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wl1251: add U-APSD support
[linux-2.6.git] / drivers / net / wireless / wl12xx / wl1251_main.c
blob595f0f94d16ea03a6bc7eb8882b5a2429a1fe334
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
33 #include "wl1251.h"
34 #include "wl12xx_80211.h"
35 #include "wl1251_reg.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 #include "wl1251_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 void wl1251_power_off(struct wl1251 *wl)
57 {
58 wl->set_power(false);
59 }
60
61 static void wl1251_power_on(struct wl1251 *wl)
62 {
63 wl->set_power(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 = kmalloc(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 memcpy(wl->nvs, fw->data, wl->nvs_len);
135
136 ret = 0;
137
138 out:
139 release_firmware(fw);
140
141 return ret;
142 }
143
144 static void wl1251_fw_wakeup(struct wl1251 *wl)
145 {
146 u32 elp_reg;
147
148 elp_reg = ELPCTRL_WAKE_UP;
149 wl1251_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
150 elp_reg = wl1251_read32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
151
152 if (!(elp_reg & ELPCTRL_WLAN_READY))
153 wl1251_warning("WLAN not ready");
154 }
155
156 static int wl1251_chip_wakeup(struct wl1251 *wl)
157 {
158 int ret = 0;
159
160 wl1251_power_on(wl);
161 msleep(WL1251_POWER_ON_SLEEP);
162 wl->if_ops->reset(wl);
163
164 /* We don't need a real memory partition here, because we only want
165 * to use the registers at this point. */
166 wl1251_set_partition(wl,
167 0x00000000,
168 0x00000000,
169 REGISTERS_BASE,
170 REGISTERS_DOWN_SIZE);
171
172 /* ELP module wake up */
173 wl1251_fw_wakeup(wl);
174
175 /* whal_FwCtrl_BootSm() */
176
177 /* 0. read chip id from CHIP_ID */
178 wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
179
180 /* 1. check if chip id is valid */
181
182 switch (wl->chip_id) {
183 case CHIP_ID_1251_PG12:
184 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
185 wl->chip_id);
186 break;
187 case CHIP_ID_1251_PG11:
188 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
189 wl->chip_id);
190 break;
191 case CHIP_ID_1251_PG10:
192 default:
193 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
194 ret = -ENODEV;
195 goto out;
196 }
197
198 if (wl->fw == NULL) {
199 ret = wl1251_fetch_firmware(wl);
200 if (ret < 0)
201 goto out;
202 }
203
204 /* No NVS from netlink, try to get it from the filesystem */
205 if (wl->nvs == NULL) {
206 ret = wl1251_fetch_nvs(wl);
207 if (ret < 0)
208 goto out;
209 }
210
211 out:
212 return ret;
213 }
214
215 #define WL1251_IRQ_LOOP_COUNT 10
216 static void wl1251_irq_work(struct work_struct *work)
217 {
218 u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
219 struct wl1251 *wl =
220 container_of(work, struct wl1251, irq_work);
221 int ret;
222
223 mutex_lock(&wl->mutex);
224
225 wl1251_debug(DEBUG_IRQ, "IRQ work");
226
227 if (wl->state == WL1251_STATE_OFF)
228 goto out;
229
230 ret = wl1251_ps_elp_wakeup(wl);
231 if (ret < 0)
232 goto out;
233
234 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
235
236 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
237 wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
238
239 do {
240 if (wl->data_path) {
241 wl->rx_counter = wl1251_mem_read32(
242 wl, wl->data_path->rx_control_addr);
243
244 /* We handle a frmware bug here */
245 switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
246 case 0:
247 wl1251_debug(DEBUG_IRQ,
248 "RX: FW and host in sync");
249 intr &= ~WL1251_ACX_INTR_RX0_DATA;
250 intr &= ~WL1251_ACX_INTR_RX1_DATA;
251 break;
252 case 1:
253 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
254 intr |= WL1251_ACX_INTR_RX0_DATA;
