drivers/net/wireless/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 100
 217 irqreturn_t wl1251_irq(int irq, void *cookie)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl = cookie;
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 304                         wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 while (skb_queue_len(&wl->tx_queue) > 0
 312                        && wl1251_tx_path_status(wl) == 0) {
 313
 314                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
 315                         if (skb == NULL)
 316                                 goto out_sleep;
 317
 318                         ret = wl1251_tx_frame(wl, skb);
 319                         if (ret == -EBUSY) {
 320                                 skb_queue_head(&wl->tx_queue, skb);
 321                                 break;
 322                         } else if (ret < 0) {
 323                                 dev_kfree_skb(skb);
 324                         }
 325                 }
 326
 327                 if (--ctr == 0)
 328                         break;
 329
 330                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 331         } while (intr);
 332
 333 out_sleep:
 334         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 335         wl1251_ps_elp_sleep(wl);
 336
 337 out:
 338         mutex_unlock(&wl->mutex);
 339         return IRQ_HANDLED;
 340 }
 341 EXPORT_SYMBOL_GPL(wl1251_irq);
 342
 343 static void wl1251_irq_work(struct work_struct *work)
 344 {
 345         struct wl1251 *wl =
 346                 container_of(work, struct wl1251, irq_work);
 347
 348         wl1251_irq(0, wl);
 349 }
 350
 351 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 352                        u16 beacon_interval, u8 dtim_period)
 353 {
 354         int ret;
 355
 356         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 357                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 358                                      wl->tx_mgmt_frm_rate,
 359                                      wl->tx_mgmt_frm_mod);
 360         if (ret < 0)
 361                 goto out;
 362
 363         /*
 364          * Join command applies filters, and if we are not associated,
 365          * BSSID filter must be disabled for association to work.
 366          */
 367         if (is_zero_ether_addr(wl->bssid))
 368                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 369
 370         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 371                               dtim_period);
 372         if (ret < 0)
 373                 goto out;
 374
 375         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 376         if (ret < 0)
 377                 wl1251_warning("join timeout");
 378
 379 out:
 380         return ret;
 381 }
 382
 383 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 384 {
 385         struct wl1251 *wl = hw->priv;
 386         unsigned long flags;
 387
 388         skb_queue_tail(&wl->tx_queue, skb);
 389
 390         /*
 391          * The chip specific setup must run before the first TX packet -
 392          * before that, the tx_work will not be initialized!
 393          */
 394
 395         ieee80211_queue_work(wl->hw, &wl->tx_work);
 396
 397         /*
 398          * The workqueue is slow to process the tx_queue and we need stop
 399          * the queue here, otherwise the queue will get too long.
 400          */
 401         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 402                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 403
 404                 spin_lock_irqsave(&wl->wl_lock, flags);
 405                 ieee80211_stop_queues(wl->hw);
 406                 wl->tx_queue_stopped = true;
 407                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 408         }
 409 }
 410
 411 static int wl1251_op_start(struct ieee80211_hw *hw)
 412 {
 413         struct wl1251 *wl = hw->priv;
 414         struct wiphy *wiphy = hw->wiphy;
 415         int ret = 0;
 416
 417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 418
 419         mutex_lock(&wl->mutex);
 420
 421         if (wl->state != WL1251_STATE_OFF) {
 422                 wl1251_error("cannot start because not in off state: %d",
 423                              wl->state);
 424                 ret = -EBUSY;
 425                 goto out;
 426         }
 427
 428         ret = wl1251_chip_wakeup(wl);
 429         if (ret < 0)
 430                 goto out;
 431
 432         ret = wl1251_boot(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_hw_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_acx_station_id(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         wl->state = WL1251_STATE_ON;
 445
 446         wl1251_info("firmware booted (%s)", wl->fw_ver);
 447
 448         /* update hw/fw version info in wiphy struct */
 449         wiphy->hw_version = wl->chip_id;
 450         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 451
 452 out:
 453         if (ret < 0)
 454                 wl1251_power_off(wl);
 455
 456         mutex_unlock(&wl->mutex);
 457
 458         return ret;
 459 }
 460
 461 static void wl1251_op_stop(struct ieee80211_hw *hw)
 462 {
 463         struct wl1251 *wl = hw->priv;
 464
 465         wl1251_info("down");
 466
 467         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 468
 469         mutex_lock(&wl->mutex);
 470
 471         WARN_ON(wl->state != WL1251_STATE_ON);
 472
 473         if (wl->scanning) {
 474                 ieee80211_scan_completed(wl->hw, true);
 475                 wl->scanning = false;
 476         }
 477
 478         wl->state = WL1251_STATE_OFF;
 479
 480         wl1251_disable_interrupts(wl);
 481
 482         mutex_unlock(&wl->mutex);
 483
