1 /*
2 * Copyright (c) 2010 Broadcom Corporation
3 * Copyright (c) 2013 Hauke Mehrtens <hauke@hauke-m.de>
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
12 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
14 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
15 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #define __UNDEF_NO_VERSION__
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21 #include <linux/etherdevice.h>
22 #include <linux/sched.h>
23 #include <linux/firmware.h>
24 #include <linux/interrupt.h>
25 #include <linux/module.h>
26 #include <linux/bcma/bcma.h>
27 #include <net/mac80211.h>
28 #include <defs.h>
29 #include "phy/phy_int.h"
30 #include "d11.h"
31 #include "channel.h"
32 #include "scb.h"
33 #include "pub.h"
34 #include "ucode_loader.h"
35 #include "mac80211_if.h"
36 #include "main.h"
37 #include "debug.h"
38 #include "led.h"
39
40 #define N_TX_QUEUES 4 /* #tx queues on mac80211<->driver interface */
41 #define BRCMS_FLUSH_TIMEOUT 500 /* msec */
42
43 /* Flags we support */
44 #define MAC_FILTERS (FIF_ALLMULTI | \
45 FIF_FCSFAIL | \
46 FIF_CONTROL | \
47 FIF_OTHER_BSS | \
48 FIF_BCN_PRBRESP_PROMISC | \
49 FIF_PSPOLL)
50
51 #define CHAN2GHZ(channel, freqency, chflags) { \
52 .band = NL80211_BAND_2GHZ, \
53 .center_freq = (freqency), \
54 .hw_value = (channel), \
55 .flags = chflags, \
56 .max_antenna_gain = 0, \
57 .max_power = 19, \
58 }
59
60 #define CHAN5GHZ(channel, chflags) { \
61 .band = NL80211_BAND_5GHZ, \
62 .center_freq = 5000 + 5*(channel), \
63 .hw_value = (channel), \
64 .flags = chflags, \
65 .max_antenna_gain = 0, \
66 .max_power = 21, \
67 }
68
69 #define RATE(rate100m, _flags) { \
70 .bitrate = (rate100m), \
71 .flags = (_flags), \
72 .hw_value = (rate100m / 5), \
73 }
74
75 struct firmware_hdr {
76 __le32 offset;
77 __le32 len;
78 __le32 idx;
79 };
80
81 static const char * const brcms_firmwares[MAX_FW_IMAGES] = {
82 "brcm/bcm43xx",
83 NULL
84 };
85
86 static int n_adapters_found;
87
88 MODULE_AUTHOR("Broadcom Corporation");
89 MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN driver.");
90 MODULE_LICENSE("Dual BSD/GPL");
91 /* This needs to be adjusted when brcms_firmwares changes */
92 MODULE_FIRMWARE("brcm/bcm43xx-0.fw");
93 MODULE_FIRMWARE("brcm/bcm43xx_hdr-0.fw");
94
95 /* recognized BCMA Core IDs */
96 static struct bcma_device_id brcms_coreid_table[] = {
97 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 17, BCMA_ANY_CLASS),
98 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 23, BCMA_ANY_CLASS),
99 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 24, BCMA_ANY_CLASS),
100 {},
101 };
102 MODULE_DEVICE_TABLE(bcma, brcms_coreid_table);
103
104 #if defined(CONFIG_BRCMDBG)
105 /*
106 * Module parameter for setting the debug message level. Available
107 * flags are specified by the BRCM_DL_* macros in
108 * drivers/net/wireless/brcm80211/include/defs.h.
109 */
110 module_param_named(debug, brcm_msg_level, uint, 0644);
111 #endif
112
113 static struct ieee80211_channel brcms_2ghz_chantable[] = {
114 CHAN2GHZ(1, 2412, IEEE80211_CHAN_NO_HT40MINUS),
115 CHAN2GHZ(2, 2417, IEEE80211_CHAN_NO_HT40MINUS),
116 CHAN2GHZ(3, 2422, IEEE80211_CHAN_NO_HT40MINUS),
117 CHAN2GHZ(4, 2427, IEEE80211_CHAN_NO_HT40MINUS),
118 CHAN2GHZ(5, 2432, 0),
119 CHAN2GHZ(6, 2437, 0),
120 CHAN2GHZ(7, 2442, 0),
121 CHAN2GHZ(8, 2447, IEEE80211_CHAN_NO_HT40PLUS),
122 CHAN2GHZ(9, 2452, IEEE80211_CHAN_NO_HT40PLUS),
123 CHAN2GHZ(10, 2457, IEEE80211_CHAN_NO_HT40PLUS),
124 CHAN2GHZ(11, 2462, IEEE80211_CHAN_NO_HT40PLUS),
125 CHAN2GHZ(12, 2467,
126 IEEE80211_CHAN_NO_IR |
127 IEEE80211_CHAN_NO_HT40PLUS),
128 CHAN2GHZ(13, 2472,
129 IEEE80211_CHAN_NO_IR |
130 IEEE80211_CHAN_NO_HT40PLUS),
131 CHAN2GHZ(14, 2484,
132 IEEE80211_CHAN_NO_IR |
133 IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS |
134 IEEE80211_CHAN_NO_OFDM)
135 };
136
137 static struct ieee80211_channel brcms_5ghz_nphy_chantable[] = {
138 /* UNII-1 */
139 CHAN5GHZ(36, IEEE80211_CHAN_NO_HT40MINUS),
140 CHAN5GHZ(40, IEEE80211_CHAN_NO_HT40PLUS),
141 CHAN5GHZ(44, IEEE80211_CHAN_NO_HT40MINUS),
142 CHAN5GHZ(48, IEEE80211_CHAN_NO_HT40PLUS),
143 /* UNII-2 */
144 CHAN5GHZ(52,
145 IEEE80211_CHAN_RADAR |
146 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
147 CHAN5GHZ(56,
148 IEEE80211_CHAN_RADAR |
149 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
