cd487f6a3eae42b67c8b7bef776286ca392296c7
[pandora-kernel.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          * Join command applies filters, and if we are not associated,
339          * BSSID filter must be disabled for association to work.
340          */
341         if (is_zero_ether_addr(wl->bssid))
342                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
343
344         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
345                               dtim_period);
346         if (ret < 0)
347                 goto out;
348
349         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
350         if (ret < 0)
351                 wl1251_warning("join timeout");
352
353 out:
354         return ret;
355 }
356
357 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
358 {
359         struct wl1251 *wl = hw->priv;
360         unsigned long flags;
361
362         skb_queue_tail(&wl->tx_queue, skb);
363
364         /*
365          * The chip specific setup must run before the first TX packet -
366          * before that, the tx_work will not be initialized!
367          */
368
369         ieee80211_queue_work(wl->hw, &wl->tx_work);
370
371         /*
372          * The workqueue is slow to process the tx_queue and we need stop
373          * the queue here, otherwise the queue will get too long.
374          */
375         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
376                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
377
378                 spin_lock_irqsave(&wl->wl_lock, flags);
379                 ieee80211_stop_queues(wl->hw);
380                 wl->tx_queue_stopped = true;
381                 spin_unlock_irqrestore(&wl->wl_lock, flags);
382         }
383 }
384
385 static int wl1251_op_start(struct ieee80211_hw *hw)
386 {
387         struct wl1251 *wl = hw->priv;
388         struct wiphy *wiphy = hw->wiphy;
389         int ret = 0;
390
391         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
392
393         mutex_lock(&wl->mutex);
394
395         if (wl->state != WL1251_STATE_OFF) {
396                 wl1251_error("cannot start because not in off state: %d",
397                              wl->state);
398                 ret = -EBUSY;
399                 goto out;
400         }
401
402         ret = wl1251_chip_wakeup(wl);
403         if (ret < 0)
404                 goto out;
405
406         ret = wl1251_boot(wl);
407         if (ret < 0)
408                 goto out;
409
410         ret = wl1251_hw_init(wl);
411         if (ret < 0)
412                 goto out;
413
414         ret = wl1251_acx_station_id(wl);
415         if (ret < 0)
416                 goto out;
417
418         wl->state = WL1251_STATE_ON;
419
420         wl1251_info("firmware booted (%s)", wl->fw_ver);
421
422         /* update hw/fw version info in wiphy struct */
423         wiphy->hw_version = wl->chip_id;
424         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
425
426 out:
427         if (ret < 0)
428                 wl1251_power_off(wl);
429
430         mutex_unlock(&wl->mutex);
431
432         return ret;
433 }
434
435 static void wl1251_op_stop(struct ieee80211_hw *hw)
436 {
437         struct wl1251 *wl = hw->priv;
438
439         wl1251_info("down");
440
441         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
442
443         mutex_lock(&wl->mutex);
444
445         WARN_ON(wl->state != WL1251_STATE_ON);
446
447         if (wl->scanning) {
448                 ieee80211_scan_completed(wl->hw, true);
449                 wl->scanning = false;
450         }
451
452         wl->state = WL1251_STATE_OFF;
453
454         wl1251_disable_interrupts(wl);
455
456         mutex_unlock(&wl->mutex);
457
458         cancel_work_sync(&wl->irq_work);
459         cancel_work_sync(&wl->tx_work);
460         cancel_delayed_work_sync(&wl->elp_work);
461
462         mutex_lock(&wl->mutex);
463
464         /* let's notify MAC80211 about the remaining pending TX frames */
465         wl1251_tx_flush(wl);
466         wl1251_power_off(wl);
467
468         memset(wl->bssid, 0, ETH_ALEN);
469         wl->listen_int = 1;
470         wl->bss_type = MAX_BSS_TYPE;
471
472         wl->data_in_count = 0;
473         wl->rx_counter = 0;
474         wl->rx_handled = 0;
475         wl->rx_current_buffer = 0;
476         wl->rx_last_id = 0;
