spi: prefix modalias with "spi:"
[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 "wl1251_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 int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
313                        u16 beacon_interval, u8 dtim_period)
314 {
315         int ret;
316
317         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
318                                      DEFAULT_HW_GEN_MODULATION_TYPE,
319                                      wl->tx_mgmt_frm_rate,
320                                      wl->tx_mgmt_frm_mod);
321         if (ret < 0)
322                 goto out;
323
324
325         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
326                               dtim_period);
327         if (ret < 0)
328                 goto out;
329
330         /*
331          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
332          * locking we just sleep instead, for now
333          */
334         msleep(10);
335
336 out:
337         return ret;
338 }
339
340 static void wl1251_filter_work(struct work_struct *work)
341 {
342         struct wl1251 *wl =
343                 container_of(work, struct wl1251, filter_work);
344         int ret;
345
346         mutex_lock(&wl->mutex);
347
348         if (wl->state == WL1251_STATE_OFF)
349                 goto out;
350
351         ret = wl1251_ps_elp_wakeup(wl);
352         if (ret < 0)
353                 goto out;
354
355         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
356                           wl->dtim_period);
357         if (ret < 0)
358                 goto out_sleep;
359
360 out_sleep:
361         wl1251_ps_elp_sleep(wl);
362
363 out:
364         mutex_unlock(&wl->mutex);
365 }
366
367 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
368 {
369         struct wl1251 *wl = hw->priv;
370
371         skb_queue_tail(&wl->tx_queue, skb);
372
373         /*
374          * The chip specific setup must run before the first TX packet -
375          * before that, the tx_work will not be initialized!
376          */
377
378         ieee80211_queue_work(wl->hw, &wl->tx_work);
379
380         /*
381          * The workqueue is slow to process the tx_queue and we need stop
382          * the queue here, otherwise the queue will get too long.
383          */
384         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
385                 ieee80211_stop_queues(wl->hw);
386
387                 /*
388                  * FIXME: this is racy, the variable is not properly
389                  * protected. Maybe fix this by removing the stupid
390                  * variable altogether and checking the real queue state?
391                  */
392                 wl->tx_queue_stopped = true;
393         }
394
395         return NETDEV_TX_OK;
396 }
397
398 static int wl1251_op_start(struct ieee80211_hw *hw)
399 {
400         struct wl1251 *wl = hw->priv;
401         int ret = 0;
402
403         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
404
405         mutex_lock(&wl->mutex);
406
407         if (wl->state != WL1251_STATE_OFF) {
408                 wl1251_error("cannot start because not in off state: %d",
409                              wl->state);
410                 ret = -EBUSY;
411                 goto out;
412         }
413
414         ret = wl1251_chip_wakeup(wl);
415         if (ret < 0)
416                 goto out;
417
418         ret = wl1251_boot(wl);
419         if (ret < 0)
420                 goto out;
421
422         ret = wl1251_hw_init(wl);
423         if (ret < 0)
424                 goto out;
425
426         ret = wl1251_acx_station_id(wl);
427         if (ret < 0)
428                 goto out;
429
430         wl->state = WL1251_STATE_ON;
431
432         wl1251_info("firmware booted (%s)", wl->fw_ver);
433
434 out:
435         if (ret < 0)
436                 wl1251_power_off(wl);
437
438         mutex_unlock(&wl->mutex);
439
440         return ret;
441 }
442
443 static void wl1251_op_stop(struct ieee80211_hw *hw)
444 {
445         struct wl1251 *wl = hw->priv;
446
447         wl1251_info("down");
448
449         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
450
451         mutex_lock(&wl->mutex);
452
453         WARN_ON(wl->state != WL1251_STATE_ON);
454
455         if (wl->scanning) {
456                 mutex_unlock(&wl->mutex);
457                 ieee80211_scan_completed(wl->hw, true);
458                 mutex_lock(&wl->mutex);
459                 wl->scanning = false;
460         }
461
462         wl->state = WL1251_STATE_OFF;
463
464         wl1251_disable_interrupts(wl);
465
466         mutex_unlock(&wl->mutex);
467
468         cancel_work_sync(&wl->irq_work);
469         cancel_work_sync(&wl->tx_work);
470         cancel_work_sync(&wl->filter_work);
471
472         mutex_lock(&wl->mutex);
473
