wl1251: make irq handling interface specific
[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
32 #include "wl1251.h"
33 #include "wl12xx_80211.h"
34 #include "reg.h"
35 #include "wl1251_ops.h"
36 #include "wl1251_io.h"
37 #include "wl1251_cmd.h"
38 #include "wl1251_event.h"
39 #include "wl1251_tx.h"
40 #include "wl1251_rx.h"
41 #include "wl1251_ps.h"
42 #include "wl1251_init.h"
43 #include "wl1251_debugfs.h"
44
45 void wl1251_enable_interrupts(struct wl1251 *wl)
46 {
47         wl->if_ops->enable_irq(wl);
48 }
49
50 void wl1251_disable_interrupts(struct wl1251 *wl)
51 {
52         wl->if_ops->disable_irq(wl);
53 }
54
55 static void wl1251_power_off(struct wl1251 *wl)
56 {
57         wl->set_power(false);
58 }
59
60 static void wl1251_power_on(struct wl1251 *wl)
61 {
62         wl->set_power(true);
63 }
64
65 static int wl1251_fetch_firmware(struct wl1251 *wl)
66 {
67         const struct firmware *fw;
68         struct device *dev = wiphy_dev(wl->hw->wiphy);
69         int ret;
70
71         ret = request_firmware(&fw, wl->chip.fw_filename, dev);
72
73         if (ret < 0) {
74                 wl1251_error("could not get firmware: %d", ret);
75                 return ret;
76         }
77
78         if (fw->size % 4) {
79                 wl1251_error("firmware size is not multiple of 32 bits: %zu",
80                              fw->size);
81                 ret = -EILSEQ;
82                 goto out;
83         }
84
85         wl->fw_len = fw->size;
86         wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
87
88         if (!wl->fw) {
89                 wl1251_error("could not allocate memory for the firmware");
90                 ret = -ENOMEM;
91                 goto out;
92         }
93
94         memcpy(wl->fw, fw->data, wl->fw_len);
95
96         ret = 0;
97
98 out:
99         release_firmware(fw);
100
101         return ret;
102 }
103
104 static int wl1251_fetch_nvs(struct wl1251 *wl)
105 {
106         const struct firmware *fw;
107         struct device *dev = wiphy_dev(wl->hw->wiphy);
108         int ret;
109
110         ret = request_firmware(&fw, wl->chip.nvs_filename, dev);
111
112         if (ret < 0) {
113                 wl1251_error("could not get nvs file: %d", ret);
114                 return ret;
115         }
116
117         if (fw->size % 4) {
118                 wl1251_error("nvs size is not multiple of 32 bits: %zu",
119                              fw->size);
120                 ret = -EILSEQ;
121                 goto out;
122         }
123
124         wl->nvs_len = fw->size;
125         wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
126
127         if (!wl->nvs) {
128                 wl1251_error("could not allocate memory for the nvs file");
129                 ret = -ENOMEM;
130                 goto out;
131         }
132
133         memcpy(wl->nvs, fw->data, wl->nvs_len);
134
135         ret = 0;
136
137 out:
138         release_firmware(fw);
139
140         return ret;
141 }
142
143 static void wl1251_fw_wakeup(struct wl1251 *wl)
144 {
145         u32 elp_reg;
146
147         elp_reg = ELPCTRL_WAKE_UP;
148         wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
149         elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
150
151         if (!(elp_reg & ELPCTRL_WLAN_READY))
152                 wl1251_warning("WLAN not ready");
153 }
154
155 static int wl1251_chip_wakeup(struct wl1251 *wl)
156 {
157         int ret = 0;
158
159         wl1251_power_on(wl);
160         msleep(wl->chip.power_on_sleep);
161         wl->if_ops->reset(wl);
162
163         /* We don't need a real memory partition here, because we only want
164          * to use the registers at this point. */
165         wl1251_set_partition(wl,
166                              0x00000000,
167                              0x00000000,
168                              REGISTERS_BASE,
169                              REGISTERS_DOWN_SIZE);
170
171         /* ELP module wake up */
172         wl1251_fw_wakeup(wl);
173
174         /* whal_FwCtrl_BootSm() */
175
176         /* 0. read chip id from CHIP_ID */
177         wl->chip.id = wl1251_reg_read32(wl, CHIP_ID_B);
178
179         /* 1. check if chip id is valid */
180
181         switch (wl->chip.id) {
182         case CHIP_ID_1251_PG12:
183                 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
184                              wl->chip.id);
185
186                 wl1251_setup(wl);
187
188                 break;
189         case CHIP_ID_1251_PG10:
190         case CHIP_ID_1251_PG11:
191         default:
192                 wl1251_error("unsupported chip id: 0x%x", wl->chip.id);
193                 ret = -ENODEV;
194                 goto out;
195         }
196
197         if (wl->fw == NULL) {
198                 ret = wl1251_fetch_firmware(wl);
199                 if (ret < 0)
200                         goto out;
201         }
202
203         /* No NVS from netlink, try to get it from the filesystem */
204         if (wl->nvs == NULL) {
205                 ret = wl1251_fetch_nvs(wl);
206                 if (ret < 0)
207                         goto out;
208         }
209
210 out:
211         return ret;
212 }
213
214 static void wl1251_filter_work(struct work_struct *work)
215 {
216         struct wl1251 *wl =
217                 container_of(work, struct wl1251, filter_work);
218         int ret;
219
220         mutex_lock(&wl->mutex);
221
222         if (wl->state == WL1251_STATE_OFF)
223                 goto out;
224
225         ret = wl1251_ps_elp_wakeup(wl);
226         if (ret < 0)
227                 goto out;
228
229         /* FIXME: replace the magic numbers with proper definitions */
230         ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
231         if (ret < 0)
232                 goto out_sleep;
233
234 out_sleep:
235         wl1251_ps_elp_sleep(wl);
236
237 out:
238         mutex_unlock(&wl->mutex);
239 }
240
241 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
242 {
243         struct wl1251 *wl = hw->priv;
244
245         skb_queue_tail(&wl->tx_queue, skb);
246
247         /*
248          * The chip specific setup must run before the first TX packet -
249          * before that, the tx_work will not be initialized!
