drivers/net/wireless/wl1251/main.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/firmware.h>
  25 #include <linux/delay.h>
  26 #include <linux/irq.h>
  27 #include <linux/crc32.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/slab.h>
  31 #include <linux/netdevice.h>
  32
  33 #include "wl1251.h"
  34 #include "wl12xx_80211.h"
  35 #include "reg.h"
  36 #include "io.h"
  37 #include "cmd.h"
  38 #include "event.h"
  39 #include "tx.h"
  40 #include "rx.h"
  41 #include "ps.h"
  42 #include "init.h"
  43 #include "debugfs.h"
  44 #include "boot.h"
  45
  46 void wl1251_enable_interrupts(struct wl1251 *wl)
  47 {
  48         wl->if_ops->enable_irq(wl);
  49 }
  50
  51 void wl1251_disable_interrupts(struct wl1251 *wl)
  52 {
  53         wl->if_ops->disable_irq(wl);
  54 }
  55
  56 static int wl1251_power_off(struct wl1251 *wl)
  57 {
  58         return wl->if_ops->power(wl, false);
  59 }
  60
  61 static int wl1251_power_on(struct wl1251 *wl)
  62 {
  63         return wl->if_ops->power(wl, true);
  64 }
  65
  66 static int wl1251_fetch_firmware(struct wl1251 *wl)
  67 {
  68         const struct firmware *fw;
  69         struct device *dev = wiphy_dev(wl->hw->wiphy);
  70         int ret;
  71
  72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  73
  74         if (ret < 0) {
  75                 wl1251_error("could not get firmware: %d", ret);
  76                 return ret;
  77         }
  78
  79         if (fw->size % 4) {
  80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
  81                              fw->size);
  82                 ret = -EILSEQ;
  83                 goto out;
  84         }
  85
  86         wl->fw_len = fw->size;
  87         wl->fw = vmalloc(wl->fw_len);
  88
  89         if (!wl->fw) {
  90                 wl1251_error("could not allocate memory for the firmware");
  91                 ret = -ENOMEM;
  92                 goto out;
  93         }
  94
  95         memcpy(wl->fw, fw->data, wl->fw_len);
  96
  97         ret = 0;
  98
  99 out:
 100         release_firmware(fw);
 101
 102         return ret;
 103 }
 104
 105 static int wl1251_fetch_nvs(struct wl1251 *wl)
 106 {
 107         const struct firmware *fw;
 108         struct device *dev = wiphy_dev(wl->hw->wiphy);
 109         int ret;
 110
 111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
 112
 113         if (ret < 0) {
 114                 wl1251_error("could not get nvs file: %d", ret);
 115                 return ret;
 116         }
 117
 118         if (fw->size % 4) {
 119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
 120                              fw->size);
 121                 ret = -EILSEQ;
 122                 goto out;
 123         }
 124
 125         wl->nvs_len = fw->size;
 126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
 127
 128         if (!wl->nvs) {
 129                 wl1251_error("could not allocate memory for the nvs file");
 130                 ret = -ENOMEM;
 131                 goto out;
 132         }
 133
 134         ret = 0;
 135
 136 out:
 137         release_firmware(fw);
 138
 139         return ret;
 140 }
 141
 142 static void wl1251_fw_wakeup(struct wl1251 *wl)
 143 {
 144         u32 elp_reg;
 145
 146         elp_reg = ELPCTRL_WAKE_UP;
 147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 149
 150         if (!(elp_reg & ELPCTRL_WLAN_READY))
 151                 wl1251_warning("WLAN not ready");
 152 }
 153
 154 static int wl1251_chip_wakeup(struct wl1251 *wl)
 155 {
 156         int ret;
 157
 158         ret = wl1251_power_on(wl);
 159         if (ret < 0)
 160                 return ret;
 161
 162         msleep(WL1251_POWER_ON_SLEEP);
 163         wl->if_ops->reset(wl);
 164
 165         /* We don't need a real memory partition here, because we only want
 166          * to use the registers at this point. */
 167         wl1251_set_partition(wl,
 168                              0x00000000,
 169                              0x00000000,
 170                              REGISTERS_BASE,
 171                              REGISTERS_DOWN_SIZE);
 172
 173         /* ELP module wake up */
 174         wl1251_fw_wakeup(wl);
 175
 176         /* whal_FwCtrl_BootSm() */
 177
 178         /* 0. read chip id from CHIP_ID */
 179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 180
 181         /* 1. check if chip id is valid */
 182
 183         switch (wl->chip_id) {
 184         case CHIP_ID_1251_PG12:
 185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 186                              wl->chip_id);
 187                 break;
 188         case CHIP_ID_1251_PG11:
 189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 190                              wl->chip_id);
 191                 break;
 192         case CHIP_ID_1251_PG10:
 193         default:
 194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 195                 ret = -ENODEV;
 196                 goto out;
 197         }
 198
 199         if (wl->fw == NULL) {
 200                 ret = wl1251_fetch_firmware(wl);
 201                 if (ret < 0)
 202                         goto out;
 203         }
 204
 205         if (wl->nvs == NULL && !wl->use_eeprom) {
 206                 /* No NVS from netlink, try to get it from the filesystem */
 207                 ret = wl1251_fetch_nvs(wl);
 208                 if (ret < 0)
 209                         goto out;
 210         }
 211
 212 out:
 213         return ret;
 214 }
 215
 216 #define WL1251_IRQ_LOOP_COUNT 100
 217 irqreturn_t wl1251_irq(int irq, void *cookie)
 218 {
 219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 220         struct wl1251 *wl = cookie;
 221         int ret;
 222
 223         mutex_lock(&wl->mutex);
 224
 225         wl1251_debug(DEBUG_IRQ, "IRQ work");
 226
 227         if (wl->state == WL1251_STATE_OFF)
 228                 goto out;
 229
 230         ret = wl1251_ps_elp_wakeup(wl);
 231         if (ret < 0)
 232                 goto out;