474         /* let's notify MAC80211 about the remaining pending TX frames */
475         wl1251_tx_flush(wl);
476         wl1251_power_off(wl);
477
478         memset(wl->bssid, 0, ETH_ALEN);
479         wl->listen_int = 1;
480         wl->bss_type = MAX_BSS_TYPE;
481
482         wl->data_in_count = 0;
483         wl->rx_counter = 0;
484         wl->rx_handled = 0;
485         wl->rx_current_buffer = 0;
486         wl->rx_last_id = 0;
487         wl->next_tx_complete = 0;
488         wl->elp = false;
489         wl->psm = 0;
490         wl->tx_queue_stopped = false;
491         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
492         wl->channel = WL1251_DEFAULT_CHANNEL;
493
494         wl1251_debugfs_reset(wl);
495
496         mutex_unlock(&wl->mutex);
497 }
498
499 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
500                                    struct ieee80211_if_init_conf *conf)
501 {
502         struct wl1251 *wl = hw->priv;
503         int ret = 0;
504
505         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
506                      conf->type, conf->mac_addr);
507
508         mutex_lock(&wl->mutex);
509
510         switch (conf->type) {
511         case NL80211_IFTYPE_STATION:
512                 wl->bss_type = BSS_TYPE_STA_BSS;
513                 break;
514         case NL80211_IFTYPE_ADHOC:
515                 wl->bss_type = BSS_TYPE_IBSS;
516                 break;
517         default:
518                 ret = -EOPNOTSUPP;
519                 goto out;
520         }
521
522         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
523                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
524                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
525                 ret = wl1251_acx_station_id(wl);
526                 if (ret < 0)
527                         goto out;
528         }
529
530 out:
531         mutex_unlock(&wl->mutex);
532         return ret;
533 }
534
535 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
536                                          struct ieee80211_if_init_conf *conf)
537 {
538         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
539 }
540
541 static int wl1251_build_null_data(struct wl1251 *wl)
542 {
543         struct wl12xx_null_data_template template;
544
545         if (!is_zero_ether_addr(wl->bssid)) {
546                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
547                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
548         } else {
549                 memset(template.header.da, 0xff, ETH_ALEN);
550                 memset(template.header.bssid, 0xff, ETH_ALEN);
551         }
552
553         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
554         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
555                                                 IEEE80211_STYPE_NULLFUNC);
556
557         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
558                                        sizeof(template));
559
560 }
561
562 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
563 {
564         struct wl12xx_ps_poll_template template;
565
566         memcpy(template.bssid, wl->bssid, ETH_ALEN);
567         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
568         template.aid = aid;
569         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
570
571         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
572                                        sizeof(template));
573
574 }
575
576 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
577 {
578         struct wl1251 *wl = hw->priv;
579         struct ieee80211_conf *conf = &hw->conf;
580         int channel, ret = 0;
581
582         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
583
584         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
585                      channel,
586                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
587                      conf->power_level);
588
589         mutex_lock(&wl->mutex);
590
591         ret = wl1251_ps_elp_wakeup(wl);
592         if (ret < 0)
593                 goto out;
594
595         if (channel != wl->channel) {
596                 wl->channel = channel;
597
598                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
599                                   wl->beacon_int, wl->dtim_period);
600                 if (ret < 0)
601                         goto out_sleep;
602         }
603
604         ret = wl1251_build_null_data(wl);
605         if (ret < 0)
606                 goto out_sleep;
607
608         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
609                 wl1251_debug(DEBUG_PSM, "psm enabled");
610
611                 wl->psm_requested = true;
612
613                 /*
614                  * We enter PSM only if we're already associated.
