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         wl1251_no_ps_event(wl);
 380
 381 out:
 382         return ret;
 383 }
 384
 385 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 386 {
 387         struct wl1251 *wl = hw->priv;
 388         unsigned long flags;
 389
 390         skb_queue_tail(&wl->tx_queue, skb);
 391
 392         /*
 393          * The chip specific setup must run before the first TX packet -
 394          * before that, the tx_work will not be initialized!
 395          */
 396
 397         ieee80211_queue_work(wl->hw, &wl->tx_work);
 398
 399         /*
 400          * The workqueue is slow to process the tx_queue and we need stop
 401          * the queue here, otherwise the queue will get too long.
 402          */
 403         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 404                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 405
 406                 spin_lock_irqsave(&wl->wl_lock, flags);
 407                 ieee80211_stop_queues(wl->hw);
 408                 wl->tx_queue_stopped = true;
 409                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 410         }
 411 }
 412
 413 static int wl1251_op_start(struct ieee80211_hw *hw)
 414 {
 415         struct wl1251 *wl = hw->priv;
 416         struct wiphy *wiphy = hw->wiphy;
 417         int ret = 0;
 418
 419         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 420
 421         mutex_lock(&wl->mutex);
 422
 423         if (wl->state != WL1251_STATE_OFF) {
 424                 wl1251_error("cannot start because not in off state: %d",
 425                              wl->state);
 426                 ret = -EBUSY;
 427                 goto out;
 428         }
 429
 430         ret = wl1251_chip_wakeup(wl);
 431         if (ret < 0)
 432                 goto out;
 433
 434         ret = wl1251_boot(wl);
 435         if (ret < 0)
 436                 goto out;
 437
 438         ret = wl1251_hw_init(wl);
 439         if (ret < 0)
 440                 goto out;
 441
 442         ret = wl1251_acx_station_id(wl);
 443         if (ret < 0)
 444                 goto out;
 445
 446         wl->state = WL1251_STATE_ON;
 447
 448         wl1251_info("firmware booted (%s)", wl->fw_ver);
 449
 450         /* update hw/fw version info in wiphy struct */
 451         wiphy->hw_version = wl->chip_id;
 452         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 453
 454 out:
 455         if (ret < 0)
 456                 wl1251_power_off(wl);
 457
 458         mutex_unlock(&wl->mutex);
 459
 460         return ret;
 461 }
 462
 463 static void wl1251_op_stop(struct ieee80211_hw *hw)
 464 {
 465         struct wl1251 *wl = hw->priv;
 466
 467         wl1251_info("down");
 468
 469         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 470
 471         mutex_lock(&wl->mutex);
 472
 473         WARN_ON(wl->state != WL1251_STATE_ON);
 474
 475         if (wl->scanning) {
 476                 ieee80211_scan_completed(wl->hw, true);
 477                 wl->scanning = false;
 478         }
 479
 480         wl->state = WL1251_STATE_OFF;
 481
 482         wl1251_disable_interrupts(wl);
 483
 484         mutex_unlock(&wl->mutex);
 485
 486         cancel_work_sync(&wl->irq_work);
 487         cancel_work_sync(&wl->tx_work);
 488         cancel_delayed_work_sync(&wl->ps_work);
 489         cancel_delayed_work_sync(&wl->elp_work);
 490
 491         mutex_lock(&wl->mutex);
 492
 493         /* let's notify MAC80211 about the remaining pending TX frames */
 494         wl1251_tx_flush(wl);
 495         wl1251_power_off(wl);
 496
 497         memset(wl->bssid, 0, ETH_ALEN);
 498         wl->listen_int = 1;
 499         wl->bss_type = MAX_BSS_TYPE;
 500
 501         wl->data_in_count = 0;
 502         wl->rx_counter = 0;
 503         wl->rx_handled = 0;
 504         wl->rx_current_buffer = 0;
 505         wl->rx_last_id = 0;
 506         wl->next_tx_complete = 0;
 507         wl->elp = false;
 508         wl->station_mode = STATION_ACTIVE_MODE;
 509         wl->tx_queue_stopped = false;
 510         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 511         wl->rssi_thold = 0;
 512         wl->channel = WL1251_DEFAULT_CHANNEL;
 513         wl->monitor_present = false;
 514         wl->joined = false;
 515         wl->long_doze_mode_set = false;
 516
 517         wl1251_debugfs_reset(wl);
 518
 519         mutex_unlock(&wl->mutex);
 520 }
 521
 522 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 523                                    struct ieee80211_vif *vif)
 524 {
 525         struct wl1251 *wl = hw->priv;
 526         int ret = 0;
 527
 528         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 529                      vif->type, vif->addr);
 530
 531         mutex_lock(&wl->mutex);
 532         if (wl->vif) {
 533                 ret = -EBUSY;
 534                 goto out;
 535         }
 536
 537         wl->vif = vif;
 538
 539         switch (vif->type) {
 540         case NL80211_IFTYPE_STATION:
 541                 wl->bss_type = BSS_TYPE_STA_BSS;
 542                 break;
 543         case NL80211_IFTYPE_ADHOC:
 544                 wl->bss_type = BSS_TYPE_IBSS;
 545                 break;
 546         default:
 547                 ret = -EOPNOTSUPP;
 548                 goto out;
 549         }
 550
 551         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 552                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 553                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 554                 ret = wl1251_acx_station_id(wl);
 555                 if (ret < 0)
 556                         goto out;
 557         }
 558
 559 out:
 560         mutex_unlock(&wl->mutex);
 561         return ret;
 562 }
 563
 564 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 565                                          struct ieee80211_vif *vif)
 566 {
 567         struct wl1251 *wl = hw->priv;
 568
 569         mutex_lock(&wl->mutex);
 570         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 571         wl->vif = NULL;
 572         memset(wl->bssid, 0, ETH_ALEN);
