2258
2259         /* Runtime instructions and 2 copies of data:
2260          * 1) unmodified from disk
2261          * 2) backup cache for save/restore during power-downs */
2262         priv->ucode_code.len = inst_size;
2263         iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
2264
2265         priv->ucode_data.len = data_size;
2266         iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
2267
2268         priv->ucode_data_backup.len = data_size;
2269         iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
2270
2271         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
2272             !priv->ucode_data_backup.v_addr)
2273                 goto err_pci_alloc;
2274
2275         /* Initialization instructions and data */
2276         if (init_size && init_data_size) {
2277                 priv->ucode_init.len = init_size;
2278                 iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
2279
2280                 priv->ucode_init_data.len = init_data_size;
2281                 iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
2282
2283                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
2284                         goto err_pci_alloc;
2285         }
2286
2287         /* Bootstrap (instructions only, no data) */
2288         if (boot_size) {
2289                 priv->ucode_boot.len = boot_size;
2290                 iwl_legacy_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
2291
2292                 if (!priv->ucode_boot.v_addr)
2293                         goto err_pci_alloc;
2294         }
2295
2296         /* Copy images into buffers for card's bus-master reads ... */
2297
2298         /* Runtime instructions (first block of data in file) */
2299         len = inst_size;
2300         IWL_DEBUG_INFO(priv,
2301                 "Copying (but not loading) uCode instr len %zd\n", len);
2302         memcpy(priv->ucode_code.v_addr, src, len);
2303         src += len;
2304
2305         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
2306                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
2307
2308         /* Runtime data (2nd block)
2309          * NOTE:  Copy into backup buffer will be done in iwl3945_up()  */
2310         len = data_size;
2311         IWL_DEBUG_INFO(priv,
2312                 "Copying (but not loading) uCode data len %zd\n", len);
2313         memcpy(priv->ucode_data.v_addr, src, len);
2314         memcpy(priv->ucode_data_backup.v_addr, src, len);
2315         src += len;
2316
2317         /* Initialization instructions (3rd block) */
2318         if (init_size) {
2319                 len = init_size;
2320                 IWL_DEBUG_INFO(priv,
2321                         "Copying (but not loading) init instr len %zd\n", len);
2322                 memcpy(priv->ucode_init.v_addr, src, len);
2323                 src += len;
2324         }
2325
2326         /* Initialization data (4th block) */
2327         if (init_data_size) {
2328                 len = init_data_size;
2329                 IWL_DEBUG_INFO(priv,
2330                         "Copying (but not loading) init data len %zd\n", len);
2331                 memcpy(priv->ucode_init_data.v_addr, src, len);
2332                 src += len;
2333         }
2334
2335         /* Bootstrap instructions (5th block) */
2336         len = boot_size;
2337         IWL_DEBUG_INFO(priv,
2338                 "Copying (but not loading) boot instr len %zd\n", len);
2339         memcpy(priv->ucode_boot.v_addr, src, len);
2340
2341         /* We have our copies now, allow OS release its copies */
2342         release_firmware(ucode_raw);
2343         return 0;
2344
2345  err_pci_alloc:
2346         IWL_ERR(priv, "failed to allocate pci memory\n");
2347         ret = -ENOMEM;
2348         iwl3945_dealloc_ucode_pci(priv);
2349
2350  err_release:
2351         release_firmware(ucode_raw);
2352
2353  error:
2354         return ret;
2355 }
2356
2357
2358 /**
2359  * iwl3945_set_ucode_ptrs - Set uCode address location
2360  *
2361  * Tell initialization uCode where to find runtime uCode.
2362  *
2363  * BSM registers initially contain pointers to initialization uCode.
2364  * We need to replace them to load runtime uCode inst and data,
2365  * and to save runtime data when powering down.
2366  */
2367 static int iwl3945_set_ucode_ptrs(struct iwl_priv *priv)
2368 {
2369         dma_addr_t pinst;
2370         dma_addr_t pdata;
2371
2372         /* bits 31:0 for 3945 */
2373         pinst = priv->ucode_code.p_addr;
2374         pdata = priv->ucode_data_backup.p_addr;
2375
2376         /* Tell bootstrap uCode where to find image to load */
2377         iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2378         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2379         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
2380                                  priv->ucode_data.len);
2381
2382         /* Inst byte count must be last to set up, bit 31 signals uCode
2383          *   that all new ptr/size info is in place */
2384         iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
2385                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
2386
2387         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
2388
2389         return 0;
2390 }
2391
2392 /**
2393  * iwl3945_init_alive_start - Called after REPLY_ALIVE notification received
2394  *
2395  * Called after REPLY_ALIVE notification received from "initialize" uCode.
2396  *
2397  * Tell "initialize" uCode to go ahead and load the runtime uCode.
2398  */
2399 static void iwl3945_init_alive_start(struct iwl_priv *priv)
2400 {
2401         /* Check alive response for "valid" sign from uCode */
2402         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
2403                 /* We had an error bringing up the hardware, so take it
2404                  * all the way back down so we can try again */
2405                 IWL_DEBUG_INFO(priv, "Initialize Alive failed.\n");
2406                 goto restart;
2407         }
2408
2409         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
2410          * This is a paranoid check, because we would not have gotten the
2411          * "initialize" alive if code weren't properly loaded.  */
2412         if (iwl3945_verify_ucode(priv)) {
2413                 /* Runtime instruction load was bad;
2414                  * take it all the way back down so we can try again */
2415                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
2416                 goto restart;
2417         }
2418
2419         /* Send pointers to protocol/runtime uCode image ... init code will
2420          * load and launch runtime uCode, which will send us another "Alive"
2421          * notification. */
2422         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
2423         if (iwl3945_set_ucode_ptrs(priv)) {
2424                 /* Runtime instruction load won't happen;
2425                  * take it all the way back down so we can try again */
2426                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
2427                 goto restart;
2428         }
2429         return;
2430
2431  restart:
2432         queue_work(priv->workqueue, &priv->restart);
2433 }
2434
2435 /**
2436  * iwl3945_alive_start - called after REPLY_ALIVE notification received
2437  *                   from protocol/runtime uCode (initialization uCode's
2438  *                   Alive gets handled by iwl3945_init_alive_start()).
