Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[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
483         mutex_lock(&wl->mutex);
484
485         /* let's notify MAC80211 about the remaining pending TX frames */
486         wl1251_tx_flush(wl);
487         wl1251_power_off(wl);
488
489         memset(wl->bssid, 0, ETH_ALEN);
490         wl->listen_int = 1;
491         wl->bss_type = MAX_BSS_TYPE;
492
493         wl->data_in_count = 0;
494         wl->rx_counter = 0;
495         wl->rx_handled = 0;
496         wl->rx_current_buffer = 0;
497         wl->rx_last_id = 0;
498         wl->next_tx_complete = 0;
499         wl->elp = false;
500         wl->station_mode = STATION_ACTIVE_MODE;
501         wl->tx_queue_stopped = false;
502         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
503         wl->rssi_thold = 0;
504         wl->channel = WL1251_DEFAULT_CHANNEL;
505
506         wl1251_debugfs_reset(wl);
507
508         mutex_unlock(&wl->mutex);
509 }
510
511 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
512                                    struct ieee80211_vif *vif)
513 {
514         struct wl1251 *wl = hw->priv;
515         int ret = 0;
516
517         vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
518                              IEEE80211_VIF_SUPPORTS_CQM_RSSI;
519
520         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
521                      vif->type, vif->addr);
522
523         mutex_lock(&wl->mutex);
524         if (wl->vif) {
525                 ret = -EBUSY;
526                 goto out;
527         }
528
529         wl->vif = vif;
530
531         switch (vif->type) {
532         case NL80211_IFTYPE_STATION:
533                 wl->bss_type = BSS_TYPE_STA_BSS;
534                 break;
535         case NL80211_IFTYPE_ADHOC:
536                 wl->bss_type = BSS_TYPE_IBSS;
537                 break;
538         default:
539                 ret = -EOPNOTSUPP;
540                 goto out;
541         }
542
543         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
544                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
545                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
546                 ret = wl1251_acx_station_id(wl);
547                 if (ret < 0)
548                         goto out;
549         }
550
551 out:
552         mutex_unlock(&wl->mutex);
553         return ret;
554 }
555
556 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
557                                          struct ieee80211_vif *vif)
558 {
559         struct wl1251 *wl = hw->priv;
560
561         mutex_lock(&wl->mutex);
562         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
563         wl->vif = NULL;
564         mutex_unlock(&wl->mutex);
565 }
566
567 static int wl1251_build_qos_null_data(struct wl1251 *wl)
568 {
569         struct ieee80211_qos_hdr template;
570
571         memset(&template, 0, sizeof(template));
572
573         memcpy(template.addr1, wl->bssid, ETH_ALEN);
574         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
575         memcpy(template.addr3, wl->bssid, ETH_ALEN);
576
577         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
578                                              IEEE80211_STYPE_QOS_NULLFUNC |
579                                              IEEE80211_FCTL_TODS);
580
581         /* FIXME: not sure what priority to use here */
582         template.qos_ctrl = cpu_to_le16(0);
583
584         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
585                                        sizeof(template));
586 }
587
588 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
589 {
590         struct wl1251 *wl = hw->priv;
591         struct ieee80211_conf *conf = &hw->conf;
592         int channel, ret = 0;
593
594         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
595
596         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
597                      channel,
598                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
599                      conf->power_level);
600
601         mutex_lock(&wl->mutex);
602
603         ret = wl1251_ps_elp_wakeup(wl);
604         if (ret < 0)
605                 goto out;
606
607         if (channel != wl->channel) {
608                 wl->channel = channel;
609
610                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
611                                   wl->beacon_int, wl->dtim_period);
612                 if (ret < 0)
613                         goto out_sleep;
614         }
615
616         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
617                 wl1251_debug(DEBUG_PSM, "psm enabled");
618
619                 wl->psm_requested = true;
620
621                 wl->dtim_period = conf->ps_dtim_period;
622
623                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
624                                                   wl->dtim_period);
625
626                 /*
627                  * mac80211 enables PSM only if we're already associated.