150 CHAN5GHZ(60,
151 IEEE80211_CHAN_RADAR |
152 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
153 CHAN5GHZ(64,
154 IEEE80211_CHAN_RADAR |
155 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
156 /* MID */
157 CHAN5GHZ(100,
158 IEEE80211_CHAN_RADAR |
159 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
160 CHAN5GHZ(104,
161 IEEE80211_CHAN_RADAR |
162 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
163 CHAN5GHZ(108,
164 IEEE80211_CHAN_RADAR |
165 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
166 CHAN5GHZ(112,
167 IEEE80211_CHAN_RADAR |
168 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
169 CHAN5GHZ(116,
170 IEEE80211_CHAN_RADAR |
171 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
172 CHAN5GHZ(120,
173 IEEE80211_CHAN_RADAR |
174 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
175 CHAN5GHZ(124,
176 IEEE80211_CHAN_RADAR |
177 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
178 CHAN5GHZ(128,
179 IEEE80211_CHAN_RADAR |
180 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
181 CHAN5GHZ(132,
182 IEEE80211_CHAN_RADAR |
183 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
184 CHAN5GHZ(136,
185 IEEE80211_CHAN_RADAR |
186 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
187 CHAN5GHZ(140,
188 IEEE80211_CHAN_RADAR |
189 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS |
190 IEEE80211_CHAN_NO_HT40MINUS),
191 /* UNII-3 */
192 CHAN5GHZ(149, IEEE80211_CHAN_NO_HT40MINUS),
193 CHAN5GHZ(153, IEEE80211_CHAN_NO_HT40PLUS),
194 CHAN5GHZ(157, IEEE80211_CHAN_NO_HT40MINUS),
195 CHAN5GHZ(161, IEEE80211_CHAN_NO_HT40PLUS),
196 CHAN5GHZ(165, IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS)
197 };
198
199 /*
200 * The rate table is used for both 2.4G and 5G rates. The
201 * latter being a subset as it does not support CCK rates.
202 */
203 static struct ieee80211_rate legacy_ratetable[] = {
204 RATE(10, 0),
205 RATE(20, IEEE80211_RATE_SHORT_PREAMBLE),
206 RATE(55, IEEE80211_RATE_SHORT_PREAMBLE),
207 RATE(110, IEEE80211_RATE_SHORT_PREAMBLE),
208 RATE(60, 0),
209 RATE(90, 0),
210 RATE(120, 0),
211 RATE(180, 0),
212 RATE(240, 0),
213 RATE(360, 0),
214 RATE(480, 0),
215 RATE(540, 0),
216 };
217
218 static const struct ieee80211_supported_band brcms_band_2GHz_nphy_template = {
219 .band = NL80211_BAND_2GHZ,
220 .channels = brcms_2ghz_chantable,
221 .n_channels = ARRAY_SIZE(brcms_2ghz_chantable),
222 .bitrates = legacy_ratetable,
223 .n_bitrates = ARRAY_SIZE(legacy_ratetable),
224 .ht_cap = {
225 /* from include/linux/ieee80211.h */
226 .cap = IEEE80211_HT_CAP_GRN_FLD |
227 IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_SGI_40,
228 .ht_supported = true,
229 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
230 .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
231 .mcs = {
232 /* placeholders for now */
233 .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
234 .rx_highest = cpu_to_le16(500),
235 .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
236 }
237 };
238
239 static const struct ieee80211_supported_band brcms_band_5GHz_nphy_template = {
240 .band = NL80211_BAND_5GHZ,
241 .channels = brcms_5ghz_nphy_chantable,
242 .n_channels = ARRAY_SIZE(brcms_5ghz_nphy_chantable),
243 .bitrates = legacy_ratetable + BRCMS_LEGACY_5G_RATE_OFFSET,
244 .n_bitrates = ARRAY_SIZE(legacy_ratetable) -
245 BRCMS_LEGACY_5G_RATE_OFFSET,
246 .ht_cap = {
247 .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 |
248 IEEE80211_HT_CAP_SGI_40,
249 .ht_supported = true,
250 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
251 .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
252 .mcs = {
253 /* placeholders for now */
254 .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
255 .rx_highest = cpu_to_le16(500),
256 .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
257 }
258 };
259
260 /* flags the given rate in rateset as requested */
brcms_set_basic_rate(struct brcm_rateset * rs,u16 rate,bool is_br)261 static void brcms_set_basic_rate(struct brcm_rateset *rs, u16 rate, bool is_br)
262 {
263 u32 i;
264
265 for (i = 0; i < rs->count; i++) {
266 if (rate != (rs->rates[i] & 0x7f))
267 continue;
268
269 if (is_br)
270 rs->rates[i] |= BRCMS_RATE_FLAG;
271 else
272 rs->rates[i] &= BRCMS_RATE_MASK;
273 return;
274 }
275 }
276
277 /*
278 * This function frees the WL per-device resources.