250          */
251
252         schedule_work(&wl->tx_work);
253
254         /*
255          * The workqueue is slow to process the tx_queue and we need stop
256          * the queue here, otherwise the queue will get too long.
257          */
258         if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
259                 ieee80211_stop_queues(wl->hw);
260
261                 /*
262                  * FIXME: this is racy, the variable is not properly
263                  * protected. Maybe fix this by removing the stupid
264                  * variable altogether and checking the real queue state?
265                  */
266                 wl->tx_queue_stopped = true;
267         }
268
269         return NETDEV_TX_OK;
270 }
271
272 static int wl1251_op_start(struct ieee80211_hw *hw)
273 {
274         struct wl1251 *wl = hw->priv;
275         int ret = 0;
276
277         wl1251_debug(DEBUG_MAC80211, "mac80211 start");
278
279         mutex_lock(&wl->mutex);
280
281         if (wl->state != WL1251_STATE_OFF) {
282                 wl1251_error("cannot start because not in off state: %d",
283                              wl->state);
284                 ret = -EBUSY;
285                 goto out;
286         }
287
288         ret = wl1251_chip_wakeup(wl);
289         if (ret < 0)
290                 goto out;
291
292         ret = wl->chip.op_boot(wl);
293         if (ret < 0)
294                 goto out;
295
296         ret = wl->chip.op_hw_init(wl);
297         if (ret < 0)
298                 goto out;
299
300         ret = wl1251_acx_station_id(wl);
301         if (ret < 0)
302                 goto out;
303
304         wl->state = WL1251_STATE_ON;
305
306         wl1251_info("firmware booted (%s)", wl->chip.fw_ver);
307
308 out:
309         if (ret < 0)
310                 wl1251_power_off(wl);
311
312         mutex_unlock(&wl->mutex);
313
314         return ret;
315 }
316
317 static void wl1251_op_stop(struct ieee80211_hw *hw)
318 {
319         struct wl1251 *wl = hw->priv;
320
321         wl1251_info("down");
322
323         wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
324
325         mutex_lock(&wl->mutex);
326
327         WARN_ON(wl->state != WL1251_STATE_ON);
328
329         if (wl->scanning) {
330                 mutex_unlock(&wl->mutex);
331                 ieee80211_scan_completed(wl->hw, true);
332                 mutex_lock(&wl->mutex);
333                 wl->scanning = false;
334         }
335
336         wl->state = WL1251_STATE_OFF;
337
338         wl1251_disable_interrupts(wl);
339
340         mutex_unlock(&wl->mutex);
341
342         cancel_work_sync(&wl->irq_work);
343         cancel_work_sync(&wl->tx_work);
344         cancel_work_sync(&wl->filter_work);
345
346         mutex_lock(&wl->mutex);
347
348         /* let's notify MAC80211 about the remaining pending TX frames */
349         wl->chip.op_tx_flush(wl);
350         wl1251_power_off(wl);
351
352         memset(wl->bssid, 0, ETH_ALEN);
353         wl->listen_int = 1;
354         wl->bss_type = MAX_BSS_TYPE;
355
356         wl->data_in_count = 0;
357         wl->rx_counter = 0;
358         wl->rx_handled = 0;
359         wl->rx_current_buffer = 0;
360         wl->rx_last_id = 0;
361         wl->next_tx_complete = 0;
362         wl->elp = false;
363         wl->psm = 0;
364         wl->tx_queue_stopped = false;
365         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
366
367         wl1251_debugfs_reset(wl);
368
369         mutex_unlock(&wl->mutex);
370 }
371
372 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
373                                    struct ieee80211_if_init_conf *conf)
374 {
375         struct wl1251 *wl = hw->priv;
376         int ret = 0;
377
378         wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
379                      conf->type, conf->mac_addr);
380
381         mutex_lock(&wl->mutex);
382
383         switch (conf->type) {
384         case NL80211_IFTYPE_STATION:
385                 wl->bss_type = BSS_TYPE_STA_BSS;
386                 break;
387         case NL80211_IFTYPE_ADHOC:
388                 wl->bss_type = BSS_TYPE_IBSS;
389                 break;
390         default:
391                 ret = -EOPNOTSUPP;
392                 goto out;
393         }
394
395         if (memcmp(wl->mac_addr, conf->mac_addr, ETH_ALEN)) {
396                 memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);
397                 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
398                 ret = wl1251_acx_station_id(wl);
399                 if (ret < 0)
400                         goto out;
401         }
402
403 out:
404         mutex_unlock(&wl->mutex);
405         return ret;
406 }
407
408 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
409                                          struct ieee80211_if_init_conf *conf)
410 {
411         wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
412 }
413
414 static int wl1251_build_null_data(struct wl1251 *wl)
415 {
416         struct wl12xx_null_data_template template;
417
418         if (!is_zero_ether_addr(wl->bssid)) {
419                 memcpy(template.header.da, wl->bssid, ETH_ALEN);
420                 memcpy(template.header.bssid, wl->bssid, ETH_ALEN);
421         } else {
422                 memset(template.header.da, 0xff, ETH_ALEN);
423                 memset(template.header.bssid, 0xff, ETH_ALEN);
424         }
425
426         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