2439  */
2440 static void iwl3945_alive_start(struct iwl_priv *priv)
2441 {
2442         int thermal_spin = 0;
2443         u32 rfkill;
2444         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2445
2446         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
2447
2448         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2449                 /* We had an error bringing up the hardware, so take it
2450                  * all the way back down so we can try again */
2451                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
2452                 goto restart;
2453         }
2454
2455         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2456          * This is a paranoid check, because we would not have gotten the
2457          * "runtime" alive if code weren't properly loaded.  */
2458         if (iwl3945_verify_ucode(priv)) {
2459                 /* Runtime instruction load was bad;
2460                  * take it all the way back down so we can try again */
2461                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
2462                 goto restart;
2463         }
2464
2465         rfkill = iwl_legacy_read_prph(priv, APMG_RFKILL_REG);
2466         IWL_DEBUG_INFO(priv, "RFKILL status: 0x%x\n", rfkill);
2467
2468         if (rfkill & 0x1) {
2469                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2470                 /* if RFKILL is not on, then wait for thermal
2471                  * sensor in adapter to kick in */
2472                 while (iwl3945_hw_get_temperature(priv) == 0) {
2473                         thermal_spin++;
2474                         udelay(10);
2475                 }
2476
2477                 if (thermal_spin)
2478                         IWL_DEBUG_INFO(priv, "Thermal calibration took %dus\n",
2479                                        thermal_spin * 10);
2480         } else
2481                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2482
2483         /* After the ALIVE response, we can send commands to 3945 uCode */
2484         set_bit(STATUS_ALIVE, &priv->status);
2485
2486         /* Enable watchdog to monitor the driver tx queues */
2487         iwl_legacy_setup_watchdog(priv);
2488
2489         if (iwl_legacy_is_rfkill(priv))
2490                 return;
2491
2492         ieee80211_wake_queues(priv->hw);
2493
2494         priv->active_rate = IWL_RATES_MASK_3945;
2495
2496         iwl_legacy_power_update_mode(priv, true);
2497
2498         if (iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS)) {
2499                 struct iwl3945_rxon_cmd *active_rxon =
2500                                 (struct iwl3945_rxon_cmd *)(&ctx->active);
2501
2502                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2503                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2504         } else {
2505                 /* Initialize our rx_config data */
2506                 iwl_legacy_connection_init_rx_config(priv, ctx);
2507         }
2508
2509         /* Configure Bluetooth device coexistence support */
2510         iwl_legacy_send_bt_config(priv);
2511
2512         set_bit(STATUS_READY, &priv->status);
2513
2514         /* Configure the adapter for unassociated operation */
2515         iwl3945_commit_rxon(priv, ctx);
2516
2517         iwl3945_reg_txpower_periodic(priv);
2518
2519         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
2520         wake_up_interruptible(&priv->wait_command_queue);
2521
2522         return;
2523
2524  restart:
2525         queue_work(priv->workqueue, &priv->restart);
2526 }
2527
2528 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv);
2529
2530 static void __iwl3945_down(struct iwl_priv *priv)
2531 {
2532         unsigned long flags;
2533         int exit_pending;
2534
2535         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
2536
2537         iwl_legacy_scan_cancel_timeout(priv, 200);
2538
2539         exit_pending = test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
2540
2541         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
2542          * to prevent rearm timer */
2543         del_timer_sync(&priv->watchdog);
2544
2545         /* Station information will now be cleared in device */
2546         iwl_legacy_clear_ucode_stations(priv, NULL);
2547         iwl_legacy_dealloc_bcast_stations(priv);
2548         iwl_legacy_clear_driver_stations(priv);
2549
2550         /* Unblock any waiting calls */
2551         wake_up_interruptible_all(&priv->wait_command_queue);
2552
2553         /* Wipe out the EXIT_PENDING status bit if we are not actually
2554          * exiting the module */
2555         if (!exit_pending)
2556                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2557
2558         /* stop and reset the on-board processor */
2559         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2560
2561         /* tell the device to stop sending interrupts */
2562         spin_lock_irqsave(&priv->lock, flags);
2563         iwl_legacy_disable_interrupts(priv);
2564         spin_unlock_irqrestore(&priv->lock, flags);
2565         iwl3945_synchronize_irq(priv);
2566
2567         if (priv->mac80211_registered)
2568                 ieee80211_stop_queues(priv->hw);
2569
2570         /* If we have not previously called iwl3945_init() then
2571          * clear all bits but the RF Kill bits and return */
2572         if (!iwl_legacy_is_init(priv)) {
2573                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2574                                         STATUS_RF_KILL_HW |
2575                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2576                                         STATUS_GEO_CONFIGURED |
2577                                 test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2578                                         STATUS_EXIT_PENDING;
2579                 goto exit;
2580         }
2581
2582         /* ...otherwise clear out all the status bits but the RF Kill
2583          * bit and continue taking the NIC down. */
2584         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2585                                 STATUS_RF_KILL_HW |
2586                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2587                                 STATUS_GEO_CONFIGURED |
2588                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2589                                 STATUS_FW_ERROR |
2590                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2591                                 STATUS_EXIT_PENDING;
2592
2593         iwl3945_hw_txq_ctx_stop(priv);
2594         iwl3945_hw_rxq_stop(priv);
2595
2596         /* Power-down device's busmaster DMA clocks */
2597         iwl_legacy_write_prph(priv, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
2598         udelay(5);
2599
2600         /* Stop the device, and put it in low power state */
2601         iwl_legacy_apm_stop(priv);
2602
2603  exit:
2604         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2605
2606         if (priv->beacon_skb)
2607                 dev_kfree_skb(priv->beacon_skb);
2608         priv->beacon_skb = NULL;
2609
2610         /* clear out any free frames */
2611         iwl3945_clear_free_frames(priv);
2612 }
2613
2614 static void iwl3945_down(struct iwl_priv *priv)
2615 {
2616         mutex_lock(&priv->mutex);
2617         __iwl3945_down(priv);
2618         mutex_unlock(&priv->mutex);
2619
2620         iwl3945_cancel_deferred_work(priv);
2621 }
2622
2623 #define MAX_HW_RESTARTS 5
2624
2625 static int iwl3945_alloc_bcast_station(struct iwl_priv *priv)
2626 {
2627         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2628         unsigned long flags;
2629         u8 sta_id;
2630
2631         spin_lock_irqsave(&priv->sta_lock, flags);
2632         sta_id = iwl_legacy_prep_station(priv, ctx,
2633                                         iwlegacy_bcast_addr, false, NULL);
2634         if (sta_id == IWL_INVALID_STATION) {
2635                 IWL_ERR(priv, "Unable to prepare broadcast station\n");
2636                 spin_unlock_irqrestore(&priv->sta_lock, flags);
2637
2638                 return -EINVAL;
2639         }
2640
2641         priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
2642         priv->stations[sta_id].used |= IWL_STA_BCAST;
2643         spin_unlock_irqrestore(&priv->sta_lock, flags);
2644
2645         return 0;
2646 }
2647
2648 static int __iwl3945_up(struct iwl_priv *priv)
2649 {
2650         int rc, i;
2651
2652         rc = iwl3945_alloc_bcast_station(priv);
2653         if (rc)
2654                 return rc;
2655
2656         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2657                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
2658                 return -EIO;
2659         }
2660
2661         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2662                 IWL_ERR(priv, "ucode not available for device bring up\n");
2663                 return -EIO;
2664         }
2665
2666         /* If platform's RF_KILL switch is NOT set to KILL */
2667         if (iwl_read32(priv, CSR_GP_CNTRL) &
2668                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2669                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2670         else {
2671                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2672                 IWL_WARN(priv, "Radio disabled by HW RF Kill switch\n");
2673                 return -ENODEV;
2674         }
2675
2676         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2677
2678         rc = iwl3945_hw_nic_init(priv);
2679         if (rc) {
2680                 IWL_ERR(priv, "Unable to int nic\n");
2681                 return rc;
2682         }
2683
2684         /* make sure rfkill handshake bits are cleared */
2685         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2686         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2687                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2688
2689         /* clear (again), then enable host interrupts */
2690         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2691         iwl_legacy_enable_interrupts(priv);
2692
2693         /* really make sure rfkill handshake bits are cleared */
2694         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2695         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2696
2697         /* Copy original ucode data image from disk into backup cache.
2698          * This will be used to initialize the on-board processor's
2699          * data SRAM for a clean start when the runtime program first loads. */
2700         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2701                priv->ucode_data.len);
2702
2703         /* We return success when we resume from suspend and rf_kill is on. */
2704         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
2705                 return 0;
2706
2707         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2708
2709                 /* load bootstrap state machine,
2710                  * load bootstrap program into processor's memory,
2711                  * prepare to load the "initialize" uCode */
2712                 rc = priv->cfg->ops->lib->load_ucode(priv);
2713
2714                 if (rc) {
2715                         IWL_ERR(priv,
2716                                 "Unable to set up bootstrap uCode: %d\n", rc);
2717                         continue;
2718                 }
2719
2720                 /* start card; "initialize" will load runtime ucode */
2721                 iwl3945_nic_start(priv);
2722
2723                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
2724
2725                 return 0;
2726         }
2727
2728         set_bit(STATUS_EXIT_PENDING, &priv->status);
2729         __iwl3945_down(priv);
2730         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2731
2732         /* tried to restart and config the device for as long as our
2733          * patience could withstand */
2734         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
2735         return -EIO;
2736 }
2737
2738
2739 /*****************************************************************************
2740  *
2741  * Workqueue callbacks
2742  *
2743  *****************************************************************************/
2744
2745 static void iwl3945_bg_init_alive_start(struct work_struct *data)
2746 {
2747         struct iwl_priv *priv =
2748             container_of(data, struct iwl_priv, init_alive_start.work);
2749
2750         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2751                 return;
2752
2753         mutex_lock(&priv->mutex);
2754         iwl3945_init_alive_start(priv);
2755         mutex_unlock(&priv->mutex);
2756 }
2757
2758 static void iwl3945_bg_alive_start(struct work_struct *data)
2759 {
2760         struct iwl_priv *priv =
2761             container_of(data, struct iwl_priv, alive_start.work);
2762
2763         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2764                 return;
2765
2766         mutex_lock(&priv->mutex);
2767         iwl3945_alive_start(priv);
2768         mutex_unlock(&priv->mutex);
2769 }
2770
2771 /*
2772  * 3945 cannot interrupt driver when hardware rf kill switch toggles;
2773  * driver must poll CSR_GP_CNTRL_REG register for change.  This register
2774  * *is* readable even when device has been SW_RESET into low power mode
2775  * (e.g. during RF KILL).