477         wl->next_tx_complete = 0;
478         wl->elp = false;
479         wl->station_mode = STATION_ACTIVE_MODE;
480         wl->tx_queue_stopped = false;
481         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
482         wl->rssi_thold = 0;
483         wl->channel = WL1251_DEFAULT_CHANNEL;
484
485         wl1251_debugfs_reset(wl);
486
487         mutex_unlock(&wl->mutex);
488 }
489
490 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
491                                    struct ieee80211_vif *vif)
492 {
493         struct wl1251 *wl = hw->priv;
494         int ret = 0;
495
496         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
497                      vif->type, vif->addr);
498
499         mutex_lock(&wl->mutex);
500         if (wl->vif) {
501                 ret = -EBUSY;
502                 goto out;
503         }
504
505         wl->vif = vif;
506
507         switch (vif->type) {
508         case NL80211_IFTYPE_STATION:
509                 wl->bss_type = BSS_TYPE_STA_BSS;
510                 break;
511         case NL80211_IFTYPE_ADHOC:
512                 wl->bss_type = BSS_TYPE_IBSS;
513                 break;
514         default:
515                 ret = -EOPNOTSUPP;
516                 goto out;
517         }
518
519         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
520                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
521                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
522                 ret = wl1251_acx_station_id(wl);
523                 if (ret < 0)
524                         goto out;
525         }
526
527 out:
528         mutex_unlock(&wl->mutex);
529         return ret;
530 }
531
532 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
533                                          struct ieee80211_vif *vif)
534 {
535         struct wl1251 *wl = hw->priv;
536
537         mutex_lock(&wl->mutex);
538         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
539         wl->vif = NULL;
540         mutex_unlock(&wl->mutex);
541 }
542
543 static int wl1251_build_qos_null_data(struct wl1251 *wl)
544 {
545         struct ieee80211_qos_hdr template;
546
547         memset(&template, 0, sizeof(template));
548
549         memcpy(template.addr1, wl->bssid, ETH_ALEN);
550         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
551         memcpy(template.addr3, wl->bssid, ETH_ALEN);
552
553         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
554                                              IEEE80211_STYPE_QOS_NULLFUNC |
555                                              IEEE80211_FCTL_TODS);
556
557         /* FIXME: not sure what priority to use here */
558         template.qos_ctrl = cpu_to_le16(0);
559
560         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
561                                        sizeof(template));
562 }
563
564 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
565 {
566         struct wl1251 *wl = hw->priv;
567         struct ieee80211_conf *conf = &hw->conf;
568         int channel, ret = 0;
569
570         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
571
572         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
573                      channel,
574                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
575                      conf->power_level);
576
577         mutex_lock(&wl->mutex);
578
579         ret = wl1251_ps_elp_wakeup(wl);
580         if (ret < 0)
581                 goto out;
582
583         if (channel != wl->channel) {
584                 wl->channel = channel;
585
586                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
587                                   wl->beacon_int, wl->dtim_period);
588                 if (ret < 0)
589                         goto out_sleep;
590         }
591
592         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
593                 wl1251_debug(DEBUG_PSM, "psm enabled");
594
595                 wl->psm_requested = true;
596
597                 wl->dtim_period = conf->ps_dtim_period;
598
599                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
600                                                   wl->dtim_period);
601
602                 /*
603                  * mac80211 enables PSM only if we're already associated.
