Merge branch '3.4-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target...
[firefly-linux-kernel-4.4.55.git] / drivers / net / wireless / wl1251 / main.c
1 /*
2  * This file is part of wl1251
3  *
4  * Copyright (C) 2008-2009 Nokia Corporation
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * version 2 as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18  * 02110-1301 USA
19  *
20  */
21
22 #include <linux/module.h>
23 #include <linux/interrupt.h>
24 #include <linux/firmware.h>
25 #include <linux/delay.h>
26 #include <linux/irq.h>
27 #include <linux/crc32.h>
28 #include <linux/etherdevice.h>
29 #include <linux/vmalloc.h>
30 #include <linux/slab.h>
31
32 #include "wl1251.h"
33 #include "wl12xx_80211.h"
34 #include "reg.h"
35 #include "io.h"
36 #include "cmd.h"
37 #include "event.h"
38 #include "tx.h"
39 #include "rx.h"
40 #include "ps.h"
41 #include "init.h"
42 #include "debugfs.h"
43 #include "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 int wl1251_power_off(struct wl1251 *wl)
56 {
57         return wl->if_ops->power(wl, false);
58 }
59
60 static int wl1251_power_on(struct wl1251 *wl)
61 {
62         return wl->if_ops->power(wl, 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 = vmalloc(wl->fw_len);
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 = kmemdup(fw->data, 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         ret = 0;
134
135 out:
136         release_firmware(fw);
137
138         return ret;
139 }
140
141 static void wl1251_fw_wakeup(struct wl1251 *wl)
142 {
143         u32 elp_reg;
144
145         elp_reg = ELPCTRL_WAKE_UP;
146         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
147         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
148
149         if (!(elp_reg & ELPCTRL_WLAN_READY))
150                 wl1251_warning("WLAN not ready");
151 }
152
153 static int wl1251_chip_wakeup(struct wl1251 *wl)
154 {
155         int ret;
156
157         ret = wl1251_power_on(wl);
158         if (ret < 0)
159                 return ret;
160
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         if (wl->nvs == NULL && !wl->use_eeprom) {
205                 /* No NVS from netlink, try to get it from the filesystem */
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_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
299                         wl1251_event_handle(wl, 0);
300                 }
301
302                 if (intr & WL1251_ACX_INTR_EVENT_B) {
303                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
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         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
344         if (ret < 0)
345                 wl1251_warning("join timeout");
346
347 out:
348         return ret;
349 }
350
351 static void wl1251_filter_work(struct work_struct *work)
352 {
353         struct wl1251 *wl =
354                 container_of(work, struct wl1251, filter_work);
355         int ret;
356
357         mutex_lock(&wl->mutex);
358
359         if (wl->state == WL1251_STATE_OFF)
360                 goto out;
361
362         ret = wl1251_ps_elp_wakeup(wl);
363         if (ret < 0)
364                 goto out;
365
366         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
367                           wl->dtim_period);
368         if (ret < 0)
369                 goto out_sleep;
370
371 out_sleep:
372         wl1251_ps_elp_sleep(wl);
373
374 out:
375         mutex_unlock(&wl->mutex);
376 }
377
378 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
379 {
380         struct wl1251 *wl = hw->priv;
381         unsigned long flags;
382
383         skb_queue_tail(&wl->tx_queue, skb);
384
385         /*
386          * The chip specific setup must run before the first TX packet -
387          * before that, the tx_work will not be initialized!
388          */
389
390         ieee80211_queue_work(wl->hw, &wl->tx_work);
391
392         /*
393          * The workqueue is slow to process the tx_queue and we need stop
394          * the queue here, otherwise the queue will get too long.