2776  */
2777 static void iwl3945_rfkill_poll(struct work_struct *data)
2778 {
2779         struct iwl_priv *priv =
2780             container_of(data, struct iwl_priv, _3945.rfkill_poll.work);
2781         bool old_rfkill = test_bit(STATUS_RF_KILL_HW, &priv->status);
2782         bool new_rfkill = !(iwl_read32(priv, CSR_GP_CNTRL)
2783                         & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW);
2784
2785         if (new_rfkill != old_rfkill) {
2786                 if (new_rfkill)
2787                         set_bit(STATUS_RF_KILL_HW, &priv->status);
2788                 else
2789                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
2790
2791                 wiphy_rfkill_set_hw_state(priv->hw->wiphy, new_rfkill);
2792
2793                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
2794                                 new_rfkill ? "disable radio" : "enable radio");
2795         }
2796
2797         /* Keep this running, even if radio now enabled.  This will be
2798          * cancelled in mac_start() if system decides to start again */
2799         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
2800                            round_jiffies_relative(2 * HZ));
2801
2802 }
2803
2804 int iwl3945_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
2805 {
2806         struct iwl_host_cmd cmd = {
2807                 .id = REPLY_SCAN_CMD,
2808                 .len = sizeof(struct iwl3945_scan_cmd),
2809                 .flags = CMD_SIZE_HUGE,
2810         };
2811         struct iwl3945_scan_cmd *scan;
2812         u8 n_probes = 0;
2813         enum ieee80211_band band;
2814         bool is_active = false;
2815         int ret;
2816
2817         lockdep_assert_held(&priv->mutex);
2818
2819         if (!priv->scan_cmd) {
2820                 priv->scan_cmd = kmalloc(sizeof(struct iwl3945_scan_cmd) +
2821                                          IWL_MAX_SCAN_SIZE, GFP_KERNEL);
2822                 if (!priv->scan_cmd) {
2823                         IWL_DEBUG_SCAN(priv, "Fail to allocate scan memory\n");
2824                         return -ENOMEM;
2825                 }
2826         }
2827         scan = priv->scan_cmd;
2828         memset(scan, 0, sizeof(struct iwl3945_scan_cmd) + IWL_MAX_SCAN_SIZE);
2829
2830         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
2831         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
2832
2833         if (iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS)) {
2834                 u16 interval = 0;
2835                 u32 extra;
2836                 u32 suspend_time = 100;
2837                 u32 scan_suspend_time = 100;
2838
2839                 IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
2840
2841                 if (priv->is_internal_short_scan)
2842                         interval = 0;
2843                 else
2844                         interval = vif->bss_conf.beacon_int;
2845
2846                 scan->suspend_time = 0;
2847                 scan->max_out_time = cpu_to_le32(200 * 1024);
2848                 if (!interval)
2849                         interval = suspend_time;
2850                 /*
2851                  * suspend time format:
2852                  *  0-19: beacon interval in usec (time before exec.)
2853                  * 20-23: 0
2854                  * 24-31: number of beacons (suspend between channels)
2855                  */
2856
2857                 extra = (suspend_time / interval) << 24;
2858                 scan_suspend_time = 0xFF0FFFFF &
2859                     (extra | ((suspend_time % interval) * 1024));
2860
2861                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
2862                 IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
2863                                scan_suspend_time, interval);
2864         }
2865
2866         if (priv->is_internal_short_scan) {
2867                 IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
2868         } else if (priv->scan_request->n_ssids) {
2869                 int i, p = 0;
2870                 IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
2871                 for (i = 0; i < priv->scan_request->n_ssids; i++) {
2872                         /* always does wildcard anyway */
2873                         if (!priv->scan_request->ssids[i].ssid_len)
2874                                 continue;
2875                         scan->direct_scan[p].id = WLAN_EID_SSID;
2876                         scan->direct_scan[p].len =
2877                                 priv->scan_request->ssids[i].ssid_len;
2878                         memcpy(scan->direct_scan[p].ssid,
2879                                priv->scan_request->ssids[i].ssid,
2880                                priv->scan_request->ssids[i].ssid_len);
2881                         n_probes++;
2882                         p++;
2883                 }
2884                 is_active = true;
2885         } else
2886                 IWL_DEBUG_SCAN(priv, "Kicking off passive scan.\n");
2887
2888         /* We don't build a direct scan probe request; the uCode will do
2889          * that based on the direct_mask added to each channel entry */
2890         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
2891         scan->tx_cmd.sta_id = priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
2892         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2893
2894         /* flags + rate selection */
2895
2896         switch (priv->scan_band) {
2897         case IEEE80211_BAND_2GHZ:
2898                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
2899                 scan->tx_cmd.rate = IWL_RATE_1M_PLCP;
2900                 band = IEEE80211_BAND_2GHZ;
2901                 break;
2902         case IEEE80211_BAND_5GHZ:
2903                 scan->tx_cmd.rate = IWL_RATE_6M_PLCP;
2904                 band = IEEE80211_BAND_5GHZ;
2905                 break;
2906         default:
2907                 IWL_WARN(priv, "Invalid scan band\n");
2908                 return -EIO;
2909         }
2910
2911         /*
2912          * If active scaning is requested but a certain channel
2913          * is marked passive, we can do active scanning if we
2914          * detect transmissions.
2915          */
2916         scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
2917                                         IWL_GOOD_CRC_TH_DISABLED;
2918
2919         if (!priv->is_internal_short_scan) {
2920                 scan->tx_cmd.len = cpu_to_le16(
2921                         iwl_legacy_fill_probe_req(priv,
2922                                 (struct ieee80211_mgmt *)scan->data,
2923                                 vif->addr,
2924                                 priv->scan_request->ie,
2925                                 priv->scan_request->ie_len,
2926                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2927         } else {
2928                 /* use bcast addr, will not be transmitted but must be valid */
2929                 scan->tx_cmd.len = cpu_to_le16(
2930                         iwl_legacy_fill_probe_req(priv,
2931                                 (struct ieee80211_mgmt *)scan->data,
2932                                 iwlegacy_bcast_addr, NULL, 0,
2933                                 IWL_MAX_SCAN_SIZE - sizeof(*scan)));
2934         }
2935         /* select Rx antennas */
2936         scan->flags |= iwl3945_get_antenna_flags(priv);
2937
2938         if (priv->is_internal_short_scan) {
2939                 scan->channel_count =
2940                         iwl3945_get_single_channel_for_scan(priv, vif, band,
2941                                 (void *)&scan->data[le16_to_cpu(
2942                                 scan->tx_cmd.len)]);
2943         } else {
2944                 scan->channel_count =
2945                         iwl3945_get_channels_for_scan(priv, band, is_active, n_probes,
2946                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)], vif);
2947         }
2948
2949         if (scan->channel_count == 0) {
2950                 IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
2951                 return -EIO;
2952         }
2953
2954         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
2955             scan->channel_count * sizeof(struct iwl3945_scan_channel);
2956         cmd.data = scan;
2957         scan->len = cpu_to_le16(cmd.len);
2958
2959         set_bit(STATUS_SCAN_HW, &priv->status);
2960         ret = iwl_legacy_send_cmd_sync(priv, &cmd);
2961         if (ret)
2962                 clear_bit(STATUS_SCAN_HW, &priv->status);
2963         return ret;
2964 }
2965
2966 void iwl3945_post_scan(struct iwl_priv *priv)
2967 {
2968         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2969
2970         /*
2971          * Since setting the RXON may have been deferred while
2972          * performing the scan, fire one off if needed
2973          */
2974         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
2975                 iwl3945_commit_rxon(priv, ctx);
2976 }
2977
2978 static void iwl3945_bg_restart(struct work_struct *data)
2979 {
2980         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2981
2982         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2983                 return;
2984
2985         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
2986                 struct iwl_rxon_context *ctx;
2987                 mutex_lock(&priv->mutex);
2988                 for_each_context(priv, ctx)
2989                         ctx->vif = NULL;
2990                 priv->is_open = 0;
2991                 mutex_unlock(&priv->mutex);
2992                 iwl3945_down(priv);
2993                 ieee80211_restart_hw(priv->hw);
2994         } else {
2995                 iwl3945_down(priv);
2996
2997                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2998                         return;
2999
3000                 mutex_lock(&priv->mutex);
3001                 __iwl3945_up(priv);
3002                 mutex_unlock(&priv->mutex);
3003         }
3004 }
3005
3006 static void iwl3945_bg_rx_replenish(struct work_struct *data)
3007 {
3008         struct iwl_priv *priv =
3009             container_of(data, struct iwl_priv, rx_replenish);
3010
3011         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3012                 return;
3013
3014         mutex_lock(&priv->mutex);
3015         iwl3945_rx_replenish(priv);
3016         mutex_unlock(&priv->mutex);
3017 }
3018
3019 void iwl3945_post_associate(struct iwl_priv *priv)
3020 {
3021         int rc = 0;
3022         struct ieee80211_conf *conf = NULL;
3023         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3024
3025         if (!ctx->vif || !priv->is_open)
3026                 return;
3027
3028         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
3029                         ctx->vif->bss_conf.aid, ctx->active.bssid_addr);
3030
3031         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3032                 return;
3033
3034         iwl_legacy_scan_cancel_timeout(priv, 200);
3035
3036         conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
3037
3038         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3039         iwl3945_commit_rxon(priv, ctx);
3040
3041         rc = iwl_legacy_send_rxon_timing(priv, ctx);
3042         if (rc)
3043                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3044                             "Attempting to continue.\n");
3045
3046         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
3047
3048         ctx->staging.assoc_id = cpu_to_le16(ctx->vif->bss_conf.aid);
3049
3050         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
3051                         ctx->vif->bss_conf.aid, ctx->vif->bss_conf.beacon_int);
3052
3053         if (ctx->vif->bss_conf.use_short_preamble)
3054                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3055         else
3056                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3057