615                  * If we're not, we'll enter it when joining an SSID,
616                  * through the bss_info_changed() hook.
617                  */
618                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
619         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
620                    wl->psm_requested) {
621                 wl1251_debug(DEBUG_PSM, "psm disabled");
622
623                 wl->psm_requested = false;
624
625                 if (wl->psm)
626                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
627         }
628
629         if (conf->power_level != wl->power_level) {
630                 ret = wl1251_acx_tx_power(wl, conf->power_level);
631                 if (ret < 0)
632                         goto out;
633
634                 wl->power_level = conf->power_level;
635         }
636
637 out_sleep:
638         wl1251_ps_elp_sleep(wl);
639
640 out:
641         mutex_unlock(&wl->mutex);
642
643         return ret;
644 }
645
646 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
647                                   FIF_ALLMULTI | \
648                                   FIF_FCSFAIL | \
649                                   FIF_BCN_PRBRESP_PROMISC | \
650                                   FIF_CONTROL | \
651                                   FIF_OTHER_BSS)
652
653 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
654                                        unsigned int changed,
655                                        unsigned int *total,u64 multicast)
656 {
657         struct wl1251 *wl = hw->priv;
658
659         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
660
661         *total &= WL1251_SUPPORTED_FILTERS;
662         changed &= WL1251_SUPPORTED_FILTERS;
663
664         if (changed == 0)
665                 /* no filters which we support changed */
666                 return;
667
668         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
669
670         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
671         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
672
673         if (*total & FIF_PROMISC_IN_BSS) {
674                 wl->rx_config |= CFG_BSSID_FILTER_EN;
675                 wl->rx_config |= CFG_RX_ALL_GOOD;
676         }
677         if (*total & FIF_ALLMULTI)
678                 /*
679                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
680                  * all multicast frames
681                  */
682                 wl->rx_config &= ~CFG_MC_FILTER_EN;
683         if (*total & FIF_FCSFAIL)
684                 wl->rx_filter |= CFG_RX_FCS_ERROR;
685         if (*total & FIF_BCN_PRBRESP_PROMISC) {
686                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
687                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
688         }
689         if (*total & FIF_CONTROL)
690                 wl->rx_filter |= CFG_RX_CTL_EN;
691         if (*total & FIF_OTHER_BSS)
692                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
693
694         /*
695          * FIXME: workqueues need to be properly cancelled on stop(), for
696          * now let's just disable changing the filter settings. They will
697          * be updated any on config().
698          */
699         /* schedule_work(&wl->filter_work); */
700 }
701
702 /* HW encryption */
703 static int wl1251_set_key_type(struct wl1251 *wl,
704                                struct wl1251_cmd_set_keys *key,
705                                enum set_key_cmd cmd,
706                                struct ieee80211_key_conf *mac80211_key,
707                                const u8 *addr)
708 {
709         switch (mac80211_key->alg) {
710         case ALG_WEP:
711                 if (is_broadcast_ether_addr(addr))
712                         key->key_type = KEY_WEP_DEFAULT;
713                 else
714                         key->key_type = KEY_WEP_ADDR;
715
716                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
717                 break;
718         case ALG_TKIP:
719                 if (is_broadcast_ether_addr(addr))
720                         key->key_type = KEY_TKIP_MIC_GROUP;
721                 else
722                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
723
724                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
725                 break;
726         case ALG_CCMP:
727                 if (is_broadcast_ether_addr(addr))
728                         key->key_type = KEY_AES_GROUP;
729                 else
730                         key->key_type = KEY_AES_PAIRWISE;
731                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
732                 break;
733         default:
734                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
735                 return -EOPNOTSUPP;
736         }
737
738         return 0;
739 }
740
741 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
