wl1251: fix bssid handling
[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 #include <linux/vmalloc.h>
32
33 #include "wl1251.h"
34 #include "wl12xx_80211.h"
35 #include "wl1251_reg.h"
36 #include "wl1251_io.h"
37 #include "wl1251_cmd.h"
38 #include "wl1251_event.h"
39 #include "wl1251_tx.h"
40 #include "wl1251_rx.h"
41 #include "wl1251_ps.h"
42 #include "wl1251_init.h"
43 #include "wl1251_debugfs.h"
44 #include "wl1251_boot.h"
45
46 void wl1251_enable_interrupts(struct wl1251 *wl)
47 {
48         wl->if_ops->enable_irq(wl);
49 }
50
51 void wl1251_disable_interrupts(struct wl1251 *wl)
52 {
53         wl->if_ops->disable_irq(wl);
54 }
55
56 static void wl1251_power_off(struct wl1251 *wl)
57 {
58         wl->set_power(false);
59 }
60
61 static void wl1251_power_on(struct wl1251 *wl)
62 {
63         wl->set_power(true);
64 }
65
66 static int wl1251_fetch_firmware(struct wl1251 *wl)
67 {
68         const struct firmware *fw;
69         struct device *dev = wiphy_dev(wl->hw->wiphy);
70         int ret;
71
72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
73
74         if (ret < 0) {
75                 wl1251_error("could not get firmware: %d", ret);
76                 return ret;
77         }
78
79         if (fw->size % 4) {
80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
81                              fw->size);
82                 ret = -EILSEQ;
83                 goto out;
84         }
85
86         wl->fw_len = fw->size;
87         wl->fw = vmalloc(wl->fw_len);
88
89         if (!wl->fw) {
90                 wl1251_error("could not allocate memory for the firmware");
91                 ret = -ENOMEM;
92                 goto out;
93         }
94
95         memcpy(wl->fw, fw->data, wl->fw_len);
96
97         ret = 0;
98
99 out:
100         release_firmware(fw);
101
102         return ret;
103 }
104
105 static int wl1251_fetch_nvs(struct wl1251 *wl)
106 {
107         const struct firmware *fw;
108         struct device *dev = wiphy_dev(wl->hw->wiphy);
109         int ret;
110
111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
112
113         if (ret < 0) {
114                 wl1251_error("could not get nvs file: %d", ret);
115                 return ret;
116         }
117
118         if (fw->size % 4) {
119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
120                              fw->size);
121                 ret = -EILSEQ;
122                 goto out;
123         }
124
125         wl->nvs_len = fw->size;
126         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
127
128         if (!wl->nvs) {
129                 wl1251_error("could not allocate memory for the nvs file");
130                 ret = -ENOMEM;
131                 goto out;
132         }
133
134         memcpy(wl->nvs, fw->data, wl->nvs_len);
135
136         ret = 0;
137
138 out:
139         release_firmware(fw);
140
141         return ret;
142 }
143
144 static void wl1251_fw_wakeup(struct wl1251 *wl)
145 {
146         u32 elp_reg;
147
148         elp_reg = ELPCTRL_WAKE_UP;
149         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
150         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
151
152         if (!(elp_reg & ELPCTRL_WLAN_READY))
153                 wl1251_warning("WLAN not ready");
154 }
155
156 static int wl1251_chip_wakeup(struct wl1251 *wl)
157 {
158         int ret = 0;
159
160         wl1251_power_on(wl);
161         msleep(WL1251_POWER_ON_SLEEP);
162         wl->if_ops->reset(wl);
163
164         /* We don't need a real memory partition here, because we only want
165          * to use the registers at this point. */
166         wl1251_set_partition(wl,
167                              0x00000000,
168                              0x00000000,
169                              REGISTERS_BASE,
170                              REGISTERS_DOWN_SIZE);
171
172         /* ELP module wake up */
173         wl1251_fw_wakeup(wl);
174
175         /* whal_FwCtrl_BootSm() */
176
177         /* 0. read chip id from CHIP_ID */
178         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
179
180         /* 1. check if chip id is valid */
181
182         switch (wl->chip_id) {
183         case CHIP_ID_1251_PG12:
184                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
185                              wl->chip_id);
186                 break;
187         case CHIP_ID_1251_PG11:
188                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
189                              wl->chip_id);
190                 break;
191         case CHIP_ID_1251_PG10:
192         default:
193                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
194                 ret = -ENODEV;
195                 goto out;
196         }
197
198         if (wl->fw == NULL) {
199                 ret = wl1251_fetch_firmware(wl);
200                 if (ret < 0)
201                         goto out;
202         }
203
204         /* No NVS from netlink, try to get it from the filesystem */
205         if (wl->nvs == NULL) {
206                 ret = wl1251_fetch_nvs(wl);
207                 if (ret < 0)
208                         goto out;
209         }
210
211 out:
212         return ret;
213 }
214
215 #define WL1251_IRQ_LOOP_COUNT 10
216 static void wl1251_irq_work(struct work_struct *work)
217 {
218         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
219         struct wl1251 *wl =
220                 container_of(work, struct wl1251, irq_work);
221         int ret;
222
223         mutex_lock(&wl->mutex);
224
225         wl1251_debug(DEBUG_IRQ, "IRQ work");
226
227         if (wl->state == WL1251_STATE_OFF)
228                 goto out;
229
230         ret = wl1251_ps_elp_wakeup(wl);
231         if (ret < 0)
232                 goto out;
233
234         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
235
236         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
237         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
238
239         do {
240                 if (wl->data_path) {
241                         wl->rx_counter = wl1251_mem_read32(
