wl1251: reorder wl1251_cmd_join() arguments
[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         /* FIXME: replace the magic numbers with proper definitions */
328         ret = wl1251_cmd_join(wl, wl->bss_type, 100, 1, false);
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
465         wl1251_debugfs_reset(wl);
466
467         mutex_unlock(&wl->mutex);
468 }
469
470 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
471                                    struct ieee80211_if_init_conf *conf)
472 {
473         struct wl1251 *wl = hw->priv;
474         int ret = 0;
475
476         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
477                      conf->type, conf->mac_addr);
478
479         mutex_lock(&wl->mutex);
480
481         switch (conf->type) {
482         case NL80211_IFTYPE_STATION:
483                 wl->bss_type = BSS_TYPE_STA_BSS;
484                 break;
485         case NL80211_IFTYPE_ADHOC:
486                 wl->bss_type = BSS_TYPE_IBSS;
487                 break;
488         default:
489                 ret = -EOPNOTSUPP;
490                 goto out;
491         }
492
493         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
494                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
495                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
496                 ret = wl1251_acx_station_id(wl);
497                 if (ret < 0)
498                         goto out;
499         }
500
501 out:
502         mutex_unlock(&wl->mutex);
503         return ret;
504 }
505
506 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
507                                          struct ieee80211_if_init_conf *conf)
508 {
509         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
510 }
511
512 static int wl1251_build_null_data(struct wl1251 *wl)
513 {
514         struct wl12xx_null_data_template template;
515
516         if (!is_zero_ether_addr(wl->bssid)) {
517                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
518                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
519         } else {
520                 memset(template.header.da, 0xff, ETH_ALEN);
521                 memset(template.header.bssid, 0xff, ETH_ALEN);
522         }
523
524         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
525         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
526                                                 IEEE80211_STYPE_NULLFUNC);
527
528         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
529                                        sizeof(template));
530
531 }
532
533 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
534 {
535         struct wl12xx_ps_poll_template template;
536
537         memcpy(template.bssid, wl->bssid, ETH_ALEN);
538         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
539         template.aid = aid;
540         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
541
542         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
543                                        sizeof(template));
544
545 }
546
547 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
548 {
549         struct wl1251 *wl = hw->priv;
550         struct ieee80211_conf *conf = &hw->conf;
551         int channel, ret = 0;
552
553         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
554
555         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
556                      channel,
557                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
558                      conf->power_level);
559
560         mutex_lock(&wl->mutex);
561
562         ret = wl1251_ps_elp_wakeup(wl);
563         if (ret < 0)
564                 goto out;
565
566         if (channel != wl->channel) {
567                 /* FIXME: use beacon interval provided by mac80211 */
568                 ret = wl1251_cmd_join(wl, wl->bss_type, 100, 1, false);
569                 if (ret < 0)
570                         goto out_sleep;
571
572                 wl->channel = channel;
573         }
574
575         ret = wl1251_build_null_data(wl);
576         if (ret < 0)
577                 goto out_sleep;
578
579         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
580                 wl1251_debug(DEBUG_PSM, "psm enabled");
581
582                 wl->psm_requested = true;
583
584                 /*
585                  * We enter PSM only if we're already associated.
586                  * If we're not, we'll enter it when joining an SSID,
587                  * through the bss_info_changed() hook.