742                              struct ieee80211_vif *vif,
743                              struct ieee80211_sta *sta,
744                              struct ieee80211_key_conf *key)
745 {
746         struct wl1251 *wl = hw->priv;
747         struct wl1251_cmd_set_keys *wl_cmd;
748         const u8 *addr;
749         int ret;
750
751         static const u8 bcast_addr[ETH_ALEN] =
752                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
753
754         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
755
756         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
757         if (!wl_cmd) {
758                 ret = -ENOMEM;
759                 goto out;
760         }
761
762         addr = sta ? sta->addr : bcast_addr;
763
764         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
765         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
766         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
767                      key->alg, key->keyidx, key->keylen, key->flags);
768         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
769
770         if (is_zero_ether_addr(addr)) {
771                 /* We dont support TX only encryption */
772                 ret = -EOPNOTSUPP;
773                 goto out;
774         }
775
776         mutex_lock(&wl->mutex);
777
778         ret = wl1251_ps_elp_wakeup(wl);
779         if (ret < 0)
780                 goto out_unlock;
781
782         switch (cmd) {
783         case SET_KEY:
784                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
785                 break;
786         case DISABLE_KEY:
787                 wl_cmd->key_action = KEY_REMOVE;
788                 break;
789         default:
790                 wl1251_error("Unsupported key cmd 0x%x", cmd);
791                 break;
792         }
793
794         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
795         if (ret < 0) {
796                 wl1251_error("Set KEY type failed");
797                 goto out_sleep;
798         }
799
800         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
801                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
802
803         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
804             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
805                 /*
806                  * We get the key in the following form:
807                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
808                  * but the target is expecting:
809                  * TKIP - RX MIC - TX MIC
810                  */
811                 memcpy(wl_cmd->key, key->key, 16);
812                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
813                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
814
815         } else {
816                 memcpy(wl_cmd->key, key->key, key->keylen);
817         }
818         wl_cmd->key_size = key->keylen;
819
820         wl_cmd->id = key->keyidx;
821         wl_cmd->ssid_profile = 0;
822
823         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
824
825         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
826         if (ret < 0) {
827                 wl1251_warning("could not set keys");
828                 goto out_sleep;
829         }
830
831 out_sleep:
832         wl1251_ps_elp_sleep(wl);
833
834 out_unlock:
835         mutex_unlock(&wl->mutex);
836
837 out:
838         kfree(wl_cmd);
839
840         return ret;
841 }
842
843 static int wl1251_build_basic_rates(char *rates)
844 {
845         u8 index = 0;
846
847         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
848         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
849         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
850         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
851
852         return index;
853 }
854
855 static int wl1251_build_extended_rates(char *rates)
856 {
857         u8 index = 0;
858
859         rates[index++] = IEEE80211_OFDM_RATE_6MB;
860         rates[index++] = IEEE80211_OFDM_RATE_9MB;
861         rates[index++] = IEEE80211_OFDM_RATE_12MB;
862         rates[index++] = IEEE80211_OFDM_RATE_18MB;
863         rates[index++] = IEEE80211_OFDM_RATE_24MB;
864         rates[index++] = IEEE80211_OFDM_RATE_36MB;
865         rates[index++] = IEEE80211_OFDM_RATE_48MB;
866         rates[index++] = IEEE80211_OFDM_RATE_54MB;
867
868         return index;
869 }
870
871
872 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
873 {
874         struct wl12xx_probe_req_template template;
875         struct wl12xx_ie_rates *rates;
876         char *ptr;
877         u16 size;
878
879         ptr = (char *)&template;
880         size = sizeof(struct ieee80211_header);
881
882         memset(template.header.da, 0xff, ETH_ALEN);
883         memset(template.header.bssid, 0xff, ETH_ALEN);
