wl1251: change wake_up_conditions config
[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 #include <linux/netdevice.h>
32
33 #include "wl1251.h"
34 #include "wl12xx_80211.h"
35 #include "reg.h"
36 #include "io.h"
37 #include "cmd.h"
38 #include "event.h"
39 #include "tx.h"
40 #include "rx.h"
41 #include "ps.h"
42 #include "init.h"
43 #include "debugfs.h"
44 #include "boot.h"
45
46 void wl1251_enable_interrupts(struct wl1251 *wl)
47 {
48         wl->if_ops->enable_irq(wl);
49 }
50
51 void wl1251_disable_interrupts(struct wl1251 *wl)
52 {
53         wl->if_ops->disable_irq(wl);
54 }
55
56 static int wl1251_power_off(struct wl1251 *wl)
57 {
58         return wl->if_ops->power(wl, false);
59 }
60
61 static int wl1251_power_on(struct wl1251 *wl)
62 {
63         return wl->if_ops->power(wl, true);
64 }
65
66 static int wl1251_fetch_firmware(struct wl1251 *wl)
67 {
68         const struct firmware *fw;
69         struct device *dev = wiphy_dev(wl->hw->wiphy);
70         int ret;
71
72         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
73
74         if (ret < 0) {
75                 wl1251_error("could not get firmware: %d", ret);
76                 return ret;
77         }
78
79         if (fw->size % 4) {
80                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
81                              fw->size);
82                 ret = -EILSEQ;
83                 goto out;
84         }
85
86         wl->fw_len = fw->size;
87         wl->fw = vmalloc(wl->fw_len);
88
89         if (!wl->fw) {
90                 wl1251_error("could not allocate memory for the firmware");
91                 ret = -ENOMEM;
92                 goto out;
93         }
94
95         memcpy(wl->fw, fw->data, wl->fw_len);
96
97         ret = 0;
98
99 out:
100         release_firmware(fw);
101
102         return ret;
103 }
104
105 static int wl1251_fetch_nvs(struct wl1251 *wl)
106 {
107         const struct firmware *fw;
108         struct device *dev = wiphy_dev(wl->hw->wiphy);
109         int ret;
110
111         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
112
113         if (ret < 0) {
114                 wl1251_error("could not get nvs file: %d", ret);
115                 return ret;
116         }
117
118         if (fw->size % 4) {
119                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
120                              fw->size);
121                 ret = -EILSEQ;
122                 goto out;
123         }
124
125         wl->nvs_len = fw->size;
126         wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
127
128         if (!wl->nvs) {
129                 wl1251_error("could not allocate memory for the nvs file");
130                 ret = -ENOMEM;
131                 goto out;
132         }
133
134         ret = 0;
135
136 out:
137         release_firmware(fw);
138
139         return ret;
140 }
141
142 static void wl1251_fw_wakeup(struct wl1251 *wl)
143 {
144         u32 elp_reg;
145
146         elp_reg = ELPCTRL_WAKE_UP;
147         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
148         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
149
150         if (!(elp_reg & ELPCTRL_WLAN_READY))
151                 wl1251_warning("WLAN not ready");
152 }
153
154 static int wl1251_chip_wakeup(struct wl1251 *wl)
155 {
156         int ret;
157
158         ret = wl1251_power_on(wl);
159         if (ret < 0)
160                 return ret;
161
162         msleep(WL1251_POWER_ON_SLEEP);
163         wl->if_ops->reset(wl);
164
165         /* We don't need a real memory partition here, because we only want
166          * to use the registers at this point. */
167         wl1251_set_partition(wl,
168                              0x00000000,
169                              0x00000000,
170                              REGISTERS_BASE,
171                              REGISTERS_DOWN_SIZE);
172
173         /* ELP module wake up */
174         wl1251_fw_wakeup(wl);
175
176         /* whal_FwCtrl_BootSm() */
177
178         /* 0. read chip id from CHIP_ID */
179         wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
180
181         /* 1. check if chip id is valid */
182
183         switch (wl->chip_id) {
184         case CHIP_ID_1251_PG12:
185                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
186                              wl->chip_id);
187                 break;
188         case CHIP_ID_1251_PG11:
189                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
190                              wl->chip_id);
191                 break;
192         case CHIP_ID_1251_PG10:
193         default:
194                 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
195                 ret = -ENODEV;
196                 goto out;
197         }
198
199         if (wl->fw == NULL) {
200                 ret = wl1251_fetch_firmware(wl);
201                 if (ret < 0)
202                         goto out;
203         }
204
205         if (wl->nvs == NULL && !wl->use_eeprom) {
206                 /* No NVS from netlink, try to get it from the filesystem */
207                 ret = wl1251_fetch_nvs(wl);
208                 if (ret < 0)
209                         goto out;
210         }
211
212 out:
213         return ret;
214 }
215
216 #define WL1251_IRQ_LOOP_COUNT 100
217 irqreturn_t wl1251_irq(int irq, void *cookie)
218 {
219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
220         struct wl1251 *wl = cookie;
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                 while (skb_queue_len(&wl->tx_queue) > 0
312                        && wl1251_tx_path_status(wl) == 0) {
313
314                         struct sk_buff *skb = skb_dequeue(&wl->tx_queue);
315                         if (skb == NULL)
316                                 goto out_sleep;
317
318                         ret = wl1251_tx_frame(wl, skb);
319                         if (ret == -EBUSY) {
320                                 skb_queue_head(&wl->tx_queue, skb);
321                                 break;
322                         } else if (ret < 0) {
323                                 dev_kfree_skb(skb);
324                         }
325                 }
326
327                 if (--ctr == 0)
328                         break;
329
330                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
331         } while (intr);
332
333 out_sleep:
334         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
335         wl1251_ps_elp_sleep(wl);
336
337 out:
338         mutex_unlock(&wl->mutex);
339         return IRQ_HANDLED;
340 }
341 EXPORT_SYMBOL_GPL(wl1251_irq);
342
343 static void wl1251_irq_work(struct work_struct *work)
344 {
345         struct wl1251 *wl =
346                 container_of(work, struct wl1251, irq_work);
347
348         wl1251_irq(0, wl);
349 }
350
351 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
352                        u16 beacon_interval, u8 dtim_period)
353 {
354         int ret;
355
356         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
357                                      DEFAULT_HW_GEN_MODULATION_TYPE,
358                                      wl->tx_mgmt_frm_rate,
359                                      wl->tx_mgmt_frm_mod);
360         if (ret < 0)
361                 goto out;
362
363         /*
364          * Join command applies filters, and if we are not associated,
365          * BSSID filter must be disabled for association to work.
