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 static bool use_fw_ps = true;
  47 module_param(use_fw_ps, bool, 0644);
  48 MODULE_PARM_DESC(use_fw_ps, "Enable powersave once and leave it for chip's "
  49                             "firmware to manage. When disabled, mac80211 "
  50                             "will toggle powersave on tx activity instead. "
  51                             "Default: y/Y/1");
  52
  53 void wl1251_enable_interrupts(struct wl1251 *wl)
  54 {
  55         wl->if_ops->enable_irq(wl);
  56 }
  57
  58 void wl1251_disable_interrupts(struct wl1251 *wl)
  59 {
  60         wl->if_ops->disable_irq(wl);
  61 }
  62
  63 static int wl1251_power_off(struct wl1251 *wl)
  64 {
  65         return wl->if_ops->power(wl, false);
  66 }
  67
  68 static int wl1251_power_on(struct wl1251 *wl)
  69 {
  70         return wl->if_ops->power(wl, true);
  71 }
  72
  73 static int wl1251_fetch_firmware(struct wl1251 *wl)
  74 {
  75         const struct firmware *fw;
  76         struct device *dev = wiphy_dev(wl->hw->wiphy);
  77         int ret;
  78
  79         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  80
  81         if (ret < 0) {
  82                 wl1251_error("could not get firmware: %d", ret);
  83                 return ret;
  84         }
  85
  86         if (fw->size % 4) {
  87                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  88                              fw->size);
  89                 ret = -EILSEQ;
  90                 goto out;
  91         }
  92
  93         wl->fw_len = fw->size;
  94         wl->fw = vmalloc(wl->fw_len);
  95
  96         if (!wl->fw) {
  97                 wl1251_error("could not allocate memory for the firmware");
  98                 ret = -ENOMEM;
  99                 goto out;
 100         }
 101
 102         memcpy(wl->fw, fw->data, wl->fw_len);
 103
 104         ret = 0;
 105
 106 out:
 107         release_firmware(fw);
 108
 109         return ret;
 110 }
 111
 112 static int wl1251_fetch_nvs(struct wl1251 *wl)
 113 {
 114         const struct firmware *fw;
 115         struct device *dev = wiphy_dev(wl->hw->wiphy);
 116         int ret;
 117
 118         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 119
 120         if (ret < 0) {
 121                 wl1251_error("could not get nvs file: %d", ret);
 122                 return ret;
 123         }
 124
 125         if (fw->size % 4) {
 126                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 127                              fw->size);
 128                 ret = -EILSEQ;
 129                 goto out;
 130         }
 131
 132         wl->nvs_len = fw->size;
 133         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 134
 135         if (!wl->nvs) {
 136                 wl1251_error("could not allocate memory for the nvs file");
 137                 ret = -ENOMEM;
 138                 goto out;
 139         }
 140
 141         ret = 0;
 142
 143 out:
 144         release_firmware(fw);
 145
 146         return ret;
 147 }
 148
 149 static void wl1251_fw_wakeup(struct wl1251 *wl)
 150 {
 151         u32 elp_reg;
 152
 153         elp_reg = ELPCTRL_WAKE_UP;
 154         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 155         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 156
 157         if (!(elp_reg & ELPCTRL_WLAN_READY))
 158                 wl1251_warning("WLAN not ready");
 159 }
 160
 161 static int wl1251_chip_wakeup(struct wl1251 *wl)
 162 {
 163         int ret;
 164
 165         ret = wl1251_power_on(wl);
 166         if (ret < 0)
 167                 return ret;
 168
 169         msleep(WL1251_POWER_ON_SLEEP);
 170         wl->if_ops->reset(wl);
 171
 172         /* We don't need a real memory partition here, because we only want
 173          * to use the registers at this point. */
 174         wl1251_set_partition(wl,
 175                              0x00000000,
 176                              0x00000000,
 177                              REGISTERS_BASE,
 178                              REGISTERS_DOWN_SIZE);
 179
 180         /* ELP module wake up */
 181         wl1251_fw_wakeup(wl);
 182
 183         /* whal_FwCtrl_BootSm() */
 184
 185         /* 0. read chip id from CHIP_ID */
 186         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 187
 188         /* 1. check if chip id is valid */
 189
 190         switch (wl->chip_id) {
 191         case CHIP_ID_1251_PG12:
 192                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 193                              wl->chip_id);
 194                 break;
 195         case CHIP_ID_1251_PG11:
 196                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 197                              wl->chip_id);
 198                 break;
 199         case CHIP_ID_1251_PG10:
 200         default:
 201                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 202                 ret = -ENODEV;
 203                 goto out;
 204         }
 205
 206         if (wl->fw == NULL) {
 207                 ret = wl1251_fetch_firmware(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212         if (wl->nvs == NULL && !wl->use_eeprom) {
 213                 /* No NVS from netlink, try to get it from the filesystem */
 214                 ret = wl1251_fetch_nvs(wl);
 215                 if (ret < 0)
 216                         goto out;
 217         }
 218
 219 out:
 220         return ret;
 221 }
 222
 223 #define WL1251_IRQ_LOOP_COUNT 100
 224 irqreturn_t wl1251_irq(int irq, void *cookie)
 225 {
 226         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 227         struct wl1251 *wl = cookie;
 228         int ret;
 229
 230         mutex_lock(&wl->mutex);
 231
 232         wl1251_debug(DEBUG_IRQ, "IRQ work");
 233
 234         if (wl->state == WL1251_STATE_OFF)
 235                 goto out;
 236
 237         ret = wl1251_ps_elp_wakeup(wl);
 238         if (ret < 0)
 239                 goto out;
 240
 241         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 242
 243         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 244         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 245
 246         do {
 247                 if (wl->data_path) {
 248                         wl->rx_counter = wl1251_mem_read32(
 249                                 wl, wl->data_path->rx_control_addr);
 250
 251                         /* We handle a frmware bug here */
 252                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 253                         case 0:
 254                                 wl1251_debug(DEBUG_IRQ,
 255                                              "RX: FW and host in sync");
 256                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 257                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 258                                 break;
 259                         case 1:
 260                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 261                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 262                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 263                                 break;
 264                         case 2:
 265                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 266                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 267                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 268                                 break;
 269                         default:
 270                                 wl1251_warning(
 271                                         "RX: FW and host out of sync: %d",
 272                                         wl->rx_counter - wl->rx_handled);
 273                                 break;
 274                         }
 275
 276                         wl->rx_handled = wl->rx_counter;
 277
 278                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 279                                      wl->rx_counter);
 280                 }
 281
 282                 intr &= wl->intr_mask;
 283
 284                 if (intr == 0) {
 285                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 286                         goto out_sleep;
 287                 }
 288
 289                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 290                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 291                         wl1251_tx_complete(wl);
 292                 }
 293
 294                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 295                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 296                         wl1251_rx(wl);
 297
 298                         if ((intr & WL1251_ACX_INTR_RX1_DATA)
 299                             && skb_queue_len(&wl->tx_queue) > 0)
 300                                 wl1251_tx_work_unlocked(wl, false);
 301                 }
 302
 303                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 304                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 305                         wl1251_rx(wl);
 306                 }
 307
 308                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 309                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 310                         wl1251_event_handle(wl, 0);
 311                 }
 312
 313                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 314                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 315                         wl1251_event_handle(wl, 1);
 316                 }
 317
 318                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 319                         wl1251_debug(DEBUG_IRQ,
 320                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 321
 322                 if (skb_queue_len(&wl->tx_queue) > 0)
 323                         wl1251_tx_work_unlocked(wl, false);
 324
 325                 if (--ctr == 0)
 326                         break;
 327
 328                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 329         } while (intr);
 330
 331 out_sleep:
 332         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 333         wl1251_ps_elp_sleep(wl);
 334
 335 out:
 336         mutex_unlock(&wl->mutex);
 337         return IRQ_HANDLED;
 338 }
 339 EXPORT_SYMBOL_GPL(wl1251_irq);
 340
 341 static void wl1251_irq_work(struct work_struct *work)
 342 {
 343         struct wl1251 *wl =
 344                 container_of(work, struct wl1251, irq_work);
 345
 346         wl1251_irq(0, wl);
 347 }
 348
 349 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 350                        u16 beacon_interval, u8 dtim_period)
 351 {
 352         int ret;
 353
 354         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 355                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 356                                      wl->tx_mgmt_frm_rate,
 357                                      wl->tx_mgmt_frm_mod);
 358         if (ret < 0)
 359                 goto out;
 360
 361         /*
 362          * Join command applies filters, and if we are not associated,
 363          * BSSID filter must be disabled for association to work.
 364          */
 365         if (is_zero_ether_addr(wl->bssid))
 366                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 367
 368         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 369                               dtim_period);
 370         if (ret < 0)
 371                 goto out;
 372
 373         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 374         if (ret < 0)
 375                 wl1251_warning("join timeout");
 376
 377         wl1251_no_ps_event(wl);
 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         wl->long_doze_mode_set = false;
 514
 515         wl1251_debugfs_reset(wl);
 516
 517         mutex_unlock(&wl->mutex);
 518 }
 519
 520 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 521                                    struct ieee80211_vif *vif)
 522 {
 523         struct wl1251 *wl = hw->priv;
 524         int ret = 0;
 525
 526         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 527                      vif->type, vif->addr);
 528
 529         mutex_lock(&wl->mutex);
 530         if (wl->vif) {
 531                 ret = -EBUSY;
 532                 goto out;
 533         }
 534
 535         wl->vif = vif;
 536
 537         switch (vif->type) {
 538         case NL80211_IFTYPE_STATION:
 539                 wl->bss_type = BSS_TYPE_STA_BSS;
 540                 break;
 541         case NL80211_IFTYPE_ADHOC:
 542                 wl->bss_type = BSS_TYPE_IBSS;
 543                 break;
 544         default:
 545                 ret = -EOPNOTSUPP;
 546                 goto out;
 547         }
 548
 549         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 550                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 551                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 552                 ret = wl1251_acx_station_id(wl);
 553                 if (ret < 0)
 554                         goto out;
 555         }
 556
 557 out:
 558         mutex_unlock(&wl->mutex);
 559         return ret;
 560 }
 561
 562 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 563                                          struct ieee80211_vif *vif)
 564 {
 565         struct wl1251 *wl = hw->priv;
 566
 567         mutex_lock(&wl->mutex);
 568         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 569         wl->vif = NULL;
 570         memset(wl->bssid, 0, ETH_ALEN);
 571         mutex_unlock(&wl->mutex);
 572 }
 573
 574 static int wl1251_build_null_data(struct wl1251 *wl)
 575 {
 576         struct sk_buff *skb = NULL;
 577         int size;
 578         void *ptr;
 579         int ret = -ENOMEM;
 580
 581
 582         if (wl->bss_type == BSS_TYPE_IBSS) {
 583                 size = sizeof(struct wl12xx_null_data_template);
 584                 ptr = NULL;