604                  */
605                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
606                 if (ret < 0)
607                         goto out_sleep;
608         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
609                    wl->psm_requested) {
610                 wl1251_debug(DEBUG_PSM, "psm disabled");
611
612                 wl->psm_requested = false;
613
614                 if (wl->station_mode != STATION_ACTIVE_MODE) {
615                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
616                         if (ret < 0)
617                                 goto out_sleep;
618                 }
619         }
620
621         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
622                 if (conf->flags & IEEE80211_CONF_IDLE) {
623                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
624                         if (ret < 0)
625                                 goto out_sleep;
626                 } else {
627                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
628                         if (ret < 0)
629                                 goto out_sleep;
630                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
631                                           wl->beacon_int, wl->dtim_period);
632                         if (ret < 0)
633                                 goto out_sleep;
634                 }
635         }
636
637         if (conf->power_level != wl->power_level) {
638                 ret = wl1251_acx_tx_power(wl, conf->power_level);
639                 if (ret < 0)
640                         goto out_sleep;
641
642                 wl->power_level = conf->power_level;
643         }
644
645 out_sleep:
646         wl1251_ps_elp_sleep(wl);
647
648 out:
649         mutex_unlock(&wl->mutex);
650
651         return ret;
652 }
653
654 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
655                                   FIF_ALLMULTI | \
656                                   FIF_FCSFAIL | \
657                                   FIF_BCN_PRBRESP_PROMISC | \
658                                   FIF_CONTROL | \
659                                   FIF_OTHER_BSS | \
660                                   FIF_PROBE_REQ)
661
662 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
663                                        unsigned int changed,
664                                        unsigned int *total,u64 multicast)
665 {
666         struct wl1251 *wl = hw->priv;
667         int ret;
668
669         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
670
671         *total &= WL1251_SUPPORTED_FILTERS;
672         changed &= WL1251_SUPPORTED_FILTERS;
673
674         if (changed == 0)
675                 /* no filters which we support changed */
676                 return;
677
678         mutex_lock(&wl->mutex);
679
680         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
681         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
682
683         if (*total & FIF_PROMISC_IN_BSS) {
684                 wl->rx_config |= CFG_BSSID_FILTER_EN;
685                 wl->rx_config |= CFG_RX_ALL_GOOD;
686         }
687         if (*total & FIF_ALLMULTI)
688                 /*
689                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
690                  * all multicast frames
691                  */
692                 wl->rx_config &= ~CFG_MC_FILTER_EN;
693         if (*total & FIF_FCSFAIL)
694                 wl->rx_filter |= CFG_RX_FCS_ERROR;
695         if (*total & FIF_BCN_PRBRESP_PROMISC) {
696                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
697                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
698         }
699         if (*total & FIF_CONTROL)
700                 wl->rx_filter |= CFG_RX_CTL_EN;
701         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
702                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
703         if (*total & FIF_PROBE_REQ)
704                 wl->rx_filter |= CFG_RX_PREQ_EN;
705
706         if (wl->state == WL1251_STATE_OFF)
707                 goto out;
708
709         ret = wl1251_ps_elp_wakeup(wl);
710         if (ret < 0)
711                 goto out;
712
713         /* send filters to firmware */
714         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
715
716         wl1251_ps_elp_sleep(wl);
717
718 out:
719         mutex_unlock(&wl->mutex);
720 }
721
722 /* HW encryption */
723 static int wl1251_set_key_type(struct wl1251 *wl,
724                                struct wl1251_cmd_set_keys *key,
725                                enum set_key_cmd cmd,
726                                struct ieee80211_key_conf *mac80211_key,
727                                const u8 *addr)
728 {
729         switch (mac80211_key->cipher) {
730         case WLAN_CIPHER_SUITE_WEP40:
731         case WLAN_CIPHER_SUITE_WEP104:
732                 if (is_broadcast_ether_addr(addr))
733                         key->key_type = KEY_WEP_DEFAULT;
734                 else