279 *
280 * This function frees resources owned by the WL device pointed to
281 * by the wl parameter.
282 *
283 * precondition: can both be called locked and unlocked
284 */
brcms_free(struct brcms_info * wl)285 static void brcms_free(struct brcms_info *wl)
286 {
287 struct brcms_timer *t, *next;
288
289 /* free ucode data */
290 if (wl->fw.fw_cnt)
291 brcms_ucode_data_free(&wl->ucode);
292 if (wl->irq)
293 free_irq(wl->irq, wl);
294
295 /* kill dpc */
296 tasklet_kill(&wl->tasklet);
297
298 if (wl->pub) {
299 brcms_debugfs_detach(wl->pub);
300 brcms_c_module_unregister(wl->pub, "linux", wl);
301 }
302
303 /* free common resources */
304 if (wl->wlc) {
305 brcms_c_detach(wl->wlc);
306 wl->wlc = NULL;
307 wl->pub = NULL;
308 }
309
310 /* virtual interface deletion is deferred so we cannot spinwait */
311
312 /* wait for all pending callbacks to complete */
313 while (atomic_read(&wl->callbacks) > 0)
314 schedule();
315
316 /* free timers */
317 for (t = wl->timers; t; t = next) {
318 next = t->next;
319 #ifdef DEBUG
320 kfree(t->name);
321 #endif
322 kfree(t);
323 }
324 }
325
326 /*
327 * called from both kernel as from this kernel module (error flow on attach)
328 * precondition: perimeter lock is not acquired.
329 */
brcms_remove(struct bcma_device * pdev)330 static void brcms_remove(struct bcma_device *pdev)
331 {
332 struct ieee80211_hw *hw = bcma_get_drvdata(pdev);
333 struct brcms_info *wl = hw->priv;
334
335 if (wl->wlc) {
336 brcms_led_unregister(wl);
337 wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, false);
338 wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
339 ieee80211_unregister_hw(hw);
340 }
341
342 brcms_free(wl);
343
344 bcma_set_drvdata(pdev, NULL);
345 ieee80211_free_hw(hw);
346 }
347
348 /*
349 * Precondition: Since this function is called in brcms_pci_probe() context,
350 * no locking is required.
351 */
brcms_release_fw(struct brcms_info * wl)352 static void brcms_release_fw(struct brcms_info *wl)
353 {
354 int i;
355 for (i = 0; i < MAX_FW_IMAGES; i++) {
356 release_firmware(wl->fw.fw_bin[i]);
357 release_firmware(wl->fw.fw_hdr[i]);
358 }
359 }
360
361 /*
362 * Precondition: Since this function is called in brcms_pci_probe() context,
363 * no locking is required.
364 */
brcms_request_fw(struct brcms_info * wl,struct bcma_device * pdev)365 static int brcms_request_fw(struct brcms_info *wl, struct bcma_device *pdev)
366 {
367 int status;
368 struct device *device = &pdev->dev;
369 char fw_name[100];
370 int i;
371
372 memset(&wl->fw, 0, sizeof(struct brcms_firmware));
373 for (i = 0; i < MAX_FW_IMAGES; i++) {
374 if (brcms_firmwares[i] == NULL)
375 break;
376 sprintf(fw_name, "%s-%d.fw", brcms_firmwares[i],
377 UCODE_LOADER_API_VER);
378 status = request_firmware(&wl->fw.fw_bin[i], fw_name, device);
379 if (status) {
380 wiphy_err(wl->wiphy, "%s: fail to load firmware %s\n",
381 KBUILD_MODNAME, fw_name);
382 return status;
383 }
384 sprintf(fw_name, "%s_hdr-%d.fw", brcms_firmwares[i],
385 UCODE_LOADER_API_VER);
386 status = request_firmware(&wl->fw.fw_hdr[i], fw_name, device);
387 if (status) {
388 wiphy_err(wl->wiphy, "%s: fail to load firmware %s\n",
389 KBUILD_MODNAME, fw_name);
390 return status;
391 }
392 wl->fw.hdr_num_entries[i] =
393 wl->fw.fw_hdr[i]->size / (sizeof(struct firmware_hdr));
394 }
395 wl->fw.fw_cnt = i;
396 status = brcms_ucode_data_init(wl, &wl->ucode);
397 brcms_release_fw(wl);
398 return status;
399 }
400
brcms_ops_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)401 static void brcms_ops_tx(struct ieee80211_hw *hw,
402 struct ieee80211_tx_control *control,
403 struct sk_buff *skb)
404 {
405 struct brcms_info *wl = hw->priv;
406 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
407
408 spin_lock_bh(&wl->lock);
409 if (!wl->pub->up) {
410 brcms_err(wl->wlc->hw->d11core, "ops->tx called while down\n");
411 kfree_skb(skb);
412 goto done;
413 }
414 if (brcms_c_sendpkt_mac80211(wl->wlc, skb, hw))