588                  */
589                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
590         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
591                    wl->psm_requested) {
592                 wl1251_debug(DEBUG_PSM, "psm disabled");
593
594                 wl->psm_requested = false;
595
596                 if (wl->psm)
597                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
598         }
599
600         if (conf->power_level != wl->power_level) {
601                 ret = wl1251_acx_tx_power(wl, conf->power_level);
602                 if (ret < 0)
603                         goto out;
604
605                 wl->power_level = conf->power_level;
606         }
607
608 out_sleep:
609         wl1251_ps_elp_sleep(wl);
610
611 out:
612         mutex_unlock(&wl->mutex);
613
614         return ret;
615 }
616
617 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
618                                   FIF_ALLMULTI | \
619                                   FIF_FCSFAIL | \
620                                   FIF_BCN_PRBRESP_PROMISC | \
621                                   FIF_CONTROL | \
622                                   FIF_OTHER_BSS)
623
624 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
625                                        unsigned int changed,
626                                        unsigned int *total,
627                                        int mc_count,
628                                        struct dev_addr_list *mc_list)
629 {
630         struct wl1251 *wl = hw->priv;
631
632         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
633
634         *total &= WL1251_SUPPORTED_FILTERS;
635         changed &= WL1251_SUPPORTED_FILTERS;
636
637         if (changed == 0)
638                 /* no filters which we support changed */
639                 return;
640
641         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
642
643         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
644         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
645
646         if (*total & FIF_PROMISC_IN_BSS) {
647                 wl->rx_config |= CFG_BSSID_FILTER_EN;
648                 wl->rx_config |= CFG_RX_ALL_GOOD;
649         }
650         if (*total & FIF_ALLMULTI)
651                 /*
652                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
653                  * all multicast frames
654                  */
655                 wl->rx_config &= ~CFG_MC_FILTER_EN;
656         if (*total & FIF_FCSFAIL)
657                 wl->rx_filter |= CFG_RX_FCS_ERROR;
658         if (*total & FIF_BCN_PRBRESP_PROMISC) {
659                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
660                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
661         }
662         if (*total & FIF_CONTROL)
663                 wl->rx_filter |= CFG_RX_CTL_EN;
664         if (*total & FIF_OTHER_BSS)
665                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
666
667         /*
668          * FIXME: workqueues need to be properly cancelled on stop(), for
669          * now let's just disable changing the filter settings. They will
670          * be updated any on config().
671          */
672         /* schedule_work(&wl->filter_work); */
673 }
674
675 /* HW encryption */
676 static int wl1251_set_key_type(struct wl1251 *wl,
677                                struct wl1251_cmd_set_keys *key,
678                                enum set_key_cmd cmd,
679                                struct ieee80211_key_conf *mac80211_key,
680                                const u8 *addr)
681 {
682         switch (mac80211_key->alg) {
683         case ALG_WEP:
684                 if (is_broadcast_ether_addr(addr))
685                         key->key_type = KEY_WEP_DEFAULT;
686                 else
687                         key->key_type = KEY_WEP_ADDR;
688
689                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
690                 break;
691         case ALG_TKIP:
692                 if (is_broadcast_ether_addr(addr))
693                         key->key_type = KEY_TKIP_MIC_GROUP;
694                 else
695                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
696
697                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
698                 break;
699         case ALG_CCMP:
700                 if (is_broadcast_ether_addr(addr))
701                         key->key_type = KEY_AES_GROUP;
702                 else
703                         key->key_type = KEY_AES_PAIRWISE;
704                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
705                 break;
706         default:
707                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
708                 return -EOPNOTSUPP;
709         }
710
711         return 0;
712 }
713
714 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
715                              struct ieee80211_vif *vif,
716                              struct ieee80211_sta *sta,
717                              struct ieee80211_key_conf *key)
718 {
719         struct wl1251 *wl = hw->priv;
720         struct wl1251_cmd_set_keys *wl_cmd;
721         const u8 *addr;
722         int ret;
723
724         static const u8 bcast_addr[ETH_ALEN] =
725                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
726
727         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
728
729         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
730         if (!wl_cmd) {
731                 ret = -ENOMEM;
732                 goto out;
733         }
734
735         addr = sta ? sta->addr : bcast_addr;
736
737         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