427         template.header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_DATA |
428                                                 IEEE80211_STYPE_NULLFUNC);
429
430         return wl1251_cmd_template_set(wl, CMD_NULL_DATA, &template,
431                                        sizeof(template));
432
433 }
434
435 static int wl1251_build_ps_poll(struct wl1251 *wl, u16 aid)
436 {
437         struct wl12xx_ps_poll_template template;
438
439         memcpy(template.bssid, wl->bssid, ETH_ALEN);
440         memcpy(template.ta, wl->mac_addr, ETH_ALEN);
441         template.aid = aid;
442         template.fc = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
443
444         return wl1251_cmd_template_set(wl, CMD_PS_POLL, &template,
445                                        sizeof(template));
446
447 }
448
449 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
450 {
451         struct wl1251 *wl = hw->priv;
452         struct ieee80211_conf *conf = &hw->conf;
453         int channel, ret = 0;
454
455         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
456
457         wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
458                      channel,
459                      conf->flags & IEEE80211_CONF_PS ? "on" : "off",
460                      conf->power_level);
461
462         mutex_lock(&wl->mutex);
463
464         ret = wl1251_ps_elp_wakeup(wl);
465         if (ret < 0)
466                 goto out;
467
468         if (channel != wl->channel) {
469                 /* FIXME: use beacon interval provided by mac80211 */
470                 ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
471                 if (ret < 0)
472                         goto out_sleep;
473
474                 wl->channel = channel;
475         }
476
477         ret = wl1251_build_null_data(wl);
478         if (ret < 0)
479                 goto out_sleep;
480
481         if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
482                 wl1251_debug(DEBUG_PSM, "psm enabled");
483
484                 wl->psm_requested = true;
485
486                 /*
487                  * We enter PSM only if we're already associated.
488                  * If we're not, we'll enter it when joining an SSID,
489                  * through the bss_info_changed() hook.
490                  */
491                 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
492         } else if (!(conf->flags & IEEE80211_CONF_PS) &&
493                    wl->psm_requested) {
494                 wl1251_debug(DEBUG_PSM, "psm disabled");
495
496                 wl->psm_requested = false;
497
498                 if (wl->psm)
499                         ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
500         }
501
502         if (conf->power_level != wl->power_level) {
503                 ret = wl1251_acx_tx_power(wl, conf->power_level);
504                 if (ret < 0)
505                         goto out;
506
507                 wl->power_level = conf->power_level;
508         }
509
510 out_sleep:
511         wl1251_ps_elp_sleep(wl);
512
513 out:
514         mutex_unlock(&wl->mutex);
515
516         return ret;
517 }
518
519 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
520                                   FIF_ALLMULTI | \
521                                   FIF_FCSFAIL | \
522                                   FIF_BCN_PRBRESP_PROMISC | \
523                                   FIF_CONTROL | \
524                                   FIF_OTHER_BSS)
525
526 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
527                                        unsigned int changed,
528                                        unsigned int *total,
529                                        int mc_count,
530                                        struct dev_addr_list *mc_list)
531 {
532         struct wl1251 *wl = hw->priv;
533
534         wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
535
536         *total &= WL1251_SUPPORTED_FILTERS;
537         changed &= WL1251_SUPPORTED_FILTERS;
538
539         if (changed == 0)
540                 /* no filters which we support changed */
541                 return;
542
543         /* FIXME: wl->rx_config and wl->rx_filter are not protected */
544
545         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
546         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
547
548         if (*total & FIF_PROMISC_IN_BSS) {
549                 wl->rx_config |= CFG_BSSID_FILTER_EN;
550                 wl->rx_config |= CFG_RX_ALL_GOOD;
551         }
552         if (*total & FIF_ALLMULTI)
553                 /*
554                  * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
555                  * all multicast frames
556                  */
557                 wl->rx_config &= ~CFG_MC_FILTER_EN;
558         if (*total & FIF_FCSFAIL)
559                 wl->rx_filter |= CFG_RX_FCS_ERROR;
560         if (*total & FIF_BCN_PRBRESP_PROMISC) {
561                 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
562                 wl->rx_config &= ~CFG_SSID_FILTER_EN;
563         }
564         if (*total & FIF_CONTROL)
565                 wl->rx_filter |= CFG_RX_CTL_EN;
566         if (*total & FIF_OTHER_BSS)
567                 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
568
569         /*
570          * FIXME: workqueues need to be properly cancelled on stop(), for
571          * now let's just disable changing the filter settings. They will
572          * be updated any on config().