242                                 wl, wl->data_path->rx_control_addr);
243
244                         /* We handle a frmware bug here */
245                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
246                         case 0:
247                                 wl1251_debug(DEBUG_IRQ,
248                                              "RX: FW and host in sync");
249                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
250                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
251                                 break;
252                         case 1:
253                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
254                                 intr |= WL1251_ACX_INTR_RX0_DATA;
255                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
256                                 break;
257                         case 2:
258                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
259                                 intr |= WL1251_ACX_INTR_RX0_DATA;
260                                 intr |= WL1251_ACX_INTR_RX1_DATA;
261                                 break;
262                         default:
263                                 wl1251_warning(
264                                         "RX: FW and host out of sync: %d",
265                                         wl->rx_counter - wl->rx_handled);
266                                 break;
267                         }
268
269                         wl->rx_handled = wl->rx_counter;
270
271                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
272                                      wl->rx_counter);
273                 }
274
275                 intr &= wl->intr_mask;
276
277                 if (intr == 0) {
278                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
279                         goto out_sleep;
280                 }
281
282                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
283                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
284                         wl1251_rx(wl);
285                 }
286
287                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
288                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
289                         wl1251_rx(wl);
290                 }
291
292                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
293                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
294                         wl1251_tx_complete(wl);
295                 }
296
297                 if (intr & (WL1251_ACX_INTR_EVENT_A |
298                             WL1251_ACX_INTR_EVENT_B)) {
299                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
300                                      intr);
301                         if (intr & WL1251_ACX_INTR_EVENT_A)
302                                 wl1251_event_handle(wl, 0);
303                         else
304                                 wl1251_event_handle(wl, 1);
305                 }
306
307                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
308                         wl1251_debug(DEBUG_IRQ,
309                                      "WL1251_ACX_INTR_INIT_COMPLETE");
310
311                 if (--ctr == 0)
312                         break;
313
314                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
315         } while (intr);
316
317 out_sleep:
318         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
319         wl1251_ps_elp_sleep(wl);
320
321 out:
322         mutex_unlock(&wl->mutex);
323 }
324
325 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
326                        u16 beacon_interval, u8 dtim_period)
327 {
328         int ret;
329
330         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
331                                      DEFAULT_HW_GEN_MODULATION_TYPE,
332                                      wl->tx_mgmt_frm_rate,
333                                      wl->tx_mgmt_frm_mod);
334         if (ret < 0)
335                 goto out;
336
337
338         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
339                               dtim_period);
340         if (ret < 0)
341                 goto out;
342
343         /*
344          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
345          * locking we just sleep instead, for now
346          */
347         msleep(10);
348
349 out:
350         return ret;
351 }
352
353 static void wl1251_filter_work(struct work_struct *work)
354 {
355         struct wl1251 *wl =
356                 container_of(work, struct wl1251, filter_work);
357         int ret;
358
359         mutex_lock(&wl->mutex);
360
361         if (wl->state == WL1251_STATE_OFF)
362                 goto out;
363
364         ret = wl1251_ps_elp_wakeup(wl);
365         if (ret < 0)
366                 goto out;
367
368         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
369                           wl->dtim_period);
370         if (ret < 0)
371                 goto out_sleep;
372
373 out_sleep:
374         wl1251_ps_elp_sleep(wl);
375
376 out:
377         mutex_unlock(&wl->mutex);
378 }
379
380 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
381 {
382         struct wl1251 *wl = hw->priv;
383
384         skb_queue_tail(&wl->tx_queue, skb);
385
386         /*
387          * The chip specific setup must run before the first TX packet -
388          * before that, the tx_work will not be initialized!
389          */
390
391         ieee80211_queue_work(wl->hw, &wl->tx_work);
392
393         /*
394          * The workqueue is slow to process the tx_queue and we need stop
395          * the queue here, otherwise the queue will get too long.
396          */
397         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
398                 ieee80211_stop_queues(wl->hw);
399
400                 /*
401                  * FIXME: this is racy, the variable is not properly
402                  * protected. Maybe fix this by removing the stupid
403                  * variable altogether and checking the real queue state?