255 intr &= ~WL1251_ACX_INTR_RX1_DATA;
256 break;
257 case 2:
258 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
259 intr |= WL1251_ACX_INTR_RX0_DATA;
260 intr |= WL1251_ACX_INTR_RX1_DATA;
261 break;
262 default:
263 wl1251_warning(
264 "RX: FW and host out of sync: %d",
265 wl->rx_counter - wl->rx_handled);
266 break;
267 }
268
269 wl->rx_handled = wl->rx_counter;
270
271 wl1251_debug(DEBUG_IRQ, "RX counter: %d",
272 wl->rx_counter);
273 }
274
275 intr &= wl->intr_mask;
276
277 if (intr == 0) {
278 wl1251_debug(DEBUG_IRQ, "INTR is 0");
279 goto out_sleep;
280 }
281
282 if (intr & WL1251_ACX_INTR_RX0_DATA) {
283 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
284 wl1251_rx(wl);
285 }
286
287 if (intr & WL1251_ACX_INTR_RX1_DATA) {
288 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
289 wl1251_rx(wl);
290 }
291
292 if (intr & WL1251_ACX_INTR_TX_RESULT) {
293 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
294 wl1251_tx_complete(wl);
295 }
296
297 if (intr & (WL1251_ACX_INTR_EVENT_A |
298 WL1251_ACX_INTR_EVENT_B)) {
299 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT (0x%x)",
300 intr);
301 if (intr & WL1251_ACX_INTR_EVENT_A)
302 wl1251_event_handle(wl, 0);
303 else
304 wl1251_event_handle(wl, 1);
305 }
306
307 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
308 wl1251_debug(DEBUG_IRQ,
309 "WL1251_ACX_INTR_INIT_COMPLETE");
310
311 if (--ctr == 0)
312 break;
313
314 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
315 } while (intr);
316
317 out_sleep:
318 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
319 wl1251_ps_elp_sleep(wl);
320
321 out:
322 mutex_unlock(&wl->mutex);
323 }
324
325 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
326 u16 beacon_interval, u8 dtim_period)
327 {
328 int ret;
329
330 ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
331 DEFAULT_HW_GEN_MODULATION_TYPE,
332 wl->tx_mgmt_frm_rate,
333 wl->tx_mgmt_frm_mod);
334 if (ret < 0)
335 goto out;
336
337
338 ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
339 dtim_period);
340 if (ret < 0)
341 goto out;
342
343 /*
344 * FIXME: we should wait for JOIN_EVENT_COMPLETE_ID but to simplify
345 * locking we just sleep instead, for now
346 */
347 msleep(10);
348
349 out:
350 return ret;
351 }
352
353 static void wl1251_filter_work(struct work_struct *work)
354 {
355 struct wl1251 *wl =
356 container_of(work, struct wl1251, filter_work);
357 int ret;
358
359 mutex_lock(&wl->mutex);
360
361 if (wl->state == WL1251_STATE_OFF)
362 goto out;
363
364 ret = wl1251_ps_elp_wakeup(wl);
365 if (ret < 0)
366 goto out;
367
368 ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
369 wl->dtim_period);
370 if (ret < 0)
371 goto out_sleep;
372
373 out_sleep:
374 wl1251_ps_elp_sleep(wl);
375
376 out:
377 mutex_unlock(&wl->mutex);
378 }
379
380 static int wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
381 {
382 struct wl1251 *wl = hw->priv;
383
384 skb_queue_tail(&wl->tx_queue, skb);
385
386 /*
387 * The chip specific setup must run before the first TX packet -
388 * before that, the tx_work will not be initialized!
389 */
390
391 ieee80211_queue_work(wl->hw, &wl->tx_work);
392
393 /*
394 * The workqueue is slow to process the tx_queue and we need stop
395 * the queue here, otherwise the queue will get too long.
396 */
397 if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_MAX_LENGTH) {
398 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
399 ieee80211_stop_queues(wl->hw);
400
401 /*
402 * FIXME: this is racy, the variable is not properly
403 * protected. Maybe fix this by removing the stupid
404 * variable altogether and checking the real queue state?
