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_TX_RESULT) {
 283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 284                         wl1251_tx_complete(wl);
 285                 }
 286
 287                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
 288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 289                         wl1251_rx(wl);
 290
 291                         if ((intr & WL1251_ACX_INTR_RX1_DATA)
 292                             && skb_queue_len(&wl->tx_queue) > 0)
 293                                 wl1251_tx_work_unlocked(wl, false);
 294                 }
 295
 296                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
 297                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 298                         wl1251_rx(wl);
 299                 }
 300
 301                 if (intr & WL1251_ACX_INTR_EVENT_A) {
 302                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 303                         wl1251_event_handle(wl, 0);
 304                 }
 305
 306                 if (intr & WL1251_ACX_INTR_EVENT_B) {
 307                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 308                         wl1251_event_handle(wl, 1);
 309                 }
 310
 311                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 312                         wl1251_debug(DEBUG_IRQ,
 313                                      "WL1251_ACX_INTR_INIT_COMPLETE");
 314
 315                 if (skb_queue_len(&wl->tx_queue) > 0)
 316                         wl1251_tx_work_unlocked(wl, false);
 317
 318                 if (--ctr == 0)
 319                         break;
 320
 321                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 322         } while (intr);
 323
 324 out_sleep:
 325         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 326         wl1251_ps_elp_sleep(wl);
 327
 328 out:
 329         mutex_unlock(&wl->mutex);
 330         return IRQ_HANDLED;
 331 }
 332 EXPORT_SYMBOL_GPL(wl1251_irq);
 333
 334 static void wl1251_irq_work(struct work_struct *work)
 335 {
 336         struct wl1251 *wl =
 337                 container_of(work, struct wl1251, irq_work);
 338
 339         wl1251_irq(0, wl);
 340 }
 341
 342 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 343                        u16 beacon_interval, u8 dtim_period)
 344 {
 345         int ret;
 346
 347         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 348                                      DEFAULT_HW_GEN_MODULATION_TYPE,
 349                                      wl->tx_mgmt_frm_rate,
 350                                      wl->tx_mgmt_frm_mod);
 351         if (ret < 0)
 352                 goto out;
 353
 354         /*
 355          * Join command applies filters, and if we are not associated,
 356          * BSSID filter must be disabled for association to work.
 357          */
 358         if (is_zero_ether_addr(wl->bssid))
 359                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 360
 361         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 362                               dtim_period);
 363         if (ret < 0)
 364                 goto out;
 365
 366         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 367         if (ret < 0)
 368                 wl1251_warning("join timeout");
 369
 370         wl1251_no_ps_event(wl);
 371
 372 out:
 373         return ret;
 374 }
 375
 376 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 377 {
 378         struct wl1251 *wl = hw->priv;
 379         unsigned long flags;
 380
 381         skb_queue_tail(&wl->tx_queue, skb);
 382
 383         /*
 384          * The chip specific setup must run before the first TX packet -
 385          * before that, the tx_work will not be initialized!
 386          */
 387
 388         ieee80211_queue_work(wl->hw, &wl->tx_work);
 389
 390         /*
 391          * The workqueue is slow to process the tx_queue and we need stop
 392          * the queue here, otherwise the queue will get too long.
 393          */
 394         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 395                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 396
 397                 spin_lock_irqsave(&wl->wl_lock, flags);
 398                 ieee80211_stop_queues(wl->hw);
 399                 wl->tx_queue_stopped = true;
 400                 spin_unlock_irqrestore(&wl->wl_lock, flags);
 401         }
 402 }
 403
 404 static int wl1251_op_start(struct ieee80211_hw *hw)
 405 {
 406         struct wl1251 *wl = hw->priv;
 407         struct wiphy *wiphy = hw->wiphy;
 408         int ret = 0;
 409
 410         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 411
 412         mutex_lock(&wl->mutex);
 413
 414         if (wl->state != WL1251_STATE_OFF) {
 415                 wl1251_error("cannot start because not in off state: %d",
 416                              wl->state);
 417                 ret = -EBUSY;
 418                 goto out;
 419         }
 420
 421         ret = wl1251_chip_wakeup(wl);
 422         if (ret < 0)
 423                 goto out;
 424
 425         ret = wl1251_boot(wl);
 426         if (ret < 0)
 427                 goto out;
 428
 429         ret = wl1251_hw_init(wl);
 430         if (ret < 0)
 431                 goto out;
 432
 433         ret = wl1251_acx_station_id(wl);
 434         if (ret < 0)
 435                 goto out;
 436
 437         wl->state = WL1251_STATE_ON;
 438
 439         wl1251_info("firmware booted (%s)", wl->fw_ver);
 440
 441         /* update hw/fw version info in wiphy struct */