 585         } else {
 586                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 587                 if (!skb)
 588                         goto out;
 589                 size = skb->len;
 590                 ptr = skb->data;
 591         }
 592
 593         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 594
 595 out:
 596         dev_kfree_skb(skb);
 597         if (ret)
 598                 wl1251_warning("cmd buld null data failed %d", ret);
 599
 600         return ret;
 601
 602 }
 603
 604 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 605 {
 606         struct ieee80211_qos_hdr template;
 607
 608         memset(&template, 0, sizeof(template));
 609
 610         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 611         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 612         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 613
 614         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 615                                              IEEE80211_STYPE_QOS_NULLFUNC |
 616                                              IEEE80211_FCTL_TODS);
 617
 618         /* FIXME: not sure what priority to use here */
 619         template.qos_ctrl = cpu_to_le16(0);
 620
 621         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 622                                        sizeof(template));
 623 }
 624
 625 static void wl1251_ps_work(struct work_struct *work)
 626 {
 627         struct delayed_work *dwork;
 628         struct wl1251 *wl;
 629         unsigned long diff, wait;
 630         bool need_ps;
 631         bool have_ps;
 632         int ret;
 633         int i;
 634
 635         dwork = container_of(work, struct delayed_work, work);
 636         wl = container_of(dwork, struct wl1251, ps_work);
 637
 638         mutex_lock(&wl->mutex);
 639
 640         /* don't change PS modes while still transitioning, to avoid possbile
 641          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 642         if (wl->ps_transitioning) {
 643                 diff = jiffies - wl->ps_change_jiffies;
 644                 if (diff > msecs_to_jiffies(500)) {
 645                         wl1251_error("PS change taking too long: %lu", diff);
 646                         wl->ps_transitioning = false;
 647                 } else {
 648                         //wl1251_error("PS still transitioning");
 649                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 650                                 msecs_to_jiffies(50));
 651                         goto out;
 652                 }
 653         }
 654
 655         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 656         need_ps = wl->psm_requested && !wl->bss_lost
 657                 && wl->rate < wl->ps_rate_threshold;
 658
 659         if (need_ps == have_ps) {
 660                 //wl1251_info("ps: already in mode %d", have_ps);
 661                 goto out;
 662         }
 663
 664         /* don't enter PS if there was recent activity */
 665         if (need_ps) {
 666                 wait = 0;
 667
 668                 diff = jiffies - wl->last_no_ps_jiffies[1];
 669                 if (diff < msecs_to_jiffies(1000))
 670                         wait = msecs_to_jiffies(1000) - diff + 1;
 671
 672                 diff = jiffies - wl->last_no_ps_jiffies[0];
 673                 if (diff < msecs_to_jiffies(3000))
 674                         wait += msecs_to_jiffies(1000);
 675
 676                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 677                         if (wl->tx_frames[i] != NULL) {
 678                                 //wl1251_error("  frm %d busy", i);
 679                                 if (wait < msecs_to_jiffies(50))
 680                                         wait = msecs_to_jiffies(50);
 681                                 break;
 682                         }
 683                 }
 684
 685                 if (wait > 0) {
 686                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 687                         goto out;
 688                 }
 689         }
 690
 691         ret = wl1251_ps_elp_wakeup(wl);
 692         if (ret < 0)
 693                 goto out;
 694
 695         if (need_ps) {
 696                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 697                                             wl->dtim_period);
 698         }
 699         ret = wl1251_ps_set_mode(wl,
 700                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 701         if (ret < 0)
 702                 goto out_sleep;
 703
 704         // wl1251_info("psm %d, r %u", need_ps, wl->rate);
 705
 706 out_sleep:
 707         wl1251_ps_elp_sleep(wl);
 708
 709 out:
 710         mutex_unlock(&wl->mutex);
 711 }
 712
 713 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 714 {
 715         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 716 }
 717
 718 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 719 {
 720         struct wl1251 *wl = hw->priv;
 721         struct ieee80211_conf *conf = &hw->conf;
 722         int channel, ret = 0;
 723
 724         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 725
 726         wl1251_debug(DEBUG_MAC80211,
 727                      "mac80211 config ch %d monitor %s psm %s power %d",
 728                      channel,
 729                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 730                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 731                      conf->power_level);
 732
 733         mutex_lock(&wl->mutex);
 734
 735         ret = wl1251_ps_elp_wakeup(wl);
 736         if (ret < 0)
 737                 goto out;
 738
 739         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 740                 u32 mode;
 741
 742                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 743                         wl->monitor_present = true;
 744                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 745                 } else {
 746                         wl->monitor_present = false;
 747                         mode = 0;
 748                 }
 749
 750                 ret = wl1251_acx_feature_cfg(wl, mode);
 751                 if (ret < 0)
 752                         goto out_sleep;
 753         }
 754
 755         if (channel != wl->channel) {
 756                 wl->channel = channel;
 757
 758                 /*
 759                  * Use ENABLE_RX command for channel switching when no
 760                  * interface is present (monitor mode only).
 761                  * This leaves the tx path disabled in firmware, whereas
 762                  * the usual JOIN command seems to transmit some frames
 763                  * at firmware level.
 764                  *
 765                  * Note that bss_type must be BSS_TYPE_STA_BSS, also at least
 766                  * one join has to be performed before CMD_ENABLE_RX can
 767                  * properly switch channels (join will be done by CONF_IDLE).
