wl1251: initialise default channel to zero
[linux-2.6.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 #include <linux/crc32.h>
30 #include <linux/etherdevice.h>
31
32 #include "wl1251.h"
33 #include "wl12xx_80211.h"
34 #include "reg.h"
35 #include "wl1251_io.h"
36 #include "wl1251_cmd.h"
37 #include "wl1251_event.h"
38 #include "wl1251_tx.h"
39 #include "wl1251_rx.h"
40 #include "wl1251_ps.h"
41 #include "wl1251_init.h"
42 #include "wl1251_debugfs.h"
43 #include "wl1251_boot.h"
44
45 void wl1251_enable_interrupts(struct wl1251 *wl)
46 {
47         wl->if_ops->enable_irq(wl);
48 }
49
50 void wl1251_disable_interrupts(struct wl1251 *wl)
51 {
52         wl->if_ops->disable_irq(wl);
53 }
54
55 static void wl1251_power_off(struct wl1251 *wl)
56 {
57         wl->set_power(false);
58 }
59
60 static void wl1251_power_on(struct wl1251 *wl)
61 {
62         wl->set_power(true);
63 }
64
65 static int wl1251_fetch_firmware(struct wl1251 *wl)
66 {
67         const struct firmware *fw;
68         struct device *dev = wiphy_dev(wl->hw->wiphy);
69         int ret;
70
71         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
72
73         if (ret < 0) {
74                 wl1251_error("could not get firmware: %d", ret);
75                 return ret;
76         }
77
78         if (fw->size % 4) {
79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
80                              fw->size);
81                 ret = -EILSEQ;
82                 goto out;
83         }
84
85         wl->fw_len = fw->size;
86         wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
87
88         if (!wl->fw) {
89                 wl1251_error("could not allocate memory for the firmware");
90                 ret = -ENOMEM;
91                 goto out;
92         }
93
94         memcpy(wl->fw, fw->data, wl->fw_len);
95
96         ret = 0;
97
98 out:
99         release_firmware(fw);
100
101         return ret;
102 }
103
104 static int wl1251_fetch_nvs(struct wl1251 *wl)
105 {
106         const struct firmware *fw;
107         struct device *dev = wiphy_dev(wl->hw->wiphy);
108         int ret;
109
110         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
111
112         if (ret < 0) {
113                 wl1251_error("could not get nvs file: %d", ret);
114                 return ret;
115         }
116
117         if (fw->size % 4) {
118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
119                              fw->size);
120                 ret = -EILSEQ;
121                 goto out;
122         }
123
124         wl->nvs_len = fw->size;
125         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
126
127         if (!wl->nvs) {
128                 wl1251_error("could not allocate memory for the nvs file");
129                 ret = -ENOMEM;
130                 goto out;
131         }
132
133         memcpy(wl->nvs, fw->data, wl->nvs_len);
134
135         ret = 0;
136
137 out:
138         release_firmware(fw);
139
140         return ret;
141 }
142
143 static void wl1251_fw_wakeup(struct wl1251 *wl)
144 {
145         u32 elp_reg;
146
147         elp_reg = ELPCTRL_WAKE_UP;
148         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
149         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
150
151         if (!(elp_reg & ELPCTRL_WLAN_READY))
152                 wl1251_warning("WLAN not ready");
153 }
154
155 static int wl1251_chip_wakeup(struct wl1251 *wl)
156 {
157         int ret = 0;
158
159         wl1251_power_on(wl);
160         msleep(WL1251_POWER_ON_SLEEP);
161         wl->if_ops->reset(wl);
162
163         /* We don't need a real memory partition here, because we only want
164          * to use the registers at this point. */
165         wl1251_set_partition(wl,
166                              0x00000000,
167                              0x00000000,
168                              REGISTERS_BASE,
169                              REGISTERS_DOWN_SIZE);
170
171         /* ELP module wake up */
172         wl1251_fw_wakeup(wl);
173
174         /* whal_FwCtrl_BootSm() */
175
176         /* 0. read chip id from CHIP_ID */
177         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
178
179         /* 1. check if chip id is valid */
180
181         switch (wl->chip_id) {
182         case CHIP_ID_1251_PG12:
183                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
184                              wl->chip_id);
185                 break;
186         case CHIP_ID_1251_PG10:
187         case CHIP_ID_1251_PG11:
188         default:
189                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
190                 ret = -ENODEV;
191                 goto out;
192         }
193
194         if (wl->fw == NULL) {
195                 ret = wl1251_fetch_firmware(wl);
196                 if (ret < 0)
197                         goto out;
198         }
199
200         /* No NVS from netlink, try to get it from the filesystem */
201         if (wl->nvs == NULL) {
202                 ret = wl1251_fetch_nvs(wl);
203                 if (ret < 0)
204                         goto out;
205         }
206
207 out:
208         return ret;
209 }
210
211 static void wl1251_irq_work(struct work_struct *work)
212 {
213         u32 intr;
214         struct wl1251 *wl =