 442         wiphy->hw_version = wl->chip_id;
 443         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 444
 445 out:
 446         if (ret < 0)
 447                 wl1251_power_off(wl);
 448
 449         mutex_unlock(&wl->mutex);
 450
 451         return ret;
 452 }
 453
 454 static void wl1251_op_stop(struct ieee80211_hw *hw)
 455 {
 456         struct wl1251 *wl = hw->priv;
 457
 458         wl1251_info("down");
 459
 460         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 461
 462         mutex_lock(&wl->mutex);
 463
 464         WARN_ON(wl->state != WL1251_STATE_ON);
 465
 466         if (wl->scanning) {
 467                 ieee80211_scan_completed(wl->hw, true);
 468                 wl->scanning = false;
 469         }
 470
 471         wl->state = WL1251_STATE_OFF;
 472
 473         wl1251_disable_interrupts(wl);
 474
 475         mutex_unlock(&wl->mutex);
 476
 477         cancel_work_sync(&wl->irq_work);
 478         cancel_work_sync(&wl->tx_work);
 479         cancel_delayed_work_sync(&wl->ps_work);
 480         cancel_delayed_work_sync(&wl->elp_work);
 481
 482         mutex_lock(&wl->mutex);
 483
 484         /* let's notify MAC80211 about the remaining pending TX frames */
 485         wl1251_tx_flush(wl);
 486         wl1251_power_off(wl);
 487
 488         memset(wl->bssid, 0, ETH_ALEN);
 489         wl->listen_int = 1;
 490         wl->bss_type = MAX_BSS_TYPE;
 491
 492         wl->data_in_count = 0;
 493         wl->rx_counter = 0;
 494         wl->rx_handled = 0;
 495         wl->rx_current_buffer = 0;
 496         wl->rx_last_id = 0;
 497         wl->next_tx_complete = 0;
 498         wl->elp = false;
 499         wl->station_mode = STATION_ACTIVE_MODE;
 500         wl->tx_queue_stopped = false;
 501         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 502         wl->rssi_thold = 0;
 503         wl->channel = WL1251_DEFAULT_CHANNEL;
 504         wl->monitor_present = false;
 505         wl->joined = false;
 506         wl->long_doze_mode_set = false;
 507
 508         wl1251_debugfs_reset(wl);
 509
 510         mutex_unlock(&wl->mutex);
 511 }
 512
 513 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 514                                    struct ieee80211_vif *vif)
 515 {
 516         struct wl1251 *wl = hw->priv;
 517         int ret = 0;
 518
 519         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 520                      vif->type, vif->addr);
 521
 522         mutex_lock(&wl->mutex);
 523         if (wl->vif) {
 524                 ret = -EBUSY;
 525                 goto out;
 526         }
 527
 528         wl->vif = vif;
 529
 530         switch (vif->type) {
 531         case NL80211_IFTYPE_STATION:
 532                 wl->bss_type = BSS_TYPE_STA_BSS;
 533                 break;
 534         case NL80211_IFTYPE_ADHOC:
 535                 wl->bss_type = BSS_TYPE_IBSS;
 536                 break;
 537         default:
 538                 ret = -EOPNOTSUPP;
 539                 goto out;
 540         }
 541
 542         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
 543                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 544                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 545                 ret = wl1251_acx_station_id(wl);
 546                 if (ret < 0)
 547                         goto out;
 548         }
 549
 550 out:
 551         mutex_unlock(&wl->mutex);
 552         return ret;
 553 }
 554
 555 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 556                                          struct ieee80211_vif *vif)
 557 {
 558         struct wl1251 *wl = hw->priv;
 559
 560         mutex_lock(&wl->mutex);
 561         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 562         wl->vif = NULL;
 563         memset(wl->bssid, 0, ETH_ALEN);
 564         mutex_unlock(&wl->mutex);
 565 }
 566
 567 static int wl1251_build_null_data(struct wl1251 *wl)
 568 {
 569         struct sk_buff *skb = NULL;
 570         int size;
 571         void *ptr;
 572         int ret = -ENOMEM;
 573
 574
 575         if (wl->bss_type == BSS_TYPE_IBSS) {
 576                 size = sizeof(struct wl12xx_null_data_template);
 577                 ptr = NULL;
 578         } else {
 579                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
 580                 if (!skb)
 581                         goto out;
 582                 size = skb->len;
 583                 ptr = skb->data;
 584         }
 585
 586         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 587
 588 out:
 589         dev_kfree_skb(skb);
 590         if (ret)
 591                 wl1251_warning("cmd buld null data failed %d", ret);
 592
 593         return ret;
 594
 595 }
 596
 597 static int wl1251_build_qos_null_data(struct wl1251 *wl)
 598 {
 599         struct ieee80211_qos_hdr template;
 600
 601         memset(&template, 0, sizeof(template));
 602
 603         memcpy(template.addr1, wl->bssid, ETH_ALEN);
 604         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 605         memcpy(template.addr3, wl->bssid, ETH_ALEN);
 606
 607         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 608                                              IEEE80211_STYPE_QOS_NULLFUNC |
 609                                              IEEE80211_FCTL_TODS);
 610
 611         /* FIXME: not sure what priority to use here */
 612         template.qos_ctrl = cpu_to_le16(0);
 613
 614         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 615                                        sizeof(template));
 616 }
 617