404                  */
405                 wl->tx_queue_stopped = true;
406         }
407
408         return NETDEV_TX_OK;
409 }
410
411 static int wl1251_op_start(struct ieee80211_hw *hw)
412 {
413         struct wl1251 *wl = hw->priv;
414         int ret = 0;
415
416         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
417
418         mutex_lock(&wl->mutex);
419
420         if (wl->state != WL1251_STATE_OFF) {
421                 wl1251_error("cannot start because not in off state: %d",
422                              wl->state);
423                 ret = -EBUSY;
424                 goto out;
425         }
426
427         ret = wl1251_chip_wakeup(wl);
428         if (ret < 0)
429                 goto out;
430
431         ret = wl1251_boot(wl);
432         if (ret < 0)
433                 goto out;
434
435         ret = wl1251_hw_init(wl);
436         if (ret < 0)
437                 goto out;
438
439         ret = wl1251_acx_station_id(wl);
440         if (ret < 0)
441                 goto out;
442
443         wl->state = WL1251_STATE_ON;
444
445         wl1251_info("firmware booted (%s)", wl->fw_ver);
446
447 out:
448         if (ret < 0)
449                 wl1251_power_off(wl);
450
451         mutex_unlock(&wl->mutex);
452
453         return ret;
454 }
455
456 static void wl1251_op_stop(struct ieee80211_hw *hw)
457 {
458         struct wl1251 *wl = hw->priv;
459
460         wl1251_info("down");
461
462         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
463
464         mutex_lock(&wl->mutex);
465
466         WARN_ON(wl->state != WL1251_STATE_ON);
467
468         if (wl->scanning) {
469                 mutex_unlock(&wl->mutex);
470                 ieee80211_scan_completed(wl->hw, true);
471                 mutex_lock(&wl->mutex);
472                 wl->scanning = false;
473         }
474
475         wl->state = WL1251_STATE_OFF;
476
477         wl1251_disable_interrupts(wl);
478
479         mutex_unlock(&wl->mutex);
480
481         cancel_work_sync(&wl->irq_work);
482         cancel_work_sync(&wl->tx_work);
483         cancel_work_sync(&wl->filter_work);
484
485         mutex_lock(&wl->mutex);
486
487         /* let's notify MAC80211 about the remaining pending TX frames */
488         wl1251_tx_flush(wl);
489         wl1251_power_off(wl);
490
491         memset(wl->bssid, 0, ETH_ALEN);
492         wl->listen_int = 1;
493         wl->bss_type = MAX_BSS_TYPE;
494
495         wl->data_in_count = 0;
496         wl->rx_counter = 0;
497         wl->rx_handled = 0;
498         wl->rx_current_buffer = 0;
499         wl->rx_last_id = 0;
500         wl->next_tx_complete = 0;
501         wl->elp = false;
502         wl->psm = 0;
503         wl->tx_queue_stopped = false;
504         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
505         wl->channel = WL1251_DEFAULT_CHANNEL;
506
507         wl1251_debugfs_reset(wl);
508
509         mutex_unlock(&wl->mutex);
510 }
511
512 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
513                                    struct ieee80211_if_init_conf *conf)
514 {
515         struct wl1251 *wl = hw->priv;
516         int ret = 0;
517
518         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
519                      conf->type, conf->mac_addr);
520
521         mutex_lock(&wl->mutex);
522         if (wl->vif) {
523                 ret = -EBUSY;
524                 goto out;
525         }
526
527         wl->vif = conf->vif;
528
529         switch (conf->type) {
530         case NL80211_IFTYPE_STATION:
531                 wl->bss_type = BSS_TYPE_STA_BSS;
532                 break;
533         case NL80211_IFTYPE_ADHOC:
534                 wl->bss_type = BSS_TYPE_IBSS;
535                 break;
536         default:
537                 ret = -EOPNOTSUPP;
538                 goto out;
539         }
540
541         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
542                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
543                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
544                 ret = wl1251_acx_station_id(wl);
545                 if (ret < 0)
546                         goto out;
547         }
548
549 out:
550         mutex_unlock(&wl->mutex);
551         return ret;
552 }
553
554 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
555                                          struct ieee80211_if_init_conf *conf)
556 {
557         struct wl1251 *wl = hw->priv;
558
559         mutex_lock(&wl->mutex);
560         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
561         wl->vif = NULL;
562         mutex_unlock(&wl->mutex);
563 }
564
565 static int wl1251_build_null_data(struct wl1251 *wl)
566 {
567         struct wl12xx_null_data_template template;
568
569         if (!is_zero_ether_addr(wl->bssid)) {
570                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
571                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
572         } else {
573                 memset(template.header.da, 0xff, ETH_ALEN);
574                 memset(template.header.bssid, 0xff, ETH_ALEN);
575         }
576
577         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
578         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
579                                                 IEEE80211_STYPE_NULLFUNC |
580                                                 IEEE80211_FCTL_TODS);
581
582         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
583                                        sizeof(template));
584
585 }
586
587 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
588 {
589         struct wl12xx_ps_poll_template template;
590
591         memcpy(template.bssid, wl->bssid, ETH_ALEN);
592         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
593
594         /* aid in PS-Poll has its two MSBs each set to 1 */
595         template.aid = cpu_to_le16(1 << 15 | 1 << 14 | aid);
596
597         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
598
599         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
600                                        sizeof(template));
601
602 }
603
604 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
605 {
606         struct wl1251 *wl = hw->priv;
607         struct ieee80211_conf *conf = &hw->conf;
608         int channel, ret = 0;
609
610         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
611
612         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
613                      channel,
614                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
615                      conf->power_level);
616
617         mutex_lock(&wl->mutex);
618
619         ret = wl1251_ps_elp_wakeup(wl);
620         if (ret < 0)
621                 goto out;
622
623         if (channel != wl->channel) {
624                 wl->channel = channel;
625
626                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
627                                   wl->beacon_int, wl->dtim_period);
628                 if (ret < 0)
629                         goto out_sleep;
630         }
631
632         ret = wl1251_build_null_data(wl);
633         if (ret < 0)
634                 goto out_sleep;
635
636         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
637                 wl1251_debug(DEBUG_PSM, "psm enabled");
638
639                 wl->psm_requested = true;
640
641                 /*
642                  * We enter PSM only if we're already associated.