3058         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
3059                 if (ctx->vif->bss_conf.use_short_slot)
3060                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3061                 else
3062                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3063         }
3064
3065         iwl3945_commit_rxon(priv, ctx);
3066
3067         switch (ctx->vif->type) {
3068         case NL80211_IFTYPE_STATION:
3069                 iwl3945_rate_scale_init(priv->hw, IWL_AP_ID);
3070                 break;
3071         case NL80211_IFTYPE_ADHOC:
3072                 iwl3945_send_beacon_cmd(priv);
3073                 break;
3074         default:
3075                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
3076                         __func__, ctx->vif->type);
3077                 break;
3078         }
3079 }
3080
3081 /*****************************************************************************
3082  *
3083  * mac80211 entry point functions
3084  *
3085  *****************************************************************************/
3086
3087 #define UCODE_READY_TIMEOUT     (2 * HZ)
3088
3089 static int iwl3945_mac_start(struct ieee80211_hw *hw)
3090 {
3091         struct iwl_priv *priv = hw->priv;
3092         int ret;
3093
3094         IWL_DEBUG_MAC80211(priv, "enter\n");
3095
3096         /* we should be verifying the device is ready to be opened */
3097         mutex_lock(&priv->mutex);
3098
3099         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
3100          * ucode filename and max sizes are card-specific. */
3101
3102         if (!priv->ucode_code.len) {
3103                 ret = iwl3945_read_ucode(priv);
3104                 if (ret) {
3105                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
3106                         mutex_unlock(&priv->mutex);
3107                         goto out_release_irq;
3108                 }
3109         }
3110
3111         ret = __iwl3945_up(priv);
3112
3113         mutex_unlock(&priv->mutex);
3114
3115         if (ret)
3116                 goto out_release_irq;
3117
3118         IWL_DEBUG_INFO(priv, "Start UP work.\n");
3119
3120         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
3121          * mac80211 will not be run successfully. */
3122         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
3123                         test_bit(STATUS_READY, &priv->status),
3124                         UCODE_READY_TIMEOUT);
3125         if (!ret) {
3126                 if (!test_bit(STATUS_READY, &priv->status)) {
3127                         IWL_ERR(priv,
3128                                 "Wait for START_ALIVE timeout after %dms.\n",
3129                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
3130                         ret = -ETIMEDOUT;
3131                         goto out_release_irq;
3132                 }
3133         }
3134
3135         /* ucode is running and will send rfkill notifications,
3136          * no need to poll the killswitch state anymore */
3137         cancel_delayed_work(&priv->_3945.rfkill_poll);
3138
3139         priv->is_open = 1;
3140         IWL_DEBUG_MAC80211(priv, "leave\n");
3141         return 0;
3142
3143 out_release_irq:
3144         priv->is_open = 0;
3145         IWL_DEBUG_MAC80211(priv, "leave - failed\n");
3146         return ret;
3147 }
3148
3149 static void iwl3945_mac_stop(struct ieee80211_hw *hw)
3150 {
3151         struct iwl_priv *priv = hw->priv;
3152
3153         IWL_DEBUG_MAC80211(priv, "enter\n");
3154
3155         if (!priv->is_open) {
3156                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
3157                 return;
3158         }
3159
3160         priv->is_open = 0;
3161
3162         iwl3945_down(priv);
3163
3164         flush_workqueue(priv->workqueue);
3165
3166         /* start polling the killswitch state again */
3167         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
3168                            round_jiffies_relative(2 * HZ));
3169
3170         IWL_DEBUG_MAC80211(priv, "leave\n");
3171 }
3172
3173 static void iwl3945_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
3174 {
3175         struct iwl_priv *priv = hw->priv;
3176
3177         IWL_DEBUG_MAC80211(priv, "enter\n");
3178
3179         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
3180                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
3181
3182         if (iwl3945_tx_skb(priv, skb))
3183                 dev_kfree_skb_any(skb);
3184
3185         IWL_DEBUG_MAC80211(priv, "leave\n");
3186 }
3187
3188 void iwl3945_config_ap(struct iwl_priv *priv)
3189 {
3190         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3191         struct ieee80211_vif *vif = ctx->vif;
3192         int rc = 0;
3193
3194         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3195                 return;
3196
3197         /* The following should be done only at AP bring up */
3198         if (!(iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS))) {
3199
3200                 /* RXON - unassoc (to set timing command) */
3201                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3202                 iwl3945_commit_rxon(priv, ctx);
3203
3204                 /* RXON Timing */
3205                 rc = iwl_legacy_send_rxon_timing(priv, ctx);
3206                 if (rc)
3207                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
3208                                         "Attempting to continue.\n");
3209
3210                 ctx->staging.assoc_id = 0;
3211
3212                 if (vif->bss_conf.use_short_preamble)
3213                         ctx->staging.flags |=
3214                                 RXON_FLG_SHORT_PREAMBLE_MSK;
3215                 else
3216                         ctx->staging.flags &=
3217                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
3218
3219                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
3220                         if (vif->bss_conf.use_short_slot)
3221                                 ctx->staging.flags |=
3222                                         RXON_FLG_SHORT_SLOT_MSK;
3223                         else
3224                                 ctx->staging.flags &=
3225                                         ~RXON_FLG_SHORT_SLOT_MSK;
3226                 }
3227                 /* restore RXON assoc */
3228                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
3229                 iwl3945_commit_rxon(priv, ctx);
3230         }
3231         iwl3945_send_beacon_cmd(priv);
3232 }
3233
3234 static int iwl3945_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3235                                struct ieee80211_vif *vif,
3236                                struct ieee80211_sta *sta,
3237                                struct ieee80211_key_conf *key)
3238 {
3239         struct iwl_priv *priv = hw->priv;
3240         int ret = 0;
3241         u8 sta_id = IWL_INVALID_STATION;
3242         u8 static_key;
3243
3244         IWL_DEBUG_MAC80211(priv, "enter\n");
3245
3246         if (iwl3945_mod_params.sw_crypto) {
3247                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
3248                 return -EOPNOTSUPP;
3249         }
3250
3251         /*
3252          * To support IBSS RSN, don't program group keys in IBSS, the
3253          * hardware will then not attempt to decrypt the frames.
3254          */
3255         if (vif->type == NL80211_IFTYPE_ADHOC &&
3256             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
3257                 return -EOPNOTSUPP;
3258
3259         static_key = !iwl_legacy_is_associated(priv, IWL_RXON_CTX_BSS);
3260
3261         if (!static_key) {
3262                 sta_id = iwl_legacy_sta_id_or_broadcast(
3263                                 priv, &priv->contexts[IWL_RXON_CTX_BSS], sta);
3264                 if (sta_id == IWL_INVALID_STATION)
3265                         return -EINVAL;
3266         }
3267
3268         mutex_lock(&priv->mutex);
3269         iwl_legacy_scan_cancel_timeout(priv, 100);
3270
3271         switch (cmd) {
3272         case SET_KEY:
3273                 if (static_key)
3274                         ret = iwl3945_set_static_key(priv, key);
3275                 else
3276                         ret = iwl3945_set_dynamic_key(priv, key, sta_id);
3277                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
3278                 break;
3279         case DISABLE_KEY:
3280                 if (static_key)
3281                         ret = iwl3945_remove_static_key(priv);
3282                 else
3283                         ret = iwl3945_clear_sta_key_info(priv, sta_id);
3284                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
3285                 break;
3286         default:
3287                 ret = -EINVAL;
3288         }
3289
3290         mutex_unlock(&priv->mutex);
3291         IWL_DEBUG_MAC80211(priv, "leave\n");
3292
3293         return ret;
3294 }
3295
3296 static int iwl3945_mac_sta_add(struct ieee80211_hw *hw,
3297                                struct ieee80211_vif *vif,
3298                                struct ieee80211_sta *sta)
3299 {
3300         struct iwl_priv *priv = hw->priv;
3301         struct iwl3945_sta_priv *sta_priv = (void *)sta->drv_priv;
3302         int ret;
3303         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
3304         u8 sta_id;
3305
3306         IWL_DEBUG_INFO(priv, "received request to add station %pM\n",
3307                         sta->addr);
3308         mutex_lock(&priv->mutex);
3309         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
3310                         sta->addr);
3311         sta_priv->common.sta_id = IWL_INVALID_STATION;
3312
3313
3314         ret = iwl_legacy_add_station_common(priv,
3315                                 &priv->contexts[IWL_RXON_CTX_BSS],
3316                                      sta->addr, is_ap, sta, &sta_id);
3317         if (ret) {
3318                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
3319                         sta->addr, ret);
3320                 /* Should we return success if return code is EEXIST ? */
3321                 mutex_unlock(&priv->mutex);
3322                 return ret;
3323         }
3324
3325         sta_priv->common.sta_id = sta_id;
3326
3327         /* Initialize rate scaling */
3328         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
3329                        sta->addr);
3330         iwl3945_rs_rate_init(priv, sta, sta_id);
3331         mutex_unlock(&priv->mutex);
3332
3333         return 0;
3334 }
3335
3336 static void iwl3945_configure_filter(struct ieee80211_hw *hw,
3337                                      unsigned int changed_flags,
3338                                      unsigned int *total_flags,
3339                                      u64 multicast)
3340 {
3341         struct iwl_priv *priv = hw->priv;
3342         __le32 filter_or = 0, filter_nand = 0;
3343         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3344
3345 #define CHK(test, flag) do { \
3346         if (*total_flags & (test))              \
3347                 filter_or |= (flag);            \
3348         else                                    \
3349                 filter_nand |= (flag);          \
3350         } while (0)
3351
3352         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
3353                         changed_flags, *total_flags);
3354
3355         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
3356         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
3357         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
3358
3359 #undef CHK
3360
3361         mutex_lock(&priv->mutex);
3362
3363         ctx->staging.filter_flags &= ~filter_nand;
3364         ctx->staging.filter_flags |= filter_or;
3365
3366         /*
3367          * Not committing directly because hardware can perform a scan,
3368          * but even if hw is ready, committing here breaks for some reason,
3369          * we'll eventually commit the filter flags change anyway.
