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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / wireless / ti / wl1251 / main.c
blob480a8d08487816eb830d93f7a246b29ff2d32b68
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This file is part of wl1251
4 *
5 * Copyright (C) 2008-2009 Nokia Corporation
6 */
7
8 #include <linux/module.h>
9 #include <linux/interrupt.h>
10 #include <linux/firmware.h>
11 #include <linux/delay.h>
12 #include <linux/irq.h>
13 #include <linux/crc32.h>
14 #include <linux/etherdevice.h>
15 #include <linux/vmalloc.h>
16 #include <linux/slab.h>
17 #include <linux/netdevice.h>
18
19 #include "wl1251.h"
20 #include "wl12xx_80211.h"
21 #include "reg.h"
22 #include "io.h"
23 #include "cmd.h"
24 #include "event.h"
25 #include "tx.h"
26 #include "rx.h"
27 #include "ps.h"
28 #include "init.h"
29 #include "debugfs.h"
30 #include "boot.h"
31
32 void wl1251_enable_interrupts(struct wl1251 *wl)
33 {
34 wl->if_ops->enable_irq(wl);
35 }
36
37 void wl1251_disable_interrupts(struct wl1251 *wl)
38 {
39 wl->if_ops->disable_irq(wl);
40 }
41
42 static int wl1251_power_off(struct wl1251 *wl)
43 {
44 return wl->if_ops->power(wl, false);
45 }
46
47 static int wl1251_power_on(struct wl1251 *wl)
48 {
49 return wl->if_ops->power(wl, true);
50 }
51
52 static int wl1251_fetch_firmware(struct wl1251 *wl)
53 {
54 const struct firmware *fw;
55 struct device *dev = wiphy_dev(wl->hw->wiphy);
56 int ret;
57
58 ret = request_firmware(&fw, WL1251_FW_NAME, dev);
59
60 if (ret < 0) {
61 wl1251_error("could not get firmware: %d", ret);
62 return ret;
63 }
64
65 if (fw->size % 4) {
66 wl1251_error("firmware size is not multiple of 32 bits: %zu",
67 fw->size);
68 ret = -EILSEQ;
69 goto out;
70 }
71
72 wl->fw_len = fw->size;
73 wl->fw = vmalloc(wl->fw_len);
74
75 if (!wl->fw) {
76 wl1251_error("could not allocate memory for the firmware");
77 ret = -ENOMEM;
78 goto out;
79 }
80
81 memcpy(wl->fw, fw->data, wl->fw_len);
82
83 ret = 0;
84
85 out:
86 release_firmware(fw);
87
88 return ret;
89 }
90
91 static int wl1251_fetch_nvs(struct wl1251 *wl)
92 {
93 const struct firmware *fw;
94 struct device *dev = wiphy_dev(wl->hw->wiphy);
95 int ret;
96
97 ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
98
99 if (ret < 0) {
100 wl1251_error("could not get nvs file: %d", ret);
101 return ret;
102 }
103
104 if (fw->size % 4) {
105 wl1251_error("nvs size is not multiple of 32 bits: %zu",
106 fw->size);
107 ret = -EILSEQ;
108 goto out;
109 }
110
111 wl->nvs = kmemdup(fw->data, fw->size, GFP_KERNEL);
112
113 if (!wl->nvs) {
114 wl1251_error("could not allocate memory for the nvs file");
115 ret = -ENOMEM;
116 goto out;
117 }
118
119 wl->nvs_len = fw->size;
120
121 ret = 0;
122
123 out:
124 release_firmware(fw);
125
126 return ret;
127 }
128
129 static void wl1251_fw_wakeup(struct wl1251 *wl)
130 {
131 u32 elp_reg;
132
133 elp_reg = ELPCTRL_WAKE_UP;
134 wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
135 elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
136
137 if (!(elp_reg & ELPCTRL_WLAN_READY))
138 wl1251_warning("WLAN not ready");
139 }
140
141 static int wl1251_chip_wakeup(struct wl1251 *wl)
142 {
143 int ret;
144
145 ret = wl1251_power_on(wl);
146 if (ret < 0)
147 return ret;
148
149 msleep(WL1251_POWER_ON_SLEEP);
150 wl->if_ops->reset(wl);
151
152 /* We don't need a real memory partition here, because we only want
153 * to use the registers at this point. */
154 wl1251_set_partition(wl,
155 0x00000000,
156 0x00000000,
157 REGISTERS_BASE,
158 REGISTERS_DOWN_SIZE);
159
160 /* ELP module wake up */
161 wl1251_fw_wakeup(wl);
162
163 /* whal_FwCtrl_BootSm() */
164
165 /* 0. read chip id from CHIP_ID */
166 wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
167
168 /* 1. check if chip id is valid */
169
170 switch (wl->chip_id) {
171 case CHIP_ID_1251_PG12:
172 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
173 wl->chip_id);
174 break;
175 case CHIP_ID_1251_PG11:
176 wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
177 wl->chip_id);
178 break;
179 case CHIP_ID_1251_PG10:
180 default:
181 wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
182 ret = -ENODEV;
183 goto out;
184 }
185
186 if (wl->fw == NULL) {
187 ret = wl1251_fetch_firmware(wl);
188 if (ret < 0)
189 goto out;
190 }
191
192 out:
193 return ret;
194 }
195
196 #define WL1251_IRQ_LOOP_COUNT 10
197 static void wl1251_irq_work(struct work_struct *work)
198 {
199 u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
200 struct wl1251 *wl =
201 container_of(work, struct wl1251, irq_work);
202 int ret;
203
204 mutex_lock(&wl->mutex);
205
206 wl1251_debug(DEBUG_IRQ, "IRQ work");
207
208 if (wl->state == WL1251_STATE_OFF)
209 goto out;
210
211 ret = wl1251_ps_elp_wakeup(wl);
212 if (ret < 0)
213 goto out;
214
215 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
216
217 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
218 wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
219
220 do {
221 if (wl->data_path) {
222 wl->rx_counter = wl1251_mem_read32(
223 wl, wl->data_path->rx_control_addr);
224
225 /* We handle a frmware bug here */