643                  * If we're not, we'll enter it when joining an SSID,
644                  * through the bss_info_changed() hook.
645                  */
646                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
647         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
648                    wl->psm_requested) {
649                 wl1251_debug(DEBUG_PSM, "psm disabled");
650
651                 wl->psm_requested = false;
652
653                 if (wl->psm)
654                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
655         }
656
657         if (conf->power_level != wl->power_level) {
658                 ret = wl1251_acx_tx_power(wl, conf->power_level);
659                 if (ret < 0)
660                         goto out;
661
662                 wl->power_level = conf->power_level;
663         }
664
665 out_sleep:
666         wl1251_ps_elp_sleep(wl);
667
668 out:
669         mutex_unlock(&wl->mutex);
670
671         return ret;
672 }
673
674 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
675                                   FIF_ALLMULTI | \
676                                   FIF_FCSFAIL | \
677                                   FIF_BCN_PRBRESP_PROMISC | \
678                                   FIF_CONTROL | \
679                                   FIF_OTHER_BSS)
680
681 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
682                                        unsigned int changed,
683                                        unsigned int *total,u64 multicast)
684 {
685         struct wl1251 *wl = hw->priv;
686
687         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
688
689         *total &= WL1251_SUPPORTED_FILTERS;
690         changed &= WL1251_SUPPORTED_FILTERS;
691
692         if (changed == 0)
693                 /* no filters which we support changed */
694                 return;
695
696         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
697
698         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
699         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
700
701         if (*total & FIF_PROMISC_IN_BSS) {
702                 wl->rx_config |= CFG_BSSID_FILTER_EN;
703                 wl->rx_config |= CFG_RX_ALL_GOOD;
704         }
705         if (*total & FIF_ALLMULTI)
706                 /*
707                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
708                  * all multicast frames
709                  */
710                 wl->rx_config &= ~CFG_MC_FILTER_EN;
711         if (*total & FIF_FCSFAIL)
712                 wl->rx_filter |= CFG_RX_FCS_ERROR;
713         if (*total & FIF_BCN_PRBRESP_PROMISC) {
714                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
715                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
716         }
717         if (*total & FIF_CONTROL)
718                 wl->rx_filter |= CFG_RX_CTL_EN;
719         if (*total & FIF_OTHER_BSS)
720                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
721
722         /*
723          * FIXME: workqueues need to be properly cancelled on stop(), for
724          * now let's just disable changing the filter settings. They will
725          * be updated any on config().
726          */
727         /* schedule_work(&wl->filter_work); */
728 }
729
730 /* HW encryption */
731 static int wl1251_set_key_type(struct wl1251 *wl,
732                                struct wl1251_cmd_set_keys *key,
733                                enum set_key_cmd cmd,
734                                struct ieee80211_key_conf *mac80211_key,
735                                const u8 *addr)
736 {
737         switch (mac80211_key->alg) {
738         case ALG_WEP:
739                 if (is_broadcast_ether_addr(addr))
740                         key->key_type = KEY_WEP_DEFAULT;
741                 else
742                         key->key_type = KEY_WEP_ADDR;
743
744                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
745                 break;
746         case ALG_TKIP:
747                 if (is_broadcast_ether_addr(addr))
748                         key->key_type = KEY_TKIP_MIC_GROUP;
749                 else
750                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
751
752                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
753                 break;
754         case ALG_CCMP:
755                 if (is_broadcast_ether_addr(addr))
756                         key->key_type = KEY_AES_GROUP;
757                 else
758                         key->key_type = KEY_AES_PAIRWISE;
759                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
760                 break;
761         default:
762                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
763                 return -EOPNOTSUPP;
764         }
765
766         return 0;
767 }
768
769 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
770                              struct ieee80211_vif *vif,
771                              struct ieee80211_sta *sta,
772                              struct ieee80211_key_conf *key)
773 {
774         struct wl1251 *wl = hw->priv;
775         struct wl1251_cmd_set_keys *wl_cmd;
776         const u8 *addr;
777         int ret;
778
779         static const u8 bcast_addr[ETH_ALEN] =
780                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
781
782         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
783
784         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
785         if (!wl_cmd) {
786                 ret = -ENOMEM;
787                 goto out;
788         }
789
790         addr = sta ? sta->addr : bcast_addr;
791
792         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
793         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
794         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
795                      key->alg, key->keyidx, key->keylen, key->flags);