3370          */
3371
3372         mutex_unlock(&priv->mutex);
3373
3374         /*
3375          * Receiving all multicast frames is always enabled by the
3376          * default flags setup in iwl_legacy_connection_init_rx_config()
3377          * since we currently do not support programming multicast
3378          * filters into the device.
3379          */
3380         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
3381                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3382 }
3383
3384
3385 /*****************************************************************************
3386  *
3387  * sysfs attributes
3388  *
3389  *****************************************************************************/
3390
3391 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
3392
3393 /*
3394  * The following adds a new attribute to the sysfs representation
3395  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3396  * used for controlling the debug level.
3397  *
3398  * See the level definitions in iwl for details.
3399  *
3400  * The debug_level being managed using sysfs below is a per device debug
3401  * level that is used instead of the global debug level if it (the per
3402  * device debug level) is set.
3403  */
3404 static ssize_t iwl3945_show_debug_level(struct device *d,
3405                                 struct device_attribute *attr, char *buf)
3406 {
3407         struct iwl_priv *priv = dev_get_drvdata(d);
3408         return sprintf(buf, "0x%08X\n", iwl_legacy_get_debug_level(priv));
3409 }
3410 static ssize_t iwl3945_store_debug_level(struct device *d,
3411                                 struct device_attribute *attr,
3412                                  const char *buf, size_t count)
3413 {
3414         struct iwl_priv *priv = dev_get_drvdata(d);
3415         unsigned long val;
3416         int ret;
3417
3418         ret = strict_strtoul(buf, 0, &val);
3419         if (ret)
3420                 IWL_INFO(priv, "%s is not in hex or decimal form.\n", buf);
3421         else {
3422                 priv->debug_level = val;
3423                 if (iwl_legacy_alloc_traffic_mem(priv))
3424                         IWL_ERR(priv,
3425                                 "Not enough memory to generate traffic log\n");
3426         }
3427         return strnlen(buf, count);
3428 }
3429
3430 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3431                         iwl3945_show_debug_level, iwl3945_store_debug_level);
3432
3433 #endif /* CONFIG_IWLWIFI_LEGACY_DEBUG */
3434
3435 static ssize_t iwl3945_show_temperature(struct device *d,
3436                                 struct device_attribute *attr, char *buf)
3437 {
3438         struct iwl_priv *priv = dev_get_drvdata(d);
3439
3440         if (!iwl_legacy_is_alive(priv))
3441                 return -EAGAIN;
3442
3443         return sprintf(buf, "%d\n", iwl3945_hw_get_temperature(priv));
3444 }
3445
3446 static DEVICE_ATTR(temperature, S_IRUGO, iwl3945_show_temperature, NULL);
3447
3448 static ssize_t iwl3945_show_tx_power(struct device *d,
3449                              struct device_attribute *attr, char *buf)
3450 {
3451         struct iwl_priv *priv = dev_get_drvdata(d);
3452         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3453 }
3454
3455 static ssize_t iwl3945_store_tx_power(struct device *d,
3456                               struct device_attribute *attr,
3457                               const char *buf, size_t count)
3458 {
3459         struct iwl_priv *priv = dev_get_drvdata(d);
3460         char *p = (char *)buf;
3461         u32 val;
3462
3463         val = simple_strtoul(p, &p, 10);
3464         if (p == buf)
3465                 IWL_INFO(priv, ": %s is not in decimal form.\n", buf);
3466         else
3467                 iwl3945_hw_reg_set_txpower(priv, val);
3468
3469         return count;
3470 }
3471
3472 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, iwl3945_show_tx_power, iwl3945_store_tx_power);
3473
3474 static ssize_t iwl3945_show_flags(struct device *d,
3475                           struct device_attribute *attr, char *buf)
3476 {
3477         struct iwl_priv *priv = dev_get_drvdata(d);
3478         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3479
3480         return sprintf(buf, "0x%04X\n", ctx->active.flags);
3481 }
3482
3483 static ssize_t iwl3945_store_flags(struct device *d,
3484                            struct device_attribute *attr,
3485                            const char *buf, size_t count)
3486 {
3487         struct iwl_priv *priv = dev_get_drvdata(d);
3488         u32 flags = simple_strtoul(buf, NULL, 0);
3489         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3490
3491         mutex_lock(&priv->mutex);
3492         if (le32_to_cpu(ctx->staging.flags) != flags) {
3493                 /* Cancel any currently running scans... */
3494                 if (iwl_legacy_scan_cancel_timeout(priv, 100))
3495                         IWL_WARN(priv, "Could not cancel scan.\n");
3496                 else {
3497                         IWL_DEBUG_INFO(priv, "Committing rxon.flags = 0x%04X\n",
3498                                        flags);
3499                         ctx->staging.flags = cpu_to_le32(flags);
3500                         iwl3945_commit_rxon(priv, ctx);
3501                 }
3502         }
3503         mutex_unlock(&priv->mutex);
3504
3505         return count;
3506 }
3507
3508 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, iwl3945_show_flags, iwl3945_store_flags);
3509
3510 static ssize_t iwl3945_show_filter_flags(struct device *d,
3511                                  struct device_attribute *attr, char *buf)
3512 {
3513         struct iwl_priv *priv = dev_get_drvdata(d);
3514         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3515
3516         return sprintf(buf, "0x%04X\n",
3517                 le32_to_cpu(ctx->active.filter_flags));
3518 }
3519
3520 static ssize_t iwl3945_store_filter_flags(struct device *d,
3521                                   struct device_attribute *attr,
3522                                   const char *buf, size_t count)
3523 {
3524         struct iwl_priv *priv = dev_get_drvdata(d);
3525         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3526         u32 filter_flags = simple_strtoul(buf, NULL, 0);
3527
3528         mutex_lock(&priv->mutex);
3529         if (le32_to_cpu(ctx->staging.filter_flags) != filter_flags) {
3530                 /* Cancel any currently running scans... */
3531                 if (iwl_legacy_scan_cancel_timeout(priv, 100))
3532                         IWL_WARN(priv, "Could not cancel scan.\n");
3533                 else {
3534                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3535                                        "0x%04X\n", filter_flags);
3536                         ctx->staging.filter_flags =
3537                                 cpu_to_le32(filter_flags);
3538                         iwl3945_commit_rxon(priv, ctx);
3539                 }
3540         }
3541         mutex_unlock(&priv->mutex);
3542
3543         return count;
3544 }
3545
3546 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, iwl3945_show_filter_flags,
3547                    iwl3945_store_filter_flags);
3548
3549 static ssize_t iwl3945_show_measurement(struct device *d,
3550                                 struct device_attribute *attr, char *buf)
3551 {
3552         struct iwl_priv *priv = dev_get_drvdata(d);
3553         struct iwl_spectrum_notification measure_report;
3554         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3555         u8 *data = (u8 *)&measure_report;
3556         unsigned long flags;
3557
3558         spin_lock_irqsave(&priv->lock, flags);
3559         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3560                 spin_unlock_irqrestore(&priv->lock, flags);
3561                 return 0;
3562         }
3563         memcpy(&measure_report, &priv->measure_report, size);
3564         priv->measurement_status = 0;
3565         spin_unlock_irqrestore(&priv->lock, flags);
3566
3567         while (size && (PAGE_SIZE - len)) {
3568                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3569                                    PAGE_SIZE - len, 1);
3570                 len = strlen(buf);
3571                 if (PAGE_SIZE - len)
3572                         buf[len++] = '\n';
3573
3574                 ofs += 16;
3575                 size -= min(size, 16U);
3576         }
3577
3578         return len;
3579 }
3580
3581 static ssize_t iwl3945_store_measurement(struct device *d,
3582                                  struct device_attribute *attr,
3583                                  const char *buf, size_t count)
3584 {
3585         struct iwl_priv *priv = dev_get_drvdata(d);
3586         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