 233
 234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 235
 236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 238
 239         do {
 240                 if (wl->data_path) {
 241                         wl->rx_counter = wl1251_mem_read32(
 242                                 wl, wl->data_path->rx_control_addr);
 243
 244                         /* We handle a frmware bug here */
 245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 246                         case 0:
 247                                 wl1251_debug(DEBUG_IRQ,
 248                                              "RX: FW and host in sync");
 249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
 250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 251                                 break;
 252                         case 1:
 253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
 256                                 break;
 257                         case 2:
 258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
 260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
 261                                 break;
 262                         default:
 263                                 wl1251_warning(
 264                                         "RX: FW and host out of sync: %d",
 265                                         wl->rx_counter - wl->rx_handled);
 266                                 break;
 267                         }
 268
 269                         wl->rx_handled = wl->rx_counter;
 270
 271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 272                                      wl->rx_counter);
 273                 }
 274
 275                 intr &= wl->intr_mask;
 276
 277                 if (intr == 0) {
 278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
 279                         goto out_sleep;
 280                 }
 281
 282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 284                         wl1251_rx(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 289                         wl1251_rx(wl);
 290                 }
 291
 292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
 293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 294                         wl1251_tx_complete(wl);
 295                 }
 296
 297                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 298                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 299                         wl1251_event_handle(wl, 0);
 300                 }
 301
 302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 304                         wl1251_event_handle(wl, 1);
 305                 }
 306
 307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 308                         wl1251_debug(DEBUG_IRQ,
 309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 310
 311                 while (skb_queue_len(&wl->tx_queue) > 0
 312                        && wl1251_tx_path_status(wl) == 0) {
 313
 314                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
 315                         if (skb == NULL)
 316                                 goto out_sleep;
 317
 318                         ret = wl1251_tx_frame(wl, skb);
 319                         if (ret == -EBUSY) {
 320                                 skb_queue_head(&wl->tx_queue, skb);
 321                                 break;
 322                         } else if (ret < 0) {
 323                                 dev_kfree_skb(skb);
 324                         }
 325                 }
 326
 327                 if (--ctr == 0)
 328                         break;
 329
 330                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 331         } while (intr);
 332
 333 out_sleep:
 334         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 335         wl1251_ps_elp_sleep(wl);
 336
 337 out:
 338         mutex_unlock(&wl->mutex);
 339         return IRQ_HANDLED;
 340 }
 341 EXPORT_SYMBOL_GPL(wl1251_irq);
 342
 343 static void wl1251_irq_work(struct work_struct *work)
 344 {
 345         struct wl1251 *wl =
 346                 container_of(work, struct wl1251, irq_work);
 347
 348         wl1251_irq(0, wl);
 349 }
 350
 351 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 352                        u16 beacon_interval, u8 dtim_period)
 353 {
 354         int ret;
 355
 356         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 357                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 358                                      wl->tx_mgmt_frm_rate,
 359                                      wl->tx_mgmt_frm_mod);
 360         if (ret < 0)
 361                 goto out;
 362
 363         /*
 364          * Join command applies filters, and if we are not associated,
 365          * BSSID filter must be disabled for association to work.
 366          */
 367         if (is_zero_ether_addr(wl->bssid))
 368                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 369
 370         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 371                               dtim_period);
 372         if (ret < 0)
 373                 goto out;
 374
 375         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 376         if (ret < 0)
 377                 wl1251_warning("join timeout");
 378
 379 out:
 380         return ret;
 381 }
 382
 383 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 384 {
 385         struct wl1251 *wl = hw->priv;
 386         unsigned long flags;
 387
 388         skb_queue_tail(&wl->tx_queue, skb);
 389
 390         /*
 391          * The chip specific setup must run before the first TX packet -
 392          * before that, the tx_work will not be initialized!
 393          */
 394
 395         ieee80211_queue_work(wl->hw, &wl->tx_work);
 396
 397         /*
 398          * The workqueue is slow to process the tx_queue and we need stop
 399          * the queue here, otherwise the queue will get too long.