366          */
367         if (is_zero_ether_addr(wl->bssid))
368                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
369
370         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
371                               dtim_period);
372         if (ret < 0)
373                 goto out;
374
375         ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
376         if (ret < 0)
377                 wl1251_warning("join timeout");
378
379 out:
380         return ret;
381 }
382
383 static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
384 {
385         struct wl1251 *wl = hw->priv;
386         unsigned long flags;
387
388         skb_queue_tail(&wl->tx_queue, skb);
389
390         /*
391          * The chip specific setup must run before the first TX packet -
392          * before that, the tx_work will not be initialized!
393          */
394
395         ieee80211_queue_work(wl->hw, &wl->tx_work);
396
397         /*
398          * The workqueue is slow to process the tx_queue and we need stop
399          * the queue here, otherwise the queue will get too long.
400          */
401         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
402                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
403
404                 spin_lock_irqsave(&wl->wl_lock, flags);
405                 ieee80211_stop_queues(wl->hw);
406                 wl->tx_queue_stopped = true;
407                 spin_unlock_irqrestore(&wl->wl_lock, flags);
408         }
409 }
410
411 static int wl1251_op_start(struct ieee80211_hw *hw)
412 {
413         struct wl1251 *wl = hw->priv;
414         struct wiphy *wiphy = hw->wiphy;
415         int ret = 0;
416
417         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
418
419         mutex_lock(&wl->mutex);
420
421         if (wl->state != WL1251_STATE_OFF) {
422                 wl1251_error("cannot start because not in off state: %d",
423                              wl->state);
424                 ret = -EBUSY;
425                 goto out;
426         }
427
428         ret = wl1251_chip_wakeup(wl);
429         if (ret < 0)
430                 goto out;
431
432         ret = wl1251_boot(wl);
433         if (ret < 0)
434                 goto out;
435
436         ret = wl1251_hw_init(wl);
437         if (ret < 0)
438                 goto out;
439
440         ret = wl1251_acx_station_id(wl);
441         if (ret < 0)
442                 goto out;
443
444         wl->state = WL1251_STATE_ON;
445
446         wl1251_info("firmware booted (%s)", wl->fw_ver);
447
448         /* update hw/fw version info in wiphy struct */
449         wiphy->hw_version = wl->chip_id;
450         strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
451
452 out:
453         if (ret < 0)
454                 wl1251_power_off(wl);
455
456         mutex_unlock(&wl->mutex);
457
458         return ret;
459 }
460
461 static void wl1251_op_stop(struct ieee80211_hw *hw)
462 {
463         struct wl1251 *wl = hw->priv;
464
465         wl1251_info("down");
466
467         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
468
469         mutex_lock(&wl->mutex);
470
471         WARN_ON(wl->state != WL1251_STATE_ON);
472
473         if (wl->scanning) {
474                 ieee80211_scan_completed(wl->hw, true);
475                 wl->scanning = false;
476         }
477
478         wl->state = WL1251_STATE_OFF;
479
480         wl1251_disable_interrupts(wl);
481
482         mutex_unlock(&wl->mutex);
483
484         cancel_work_sync(&wl->irq_work);
485         cancel_work_sync(&wl->tx_work);
486         cancel_delayed_work_sync(&wl->ps_work);
487         cancel_delayed_work_sync(&wl->elp_work);
488
489         mutex_lock(&wl->mutex);
490
491         /* let's notify MAC80211 about the remaining pending TX frames */
492         wl1251_tx_flush(wl);
493         wl1251_power_off(wl);
494
495         memset(wl->bssid, 0, ETH_ALEN);
496         wl->listen_int = 1;
497         wl->bss_type = MAX_BSS_TYPE;
498
499         wl->data_in_count = 0;
500         wl->rx_counter = 0;
501         wl->rx_handled = 0;
502         wl->rx_current_buffer = 0;
503         wl->rx_last_id = 0;
504         wl->next_tx_complete = 0;
505         wl->elp = false;
506         wl->station_mode = STATION_ACTIVE_MODE;
507         wl->tx_queue_stopped = false;
508         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
509         wl->rssi_thold = 0;
510         wl->channel = WL1251_DEFAULT_CHANNEL;
511         wl->monitor_present = false;
512         wl->joined = false;
513         wl->long_doze_mode_set = false;
514
515         wl1251_debugfs_reset(wl);
516
517         mutex_unlock(&wl->mutex);
518 }
519
520 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
521                                    struct ieee80211_vif *vif)
522 {
523         struct wl1251 *wl = hw->priv;
524         int ret = 0;
525
526         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
527                      vif->type, vif->addr);
528
529         mutex_lock(&wl->mutex);
530         if (wl->vif) {
531                 ret = -EBUSY;
532                 goto out;
533         }
534
535         wl->vif = vif;
536
537         switch (vif->type) {
538         case NL80211_IFTYPE_STATION:
539                 wl->bss_type = BSS_TYPE_STA_BSS;
540                 break;
541         case NL80211_IFTYPE_ADHOC:
542                 wl->bss_type = BSS_TYPE_IBSS;
543                 break;
544         default:
545                 ret = -EOPNOTSUPP;
546                 goto out;
547         }
548
549         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
550                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
551                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
552                 ret = wl1251_acx_station_id(wl);
553                 if (ret < 0)
554                         goto out;
555         }
556
557 out:
558         mutex_unlock(&wl->mutex);
559         return ret;
560 }
561
562 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
563                                          struct ieee80211_vif *vif)
564 {
565         struct wl1251 *wl = hw->priv;
566
567         mutex_lock(&wl->mutex);
568         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
569         wl->vif = NULL;
570         memset(wl->bssid, 0, ETH_ALEN);
571         mutex_unlock(&wl->mutex);
572 }
573
574 static int wl1251_build_null_data(struct wl1251 *wl)
575 {
576         struct sk_buff *skb = NULL;
577         int size;
578         void *ptr;