 484         cancel_work_sync(&wl->irq_work);
 485         cancel_work_sync(&wl->tx_work);
 486         cancel_delayed_work_sync(&wl->ps_work);
 487         cancel_delayed_work_sync(&wl->elp_work);
 488
 489         mutex_lock(&wl->mutex);
 490
 491         /* let's notify MAC80211 about the remaining pending TX frames */
 492         wl1251_tx_flush(wl);
 493         wl1251_power_off(wl);
 494
 495         memset(wl->bssid, 0, ETH_ALEN);
 496         wl->listen_int = 1;
 497         wl->bss_type = MAX_BSS_TYPE;
 498
 499         wl->data_in_count = 0;
 500         wl->rx_counter = 0;
 501         wl->rx_handled = 0;
 502         wl->rx_current_buffer = 0;
 503         wl->rx_last_id = 0;
 504         wl->next_tx_complete = 0;
 505         wl->elp = false;
 506         wl->station_mode = STATION_ACTIVE_MODE;
 507         wl->tx_queue_stopped = false;
 508         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 509         wl->rssi_thold = 0;
 510         wl->channel = WL1251_DEFAULT_CHANNEL;
 511         wl->monitor_present = false;
 512         wl->joined = false;
 513
 514         wl1251_debugfs_reset(wl);
 515
 516         mutex_unlock(&wl->mutex);
 517 }
 518
 519 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 520                                    struct ieee80211_vif *vif)
 521 {
 522         struct wl1251 *wl = hw->priv;
 523         int ret = 0;
 524
 525         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 526                      vif->type, vif->addr);
 527
 528         mutex_lock(&wl->mutex);
 529         if (wl->vif) {
 530                 ret = -EBUSY;
 531                 goto out;
 532         }
 533
 534         wl->vif = vif;
 535
 536         switch (vif->type) {
 537         case NL80211_IFTYPE_STATION:
 538                 wl->bss_type = BSS_TYPE_STA_BSS;
 539                 break;
 540         case NL80211_IFTYPE_ADHOC:
 541                 wl->bss_type = BSS_TYPE_IBSS;
 542                 break;
 543         default:
 544                 ret = -EOPNOTSUPP;
 545                 goto out;
 546         }
 547
 548         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 549                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 550                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 551                 ret = wl1251_acx_station_id(wl);
 552                 if (ret < 0)
 553                         goto out;
 554         }
 555
 556 out:
 557         mutex_unlock(&wl->mutex);
 558         return ret;
 559 }
 560
 561 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 562                                          struct ieee80211_vif *vif)
 563 {
 564         struct wl1251 *wl = hw->priv;
 565
 566         mutex_lock(&wl->mutex);
 567         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 568         wl->vif = NULL;
 569         memset(wl->bssid, 0, ETH_ALEN);
 570         mutex_unlock(&wl->mutex);
 571 }
 572
 573 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 574 {
 575         struct ieee80211_qos_hdr template;
 576
 577         memset(&template, 0, sizeof(template));
 578
 579         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 580         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 581         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 582
 583         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 584                                              IEEE80211_STYPE_QOS_NULLFUNC |
 585                                              IEEE80211_FCTL_TODS);
 586
 587         /* FIXME: not sure what priority to use here */
 588         template.qos_ctrl = cpu_to_le16(0);
 589
 590         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 591                                        sizeof(template));
 592 }
 593
 594 static void wl1251_ps_work(struct work_struct *work)
 595 {
 596         struct delayed_work *dwork;
 597         struct wl1251 *wl;
 598         unsigned long diff, wait;
 599         bool need_ps;
 600         bool have_ps;
 601         int ret;
 602         int i;
 603
 604         dwork = container_of(work, struct delayed_work, work);
 605         wl = container_of(dwork, struct wl1251, ps_work);
 606
 607         mutex_lock(&wl->mutex);
 608
 609         /* don't change PS modes while still transitioning, to avoid possbile
 610          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 611         if (wl->ps_transitioning) {
 612                 diff = jiffies - wl->ps_change_jiffies;
 613                 if (diff > msecs_to_jiffies(500)) {
 614                         wl1251_error("PS change taking too long: %lu", diff);
 615                         wl->ps_transitioning = false;
 616                 } else {
 617                         //wl1251_error("PS still transitioning");
 618                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 619                                 msecs_to_jiffies(50));
 620                         goto out;
 621                 }
 622         }
 623
 624         need_ps = wl->psm_requested && !wl->bss_lost;
 625         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 626
 627         if (need_ps == have_ps) {
 628                 //wl1251_info("ps: already in mode %d", have_ps);
 629                 goto out;
 630         }
 631
 632         /* don't enter PS if there was recent activity */
 633         if (need_ps) {
 634                 wait = 0;
 635
 636                 diff = jiffies - wl->last_io_jiffies;
 637                 if (diff < msecs_to_jiffies(150)) {
 638                         //wl1251_info("ps: postponed psm, j %ld", diff);
 639                         wait = msecs_to_jiffies(150) - diff + 1;
 640                 }
 641
 642                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 643                         if (wl->tx_frames[i] != NULL) {