 768                  */
 769                 if (wl->vif == NULL) {
 770                         wl->bss_type = BSS_TYPE_STA_BSS;
 771                         wl->joined = false;
 772                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 773                 } else {
 774                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 775                                           wl->beacon_int, wl->dtim_period);
 776                 }
 777                 if (ret < 0)
 778                         goto out_sleep;
 779         }
 780
 781         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 782                 wl1251_debug(DEBUG_PSM, "psm enabled");
 783
 784                 wl->psm_requested = true;
 785
 786                 wl->dtim_period = conf->ps_dtim_period;
 787
 788                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 789         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 790                 wl1251_debug(DEBUG_PSM, "psm disabled");
 791
 792                 wl->psm_requested = false;
 793
 794                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 795         }
 796
 797         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 798                 if (conf->flags & IEEE80211_CONF_IDLE) {
 799                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 800                         if (ret < 0)
 801                                 goto out_sleep;
 802                 } else {
 803                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 804                         if (ret < 0)
 805                                 goto out_sleep;
 806
 807                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 808                         if (ret < 0)
 809                                 wl1251_error("error waiting for wakeup");
 810
 811                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 812                                           wl->beacon_int, wl->dtim_period);
 813                         if (ret < 0)
 814                                 goto out_sleep;
 815                 }
 816         }
 817
 818         if (conf->power_level != wl->power_level) {
 819                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 820                 if (ret < 0)
 821                         goto out_sleep;
 822
 823                 wl->power_level = conf->power_level;
 824         }
 825
 826 out_sleep:
 827         wl1251_ps_elp_sleep(wl);
 828
 829 out:
 830         mutex_unlock(&wl->mutex);
 831
 832         return ret;
 833 }
 834
 835 struct wl1251_filter_params {
 836         bool enabled;
 837         int mc_list_length;
 838         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 839 };
 840
 841 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 842                                        struct netdev_hw_addr_list *mc_list)
 843 {
 844         struct wl1251_filter_params *fp;
 845         struct netdev_hw_addr *ha;
 846         struct wl1251 *wl = hw->priv;
 847
 848         if (unlikely(wl->state == WL1251_STATE_OFF))
 849                 return 0;
 850
 851         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 852         if (!fp) {
 853                 wl1251_error("Out of memory setting filters.");
 854                 return 0;
 855         }
 856
 857         /* update multicast filtering parameters */
 858         fp->mc_list_length = 0;
 859         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 860                 fp->enabled = false;
 861         } else {
 862                 fp->enabled = true;
 863                 netdev_hw_addr_list_for_each(ha, mc_list) {
 864                         memcpy(fp->mc_list[fp->mc_list_length],
 865                                         ha->addr, ETH_ALEN);
 866                         fp->mc_list_length++;
 867                 }
 868         }
 869
 870         return (u64)(unsigned long)fp;
 871 }
 872
 873 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 874                                   FIF_ALLMULTI | \
 875                                   FIF_FCSFAIL | \
 876                                   FIF_BCN_PRBRESP_PROMISC | \
 877                                   FIF_CONTROL | \
 878                                   FIF_OTHER_BSS | \
 879                                   FIF_PROBE_REQ)
 880
 881 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 882                                        unsigned int changed,
 883                                        unsigned int *total, u64 multicast)
 884 {
 885         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 886         struct wl1251 *wl = hw->priv;
 887         int ret;
 888
 889         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 890
 891         *total &= WL1251_SUPPORTED_FILTERS;
 892         changed &= WL1251_SUPPORTED_FILTERS;
 893
 894         if (changed == 0) {
 895                 /* no filters which we support changed */
 896                 kfree(fp);
 897                 return;
 898         }
 899
 900         mutex_lock(&wl->mutex);
 901
 902         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 903         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 904
 905         if (*total & FIF_PROMISC_IN_BSS) {
 906                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 907                 wl->rx_config |= CFG_RX_ALL_GOOD;
 908         }
 909         if (*total & FIF_ALLMULTI)
 910                 /*
 911                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 912                  * all multicast frames
 913                  */
 914                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 915         if (*total & FIF_FCSFAIL)
 916                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 917         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 918                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 919                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 920         }
 921         if (*total & FIF_CONTROL)
 922                 wl->rx_filter |= CFG_RX_CTL_EN;
 923         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 924                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 925         if (*total & FIF_PROBE_REQ)
 926                 wl->rx_filter |= CFG_RX_PREQ_EN;
 927
 928         if (wl->state == WL1251_STATE_OFF)
 929                 goto out;
 930
 931         ret = wl1251_ps_elp_wakeup(wl);
 932         if (ret < 0)
 933                 goto out;
 934
 935         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 936                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 937         else if (fp)
 938                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 939                                                    fp->mc_list,
 940                                                    fp->mc_list_length);
 941         if (ret < 0)
 942                 goto out;
 943
 944         /* send filters to firmware */