579         int ret = -ENOMEM;
580
581
582         if (wl->bss_type == BSS_TYPE_IBSS) {
583                 size = sizeof(struct wl12xx_null_data_template);
584                 ptr = NULL;
585         } else {
586                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
587                 if (!skb)
588                         goto out;
589                 size = skb->len;
590                 ptr = skb->data;
591         }
592
593         ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
594
595 out:
596         dev_kfree_skb(skb);
597         if (ret)
598                 wl1251_warning("cmd buld null data failed %d", ret);
599
600         return ret;
601
602 }
603
604 static int wl1251_build_qos_null_data(struct wl1251 *wl)
605 {
606         struct ieee80211_qos_hdr template;
607
608         memset(&template, 0, sizeof(template));
609
610         memcpy(template.addr1, wl->bssid, ETH_ALEN);
611         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
612         memcpy(template.addr3, wl->bssid, ETH_ALEN);
613
614         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
615                                              IEEE80211_STYPE_QOS_NULLFUNC |
616                                              IEEE80211_FCTL_TODS);
617
618         /* FIXME: not sure what priority to use here */
619         template.qos_ctrl = cpu_to_le16(0);
620
621         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
622                                        sizeof(template));
623 }
624
625 static void wl1251_ps_work(struct work_struct *work)
626 {
627         struct delayed_work *dwork;
628         struct wl1251 *wl;
629         unsigned long diff, wait;
630         bool need_ps;
631         bool have_ps;
632         int ret;
633         int i;
634
635         dwork = container_of(work, struct delayed_work, work);
636         wl = container_of(dwork, struct wl1251, ps_work);
637
638         mutex_lock(&wl->mutex);
639
640         /* don't change PS modes while still transitioning, to avoid possbile
641          * fw bugs (it normally takes ~130ms to enable and ~10ms to disable) */
642         if (wl->ps_transitioning) {
643                 diff = jiffies - wl->ps_change_jiffies;
644                 if (diff > msecs_to_jiffies(500)) {
645                         wl1251_error("PS change taking too long: %lu", diff);
646                         wl->ps_transitioning = false;
647                 } else {
648                         //wl1251_error("PS still transitioning");
649                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work,
650                                 msecs_to_jiffies(50));
651                         goto out;
652                 }
653         }
654
655         need_ps = wl->psm_requested && !wl->bss_lost;
656         have_ps = wl->station_mode == STATION_POWER_SAVE_MODE;
657
658         if (need_ps == have_ps) {
659                 //wl1251_info("ps: already in mode %d", have_ps);
660                 goto out;
661         }
662
663         /* don't enter PS if there was recent activity */
664         if (need_ps) {
665                 wait = 0;
666
667                 diff = jiffies - wl->last_io_jiffies;
668                 if (diff < msecs_to_jiffies(150)) {
669                         //wl1251_info("ps: postponed psm, j %ld", diff);
670                         wait = msecs_to_jiffies(150) - diff + 1;
671                 }
672
673                 for (i = 0; i < ARRAY_SIZE(wl->tx_frames); i++) {
674                         if (wl->tx_frames[i] != NULL) {
675                                 //wl1251_error("  frm %d busy", i);
676                                 if (wait < msecs_to_jiffies(50))
677                                         wait = msecs_to_jiffies(50);
678                                 break;
679                         }
680                 }
681
682                 if (wait > 0) {
683                         ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, wait);
684                         goto out;
685                 }
686         }
687
688         ret = wl1251_ps_elp_wakeup(wl);
689         if (ret < 0)
690                 goto out;
691
692         if (need_ps) {
693                 wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
694                                             wl->dtim_period);
695         }
696         ret = wl1251_ps_set_mode(wl,
697                 need_ps ? STATION_POWER_SAVE_MODE : STATION_ACTIVE_MODE);
698         if (ret < 0)
699                 goto out_sleep;
700
701         //wl1251_info("psm %d, j %ld, d %ld", need_ps,
702         //      jiffies - wl->last_io_jiffies);
703
704 out_sleep:
705         wl1251_ps_elp_sleep(wl);
706
707 out:
708         mutex_unlock(&wl->mutex);
709 }
710
711 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
712 {
713         return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
714 }
715
716 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
717 {
718         struct wl1251 *wl = hw->priv;
719         struct ieee80211_conf *conf = &hw->conf;
720         int channel, ret = 0;
721
722         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
723
724         wl1251_debug(DEBUG_MAC80211,
725                      "mac80211 config ch %d monitor %s psm %s power %d",
726                      channel,
727                      conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
728                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
729                      conf->power_level);
730
731         mutex_lock(&wl->mutex);
732
733         ret = wl1251_ps_elp_wakeup(wl);
734         if (ret < 0)
735                 goto out;
736
737         if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
738                 u32 mode;
739
740                 if (conf->flags & IEEE80211_CONF_MONITOR) {
741                         wl->monitor_present = true;
742                         mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
743                 } else {
744                         wl->monitor_present = false;
745                         mode = 0;
746                 }
747
748                 ret = wl1251_acx_feature_cfg(wl, mode);
749                 if (ret < 0)
750                         goto out_sleep;
751         }
752
753         if (channel != wl->channel) {
754                 wl->channel = channel;
755
756                 /*
757                  * Use ENABLE_RX command for channel switching when no
758                  * interface is present (monitor mode only).