215                 container_of(work, struct wl1251, irq_work);
216         int ret;
217
218         mutex_lock(&wl->mutex);
219
220         wl1251_debug(DEBUG_IRQ, "IRQ work");
221
222         if (wl->state == WL1251_STATE_OFF)
223                 goto out;
224
225         ret = wl1251_ps_elp_wakeup(wl);
226         if (ret < 0)
227                 goto out;
228
229         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
230
231         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
232         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
233
234         if (wl->data_path) {
235                 wl->rx_counter =
236                         wl1251_mem_read32(wl, wl->data_path->rx_control_addr);
237
238                 /* We handle a frmware bug here */
239                 switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
240                 case 0:
241                         wl1251_debug(DEBUG_IRQ, "RX: FW and host in sync");
242                         intr &= ~WL1251_ACX_INTR_RX0_DATA;
243                         intr &= ~WL1251_ACX_INTR_RX1_DATA;
244                         break;
245                 case 1:
246                         wl1251_debug(DEBUG_IRQ, "RX: FW +1");
247                         intr |= WL1251_ACX_INTR_RX0_DATA;
248                         intr &= ~WL1251_ACX_INTR_RX1_DATA;
249                         break;
250                 case 2:
251                         wl1251_debug(DEBUG_IRQ, "RX: FW +2");
252                         intr |= WL1251_ACX_INTR_RX0_DATA;
253                         intr |= WL1251_ACX_INTR_RX1_DATA;
254                         break;
255                 default:
256                         wl1251_warning("RX: FW and host out of sync: %d",
257                                        wl->rx_counter - wl->rx_handled);
258                         break;
259                 }
260
261                 wl->rx_handled = wl->rx_counter;
262
263
264                 wl1251_debug(DEBUG_IRQ, "RX counter: %d", wl->rx_counter);
265         }
266
267         intr &= wl->intr_mask;
268
269         if (intr == 0) {
270                 wl1251_debug(DEBUG_IRQ, "INTR is 0");
271                 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
272                                    ~(wl->intr_mask));
273
274                 goto out_sleep;
275         }
276
277         if (intr & WL1251_ACX_INTR_RX0_DATA) {
278                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
279                 wl1251_rx(wl);
280         }
281
282         if (intr & WL1251_ACX_INTR_RX1_DATA) {
283                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
284                 wl1251_rx(wl);
285         }
286
287         if (intr & WL1251_ACX_INTR_TX_RESULT) {
288                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
289                 wl1251_tx_complete(wl);
290         }
291
292         if (intr & (WL1251_ACX_INTR_EVENT_A | WL1251_ACX_INTR_EVENT_B)) {
293                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)", intr);
294                 if (intr & WL1251_ACX_INTR_EVENT_A)
295                         wl1251_event_handle(wl, 0);
296                 else
297                         wl1251_event_handle(wl, 1);
298         }
299
300         if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
301                 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_INIT_COMPLETE");
302
303         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
304
305 out_sleep:
306         wl1251_ps_elp_sleep(wl);
307
308 out:
309         mutex_unlock(&wl->mutex);
310 }
311
312 static void wl1251_filter_work(struct work_struct *work)
313 {
314         struct wl1251 *wl =
315                 container_of(work, struct wl1251, filter_work);
316         int ret;
317
318         mutex_lock(&wl->mutex);
319
320         if (wl->state == WL1251_STATE_OFF)
321                 goto out;
322
323         ret = wl1251_ps_elp_wakeup(wl);
324         if (ret < 0)
325                 goto out;
326
327         ret = wl1251_cmd_join(wl, wl->bss_type, wl->beacon_int,
328                                    wl->dtim_period);
329         if (ret < 0)
330                 goto out_sleep;
331
332 out_sleep:
333         wl1251_ps_elp_sleep(wl);
334
335 out:
336         mutex_unlock(&wl->mutex);
337 }
338
339 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
340 {
341         struct wl1251 *wl = hw->priv;
342
343         skb_queue_tail(&wl->tx_queue, skb);
344
345         /*
346          * The chip specific setup must run before the first TX packet -
347          * before that, the tx_work will not be initialized!
348          */
349
350         schedule_work(&wl->tx_work);
351
352         /*
353          * The workqueue is slow to process the tx_queue and we need stop
354          * the queue here, otherwise the queue will get too long.
355          */
356         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
357                 ieee80211_stop_queues(wl->hw);
358
359                 /*
360                  * FIXME: this is racy, the variable is not properly
361                  * protected. Maybe fix this by removing the stupid
362                  * variable altogether and checking the real queue state?