 573         mutex_unlock(&wl->mutex);
 574 }
 575
 576 static int wl1251_build_null_data(struct wl1251 *wl)
 577 {
 578         struct sk_buff *skb = NULL;
 579         int size;
 580         void *ptr;
 581         int ret = -ENOMEM;
 582
 583
 584         if (wl->bss_type == BSS_TYPE_IBSS) {
 585                 size = sizeof(struct wl12xx_null_data_template);
 586                 ptr = NULL;
 587         } else {
 588                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 589                 if (!skb)
 590                         goto out;
 591                 size = skb->len;
 592                 ptr = skb->data;
 593         }
 594
 595         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 596
 597 out:
 598         dev_kfree_skb(skb);
 599         if (ret)
 600                 wl1251_warning("cmd buld null data failed %d", ret);
 601
 602         return ret;
 603
 604 }
 605
 606 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 607 {
 608         struct ieee80211_qos_hdr template;
 609
 610         memset(&template, 0, sizeof(template));
 611
 612         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 613         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 614         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 615
 616         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 617                                              IEEE80211_STYPE_QOS_NULLFUNC |
 618                                              IEEE80211_FCTL_TODS);
 619
 620         /* FIXME: not sure what priority to use here */
 621         template.qos_ctrl = cpu_to_le16(0);
 622
 623         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 624                                        sizeof(template));
 625 }
 626
 627 static void wl1251_ps_work(struct work_struct *work)
 628 {
 629         struct delayed_work *dwork;
 630         struct wl1251 *wl;
 631         unsigned long diff, wait;
 632         bool need_ps;
 633         bool have_ps;
 634         int ret;
 635         int i;
 636
 637         dwork = container_of(work, struct delayed_work, work);
 638         wl = container_of(dwork, struct wl1251, ps_work);
 639
 640         mutex_lock(&wl->mutex);
 641
 642         /* don't change PS modes while still transitioning, to avoid possbile
 643          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 644         if (wl->ps_transitioning) {
 645                 diff = jiffies - wl->ps_change_jiffies;
 646                 if (diff > msecs_to_jiffies(500)) {
 647                         wl1251_error("PS change taking too long: %lu", diff);
 648                         wl->ps_transitioning = false;
 649                 } else {
 650                         //wl1251_error("PS still transitioning");
 651                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 652                                 msecs_to_jiffies(50));
 653                         goto out;
 654                 }
 655         }
 656
 657         need_ps = wl->psm_requested && !wl->bss_lost;
 658         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 659
 660         if (need_ps == have_ps) {
 661                 //wl1251_info("ps: already in mode %d", have_ps);
 662                 goto out;
 663         }
 664
 665         /* don't enter PS if there was recent activity */
 666         if (need_ps) {
 667                 wait = 0;
 668
 669                 diff = jiffies - wl->last_no_ps_jiffies[1];
 670                 if (diff < msecs_to_jiffies(1000))
 671                         wait = msecs_to_jiffies(1000) - diff + 1;
 672
 673                 diff = jiffies - wl->last_no_ps_jiffies[0];
 674                 if (diff < msecs_to_jiffies(3000))
 675                         wait += msecs_to_jiffies(1000);
 676
 677                 diff = jiffies - wl->last_io_jiffies;
 678                 if (diff < msecs_to_jiffies(150)) {
 679                         //wl1251_info("ps: postponed psm, j %ld", diff);
 680                         if (wait < msecs_to_jiffies(150) - diff + 1)
 681                                 wait = msecs_to_jiffies(150) - diff + 1;
 682                 }
 683
 684                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 685                         if (wl->tx_frames[i] != NULL) {
 686                                 //wl1251_error("  frm %d busy", i);
 687                                 if (wait < msecs_to_jiffies(50))
 688                                         wait = msecs_to_jiffies(50);
 689                                 break;
 690                         }
 691                 }
 692
 693                 if (wait > 0) {
 694                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 695                         goto out;
 696                 }
 697         }
 698
 699         ret = wl1251_ps_elp_wakeup(wl);
 700         if (ret < 0)
 701                 goto out;
 702
 703         if (need_ps) {
 704                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 705                                             wl->dtim_period);
 706         }
 707         ret = wl1251_ps_set_mode(wl,
 708                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 709         if (ret < 0)
 710                 goto out_sleep;
 711
 712         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 713         //      jiffies - wl->last_io_jiffies);
 714
 715 out_sleep:
 716         wl1251_ps_elp_sleep(wl);
 717
 718 out:
 719         mutex_unlock(&wl->mutex);
 720 }
 721
 722 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 723 {
 724         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 725 }
 726
 727 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 728 {
 729         struct wl1251 *wl = hw->priv;
 730         struct ieee80211_conf *conf = &hw->conf;
 731         int channel, ret = 0;
 732
 733         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 734
 735         wl1251_debug(DEBUG_MAC80211,
 736                      "mac80211 config ch %d monitor %s psm %s power %d",
 737                      channel,