405 */
406 wl->tx_queue_stopped = true;
407 }
408
409 return NETDEV_TX_OK;
410 }
411
412 static int wl1251_op_start(struct ieee80211_hw *hw)
413 {
414 struct wl1251 *wl = hw->priv;
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 out:
449 if (ret < 0)
450 wl1251_power_off(wl);
451
452 mutex_unlock(&wl->mutex);
453
454 return ret;
455 }
456
457 static void wl1251_op_stop(struct ieee80211_hw *hw)
458 {
459 struct wl1251 *wl = hw->priv;
460
461 wl1251_info("down");
462
463 wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
464
465 mutex_lock(&wl->mutex);
466
467 WARN_ON(wl->state != WL1251_STATE_ON);
468
469 if (wl->scanning) {
470 mutex_unlock(&wl->mutex);
471 ieee80211_scan_completed(wl->hw, true);
472 mutex_lock(&wl->mutex);
473 wl->scanning = false;
474 }
475
476 wl->state = WL1251_STATE_OFF;
477
478 wl1251_disable_interrupts(wl);
479
480 mutex_unlock(&wl->mutex);
481
482 cancel_work_sync(&wl->irq_work);
483 cancel_work_sync(&wl->tx_work);
484 cancel_work_sync(&wl->filter_work);
485
486 mutex_lock(&wl->mutex);
487
488 /* let's notify MAC80211 about the remaining pending TX frames */
489 wl1251_tx_flush(wl);
490 wl1251_power_off(wl);
491
492 memset(wl->bssid, 0, ETH_ALEN);
493 wl->listen_int = 1;
494 wl->bss_type = MAX_BSS_TYPE;
495
496 wl->data_in_count = 0;
497 wl->rx_counter = 0;
498 wl->rx_handled = 0;
499 wl->rx_current_buffer = 0;
500 wl->rx_last_id = 0;
501 wl->next_tx_complete = 0;
502 wl->elp = false;
503 wl->psm = 0;
504 wl->tx_queue_stopped = false;
505 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
506 wl->channel = WL1251_DEFAULT_CHANNEL;
507
508 wl1251_debugfs_reset(wl);
509
510 mutex_unlock(&wl->mutex);
511 }
512
513 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
514 struct ieee80211_vif *vif)
515 {
516 struct wl1251 *wl = hw->priv;
517 int ret = 0;
518
519 wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
520 vif->type, vif->addr);
521
522 mutex_lock(&wl->mutex);
523 if (wl->vif) {
524 ret = -EBUSY;
525 goto out;
526 }
527
528 wl->vif = vif;
529
530 switch (vif->type) {
531 case NL80211_IFTYPE_STATION:
532 wl->bss_type = BSS_TYPE_STA_BSS;
533 break;
534 case NL80211_IFTYPE_ADHOC:
535 wl->bss_type = BSS_TYPE_IBSS;
536 break;
537 default:
538 ret = -EOPNOTSUPP;
539 goto out;
540 }
541
542 if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
543 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
544 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
545 ret = wl1251_acx_station_id(wl);
546 if (ret < 0)
547 goto out;
548 }
549
550 out:
551 mutex_unlock(&wl->mutex);
552 return ret;
553 }
554
555 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
556 struct ieee80211_vif *vif)
557 {
558 struct wl1251 *wl = hw->priv;
559
560 mutex_lock(&wl->mutex);
561 wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
562 wl->vif = NULL;
563 mutex_unlock(&wl->mutex);
564 }
565
566 static int wl1251_build_qos_null_data(struct wl1251 *wl)
567 {
568 struct ieee80211_qos_hdr template;
569
570 memset(&template, 0, sizeof(template));
571
572 memcpy(template.addr1, wl->bssid, ETH_ALEN);
573 memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
574 memcpy(template.addr3, wl->bssid, ETH_ALEN);
575
576 template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
577 IEEE80211_STYPE_QOS_NULLFUNC |
578 IEEE80211_FCTL_TODS);
579
580 /* FIXME: not sure what priority to use here */
581 template.qos_ctrl = cpu_to_le16(0);
582
583 return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
584 sizeof(template));
585 }
586
587 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
588 {
589 struct wl1251 *wl = hw->priv;
590 struct ieee80211_conf *conf = &hw->conf;
591 int channel, ret = 0;
592
593 channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
594
595 wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
596 channel,
597 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
598 conf->power_level);
599
600 mutex_lock(&wl->mutex);
601
602 ret = wl1251_ps_elp_wakeup(wl);
603 if (ret < 0)
604 goto out;
605
606 if (channel != wl->channel) {
607 wl->channel = channel;
608
609 ret = wl1251_join(wl, wl->bss_type, wl->channel,
610 wl->beacon_int, wl->dtim_period);
611 if (ret < 0)
612 goto out_sleep;
613 }
614
615 if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
616 wl1251_debug(DEBUG_PSM, "psm enabled");
617
618 wl->psm_requested = true;
619
620 /*
621 * We enter PSM only if we're already associated.
622 * If we're not, we'll enter it when joining an SSID,
623 * through the bss_info_changed() hook.