759                  * This leaves the tx path disabled in firmware, whereas
760                  * the usual JOIN command seems to transmit some frames
761                  * at firmware level.
762                  *
763                  * Note that bss_type must be BSS_TYPE_STA_BSS, also at least
764                  * one join has to be performed before CMD_ENABLE_RX can
765                  * properly switch channels (join will be done by CONF_IDLE).
766                  */
767                 if (wl->vif == NULL) {
768                         wl->bss_type = BSS_TYPE_STA_BSS;
769                         wl->joined = false;
770                         ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
771                 } else {
772                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
773                                           wl->beacon_int, wl->dtim_period);
774                 }
775                 if (ret < 0)
776                         goto out_sleep;
777         }
778
779         if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
780                 wl1251_debug(DEBUG_PSM, "psm enabled");
781
782                 wl->psm_requested = true;
783
784                 wl->dtim_period = conf->ps_dtim_period;
785
786                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
787         } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
788                 wl1251_debug(DEBUG_PSM, "psm disabled");
789
790                 wl->psm_requested = false;
791
792                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
793         }
794
795         if (changed & IEEE80211_CONF_CHANGE_IDLE) {
796                 if (conf->flags & IEEE80211_CONF_IDLE) {
797                         ret = wl1251_ps_set_mode(wl, STATION_IDLE);
798                         if (ret < 0)
799                                 goto out_sleep;
800                 } else {
801                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
802                         if (ret < 0)
803                                 goto out_sleep;
804
805                         ret = wl1251_event_wait(wl, PS_REPORT_EVENT_ID, 100);
806                         if (ret < 0)
807                                 wl1251_error("error waiting for wakeup");
808
809                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
810                                           wl->beacon_int, wl->dtim_period);
811                         if (ret < 0)
812                                 goto out_sleep;
813                 }
814         }
815
816         if (conf->power_level != wl->power_level) {
817                 ret = wl1251_acx_tx_power(wl, conf->power_level);
818                 if (ret < 0)
819                         goto out_sleep;
820
821                 wl->power_level = conf->power_level;
822         }
823
824 out_sleep:
825         wl1251_ps_elp_sleep(wl);
826
827 out:
828         mutex_unlock(&wl->mutex);
829
830         return ret;
831 }
832
833 struct wl1251_filter_params {
834         bool enabled;
835         int mc_list_length;
836         u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
837 };
838
839 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
840                                        struct netdev_hw_addr_list *mc_list)
841 {
842         struct wl1251_filter_params *fp;
843         struct netdev_hw_addr *ha;
844         struct wl1251 *wl = hw->priv;
845
846         if (unlikely(wl->state == WL1251_STATE_OFF))
847                 return 0;
848
849         fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
850         if (!fp) {
851                 wl1251_error("Out of memory setting filters.");
852                 return 0;
853         }
854
855         /* update multicast filtering parameters */
856         fp->mc_list_length = 0;
857         if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
858                 fp->enabled = false;
859         } else {
860                 fp->enabled = true;
861                 netdev_hw_addr_list_for_each(ha, mc_list) {
862                         memcpy(fp->mc_list[fp->mc_list_length],
863                                         ha->addr, ETH_ALEN);
864                         fp->mc_list_length++;
865                 }
866         }
867
868         return (u64)(unsigned long)fp;
869 }
870
871 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
872                                   FIF_ALLMULTI | \
873                                   FIF_FCSFAIL | \
874                                   FIF_BCN_PRBRESP_PROMISC | \
875                                   FIF_CONTROL | \
876                                   FIF_OTHER_BSS | \
877                                   FIF_PROBE_REQ)
878
879 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
880                                        unsigned int changed,
881                                        unsigned int *total, u64 multicast)
882 {
883         struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
884         struct wl1251 *wl = hw->priv;
885         int ret;
886
887         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
888
889         *total &= WL1251_SUPPORTED_FILTERS;
890         changed &= WL1251_SUPPORTED_FILTERS;
891
892         if (changed == 0) {
893                 /* no filters which we support changed */
894                 kfree(fp);
895                 return;
896         }
897
898         mutex_lock(&wl->mutex);
899
900         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
901         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
902
903         if (*total & FIF_PROMISC_IN_BSS) {
904                 wl->rx_config |= CFG_BSSID_FILTER_EN;
905                 wl->rx_config |= CFG_RX_ALL_GOOD;
906         }
907         if (*total & FIF_ALLMULTI)
908                 /*
909                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
910                  * all multicast frames
911                  */
912                 wl->rx_config &= ~CFG_MC_FILTER_EN;
913         if (*total & FIF_FCSFAIL)
914                 wl->rx_filter |= CFG_RX_FCS_ERROR;
915         if (*total & FIF_BCN_PRBRESP_PROMISC) {
916                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
917                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
918         }
919         if (*total & FIF_CONTROL)
920                 wl->rx_filter |= CFG_RX_CTL_EN;
921         if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
922                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
923         if (*total & FIF_PROBE_REQ)
924                 wl->rx_filter |= CFG_RX_PREQ_EN;
925
926         if (wl->state == WL1251_STATE_OFF)
927                 goto out;
928
929         ret = wl1251_ps_elp_wakeup(wl);
930         if (ret < 0)
931                 goto out;
932
933         if (*total & FIF_ALLMULTI || *total & FIF_PROMISC_IN_BSS)
934                 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
935         else if (fp)
936                 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