628                  */
629                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
630                 if (ret < 0)
631                         goto out_sleep;
632         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
633                    wl->psm_requested) {
634                 wl1251_debug(DEBUG_PSM, "psm disabled");
635
636                 wl->psm_requested = false;
637
638                 if (wl->station_mode != STATION_ACTIVE_MODE) {
639                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
640                         if (ret < 0)
641                                 goto out_sleep;
642                 }
643         }
644
645         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
646                 if (conf->flags & IEEE80211_CONF_IDLE) {
647                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
648                         if (ret < 0)
649                                 goto out_sleep;
650                 } else {
651                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
652                         if (ret < 0)
653                                 goto out_sleep;
654                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
655                                           wl->beacon_int, wl->dtim_period);
656                         if (ret < 0)
657                                 goto out_sleep;
658                 }
659         }
660
661         if (conf->power_level != wl->power_level) {
662                 ret = wl1251_acx_tx_power(wl, conf->power_level);
663                 if (ret < 0)
664                         goto out_sleep;
665
666                 wl->power_level = conf->power_level;
667         }
668
669 out_sleep:
670         wl1251_ps_elp_sleep(wl);
671
672 out:
673         mutex_unlock(&wl->mutex);
674
675         return ret;
676 }
677
678 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
679                                   FIF_ALLMULTI | \
680                                   FIF_FCSFAIL | \
681                                   FIF_BCN_PRBRESP_PROMISC | \
682                                   FIF_CONTROL | \
683                                   FIF_OTHER_BSS)
684
685 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
686                                        unsigned int changed,
687                                        unsigned int *total,u64 multicast)
688 {
689         struct wl1251 *wl = hw->priv;
690
691         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
692
693         *total &= WL1251_SUPPORTED_FILTERS;
694         changed &= WL1251_SUPPORTED_FILTERS;
695
696         if (changed == 0)
697                 /* no filters which we support changed */
698                 return;
699
700         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
701
702         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
703         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
704
705         if (*total & FIF_PROMISC_IN_BSS) {
706                 wl->rx_config |= CFG_BSSID_FILTER_EN;
707                 wl->rx_config |= CFG_RX_ALL_GOOD;
708         }
709         if (*total & FIF_ALLMULTI)
710                 /*
711                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
712                  * all multicast frames
713                  */
714                 wl->rx_config &= ~CFG_MC_FILTER_EN;
715         if (*total & FIF_FCSFAIL)
716                 wl->rx_filter |= CFG_RX_FCS_ERROR;
717         if (*total & FIF_BCN_PRBRESP_PROMISC) {
718                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
719                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
720         }
721         if (*total & FIF_CONTROL)
722                 wl->rx_filter |= CFG_RX_CTL_EN;
723         if (*total & FIF_OTHER_BSS)
724                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
725
726         /*
727          * FIXME: workqueues need to be properly cancelled on stop(), for
728          * now let's just disable changing the filter settings. They will
729          * be updated any on config().
