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[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / ti / wl1251 / main.c
1 /*
2 * This file is part of wl1251
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 *
20 */
21
22 #include <linux/module.h>
23 #include <linux/interrupt.h>
24 #include <linux/firmware.h>
25 #include <linux/delay.h>
26 #include <linux/irq.h>
27 #include <linux/crc32.h>
28 #include <linux/etherdevice.h>
29 #include <linux/vmalloc.h>
30 #include <linux/slab.h>
31 #include <linux/netdevice.h>
32
33 #include "wl1251.h"
34 #include "wl12xx_80211.h"
35 #include "reg.h"
36 #include "io.h"
37 #include "cmd.h"
38 #include "event.h"
39 #include "tx.h"
40 #include "rx.h"
41 #include "ps.h"
42 #include "init.h"
43 #include "debugfs.h"
44 #include "boot.h"
45
46 void wl1251_enable_interrupts(struct wl1251 *wl)
47 {
48 wl->if_ops->enable_irq(wl);
49 }
50
51 void wl1251_disable_interrupts(struct wl1251 *wl)
52 {
53 wl->if_ops->disable_irq(wl);
54 }
55
56 static int wl1251_power_off(struct wl1251 *wl)
57 {
58 return wl->if_ops->power(wl, false);
59 }
60
61 static int wl1251_power_on(struct wl1251 *wl)
62 {
63 return wl->if_ops->power(wl, true);
64 }
65
66 static int wl1251_fetch_firmware(struct wl1251 *wl)
67 {
68 const struct firmware *fw;
69 struct device *dev = wiphy_dev(wl->hw->wiphy);
70 int ret;
71
72 ret = request_firmware(&fw, WL1251_FW_NAME, dev);
73
74 if (ret < 0) {
75 wl1251_error("could not get firmware: %d", ret);
76 return ret;
77 }
78
79 if (fw->size % 4) {
80 wl1251_error("firmware size is not multiple of 32 bits: %zu",
81 fw->size);
82 ret = -EILSEQ;
83 goto out;
84 }
85
86 wl->fw_len = fw->size;
87 wl->fw = vmalloc(wl->fw_len);
88
89 if (!wl->fw) {
90 wl1251_error("could not allocate memory for the firmware");
91 ret = -ENOMEM;
92 goto out;
93 }
94
95 memcpy(wl->fw, fw->data, wl->fw_len);
96
97 ret = 0;
98
99 out:
100 release_firmware(fw);
101
102 return ret;
103 }
104
105 static int wl1251_fetch_nvs(struct wl1251 *wl)
106 {
107 const struct firmware *fw;
108 struct device *dev = wiphy_dev(wl->hw->wiphy);
109 int ret;
110
111 ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
112
113 if (ret < 0) {
114 wl1251_error("could not get nvs file: %d", ret);
115 return ret;
116 }
117
118 if (fw->size % 4) {
119 wl1251_error("nvs size is not multiple of 32 bits: %zu",
120 fw->size);
121 ret = -EILSEQ;
122 goto out;
123 }
124
125 wl->nvs_len = fw->size;
126 wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
127
128 if (!wl->nvs) {
129 wl1251_error("could not allocate memory for the nvs file");
130 ret = -ENOMEM;
131 goto out;
132 }
133
134 ret = 0;
135
136 out:
137 release_firmware(fw);
138
139 return ret;
140 }
141
142 static void wl1251_fw_wakeup(struct wl1251 *wl)
143 {
144 u32 elp_reg;
145
146 elp_reg = ELPCTRL_WAKE_UP;
147 wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
148 elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
149
150 if (!(elp_reg & ELPCTRL_WLAN_READY))
151 wl1251_warning("WLAN not ready");
152 }
153
154 static int wl1251_chip_wakeup(struct wl1251 *wl)
155 {
156 int ret;
157
158 ret = wl1251_power_on(wl);
159 if (ret < 0)
160 return ret;
161
162 msleep(WL1251_POWER_ON_SLEEP);
163 wl->if_ops->reset(wl);
164
165 /* We don't need a real memory partition here, because we only want
166 * to use the registers at this point. */
167 wl1251_set_partition(wl,
168 0x00000000,
169 0x00000000,
170 REGISTERS_BASE,
171 REGISTERS_DOWN_SIZE);
172
173 /* ELP module wake up */
174 wl1251_fw_wakeup(wl);
175
176 /* whal_FwCtrl_BootSm() */
177
178 /* 0. read chip id from CHIP_ID */
179 wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
180
181 /* 1. check if chip id is valid */
182
183 switch (wl->chip_id) {
184 case CHIP_ID_1251_PG12:
185 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
186 wl->chip_id);
187 break;
188 case CHIP_ID_1251_PG11:
189 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
190 wl->chip_id);
191 break;
192 case CHIP_ID_1251_PG10:
193 default:
194 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
195 ret = -ENODEV;
196 goto out;
197 }
198
199 if (wl->fw == NULL) {
200 ret = wl1251_fetch_firmware(wl);
201 if (ret < 0)
202 goto out;
203 }
204
205 if (wl->nvs == NULL && !wl->use_eeprom) {
206 /* No NVS from netlink, try to get it from the filesystem */
207 ret = wl1251_fetch_nvs(wl);
208 if (ret < 0)
209 goto out;
210 }
211
212 out:
213 return ret;
214 }
215
216 #define WL1251_IRQ_LOOP_COUNT 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_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
300 wl1251_event_handle(wl, 0);
301 }
302
303 if (intr & WL1251_ACX_INTR_EVENT_B) {
304 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
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 * Join command applies filters, and if we are not associated,
340 * BSSID filter must be disabled for association to work.