 644                                 //wl1251_error("  frm %d busy", i);
 645                                 if (wait < msecs_to_jiffies(50))
 646                                         wait = msecs_to_jiffies(50);
 647                                 break;
 648                         }
 649                 }
 650
 651                 if (wait > 0) {
 652                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 653                         goto out;
 654                 }
 655         }
 656
 657         ret = wl1251_ps_elp_wakeup(wl);
 658         if (ret < 0)
 659                 goto out;
 660
 661         if (need_ps) {
 662                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 663                                             wl->dtim_period);
 664         }
 665         ret = wl1251_ps_set_mode(wl,
 666                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 667         if (ret < 0)
 668                 goto out_sleep;
 669
 670         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 671         //      jiffies - wl->last_io_jiffies);
 672
 673 out_sleep:
 674         wl1251_ps_elp_sleep(wl);
 675
 676 out:
 677         mutex_unlock(&wl->mutex);
 678 }
 679
 680 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 681 {
 682         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 683 }
 684
 685 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 686 {
 687         struct wl1251 *wl = hw->priv;
 688         struct ieee80211_conf *conf = &hw->conf;
 689         int channel, ret = 0;
 690
 691         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 692
 693         wl1251_debug(DEBUG_MAC80211,
 694                      "mac80211 config ch %d monitor %s psm %s power %d",
 695                      channel,
 696                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 697                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 698                      conf->power_level);
 699
 700         mutex_lock(&wl->mutex);
 701
 702         ret = wl1251_ps_elp_wakeup(wl);
 703         if (ret < 0)
 704                 goto out;
 705
 706         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 707                 u32 mode;
 708
 709                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 710                         wl->monitor_present = true;
 711                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 712                 } else {
 713                         wl->monitor_present = false;
 714                         mode = 0;
 715                 }
 716
 717                 ret = wl1251_acx_feature_cfg(wl, mode);
 718                 if (ret < 0)
 719                         goto out_sleep;
 720         }
 721
 722         if (channel != wl->channel) {
 723                 wl->channel = channel;
 724
 725                 /*
 726                  * Use ENABLE_RX command for channel switching when no
 727                  * interface is present (monitor mode only).
 728                  * This leaves the tx path disabled in firmware, whereas
 729                  * the usual JOIN command seems to transmit some frames
 730                  * at firmware level.
 731                  */
 732                 if (wl->vif == NULL) {
 733                         wl->joined = false;
 734                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 735                 } else {
 736                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 737                                           wl->beacon_int, wl->dtim_period);
 738                 }
 739                 if (ret < 0)
 740                         goto out_sleep;
 741         }
 742
 743         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 744                 wl1251_debug(DEBUG_PSM, "psm enabled");
 745
 746                 wl->psm_requested = true;
 747
 748                 wl->dtim_period = conf->ps_dtim_period;
 749
 750                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 751         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 752                 wl1251_debug(DEBUG_PSM, "psm disabled");
 753
 754                 wl->psm_requested = false;
 755
 756                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 757         }
 758
 759         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 760                 if (conf->flags & IEEE80211_CONF_IDLE) {
 761                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 762                         if (ret < 0)
 763                                 goto out_sleep;
 764                 } else {
 765                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 766                         if (ret < 0)
 767                                 goto out_sleep;
 768
 769                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 770                         if (ret < 0)
 771                                 wl1251_error("error waiting for wakeup");
 772
 773                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 774                                           wl->beacon_int, wl->dtim_period);
 775                         if (ret < 0)
 776                                 goto out_sleep;
 777                 }
 778         }
 779
 780         if (conf->power_level != wl->power_level) {
 781                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 782                 if (ret < 0)
 783                         goto out_sleep;
 784
 785                 wl->power_level = conf->power_level;
 786         }
 787
 788         /*
 789          * Tell stack that connection is lost because hw encryption isn't
 790          * supported in monitor mode.