395          */
396         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
397                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
398
399                 spin_lock_irqsave(&wl->wl_lock, flags);
400                 ieee80211_stop_queues(wl->hw);
401                 wl->tx_queue_stopped = true;
402                 spin_unlock_irqrestore(&wl->wl_lock, flags);
403         }
404 }
405
406 static int wl1251_op_start(struct ieee80211_hw *hw)
407 {
408         struct wl1251 *wl = hw->priv;
409         struct wiphy *wiphy = hw->wiphy;
410         int ret = 0;
411
412         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
413
414         mutex_lock(&wl->mutex);
415
416         if (wl->state != WL1251_STATE_OFF) {
417                 wl1251_error("cannot start because not in off state: %d",
418                              wl->state);
419                 ret = -EBUSY;
420                 goto out;
421         }
422
423         ret = wl1251_chip_wakeup(wl);
424         if (ret < 0)
425                 goto out;
426
427         ret = wl1251_boot(wl);
428         if (ret < 0)
429                 goto out;
430
431         ret = wl1251_hw_init(wl);
432         if (ret < 0)
433                 goto out;
434
435         ret = wl1251_acx_station_id(wl);
436         if (ret < 0)
437                 goto out;
438
439         wl->state = WL1251_STATE_ON;
440
441         wl1251_info("firmware booted (%s)", wl->fw_ver);
442
443         /* update hw/fw version info in wiphy struct */
444         wiphy->hw_version = wl->chip_id;
445         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
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                 ieee80211_scan_completed(wl->hw, true);
470                 wl->scanning = false;
471         }
472
473         wl->state = WL1251_STATE_OFF;
474
475         wl1251_disable_interrupts(wl);
476
477         mutex_unlock(&wl->mutex);
478
479         cancel_work_sync(&wl->irq_work);
480         cancel_work_sync(&wl->tx_work);
481         cancel_work_sync(&wl->filter_work);
482         cancel_delayed_work_sync(&wl->elp_work);
483
484         mutex_lock(&wl->mutex);
485
486         /* let's notify MAC80211 about the remaining pending TX frames */
487         wl1251_tx_flush(wl);
488         wl1251_power_off(wl);
489
490         memset(wl->bssid, 0, ETH_ALEN);
491         wl->listen_int = 1;
492         wl->bss_type = MAX_BSS_TYPE;
493
494         wl->data_in_count = 0;
495         wl->rx_counter = 0;
496         wl->rx_handled = 0;
497         wl->rx_current_buffer = 0;
498         wl->rx_last_id = 0;
499         wl->next_tx_complete = 0;
500         wl->elp = false;
501         wl->station_mode = STATION_ACTIVE_MODE;
502         wl->tx_queue_stopped = false;
503         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
504         wl->rssi_thold = 0;
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_vif *vif)
514 {
515         struct wl1251 *wl = hw->priv;
516         int ret = 0;
517
518         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
519                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
520
521         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
522                      vif->type, vif->addr);
523
524         mutex_lock(&wl->mutex);
525         if (wl->vif) {
526                 ret = -EBUSY;
527                 goto out;
528         }
529
530         wl->vif = vif;
531
532         switch (vif->type) {
533         case NL80211_IFTYPE_STATION:
534                 wl->bss_type = BSS_TYPE_STA_BSS;
535                 break;
536         case NL80211_IFTYPE_ADHOC:
537                 wl->bss_type = BSS_TYPE_IBSS;
538                 break;
539         default:
540                 ret = -EOPNOTSUPP;
541                 goto out;
542         }
543
544         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
545                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
546                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
547                 ret = wl1251_acx_station_id(wl);
548                 if (ret < 0)
549                         goto out;
550         }
551
552 out:
553         mutex_unlock(&wl->mutex);
554         return ret;
555 }
556
557 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
558                                          struct ieee80211_vif *vif)
559 {
560         struct wl1251 *wl = hw->priv;
561
562         mutex_lock(&wl->mutex);
563         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
564         wl->vif = NULL;
565         mutex_unlock(&wl->mutex);
566 }
567
568 static int wl1251_build_qos_null_data(struct wl1251 *wl)
569 {
570         struct ieee80211_qos_hdr template;
571
572         memset(&template, 0, sizeof(template));
573
574         memcpy(template.addr1, wl->bssid, ETH_ALEN);
575         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
576         memcpy(template.addr3, wl->bssid, ETH_ALEN);
577
578         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
579                                              IEEE80211_STYPE_QOS_NULLFUNC |
580                                              IEEE80211_FCTL_TODS);
581
582         /* FIXME: not sure what priority to use here */
583         template.qos_ctrl = cpu_to_le16(0);
584
585         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
586                                        sizeof(template));
587 }
588
589 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
590 {
591         struct wl1251 *wl = hw->priv;
592         struct ieee80211_conf *conf = &hw->conf;
593         int channel, ret = 0;
594
595         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
596
597         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
598                      channel,
599                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
600                      conf->power_level);
601
602         mutex_lock(&wl->mutex);
603
604         ret = wl1251_ps_elp_wakeup(wl);
605         if (ret < 0)
606                 goto out;
607
608         if (channel != wl->channel) {
609                 wl->channel = channel;
610
611                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
612                                   wl->beacon_int, wl->dtim_period);
613                 if (ret < 0)
614                         goto out_sleep;
615         }
616
617         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
618                 wl1251_debug(DEBUG_PSM, "psm enabled");
619
620                 wl->psm_requested = true;
621
622                 wl->dtim_period = conf->ps_dtim_period;
623
624                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
625                                                   wl->dtim_period);
626
627                 /*
628                  * mac80211 enables PSM only if we're already associated.