 945         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 946
 947         wl1251_ps_elp_sleep(wl);
 948
 949 out:
 950         mutex_unlock(&wl->mutex);
 951         kfree(fp);
 952 }
 953
 954 /* HW encryption */
 955 static int wl1251_set_key_type(struct wl1251 *wl,
 956                                struct wl1251_cmd_set_keys *key,
 957                                enum set_key_cmd cmd,
 958                                struct ieee80211_key_conf *mac80211_key,
 959                                const u8 *addr)
 960 {
 961         switch (mac80211_key->cipher) {
 962         case WLAN_CIPHER_SUITE_WEP40:
 963         case WLAN_CIPHER_SUITE_WEP104:
 964                 if (is_broadcast_ether_addr(addr))
 965                         key->key_type = KEY_WEP_DEFAULT;
 966                 else
 967                         key->key_type = KEY_WEP_ADDR;
 968
 969                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 970                 break;
 971         case WLAN_CIPHER_SUITE_TKIP:
 972                 if (is_broadcast_ether_addr(addr))
 973                         key->key_type = KEY_TKIP_MIC_GROUP;
 974                 else
 975                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 976
 977                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 978                 break;
 979         case WLAN_CIPHER_SUITE_CCMP:
 980                 if (is_broadcast_ether_addr(addr))
 981                         key->key_type = KEY_AES_GROUP;
 982                 else
 983                         key->key_type = KEY_AES_PAIRWISE;
 984                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 985                 break;
 986         default:
 987                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 988                 return -EOPNOTSUPP;
 989         }
 990
 991         return 0;
 992 }
 993
 994 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 995                              struct ieee80211_vif *vif,
 996                              struct ieee80211_sta *sta,
 997                              struct ieee80211_key_conf *key)
 998 {
 999         struct wl1251 *wl = hw->priv;
1000         struct wl1251_cmd_set_keys *wl_cmd;
1001         const u8 *addr;
1002         int ret;
1003
1004         static const u8 bcast_addr[ETH_ALEN] =
1005                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
1006
1007         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
1008
1009         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
1010         if (!wl_cmd) {
1011                 ret = -ENOMEM;
1012                 goto out;
1013         }
1014
1015         addr = sta ? sta->addr : bcast_addr;
1016
1017         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
1018         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
1019         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
1020                      key->cipher, key->keyidx, key->keylen, key->flags);
1021         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
1022
1023         if (is_zero_ether_addr(addr)) {
1024                 /* We dont support TX only encryption */
1025                 ret = -EOPNOTSUPP;
1026                 goto out;
1027         }
1028
1029         mutex_lock(&wl->mutex);
1030
1031         switch (cmd) {
1032         case SET_KEY:
1033                 if (wl->monitor_present) {
1034                         ret = -EOPNOTSUPP;
1035                         goto out_unlock;
1036                 }
1037                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1038                 break;
1039         case DISABLE_KEY:
1040                 wl_cmd->key_action = KEY_REMOVE;
1041                 break;
1042         default:
1043                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1044                 break;
1045         }
1046
1047         ret = wl1251_ps_elp_wakeup(wl);
1048         if (ret < 0)
1049                 goto out_unlock;
1050
1051         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1052         if (ret < 0) {
1053                 wl1251_error("Set KEY type failed");
1054                 goto out_sleep;
1055         }
1056
1057         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1058                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1059
1060         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1061             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1062                 /*
1063                  * We get the key in the following form:
1064                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1065                  * but the target is expecting:
1066                  * TKIP - RX MIC - TX MIC
1067                  */
1068                 memcpy(wl_cmd->key, key->key, 16);
1069                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1070                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1071
1072         } else {
1073                 memcpy(wl_cmd->key, key->key, key->keylen);
1074         }
1075         wl_cmd->key_size = key->keylen;
1076
1077         wl_cmd->id = key->keyidx;
1078         wl_cmd->ssid_profile = 0;
1079
1080         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1081
1082         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1083         if (ret < 0) {
1084                 wl1251_warning("could not set keys");
1085                 goto out_sleep;
1086         }
1087
1088 out_sleep:
1089         wl1251_ps_elp_sleep(wl);
1090
1091 out_unlock:
1092         mutex_unlock(&wl->mutex);
1093
1094 out:
1095         kfree(wl_cmd);
1096
1097         return ret;
1098 }
1099
1100 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1101                              struct ieee80211_vif *vif,
1102                              struct cfg80211_scan_request *req)
1103 {
1104         struct wl1251 *wl = hw->priv;
1105         struct sk_buff *skb;
1106         size_t ssid_len = 0;
1107         u8 *ssid = NULL;
1108         int ret;
1109
1110         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1111
1112         if (req->n_ssids) {
1113                 ssid = req->ssids[0].ssid;
1114                 ssid_len = req->ssids[0].ssid_len;
1115         }
1116
1117         mutex_lock(&wl->mutex);
1118
1119         if (wl->scanning) {
1120                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1121                 ret = -EINVAL;
1122                 goto out;
1123         }
1124
1125         ret = wl1251_ps_elp_wakeup(wl);
1126         if (ret < 0)
1127                 goto out;
1128
1129         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1130                                      req->ie, req->ie_len);
1131         if (!skb) {
1132                 ret = -ENOMEM;
1133                 goto out;
1134         }
1135
1136         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1137                                       skb->len);
1138         dev_kfree_skb(skb);
1139         if (ret < 0)
1140                 goto out_sleep;
1141