 738                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 739                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 740                      conf->power_level);
 741
 742         mutex_lock(&wl->mutex);
 743
 744         ret = wl1251_ps_elp_wakeup(wl);
 745         if (ret < 0)
 746                 goto out;
 747
 748         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 749                 u32 mode;
 750
 751                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 752                         wl->monitor_present = true;
 753                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 754                 } else {
 755                         wl->monitor_present = false;
 756                         mode = 0;
 757                 }
 758
 759                 ret = wl1251_acx_feature_cfg(wl, mode);
 760                 if (ret < 0)
 761                         goto out_sleep;
 762         }
 763
 764         if (channel != wl->channel) {
 765                 wl->channel = channel;
 766
 767                 /*
 768                  * Use ENABLE_RX command for channel switching when no
 769                  * interface is present (monitor mode only).
 770                  * This leaves the tx path disabled in firmware, whereas
 771                  * the usual JOIN command seems to transmit some frames
 772                  * at firmware level.
 773                  *
 774                  * Note that bss_type must be BSS_TYPE_STA_BSS, also at least
 775                  * one join has to be performed before CMD_ENABLE_RX can
 776                  * properly switch channels (join will be done by CONF_IDLE).
 777                  */
 778                 if (wl->vif == NULL) {
 779                         wl->bss_type = BSS_TYPE_STA_BSS;
 780                         wl->joined = false;
 781                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 782                 } else {
 783                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 784                                           wl->beacon_int, wl->dtim_period);
 785                 }
 786                 if (ret < 0)
 787                         goto out_sleep;
 788         }
 789
 790         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 791                 wl1251_debug(DEBUG_PSM, "psm enabled");
 792
 793                 wl->psm_requested = true;
 794
 795                 wl->dtim_period = conf->ps_dtim_period;
 796
 797                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 798         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 799                 wl1251_debug(DEBUG_PSM, "psm disabled");
 800
 801                 wl->psm_requested = false;
 802
 803                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 804         }
 805
 806         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 807                 if (conf->flags & IEEE80211_CONF_IDLE) {
 808                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 809                         if (ret < 0)
 810                                 goto out_sleep;
 811                 } else {
 812                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 813                         if (ret < 0)
 814                                 goto out_sleep;
 815
 816                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 817                         if (ret < 0)
 818                                 wl1251_error("error waiting for wakeup");
 819
 820                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 821                                           wl->beacon_int, wl->dtim_period);
 822                         if (ret < 0)
 823                                 goto out_sleep;
 824                 }
 825         }
 826
 827         if (conf->power_level != wl->power_level) {
 828                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 829                 if (ret < 0)
 830                         goto out_sleep;
 831
 832                 wl->power_level = conf->power_level;
 833         }
 834
 835 out_sleep:
 836         wl1251_ps_elp_sleep(wl);
 837
 838 out:
 839         mutex_unlock(&wl->mutex);
 840
 841         return ret;
 842 }
 843
 844 struct wl1251_filter_params {
 845         bool enabled;
 846         int mc_list_length;
 847         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 848 };
 849
 850 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 851                                        struct netdev_hw_addr_list *mc_list)
 852 {
 853         struct wl1251_filter_params *fp;
 854         struct netdev_hw_addr *ha;
 855         struct wl1251 *wl = hw->priv;
 856
 857         if (unlikely(wl->state == WL1251_STATE_OFF))
 858                 return 0;
 859
 860         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 861         if (!fp) {
 862                 wl1251_error("Out of memory setting filters.");
 863                 return 0;
 864         }
 865
 866         /* update multicast filtering parameters */
 867         fp->mc_list_length = 0;
 868         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 869                 fp->enabled = false;
 870         } else {
 871                 fp->enabled = true;
 872                 netdev_hw_addr_list_for_each(ha, mc_list) {
 873                         memcpy(fp->mc_list[fp->mc_list_length],
 874                                         ha->addr, ETH_ALEN);
 875                         fp->mc_list_length++;
 876                 }
 877         }
 878
 879         return (u64)(unsigned long)fp;
 880 }
 881
 882 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 883                                   FIF_ALLMULTI | \
 884                                   FIF_FCSFAIL | \
 885                                   FIF_BCN_PRBRESP_PROMISC | \
 886                                   FIF_CONTROL | \
 887                                   FIF_OTHER_BSS | \
 888                                   FIF_PROBE_REQ)
 889
 890 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 891                                        unsigned int changed,
 892                                        unsigned int *total, u64 multicast)