 791          * This requires temporary enabling of the hw connection monitor flag
 792          */
 793         if ((changed & IEEE80211_CONF_CHANGE_MONITOR) && wl->vif) {
 794                 wl->hw->flags |= IEEE80211_HW_CONNECTION_MONITOR;
 795                 ieee80211_connection_loss(wl->vif);
 796         }
 797
 798 out_sleep:
 799         wl1251_ps_elp_sleep(wl);
 800
 801 out:
 802         mutex_unlock(&wl->mutex);
 803
 804         return ret;
 805 }
 806
 807 struct wl1251_filter_params {
 808         bool enabled;
 809         int mc_list_length;
 810         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 811 };
 812
 813 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 814                                        struct netdev_hw_addr_list *mc_list)
 815 {
 816         struct wl1251_filter_params *fp;
 817         struct netdev_hw_addr *ha;
 818         struct wl1251 *wl = hw->priv;
 819
 820         if (unlikely(wl->state == WL1251_STATE_OFF))
 821                 return 0;
 822
 823         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 824         if (!fp) {
 825                 wl1251_error("Out of memory setting filters.");
 826                 return 0;
 827         }
 828
 829         /* update multicast filtering parameters */
 830         fp->mc_list_length = 0;
 831         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 832                 fp->enabled = false;
 833         } else {
 834                 fp->enabled = true;
 835                 netdev_hw_addr_list_for_each(ha, mc_list) {
 836                         memcpy(fp->mc_list[fp->mc_list_length],
 837                                         ha->addr, ETH_ALEN);
 838                         fp->mc_list_length++;
 839                 }
 840         }
 841
 842         return (u64)(unsigned long)fp;
 843 }
 844
 845 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 846                                   FIF_ALLMULTI | \
 847                                   FIF_FCSFAIL | \
 848                                   FIF_BCN_PRBRESP_PROMISC | \
 849                                   FIF_CONTROL | \
 850                                   FIF_OTHER_BSS | \
 851                                   FIF_PROBE_REQ)
 852
 853 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 854                                        unsigned int changed,
 855                                        unsigned int *total, u64 multicast)
 856 {
 857         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 858         struct wl1251 *wl = hw->priv;
 859         int ret;
 860
 861         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 862
 863         *total &= WL1251_SUPPORTED_FILTERS;
 864         changed &= WL1251_SUPPORTED_FILTERS;
 865
 866         if (changed == 0) {
 867                 /* no filters which we support changed */
 868                 kfree(fp);
 869                 return;
 870         }
 871
 872         mutex_lock(&wl->mutex);
 873
 874         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 875         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 876
 877         if (*total & FIF_PROMISC_IN_BSS) {
 878                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 879                 wl->rx_config |= CFG_RX_ALL_GOOD;
 880         }
 881         if (*total & FIF_ALLMULTI)
 882                 /*
 883                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 884                  * all multicast frames
 885                  */
 886                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 887         if (*total & FIF_FCSFAIL)
 888                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 889         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 890                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 891                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 892         }
 893         if (*total & FIF_CONTROL)
 894                 wl->rx_filter |= CFG_RX_CTL_EN;
 895         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 896                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 897         if (*total & FIF_PROBE_REQ)
 898                 wl->rx_filter |= CFG_RX_PREQ_EN;
 899
 900         if (wl->state == WL1251_STATE_OFF)
 901                 goto out;
 902
 903         ret = wl1251_ps_elp_wakeup(wl);
 904         if (ret < 0)
 905                 goto out;
 906
 907         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 908                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 909         else if (fp)
 910                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 911                                                    fp->mc_list,
 912                                                    fp->mc_list_length);
 913         if (ret < 0)
 914                 goto out;
 915
 916         /* send filters to firmware */
 917         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 918
 919         wl1251_ps_elp_sleep(wl);
 920
 921 out:
 922         mutex_unlock(&wl->mutex);
 923         kfree(fp);
 924 }
 925
 926 /* HW encryption */
 927 static int wl1251_set_key_type(struct wl1251 *wl,
 928                                struct wl1251_cmd_set_keys *key,
 929                                enum set_key_cmd cmd,
 930                                struct ieee80211_key_conf *mac80211_key,
 931                                const u8 *addr)
 932 {
 933         switch (mac80211_key->cipher) {
 934         case WLAN_CIPHER_SUITE_WEP40:
 935         case WLAN_CIPHER_SUITE_WEP104:
 936                 if (is_broadcast_ether_addr(addr))
 937                         key->key_type = KEY_WEP_DEFAULT;
 938                 else
 939                         key->key_type = KEY_WEP_ADDR;
 940
 941                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 942                 break;
 943         case WLAN_CIPHER_SUITE_TKIP:
 944                 if (is_broadcast_ether_addr(addr))
 945                         key->key_type = KEY_TKIP_MIC_GROUP;
 946                 else
 947                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 948
 949                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 950                 break;
 951         case WLAN_CIPHER_SUITE_CCMP:
 952                 if (is_broadcast_ether_addr(addr))
 953                         key->key_type = KEY_AES_GROUP;
 954                 else
 955                         key->key_type = KEY_AES_PAIRWISE;
 956                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 957                 break;
 958         default:
 959                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 960                 return -EOPNOTSUPP;
 961         }
 962
 963         return 0;
 964 }
 965
 966 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 967                              struct ieee80211_vif *vif,
 968                              struct ieee80211_sta *sta,
 969                              struct ieee80211_key_conf *key)
 970 {
 971         struct wl1251 *wl = hw->priv;
 972         struct wl1251_cmd_set_keys *wl_cmd;
 973         const u8 *addr;
 974         int ret;
 975
 976         static const u8 bcast_addr[ETH_ALEN] =
 977                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 978
 979         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 980
 981         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 982         if (!wl_cmd) {
 983                 ret = -ENOMEM;
 984                 goto out;
 985         }
 986
 987         addr = sta ? sta->addr : bcast_addr;
 988
 989         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 990         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 991         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 992                      key->cipher, key->keyidx, key->keylen, key->flags);
 993         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 994
 995         if (is_zero_ether_addr(addr)) {
 996                 /* We dont support TX only encryption */
 997                 ret = -EOPNOTSUPP;
 998                 goto out;
 999         }
1000
1001         mutex_lock(&wl->mutex);
1002
1003         switch (cmd) {
1004         case SET_KEY:
1005                 if (wl->monitor_present) {
1006                         ret = -EOPNOTSUPP;
1007                         goto out_unlock;
1008                 }
1009                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1010                 break;
1011         case DISABLE_KEY:
1012                 wl_cmd->key_action = KEY_REMOVE;
1013                 break;
1014         default:
1015                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1016                 break;
1017         }
1018
1019         ret = wl1251_ps_elp_wakeup(wl);
1020         if (ret < 0)
1021                 goto out_unlock;
1022
1023         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1024         if (ret < 0) {
1025                 wl1251_error("Set KEY type failed");
1026                 goto out_sleep;
1027         }
1028
1029         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1030                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1031
1032         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1033             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1034                 /*
1035                  * We get the key in the following form:
1036                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1037                  * but the target is expecting:
1038                  * TKIP - RX MIC - TX MIC
1039                  */
1040                 memcpy(wl_cmd->key, key->key, 16);
1041                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1042                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1043
1044         } else {
1045                 memcpy(wl_cmd->key, key->key, key->keylen);
1046         }
1047         wl_cmd->key_size = key->keylen;
1048
1049         wl_cmd->id = key->keyidx;
1050         wl_cmd->ssid_profile = 0;
1051
1052         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1053
1054         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1055         if (ret < 0) {
1056                 wl1251_warning("could not set keys");
1057                 goto out_sleep;
1058         }
1059
1060 out_sleep:
1061         wl1251_ps_elp_sleep(wl);
1062
1063 out_unlock:
1064         mutex_unlock(&wl->mutex);
1065
1066 out:
1067         kfree(wl_cmd);
1068
1069         return ret;
1070 }
1071
1072 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1073                              struct ieee80211_vif *vif,
1074                              struct cfg80211_scan_request *req)
1075 {
1076         struct wl1251 *wl = hw->priv;
1077         struct sk_buff *skb;
1078         size_t ssid_len = 0;
1079         u8 *ssid = NULL;
1080         int ret;
1081
1082         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1083
1084         if (req->n_ssids) {
1085                 ssid = req->ssids[0].ssid;
1086                 ssid_len = req->ssids[0].ssid_len;
1087         }
1088
1089         mutex_lock(&wl->mutex);
1090
1091         if (wl->scanning) {
1092                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1093                 ret = -EINVAL;
1094                 goto out;
1095         }
1096
1097         ret = wl1251_ps_elp_wakeup(wl);
1098         if (ret < 0)
1099                 goto out;
1100
1101         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1102                                      req->ie, req->ie_len);
1103         if (!skb) {
1104                 ret = -ENOMEM;
1105                 goto out;
1106         }
1107
1108         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1109                                       skb->len);
1110         dev_kfree_skb(skb);
1111         if (ret < 0)
1112                 goto out_sleep;
1113
1114         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1115         if (ret < 0)
1116                 goto out_sleep;
1117
1118         wl->scanning = true;
1119
1120         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1121                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1122         if (ret < 0) {
1123                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1124                 wl->scanning = false;
1125                 goto out_sleep;
1126         }
1127
1128 out_sleep:
1129         wl1251_ps_elp_sleep(wl);
1130
1131 out:
1132         mutex_unlock(&wl->mutex);
1133
1134         return ret;
1135 }
1136
1137 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1138 {
1139         struct wl1251 *wl = hw->priv;
1140         int ret;
1141
1142         mutex_lock(&wl->mutex);
1143
1144         ret = wl1251_ps_elp_wakeup(wl);
1145         if (ret < 0)
1146                 goto out;
1147
1148         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1149         if (ret < 0)
1150                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1151
1152         wl1251_ps_elp_sleep(wl);
1153
1154 out:
1155         mutex_unlock(&wl->mutex);
1156
1157         return ret;
1158 }
1159
1160 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1161                                        struct ieee80211_vif *vif,