796         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
797
798         if (is_zero_ether_addr(addr)) {
799                 /* We dont support TX only encryption */
800                 ret = -EOPNOTSUPP;
801                 goto out;
802         }
803
804         mutex_lock(&wl->mutex);
805
806         ret = wl1251_ps_elp_wakeup(wl);
807         if (ret < 0)
808                 goto out_unlock;
809
810         switch (cmd) {
811         case SET_KEY:
812                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
813                 break;
814         case DISABLE_KEY:
815                 wl_cmd->key_action = KEY_REMOVE;
816                 break;
817         default:
818                 wl1251_error("Unsupported key cmd 0x%x", cmd);
819                 break;
820         }
821
822         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
823         if (ret < 0) {
824                 wl1251_error("Set KEY type failed");
825                 goto out_sleep;
826         }
827
828         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
829                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
830
831         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
832             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
833                 /*
834                  * We get the key in the following form:
835                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
836                  * but the target is expecting:
837                  * TKIP - RX MIC - TX MIC
838                  */
839                 memcpy(wl_cmd->key, key->key, 16);
840                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
841                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
842
843         } else {
844                 memcpy(wl_cmd->key, key->key, key->keylen);
845         }
846         wl_cmd->key_size = key->keylen;
847
848         wl_cmd->id = key->keyidx;
849         wl_cmd->ssid_profile = 0;
850
851         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
852
853         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
854         if (ret < 0) {
855                 wl1251_warning("could not set keys");
856                 goto out_sleep;
857         }
858
859 out_sleep:
860         wl1251_ps_elp_sleep(wl);
861
862 out_unlock:
863         mutex_unlock(&wl->mutex);
864
865 out:
866         kfree(wl_cmd);
867
868         return ret;
869 }
870
871 static int wl1251_build_basic_rates(char *rates)
872 {
873         u8 index = 0;
874
875         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
876         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
877         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
878         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
879
880         return index;
881 }
882
883 static int wl1251_build_extended_rates(char *rates)
884 {
885         u8 index = 0;
886
887         rates[index++] = IEEE80211_OFDM_RATE_6MB;
888         rates[index++] = IEEE80211_OFDM_RATE_9MB;
889         rates[index++] = IEEE80211_OFDM_RATE_12MB;
890         rates[index++] = IEEE80211_OFDM_RATE_18MB;
891         rates[index++] = IEEE80211_OFDM_RATE_24MB;
892         rates[index++] = IEEE80211_OFDM_RATE_36MB;
893         rates[index++] = IEEE80211_OFDM_RATE_48MB;
894         rates[index++] = IEEE80211_OFDM_RATE_54MB;
895
896         return index;
897 }
898
899
900 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
901 {
902         struct wl12xx_probe_req_template template;
903         struct wl12xx_ie_rates *rates;
904         char *ptr;
905         u16 size;
906
907         ptr = (char *)&template;
908         size = sizeof(struct ieee80211_header);
909
910         memset(template.header.da, 0xff, ETH_ALEN);
911         memset(template.header.bssid, 0xff, ETH_ALEN);
912         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
913         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
914
915         /* IEs */
916         /* SSID */
917         template.ssid.header.id = WLAN_EID_SSID;
918         template.ssid.header.len = ssid_len;
919         if (ssid_len && ssid)
920                 memcpy(template.ssid.ssid, ssid, ssid_len);
921         size += sizeof(struct wl12xx_ie_header) + ssid_len;
922         ptr += size;
923
924         /* Basic Rates */
925         rates = (struct wl12xx_ie_rates *)ptr;
926         rates->header.id = WLAN_EID_SUPP_RATES;
927         rates->header.len = wl1251_build_basic_rates(rates->rates);
928         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
929         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
930
931         /* Extended rates */
932         rates = (struct wl12xx_ie_rates *)ptr;
933         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
934         rates->header.len = wl1251_build_extended_rates(rates->rates);
935         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
936
937         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
938
939         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
940                                       size);
941 }
942
943 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
944                           u8 active_scan, u8 high_prio, u8 num_channels,
945                           u8 probe_requests)
946 {
947         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
948         struct cmd_scan *params = NULL;
949         int i, ret;
950         u16 scan_options = 0;
951
952         if (wl->scanning)
953                 return -EINVAL;
954
955         params = kzalloc(sizeof(*params), GFP_KERNEL);
956         if (!params)
957                 return -ENOMEM;
958
959         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
960         params->params.rx_filter_options =
961                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
962
963         /* High priority scan */