 893 {
 894         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 895         struct wl1251 *wl = hw->priv;
 896         int ret;
 897
 898         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 899
 900         *total &= WL1251_SUPPORTED_FILTERS;
 901         changed &= WL1251_SUPPORTED_FILTERS;
 902
 903         if (changed == 0) {
 904                 /* no filters which we support changed */
 905                 kfree(fp);
 906                 return;
 907         }
 908
 909         mutex_lock(&wl->mutex);
 910
 911         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 912         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 913
 914         if (*total & FIF_PROMISC_IN_BSS) {
 915                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 916                 wl->rx_config |= CFG_RX_ALL_GOOD;
 917         }
 918         if (*total & FIF_ALLMULTI)
 919                 /*
 920                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 921                  * all multicast frames
 922                  */
 923                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 924         if (*total & FIF_FCSFAIL)
 925                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 926         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 927                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 928                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 929         }
 930         if (*total & FIF_CONTROL)
 931                 wl->rx_filter |= CFG_RX_CTL_EN;
 932         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 933                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 934         if (*total & FIF_PROBE_REQ)
 935                 wl->rx_filter |= CFG_RX_PREQ_EN;
 936
 937         if (wl->state == WL1251_STATE_OFF)
 938                 goto out;
 939
 940         ret = wl1251_ps_elp_wakeup(wl);
 941         if (ret < 0)
 942                 goto out;
 943
 944         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 945                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 946         else if (fp)
 947                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 948                                                    fp->mc_list,
 949                                                    fp->mc_list_length);
 950         if (ret < 0)
 951                 goto out;
 952
 953         /* send filters to firmware */
 954         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 955
 956         wl1251_ps_elp_sleep(wl);
 957
 958 out:
 959         mutex_unlock(&wl->mutex);
 960         kfree(fp);
 961 }
 962
 963 /* HW encryption */
 964 static int wl1251_set_key_type(struct wl1251 *wl,
 965                                struct wl1251_cmd_set_keys *key,
 966                                enum set_key_cmd cmd,
 967                                struct ieee80211_key_conf *mac80211_key,
 968                                const u8 *addr)
 969 {
 970         switch (mac80211_key->cipher) {
 971         case WLAN_CIPHER_SUITE_WEP40:
 972         case WLAN_CIPHER_SUITE_WEP104:
 973                 if (is_broadcast_ether_addr(addr))
 974                         key->key_type = KEY_WEP_DEFAULT;
 975                 else
 976                         key->key_type = KEY_WEP_ADDR;
 977
 978                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 979                 break;
 980         case WLAN_CIPHER_SUITE_TKIP:
 981                 if (is_broadcast_ether_addr(addr))
 982                         key->key_type = KEY_TKIP_MIC_GROUP;
 983                 else
 984                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 985
 986                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 987                 break;
 988         case WLAN_CIPHER_SUITE_CCMP:
 989                 if (is_broadcast_ether_addr(addr))
 990                         key->key_type = KEY_AES_GROUP;
 991                 else
 992                         key->key_type = KEY_AES_PAIRWISE;
 993                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 994                 break;
 995         default:
 996                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 997                 return -EOPNOTSUPP;
 998         }
 999
1000         return 0;
1001 }
1002
1003 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1004                              struct ieee80211_vif *vif,
1005                              struct ieee80211_sta *sta,
1006                              struct ieee80211_key_conf *key)
1007 {
1008         struct wl1251 *wl = hw->priv;
1009         struct wl1251_cmd_set_keys *wl_cmd;
1010         const u8 *addr;
1011         int ret;
1012
1013         static const u8 bcast_addr[ETH_ALEN] =
1014                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
1015
1016         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
1017
1018         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
1019         if (!wl_cmd) {
1020                 ret = -ENOMEM;
1021                 goto out;
1022         }
1023
1024         addr = sta ? sta->addr : bcast_addr;
1025
1026         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
1027         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
1028         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
1029                      key->cipher, key->keyidx, key->keylen, key->flags);
1030         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
1031
1032         if (is_zero_ether_addr(addr)) {
1033                 /* We dont support TX only encryption */
1034                 ret = -EOPNOTSUPP;
1035                 goto out;
1036         }
1037
1038         mutex_lock(&wl->mutex);
1039
1040         switch (cmd) {
1041         case SET_KEY:
1042                 if (wl->monitor_present) {
1043                         ret = -EOPNOTSUPP;
1044                         goto out_unlock;
1045                 }
1046                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1047                 break;
1048         case DISABLE_KEY:
1049                 wl_cmd->key_action = KEY_REMOVE;
1050                 break;
1051         default:
1052                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1053                 break;
1054         }
1055
1056         ret = wl1251_ps_elp_wakeup(wl);
1057         if (ret < 0)
1058                 goto out_unlock;
1059
1060         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1061         if (ret < 0) {
1062                 wl1251_error("Set KEY type failed");
1063                 goto out_sleep;
1064         }
1065
1066         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1067                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1068
1069         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1070             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1071                 /*
1072                  * We get the key in the following form:
1073                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1074                  * but the target is expecting:
1075                  * TKIP - RX MIC - TX MIC
1076                  */
1077                 memcpy(wl_cmd->key, key->key, 16);
1078                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1079                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1080
1081         } else {
1082                 memcpy(wl_cmd->key, key->key, key->keylen);
1083         }
1084         wl_cmd->key_size = key->keylen;
1085
1086         wl_cmd->id = key->keyidx;
1087         wl_cmd->ssid_profile = 0;
1088
1089         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1090
1091         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1092         if (ret < 0) {
1093                 wl1251_warning("could not set keys");
1094                 goto out_sleep;
1095         }
1096
1097 out_sleep:
1098         wl1251_ps_elp_sleep(wl);
1099
1100 out_unlock:
1101         mutex_unlock(&wl->mutex);
1102
1103 out:
1104         kfree(wl_cmd);
1105
1106         return ret;
1107 }
1108
1109 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1110                              struct ieee80211_vif *vif,
1111                              struct cfg80211_scan_request *req)
1112 {
1113         struct wl1251 *wl = hw->priv;
1114         struct sk_buff *skb;
1115         size_t ssid_len = 0;
1116         u8 *ssid = NULL;
1117         int ret;
1118
1119         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1120
1121         if (req->n_ssids) {
1122                 ssid = req->ssids[0].ssid;
1123                 ssid_len = req->ssids[0].ssid_len;
1124         }
1125
1126         mutex_lock(&wl->mutex);
1127
1128         if (wl->scanning) {
1129                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1130                 ret = -EINVAL;
1131                 goto out;
1132         }
1133
1134         ret = wl1251_ps_elp_wakeup(wl);
1135         if (ret < 0)
1136                 goto out;
1137
1138         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1139                                      req->ie, req->ie_len);
1140         if (!skb) {
1141                 ret = -ENOMEM;
1142                 goto out;
1143         }
1144
1145         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1146                                       skb->len);
1147         dev_kfree_skb(skb);
1148         if (ret < 0)
1149                 goto out_sleep;
1150
1151         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1152         if (ret < 0)
1153                 goto out_sleep;
1154
1155         wl->scanning = true;
1156
1157         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1158                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1159         if (ret < 0) {
1160                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1161                 wl->scanning = false;
1162                 goto out_sleep;
1163         }
1164
1165 out_sleep:
1166         wl1251_ps_elp_sleep(wl);
1167
1168 out:
1169         mutex_unlock(&wl->mutex);
1170
1171         return ret;
1172 }
1173
1174 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1175 {
1176         struct wl1251 *wl = hw->priv;
1177         int ret;
1178
1179         mutex_lock(&wl->mutex);
1180
1181         ret = wl1251_ps_elp_wakeup(wl);
1182         if (ret < 0)
1183                 goto out;
1184
1185         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1186         if (ret < 0)
1187                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1188
1189         wl1251_ps_elp_sleep(wl);
1190
1191 out:
1192         mutex_unlock(&wl->mutex);
1193
1194         return ret;
1195 }
1196
1197 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1198                                        struct ieee80211_vif *vif,
1199                                        struct ieee80211_bss_conf *bss_conf,
1200                                        u32 changed)
1201 {
1202         struct wl1251 *wl = hw->priv;
1203         struct sk_buff *beacon, *skb;
1204         bool do_join = false;
1205         bool enable;
1206         int ret;
1207
1208         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1209
1210         mutex_lock(&wl->mutex);
1211
1212         ret = wl1251_ps_elp_wakeup(wl);
1213         if (ret < 0)
1214                 goto out;
1215
1216         if (changed & BSS_CHANGED_CQM) {
1217                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1218                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1219                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1220                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1221                 if (ret < 0)
1222                         goto out;
1223                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1224         }
1225
1226         if ((changed & BSS_CHANGED_BSSID) &&
1227             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1228                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1229
1230                 if (!is_zero_ether_addr(wl->bssid)) {
1231                         ret = wl1251_build_null_data(wl);
