Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / drivers / net / wireless / wl12xx / wl1251_main.c
1 /*
2  * This file is part of wl1251
3  *
4  * Copyright (C) 2008-2009 Nokia Corporation
5  *
6  * Contact: Kalle Valo <kalle.valo@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23
24 #include <linux/module.h>
25 #include <linux/interrupt.h>
26 #include <linux/firmware.h>
27 #include <linux/delay.h>
28 #include <linux/irq.h>
29 #include <linux/crc32.h>
30 #include <linux/etherdevice.h>
31 #include <linux/vmalloc.h>
32 #include <linux/slab.h>
33
34 #include "wl1251.h"
35 #include "wl12xx_80211.h"
36 #include "wl1251_reg.h"
37 #include "wl1251_io.h"
38 #include "wl1251_cmd.h"
39 #include "wl1251_event.h"
40 #include "wl1251_tx.h"
41 #include "wl1251_rx.h"
42 #include "wl1251_ps.h"
43 #include "wl1251_init.h"
44 #include "wl1251_debugfs.h"
45 #include "wl1251_boot.h"
46
47 void wl1251_enable_interrupts(struct wl1251 *wl)
48 {
49         wl->if_ops->enable_irq(wl);
50 }
51
52 void wl1251_disable_interrupts(struct wl1251 *wl)
53 {
54         wl->if_ops->disable_irq(wl);
55 }
56
57 static void wl1251_power_off(struct wl1251 *wl)
58 {
59         wl->set_power(false);
60 }
61
62 static void wl1251_power_on(struct wl1251 *wl)
63 {
64         wl->set_power(true);
65 }
66
67 static int wl1251_fetch_firmware(struct wl1251 *wl)
68 {
69         const struct firmware *fw;
70         struct device *dev = wiphy_dev(wl->hw->wiphy);
71         int ret;
72
73         ret = request_firmware(&fw, WL1251_FW_NAME, dev);
74
75         if (ret < 0) {
76                 wl1251_error("could not get firmware: %d", ret);
77                 return ret;
78         }
79
80         if (fw->size % 4) {
81                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
82                              fw->size);
83                 ret = -EILSEQ;
84                 goto out;
85         }
86
87         wl->fw_len = fw->size;
88         wl->fw = vmalloc(wl->fw_len);
89
90         if (!wl->fw) {
91                 wl1251_error("could not allocate memory for the firmware");
92                 ret = -ENOMEM;
93                 goto out;
94         }
95
96         memcpy(wl->fw, fw->data, wl->fw_len);
97
98         ret = 0;
99
100 out:
101         release_firmware(fw);
102
103         return ret;
104 }
105
106 static int wl1251_fetch_nvs(struct wl1251 *wl)
107 {
108         const struct firmware *fw;
109         struct device *dev = wiphy_dev(wl->hw->wiphy);
110         int ret;
111
112         ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
113
114         if (ret < 0) {
115                 wl1251_error("could not get nvs file: %d", ret);
116                 return ret;
117         }
118
119         if (fw->size % 4) {
120                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
121                              fw->size);
122                 ret = -EILSEQ;
123                 goto out;
124         }
125
126         wl->nvs_len = fw->size;
127         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
128
129         if (!wl->nvs) {
130                 wl1251_error("could not allocate memory for the nvs file");
131                 ret = -ENOMEM;
132                 goto out;
133         }
134
135         memcpy(wl->nvs, fw->data, wl->nvs_len);
136
137         ret = 0;
138
139 out:
140         release_firmware(fw);
141
142         return ret;
143 }
144
145 static void wl1251_fw_wakeup(struct wl1251 *wl)
146 {
147         u32 elp_reg;
148
149         elp_reg = ELPCTRL_WAKE_UP;
150         wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
151         elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
152
153         if (!(elp_reg & ELPCTRL_WLAN_READY))
154                 wl1251_warning("WLAN not ready");
155 }
156
157 static int wl1251_chip_wakeup(struct wl1251 *wl)
158 {
159         int ret = 0;
160
161         wl1251_power_on(wl);
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 10
217 static void wl1251_irq_work(struct work_struct *work)
218 {
219         u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
220         struct wl1251 *wl =
221                 container_of(work, struct wl1251, irq_work);
222         int ret;
223
224         mutex_lock(&wl->mutex);
225
226         wl1251_debug(DEBUG_IRQ, "IRQ work");
227
228         if (wl->state == WL1251_STATE_OFF)
229                 goto out;
230
231         ret = wl1251_ps_elp_wakeup(wl);
232         if (ret < 0)
233                 goto out;
234
235         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
236
237         intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
238         wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
239
240         do {
241                 if (wl->data_path) {
242                         wl->rx_counter = wl1251_mem_read32(
243                                 wl, wl->data_path->rx_control_addr);
244
245                         /* We handle a frmware bug here */
246                         switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
247                         case 0:
248                                 wl1251_debug(DEBUG_IRQ,
249                                              "RX: FW and host in sync");
250                                 intr &= ~WL1251_ACX_INTR_RX0_DATA;