 400          */
 401         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 402                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 403
 404                 spin_lock_irqsave(&wl->wl_lock, flags);
 405                 ieee80211_stop_queues(wl->hw);
 406                 wl->tx_queue_stopped = true;
 407                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 408         }
 409 }
 410
 411 static int wl1251_op_start(struct ieee80211_hw *hw)
 412 {
 413         struct wl1251 *wl = hw->priv;
 414         struct wiphy *wiphy = hw->wiphy;
 415         int ret = 0;
 416
 417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 418
 419         mutex_lock(&wl->mutex);
 420
 421         if (wl->state != WL1251_STATE_OFF) {
 422                 wl1251_error("cannot start because not in off state: %d",
 423                              wl->state);
 424                 ret = -EBUSY;
 425                 goto out;
 426         }
 427
 428         ret = wl1251_chip_wakeup(wl);
 429         if (ret < 0)
 430                 goto out;
 431
 432         ret = wl1251_boot(wl);
 433         if (ret < 0)
 434                 goto out;
 435
 436         ret = wl1251_hw_init(wl);
 437         if (ret < 0)
 438                 goto out;
 439
 440         ret = wl1251_acx_station_id(wl);
 441         if (ret < 0)
 442                 goto out;
 443
 444         wl->state = WL1251_STATE_ON;
 445
 446         wl1251_info("firmware booted (%s)", wl->fw_ver);
 447
 448         /* update hw/fw version info in wiphy struct */
 449         wiphy->hw_version = wl->chip_id;
 450         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 451
 452 out:
 453         if (ret < 0)
 454                 wl1251_power_off(wl);
 455
 456         mutex_unlock(&wl->mutex);
 457
 458         return ret;
 459 }
 460
 461 static void wl1251_op_stop(struct ieee80211_hw *hw)
 462 {
 463         struct wl1251 *wl = hw->priv;
 464
 465         wl1251_info("down");
 466
 467         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 468
 469         mutex_lock(&wl->mutex);
 470
 471         WARN_ON(wl->state != WL1251_STATE_ON);
 472
 473         if (wl->scanning) {
 474                 ieee80211_scan_completed(wl->hw, true);
 475                 wl->scanning = false;
 476         }
 477
 478         wl->state = WL1251_STATE_OFF;
 479
 480         wl1251_disable_interrupts(wl);
 481
 482         mutex_unlock(&wl->mutex);
 483
 484         cancel_work_sync(&wl->irq_work);
 485         cancel_work_sync(&wl->tx_work);
 486         cancel_delayed_work_sync(&wl->ps_work);
 487         cancel_delayed_work_sync(&wl->elp_work);
 488
 489         mutex_lock(&wl->mutex);
 490
 491         /* let's notify MAC80211 about the remaining pending TX frames */
 492         wl1251_tx_flush(wl);
 493         wl1251_power_off(wl);
 494
 495         memset(wl->bssid, 0, ETH_ALEN);
 496         wl->listen_int = 1;
 497         wl->bss_type = MAX_BSS_TYPE;
 498
 499         wl->data_in_count = 0;
 500         wl->rx_counter = 0;
 501         wl->rx_handled = 0;
 502         wl->rx_current_buffer = 0;
 503         wl->rx_last_id = 0;
 504         wl->next_tx_complete = 0;
 505         wl->elp = false;
 506         wl->station_mode = STATION_ACTIVE_MODE;
 507         wl->tx_queue_stopped = false;
 508         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 509         wl->rssi_thold = 0;
 510         wl->channel = WL1251_DEFAULT_CHANNEL;
 511         wl->monitor_present = false;
 512         wl->joined = false;
 513         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         need_ps = wl->psm_requested && !wl->bss_lost;
 656         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 657
 658         if (need_ps == have_ps) {
 659                 //wl1251_info("ps: already in mode %d", have_ps);
 660                 goto out;
 661         }
 662
 663         /* don't enter PS if there was recent activity */
 664         if (need_ps) {
 665                 wait = 0;
 666
 667                 diff = jiffies - wl->last_io_jiffies;
 668                 if (diff < msecs_to_jiffies(150)) {
 669                         //wl1251_info("ps: postponed psm, j %ld", diff);
 670                         wait = msecs_to_jiffies(150) - diff + 1;
 671                 }
 672
 673                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 674                         if (wl->tx_frames[i] != NULL) {
 675                                 //wl1251_error("  frm %d busy", i);
 676                                 if (wait < msecs_to_jiffies(50))
 677                                         wait = msecs_to_jiffies(50);
 678                                 break;
 679                         }
 680                 }
 681
 682                 if (wait > 0) {
 683                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 684                         goto out;
 685                 }
 686         }
 687
 688         ret = wl1251_ps_elp_wakeup(wl);
 689         if (ret < 0)
 690                 goto out;
 691
 692         if (need_ps) {
 693                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 694                                             wl->dtim_period);
 695         }
 696         ret = wl1251_ps_set_mode(wl,
 697                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 698         if (ret < 0)
 699                 goto out_sleep;
 700
 701         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
 702         //      jiffies - wl->last_io_jiffies);
 703
 704 out_sleep:
 705         wl1251_ps_elp_sleep(wl);
 706
 707 out:
 708         mutex_unlock(&wl->mutex);
 709 }
 710
 711 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 712 {
 713         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 714 }
 715
 716 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 717 {
 718         struct wl1251 *wl = hw->priv;
 719         struct ieee80211_conf *conf = &hw->conf;
 720         int channel, ret = 0;
 721
 722         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 723
 724         wl1251_debug(DEBUG_MAC80211,
 725                      "mac80211 config ch %d monitor %s psm %s power %d",
 726                      channel,
 727                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 728                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 729                      conf->power_level);
 730
 731         mutex_lock(&wl->mutex);
 732
 733         ret = wl1251_ps_elp_wakeup(wl);
 734         if (ret < 0)
 735                 goto out;
 736
 737         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 738                 u32 mode;
 739
 740                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 741                         wl->monitor_present = true;
 742                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 743                 } else {
 744                         wl->monitor_present = false;
 745                         mode = 0;
 746                 }
 747
 748                 ret = wl1251_acx_feature_cfg(wl, mode);
 749                 if (ret < 0)
 750                         goto out_sleep;
 751         }
 752
 753         if (channel != wl->channel) {
 754                 wl->channel = channel;
 755
 756                 /*
 757                  * Use ENABLE_RX command for channel switching when no
 758                  * interface is present (monitor mode only).
 759                  * This leaves the tx path disabled in firmware, whereas
 760                  * the usual JOIN command seems to transmit some frames
 761                  * at firmware level.
 762                  *
 763                  * Note that bss_type must be BSS_TYPE_STA_BSS, also at least
 764                  * one join has to be performed before CMD_ENABLE_RX can
 765                  * properly switch channels (join will be done by CONF_IDLE).