1232                         if (ret < 0)
1233                                 goto out_sleep;
1234
1235                         ret = wl1251_build_qos_null_data(wl);
1236                         if (ret < 0)
1237                                 goto out_sleep;
1238
1239                         do_join = true;
1240                 }
1241         }
1242
1243         if (changed & BSS_CHANGED_ASSOC) {
1244                 if (bss_conf->assoc) {
1245                         wl->beacon_int = bss_conf->beacon_int;
1246
1247                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1248                         if (!skb)
1249                                 goto out_sleep;
1250
1251                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1252                                                       skb->data,
1253                                                       skb->len);
1254                         dev_kfree_skb(skb);
1255                         if (ret < 0)
1256                                 goto out_sleep;
1257
1258                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1259                         if (ret < 0)
1260                                 goto out_sleep;
1261                 } else {
1262                         /* use defaults when not associated */
1263                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1264                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1265                 }
1266         }
1267         if (changed & BSS_CHANGED_ERP_SLOT) {
1268                 if (bss_conf->use_short_slot)
1269                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1270                 else
1271                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1272                 if (ret < 0) {
1273                         wl1251_warning("Set slot time failed %d", ret);
1274                         goto out_sleep;
1275                 }
1276         }
1277
1278         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1279                 if (bss_conf->use_short_preamble)
1280                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1281                 else
1282                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1283         }
1284
1285         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1286                 if (bss_conf->use_cts_prot)
1287                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1288                 else
1289                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1290                 if (ret < 0) {
1291                         wl1251_warning("Set ctsprotect failed %d", ret);
1292                         goto out_sleep;
1293                 }
1294         }
1295
1296         if (changed & BSS_CHANGED_ARP_FILTER) {
1297                 __be32 addr = bss_conf->arp_addr_list[0];
1298                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1299
1300                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1301                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1302
1303                 if (ret < 0)
1304                         goto out_sleep;
1305         }
1306
1307         if (changed & BSS_CHANGED_BEACON) {
1308                 beacon = ieee80211_beacon_get(hw, vif);
1309                 if (!beacon)
1310                         goto out_sleep;
1311
1312                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1313                                               beacon->len);
1314
1315                 if (ret < 0) {
1316                         dev_kfree_skb(beacon);
1317                         goto out_sleep;
1318                 }
1319
1320                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1321                                               beacon->len);
1322
1323                 dev_kfree_skb(beacon);
1324
1325                 if (ret < 0)
1326                         goto out_sleep;
1327
1328                 do_join = true;
1329         }
1330
1331         if (do_join) {
1332                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1333                                   wl->beacon_int, wl->dtim_period);
1334                 if (ret < 0)
1335                         goto out_sleep;
1336         }
1337
1338 out_sleep:
1339         wl1251_ps_elp_sleep(wl);
1340
1341 out:
1342         mutex_unlock(&wl->mutex);
1343 }
1344
1345
1346 /* can't be const, mac80211 writes to this */
1347 static struct ieee80211_rate wl1251_rates[] = {
1348         { .bitrate = 10,
1349           .hw_value = 0x1,
1350           .hw_value_short = 0x1, },
1351         { .bitrate = 20,
1352           .hw_value = 0x2,
1353           .hw_value_short = 0x2,
1354           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1355         { .bitrate = 55,
1356           .hw_value = 0x4,
1357           .hw_value_short = 0x4,
1358           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1359         { .bitrate = 110,
1360           .hw_value = 0x20,
1361           .hw_value_short = 0x20,
1362           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1363         { .bitrate = 60,
1364           .hw_value = 0x8,
1365           .hw_value_short = 0x8, },
1366         { .bitrate = 90,
1367           .hw_value = 0x10,
1368           .hw_value_short = 0x10, },
1369         { .bitrate = 120,
1370           .hw_value = 0x40,
1371           .hw_value_short = 0x40, },
1372         { .bitrate = 180,
1373           .hw_value = 0x80,
1374           .hw_value_short = 0x80, },
1375         { .bitrate = 240,
1376           .hw_value = 0x200,
1377           .hw_value_short = 0x200, },
1378         { .bitrate = 360,
1379          .hw_value = 0x400,
1380          .hw_value_short = 0x400, },
1381         { .bitrate = 480,
1382           .hw_value = 0x800,
1383           .hw_value_short = 0x800, },
1384         { .bitrate = 540,
1385           .hw_value = 0x1000,
1386           .hw_value_short = 0x1000, },
1387 };
1388
1389 /* can't be const, mac80211 writes to this */
1390 static struct ieee80211_channel wl1251_channels[] = {
1391         { .hw_value = 1, .center_freq = 2412},