 618 static void wl1251_ps_work(struct work_struct *work)
 619 {
 620         struct delayed_work *dwork;
 621         struct wl1251 *wl;
 622         unsigned long diff, wait;
 623         bool need_ps;
 624         bool have_ps;
 625         int ret;
 626         int i;
 627
 628         dwork = container_of(work, struct delayed_work, work);
 629         wl = container_of(dwork, struct wl1251, ps_work);
 630
 631         mutex_lock(&wl->mutex);
 632
 633         /* don't change PS modes while still transitioning, to avoid possbile
 634          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
 635         if (wl->ps_transitioning) {
 636                 diff = jiffies - wl->ps_change_jiffies;
 637                 if (diff > msecs_to_jiffies(500)) {
 638                         wl1251_error("PS change taking too long: %lu", diff);
 639                         wl->ps_transitioning = false;
 640                 } else {
 641                         //wl1251_error("PS still transitioning");
 642                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
 643                                 msecs_to_jiffies(50));
 644                         goto out;
 645                 }
 646         }
 647
 648         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
 649         need_ps = wl->psm_requested && !wl->bss_lost
 650                 && wl->rate < wl->ps_rate_threshold;
 651
 652         if (need_ps == have_ps) {
 653                 //wl1251_info("ps: already in mode %d", have_ps);
 654                 goto out;
 655         }
 656
 657         /* don't enter PS if there was recent activity */
 658         if (need_ps) {
 659                 wait = 0;
 660
 661                 diff = jiffies - wl->last_no_ps_jiffies[1];
 662                 if (diff < msecs_to_jiffies(1000))
 663                         wait = msecs_to_jiffies(1000) - diff + 1;
 664
 665                 diff = jiffies - wl->last_no_ps_jiffies[0];
 666                 if (diff < msecs_to_jiffies(3000))
 667                         wait += msecs_to_jiffies(1000);
 668
 669                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
 670                         if (wl->tx_frames[i] != NULL) {
 671                                 //wl1251_error("  frm %d busy", i);
 672                                 if (wait < msecs_to_jiffies(50))
 673                                         wait = msecs_to_jiffies(50);
 674                                 break;
 675                         }
 676                 }
 677
 678                 if (wait > 0) {
 679                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
 680                         goto out;
 681                 }
 682         }
 683
 684         ret = wl1251_ps_elp_wakeup(wl);
 685         if (ret < 0)
 686                 goto out;
 687
 688         if (need_ps) {
 689                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 690                                             wl->dtim_period);
 691         }
 692         ret = wl1251_ps_set_mode(wl,
 693                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
 694         if (ret < 0)
 695                 goto out_sleep;
 696
 697         // wl1251_info("psm %d, r %u", need_ps, wl->rate);
 698
 699 out_sleep:
 700         wl1251_ps_elp_sleep(wl);
 701
 702 out:
 703         mutex_unlock(&wl->mutex);
 704 }
 705
 706 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 707 {
 708         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 709 }
 710
 711 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
 712 {
 713         struct wl1251 *wl = hw->priv;
 714         struct ieee80211_conf *conf = &hw->conf;
 715         int channel, ret = 0;
 716
 717         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
 718
 719         wl1251_debug(DEBUG_MAC80211,
 720                      "mac80211 config ch %d monitor %s psm %s power %d",
 721                      channel,
 722                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 723                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 724                      conf->power_level);
 725
 726         mutex_lock(&wl->mutex);
 727
 728         ret = wl1251_ps_elp_wakeup(wl);
 729         if (ret < 0)
 730                 goto out;
 731
 732         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 733                 u32 mode;
 734
 735                 if (conf->flags & IEEE80211_CONF_MONITOR) {
 736                         wl->monitor_present = true;
 737                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 738                 } else {
 739                         wl->monitor_present = false;
 740                         mode = 0;
 741                 }
 742
 743                 ret = wl1251_acx_feature_cfg(wl, mode);
 744                 if (ret < 0)
 745                         goto out_sleep;
 746         }
 747
 748         if (channel != wl->channel) {
 749                 wl->channel = channel;
 750
 751                 /*
 752                  * Use ENABLE_RX command for channel switching when no
 753                  * interface is present (monitor mode only).
 754                  * This leaves the tx path disabled in firmware, whereas
 755                  * the usual JOIN command seems to transmit some frames
 756                  * at firmware level.
 757                  *
 758                  * Note that bss_type must be BSS_TYPE_STA_BSS, also at least
 759                  * one join has to be performed before CMD_ENABLE_RX can
 760                  * properly switch channels (join will be done by CONF_IDLE).