624 */
625 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
626 if (ret < 0)
627 goto out_sleep;
628 } else if (!(conf->flags & IEEE80211_CONF_PS) &&
629 wl->psm_requested) {
630 wl1251_debug(DEBUG_PSM, "psm disabled");
631
632 wl->psm_requested = false;
633
634 if (wl->psm) {
635 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
636 if (ret < 0)
637 goto out_sleep;
638 }
639 }
640
641 if (conf->power_level != wl->power_level) {
642 ret = wl1251_acx_tx_power(wl, conf->power_level);
643 if (ret < 0)
644 goto out_sleep;
645
646 wl->power_level = conf->power_level;
647 }
648
649 out_sleep:
650 wl1251_ps_elp_sleep(wl);
651
652 out:
653 mutex_unlock(&wl->mutex);
654
655 return ret;
656 }
657
658 #define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
659 FIF_ALLMULTI | \
660 FIF_FCSFAIL | \
661 FIF_BCN_PRBRESP_PROMISC | \
662 FIF_CONTROL | \
663 FIF_OTHER_BSS)
664
665 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
666 unsigned int changed,
667 unsigned int *total,u64 multicast)
668 {
669 struct wl1251 *wl = hw->priv;
670
671 wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
672
673 *total &= WL1251_SUPPORTED_FILTERS;
674 changed &= WL1251_SUPPORTED_FILTERS;
675
676 if (changed == 0)
677 /* no filters which we support changed */
678 return;
679
680 /* FIXME: wl->rx_config and wl->rx_filter are not protected */
681
682 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
683 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
684
685 if (*total & FIF_PROMISC_IN_BSS) {
686 wl->rx_config |= CFG_BSSID_FILTER_EN;
687 wl->rx_config |= CFG_RX_ALL_GOOD;
688 }
689 if (*total & FIF_ALLMULTI)
690 /*
691 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
692 * all multicast frames
693 */
694 wl->rx_config &= ~CFG_MC_FILTER_EN;
695 if (*total & FIF_FCSFAIL)
696 wl->rx_filter |= CFG_RX_FCS_ERROR;
697 if (*total & FIF_BCN_PRBRESP_PROMISC) {
698 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
699 wl->rx_config &= ~CFG_SSID_FILTER_EN;
700 }
701 if (*total & FIF_CONTROL)
702 wl->rx_filter |= CFG_RX_CTL_EN;
703 if (*total & FIF_OTHER_BSS)
704 wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
705
706 /*
707 * FIXME: workqueues need to be properly cancelled on stop(), for
708 * now let's just disable changing the filter settings. They will
709 * be updated any on config().
710 */
711 /* schedule_work(&wl->filter_work); */
712 }
713
714 /* HW encryption */
715 static int wl1251_set_key_type(struct wl1251 *wl,
716 struct wl1251_cmd_set_keys *key,
717 enum set_key_cmd cmd,
718 struct ieee80211_key_conf *mac80211_key,
719 const u8 *addr)
720 {
721 switch (mac80211_key->alg) {
722 case ALG_WEP:
723 if (is_broadcast_ether_addr(addr))
724 key->key_type = KEY_WEP_DEFAULT;
725 else
726 key->key_type = KEY_WEP_ADDR;
727
728 mac80211_key->hw_key_idx = mac80211_key->keyidx;
729 break;
730 case ALG_TKIP:
731 if (is_broadcast_ether_addr(addr))
732 key->key_type = KEY_TKIP_MIC_GROUP;
733 else
734 key->key_type = KEY_TKIP_MIC_PAIRWISE;
735
736 mac80211_key->hw_key_idx = mac80211_key->keyidx;
737 break;
738 case ALG_CCMP:
739 if (is_broadcast_ether_addr(addr))
740 key->key_type = KEY_AES_GROUP;
741 else
742 key->key_type = KEY_AES_PAIRWISE;
743 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
744 break;
745 default:
746 wl1251_error("Unknown key algo 0x%x", mac80211_key->alg);
747 return -EOPNOTSUPP;
748 }
749
750 return 0;
751 }
752
753 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
754 struct ieee80211_vif *vif,
755 struct ieee80211_sta *sta,
756 struct ieee80211_key_conf *key)
757 {
758 struct wl1251 *wl = hw->priv;
759 struct wl1251_cmd_set_keys *wl_cmd;
760 const u8 *addr;
761 int ret;
762
763 static const u8 bcast_addr[ETH_ALEN] =
764 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
765
766 wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
767
768 wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