730          */
731         /* schedule_work(&wl->filter_work); */
732 }
733
734 /* HW encryption */
735 static int wl1251_set_key_type(struct wl1251 *wl,
736                                struct wl1251_cmd_set_keys *key,
737                                enum set_key_cmd cmd,
738                                struct ieee80211_key_conf *mac80211_key,
739                                const u8 *addr)
740 {
741         switch (mac80211_key->cipher) {
742         case WLAN_CIPHER_SUITE_WEP40:
743         case WLAN_CIPHER_SUITE_WEP104:
744                 if (is_broadcast_ether_addr(addr))
745                         key->key_type = KEY_WEP_DEFAULT;
746                 else
747                         key->key_type = KEY_WEP_ADDR;
748
749                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
750                 break;
751         case WLAN_CIPHER_SUITE_TKIP:
752                 if (is_broadcast_ether_addr(addr))
753                         key->key_type = KEY_TKIP_MIC_GROUP;
754                 else
755                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
756
757                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
758                 break;
759         case WLAN_CIPHER_SUITE_CCMP:
760                 if (is_broadcast_ether_addr(addr))
761                         key->key_type = KEY_AES_GROUP;
762                 else
763                         key->key_type = KEY_AES_PAIRWISE;
764                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
765                 break;
766         default:
767                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
768                 return -EOPNOTSUPP;
769         }
770
771         return 0;
772 }
773
774 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
775                              struct ieee80211_vif *vif,
776                              struct ieee80211_sta *sta,
777                              struct ieee80211_key_conf *key)
778 {
779         struct wl1251 *wl = hw->priv;
780         struct wl1251_cmd_set_keys *wl_cmd;
781         const u8 *addr;
782         int ret;
783
784         static const u8 bcast_addr[ETH_ALEN] =
785                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
786
787         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
788
789         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
790         if (!wl_cmd) {
791                 ret = -ENOMEM;
792                 goto out;
793         }
794
795         addr = sta ? sta->addr : bcast_addr;
796
797         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
798         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
799         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
800                      key->cipher, key->keyidx, key->keylen, key->flags);
801         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
802
803         if (is_zero_ether_addr(addr)) {
804                 /* We dont support TX only encryption */
805                 ret = -EOPNOTSUPP;
806                 goto out;
807         }
808
809         mutex_lock(&wl->mutex);
810
811         ret = wl1251_ps_elp_wakeup(wl);
812         if (ret < 0)
813                 goto out_unlock;
814
815         switch (cmd) {
816         case SET_KEY:
817                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
818                 break;
819         case DISABLE_KEY:
820                 wl_cmd->key_action = KEY_REMOVE;
821                 break;
822         default:
823                 wl1251_error("Unsupported key cmd 0x%x", cmd);
824                 break;
825         }
826
827         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
828         if (ret < 0) {
829                 wl1251_error("Set KEY type failed");
830                 goto out_sleep;
831         }
832
833         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
834                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
835
836         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
837             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
838                 /*
839                  * We get the key in the following form:
840                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
841                  * but the target is expecting:
842                  * TKIP - RX MIC - TX MIC
843                  */
844                 memcpy(wl_cmd->key, key->key, 16);
845                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
846                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
847
848         } else {
849                 memcpy(wl_cmd->key, key->key, key->keylen);
850         }
851         wl_cmd->key_size = key->keylen;
852
853         wl_cmd->id = key->keyidx;
854         wl_cmd->ssid_profile = 0;
855
856         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
857
858         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
859         if (ret < 0) {
860                 wl1251_warning("could not set keys");
861                 goto out_sleep;
862         }
863
864 out_sleep:
865         wl1251_ps_elp_sleep(wl);
866
867 out_unlock:
868         mutex_unlock(&wl->mutex);
869
870 out:
871         kfree(wl_cmd);
872
873         return ret;
874 }
875
876 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
877                              struct ieee80211_vif *vif,
878                              struct cfg80211_scan_request *req)
879 {
880         struct wl1251 *wl = hw->priv;
881         struct sk_buff *skb;
882         size_t ssid_len = 0;
883         u8 *ssid = NULL;
884         int ret;
885
886         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
887
888         if (req->n_ssids) {
889                 ssid = req->ssids[0].ssid;
890                 ssid_len = req->ssids[0].ssid_len;
891         }
892
893         mutex_lock(&wl->mutex);
894
895         if (wl->scanning) {
896                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
897                 ret = -EINVAL;
898                 goto out;
899         }
900
901         ret = wl1251_ps_elp_wakeup(wl);
902         if (ret < 0)
903                 goto out;
904
905         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
906                                      req->ie, req->ie_len);
907         if (!skb) {
908                 ret = -ENOMEM;
909                 goto out;
910         }
911
912         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
913                                       skb->len);
914         dev_kfree_skb(skb);
915         if (ret < 0)
916                 goto out_sleep;
917
918         ret = wl1251_cmd_trigger_scan_to(wl, 0);
919         if (ret < 0)
920                 goto out_sleep;
921
922         wl->scanning = true;
923
924         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
925                               req->n_channels, WL1251_SCAN_NUM_PROBES);
926         if (ret < 0) {
927                 wl->scanning = false;
928                 goto out_sleep;
929         }
930
931 out_sleep:
932         wl1251_ps_elp_sleep(wl);
933
934 out:
935         mutex_unlock(&wl->mutex);
936
937         return ret;
938 }
939
940 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
941 {
942         struct wl1251 *wl = hw->priv;
943         int ret;
944
945         mutex_lock(&wl->mutex);
946
947         ret = wl1251_ps_elp_wakeup(wl);
948         if (ret < 0)
949                 goto out;
950
951         ret = wl1251_acx_rts_threshold(wl, (u16) value);
952         if (ret < 0)
953                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
954
955         wl1251_ps_elp_sleep(wl);
956
957 out:
958         mutex_unlock(&wl->mutex);
959
960         return ret;
961 }
962
963 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
964                                        struct ieee80211_vif *vif,
965                                        struct ieee80211_bss_conf *bss_conf,
966                                        u32 changed)
967 {
968         struct wl1251 *wl = hw->priv;
969         struct sk_buff *beacon, *skb;
970         int ret;
971
972         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
973
974         mutex_lock(&wl->mutex);
975
976         ret = wl1251_ps_elp_wakeup(wl);
977         if (ret < 0)
978                 goto out;
979
980         if (changed & BSS_CHANGED_CQM) {
981                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
982                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
983                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
984                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
985                 if (ret < 0)
986                         goto out;
987                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
988         }
989
990         if (changed & BSS_CHANGED_BSSID) {
991                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
992
993                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
994                 if (!skb)
995                         goto out_sleep;
996
997                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
998                                               skb->data, skb->len);
999                 dev_kfree_skb(skb);
1000                 if (ret < 0)
1001                         goto out_sleep;
1002
1003                 ret = wl1251_build_qos_null_data(wl);
1004                 if (ret < 0)
1005                         goto out;
1006
1007                 if (wl->bss_type != BSS_TYPE_IBSS) {
1008                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
1009                                           wl->beacon_int, wl->dtim_period);
1010                         if (ret < 0)
1011                                 goto out_sleep;
1012                 }
1013         }
1014
1015         if (changed & BSS_CHANGED_ASSOC) {
1016                 if (bss_conf->assoc) {
1017                         wl->beacon_int = bss_conf->beacon_int;
1018
1019                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1020                         if (!skb)
1021                                 goto out_sleep;
1022
1023                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1024                                                       skb->data,
1025                                                       skb->len);