3587         struct ieee80211_measurement_params params = {
3588                 .channel = le16_to_cpu(ctx->active.channel),
3589                 .start_time = cpu_to_le64(priv->_3945.last_tsf),
3590                 .duration = cpu_to_le16(1),
3591         };
3592         u8 type = IWL_MEASURE_BASIC;
3593         u8 buffer[32];
3594         u8 channel;
3595
3596         if (count) {
3597                 char *p = buffer;
3598                 strncpy(buffer, buf, min(sizeof(buffer), count));
3599                 channel = simple_strtoul(p, NULL, 0);
3600                 if (channel)
3601                         params.channel = channel;
3602
3603                 p = buffer;
3604                 while (*p && *p != ' ')
3605                         p++;
3606                 if (*p)
3607                         type = simple_strtoul(p + 1, NULL, 0);
3608         }
3609
3610         IWL_DEBUG_INFO(priv, "Invoking measurement of type %d on "
3611                        "channel %d (for '%s')\n", type, params.channel, buf);
3612         iwl3945_get_measurement(priv, &params, type);
3613
3614         return count;
3615 }
3616
3617 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3618                    iwl3945_show_measurement, iwl3945_store_measurement);
3619
3620 static ssize_t iwl3945_store_retry_rate(struct device *d,
3621                                 struct device_attribute *attr,
3622                                 const char *buf, size_t count)
3623 {
3624         struct iwl_priv *priv = dev_get_drvdata(d);
3625
3626         priv->retry_rate = simple_strtoul(buf, NULL, 0);
3627         if (priv->retry_rate <= 0)
3628                 priv->retry_rate = 1;
3629
3630         return count;
3631 }
3632
3633 static ssize_t iwl3945_show_retry_rate(struct device *d,
3634                                struct device_attribute *attr, char *buf)
3635 {
3636         struct iwl_priv *priv = dev_get_drvdata(d);
3637         return sprintf(buf, "%d", priv->retry_rate);
3638 }
3639
3640 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, iwl3945_show_retry_rate,
3641                    iwl3945_store_retry_rate);
3642
3643
3644 static ssize_t iwl3945_show_channels(struct device *d,
3645                              struct device_attribute *attr, char *buf)
3646 {
3647         /* all this shit doesn't belong into sysfs anyway */
3648         return 0;
3649 }
3650
3651 static DEVICE_ATTR(channels, S_IRUSR, iwl3945_show_channels, NULL);
3652
3653 static ssize_t iwl3945_show_antenna(struct device *d,
3654                             struct device_attribute *attr, char *buf)
3655 {
3656         struct iwl_priv *priv = dev_get_drvdata(d);
3657
3658         if (!iwl_legacy_is_alive(priv))
3659                 return -EAGAIN;
3660
3661         return sprintf(buf, "%d\n", iwl3945_mod_params.antenna);
3662 }
3663
3664 static ssize_t iwl3945_store_antenna(struct device *d,
3665                              struct device_attribute *attr,
3666                              const char *buf, size_t count)
3667 {
3668         struct iwl_priv *priv __maybe_unused = dev_get_drvdata(d);
3669         int ant;
3670
3671         if (count == 0)
3672                 return 0;
3673
3674         if (sscanf(buf, "%1i", &ant) != 1) {
3675                 IWL_DEBUG_INFO(priv, "not in hex or decimal form.\n");
3676                 return count;
3677         }
3678
3679         if ((ant >= 0) && (ant <= 2)) {
3680                 IWL_DEBUG_INFO(priv, "Setting antenna select to %d.\n", ant);
3681                 iwl3945_mod_params.antenna = (enum iwl3945_antenna)ant;
3682         } else
3683                 IWL_DEBUG_INFO(priv, "Bad antenna select value %d.\n", ant);
3684
3685
3686         return count;
3687 }
3688
3689 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, iwl3945_show_antenna, iwl3945_store_antenna);
3690
3691 static ssize_t iwl3945_show_status(struct device *d,
3692                            struct device_attribute *attr, char *buf)
3693 {
3694         struct iwl_priv *priv = dev_get_drvdata(d);
3695         if (!iwl_legacy_is_alive(priv))
3696                 return -EAGAIN;
3697         return sprintf(buf, "0x%08x\n", (int)priv->status);
3698 }
3699
3700 static DEVICE_ATTR(status, S_IRUGO, iwl3945_show_status, NULL);
3701
3702 static ssize_t iwl3945_dump_error_log(struct device *d,
3703                               struct device_attribute *attr,
3704                               const char *buf, size_t count)
3705 {
3706         struct iwl_priv *priv = dev_get_drvdata(d);
3707         char *p = (char *)buf;
3708
3709         if (p[0] == '1')
3710                 iwl3945_dump_nic_error_log(priv);
3711
3712         return strnlen(buf, count);
3713 }
3714
3715 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, iwl3945_dump_error_log);
3716
3717 /*****************************************************************************
3718  *
3719  * driver setup and tear down
3720  *
3721  *****************************************************************************/
3722
3723 static void iwl3945_setup_deferred_work(struct iwl_priv *priv)
3724 {
3725         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3726
3727         init_waitqueue_head(&priv->wait_command_queue);
3728
3729         INIT_WORK(&priv->restart, iwl3945_bg_restart);
3730         INIT_WORK(&priv->rx_replenish, iwl3945_bg_rx_replenish);
3731         INIT_DELAYED_WORK(&priv->init_alive_start, iwl3945_bg_init_alive_start);
3732         INIT_DELAYED_WORK(&priv->alive_start, iwl3945_bg_alive_start);
3733         INIT_DELAYED_WORK(&priv->_3945.rfkill_poll, iwl3945_rfkill_poll);
3734
3735         iwl_legacy_setup_scan_deferred_work(priv);
3736
3737         iwl3945_hw_setup_deferred_work(priv);
3738
3739         init_timer(&priv->watchdog);
3740         priv->watchdog.data = (unsigned long)priv;
3741         priv->watchdog.function = iwl_legacy_bg_watchdog;
3742
3743         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3744                      iwl3945_irq_tasklet, (unsigned long)priv);
3745 }
3746
3747 static void iwl3945_cancel_deferred_work(struct iwl_priv *priv)
3748 {
3749         iwl3945_hw_cancel_deferred_work(priv);
3750
3751         cancel_delayed_work_sync(&priv->init_alive_start);
3752         cancel_delayed_work(&priv->alive_start);
3753
3754         iwl_legacy_cancel_scan_deferred_work(priv);
3755 }
3756
3757 static struct attribute *iwl3945_sysfs_entries[] = {
3758         &dev_attr_antenna.attr,
3759         &dev_attr_channels.attr,
3760         &dev_attr_dump_errors.attr,
3761         &dev_attr_flags.attr,
3762         &dev_attr_filter_flags.attr,
3763         &dev_attr_measurement.attr,
3764         &dev_attr_retry_rate.attr,
3765         &dev_attr_status.attr,
3766         &dev_attr_temperature.attr,
3767         &dev_attr_tx_power.attr,
3768 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
3769         &dev_attr_debug_level.attr,
3770 #endif
3771         NULL
3772 };
3773
3774 static struct attribute_group iwl3945_attribute_group = {
3775         .name = NULL,           /* put in device directory */
3776         .attrs = iwl3945_sysfs_entries,
3777 };
3778
3779 struct ieee80211_ops iwl3945_hw_ops = {
3780         .tx = iwl3945_mac_tx,
3781         .start = iwl3945_mac_start,
3782         .stop = iwl3945_mac_stop,
3783         .add_interface = iwl_legacy_mac_add_interface,
3784         .remove_interface = iwl_legacy_mac_remove_interface,
3785         .change_interface = iwl_legacy_mac_change_interface,
3786         .config = iwl_legacy_mac_config,
3787         .configure_filter = iwl3945_configure_filter,
3788         .set_key = iwl3945_mac_set_key,
3789         .conf_tx = iwl_legacy_mac_conf_tx,
3790         .reset_tsf = iwl_legacy_mac_reset_tsf,
3791         .bss_info_changed = iwl_legacy_mac_bss_info_changed,
3792         .hw_scan = iwl_legacy_mac_hw_scan,
3793         .sta_add = iwl3945_mac_sta_add,
3794         .sta_remove = iwl_legacy_mac_sta_remove,
3795         .tx_last_beacon = iwl_legacy_mac_tx_last_beacon,
3796 };
3797
3798 static int iwl3945_init_drv(struct iwl_priv *priv)
3799 {
3800         int ret;
3801         struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
3802
3803         priv->retry_rate = 1;
3804         priv->beacon_skb = NULL;
3805
3806         spin_lock_init(&priv->sta_lock);
3807         spin_lock_init(&priv->hcmd_lock);
3808
3809         INIT_LIST_HEAD(&priv->free_frames);
3810
3811         mutex_init(&priv->mutex);
3812         mutex_init(&priv->sync_cmd_mutex);
3813
3814         priv->ieee_channels = NULL;
3815         priv->ieee_rates = NULL;
3816         priv->band = IEEE80211_BAND_2GHZ;
3817
3818         priv->iw_mode = NL80211_IFTYPE_STATION;
3819         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
3820
3821         /* initialize force reset */
3822         priv->force_reset[IWL_RF_RESET].reset_duration =
3823                 IWL_DELAY_NEXT_FORCE_RF_RESET;