226 switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
227 case 0:
228 wl1251_debug(DEBUG_IRQ,
229 "RX: FW and host in sync");
230 intr &= ~WL1251_ACX_INTR_RX0_DATA;
231 intr &= ~WL1251_ACX_INTR_RX1_DATA;
232 break;
233 case 1:
234 wl1251_debug(DEBUG_IRQ, "RX: FW +1");
235 intr |= WL1251_ACX_INTR_RX0_DATA;
236 intr &= ~WL1251_ACX_INTR_RX1_DATA;
237 break;
238 case 2:
239 wl1251_debug(DEBUG_IRQ, "RX: FW +2");
240 intr |= WL1251_ACX_INTR_RX0_DATA;
241 intr |= WL1251_ACX_INTR_RX1_DATA;
242 break;
243 default:
244 wl1251_warning(
245 "RX: FW and host out of sync: %d",
246 wl->rx_counter - wl->rx_handled);
247 break;
248 }
249
250 wl->rx_handled = wl->rx_counter;
251
252 wl1251_debug(DEBUG_IRQ, "RX counter: %d",
253 wl->rx_counter);
254 }
255
256 intr &= wl->intr_mask;
257
258 if (intr == 0) {
259 wl1251_debug(DEBUG_IRQ, "INTR is 0");
260 goto out_sleep;
261 }
262
263 if (intr & WL1251_ACX_INTR_RX0_DATA) {
264 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
265 wl1251_rx(wl);
266 }
267
268 if (intr & WL1251_ACX_INTR_RX1_DATA) {
269 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
270 wl1251_rx(wl);
271 }
272
273 if (intr & WL1251_ACX_INTR_TX_RESULT) {
274 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
275 wl1251_tx_complete(wl);
276 }
277
278 if (intr & WL1251_ACX_INTR_EVENT_A) {
279 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
280 wl1251_event_handle(wl, 0);
281 }
282
283 if (intr & WL1251_ACX_INTR_EVENT_B) {
284 wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
285 wl1251_event_handle(wl, 1);
286 }
287
288 if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
289 wl1251_debug(DEBUG_IRQ,
290 "WL1251_ACX_INTR_INIT_COMPLETE");
291
292 if (--ctr == 0)
293 break;
294
295 intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
296 } while (intr);
297
298 out_sleep:
299 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
300 wl1251_ps_elp_sleep(wl);
301
302 out:
303 mutex_unlock(&wl->mutex);
304 }
305
306 static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
307 u16 beacon_interval, u8 dtim_period)
308 {
309 int ret;
310
311 ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
312 DEFAULT_HW_GEN_MODULATION_TYPE,
313 wl->tx_mgmt_frm_rate,
314 wl->tx_mgmt_frm_mod);
315 if (ret < 0)
316 goto out;
317
318 /*
319 * Join command applies filters, and if we are not associated,
320 * BSSID filter must be disabled for association to work.
321 */
322 if (is_zero_ether_addr(wl->bssid))
323 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
324
325 ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
326 dtim_period);
327 if (ret < 0)
328 goto out;
329
330 ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
331 if (ret < 0)
332 wl1251_warning("join timeout");
333
334 out:
335 return ret;
336 }
337
338 static void wl1251_op_tx(struct ieee80211_hw *hw,
339 struct ieee80211_tx_control *control,
340 struct sk_buff *skb)
341 {
342 struct wl1251 *wl = hw->priv;
343 unsigned long flags;
344
345 skb_queue_tail(&wl->tx_queue, skb);
346
347 /*
348 * The chip specific setup must run before the first TX packet -
349 * before that, the tx_work will not be initialized!
350 */
351
352 ieee80211_queue_work(wl->hw, &wl->tx_work);
353
354 /*
355 * The workqueue is slow to process the tx_queue and we need stop
356 * the queue here, otherwise the queue will get too long.
357 */
358 if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
359 wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
360
361 spin_lock_irqsave(&wl->wl_lock, flags);
362 ieee80211_stop_queues(wl->hw);
363 wl->tx_queue_stopped = true;
364 spin_unlock_irqrestore(&wl->wl_lock, flags);
365 }
366 }
367
368 static int wl1251_op_start(struct ieee80211_hw *hw)
369 {
370 struct wl1251 *wl = hw->priv;
371 struct wiphy *wiphy = hw->wiphy;
372 int ret = 0;
373
374 wl1251_debug(DEBUG_MAC80211, "mac80211 start");
375
376 mutex_lock(&wl->mutex);
377
378 if (wl->state != WL1251_STATE_OFF) {
379 wl1251_error("cannot start because not in off state: %d",
380 wl->state);
381 ret = -EBUSY;
382 goto out;
383 }
384
385 ret = wl1251_chip_wakeup(wl);
386 if (ret < 0)
387 goto out;
388
389 ret = wl1251_boot(wl);
390 if (ret < 0)
391 goto out;
392
393 ret = wl1251_hw_init(wl);
394 if (ret < 0)
395 goto out;
396
397 ret = wl1251_acx_station_id(wl);
398 if (ret < 0)
399 goto out;
400
401 wl->state = WL1251_STATE_ON;
402
403 wl1251_info("firmware booted (%s)", wl->fw_ver);
404
405 /* update hw/fw version info in wiphy struct */
406 wiphy->hw_version = wl->chip_id;
407 strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
408
409 out:
410 if (ret < 0)
411 wl1251_power_off(wl);
412
413 mutex_unlock(&wl->mutex);
414
415 return ret;
416 }
417
418 static void wl1251_op_stop(struct ieee80211_hw *hw)
419 {
420 struct wl1251 *wl = hw->priv;
421
422 wl1251_info("down");
423
424 wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
425
426 mutex_lock(&wl->mutex);
427
428 WARN_ON(wl->state != WL1251_STATE_ON);
429
430 if (wl->scanning) {
431 struct cfg80211_scan_info info = {
432 .aborted = true,
433 };
434
435 ieee80211_scan_completed(wl->hw, &info);
436 wl->scanning = false;
437 }
438