629                  */
630                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
631                 if (ret < 0)
632                         goto out_sleep;
633         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
634                    wl->psm_requested) {
635                 wl1251_debug(DEBUG_PSM, "psm disabled");
636
637                 wl->psm_requested = false;
638
639                 if (wl->station_mode != STATION_ACTIVE_MODE) {
640                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
641                         if (ret < 0)
642                                 goto out_sleep;
643                 }
644         }
645
646         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
647                 if (conf->flags & IEEE80211_CONF_IDLE) {
648                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
649                         if (ret < 0)
650                                 goto out_sleep;
651                 } else {
652                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
653                         if (ret < 0)
654                                 goto out_sleep;
655                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
656                                           wl->beacon_int, wl->dtim_period);
657                         if (ret < 0)
658                                 goto out_sleep;
659                 }
660         }
661
662         if (conf->power_level != wl->power_level) {
663                 ret = wl1251_acx_tx_power(wl, conf->power_level);
664                 if (ret < 0)
665                         goto out_sleep;
666
667                 wl->power_level = conf->power_level;
668         }
669
670 out_sleep:
671         wl1251_ps_elp_sleep(wl);
672
673 out:
674         mutex_unlock(&wl->mutex);
675
676         return ret;
677 }
678
679 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
680                                   FIF_ALLMULTI | \
681                                   FIF_FCSFAIL | \
682                                   FIF_BCN_PRBRESP_PROMISC | \
683                                   FIF_CONTROL | \
684                                   FIF_OTHER_BSS)
685
686 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
687                                        unsigned int changed,
688                                        unsigned int *total,u64 multicast)
689 {
690         struct wl1251 *wl = hw->priv;
691
692         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
693
694         *total &= WL1251_SUPPORTED_FILTERS;
695         changed &= WL1251_SUPPORTED_FILTERS;
696
697         if (changed == 0)
698                 /* no filters which we support changed */
699                 return;
700
701         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
702
703         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
704         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
705
706         if (*total & FIF_PROMISC_IN_BSS) {
707                 wl->rx_config |= CFG_BSSID_FILTER_EN;
708                 wl->rx_config |= CFG_RX_ALL_GOOD;
709         }
710         if (*total & FIF_ALLMULTI)
711                 /*
712                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
713                  * all multicast frames
714                  */
715                 wl->rx_config &= ~CFG_MC_FILTER_EN;
716         if (*total & FIF_FCSFAIL)
717                 wl->rx_filter |= CFG_RX_FCS_ERROR;
718         if (*total & FIF_BCN_PRBRESP_PROMISC) {
719                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
720                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
721         }
722         if (*total & FIF_CONTROL)
723                 wl->rx_filter |= CFG_RX_CTL_EN;
724         if (*total & FIF_OTHER_BSS)
725                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
726
727         /*
728          * FIXME: workqueues need to be properly cancelled on stop(), for
729          * now let's just disable changing the filter settings. They will
730          * be updated any on config().