415 tx_info->rate_driver_data[0] = control->sta;
416 done:
417 spin_unlock_bh(&wl->lock);
418 }
419
brcms_ops_start(struct ieee80211_hw * hw)420 static int brcms_ops_start(struct ieee80211_hw *hw)
421 {
422 struct brcms_info *wl = hw->priv;
423 bool blocked;
424 int err;
425
426 if (!wl->ucode.bcm43xx_bomminor) {
427 err = brcms_request_fw(wl, wl->wlc->hw->d11core);
428 if (err)
429 return -ENOENT;
430 }
431
432 ieee80211_wake_queues(hw);
433 spin_lock_bh(&wl->lock);
434 blocked = brcms_rfkill_set_hw_state(wl);
435 spin_unlock_bh(&wl->lock);
436 if (!blocked)
437 wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
438
439 spin_lock_bh(&wl->lock);
440 /* avoid acknowledging frames before a non-monitor device is added */
441 wl->mute_tx = true;
442
443 if (!wl->pub->up)
444 if (!blocked)
445 err = brcms_up(wl);
446 else
447 err = -ERFKILL;
448 else
449 err = -ENODEV;
450 spin_unlock_bh(&wl->lock);
451
452 if (err != 0)
453 brcms_err(wl->wlc->hw->d11core, "%s: brcms_up() returned %d\n",
454 __func__, err);
455
456 bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, true);
457 return err;
458 }
459
brcms_ops_stop(struct ieee80211_hw * hw)460 static void brcms_ops_stop(struct ieee80211_hw *hw)
461 {
462 struct brcms_info *wl = hw->priv;
463 int status;
464
465 ieee80211_stop_queues(hw);
466
467 if (wl->wlc == NULL)
468 return;
469
470 spin_lock_bh(&wl->lock);
471 status = brcms_c_chipmatch(wl->wlc->hw->d11core);
472 spin_unlock_bh(&wl->lock);
473 if (!status) {
474 brcms_err(wl->wlc->hw->d11core,
475 "wl: brcms_ops_stop: chipmatch failed\n");
476 return;
477 }
478
479 bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, false);
480
481 /* put driver in down state */
482 spin_lock_bh(&wl->lock);
483 brcms_down(wl);
484 spin_unlock_bh(&wl->lock);
485 }
486
487 static int
brcms_ops_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)488 brcms_ops_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
489 {
490 struct brcms_info *wl = hw->priv;
491
492 /* Just STA, AP and ADHOC for now */
493 if (vif->type != NL80211_IFTYPE_STATION &&
494 vif->type != NL80211_IFTYPE_AP &&
495 vif->type != NL80211_IFTYPE_ADHOC) {
496 brcms_err(wl->wlc->hw->d11core,
497 "%s: Attempt to add type %d, only STA, AP and AdHoc for now\n",
498 __func__, vif->type);
499 return -EOPNOTSUPP;
500 }
501
502 spin_lock_bh(&wl->lock);
503 wl->wlc->vif = vif;
504 wl->mute_tx = false;
505 brcms_c_mute(wl->wlc, false);
506 if (vif->type == NL80211_IFTYPE_STATION)
507 brcms_c_start_station(wl->wlc, vif->addr);
508 else if (vif->type == NL80211_IFTYPE_AP)
509 brcms_c_start_ap(wl->wlc, vif->addr, vif->bss_conf.bssid,
510 vif->cfg.ssid, vif->cfg.ssid_len);
511 else if (vif->type == NL80211_IFTYPE_ADHOC)
512 brcms_c_start_adhoc(wl->wlc, vif->addr);
513 spin_unlock_bh(&wl->lock);
514
515 return 0;
516 }
517
518 static void
brcms_ops_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)519 brcms_ops_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
520 {
521 struct brcms_info *wl = hw->priv;
522
523 spin_lock_bh(&wl->lock);
524 wl->wlc->vif = NULL;
525 spin_unlock_bh(&wl->lock);
526 }
527
brcms_ops_config(struct ieee80211_hw * hw,u32 changed)528 static int brcms_ops_config(struct ieee80211_hw *hw, u32 changed)
529 {
530 struct ieee80211_conf *conf = &hw->conf;
531 struct brcms_info *wl = hw->priv;
532 struct bcma_device *core = wl->wlc->hw->d11core;
533 int err = 0;
534 int new_int;
535
536 spin_lock_bh(&wl->lock);
537 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
538 brcms_c_set_beacon_listen_interval(wl->wlc,
539 conf->listen_interval);
540 }
541 if (changed & IEEE80211_CONF_CHANGE_MONITOR)
542 brcms_dbg_info(core, "%s: change monitor mode: %s\n",
543 __func__, conf->flags & IEEE80211_CONF_MONITOR ?
544 "true" : "false");
545 if (changed & IEEE80211_CONF_CHANGE_PS)
546 brcms_err(core, "%s: change power-save mode: %s (implement)\n",
547 __func__, conf->flags & IEEE80211_CONF_PS ?