439 wl->state = WL1251_STATE_OFF;
440
441 wl1251_disable_interrupts(wl);
442
443 mutex_unlock(&wl->mutex);
444
445 cancel_work_sync(&wl->irq_work);
446 cancel_work_sync(&wl->tx_work);
447 cancel_delayed_work_sync(&wl->elp_work);
448
449 mutex_lock(&wl->mutex);
450
451 /* let's notify MAC80211 about the remaining pending TX frames */
452 wl1251_tx_flush(wl);
453 wl1251_power_off(wl);
454
455 eth_zero_addr(wl->bssid);
456 wl->listen_int = 1;
457 wl->bss_type = MAX_BSS_TYPE;
458
459 wl->data_in_count = 0;
460 wl->rx_counter = 0;
461 wl->rx_handled = 0;
462 wl->rx_current_buffer = 0;
463 wl->rx_last_id = 0;
464 wl->next_tx_complete = 0;
465 wl->elp = false;
466 wl->station_mode = STATION_ACTIVE_MODE;
467 wl->psm_entry_retry = 0;
468 wl->tx_queue_stopped = false;
469 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
470 wl->rssi_thold = 0;
471 wl->channel = WL1251_DEFAULT_CHANNEL;
472 wl->monitor_present = false;
473 wl->joined = false;
474
475 wl1251_debugfs_reset(wl);
476
477 mutex_unlock(&wl->mutex);
478 }
479
480 static int wl1251_op_add_interface(struct ieee80211_hw *hw,
481 struct ieee80211_vif *vif)
482 {
483 struct wl1251 *wl = hw->priv;
484 int ret = 0;
485
486 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
487 IEEE80211_VIF_SUPPORTS_UAPSD |
488 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
489
490 wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
491 vif->type, vif->addr);
492
493 mutex_lock(&wl->mutex);
494 if (wl->vif) {
495 ret = -EBUSY;
496 goto out;
497 }
498
499 wl->vif = vif;
500
501 switch (vif->type) {
502 case NL80211_IFTYPE_STATION:
503 wl->bss_type = BSS_TYPE_STA_BSS;
504 break;
505 case NL80211_IFTYPE_ADHOC:
506 wl->bss_type = BSS_TYPE_IBSS;
507 break;
508 default:
509 ret = -EOPNOTSUPP;
510 goto out;
511 }
512
513 if (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
514 memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
515 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
516 ret = wl1251_acx_station_id(wl);
517 if (ret < 0)
518 goto out;
519 }
520
521 out:
522 mutex_unlock(&wl->mutex);
523 return ret;
524 }
525
526 static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
527 struct ieee80211_vif *vif)
528 {
529 struct wl1251 *wl = hw->priv;
530
531 mutex_lock(&wl->mutex);
532 wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
533 wl->vif = NULL;
534 eth_zero_addr(wl->bssid);
535 mutex_unlock(&wl->mutex);
536 }
537
538 static int wl1251_build_null_data(struct wl1251 *wl)
539 {
540 struct sk_buff *skb = NULL;
541 int size;
542 void *ptr;
543 int ret = -ENOMEM;
544
545 if (wl->bss_type == BSS_TYPE_IBSS) {
546 size = sizeof(struct wl12xx_null_data_template);
547 ptr = NULL;
548 } else {
549 skb = ieee80211_nullfunc_get(wl->hw, wl->vif, false);
550 if (!skb)
551 goto out;
552 size = skb->len;
553 ptr = skb->data;
554 }
555
556 ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
557
558 out:
559 dev_kfree_skb(skb);
560 if (ret)
561 wl1251_warning("cmd buld null data failed: %d", ret);
562
563 return ret;
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 bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
588 {
589 return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
590 }
591
592 static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
593 {
594 struct wl1251 *wl = hw->priv;
595 struct ieee80211_conf *conf = &hw->conf;
596 int channel, ret = 0;
597
598 channel = ieee80211_frequency_to_channel(
599 conf->chandef.chan->center_freq);
600
601 wl1251_debug(DEBUG_MAC80211,
602 "mac80211 config ch %d monitor %s psm %s power %d",
603 channel,
604 conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
605 conf->flags & IEEE80211_CONF_PS ? "on" : "off",
606 conf->power_level);
607
608 mutex_lock(&wl->mutex);
609
610 ret = wl1251_ps_elp_wakeup(wl);
611 if (ret < 0)
612 goto out;
613
614 if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
615 u32 mode;
616
617 if (conf->flags & IEEE80211_CONF_MONITOR) {
618 wl->monitor_present = true;
619 mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
620 } else {
621 wl->monitor_present = false;
622 mode = 0;
623 }
624
625 ret = wl1251_acx_feature_cfg(wl, mode);
626 if (ret < 0)
627 goto out_sleep;
628 }
629
630 if (channel != wl->channel) {
631 wl->channel = channel;
632
633 /*
634 * Use ENABLE_RX command for channel switching when no
635 * interface is present (monitor mode only).
636 * This leaves the tx path disabled in firmware, whereas
637 * the usual JOIN command seems to transmit some frames
638 * at firmware level.
639 */
640 if (wl->vif == NULL) {
641 wl->joined = false;
642 ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
643 } else {
644 ret = wl1251_join(wl, wl->bss_type, wl->channel,
645 wl->beacon_int, wl->dtim_period);
646 }
647 if (ret < 0)
648 goto out_sleep;
649 }
650
651 if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
652 wl1251_debug(DEBUG_PSM, "psm enabled");
653
654 wl->psm_requested = true;
655
656 wl->dtim_period = conf->ps_dtim_period;
657
658 ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
659 wl->dtim_period);
660
661 /*
662 * mac80211 enables PSM only if we're already associated.