937                                                    fp->mc_list,
938                                                    fp->mc_list_length);
939         if (ret < 0)
940                 goto out;
941
942         /* send filters to firmware */
943         wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
944
945         wl1251_ps_elp_sleep(wl);
946
947 out:
948         mutex_unlock(&wl->mutex);
949         kfree(fp);
950 }
951
952 /* HW encryption */
953 static int wl1251_set_key_type(struct wl1251 *wl,
954                                struct wl1251_cmd_set_keys *key,
955                                enum set_key_cmd cmd,
956                                struct ieee80211_key_conf *mac80211_key,
957                                const u8 *addr)
958 {
959         switch (mac80211_key->cipher) {
960         case WLAN_CIPHER_SUITE_WEP40:
961         case WLAN_CIPHER_SUITE_WEP104:
962                 if (is_broadcast_ether_addr(addr))
963                         key->key_type = KEY_WEP_DEFAULT;
964                 else
965                         key->key_type = KEY_WEP_ADDR;
966
967                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
968                 break;
969         case WLAN_CIPHER_SUITE_TKIP:
970                 if (is_broadcast_ether_addr(addr))
971                         key->key_type = KEY_TKIP_MIC_GROUP;
972                 else
973                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
974
975                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
976                 break;
977         case WLAN_CIPHER_SUITE_CCMP:
978                 if (is_broadcast_ether_addr(addr))
979                         key->key_type = KEY_AES_GROUP;
980                 else
981                         key->key_type = KEY_AES_PAIRWISE;
982                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
983                 break;
984         default:
985                 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
986                 return -EOPNOTSUPP;
987         }
988
989         return 0;
990 }
991
992 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
993                              struct ieee80211_vif *vif,
994                              struct ieee80211_sta *sta,
995                              struct ieee80211_key_conf *key)
996 {
997         struct wl1251 *wl = hw->priv;
998         struct wl1251_cmd_set_keys *wl_cmd;
999         const u8 *addr;
1000         int ret;
1001
1002         static const u8 bcast_addr[ETH_ALEN] =
1003                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
1004
1005         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
1006
1007         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
1008         if (!wl_cmd) {
1009                 ret = -ENOMEM;
1010                 goto out;
1011         }
1012
1013         addr = sta ? sta->addr : bcast_addr;
1014
1015         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
1016         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
1017         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
1018                      key->cipher, key->keyidx, key->keylen, key->flags);
1019         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
1020
1021         if (is_zero_ether_addr(addr)) {
1022                 /* We dont support TX only encryption */
1023                 ret = -EOPNOTSUPP;
1024                 goto out;
1025         }
1026
1027         mutex_lock(&wl->mutex);
1028
1029         switch (cmd) {
1030         case SET_KEY:
1031                 if (wl->monitor_present) {
1032                         ret = -EOPNOTSUPP;
1033                         goto out_unlock;
1034                 }
1035                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
1036                 break;
1037         case DISABLE_KEY:
1038                 wl_cmd->key_action = KEY_REMOVE;
1039                 break;
1040         default:
1041                 wl1251_error("Unsupported key cmd 0x%x", cmd);
1042                 break;
1043         }
1044
1045         ret = wl1251_ps_elp_wakeup(wl);
1046         if (ret < 0)
1047                 goto out_unlock;
1048
1049         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
1050         if (ret < 0) {
1051                 wl1251_error("Set KEY type failed");
1052                 goto out_sleep;
1053         }
1054
1055         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
1056                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
1057
1058         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
1059             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
1060                 /*
1061                  * We get the key in the following form:
1062                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
1063                  * but the target is expecting:
1064                  * TKIP - RX MIC - TX MIC
1065                  */
1066                 memcpy(wl_cmd->key, key->key, 16);
1067                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
1068                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
1069
1070         } else {
1071                 memcpy(wl_cmd->key, key->key, key->keylen);
1072         }
1073         wl_cmd->key_size = key->keylen;
1074
1075         wl_cmd->id = key->keyidx;
1076         wl_cmd->ssid_profile = 0;
1077
1078         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
1079
1080         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
1081         if (ret < 0) {
1082                 wl1251_warning("could not set keys");
1083                 goto out_sleep;
1084         }
1085
1086 out_sleep:
1087         wl1251_ps_elp_sleep(wl);
1088
1089 out_unlock:
1090         mutex_unlock(&wl->mutex);
1091
1092 out:
1093         kfree(wl_cmd);
1094
1095         return ret;
1096 }
1097
1098 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
1099                              struct ieee80211_vif *vif,
1100                              struct cfg80211_scan_request *req)
1101 {
1102         struct wl1251 *wl = hw->priv;
1103         struct sk_buff *skb;
1104         size_t ssid_len = 0;
1105         u8 *ssid = NULL;
1106         int ret;
1107
1108         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1109
1110         if (req->n_ssids) {
1111                 ssid = req->ssids[0].ssid;
1112                 ssid_len = req->ssids[0].ssid_len;
1113         }
1114
1115         mutex_lock(&wl->mutex);
1116
1117         if (wl->scanning) {
1118                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1119                 ret = -EINVAL;
1120                 goto out;
1121         }
1122
1123         ret = wl1251_ps_elp_wakeup(wl);
1124         if (ret < 0)
1125                 goto out;
1126
1127         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
1128                                      req->ie, req->ie_len);
1129         if (!skb) {
1130                 ret = -ENOMEM;
1131                 goto out;
1132         }
1133
1134         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1135                                       skb->len);