735                         key->key_type = KEY_WEP_ADDR;
736
737                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
738                 break;
739         case WLAN_CIPHER_SUITE_TKIP:
740                 if (is_broadcast_ether_addr(addr))
741                         key->key_type = KEY_TKIP_MIC_GROUP;
742                 else
743                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
744
745                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
746                 break;
747         case WLAN_CIPHER_SUITE_CCMP:
748                 if (is_broadcast_ether_addr(addr))
749                         key->key_type = KEY_AES_GROUP;
750                 else
751                         key->key_type = KEY_AES_PAIRWISE;
752                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
753                 break;
754         default:
755                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
756                 return -EOPNOTSUPP;
757         }
758
759         return 0;
760 }
761
762 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
763                              struct ieee80211_vif *vif,
764                              struct ieee80211_sta *sta,
765                              struct ieee80211_key_conf *key)
766 {
767         struct wl1251 *wl = hw->priv;
768         struct wl1251_cmd_set_keys *wl_cmd;
769         const u8 *addr;
770         int ret;
771
772         static const u8 bcast_addr[ETH_ALEN] =
773                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
774
775         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
776
777         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
778         if (!wl_cmd) {
779                 ret = -ENOMEM;
780                 goto out;
781         }
782
783         addr = sta ? sta->addr : bcast_addr;
784
785         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
786         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
787         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
788                      key->cipher, key->keyidx, key->keylen, key->flags);
789         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
790
791         if (is_zero_ether_addr(addr)) {
792                 /* We dont support TX only encryption */
793                 ret = -EOPNOTSUPP;
794                 goto out;
795         }
796
797         mutex_lock(&wl->mutex);
798
799         ret = wl1251_ps_elp_wakeup(wl);
800         if (ret < 0)
801                 goto out_unlock;
802
803         switch (cmd) {
804         case SET_KEY:
805                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
806                 break;
807         case DISABLE_KEY:
808                 wl_cmd->key_action = KEY_REMOVE;
809                 break;
810         default:
811                 wl1251_error("Unsupported key cmd 0x%x", cmd);
812                 break;
813         }
814
815         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
816         if (ret < 0) {
817                 wl1251_error("Set KEY type failed");
818                 goto out_sleep;
819         }
820
821         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
822                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
823
824         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
825             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
826                 /*
827                  * We get the key in the following form:
828                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
829                  * but the target is expecting:
830                  * TKIP - RX MIC - TX MIC
831                  */
832                 memcpy(wl_cmd->key, key->key, 16);
833                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
834                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
835
836         } else {
837                 memcpy(wl_cmd->key, key->key, key->keylen);
838         }
839         wl_cmd->key_size = key->keylen;
840
841         wl_cmd->id = key->keyidx;
842         wl_cmd->ssid_profile = 0;
843
844         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
845
846         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
847         if (ret < 0) {
848                 wl1251_warning("could not set keys");
849                 goto out_sleep;
850         }
851
852 out_sleep:
853         wl1251_ps_elp_sleep(wl);
854
855 out_unlock:
856         mutex_unlock(&wl->mutex);
857
858 out:
859         kfree(wl_cmd);
860
861         return ret;
862 }
863
864 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
865                              struct ieee80211_vif *vif,
866                              struct cfg80211_scan_request *req)
867 {
868         struct wl1251 *wl = hw->priv;
869         struct sk_buff *skb;
870         size_t ssid_len = 0;
871         u8 *ssid = NULL;
872         int ret;
873
874         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
875
876         if (req->n_ssids) {
877                 ssid = req->ssids[0].ssid;