251                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
252                                 break;
253                         case 1:
254                                 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
255                                 intr |= WL1251_ACX_INTR_RX0_DATA;
256                                 intr &= ~WL1251_ACX_INTR_RX1_DATA;
257                                 break;
258                         case 2:
259                                 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
260                                 intr |= WL1251_ACX_INTR_RX0_DATA;
261                                 intr |= WL1251_ACX_INTR_RX1_DATA;
262                                 break;
263                         default:
264                                 wl1251_warning(
265                                         "RX: FW and host out of sync: %d",
266                                         wl->rx_counter - wl->rx_handled);
267                                 break;
268                         }
269
270                         wl->rx_handled = wl->rx_counter;
271
272                         wl1251_debug(DEBUG_IRQ, "RX counter: %d",
273                                      wl->rx_counter);
274                 }
275
276                 intr &= wl->intr_mask;
277
278                 if (intr == 0) {
279                         wl1251_debug(DEBUG_IRQ, "INTR is 0");
280                         goto out_sleep;
281                 }
282
283                 if (intr & WL1251_ACX_INTR_RX0_DATA) {
284                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
285                         wl1251_rx(wl);
286                 }
287
288                 if (intr & WL1251_ACX_INTR_RX1_DATA) {
289                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
290                         wl1251_rx(wl);
291                 }
292
293                 if (intr & WL1251_ACX_INTR_TX_RESULT) {
294                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
295                         wl1251_tx_complete(wl);
296                 }
297
298                 if (intr & (WL1251_ACX_INTR_EVENT_A |
299                             WL1251_ACX_INTR_EVENT_B)) {
300                         wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
301                                      intr);
302                         if (intr & WL1251_ACX_INTR_EVENT_A)
303                                 wl1251_event_handle(wl, 0);
304                         else
305                                 wl1251_event_handle(wl, 1);
306                 }
307
308                 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
309                         wl1251_debug(DEBUG_IRQ,
310                                      "WL1251_ACX_INTR_INIT_COMPLETE");
311
312                 if (--ctr == 0)
313                         break;
314
315                 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
316         } while (intr);
317
318 out_sleep:
319         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
320         wl1251_ps_elp_sleep(wl);
321
322 out:
323         mutex_unlock(&wl->mutex);
324 }
325
326 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
327                        u16 beacon_interval, u8 dtim_period)
328 {
329         int ret;
330
331         ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
332                                      DEFAULT_HW_GEN_MODULATION_TYPE,
333                                      wl->tx_mgmt_frm_rate,
334                                      wl->tx_mgmt_frm_mod);
335         if (ret < 0)
336                 goto out;
337
338
339         ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
340                               dtim_period);
341         if (ret < 0)
342                 goto out;
343
344         /*
345          * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
346          * locking we just sleep instead, for now
347          */
348         msleep(10);
349
350 out:
351         return ret;
352 }
353
354 static void wl1251_filter_work(struct work_struct *work)
355 {
356         struct wl1251 *wl =
357                 container_of(work, struct wl1251, filter_work);
358         int ret;
359
360         mutex_lock(&wl->mutex);
361
362         if (wl->state == WL1251_STATE_OFF)
363                 goto out;
364
365         ret = wl1251_ps_elp_wakeup(wl);
366         if (ret < 0)
367                 goto out;
368
369         ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
370                           wl->dtim_period);
371         if (ret < 0)
372                 goto out_sleep;
373
374 out_sleep:
375         wl1251_ps_elp_sleep(wl);
376
377 out:
378         mutex_unlock(&wl->mutex);
379 }
380
381 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
382 {
383         struct wl1251 *wl = hw->priv;
384
385         skb_queue_tail(&wl->tx_queue, skb);
386
387         /*
388          * The chip specific setup must run before the first TX packet -
389          * before that, the tx_work will not be initialized!
390          */
391
392         ieee80211_queue_work(wl->hw, &wl->tx_work);
393
394         /*
395          * The workqueue is slow to process the tx_queue and we need stop
396          * the queue here, otherwise the queue will get too long.