663 */
664 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
665 if (ret < 0)
666 goto out_sleep;
667 } else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
668 wl1251_debug(DEBUG_PSM, "psm disabled");
669
670 wl->psm_requested = false;
671
672 if (wl->station_mode != STATION_ACTIVE_MODE) {
673 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
674 if (ret < 0)
675 goto out_sleep;
676 }
677 }
678
679 if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
680 if (conf->flags & IEEE80211_CONF_IDLE) {
681 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
682 if (ret < 0)
683 goto out_sleep;
684 } else {
685 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
686 if (ret < 0)
687 goto out_sleep;
688 ret = wl1251_join(wl, wl->bss_type, wl->channel,
689 wl->beacon_int, wl->dtim_period);
690 if (ret < 0)
691 goto out_sleep;
692 }
693 }
694
695 if (conf->power_level != wl->power_level) {
696 ret = wl1251_acx_tx_power(wl, conf->power_level);
697 if (ret < 0)
698 goto out_sleep;
699
700 wl->power_level = conf->power_level;
701 }
702
703 out_sleep:
704 wl1251_ps_elp_sleep(wl);
705
706 out:
707 mutex_unlock(&wl->mutex);
708
709 return ret;
710 }
711
712 struct wl1251_filter_params {
713 bool enabled;
714 int mc_list_length;
715 u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
716 };
717
718 static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
719 struct netdev_hw_addr_list *mc_list)
720 {
721 struct wl1251_filter_params *fp;
722 struct netdev_hw_addr *ha;
723 struct wl1251 *wl = hw->priv;
724
725 if (unlikely(wl->state == WL1251_STATE_OFF))
726 return 0;
727
728 fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
729 if (!fp) {
730 wl1251_error("Out of memory setting filters.");
731 return 0;
732 }
733
734 /* update multicast filtering parameters */
735 fp->mc_list_length = 0;
736 if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
737 fp->enabled = false;
738 } else {
739 fp->enabled = true;
740 netdev_hw_addr_list_for_each(ha, mc_list) {
741 memcpy(fp->mc_list[fp->mc_list_length],
742 ha->addr, ETH_ALEN);
743 fp->mc_list_length++;
744 }
745 }
746
747 return (u64)(unsigned long)fp;
748 }
749
750 #define WL1251_SUPPORTED_FILTERS (FIF_ALLMULTI | \
751 FIF_FCSFAIL | \
752 FIF_BCN_PRBRESP_PROMISC | \
753 FIF_CONTROL | \
754 FIF_OTHER_BSS | \
755 FIF_PROBE_REQ)
756
757 static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
758 unsigned int changed,
759 unsigned int *total, u64 multicast)
760 {
761 struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
762 struct wl1251 *wl = hw->priv;
763 int ret;
764
765 wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
766
767 *total &= WL1251_SUPPORTED_FILTERS;
768 changed &= WL1251_SUPPORTED_FILTERS;
769
770 if (changed == 0) {
771 /* no filters which we support changed */
772 kfree(fp);
773 return;
774 }
775
776 mutex_lock(&wl->mutex);
777
778 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
779 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
780
781 if (*total & FIF_ALLMULTI)
782 /*
783 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
784 * all multicast frames
785 */
786 wl->rx_config &= ~CFG_MC_FILTER_EN;
787 if (*total & FIF_FCSFAIL)
788 wl->rx_filter |= CFG_RX_FCS_ERROR;
789 if (*total & FIF_BCN_PRBRESP_PROMISC) {
790 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
791 wl->rx_config &= ~CFG_SSID_FILTER_EN;
792 }
793 if (*total & FIF_CONTROL)
794 wl->rx_filter |= CFG_RX_CTL_EN;
795 if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
796 wl->rx_config &= ~CFG_BSSID_FILTER_EN;
797 if (*total & FIF_PROBE_REQ)
798 wl->rx_filter |= CFG_RX_PREQ_EN;
799
800 if (wl->state == WL1251_STATE_OFF)
801 goto out;
802
803 ret = wl1251_ps_elp_wakeup(wl);
804 if (ret < 0)
805 goto out;
806
807 if (*total & FIF_ALLMULTI)
808 ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
809 else if (fp)
810 ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
811 fp->mc_list,
812 fp->mc_list_length);
813 if (ret < 0)
814 goto out;
815
816 /* send filters to firmware */
817 wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
818
819 wl1251_ps_elp_sleep(wl);
820
821 out:
822 mutex_unlock(&wl->mutex);
823 kfree(fp);
824 }
825
826 /* HW encryption */
827 static int wl1251_set_key_type(struct wl1251 *wl,
828 struct wl1251_cmd_set_keys *key,
829 enum set_key_cmd cmd,
830 struct ieee80211_key_conf *mac80211_key,
831 const u8 *addr)
832 {
833 switch (mac80211_key->cipher) {
834 case WLAN_CIPHER_SUITE_WEP40:
835 case WLAN_CIPHER_SUITE_WEP104:
836 if (is_broadcast_ether_addr(addr))
837 key->key_type = KEY_WEP_DEFAULT;
838 else
839 key->key_type = KEY_WEP_ADDR;
840
841 mac80211_key->hw_key_idx = mac80211_key->keyidx;
842 break;
843 case WLAN_CIPHER_SUITE_TKIP:
844 if (is_broadcast_ether_addr(addr))
845 key->key_type = KEY_TKIP_MIC_GROUP;
846 else
847 key->key_type = KEY_TKIP_MIC_PAIRWISE;
848
849 mac80211_key->hw_key_idx = mac80211_key->keyidx;
850 break;
851 case WLAN_CIPHER_SUITE_CCMP:
852 if (is_broadcast_ether_addr(addr))
853 key->key_type = KEY_AES_GROUP;
854 else
855 key->key_type = KEY_AES_PAIRWISE;
856 mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
857 break;
858 default:
859 wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
860 return -EOPNOTSUPP;
861 }
862
863 return 0;
864 }
865
866 static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