1162                                        struct ieee80211_bss_conf *bss_conf,
1163                                        u32 changed)
1164 {
1165         struct wl1251 *wl = hw->priv;
1166         struct sk_buff *beacon, *skb;
1167         bool enable;
1168         int ret;
1169
1170         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1171
1172         mutex_lock(&wl->mutex);
1173
1174         ret = wl1251_ps_elp_wakeup(wl);
1175         if (ret < 0)
1176                 goto out;
1177
1178         if (changed & BSS_CHANGED_CQM) {
1179                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1180                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1181                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1182                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1183                 if (ret < 0)
1184                         goto out;
1185                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1186         }
1187
1188         if (changed & BSS_CHANGED_BSSID) {
1189                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1190
1191                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
1192                 if (!skb)
1193                         goto out_sleep;
1194
1195                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
1196                                               skb->data, skb->len);
1197                 dev_kfree_skb(skb);
1198                 if (ret < 0)
1199                         goto out_sleep;
1200
1201                 ret = wl1251_build_qos_null_data(wl);
1202                 if (ret < 0)
1203                         goto out;
1204
1205                 if (wl->bss_type != BSS_TYPE_IBSS) {
1206                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1207                                           wl->beacon_int, wl->dtim_period);
1208                         if (ret < 0)
1209                                 goto out_sleep;
1210                 }
1211         }
1212
1213         if (changed & BSS_CHANGED_ASSOC) {
1214                 /* Disable temporary enabled hw connection monitor flag */
1215                 wl->hw->flags &= ~IEEE80211_HW_CONNECTION_MONITOR;
1216
1217                 if (bss_conf->assoc) {
1218                         wl->beacon_int = bss_conf->beacon_int;
1219
1220                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1221                         if (!skb)
1222                                 goto out_sleep;
1223
1224                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1225                                                       skb->data,
1226                                                       skb->len);
1227                         dev_kfree_skb(skb);
1228                         if (ret < 0)
1229                                 goto out_sleep;
1230
1231                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1232                         if (ret < 0)
1233                                 goto out_sleep;
1234                 } else {
1235                         /* use defaults when not associated */
1236                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1237                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1238                 }
1239         }
1240         if (changed & BSS_CHANGED_ERP_SLOT) {
1241                 if (bss_conf->use_short_slot)
1242                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1243                 else
1244                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1245                 if (ret < 0) {
1246                         wl1251_warning("Set slot time failed %d", ret);
1247                         goto out_sleep;
1248                 }
1249         }
1250
1251         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1252                 if (bss_conf->use_short_preamble)
1253                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1254                 else
1255                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1256         }
1257
1258         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1259                 if (bss_conf->use_cts_prot)
1260                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1261                 else
1262                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1263                 if (ret < 0) {
1264                         wl1251_warning("Set ctsprotect failed %d", ret);
1265                         goto out_sleep;
1266                 }
1267         }
1268
1269         if (changed & BSS_CHANGED_ARP_FILTER) {
1270                 __be32 addr = bss_conf->arp_addr_list[0];
1271                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1272
1273                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1274                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1275
1276                 if (ret < 0)
1277                         goto out_sleep;
1278         }
1279
1280         if (changed & BSS_CHANGED_BEACON) {
1281                 beacon = ieee80211_beacon_get(hw, vif);
1282                 if (!beacon)
1283                         goto out_sleep;
1284
1285                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1286                                               beacon->len);
1287
1288                 if (ret < 0) {
1289                         dev_kfree_skb(beacon);
1290                         goto out_sleep;
1291                 }
1292
1293                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1294                                               beacon->len);
1295
1296                 dev_kfree_skb(beacon);
1297
1298                 if (ret < 0)
1299                         goto out_sleep;
1300
1301                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1302                                   wl->channel, wl->dtim_period);
1303
1304                 if (ret < 0)
1305                         goto out_sleep;
1306         }
1307
1308 out_sleep:
1309         wl1251_ps_elp_sleep(wl);
1310
1311 out:
1312         mutex_unlock(&wl->mutex);
1313 }
1314
1315
1316 /* can't be const, mac80211 writes to this */
1317 static struct ieee80211_rate wl1251_rates[] = {
1318         { .bitrate = 10,
1319           .hw_value = 0x1,
1320           .hw_value_short = 0x1, },
1321         { .bitrate = 20,
1322           .hw_value = 0x2,
1323           .hw_value_short = 0x2,
1324           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1325         { .bitrate = 55,
1326           .hw_value = 0x4,
1327           .hw_value_short = 0x4,
1328           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1329         { .bitrate = 110,