1026                         dev_kfree_skb(skb);
1027                         if (ret < 0)
1028                                 goto out_sleep;
1029
1030                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1031                         if (ret < 0)
1032                                 goto out_sleep;
1033                 } else {
1034                         /* use defaults when not associated */
1035                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1036                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1037                 }
1038         }
1039         if (changed & BSS_CHANGED_ERP_SLOT) {
1040                 if (bss_conf->use_short_slot)
1041                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1042                 else
1043                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1044                 if (ret < 0) {
1045                         wl1251_warning("Set slot time failed %d", ret);
1046                         goto out_sleep;
1047                 }
1048         }
1049
1050         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1051                 if (bss_conf->use_short_preamble)
1052                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1053                 else
1054                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1055         }
1056
1057         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1058                 if (bss_conf->use_cts_prot)
1059                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1060                 else
1061                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1062                 if (ret < 0) {
1063                         wl1251_warning("Set ctsprotect failed %d", ret);
1064                         goto out_sleep;
1065                 }
1066         }
1067
1068         if (changed & BSS_CHANGED_BEACON) {
1069                 beacon = ieee80211_beacon_get(hw, vif);
1070                 if (!beacon)
1071                         goto out_sleep;
1072
1073                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1074                                               beacon->len);
1075
1076                 if (ret < 0) {
1077                         dev_kfree_skb(beacon);
1078                         goto out_sleep;
1079                 }
1080
1081                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1082                                               beacon->len);
1083
1084                 dev_kfree_skb(beacon);
1085
1086                 if (ret < 0)
1087                         goto out_sleep;
1088
1089                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1090                                   wl->channel, wl->dtim_period);
1091
1092                 if (ret < 0)
1093                         goto out_sleep;
1094         }
1095
1096 out_sleep:
1097         wl1251_ps_elp_sleep(wl);
1098
1099 out:
1100         mutex_unlock(&wl->mutex);
1101 }
1102
1103
1104 /* can't be const, mac80211 writes to this */
1105 static struct ieee80211_rate wl1251_rates[] = {
1106         { .bitrate = 10,
1107           .hw_value = 0x1,
1108           .hw_value_short = 0x1, },
1109         { .bitrate = 20,
1110           .hw_value = 0x2,
1111           .hw_value_short = 0x2,
1112           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1113         { .bitrate = 55,
1114           .hw_value = 0x4,
1115           .hw_value_short = 0x4,
1116           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1117         { .bitrate = 110,
1118           .hw_value = 0x20,
1119           .hw_value_short = 0x20,
1120           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1121         { .bitrate = 60,
1122           .hw_value = 0x8,
1123           .hw_value_short = 0x8, },
1124         { .bitrate = 90,
1125           .hw_value = 0x10,
1126           .hw_value_short = 0x10, },
1127         { .bitrate = 120,
1128           .hw_value = 0x40,
1129           .hw_value_short = 0x40, },
1130         { .bitrate = 180,
1131           .hw_value = 0x80,
1132           .hw_value_short = 0x80, },
1133         { .bitrate = 240,
1134           .hw_value = 0x200,
1135           .hw_value_short = 0x200, },
1136         { .bitrate = 360,
1137          .hw_value = 0x400,
1138          .hw_value_short = 0x400, },
1139         { .bitrate = 480,
1140           .hw_value = 0x800,
1141           .hw_value_short = 0x800, },
1142         { .bitrate = 540,
1143           .hw_value = 0x1000,
1144           .hw_value_short = 0x1000, },
1145 };
1146
1147 /* can't be const, mac80211 writes to this */
1148 static struct ieee80211_channel wl1251_channels[] = {
1149         { .hw_value = 1, .center_freq = 2412},
1150         { .hw_value = 2, .center_freq = 2417},
1151         { .hw_value = 3, .center_freq = 2422},
1152         { .hw_value = 4, .center_freq = 2427},
1153         { .hw_value = 5, .center_freq = 2432},
1154         { .hw_value = 6, .center_freq = 2437},
1155         { .hw_value = 7, .center_freq = 2442},
1156         { .hw_value = 8, .center_freq = 2447},
1157         { .hw_value = 9, .center_freq = 2452},
1158         { .hw_value = 10, .center_freq = 2457},
