78f6e7fe425218127db520586f9f0d6aa639bca2
[pandora-wifi.git] / drivers / net / wireless / wl12xx / wl1251_main.c
1 /*
2  * This file is part of wl1251
3  *
4  * Copyright (C) 2008-2009 Nokia Corporation
5  *
6  * Contact: Kalle Valo <kalle.valo@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23
24 #include <linux/module.h>
25 #include <linux/interrupt.h>
26 #include <linux/firmware.h>
27 #include <linux/delay.h>
28 #include <linux/irq.h>
29 #if (LINUX_VERSION_CODE == KERNEL_VERSION(2,6,28))
30 #include <linux/device.h>
31 #endif
32 #include <linux/crc32.h>
33 #include <linux/etherdevice.h>
34 #include <linux/vmalloc.h>
35
36 #include "wl1251.h"
37 #include "wl12xx_80211.h"
38 #include "wl1251_reg.h"
39 #include "wl1251_io.h"
40 #include "wl1251_cmd.h"
41 #include "wl1251_event.h"
42 #include "wl1251_tx.h"
43 #include "wl1251_rx.h"
44 #include "wl1251_ps.h"
45 #include "wl1251_init.h"
46 #include "wl1251_debugfs.h"
47 #include "wl1251_boot.h"
48
49 void wl1251_enable_interrupts(struct wl1251 *wl)
50 {
51         wl->if_ops->enable_irq(wl);
52 }
53
54 void wl1251_disable_interrupts(struct wl1251 *wl)
55 {
56         wl->if_ops->disable_irq(wl);
57 }
58
59 static void wl1251_power_off(struct wl1251 *wl)
60 {
61         wl->set_power(false);
62 }
63
64 static void wl1251_power_on(struct wl1251 *wl)
65 {
66         wl->set_power(true);
67 }
68
69 static int wl1251_fetch_firmware(struct wl1251 *wl)
70 {
71         const struct firmware *fw;
72         struct device *dev = wiphy_dev(wl->hw->wiphy);
73         int ret;
74
75         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
76
77         if (ret < 0) {
78                 wl1251_error("could not get firmware: %d", ret);
79                 return ret;
80         }
81
82         if (fw->size % 4) {
83                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
84                              fw->size);
85                 ret = -EILSEQ;
86                 goto out;
87         }
88
89         wl->fw_len = fw->size;
90         wl->fw = vmalloc(wl->fw_len);
91
92         if (!wl->fw) {
93                 wl1251_error("could not allocate memory for the firmware");
94                 ret = -ENOMEM;
95                 goto out;
96         }
97
98         memcpy(wl->fw, fw->data, wl->fw_len);
99
100         ret = 0;
101
102 out:
103         release_firmware(fw);
104
105         return ret;
106 }
107
108 static int wl1251_fetch_nvs(struct wl1251 *wl)
109 {
110         const struct firmware *fw;
111         struct device *dev = wiphy_dev(wl->hw->wiphy);
112         int ret;
113
114         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
115
116         if (ret < 0) {
117                 wl1251_error("could not get nvs file: %d", ret);
118                 return ret;
119         }
120
121         if (fw->size % 4) {
122                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
123                              fw->size);
124                 ret = -EILSEQ;
125                 goto out;
126         }
127
128         wl->nvs_len = fw->size;
129         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
130
131         if (!wl->nvs) {
132                 wl1251_error("could not allocate memory for the nvs file");
133                 ret = -ENOMEM;
134                 goto out;
135         }
136
137         memcpy(wl->nvs, fw->data, wl->nvs_len);
138
139         ret = 0;
140
141 out:
142         release_firmware(fw);
143
144         return ret;
145 }
146
147 static void wl1251_fw_wakeup(struct wl1251 *wl)
148 {
149         u32 elp_reg;
150
151         elp_reg = ELPCTRL_WAKE_UP;
152         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
153         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
154
155         if (!(elp_reg & ELPCTRL_WLAN_READY))
156                 wl1251_warning("WLAN not ready");
157 }
158
159 static int wl1251_chip_wakeup(struct wl1251 *wl)
160 {
161         int ret = 0;
162
163         wl1251_power_on(wl);
164         msleep(WL1251_POWER_ON_SLEEP);
165         wl->if_ops->reset(wl);
166
167         /* We don't need a real memory partition here, because we only want
168          * to use the registers at this point. */
169         wl1251_set_partition(wl,
170                              0x00000000,
171                              0x00000000,
172                              REGISTERS_BASE,
173                              REGISTERS_DOWN_SIZE);
174
175         /* ELP module wake up */
176         wl1251_fw_wakeup(wl);
177
178         /* whal_FwCtrl_BootSm() */
179
180         /* 0. read chip id from CHIP_ID */
181         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
182
183         /* 1. check if chip id is valid */
184
185         switch (wl->chip_id) {
186         case CHIP_ID_1251_PG12:
187                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
188                              wl->chip_id);
189                 break;
190         case CHIP_ID_1251_PG11:
191                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
192                              wl->chip_id);
193                 break;
194         case CHIP_ID_1251_PG10:
195         default:
196                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
197                 ret = -ENODEV;
198                 goto out;
199         }
200
201         if (wl->fw == NULL) {
202                 ret = wl1251_fetch_firmware(wl);
203                 if (ret < 0)
204                         goto out;
205         }
206
207         if (wl->nvs == NULL && !wl->use_eeprom) {
208                 /* No NVS from netlink, try to get it from the filesystem */
209                 ret = wl1251_fetch_nvs(wl);
210                 if (ret < 0)
211                         goto out;
212         }
213
214 out:
215         return ret;
216 }
217
218 #define WL1251_IRQ_LOOP_COUNT 10
219 static void wl1251_irq_work(struct work_struct *work)
220 {
221         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
222         struct wl1251 *wl =
223                 container_of(work, struct wl1251, irq_work);
224         int ret;
225
226         mutex_lock(&wl->mutex);