548 "true" : "false");
549
550 if (changed & IEEE80211_CONF_CHANGE_POWER) {
551 err = brcms_c_set_tx_power(wl->wlc, conf->power_level);
552 if (err < 0) {
553 brcms_err(core, "%s: Error setting power_level\n",
554 __func__);
555 goto config_out;
556 }
557 new_int = brcms_c_get_tx_power(wl->wlc);
558 if (new_int != conf->power_level)
559 brcms_err(core,
560 "%s: Power level req != actual, %d %d\n",
561 __func__, conf->power_level,
562 new_int);
563 }
564 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
565 if (conf->chandef.width == NL80211_CHAN_WIDTH_20 ||
566 conf->chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
567 err = brcms_c_set_channel(wl->wlc,
568 conf->chandef.chan->hw_value);
569 else
570 err = -ENOTSUPP;
571 }
572 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
573 err = brcms_c_set_rate_limit(wl->wlc,
574 conf->short_frame_max_tx_count,
575 conf->long_frame_max_tx_count);
576
577 config_out:
578 spin_unlock_bh(&wl->lock);
579 return err;
580 }
581
582 static void
brcms_ops_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u64 changed)583 brcms_ops_bss_info_changed(struct ieee80211_hw *hw,
584 struct ieee80211_vif *vif,
585 struct ieee80211_bss_conf *info, u64 changed)
586 {
587 struct brcms_info *wl = hw->priv;
588 struct bcma_device *core = wl->wlc->hw->d11core;
589
590 if (changed & BSS_CHANGED_ASSOC) {
591 /* association status changed (associated/disassociated)
592 * also implies a change in the AID.
593 */
594 brcms_err(core, "%s: %s: %sassociated\n", KBUILD_MODNAME,
595 __func__, vif->cfg.assoc ? "" : "dis");
596 spin_lock_bh(&wl->lock);
597 brcms_c_associate_upd(wl->wlc, vif->cfg.assoc);
598 spin_unlock_bh(&wl->lock);
599 }
600 if (changed & BSS_CHANGED_ERP_SLOT) {
601 s8 val;
602
603 /* slot timing changed */
604 if (info->use_short_slot)
605 val = 1;
606 else
607 val = 0;
608 spin_lock_bh(&wl->lock);
609 brcms_c_set_shortslot_override(wl->wlc, val);
610 spin_unlock_bh(&wl->lock);
611 }
612
613 if (changed & BSS_CHANGED_HT) {
614 /* 802.11n parameters changed */
615 u16 mode = info->ht_operation_mode;
616
617 spin_lock_bh(&wl->lock);
618 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_CFG,
619 mode & IEEE80211_HT_OP_MODE_PROTECTION);
620 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_NONGF,
621 mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
622 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_OBSS,
623 mode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT);
624 spin_unlock_bh(&wl->lock);
625 }
626 if (changed & BSS_CHANGED_BASIC_RATES) {
627 struct ieee80211_supported_band *bi;
628 u32 br_mask, i;
629 u16 rate;
630 struct brcm_rateset rs;
631 int error;
632
633 /* retrieve the current rates */
634 spin_lock_bh(&wl->lock);
635 brcms_c_get_current_rateset(wl->wlc, &rs);
636 spin_unlock_bh(&wl->lock);
637
638 br_mask = info->basic_rates;
639 bi = hw->wiphy->bands[brcms_c_get_curband(wl->wlc)];
640 for (i = 0; i < bi->n_bitrates; i++) {
641 /* convert to internal rate value */
642 rate = (bi->bitrates[i].bitrate << 1) / 10;
643
644 /* set/clear basic rate flag */
645 brcms_set_basic_rate(&rs, rate, br_mask & 1);
646 br_mask >>= 1;
647 }
648
649 /* update the rate set */
650 spin_lock_bh(&wl->lock);
651 error = brcms_c_set_rateset(wl->wlc, &rs);
652 spin_unlock_bh(&wl->lock);
653 if (error)
654 brcms_err(core, "changing basic rates failed: %d\n",
655 error);
656 }
657 if (changed & BSS_CHANGED_BEACON_INT) {
658 /* Beacon interval changed */
659 spin_lock_bh(&wl->lock);
660 brcms_c_set_beacon_period(wl->wlc, info->beacon_int);
661 spin_unlock_bh(&wl->lock);
662 }
663 if (changed & BSS_CHANGED_BSSID) {
664 /* BSSID changed, for whatever reason (IBSS and managed mode) */
665 spin_lock_bh(&wl->lock);
666 brcms_c_set_addrmatch(wl->wlc, RCM_BSSID_OFFSET, info->bssid);
667 spin_unlock_bh(&wl->lock);
668 }
669 if (changed & BSS_CHANGED_SSID) {
670 /* BSSID changed, for whatever reason (IBSS and managed mode) */
671 spin_lock_bh(&wl->lock);
672 brcms_c_set_ssid(wl->wlc, vif->cfg.ssid, vif->cfg.ssid_len);
673 spin_unlock_bh(&wl->lock);
674 }
675 if (changed & BSS_CHANGED_BEACON) {
676 /* Beacon data changed, retrieve new beacon (beaconing modes) */
677 struct sk_buff *beacon;
678 u16 tim_offset = 0;
679
680 spin_lock_bh(&wl->lock);
681 beacon = ieee80211_beacon_get_tim(hw, vif, &tim_offset, NULL, 0);
682 brcms_c_set_new_beacon(wl->wlc, beacon, tim_offset,
683 info->dtim_period);
684 spin_unlock_bh(&wl->lock);
685 }
686
687 if (changed & BSS_CHANGED_AP_PROBE_RESP) {
688 struct sk_buff *probe_resp;
689
690 spin_lock_bh(&wl->lock);
691 probe_resp = ieee80211_proberesp_get(hw, vif);
692 brcms_c_set_new_probe_resp(wl->wlc, probe_resp);
693 spin_unlock_bh(&wl->lock);
694 }
695
696 if (changed & BSS_CHANGED_BEACON_ENABLED) {
697 /* Beaconing should be enabled/disabled (beaconing modes) */
698 brcms_err(core, "%s: Beacon enabled: %s\n", __func__,
699 info->enable_beacon ? "true" : "false");
700 if (info->enable_beacon &&
701 hw->wiphy->flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) {
702 brcms_c_enable_probe_resp(wl->wlc, true);
703 } else {
704 brcms_c_enable_probe_resp(wl->wlc, false);
705 }
706 }
707
708 if (changed & BSS_CHANGED_CQM) {
709 /* Connection quality monitor config changed */
710 brcms_err(core, "%s: cqm change: threshold %d, hys %d "
711 " (implement)\n", __func__, info->cqm_rssi_thold,
712 info->cqm_rssi_hyst);
713 }
714
715 if (changed & BSS_CHANGED_IBSS) {
716 /* IBSS join status changed */
717 brcms_err(core, "%s: IBSS joined: %s (implement)\n",
718 __func__, vif->cfg.ibss_joined ? "true" : "false");
719 }
720
721 if (changed & BSS_CHANGED_ARP_FILTER) {
722 /* Hardware ARP filter address list or state changed */
723 brcms_err(core, "%s: arp filtering: %d addresses"
724 " (implement)\n", __func__, vif->cfg.arp_addr_cnt);
725 }
726
727 if (changed & BSS_CHANGED_QOS) {
728 /*
729 * QoS for this association was enabled/disabled.