731          */
732         /* schedule_work(&wl->filter_work); */
733 }
734
735 /* HW encryption */
736 static int wl1251_set_key_type(struct wl1251 *wl,
737                                struct wl1251_cmd_set_keys *key,
738                                enum set_key_cmd cmd,
739                                struct ieee80211_key_conf *mac80211_key,
740                                const u8 *addr)
741 {
742         switch (mac80211_key->cipher) {
743         case WLAN_CIPHER_SUITE_WEP40:
744         case WLAN_CIPHER_SUITE_WEP104:
745                 if (is_broadcast_ether_addr(addr))
746                         key->key_type = KEY_WEP_DEFAULT;
747                 else
748                         key->key_type = KEY_WEP_ADDR;
749
750                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
751                 break;
752         case WLAN_CIPHER_SUITE_TKIP:
753                 if (is_broadcast_ether_addr(addr))
754                         key->key_type = KEY_TKIP_MIC_GROUP;
755                 else
756                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
757
758                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
759                 break;
760         case WLAN_CIPHER_SUITE_CCMP:
761                 if (is_broadcast_ether_addr(addr))
762                         key->key_type = KEY_AES_GROUP;
763                 else
764                         key->key_type = KEY_AES_PAIRWISE;
765                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
766                 break;
767         default:
768                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
769                 return -EOPNOTSUPP;
770         }
771
772         return 0;
773 }
774
775 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
776                              struct ieee80211_vif *vif,
777                              struct ieee80211_sta *sta,
778                              struct ieee80211_key_conf *key)
779 {
780         struct wl1251 *wl = hw->priv;
781         struct wl1251_cmd_set_keys *wl_cmd;
782         const u8 *addr;
783         int ret;
784
785         static const u8 bcast_addr[ETH_ALEN] =
786                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
787
788         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
789
790         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
791         if (!wl_cmd) {
792                 ret = -ENOMEM;
793                 goto out;
794         }
795
796         addr = sta ? sta->addr : bcast_addr;
797
798         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
799         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
800         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
801                      key->cipher, key->keyidx, key->keylen, key->flags);
802         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
803
804         if (is_zero_ether_addr(addr)) {
805                 /* We dont support TX only encryption */
806                 ret = -EOPNOTSUPP;
807                 goto out;
808         }
809
810         mutex_lock(&wl->mutex);
811
812         ret = wl1251_ps_elp_wakeup(wl);
813         if (ret < 0)
814                 goto out_unlock;
815
816         switch (cmd) {
817         case SET_KEY:
818                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
819                 break;
820         case DISABLE_KEY:
821                 wl_cmd->key_action = KEY_REMOVE;
822                 break;
823         default:
824                 wl1251_error("Unsupported key cmd 0x%x", cmd);
825                 break;
826         }
827
828         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
829         if (ret < 0) {
830                 wl1251_error("Set KEY type failed");
831                 goto out_sleep;
832         }
833
834         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
835                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
836
837         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
838             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
839                 /*
840                  * We get the key in the following form:
841                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
842                  * but the target is expecting:
843                  * TKIP - RX MIC - TX MIC
844                  */
845                 memcpy(wl_cmd->key, key->key, 16);
846                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
847                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
848
849         } else {
850                 memcpy(wl_cmd->key, key->key, key->keylen);
851         }
852         wl_cmd->key_size = key->keylen;
853
854         wl_cmd->id = key->keyidx;
855         wl_cmd->ssid_profile = 0;
856
857         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
858
859         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
860         if (ret < 0) {
861                 wl1251_warning("could not set keys");
862                 goto out_sleep;
863         }
864
865 out_sleep:
866         wl1251_ps_elp_sleep(wl);
867
868 out_unlock:
869         mutex_unlock(&wl->mutex);
870
871 out:
872         kfree(wl_cmd);
873
874         return ret;
875 }
876
877 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
878                              struct ieee80211_vif *vif,
879                              struct cfg80211_scan_request *req)
880 {
881         struct wl1251 *wl = hw->priv;
882         struct sk_buff *skb;
883         size_t ssid_len = 0;
884         u8 *ssid = NULL;
885         int ret;
886
887         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
888
889         if (req->n_ssids) {
890                 ssid = req->ssids[0].ssid;
891                 ssid_len = req->ssids[0].ssid_len;
892         }
893
894         mutex_lock(&wl->mutex);
895
896         if (wl->scanning) {
897                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
898                 ret = -EINVAL;
899                 goto out;
900         }
901
902         ret = wl1251_ps_elp_wakeup(wl);
903         if (ret < 0)
904                 goto out;
905
906         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
907                                      req->ie, req->ie_len);
908         if (!skb) {
909                 ret = -ENOMEM;
910                 goto out;
911         }
912
913         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
914                                       skb->len);
915         dev_kfree_skb(skb);
916         if (ret < 0)
917                 goto out_sleep;
918
919         ret = wl1251_cmd_trigger_scan_to(wl, 0);
920         if (ret < 0)
921                 goto out_sleep;
922
923         wl->scanning = true;
924
925         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
926                               req->n_channels, WL1251_SCAN_NUM_PROBES);
927         if (ret < 0) {
928                 wl->scanning = false;
929                 goto out_sleep;
930         }
931
932 out_sleep:
933         wl1251_ps_elp_sleep(wl);
934
935 out:
936         mutex_unlock(&wl->mutex);
937
938         return ret;
939 }
940
941 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
942 {
943         struct wl1251 *wl = hw->priv;
944         int ret;
945
946         mutex_lock(&wl->mutex);
947
948         ret = wl1251_ps_elp_wakeup(wl);
949         if (ret < 0)
950                 goto out;
951
952         ret = wl1251_acx_rts_threshold(wl, (u16) value);
953         if (ret < 0)
954                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
955
956         wl1251_ps_elp_sleep(wl);
957
958 out:
959         mutex_unlock(&wl->mutex);
960
961         return ret;
962 }
963
964 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
965                                        struct ieee80211_vif *vif,
966                                        struct ieee80211_bss_conf *bss_conf,
967                                        u32 changed)
968 {
969         struct wl1251 *wl = hw->priv;
970         struct sk_buff *beacon, *skb;
971         int ret;
972
973         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
974
975         mutex_lock(&wl->mutex);
976
977         ret = wl1251_ps_elp_wakeup(wl);
978         if (ret < 0)
979                 goto out;
980
981         if (changed & BSS_CHANGED_CQM) {
982                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
983                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
984                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
985                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
986                 if (ret < 0)
987                         goto out;
988                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
989         }
990
991         if (changed & BSS_CHANGED_BSSID) {
992                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
993
994                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
995                 if (!skb)
996                         goto out_sleep;
997
998                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
999                                               skb->data, skb->len);
1000                 dev_kfree_skb(skb);
1001                 if (ret < 0)
1002                         goto out_sleep;
1003
1004                 ret = wl1251_build_qos_null_data(wl);
1005                 if (ret < 0)
1006                         goto out;
1007
1008                 if (wl->bss_type != BSS_TYPE_IBSS) {
1009                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1010                                           wl->beacon_int, wl->dtim_period);
1011                         if (ret < 0)
1012                                 goto out_sleep;
1013                 }
1014         }
1015
1016         if (changed & BSS_CHANGED_ASSOC) {
1017                 if (bss_conf->assoc) {
1018                         wl->beacon_int = bss_conf->beacon_int;
1019
1020                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1021                         if (!skb)
1022                                 goto out_sleep;
1023
1024                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1025                                                       skb->data,
1026                                                       skb->len);