363                  */
364                 wl->tx_queue_stopped = true;
365         }
366
367         return NETDEV_TX_OK;
368 }
369
370 static int wl1251_op_start(struct ieee80211_hw *hw)
371 {
372         struct wl1251 *wl = hw->priv;
373         int ret = 0;
374
375         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
376
377         mutex_lock(&wl->mutex);
378
379         if (wl->state != WL1251_STATE_OFF) {
380                 wl1251_error("cannot start because not in off state: %d",
381                              wl->state);
382                 ret = -EBUSY;
383                 goto out;
384         }
385
386         ret = wl1251_chip_wakeup(wl);
387         if (ret < 0)
388                 goto out;
389
390         ret = wl1251_boot(wl);
391         if (ret < 0)
392                 goto out;
393
394         ret = wl1251_hw_init(wl);
395         if (ret < 0)
396                 goto out;
397
398         ret = wl1251_acx_station_id(wl);
399         if (ret < 0)
400                 goto out;
401
402         wl->state = WL1251_STATE_ON;
403
404         wl1251_info("firmware booted (%s)", wl->fw_ver);
405
406 out:
407         if (ret < 0)
408                 wl1251_power_off(wl);
409
410         mutex_unlock(&wl->mutex);
411
412         return ret;
413 }
414
415 static void wl1251_op_stop(struct ieee80211_hw *hw)
416 {
417         struct wl1251 *wl = hw->priv;
418
419         wl1251_info("down");
420
421         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
422
423         mutex_lock(&wl->mutex);
424
425         WARN_ON(wl->state != WL1251_STATE_ON);
426
427         if (wl->scanning) {
428                 mutex_unlock(&wl->mutex);
429                 ieee80211_scan_completed(wl->hw, true);
430                 mutex_lock(&wl->mutex);
431                 wl->scanning = false;
432         }
433
434         wl->state = WL1251_STATE_OFF;
435
436         wl1251_disable_interrupts(wl);
437
438         mutex_unlock(&wl->mutex);
439
440         cancel_work_sync(&wl->irq_work);
441         cancel_work_sync(&wl->tx_work);
442         cancel_work_sync(&wl->filter_work);
443
444         mutex_lock(&wl->mutex);
445
446         /* let's notify MAC80211 about the remaining pending TX frames */
447         wl1251_tx_flush(wl);
448         wl1251_power_off(wl);
449
450         memset(wl->bssid, 0, ETH_ALEN);
451         wl->listen_int = 1;
452         wl->bss_type = MAX_BSS_TYPE;
453
454         wl->data_in_count = 0;
455         wl->rx_counter = 0;
456         wl->rx_handled = 0;
457         wl->rx_current_buffer = 0;
458         wl->rx_last_id = 0;
459         wl->next_tx_complete = 0;
460         wl->elp = false;
461         wl->psm = 0;
462         wl->tx_queue_stopped = false;
463         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
464         wl->channel = WL1251_DEFAULT_CHANNEL;
465
466         wl1251_debugfs_reset(wl);
467
468         mutex_unlock(&wl->mutex);
469 }
470
471 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
472                                    struct ieee80211_if_init_conf *conf)
473 {
474         struct wl1251 *wl = hw->priv;
475         int ret = 0;
476
477         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
478                      conf->type, conf->mac_addr);
479
480         mutex_lock(&wl->mutex);
481
482         switch (conf->type) {
483         case NL80211_IFTYPE_STATION:
484                 wl->bss_type = BSS_TYPE_STA_BSS;
485                 break;
486         case NL80211_IFTYPE_ADHOC:
487                 wl->bss_type = BSS_TYPE_IBSS;
488                 break;
489         default:
490                 ret = -EOPNOTSUPP;
491                 goto out;
492         }
493
494         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
495                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
496                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
497                 ret = wl1251_acx_station_id(wl);
498                 if (ret < 0)
499                         goto out;
500         }
501
502 out:
503         mutex_unlock(&wl->mutex);
504         return ret;
505 }
506
507 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
508                                          struct ieee80211_if_init_conf *conf)
509 {
510         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
511 }
512
513 static int wl1251_build_null_data(struct wl1251 *wl)
514 {
515         struct wl12xx_null_data_template template;
516
517         if (!is_zero_ether_addr(wl->bssid)) {
518                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
519                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
520         } else {
521                 memset(template.header.da, 0xff, ETH_ALEN);
522                 memset(template.header.bssid, 0xff, ETH_ALEN);
523         }
524
525         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
526         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
527                                                 IEEE80211_STYPE_NULLFUNC);
528
529         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
530                                        sizeof(template));
531
532 }
533
534 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
535 {
536         struct wl12xx_ps_poll_template template;
537
538         memcpy(template.bssid, wl->bssid, ETH_ALEN);
539         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
540         template.aid = aid;
541         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
542
543         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
544                                        sizeof(template));
545
546 }
547
548 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
549 {
550         struct wl1251 *wl = hw->priv;
551         struct ieee80211_conf *conf = &hw->conf;
552         int channel, ret = 0;
553
554         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
555
556         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
557                      channel,
558                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
559                      conf->power_level);
560
561         mutex_lock(&wl->mutex);
562
563         ret = wl1251_ps_elp_wakeup(wl);
564         if (ret < 0)
565                 goto out;
566
567         if (channel != wl->channel) {
568                 ret = wl1251_cmd_join(wl, wl->bss_type, wl->beacon_int,
569                                            wl->dtim_period);
570                 if (ret < 0)
571                         goto out_sleep;
572
573                 wl->channel = channel;
574         }
575
576         ret = wl1251_build_null_data(wl);
577         if (ret < 0)
578                 goto out_sleep;
579
580         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
581                 wl1251_debug(DEBUG_PSM, "psm enabled");
582
583                 wl->psm_requested = true;
584
585                 /*
586                  * We enter PSM only if we're already associated.