573          */
574         /* schedule_work(&wl->filter_work); */
575 }
576
577 /* HW encryption */
578 static int wl1251_set_key_type(struct wl1251 *wl,
579                                struct wl1251_cmd_set_keys *key,
580                                enum set_key_cmd cmd,
581                                struct ieee80211_key_conf *mac80211_key,
582                                const u8 *addr)
583 {
584         switch (mac80211_key->alg) {
585         case ALG_WEP:
586                 if (is_broadcast_ether_addr(addr))
587                         key->key_type = KEY_WEP_DEFAULT;
588                 else
589                         key->key_type = KEY_WEP_ADDR;
590
591                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
592                 break;
593         case ALG_TKIP:
594                 if (is_broadcast_ether_addr(addr))
595                         key->key_type = KEY_TKIP_MIC_GROUP;
596                 else
597                         key->key_type = KEY_TKIP_MIC_PAIRWISE;
598
599                 mac80211_key->hw_key_idx = mac80211_key->keyidx;
600                 break;
601         case ALG_CCMP:
602                 if (is_broadcast_ether_addr(addr))
603                         key->key_type = KEY_AES_GROUP;
604                 else
605                         key->key_type = KEY_AES_PAIRWISE;
606                 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
607                 break;
608         default:
609                 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
610                 return -EOPNOTSUPP;
611         }
612
613         return 0;
614 }
615
616 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
617                              struct ieee80211_vif *vif,
618                              struct ieee80211_sta *sta,
619                              struct ieee80211_key_conf *key)
620 {
621         struct wl1251 *wl = hw->priv;
622         struct wl1251_cmd_set_keys *wl_cmd;
623         const u8 *addr;
624         int ret;
625
626         static const u8 bcast_addr[ETH_ALEN] =
627                 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
628
629         wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
630
631         wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
632         if (!wl_cmd) {
633                 ret = -ENOMEM;
634                 goto out;
635         }
636
637         addr = sta ? sta->addr : bcast_addr;
638
639         wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
640         wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
641         wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
642                      key->alg, key->keyidx, key->keylen, key->flags);
643         wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
644
645         if (is_zero_ether_addr(addr)) {
646                 /* We dont support TX only encryption */
647                 ret = -EOPNOTSUPP;
648                 goto out;
649         }
650
651         mutex_lock(&wl->mutex);
652
653         ret = wl1251_ps_elp_wakeup(wl);
654         if (ret < 0)
655                 goto out_unlock;
656
657         switch (cmd) {
658         case SET_KEY:
659                 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
660                 break;
661         case DISABLE_KEY:
662                 wl_cmd->key_action = KEY_REMOVE;
663                 break;
664         default:
665                 wl1251_error("Unsupported key cmd 0x%x", cmd);
666                 break;
667         }
668
669         ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
670         if (ret < 0) {
671                 wl1251_error("Set KEY type failed");
672                 goto out_sleep;
673         }
674
675         if (wl_cmd->key_type != KEY_WEP_DEFAULT)
676                 memcpy(wl_cmd->addr, addr, ETH_ALEN);
677
678         if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
679             (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
680                 /*
681                  * We get the key in the following form:
682                  * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
683                  * but the target is expecting:
684                  * TKIP - RX MIC - TX MIC
685                  */
686                 memcpy(wl_cmd->key, key->key, 16);
687                 memcpy(wl_cmd->key + 16, key->key + 24, 8);
688                 memcpy(wl_cmd->key + 24, key->key + 16, 8);
689
690         } else {
691                 memcpy(wl_cmd->key, key->key, key->keylen);
692         }
693         wl_cmd->key_size = key->keylen;
694
695         wl_cmd->id = key->keyidx;
696         wl_cmd->ssid_profile = 0;
697
698         wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
699
700         ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
701         if (ret < 0) {
702                 wl1251_warning("could not set keys");
703                 goto out_sleep;
704         }
705
706 out_sleep:
707         wl1251_ps_elp_sleep(wl);
708
709 out_unlock:
710         mutex_unlock(&wl->mutex);
711
712 out:
713         kfree(wl_cmd);
714
715         return ret;
716 }
717