1159         { .hw_value = 11, .center_freq = 2462},
1160         { .hw_value = 12, .center_freq = 2467},
1161         { .hw_value = 13, .center_freq = 2472},
1162 };
1163
1164 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1165                              struct ieee80211_vif *vif, u16 queue,
1166                              const struct ieee80211_tx_queue_params *params)
1167 {
1168         enum wl1251_acx_ps_scheme ps_scheme;
1169         struct wl1251 *wl = hw->priv;
1170         int ret;
1171
1172         mutex_lock(&wl->mutex);
1173
1174         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1175
1176         ret = wl1251_ps_elp_wakeup(wl);
1177         if (ret < 0)
1178                 goto out;
1179
1180         /* mac80211 uses units of 32 usec */
1181         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1182                                 params->cw_min, params->cw_max,
1183                                 params->aifs, params->txop * 32);
1184         if (ret < 0)
1185                 goto out_sleep;
1186
1187         if (params->uapsd)
1188                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1189         else
1190                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1191
1192         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1193                                  CHANNEL_TYPE_EDCF,
1194                                  wl1251_tx_get_queue(queue), ps_scheme,
1195                                  WL1251_ACX_ACK_POLICY_LEGACY);
1196         if (ret < 0)
1197                 goto out_sleep;
1198
1199 out_sleep:
1200         wl1251_ps_elp_sleep(wl);
1201
1202 out:
1203         mutex_unlock(&wl->mutex);
1204
1205         return ret;
1206 }
1207
1208 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1209                                 struct survey_info *survey)
1210 {
1211         struct wl1251 *wl = hw->priv;
1212         struct ieee80211_conf *conf = &hw->conf;
1213  
1214         if (idx != 0)
1215                 return -ENOENT;
1216  
1217         survey->channel = conf->channel;
1218         survey->filled = SURVEY_INFO_NOISE_DBM;
1219         survey->noise = wl->noise;
1220  
1221         return 0;
1222 }
1223
1224 /* can't be const, mac80211 writes to this */
1225 static struct ieee80211_supported_band wl1251_band_2ghz = {
1226         .channels = wl1251_channels,
1227         .n_channels = ARRAY_SIZE(wl1251_channels),
1228         .bitrates = wl1251_rates,
1229         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1230 };
1231
1232 static const struct ieee80211_ops wl1251_ops = {
1233         .start = wl1251_op_start,
1234         .stop = wl1251_op_stop,
1235         .add_interface = wl1251_op_add_interface,
1236         .remove_interface = wl1251_op_remove_interface,
1237         .config = wl1251_op_config,
1238         .configure_filter = wl1251_op_configure_filter,
1239         .tx = wl1251_op_tx,
1240         .set_key = wl1251_op_set_key,
1241         .hw_scan = wl1251_op_hw_scan,
1242         .bss_info_changed = wl1251_op_bss_info_changed,
1243         .set_rts_threshold = wl1251_op_set_rts_threshold,
1244         .conf_tx = wl1251_op_conf_tx,
1245         .get_survey = wl1251_op_get_survey,
1246 };
1247
1248 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1249 {
1250         unsigned long timeout;
1251
1252         wl1251_reg_write32(wl, EE_ADDR, offset);
1253         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1254
1255         /* EE_CTL_READ clears when data is ready */
1256         timeout = jiffies + msecs_to_jiffies(100);
1257         while (1) {
1258                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1259                         break;
1260
1261                 if (time_after(jiffies, timeout))
1262                         return -ETIMEDOUT;
1263
1264                 msleep(1);
1265         }
1266
1267         *data = wl1251_reg_read32(wl, EE_DATA);
1268         return 0;
1269 }
1270
1271 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1272                               u8 *data, size_t len)
1273 {
1274         size_t i;
1275         int ret;
1276
1277         wl1251_reg_write32(wl, EE_START, 0);
1278
1279         for (i = 0; i < len; i++) {
1280                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1281                 if (ret < 0)
1282                         return ret;
1283         }
1284
1285         return 0;
1286 }
1287
1288 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1289 {
1290         u8 mac[ETH_ALEN];
1291         int i, ret;
1292
1293         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1294
1295         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1296         if (ret < 0) {
1297                 wl1251_warning("failed to read MAC address from EEPROM");
1298                 return ret;
1299         }
1300
1301         /* MAC is stored in reverse order */
1302         for (i = 0; i < ETH_ALEN; i++)
1303                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1304
1305         return 0;
1306 }
1307
1308 static int wl1251_register_hw(struct wl1251 *wl)
1309 {
1310         int ret;
1311
1312         if (wl->mac80211_registered)