867 struct ieee80211_vif *vif,
868 struct ieee80211_sta *sta,
869 struct ieee80211_key_conf *key)
870 {
871 struct wl1251 *wl = hw->priv;
872 struct wl1251_cmd_set_keys *wl_cmd;
873 const u8 *addr;
874 int ret;
875
876 static const u8 bcast_addr[ETH_ALEN] =
877 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
878
879 wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
880
881 wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
882 if (!wl_cmd) {
883 ret = -ENOMEM;
884 goto out;
885 }
886
887 addr = sta ? sta->addr : bcast_addr;
888
889 wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
890 wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
891 wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
892 key->cipher, key->keyidx, key->keylen, key->flags);
893 wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
894
895 if (is_zero_ether_addr(addr)) {
896 /* We dont support TX only encryption */
897 ret = -EOPNOTSUPP;
898 goto out;
899 }
900
901 mutex_lock(&wl->mutex);
902
903 switch (cmd) {
904 case SET_KEY:
905 if (wl->monitor_present) {
906 ret = -EOPNOTSUPP;
907 goto out_unlock;
908 }
909 wl_cmd->key_action = KEY_ADD_OR_REPLACE;
910 break;
911 case DISABLE_KEY:
912 wl_cmd->key_action = KEY_REMOVE;
913 break;
914 default:
915 wl1251_error("Unsupported key cmd 0x%x", cmd);
916 break;
917 }
918
919 ret = wl1251_ps_elp_wakeup(wl);
920 if (ret < 0)
921 goto out_unlock;
922
923 ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
924 if (ret < 0) {
925 wl1251_error("Set KEY type failed");
926 goto out_sleep;
927 }
928
929 if (wl_cmd->key_type != KEY_WEP_DEFAULT)
930 memcpy(wl_cmd->addr, addr, ETH_ALEN);
931
932 if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
933 (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
934 /*
935 * We get the key in the following form:
936 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
937 * but the target is expecting:
938 * TKIP - RX MIC - TX MIC
939 */
940 memcpy(wl_cmd->key, key->key, 16);
941 memcpy(wl_cmd->key + 16, key->key + 24, 8);
942 memcpy(wl_cmd->key + 24, key->key + 16, 8);
943
944 } else {
945 memcpy(wl_cmd->key, key->key, key->keylen);
946 }
947 wl_cmd->key_size = key->keylen;
948
949 wl_cmd->id = key->keyidx;
950 wl_cmd->ssid_profile = 0;
951
952 wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
953
954 ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
955 if (ret < 0) {
956 wl1251_warning("could not set keys");
957 goto out_sleep;
958 }
959
960 out_sleep:
961 wl1251_ps_elp_sleep(wl);
962
963 out_unlock:
964 mutex_unlock(&wl->mutex);
965
966 out:
967 kfree(wl_cmd);
968
969 return ret;
970 }
971
972 static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
973 struct ieee80211_vif *vif,
974 struct ieee80211_scan_request *hw_req)
975 {
976 struct cfg80211_scan_request *req = &hw_req->req;
977 struct wl1251 *wl = hw->priv;
978 struct sk_buff *skb;
979 size_t ssid_len = 0;
980 u8 *ssid = NULL;
981 int ret;
982
983 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
984
985 if (req->n_ssids) {
986 ssid = req->ssids[0].ssid;
987 ssid_len = req->ssids[0].ssid_len;
988 }
989
990 mutex_lock(&wl->mutex);
991
992 if (wl->scanning) {
993 wl1251_debug(DEBUG_SCAN, "scan already in progress");
994 ret = -EINVAL;
995 goto out;
996 }
997
998 ret = wl1251_ps_elp_wakeup(wl);
999 if (ret < 0)
1000 goto out;
1001
1002 if (hw->conf.flags & IEEE80211_CONF_IDLE) {
1003 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
1004 if (ret < 0)
1005 goto out_sleep;
1006 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1007 wl->beacon_int, wl->dtim_period);
1008 if (ret < 0)
1009 goto out_sleep;
1010 }
1011
1012 skb = ieee80211_probereq_get(wl->hw, wl->vif->addr, ssid, ssid_len,
1013 req->ie_len);
1014 if (!skb) {
1015 ret = -ENOMEM;
1016 goto out_idle;
1017 }
1018 if (req->ie_len)
1019 skb_put_data(skb, req->ie, req->ie_len);
1020
1021 ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1022 skb->len);
1023 dev_kfree_skb(skb);
1024 if (ret < 0)
1025 goto out_idle;
1026
1027 ret = wl1251_cmd_trigger_scan_to(wl, 0);
1028 if (ret < 0)
1029 goto out_idle;
1030
1031 wl->scanning = true;
1032
1033 ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1034 req->n_channels, WL1251_SCAN_NUM_PROBES);
1035 if (ret < 0) {
1036 wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1037 wl->scanning = false;
1038 goto out_idle;
1039 }
1040 goto out_sleep;
1041
1042 out_idle:
1043 if (hw->conf.flags & IEEE80211_CONF_IDLE)
1044 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1045 out_sleep:
1046 wl1251_ps_elp_sleep(wl);
1047
1048 out:
1049 mutex_unlock(&wl->mutex);
1050
1051 return ret;
1052 }
1053
1054 static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1055 {
1056 struct wl1251 *wl = hw->priv;
1057 int ret;
1058
1059 mutex_lock(&wl->mutex);
1060
1061 ret = wl1251_ps_elp_wakeup(wl);
1062 if (ret < 0)
1063 goto out;
1064
1065 ret = wl1251_acx_rts_threshold(wl, (u16) value);
1066 if (ret < 0)
1067 wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1068
1069 wl1251_ps_elp_sleep(wl);
1070
1071 out:
1072 mutex_unlock(&wl->mutex);
1073
1074 return ret;
1075 }
1076
1077 static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1078 struct ieee80211_vif *vif,
1079 struct ieee80211_bss_conf *bss_conf,
1080 u32 changed)
1081 {