718 static int wl1251_build_basic_rates(char *rates)
719 {
720         u8 index = 0;
721
722         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_1MB;
723         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_2MB;
724         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_5MB;
725         rates[index++] = IEEE80211_BASIC_RATE_MASK | IEEE80211_CCK_RATE_11MB;
726
727         return index;
728 }
729
730 static int wl1251_build_extended_rates(char *rates)
731 {
732         u8 index = 0;
733
734         rates[index++] = IEEE80211_OFDM_RATE_6MB;
735         rates[index++] = IEEE80211_OFDM_RATE_9MB;
736         rates[index++] = IEEE80211_OFDM_RATE_12MB;
737         rates[index++] = IEEE80211_OFDM_RATE_18MB;
738         rates[index++] = IEEE80211_OFDM_RATE_24MB;
739         rates[index++] = IEEE80211_OFDM_RATE_36MB;
740         rates[index++] = IEEE80211_OFDM_RATE_48MB;
741         rates[index++] = IEEE80211_OFDM_RATE_54MB;
742
743         return index;
744 }
745
746
747 static int wl1251_build_probe_req(struct wl1251 *wl, u8 *ssid, size_t ssid_len)
748 {
749         struct wl12xx_probe_req_template template;
750         struct wl12xx_ie_rates *rates;
751         char *ptr;
752         u16 size;
753
754         ptr = (char *)&template;
755         size = sizeof(struct ieee80211_header);
756
757         memset(template.header.da, 0xff, ETH_ALEN);
758         memset(template.header.bssid, 0xff, ETH_ALEN);
759         memcpy(template.header.sa, wl->mac_addr, ETH_ALEN);
760         template.header.frame_ctl = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
761
762         /* IEs */
763         /* SSID */
764         template.ssid.header.id = WLAN_EID_SSID;
765         template.ssid.header.len = ssid_len;
766         if (ssid_len && ssid)
767                 memcpy(template.ssid.ssid, ssid, ssid_len);
768         size += sizeof(struct wl12xx_ie_header) + ssid_len;
769         ptr += size;
770
771         /* Basic Rates */
772         rates = (struct wl12xx_ie_rates *)ptr;
773         rates->header.id = WLAN_EID_SUPP_RATES;
774         rates->header.len = wl1251_build_basic_rates(rates->rates);
775         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
776         ptr += sizeof(struct wl12xx_ie_header) + rates->header.len;
777
778         /* Extended rates */
779         rates = (struct wl12xx_ie_rates *)ptr;
780         rates->header.id = WLAN_EID_EXT_SUPP_RATES;
781         rates->header.len = wl1251_build_extended_rates(rates->rates);
782         size += sizeof(struct wl12xx_ie_header) + rates->header.len;
783
784         wl1251_dump(DEBUG_SCAN, "PROBE REQ: ", &template, size);
785
786         return wl1251_cmd_template_set(wl, CMD_PROBE_REQ, &template,
787                                       size);
788 }
789
790 static int wl1251_hw_scan(struct wl1251 *wl, u8 *ssid, size_t len,
791                           u8 active_scan, u8 high_prio, u8 num_channels,
792                           u8 probe_requests)
793 {
794         struct wl1251_cmd_trigger_scan_to *trigger = NULL;
795         struct cmd_scan *params = NULL;
796         int i, ret;
797         u16 scan_options = 0;
798
799         if (wl->scanning)
800                 return -EINVAL;
801
802         params = kzalloc(sizeof(*params), GFP_KERNEL);
803         if (!params)
804                 return -ENOMEM;
805
806         params->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
807         params->params.rx_filter_options =
808                 cpu_to_le32(CFG_RX_PRSP_EN | CFG_RX_MGMT_EN | CFG_RX_BCN_EN);
809
810         /* High priority scan */
811         if (!active_scan)
812                 scan_options |= SCAN_PASSIVE;
813         if (high_prio)
814                 scan_options |= SCAN_PRIORITY_HIGH;
815         params->params.scan_options = scan_options;
816
817         params->params.num_channels = num_channels;
818         params->params.num_probe_requests = probe_requests;
819         params->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
820         params->params.tid_trigger = 0;
821
822         for (i = 0; i < num_channels; i++) {
823                 params->channels[i].min_duration = cpu_to_le32(30000);
824                 params->channels[i].max_duration = cpu_to_le32(60000);
825                 memset(&params->channels[i].bssid_lsb, 0xff, 4);
826                 memset(&params->channels[i].bssid_msb, 0xff, 2);
827                 params->channels[i].early_termination = 0;
828                 params->channels[i].tx_power_att = 0;
829                 params->channels[i].channel = i + 1;
830                 memset(params->channels[i].pad, 0, 3);
831         }
832
833         for (i = num_channels; i < SCAN_MAX_NUM_OF_CHANNELS; i++)
834                 memset(&params->channels[i], 0,
835                        sizeof(struct basic_scan_channel_parameters));
836
837         if (len && ssid) {
838                 params->params.ssid_len = len;
839                 memcpy(params->params.ssid, ssid, len);
840         } else {
841                 params->params.ssid_len = 0;
842                 memset(params->params.ssid, 0, 32);
843         }
844