730 * Note that it is only ever disabled for station mode.
731 */
732 brcms_err(core, "%s: qos enabled: %s (implement)\n",
733 __func__, info->qos ? "true" : "false");
734 }
735 return;
736 }
737
738 static void
brcms_ops_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)739 brcms_ops_configure_filter(struct ieee80211_hw *hw,
740 unsigned int changed_flags,
741 unsigned int *total_flags, u64 multicast)
742 {
743 struct brcms_info *wl = hw->priv;
744 struct bcma_device *core = wl->wlc->hw->d11core;
745
746 changed_flags &= MAC_FILTERS;
747 *total_flags &= MAC_FILTERS;
748
749 if (changed_flags & FIF_ALLMULTI)
750 brcms_dbg_info(core, "FIF_ALLMULTI\n");
751 if (changed_flags & FIF_FCSFAIL)
752 brcms_dbg_info(core, "FIF_FCSFAIL\n");
753 if (changed_flags & FIF_CONTROL)
754 brcms_dbg_info(core, "FIF_CONTROL\n");
755 if (changed_flags & FIF_OTHER_BSS)
756 brcms_dbg_info(core, "FIF_OTHER_BSS\n");
757 if (changed_flags & FIF_PSPOLL)
758 brcms_dbg_info(core, "FIF_PSPOLL\n");
759 if (changed_flags & FIF_BCN_PRBRESP_PROMISC)
760 brcms_dbg_info(core, "FIF_BCN_PRBRESP_PROMISC\n");
761
762 spin_lock_bh(&wl->lock);
763 brcms_c_mac_promisc(wl->wlc, *total_flags);
764 spin_unlock_bh(&wl->lock);
765 return;
766 }
767
brcms_ops_sw_scan_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const u8 * mac_addr)768 static void brcms_ops_sw_scan_start(struct ieee80211_hw *hw,
769 struct ieee80211_vif *vif,
770 const u8 *mac_addr)
771 {
772 struct brcms_info *wl = hw->priv;
773 spin_lock_bh(&wl->lock);
774 brcms_c_scan_start(wl->wlc);
775 spin_unlock_bh(&wl->lock);
776 return;
777 }
778
brcms_ops_sw_scan_complete(struct ieee80211_hw * hw,struct ieee80211_vif * vif)779 static void brcms_ops_sw_scan_complete(struct ieee80211_hw *hw,
780 struct ieee80211_vif *vif)
781 {
782 struct brcms_info *wl = hw->priv;
783 spin_lock_bh(&wl->lock);
784 brcms_c_scan_stop(wl->wlc);
785 spin_unlock_bh(&wl->lock);
786 return;
787 }
788
789 static int
brcms_ops_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,unsigned int link_id,u16 queue,const struct ieee80211_tx_queue_params * params)790 brcms_ops_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
791 unsigned int link_id, u16 queue,
792 const struct ieee80211_tx_queue_params *params)
793 {
794 struct brcms_info *wl = hw->priv;
795
796 spin_lock_bh(&wl->lock);
797 brcms_c_wme_setparams(wl->wlc, queue, params, true);
798 spin_unlock_bh(&wl->lock);
799
800 return 0;
801 }
802
803 static int
brcms_ops_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)804 brcms_ops_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
805 struct ieee80211_sta *sta)
806 {
807 struct brcms_info *wl = hw->priv;
808 struct scb *scb = &wl->wlc->pri_scb;
809
810 brcms_c_init_scb(scb);
811
812 wl->pub->global_ampdu = &(scb->scb_ampdu);
813 wl->pub->global_ampdu->max_pdu = 16;
814
815 /*
816 * minstrel_ht initiates addBA on our behalf by calling
817 * ieee80211_start_tx_ba_session()
818 */
819 return 0;
820 }
821
822 static int
brcms_ops_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)823 brcms_ops_ampdu_action(struct ieee80211_hw *hw,
824 struct ieee80211_vif *vif,
825 struct ieee80211_ampdu_params *params)
826 {
827 struct brcms_info *wl = hw->priv;
828 struct scb *scb = &wl->wlc->pri_scb;
829 int status;
830 struct ieee80211_sta *sta = params->sta;
831 enum ieee80211_ampdu_mlme_action action = params->action;
832 u16 tid = params->tid;
833
834 if (WARN_ON(scb->magic != SCB_MAGIC))
835 return -EIDRM;
836 switch (action) {
837 case IEEE80211_AMPDU_RX_START:
838 break;
839 case IEEE80211_AMPDU_RX_STOP:
840 break;
841 case IEEE80211_AMPDU_TX_START:
842 spin_lock_bh(&wl->lock);
843 status = brcms_c_aggregatable(wl->wlc, tid);
844 spin_unlock_bh(&wl->lock);
845 if (!status) {
846 brcms_dbg_ht(wl->wlc->hw->d11core,