738         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
739         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
740                      key->alg, key->keyidx, key->keylen, key->flags);
741         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
742
743         if (is_zero_ether_addr(addr)) {
744                 /* We dont support TX only encryption */
745                 ret = -EOPNOTSUPP;
746                 goto out;
747         }
748
749         mutex_lock(&wl->mutex);
750
751         ret = wl1251_ps_elp_wakeup(wl);
752         if (ret < 0)
753                 goto out_unlock;
754
755         switch (cmd) {
756         case SET_KEY:
757                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
758                 break;
759         case DISABLE_KEY:
760                 wl_cmd->key_action = KEY_REMOVE;
761                 break;
762         default:
763                 wl1251_error("Unsupported key cmd 0x%x", cmd);
764                 break;
765         }
766
767         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
768         if (ret < 0) {
769                 wl1251_error("Set KEY type failed");
770                 goto out_sleep;
771         }
772
773         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
774                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
775
776         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
777             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
778                 /*
779                  * We get the key in the following form:
780                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
781                  * but the target is expecting:
782                  * TKIP - RX MIC - TX MIC
783                  */
784                 memcpy(wl_cmd->key, key->key, 16);
785                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
786                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
787
788         } else {
789                 memcpy(wl_cmd->key, key->key, key->keylen);
790         }
791         wl_cmd->key_size = key->keylen;
792
793         wl_cmd->id = key->keyidx;
794         wl_cmd->ssid_profile = 0;
795
796         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
797
798         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
799         if (ret < 0) {
800                 wl1251_warning("could not set keys");
801                 goto out_sleep;
802         }
803
804 out_sleep:
805         wl1251_ps_elp_sleep(wl);
806
807 out_unlock:
808         mutex_unlock(&wl->mutex);
809
810 out:
811         kfree(wl_cmd);
812
813         return ret;
814 }
815
816 static int wl1251_build_basic_rates(char *rates)
817 {
818         u8 index = 0;
819
820         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
821         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
822         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
823         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
824
825         return index;
826 }
827
828 static int wl1251_build_extended_rates(char *rates)
829 {
830         u8 index = 0;
831
832         rates[index++] = IEEE80211_OFDM_RATE_6MB;
833         rates[index++] = IEEE80211_OFDM_RATE_9MB;
834         rates[index++] = IEEE80211_OFDM_RATE_12MB;
835         rates[index++] = IEEE80211_OFDM_RATE_18MB;
836         rates[index++] = IEEE80211_OFDM_RATE_24MB;
837         rates[index++] = IEEE80211_OFDM_RATE_36MB;
838         rates[index++] = IEEE80211_OFDM_RATE_48MB;
839         rates[index++] = IEEE80211_OFDM_RATE_54MB;
840
841         return index;
842 }
843
844
845 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
846 {
847         struct wl12xx_probe_req_template template;
848         struct wl12xx_ie_rates *rates;
849         char *ptr;
850         u16 size;
851
852         ptr = (char *)&template;
853         size = sizeof(struct ieee80211_header);
854
855         memset(template.header.da, 0xff, ETH_ALEN);
856         memset(template.header.bssid, 0xff, ETH_ALEN);
857         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
858         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
859
860         /* IEs */
861         /* SSID */
862         template.ssid.header.id = WLAN_EID_SSID;
863         template.ssid.header.len = ssid_len;
864         if (ssid_len && ssid)
865                 memcpy(template.ssid.ssid, ssid, ssid_len);
866         size += sizeof(struct wl12xx_ie_header) + ssid_len;
867         ptr += size;
868
869         /* Basic Rates */
870         rates = (struct wl12xx_ie_rates *)ptr;
871         rates->header.id = WLAN_EID_SUPP_RATES;
872         rates->header.len = wl1251_build_basic_rates(rates->rates);
873         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
874         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
875
876         /* Extended rates */
877         rates = (struct wl12xx_ie_rates *)ptr;
878         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
879         rates->header.len = wl1251_build_extended_rates(rates->rates);
880         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
881
882         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
883
884         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
885                                       size);
886 }
887
888 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
889                           u8 active_scan, u8 high_prio, u8 num_channels,
890                           u8 probe_requests)
891 {
892         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
893         struct cmd_scan *params = NULL;
894         int i, ret;
895         u16 scan_options = 0;
896
897         if (wl->scanning)
898                 return -EINVAL;
899