1027                         dev_kfree_skb(skb);
1028                         if (ret < 0)
1029                                 goto out_sleep;
1030
1031                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1032                         if (ret < 0)
1033                                 goto out_sleep;
1034                 } else {
1035                         /* use defaults when not associated */
1036                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1037                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1038                 }
1039         }
1040         if (changed & BSS_CHANGED_ERP_SLOT) {
1041                 if (bss_conf->use_short_slot)
1042                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1043                 else
1044                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1045                 if (ret < 0) {
1046                         wl1251_warning("Set slot time failed %d", ret);
1047                         goto out_sleep;
1048                 }
1049         }
1050
1051         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1052                 if (bss_conf->use_short_preamble)
1053                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1054                 else
1055                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1056         }
1057
1058         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1059                 if (bss_conf->use_cts_prot)
1060                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1061                 else
1062                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1063                 if (ret < 0) {
1064                         wl1251_warning("Set ctsprotect failed %d", ret);
1065                         goto out_sleep;
1066                 }
1067         }
1068
1069         if (changed & BSS_CHANGED_BEACON) {
1070                 beacon = ieee80211_beacon_get(hw, vif);
1071                 if (!beacon)
1072                         goto out_sleep;
1073
1074                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1075                                               beacon->len);
1076
1077                 if (ret < 0) {
1078                         dev_kfree_skb(beacon);
1079                         goto out_sleep;
1080                 }
1081
1082                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1083                                               beacon->len);
1084
1085                 dev_kfree_skb(beacon);
1086
1087                 if (ret < 0)
1088                         goto out_sleep;
1089
1090                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1091                                   wl->channel, wl->dtim_period);
1092
1093                 if (ret < 0)
1094                         goto out_sleep;
1095         }
1096
1097 out_sleep:
1098         wl1251_ps_elp_sleep(wl);
1099
1100 out:
1101         mutex_unlock(&wl->mutex);
1102 }
1103
1104
1105 /* can't be const, mac80211 writes to this */
1106 static struct ieee80211_rate wl1251_rates[] = {
1107         { .bitrate = 10,
1108           .hw_value = 0x1,
1109           .hw_value_short = 0x1, },
1110         { .bitrate = 20,
1111           .hw_value = 0x2,
1112           .hw_value_short = 0x2,
1113           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1114         { .bitrate = 55,
1115           .hw_value = 0x4,
1116           .hw_value_short = 0x4,
1117           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1118         { .bitrate = 110,
1119           .hw_value = 0x20,
1120           .hw_value_short = 0x20,
1121           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1122         { .bitrate = 60,
1123           .hw_value = 0x8,
1124           .hw_value_short = 0x8, },
1125         { .bitrate = 90,
1126           .hw_value = 0x10,
1127           .hw_value_short = 0x10, },
1128         { .bitrate = 120,
1129           .hw_value = 0x40,
1130           .hw_value_short = 0x40, },
1131         { .bitrate = 180,
1132           .hw_value = 0x80,
1133           .hw_value_short = 0x80, },
1134         { .bitrate = 240,
1135           .hw_value = 0x200,
1136           .hw_value_short = 0x200, },
1137         { .bitrate = 360,
1138          .hw_value = 0x400,
1139          .hw_value_short = 0x400, },
1140         { .bitrate = 480,
1141           .hw_value = 0x800,
1142           .hw_value_short = 0x800, },
1143         { .bitrate = 540,
1144           .hw_value = 0x1000,
1145           .hw_value_short = 0x1000, },
1146 };
1147
1148 /* can't be const, mac80211 writes to this */
1149 static struct ieee80211_channel wl1251_channels[] = {
1150         { .hw_value = 1, .center_freq = 2412},
1151         { .hw_value = 2, .center_freq = 2417},
1152         { .hw_value = 3, .center_freq = 2422},
1153         { .hw_value = 4, .center_freq = 2427},
1154         { .hw_value = 5, .center_freq = 2432},
1155         { .hw_value = 6, .center_freq = 2437},
1156         { .hw_value = 7, .center_freq = 2442},
1157         { .hw_value = 8, .center_freq = 2447},
1158         { .hw_value = 9, .center_freq = 2452},
1159         { .hw_value = 10, .center_freq = 2457},