884         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
885         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
886
887         /* IEs */
888         /* SSID */
889         template.ssid.header.id = WLAN_EID_SSID;
890         template.ssid.header.len = ssid_len;
891         if (ssid_len && ssid)
892                 memcpy(template.ssid.ssid, ssid, ssid_len);
893         size += sizeof(struct wl12xx_ie_header) + ssid_len;
894         ptr += size;
895
896         /* Basic Rates */
897         rates = (struct wl12xx_ie_rates *)ptr;
898         rates->header.id = WLAN_EID_SUPP_RATES;
899         rates->header.len = wl1251_build_basic_rates(rates->rates);
900         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
901         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
902
903         /* Extended rates */
904         rates = (struct wl12xx_ie_rates *)ptr;
905         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
906         rates->header.len = wl1251_build_extended_rates(rates->rates);
907         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
908
909         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
910
911         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
912                                       size);
913 }
914
915 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
916                           u8 active_scan, u8 high_prio, u8 num_channels,
917                           u8 probe_requests)
918 {
919         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
920         struct cmd_scan *params = NULL;
921         int i, ret;
922         u16 scan_options = 0;
923
924         if (wl->scanning)
925                 return -EINVAL;
926
927         params = kzalloc(sizeof(*params), GFP_KERNEL);
928         if (!params)
929                 return -ENOMEM;
930
931         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
932         params->params.rx_filter_options =
933                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
934
935         /* High priority scan */
936         if (!active_scan)
937                 scan_options |= SCAN_PASSIVE;
938         if (high_prio)
939                 scan_options |= SCAN_PRIORITY_HIGH;
940         params->params.scan_options = scan_options;
941
942         params->params.num_channels = num_channels;
943         params->params.num_probe_requests = probe_requests;
944         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
945         params->params.tid_trigger = 0;
946
947         for (i = 0; i < num_channels; i++) {
948                 params->channels[i].min_duration = cpu_to_le32(30000);
949                 params->channels[i].max_duration = cpu_to_le32(60000);
950                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
951                 memset(&params->channels[i].bssid_msb, 0xff, 2);
952                 params->channels[i].early_termination = 0;
953                 params->channels[i].tx_power_att = 0;
954                 params->channels[i].channel = i + 1;
955                 memset(params->channels[i].pad, 0, 3);
956         }
957
958         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
959                 memset(&params->channels[i], 0,
960                        sizeof(struct basic_scan_channel_parameters));
961
962         if (len && ssid) {
963                 params->params.ssid_len = len;
964                 memcpy(params->params.ssid, ssid, len);
965         } else {
966                 params->params.ssid_len = 0;
967                 memset(params->params.ssid, 0, 32);
968         }
969
970         ret = wl1251_build_probe_req(wl, ssid, len);
971         if (ret < 0) {
972                 wl1251_error("PROBE request template failed");
973                 goto out;
974         }
975
976         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
977         if (!trigger)
978                 goto out;
979
980         trigger->timeout = 0;
981
982         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
983                               sizeof(*trigger));
984         if (ret < 0) {
985                 wl1251_error("trigger scan to failed for hw scan");
986                 goto out;
987         }
988
989         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
990
991         wl->scanning = true;
992
993         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
994         if (ret < 0)
995                 wl1251_error("SCAN failed");
996
997         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
998
999         if (params->header.status != CMD_STATUS_SUCCESS) {
1000                 wl1251_error("TEST command answer error: %d",
1001                              params->header.status);
1002                 wl->scanning = false;
1003                 ret = -EIO;
1004                 goto out;
1005         }
1006
1007 out:
1008         kfree(params);
1009         return ret;
1010
1011 }