227
228         wl1251_debug(DEBUG_IRQ, "IRQ work");
229
230         if (wl->state == WL1251_STATE_OFF)
231                 goto out;
232
233         ret = wl1251_ps_elp_wakeup(wl);
234         if (ret < 0)
235                 goto out;
236
237         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
238
239         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
240         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
241
242         do {
243                 if (wl->data_path) {
244                         wl->rx_counter = wl1251_mem_read32(
245                                 wl, wl->data_path->rx_control_addr);
246
247                         /* We handle a frmware bug here */
248                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
249                         case 0:
250                                 wl1251_debug(DEBUG_IRQ,
251                                              "RX: FW and host in sync");
252                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
253                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
254                                 break;
255                         case 1:
256                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
257                                 intr |= WL1251_ACX_INTR_RX0_DATA;
258                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
259                                 break;
260                         case 2:
261                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
262                                 intr |= WL1251_ACX_INTR_RX0_DATA;
263                                 intr |= WL1251_ACX_INTR_RX1_DATA;
264                                 break;
265                         default:
266                                 wl1251_warning(
267                                         "RX: FW and host out of sync: %d",
268                                         wl->rx_counter - wl->rx_handled);
269                                 break;
270                         }
271
272                         wl->rx_handled = wl->rx_counter;
273
274                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
275                                      wl->rx_counter);
276                 }
277
278                 intr &= wl->intr_mask;
279
280                 if (intr == 0) {
281                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
282                         goto out_sleep;
283                 }
284
285                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
286                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
287                         wl1251_rx(wl);
288                 }
289
290                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
291                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
292                         wl1251_rx(wl);
293                 }
294
295                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
296                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
297                         wl1251_tx_complete(wl);
298                 }
299
300                 if (intr & (WL1251_ACX_INTR_EVENT_A |
301                             WL1251_ACX_INTR_EVENT_B)) {
302                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
303                                      intr);
304                         if (intr & WL1251_ACX_INTR_EVENT_A)
305                                 wl1251_event_handle(wl, 0);
306                         else
307                                 wl1251_event_handle(wl, 1);
308                 }
309
310                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
311                         wl1251_debug(DEBUG_IRQ,
312                                      "WL1251_ACX_INTR_INIT_COMPLETE");
313
314                 if (--ctr == 0)
315                         break;
316
317                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
318         } while (intr);
319
320 out_sleep:
321         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
322         wl1251_ps_elp_sleep(wl);
323
324 out:
325         mutex_unlock(&wl->mutex);
326 }
327
328 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
329                        u16 beacon_interval, u8 dtim_period)
330 {
331         int ret;
332
333         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
334                                      DEFAULT_HW_GEN_MODULATION_TYPE,
335                                      wl->tx_mgmt_frm_rate,
336                                      wl->tx_mgmt_frm_mod);
337         if (ret < 0)
338                 goto out;
339
340
341         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
342                               dtim_period);
343         if (ret < 0)
344                 goto out;
345
346         /*
347          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
348          * locking we just sleep instead, for now
349          */
350         msleep(10);
351
352 out:
353         return ret;
354 }
355
356 static void wl1251_filter_work(struct work_struct *work)
357 {
358         struct wl1251 *wl =
359                 container_of(work, struct wl1251, filter_work);
360         int ret;
361
362         mutex_lock(&wl->mutex);
363
364         if (wl->state == WL1251_STATE_OFF)
365                 goto out;
366
367         ret = wl1251_ps_elp_wakeup(wl);
368         if (ret < 0)
369                 goto out;
370
371         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
372                           wl->dtim_period);
373         if (ret < 0)
374                 goto out_sleep;
375
376 out_sleep:
377         wl1251_ps_elp_sleep(wl);
378
379 out:
380         mutex_unlock(&wl->mutex);
381 }
382
383 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
384 {
385         struct wl1251 *wl = hw->priv;
386
387         skb_queue_tail(&wl->tx_queue, skb);
388
389         /*
390          * The chip specific setup must run before the first TX packet -
391          * before that, the tx_work will not be initialized!