1136         dev_kfree_skb(skb);
1137         if (ret < 0)
1138                 goto out_sleep;
1139
1140         ret = wl1251_cmd_trigger_scan_to(wl, 0);
1141         if (ret < 0)
1142                 goto out_sleep;
1143
1144         wl->scanning = true;
1145
1146         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1147                               req->n_channels, WL1251_SCAN_NUM_PROBES);
1148         if (ret < 0) {
1149                 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1150                 wl->scanning = false;
1151                 goto out_sleep;
1152         }
1153
1154 out_sleep:
1155         wl1251_ps_elp_sleep(wl);
1156
1157 out:
1158         mutex_unlock(&wl->mutex);
1159
1160         return ret;
1161 }
1162
1163 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1164 {
1165         struct wl1251 *wl = hw->priv;
1166         int ret;
1167
1168         mutex_lock(&wl->mutex);
1169
1170         ret = wl1251_ps_elp_wakeup(wl);
1171         if (ret < 0)
1172                 goto out;
1173
1174         ret = wl1251_acx_rts_threshold(wl, (u16) value);
1175         if (ret < 0)
1176                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1177
1178         wl1251_ps_elp_sleep(wl);
1179
1180 out:
1181         mutex_unlock(&wl->mutex);
1182
1183         return ret;
1184 }
1185
1186 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1187                                        struct ieee80211_vif *vif,
1188                                        struct ieee80211_bss_conf *bss_conf,
1189                                        u32 changed)
1190 {
1191         struct wl1251 *wl = hw->priv;
1192         struct sk_buff *beacon, *skb;
1193         bool do_join = false;
1194         bool enable;
1195         int ret;
1196
1197         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1198
1199         mutex_lock(&wl->mutex);
1200
1201         ret = wl1251_ps_elp_wakeup(wl);
1202         if (ret < 0)
1203                 goto out;
1204
1205         if (changed & BSS_CHANGED_CQM) {
1206                 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1207                                           WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1208                                           WL1251_DEFAULT_LOW_RSSI_DEPTH,
1209                                           WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1210                 if (ret < 0)
1211                         goto out;
1212                 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1213         }
1214
1215         if ((changed & BSS_CHANGED_BSSID) &&
1216             memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1217                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1218
1219                 if (!is_zero_ether_addr(wl->bssid)) {
1220                         ret = wl1251_build_null_data(wl);
1221                         if (ret < 0)
1222                                 goto out_sleep;
1223
1224                         ret = wl1251_build_qos_null_data(wl);
1225                         if (ret < 0)
1226                                 goto out_sleep;
1227
1228                         do_join = true;
1229                 }
1230         }
1231
1232         if (changed & BSS_CHANGED_ASSOC) {
1233                 if (bss_conf->assoc) {
1234                         wl->beacon_int = bss_conf->beacon_int;
1235
1236                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1237                         if (!skb)
1238                                 goto out_sleep;
1239
1240                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1241                                                       skb->data,
1242                                                       skb->len);
1243                         dev_kfree_skb(skb);
1244                         if (ret < 0)
1245                                 goto out_sleep;
1246
1247                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1248                         if (ret < 0)
1249                                 goto out_sleep;
1250                 } else {
1251                         /* use defaults when not associated */
1252                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1253                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1254                 }
1255         }
1256         if (changed & BSS_CHANGED_ERP_SLOT) {
1257                 if (bss_conf->use_short_slot)
1258                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1259                 else
1260                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1261                 if (ret < 0) {
1262                         wl1251_warning("Set slot time failed %d", ret);
1263                         goto out_sleep;
1264                 }
1265         }
1266
1267         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1268                 if (bss_conf->use_short_preamble)
1269                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1270                 else
1271                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1272         }
1273
1274         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1275                 if (bss_conf->use_cts_prot)
1276                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1277                 else
1278                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1279                 if (ret < 0) {
1280                         wl1251_warning("Set ctsprotect failed %d", ret);
1281                         goto out_sleep;
1282                 }
1283         }
1284
1285         if (changed & BSS_CHANGED_ARP_FILTER) {
1286                 __be32 addr = bss_conf->arp_addr_list[0];
1287                 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1288
1289                 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1290                 wl1251_acx_arp_ip_filter(wl, enable, addr);
1291
1292                 if (ret < 0)
1293                         goto out_sleep;
1294         }
1295
1296         if (changed & BSS_CHANGED_BEACON) {
1297                 beacon = ieee80211_beacon_get(hw, vif);
1298                 if (!beacon)
1299                         goto out_sleep;
1300
1301                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1302                                               beacon->len);
1303
1304                 if (ret < 0) {
1305                         dev_kfree_skb(beacon);
1306                         goto out_sleep;
1307                 }
1308
1309                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1310                                               beacon->len);
1311
1312                 dev_kfree_skb(beacon);
1313
1314                 if (ret < 0)
1315                         goto out_sleep;
1316
1317                 do_join = true;
1318         }
1319
1320         if (do_join) {
1321                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1322                                   wl->beacon_int, wl->dtim_period);