 761                  */
 762                 if (wl->vif == NULL) {
 763                         wl->bss_type = BSS_TYPE_STA_BSS;
 764                         wl->joined = false;
 765                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 766                 } else {
 767                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 768                                           wl->beacon_int, wl->dtim_period);
 769                 }
 770                 if (ret < 0)
 771                         goto out_sleep;
 772         }
 773
 774         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 775                 wl1251_debug(DEBUG_PSM, "psm enabled");
 776
 777                 wl->psm_requested = true;
 778
 779                 wl->dtim_period = conf->ps_dtim_period;
 780
 781                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 782         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 783                 wl1251_debug(DEBUG_PSM, "psm disabled");
 784
 785                 wl->psm_requested = false;
 786
 787                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
 788         }
 789
 790         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
 791                 if (conf->flags & IEEE80211_CONF_IDLE) {
 792                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 793                         if (ret < 0)
 794                                 goto out_sleep;
 795                 } else {
 796                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 797                         if (ret < 0)
 798                                 goto out_sleep;
 799
 800                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
 801                         if (ret < 0)
 802                                 wl1251_error("error waiting for wakeup");
 803
 804                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
 805                                           wl->beacon_int, wl->dtim_period);
 806                         if (ret < 0)
 807                                 goto out_sleep;
 808                 }
 809         }
 810
 811         if (conf->power_level != wl->power_level) {
 812                 ret = wl1251_acx_tx_power(wl, conf->power_level);
 813                 if (ret < 0)
 814                         goto out_sleep;
 815
 816                 wl->power_level = conf->power_level;
 817         }
 818
 819 out_sleep:
 820         wl1251_ps_elp_sleep(wl);
 821
 822 out:
 823         mutex_unlock(&wl->mutex);
 824
 825         return ret;
 826 }
 827
 828 struct wl1251_filter_params {
 829         bool enabled;
 830         int mc_list_length;
 831         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 832 };
 833
 834 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 835                                        struct netdev_hw_addr_list *mc_list)
 836 {
 837         struct wl1251_filter_params *fp;
 838         struct netdev_hw_addr *ha;
 839         struct wl1251 *wl = hw->priv;
 840
 841         if (unlikely(wl->state == WL1251_STATE_OFF))
 842                 return 0;
 843
 844         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 845         if (!fp) {
 846                 wl1251_error("Out of memory setting filters.");
 847                 return 0;
 848         }
 849
 850         /* update multicast filtering parameters */
 851         fp->mc_list_length = 0;
 852         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 853                 fp->enabled = false;
 854         } else {
 855                 fp->enabled = true;
 856                 netdev_hw_addr_list_for_each(ha, mc_list) {
 857                         memcpy(fp->mc_list[fp->mc_list_length],
 858                                         ha->addr, ETH_ALEN);
 859                         fp->mc_list_length++;
 860                 }
 861         }
 862
 863         return (u64)(unsigned long)fp;
 864 }
 865
 866 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
 867                                   FIF_ALLMULTI | \
 868                                   FIF_FCSFAIL | \
 869                                   FIF_BCN_PRBRESP_PROMISC | \
 870                                   FIF_CONTROL | \
 871                                   FIF_OTHER_BSS | \
 872                                   FIF_PROBE_REQ)
 873
 874 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 875                                        unsigned int changed,
 876                                        unsigned int *total, u64 multicast)
 877 {
 878         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 879         struct wl1251 *wl = hw->priv;
 880         int ret;
 881
 882         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 883
 884         *total &= WL1251_SUPPORTED_FILTERS;
 885         changed &= WL1251_SUPPORTED_FILTERS;
 886
 887         if (changed == 0) {
 888                 /* no filters which we support changed */
 889                 kfree(fp);
 890                 return;
 891         }
 892
 893         mutex_lock(&wl->mutex);
 894
 895         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 896         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 897
 898         if (*total & FIF_PROMISC_IN_BSS) {
 899                 wl->rx_config |= CFG_BSSID_FILTER_EN;
 900                 wl->rx_config |= CFG_RX_ALL_GOOD;
 901         }
 902         if (*total & FIF_ALLMULTI)
 903                 /*
 904                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 905                  * all multicast frames
 906                  */
 907                 wl->rx_config &= ~CFG_MC_FILTER_EN;
 908         if (*total & FIF_FCSFAIL)
 909                 wl->rx_filter |= CFG_RX_FCS_ERROR;
 910         if (*total & FIF_BCN_PRBRESP_PROMISC) {
 911                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 912                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
 913         }
 914         if (*total & FIF_CONTROL)
 915                 wl->rx_filter |= CFG_RX_CTL_EN;
 916         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 917                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 918         if (*total & FIF_PROBE_REQ)
 919                 wl->rx_filter |= CFG_RX_PREQ_EN;
 920
 921         if (wl->state == WL1251_STATE_OFF)
 922                 goto out;
 923
 924         ret = wl1251_ps_elp_wakeup(wl);
 925         if (ret < 0)
 926                 goto out;
 927
 928         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
 929                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 930         else if (fp)
 931                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 932                                                    fp->mc_list,
 933                                                    fp->mc_list_length);
 934         if (ret < 0)
 935                 goto out;
 936
 937         /* send filters to firmware */
 938         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 939