878                 ssid_len = req->ssids[0].ssid_len;
879         }
880
881         mutex_lock(&wl->mutex);
882
883         if (wl->scanning) {
884                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
885                 ret = -EINVAL;
886                 goto out;
887         }
888
889         ret = wl1251_ps_elp_wakeup(wl);
890         if (ret < 0)
891                 goto out;
892
893         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
894                                      req->ie, req->ie_len);
895         if (!skb) {
896                 ret = -ENOMEM;
897                 goto out;
898         }
899
900         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
901                                       skb->len);
902         dev_kfree_skb(skb);
903         if (ret < 0)
904                 goto out_sleep;
905
906         ret = wl1251_cmd_trigger_scan_to(wl, 0);
907         if (ret < 0)
908                 goto out_sleep;
909
910         wl->scanning = true;
911
912         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
913                               req->n_channels, WL1251_SCAN_NUM_PROBES);
914         if (ret < 0) {
915                 wl->scanning = false;
916                 goto out_sleep;
917         }
918
919 out_sleep:
920         wl1251_ps_elp_sleep(wl);
921
922 out:
923         mutex_unlock(&wl->mutex);
924
925         return ret;
926 }
927
928 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
929 {
930         struct wl1251 *wl = hw->priv;
931         int ret;
932
933         mutex_lock(&wl->mutex);
934
935         ret = wl1251_ps_elp_wakeup(wl);
936         if (ret < 0)
937                 goto out;
938
939         ret = wl1251_acx_rts_threshold(wl, (u16) value);
940         if (ret < 0)
941                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
942
943         wl1251_ps_elp_sleep(wl);
944
945 out:
946         mutex_unlock(&wl->mutex);
947
948         return ret;
949 }
950
951 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
952                                        struct ieee80211_vif *vif,
953                                        struct ieee80211_bss_conf *bss_conf,
954                                        u32 changed)
955 {
956         struct wl1251 *wl = hw->priv;
957         struct sk_buff *beacon, *skb;
958         int ret;
959
960         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
961
962         mutex_lock(&wl->mutex);
963
964         ret = wl1251_ps_elp_wakeup(wl);
965         if (ret < 0)
966                 goto out;
967
968         if (changed & BSS_CHANGED_CQM) {
969                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
970                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
971                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
972                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
973                 if (ret < 0)
974                         goto out;
975                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
976         }
977
978         if (changed & BSS_CHANGED_BSSID) {
979                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
980
981                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
982                 if (!skb)
983                         goto out_sleep;
984
985                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
986                                               skb->data, skb->len);
987                 dev_kfree_skb(skb);
988                 if (ret < 0)
989                         goto out_sleep;
990
991                 ret = wl1251_build_qos_null_data(wl);
992                 if (ret < 0)
993                         goto out;
994
995                 if (wl->bss_type != BSS_TYPE_IBSS) {
996                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
997                                           wl->beacon_int, wl->dtim_period);
998                         if (ret < 0)
999                                 goto out_sleep;
1000                 }
1001         }
1002
1003         if (changed & BSS_CHANGED_ASSOC) {
1004                 if (bss_conf->assoc) {
1005                         wl->beacon_int = bss_conf->beacon_int;
1006
1007                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1008                         if (!skb)
1009                                 goto out_sleep;
1010
1011                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1012                                                       skb->data,
1013                                                       skb->len);
1014                         dev_kfree_skb(skb);
1015                         if (ret < 0)
1016                                 goto out_sleep;
1017
1018                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1019                         if (ret < 0)
1020                                 goto out_sleep;
1021                 } else {
1022                         /* use defaults when not associated */