341 */
342 if (is_zero_ether_addr(wl->bssid))
343 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
344
345 ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
346 dtim_period);
347 if (ret < 0)
348 goto out;
349
350 ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
351 if (ret < 0)
352 wl1251_warning("join timeout");
353
354 out:
355 return ret;
356 }
357
358 static void wl1251_op_tx(struct ieee80211_hw *hw,
359 struct ieee80211_tx_control *control,
360 struct sk_buff *skb)
361 {
362 struct wl1251 *wl = hw->priv;
363 unsigned long flags;
364
365 skb_queue_tail(&wl->tx_queue, skb);
366
367 /*
368 * The chip specific setup must run before the first TX packet -
369 * before that, the tx_work will not be initialized!
370 */
371
372 ieee80211_queue_work(wl->hw, &wl->tx_work);
373
374 /*
375 * The workqueue is slow to process the tx_queue and we need stop
376 * the queue here, otherwise the queue will get too long.
377 */
378 if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
379 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
380
381 spin_lock_irqsave(&wl->wl_lock, flags);
382 ieee80211_stop_queues(wl->hw);
383 wl->tx_queue_stopped = true;
384 spin_unlock_irqrestore(&wl->wl_lock, flags);
385 }
386 }
387
388 static int wl1251_op_start(struct ieee80211_hw *hw)
389 {
390 struct wl1251 *wl = hw->priv;
391 struct wiphy *wiphy = hw->wiphy;
392 int ret = 0;
393
394 wl1251_debug(DEBUG_MAC80211, "mac80211 start");
395
396 mutex_lock(&wl->mutex);
397
398 if (wl->state != WL1251_STATE_OFF) {
399 wl1251_error("cannot start because not in off state: %d",
400 wl->state);
401 ret = -EBUSY;
402 goto out;
403 }
404
405 ret = wl1251_chip_wakeup(wl);
406 if (ret < 0)
407 goto out;
408
409 ret = wl1251_boot(wl);
410 if (ret < 0)
411 goto out;
412
413 ret = wl1251_hw_init(wl);
414 if (ret < 0)
415 goto out;
416
417 ret = wl1251_acx_station_id(wl);
418 if (ret < 0)
419 goto out;
420
421 wl->state = WL1251_STATE_ON;
422
423 wl1251_info("firmware booted (%s)", wl->fw_ver);
424
425 /* update hw/fw version info in wiphy struct */
426 wiphy->hw_version = wl->chip_id;
427 strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
428
429 out:
430 if (ret < 0)
431 wl1251_power_off(wl);
432
433 mutex_unlock(&wl->mutex);
434
435 return ret;
436 }
437
438 static void wl1251_op_stop(struct ieee80211_hw *hw)
439 {
440 struct wl1251 *wl = hw->priv;
441
442 wl1251_info("down");
443
444 wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
445
446 mutex_lock(&wl->mutex);
447
448 WARN_ON(wl->state != WL1251_STATE_ON);
449
450 if (wl->scanning) {
451 struct cfg80211_scan_info info = {
452 .aborted = true,
453 };
454
455 ieee80211_scan_completed(wl->hw, &info);
456 wl->scanning = false;
457 }
458
459 wl->state = WL1251_STATE_OFF;
460
461 wl1251_disable_interrupts(wl);
462
463 mutex_unlock(&wl->mutex);
464
465 cancel_work_sync(&wl->irq_work);
466 cancel_work_sync(&wl->tx_work);
467 cancel_delayed_work_sync(&wl->elp_work);
468
469 mutex_lock(&wl->mutex);
470
471 /* let's notify MAC80211 about the remaining pending TX frames */
472 wl1251_tx_flush(wl);
473 wl1251_power_off(wl);
474
475 eth_zero_addr(wl->bssid);
476 wl->listen_int = 1;
477 wl->bss_type = MAX_BSS_TYPE;
478
479 wl->data_in_count = 0;
480 wl->rx_counter = 0;
481 wl->rx_handled = 0;
482 wl->rx_current_buffer = 0;
483 wl->rx_last_id = 0;
484 wl->next_tx_complete = 0;
485 wl->elp = false;
486 wl->station_mode = STATION_ACTIVE_MODE;
487 wl->psm_entry_retry = 0;
488 wl->tx_queue_stopped = false;
489 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
490 wl->rssi_thold = 0;
491 wl->channel = WL1251_DEFAULT_CHANNEL;
492 wl->monitor_present = false;
493 wl->joined = false;
494
495 wl1251_debugfs_reset(wl);
496
497 mutex_unlock(&wl->mutex);
498 }
499
500 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
501 struct ieee80211_vif *vif)
502 {
503 struct wl1251 *wl = hw->priv;
504 int ret = 0;
505
506 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
507 IEEE80211_VIF_SUPPORTS_UAPSD |
508 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
509
510 wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
511 vif->type, vif->addr);
512
513 mutex_lock(&wl->mutex);
514 if (wl->vif) {
515 ret = -EBUSY;
516 goto out;
517 }