 766                  */
 767                 if (wl->vif == NULL) {
 768                         wl->bss_type = BSS_TYPE_STA_BSS;
 769                         wl->joined = false;
 770                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 771                 } else {
 772                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 773                                           wl->beacon_int, wl->dtim_period);
 774                 }
 775                 if (ret < 0)
 776                         goto out_sleep;
 777         }
 778
 779         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 780                 wl1251_debug(DEBUG_PSM, "psm enabled");
 781
 782                 wl->psm_requested = true;
 783
 784                 wl->dtim_period = conf->ps_dtim_period;
 785
 786                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 787         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 788                 wl1251_debug(DEBUG_PSM, "psm disabled");
 789
 790                 wl->psm_requested = false;
 791
 792                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 793         }
 794
 795         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 796                 if (conf->flags & IEEE80211_CONF_IDLE) {
 797                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 798                         if (ret < 0)
 799                                 goto out_sleep;
 800                 } else {
 801                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 802                         if (ret < 0)
 803                                 goto out_sleep;
 804
 805                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 806                         if (ret < 0)
 807                                 wl1251_error("error waiting for wakeup");
 808
 809                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 810                                           wl->beacon_int, wl->dtim_period);
 811                         if (ret < 0)
 812                                 goto out_sleep;
 813                 }
 814         }
 815
 816         if (conf->power_level != wl->power_level) {
 817                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 818                 if (ret < 0)
 819                         goto out_sleep;
 820
 821                 wl->power_level = conf->power_level;
 822         }
 823
 824 out_sleep:
 825         wl1251_ps_elp_sleep(wl);
 826
 827 out:
 828         mutex_unlock(&wl->mutex);
 829
 830         return ret;
 831 }
 832
 833 struct wl1251_filter_params {
 834         bool enabled;
 835         int mc_list_length;
 836         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 837 };
 838
 839 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 840                                        struct netdev_hw_addr_list *mc_list)
 841 {
 842         struct wl1251_filter_params *fp;
 843         struct netdev_hw_addr *ha;
 844         struct wl1251 *wl = hw->priv;
 845
 846         if (unlikely(wl->state == WL1251_STATE_OFF))
 847                 return 0;
 848
 849         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 850         if (!fp) {
 851                 wl1251_error("Out of memory setting filters.");
 852                 return 0;
 853         }
 854
 855         /* update multicast filtering parameters */
 856         fp->mc_list_length = 0;
 857         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 858                 fp->enabled = false;
 859         } else {
 860                 fp->enabled = true;
 861                 netdev_hw_addr_list_for_each(ha, mc_list) {
 862                         memcpy(fp->mc_list[fp->mc_list_length],
 863                                         ha->addr, ETH_ALEN);
 864                         fp->mc_list_length++;
 865                 }
 866         }
 867
 868         return (u64)(unsigned long)fp;
 869 }
 870
 871 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 872                                   FIF_ALLMULTI | \
 873                                   FIF_FCSFAIL | \
 874                                   FIF_BCN_PRBRESP_PROMISC | \
 875                                   FIF_CONTROL | \
 876                                   FIF_OTHER_BSS | \
 877                                   FIF_PROBE_REQ)
 878
 879 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 880                                        unsigned int changed,
 881                                        unsigned int *total, u64 multicast)
 882 {
 883         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 884         struct wl1251 *wl = hw->priv;
 885         int ret;
 886
 887         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 888
 889         *total &= WL1251_SUPPORTED_FILTERS;
 890         changed &= WL1251_SUPPORTED_FILTERS;
 891
 892         if (changed == 0) {
 893                 /* no filters which we support changed */
 894                 kfree(fp);
 895                 return;
 896         }
 897
 898         mutex_lock(&wl->mutex);
 899
 900         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 901         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 902
 903         if (*total & FIF_PROMISC_IN_BSS) {
 904                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 905                 wl->rx_config |= CFG_RX_ALL_GOOD;
 906         }
 907         if (*total & FIF_ALLMULTI)
 908                 /*
 909                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 910                  * all multicast frames
 911                  */
 912                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 913         if (*total & FIF_FCSFAIL)
 914                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 915         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 916                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 917                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 918         }
 919         if (*total & FIF_CONTROL)
 920                 wl->rx_filter |= CFG_RX_CTL_EN;
 921         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 922                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 923         if (*total & FIF_PROBE_REQ)
 924                 wl->rx_filter |= CFG_RX_PREQ_EN;
 925
 926         if (wl->state == WL1251_STATE_OFF)
 927                 goto out;
 928
 929         ret = wl1251_ps_elp_wakeup(wl);
 930         if (ret < 0)
 931                 goto out;
 932
 933         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 934                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 935         else if (fp)
 936                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 937                                                    fp->mc_list,
 938                                                    fp->mc_list_length);
 939         if (ret < 0)
 940                 goto out;
 941
 942         /* send filters to firmware */