1023                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1024                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1025                 }
1026         }
1027         if (changed & BSS_CHANGED_ERP_SLOT) {
1028                 if (bss_conf->use_short_slot)
1029                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1030                 else
1031                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1032                 if (ret < 0) {
1033                         wl1251_warning("Set slot time failed %d", ret);
1034                         goto out_sleep;
1035                 }
1036         }
1037
1038         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1039                 if (bss_conf->use_short_preamble)
1040                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1041                 else
1042                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1043         }
1044
1045         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1046                 if (bss_conf->use_cts_prot)
1047                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1048                 else
1049                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1050                 if (ret < 0) {
1051                         wl1251_warning("Set ctsprotect failed %d", ret);
1052                         goto out_sleep;
1053                 }
1054         }
1055
1056         if (changed & BSS_CHANGED_BEACON) {
1057                 beacon = ieee80211_beacon_get(hw, vif);
1058                 if (!beacon)
1059                         goto out_sleep;
1060
1061                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1062                                               beacon->len);
1063
1064                 if (ret < 0) {
1065                         dev_kfree_skb(beacon);
1066                         goto out_sleep;
1067                 }
1068
1069                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1070                                               beacon->len);
1071
1072                 dev_kfree_skb(beacon);
1073
1074                 if (ret < 0)
1075                         goto out_sleep;
1076
1077                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1078                                   wl->channel, wl->dtim_period);
1079
1080                 if (ret < 0)
1081                         goto out_sleep;
1082         }
1083
1084 out_sleep:
1085         wl1251_ps_elp_sleep(wl);
1086
1087 out:
1088         mutex_unlock(&wl->mutex);
1089 }
1090
1091
1092 /* can't be const, mac80211 writes to this */
1093 static struct ieee80211_rate wl1251_rates[] = {
1094         { .bitrate = 10,
1095           .hw_value = 0x1,
1096           .hw_value_short = 0x1, },
1097         { .bitrate = 20,
1098           .hw_value = 0x2,
1099           .hw_value_short = 0x2,
1100           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1101         { .bitrate = 55,
1102           .hw_value = 0x4,
1103           .hw_value_short = 0x4,
1104           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1105         { .bitrate = 110,
1106           .hw_value = 0x20,
1107           .hw_value_short = 0x20,
1108           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1109         { .bitrate = 60,
1110           .hw_value = 0x8,
1111           .hw_value_short = 0x8, },
1112         { .bitrate = 90,
1113           .hw_value = 0x10,
1114           .hw_value_short = 0x10, },
1115         { .bitrate = 120,
1116           .hw_value = 0x40,
1117           .hw_value_short = 0x40, },
1118         { .bitrate = 180,
1119           .hw_value = 0x80,
1120           .hw_value_short = 0x80, },
1121         { .bitrate = 240,
1122           .hw_value = 0x200,
1123           .hw_value_short = 0x200, },
1124         { .bitrate = 360,
1125          .hw_value = 0x400,
1126          .hw_value_short = 0x400, },
1127         { .bitrate = 480,
1128           .hw_value = 0x800,
1129           .hw_value_short = 0x800, },
1130         { .bitrate = 540,
1131           .hw_value = 0x1000,
1132           .hw_value_short = 0x1000, },
1133 };
1134
1135 /* can't be const, mac80211 writes to this */
1136 static struct ieee80211_channel wl1251_channels[] = {
1137         { .hw_value = 1, .center_freq = 2412},
1138         { .hw_value = 2, .center_freq = 2417},
1139         { .hw_value = 3, .center_freq = 2422},
1140         { .hw_value = 4, .center_freq = 2427},
1141         { .hw_value = 5, .center_freq = 2432},
1142         { .hw_value = 6, .center_freq = 2437},
1143         { .hw_value = 7, .center_freq = 2442},
1144         { .hw_value = 8, .center_freq = 2447},
1145         { .hw_value = 9, .center_freq = 2452},
1146         { .hw_value = 10, .center_freq = 2457},
1147         { .hw_value = 11, .center_freq = 2462},
1148         { .hw_value = 12, .center_freq = 2467},
1149         { .hw_value = 13, .center_freq = 2472},
1150 };
1151
1152 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1153                              struct ieee80211_vif *vif, u16 queue,