769 if (!wl_cmd) {
770 ret = -ENOMEM;
771 goto out;
772 }
773
774 addr = sta ? sta->addr : bcast_addr;
775
776 wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
777 wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
778 wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
779 key->alg, key->keyidx, key->keylen, key->flags);
780 wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
781
782 if (is_zero_ether_addr(addr)) {
783 /* We dont support TX only encryption */
784 ret = -EOPNOTSUPP;
785 goto out;
786 }
787
788 mutex_lock(&wl->mutex);
789
790 ret = wl1251_ps_elp_wakeup(wl);
791 if (ret < 0)
792 goto out_unlock;
793
794 switch (cmd) {
795 case SET_KEY:
796 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
797 break;
798 case DISABLE_KEY:
799 wl_cmd->key_action = KEY_REMOVE;
800 break;
801 default:
802 wl1251_error("Unsupported key cmd 0x%x", cmd);
803 break;
804 }
805
806 ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
807 if (ret < 0) {
808 wl1251_error("Set KEY type failed");
809 goto out_sleep;
810 }
811
812 if (wl_cmd->key_type != KEY_WEP_DEFAULT)
813 memcpy(wl_cmd->addr, addr, ETH_ALEN);
814
815 if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
816 (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
817 /*
818 * We get the key in the following form:
819 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
820 * but the target is expecting:
821 * TKIP - RX MIC - TX MIC
822 */
823 memcpy(wl_cmd->key, key->key, 16);
824 memcpy(wl_cmd->key + 16, key->key + 24, 8);
825 memcpy(wl_cmd->key + 24, key->key + 16, 8);
826
827 } else {
828 memcpy(wl_cmd->key, key->key, key->keylen);
829 }
830 wl_cmd->key_size = key->keylen;
831
832 wl_cmd->id = key->keyidx;
833 wl_cmd->ssid_profile = 0;
834
835 wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
836
837 ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
838 if (ret < 0) {
839 wl1251_warning("could not set keys");
840 goto out_sleep;
841 }
842
843 out_sleep:
844 wl1251_ps_elp_sleep(wl);
845
846 out_unlock:
847 mutex_unlock(&wl->mutex);
848
849 out:
850 kfree(wl_cmd);
851
852 return ret;
853 }
854
855 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
856 struct cfg80211_scan_request *req)
857 {
858 struct wl1251 *wl = hw->priv;
859 struct sk_buff *skb;
860 size_t ssid_len = 0;
861 u8 *ssid = NULL;
862 int ret;
863
864 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
865
866 if (req->n_ssids) {
867 ssid = req->ssids[0].ssid;
868 ssid_len = req->ssids[0].ssid_len;
869 }
870
871 mutex_lock(&wl->mutex);
872
873 if (wl->scanning) {
874 wl1251_debug(DEBUG_SCAN, "scan already in progress");
875 ret = -EINVAL;
876 goto out;
877 }
878
879 ret = wl1251_ps_elp_wakeup(wl);
880 if (ret < 0)
881 goto out;
882
883 skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
884 req->ie, req->ie_len);
885 if (!skb) {
886 ret = -ENOMEM;
887 goto out;
888 }
889
890 ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
891 skb->len);
892 dev_kfree_skb(skb);
893 if (ret < 0)
894 goto out_sleep;
895
896 ret = wl1251_cmd_trigger_scan_to(wl, 0);
897 if (ret < 0)
898 goto out_sleep;
899
900 wl->scanning = true;
901
902 ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
903 req->n_channels, WL1251_SCAN_NUM_PROBES);
904 if (ret < 0) {
905 wl->scanning = false;
906 goto out_sleep;
907 }
908
909 out_sleep:
910 wl1251_ps_elp_sleep(wl);
911
912 out:
913 mutex_unlock(&wl->mutex);
914
915 return ret;
916 }
917
918 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
919 {
920 struct wl1251 *wl = hw->priv;
921 int ret;
922
923 mutex_lock(&wl->mutex);
924
925 ret = wl1251_ps_elp_wakeup(wl);
926 if (ret < 0)
927 goto out;
928
929 ret = wl1251_acx_rts_threshold(wl, (u16) value);
930 if (ret < 0)
931 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
932
933 wl1251_ps_elp_sleep(wl);
934
935 out:
936 mutex_unlock(&wl->mutex);
937
938 return ret;
939 }
940
941 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