 943         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 944
 945         wl1251_ps_elp_sleep(wl);
 946
 947 out:
 948         mutex_unlock(&wl->mutex);
 949         kfree(fp);
 950 }
 951
 952 /* HW encryption */
 953 static int wl1251_set_key_type(struct wl1251 *wl,
 954                                struct wl1251_cmd_set_keys *key,
 955                                enum set_key_cmd cmd,
 956                                struct ieee80211_key_conf *mac80211_key,
 957                                const u8 *addr)
 958 {
 959         switch (mac80211_key->cipher) {
 960         case WLAN_CIPHER_SUITE_WEP40:
 961         case WLAN_CIPHER_SUITE_WEP104:
 962                 if (is_broadcast_ether_addr(addr))
 963                         key->key_type = KEY_WEP_DEFAULT;
 964                 else
 965                         key->key_type = KEY_WEP_ADDR;
 966
 967                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 968                 break;
 969         case WLAN_CIPHER_SUITE_TKIP:
 970                 if (is_broadcast_ether_addr(addr))
 971                         key->key_type = KEY_TKIP_MIC_GROUP;
 972                 else
 973                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 974
 975                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 976                 break;
 977         case WLAN_CIPHER_SUITE_CCMP:
 978                 if (is_broadcast_ether_addr(addr))
 979                         key->key_type = KEY_AES_GROUP;
 980                 else
 981                         key->key_type = KEY_AES_PAIRWISE;
 982                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 983                 break;
 984         default:
 985                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 986                 return -EOPNOTSUPP;
 987         }
 988
 989         return 0;
 990 }
 991
 992 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 993                              struct ieee80211_vif *vif,
 994                              struct ieee80211_sta *sta,
 995                              struct ieee80211_key_conf *key)
 996 {
 997         struct wl1251 *wl = hw->priv;
 998         struct wl1251_cmd_set_keys *wl_cmd;
 999         const u8 *addr;
1000         int ret;
1001
1002         static const u8 bcast_addr[ETH_ALEN] =
1003                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
1004
1005         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
1006
1007         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
1008         if (!wl_cmd) {
1009                 ret = -ENOMEM;
1010                 goto out;
1011         }
1012
1013         addr = sta ? sta->addr : bcast_addr;
1014
1015         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
1016         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
1017         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
1018                      key->cipher, key->keyidx, key->keylen, key->flags);
1019         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
1020
1021         if (is_zero_ether_addr(addr)) {
1022                 /* We dont support TX only encryption */
1023                 ret = -EOPNOTSUPP;
1024                 goto out;
1025         }
1026
1027         mutex_lock(&wl->mutex);
1028
1029         switch (cmd) {
1030         case SET_KEY:
1031                 if (wl->monitor_present) {
1032                         ret = -EOPNOTSUPP;
1033                         goto out_unlock;
1034                 }
1035                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1036                 break;
1037         case DISABLE_KEY:
1038                 wl_cmd->key_action = KEY_REMOVE;
1039                 break;
1040         default:
1041                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1042                 break;
1043         }
1044
1045         ret = wl1251_ps_elp_wakeup(wl);
1046         if (ret < 0)
1047                 goto out_unlock;
1048
1049         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1050         if (ret < 0) {
1051                 wl1251_error("Set KEY type failed");
1052                 goto out_sleep;
1053         }
1054
1055         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1056                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1057
1058         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1059             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1060                 /*
1061                  * We get the key in the following form:
1062                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1063                  * but the target is expecting:
1064                  * TKIP - RX MIC - TX MIC
1065                  */
1066                 memcpy(wl_cmd->key, key->key, 16);
1067                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1068                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1069
1070         } else {
1071                 memcpy(wl_cmd->key, key->key, key->keylen);
1072         }
1073         wl_cmd->key_size = key->keylen;
1074
1075         wl_cmd->id = key->keyidx;
1076         wl_cmd->ssid_profile = 0;
1077
1078         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1079
1080         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1081         if (ret < 0) {
1082                 wl1251_warning("could not set keys");
1083                 goto out_sleep;
1084         }
1085
1086 out_sleep:
1087         wl1251_ps_elp_sleep(wl);
1088
1089 out_unlock:
1090         mutex_unlock(&wl->mutex);
1091
1092 out:
1093         kfree(wl_cmd);
1094
1095         return ret;
1096 }
1097
1098 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1099                              struct ieee80211_vif *vif,
1100                              struct cfg80211_scan_request *req)
1101 {
1102         struct wl1251 *wl = hw->priv;
1103         struct sk_buff *skb;
1104         size_t ssid_len = 0;
1105         u8 *ssid = NULL;
1106         int ret;
1107
1108         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1109
1110         if (req->n_ssids) {
1111                 ssid = req->ssids[0].ssid;
1112                 ssid_len = req->ssids[0].ssid_len;
1113         }
1114
1115         mutex_lock(&wl->mutex);
1116
1117         if (wl->scanning) {
1118                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1119                 ret = -EINVAL;
1120                 goto out;
1121         }
1122
1123         ret = wl1251_ps_elp_wakeup(wl);
1124         if (ret < 0)
1125                 goto out;
1126
1127         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1128                                      req->ie, req->ie_len);
1129         if (!skb) {
1130                 ret = -ENOMEM;
1131                 goto out;
1132         }
1133
1134         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1135                                       skb->len);
1136         dev_kfree_skb(skb);
1137         if (ret < 0)