392          */
393
394         ieee80211_queue_work(wl->hw, &wl->tx_work);
395
396         /*
397          * The workqueue is slow to process the tx_queue and we need stop
398          * the queue here, otherwise the queue will get too long.
399          */
400         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
401                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
402                 ieee80211_stop_queues(wl->hw);
403
404                 /*
405                  * FIXME: this is racy, the variable is not properly
406                  * protected. Maybe fix this by removing the stupid
407                  * variable altogether and checking the real queue state?
408                  */
409                 wl->tx_queue_stopped = true;
410         }
411
412         return NETDEV_TX_OK;
413 }
414
415 static int wl1251_op_start(struct ieee80211_hw *hw)
416 {
417         struct wl1251 *wl = hw->priv;
418         struct wiphy *wiphy = hw->wiphy;
419         int ret = 0;
420
421         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
422
423         mutex_lock(&wl->mutex);
424
425         if (wl->state != WL1251_STATE_OFF) {
426                 wl1251_error("cannot start because not in off state: %d",
427                              wl->state);
428                 ret = -EBUSY;
429                 goto out;
430         }
431
432         ret = wl1251_chip_wakeup(wl);
433         if (ret < 0)
434                 goto out;
435
436         ret = wl1251_boot(wl);
437         if (ret < 0)
438                 goto out;
439
440         ret = wl1251_hw_init(wl);
441         if (ret < 0)
442                 goto out;
443
444         ret = wl1251_acx_station_id(wl);
445         if (ret < 0)
446                 goto out;
447
448         wl->state = WL1251_STATE_ON;
449
450         wl1251_info("firmware booted (%s)", wl->fw_ver);
451
452         /* update hw/fw version info in wiphy struct */
453         wiphy->hw_version = wl->chip_id;
454         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
455
456 out:
457         if (ret < 0)
458                 wl1251_power_off(wl);
459
460         mutex_unlock(&wl->mutex);
461
462         return ret;
463 }
464
465 static void wl1251_op_stop(struct ieee80211_hw *hw)
466 {
467         struct wl1251 *wl = hw->priv;
468
469         wl1251_info("down");
470
471         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
472
473         mutex_lock(&wl->mutex);
474
475         WARN_ON(wl->state != WL1251_STATE_ON);
476
477         if (wl->scanning) {
478                 mutex_unlock(&wl->mutex);
479                 ieee80211_scan_completed(wl->hw, true);
480                 mutex_lock(&wl->mutex);
481                 wl->scanning = false;
482         }
483
484         wl->state = WL1251_STATE_OFF;
485
486         wl1251_disable_interrupts(wl);
487
488         mutex_unlock(&wl->mutex);
489
490         cancel_work_sync(&wl->irq_work);
491         cancel_work_sync(&wl->tx_work);
492         cancel_work_sync(&wl->filter_work);
493
494         mutex_lock(&wl->mutex);
495
496         /* let's notify MAC80211 about the remaining pending TX frames */
497         wl1251_tx_flush(wl);
498         wl1251_power_off(wl);
499
500         memset(wl->bssid, 0, ETH_ALEN);
501         wl->listen_int = 1;
502         wl->bss_type = MAX_BSS_TYPE;
503
504         wl->data_in_count = 0;
505         wl->rx_counter = 0;
506         wl->rx_handled = 0;
507         wl->rx_current_buffer = 0;
508         wl->rx_last_id = 0;
509         wl->next_tx_complete = 0;
510         wl->elp = false;
511         wl->psm = 0;
512         wl->tx_queue_stopped = false;
513         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
514         wl->channel = WL1251_DEFAULT_CHANNEL;
515
516         wl1251_debugfs_reset(wl);
517
518         mutex_unlock(&wl->mutex);
519 }
520
521 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
522                                    struct ieee80211_vif *vif)
523 {
524         struct wl1251 *wl = hw->priv;
525         int ret = 0;
526
527         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
528                      vif->type, vif->addr);
529
530         mutex_lock(&wl->mutex);
531         if (wl->vif) {
532                 ret = -EBUSY;
533                 goto out;
534         }
535
536         wl->vif = vif;
537
538         switch (vif->type) {
539         case NL80211_IFTYPE_STATION:
540                 wl->bss_type = BSS_TYPE_STA_BSS;
541                 break;
542         case NL80211_IFTYPE_ADHOC:
543                 wl->bss_type = BSS_TYPE_IBSS;
544                 break;
545         default:
546                 ret = -EOPNOTSUPP;
547                 goto out;
548         }
549
550         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
551                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
552                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
553                 ret = wl1251_acx_station_id(wl);
554                 if (ret < 0)
555                         goto out;
556         }
557
558 out:
559         mutex_unlock(&wl->mutex);
560         return ret;
561 }
562
563 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
564                                          struct ieee80211_vif *vif)
565 {
566         struct wl1251 *wl = hw->priv;
567
568         mutex_lock(&wl->mutex);
569         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
570         wl->vif = NULL;
571         mutex_unlock(&wl->mutex);
572 }
573
574 static int wl1251_build_qos_null_data(struct wl1251 *wl)