1154                              const struct ieee80211_tx_queue_params *params)
1155 {
1156         enum wl1251_acx_ps_scheme ps_scheme;
1157         struct wl1251 *wl = hw->priv;
1158         int ret;
1159
1160         mutex_lock(&wl->mutex);
1161
1162         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1163
1164         ret = wl1251_ps_elp_wakeup(wl);
1165         if (ret < 0)
1166                 goto out;
1167
1168         /* mac80211 uses units of 32 usec */
1169         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1170                                 params->cw_min, params->cw_max,
1171                                 params->aifs, params->txop * 32);
1172         if (ret < 0)
1173                 goto out_sleep;
1174
1175         if (params->uapsd)
1176                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1177         else
1178                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1179
1180         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1181                                  CHANNEL_TYPE_EDCF,
1182                                  wl1251_tx_get_queue(queue), ps_scheme,
1183                                  WL1251_ACX_ACK_POLICY_LEGACY);
1184         if (ret < 0)
1185                 goto out_sleep;
1186
1187 out_sleep:
1188         wl1251_ps_elp_sleep(wl);
1189
1190 out:
1191         mutex_unlock(&wl->mutex);
1192
1193         return ret;
1194 }
1195
1196 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1197                                 struct survey_info *survey)
1198 {
1199         struct wl1251 *wl = hw->priv;
1200         struct ieee80211_conf *conf = &hw->conf;
1201  
1202         if (idx != 0)
1203                 return -ENOENT;
1204  
1205         survey->channel = conf->channel;
1206         survey->filled = SURVEY_INFO_NOISE_DBM;
1207         survey->noise = wl->noise;
1208  
1209         return 0;
1210 }
1211
1212 /* can't be const, mac80211 writes to this */
1213 static struct ieee80211_supported_band wl1251_band_2ghz = {
1214         .channels = wl1251_channels,
1215         .n_channels = ARRAY_SIZE(wl1251_channels),
1216         .bitrates = wl1251_rates,
1217         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1218 };
1219
1220 static const struct ieee80211_ops wl1251_ops = {
1221         .start = wl1251_op_start,
1222         .stop = wl1251_op_stop,
1223         .add_interface = wl1251_op_add_interface,
1224         .remove_interface = wl1251_op_remove_interface,
1225         .config = wl1251_op_config,
1226         .configure_filter = wl1251_op_configure_filter,
1227         .tx = wl1251_op_tx,
1228         .set_key = wl1251_op_set_key,
1229         .hw_scan = wl1251_op_hw_scan,
1230         .bss_info_changed = wl1251_op_bss_info_changed,
1231         .set_rts_threshold = wl1251_op_set_rts_threshold,
1232         .conf_tx = wl1251_op_conf_tx,
1233         .get_survey = wl1251_op_get_survey,
1234 };
1235
1236 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1237 {
1238         unsigned long timeout;
1239
1240         wl1251_reg_write32(wl, EE_ADDR, offset);
1241         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1242
1243         /* EE_CTL_READ clears when data is ready */
1244         timeout = jiffies + msecs_to_jiffies(100);
1245         while (1) {
1246                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1247                         break;
1248
1249                 if (time_after(jiffies, timeout))
1250                         return -ETIMEDOUT;
1251
1252                 msleep(1);
1253         }
1254
1255         *data = wl1251_reg_read32(wl, EE_DATA);
1256         return 0;
1257 }
1258
1259 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1260                               u8 *data, size_t len)
1261 {
1262         size_t i;
1263         int ret;
1264
1265         wl1251_reg_write32(wl, EE_START, 0);
1266
1267         for (i = 0; i < len; i++) {
1268                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1269                 if (ret < 0)
1270                         return ret;
1271         }
1272
1273         return 0;
1274 }
1275
1276 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1277 {
1278         u8 mac[ETH_ALEN];
1279         int i, ret;
1280
1281         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1282
1283         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1284         if (ret < 0) {
1285                 wl1251_warning("failed to read MAC address from EEPROM");
1286                 return ret;
1287         }
1288
1289         /* MAC is stored in reverse order */
1290         for (i = 0; i < ETH_ALEN; i++)
1291                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1292
1293         return 0;
1294 }
1295
1296 static int wl1251_register_hw(struct wl1251 *wl)
1297 {
1298         int ret;
1299
1300         if (wl->mac80211_registered)
1301                 return 0;
1302
1303         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1304
1305         ret = ieee80211_register_hw(wl->hw);
1306         if (ret < 0) {