900         params = kzalloc(sizeof(*params), GFP_KERNEL);
901         if (!params)
902                 return -ENOMEM;
903
904         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
905         params->params.rx_filter_options =
906                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
907
908         /* High priority scan */
909         if (!active_scan)
910                 scan_options |= SCAN_PASSIVE;
911         if (high_prio)
912                 scan_options |= SCAN_PRIORITY_HIGH;
913         params->params.scan_options = scan_options;
914
915         params->params.num_channels = num_channels;
916         params->params.num_probe_requests = probe_requests;
917         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
918         params->params.tid_trigger = 0;
919
920         for (i = 0; i < num_channels; i++) {
921                 params->channels[i].min_duration = cpu_to_le32(30000);
922                 params->channels[i].max_duration = cpu_to_le32(60000);
923                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
924                 memset(&params->channels[i].bssid_msb, 0xff, 2);
925                 params->channels[i].early_termination = 0;
926                 params->channels[i].tx_power_att = 0;
927                 params->channels[i].channel = i + 1;
928                 memset(params->channels[i].pad, 0, 3);
929         }
930
931         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
932                 memset(&params->channels[i], 0,
933                        sizeof(struct basic_scan_channel_parameters));
934
935         if (len && ssid) {
936                 params->params.ssid_len = len;
937                 memcpy(params->params.ssid, ssid, len);
938         } else {
939                 params->params.ssid_len = 0;
940                 memset(params->params.ssid, 0, 32);
941         }
942
943         ret = wl1251_build_probe_req(wl, ssid, len);
944         if (ret < 0) {
945                 wl1251_error("PROBE request template failed");
946                 goto out;
947         }
948
949         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
950         if (!trigger)
951                 goto out;
952
953         trigger->timeout = 0;
954
955         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
956                               sizeof(*trigger));
957         if (ret < 0) {
958                 wl1251_error("trigger scan to failed for hw scan");
959                 goto out;
960         }
961
962         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
963
964         wl->scanning = true;
965
966         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
967         if (ret < 0)
968                 wl1251_error("SCAN failed");
969
970         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
971
972         if (params->header.status != CMD_STATUS_SUCCESS) {
973                 wl1251_error("TEST command answer error: %d",
974                              params->header.status);
975                 wl->scanning = false;
976                 ret = -EIO;
977                 goto out;
978         }
979
980 out:
981         kfree(params);
982         return ret;
983
984 }
985
986 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
987                              struct cfg80211_scan_request *req)
988 {
989         struct wl1251 *wl = hw->priv;
990         int ret;
991         u8 *ssid = NULL;
992         size_t ssid_len = 0;
993
994         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
995
996         if (req->n_ssids) {
997                 ssid = req->ssids[0].ssid;
998                 ssid_len = req->ssids[0].ssid_len;
999         }
1000
1001         mutex_lock(&wl->mutex);
1002
1003         ret = wl1251_ps_elp_wakeup(wl);
1004         if (ret < 0)
1005                 goto out;
1006
1007         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1008
1009         wl1251_ps_elp_sleep(wl);
1010
1011 out:
1012         mutex_unlock(&wl->mutex);
1013
1014         return ret;
1015 }
1016
1017 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1018 {
1019         struct wl1251 *wl = hw->priv;
1020         int ret;
1021
1022         mutex_lock(&wl->mutex);
1023
1024         ret = wl1251_ps_elp_wakeup(wl);
1025         if (ret < 0)
1026                 goto out;
1027
1028         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1029         if (ret < 0)
1030                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1031
1032         wl1251_ps_elp_sleep(wl);
1033
1034 out:
1035         mutex_unlock(&wl->mutex);
1036
1037         return ret;
1038 }
1039
1040 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1041                                        struct ieee80211_vif *vif,
1042                                        struct ieee80211_bss_conf *bss_conf,
1043                                        u32 changed)
1044 {
1045         enum wl1251_cmd_ps_mode mode;
1046         struct wl1251 *wl = hw->priv;
1047         struct sk_buff *beacon;
1048         int ret;
1049
1050         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1051
1052         mutex_lock(&wl->mutex);
1053
1054         ret = wl1251_ps_elp_wakeup(wl);
1055         if (ret < 0)
1056                 goto out;
1057
1058         if (changed & BSS_CHANGED_ASSOC) {
1059                 if (bss_conf->assoc) {
1060                         wl->aid = bss_conf->aid;
1061
1062                         ret = wl1251_build_ps_poll(wl, wl->aid);
1063                         if (ret < 0)
1064                                 goto out_sleep;
1065
1066                         ret = wl1251_acx_aid(wl, wl->aid);
1067                         if (ret < 0)
1068                                 goto out_sleep;
1069