587                  * If we're not, we'll enter it when joining an SSID,
588                  * through the bss_info_changed() hook.
589                  */
590                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
591         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
592                    wl->psm_requested) {
593                 wl1251_debug(DEBUG_PSM, "psm disabled");
594
595                 wl->psm_requested = false;
596
597                 if (wl->psm)
598                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
599         }
600
601         if (conf->power_level != wl->power_level) {
602                 ret = wl1251_acx_tx_power(wl, conf->power_level);
603                 if (ret < 0)
604                         goto out;
605
606                 wl->power_level = conf->power_level;
607         }
608
609 out_sleep:
610         wl1251_ps_elp_sleep(wl);
611
612 out:
613         mutex_unlock(&wl->mutex);
614
615         return ret;
616 }
617
618 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
619                                   FIF_ALLMULTI | \
620                                   FIF_FCSFAIL | \
621                                   FIF_BCN_PRBRESP_PROMISC | \
622                                   FIF_CONTROL | \
623                                   FIF_OTHER_BSS)
624
625 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
626                                        unsigned int changed,
627                                        unsigned int *total,
628                                        int mc_count,
629                                        struct dev_addr_list *mc_list)
630 {
631         struct wl1251 *wl = hw->priv;
632
633         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
634
635         *total &= WL1251_SUPPORTED_FILTERS;
636         changed &= WL1251_SUPPORTED_FILTERS;
637
638         if (changed == 0)
639                 /* no filters which we support changed */
640                 return;
641
642         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
643
644         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
645         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
646
647         if (*total & FIF_PROMISC_IN_BSS) {
648                 wl->rx_config |= CFG_BSSID_FILTER_EN;
649                 wl->rx_config |= CFG_RX_ALL_GOOD;
650         }
651         if (*total & FIF_ALLMULTI)
652                 /*
653                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
654                  * all multicast frames
655                  */
656                 wl->rx_config &= ~CFG_MC_FILTER_EN;
657         if (*total & FIF_FCSFAIL)
658                 wl->rx_filter |= CFG_RX_FCS_ERROR;
659         if (*total & FIF_BCN_PRBRESP_PROMISC) {
660                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
661                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
662         }
663         if (*total & FIF_CONTROL)
664                 wl->rx_filter |= CFG_RX_CTL_EN;
665         if (*total & FIF_OTHER_BSS)
666                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
667
668         /*
669          * FIXME: workqueues need to be properly cancelled on stop(), for
670          * now let's just disable changing the filter settings. They will
671          * be updated any on config().
672          */
673         /* schedule_work(&wl->filter_work); */
674 }
675
676 /* HW encryption */
677 static int wl1251_set_key_type(struct wl1251 *wl,
678                                struct wl1251_cmd_set_keys *key,
679                                enum set_key_cmd cmd,
680                                struct ieee80211_key_conf *mac80211_key,
681                                const u8 *addr)
682 {
683         switch (mac80211_key->alg) {
684         case ALG_WEP:
685                 if (is_broadcast_ether_addr(addr))
686                         key->key_type = KEY_WEP_DEFAULT;
687                 else
688                         key->key_type = KEY_WEP_ADDR;
689
690                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
691                 break;
692         case ALG_TKIP:
693                 if (is_broadcast_ether_addr(addr))
694                         key->key_type = KEY_TKIP_MIC_GROUP;
695                 else
696                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
697
698                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
699                 break;
700         case ALG_CCMP:
701                 if (is_broadcast_ether_addr(addr))
702                         key->key_type = KEY_AES_GROUP;
703                 else
704                         key->key_type = KEY_AES_PAIRWISE;
705                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
706                 break;
707         default:
708                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
709                 return -EOPNOTSUPP;
710         }
711
712         return 0;
713 }
714
715 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
716                              struct ieee80211_vif *vif,
717                              struct ieee80211_sta *sta,
718                              struct ieee80211_key_conf *key)
719 {
720         struct wl1251 *wl = hw->priv;
721         struct wl1251_cmd_set_keys *wl_cmd;
722         const u8 *addr;
723         int ret;
724
725         static const u8 bcast_addr[ETH_ALEN] =
726                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
727
728         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
729
730         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
731         if (!wl_cmd) {
732                 ret = -ENOMEM;
733                 goto out;
734         }
735
736         addr = sta ? sta->addr : bcast_addr;
737
738         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
739         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