575 {
576         struct ieee80211_qos_hdr template;
577
578         memset(&template, 0, sizeof(template));
579
580         memcpy(template.addr1, wl->bssid, ETH_ALEN);
581         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
582         memcpy(template.addr3, wl->bssid, ETH_ALEN);
583
584         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
585                                              IEEE80211_STYPE_QOS_NULLFUNC |
586                                              IEEE80211_FCTL_TODS);
587
588         /* FIXME: not sure what priority to use here */
589         template.qos_ctrl = cpu_to_le16(0);
590
591         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
592                                        sizeof(template));
593 }
594
595 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
596 {
597         struct wl1251 *wl = hw->priv;
598         struct ieee80211_conf *conf = &hw->conf;
599         int channel, ret = 0;
600
601         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
602
603         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
604                      channel,
605                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
606                      conf->power_level);
607
608         mutex_lock(&wl->mutex);
609
610         ret = wl1251_ps_elp_wakeup(wl);
611         if (ret < 0)
612                 goto out;
613
614         if (channel != wl->channel) {
615                 wl->channel = channel;
616
617                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
618                                   wl->beacon_int, wl->dtim_period);
619                 if (ret < 0)
620                         goto out_sleep;
621         }
622
623         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
624                 wl1251_debug(DEBUG_PSM, "psm enabled");
625
626                 wl->psm_requested = true;
627
628                 wl->dtim_period = conf->ps_dtim_period;
629
630                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
631                                                   wl->dtim_period);
632
633                 /*
634                  * mac80211 enables PSM only if we're already associated.
635                  */
636                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
637                 if (ret < 0)
638                         goto out_sleep;
639         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
640                    wl->psm_requested) {
641                 wl1251_debug(DEBUG_PSM, "psm disabled");
642
643                 wl->psm_requested = false;
644
645                 if (wl->psm) {
646                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
647                         if (ret < 0)
648                                 goto out_sleep;
649                 }
650         }
651
652         if (conf->power_level != wl->power_level) {
653                 ret = wl1251_acx_tx_power(wl, conf->power_level);
654                 if (ret < 0)
655                         goto out_sleep;
656
657                 wl->power_level = conf->power_level;
658         }
659
660 out_sleep:
661         wl1251_ps_elp_sleep(wl);
662
663 out:
664         mutex_unlock(&wl->mutex);
665
666         return ret;
667 }
668
669 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
670                                   FIF_ALLMULTI | \
671                                   FIF_FCSFAIL | \
672                                   FIF_BCN_PRBRESP_PROMISC | \
673                                   FIF_CONTROL | \
674                                   FIF_OTHER_BSS)
675
676 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
677                                        unsigned int changed,
678                                        unsigned int *total,u64 multicast)
679 {
680         struct wl1251 *wl = hw->priv;
681
682         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
683
684         *total &= WL1251_SUPPORTED_FILTERS;
685         changed &= WL1251_SUPPORTED_FILTERS;
686
687         if (changed == 0)
688                 /* no filters which we support changed */
689                 return;
690
691         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
692
693         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
694         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
695
696         if (*total & FIF_PROMISC_IN_BSS) {
697                 wl->rx_config |= CFG_BSSID_FILTER_EN;
698                 wl->rx_config |= CFG_RX_ALL_GOOD;
699         }
700         if (*total & FIF_ALLMULTI)
701                 /*
702                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
703                  * all multicast frames
704                  */
705                 wl->rx_config &= ~CFG_MC_FILTER_EN;
706         if (*total & FIF_FCSFAIL)
707                 wl->rx_filter |= CFG_RX_FCS_ERROR;
708         if (*total & FIF_BCN_PRBRESP_PROMISC) {
709                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
710                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
711         }
712         if (*total & FIF_CONTROL)
713                 wl->rx_filter |= CFG_RX_CTL_EN;
714         if (*total & FIF_OTHER_BSS)
715                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
716
717         /*
718          * FIXME: workqueues need to be properly cancelled on stop(), for
719          * now let's just disable changing the filter settings. They will
720          * be updated any on config().