964         if (!active_scan)
965                 scan_options |= SCAN_PASSIVE;
966         if (high_prio)
967                 scan_options |= SCAN_PRIORITY_HIGH;
968         params->params.scan_options = scan_options;
969
970         params->params.num_channels = num_channels;
971         params->params.num_probe_requests = probe_requests;
972         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
973         params->params.tid_trigger = 0;
974
975         for (i = 0; i < num_channels; i++) {
976                 params->channels[i].min_duration = cpu_to_le32(30000);
977                 params->channels[i].max_duration = cpu_to_le32(60000);
978                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
979                 memset(&params->channels[i].bssid_msb, 0xff, 2);
980                 params->channels[i].early_termination = 0;
981                 params->channels[i].tx_power_att = 0;
982                 params->channels[i].channel = i + 1;
983                 memset(params->channels[i].pad, 0, 3);
984         }
985
986         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
987                 memset(&params->channels[i], 0,
988                        sizeof(struct basic_scan_channel_parameters));
989
990         if (len && ssid) {
991                 params->params.ssid_len = len;
992                 memcpy(params->params.ssid, ssid, len);
993         } else {
994                 params->params.ssid_len = 0;
995                 memset(params->params.ssid, 0, 32);
996         }
997
998         ret = wl1251_build_probe_req(wl, ssid, len);
999         if (ret < 0) {
1000                 wl1251_error("PROBE request template failed");
1001                 goto out;
1002         }
1003
1004         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
1005         if (!trigger)
1006                 goto out;
1007
1008         trigger->timeout = 0;
1009
1010         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
1011                               sizeof(*trigger));
1012         if (ret < 0) {
1013                 wl1251_error("trigger scan to failed for hw scan");
1014                 goto out;
1015         }
1016
1017         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
1018
1019         wl->scanning = true;
1020
1021         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
1022         if (ret < 0)
1023                 wl1251_error("SCAN failed");
1024
1025         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
1026
1027         if (params->header.status != CMD_STATUS_SUCCESS) {
1028                 wl1251_error("TEST command answer error: %d",
1029                              params->header.status);
1030                 wl->scanning = false;
1031                 ret = -EIO;
1032                 goto out;
1033         }
1034
1035 out:
1036         kfree(params);
1037         return ret;
1038
1039 }
1040
1041 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1042                              struct cfg80211_scan_request *req)
1043 {
1044         struct wl1251 *wl = hw->priv;
1045         int ret;
1046         u8 *ssid = NULL;
1047         size_t ssid_len = 0;
1048
1049         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1050
1051         if (req->n_ssids) {
1052                 ssid = req->ssids[0].ssid;
1053                 ssid_len = req->ssids[0].ssid_len;
1054         }
1055
1056         mutex_lock(&wl->mutex);
1057
1058         ret = wl1251_ps_elp_wakeup(wl);
1059         if (ret < 0)
1060                 goto out;
1061
1062         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
1063
1064         wl1251_ps_elp_sleep(wl);
1065
1066 out:
1067         mutex_unlock(&wl->mutex);
1068
1069         return ret;
1070 }
1071
1072 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1073 {
1074         struct wl1251 *wl = hw->priv;
1075         int ret;
1076
1077         mutex_lock(&wl->mutex);
1078
1079         ret = wl1251_ps_elp_wakeup(wl);
1080         if (ret < 0)
1081                 goto out;
1082
1083         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1084         if (ret < 0)
1085                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1086
1087         wl1251_ps_elp_sleep(wl);
1088
1089 out:
1090         mutex_unlock(&wl->mutex);
1091
1092         return ret;
1093 }
1094
1095 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1096                                        struct ieee80211_vif *vif,
1097                                        struct ieee80211_bss_conf *bss_conf,
1098                                        u32 changed)
1099 {
1100         enum wl1251_cmd_ps_mode mode;
1101         struct wl1251 *wl = hw->priv;
1102         struct sk_buff *beacon;
1103         int ret;
1104
1105         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1106
1107         mutex_lock(&wl->mutex);
1108
1109         ret = wl1251_ps_elp_wakeup(wl);
1110         if (ret < 0)
1111                 goto out;
1112
1113         if (changed & BSS_CHANGED_BSSID) {
1114                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1115
1116                 ret = wl1251_build_null_data(wl);
1117                 if (ret < 0)
1118                         goto out;
1119
1120                 if (wl->bss_type != BSS_TYPE_IBSS) {
1121                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1122                                           wl->beacon_int, wl->dtim_period);
1123                         if (ret < 0)
1124                                 goto out_sleep;
1125                 }
1126         }
1127
1128         if (changed & BSS_CHANGED_ASSOC) {
1129                 if (bss_conf->assoc) {
1130                         wl->beacon_int = bss_conf->beacon_int;
1131                         wl->dtim_period = bss_conf->dtim_period;
1132
1133                         ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
1134                                                           wl->dtim_period);