845         ret = wl1251_build_probe_req(wl, ssid, len);
846         if (ret < 0) {
847                 wl1251_error("PROBE request template failed");
848                 goto out;
849         }
850
851         trigger = kzalloc(sizeof(*trigger), GFP_KERNEL);
852         if (!trigger)
853                 goto out;
854
855         trigger->timeout = 0;
856
857         ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, trigger,
858                               sizeof(*trigger));
859         if (ret < 0) {
860                 wl1251_error("trigger scan to failed for hw scan");
861                 goto out;
862         }
863
864         wl1251_dump(DEBUG_SCAN, "SCAN: ", params, sizeof(*params));
865
866         wl->scanning = true;
867
868         ret = wl1251_cmd_send(wl, CMD_SCAN, params, sizeof(*params));
869         if (ret < 0)
870                 wl1251_error("SCAN failed");
871
872         wl1251_mem_read(wl, wl->cmd_box_addr, params, sizeof(*params));
873
874         if (params->header.status != CMD_STATUS_SUCCESS) {
875                 wl1251_error("TEST command answer error: %d",
876                              params->header.status);
877                 wl->scanning = false;
878                 ret = -EIO;
879                 goto out;
880         }
881
882 out:
883         kfree(params);
884         return ret;
885
886 }
887
888 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
889                              struct cfg80211_scan_request *req)
890 {
891         struct wl1251 *wl = hw->priv;
892         int ret;
893         u8 *ssid = NULL;
894         size_t ssid_len = 0;
895
896         wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
897
898         if (req->n_ssids) {
899                 ssid = req->ssids[0].ssid;
900                 ssid_len = req->ssids[0].ssid_len;
901         }
902
903         mutex_lock(&wl->mutex);
904
905         ret = wl1251_ps_elp_wakeup(wl);
906         if (ret < 0)
907                 goto out;
908
909         ret = wl1251_hw_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
910
911         wl1251_ps_elp_sleep(wl);
912
913 out:
914         mutex_unlock(&wl->mutex);
915
916         return ret;
917 }
918
919 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
920 {
921         struct wl1251 *wl = hw->priv;
922         int ret;
923
924         mutex_lock(&wl->mutex);
925
926         ret = wl1251_ps_elp_wakeup(wl);
927         if (ret < 0)
928                 goto out;
929
930         ret = wl1251_acx_rts_threshold(wl, (u16) value);
931         if (ret < 0)
932                 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
933
934         wl1251_ps_elp_sleep(wl);
935
936 out:
937         mutex_unlock(&wl->mutex);
938
939         return ret;
940 }
941
942 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
943                                        struct ieee80211_vif *vif,
944                                        struct ieee80211_bss_conf *bss_conf,
945                                        u32 changed)
946 {
947         enum wl1251_cmd_ps_mode mode;
948         struct wl1251 *wl = hw->priv;
949         struct sk_buff *beacon;
950         int ret;
951
952         wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
953
954         mutex_lock(&wl->mutex);
955
956         ret = wl1251_ps_elp_wakeup(wl);
957         if (ret < 0)
958                 goto out;
959
960         if (changed & BSS_CHANGED_ASSOC) {
961                 if (bss_conf->assoc) {
962                         wl->aid = bss_conf->aid;
963
964                         ret = wl1251_build_ps_poll(wl, wl->aid);
965                         if (ret < 0)
966                                 goto out_sleep;
967
968                         ret = wl1251_acx_aid(wl, wl->aid);
969                         if (ret < 0)
970                                 goto out_sleep;
971
972                         /* If we want to go in PSM but we're not there yet */
973                         if (wl->psm_requested && !wl->psm) {
974                                 mode = STATION_POWER_SAVE_MODE;
975                                 ret = wl1251_ps_set_mode(wl, mode);
976                                 if (ret < 0)
977                                         goto out_sleep;
978                         }
979                 }
980         }
981         if (changed & BSS_CHANGED_ERP_SLOT) {
982                 if (bss_conf->use_short_slot)
983                         ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
984                 else
985                         ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
986                 if (ret < 0) {
987                         wl1251_warning("Set slot time failed %d", ret);
988                         goto out_sleep;
989                 }
990         }
991
992         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
993                 if (bss_conf->use_short_preamble)
994                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
995                 else
996                         wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
997         }
998
999         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1000                 if (bss_conf->use_cts_prot)