1070                         /* If we want to go in PSM but we're not there yet */
1071                         if (wl->psm_requested && !wl->psm) {
1072                                 mode = STATION_POWER_SAVE_MODE;
1073                                 ret = wl1251_ps_set_mode(wl, mode);
1074                                 if (ret < 0)
1075                                         goto out_sleep;
1076                         }
1077                 }
1078         }
1079         if (changed & BSS_CHANGED_ERP_SLOT) {
1080                 if (bss_conf->use_short_slot)
1081                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1082                 else
1083                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1084                 if (ret < 0) {
1085                         wl1251_warning("Set slot time failed %d", ret);
1086                         goto out_sleep;
1087                 }
1088         }
1089
1090         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1091                 if (bss_conf->use_short_preamble)
1092                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1093                 else
1094                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1095         }
1096
1097         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1098                 if (bss_conf->use_cts_prot)
1099                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1100                 else
1101                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1102                 if (ret < 0) {
1103                         wl1251_warning("Set ctsprotect failed %d", ret);
1104                         goto out;
1105                 }
1106         }
1107
1108         if (changed & BSS_CHANGED_BSSID) {
1109                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1110
1111                 ret = wl1251_build_null_data(wl);
1112                 if (ret < 0)
1113                         goto out;
1114
1115                 if (wl->bss_type != BSS_TYPE_IBSS) {
1116                         ret = wl1251_cmd_join(wl, wl->bss_type, 100, 5, true);
1117                         if (ret < 0)
1118                                 goto out_sleep;
1119                         wl1251_warning("Set ctsprotect failed %d", ret);
1120                         goto out_sleep;
1121                 }
1122         }
1123
1124         if (changed & BSS_CHANGED_BEACON) {
1125                 beacon = ieee80211_beacon_get(hw, vif);
1126                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1127                                               beacon->len);
1128
1129                 if (ret < 0) {
1130                         dev_kfree_skb(beacon);
1131                         goto out;
1132                 }
1133
1134                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1135                                               beacon->len);
1136
1137                 dev_kfree_skb(beacon);
1138
1139                 if (ret < 0)
1140                         goto out;
1141
1142                 ret = wl1251_cmd_join(wl, wl->bss_type, 100, 1, false);
1143
1144                 if (ret < 0)
1145                         goto out;
1146         }
1147
1148 out_sleep:
1149         wl1251_ps_elp_sleep(wl);
1150
1151 out:
1152         mutex_unlock(&wl->mutex);
1153 }
1154
1155
1156 /* can't be const, mac80211 writes to this */
1157 static struct ieee80211_rate wl1251_rates[] = {
1158         { .bitrate = 10,
1159           .hw_value = 0x1,
1160           .hw_value_short = 0x1, },
1161         { .bitrate = 20,
1162           .hw_value = 0x2,
1163           .hw_value_short = 0x2,
1164           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1165         { .bitrate = 55,
1166           .hw_value = 0x4,
1167           .hw_value_short = 0x4,
1168           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1169         { .bitrate = 110,
1170           .hw_value = 0x20,
1171           .hw_value_short = 0x20,
1172           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1173         { .bitrate = 60,
1174           .hw_value = 0x8,
1175           .hw_value_short = 0x8, },
1176         { .bitrate = 90,
1177           .hw_value = 0x10,
1178           .hw_value_short = 0x10, },
1179         { .bitrate = 120,
1180           .hw_value = 0x40,
1181           .hw_value_short = 0x40, },
1182         { .bitrate = 180,
1183           .hw_value = 0x80,
1184           .hw_value_short = 0x80, },
1185         { .bitrate = 240,
1186           .hw_value = 0x200,
1187           .hw_value_short = 0x200, },
1188         { .bitrate = 360,
1189          .hw_value = 0x400,
1190          .hw_value_short = 0x400, },
1191         { .bitrate = 480,
1192           .hw_value = 0x800,
1193           .hw_value_short = 0x800, },
1194         { .bitrate = 540,
1195           .hw_value = 0x1000,
1196           .hw_value_short = 0x1000, },
1197 };
1198
1199 /* can't be const, mac80211 writes to this */
1200 static struct ieee80211_channel wl1251_channels[] = {
1201         { .hw_value = 1, .center_freq = 2412},
1202         { .hw_value = 2, .center_freq = 2417},
1203         { .hw_value = 3, .center_freq = 2422},
1204         { .hw_value = 4, .center_freq = 2427},
1205         { .hw_value = 5, .center_freq = 2432},
1206         { .hw_value = 6, .center_freq = 2437},
1207         { .hw_value = 7, .center_freq = 2442},
1208         { .hw_value = 8, .center_freq = 2447},
1209         { .hw_value = 9, .center_freq = 2452},
1210         { .hw_value = 10, .center_freq = 2457},
1211         { .hw_value = 11, .center_freq = 2462},
1212         { .hw_value = 12, .center_freq = 2467},
1213         { .hw_value = 13, .center_freq = 2472},
1214 };
1215
1216 /* can't be const, mac80211 writes to this */