1082 struct wl1251 *wl = hw->priv;
1083 struct sk_buff *beacon, *skb;
1084 bool enable;
1085 int ret;
1086
1087 wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1088
1089 mutex_lock(&wl->mutex);
1090
1091 ret = wl1251_ps_elp_wakeup(wl);
1092 if (ret < 0)
1093 goto out;
1094
1095 if (changed & BSS_CHANGED_CQM) {
1096 ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1097 WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1098 WL1251_DEFAULT_LOW_RSSI_DEPTH,
1099 WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1100 if (ret < 0)
1101 goto out;
1102 wl->rssi_thold = bss_conf->cqm_rssi_thold;
1103 }
1104
1105 if ((changed & BSS_CHANGED_BSSID) &&
1106 memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1107 memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1108
1109 if (!is_zero_ether_addr(wl->bssid)) {
1110 ret = wl1251_build_null_data(wl);
1111 if (ret < 0)
1112 goto out_sleep;
1113
1114 ret = wl1251_build_qos_null_data(wl);
1115 if (ret < 0)
1116 goto out_sleep;
1117
1118 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1119 wl->beacon_int, wl->dtim_period);
1120 if (ret < 0)
1121 goto out_sleep;
1122 }
1123 }
1124
1125 if (changed & BSS_CHANGED_ASSOC) {
1126 if (bss_conf->assoc) {
1127 wl->beacon_int = bss_conf->beacon_int;
1128
1129 skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1130 if (!skb)
1131 goto out_sleep;
1132
1133 ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1134 skb->data,
1135 skb->len);
1136 dev_kfree_skb(skb);
1137 if (ret < 0)
1138 goto out_sleep;
1139
1140 ret = wl1251_acx_aid(wl, bss_conf->aid);
1141 if (ret < 0)
1142 goto out_sleep;
1143 } else {
1144 /* use defaults when not associated */
1145 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1146 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1147 }
1148 }
1149 if (changed & BSS_CHANGED_ERP_SLOT) {
1150 if (bss_conf->use_short_slot)
1151 ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1152 else
1153 ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1154 if (ret < 0) {
1155 wl1251_warning("Set slot time failed %d", ret);
1156 goto out_sleep;
1157 }
1158 }
1159
1160 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1161 if (bss_conf->use_short_preamble)
1162 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1163 else
1164 wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1165 }
1166
1167 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1168 if (bss_conf->use_cts_prot)
1169 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1170 else
1171 ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1172 if (ret < 0) {
1173 wl1251_warning("Set ctsprotect failed %d", ret);
1174 goto out_sleep;
1175 }
1176 }
1177
1178 if (changed & BSS_CHANGED_ARP_FILTER) {
1179 __be32 addr = bss_conf->arp_addr_list[0];
1180 WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1181
1182 enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
1183 ret = wl1251_acx_arp_ip_filter(wl, enable, addr);
1184 if (ret < 0)
1185 goto out_sleep;
1186 }
1187
1188 if (changed & BSS_CHANGED_BEACON) {
1189 beacon = ieee80211_beacon_get(hw, vif);
1190 if (!beacon)
1191 goto out_sleep;
1192
1193 ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1194 beacon->len);
1195
1196 if (ret < 0) {
1197 dev_kfree_skb(beacon);
1198 goto out_sleep;
1199 }
1200
1201 ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1202 beacon->len);
1203
1204 dev_kfree_skb(beacon);
1205
1206 if (ret < 0)
1207 goto out_sleep;
1208
1209 ret = wl1251_join(wl, wl->bss_type, wl->channel,
1210 wl->beacon_int, wl->dtim_period);
1211
1212 if (ret < 0)
1213 goto out_sleep;
1214 }
1215
1216 out_sleep:
1217 wl1251_ps_elp_sleep(wl);
1218
1219 out:
1220 mutex_unlock(&wl->mutex);
1221 }
1222
1223
1224 /* can't be const, mac80211 writes to this */
1225 static struct ieee80211_rate wl1251_rates[] = {
1226 { .bitrate = 10,
1227 .hw_value = 0x1,
1228 .hw_value_short = 0x1, },
1229 { .bitrate = 20,
1230 .hw_value = 0x2,
1231 .hw_value_short = 0x2,
1232 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1233 { .bitrate = 55,
1234 .hw_value = 0x4,
1235 .hw_value_short = 0x4,
1236 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1237 { .bitrate = 110,
1238 .hw_value = 0x20,
1239 .hw_value_short = 0x20,
1240 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1241 { .bitrate = 60,
1242 .hw_value = 0x8,
1243 .hw_value_short = 0x8, },
1244 { .bitrate = 90,
1245 .hw_value = 0x10,
1246 .hw_value_short = 0x10, },
1247 { .bitrate = 120,
1248 .hw_value = 0x40,
1249 .hw_value_short = 0x40, },
1250 { .bitrate = 180,
1251 .hw_value = 0x80,
1252 .hw_value_short = 0x80, },
1253 { .bitrate = 240,
1254 .hw_value = 0x200,
1255 .hw_value_short = 0x200, },
1256 { .bitrate = 360,
1257 .hw_value = 0x400,
1258 .hw_value_short = 0x400, },
1259 { .bitrate = 480,
1260 .hw_value = 0x800,
1261 .hw_value_short = 0x800, },
1262 { .bitrate = 540,
1263 .hw_value = 0x1000,
1264 .hw_value_short = 0x1000, },
1265 };
1266
1267 /* can't be const, mac80211 writes to this */
1268 static struct ieee80211_channel wl1251_channels[] = {
1269 { .hw_value = 1, .center_freq = 2412},
1270 { .hw_value = 2, .center_freq = 2417},
1271 { .hw_value = 3, .center_freq = 2422},
1272 { .hw_value = 4, .center_freq = 2427},
1273 { .hw_value = 5, .center_freq = 2432},
1274 { .hw_value = 6, .center_freq = 2437},