1001                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1002                 else
1003                         ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1004                 if (ret < 0) {
1005                         wl1251_warning("Set ctsprotect failed %d", ret);
1006                         goto out;
1007                 }
1008         }
1009
1010         if (changed & BSS_CHANGED_BSSID) {
1011                 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1012
1013                 ret = wl1251_build_null_data(wl);
1014                 if (ret < 0)
1015                         goto out;
1016
1017                 if (wl->bss_type != BSS_TYPE_IBSS) {
1018                         ret = wl1251_cmd_join(wl, wl->bss_type, 5, 100, 1);
1019                         if (ret < 0)
1020                                 goto out_sleep;
1021                         wl1251_warning("Set ctsprotect failed %d", ret);
1022                         goto out_sleep;
1023                 }
1024         }
1025
1026         if (changed & BSS_CHANGED_BEACON) {
1027                 beacon = ieee80211_beacon_get(hw, vif);
1028                 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1029                                               beacon->len);
1030
1031                 if (ret < 0) {
1032                         dev_kfree_skb(beacon);
1033                         goto out;
1034                 }
1035
1036                 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1037                                               beacon->len);
1038
1039                 dev_kfree_skb(beacon);
1040
1041                 if (ret < 0)
1042                         goto out;
1043
1044                 ret = wl->chip.op_cmd_join(wl, wl->bss_type, 1, 100, 0);
1045
1046                 if (ret < 0)
1047                         goto out;
1048         }
1049
1050 out_sleep:
1051         wl1251_ps_elp_sleep(wl);
1052
1053 out:
1054         mutex_unlock(&wl->mutex);
1055 }
1056
1057
1058 /* can't be const, mac80211 writes to this */
1059 static struct ieee80211_rate wl1251_rates[] = {
1060         { .bitrate = 10,
1061           .hw_value = 0x1,
1062           .hw_value_short = 0x1, },
1063         { .bitrate = 20,
1064           .hw_value = 0x2,
1065           .hw_value_short = 0x2,
1066           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1067         { .bitrate = 55,
1068           .hw_value = 0x4,
1069           .hw_value_short = 0x4,
1070           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1071         { .bitrate = 110,
1072           .hw_value = 0x20,
1073           .hw_value_short = 0x20,
1074           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1075         { .bitrate = 60,
1076           .hw_value = 0x8,
1077           .hw_value_short = 0x8, },
1078         { .bitrate = 90,
1079           .hw_value = 0x10,
1080           .hw_value_short = 0x10, },
1081         { .bitrate = 120,
1082           .hw_value = 0x40,
1083           .hw_value_short = 0x40, },
1084         { .bitrate = 180,
1085           .hw_value = 0x80,
1086           .hw_value_short = 0x80, },
1087         { .bitrate = 240,
1088           .hw_value = 0x200,
1089           .hw_value_short = 0x200, },
1090         { .bitrate = 360,
1091          .hw_value = 0x400,
1092          .hw_value_short = 0x400, },
1093         { .bitrate = 480,
1094           .hw_value = 0x800,
1095           .hw_value_short = 0x800, },
1096         { .bitrate = 540,
1097           .hw_value = 0x1000,
1098           .hw_value_short = 0x1000, },
1099 };
1100
1101 /* can't be const, mac80211 writes to this */
1102 static struct ieee80211_channel wl1251_channels[] = {
1103         { .hw_value = 1, .center_freq = 2412},
1104         { .hw_value = 2, .center_freq = 2417},
1105         { .hw_value = 3, .center_freq = 2422},
1106         { .hw_value = 4, .center_freq = 2427},
1107         { .hw_value = 5, .center_freq = 2432},
1108         { .hw_value = 6, .center_freq = 2437},
1109         { .hw_value = 7, .center_freq = 2442},
1110         { .hw_value = 8, .center_freq = 2447},
1111         { .hw_value = 9, .center_freq = 2452},
1112         { .hw_value = 10, .center_freq = 2457},
1113         { .hw_value = 11, .center_freq = 2462},
1114         { .hw_value = 12, .center_freq = 2467},
1115         { .hw_value = 13, .center_freq = 2472},
1116 };
1117
1118 /* can't be const, mac80211 writes to this */
1119 static struct ieee80211_supported_band wl1251_band_2ghz = {
1120         .channels = wl1251_channels,
1121         .n_channels = ARRAY_SIZE(wl1251_channels),
1122         .bitrates = wl1251_rates,
1123         .n_bitrates = ARRAY_SIZE(wl1251_rates),
1124 };
1125
1126 static const struct ieee80211_ops wl1251_ops = {
1127         .start = wl1251_op_start,
1128         .stop = wl1251_op_stop,
1129         .add_interface = wl1251_op_add_interface,
1130         .remove_interface = wl1251_op_remove_interface,
1131         .config = wl1251_op_config,
1132         .configure_filter = wl1251_op_configure_filter,
1133         .tx = wl1251_op_tx,