 940         wl1251_ps_elp_sleep(wl);
 941
 942 out:
 943         mutex_unlock(&wl->mutex);
 944         kfree(fp);
 945 }
 946
 947 /* HW encryption */
 948 static int wl1251_set_key_type(struct wl1251 *wl,
 949                                struct wl1251_cmd_set_keys *key,
 950                                enum set_key_cmd cmd,
 951                                struct ieee80211_key_conf *mac80211_key,
 952                                const u8 *addr)
 953 {
 954         switch (mac80211_key->cipher) {
 955         case WLAN_CIPHER_SUITE_WEP40:
 956         case WLAN_CIPHER_SUITE_WEP104:
 957                 if (is_broadcast_ether_addr(addr))
 958                         key->key_type = KEY_WEP_DEFAULT;
 959                 else
 960                         key->key_type = KEY_WEP_ADDR;
 961
 962                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 963                 break;
 964         case WLAN_CIPHER_SUITE_TKIP:
 965                 if (is_broadcast_ether_addr(addr))
 966                         key->key_type = KEY_TKIP_MIC_GROUP;
 967                 else
 968                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
 969
 970                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
 971                 break;
 972         case WLAN_CIPHER_SUITE_CCMP:
 973                 if (is_broadcast_ether_addr(addr))
 974                         key->key_type = KEY_AES_GROUP;
 975                 else
 976                         key->key_type = KEY_AES_PAIRWISE;
 977                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 978                 break;
 979         default:
 980                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 981                 return -EOPNOTSUPP;
 982         }
 983
 984         return 0;
 985 }
 986
 987 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 988                              struct ieee80211_vif *vif,
 989                              struct ieee80211_sta *sta,
 990                              struct ieee80211_key_conf *key)
 991 {
 992         struct wl1251 *wl = hw->priv;
 993         struct wl1251_cmd_set_keys *wl_cmd;
 994         const u8 *addr;
 995         int ret;
 996
 997         static const u8 bcast_addr[ETH_ALEN] =
 998                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 999
1000         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
1001
1002         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
1003         if (!wl_cmd) {
1004                 ret = -ENOMEM;
1005                 goto out;
1006         }
1007
1008         addr = sta ? sta->addr : bcast_addr;
1009
1010         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
1011         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
1012         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
1013                      key->cipher, key->keyidx, key->keylen, key->flags);
1014         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
1015
1016         if (is_zero_ether_addr(addr)) {
1017                 /* We dont support TX only encryption */
1018                 ret = -EOPNOTSUPP;
1019                 goto out;
1020         }
1021
1022         mutex_lock(&wl->mutex);
1023
1024         switch (cmd) {
1025         case SET_KEY:
1026                 if (wl->monitor_present) {
1027                         ret = -EOPNOTSUPP;
1028                         goto out_unlock;
1029                 }
1030                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1031                 break;
1032         case DISABLE_KEY:
1033                 wl_cmd->key_action = KEY_REMOVE;
1034                 break;
1035         default:
1036                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1037                 break;
1038         }
1039
1040         ret = wl1251_ps_elp_wakeup(wl);
1041         if (ret < 0)
1042                 goto out_unlock;
1043
1044         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1045         if (ret < 0) {
1046                 wl1251_error("Set KEY type failed");
1047                 goto out_sleep;
1048         }
1049
1050         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1051                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1052
1053         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1054             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1055                 /*
1056                  * We get the key in the following form:
1057                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1058                  * but the target is expecting:
1059                  * TKIP - RX MIC - TX MIC
1060                  */
1061                 memcpy(wl_cmd->key, key->key, 16);
1062                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1063                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1064
1065         } else {
1066                 memcpy(wl_cmd->key, key->key, key->keylen);
1067         }
1068         wl_cmd->key_size = key->keylen;
1069
1070         wl_cmd->id = key->keyidx;
1071         wl_cmd->ssid_profile = 0;
1072
1073         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1074
1075         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1076         if (ret < 0) {
1077                 wl1251_warning("could not set keys");
1078                 goto out_sleep;
1079         }
1080
1081 out_sleep:
1082         wl1251_ps_elp_sleep(wl);
1083
1084 out_unlock:
1085         mutex_unlock(&wl->mutex);
1086
1087 out:
1088         kfree(wl_cmd);
1089
1090         return ret;
1091 }
1092
1093 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1094                              struct ieee80211_vif *vif,
1095                              struct cfg80211_scan_request *req)
1096 {
1097         struct wl1251 *wl = hw->priv;
1098         struct sk_buff *skb;
1099         size_t ssid_len = 0;
1100         u8 *ssid = NULL;
1101         int ret;
1102
1103         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1104
1105         if (req->n_ssids) {
1106                 ssid = req->ssids[0].ssid;
1107                 ssid_len = req->ssids[0].ssid_len;
1108         }
1109
1110         mutex_lock(&wl->mutex);
1111
1112         if (wl->scanning) {
1113                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1114                 ret = -EINVAL;
1115                 goto out;
1116         }
1117
1118         ret = wl1251_ps_elp_wakeup(wl);
1119         if (ret < 0)
1120                 goto out;
1121
1122         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1123                                      req->ie, req->ie_len);
1124         if (!skb) {
1125                 ret = -ENOMEM;
1126                 goto out;
1127         }
1128
1129         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1130                                       skb->len);
1131         dev_kfree_skb(skb);
1132         if (ret < 0)
1133                 goto out_sleep;
1134
1135         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1136         if (ret < 0)