1160         { .hw_value = 11, .center_freq = 2462},
1161         { .hw_value = 12, .center_freq = 2467},
1162         { .hw_value = 13, .center_freq = 2472},
1163 };
1164
1165 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1166                              struct ieee80211_vif *vif, u16 queue,
1167                              const struct ieee80211_tx_queue_params *params)
1168 {
1169         enum wl1251_acx_ps_scheme ps_scheme;
1170         struct wl1251 *wl = hw->priv;
1171         int ret;
1172
1173         mutex_lock(&wl->mutex);
1174
1175         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1176
1177         ret = wl1251_ps_elp_wakeup(wl);
1178         if (ret < 0)
1179                 goto out;
1180
1181         /* mac80211 uses units of 32 usec */
1182         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1183                                 params->cw_min, params->cw_max,
1184                                 params->aifs, params->txop * 32);
1185         if (ret < 0)
1186                 goto out_sleep;
1187
1188         if (params->uapsd)
1189                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1190         else
1191                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1192
1193         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1194                                  CHANNEL_TYPE_EDCF,
1195                                  wl1251_tx_get_queue(queue), ps_scheme,
1196                                  WL1251_ACX_ACK_POLICY_LEGACY);
1197         if (ret < 0)
1198                 goto out_sleep;
1199
1200 out_sleep:
1201         wl1251_ps_elp_sleep(wl);
1202
1203 out:
1204         mutex_unlock(&wl->mutex);
1205
1206         return ret;
1207 }
1208
1209 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1210                                 struct survey_info *survey)
1211 {
1212         struct wl1251 *wl = hw->priv;
1213         struct ieee80211_conf *conf = &hw->conf;
1214  
1215         if (idx != 0)
1216                 return -ENOENT;
1217  
1218         survey->channel = conf->channel;
1219         survey->filled = SURVEY_INFO_NOISE_DBM;
1220         survey->noise = wl->noise;
1221  
1222         return 0;
1223 }
1224
1225 /* can't be const, mac80211 writes to this */
1226 static struct ieee80211_supported_band wl1251_band_2ghz = {
1227         .channels = wl1251_channels,
1228         .n_channels = ARRAY_SIZE(wl1251_channels),
1229         .bitrates = wl1251_rates,
1230         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1231 };
1232
1233 static const struct ieee80211_ops wl1251_ops = {
1234         .start = wl1251_op_start,
1235         .stop = wl1251_op_stop,
1236         .add_interface = wl1251_op_add_interface,
1237         .remove_interface = wl1251_op_remove_interface,
1238         .config = wl1251_op_config,
1239         .configure_filter = wl1251_op_configure_filter,
1240         .tx = wl1251_op_tx,
1241         .set_key = wl1251_op_set_key,
1242         .hw_scan = wl1251_op_hw_scan,
1243         .bss_info_changed = wl1251_op_bss_info_changed,
1244         .set_rts_threshold = wl1251_op_set_rts_threshold,
1245         .conf_tx = wl1251_op_conf_tx,
1246         .get_survey = wl1251_op_get_survey,
1247 };
1248
1249 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1250 {
1251         unsigned long timeout;
1252
1253         wl1251_reg_write32(wl, EE_ADDR, offset);
1254         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1255
1256         /* EE_CTL_READ clears when data is ready */
1257         timeout = jiffies + msecs_to_jiffies(100);
1258         while (1) {
1259                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1260                         break;
1261
1262                 if (time_after(jiffies, timeout))
1263                         return -ETIMEDOUT;
1264
1265                 msleep(1);
1266         }
1267
1268         *data = wl1251_reg_read32(wl, EE_DATA);
1269         return 0;
1270 }
1271
1272 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1273                               u8 *data, size_t len)
1274 {
1275         size_t i;
1276         int ret;
1277
1278         wl1251_reg_write32(wl, EE_START, 0);
1279
1280         for (i = 0; i < len; i++) {
1281                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1282                 if (ret < 0)
1283                         return ret;
1284         }
1285
1286         return 0;
1287 }
1288
1289 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1290 {
1291         u8 mac[ETH_ALEN];
1292         int i, ret;
1293
1294         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1295
1296         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1297         if (ret < 0) {
1298                 wl1251_warning("failed to read MAC address from EEPROM");
1299                 return ret;
1300         }
1301
1302         /* MAC is stored in reverse order */
1303         for (i = 0; i < ETH_ALEN; i++)
1304                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1305
1306         return 0;
1307 }
1308
1309 static int wl1251_register_hw(struct wl1251 *wl)
1310 {
1311         int ret;
1312
1313         if (wl->mac80211_registered)