847 "START: tid %d is not agg\'able\n", tid);
848 return -EINVAL;
849 }
850 return IEEE80211_AMPDU_TX_START_IMMEDIATE;
851
852 case IEEE80211_AMPDU_TX_STOP_CONT:
853 case IEEE80211_AMPDU_TX_STOP_FLUSH:
854 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
855 spin_lock_bh(&wl->lock);
856 brcms_c_ampdu_flush(wl->wlc, sta, tid);
857 spin_unlock_bh(&wl->lock);
858 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
859 break;
860 case IEEE80211_AMPDU_TX_OPERATIONAL:
861 /*
862 * BA window size from ADDBA response ('buf_size') defines how
863 * many outstanding MPDUs are allowed for the BA stream by
864 * recipient and traffic class (this is actually unused by the
865 * rest of the driver). 'ampdu_factor' gives maximum AMPDU size.
866 */
867 spin_lock_bh(&wl->lock);
868 brcms_c_ampdu_tx_operational(wl->wlc, tid,
869 (1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
870 sta->deflink.ht_cap.ampdu_factor)) - 1);
871 spin_unlock_bh(&wl->lock);
872 /* Power save wakeup */
873 break;
874 default:
875 brcms_err(wl->wlc->hw->d11core,
876 "%s: Invalid command, ignoring\n", __func__);
877 }
878
879 return 0;
880 }
881
brcms_ops_rfkill_poll(struct ieee80211_hw * hw)882 static void brcms_ops_rfkill_poll(struct ieee80211_hw *hw)
883 {
884 struct brcms_info *wl = hw->priv;
885 bool blocked;
886
887 spin_lock_bh(&wl->lock);
888 blocked = brcms_c_check_radio_disabled(wl->wlc);
889 spin_unlock_bh(&wl->lock);
890
891 wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
892 }
893
brcms_tx_flush_completed(struct brcms_info * wl)894 static bool brcms_tx_flush_completed(struct brcms_info *wl)
895 {
896 bool result;
897
898 spin_lock_bh(&wl->lock);
899 result = brcms_c_tx_flush_completed(wl->wlc);
900 spin_unlock_bh(&wl->lock);
901 return result;
902 }
903
brcms_ops_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)904 static void brcms_ops_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
905 u32 queues, bool drop)
906 {
907 struct brcms_info *wl = hw->priv;
908 int ret;
909
910 no_printk("%s: drop = %s\n", __func__, drop ? "true" : "false");
911
912 ret = wait_event_timeout(wl->tx_flush_wq,
913 brcms_tx_flush_completed(wl),
914 msecs_to_jiffies(BRCMS_FLUSH_TIMEOUT));
915
916 brcms_dbg_mac80211(wl->wlc->hw->d11core,
917 "ret=%d\n", jiffies_to_msecs(ret));
918 }
919
brcms_ops_get_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif)920 static u64 brcms_ops_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
921 {
922 struct brcms_info *wl = hw->priv;
923 u64 tsf;
924
925 spin_lock_bh(&wl->lock);
926 tsf = brcms_c_tsf_get(wl->wlc);
927 spin_unlock_bh(&wl->lock);
928
929 return tsf;
930 }
931
brcms_ops_set_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u64 tsf)932 static void brcms_ops_set_tsf(struct ieee80211_hw *hw,
933 struct ieee80211_vif *vif, u64 tsf)
934 {
935 struct brcms_info *wl = hw->priv;
936
937 spin_lock_bh(&wl->lock);
938 brcms_c_tsf_set(wl->wlc, tsf);
939 spin_unlock_bh(&wl->lock);
940 }
941
brcms_ops_beacon_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)942 static int brcms_ops_beacon_set_tim(struct ieee80211_hw *hw,
943 struct ieee80211_sta *sta, bool set)
944 {
945 struct brcms_info *wl = hw->priv;
946 struct sk_buff *beacon = NULL;
947 u16 tim_offset = 0;
948
949 spin_lock_bh(&wl->lock);
950 if (wl->wlc->vif)
951 beacon = ieee80211_beacon_get_tim(hw, wl->wlc->vif,
952 &tim_offset, NULL, 0);
953 if (beacon)
954 brcms_c_set_new_beacon(wl->wlc, beacon, tim_offset,
955 wl->wlc->vif->bss_conf.dtim_period);
956 spin_unlock_bh(&wl->lock);
957
958 return 0;
959 }
960
961 static const struct ieee80211_ops brcms_ops = {
962 .tx = brcms_ops_tx,
963 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
964 .start = brcms_ops_start,
965 .stop = brcms_ops_stop,