721          */
722         /* schedule_work(&wl->filter_work); */
723 }
724
725 /* HW encryption */
726 static int wl1251_set_key_type(struct wl1251 *wl,
727                                struct wl1251_cmd_set_keys *key,
728                                enum set_key_cmd cmd,
729                                struct ieee80211_key_conf *mac80211_key,
730                                const u8 *addr)
731 {
732         switch (mac80211_key->alg) {
733         case ALG_WEP:
734                 if (is_broadcast_ether_addr(addr))
735                         key->key_type = KEY_WEP_DEFAULT;
736                 else
737                         key->key_type = KEY_WEP_ADDR;
738
739                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
740                 break;
741         case ALG_TKIP:
742                 if (is_broadcast_ether_addr(addr))
743                         key->key_type = KEY_TKIP_MIC_GROUP;
744                 else
745                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
746
747                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
748                 break;
749         case ALG_CCMP:
750                 if (is_broadcast_ether_addr(addr))
751                         key->key_type = KEY_AES_GROUP;
752                 else
753                         key->key_type = KEY_AES_PAIRWISE;
754                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
755                 break;
756         default:
757                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
758                 return -EOPNOTSUPP;
759         }
760
761         return 0;
762 }
763
764 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
765                              struct ieee80211_vif *vif,
766                              struct ieee80211_sta *sta,
767                              struct ieee80211_key_conf *key)
768 {
769         struct wl1251 *wl = hw->priv;
770         struct wl1251_cmd_set_keys *wl_cmd;
771         const u8 *addr;
772         int ret;
773
774         static const u8 bcast_addr[ETH_ALEN] =
775                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
776
777         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
778
779         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
780         if (!wl_cmd) {
781                 ret = -ENOMEM;
782                 goto out;
783         }
784
785         addr = sta ? sta->addr : bcast_addr;
786
787         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
788         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
789         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
790                      key->alg, key->keyidx, key->keylen, key->flags);
791         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
792
793         if (is_zero_ether_addr(addr)) {
794                 /* We dont support TX only encryption */
795                 ret = -EOPNOTSUPP;
796                 goto out;
797         }
798
799         mutex_lock(&wl->mutex);
800
801         ret = wl1251_ps_elp_wakeup(wl);
802         if (ret < 0)
803                 goto out_unlock;
804
805         switch (cmd) {
806         case SET_KEY:
807                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
808                 break;
809         case DISABLE_KEY:
810                 wl_cmd->key_action = KEY_REMOVE;
811                 break;
812         default:
813                 wl1251_error("Unsupported key cmd 0x%x", cmd);
814                 break;
815         }
816
817         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
818         if (ret < 0) {
819                 wl1251_error("Set KEY type failed");
820                 goto out_sleep;
821         }
822
823         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
824                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
825
826         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
827             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
828                 /*
829                  * We get the key in the following form:
830                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
831                  * but the target is expecting:
832                  * TKIP - RX MIC - TX MIC
833                  */
834                 memcpy(wl_cmd->key, key->key, 16);
835                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
836                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
837
838         } else {
839                 memcpy(wl_cmd->key, key->key, key->keylen);
840         }
841         wl_cmd->key_size = key->keylen;
842
843         wl_cmd->id = key->keyidx;
844         wl_cmd->ssid_profile = 0;
845
846         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
847
848         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
849         if (ret < 0) {
850                 wl1251_warning("could not set keys");
851                 goto out_sleep;
852         }
853
854 out_sleep:
855         wl1251_ps_elp_sleep(wl);
856
857 out_unlock:
858         mutex_unlock(&wl->mutex);
859
860 out:
861         kfree(wl_cmd);
862
863         return ret;
864 }
865
866 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
867                              struct cfg80211_scan_request *req)
868 {
869         struct wl1251 *wl = hw->priv;
870         struct sk_buff *skb;
871         size_t ssid_len = 0;
872         u8 *ssid = NULL;
873         int ret;
874
875         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
876
877         if (req->n_ssids) {
878                 ssid = req->ssids[0].ssid;
879                 ssid_len = req->ssids[0].ssid_len;
880         }
881
882         mutex_lock(&wl->mutex);
883
884         if (wl->scanning) {
885                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
886                 ret = -EINVAL;
887                 goto out;
888         }
889
890         ret = wl1251_ps_elp_wakeup(wl);
891         if (ret < 0)
892                 goto out;
893
894         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
895                                      req->ie, req->ie_len);