397          */
398         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
399                 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
400                 ieee80211_stop_queues(wl->hw);
401
402                 /*
403                  * FIXME: this is racy, the variable is not properly
404                  * protected. Maybe fix this by removing the stupid
405                  * variable altogether and checking the real queue state?
406                  */
407                 wl->tx_queue_stopped = true;
408         }
409
410         return NETDEV_TX_OK;
411 }
412
413 static int wl1251_op_start(struct ieee80211_hw *hw)
414 {
415         struct wl1251 *wl = hw->priv;
416         int ret = 0;
417
418         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
419
420         mutex_lock(&wl->mutex);
421
422         if (wl->state != WL1251_STATE_OFF) {
423                 wl1251_error("cannot start because not in off state: %d",
424                              wl->state);
425                 ret = -EBUSY;
426                 goto out;
427         }
428
429         ret = wl1251_chip_wakeup(wl);
430         if (ret < 0)
431                 goto out;
432
433         ret = wl1251_boot(wl);
434         if (ret < 0)
435                 goto out;
436
437         ret = wl1251_hw_init(wl);
438         if (ret < 0)
439                 goto out;
440
441         ret = wl1251_acx_station_id(wl);
442         if (ret < 0)
443                 goto out;
444
445         wl->state = WL1251_STATE_ON;
446
447         wl1251_info("firmware booted (%s)", wl->fw_ver);
448
449 out:
450         if (ret < 0)
451                 wl1251_power_off(wl);
452
453         mutex_unlock(&wl->mutex);
454
455         return ret;
456 }
457
458 static void wl1251_op_stop(struct ieee80211_hw *hw)
459 {
460         struct wl1251 *wl = hw->priv;
461
462         wl1251_info("down");
463
464         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
465
466         mutex_lock(&wl->mutex);
467
468         WARN_ON(wl->state != WL1251_STATE_ON);
469
470         if (wl->scanning) {
471                 mutex_unlock(&wl->mutex);
472                 ieee80211_scan_completed(wl->hw, true);
473                 mutex_lock(&wl->mutex);
474                 wl->scanning = false;
475         }
476
477         wl->state = WL1251_STATE_OFF;
478
479         wl1251_disable_interrupts(wl);
480
481         mutex_unlock(&wl->mutex);
482
483         cancel_work_sync(&wl->irq_work);
484         cancel_work_sync(&wl->tx_work);
485         cancel_work_sync(&wl->filter_work);
486
487         mutex_lock(&wl->mutex);
488
489         /* let's notify MAC80211 about the remaining pending TX frames */
490         wl1251_tx_flush(wl);
491         wl1251_power_off(wl);
492
493         memset(wl->bssid, 0, ETH_ALEN);
494         wl->listen_int = 1;
495         wl->bss_type = MAX_BSS_TYPE;
496
497         wl->data_in_count = 0;
498         wl->rx_counter = 0;
499         wl->rx_handled = 0;
500         wl->rx_current_buffer = 0;
501         wl->rx_last_id = 0;
502         wl->next_tx_complete = 0;
503         wl->elp = false;
504         wl->psm = 0;
505         wl->tx_queue_stopped = false;
506         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
507         wl->channel = WL1251_DEFAULT_CHANNEL;
508
509         wl1251_debugfs_reset(wl);
510
511         mutex_unlock(&wl->mutex);
512 }
513
514 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
515                                    struct ieee80211_vif *vif)
516 {
517         struct wl1251 *wl = hw->priv;
518         int ret = 0;
519
520         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
521                      vif->type, vif->addr);
522
523         mutex_lock(&wl->mutex);
524         if (wl->vif) {
525                 ret = -EBUSY;
526                 goto out;
527         }
528
529         wl->vif = vif;
530
531         switch (vif->type) {
532         case NL80211_IFTYPE_STATION:
533                 wl->bss_type = BSS_TYPE_STA_BSS;
534                 break;
535         case NL80211_IFTYPE_ADHOC:
536                 wl->bss_type = BSS_TYPE_IBSS;
537                 break;
538         default:
539                 ret = -EOPNOTSUPP;
540                 goto out;
541         }
542
543         if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
544                 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
545                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
546                 ret = wl1251_acx_station_id(wl);
547                 if (ret < 0)
548                         goto out;
549         }
550
551 out:
552         mutex_unlock(&wl->mutex);
553         return ret;
554 }
555
556 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
557                                          struct ieee80211_vif *vif)
558 {
559         struct wl1251 *wl = hw->priv;
560
561         mutex_lock(&wl->mutex);
562         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
563         wl->vif = NULL;
564         mutex_unlock(&wl->mutex);
565 }
566
567 static int wl1251_build_qos_null_data(struct wl1251 *wl)
568 {
569         struct ieee80211_qos_hdr template;
570
571         memset(&template, 0, sizeof(template));
572
573         memcpy(template.addr1, wl->bssid, ETH_ALEN);
574         memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