1323                 if (ret < 0)
1324                         goto out_sleep;
1325         }
1326
1327 out_sleep:
1328         wl1251_ps_elp_sleep(wl);
1329
1330 out:
1331         mutex_unlock(&wl->mutex);
1332 }
1333
1334
1335 /* can't be const, mac80211 writes to this */
1336 static struct ieee80211_rate wl1251_rates[] = {
1337         { .bitrate = 10,
1338           .hw_value = 0x1,
1339           .hw_value_short = 0x1, },
1340         { .bitrate = 20,
1341           .hw_value = 0x2,
1342           .hw_value_short = 0x2,
1343           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1344         { .bitrate = 55,
1345           .hw_value = 0x4,
1346           .hw_value_short = 0x4,
1347           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1348         { .bitrate = 110,
1349           .hw_value = 0x20,
1350           .hw_value_short = 0x20,
1351           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1352         { .bitrate = 60,
1353           .hw_value = 0x8,
1354           .hw_value_short = 0x8, },
1355         { .bitrate = 90,
1356           .hw_value = 0x10,
1357           .hw_value_short = 0x10, },
1358         { .bitrate = 120,
1359           .hw_value = 0x40,
1360           .hw_value_short = 0x40, },
1361         { .bitrate = 180,
1362           .hw_value = 0x80,
1363           .hw_value_short = 0x80, },
1364         { .bitrate = 240,
1365           .hw_value = 0x200,
1366           .hw_value_short = 0x200, },
1367         { .bitrate = 360,
1368          .hw_value = 0x400,
1369          .hw_value_short = 0x400, },
1370         { .bitrate = 480,
1371           .hw_value = 0x800,
1372           .hw_value_short = 0x800, },
1373         { .bitrate = 540,
1374           .hw_value = 0x1000,
1375           .hw_value_short = 0x1000, },
1376 };
1377
1378 /* can't be const, mac80211 writes to this */
1379 static struct ieee80211_channel wl1251_channels[] = {
1380         { .hw_value = 1, .center_freq = 2412},
1381         { .hw_value = 2, .center_freq = 2417},
1382         { .hw_value = 3, .center_freq = 2422},
1383         { .hw_value = 4, .center_freq = 2427},
1384         { .hw_value = 5, .center_freq = 2432},
1385         { .hw_value = 6, .center_freq = 2437},
1386         { .hw_value = 7, .center_freq = 2442},
1387         { .hw_value = 8, .center_freq = 2447},
1388         { .hw_value = 9, .center_freq = 2452},
1389         { .hw_value = 10, .center_freq = 2457},
1390         { .hw_value = 11, .center_freq = 2462},
1391         { .hw_value = 12, .center_freq = 2467},
1392         { .hw_value = 13, .center_freq = 2472},
1393 };
1394
1395 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1396                              struct ieee80211_vif *vif, u16 queue,
1397                              const struct ieee80211_tx_queue_params *params)
1398 {
1399         enum wl1251_acx_ps_scheme ps_scheme;
1400         struct wl1251 *wl = hw->priv;
1401         int ret;
1402
1403         mutex_lock(&wl->mutex);
1404
1405         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1406
1407         ret = wl1251_ps_elp_wakeup(wl);
1408         if (ret < 0)
1409                 goto out;
1410
1411         /* mac80211 uses units of 32 usec */
1412         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1413                                 params->cw_min, params->cw_max,
1414                                 params->aifs, params->txop * 32);
1415         if (ret < 0)
1416                 goto out_sleep;
1417
1418         if (params->uapsd)
1419                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1420         else
1421                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1422
1423         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1424                                  CHANNEL_TYPE_EDCF,
1425                                  wl1251_tx_get_queue(queue), ps_scheme,
1426                                  WL1251_ACX_ACK_POLICY_LEGACY);
1427         if (ret < 0)
1428                 goto out_sleep;
1429
1430 out_sleep:
1431         wl1251_ps_elp_sleep(wl);
1432
1433 out:
1434         mutex_unlock(&wl->mutex);
1435
1436         return ret;
1437 }
1438
1439 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1440                                 struct survey_info *survey)
1441 {
1442         struct wl1251 *wl = hw->priv;
1443         struct ieee80211_conf *conf = &hw->conf;
1444  
1445         if (idx != 0)
1446                 return -ENOENT;
1447  
1448         survey->channel = conf->channel;
1449         survey->filled = SURVEY_INFO_NOISE_DBM;
1450         survey->noise = wl->noise;
1451  
1452         return 0;
1453 }
1454
1455 /* can't be const, mac80211 writes to this */
1456 static struct ieee80211_supported_band wl1251_band_2ghz = {
1457         .channels = wl1251_channels,
1458         .n_channels = ARRAY_SIZE(wl1251_channels),
1459         .bitrates = wl1251_rates,
1460         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1461 };
1462
1463 static const struct ieee80211_ops wl1251_ops = {
1464         .start = wl1251_op_start,
1465         .stop = wl1251_op_stop,
1466         .add_interface = wl1251_op_add_interface,
1467         .remove_interface = wl1251_op_remove_interface,
1468         .config = wl1251_op_config,
1469         .prepare_multicast = wl1251_op_prepare_multicast,
1470         .configure_filter = wl1251_op_configure_filter,
1471         .tx = wl1251_op_tx,
1472         .set_key = wl1251_op_set_key,
1473         .hw_scan = wl1251_op_hw_scan,
1474         .bss_info_changed = wl1251_op_bss_info_changed,
1475         .set_rts_threshold = wl1251_op_set_rts_threshold,
1476         .conf_tx = wl1251_op_conf_tx,
1477         .get_survey = wl1251_op_get_survey,
1478 };
1479
1480 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1481 {
1482         unsigned long timeout;
1483
1484         wl1251_reg_write32(wl, EE_ADDR, offset);
1485         wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1486
1487         /* EE_CTL_READ clears when data is ready */
1488         timeout = jiffies + msecs_to_jiffies(100);
1489         while (1) {
1490                 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1491                         break;
1492
1493                 if (time_after(jiffies, timeout))
1494                         return -ETIMEDOUT;
1495
1496                 msleep(1);
1497         }
1498
1499         *data = wl1251_reg_read32(wl, EE_DATA);
1500         return 0;
1501 }
1502
1503 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1504                               u8 *data, size_t len)
1505 {
1506         size_t i;
1507         int ret;
1508
1509         wl1251_reg_write32(wl, EE_START, 0);
1510
1511         for (i = 0; i < len; i++) {
1512                 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1513                 if (ret < 0)
1514                         return ret;
1515         }
1516
1517         return 0;
1518 }
1519
1520 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1521 {
1522         u8 mac[ETH_ALEN];
1523         int i, ret;