942 struct ieee80211_vif *vif,
943 struct ieee80211_bss_conf *bss_conf,
944 u32 changed)
945 {
946 enum wl1251_cmd_ps_mode mode;
947 struct wl1251 *wl = hw->priv;
948 struct sk_buff *beacon, *skb;
949 int ret;
950
951 wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
952
953 mutex_lock(&wl->mutex);
954
955 ret = wl1251_ps_elp_wakeup(wl);
956 if (ret < 0)
957 goto out;
958
959 if (changed & BSS_CHANGED_BSSID) {
960 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
961
962 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
963 if (!skb)
964 goto out_sleep;
965
966 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
967 skb->data, skb->len);
968 dev_kfree_skb(skb);
969 if (ret < 0)
970 goto out_sleep;
971
972 ret = wl1251_build_qos_null_data(wl);
973 if (ret < 0)
974 goto out;
975
976 if (wl->bss_type != BSS_TYPE_IBSS) {
977 ret = wl1251_join(wl, wl->bss_type, wl->channel,
978 wl->beacon_int, wl->dtim_period);
979 if (ret < 0)
980 goto out_sleep;
981 }
982 }
983
984 if (changed & BSS_CHANGED_ASSOC) {
985 if (bss_conf->assoc) {
986 wl->beacon_int = bss_conf->beacon_int;
987 wl->dtim_period = bss_conf->dtim_period;
988
989 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
990 wl->dtim_period);
991 wl->aid = bss_conf->aid;
992
993 skb = ieee80211_pspoll_get(wl->hw, wl->vif);
994 if (!skb)
995 goto out_sleep;
996
997 ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
998 skb->data,
999 skb->len);
1000 dev_kfree_skb(skb);
1001 if (ret < 0)
1002 goto out_sleep;
1003
1004 ret = wl1251_acx_aid(wl, wl->aid);
1005 if (ret < 0)
1006 goto out_sleep;
1007
1008 /* If we want to go in PSM but we're not there yet */
1009 if (wl->psm_requested && !wl->psm) {
1010 mode = STATION_POWER_SAVE_MODE;
1011 ret = wl1251_ps_set_mode(wl, mode);
1012 if (ret < 0)
1013 goto out_sleep;
1014 }
1015 } else {
1016 /* use defaults when not associated */
1017 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1018 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1019 }
1020 }
1021 if (changed & BSS_CHANGED_ERP_SLOT) {
1022 if (bss_conf->use_short_slot)
1023 ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1024 else
1025 ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1026 if (ret < 0) {
1027 wl1251_warning("Set slot time failed %d", ret);
1028 goto out_sleep;
1029 }
1030 }
1031
1032 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1033 if (bss_conf->use_short_preamble)
1034 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1035 else
1036 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1037 }
1038
1039 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1040 if (bss_conf->use_cts_prot)
1041 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1042 else
1043 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1044 if (ret < 0) {
1045 wl1251_warning("Set ctsprotect failed %d", ret);
1046 goto out_sleep;
1047 }
1048 }
1049
1050 if (changed & BSS_CHANGED_BEACON) {
1051 beacon = ieee80211_beacon_get(hw, vif);
1052 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1053 beacon->len);
1054
1055 if (ret < 0) {
1056 dev_kfree_skb(beacon);
1057 goto out_sleep;
1058 }
1059
1060 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1061 beacon->len);
1062
1063 dev_kfree_skb(beacon);
1064
1065 if (ret < 0)
1066 goto out_sleep;
1067
1068 ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
1069 wl->channel, wl->dtim_period);
1070
1071 if (ret < 0)
1072 goto out_sleep;
1073 }
1074
1075 out_sleep:
1076 wl1251_ps_elp_sleep(wl);
1077
1078 out:
1079 mutex_unlock(&wl->mutex);
1080 }
1081
1082
1083 /* can't be const, mac80211 writes to this */
1084 static struct ieee80211_rate wl1251_rates[] = {
1085 { .bitrate = 10,
1086 .hw_value = 0x1,
1087 .hw_value_short = 0x1, },
1088 { .bitrate = 20,
1089 .hw_value = 0x2,
1090 .hw_value_short = 0x2,
1091 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1092 { .bitrate = 55,