1137                 goto out_sleep;
1138
1139         wl->scanning = true;
1140
1141         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1142                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1143         if (ret < 0) {
1144                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1145                 wl->scanning = false;
1146                 goto out_sleep;
1147         }
1148
1149 out_sleep:
1150         wl1251_ps_elp_sleep(wl);
1151
1152 out:
1153         mutex_unlock(&wl->mutex);
1154
1155         return ret;
1156 }
1157
1158 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1159 {
1160         struct wl1251 *wl = hw->priv;
1161         int ret;
1162
1163         mutex_lock(&wl->mutex);
1164
1165         ret = wl1251_ps_elp_wakeup(wl);
1166         if (ret < 0)
1167                 goto out;
1168
1169         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1170         if (ret < 0)
1171                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1172
1173         wl1251_ps_elp_sleep(wl);
1174
1175 out:
1176         mutex_unlock(&wl->mutex);
1177
1178         return ret;
1179 }
1180
1181 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1182                                        struct ieee80211_vif *vif,
1183                                        struct ieee80211_bss_conf *bss_conf,
1184                                        u32 changed)
1185 {
1186         struct wl1251 *wl = hw->priv;
1187         struct sk_buff *beacon, *skb;
1188         bool do_join = false;
1189         bool enable;
1190         int ret;
1191
1192         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1193
1194         mutex_lock(&wl->mutex);
1195
1196         ret = wl1251_ps_elp_wakeup(wl);
1197         if (ret < 0)
1198                 goto out;
1199
1200         if (changed & BSS_CHANGED_CQM) {
1201                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1202                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1203                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1204                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1205                 if (ret < 0)
1206                         goto out;
1207                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1208         }
1209
1210         if ((changed & BSS_CHANGED_BSSID) &&
1211             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1212                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1213
1214                 if (!is_zero_ether_addr(wl->bssid)) {
1215                         ret = wl1251_build_null_data(wl);
1216                         if (ret < 0)
1217                                 goto out_sleep;
1218
1219                         ret = wl1251_build_qos_null_data(wl);
1220                         if (ret < 0)
1221                                 goto out_sleep;
1222
1223                         do_join = true;
1224                 }
1225         }
1226
1227         if (changed & BSS_CHANGED_ASSOC) {
1228                 if (bss_conf->assoc) {
1229                         wl->beacon_int = bss_conf->beacon_int;
1230
1231                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1232                         if (!skb)
1233                                 goto out_sleep;
1234
1235                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1236                                                       skb->data,
1237                                                       skb->len);
1238                         dev_kfree_skb(skb);
1239                         if (ret < 0)
1240                                 goto out_sleep;
1241
1242                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1243                         if (ret < 0)
1244                                 goto out_sleep;
1245                 } else {
1246                         /* use defaults when not associated */
1247                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1248                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1249                 }
1250         }
1251         if (changed & BSS_CHANGED_ERP_SLOT) {
1252                 if (bss_conf->use_short_slot)
1253                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1254                 else
1255                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1256                 if (ret < 0) {
1257                         wl1251_warning("Set slot time failed %d", ret);
1258                         goto out_sleep;
1259                 }
1260         }
1261
1262         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1263                 if (bss_conf->use_short_preamble)
1264                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1265                 else
1266                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1267         }
1268
1269         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1270                 if (bss_conf->use_cts_prot)
1271                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1272                 else
1273                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1274                 if (ret < 0) {
1275                         wl1251_warning("Set ctsprotect failed %d", ret);
1276                         goto out_sleep;
1277                 }
1278         }
1279
1280         if (changed & BSS_CHANGED_ARP_FILTER) {
1281                 __be32 addr = bss_conf->arp_addr_list[0];
1282                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1283
1284                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1285                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1286
1287                 if (ret < 0)
1288                         goto out_sleep;
1289         }
1290
1291         if (changed & BSS_CHANGED_BEACON) {
1292                 beacon = ieee80211_beacon_get(hw, vif);
1293                 if (!beacon)
1294                         goto out_sleep;
1295
1296                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1297                                               beacon->len);
1298
1299                 if (ret < 0) {
1300                         dev_kfree_skb(beacon);
1301                         goto out_sleep;
1302                 }
1303
1304                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1305                                               beacon->len);
1306
1307                 dev_kfree_skb(beacon);
1308
1309                 if (ret < 0)
1310                         goto out_sleep;
1311
1312                 do_join = true;
1313         }
1314
1315         if (do_join) {
1316                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1317                                   wl->beacon_int, wl->dtim_period);
1318                 if (ret < 0)
1319                         goto out_sleep;
1320         }
1321
1322 out_sleep:
1323         wl1251_ps_elp_sleep(wl);
1324
1325 out:
1326         mutex_unlock(&wl->mutex);
1327 }
1328
1329
1330 /* can't be const, mac80211 writes to this */
1331 static struct ieee80211_rate wl1251_rates[] = {
1332         { .bitrate = 10,
1333           .hw_value = 0x1,
1334           .hw_value_short = 0x1, },
1335         { .bitrate = 20,
1336           .hw_value = 0x2,
1337           .hw_value_short = 0x2,
1338           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1339         { .bitrate = 55,
1340           .hw_value = 0x4,
1341           .hw_value_short = 0x4,
1342           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1343         { .bitrate = 110,
1344           .hw_value = 0x20,
1345           .hw_value_short = 0x20,
1346           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1347         { .bitrate = 60,
1348           .hw_value = 0x8,
1349           .hw_value_short = 0x8, },
1350         { .bitrate = 90,
1351           .hw_value = 0x10,
1352           .hw_value_short = 0x10, },
1353         { .bitrate = 120,
1354           .hw_value = 0x40,
1355           .hw_value_short = 0x40, },
1356         { .bitrate = 180,
1357           .hw_value = 0x80,
1358           .hw_value_short = 0x80, },
1359         { .bitrate = 240,
1360           .hw_value = 0x200,
1361           .hw_value_short = 0x200, },
1362         { .bitrate = 360,
1363          .hw_value = 0x400,
1364          .hw_value_short = 0x400, },
1365         { .bitrate = 480,
1366           .hw_value = 0x800,
1367           .hw_value_short = 0x800, },
1368         { .bitrate = 540,
1369           .hw_value = 0x1000,
1370           .hw_value_short = 0x1000, },
1371 };
1372
1373 /* can't be const, mac80211 writes to this */
1374 static struct ieee80211_channel wl1251_channels[] = {
1375         { .hw_value = 1, .center_freq = 2412},
1376         { .hw_value = 2, .center_freq = 2417},
1377         { .hw_value = 3, .center_freq = 2422},
1378         { .hw_value = 4, .center_freq = 2427},
1379         { .hw_value = 5, .center_freq = 2432},
1380         { .hw_value = 6, .center_freq = 2437},
1381         { .hw_value = 7, .center_freq = 2442},
1382         { .hw_value = 8, .center_freq = 2447},
1383         { .hw_value = 9, .center_freq = 2452},
1384         { .hw_value = 10, .center_freq = 2457},
1385         { .hw_value = 11, .center_freq = 2462},
1386         { .hw_value = 12, .center_freq = 2467},
1387         { .hw_value = 13, .center_freq = 2472},
1388 };
1389
1390 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1391                              struct ieee80211_vif *vif, u16 queue,
1392                              const struct ieee80211_tx_queue_params *params)
1393 {
1394         enum wl1251_acx_ps_scheme ps_scheme;
1395         struct wl1251 *wl = hw->priv;
1396         int ret;
1397
1398         mutex_lock(&wl->mutex);
1399
1400         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1401
1402         ret = wl1251_ps_elp_wakeup(wl);
1403         if (ret < 0)
1404                 goto out;
1405
1406         /* mac80211 uses units of 32 usec */
1407         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1408                                 params->cw_min, params->cw_max,
1409                                 params->aifs, params->txop * 32);
1410         if (ret < 0)
1411                 goto out_sleep;
1412
1413         if (params->uapsd)
1414                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1415         else
1416                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1417
1418         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1419                                  CHANNEL_TYPE_EDCF,
1420                                  wl1251_tx_get_queue(queue), ps_scheme,
1421                                  WL1251_ACX_ACK_POLICY_LEGACY);
1422         if (ret < 0)
1423                 goto out_sleep;
1424
1425 out_sleep:
1426         wl1251_ps_elp_sleep(wl);
1427
1428 out:
1429         mutex_unlock(&wl->mutex);
1430
1431         return ret;
1432 }
1433
1434 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1435                                 struct survey_info *survey)
1436 {
1437         struct wl1251 *wl = hw->priv;
1438         struct ieee80211_conf *conf = &hw->conf;
1439
1440         if (idx != 0)
1441                 return -ENOENT;
1442
1443         survey->channel = conf->channel;
1444         survey->filled = SURVEY_INFO_NOISE_DBM;
1445         survey->noise = wl->noise;
1446
1447         return 0;
1448 }
1449
1450 /* can't be const, mac80211 writes to this */
1451 static struct ieee80211_supported_band wl1251_band_2ghz = {
1452         .channels = wl1251_channels,
1453         .n_channels = ARRAY_SIZE(wl1251_channels),
1454         .bitrates = wl1251_rates,
1455         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1456 };
1457
1458 static const struct ieee80211_ops wl1251_ops = {
1459         .start = wl1251_op_start,
1460         .stop = wl1251_op_stop,
1461         .add_interface = wl1251_op_add_interface,
1462         .remove_interface = wl1251_op_remove_interface,
1463         .config = wl1251_op_config,
1464         .prepare_multicast = wl1251_op_prepare_multicast,
1465         .configure_filter = wl1251_op_configure_filter,
1466         .tx = wl1251_op_tx,
1467         .set_key = wl1251_op_set_key,
1468         .hw_scan = wl1251_op_hw_scan,
1469         .bss_info_changed = wl1251_op_bss_info_changed,
1470         .set_rts_threshold = wl1251_op_set_rts_threshold,
1471         .conf_tx = wl1251_op_conf_tx,
1472         .get_survey = wl1251_op_get_survey,
1473 };
1474
1475 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1476 {
1477         unsigned long timeout;
1478
1479         wl1251_reg_write32(wl, EE_ADDR, offset);
1480         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1481
1482         /* EE_CTL_READ clears when data is ready */
1483         timeout = jiffies + msecs_to_jiffies(100);
1484         while (1) {
1485                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1486                         break;
1487
1488                 if (time_after(jiffies, timeout))
1489                         return -ETIMEDOUT;
1490
1491                 msleep(1);
1492         }
1493
1494         *data = wl1251_reg_read32(wl, EE_DATA);
1495         return 0;
1496 }
1497
1498 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1499                               u8 *data, size_t len)
1500 {
1501         size_t i;
1502         int ret;
1503
1504         wl1251_reg_write32(wl, EE_START, 0);
1505
1506         for (i = 0; i < len; i++) {
1507                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1508                 if (ret < 0)
1509                         return ret;
1510         }
1511
1512         return 0;
1513 }
1514
1515 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1516 {
1517         u8 mac[ETH_ALEN];
1518         int i, ret;
1519
1520         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1521
1522         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1523         if (ret < 0) {