518
519 wl->vif = vif;
520
521 switch (vif->type) {
522 case NL80211_IFTYPE_STATION:
523 wl->bss_type = BSS_TYPE_STA_BSS;
524 break;
525 case NL80211_IFTYPE_ADHOC:
526 wl->bss_type = BSS_TYPE_IBSS;
527 break;
528 default:
529 ret = -EOPNOTSUPP;
530 goto out;
531 }
532
533 if (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
534 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
535 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
536 ret = wl1251_acx_station_id(wl);
537 if (ret < 0)
538 goto out;
539 }
540
541 out:
542 mutex_unlock(&wl->mutex);
543 return ret;
544 }
545
546 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
547 struct ieee80211_vif *vif)
548 {
549 struct wl1251 *wl = hw->priv;
550
551 mutex_lock(&wl->mutex);
552 wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
553 wl->vif = NULL;
554 eth_zero_addr(wl->bssid);
555 mutex_unlock(&wl->mutex);
556 }
557
558 static int wl1251_build_null_data(struct wl1251 *wl)
559 {
560 struct sk_buff *skb = NULL;
561 int size;
562 void *ptr;
563 int ret = -ENOMEM;
564
565 if (wl->bss_type == BSS_TYPE_IBSS) {
566 size = sizeof(struct wl12xx_null_data_template);
567 ptr = NULL;
568 } else {
569 skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
570 if (!skb)
571 goto out;
572 size = skb->len;
573 ptr = skb->data;
574 }
575
576 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
577
578 out:
579 dev_kfree_skb(skb);
580 if (ret)
581 wl1251_warning("cmd buld null data failed: %d", ret);
582
583 return ret;
584 }
585
586 static int wl1251_build_qos_null_data(struct wl1251 *wl)
587 {
588 struct ieee80211_qos_hdr template;
589
590 memset(&template, 0, sizeof(template));
591
592 memcpy(template.addr1, wl->bssid, ETH_ALEN);
593 memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
594 memcpy(template.addr3, wl->bssid, ETH_ALEN);
595
596 template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
597 IEEE80211_STYPE_QOS_NULLFUNC |
598 IEEE80211_FCTL_TODS);
599
600 /* FIXME: not sure what priority to use here */
601 template.qos_ctrl = cpu_to_le16(0);
602
603 return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
604 sizeof(template));
605 }
606
607 static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
608 {
609 return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
610 }
611
612 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
613 {
614 struct wl1251 *wl = hw->priv;
615 struct ieee80211_conf *conf = &hw->conf;
616 int channel, ret = 0;
617
618 channel = ieee80211_frequency_to_channel(
619 conf->chandef.chan->center_freq);
620
621 wl1251_debug(DEBUG_MAC80211,
622 "mac80211 config ch %d monitor %s psm %s power %d",
623 channel,
624 conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
625 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
626 conf->power_level);
627
628 mutex_lock(&wl->mutex);
629
630 ret = wl1251_ps_elp_wakeup(wl);
631 if (ret < 0)
632 goto out;
633
634 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
635 u32 mode;
636
637 if (conf->flags & IEEE80211_CONF_MONITOR) {
638 wl->monitor_present = true;
639 mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
640 } else {
641 wl->monitor_present = false;
642 mode = 0;
643 }
644
645 ret = wl1251_acx_feature_cfg(wl, mode);
646 if (ret < 0)
647 goto out_sleep;
648 }
649
650 if (channel != wl->channel) {
651 wl->channel = channel;
652
653 /*
654 * Use ENABLE_RX command for channel switching when no
655 * interface is present (monitor mode only).
656 * This leaves the tx path disabled in firmware, whereas
657 * the usual JOIN command seems to transmit some frames
658 * at firmware level.
659 */
660 if (wl->vif == NULL) {
661 wl->joined = false;
662 ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
663 } else {
664 ret = wl1251_join(wl, wl->bss_type, wl->channel,
665 wl->beacon_int, wl->dtim_period);
666 }
667 if (ret < 0)
668 goto out_sleep;
669 }
670
671 if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
672 wl1251_debug(DEBUG_PSM, "psm enabled");
673
674 wl->psm_requested = true;
675
676 wl->dtim_period = conf->ps_dtim_period;
677
678 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
679 wl->dtim_period);
680
681 /*
682 * mac80211 enables PSM only if we're already associated.