1314                 return 0;
1315
1316         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1317
1318         ret = ieee80211_register_hw(wl->hw);
1319         if (ret < 0) {
1320                 wl1251_error("unable to register mac80211 hw: %d", ret);
1321                 return ret;
1322         }
1323
1324         wl->mac80211_registered = true;
1325
1326         wl1251_notice("loaded");
1327
1328         return 0;
1329 }
1330
1331 int wl1251_init_ieee80211(struct wl1251 *wl)
1332 {
1333         int ret;
1334
1335         /* The tx descriptor buffer and the TKIP space */
1336         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1337                 + WL1251_TKIP_IV_SPACE;
1338
1339         /* unit us */
1340         /* FIXME: find a proper value */
1341         wl->hw->channel_change_time = 10000;
1342
1343         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1344                 IEEE80211_HW_SUPPORTS_PS |
1345                 IEEE80211_HW_SUPPORTS_UAPSD;
1346
1347         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1348                                          BIT(NL80211_IFTYPE_ADHOC);
1349         wl->hw->wiphy->max_scan_ssids = 1;
1350         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1351
1352         wl->hw->queues = 4;
1353
1354         if (wl->use_eeprom)
1355                 wl1251_read_eeprom_mac(wl);
1356
1357         ret = wl1251_register_hw(wl);
1358         if (ret)
1359                 goto out;
1360
1361         wl1251_debugfs_init(wl);
1362         wl1251_notice("initialized");
1363
1364         ret = 0;
1365
1366 out:
1367         return ret;
1368 }
1369 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1370
1371 struct ieee80211_hw *wl1251_alloc_hw(void)
1372 {
1373         struct ieee80211_hw *hw;
1374         struct wl1251 *wl;
1375         int i;
1376         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1377
1378         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1379         if (!hw) {
1380                 wl1251_error("could not alloc ieee80211_hw");
1381                 return ERR_PTR(-ENOMEM);
1382         }
1383
1384         wl = hw->priv;
1385         memset(wl, 0, sizeof(*wl));
1386
1387         wl->hw = hw;
1388
1389         wl->data_in_count = 0;
1390
1391         skb_queue_head_init(&wl->tx_queue);
1392
1393         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1394         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1395         wl->channel = WL1251_DEFAULT_CHANNEL;
1396         wl->scanning = false;
1397         wl->default_key = 0;
1398         wl->listen_int = 1;
1399         wl->rx_counter = 0;
1400         wl->rx_handled = 0;
1401         wl->rx_current_buffer = 0;
1402         wl->rx_last_id = 0;
1403         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1404         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1405         wl->elp = false;
1406         wl->station_mode = STATION_ACTIVE_MODE;
1407         wl->psm_requested = false;
1408         wl->tx_queue_stopped = false;
1409         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1410         wl->rssi_thold = 0;
1411         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1412         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1413         wl->vif = NULL;
1414
1415         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1416                 wl->tx_frames[i] = NULL;
1417
1418         wl->next_tx_complete = 0;
1419
1420         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1421         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1422
1423         /*
1424          * In case our MAC address is not correctly set,
1425          * we use a random but Nokia MAC.
1426          */
1427         memcpy(wl->mac_addr, nokia_oui, 3);
1428         get_random_bytes(wl->mac_addr + 3, 3);
1429
1430         wl->state = WL1251_STATE_OFF;
1431         mutex_init(&wl->mutex);
1432
1433         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1434         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1435
1436         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1437         if (!wl->rx_descriptor) {
1438                 wl1251_error("could not allocate memory for rx descriptor");
1439                 ieee80211_free_hw(hw);
1440                 return ERR_PTR(-ENOMEM);
1441         }
1442
1443         return hw;
1444 }
1445 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1446
1447 int wl1251_free_hw(struct wl1251 *wl)
1448 {
1449         ieee80211_unregister_hw(wl->hw);
1450
1451         wl1251_debugfs_exit(wl);
1452
1453         kfree(wl->target_mem_map);
1454         kfree(wl->data_path);
1455         vfree(wl->fw);
1456         wl->fw = NULL;
1457         kfree(wl->nvs);
1458         wl->nvs = NULL;
1459
1460         kfree(wl->rx_descriptor);
1461         wl->rx_descriptor = NULL;
1462
1463         ieee80211_free_hw(wl->hw);
1464
1465         return 0;
1466 }
1467 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1468
1469 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1470 MODULE_LICENSE("GPL");
1471 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1472 MODULE_FIRMWARE(WL1251_FW_NAME);