3824         priv->force_reset[IWL_FW_RESET].reset_duration =
3825                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
3826
3827
3828         priv->tx_power_user_lmt = IWL_DEFAULT_TX_POWER;
3829         priv->tx_power_next = IWL_DEFAULT_TX_POWER;
3830
3831         if (eeprom->version < EEPROM_3945_EEPROM_VERSION) {
3832                 IWL_WARN(priv, "Unsupported EEPROM version: 0x%04X\n",
3833                          eeprom->version);
3834                 ret = -EINVAL;
3835                 goto err;
3836         }
3837         ret = iwl_legacy_init_channel_map(priv);
3838         if (ret) {
3839                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
3840                 goto err;
3841         }
3842
3843         /* Set up txpower settings in driver for all channels */
3844         if (iwl3945_txpower_set_from_eeprom(priv)) {
3845                 ret = -EIO;
3846                 goto err_free_channel_map;
3847         }
3848
3849         ret = iwl_legacy_init_geos(priv);
3850         if (ret) {
3851                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
3852                 goto err_free_channel_map;
3853         }
3854         iwl3945_init_hw_rates(priv, priv->ieee_rates);
3855
3856         return 0;
3857
3858 err_free_channel_map:
3859         iwl_legacy_free_channel_map(priv);
3860 err:
3861         return ret;
3862 }
3863
3864 #define IWL3945_MAX_PROBE_REQUEST       200
3865
3866 static int iwl3945_setup_mac(struct iwl_priv *priv)
3867 {
3868         int ret;
3869         struct ieee80211_hw *hw = priv->hw;
3870
3871         hw->rate_control_algorithm = "iwl-3945-rs";
3872         hw->sta_data_size = sizeof(struct iwl3945_sta_priv);
3873         hw->vif_data_size = sizeof(struct iwl_vif_priv);
3874
3875         /* Tell mac80211 our characteristics */
3876         hw->flags = IEEE80211_HW_SIGNAL_DBM |
3877                     IEEE80211_HW_SPECTRUM_MGMT;
3878
3879         hw->wiphy->interface_modes =
3880                 priv->contexts[IWL_RXON_CTX_BSS].interface_modes;
3881
3882         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
3883                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
3884                             WIPHY_FLAG_IBSS_RSN;
3885
3886         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX_3945;
3887         /* we create the 802.11 header and a zero-length SSID element */
3888         hw->wiphy->max_scan_ie_len = IWL3945_MAX_PROBE_REQUEST - 24 - 2;
3889
3890         /* Default value; 4 EDCA QOS priorities */
3891         hw->queues = 4;
3892
3893         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
3894                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
3895                         &priv->bands[IEEE80211_BAND_2GHZ];
3896
3897         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
3898                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
3899                         &priv->bands[IEEE80211_BAND_5GHZ];
3900
3901         iwl_legacy_leds_init(priv);
3902
3903         ret = ieee80211_register_hw(priv->hw);
3904         if (ret) {
3905                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
3906                 return ret;
3907         }
3908         priv->mac80211_registered = 1;
3909
3910         return 0;
3911 }
3912
3913 static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3914 {
3915         int err = 0, i;
3916         struct iwl_priv *priv;
3917         struct ieee80211_hw *hw;
3918         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3919         struct iwl3945_eeprom *eeprom;
3920         unsigned long flags;
3921
3922         /***********************
3923          * 1. Allocating HW data
3924          * ********************/
3925
3926         /* mac80211 allocates memory for this device instance, including
3927          *   space for this driver's private structure */
3928         hw = iwl_legacy_alloc_all(cfg);
3929         if (hw == NULL) {
3930                 pr_err("Can not allocate network device\n");
3931                 err = -ENOMEM;
3932                 goto out;
3933         }
3934         priv = hw->priv;
3935         SET_IEEE80211_DEV(hw, &pdev->dev);
3936
3937         priv->cmd_queue = IWL39_CMD_QUEUE_NUM;
3938
3939         /* 3945 has only one valid context */
3940         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
3941
3942         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
3943                 priv->contexts[i].ctxid = i;
3944
3945         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
3946         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
3947         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
3948         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
3949         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
3950         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
3951         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
3952                 BIT(NL80211_IFTYPE_STATION) |
3953                 BIT(NL80211_IFTYPE_ADHOC);
3954         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
3955         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
3956         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
3957
3958         /*
3959          * Disabling hardware scan means that mac80211 will perform scans
3960          * "the hard way", rather than using device's scan.
3961          */
3962         if (iwl3945_mod_params.disable_hw_scan) {
3963                 dev_printk(KERN_DEBUG, &(pdev->dev),
3964                         "sw scan support is deprecated\n");
3965                 iwl3945_hw_ops.hw_scan = NULL;
3966         }
3967
3968         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3969         priv->cfg = cfg;
3970         priv->pci_dev = pdev;
3971         priv->inta_mask = CSR_INI_SET_MASK;
3972
3973         if (iwl_legacy_alloc_traffic_mem(priv))
3974                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
3975
3976         /***************************
3977          * 2. Initializing PCI bus
3978          * *************************/
3979         pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
3980                                 PCIE_LINK_STATE_CLKPM);
3981
3982         if (pci_enable_device(pdev)) {
3983                 err = -ENODEV;
3984                 goto out_ieee80211_free_hw;
3985         }
3986
3987         pci_set_master(pdev);
3988
3989         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3990         if (!err)
3991                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3992         if (err) {
3993                 IWL_WARN(priv, "No suitable DMA available.\n");
3994                 goto out_pci_disable_device;
3995         }
3996
3997         pci_set_drvdata(pdev, priv);
3998         err = pci_request_regions(pdev, DRV_NAME);
3999         if (err)
4000                 goto out_pci_disable_device;
4001
4002         /***********************
4003          * 3. Read REV Register
4004          * ********************/
4005         priv->hw_base = pci_iomap(pdev, 0, 0);
4006         if (!priv->hw_base) {
4007                 err = -ENODEV;
4008                 goto out_pci_release_regions;
4009         }
4010
4011         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
4012                         (unsigned long long) pci_resource_len(pdev, 0));
4013         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
4014
4015         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4016          * PCI Tx retries from interfering with C3 CPU state */
4017         pci_write_config_byte(pdev, 0x41, 0x00);
4018
4019         /* these spin locks will be used in apm_ops.init and EEPROM access
4020          * we should init now
4021          */
4022         spin_lock_init(&priv->reg_lock);
4023         spin_lock_init(&priv->lock);
4024
4025         /*
4026          * stop and reset the on-board processor just in case it is in a
4027          * strange state ... like being left stranded by a primary kernel
4028          * and this is now the kdump kernel trying to start up
4029          */
4030         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
4031
4032         /***********************
4033          * 4. Read EEPROM
4034          * ********************/
4035
4036         /* Read the EEPROM */
4037         err = iwl_legacy_eeprom_init(priv);
4038         if (err) {
4039                 IWL_ERR(priv, "Unable to init EEPROM\n");
4040                 goto out_iounmap;
4041         }
4042         /* MAC Address location in EEPROM same for 3945/4965 */
4043         eeprom = (struct iwl3945_eeprom *)priv->eeprom;
4044         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", eeprom->mac_address);
4045         SET_IEEE80211_PERM_ADDR(priv->hw, eeprom->mac_address);