1313                 return 0;
1314
1315         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1316
1317         ret = ieee80211_register_hw(wl->hw);
1318         if (ret < 0) {
1319                 wl1251_error("unable to register mac80211 hw: %d", ret);
1320                 return ret;
1321         }
1322
1323         wl->mac80211_registered = true;
1324
1325         wl1251_notice("loaded");
1326
1327         return 0;
1328 }
1329
1330 int wl1251_init_ieee80211(struct wl1251 *wl)
1331 {
1332         int ret;
1333
1334         /* The tx descriptor buffer and the TKIP space */
1335         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1336                 + WL1251_TKIP_IV_SPACE;
1337
1338         /* unit us */
1339         /* FIXME: find a proper value */
1340         wl->hw->channel_change_time = 10000;
1341
1342         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1343                 IEEE80211_HW_SUPPORTS_PS |
1344                 IEEE80211_HW_SUPPORTS_UAPSD;
1345
1346         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1347                                          BIT(NL80211_IFTYPE_ADHOC);
1348         wl->hw->wiphy->max_scan_ssids = 1;
1349         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1350
1351         wl->hw->queues = 4;
1352
1353         if (wl->use_eeprom)
1354                 wl1251_read_eeprom_mac(wl);
1355
1356         ret = wl1251_register_hw(wl);
1357         if (ret)
1358                 goto out;
1359
1360         wl1251_debugfs_init(wl);
1361         wl1251_notice("initialized");
1362
1363         ret = 0;
1364
1365 out:
1366         return ret;
1367 }
1368 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1369
1370 struct ieee80211_hw *wl1251_alloc_hw(void)
1371 {
1372         struct ieee80211_hw *hw;
1373         struct wl1251 *wl;
1374         int i;
1375         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1376
1377         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1378         if (!hw) {
1379                 wl1251_error("could not alloc ieee80211_hw");
1380                 return ERR_PTR(-ENOMEM);
1381         }
1382
1383         wl = hw->priv;
1384         memset(wl, 0, sizeof(*wl));
1385
1386         wl->hw = hw;
1387
1388         wl->data_in_count = 0;
1389
1390         skb_queue_head_init(&wl->tx_queue);
1391
1392         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1393         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1394         wl->channel = WL1251_DEFAULT_CHANNEL;
1395         wl->scanning = false;
1396         wl->default_key = 0;
1397         wl->listen_int = 1;
1398         wl->rx_counter = 0;
1399         wl->rx_handled = 0;
1400         wl->rx_current_buffer = 0;
1401         wl->rx_last_id = 0;
1402         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1403         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1404         wl->elp = false;
1405         wl->station_mode = STATION_ACTIVE_MODE;
1406         wl->psm_requested = false;
1407         wl->tx_queue_stopped = false;
1408         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1409         wl->rssi_thold = 0;
1410         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1411         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1412         wl->vif = NULL;
1413
1414         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1415                 wl->tx_frames[i] = NULL;
1416
1417         wl->next_tx_complete = 0;
1418
1419         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1420         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1421
1422         /*
1423          * In case our MAC address is not correctly set,
1424          * we use a random but Nokia MAC.
1425          */
1426         memcpy(wl->mac_addr, nokia_oui, 3);
1427         get_random_bytes(wl->mac_addr + 3, 3);
1428
1429         wl->state = WL1251_STATE_OFF;
1430         mutex_init(&wl->mutex);
1431
1432         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1433         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1434
1435         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1436         if (!wl->rx_descriptor) {
1437                 wl1251_error("could not allocate memory for rx descriptor");
1438                 ieee80211_free_hw(hw);
1439                 return ERR_PTR(-ENOMEM);
1440         }
1441
1442         return hw;
1443 }
1444 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1445
1446 int wl1251_free_hw(struct wl1251 *wl)
1447 {
1448         ieee80211_unregister_hw(wl->hw);
1449
1450         wl1251_debugfs_exit(wl);
1451
1452         kfree(wl->target_mem_map);
1453         kfree(wl->data_path);
1454         vfree(wl->fw);
1455         wl->fw = NULL;
1456         kfree(wl->nvs);
1457         wl->nvs = NULL;
1458
1459         kfree(wl->rx_descriptor);
1460         wl->rx_descriptor = NULL;
1461
1462         ieee80211_free_hw(wl->hw);
1463
1464         return 0;
1465 }
1466 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1467
1468 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1469 MODULE_LICENSE("GPL");
1470 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1471 MODULE_FIRMWARE(WL1251_FW_NAME);