575         memcpy(template.addr3, wl->bssid, ETH_ALEN);
576
577         template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
578                                              IEEE80211_STYPE_QOS_NULLFUNC |
579                                              IEEE80211_FCTL_TODS);
580
581         /* FIXME: not sure what priority to use here */
582         template.qos_ctrl = cpu_to_le16(0);
583
584         return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
585                                        sizeof(template));
586 }
587
588 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
589 {
590         struct wl1251 *wl = hw->priv;
591         struct ieee80211_conf *conf = &hw->conf;
592         int channel, ret = 0;
593
594         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
595
596         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
597                      channel,
598                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
599                      conf->power_level);
600
601         mutex_lock(&wl->mutex);
602
603         ret = wl1251_ps_elp_wakeup(wl);
604         if (ret < 0)
605                 goto out;
606
607         if (channel != wl->channel) {
608                 wl->channel = channel;
609
610                 ret = wl1251_join(wl, wl->bss_type, wl->channel,
611                                   wl->beacon_int, wl->dtim_period);
612                 if (ret < 0)
613                         goto out_sleep;
614         }
615
616         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
617                 wl1251_debug(DEBUG_PSM, "psm enabled");
618
619                 wl->psm_requested = true;
620
621                 wl->dtim_period = conf->ps_dtim_period;
622
623                 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
624                                                   wl->dtim_period);
625
626                 /*
627                  * mac80211 enables PSM only if we're already associated.
628                  */
629                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
630                 if (ret < 0)
631                         goto out_sleep;
632         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
633                    wl->psm_requested) {
634                 wl1251_debug(DEBUG_PSM, "psm disabled");
635
636                 wl->psm_requested = false;
637
638                 if (wl->psm) {
639                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
640                         if (ret < 0)
641                                 goto out_sleep;
642                 }
643         }
644
645         if (conf->power_level != wl->power_level) {
646                 ret = wl1251_acx_tx_power(wl, conf->power_level);
647                 if (ret < 0)
648                         goto out_sleep;
649
650                 wl->power_level = conf->power_level;
651         }
652
653 out_sleep:
654         wl1251_ps_elp_sleep(wl);
655
656 out:
657         mutex_unlock(&wl->mutex);
658
659         return ret;
660 }
661
662 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
663                                   FIF_ALLMULTI | \
664                                   FIF_FCSFAIL | \
665                                   FIF_BCN_PRBRESP_PROMISC | \
666                                   FIF_CONTROL | \
667                                   FIF_OTHER_BSS)
668
669 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
670                                        unsigned int changed,
671                                        unsigned int *total,u64 multicast)
672 {
673         struct wl1251 *wl = hw->priv;
674
675         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
676
677         *total &= WL1251_SUPPORTED_FILTERS;
678         changed &= WL1251_SUPPORTED_FILTERS;
679
680         if (changed == 0)
681                 /* no filters which we support changed */
682                 return;
683
684         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
685
686         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
687         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
688
689         if (*total & FIF_PROMISC_IN_BSS) {
690                 wl->rx_config |= CFG_BSSID_FILTER_EN;
691                 wl->rx_config |= CFG_RX_ALL_GOOD;
692         }
693         if (*total & FIF_ALLMULTI)
694                 /*
695                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
696                  * all multicast frames
697                  */
698                 wl->rx_config &= ~CFG_MC_FILTER_EN;
699         if (*total & FIF_FCSFAIL)
700                 wl->rx_filter |= CFG_RX_FCS_ERROR;
701         if (*total & FIF_BCN_PRBRESP_PROMISC) {
702                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
703                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
704         }
705         if (*total & FIF_CONTROL)
706                 wl->rx_filter |= CFG_RX_CTL_EN;
707         if (*total & FIF_OTHER_BSS)
708                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
709
710         /*
711          * FIXME: workqueues need to be properly cancelled on stop(), for
712          * now let's just disable changing the filter settings. They will
713          * be updated any on config().