740         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
741                      key->alg, key->keyidx, key->keylen, key->flags);
742         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
743
744         if (is_zero_ether_addr(addr)) {
745                 /* We dont support TX only encryption */
746                 ret = -EOPNOTSUPP;
747                 goto out;
748         }
749
750         mutex_lock(&wl->mutex);
751
752         ret = wl1251_ps_elp_wakeup(wl);
753         if (ret < 0)
754                 goto out_unlock;
755
756         switch (cmd) {
757         case SET_KEY:
758                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
759                 break;
760         case DISABLE_KEY:
761                 wl_cmd->key_action = KEY_REMOVE;
762                 break;
763         default:
764                 wl1251_error("Unsupported key cmd 0x%x", cmd);
765                 break;
766         }
767
768         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
769         if (ret < 0) {
770                 wl1251_error("Set KEY type failed");
771                 goto out_sleep;
772         }
773
774         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
775                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
776
777         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
778             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
779                 /*
780                  * We get the key in the following form:
781                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
782                  * but the target is expecting:
783                  * TKIP - RX MIC - TX MIC
784                  */
785                 memcpy(wl_cmd->key, key->key, 16);
786                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
787                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
788
789         } else {
790                 memcpy(wl_cmd->key, key->key, key->keylen);
791         }
792         wl_cmd->key_size = key->keylen;
793
794         wl_cmd->id = key->keyidx;
795         wl_cmd->ssid_profile = 0;
796
797         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
798
799         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
800         if (ret < 0) {
801                 wl1251_warning("could not set keys");
802                 goto out_sleep;
803         }
804
805 out_sleep:
806         wl1251_ps_elp_sleep(wl);
807
808 out_unlock:
809         mutex_unlock(&wl->mutex);
810
811 out:
812         kfree(wl_cmd);
813
814         return ret;
815 }
816
817 static int wl1251_build_basic_rates(char *rates)
818 {
819         u8 index = 0;
820
821         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
822         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
823         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
824         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
825
826         return index;
827 }
828
829 static int wl1251_build_extended_rates(char *rates)
830 {
831         u8 index = 0;
832
833         rates[index++] = IEEE80211_OFDM_RATE_6MB;
834         rates[index++] = IEEE80211_OFDM_RATE_9MB;
835         rates[index++] = IEEE80211_OFDM_RATE_12MB;
836         rates[index++] = IEEE80211_OFDM_RATE_18MB;
837         rates[index++] = IEEE80211_OFDM_RATE_24MB;
838         rates[index++] = IEEE80211_OFDM_RATE_36MB;
839         rates[index++] = IEEE80211_OFDM_RATE_48MB;
840         rates[index++] = IEEE80211_OFDM_RATE_54MB;
841
842         return index;
843 }
844
845
846 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
847 {
848         struct wl12xx_probe_req_template template;
849         struct wl12xx_ie_rates *rates;
850         char *ptr;
851         u16 size;
852
853         ptr = (char *)&template;
854         size = sizeof(struct ieee80211_header);
855
856         memset(template.header.da, 0xff, ETH_ALEN);
857         memset(template.header.bssid, 0xff, ETH_ALEN);
858         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
859         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
860
861         /* IEs */
862         /* SSID */
863         template.ssid.header.id = WLAN_EID_SSID;
864         template.ssid.header.len = ssid_len;
865         if (ssid_len && ssid)
866                 memcpy(template.ssid.ssid, ssid, ssid_len);
867         size += sizeof(struct wl12xx_ie_header) + ssid_len;
868         ptr += size;
869
870         /* Basic Rates */
871         rates = (struct wl12xx_ie_rates *)ptr;
872         rates->header.id = WLAN_EID_SUPP_RATES;
873         rates->header.len = wl1251_build_basic_rates(rates->rates);
874         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
875         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
876
877         /* Extended rates */
878         rates = (struct wl12xx_ie_rates *)ptr;
879         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
880         rates->header.len = wl1251_build_extended_rates(rates->rates);
881         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
882
883         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
884
885         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
886                                       size);
887 }
888
889 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
890                           u8 active_scan, u8 high_prio, u8 num_channels,
891                           u8 probe_requests)
892 {
893         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
894         struct cmd_scan *params = NULL;
895         int i, ret;
896         u16 scan_options = 0;
897
898         if (wl->scanning)
899                 return -EINVAL;
900
901         params = kzalloc(sizeof(*params), GFP_KERNEL);
902         if (!params)
903                 return -ENOMEM;
904
905         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
906         params->params.rx_filter_options =