683 */
684 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
685 if (ret < 0)
686 goto out_sleep;
687 } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
688 wl1251_debug(DEBUG_PSM, "psm disabled");
689
690 wl->psm_requested = false;
691
692 if (wl->station_mode != STATION_ACTIVE_MODE) {
693 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
694 if (ret < 0)
695 goto out_sleep;
696 }
697 }
698
699 if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
700 if (conf->flags & IEEE80211_CONF_IDLE) {
701 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
702 if (ret < 0)
703 goto out_sleep;
704 } else {
705 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
706 if (ret < 0)
707 goto out_sleep;
708 ret = wl1251_join(wl, wl->bss_type, wl->channel,
709 wl->beacon_int, wl->dtim_period);
710 if (ret < 0)
711 goto out_sleep;
712 }
713 }
714
715 if (conf->power_level != wl->power_level) {
716 ret = wl1251_acx_tx_power(wl, conf->power_level);
717 if (ret < 0)
718 goto out_sleep;
719
720 wl->power_level = conf->power_level;
721 }
722
723 out_sleep:
724 wl1251_ps_elp_sleep(wl);
725
726 out:
727 mutex_unlock(&wl->mutex);
728
729 return ret;
730 }
731
732 struct wl1251_filter_params {
733 bool enabled;
734 int mc_list_length;
735 u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
736 };
737
738 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
739 struct netdev_hw_addr_list *mc_list)
740 {
741 struct wl1251_filter_params *fp;
742 struct netdev_hw_addr *ha;
743 struct wl1251 *wl = hw->priv;
744
745 if (unlikely(wl->state == WL1251_STATE_OFF))
746 return 0;
747
748 fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
749 if (!fp) {
750 wl1251_error("Out of memory setting filters.");
751 return 0;
752 }
753
754 /* update multicast filtering parameters */
755 fp->mc_list_length = 0;
756 if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
757 fp->enabled = false;
758 } else {
759 fp->enabled = true;
760 netdev_hw_addr_list_for_each(ha, mc_list) {
761 memcpy(fp->mc_list[fp->mc_list_length],
762 ha->addr, ETH_ALEN);
763 fp->mc_list_length++;
764 }
765 }
766
767 return (u64)(unsigned long)fp;
768 }
769
770 #define WL1251_SUPPORTED_FILTERS (FIF_ALLMULTI | \
771 FIF_FCSFAIL | \
772 FIF_BCN_PRBRESP_PROMISC | \
773 FIF_CONTROL | \
774 FIF_OTHER_BSS | \
775 FIF_PROBE_REQ)
776
777 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
778 unsigned int changed,
779 unsigned int *total, u64 multicast)
780 {
781 struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
782 struct wl1251 *wl = hw->priv;
783 int ret;
784
785 wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
786
787 *total &= WL1251_SUPPORTED_FILTERS;
788 changed &= WL1251_SUPPORTED_FILTERS;
789
790 if (changed == 0) {
791 /* no filters which we support changed */
792 kfree(fp);
793 return;
794 }
795
796 mutex_lock(&wl->mutex);
797
798 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
799 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
800
801 if (*total & FIF_ALLMULTI)
802 /*
803 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
804 * all multicast frames
805 */
806 wl->rx_config &= ~CFG_MC_FILTER_EN;
807 if (*total & FIF_FCSFAIL)
808 wl->rx_filter |= CFG_RX_FCS_ERROR;
809 if (*total & FIF_BCN_PRBRESP_PROMISC) {
810 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
811 wl->rx_config &= ~CFG_SSID_FILTER_EN;
812 }
813 if (*total & FIF_CONTROL)
814 wl->rx_filter |= CFG_RX_CTL_EN;
815 if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
816 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
817 if (*total & FIF_PROBE_REQ)
818 wl->rx_filter |= CFG_RX_PREQ_EN;
819
820 if (wl->state == WL1251_STATE_OFF)
821 goto out;
822
823 ret = wl1251_ps_elp_wakeup(wl);
824 if (ret < 0)
825 goto out;
826
827 if (*total & FIF_ALLMULTI)
828 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
829 else if (fp)
830 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
831 fp->mc_list,
832 fp->mc_list_length);
833 if (ret < 0)
834 goto out;
835
836 /* send filters to firmware */
837 wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
838
839 wl1251_ps_elp_sleep(wl);
840
841 out:
842 mutex_unlock(&wl->mutex);
843 kfree(fp);
844 }
845
846 /* HW encryption */
847 static int wl1251_set_key_type(struct wl1251 *wl,
848 struct wl1251_cmd_set_keys *key,
849 enum set_key_cmd cmd,
850 struct ieee80211_key_conf *mac80211_key,
851 const u8 *addr)
852 {
853 switch (mac80211_key->cipher) {
854 case WLAN_CIPHER_SUITE_WEP40:
855 case WLAN_CIPHER_SUITE_WEP104:
856 if (is_broadcast_ether_addr(addr))
857 key->key_type = KEY_WEP_DEFAULT;
858 else
859 key->key_type = KEY_WEP_ADDR;
860
861 mac80211_key->hw_key_idx = mac80211_key->keyidx;
862 break;
863 case WLAN_CIPHER_SUITE_TKIP:
864 if (is_broadcast_ether_addr(addr))
865 key->key_type = KEY_TKIP_MIC_GROUP;
866 else
867 key->key_type = KEY_TKIP_MIC_PAIRWISE;
868
869 mac80211_key->hw_key_idx = mac80211_key->keyidx;
870 break;