714          */
715         /* schedule_work(&wl->filter_work); */
716 }
717
718 /* HW encryption */
719 static int wl1251_set_key_type(struct wl1251 *wl,
720                                struct wl1251_cmd_set_keys *key,
721                                enum set_key_cmd cmd,
722                                struct ieee80211_key_conf *mac80211_key,
723                                const u8 *addr)
724 {
725         switch (mac80211_key->alg) {
726         case ALG_WEP:
727                 if (is_broadcast_ether_addr(addr))
728                         key->key_type = KEY_WEP_DEFAULT;
729                 else
730                         key->key_type = KEY_WEP_ADDR;
731
732                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
733                 break;
734         case ALG_TKIP:
735                 if (is_broadcast_ether_addr(addr))
736                         key->key_type = KEY_TKIP_MIC_GROUP;
737                 else
738                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
739
740                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
741                 break;
742         case ALG_CCMP:
743                 if (is_broadcast_ether_addr(addr))
744                         key->key_type = KEY_AES_GROUP;
745                 else
746                         key->key_type = KEY_AES_PAIRWISE;
747                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
748                 break;
749         default:
750                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
751                 return -EOPNOTSUPP;
752         }
753
754         return 0;
755 }
756
757 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
758                              struct ieee80211_vif *vif,
759                              struct ieee80211_sta *sta,
760                              struct ieee80211_key_conf *key)
761 {
762         struct wl1251 *wl = hw->priv;
763         struct wl1251_cmd_set_keys *wl_cmd;
764         const u8 *addr;
765         int ret;
766
767         static const u8 bcast_addr[ETH_ALEN] =
768                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
769
770         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
771
772         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
773         if (!wl_cmd) {
774                 ret = -ENOMEM;
775                 goto out;
776         }
777
778         addr = sta ? sta->addr : bcast_addr;
779
780         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
781         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
782         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
783                      key->alg, key->keyidx, key->keylen, key->flags);
784         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
785
786         if (is_zero_ether_addr(addr)) {
787                 /* We dont support TX only encryption */
788                 ret = -EOPNOTSUPP;
789                 goto out;
790         }
791
792         mutex_lock(&wl->mutex);
793
794         ret = wl1251_ps_elp_wakeup(wl);
795         if (ret < 0)
796                 goto out_unlock;
797
798         switch (cmd) {
799         case SET_KEY:
800                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
801                 break;
802         case DISABLE_KEY:
803                 wl_cmd->key_action = KEY_REMOVE;
804                 break;
805         default:
806                 wl1251_error("Unsupported key cmd 0x%x", cmd);
807                 break;
808         }
809
810         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
811         if (ret < 0) {
812                 wl1251_error("Set KEY type failed");
813                 goto out_sleep;
814         }
815
816         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
817                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
818
819         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
820             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
821                 /*
822                  * We get the key in the following form:
823                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
824                  * but the target is expecting:
825                  * TKIP - RX MIC - TX MIC
826                  */
827                 memcpy(wl_cmd->key, key->key, 16);
828                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
829                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
830
831         } else {
832                 memcpy(wl_cmd->key, key->key, key->keylen);
833         }
834         wl_cmd->key_size = key->keylen;
835
836         wl_cmd->id = key->keyidx;
837         wl_cmd->ssid_profile = 0;
838
839         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
840
841         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
842         if (ret < 0) {
843                 wl1251_warning("could not set keys");
844                 goto out_sleep;
845         }
846
847 out_sleep:
848         wl1251_ps_elp_sleep(wl);
849
850 out_unlock:
851         mutex_unlock(&wl->mutex);
852
853 out:
854         kfree(wl_cmd);
855
856         return ret;
857 }
858
859 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
860                              struct cfg80211_scan_request *req)
861 {
862         struct wl1251 *wl = hw->priv;
863         struct sk_buff *skb;
864         size_t ssid_len = 0;
865         u8 *ssid = NULL;
866         int ret;
867
868         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
869
870         if (req->n_ssids) {
871                 ssid = req->ssids[0].ssid;
872                 ssid_len = req->ssids[0].ssid_len;
873         }
874