1012
1013 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1014                              struct cfg80211_scan_request *req)
1015 {
1016         struct wl1251 *wl = hw->priv;
1017         int ret;
1018         u8 *ssid = NULL;
1019         size_t ssid_len = 0;
1020
1021         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1022
1023         if (req->n_ssids) {
1024                 ssid = req->ssids[0].ssid;
1025                 ssid_len = req->ssids[0].ssid_len;
1026         }
1027
1028         mutex_lock(&wl->mutex);
1029
1030         ret = wl1251_ps_elp_wakeup(wl);
1031         if (ret < 0)
1032                 goto out;
1033
1034         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1035
1036         wl1251_ps_elp_sleep(wl);
1037
1038 out:
1039         mutex_unlock(&wl->mutex);
1040
1041         return ret;
1042 }
1043
1044 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1045 {
1046         struct wl1251 *wl = hw->priv;
1047         int ret;
1048
1049         mutex_lock(&wl->mutex);
1050
1051         ret = wl1251_ps_elp_wakeup(wl);
1052         if (ret < 0)
1053                 goto out;
1054
1055         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1056         if (ret < 0)
1057                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1058
1059         wl1251_ps_elp_sleep(wl);
1060
1061 out:
1062         mutex_unlock(&wl->mutex);
1063
1064         return ret;
1065 }
1066
1067 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1068                                        struct ieee80211_vif *vif,
1069                                        struct ieee80211_bss_conf *bss_conf,
1070                                        u32 changed)
1071 {
1072         enum wl1251_cmd_ps_mode mode;
1073         struct wl1251 *wl = hw->priv;
1074         struct sk_buff *beacon;
1075         int ret;
1076
1077         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1078
1079         mutex_lock(&wl->mutex);
1080
1081         ret = wl1251_ps_elp_wakeup(wl);
1082         if (ret < 0)
1083                 goto out;
1084
1085         if (changed & BSS_CHANGED_ASSOC) {
1086                 if (bss_conf->assoc) {
1087                         wl->beacon_int = bss_conf->beacon_int;
1088                         wl->dtim_period = bss_conf->dtim_period;
1089
1090                         /* FIXME: call join */
1091
1092                         wl->aid = bss_conf->aid;
1093
1094                         ret = wl1251_build_ps_poll(wl, wl->aid);
1095                         if (ret < 0)
1096                                 goto out_sleep;
1097
1098                         ret = wl1251_acx_aid(wl, wl->aid);
1099                         if (ret < 0)
1100                                 goto out_sleep;
1101
1102                         /* If we want to go in PSM but we're not there yet */
1103                         if (wl->psm_requested && !wl->psm) {
1104                                 mode = STATION_POWER_SAVE_MODE;
1105                                 ret = wl1251_ps_set_mode(wl, mode);
1106                                 if (ret < 0)
1107                                         goto out_sleep;
1108                         }
1109                 } else {
1110                         /* use defaults when not associated */
1111                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1112                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1113                 }
1114         }
1115         if (changed & BSS_CHANGED_ERP_SLOT) {
1116                 if (bss_conf->use_short_slot)
1117                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1118                 else
1119                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1120                 if (ret < 0) {
1121                         wl1251_warning("Set slot time failed %d", ret);
1122                         goto out_sleep;
1123                 }
1124         }
1125
1126         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1127                 if (bss_conf->use_short_preamble)
1128                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1129                 else
1130                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1131         }
1132
1133         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1134                 if (bss_conf->use_cts_prot)
1135                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1136                 else
1137                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1138                 if (ret < 0) {
1139                         wl1251_warning("Set ctsprotect failed %d", ret);
1140                         goto out;
1141                 }
1142         }
1143
1144         if (changed & BSS_CHANGED_BSSID) {
1145                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1146
1147                 ret = wl1251_build_null_data(wl);