1392         { .hw_value = 2, .center_freq = 2417},
1393         { .hw_value = 3, .center_freq = 2422},
1394         { .hw_value = 4, .center_freq = 2427},
1395         { .hw_value = 5, .center_freq = 2432},
1396         { .hw_value = 6, .center_freq = 2437},
1397         { .hw_value = 7, .center_freq = 2442},
1398         { .hw_value = 8, .center_freq = 2447},
1399         { .hw_value = 9, .center_freq = 2452},
1400         { .hw_value = 10, .center_freq = 2457},
1401         { .hw_value = 11, .center_freq = 2462},
1402         { .hw_value = 12, .center_freq = 2467},
1403         { .hw_value = 13, .center_freq = 2472},
1404 };
1405
1406 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1407                              struct ieee80211_vif *vif, u16 queue,
1408                              const struct ieee80211_tx_queue_params *params)
1409 {
1410         enum wl1251_acx_ps_scheme ps_scheme;
1411         struct wl1251 *wl = hw->priv;
1412         int ret;
1413
1414         mutex_lock(&wl->mutex);
1415
1416         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1417
1418         ret = wl1251_ps_elp_wakeup(wl);
1419         if (ret < 0)
1420                 goto out;
1421
1422         /* mac80211 uses units of 32 usec */
1423         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1424                                 params->cw_min, params->cw_max,
1425                                 params->aifs, params->txop * 32);
1426         if (ret < 0)
1427                 goto out_sleep;
1428
1429         if (params->uapsd)
1430                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1431         else
1432                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1433
1434         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1435                                  CHANNEL_TYPE_EDCF,
1436                                  wl1251_tx_get_queue(queue), ps_scheme,
1437                                  WL1251_ACX_ACK_POLICY_LEGACY);
1438         if (ret < 0)
1439                 goto out_sleep;
1440
1441 out_sleep:
1442         wl1251_ps_elp_sleep(wl);
1443
1444 out:
1445         mutex_unlock(&wl->mutex);
1446
1447         return ret;
1448 }
1449
1450 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1451                                 struct survey_info *survey)
1452 {
1453         struct wl1251 *wl = hw->priv;
1454         struct ieee80211_conf *conf = &hw->conf;
1455
1456         if (idx != 0)
1457                 return -ENOENT;
1458
1459         survey->channel = conf->channel;
1460         survey->filled = SURVEY_INFO_NOISE_DBM;
1461         survey->noise = wl->noise;
1462
1463         return 0;
1464 }
1465
1466 /* can't be const, mac80211 writes to this */
1467 static struct ieee80211_supported_band wl1251_band_2ghz = {
1468         .channels = wl1251_channels,
1469         .n_channels = ARRAY_SIZE(wl1251_channels),
1470         .bitrates = wl1251_rates,
1471         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1472 };
1473
1474 static const struct ieee80211_ops wl1251_ops = {
1475         .start = wl1251_op_start,
1476         .stop = wl1251_op_stop,
1477         .add_interface = wl1251_op_add_interface,
1478         .remove_interface = wl1251_op_remove_interface,
1479         .config = wl1251_op_config,
1480         .prepare_multicast = wl1251_op_prepare_multicast,
1481         .configure_filter = wl1251_op_configure_filter,
1482         .tx = wl1251_op_tx,
1483         .set_key = wl1251_op_set_key,
1484         .hw_scan = wl1251_op_hw_scan,
1485         .bss_info_changed = wl1251_op_bss_info_changed,
1486         .set_rts_threshold = wl1251_op_set_rts_threshold,
1487         .conf_tx = wl1251_op_conf_tx,
1488         .get_survey = wl1251_op_get_survey,
1489 };
1490
1491 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1492 {
1493         unsigned long timeout;
1494
1495         wl1251_reg_write32(wl, EE_ADDR, offset);
1496         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1497
1498         /* EE_CTL_READ clears when data is ready */
1499         timeout = jiffies + msecs_to_jiffies(100);
1500         while (1) {
1501                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1502                         break;
1503
1504                 if (time_after(jiffies, timeout))
1505                         return -ETIMEDOUT;
1506
1507                 msleep(1);
1508         }
1509
1510         *data = wl1251_reg_read32(wl, EE_DATA);
1511         return 0;
1512 }
1513
1514 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1515                               u8 *data, size_t len)
1516 {
1517         size_t i;
1518         int ret;
1519
1520         wl1251_reg_write32(wl, EE_START, 0);
1521
1522         for (i = 0; i < len; i++) {
1523                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1524                 if (ret < 0)
1525                         return ret;
1526         }
1527
1528         return 0;
1529 }
1530
1531 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1532 {
1533         u8 mac[ETH_ALEN];
1534         int i, ret;
1535
1536         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1537
1538         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1539         if (ret < 0) {
1540                 wl1251_warning("failed to read MAC address from EEPROM");
1541                 return ret;
1542         }
1543
1544         /* MAC is stored in reverse order */
1545         for (i = 0; i < ETH_ALEN; i++)
1546                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1547
1548         return 0;
1549 }
1550
1551 /* temporary (?) hack for EEPROM dumping
1552  * (it seems this can only be done before fw is running) */
1553 static int wl1251_dump_eeprom(struct wl1251 *wl)
1554 {
1555         int ret;
1556
1557         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1558
1559         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1560         if (wl->eeprom_dump == NULL) {
1561                 ret = -ENOMEM;
1562                 goto out;
1563         }
1564
1565         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1566         if (ret != 0) {