875         mutex_lock(&wl->mutex);
876
877         if (wl->scanning) {
878                 wl1251_debug(DEBUG_SCAN, "scan already in progress");
879                 ret = -EINVAL;
880                 goto out;
881         }
882
883         ret = wl1251_ps_elp_wakeup(wl);
884         if (ret < 0)
885                 goto out;
886
887         skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
888                                      req->ie, req->ie_len);
889         if (!skb) {
890                 ret = -ENOMEM;
891                 goto out;
892         }
893
894         ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
895                                       skb->len);
896         dev_kfree_skb(skb);
897         if (ret < 0)
898                 goto out_sleep;
899
900         ret = wl1251_cmd_trigger_scan_to(wl, 0);
901         if (ret < 0)
902                 goto out_sleep;
903
904         wl->scanning = true;
905
906         ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
907                               req->n_channels, WL1251_SCAN_NUM_PROBES);
908         if (ret < 0) {
909                 wl->scanning = false;
910                 goto out_sleep;
911         }
912
913 out_sleep:
914         wl1251_ps_elp_sleep(wl);
915
916 out:
917         mutex_unlock(&wl->mutex);
918
919         return ret;
920 }
921
922 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
923 {
924         struct wl1251 *wl = hw->priv;
925         int ret;
926
927         mutex_lock(&wl->mutex);
928
929         ret = wl1251_ps_elp_wakeup(wl);
930         if (ret < 0)
931                 goto out;
932
933         ret = wl1251_acx_rts_threshold(wl, (u16) value);
934         if (ret < 0)
935                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
936
937         wl1251_ps_elp_sleep(wl);
938
939 out:
940         mutex_unlock(&wl->mutex);
941
942         return ret;
943 }
944
945 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
946                                        struct ieee80211_vif *vif,
947                                        struct ieee80211_bss_conf *bss_conf,
948                                        u32 changed)
949 {
950         struct wl1251 *wl = hw->priv;
951         struct sk_buff *beacon, *skb;
952         int ret;
953
954         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
955
956         mutex_lock(&wl->mutex);
957
958         ret = wl1251_ps_elp_wakeup(wl);
959         if (ret < 0)
960                 goto out;
961
962         if (changed & BSS_CHANGED_BSSID) {
963                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
964
965                 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
966                 if (!skb)
967                         goto out_sleep;
968
969                 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
970                                               skb->data, skb->len);
971                 dev_kfree_skb(skb);
972                 if (ret < 0)
973                         goto out_sleep;
974
975                 ret = wl1251_build_qos_null_data(wl);
976                 if (ret < 0)
977                         goto out;
978
979                 if (wl->bss_type != BSS_TYPE_IBSS) {
980                         ret = wl1251_join(wl, wl->bss_type, wl->channel,
981                                           wl->beacon_int, wl->dtim_period);
982                         if (ret < 0)
983                                 goto out_sleep;
984                 }
985         }
986
987         if (changed & BSS_CHANGED_ASSOC) {
988                 if (bss_conf->assoc) {
989                         wl->beacon_int = bss_conf->beacon_int;
990
991                         skb = ieee80211_pspoll_get(wl->hw, wl->vif);
992                         if (!skb)
993                                 goto out_sleep;
994
995                         ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
996                                                       skb->data,
997                                                       skb->len);
998                         dev_kfree_skb(skb);
999                         if (ret < 0)
1000                                 goto out_sleep;
1001
1002                         ret = wl1251_acx_aid(wl, bss_conf->aid);
1003                         if (ret < 0)
1004                                 goto out_sleep;
1005                 } else {
1006                         /* use defaults when not associated */
1007                         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1008                         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1009                 }
1010         }
1011         if (changed & BSS_CHANGED_ERP_SLOT) {
1012                 if (bss_conf->use_short_slot)
1013                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1014                 else
1015                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1016                 if (ret < 0) {
1017                         wl1251_warning("Set slot time failed %d", ret);
1018                         goto out_sleep;
1019                 }
1020         }
1021
1022         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1023                 if (bss_conf->use_short_preamble)
1024                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1025                 else
1026                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1027         }
1028
1029         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1030                 if (bss_conf->use_cts_prot)
1031                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1032                 else