1148                 if (ret < 0)
1149                         goto out;
1150
1151                 if (wl->bss_type != BSS_TYPE_IBSS) {
1152                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1153                                           wl->beacon_int, wl->dtim_period);
1154                         if (ret < 0)
1155                                 goto out_sleep;
1156                         wl1251_warning("Set ctsprotect failed %d", ret);
1157                         goto out_sleep;
1158                 }
1159         }
1160
1161         if (changed & BSS_CHANGED_BEACON) {
1162                 beacon = ieee80211_beacon_get(hw, vif);
1163                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1164                                               beacon->len);
1165
1166                 if (ret < 0) {
1167                         dev_kfree_skb(beacon);
1168                         goto out;
1169                 }
1170
1171                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1172                                               beacon->len);
1173
1174                 dev_kfree_skb(beacon);
1175
1176                 if (ret < 0)
1177                         goto out;
1178
1179                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1180                                   wl->channel, wl->dtim_period);
1181
1182                 if (ret < 0)
1183                         goto out;
1184         }
1185
1186 out_sleep:
1187         wl1251_ps_elp_sleep(wl);
1188
1189 out:
1190         mutex_unlock(&wl->mutex);
1191 }
1192
1193
1194 /* can't be const, mac80211 writes to this */
1195 static struct ieee80211_rate wl1251_rates[] = {
1196         { .bitrate = 10,
1197           .hw_value = 0x1,
1198           .hw_value_short = 0x1, },
1199         { .bitrate = 20,
1200           .hw_value = 0x2,
1201           .hw_value_short = 0x2,
1202           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1203         { .bitrate = 55,
1204           .hw_value = 0x4,
1205           .hw_value_short = 0x4,
1206           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1207         { .bitrate = 110,
1208           .hw_value = 0x20,
1209           .hw_value_short = 0x20,
1210           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1211         { .bitrate = 60,
1212           .hw_value = 0x8,
1213           .hw_value_short = 0x8, },
1214         { .bitrate = 90,
1215           .hw_value = 0x10,
1216           .hw_value_short = 0x10, },
1217         { .bitrate = 120,
1218           .hw_value = 0x40,
1219           .hw_value_short = 0x40, },
1220         { .bitrate = 180,
1221           .hw_value = 0x80,
1222           .hw_value_short = 0x80, },
1223         { .bitrate = 240,
1224           .hw_value = 0x200,
1225           .hw_value_short = 0x200, },
1226         { .bitrate = 360,
1227          .hw_value = 0x400,
1228          .hw_value_short = 0x400, },
1229         { .bitrate = 480,
1230           .hw_value = 0x800,
1231           .hw_value_short = 0x800, },
1232         { .bitrate = 540,
1233           .hw_value = 0x1000,
1234           .hw_value_short = 0x1000, },
1235 };
1236
1237 /* can't be const, mac80211 writes to this */
1238 static struct ieee80211_channel wl1251_channels[] = {
1239         { .hw_value = 1, .center_freq = 2412},
1240         { .hw_value = 2, .center_freq = 2417},
1241         { .hw_value = 3, .center_freq = 2422},
1242         { .hw_value = 4, .center_freq = 2427},
1243         { .hw_value = 5, .center_freq = 2432},
1244         { .hw_value = 6, .center_freq = 2437},
1245         { .hw_value = 7, .center_freq = 2442},
1246         { .hw_value = 8, .center_freq = 2447},
1247         { .hw_value = 9, .center_freq = 2452},
1248         { .hw_value = 10, .center_freq = 2457},
1249         { .hw_value = 11, .center_freq = 2462},
1250         { .hw_value = 12, .center_freq = 2467},
1251         { .hw_value = 13, .center_freq = 2472},
1252 };
1253
1254 /* can't be const, mac80211 writes to this */
1255 static struct ieee80211_supported_band wl1251_band_2ghz = {
1256         .channels = wl1251_channels,
1257         .n_channels = ARRAY_SIZE(wl1251_channels),
1258         .bitrates = wl1251_rates,
1259         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1260 };
1261
1262 static const struct ieee80211_ops wl1251_ops = {
1263         .start = wl1251_op_start,
1264         .stop = wl1251_op_stop,
1265         .add_interface = wl1251_op_add_interface,
1266         .remove_interface = wl1251_op_remove_interface,
1267         .config = wl1251_op_config,
1268         .configure_filter = wl1251_op_configure_filter,
1269         .tx = wl1251_op_tx,
1270         .set_key = wl1251_op_set_key,
1271         .hw_scan = wl1251_op_hw_scan,
1272         .bss_info_changed = wl1251_op_bss_info_changed,
1273         .set_rts_threshold = wl1251_op_set_rts_threshold,
1274 };
1275