1138                 goto out_sleep;
1139
1140         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1141         if (ret < 0)
1142                 goto out_sleep;
1143
1144         wl->scanning = true;
1145
1146         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1147                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1148         if (ret < 0) {
1149                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1150                 wl->scanning = false;
1151                 goto out_sleep;
1152         }
1153
1154 out_sleep:
1155         wl1251_ps_elp_sleep(wl);
1156
1157 out:
1158         mutex_unlock(&wl->mutex);
1159
1160         return ret;
1161 }
1162
1163 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1164 {
1165         struct wl1251 *wl = hw->priv;
1166         int ret;
1167
1168         mutex_lock(&wl->mutex);
1169
1170         ret = wl1251_ps_elp_wakeup(wl);
1171         if (ret < 0)
1172                 goto out;
1173
1174         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1175         if (ret < 0)
1176                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1177
1178         wl1251_ps_elp_sleep(wl);
1179
1180 out:
1181         mutex_unlock(&wl->mutex);
1182
1183         return ret;
1184 }
1185
1186 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1187                                        struct ieee80211_vif *vif,
1188                                        struct ieee80211_bss_conf *bss_conf,
1189                                        u32 changed)
1190 {
1191         struct wl1251 *wl = hw->priv;
1192         struct sk_buff *beacon, *skb;
1193         bool do_join = false;
1194         bool enable;
1195         int ret;
1196
1197         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1198
1199         mutex_lock(&wl->mutex);
1200
1201         ret = wl1251_ps_elp_wakeup(wl);
1202         if (ret < 0)
1203                 goto out;
1204
1205         if (changed & BSS_CHANGED_CQM) {
1206                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1207                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1208                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1209                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1210                 if (ret < 0)
1211                         goto out;
1212                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1213         }
1214
1215         if ((changed & BSS_CHANGED_BSSID) &&
1216             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1217                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1218
1219                 if (!is_zero_ether_addr(wl->bssid)) {
1220                         ret = wl1251_build_null_data(wl);
1221                         if (ret < 0)
1222                                 goto out_sleep;
1223
1224                         ret = wl1251_build_qos_null_data(wl);
1225                         if (ret < 0)
1226                                 goto out_sleep;
1227
1228                         do_join = true;
1229                 }
1230         }
1231
1232         if (changed & BSS_CHANGED_ASSOC) {
1233                 if (bss_conf->assoc) {
1234                         wl->beacon_int = bss_conf->beacon_int;
1235
1236                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1237                         if (!skb)
1238                                 goto out_sleep;
1239
1240                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1241                                                       skb->data,
1242                                                       skb->len);
1243                         dev_kfree_skb(skb);
1244                         if (ret < 0)
1245                                 goto out_sleep;
1246
1247                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1248                         if (ret < 0)
1249                                 goto out_sleep;
1250                 } else {
1251                         /* use defaults when not associated */
1252                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1253                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1254                 }
1255         }
1256         if (changed & BSS_CHANGED_ERP_SLOT) {
1257                 if (bss_conf->use_short_slot)
1258                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1259                 else
1260                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1261                 if (ret < 0) {
1262                         wl1251_warning("Set slot time failed %d", ret);
1263                         goto out_sleep;
1264                 }
1265         }
1266
1267         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1268                 if (bss_conf->use_short_preamble)
1269                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1270                 else
1271                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1272         }
1273
1274         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1275                 if (bss_conf->use_cts_prot)
1276                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1277                 else
1278                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1279                 if (ret < 0) {
1280                         wl1251_warning("Set ctsprotect failed %d", ret);
1281                         goto out_sleep;
1282                 }
1283         }
1284
1285         if (changed & BSS_CHANGED_ARP_FILTER) {
1286                 __be32 addr = bss_conf->arp_addr_list[0];
1287                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1288
1289                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1290                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1291
1292                 if (ret < 0)
1293                         goto out_sleep;
1294         }
1295
1296         if (changed & BSS_CHANGED_BEACON) {
1297                 beacon = ieee80211_beacon_get(hw, vif);
1298                 if (!beacon)
1299                         goto out_sleep;
1300
1301                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1302                                               beacon->len);
1303
1304                 if (ret < 0) {
1305                         dev_kfree_skb(beacon);
1306                         goto out_sleep;
1307                 }
1308
1309                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1310                                               beacon->len);
1311
1312                 dev_kfree_skb(beacon);
1313
1314                 if (ret < 0)
1315                         goto out_sleep;
1316
1317                 do_join = true;
1318         }
1319
1320         if (do_join) {
1321                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1322                                   wl->beacon_int, wl->dtim_period);
1323                 if (ret < 0)
1324                         goto out_sleep;