1275 { .hw_value = 7, .center_freq = 2442},
1276 { .hw_value = 8, .center_freq = 2447},
1277 { .hw_value = 9, .center_freq = 2452},
1278 { .hw_value = 10, .center_freq = 2457},
1279 { .hw_value = 11, .center_freq = 2462},
1280 { .hw_value = 12, .center_freq = 2467},
1281 { .hw_value = 13, .center_freq = 2472},
1282 };
1283
1284 static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1285 struct ieee80211_vif *vif, u16 queue,
1286 const struct ieee80211_tx_queue_params *params)
1287 {
1288 enum wl1251_acx_ps_scheme ps_scheme;
1289 struct wl1251 *wl = hw->priv;
1290 int ret;
1291
1292 mutex_lock(&wl->mutex);
1293
1294 wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1295
1296 ret = wl1251_ps_elp_wakeup(wl);
1297 if (ret < 0)
1298 goto out;
1299
1300 /* mac80211 uses units of 32 usec */
1301 ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1302 params->cw_min, params->cw_max,
1303 params->aifs, params->txop * 32);
1304 if (ret < 0)
1305 goto out_sleep;
1306
1307 if (params->uapsd)
1308 ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1309 else
1310 ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1311
1312 ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1313 CHANNEL_TYPE_EDCF,
1314 wl1251_tx_get_queue(queue), ps_scheme,
1315 WL1251_ACX_ACK_POLICY_LEGACY);
1316 if (ret < 0)
1317 goto out_sleep;
1318
1319 out_sleep:
1320 wl1251_ps_elp_sleep(wl);
1321
1322 out:
1323 mutex_unlock(&wl->mutex);
1324
1325 return ret;
1326 }
1327
1328 static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1329 struct survey_info *survey)
1330 {
1331 struct wl1251 *wl = hw->priv;
1332 struct ieee80211_conf *conf = &hw->conf;
1333
1334 if (idx != 0)
1335 return -ENOENT;
1336
1337 survey->channel = conf->chandef.chan;
1338 survey->filled = SURVEY_INFO_NOISE_DBM;
1339 survey->noise = wl->noise;
1340
1341 return 0;
1342 }
1343
1344 /* can't be const, mac80211 writes to this */
1345 static struct ieee80211_supported_band wl1251_band_2ghz = {
1346 .channels = wl1251_channels,
1347 .n_channels = ARRAY_SIZE(wl1251_channels),
1348 .bitrates = wl1251_rates,
1349 .n_bitrates = ARRAY_SIZE(wl1251_rates),
1350 };
1351
1352 static const struct ieee80211_ops wl1251_ops = {
1353 .start = wl1251_op_start,
1354 .stop = wl1251_op_stop,
1355 .add_interface = wl1251_op_add_interface,
1356 .remove_interface = wl1251_op_remove_interface,
1357 .config = wl1251_op_config,
1358 .prepare_multicast = wl1251_op_prepare_multicast,
1359 .configure_filter = wl1251_op_configure_filter,
1360 .tx = wl1251_op_tx,
1361 .set_key = wl1251_op_set_key,
1362 .hw_scan = wl1251_op_hw_scan,
1363 .bss_info_changed = wl1251_op_bss_info_changed,
1364 .set_rts_threshold = wl1251_op_set_rts_threshold,
1365 .conf_tx = wl1251_op_conf_tx,
1366 .get_survey = wl1251_op_get_survey,
1367 };
1368
1369 static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1370 {
1371 unsigned long timeout;
1372
1373 wl1251_reg_write32(wl, EE_ADDR, offset);
1374 wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1375
1376 /* EE_CTL_READ clears when data is ready */
1377 timeout = jiffies + msecs_to_jiffies(100);
1378 while (1) {
1379 if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1380 break;
1381
1382 if (time_after(jiffies, timeout))
1383 return -ETIMEDOUT;
1384
1385 msleep(1);
1386 }
1387
1388 *data = wl1251_reg_read32(wl, EE_DATA);
1389 return 0;
1390 }
1391
1392 static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1393 u8 *data, size_t len)
1394 {
1395 size_t i;
1396 int ret;
1397
1398 wl1251_reg_write32(wl, EE_START, 0);
1399
1400 for (i = 0; i < len; i++) {
1401 ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1402 if (ret < 0)
1403 return ret;
1404 }
1405
1406 return 0;
1407 }
1408
1409 static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1410 {
1411 u8 mac[ETH_ALEN];
1412 int i, ret;
1413
1414 wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1415
1416 ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1417 if (ret < 0) {
1418 wl1251_warning("failed to read MAC address from EEPROM");
1419 return ret;
1420 }
1421
1422 /* MAC is stored in reverse order */
1423 for (i = 0; i < ETH_ALEN; i++)
1424 wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1425
1426 return 0;
1427 }
1428
1429 #define NVS_OFF_MAC_LEN 0x19
1430 #define NVS_OFF_MAC_ADDR_LO 0x1a
1431 #define NVS_OFF_MAC_ADDR_HI 0x1b
1432 #define NVS_OFF_MAC_DATA 0x1c
1433
1434 static int wl1251_check_nvs_mac(struct wl1251 *wl)
1435 {
1436 if (wl->nvs_len < 0x24)
1437 return -ENODATA;
1438
1439 /* length is 2 and data address is 0x546c (ANDed with 0xfffe) */
1440 if (wl->nvs[NVS_OFF_MAC_LEN] != 2 ||
1441 wl->nvs[NVS_OFF_MAC_ADDR_LO] != 0x6d ||
1442 wl->nvs[NVS_OFF_MAC_ADDR_HI] != 0x54)
1443 return -EINVAL;
1444
1445 return 0;
1446 }
1447
1448 static int wl1251_read_nvs_mac(struct wl1251 *wl)
1449 {
1450 u8 mac[ETH_ALEN];
1451 int i, ret;
1452
1453 ret = wl1251_check_nvs_mac(wl);
1454 if (ret)
1455 return ret;
1456
1457 /* MAC is stored in reverse order */
1458 for (i = 0; i < ETH_ALEN; i++)
1459 mac[i] = wl->nvs[NVS_OFF_MAC_DATA + ETH_ALEN - i - 1];
1460
1461 /* 00:00:20:07:03:09 is in example file wl1251-nvs.bin, so invalid */
1462 if (ether_addr_equal_unaligned(mac, "\x00\x00\x20\x07\x03\x09"))
1463 return -EINVAL;
1464
1465 memcpy(wl->mac_addr, mac, ETH_ALEN);
1466 return 0;