1142         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1143         if (ret < 0)
1144                 goto out_sleep;
1145
1146         wl->scanning = true;
1147
1148         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1149                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1150         if (ret < 0) {
1151                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1152                 wl->scanning = false;
1153                 goto out_sleep;
1154         }
1155
1156 out_sleep:
1157         wl1251_ps_elp_sleep(wl);
1158
1159 out:
1160         mutex_unlock(&wl->mutex);
1161
1162         return ret;
1163 }
1164
1165 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1166 {
1167         struct wl1251 *wl = hw->priv;
1168         int ret;
1169
1170         mutex_lock(&wl->mutex);
1171
1172         ret = wl1251_ps_elp_wakeup(wl);
1173         if (ret < 0)
1174                 goto out;
1175
1176         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1177         if (ret < 0)
1178                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1179
1180         wl1251_ps_elp_sleep(wl);
1181
1182 out:
1183         mutex_unlock(&wl->mutex);
1184
1185         return ret;
1186 }
1187
1188 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1189                                        struct ieee80211_vif *vif,
1190                                        struct ieee80211_bss_conf *bss_conf,
1191                                        u32 changed)
1192 {
1193         struct wl1251 *wl = hw->priv;
1194         struct sk_buff *beacon, *skb;
1195         bool do_join = false;
1196         bool enable;
1197         int ret;
1198
1199         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1200
1201         mutex_lock(&wl->mutex);
1202
1203         ret = wl1251_ps_elp_wakeup(wl);
1204         if (ret < 0)
1205                 goto out;
1206
1207         if (changed & BSS_CHANGED_CQM) {
1208                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1209                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1210                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1211                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1212                 if (ret < 0)
1213                         goto out;
1214                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1215         }
1216
1217         if ((changed & BSS_CHANGED_BSSID) &&
1218             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1219                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1220
1221                 if (!is_zero_ether_addr(wl->bssid)) {
1222                         ret = wl1251_build_null_data(wl);
1223                         if (ret < 0)
1224                                 goto out_sleep;
1225
1226                         ret = wl1251_build_qos_null_data(wl);
1227                         if (ret < 0)
1228                                 goto out_sleep;
1229
1230                         do_join = true;
1231                 }
1232         }
1233
1234         if (changed & BSS_CHANGED_ASSOC) {
1235                 if (bss_conf->assoc) {
1236                         wl->beacon_int = bss_conf->beacon_int;
1237
1238                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1239                         if (!skb)
1240                                 goto out_sleep;
1241
1242                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1243                                                       skb->data,
1244                                                       skb->len);
1245                         dev_kfree_skb(skb);
1246                         if (ret < 0)
1247                                 goto out_sleep;
1248
1249                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1250                         if (ret < 0)
1251                                 goto out_sleep;
1252                 } else {
1253                         /* use defaults when not associated */
1254                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1255                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1256                 }
1257         }
1258         if (changed & BSS_CHANGED_ERP_SLOT) {
1259                 if (bss_conf->use_short_slot)
1260                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1261                 else
1262                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1263                 if (ret < 0) {
1264                         wl1251_warning("Set slot time failed %d", ret);
1265                         goto out_sleep;
1266                 }
1267         }
1268
1269         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1270                 if (bss_conf->use_short_preamble)
1271                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1272                 else
1273                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1274         }
1275
1276         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1277                 if (bss_conf->use_cts_prot)
1278                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1279                 else
1280                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1281                 if (ret < 0) {
1282                         wl1251_warning("Set ctsprotect failed %d", ret);
1283                         goto out_sleep;
1284                 }
1285         }
1286
1287         if (changed & BSS_CHANGED_ARP_FILTER) {
1288                 __be32 addr = bss_conf->arp_addr_list[0];
1289                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1290
1291                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1292                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1293
1294                 if (ret < 0)
1295                         goto out_sleep;
1296         }
1297
1298         if (changed & BSS_CHANGED_BEACON) {
1299                 beacon = ieee80211_beacon_get(hw, vif);
1300                 if (!beacon)
1301                         goto out_sleep;
1302
1303                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1304                                               beacon->len);
1305
1306                 if (ret < 0) {
1307                         dev_kfree_skb(beacon);
1308                         goto out_sleep;
1309                 }
1310
1311                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1312                                               beacon->len);
1313
1314                 dev_kfree_skb(beacon);
1315
1316                 if (ret < 0)
1317                         goto out_sleep;
1318
1319                 do_join = true;
1320         }
1321
1322         if (do_join) {
1323                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1324                                   wl->beacon_int, wl->dtim_period);
1325                 if (ret < 0)
1326                         goto out_sleep;
1327         }
1328
1329 out_sleep:
1330         wl1251_ps_elp_sleep(wl);
1331
1332 out:
1333         mutex_unlock(&wl->mutex);
1334 }
1335
1336
1337 /* can't be const, mac80211 writes to this */
1338 static struct ieee80211_rate wl1251_rates[] = {
1339         { .bitrate = 10,
1340           .hw_value = 0x1,
1341           .hw_value_short = 0x1, },
1342         { .bitrate = 20,
1343           .hw_value = 0x2,
1344           .hw_value_short = 0x2,
1345           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1346         { .bitrate = 55,
1347           .hw_value = 0x4,
1348           .hw_value_short = 0x4,
1349           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1350         { .bitrate = 110,
1351           .hw_value = 0x20,
1352           .hw_value_short = 0x20,
1353           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1354         { .bitrate = 60,
1355           .hw_value = 0x8,
1356           .hw_value_short = 0x8, },
1357         { .bitrate = 90,
1358           .hw_value = 0x10,
1359           .hw_value_short = 0x10, },
1360         { .bitrate = 120,
1361           .hw_value = 0x40,
1362           .hw_value_short = 0x40, },
1363         { .bitrate = 180,
1364           .hw_value = 0x80,
1365           .hw_value_short = 0x80, },
1366         { .bitrate = 240,
1367           .hw_value = 0x200,
1368           .hw_value_short = 0x200, },
1369         { .bitrate = 360,
1370          .hw_value = 0x400,
1371          .hw_value_short = 0x400, },
1372         { .bitrate = 480,
1373           .hw_value = 0x800,
1374           .hw_value_short = 0x800, },
1375         { .bitrate = 540,
1376           .hw_value = 0x1000,
1377           .hw_value_short = 0x1000, },
1378 };
1379
1380 /* can't be const, mac80211 writes to this */
1381 static struct ieee80211_channel wl1251_channels[] = {
1382         { .hw_value = 1, .center_freq = 2412},
1383         { .hw_value = 2, .center_freq = 2417},
1384         { .hw_value = 3, .center_freq = 2422},
1385         { .hw_value = 4, .center_freq = 2427},
1386         { .hw_value = 5, .center_freq = 2432},
1387         { .hw_value = 6, .center_freq = 2437},
1388         { .hw_value = 7, .center_freq = 2442},
1389         { .hw_value = 8, .center_freq = 2447},
1390         { .hw_value = 9, .center_freq = 2452},
1391         { .hw_value = 10, .center_freq = 2457},
1392         { .hw_value = 11, .center_freq = 2462},
1393         { .hw_value = 12, .center_freq = 2467},
1394         { .hw_value = 13, .center_freq = 2472},
1395 };
1396
1397 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1398                              struct ieee80211_vif *vif, u16 queue,
1399                              const struct ieee80211_tx_queue_params *params)
1400 {
1401         enum wl1251_acx_ps_scheme ps_scheme;
1402         struct wl1251 *wl = hw->priv;
1403         int ret;
1404
1405         mutex_lock(&wl->mutex);
1406
1407         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1408
1409         ret = wl1251_ps_elp_wakeup(wl);
1410         if (ret < 0)
1411                 goto out;
1412
1413         /* mac80211 uses units of 32 usec */
1414         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1415                                 params->cw_min, params->cw_max,
1416                                 params->aifs, params->txop * 32);
1417         if (ret < 0)
1418                 goto out_sleep;
1419
1420         if (params->uapsd)
1421                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1422         else
1423                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1424
1425         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1426                                  CHANNEL_TYPE_EDCF,
1427                                  wl1251_tx_get_queue(queue), ps_scheme,
1428                                  WL1251_ACX_ACK_POLICY_LEGACY);
1429         if (ret < 0)
1430                 goto out_sleep;
1431
1432 out_sleep:
1433         wl1251_ps_elp_sleep(wl);
1434
1435 out:
1436         mutex_unlock(&wl->mutex);
1437
1438         return ret;
1439 }
1440
1441 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1442                                 struct survey_info *survey)
1443 {
1444         struct wl1251 *wl = hw->priv;
1445         struct ieee80211_conf *conf = &hw->conf;
1446
1447         if (idx != 0)
1448                 return -ENOENT;
1449
1450         survey->channel = conf->channel;
1451         survey->filled = SURVEY_INFO_NOISE_DBM;
1452         survey->noise = wl->noise;
1453
1454         return 0;
1455 }
1456
1457 /* can't be const, mac80211 writes to this */
1458 static struct ieee80211_supported_band wl1251_band_2ghz = {
1459         .channels = wl1251_channels,
1460         .n_channels = ARRAY_SIZE(wl1251_channels),
1461         .bitrates = wl1251_rates,
1462         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1463 };
1464
1465 static const struct ieee80211_ops wl1251_ops = {
1466         .start = wl1251_op_start,
1467         .stop = wl1251_op_stop,
1468         .add_interface = wl1251_op_add_interface,
1469         .remove_interface = wl1251_op_remove_interface,
1470         .config = wl1251_op_config,
1471         .prepare_multicast = wl1251_op_prepare_multicast,
1472         .configure_filter = wl1251_op_configure_filter,
1473         .tx = wl1251_op_tx,
1474         .set_key = wl1251_op_set_key,
1475         .hw_scan = wl1251_op_hw_scan,
1476         .bss_info_changed = wl1251_op_bss_info_changed,
1477         .set_rts_threshold = wl1251_op_set_rts_threshold,
1478         .conf_tx = wl1251_op_conf_tx,
1479         .get_survey = wl1251_op_get_survey,
1480 };
1481
1482 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1483 {
1484         unsigned long timeout;
1485
1486         wl1251_reg_write32(wl, EE_ADDR, offset);
1487         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1488
1489         /* EE_CTL_READ clears when data is ready */
1490         timeout = jiffies + msecs_to_jiffies(100);
1491         while (1) {
1492                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1493                         break;
1494
1495                 if (time_after(jiffies, timeout))
1496                         return -ETIMEDOUT;
1497
1498                 msleep(1);
1499         }
1500
1501         *data = wl1251_reg_read32(wl, EE_DATA);
1502         return 0;
1503 }
1504
1505 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1506                               u8 *data, size_t len)
1507 {
1508         size_t i;
1509         int ret;
1510
1511         wl1251_reg_write32(wl, EE_START, 0);
1512
1513         for (i = 0; i < len; i++) {
1514                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1515                 if (ret < 0)
1516                         return ret;
1517         }
1518
1519         return 0;
1520 }
1521
1522 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1523 {
1524         u8 mac[ETH_ALEN];
1525         int i, ret;
1526
1527         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1528
1529         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1530         if (ret < 0) {