1330           .hw_value = 0x20,
1331           .hw_value_short = 0x20,
1332           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1333         { .bitrate = 60,
1334           .hw_value = 0x8,
1335           .hw_value_short = 0x8, },
1336         { .bitrate = 90,
1337           .hw_value = 0x10,
1338           .hw_value_short = 0x10, },
1339         { .bitrate = 120,
1340           .hw_value = 0x40,
1341           .hw_value_short = 0x40, },
1342         { .bitrate = 180,
1343           .hw_value = 0x80,
1344           .hw_value_short = 0x80, },
1345         { .bitrate = 240,
1346           .hw_value = 0x200,
1347           .hw_value_short = 0x200, },
1348         { .bitrate = 360,
1349          .hw_value = 0x400,
1350          .hw_value_short = 0x400, },
1351         { .bitrate = 480,
1352           .hw_value = 0x800,
1353           .hw_value_short = 0x800, },
1354         { .bitrate = 540,
1355           .hw_value = 0x1000,
1356           .hw_value_short = 0x1000, },
1357 };
1358
1359 /* can't be const, mac80211 writes to this */
1360 static struct ieee80211_channel wl1251_channels[] = {
1361         { .hw_value = 1, .center_freq = 2412},
1362         { .hw_value = 2, .center_freq = 2417},
1363         { .hw_value = 3, .center_freq = 2422},
1364         { .hw_value = 4, .center_freq = 2427},
1365         { .hw_value = 5, .center_freq = 2432},
1366         { .hw_value = 6, .center_freq = 2437},
1367         { .hw_value = 7, .center_freq = 2442},
1368         { .hw_value = 8, .center_freq = 2447},
1369         { .hw_value = 9, .center_freq = 2452},
1370         { .hw_value = 10, .center_freq = 2457},
1371         { .hw_value = 11, .center_freq = 2462},
1372         { .hw_value = 12, .center_freq = 2467},
1373         { .hw_value = 13, .center_freq = 2472},
1374 };
1375
1376 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1377                              struct ieee80211_vif *vif, u16 queue,
1378                              const struct ieee80211_tx_queue_params *params)
1379 {
1380         enum wl1251_acx_ps_scheme ps_scheme;
1381         struct wl1251 *wl = hw->priv;
1382         int ret;
1383
1384         mutex_lock(&wl->mutex);
1385
1386         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1387
1388         ret = wl1251_ps_elp_wakeup(wl);
1389         if (ret < 0)
1390                 goto out;
1391
1392         /* mac80211 uses units of 32 usec */
1393         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1394                                 params->cw_min, params->cw_max,
1395                                 params->aifs, params->txop * 32);
1396         if (ret < 0)
1397                 goto out_sleep;
1398
1399         if (params->uapsd)
1400                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1401         else
1402                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1403
1404         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1405                                  CHANNEL_TYPE_EDCF,
1406                                  wl1251_tx_get_queue(queue), ps_scheme,
1407                                  WL1251_ACX_ACK_POLICY_LEGACY);
1408         if (ret < 0)
1409                 goto out_sleep;
1410
1411 out_sleep:
1412         wl1251_ps_elp_sleep(wl);
1413
1414 out:
1415         mutex_unlock(&wl->mutex);
1416
1417         return ret;
1418 }
1419
1420 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1421                                 struct survey_info *survey)
1422 {
1423         struct wl1251 *wl = hw->priv;
1424         struct ieee80211_conf *conf = &hw->conf;
1425
1426         if (idx != 0)
1427                 return -ENOENT;
1428
1429         survey->channel = conf->channel;
1430         survey->filled = SURVEY_INFO_NOISE_DBM;
1431         survey->noise = wl->noise;
1432
1433         return 0;
1434 }
1435
1436 /* can't be const, mac80211 writes to this */
1437 static struct ieee80211_supported_band wl1251_band_2ghz = {
1438         .channels = wl1251_channels,
1439         .n_channels = ARRAY_SIZE(wl1251_channels),
1440         .bitrates = wl1251_rates,
1441         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1442 };
1443
1444 static const struct ieee80211_ops wl1251_ops = {
1445         .start = wl1251_op_start,
1446         .stop = wl1251_op_stop,
1447         .add_interface = wl1251_op_add_interface,
1448         .remove_interface = wl1251_op_remove_interface,
1449         .config = wl1251_op_config,
1450         .prepare_multicast = wl1251_op_prepare_multicast,
1451         .configure_filter = wl1251_op_configure_filter,
1452         .tx = wl1251_op_tx,
1453         .set_key = wl1251_op_set_key,
1454         .hw_scan = wl1251_op_hw_scan,
1455         .bss_info_changed = wl1251_op_bss_info_changed,
1456         .set_rts_threshold = wl1251_op_set_rts_threshold,
1457         .conf_tx = wl1251_op_conf_tx,
1458         .get_survey = wl1251_op_get_survey,
1459 };
1460
1461 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1462 {
1463         unsigned long timeout;
1464
1465         wl1251_reg_write32(wl, EE_ADDR, offset);
1466         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1467
1468         /* EE_CTL_READ clears when data is ready */
1469         timeout = jiffies + msecs_to_jiffies(100);
1470         while (1) {
1471                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1472                         break;
1473
1474                 if (time_after(jiffies, timeout))
1475                         return -ETIMEDOUT;
1476
1477                 msleep(1);
1478         }
1479
1480         *data = wl1251_reg_read32(wl, EE_DATA);
1481         return 0;
1482 }
1483
1484 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1485                               u8 *data, size_t len)
1486 {
1487         size_t i;
1488         int ret;
1489
1490         wl1251_reg_write32(wl, EE_START, 0);
1491
1492         for (i = 0; i < len; i++) {
1493                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1494                 if (ret < 0)
1495                         return ret;
1496         }
1497
1498         return 0;
1499 }
1500
1501 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1502 {
1503         u8 mac[ETH_ALEN];
1504         int i, ret;
1505
1506         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1507
1508         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1509         if (ret < 0) {
1510                 wl1251_warning("failed to read MAC address from EEPROM");
1511                 return ret;
1512         }
1513
1514         /* MAC is stored in reverse order */
1515         for (i = 0; i < ETH_ALEN; i++)