1135                         wl->aid = bss_conf->aid;
1136
1137                         ret = wl1251_build_ps_poll(wl, wl->aid);
1138                         if (ret < 0)
1139                                 goto out_sleep;
1140
1141                         ret = wl1251_acx_aid(wl, wl->aid);
1142                         if (ret < 0)
1143                                 goto out_sleep;
1144
1145                         /* If we want to go in PSM but we're not there yet */
1146                         if (wl->psm_requested && !wl->psm) {
1147                                 mode = STATION_POWER_SAVE_MODE;
1148                                 ret = wl1251_ps_set_mode(wl, mode);
1149                                 if (ret < 0)
1150                                         goto out_sleep;
1151                         }
1152                 } else {
1153                         /* use defaults when not associated */
1154                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1155                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1156                 }
1157         }
1158         if (changed & BSS_CHANGED_ERP_SLOT) {
1159                 if (bss_conf->use_short_slot)
1160                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1161                 else
1162                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1163                 if (ret < 0) {
1164                         wl1251_warning("Set slot time failed %d", ret);
1165                         goto out_sleep;
1166                 }
1167         }
1168
1169         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1170                 if (bss_conf->use_short_preamble)
1171                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1172                 else
1173                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1174         }
1175
1176         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1177                 if (bss_conf->use_cts_prot)
1178                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1179                 else
1180                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1181                 if (ret < 0) {
1182                         wl1251_warning("Set ctsprotect failed %d", ret);
1183                         goto out;
1184                 }
1185         }
1186
1187         if (changed & BSS_CHANGED_BEACON) {
1188                 beacon = ieee80211_beacon_get(hw, vif);
1189                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1190                                               beacon->len);
1191
1192                 if (ret < 0) {
1193                         dev_kfree_skb(beacon);
1194                         goto out;
1195                 }
1196
1197                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1198                                               beacon->len);
1199
1200                 dev_kfree_skb(beacon);
1201
1202                 if (ret < 0)
1203                         goto out;
1204
1205                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1206                                   wl->channel, wl->dtim_period);
1207
1208                 if (ret < 0)
1209                         goto out;
1210         }
1211
1212 out_sleep:
1213         wl1251_ps_elp_sleep(wl);
1214
1215 out:
1216         mutex_unlock(&wl->mutex);
1217 }
1218
1219
1220 /* can't be const, mac80211 writes to this */
1221 static struct ieee80211_rate wl1251_rates[] = {
1222         { .bitrate = 10,
1223           .hw_value = 0x1,
1224           .hw_value_short = 0x1, },
1225         { .bitrate = 20,
1226           .hw_value = 0x2,
1227           .hw_value_short = 0x2,
1228           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1229         { .bitrate = 55,
1230           .hw_value = 0x4,
1231           .hw_value_short = 0x4,
1232           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1233         { .bitrate = 110,
1234           .hw_value = 0x20,
1235           .hw_value_short = 0x20,
1236           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1237         { .bitrate = 60,
1238           .hw_value = 0x8,
1239           .hw_value_short = 0x8, },
1240         { .bitrate = 90,
1241           .hw_value = 0x10,
1242           .hw_value_short = 0x10, },
1243         { .bitrate = 120,
1244           .hw_value = 0x40,
1245           .hw_value_short = 0x40, },
1246         { .bitrate = 180,
1247           .hw_value = 0x80,
1248           .hw_value_short = 0x80, },
1249         { .bitrate = 240,
1250           .hw_value = 0x200,
1251           .hw_value_short = 0x200, },
1252         { .bitrate = 360,
1253          .hw_value = 0x400,
1254          .hw_value_short = 0x400, },
1255         { .bitrate = 480,
1256           .hw_value = 0x800,
1257           .hw_value_short = 0x800, },
1258         { .bitrate = 540,
1259           .hw_value = 0x1000,
1260           .hw_value_short = 0x1000, },
1261 };
1262
1263 /* can't be const, mac80211 writes to this */
1264 static struct ieee80211_channel wl1251_channels[] = {
1265         { .hw_value = 1, .center_freq = 2412},
1266         { .hw_value = 2, .center_freq = 2417},
1267         { .hw_value = 3, .center_freq = 2422},
1268         { .hw_value = 4, .center_freq = 2427},
1269         { .hw_value = 5, .center_freq = 2432},
1270         { .hw_value = 6, .center_freq = 2437},
1271         { .hw_value = 7, .center_freq = 2442},
1272         { .hw_value = 8, .center_freq = 2447},
1273         { .hw_value = 9, .center_freq = 2452},
1274         { .hw_value = 10, .center_freq = 2457},
1275         { .hw_value = 11, .center_freq = 2462},
1276         { .hw_value = 12, .center_freq = 2467},
1277         { .hw_value = 13, .center_freq = 2472},
1278 };
1279
1280 /* can't be const, mac80211 writes to this */
1281 static struct ieee80211_supported_band wl1251_band_2ghz = {
1282         .channels = wl1251_channels,