871 case WLAN_CIPHER_SUITE_CCMP:
872 if (is_broadcast_ether_addr(addr))
873 key->key_type = KEY_AES_GROUP;
874 else
875 key->key_type = KEY_AES_PAIRWISE;
876 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
877 break;
878 default:
879 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
880 return -EOPNOTSUPP;
881 }
882
883 return 0;
884 }
885
886 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
887 struct ieee80211_vif *vif,
888 struct ieee80211_sta *sta,
889 struct ieee80211_key_conf *key)
890 {
891 struct wl1251 *wl = hw->priv;
892 struct wl1251_cmd_set_keys *wl_cmd;
893 const u8 *addr;
894 int ret;
895
896 static const u8 bcast_addr[ETH_ALEN] =
897 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
898
899 wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
900
901 wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
902 if (!wl_cmd) {
903 ret = -ENOMEM;
904 goto out;
905 }
906
907 addr = sta ? sta->addr : bcast_addr;
908
909 wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
910 wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
911 wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
912 key->cipher, key->keyidx, key->keylen, key->flags);
913 wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
914
915 if (is_zero_ether_addr(addr)) {
916 /* We dont support TX only encryption */
917 ret = -EOPNOTSUPP;
918 goto out;
919 }
920
921 mutex_lock(&wl->mutex);
922
923 switch (cmd) {
924 case SET_KEY:
925 if (wl->monitor_present) {
926 ret = -EOPNOTSUPP;
927 goto out_unlock;
928 }
929 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
930 break;
931 case DISABLE_KEY:
932 wl_cmd->key_action = KEY_REMOVE;
933 break;
934 default:
935 wl1251_error("Unsupported key cmd 0x%x", cmd);
936 break;
937 }
938
939 ret = wl1251_ps_elp_wakeup(wl);
940 if (ret < 0)
941 goto out_unlock;
942
943 ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
944 if (ret < 0) {
945 wl1251_error("Set KEY type failed");
946 goto out_sleep;
947 }
948
949 if (wl_cmd->key_type != KEY_WEP_DEFAULT)
950 memcpy(wl_cmd->addr, addr, ETH_ALEN);
951
952 if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
953 (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
954 /*
955 * We get the key in the following form:
956 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
957 * but the target is expecting:
958 * TKIP - RX MIC - TX MIC
959 */
960 memcpy(wl_cmd->key, key->key, 16);
961 memcpy(wl_cmd->key + 16, key->key + 24, 8);
962 memcpy(wl_cmd->key + 24, key->key + 16, 8);
963
964 } else {
965 memcpy(wl_cmd->key, key->key, key->keylen);
966 }
967 wl_cmd->key_size = key->keylen;
968
969 wl_cmd->id = key->keyidx;
970 wl_cmd->ssid_profile = 0;
971
972 wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
973
974 ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
975 if (ret < 0) {
976 wl1251_warning("could not set keys");
977 goto out_sleep;
978 }
979
980 out_sleep:
981 wl1251_ps_elp_sleep(wl);
982
983 out_unlock:
984 mutex_unlock(&wl->mutex);
985
986 out:
987 kfree(wl_cmd);
988
989 return ret;
990 }
991
992 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
993 struct ieee80211_vif *vif,
994 struct ieee80211_scan_request *hw_req)
995 {
996 struct cfg80211_scan_request *req = &hw_req->req;
997 struct wl1251 *wl = hw->priv;
998 struct sk_buff *skb;
999 size_t ssid_len = 0;
1000 u8 *ssid = NULL;
1001 int ret;
1002
1003 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
1004
1005 if (req->n_ssids) {
1006 ssid = req->ssids[0].ssid;
1007 ssid_len = req->ssids[0].ssid_len;
1008 }
1009
1010 mutex_lock(&wl->mutex);
1011
1012 if (wl->scanning) {
1013 wl1251_debug(DEBUG_SCAN, "scan already in progress");
1014 ret = -EINVAL;
1015 goto out;
1016 }
1017
1018 ret = wl1251_ps_elp_wakeup(wl);
1019 if (ret < 0)
1020 goto out;
1021
1022 if (hw->conf.flags & IEEE80211_CONF_IDLE) {
1023 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
1024 if (ret < 0)
1025 goto out_sleep;
1026 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1027 wl->beacon_int, wl->dtim_period);
1028 if (ret < 0)
1029 goto out_sleep;
1030 }
1031
1032 skb = ieee80211_probereq_get(wl->hw, wl->vif->addr, ssid, ssid_len,
1033 req->ie_len);
1034 if (!skb) {
1035 ret = -ENOMEM;
1036 goto out_idle;
1037 }
1038 if (req->ie_len)
1039 skb_put_data(skb, req->ie, req->ie_len);
1040
1041 ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1042 skb->len);
1043 dev_kfree_skb(skb);
1044 if (ret < 0)
1045 goto out_idle;
1046
1047 ret = wl1251_cmd_trigger_scan_to(wl, 0);
1048 if (ret < 0)
1049 goto out_idle;
1050
1051 wl->scanning = true;
1052
1053 ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1054 req->n_channels, WL1251_SCAN_NUM_PROBES);
1055 if (ret < 0) {
1056 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1057 wl->scanning = false;
1058 goto out_idle;
1059 }
1060 goto out_sleep;
1061
1062 out_idle:
1063 if (hw->conf.flags & IEEE80211_CONF_IDLE)
1064 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1065 out_sleep:
1066 wl1251_ps_elp_sleep(wl);
1067
1068 out:
1069 mutex_unlock(&wl->mutex);
1070
1071 return ret;
1072 }
1073
1074 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1075 {
1076 struct wl1251 *wl = hw->priv;
1077 int ret;
1078
1079 mutex_lock(&wl->mutex);
1080
1081 ret = wl1251_ps_elp_wakeup(wl);
1082 if (ret < 0)
1083 goto out;
1084
1085 ret = wl1251_acx_rts_threshold(wl, (u16) value);
1086 if (ret < 0)
1087 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1088
1089 wl1251_ps_elp_sleep(wl);
1090
1091 out:
1092 mutex_unlock(&wl->mutex);
1093
1094 return ret;
1095 }
1096
1097 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1098 struct ieee80211_vif *vif,
1099 struct ieee80211_bss_conf *bss_conf,
1100 u32 changed)
1101 {
1102 struct wl1251 *wl = hw->priv;
1103 struct sk_buff *beacon, *skb;
1104 bool enable;
1105 int ret;
1106
1107 wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1108
1109 mutex_lock(&wl->mutex);
1110
1111 ret = wl1251_ps_elp_wakeup(wl);
1112 if (ret < 0)
1113 goto out;
1114
1115 if (changed & BSS_CHANGED_CQM) {
1116 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1117 WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1118 WL1251_DEFAULT_LOW_RSSI_DEPTH,
1119 WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1120 if (ret < 0)
1121 goto out;
1122 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1123 }
1124
1125 if ((changed & BSS_CHANGED_BSSID) &&
1126 memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1127 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1128
1129 if (!is_zero_ether_addr(wl->bssid)) {
1130 ret = wl1251_build_null_data(wl);
1131 if (ret < 0)
1132 goto out_sleep;
1133
1134 ret = wl1251_build_qos_null_data(wl);
1135 if (ret < 0)
1136 goto out_sleep;
1137
1138 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1139 wl->beacon_int, wl->dtim_period);
1140 if (ret < 0)
1141 goto out_sleep;
1142 }
1143 }
1144
1145 if (changed & BSS_CHANGED_ASSOC) {
1146 if (bss_conf->assoc) {
1147 wl->beacon_int = bss_conf->beacon_int;
1148
1149 skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1150 if (!skb)
1151 goto out_sleep;
1152
1153 ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1154 skb->data,
1155 skb->len);
1156 dev_kfree_skb(skb);
1157 if (ret < 0)
1158 goto out_sleep;
1159
1160 ret = wl1251_acx_aid(wl, bss_conf->aid);
1161 if (ret < 0)
1162 goto out_sleep;
1163 } else {
1164 /* use defaults when not associated */
1165 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1166 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1167 }
1168 }
1169 if (changed & BSS_CHANGED_ERP_SLOT) {
1170 if (bss_conf->use_short_slot)
1171 ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1172 else
1173 ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1174 if (ret < 0) {
1175 wl1251_warning("Set slot time failed %d", ret);
1176 goto out_sleep;
1177 }
1178 }
1179
1180 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1181 if (bss_conf->use_short_preamble)
1182 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1183 else
1184 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1185 }
1186
1187 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1188 if (bss_conf->use_cts_prot)
1189 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1190 else
1191 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1192 if (ret < 0) {
1193 wl1251_warning("Set ctsprotect failed %d", ret);
1194 goto out_sleep;
1195 }
1196 }
1197
1198 if (changed & BSS_CHANGED_ARP_FILTER) {
1199 __be32 addr = bss_conf->arp_addr_list[0];
1200 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1201
1202 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1203 wl1251_acx_arp_ip_filter(wl, enable, addr);
1204
1205 if (ret < 0)
1206 goto out_sleep;
1207 }
1208
1209 if (changed & BSS_CHANGED_BEACON) {
1210 beacon = ieee80211_beacon_get(hw, vif);
1211 if (!beacon)
1212 goto out_sleep;
1213
1214 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1215 beacon->len);
1216
1217 if (ret < 0) {
1218 dev_kfree_skb(beacon);
1219 goto out_sleep;
1220 }
1221
1222 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1223 beacon->len);
1224
1225 dev_kfree_skb(beacon);
1226
1227 if (ret < 0)
1228 goto out_sleep;
1229
1230 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1231 wl->beacon_int, wl->dtim_period);
1232
1233 if (ret < 0)
1234 goto out_sleep;
1235 }
1236
1237 out_sleep:
1238 wl1251_ps_elp_sleep(wl);
1239
1240 out:
1241 mutex_unlock(&wl->mutex);
1242 }
1243
1244
1245 /* can't be const, mac80211 writes to this */
1246 static struct ieee80211_rate wl1251_rates[] = {
1247 { .bitrate = 10,
1248 .hw_value = 0x1,
1249 .hw_value_short = 0x1, },
1250 { .bitrate = 20,
1251 .hw_value = 0x2,
1252 .hw_value_short = 0x2,
1253 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1254 { .bitrate = 55,
1255 .hw_value = 0x4,
1256 .hw_value_short = 0x4,
1257 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1258 { .bitrate = 110,