1516                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1517
1518         return 0;
1519 }
1520
1521 /* temporary (?) hack for EEPROM dumping
1522  * (it seems this can only be done before fw is running) */
1523 static int wl1251_dump_eeprom(struct wl1251 *wl)
1524 {
1525         int ret;
1526
1527         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1528
1529         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1530         if (wl->eeprom_dump == NULL) {
1531                 ret = -ENOMEM;
1532                 goto out;
1533         }
1534
1535         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1536         if (ret != 0) {
1537                 wl1251_error("eeprom dump failed: %d", ret);
1538                 kfree(wl->eeprom_dump);
1539                 wl->eeprom_dump = NULL;
1540                 goto out;
1541         }
1542
1543         wl1251_info("eeprom dumped.");
1544
1545 out:
1546         return ret;
1547 }
1548
1549 static int wl1251_register_hw(struct wl1251 *wl)
1550 {
1551         int ret;
1552
1553         if (wl->mac80211_registered)
1554                 return 0;
1555
1556         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1557
1558         ret = ieee80211_register_hw(wl->hw);
1559         if (ret < 0) {
1560                 wl1251_error("unable to register mac80211 hw: %d", ret);
1561                 return ret;
1562         }
1563
1564         wl->mac80211_registered = true;
1565
1566         wl1251_notice("loaded");
1567
1568         return 0;
1569 }
1570
1571 int wl1251_init_ieee80211(struct wl1251 *wl)
1572 {
1573         int ret;
1574
1575         /* The tx descriptor buffer and the TKIP space */
1576         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1577                 + WL1251_TKIP_IV_SPACE;
1578
1579         /* unit us */
1580         /* FIXME: find a proper value */
1581         wl->hw->channel_change_time = 10000;
1582
1583         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1584                 IEEE80211_HW_SUPPORTS_PS |
1585                 IEEE80211_HW_BEACON_FILTER |
1586                 IEEE80211_HW_SUPPORTS_UAPSD |
1587                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1588
1589         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1590                                          BIT(NL80211_IFTYPE_ADHOC);
1591         wl->hw->wiphy->max_scan_ssids = 1;
1592         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1593
1594         wl->hw->queues = 4;
1595
1596         if (wl->use_eeprom)
1597                 wl1251_read_eeprom_mac(wl);
1598         if (wl->dump_eeprom)
1599                 wl1251_dump_eeprom(wl);
1600
1601         ret = wl1251_register_hw(wl);
1602         if (ret)
1603                 goto out;
1604
1605         wl1251_debugfs_init(wl);
1606         wl1251_notice("initialized");
1607
1608         ret = 0;
1609
1610 out:
1611         return ret;
1612 }
1613 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1614
1615 struct ieee80211_hw *wl1251_alloc_hw(void)
1616 {
1617         struct ieee80211_hw *hw;
1618         struct wl1251 *wl;
1619         int i;
1620         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1621
1622         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1623         if (!hw) {
1624                 wl1251_error("could not alloc ieee80211_hw");
1625                 return ERR_PTR(-ENOMEM);
1626         }
1627
1628         wl = hw->priv;
1629         memset(wl, 0, sizeof(*wl));
1630
1631         wl->hw = hw;
1632
1633         wl->data_in_count = 0;
1634
1635         skb_queue_head_init(&wl->tx_queue);
1636
1637         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1638         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1639         wl->channel = WL1251_DEFAULT_CHANNEL;
1640         wl->monitor_present = false;
1641         wl->joined = false;
1642         wl->scanning = false;
1643         wl->bss_type = MAX_BSS_TYPE;
1644         wl->default_key = 0;
1645         wl->listen_int = 1;
1646         wl->rx_counter = 0;
1647         wl->rx_handled = 0;
1648         wl->rx_current_buffer = 0;
1649         wl->rx_last_id = 0;
1650         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1651         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1652         wl->elp = false;
1653         wl->station_mode = STATION_ACTIVE_MODE;
1654         wl->psm_requested = false;
1655         wl->tx_queue_stopped = false;
1656         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1657         wl->rssi_thold = 0;
1658         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1659         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1660         wl->vif = NULL;
1661
1662         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1663                 wl->tx_frames[i] = NULL;
1664
1665         wl->next_tx_complete = 0;
1666
1667         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1668         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1669
1670         /*
1671          * In case our MAC address is not correctly set,
1672          * we use a random but Nokia MAC.
1673          */
1674         memcpy(wl->mac_addr, nokia_oui, 3);
1675         get_random_bytes(wl->mac_addr + 3, 3);
1676
1677         wl->state = WL1251_STATE_OFF;
1678         mutex_init(&wl->mutex);
1679
1680         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1681         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1682
1683         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1684         if (!wl->rx_descriptor) {
1685                 wl1251_error("could not allocate memory for rx descriptor");
1686                 ieee80211_free_hw(hw);
1687                 return ERR_PTR(-ENOMEM);
1688         }
1689
1690         return hw;
1691 }
1692 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1693
1694 int wl1251_free_hw(struct wl1251 *wl)
1695 {
1696         ieee80211_unregister_hw(wl->hw);
1697
1698         wl1251_debugfs_exit(wl);
1699
1700         kfree(wl->target_mem_map);
1701         kfree(wl->data_path);
1702         vfree(wl->fw);
1703         wl->fw = NULL;
1704         kfree(wl->nvs);
1705         wl->nvs = NULL;
1706
1707         kfree(wl->rx_descriptor);
1708         wl->rx_descriptor = NULL;
1709
1710         ieee80211_free_hw(wl->hw);
1711
1712         if (wl->eeprom_dump != NULL)
1713                 kfree(wl->eeprom_dump);
1714
1715         return 0;
1716 }
1717 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1718
1719 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1720 MODULE_LICENSE("GPL");
1721 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1722 MODULE_FIRMWARE(WL1251_FW_NAME);