1093 .hw_value = 0x4,
1094 .hw_value_short = 0x4,
1095 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1096 { .bitrate = 110,
1097 .hw_value = 0x20,
1098 .hw_value_short = 0x20,
1099 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1100 { .bitrate = 60,
1101 .hw_value = 0x8,
1102 .hw_value_short = 0x8, },
1103 { .bitrate = 90,
1104 .hw_value = 0x10,
1105 .hw_value_short = 0x10, },
1106 { .bitrate = 120,
1107 .hw_value = 0x40,
1108 .hw_value_short = 0x40, },
1109 { .bitrate = 180,
1110 .hw_value = 0x80,
1111 .hw_value_short = 0x80, },
1112 { .bitrate = 240,
1113 .hw_value = 0x200,
1114 .hw_value_short = 0x200, },
1115 { .bitrate = 360,
1116 .hw_value = 0x400,
1117 .hw_value_short = 0x400, },
1118 { .bitrate = 480,
1119 .hw_value = 0x800,
1120 .hw_value_short = 0x800, },
1121 { .bitrate = 540,
1122 .hw_value = 0x1000,
1123 .hw_value_short = 0x1000, },
1124 };
1125
1126 /* can't be const, mac80211 writes to this */
1127 static struct ieee80211_channel wl1251_channels[] = {
1128 { .hw_value = 1, .center_freq = 2412},
1129 { .hw_value = 2, .center_freq = 2417},
1130 { .hw_value = 3, .center_freq = 2422},
1131 { .hw_value = 4, .center_freq = 2427},
1132 { .hw_value = 5, .center_freq = 2432},
1133 { .hw_value = 6, .center_freq = 2437},
1134 { .hw_value = 7, .center_freq = 2442},
1135 { .hw_value = 8, .center_freq = 2447},
1136 { .hw_value = 9, .center_freq = 2452},
1137 { .hw_value = 10, .center_freq = 2457},
1138 { .hw_value = 11, .center_freq = 2462},
1139 { .hw_value = 12, .center_freq = 2467},
1140 { .hw_value = 13, .center_freq = 2472},
1141 };
1142
1143 static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1144 const struct ieee80211_tx_queue_params *params)
1145 {
1146 enum wl1251_acx_ps_scheme ps_scheme;
1147 struct wl1251 *wl = hw->priv;
1148 int ret;
1149
1150 mutex_lock(&wl->mutex);
1151
1152 wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1153
1154 ret = wl1251_ps_elp_wakeup(wl);
1155 if (ret < 0)
1156 goto out;
1157
1158 ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1159 params->cw_min, params->cw_max,
1160 params->aifs, params->txop);
1161 if (ret < 0)
1162 goto out_sleep;
1163
1164 if (params->uapsd)
1165 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1166 else
1167 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1168
1169 ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1170 CHANNEL_TYPE_EDCF,
1171 wl1251_tx_get_queue(queue), ps_scheme,
1172 WL1251_ACX_ACK_POLICY_LEGACY);
1173 if (ret < 0)
1174 goto out_sleep;
1175
1176 out_sleep:
1177 wl1251_ps_elp_sleep(wl);
1178
1179 out:
1180 mutex_unlock(&wl->mutex);
1181
1182 return ret;
1183 }
1184
1185 /* can't be const, mac80211 writes to this */
1186 static struct ieee80211_supported_band wl1251_band_2ghz = {
1187 .channels = wl1251_channels,
1188 .n_channels = ARRAY_SIZE(wl1251_channels),
1189 .bitrates = wl1251_rates,
1190 .n_bitrates = ARRAY_SIZE(wl1251_rates),
1191 };
1192
1193 static const struct ieee80211_ops wl1251_ops = {
1194 .start = wl1251_op_start,
1195 .stop = wl1251_op_stop,
1196 .add_interface = wl1251_op_add_interface,
1197 .remove_interface = wl1251_op_remove_interface,
1198 .config = wl1251_op_config,
1199 .configure_filter = wl1251_op_configure_filter,
1200 .tx = wl1251_op_tx,
1201 .set_key = wl1251_op_set_key,
1202 .hw_scan = wl1251_op_hw_scan,
1203 .bss_info_changed = wl1251_op_bss_info_changed,
1204 .set_rts_threshold = wl1251_op_set_rts_threshold,
1205 .conf_tx = wl1251_op_conf_tx,
1206 };
1207
1208 static int wl1251_register_hw(struct wl1251 *wl)
1209 {
1210 int ret;
1211
1212 if (wl->mac80211_registered)
1213 return 0;
1214
1215 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1216
1217 ret = ieee80211_register_hw(wl->hw);
1218 if (ret < 0) {
1219 wl1251_error("unable to register mac80211 hw: %d", ret);
1220 return ret;
1221 }
1222
1223 wl->mac80211_registered = true;
1224
1225 wl1251_notice("loaded");
1226