1276 static int wl1251_register_hw(struct wl1251 *wl)
1277 {
1278         int ret;
1279
1280         if (wl->mac80211_registered)
1281                 return 0;
1282
1283         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1284
1285         ret = ieee80211_register_hw(wl->hw);
1286         if (ret < 0) {
1287                 wl1251_error("unable to register mac80211 hw: %d", ret);
1288                 return ret;
1289         }
1290
1291         wl->mac80211_registered = true;
1292
1293         wl1251_notice("loaded");
1294
1295         return 0;
1296 }
1297
1298 int wl1251_init_ieee80211(struct wl1251 *wl)
1299 {
1300         int ret;
1301
1302         /* The tx descriptor buffer and the TKIP space */
1303         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1304                 + WL1251_TKIP_IV_SPACE;
1305
1306         /* unit us */
1307         /* FIXME: find a proper value */
1308         wl->hw->channel_change_time = 10000;
1309
1310         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1311                 IEEE80211_HW_NOISE_DBM;
1312
1313         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1314         wl->hw->wiphy->max_scan_ssids = 1;
1315         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1316
1317         ret = wl1251_register_hw(wl);
1318         if (ret)
1319                 goto out;
1320
1321         wl1251_debugfs_init(wl);
1322         wl1251_notice("initialized");
1323
1324         ret = 0;
1325
1326 out:
1327         return ret;
1328 }
1329 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1330
1331 struct ieee80211_hw *wl1251_alloc_hw(void)
1332 {
1333         struct ieee80211_hw *hw;
1334         struct wl1251 *wl;
1335         int i;
1336         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1337
1338         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1339         if (!hw) {
1340                 wl1251_error("could not alloc ieee80211_hw");
1341                 return ERR_PTR(-ENOMEM);
1342         }
1343
1344         wl = hw->priv;
1345         memset(wl, 0, sizeof(*wl));
1346
1347         wl->hw = hw;
1348
1349         wl->data_in_count = 0;
1350
1351         skb_queue_head_init(&wl->tx_queue);
1352
1353         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1354         wl->channel = WL1251_DEFAULT_CHANNEL;
1355         wl->scanning = false;
1356         wl->default_key = 0;
1357         wl->listen_int = 1;
1358         wl->rx_counter = 0;
1359         wl->rx_handled = 0;
1360         wl->rx_current_buffer = 0;
1361         wl->rx_last_id = 0;
1362         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1363         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1364         wl->elp = false;
1365         wl->psm = 0;
1366         wl->psm_requested = false;
1367         wl->tx_queue_stopped = false;
1368         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1369         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1370         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1371
1372         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1373                 wl->tx_frames[i] = NULL;
1374
1375         wl->next_tx_complete = 0;
1376
1377         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1378         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1379
1380         /*
1381          * In case our MAC address is not correctly set,
1382          * we use a random but Nokia MAC.
1383          */
1384         memcpy(wl->mac_addr, nokia_oui, 3);
1385         get_random_bytes(wl->mac_addr + 3, 3);
1386
1387         wl->state = WL1251_STATE_OFF;
1388         mutex_init(&wl->mutex);
1389
1390         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1391         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1392
1393         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1394         if (!wl->rx_descriptor) {
1395                 wl1251_error("could not allocate memory for rx descriptor");
1396                 ieee80211_free_hw(hw);
1397                 return ERR_PTR(-ENOMEM);
1398         }
1399
1400         return hw;
1401 }
1402 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1403
1404 int wl1251_free_hw(struct wl1251 *wl)
1405 {
1406         ieee80211_unregister_hw(wl->hw);
1407
1408         wl1251_debugfs_exit(wl);
1409
1410         kfree(wl->target_mem_map);
1411         kfree(wl->data_path);
1412         kfree(wl->fw);
1413         wl->fw = NULL;
1414         kfree(wl->nvs);
1415         wl->nvs = NULL;
1416
1417         kfree(wl->rx_descriptor);
1418         wl->rx_descriptor = NULL;
1419
1420         ieee80211_free_hw(wl->hw);
1421
1422         return 0;
1423 }
1424 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1425
1426 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1427 MODULE_LICENSE("GPL");
1428 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1429 MODULE_ALIAS("spi:wl12xx");