896         if (!skb) {
897                 ret = -ENOMEM;
898                 goto out;
899         }
900
901         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
902                                       skb->len);
903         dev_kfree_skb(skb);
904         if (ret < 0)
905                 goto out_sleep;
906
907         ret = wl1251_cmd_trigger_scan_to(wl, 0);
908         if (ret < 0)
909                 goto out_sleep;
910
911         wl->scanning = true;
912
913         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
914                               req->n_channels, WL1251_SCAN_NUM_PROBES);
915         if (ret < 0) {
916                 wl->scanning = false;
917                 goto out_sleep;
918         }
919
920 out_sleep:
921         wl1251_ps_elp_sleep(wl);
922
923 out:
924         mutex_unlock(&wl->mutex);
925
926         return ret;
927 }
928
929 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
930 {
931         struct wl1251 *wl = hw->priv;
932         int ret;
933
934         mutex_lock(&wl->mutex);
935
936         ret = wl1251_ps_elp_wakeup(wl);
937         if (ret < 0)
938                 goto out;
939
940         ret = wl1251_acx_rts_threshold(wl, (u16) value);
941         if (ret < 0)
942                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
943
944         wl1251_ps_elp_sleep(wl);
945
946 out:
947         mutex_unlock(&wl->mutex);
948
949         return ret;
950 }
951
952 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
953                                        struct ieee80211_vif *vif,
954                                        struct ieee80211_bss_conf *bss_conf,
955                                        u32 changed)
956 {
957         struct wl1251 *wl = hw->priv;
958         struct sk_buff *beacon, *skb;
959         int ret;
960
961         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
962
963         mutex_lock(&wl->mutex);
964
965         ret = wl1251_ps_elp_wakeup(wl);
966         if (ret < 0)
967                 goto out;
968
969         if (changed & BSS_CHANGED_BSSID) {
970                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
971
972                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
973                 if (!skb)
974                         goto out_sleep;
975
976                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
977                                               skb->data, skb->len);
978                 dev_kfree_skb(skb);
979                 if (ret < 0)
980                         goto out_sleep;
981
982                 ret = wl1251_build_qos_null_data(wl);
983                 if (ret < 0)
984                         goto out;
985
986                 if (wl->bss_type != BSS_TYPE_IBSS) {
987                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
988                                           wl->beacon_int, wl->dtim_period);
989                         if (ret < 0)
990                                 goto out_sleep;
991                 }
992         }
993
994         if (changed & BSS_CHANGED_ASSOC) {
995                 if (bss_conf->assoc) {
996                         wl->beacon_int = bss_conf->beacon_int;
997
998                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
999                         if (!skb)
1000                                 goto out_sleep;
1001
1002                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1003                                                       skb->data,
1004                                                       skb->len);
1005                         dev_kfree_skb(skb);
1006                         if (ret < 0)
1007                                 goto out_sleep;
1008
1009                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1010                         if (ret < 0)
1011                                 goto out_sleep;
1012                 } else {
1013                         /* use defaults when not associated */
1014                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1015                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1016                 }
1017         }
1018         if (changed & BSS_CHANGED_ERP_SLOT) {
1019                 if (bss_conf->use_short_slot)
1020                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1021                 else
1022                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1023                 if (ret < 0) {
1024                         wl1251_warning("Set slot time failed %d", ret);
1025                         goto out_sleep;
1026                 }
1027         }
1028
1029         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1030                 if (bss_conf->use_short_preamble)
1031                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1032                 else
1033                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1034         }
1035
1036         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1037                 if (bss_conf->use_cts_prot)
1038                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1039                 else
1040                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1041                 if (ret < 0) {
1042                         wl1251_warning("Set ctsprotect failed %d", ret);
1043                         goto out_sleep;
1044                 }
1045         }
1046
1047         if (changed & BSS_CHANGED_BEACON) {
1048                 beacon = ieee80211_beacon_get(hw, vif);
1049                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1050                                               beacon->len);
1051
1052                 if (ret < 0) {
1053                         dev_kfree_skb(beacon);
1054                         goto out_sleep;
1055                 }
1056
1057                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1058                                               beacon->len);
1059
1060                 dev_kfree_skb(beacon);
1061
1062                 if (ret < 0)
1063                         goto out_sleep;
1064