1227 return 0;
1228 }
1229
1230 int wl1251_init_ieee80211(struct wl1251 *wl)
1231 {
1232 int ret;
1233
1234 /* The tx descriptor buffer and the TKIP space */
1235 wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1236 + WL1251_TKIP_IV_SPACE;
1237
1238 /* unit us */
1239 /* FIXME: find a proper value */
1240 wl->hw->channel_change_time = 10000;
1241
1242 wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
1243 IEEE80211_HW_NOISE_DBM |
1244 IEEE80211_HW_SUPPORTS_PS |
1245 IEEE80211_HW_BEACON_FILTER |
1246 IEEE80211_HW_SUPPORTS_UAPSD;
1247
1248 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1249 wl->hw->wiphy->max_scan_ssids = 1;
1250 wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
1251
1252 wl->hw->queues = 4;
1253
1254 ret = wl1251_register_hw(wl);
1255 if (ret)
1256 goto out;
1257
1258 wl1251_debugfs_init(wl);
1259 wl1251_notice("initialized");
1260
1261 ret = 0;
1262
1263 out:
1264 return ret;
1265 }
1266 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1267
1268 struct ieee80211_hw *wl1251_alloc_hw(void)
1269 {
1270 struct ieee80211_hw *hw;
1271 struct wl1251 *wl;
1272 int i;
1273 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1274
1275 hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1276 if (!hw) {
1277 wl1251_error("could not alloc ieee80211_hw");
1278 return ERR_PTR(-ENOMEM);
1279 }
1280
1281 wl = hw->priv;
1282 memset(wl, 0, sizeof(*wl));
1283
1284 wl->hw = hw;
1285
1286 wl->data_in_count = 0;
1287
1288 skb_queue_head_init(&wl->tx_queue);
1289
1290 INIT_WORK(&wl->filter_work, wl1251_filter_work);
1291 INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1292 wl->channel = WL1251_DEFAULT_CHANNEL;
1293 wl->scanning = false;
1294 wl->default_key = 0;
1295 wl->listen_int = 1;
1296 wl->rx_counter = 0;
1297 wl->rx_handled = 0;
1298 wl->rx_current_buffer = 0;
1299 wl->rx_last_id = 0;
1300 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1301 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1302 wl->elp = false;
1303 wl->psm = 0;
1304 wl->psm_requested = false;
1305 wl->tx_queue_stopped = false;
1306 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1307 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1308 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1309 wl->vif = NULL;
1310
1311 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1312 wl->tx_frames[i] = NULL;
1313
1314 wl->next_tx_complete = 0;
1315
1316 INIT_WORK(&wl->irq_work, wl1251_irq_work);
1317 INIT_WORK(&wl->tx_work, wl1251_tx_work);
1318
1319 /*
1320 * In case our MAC address is not correctly set,
1321 * we use a random but Nokia MAC.
1322 */
1323 memcpy(wl->mac_addr, nokia_oui, 3);
1324 get_random_bytes(wl->mac_addr + 3, 3);
1325
1326 wl->state = WL1251_STATE_OFF;
1327 mutex_init(&wl->mutex);
1328
1329 wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1330 wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1331
1332 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1333 if (!wl->rx_descriptor) {
1334 wl1251_error("could not allocate memory for rx descriptor");
1335 ieee80211_free_hw(hw);
1336 return ERR_PTR(-ENOMEM);
1337 }
1338
1339 return hw;
1340 }
1341 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1342
1343 int wl1251_free_hw(struct wl1251 *wl)
1344 {
1345 ieee80211_unregister_hw(wl->hw);
1346
1347 wl1251_debugfs_exit(wl);
1348
1349 kfree(wl->target_mem_map);
1350 kfree(wl->data_path);
1351 vfree(wl->fw);
1352 wl->fw = NULL;
1353 kfree(wl->nvs);
1354 wl->nvs = NULL;
1355
1356 kfree(wl->rx_descriptor);
1357 wl->rx_descriptor = NULL;
1358
1359 ieee80211_free_hw(wl->hw);
1360
1361 return 0;
1362 }
1363 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1364
1365 MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
1366 MODULE_LICENSE("GPL");
1367 MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>");
1368 MODULE_ALIAS("spi:wl1251");
1369 MODULE_FIRMWARE(WL1251_FW_NAME);
Linus' kernel tree