907                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
908
909         /* High priority scan */
910         if (!active_scan)
911                 scan_options |= SCAN_PASSIVE;
912         if (high_prio)
913                 scan_options |= SCAN_PRIORITY_HIGH;
914         params->params.scan_options = scan_options;
915
916         params->params.num_channels = num_channels;
917         params->params.num_probe_requests = probe_requests;
918         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
919         params->params.tid_trigger = 0;
920
921         for (i = 0; i < num_channels; i++) {
922                 params->channels[i].min_duration = cpu_to_le32(30000);
923                 params->channels[i].max_duration = cpu_to_le32(60000);
924                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
925                 memset(&params->channels[i].bssid_msb, 0xff, 2);
926                 params->channels[i].early_termination = 0;
927                 params->channels[i].tx_power_att = 0;
928                 params->channels[i].channel = i + 1;
929                 memset(params->channels[i].pad, 0, 3);
930         }
931
932         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
933                 memset(&params->channels[i], 0,
934                        sizeof(struct basic_scan_channel_parameters));
935
936         if (len && ssid) {
937                 params->params.ssid_len = len;
938                 memcpy(params->params.ssid, ssid, len);
939         } else {
940                 params->params.ssid_len = 0;
941                 memset(params->params.ssid, 0, 32);
942         }
943
944         ret = wl1251_build_probe_req(wl, ssid, len);
945         if (ret < 0) {
946                 wl1251_error("PROBE request template failed");
947                 goto out;
948         }
949
950         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
951         if (!trigger)
952                 goto out;
953
954         trigger->timeout = 0;
955
956         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
957                               sizeof(*trigger));
958         if (ret < 0) {
959                 wl1251_error("trigger scan to failed for hw scan");
960                 goto out;
961         }
962
963         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
964
965         wl->scanning = true;
966
967         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
968         if (ret < 0)
969                 wl1251_error("SCAN failed");
970
971         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
972
973         if (params->header.status != CMD_STATUS_SUCCESS) {
974                 wl1251_error("TEST command answer error: %d",
975                              params->header.status);
976                 wl->scanning = false;
977                 ret = -EIO;
978                 goto out;
979         }
980
981 out:
982         kfree(params);
983         return ret;
984
985 }
986
987 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
988                              struct cfg80211_scan_request *req)
989 {
990         struct wl1251 *wl = hw->priv;
991         int ret;
992         u8 *ssid = NULL;
993         size_t ssid_len = 0;
994
995         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
996
997         if (req->n_ssids) {
998                 ssid = req->ssids[0].ssid;
999                 ssid_len = req->ssids[0].ssid_len;
1000         }
1001
1002         mutex_lock(&wl->mutex);
1003
1004         ret = wl1251_ps_elp_wakeup(wl);
1005         if (ret < 0)
1006                 goto out;
1007
1008         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1009
1010         wl1251_ps_elp_sleep(wl);
1011
1012 out:
1013         mutex_unlock(&wl->mutex);
1014
1015         return ret;
1016 }
1017
1018 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1019 {
1020         struct wl1251 *wl = hw->priv;
1021         int ret;
1022
1023         mutex_lock(&wl->mutex);
1024
1025         ret = wl1251_ps_elp_wakeup(wl);
1026         if (ret < 0)
1027                 goto out;
1028
1029         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1030         if (ret < 0)
1031                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1032
1033         wl1251_ps_elp_sleep(wl);
1034
1035 out:
1036         mutex_unlock(&wl->mutex);
1037
1038         return ret;
1039 }
1040
1041 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1042                                        struct ieee80211_vif *vif,
1043                                        struct ieee80211_bss_conf *bss_conf,
1044                                        u32 changed)
1045 {
1046         enum wl1251_cmd_ps_mode mode;
1047         struct wl1251 *wl = hw->priv;
1048         struct sk_buff *beacon;
1049         int ret;
1050
1051         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1052
1053         mutex_lock(&wl->mutex);
1054
1055         ret = wl1251_ps_elp_wakeup(wl);
1056         if (ret < 0)
1057                 goto out;
1058
1059         if (changed & BSS_CHANGED_ASSOC) {
1060                 if (bss_conf->assoc) {
1061                         wl->beacon_int = bss_conf->beacon_int;
1062                         wl->dtim_period = bss_conf->dtim_period;
1063
1064                         /* FIXME: call join */
1065
1066                         wl->aid = bss_conf->aid;
1067
1068                         ret = wl1251_build_ps_poll(wl, wl->aid);
1069                         if (ret < 0)
1070                                 goto out_sleep;
1071
1072                         ret = wl1251_acx_aid(wl, wl->aid);
1073                         if (ret < 0)
1074                                 goto out_sleep;
1075
1076                         /* If we want to go in PSM but we're not there yet */
1077                         if (wl->psm_requested && !wl->psm) {
1078                                 mode = STATION_POWER_SAVE_MODE;