1259 .hw_value = 0x20,
1260 .hw_value_short = 0x20,
1261 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1262 { .bitrate = 60,
1263 .hw_value = 0x8,
1264 .hw_value_short = 0x8, },
1265 { .bitrate = 90,
1266 .hw_value = 0x10,
1267 .hw_value_short = 0x10, },
1268 { .bitrate = 120,
1269 .hw_value = 0x40,
1270 .hw_value_short = 0x40, },
1271 { .bitrate = 180,
1272 .hw_value = 0x80,
1273 .hw_value_short = 0x80, },
1274 { .bitrate = 240,
1275 .hw_value = 0x200,
1276 .hw_value_short = 0x200, },
1277 { .bitrate = 360,
1278 .hw_value = 0x400,
1279 .hw_value_short = 0x400, },
1280 { .bitrate = 480,
1281 .hw_value = 0x800,
1282 .hw_value_short = 0x800, },
1283 { .bitrate = 540,
1284 .hw_value = 0x1000,
1285 .hw_value_short = 0x1000, },
1286 };
1287
1288 /* can't be const, mac80211 writes to this */
1289 static struct ieee80211_channel wl1251_channels[] = {
1290 { .hw_value = 1, .center_freq = 2412},
1291 { .hw_value = 2, .center_freq = 2417},
1292 { .hw_value = 3, .center_freq = 2422},
1293 { .hw_value = 4, .center_freq = 2427},
1294 { .hw_value = 5, .center_freq = 2432},
1295 { .hw_value = 6, .center_freq = 2437},
1296 { .hw_value = 7, .center_freq = 2442},
1297 { .hw_value = 8, .center_freq = 2447},
1298 { .hw_value = 9, .center_freq = 2452},
1299 { .hw_value = 10, .center_freq = 2457},
1300 { .hw_value = 11, .center_freq = 2462},
1301 { .hw_value = 12, .center_freq = 2467},
1302 { .hw_value = 13, .center_freq = 2472},
1303 };
1304
1305 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1306 struct ieee80211_vif *vif, u16 queue,
1307 const struct ieee80211_tx_queue_params *params)
1308 {
1309 enum wl1251_acx_ps_scheme ps_scheme;
1310 struct wl1251 *wl = hw->priv;
1311 int ret;
1312
1313 mutex_lock(&wl->mutex);
1314
1315 wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1316
1317 ret = wl1251_ps_elp_wakeup(wl);
1318 if (ret < 0)
1319 goto out;
1320
1321 /* mac80211 uses units of 32 usec */
1322 ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1323 params->cw_min, params->cw_max,
1324 params->aifs, params->txop * 32);
1325 if (ret < 0)
1326 goto out_sleep;
1327
1328 if (params->uapsd)
1329 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1330 else
1331 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1332
1333 ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1334 CHANNEL_TYPE_EDCF,
1335 wl1251_tx_get_queue(queue), ps_scheme,
1336 WL1251_ACX_ACK_POLICY_LEGACY);
1337 if (ret < 0)
1338 goto out_sleep;
1339
1340 out_sleep:
1341 wl1251_ps_elp_sleep(wl);
1342
1343 out:
1344 mutex_unlock(&wl->mutex);
1345
1346 return ret;
1347 }
1348
1349 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1350 struct survey_info *survey)
1351 {
1352 struct wl1251 *wl = hw->priv;
1353 struct ieee80211_conf *conf = &hw->conf;
1354
1355 if (idx != 0)
1356 return -ENOENT;
1357
1358 survey->channel = conf->chandef.chan;
1359 survey->filled = SURVEY_INFO_NOISE_DBM;
1360 survey->noise = wl->noise;
1361
1362 return 0;
1363 }
1364
1365 /* can't be const, mac80211 writes to this */
1366 static struct ieee80211_supported_band wl1251_band_2ghz = {
1367 .channels = wl1251_channels,
1368 .n_channels = ARRAY_SIZE(wl1251_channels),
1369 .bitrates = wl1251_rates,
1370 .n_bitrates = ARRAY_SIZE(wl1251_rates),
1371 };
1372
1373 static const struct ieee80211_ops wl1251_ops = {
1374 .start = wl1251_op_start,
1375 .stop = wl1251_op_stop,
1376 .add_interface = wl1251_op_add_interface,
1377 .remove_interface = wl1251_op_remove_interface,
1378 .config = wl1251_op_config,
1379 .prepare_multicast = wl1251_op_prepare_multicast,
1380 .configure_filter = wl1251_op_configure_filter,
1381 .tx = wl1251_op_tx,
1382 .set_key = wl1251_op_set_key,
1383 .hw_scan = wl1251_op_hw_scan,
1384 .bss_info_changed = wl1251_op_bss_info_changed,
1385 .set_rts_threshold = wl1251_op_set_rts_threshold,
1386 .conf_tx = wl1251_op_conf_tx,
1387 .get_survey = wl1251_op_get_survey,
1388 };
1389
1390 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1391 {
1392 unsigned long timeout;
1393
1394 wl1251_reg_write32(wl, EE_ADDR, offset);
1395 wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1396
1397 /* EE_CTL_READ clears when data is ready */
1398 timeout = jiffies + msecs_to_jiffies(100);
1399 while (1) {
1400 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1401 break;
1402
1403 if (time_after(jiffies, timeout))
1404 return -ETIMEDOUT;
1405
1406 msleep(1);
1407 }
1408
1409 *data = wl1251_reg_read32(wl, EE_DATA);
1410 return 0;
1411 }
1412
1413 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1414 u8 *data, size_t len)
1415 {
1416 size_t i;
1417 int ret;
1418
1419 wl1251_reg_write32(wl, EE_START, 0);
1420
1421 for (i = 0; i < len; i++) {
1422 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1423 if (ret < 0)
1424 return ret;
1425 }
1426
1427 return 0;
1428 }
1429
1430 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1431 {
1432 u8 mac[ETH_ALEN];