1033                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1034                 if (ret < 0) {
1035                         wl1251_warning("Set ctsprotect failed %d", ret);
1036                         goto out_sleep;
1037                 }
1038         }
1039
1040         if (changed & BSS_CHANGED_BEACON) {
1041                 beacon = ieee80211_beacon_get(hw, vif);
1042                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1043                                               beacon->len);
1044
1045                 if (ret < 0) {
1046                         dev_kfree_skb(beacon);
1047                         goto out_sleep;
1048                 }
1049
1050                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1051                                               beacon->len);
1052
1053                 dev_kfree_skb(beacon);
1054
1055                 if (ret < 0)
1056                         goto out_sleep;
1057
1058                 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1059                                   wl->channel, wl->dtim_period);
1060
1061                 if (ret < 0)
1062                         goto out_sleep;
1063         }
1064
1065 out_sleep:
1066         wl1251_ps_elp_sleep(wl);
1067
1068 out:
1069         mutex_unlock(&wl->mutex);
1070 }
1071
1072
1073 /* can't be const, mac80211 writes to this */
1074 static struct ieee80211_rate wl1251_rates[] = {
1075         { .bitrate = 10,
1076           .hw_value = 0x1,
1077           .hw_value_short = 0x1, },
1078         { .bitrate = 20,
1079           .hw_value = 0x2,
1080           .hw_value_short = 0x2,
1081           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1082         { .bitrate = 55,
1083           .hw_value = 0x4,
1084           .hw_value_short = 0x4,
1085           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1086         { .bitrate = 110,
1087           .hw_value = 0x20,
1088           .hw_value_short = 0x20,
1089           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1090         { .bitrate = 60,
1091           .hw_value = 0x8,
1092           .hw_value_short = 0x8, },
1093         { .bitrate = 90,
1094           .hw_value = 0x10,
1095           .hw_value_short = 0x10, },
1096         { .bitrate = 120,
1097           .hw_value = 0x40,
1098           .hw_value_short = 0x40, },
1099         { .bitrate = 180,
1100           .hw_value = 0x80,
1101           .hw_value_short = 0x80, },
1102         { .bitrate = 240,
1103           .hw_value = 0x200,
1104           .hw_value_short = 0x200, },
1105         { .bitrate = 360,
1106          .hw_value = 0x400,
1107          .hw_value_short = 0x400, },
1108         { .bitrate = 480,
1109           .hw_value = 0x800,
1110           .hw_value_short = 0x800, },
1111         { .bitrate = 540,
1112           .hw_value = 0x1000,
1113           .hw_value_short = 0x1000, },
1114 };
1115
1116 /* can't be const, mac80211 writes to this */
1117 static struct ieee80211_channel wl1251_channels[] = {
1118         { .hw_value = 1, .center_freq = 2412},
1119         { .hw_value = 2, .center_freq = 2417},
1120         { .hw_value = 3, .center_freq = 2422},
1121         { .hw_value = 4, .center_freq = 2427},
1122         { .hw_value = 5, .center_freq = 2432},
1123         { .hw_value = 6, .center_freq = 2437},
1124         { .hw_value = 7, .center_freq = 2442},
1125         { .hw_value = 8, .center_freq = 2447},
1126         { .hw_value = 9, .center_freq = 2452},
1127         { .hw_value = 10, .center_freq = 2457},
1128         { .hw_value = 11, .center_freq = 2462},
1129         { .hw_value = 12, .center_freq = 2467},
1130         { .hw_value = 13, .center_freq = 2472},
1131 };
1132
1133 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1134                              const struct ieee80211_tx_queue_params *params)
1135 {
1136         enum wl1251_acx_ps_scheme ps_scheme;
1137         struct wl1251 *wl = hw->priv;
1138         int ret;
1139
1140         mutex_lock(&wl->mutex);
1141
1142         wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1143
1144         ret = wl1251_ps_elp_wakeup(wl);
1145         if (ret < 0)
1146                 goto out;
1147
1148         /* mac80211 uses units of 32 usec */
1149         ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1150                                 params->cw_min, params->cw_max,
1151                                 params->aifs, params->txop * 32);
1152         if (ret < 0)
1153                 goto out_sleep;
1154
1155         if (params->uapsd)
1156                 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1157         else
1158                 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1159
1160         ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1161                                  CHANNEL_TYPE_EDCF,
1162                                  wl1251_tx_get_queue(queue), ps_scheme,
1163                                  WL1251_ACX_ACK_POLICY_LEGACY);
1164         if (ret < 0)
1165                 goto out_sleep;
1166
1167 out_sleep:
1168         wl1251_ps_elp_sleep(wl);
1169
1170 out:
1171         mutex_unlock(&wl->mutex);
1172
1173         return ret;
1174 }
1175
1176 /* can't be const, mac80211 writes to this */
1177 static struct ieee80211_supported_band wl1251_band_2ghz = {
1178         .channels = wl1251_channels,
1179         .n_channels = ARRAY_SIZE(wl1251_channels),
1180         .bitrates = wl1251_rates,
1181         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1182 };
1183
1184 static const struct ieee80211_ops wl1251_ops = {
1185         .start = wl1251_op_start,
1186         .stop = wl1251_op_stop,
1187         .add_interface = wl1251_op_add_interface,