1283         .n_channels = ARRAY_SIZE(wl1251_channels),
1284         .bitrates = wl1251_rates,
1285         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1286 };
1287
1288 static const struct ieee80211_ops wl1251_ops = {
1289         .start = wl1251_op_start,
1290         .stop = wl1251_op_stop,
1291         .add_interface = wl1251_op_add_interface,
1292         .remove_interface = wl1251_op_remove_interface,
1293         .config = wl1251_op_config,
1294         .configure_filter = wl1251_op_configure_filter,
1295         .tx = wl1251_op_tx,
1296         .set_key = wl1251_op_set_key,
1297         .hw_scan = wl1251_op_hw_scan,
1298         .bss_info_changed = wl1251_op_bss_info_changed,
1299         .set_rts_threshold = wl1251_op_set_rts_threshold,
1300 };
1301
1302 static int wl1251_register_hw(struct wl1251 *wl)
1303 {
1304         int ret;
1305
1306         if (wl->mac80211_registered)
1307                 return 0;
1308
1309         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1310
1311         ret = ieee80211_register_hw(wl->hw);
1312         if (ret < 0) {
1313                 wl1251_error("unable to register mac80211 hw: %d", ret);
1314                 return ret;
1315         }
1316
1317         wl->mac80211_registered = true;
1318
1319         wl1251_notice("loaded");
1320
1321         return 0;
1322 }
1323
1324 int wl1251_init_ieee80211(struct wl1251 *wl)
1325 {
1326         int ret;
1327
1328         /* The tx descriptor buffer and the TKIP space */
1329         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1330                 + WL1251_TKIP_IV_SPACE;
1331
1332         /* unit us */
1333         /* FIXME: find a proper value */
1334         wl->hw->channel_change_time = 10000;
1335
1336         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1337                 IEEE80211_HW_NOISE_DBM |
1338                 IEEE80211_HW_SUPPORTS_PS |
1339                 IEEE80211_HW_BEACON_FILTER;
1340
1341         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1342         wl->hw->wiphy->max_scan_ssids = 1;
1343         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1344
1345         ret = wl1251_register_hw(wl);
1346         if (ret)
1347                 goto out;
1348
1349         wl1251_debugfs_init(wl);
1350         wl1251_notice("initialized");
1351
1352         ret = 0;
1353
1354 out:
1355         return ret;
1356 }
1357 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1358
1359 struct ieee80211_hw *wl1251_alloc_hw(void)
1360 {
1361         struct ieee80211_hw *hw;
1362         struct wl1251 *wl;
1363         int i;
1364         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1365
1366         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1367         if (!hw) {
1368                 wl1251_error("could not alloc ieee80211_hw");
1369                 return ERR_PTR(-ENOMEM);
1370         }
1371
1372         wl = hw->priv;
1373         memset(wl, 0, sizeof(*wl));
1374
1375         wl->hw = hw;
1376
1377         wl->data_in_count = 0;
1378
1379         skb_queue_head_init(&wl->tx_queue);
1380
1381         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1382         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1383         wl->channel = WL1251_DEFAULT_CHANNEL;
1384         wl->scanning = false;
1385         wl->default_key = 0;
1386         wl->listen_int = 1;
1387         wl->rx_counter = 0;
1388         wl->rx_handled = 0;
1389         wl->rx_current_buffer = 0;
1390         wl->rx_last_id = 0;
1391         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1392         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1393         wl->elp = false;
1394         wl->psm = 0;
1395         wl->psm_requested = false;
1396         wl->tx_queue_stopped = false;
1397         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1398         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1399         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1400         wl->vif = NULL;
1401
1402         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1403                 wl->tx_frames[i] = NULL;
1404
1405         wl->next_tx_complete = 0;
1406
1407         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1408         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1409
1410         /*
1411          * In case our MAC address is not correctly set,
1412          * we use a random but Nokia MAC.
1413          */
1414         memcpy(wl->mac_addr, nokia_oui, 3);
1415         get_random_bytes(wl->mac_addr + 3, 3);
1416
1417         wl->state = WL1251_STATE_OFF;
1418         mutex_init(&wl->mutex);
1419
1420         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1421         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1422
1423         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1424         if (!wl->rx_descriptor) {
1425                 wl1251_error("could not allocate memory for rx descriptor");
1426                 ieee80211_free_hw(hw);
1427                 return ERR_PTR(-ENOMEM);
1428         }
1429
1430         return hw;
1431 }
1432 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1433
1434 int wl1251_free_hw(struct wl1251 *wl)
1435 {
1436         ieee80211_unregister_hw(wl->hw);
1437
1438         wl1251_debugfs_exit(wl);
1439
1440         kfree(wl->target_mem_map);
1441         kfree(wl->data_path);
1442         vfree(wl->fw);
1443         wl->fw = NULL;
1444         kfree(wl->nvs);
1445         wl->nvs = NULL;
1446
1447         kfree(wl->rx_descriptor);
1448         wl->rx_descriptor = NULL;
1449
1450         ieee80211_free_hw(wl->hw);
1451
1452         return 0;
1453 }
1454 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1455
1456 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1457 MODULE_LICENSE("GPL");
1458 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1459 MODULE_ALIAS("spi:wl1251");
1460 MODULE_FIRMWARE(WL1251_FW_NAME);