1433 int i, ret;
1434
1435 wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1436
1437 ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1438 if (ret < 0) {
1439 wl1251_warning("failed to read MAC address from EEPROM");
1440 return ret;
1441 }
1442
1443 /* MAC is stored in reverse order */
1444 for (i = 0; i < ETH_ALEN; i++)
1445 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1446
1447 return 0;
1448 }
1449
1450 static int wl1251_register_hw(struct wl1251 *wl)
1451 {
1452 int ret;
1453
1454 if (wl->mac80211_registered)
1455 return 0;
1456
1457 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1458
1459 ret = ieee80211_register_hw(wl->hw);
1460 if (ret < 0) {
1461 wl1251_error("unable to register mac80211 hw: %d", ret);
1462 return ret;
1463 }
1464
1465 wl->mac80211_registered = true;
1466
1467 wl1251_notice("loaded");
1468
1469 return 0;
1470 }
1471
1472 int wl1251_init_ieee80211(struct wl1251 *wl)
1473 {
1474 int ret;
1475
1476 /* The tx descriptor buffer and the TKIP space */
1477 wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1478 + WL1251_TKIP_IV_SPACE;
1479
1480 /* unit us */
1481 /* FIXME: find a proper value */
1482
1483 ieee80211_hw_set(wl->hw, SIGNAL_DBM);
1484 ieee80211_hw_set(wl->hw, SUPPORTS_PS);
1485
1486 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1487 BIT(NL80211_IFTYPE_ADHOC);
1488 wl->hw->wiphy->max_scan_ssids = 1;
1489 wl->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wl1251_band_2ghz;
1490
1491 wl->hw->queues = 4;
1492
1493 if (wl->use_eeprom)
1494 wl1251_read_eeprom_mac(wl);
1495
1496 ret = wl1251_register_hw(wl);
1497 if (ret)
1498 goto out;
1499
1500 wl1251_debugfs_init(wl);
1501 wl1251_notice("initialized");
1502
1503 ret = 0;
1504
1505 out:
1506 return ret;
1507 }
1508 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1509
1510 struct ieee80211_hw *wl1251_alloc_hw(void)
1511 {
1512 struct ieee80211_hw *hw;
1513 struct wl1251 *wl;
1514 int i;
1515 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1516
1517 hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1518 if (!hw) {
1519 wl1251_error("could not alloc ieee80211_hw");
1520 return ERR_PTR(-ENOMEM);
1521 }
1522
1523 wl = hw->priv;
1524 memset(wl, 0, sizeof(*wl));
1525
1526 wl->hw = hw;
1527
1528 wl->data_in_count = 0;
1529
1530 skb_queue_head_init(&wl->tx_queue);
1531
1532 INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1533 wl->channel = WL1251_DEFAULT_CHANNEL;
1534 wl->monitor_present = false;
1535 wl->joined = false;
1536 wl->scanning = false;
1537 wl->bss_type = MAX_BSS_TYPE;
1538 wl->default_key = 0;
1539 wl->listen_int = 1;
1540 wl->rx_counter = 0;
1541 wl->rx_handled = 0;
1542 wl->rx_current_buffer = 0;
1543 wl->rx_last_id = 0;
1544 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1545 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1546 wl->elp = false;
1547 wl->station_mode = STATION_ACTIVE_MODE;
1548 wl->psm_requested = false;
1549 wl->psm_entry_retry = 0;
1550 wl->tx_queue_stopped = false;
1551 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1552 wl->rssi_thold = 0;
1553 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1554 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1555 wl->vif = NULL;
1556
1557 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1558 wl->tx_frames[i] = NULL;
1559
1560 wl->next_tx_complete = 0;
1561
1562 INIT_WORK(&wl->irq_work, wl1251_irq_work);
1563 INIT_WORK(&wl->tx_work, wl1251_tx_work);
1564
1565 /*
1566 * In case our MAC address is not correctly set,
1567 * we use a random but Nokia MAC.
1568 */
1569 memcpy(wl->mac_addr, nokia_oui, 3);
1570 get_random_bytes(wl->mac_addr + 3, 3);
1571
1572 wl->state = WL1251_STATE_OFF;
1573 mutex_init(&wl->mutex);
1574 spin_lock_init(&wl->wl_lock);
1575
1576 wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1577 wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1578
1579 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1580 if (!wl->rx_descriptor) {
1581 wl1251_error("could not allocate memory for rx descriptor");
1582 ieee80211_free_hw(hw);
1583 return ERR_PTR(-ENOMEM);
1584 }
1585
1586 return hw;
1587 }
1588 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1589
1590 int wl1251_free_hw(struct wl1251 *wl)
1591 {
1592 ieee80211_unregister_hw(wl->hw);
1593
1594 wl1251_debugfs_exit(wl);
1595
1596 kfree(wl->target_mem_map);
1597 kfree(wl->data_path);
1598 vfree(wl->fw);
1599 wl->fw = NULL;
1600 kfree(wl->nvs);
1601 wl->nvs = NULL;
1602
1603 kfree(wl->rx_descriptor);
1604 wl->rx_descriptor = NULL;
1605
1606 ieee80211_free_hw(wl->hw);
1607
1608 return 0;
1609 }
1610 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1611
1612 MODULE_DESCRIPTION("TI wl1251 Wireless LAN Driver Core");
1613 MODULE_LICENSE("GPL");
1614 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1615 MODULE_FIRMWARE(WL1251_FW_NAME);
1616 MODULE_FIRMWARE(WL1251_NVS_NAME);
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