1325         }
1326
1327 out_sleep:
1328         wl1251_ps_elp_sleep(wl);
1329
1330 out:
1331         mutex_unlock(&wl->mutex);
1332 }
1333
1334
1335 /* can't be const, mac80211 writes to this */
1336 static struct ieee80211_rate wl1251_rates[] = {
1337         { .bitrate = 10,
1338           .hw_value = 0x1,
1339           .hw_value_short = 0x1, },
1340         { .bitrate = 20,
1341           .hw_value = 0x2,
1342           .hw_value_short = 0x2,
1343           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1344         { .bitrate = 55,
1345           .hw_value = 0x4,
1346           .hw_value_short = 0x4,
1347           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1348         { .bitrate = 110,
1349           .hw_value = 0x20,
1350           .hw_value_short = 0x20,
1351           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1352         { .bitrate = 60,
1353           .hw_value = 0x8,
1354           .hw_value_short = 0x8, },
1355         { .bitrate = 90,
1356           .hw_value = 0x10,
1357           .hw_value_short = 0x10, },
1358         { .bitrate = 120,
1359           .hw_value = 0x40,
1360           .hw_value_short = 0x40, },
1361         { .bitrate = 180,
1362           .hw_value = 0x80,
1363           .hw_value_short = 0x80, },
1364         { .bitrate = 240,
1365           .hw_value = 0x200,
1366           .hw_value_short = 0x200, },
1367         { .bitrate = 360,
1368          .hw_value = 0x400,
1369          .hw_value_short = 0x400, },
1370         { .bitrate = 480,
1371           .hw_value = 0x800,
1372           .hw_value_short = 0x800, },
1373         { .bitrate = 540,
1374           .hw_value = 0x1000,
1375           .hw_value_short = 0x1000, },
1376 };
1377
1378 /* can't be const, mac80211 writes to this */
1379 static struct ieee80211_channel wl1251_channels[] = {
1380         { .hw_value = 1, .center_freq = 2412},
1381         { .hw_value = 2, .center_freq = 2417},
1382         { .hw_value = 3, .center_freq = 2422},
1383         { .hw_value = 4, .center_freq = 2427},
1384         { .hw_value = 5, .center_freq = 2432},
1385         { .hw_value = 6, .center_freq = 2437},
1386         { .hw_value = 7, .center_freq = 2442},
1387         { .hw_value = 8, .center_freq = 2447},
1388         { .hw_value = 9, .center_freq = 2452},
1389         { .hw_value = 10, .center_freq = 2457},
1390         { .hw_value = 11, .center_freq = 2462},
1391         { .hw_value = 12, .center_freq = 2467},
1392         { .hw_value = 13, .center_freq = 2472},
1393 };
1394
1395 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1396                              struct ieee80211_vif *vif, u16 queue,
1397                              const struct ieee80211_tx_queue_params *params)
1398 {
1399         enum wl1251_acx_ps_scheme ps_scheme;
1400         struct wl1251 *wl = hw->priv;
1401         int ret;
1402
1403         mutex_lock(&wl->mutex);
1404
1405         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1406
1407         ret = wl1251_ps_elp_wakeup(wl);
1408         if (ret < 0)
1409                 goto out;
1410
1411         /* mac80211 uses units of 32 usec */
1412         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1413                                 params->cw_min, params->cw_max,
1414                                 params->aifs, params->txop * 32);
1415         if (ret < 0)
1416                 goto out_sleep;
1417
1418         if (params->uapsd)
1419                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1420         else
1421                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1422
1423         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1424                                  CHANNEL_TYPE_EDCF,
1425                                  wl1251_tx_get_queue(queue), ps_scheme,
1426                                  WL1251_ACX_ACK_POLICY_LEGACY);
1427         if (ret < 0)
1428                 goto out_sleep;
1429
1430 out_sleep:
1431         wl1251_ps_elp_sleep(wl);
1432
1433 out:
1434         mutex_unlock(&wl->mutex);
1435
1436         return ret;
1437 }
1438
1439 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1440                                 struct survey_info *survey)
1441 {
1442         struct wl1251 *wl = hw->priv;
1443         struct ieee80211_conf *conf = &hw->conf;
1444
1445         if (idx != 0)
1446                 return -ENOENT;
1447
1448         survey->channel = conf->channel;
1449         survey->filled = SURVEY_INFO_NOISE_DBM;
1450         survey->noise = wl->noise;
1451
1452         return 0;
1453 }
1454
1455 /* can't be const, mac80211 writes to this */
1456 static struct ieee80211_supported_band wl1251_band_2ghz = {
1457         .channels = wl1251_channels,
1458         .n_channels = ARRAY_SIZE(wl1251_channels),
1459         .bitrates = wl1251_rates,
1460         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1461 };
1462
1463 static const struct ieee80211_ops wl1251_ops = {
1464         .start = wl1251_op_start,
1465         .stop = wl1251_op_stop,
1466         .add_interface = wl1251_op_add_interface,
1467         .remove_interface = wl1251_op_remove_interface,
1468         .config = wl1251_op_config,
1469         .prepare_multicast = wl1251_op_prepare_multicast,
1470         .configure_filter = wl1251_op_configure_filter,
1471         .tx = wl1251_op_tx,
1472         .set_key = wl1251_op_set_key,
1473         .hw_scan = wl1251_op_hw_scan,
1474         .bss_info_changed = wl1251_op_bss_info_changed,
1475         .set_rts_threshold = wl1251_op_set_rts_threshold,
1476         .conf_tx = wl1251_op_conf_tx,
1477         .get_survey = wl1251_op_get_survey,
1478 };
1479
1480 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1481 {
1482         unsigned long timeout;
1483
1484         wl1251_reg_write32(wl, EE_ADDR, offset);
1485         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1486
1487         /* EE_CTL_READ clears when data is ready */
1488         timeout = jiffies + msecs_to_jiffies(100);
1489         while (1) {
1490                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1491                         break;
1492
1493                 if (time_after(jiffies, timeout))
1494                         return -ETIMEDOUT;
1495
1496                 msleep(1);
1497         }
1498
1499         *data = wl1251_reg_read32(wl, EE_DATA);
1500         return 0;
1501 }
1502
1503 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1504                               u8 *data, size_t len)
1505 {
1506         size_t i;
1507         int ret;
1508
1509         wl1251_reg_write32(wl, EE_START, 0);
1510
1511         for (i = 0; i < len; i++) {
1512                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1513                 if (ret < 0)
1514                         return ret;
1515         }
1516
1517         return 0;
1518 }
1519
1520 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1521 {
1522         u8 mac[ETH_ALEN];
1523         int i, ret;
1524
1525         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1526