1467 }
1468
1469 static int wl1251_write_nvs_mac(struct wl1251 *wl)
1470 {
1471 int i, ret;
1472
1473 ret = wl1251_check_nvs_mac(wl);
1474 if (ret)
1475 return ret;
1476
1477 /* MAC is stored in reverse order */
1478 for (i = 0; i < ETH_ALEN; i++)
1479 wl->nvs[NVS_OFF_MAC_DATA + i] = wl->mac_addr[ETH_ALEN - i - 1];
1480
1481 return 0;
1482 }
1483
1484 static int wl1251_register_hw(struct wl1251 *wl)
1485 {
1486 int ret;
1487
1488 if (wl->mac80211_registered)
1489 return 0;
1490
1491 SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1492
1493 ret = ieee80211_register_hw(wl->hw);
1494 if (ret < 0) {
1495 wl1251_error("unable to register mac80211 hw: %d", ret);
1496 return ret;
1497 }
1498
1499 wl->mac80211_registered = true;
1500
1501 wl1251_notice("loaded");
1502
1503 return 0;
1504 }
1505
1506 int wl1251_init_ieee80211(struct wl1251 *wl)
1507 {
1508 int ret;
1509
1510 /* The tx descriptor buffer and the TKIP space */
1511 wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1512 + WL1251_TKIP_IV_SPACE;
1513
1514 /* unit us */
1515 /* FIXME: find a proper value */
1516
1517 ieee80211_hw_set(wl->hw, SIGNAL_DBM);
1518 ieee80211_hw_set(wl->hw, SUPPORTS_PS);
1519
1520 wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1521 BIT(NL80211_IFTYPE_ADHOC);
1522 wl->hw->wiphy->max_scan_ssids = 1;
1523 wl->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wl1251_band_2ghz;
1524
1525 wl->hw->queues = 4;
1526
1527 if (wl->nvs == NULL && !wl->use_eeprom) {
1528 ret = wl1251_fetch_nvs(wl);
1529 if (ret < 0)
1530 goto out;
1531 }
1532
1533 if (wl->use_eeprom)
1534 ret = wl1251_read_eeprom_mac(wl);
1535 else
1536 ret = wl1251_read_nvs_mac(wl);
1537
1538 if (ret == 0 && !is_valid_ether_addr(wl->mac_addr))
1539 ret = -EINVAL;
1540
1541 if (ret < 0) {
1542 /*
1543 * In case our MAC address is not correctly set,
1544 * we use a random but Nokia MAC.
1545 */
1546 static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1547 memcpy(wl->mac_addr, nokia_oui, 3);
1548 get_random_bytes(wl->mac_addr + 3, 3);
1549 if (!wl->use_eeprom)
1550 wl1251_write_nvs_mac(wl);
1551 wl1251_warning("MAC address in eeprom or nvs data is not valid");
1552 wl1251_warning("Setting random MAC address: %pM", wl->mac_addr);
1553 }
1554
1555 ret = wl1251_register_hw(wl);
1556 if (ret)
1557 goto out;
1558
1559 wl1251_debugfs_init(wl);
1560 wl1251_notice("initialized");
1561
1562 ret = 0;
1563
1564 out:
1565 return ret;
1566 }
1567 EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1568
1569 struct ieee80211_hw *wl1251_alloc_hw(void)
1570 {
1571 struct ieee80211_hw *hw;
1572 struct wl1251 *wl;
1573 int i;
1574
1575 hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1576 if (!hw) {
1577 wl1251_error("could not alloc ieee80211_hw");
1578 return ERR_PTR(-ENOMEM);
1579 }
1580
1581 wl = hw->priv;
1582 memset(wl, 0, sizeof(*wl));
1583
1584 wl->hw = hw;
1585
1586 wl->data_in_count = 0;
1587
1588 skb_queue_head_init(&wl->tx_queue);
1589
1590 INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1591 wl->channel = WL1251_DEFAULT_CHANNEL;
1592 wl->monitor_present = false;
1593 wl->joined = false;
1594 wl->scanning = false;
1595 wl->bss_type = MAX_BSS_TYPE;
1596 wl->default_key = 0;
1597 wl->listen_int = 1;
1598 wl->rx_counter = 0;
1599 wl->rx_handled = 0;
1600 wl->rx_current_buffer = 0;
1601 wl->rx_last_id = 0;
1602 wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1603 wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1604 wl->elp = false;
1605 wl->station_mode = STATION_ACTIVE_MODE;
1606 wl->psm_requested = false;
1607 wl->psm_entry_retry = 0;
1608 wl->tx_queue_stopped = false;
1609 wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1610 wl->rssi_thold = 0;
1611 wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1612 wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1613 wl->vif = NULL;
1614
1615 for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1616 wl->tx_frames[i] = NULL;
1617
1618 wl->next_tx_complete = 0;
1619
1620 INIT_WORK(&wl->irq_work, wl1251_irq_work);
1621 INIT_WORK(&wl->tx_work, wl1251_tx_work);
1622
1623 wl->state = WL1251_STATE_OFF;
1624 mutex_init(&wl->mutex);
1625 spin_lock_init(&wl->wl_lock);
1626
1627 wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1628 wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1629
1630 wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1631 if (!wl->rx_descriptor) {
1632 wl1251_error("could not allocate memory for rx descriptor");
1633 ieee80211_free_hw(hw);
1634 return ERR_PTR(-ENOMEM);
1635 }
1636
1637 return hw;
1638 }
1639 EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1640
1641 int wl1251_free_hw(struct wl1251 *wl)
1642 {
1643 ieee80211_unregister_hw(wl->hw);
1644
1645 wl1251_debugfs_exit(wl);
1646
1647 kfree(wl->target_mem_map);
1648 kfree(wl->data_path);
1649 vfree(wl->fw);
1650 wl->fw = NULL;
1651 kfree(wl->nvs);
1652 wl->nvs = NULL;
1653
1654 kfree(wl->rx_descriptor);
1655 wl->rx_descriptor = NULL;
1656
1657 ieee80211_free_hw(wl->hw);
1658
1659 return 0;
1660 }
1661 EXPORT_SYMBOL_GPL(wl1251_free_hw);
1662
1663 MODULE_DESCRIPTION("TI wl1251 Wireless LAN Driver Core");
1664 MODULE_LICENSE("GPL");
1665 MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1666 MODULE_FIRMWARE(WL1251_FW_NAME);
1667 MODULE_FIRMWARE(WL1251_NVS_NAME);
Linux with added FPC-III support