1134         .set_key = wl1251_op_set_key,
1135         .hw_scan = wl1251_op_hw_scan,
1136         .bss_info_changed = wl1251_op_bss_info_changed,
1137         .set_rts_threshold = wl1251_op_set_rts_threshold,
1138 };
1139
1140 static int wl1251_register_hw(struct wl1251 *wl)
1141 {
1142         int ret;
1143
1144         if (wl->mac80211_registered)
1145                 return 0;
1146
1147         SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1148
1149         ret = ieee80211_register_hw(wl->hw);
1150         if (ret < 0) {
1151                 wl1251_error("unable to register mac80211 hw: %d", ret);
1152                 return ret;
1153         }
1154
1155         wl->mac80211_registered = true;
1156
1157         wl1251_notice("loaded");
1158
1159         return 0;
1160 }
1161
1162 int wl1251_init_ieee80211(struct wl1251 *wl)
1163 {
1164         int ret;
1165
1166         /* The tx descriptor buffer and the TKIP space */
1167         wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1168                 + WL1251_TKIP_IV_SPACE;
1169
1170         /* unit us */
1171         /* FIXME: find a proper value */
1172         wl->hw->channel_change_time = 10000;
1173
1174         wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1175                 IEEE80211_HW_NOISE_DBM;
1176
1177         wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1178         wl->hw->wiphy->max_scan_ssids = 1;
1179         wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1180
1181         ret = wl1251_register_hw(wl);
1182         if (ret)
1183                 goto out;
1184
1185         wl1251_debugfs_init(wl);
1186         wl1251_notice("initialized");
1187
1188         ret = 0;
1189
1190 out:
1191         return ret;
1192 }
1193 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1194
1195 #define WL1251_DEFAULT_CHANNEL 1
1196 struct ieee80211_hw *wl1251_alloc_hw(void)
1197 {
1198         struct ieee80211_hw *hw;
1199         struct wl1251 *wl;
1200         int i;
1201         static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1202
1203         hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1204         if (!hw) {
1205                 wl1251_error("could not alloc ieee80211_hw");
1206                 return ERR_PTR(-ENOMEM);
1207         }
1208
1209         wl = hw->priv;
1210         memset(wl, 0, sizeof(*wl));
1211
1212         wl->hw = hw;
1213
1214         wl->data_in_count = 0;
1215
1216         skb_queue_head_init(&wl->tx_queue);
1217
1218         INIT_WORK(&wl->filter_work, wl1251_filter_work);
1219         wl->channel = WL1251_DEFAULT_CHANNEL;
1220         wl->scanning = false;
1221         wl->default_key = 0;
1222         wl->listen_int = 1;
1223         wl->rx_counter = 0;
1224         wl->rx_handled = 0;
1225         wl->rx_current_buffer = 0;
1226         wl->rx_last_id = 0;
1227         wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1228         wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1229         wl->elp = false;
1230         wl->psm = 0;
1231         wl->psm_requested = false;
1232         wl->tx_queue_stopped = false;
1233         wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1234
1235         /* We use the default power on sleep time until we know which chip
1236          * we're using */
1237         wl->chip.power_on_sleep = WL1251_DEFAULT_POWER_ON_SLEEP;
1238
1239         for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1240                 wl->tx_frames[i] = NULL;
1241
1242         wl->next_tx_complete = 0;
1243
1244         /*
1245          * In case our MAC address is not correctly set,
1246          * we use a random but Nokia MAC.
1247          */
1248         memcpy(wl->mac_addr, nokia_oui, 3);
1249         get_random_bytes(wl->mac_addr + 3, 3);
1250
1251         wl->state = WL1251_STATE_OFF;
1252         mutex_init(&wl->mutex);
1253
1254         wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1255         wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1256
1257         wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1258         if (!wl->rx_descriptor) {
1259                 wl1251_error("could not allocate memory for rx descriptor");
1260                 ieee80211_free_hw(hw);
1261                 return ERR_PTR(-ENOMEM);
1262         }
1263
1264         return hw;
1265 }
1266 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1267
1268 int wl1251_free_hw(struct wl1251 *wl)
1269 {
1270         ieee80211_unregister_hw(wl->hw);
1271
1272         wl1251_debugfs_exit(wl);
1273
1274         kfree(wl->target_mem_map);
1275         kfree(wl->data_path);
1276         kfree(wl->fw);
1277         wl->fw = NULL;
1278         kfree(wl->nvs);
1279         wl->nvs = NULL;
1280
1281         kfree(wl->rx_descriptor);
1282         wl->rx_descriptor = NULL;
1283
1284         ieee80211_free_hw(wl->hw);
1285
1286         return 0;
1287 }
1288 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1289
1290 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1291 MODULE_LICENSE("GPL");
1292 MODULE_AUTHOR("Kalle Valo <Kalle.Valo@nokia.com>");
1293 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");