1524                 wl1251_warning("failed to read MAC address from EEPROM");
1525                 return ret;
1526         }
1527
1528         /* MAC is stored in reverse order */
1529         for (i = 0; i < ETH_ALEN; i++)
1530                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1531
1532         return 0;
1533 }
1534
1535 /* temporary (?) hack for EEPROM dumping
1536  * (it seems this can only be done before fw is running) */
1537 static int wl1251_dump_eeprom(struct wl1251 *wl)
1538 {
1539         int ret;
1540
1541         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1542
1543         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1544         if (wl->eeprom_dump == NULL) {
1545                 ret = -ENOMEM;
1546                 goto out;
1547         }
1548
1549         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1550         if (ret != 0) {
1551                 wl1251_error("eeprom dump failed: %d", ret);
1552                 kfree(wl->eeprom_dump);
1553                 wl->eeprom_dump = NULL;
1554                 goto out;
1555         }
1556
1557         wl1251_info("eeprom dumped.");
1558
1559 out:
1560         return ret;
1561 }
1562
1563 static int wl1251_register_hw(struct wl1251 *wl)
1564 {
1565         int ret;
1566
1567         if (wl->mac80211_registered)
1568                 return 0;
1569
1570         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1571
1572         ret = ieee80211_register_hw(wl->hw);
1573         if (ret < 0) {
1574                 wl1251_error("unable to register mac80211 hw: %d", ret);
1575                 return ret;
1576         }
1577
1578         wl->mac80211_registered = true;
1579
1580         wl1251_notice("loaded");
1581
1582         return 0;
1583 }
1584
1585 int wl1251_init_ieee80211(struct wl1251 *wl)
1586 {
1587         int ret;
1588
1589         /* The tx descriptor buffer and the TKIP space */
1590         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1591                 + WL1251_TKIP_IV_SPACE;
1592
1593         /* unit us */
1594         /* FIXME: find a proper value */
1595         wl->hw->channel_change_time = 10000;
1596
1597         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1598                 IEEE80211_HW_SUPPORTS_PS |
1599                 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
1600                 IEEE80211_HW_BEACON_FILTER |
1601                 IEEE80211_HW_SUPPORTS_UAPSD |
1602                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1603
1604         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1605                                          BIT(NL80211_IFTYPE_ADHOC);
1606         wl->hw->wiphy->max_scan_ssids = 1;
1607         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1608
1609         wl->hw->queues = 4;
1610
1611         if (wl->use_eeprom)
1612                 wl1251_read_eeprom_mac(wl);
1613         if (wl->dump_eeprom)
1614                 wl1251_dump_eeprom(wl);
1615
1616         ret = wl1251_register_hw(wl);
1617         if (ret)
1618                 goto out;
1619
1620         wl1251_debugfs_init(wl);
1621         wl1251_notice("initialized");
1622
1623         ret = 0;
1624
1625 out:
1626         return ret;
1627 }
1628 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1629
1630 struct ieee80211_hw *wl1251_alloc_hw(void)
1631 {
1632         struct ieee80211_hw *hw;
1633         struct wl1251 *wl;
1634         int i;
1635         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1636
1637         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1638         if (!hw) {
1639                 wl1251_error("could not alloc ieee80211_hw");
1640                 return ERR_PTR(-ENOMEM);
1641         }
1642
1643         wl = hw->priv;
1644         memset(wl, 0, sizeof(*wl));
1645
1646         wl->hw = hw;
1647
1648         wl->data_in_count = 0;
1649
1650         skb_queue_head_init(&wl->tx_queue);
1651
1652         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1653         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1654         wl->channel = WL1251_DEFAULT_CHANNEL;
1655         wl->monitor_present = false;
1656         wl->joined = false;
1657         wl->scanning = false;
1658         wl->bss_type = MAX_BSS_TYPE;
1659         wl->default_key = 0;
1660         wl->listen_int = 1;
1661         wl->rx_counter = 0;
1662         wl->rx_handled = 0;
1663         wl->rx_current_buffer = 0;
1664         wl->rx_last_id = 0;
1665         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1666         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1667         wl->elp = false;
1668         wl->station_mode = STATION_ACTIVE_MODE;
1669         wl->psm_requested = false;
1670         wl->tx_queue_stopped = false;
1671         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1672         wl->rssi_thold = 0;
1673         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1674         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1675         wl->vif = NULL;
1676         wl->ps_rate_threshold = 100000;
1677
1678         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1679                 wl->tx_frames[i] = NULL;
1680
1681         wl->next_tx_complete = 0;
1682
1683         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1684         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1685
1686         /*
1687          * In case our MAC address is not correctly set,
1688          * we use a random but Nokia MAC.
1689          */
1690         memcpy(wl->mac_addr, nokia_oui, 3);
1691         get_random_bytes(wl->mac_addr + 3, 3);
1692
1693         wl->state = WL1251_STATE_OFF;
1694         mutex_init(&wl->mutex);
1695
1696         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1697         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1698
1699         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1700         if (!wl->rx_descriptor) {
1701                 wl1251_error("could not allocate memory for rx descriptor");
1702                 ieee80211_free_hw(hw);
1703                 return ERR_PTR(-ENOMEM);
1704         }
1705
1706         return hw;
1707 }
1708 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1709
1710 int wl1251_free_hw(struct wl1251 *wl)
1711 {
1712         ieee80211_unregister_hw(wl->hw);
1713
1714         wl1251_debugfs_exit(wl);
1715
1716         kfree(wl->target_mem_map);
1717         kfree(wl->data_path);
1718         vfree(wl->fw);
1719         wl->fw = NULL;
1720         kfree(wl->nvs);
1721         wl->nvs = NULL;
1722
1723         kfree(wl->rx_descriptor);
1724         wl->rx_descriptor = NULL;
1725
1726         ieee80211_free_hw(wl->hw);
1727
1728         if (wl->eeprom_dump != NULL)
1729                 kfree(wl->eeprom_dump);
1730
1731         return 0;
1732 }
1733 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1734
1735 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1736 MODULE_LICENSE("GPL");
1737 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1738 MODULE_FIRMWARE(WL1251_FW_NAME);