1531                 wl1251_warning("failed to read MAC address from EEPROM");
1532                 return ret;
1533         }
1534
1535         /* MAC is stored in reverse order */
1536         for (i = 0; i < ETH_ALEN; i++)
1537                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1538
1539         return 0;
1540 }
1541
1542 /* temporary (?) hack for EEPROM dumping
1543  * (it seems this can only be done before fw is running) */
1544 static int wl1251_dump_eeprom(struct wl1251 *wl)
1545 {
1546         int ret;
1547
1548         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1549
1550         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1551         if (wl->eeprom_dump == NULL) {
1552                 ret = -ENOMEM;
1553                 goto out;
1554         }
1555
1556         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1557         if (ret != 0) {
1558                 wl1251_error("eeprom dump failed: %d", ret);
1559                 kfree(wl->eeprom_dump);
1560                 wl->eeprom_dump = NULL;
1561                 goto out;
1562         }
1563
1564         wl1251_info("eeprom dumped.");
1565
1566 out:
1567         return ret;
1568 }
1569
1570 static int wl1251_register_hw(struct wl1251 *wl)
1571 {
1572         int ret;
1573
1574         if (wl->mac80211_registered)
1575                 return 0;
1576
1577         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1578
1579         ret = ieee80211_register_hw(wl->hw);
1580         if (ret < 0) {
1581                 wl1251_error("unable to register mac80211 hw: %d", ret);
1582                 return ret;
1583         }
1584
1585         wl->mac80211_registered = true;
1586
1587         wl1251_notice("loaded");
1588
1589         return 0;
1590 }
1591
1592 int wl1251_init_ieee80211(struct wl1251 *wl)
1593 {
1594         int ret;
1595
1596         /* The tx descriptor buffer and the TKIP space */
1597         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1598                 + WL1251_TKIP_IV_SPACE;
1599
1600         /* unit us */
1601         /* FIXME: find a proper value */
1602         wl->hw->channel_change_time = 10000;
1603
1604         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1605                 IEEE80211_HW_SUPPORTS_PS |
1606                 IEEE80211_HW_BEACON_FILTER |
1607                 IEEE80211_HW_SUPPORTS_UAPSD |
1608                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1609
1610         if (use_fw_ps)
1611                 wl->hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
1612
1613         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1614                                          BIT(NL80211_IFTYPE_ADHOC);
1615         wl->hw->wiphy->max_scan_ssids = 1;
1616         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1617
1618         wl->hw->queues = 4;
1619
1620         if (wl->use_eeprom)
1621                 wl1251_read_eeprom_mac(wl);
1622         if (wl->dump_eeprom)
1623                 wl1251_dump_eeprom(wl);
1624
1625         ret = wl1251_register_hw(wl);
1626         if (ret)
1627                 goto out;
1628
1629         wl1251_debugfs_init(wl);
1630         wl1251_notice("initialized");
1631
1632         ret = 0;
1633
1634 out:
1635         return ret;
1636 }
1637 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1638
1639 struct ieee80211_hw *wl1251_alloc_hw(void)
1640 {
1641         struct ieee80211_hw *hw;
1642         struct wl1251 *wl;
1643         int i;
1644         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1645
1646         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1647         if (!hw) {
1648                 wl1251_error("could not alloc ieee80211_hw");
1649                 return ERR_PTR(-ENOMEM);
1650         }
1651
1652         wl = hw->priv;
1653         memset(wl, 0, sizeof(*wl));
1654
1655         wl->hw = hw;
1656
1657         wl->data_in_count = 0;
1658
1659         skb_queue_head_init(&wl->tx_queue);
1660
1661         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1662         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1663         wl->channel = WL1251_DEFAULT_CHANNEL;
1664         wl->monitor_present = false;
1665         wl->joined = false;
1666         wl->scanning = false;
1667         wl->bss_type = MAX_BSS_TYPE;
1668         wl->default_key = 0;
1669         wl->listen_int = 1;
1670         wl->rx_counter = 0;
1671         wl->rx_handled = 0;
1672         wl->rx_current_buffer = 0;
1673         wl->rx_last_id = 0;
1674         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1675         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1676         wl->elp = false;
1677         wl->station_mode = STATION_ACTIVE_MODE;
1678         wl->psm_requested = false;
1679         wl->tx_queue_stopped = false;
1680         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1681         wl->rssi_thold = 0;
1682         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1683         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1684         wl->vif = NULL;
1685         wl->ps_rate_threshold = 100000;
1686
1687         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1688                 wl->tx_frames[i] = NULL;
1689
1690         wl->next_tx_complete = 0;
1691
1692         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1693         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1694
1695         /*
1696          * In case our MAC address is not correctly set,
1697          * we use a random but Nokia MAC.
1698          */
1699         memcpy(wl->mac_addr, nokia_oui, 3);
1700         get_random_bytes(wl->mac_addr + 3, 3);
1701
1702         wl->state = WL1251_STATE_OFF;
1703         mutex_init(&wl->mutex);
1704
1705         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1706         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1707
1708         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1709         if (!wl->rx_descriptor) {
1710                 wl1251_error("could not allocate memory for rx descriptor");
1711                 ieee80211_free_hw(hw);
1712                 return ERR_PTR(-ENOMEM);
1713         }
1714
1715         return hw;
1716 }
1717 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1718
1719 int wl1251_free_hw(struct wl1251 *wl)
1720 {
1721         ieee80211_unregister_hw(wl->hw);
1722
1723         wl1251_debugfs_exit(wl);
1724
1725         kfree(wl->target_mem_map);
1726         kfree(wl->data_path);
1727         vfree(wl->fw);
1728         wl->fw = NULL;
1729         kfree(wl->nvs);
1730         wl->nvs = NULL;
1731
1732         kfree(wl->rx_descriptor);
1733         wl->rx_descriptor = NULL;
1734
1735         ieee80211_free_hw(wl->hw);
1736
1737         if (wl->eeprom_dump != NULL)
1738                 kfree(wl->eeprom_dump);
1739
1740         return 0;
1741 }
1742 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1743
1744 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1745 MODULE_LICENSE("GPL");
1746 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1747 MODULE_FIRMWARE(WL1251_FW_NAME);