1527         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1528         if (ret < 0) {
1529                 wl1251_warning("failed to read MAC address from EEPROM");
1530                 return ret;
1531         }
1532
1533         /* MAC is stored in reverse order */
1534         for (i = 0; i < ETH_ALEN; i++)
1535                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1536
1537         return 0;
1538 }
1539
1540 /* temporary (?) hack for EEPROM dumping
1541  * (it seems this can only be done before fw is running) */
1542 static int wl1251_dump_eeprom(struct wl1251 *wl)
1543 {
1544         int ret;
1545
1546         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1547
1548         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1549         if (wl->eeprom_dump == NULL) {
1550                 ret = -ENOMEM;
1551                 goto out;
1552         }
1553
1554         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1555         if (ret != 0) {
1556                 wl1251_error("eeprom dump failed: %d", ret);
1557                 kfree(wl->eeprom_dump);
1558                 wl->eeprom_dump = NULL;
1559                 goto out;
1560         }
1561
1562         wl1251_info("eeprom dumped.");
1563
1564 out:
1565         return ret;
1566 }
1567
1568 static int wl1251_register_hw(struct wl1251 *wl)
1569 {
1570         int ret;
1571
1572         if (wl->mac80211_registered)
1573                 return 0;
1574
1575         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1576
1577         ret = ieee80211_register_hw(wl->hw);
1578         if (ret < 0) {
1579                 wl1251_error("unable to register mac80211 hw: %d", ret);
1580                 return ret;
1581         }
1582
1583         wl->mac80211_registered = true;
1584
1585         wl1251_notice("loaded");
1586
1587         return 0;
1588 }
1589
1590 int wl1251_init_ieee80211(struct wl1251 *wl)
1591 {
1592         int ret;
1593
1594         /* The tx descriptor buffer and the TKIP space */
1595         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1596                 + WL1251_TKIP_IV_SPACE;
1597
1598         /* unit us */
1599         /* FIXME: find a proper value */
1600         wl->hw->channel_change_time = 10000;
1601
1602         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1603                 IEEE80211_HW_SUPPORTS_PS |
1604                 IEEE80211_HW_BEACON_FILTER |
1605                 IEEE80211_HW_SUPPORTS_UAPSD |
1606                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1607
1608         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1609                                          BIT(NL80211_IFTYPE_ADHOC);
1610         wl->hw->wiphy->max_scan_ssids = 1;
1611         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1612
1613         wl->hw->queues = 4;
1614
1615         if (wl->use_eeprom)
1616                 wl1251_read_eeprom_mac(wl);
1617         if (wl->dump_eeprom)
1618                 wl1251_dump_eeprom(wl);
1619
1620         ret = wl1251_register_hw(wl);
1621         if (ret)
1622                 goto out;
1623
1624         wl1251_debugfs_init(wl);
1625         wl1251_notice("initialized");
1626
1627         ret = 0;
1628
1629 out:
1630         return ret;
1631 }
1632 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1633
1634 struct ieee80211_hw *wl1251_alloc_hw(void)
1635 {
1636         struct ieee80211_hw *hw;
1637         struct wl1251 *wl;
1638         int i;
1639         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1640
1641         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1642         if (!hw) {
1643                 wl1251_error("could not alloc ieee80211_hw");
1644                 return ERR_PTR(-ENOMEM);
1645         }
1646
1647         wl = hw->priv;
1648         memset(wl, 0, sizeof(*wl));
1649
1650         wl->hw = hw;
1651
1652         wl->data_in_count = 0;
1653
1654         skb_queue_head_init(&wl->tx_queue);
1655
1656         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1657         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1658         wl->channel = WL1251_DEFAULT_CHANNEL;
1659         wl->monitor_present = false;
1660         wl->joined = false;
1661         wl->scanning = false;
1662         wl->bss_type = MAX_BSS_TYPE;
1663         wl->default_key = 0;
1664         wl->listen_int = 1;
1665         wl->rx_counter = 0;
1666         wl->rx_handled = 0;
1667         wl->rx_current_buffer = 0;
1668         wl->rx_last_id = 0;
1669         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1670         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1671         wl->elp = false;
1672         wl->station_mode = STATION_ACTIVE_MODE;
1673         wl->psm_requested = false;
1674         wl->tx_queue_stopped = false;
1675         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1676         wl->rssi_thold = 0;
1677         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1678         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1679         wl->vif = NULL;
1680
1681         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1682                 wl->tx_frames[i] = NULL;
1683
1684         wl->next_tx_complete = 0;
1685
1686         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1687         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1688
1689         /*
1690          * In case our MAC address is not correctly set,
1691          * we use a random but Nokia MAC.
1692          */
1693         memcpy(wl->mac_addr, nokia_oui, 3);
1694         get_random_bytes(wl->mac_addr + 3, 3);
1695
1696         wl->state = WL1251_STATE_OFF;
1697         mutex_init(&wl->mutex);
1698
1699         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1700         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1701
1702         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1703         if (!wl->rx_descriptor) {
1704                 wl1251_error("could not allocate memory for rx descriptor");
1705                 ieee80211_free_hw(hw);
1706                 return ERR_PTR(-ENOMEM);
1707         }
1708
1709         return hw;
1710 }
1711 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1712
1713 int wl1251_free_hw(struct wl1251 *wl)
1714 {
1715         ieee80211_unregister_hw(wl->hw);
1716
1717         wl1251_debugfs_exit(wl);
1718
1719         kfree(wl->target_mem_map);
1720         kfree(wl->data_path);
1721         vfree(wl->fw);
1722         wl->fw = NULL;
1723         kfree(wl->nvs);
1724         wl->nvs = NULL;
1725
1726         kfree(wl->rx_descriptor);
1727         wl->rx_descriptor = NULL;
1728
1729         ieee80211_free_hw(wl->hw);
1730
1731         if (wl->eeprom_dump != NULL)
1732                 kfree(wl->eeprom_dump);
1733
1734         return 0;
1735 }
1736 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1737
1738 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1739 MODULE_LICENSE("GPL");
1740 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1741 MODULE_FIRMWARE(WL1251_FW_NAME);