1065                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1066                                   wl->channel, wl->dtim_period);
1067
1068                 if (ret < 0)
1069                         goto out_sleep;
1070         }
1071
1072 out_sleep:
1073         wl1251_ps_elp_sleep(wl);
1074
1075 out:
1076         mutex_unlock(&wl->mutex);
1077 }
1078
1079
1080 /* can't be const, mac80211 writes to this */
1081 static struct ieee80211_rate wl1251_rates[] = {
1082         { .bitrate = 10,
1083           .hw_value = 0x1,
1084           .hw_value_short = 0x1, },
1085         { .bitrate = 20,
1086           .hw_value = 0x2,
1087           .hw_value_short = 0x2,
1088           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1089         { .bitrate = 55,
1090           .hw_value = 0x4,
1091           .hw_value_short = 0x4,
1092           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1093         { .bitrate = 110,
1094           .hw_value = 0x20,
1095           .hw_value_short = 0x20,
1096           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1097         { .bitrate = 60,
1098           .hw_value = 0x8,
1099           .hw_value_short = 0x8, },
1100         { .bitrate = 90,
1101           .hw_value = 0x10,
1102           .hw_value_short = 0x10, },
1103         { .bitrate = 120,
1104           .hw_value = 0x40,
1105           .hw_value_short = 0x40, },
1106         { .bitrate = 180,
1107           .hw_value = 0x80,
1108           .hw_value_short = 0x80, },
1109         { .bitrate = 240,
1110           .hw_value = 0x200,
1111           .hw_value_short = 0x200, },
1112         { .bitrate = 360,
1113          .hw_value = 0x400,
1114          .hw_value_short = 0x400, },
1115         { .bitrate = 480,
1116           .hw_value = 0x800,
1117           .hw_value_short = 0x800, },
1118         { .bitrate = 540,
1119           .hw_value = 0x1000,
1120           .hw_value_short = 0x1000, },
1121 };
1122
1123 /* can't be const, mac80211 writes to this */
1124 static struct ieee80211_channel wl1251_channels[] = {
1125         { .hw_value = 1, .center_freq = 2412},
1126         { .hw_value = 2, .center_freq = 2417},
1127         { .hw_value = 3, .center_freq = 2422},
1128         { .hw_value = 4, .center_freq = 2427},
1129         { .hw_value = 5, .center_freq = 2432},
1130         { .hw_value = 6, .center_freq = 2437},
1131         { .hw_value = 7, .center_freq = 2442},
1132         { .hw_value = 8, .center_freq = 2447},
1133         { .hw_value = 9, .center_freq = 2452},
1134         { .hw_value = 10, .center_freq = 2457},
1135         { .hw_value = 11, .center_freq = 2462},
1136         { .hw_value = 12, .center_freq = 2467},
1137         { .hw_value = 13, .center_freq = 2472},
1138 };
1139
1140 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1141                              const struct ieee80211_tx_queue_params *params)
1142 {
1143         enum wl1251_acx_ps_scheme ps_scheme;
1144         struct wl1251 *wl = hw->priv;
1145         int ret;
1146
1147         mutex_lock(&wl->mutex);
1148
1149         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1150
1151         ret = wl1251_ps_elp_wakeup(wl);
1152         if (ret < 0)
1153                 goto out;
1154
1155         /* mac80211 uses units of 32 usec */
1156         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1157                                 params->cw_min, params->cw_max,
1158                                 params->aifs, params->txop * 32);
1159         if (ret < 0)
1160                 goto out_sleep;
1161
1162         if (params->uapsd)
1163                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1164         else
1165                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1166
1167         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1168                                  CHANNEL_TYPE_EDCF,
1169                                  wl1251_tx_get_queue(queue), ps_scheme,
1170                                  WL1251_ACX_ACK_POLICY_LEGACY);
1171         if (ret < 0)
1172                 goto out_sleep;
1173
1174 out_sleep:
1175         wl1251_ps_elp_sleep(wl);
1176
1177 out:
1178         mutex_unlock(&wl->mutex);
1179
1180         return ret;
1181 }
1182
1183 /* can't be const, mac80211 writes to this */
1184 static struct ieee80211_supported_band wl1251_band_2ghz = {
1185         .channels = wl1251_channels,
1186         .n_channels = ARRAY_SIZE(wl1251_channels),
1187         .bitrates = wl1251_rates,
1188         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1189 };
1190
1191 static const struct ieee80211_ops wl1251_ops = {
1192         .start = wl1251_op_start,
1193         .stop = wl1251_op_stop,
1194         .add_interface = wl1251_op_add_interface,
1195         .remove_interface = wl1251_op_remove_interface,
1196         .config = wl1251_op_config,
1197         .configure_filter = wl1251_op_configure_filter,
1198         .tx = wl1251_op_tx,
1199         .set_key = wl1251_op_set_key,
1200         .hw_scan = wl1251_op_hw_scan,
1201         .bss_info_changed = wl1251_op_bss_info_changed,
1202         .set_rts_threshold = wl1251_op_set_rts_threshold,
1203         .conf_tx = wl1251_op_conf_tx,
1204 };
1205
1206 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1207 {
1208         unsigned long timeout;
1209
1210         wl1251_reg_write32(wl, EE_ADDR, offset);
1211         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1212
1213         /* EE_CTL_READ clears when data is ready */
1214         timeout = jiffies + msecs_to_jiffies(100);
1215         while (1) {
1216                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1217                         break;
1218
1219                 if (time_after(jiffies, timeout))
1220                         return -ETIMEDOUT;
1221
1222                 msleep(1);
1223         }
1224
1225         *data = wl1251_reg_read32(wl, EE_DATA);
1226         return 0;
1227 }
1228
1229 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1230                               u8 *data, size_t len)
1231 {
1232         size_t i;
1233         int ret;
1234
1235         wl1251_reg_write32(wl, EE_START, 0);
1236