1217 static struct ieee80211_supported_band wl1251_band_2ghz = {
1218         .channels = wl1251_channels,
1219         .n_channels = ARRAY_SIZE(wl1251_channels),
1220         .bitrates = wl1251_rates,
1221         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1222 };
1223
1224 static const struct ieee80211_ops wl1251_ops = {
1225         .start = wl1251_op_start,
1226         .stop = wl1251_op_stop,
1227         .add_interface = wl1251_op_add_interface,
1228         .remove_interface = wl1251_op_remove_interface,
1229         .config = wl1251_op_config,
1230         .configure_filter = wl1251_op_configure_filter,
1231         .tx = wl1251_op_tx,
1232         .set_key = wl1251_op_set_key,
1233         .hw_scan = wl1251_op_hw_scan,
1234         .bss_info_changed = wl1251_op_bss_info_changed,
1235         .set_rts_threshold = wl1251_op_set_rts_threshold,
1236 };
1237
1238 static int wl1251_register_hw(struct wl1251 *wl)
1239 {
1240         int ret;
1241
1242         if (wl->mac80211_registered)
1243                 return 0;
1244
1245         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1246
1247         ret = ieee80211_register_hw(wl->hw);
1248         if (ret < 0) {
1249                 wl1251_error("unable to register mac80211 hw: %d", ret);
1250                 return ret;
1251         }
1252
1253         wl->mac80211_registered = true;
1254
1255         wl1251_notice("loaded");
1256
1257         return 0;
1258 }
1259
1260 int wl1251_init_ieee80211(struct wl1251 *wl)
1261 {
1262         int ret;
1263
1264         /* The tx descriptor buffer and the TKIP space */
1265         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1266                 + WL1251_TKIP_IV_SPACE;
1267
1268         /* unit us */
1269         /* FIXME: find a proper value */
1270         wl->hw->channel_change_time = 10000;
1271
1272         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1273                 IEEE80211_HW_NOISE_DBM;
1274
1275         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1276         wl->hw->wiphy->max_scan_ssids = 1;
1277         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1278
1279         ret = wl1251_register_hw(wl);
1280         if (ret)
1281                 goto out;
1282
1283         wl1251_debugfs_init(wl);
1284         wl1251_notice("initialized");
1285
1286         ret = 0;
1287
1288 out:
1289         return ret;
1290 }
1291 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1292
1293 #define WL1251_DEFAULT_CHANNEL 1
1294 struct ieee80211_hw *wl1251_alloc_hw(void)
1295 {
1296         struct ieee80211_hw *hw;
1297         struct wl1251 *wl;
1298         int i;
1299         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1300
1301         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1302         if (!hw) {
1303                 wl1251_error("could not alloc ieee80211_hw");
1304                 return ERR_PTR(-ENOMEM);
1305         }
1306
1307         wl = hw->priv;
1308         memset(wl, 0, sizeof(*wl));
1309
1310         wl->hw = hw;
1311
1312         wl->data_in_count = 0;
1313
1314         skb_queue_head_init(&wl->tx_queue);
1315
1316         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1317         wl->channel = WL1251_DEFAULT_CHANNEL;
1318         wl->scanning = false;
1319         wl->default_key = 0;
1320         wl->listen_int = 1;
1321         wl->rx_counter = 0;
1322         wl->rx_handled = 0;
1323         wl->rx_current_buffer = 0;
1324         wl->rx_last_id = 0;
1325         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1326         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1327         wl->elp = false;
1328         wl->psm = 0;
1329         wl->psm_requested = false;
1330         wl->tx_queue_stopped = false;
1331         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1332
1333         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1334                 wl->tx_frames[i] = NULL;
1335
1336         wl->next_tx_complete = 0;
1337
1338         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1339         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1340
1341         /*
1342          * In case our MAC address is not correctly set,
1343          * we use a random but Nokia MAC.
1344          */
1345         memcpy(wl->mac_addr, nokia_oui, 3);
1346         get_random_bytes(wl->mac_addr + 3, 3);
1347
1348         wl->state = WL1251_STATE_OFF;
1349         mutex_init(&wl->mutex);
1350
1351         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1352         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1353
1354         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1355         if (!wl->rx_descriptor) {
1356                 wl1251_error("could not allocate memory for rx descriptor");
1357                 ieee80211_free_hw(hw);
1358                 return ERR_PTR(-ENOMEM);
1359         }
1360
1361         return hw;
1362 }
1363 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1364
1365 int wl1251_free_hw(struct wl1251 *wl)
1366 {
1367         ieee80211_unregister_hw(wl->hw);
1368
1369         wl1251_debugfs_exit(wl);
1370
1371         kfree(wl->target_mem_map);
1372         kfree(wl->data_path);
1373         kfree(wl->fw);
1374         wl->fw = NULL;
1375         kfree(wl->nvs);
1376         wl->nvs = NULL;
1377
1378         kfree(wl->rx_descriptor);
1379         wl->rx_descriptor = NULL;
1380
1381         ieee80211_free_hw(wl->hw);
1382
1383         return 0;
1384 }
1385 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1386
1387 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1388 MODULE_LICENSE("GPL");
1389 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>");
1390 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");