1307                 wl1251_error("unable to register mac80211 hw: %d", ret);
1308                 return ret;
1309         }
1310
1311         wl->mac80211_registered = true;
1312
1313         wl1251_notice("loaded");
1314
1315         return 0;
1316 }
1317
1318 int wl1251_init_ieee80211(struct wl1251 *wl)
1319 {
1320         int ret;
1321
1322         /* The tx descriptor buffer and the TKIP space */
1323         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1324                 + WL1251_TKIP_IV_SPACE;
1325
1326         /* unit us */
1327         /* FIXME: find a proper value */
1328         wl->hw->channel_change_time = 10000;
1329
1330         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1331                 IEEE80211_HW_SUPPORTS_PS |
1332                 IEEE80211_HW_BEACON_FILTER |
1333                 IEEE80211_HW_SUPPORTS_UAPSD |
1334                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1335
1336         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1337                                          BIT(NL80211_IFTYPE_ADHOC);
1338         wl->hw->wiphy->max_scan_ssids = 1;
1339         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1340
1341         wl->hw->queues = 4;
1342
1343         if (wl->use_eeprom)
1344                 wl1251_read_eeprom_mac(wl);
1345
1346         ret = wl1251_register_hw(wl);
1347         if (ret)
1348                 goto out;
1349
1350         wl1251_debugfs_init(wl);
1351         wl1251_notice("initialized");
1352
1353         ret = 0;
1354
1355 out:
1356         return ret;
1357 }
1358 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1359
1360 struct ieee80211_hw *wl1251_alloc_hw(void)
1361 {
1362         struct ieee80211_hw *hw;
1363         struct wl1251 *wl;
1364         int i;
1365         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1366
1367         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1368         if (!hw) {
1369                 wl1251_error("could not alloc ieee80211_hw");
1370                 return ERR_PTR(-ENOMEM);
1371         }
1372
1373         wl = hw->priv;
1374         memset(wl, 0, sizeof(*wl));
1375
1376         wl->hw = hw;
1377
1378         wl->data_in_count = 0;
1379
1380         skb_queue_head_init(&wl->tx_queue);
1381
1382         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1383         wl->channel = WL1251_DEFAULT_CHANNEL;
1384         wl->scanning = false;
1385         wl->default_key = 0;
1386         wl->listen_int = 1;
1387         wl->rx_counter = 0;
1388         wl->rx_handled = 0;
1389         wl->rx_current_buffer = 0;
1390         wl->rx_last_id = 0;
1391         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1392         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1393         wl->elp = false;
1394         wl->station_mode = STATION_ACTIVE_MODE;
1395         wl->psm_requested = false;
1396         wl->tx_queue_stopped = false;
1397         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1398         wl->rssi_thold = 0;
1399         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1400         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1401         wl->vif = NULL;
1402
1403         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1404                 wl->tx_frames[i] = NULL;
1405
1406         wl->next_tx_complete = 0;
1407
1408         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1409         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1410
1411         /*
1412          * In case our MAC address is not correctly set,
1413          * we use a random but Nokia MAC.
1414          */
1415         memcpy(wl->mac_addr, nokia_oui, 3);
1416         get_random_bytes(wl->mac_addr + 3, 3);
1417
1418         wl->state = WL1251_STATE_OFF;
1419         mutex_init(&wl->mutex);
1420
1421         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1422         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1423
1424         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1425         if (!wl->rx_descriptor) {
1426                 wl1251_error("could not allocate memory for rx descriptor");
1427                 ieee80211_free_hw(hw);
1428                 return ERR_PTR(-ENOMEM);
1429         }
1430
1431         return hw;
1432 }
1433 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1434
1435 int wl1251_free_hw(struct wl1251 *wl)
1436 {
1437         ieee80211_unregister_hw(wl->hw);
1438
1439         wl1251_debugfs_exit(wl);
1440
1441         kfree(wl->target_mem_map);
1442         kfree(wl->data_path);
1443         vfree(wl->fw);
1444         wl->fw = NULL;
1445         kfree(wl->nvs);
1446         wl->nvs = NULL;
1447
1448         kfree(wl->rx_descriptor);
1449         wl->rx_descriptor = NULL;
1450
1451         ieee80211_free_hw(wl->hw);
1452
1453         return 0;
1454 }
1455 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1456
1457 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1458 MODULE_LICENSE("GPL");
1459 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1460 MODULE_FIRMWARE(WL1251_FW_NAME);