1188         .remove_interface = wl1251_op_remove_interface,
1189         .config = wl1251_op_config,
1190         .configure_filter = wl1251_op_configure_filter,
1191         .tx = wl1251_op_tx,
1192         .set_key = wl1251_op_set_key,
1193         .hw_scan = wl1251_op_hw_scan,
1194         .bss_info_changed = wl1251_op_bss_info_changed,
1195         .set_rts_threshold = wl1251_op_set_rts_threshold,
1196         .conf_tx = wl1251_op_conf_tx,
1197 };
1198
1199 static int wl1251_register_hw(struct wl1251 *wl)
1200 {
1201         int ret;
1202
1203         if (wl->mac80211_registered)
1204                 return 0;
1205
1206         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1207
1208         ret = ieee80211_register_hw(wl->hw);
1209         if (ret < 0) {
1210                 wl1251_error("unable to register mac80211 hw: %d", ret);
1211                 return ret;
1212         }
1213
1214         wl->mac80211_registered = true;
1215
1216         wl1251_notice("loaded");
1217
1218         return 0;
1219 }
1220
1221 int wl1251_init_ieee80211(struct wl1251 *wl)
1222 {
1223         int ret;
1224
1225         /* The tx descriptor buffer and the TKIP space */
1226         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1227                 + WL1251_TKIP_IV_SPACE;
1228
1229         /* unit us */
1230         /* FIXME: find a proper value */
1231         wl->hw->channel_change_time = 10000;
1232
1233         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1234                 IEEE80211_HW_NOISE_DBM |
1235                 IEEE80211_HW_SUPPORTS_PS |
1236                 IEEE80211_HW_BEACON_FILTER |
1237                 IEEE80211_HW_SUPPORTS_UAPSD;
1238
1239         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1240         wl->hw->wiphy->max_scan_ssids = 1;
1241         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1242
1243         wl->hw->queues = 4;
1244
1245         ret = wl1251_register_hw(wl);
1246         if (ret)
1247                 goto out;
1248
1249         wl1251_debugfs_init(wl);
1250         wl1251_notice("initialized");
1251
1252         ret = 0;
1253
1254 out:
1255         return ret;
1256 }
1257 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1258
1259 struct ieee80211_hw *wl1251_alloc_hw(void)
1260 {
1261         struct ieee80211_hw *hw;
1262         struct wl1251 *wl;
1263         int i;
1264         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1265
1266         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1267         if (!hw) {
1268                 wl1251_error("could not alloc ieee80211_hw");
1269                 return ERR_PTR(-ENOMEM);
1270         }
1271
1272         wl = hw->priv;
1273         memset(wl, 0, sizeof(*wl));
1274
1275         wl->hw = hw;
1276
1277         wl->data_in_count = 0;
1278
1279         skb_queue_head_init(&wl->tx_queue);
1280
1281         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1282         INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1283         wl->channel = WL1251_DEFAULT_CHANNEL;
1284         wl->scanning = false;
1285         wl->default_key = 0;
1286         wl->listen_int = 1;
1287         wl->rx_counter = 0;
1288         wl->rx_handled = 0;
1289         wl->rx_current_buffer = 0;
1290         wl->rx_last_id = 0;
1291         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1292         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1293         wl->elp = false;
1294         wl->psm = 0;
1295         wl->psm_requested = false;
1296         wl->tx_queue_stopped = false;
1297         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1298         wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1299         wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1300         wl->vif = NULL;
1301
1302         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1303                 wl->tx_frames[i] = NULL;
1304
1305         wl->next_tx_complete = 0;
1306
1307         INIT_WORK(&wl->irq_work, wl1251_irq_work);
1308         INIT_WORK(&wl->tx_work, wl1251_tx_work);
1309
1310         /*
1311          * In case our MAC address is not correctly set,
1312          * we use a random but Nokia MAC.
1313          */
1314         memcpy(wl->mac_addr, nokia_oui, 3);
1315         get_random_bytes(wl->mac_addr + 3, 3);
1316
1317         wl->state = WL1251_STATE_OFF;
1318         mutex_init(&wl->mutex);
1319
1320         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1321         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1322
1323         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1324         if (!wl->rx_descriptor) {
1325                 wl1251_error("could not allocate memory for rx descriptor");
1326                 ieee80211_free_hw(hw);
1327                 return ERR_PTR(-ENOMEM);
1328         }
1329
1330         return hw;
1331 }
1332 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1333
1334 int wl1251_free_hw(struct wl1251 *wl)
1335 {
1336         ieee80211_unregister_hw(wl->hw);
1337
1338         wl1251_debugfs_exit(wl);
1339
1340         kfree(wl->target_mem_map);
1341         kfree(wl->data_path);
1342         vfree(wl->fw);
1343         wl->fw = NULL;
1344         kfree(wl->nvs);
1345         wl->nvs = NULL;
1346
1347         kfree(wl->rx_descriptor);
1348         wl->rx_descriptor = NULL;
1349
1350         ieee80211_free_hw(wl->hw);
1351
1352         return 0;
1353 }
1354 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1355
1356 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1357 MODULE_LICENSE("GPL");
1358 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1359 MODULE_ALIAS("spi:wl1251");
1360 MODULE_FIRMWARE(WL1251_FW_NAME);