4046
4047         /***********************
4048          * 5. Setup HW Constants
4049          * ********************/
4050         /* Device-specific setup */
4051         if (iwl3945_hw_set_hw_params(priv)) {
4052                 IWL_ERR(priv, "failed to set hw settings\n");
4053                 goto out_eeprom_free;
4054         }
4055
4056         /***********************
4057          * 6. Setup priv
4058          * ********************/
4059
4060         err = iwl3945_init_drv(priv);
4061         if (err) {
4062                 IWL_ERR(priv, "initializing driver failed\n");
4063                 goto out_unset_hw_params;
4064         }
4065
4066         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s\n",
4067                 priv->cfg->name);
4068
4069         /***********************
4070          * 7. Setup Services
4071          * ********************/
4072
4073         spin_lock_irqsave(&priv->lock, flags);
4074         iwl_legacy_disable_interrupts(priv);
4075         spin_unlock_irqrestore(&priv->lock, flags);
4076
4077         pci_enable_msi(priv->pci_dev);
4078
4079         err = request_irq(priv->pci_dev->irq, iwl_legacy_isr,
4080                           IRQF_SHARED, DRV_NAME, priv);
4081         if (err) {
4082                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
4083                 goto out_disable_msi;
4084         }
4085
4086         err = sysfs_create_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4087         if (err) {
4088                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
4089                 goto out_release_irq;
4090         }
4091
4092         iwl_legacy_set_rxon_channel(priv,
4093                              &priv->bands[IEEE80211_BAND_2GHZ].channels[5],
4094                              &priv->contexts[IWL_RXON_CTX_BSS]);
4095         iwl3945_setup_deferred_work(priv);
4096         iwl3945_setup_rx_handlers(priv);
4097         iwl_legacy_power_initialize(priv);
4098
4099         /*********************************
4100          * 8. Setup and Register mac80211
4101          * *******************************/
4102
4103         iwl_legacy_enable_interrupts(priv);
4104
4105         err = iwl3945_setup_mac(priv);
4106         if (err)
4107                 goto  out_remove_sysfs;
4108
4109         err = iwl_legacy_dbgfs_register(priv, DRV_NAME);
4110         if (err)
4111                 IWL_ERR(priv, "failed to create debugfs files. Ignoring error: %d\n", err);
4112
4113         /* Start monitoring the killswitch */
4114         queue_delayed_work(priv->workqueue, &priv->_3945.rfkill_poll,
4115                            2 * HZ);
4116
4117         return 0;
4118
4119  out_remove_sysfs:
4120         destroy_workqueue(priv->workqueue);
4121         priv->workqueue = NULL;
4122         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4123  out_release_irq:
4124         free_irq(priv->pci_dev->irq, priv);
4125  out_disable_msi:
4126         pci_disable_msi(priv->pci_dev);
4127         iwl_legacy_free_geos(priv);
4128         iwl_legacy_free_channel_map(priv);
4129  out_unset_hw_params:
4130         iwl3945_unset_hw_params(priv);
4131  out_eeprom_free:
4132         iwl_legacy_eeprom_free(priv);
4133  out_iounmap:
4134         pci_iounmap(pdev, priv->hw_base);
4135  out_pci_release_regions:
4136         pci_release_regions(pdev);
4137  out_pci_disable_device:
4138         pci_set_drvdata(pdev, NULL);
4139         pci_disable_device(pdev);
4140  out_ieee80211_free_hw:
4141         iwl_legacy_free_traffic_mem(priv);
4142         ieee80211_free_hw(priv->hw);
4143  out:
4144         return err;
4145 }
4146
4147 static void __devexit iwl3945_pci_remove(struct pci_dev *pdev)
4148 {
4149         struct iwl_priv *priv = pci_get_drvdata(pdev);
4150         unsigned long flags;
4151
4152         if (!priv)
4153                 return;
4154
4155         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
4156
4157         iwl_legacy_dbgfs_unregister(priv);
4158
4159         set_bit(STATUS_EXIT_PENDING, &priv->status);
4160
4161         iwl_legacy_leds_exit(priv);
4162
4163         if (priv->mac80211_registered) {
4164                 ieee80211_unregister_hw(priv->hw);
4165                 priv->mac80211_registered = 0;
4166         } else {
4167                 iwl3945_down(priv);
4168         }
4169
4170         /*
4171          * Make sure device is reset to low power before unloading driver.
4172          * This may be redundant with iwl_down(), but there are paths to
4173          * run iwl_down() without calling apm_ops.stop(), and there are
4174          * paths to avoid running iwl_down() at all before leaving driver.
4175          * This (inexpensive) call *makes sure* device is reset.
4176          */
4177         iwl_legacy_apm_stop(priv);
4178
4179         /* make sure we flush any pending irq or
4180          * tasklet for the driver
4181          */
4182         spin_lock_irqsave(&priv->lock, flags);
4183         iwl_legacy_disable_interrupts(priv);
4184         spin_unlock_irqrestore(&priv->lock, flags);
4185
4186         iwl3945_synchronize_irq(priv);
4187
4188         sysfs_remove_group(&pdev->dev.kobj, &iwl3945_attribute_group);
4189
4190         cancel_delayed_work_sync(&priv->_3945.rfkill_poll);
4191
4192         iwl3945_dealloc_ucode_pci(priv);
4193
4194         if (priv->rxq.bd)
4195                 iwl3945_rx_queue_free(priv, &priv->rxq);
4196         iwl3945_hw_txq_ctx_free(priv);
4197
4198         iwl3945_unset_hw_params(priv);
4199
4200         /*netif_stop_queue(dev); */
4201         flush_workqueue(priv->workqueue);
4202
4203         /* ieee80211_unregister_hw calls iwl3945_mac_stop, which flushes
4204          * priv->workqueue... so we can't take down the workqueue
4205          * until now... */
4206         destroy_workqueue(priv->workqueue);
4207         priv->workqueue = NULL;
4208         iwl_legacy_free_traffic_mem(priv);
4209
4210         free_irq(pdev->irq, priv);
4211         pci_disable_msi(pdev);
4212
4213         pci_iounmap(pdev, priv->hw_base);
4214         pci_release_regions(pdev);
4215         pci_disable_device(pdev);
4216         pci_set_drvdata(pdev, NULL);
4217
4218         iwl_legacy_free_channel_map(priv);
4219         iwl_legacy_free_geos(priv);
4220         kfree(priv->scan_cmd);
4221         if (priv->beacon_skb)
4222                 dev_kfree_skb(priv->beacon_skb);
4223
4224         ieee80211_free_hw(priv->hw);
4225 }
4226
4227
4228 /*****************************************************************************
4229  *
4230  * driver and module entry point
4231  *
4232  *****************************************************************************/
4233
4234 static struct pci_driver iwl3945_driver = {
4235         .name = DRV_NAME,
4236         .id_table = iwl3945_hw_card_ids,
4237         .probe = iwl3945_pci_probe,
4238         .remove = __devexit_p(iwl3945_pci_remove),
4239         .driver.pm = IWL_LEGACY_PM_OPS,
4240 };
4241
4242 static int __init iwl3945_init(void)
4243 {
4244
4245         int ret;
4246         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
4247         pr_info(DRV_COPYRIGHT "\n");
4248
4249         ret = iwl3945_rate_control_register();
4250         if (ret) {
4251                 pr_err("Unable to register rate control algorithm: %d\n", ret);
4252                 return ret;
4253         }
4254
4255         ret = pci_register_driver(&iwl3945_driver);
4256         if (ret) {
4257                 pr_err("Unable to initialize PCI module\n");
4258                 goto error_register;
4259         }
4260
4261         return ret;
4262
4263 error_register:
4264         iwl3945_rate_control_unregister();
4265         return ret;
4266 }
4267
4268 static void __exit iwl3945_exit(void)
4269 {
4270         pci_unregister_driver(&iwl3945_driver);
4271         iwl3945_rate_control_unregister();
4272 }
4273
4274 MODULE_FIRMWARE(IWL3945_MODULE_FIRMWARE(IWL3945_UCODE_API_MAX));
4275
4276 module_param_named(antenna, iwl3945_mod_params.antenna, int, S_IRUGO);
4277 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4278 module_param_named(swcrypto, iwl3945_mod_params.sw_crypto, int, S_IRUGO);
4279 MODULE_PARM_DESC(swcrypto,
4280                 "using software crypto (default 1 [software])");
4281 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
4282                 int, S_IRUGO);
4283 MODULE_PARM_DESC(disable_hw_scan,
4284                 "disable hardware scanning (default 0) (deprecated)");
4285 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
4286 module_param_named(debug, iwlegacy_debug_level, uint, S_IRUGO | S_IWUSR);
4287 MODULE_PARM_DESC(debug, "debug output mask");
4288 #endif
4289 module_param_named(fw_restart, iwl3945_mod_params.restart_fw, int, S_IRUGO);
4290 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
4291
4292 module_exit(iwl3945_exit);
4293 module_init(iwl3945_init);