1079                                 ret = wl1251_ps_set_mode(wl, mode);
1080                                 if (ret < 0)
1081                                         goto out_sleep;
1082                         }
1083                 } else {
1084                         /* use defaults when not associated */
1085                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1086                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1087                 }
1088         }
1089         if (changed & BSS_CHANGED_ERP_SLOT) {
1090                 if (bss_conf->use_short_slot)
1091                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1092                 else
1093                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1094                 if (ret < 0) {
1095                         wl1251_warning("Set slot time failed %d", ret);
1096                         goto out_sleep;
1097                 }
1098         }
1099
1100         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1101                 if (bss_conf->use_short_preamble)
1102                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1103                 else
1104                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1105         }
1106
1107         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1108                 if (bss_conf->use_cts_prot)
1109                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1110                 else
1111                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1112                 if (ret < 0) {
1113                         wl1251_warning("Set ctsprotect failed %d", ret);
1114                         goto out;
1115                 }
1116         }
1117
1118         if (changed & BSS_CHANGED_BSSID) {
1119                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1120
1121                 ret = wl1251_build_null_data(wl);
1122                 if (ret < 0)
1123                         goto out;
1124
1125                 if (wl->bss_type != BSS_TYPE_IBSS) {
1126                         ret = wl1251_cmd_join(wl, wl->bss_type,
1127                                               wl->beacon_int,
1128                                               wl->dtim_period);
1129                         if (ret < 0)
1130                                 goto out_sleep;
1131                         wl1251_warning("Set ctsprotect failed %d", ret);
1132                         goto out_sleep;
1133                 }
1134         }
1135
1136         if (changed & BSS_CHANGED_BEACON) {
1137                 beacon = ieee80211_beacon_get(hw, vif);
1138                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1139                                               beacon->len);
1140
1141                 if (ret < 0) {
1142                         dev_kfree_skb(beacon);
1143                         goto out;
1144                 }
1145
1146                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1147                                               beacon->len);
1148
1149                 dev_kfree_skb(beacon);
1150
1151                 if (ret < 0)
1152                         goto out;
1153
1154                 ret = wl1251_cmd_join(wl, wl->bss_type, wl->beacon_int,
1155                                       wl->dtim_period);
1156
1157                 if (ret < 0)
1158                         goto out;
1159         }
1160
1161 out_sleep:
1162         wl1251_ps_elp_sleep(wl);
1163
1164 out:
1165         mutex_unlock(&wl->mutex);
1166 }
1167
1168
1169 /* can't be const, mac80211 writes to this */
1170 static struct ieee80211_rate wl1251_rates[] = {
1171         { .bitrate = 10,
1172           .hw_value = 0x1,
1173           .hw_value_short = 0x1, },
1174         { .bitrate = 20,
1175           .hw_value = 0x2,
1176           .hw_value_short = 0x2,
1177           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1178         { .bitrate = 55,
1179           .hw_value = 0x4,
1180           .hw_value_short = 0x4,
1181           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1182         { .bitrate = 110,
1183           .hw_value = 0x20,
1184           .hw_value_short = 0x20,
1185           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1186         { .bitrate = 60,
1187           .hw_value = 0x8,
1188           .hw_value_short = 0x8, },
1189         { .bitrate = 90,
1190           .hw_value = 0x10,
1191           .hw_value_short = 0x10, },
1192         { .bitrate = 120,
1193           .hw_value = 0x40,
1194           .hw_value_short = 0x40, },
1195         { .bitrate = 180,
1196           .hw_value = 0x80,
1197           .hw_value_short = 0x80, },
1198         { .bitrate = 240,
1199           .hw_value = 0x200,
1200           .hw_value_short = 0x200, },
1201         { .bitrate = 360,
1202          .hw_value = 0x400,
1203          .hw_value_short = 0x400, },
1204         { .bitrate = 480,
1205           .hw_value = 0x800,
1206           .hw_value_short = 0x800, },
1207         { .bitrate = 540,
1208           .hw_value = 0x1000,
1209           .hw_value_short = 0x1000, },
1210 };
1211
1212 /* can't be const, mac80211 writes to this */
1213 static struct ieee80211_channel wl1251_channels[] = {
1214         { .hw_value = 1, .center_freq = 2412},
1215         { .hw_value = 2, .center_freq = 2417},
1216         { .hw_value = 3, .center_freq = 2422},
1217         { .hw_value = 4, .center_freq = 2427},
1218         { .hw_value = 5, .center_freq = 2432},
1219         { .hw_value = 6, .center_freq = 2437},
1220         { .hw_value = 7, .center_freq = 2442},
1221         { .hw_value = 8, .center_freq = 2447},
1222         { .hw_value = 9, .center_freq = 2452},
1223         { .hw_value = 10, .center_freq = 2457},
1224         { .hw_value = 11, .center_freq = 2462},
1225         { .hw_value = 12, .center_freq = 2467},
1226         { .hw_value = 13, .center_freq = 2472},