1237         for (i = 0; i < len; i++) {
1238                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1239                 if (ret < 0)
1240                         return ret;
1241         }
1242
1243         return 0;
1244 }
1245
1246 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1247 {
1248         u8 mac[ETH_ALEN];
1249         int i, ret;
1250
1251         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1252
1253         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1254         if (ret < 0) {
1255                 wl1251_warning("failed to read MAC address from EEPROM");
1256                 return ret;
1257         }
1258
1259         /* MAC is stored in reverse order */
1260         for (i = 0; i < ETH_ALEN; i++)
1261                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1262
1263         return 0;
1264 }
1265
1266 static int wl1251_register_hw(struct wl1251 *wl)
1267 {
1268         int ret;
1269
1270         if (wl->mac80211_registered)
1271                 return 0;
1272
1273         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1274
1275         ret = ieee80211_register_hw(wl->hw);
1276         if (ret < 0) {
1277                 wl1251_error("unable to register mac80211 hw: %d", ret);
1278                 return ret;
1279         }
1280
1281         wl->mac80211_registered = true;
1282
1283         wl1251_notice("loaded");
1284
1285         return 0;
1286 }
1287
1288 int wl1251_init_ieee80211(struct wl1251 *wl)
1289 {
1290         int ret;
1291
1292         /* The tx descriptor buffer and the TKIP space */
1293         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1294                 + WL1251_TKIP_IV_SPACE;
1295
1296         /* unit us */
1297         /* FIXME: find a proper value */
1298         wl->hw->channel_change_time = 10000;
1299
1300         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1301                 IEEE80211_HW_NOISE_DBM |
1302                 IEEE80211_HW_SUPPORTS_PS |
1303                 IEEE80211_HW_BEACON_FILTER |
1304                 IEEE80211_HW_SUPPORTS_UAPSD;
1305
1306         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1307         wl->hw->wiphy->max_scan_ssids = 1;
1308         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1309
1310         wl->hw->queues = 4;
1311
1312         if (wl->use_eeprom)
1313                 wl1251_read_eeprom_mac(wl);
1314
1315         ret = wl1251_register_hw(wl);
1316         if (ret)
1317                 goto out;
1318
1319         wl1251_debugfs_init(wl);
1320         wl1251_notice("initialized");
1321
1322         ret = 0;
1323
1324 out:
1325         return ret;
1326 }
1327 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1328
1329 struct ieee80211_hw *wl1251_alloc_hw(void)
1330 {
1331         struct ieee80211_hw *hw;
1332         struct wl1251 *wl;
1333         int i;
1334         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1335
1336         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1337         if (!hw) {
1338                 wl1251_error("could not alloc ieee80211_hw");
1339                 return ERR_PTR(-ENOMEM);
1340         }
1341
1342         wl = hw->priv;
1343         memset(wl, 0, sizeof(*wl));
1344
1345         wl->hw = hw;
1346
1347         wl->data_in_count = 0;
1348
1349         skb_queue_head_init(&wl->tx_queue);
1350
1351         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1352         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1353         wl->channel = WL1251_DEFAULT_CHANNEL;
1354         wl->scanning = false;
1355         wl->default_key = 0;
1356         wl->listen_int = 1;
1357         wl->rx_counter = 0;
1358         wl->rx_handled = 0;
1359         wl->rx_current_buffer = 0;
1360         wl->rx_last_id = 0;
1361         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1362         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1363         wl->elp = false;
1364         wl->psm = 0;
1365         wl->psm_requested = false;
1366         wl->tx_queue_stopped = false;
1367         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1368         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1369         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1370         wl->vif = NULL;
1371
1372         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1373                 wl->tx_frames[i] = NULL;
1374
1375         wl->next_tx_complete = 0;
1376
1377         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1378         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1379
1380         /*
1381          * In case our MAC address is not correctly set,
1382          * we use a random but Nokia MAC.
1383          */
1384         memcpy(wl->mac_addr, nokia_oui, 3);
1385         get_random_bytes(wl->mac_addr + 3, 3);
1386
1387         wl->state = WL1251_STATE_OFF;
1388         mutex_init(&wl->mutex);
1389
1390         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1391         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1392
1393         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1394         if (!wl->rx_descriptor) {
1395                 wl1251_error("could not allocate memory for rx descriptor");
1396                 ieee80211_free_hw(hw);
1397                 return ERR_PTR(-ENOMEM);
1398         }
1399
1400         return hw;
1401 }
1402 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1403
1404 int wl1251_free_hw(struct wl1251 *wl)
1405 {
1406         ieee80211_unregister_hw(wl->hw);
1407
1408         wl1251_debugfs_exit(wl);
1409
1410         kfree(wl->target_mem_map);
1411         kfree(wl->data_path);
1412         vfree(wl->fw);
1413         wl->fw = NULL;
1414         kfree(wl->nvs);
1415         wl->nvs = NULL;
1416
1417         kfree(wl->rx_descriptor);
1418         wl->rx_descriptor = NULL;
1419
1420         ieee80211_free_hw(wl->hw);
1421
1422         return 0;
1423 }
1424 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1425
1426 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1427 MODULE_LICENSE("GPL");
1428 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1429 MODULE_FIRMWARE(WL1251_FW_NAME);