1524
1525         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1526
1527         ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1528         if (ret < 0) {
1529                 wl1251_warning("failed to read MAC address from EEPROM");
1530                 return ret;
1531         }
1532
1533         /* MAC is stored in reverse order */
1534         for (i = 0; i < ETH_ALEN; i++)
1535                 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1536
1537         return 0;
1538 }
1539
1540 /* temporary (?) hack for EEPROM dumping
1541  * (it seems this can only be done before fw is running) */
1542 static int wl1251_dump_eeprom(struct wl1251 *wl)
1543 {
1544         int ret;
1545
1546         wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1547
1548         wl->eeprom_dump = kzalloc(1024, GFP_KERNEL);
1549         if (wl->eeprom_dump == NULL) {
1550                 ret = -ENOMEM;
1551                 goto out;
1552         }
1553
1554         ret = wl1251_read_eeprom(wl, 0, wl->eeprom_dump, 1024);
1555         if (ret != 0) {
1556                 wl1251_error("eeprom dump failed: %d", ret);
1557                 kfree(wl->eeprom_dump);
1558                 wl->eeprom_dump = NULL;
1559                 goto out;
1560         }
1561
1562         wl1251_info("eeprom dumped.");
1563
1564 out:
1565         return ret;
1566 }
1567
1568 static int wl1251_register_hw(struct wl1251 *wl)
1569 {
1570         int ret;
1571
1572         if (wl->mac80211_registered)
1573                 return 0;
1574
1575         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1576
1577         ret = ieee80211_register_hw(wl->hw);
1578         if (ret < 0) {
1579                 wl1251_error("unable to register mac80211 hw: %d", ret);
1580                 return ret;
1581         }
1582
1583         wl->mac80211_registered = true;
1584
1585         wl1251_notice("loaded");
1586
1587         return 0;
1588 }
1589
1590 int wl1251_init_ieee80211(struct wl1251 *wl)
1591 {
1592         int ret;
1593
1594         /* The tx descriptor buffer and the TKIP space */
1595         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1596                 + WL1251_TKIP_IV_SPACE;
1597
1598         /* unit us */
1599         /* FIXME: find a proper value */
1600         wl->hw->channel_change_time = 10000;
1601
1602         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1603                 IEEE80211_HW_SUPPORTS_PS |
1604                 IEEE80211_HW_BEACON_FILTER |
1605                 IEEE80211_HW_SUPPORTS_UAPSD |
1606                 IEEE80211_HW_SUPPORTS_CQM_RSSI;
1607
1608         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1609                                          BIT(NL80211_IFTYPE_ADHOC);
1610         wl->hw->wiphy->max_scan_ssids = 1;
1611         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1612
1613         wl->hw->queues = 4;
1614
1615         if (wl->use_eeprom)
1616                 wl1251_read_eeprom_mac(wl);
1617         if (wl->dump_eeprom)
1618                 wl1251_dump_eeprom(wl);
1619
1620         ret = wl1251_register_hw(wl);
1621         if (ret)
1622                 goto out;
1623
1624         wl1251_debugfs_init(wl);
1625         wl1251_notice("initialized");
1626
1627         ret = 0;
1628
1629 out:
1630         return ret;
1631 }
1632 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1633
1634 struct ieee80211_hw *wl1251_alloc_hw(void)
1635 {
1636         struct ieee80211_hw *hw;
1637         struct wl1251 *wl;
1638         int i;
1639         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1640
1641         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1642         if (!hw) {
1643                 wl1251_error("could not alloc ieee80211_hw");
1644                 return ERR_PTR(-ENOMEM);
1645         }
1646
1647         wl = hw->priv;
1648         memset(wl, 0, sizeof(*wl));
1649
1650         wl->hw = hw;
1651
1652         wl->data_in_count = 0;
1653
1654         skb_queue_head_init(&wl->tx_queue);
1655
1656         INIT_DELAYED_WORK(&wl->ps_work, wl1251_ps_work);
1657         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1658         wl->channel = WL1251_DEFAULT_CHANNEL;
1659         wl->monitor_present = false;
1660         wl->joined = false;
1661         wl->scanning = false;
1662         wl->bss_type = MAX_BSS_TYPE;
1663         wl->default_key = 0;
1664         wl->listen_int = 1;
1665         wl->rx_counter = 0;
1666         wl->rx_handled = 0;
1667         wl->rx_current_buffer = 0;
1668         wl->rx_last_id = 0;
1669         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1670         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1671         wl->elp = false;
1672         wl->station_mode = STATION_ACTIVE_MODE;
1673         wl->psm_requested = false;
1674         wl->tx_queue_stopped = false;
1675         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1676         wl->rssi_thold = 0;
1677         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1678         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1679         wl->vif = NULL;
1680
1681         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1682                 wl->tx_frames[i] = NULL;
1683
1684         wl->next_tx_complete = 0;
1685
1686         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1687         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1688
1689         /*
1690          * In case our MAC address is not correctly set,
1691          * we use a random but Nokia MAC.
1692          */
1693         memcpy(wl->mac_addr, nokia_oui, 3);
1694         get_random_bytes(wl->mac_addr + 3, 3);
1695
1696         wl->state = WL1251_STATE_OFF;
1697         mutex_init(&wl->mutex);
1698
1699         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1700         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1701
1702         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1703         if (!wl->rx_descriptor) {
1704                 wl1251_error("could not allocate memory for rx descriptor");
1705                 ieee80211_free_hw(hw);
1706                 return ERR_PTR(-ENOMEM);
1707         }
1708
1709         return hw;
1710 }
1711 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1712
1713 int wl1251_free_hw(struct wl1251 *wl)
1714 {
1715         ieee80211_unregister_hw(wl->hw);
1716
1717         wl1251_debugfs_exit(wl);
1718
1719         kfree(wl->target_mem_map);
1720         kfree(wl->data_path);
1721         vfree(wl->fw);
1722         wl->fw = NULL;
1723         kfree(wl->nvs);
1724         wl->nvs = NULL;
1725
1726         kfree(wl->rx_descriptor);
1727         wl->rx_descriptor = NULL;
1728
1729         ieee80211_free_hw(wl->hw);
1730
1731         if (wl->eeprom_dump != NULL)
1732                 kfree(wl->eeprom_dump);
1733
1734         return 0;
1735 }
1736 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1737
1738 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1739 MODULE_LICENSE("GPL");
1740 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1741 MODULE_FIRMWARE(WL1251_FW_NAME);