1227 };
1228
1229 /* can't be const, mac80211 writes to this */
1230 static struct ieee80211_supported_band wl1251_band_2ghz = {
1231         .channels = wl1251_channels,
1232         .n_channels = ARRAY_SIZE(wl1251_channels),
1233         .bitrates = wl1251_rates,
1234         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1235 };
1236
1237 static const struct ieee80211_ops wl1251_ops = {
1238         .start = wl1251_op_start,
1239         .stop = wl1251_op_stop,
1240         .add_interface = wl1251_op_add_interface,
1241         .remove_interface = wl1251_op_remove_interface,
1242         .config = wl1251_op_config,
1243         .configure_filter = wl1251_op_configure_filter,
1244         .tx = wl1251_op_tx,
1245         .set_key = wl1251_op_set_key,
1246         .hw_scan = wl1251_op_hw_scan,
1247         .bss_info_changed = wl1251_op_bss_info_changed,
1248         .set_rts_threshold = wl1251_op_set_rts_threshold,
1249 };
1250
1251 static int wl1251_register_hw(struct wl1251 *wl)
1252 {
1253         int ret;
1254
1255         if (wl->mac80211_registered)
1256                 return 0;
1257
1258         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1259
1260         ret = ieee80211_register_hw(wl->hw);
1261         if (ret < 0) {
1262                 wl1251_error("unable to register mac80211 hw: %d", ret);
1263                 return ret;
1264         }
1265
1266         wl->mac80211_registered = true;
1267
1268         wl1251_notice("loaded");
1269
1270         return 0;
1271 }
1272
1273 int wl1251_init_ieee80211(struct wl1251 *wl)
1274 {
1275         int ret;
1276
1277         /* The tx descriptor buffer and the TKIP space */
1278         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1279                 + WL1251_TKIP_IV_SPACE;
1280
1281         /* unit us */
1282         /* FIXME: find a proper value */
1283         wl->hw->channel_change_time = 10000;
1284
1285         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1286                 IEEE80211_HW_NOISE_DBM;
1287
1288         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1289         wl->hw->wiphy->max_scan_ssids = 1;
1290         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1291
1292         ret = wl1251_register_hw(wl);
1293         if (ret)
1294                 goto out;
1295
1296         wl1251_debugfs_init(wl);
1297         wl1251_notice("initialized");
1298
1299         ret = 0;
1300
1301 out:
1302         return ret;
1303 }
1304 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1305
1306 struct ieee80211_hw *wl1251_alloc_hw(void)
1307 {
1308         struct ieee80211_hw *hw;
1309         struct wl1251 *wl;
1310         int i;
1311         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1312
1313         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1314         if (!hw) {
1315                 wl1251_error("could not alloc ieee80211_hw");
1316                 return ERR_PTR(-ENOMEM);
1317         }
1318
1319         wl = hw->priv;
1320         memset(wl, 0, sizeof(*wl));
1321
1322         wl->hw = hw;
1323
1324         wl->data_in_count = 0;
1325
1326         skb_queue_head_init(&wl->tx_queue);
1327
1328         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1329         wl->channel = WL1251_DEFAULT_CHANNEL;
1330         wl->scanning = false;
1331         wl->default_key = 0;
1332         wl->listen_int = 1;
1333         wl->rx_counter = 0;
1334         wl->rx_handled = 0;
1335         wl->rx_current_buffer = 0;
1336         wl->rx_last_id = 0;
1337         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1338         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1339         wl->elp = false;
1340         wl->psm = 0;
1341         wl->psm_requested = false;
1342         wl->tx_queue_stopped = false;
1343         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1344         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1345         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1346
1347         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1348                 wl->tx_frames[i] = NULL;
1349
1350         wl->next_tx_complete = 0;
1351
1352         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1353         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1354
1355         /*
1356          * In case our MAC address is not correctly set,
1357          * we use a random but Nokia MAC.
1358          */
1359         memcpy(wl->mac_addr, nokia_oui, 3);
1360         get_random_bytes(wl->mac_addr + 3, 3);
1361
1362         wl->state = WL1251_STATE_OFF;
1363         mutex_init(&wl->mutex);
1364
1365         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1366         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1367
1368         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1369         if (!wl->rx_descriptor) {
1370                 wl1251_error("could not allocate memory for rx descriptor");
1371                 ieee80211_free_hw(hw);
1372                 return ERR_PTR(-ENOMEM);
1373         }
1374
1375         return hw;
1376 }
1377 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1378
1379 int wl1251_free_hw(struct wl1251 *wl)
1380 {
1381         ieee80211_unregister_hw(wl->hw);
1382
1383         wl1251_debugfs_exit(wl);
1384
1385         kfree(wl->target_mem_map);
1386         kfree(wl->data_path);
1387         kfree(wl->fw);
1388         wl->fw = NULL;
1389         kfree(wl->nvs);
1390         wl->nvs = NULL;
1391
1392         kfree(wl->rx_descriptor);
1393         wl->rx_descriptor = NULL;
1394
1395         ieee80211_free_hw(wl->hw);
1396
1397         return 0;
1398 }
1399 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1400
1401 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1402 MODULE_LICENSE("GPL");
1403 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>");
1404 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");