1567                 wl1251_error("eeprom dump failed: %d", ret);
1568                 kfree(wl->eeprom_dump);
1569                 wl->eeprom_dump = NULL;
1570                 goto out;
1571         }
1572
1573         wl1251_info("eeprom dumped.");
1574
1575 out:
1576         return ret;
1577 }
1578
1579 static int wl1251_register_hw(struct wl1251 *wl)
1580 {
1581         int ret;
1582
1583         if (wl->mac80211_registered)
1584                 return 0;
1585
1586         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1587
1588         ret = ieee80211_register_hw(wl->hw);
1589         if (ret < 0) {
1590                 wl1251_error("unable to register mac80211 hw: %d", ret);
1591                 return ret;
1592         }
1593
1594         wl->mac80211_registered = true;
1595
1596         wl1251_notice("loaded");
1597
1598         return 0;
1599 }
1600
1601 int wl1251_init_ieee80211(struct wl1251 *wl)
1602 {
1603         int ret;
1604
1605         /* The tx descriptor buffer and the TKIP space */
1606         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1607                 + WL1251_TKIP_IV_SPACE;
1608
1609         /* unit us */
1610         /* FIXME: find a proper value */
1611         wl->hw->channel_change_time = 10000;
1612
1613         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1614                 IEEE80211_HW_SUPPORTS_PS |
1615                 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
1616                 IEEE80211_HW_BEACON_FILTER |
1617                 IEEE80211_HW_SUPPORTS_UAPSD |
1618                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1619
1620         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1621                                          BIT(NL80211_IFTYPE_ADHOC);
1622         wl->hw->wiphy->max_scan_ssids = 1;
1623         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1624
1625         wl->hw->queues = 4;
1626
1627         if (wl->use_eeprom)
1628                 wl1251_read_eeprom_mac(wl);
1629         if (wl->dump_eeprom)
1630                 wl1251_dump_eeprom(wl);
1631
1632         ret = wl1251_register_hw(wl);
1633         if (ret)
1634                 goto out;
1635
1636         wl1251_debugfs_init(wl);
1637         wl1251_notice("initialized");
1638
1639         ret = 0;
1640
1641 out:
1642         return ret;
1643 }
1644 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1645
1646 struct ieee80211_hw *wl1251_alloc_hw(void)
1647 {
1648         struct ieee80211_hw *hw;
1649         struct wl1251 *wl;
1650         int i;
1651         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1652
1653         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1654         if (!hw) {
1655                 wl1251_error("could not alloc ieee80211_hw");
1656                 return ERR_PTR(-ENOMEM);
1657         }
1658
1659         wl = hw->priv;
1660         memset(wl, 0, sizeof(*wl));
1661
1662         wl->hw = hw;
1663
1664         wl->data_in_count = 0;
1665
1666         skb_queue_head_init(&wl->tx_queue);
1667
1668         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1669         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1670         wl->channel = WL1251_DEFAULT_CHANNEL;
1671         wl->monitor_present = false;
1672         wl->joined = false;
1673         wl->scanning = false;
1674         wl->bss_type = MAX_BSS_TYPE;
1675         wl->default_key = 0;
1676         wl->listen_int = 1;
1677         wl->rx_counter = 0;
1678         wl->rx_handled = 0;
1679         wl->rx_current_buffer = 0;
1680         wl->rx_last_id = 0;
1681         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1682         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1683         wl->elp = false;
1684         wl->station_mode = STATION_ACTIVE_MODE;
1685         wl->psm_requested = false;
1686         wl->tx_queue_stopped = false;
1687         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1688         wl->rssi_thold = 0;
1689         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1690         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1691         wl->vif = NULL;
1692
1693         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1694                 wl->tx_frames[i] = NULL;
1695
1696         wl->next_tx_complete = 0;
1697
1698         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1699         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1700
1701         /*
1702          * In case our MAC address is not correctly set,
1703          * we use a random but Nokia MAC.
1704          */
1705         memcpy(wl->mac_addr, nokia_oui, 3);
1706         get_random_bytes(wl->mac_addr + 3, 3);
1707
1708         wl->state = WL1251_STATE_OFF;
1709         mutex_init(&wl->mutex);
1710
1711         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1712         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1713
1714         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1715         if (!wl->rx_descriptor) {
1716                 wl1251_error("could not allocate memory for rx descriptor");
1717                 ieee80211_free_hw(hw);
1718                 return ERR_PTR(-ENOMEM);
1719         }
1720
1721         return hw;
1722 }
1723 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1724
1725 int wl1251_free_hw(struct wl1251 *wl)
1726 {
1727         ieee80211_unregister_hw(wl->hw);
1728
1729         wl1251_debugfs_exit(wl);
1730
1731         kfree(wl->target_mem_map);
1732         kfree(wl->data_path);
1733         vfree(wl->fw);
1734         wl->fw = NULL;
1735         kfree(wl->nvs);
1736         wl->nvs = NULL;
1737
1738         kfree(wl->rx_descriptor);
1739         wl->rx_descriptor = NULL;
1740
1741         ieee80211_free_hw(wl->hw);
1742
1743         if (wl->eeprom_dump != NULL)
1744                 kfree(wl->eeprom_dump);
1745
1746         return 0;
1747 }
1748 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1749
1750 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1751 MODULE_LICENSE("GPL");
1752 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1753 MODULE_FIRMWARE(WL1251_FW_NAME);