966 .add_interface = brcms_ops_add_interface,
967 .remove_interface = brcms_ops_remove_interface,
968 .config = brcms_ops_config,
969 .bss_info_changed = brcms_ops_bss_info_changed,
970 .configure_filter = brcms_ops_configure_filter,
971 .sw_scan_start = brcms_ops_sw_scan_start,
972 .sw_scan_complete = brcms_ops_sw_scan_complete,
973 .conf_tx = brcms_ops_conf_tx,
974 .sta_add = brcms_ops_sta_add,
975 .ampdu_action = brcms_ops_ampdu_action,
976 .rfkill_poll = brcms_ops_rfkill_poll,
977 .flush = brcms_ops_flush,
978 .get_tsf = brcms_ops_get_tsf,
979 .set_tsf = brcms_ops_set_tsf,
980 .set_tim = brcms_ops_beacon_set_tim,
981 };
982
brcms_dpc(struct tasklet_struct * t)983 void brcms_dpc(struct tasklet_struct *t)
984 {
985 struct brcms_info *wl;
986
987 wl = from_tasklet(wl, t, tasklet);
988
989 spin_lock_bh(&wl->lock);
990
991 /* call the common second level interrupt handler */
992 if (wl->pub->up) {
993 if (wl->resched) {
994 unsigned long flags;
995
996 spin_lock_irqsave(&wl->isr_lock, flags);
997 brcms_c_intrsupd(wl->wlc);
998 spin_unlock_irqrestore(&wl->isr_lock, flags);
999 }
1000
1001 wl->resched = brcms_c_dpc(wl->wlc, true);
1002 }
1003
1004 /* brcms_c_dpc() may bring the driver down */
1005 if (!wl->pub->up)
1006 goto done;
1007
1008 /* re-schedule dpc */
1009 if (wl->resched)
1010 tasklet_schedule(&wl->tasklet);
1011 else
1012 /* re-enable interrupts */
1013 brcms_intrson(wl);
1014
1015 done:
1016 spin_unlock_bh(&wl->lock);
1017 wake_up(&wl->tx_flush_wq);
1018 }
1019
brcms_isr(int irq,void * dev_id)1020 static irqreturn_t brcms_isr(int irq, void *dev_id)
1021 {
1022 struct brcms_info *wl;
1023 irqreturn_t ret = IRQ_NONE;
1024
1025 wl = (struct brcms_info *) dev_id;
1026
1027 spin_lock(&wl->isr_lock);
1028
1029 /* call common first level interrupt handler */
1030 if (brcms_c_isr(wl->wlc)) {
1031 /* schedule second level handler */
1032 tasklet_schedule(&wl->tasklet);
1033 ret = IRQ_HANDLED;
1034 }
1035
1036 spin_unlock(&wl->isr_lock);
1037
1038 return ret;
1039 }
1040
1041 /*
1042 * is called in brcms_pci_probe() context, therefore no locking required.
1043 */
ieee_hw_rate_init(struct ieee80211_hw * hw)1044 static int ieee_hw_rate_init(struct ieee80211_hw *hw)
1045 {
1046 struct brcms_info *wl = hw->priv;
1047 struct brcms_c_info *wlc = wl->wlc;
1048 struct ieee80211_supported_band *band;
1049 u16 phy_type;
1050
1051 hw->wiphy->bands[NL80211_BAND_2GHZ] = NULL;
1052 hw->wiphy->bands[NL80211_BAND_5GHZ] = NULL;
1053
1054 phy_type = brcms_c_get_phy_type(wl->wlc, 0);
1055 if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
1056 band = &wlc->bandstate[BAND_2G_INDEX]->band;
1057 *band = brcms_band_2GHz_nphy_template;
1058 if (phy_type == PHY_TYPE_LCN) {
1059 /* Single stream */
1060 band->ht_cap.mcs.rx_mask[1] = 0;
1061 band->ht_cap.mcs.rx_highest = cpu_to_le16(72);
1062 }
1063 hw->wiphy->bands[NL80211_BAND_2GHZ] = band;
1064 } else {
1065 return -EPERM;
1066 }
1067
1068 /* Assume all bands use the same phy. True for 11n devices. */
1069 if (wl->pub->_nbands > 1) {
1070 if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
1071 band = &wlc->bandstate[BAND_5G_INDEX]->band;
1072 *band = brcms_band_5GHz_nphy_template;
1073 hw->wiphy->bands[NL80211_BAND_5GHZ] = band;
1074 } else {
1075 return -EPERM;
1076 }
1077 }
1078 return 0;
1079 }
1080
1081 /*
1082 * is called in brcms_pci_probe() context, therefore no locking required.
1083 */
ieee_hw_init(struct ieee80211_hw * hw)1084 static int ieee_hw_init(struct ieee80211_hw *hw)
1085 {
1086 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1087 ieee80211_hw_set(hw, SIGNAL_DBM);
1088 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
1089 ieee80211_hw_set(hw, MFP_CAPABLE);
1090
1091 hw->extra_tx_headroom = brcms_c_get_header_len();
1092 hw->queues = N_TX_QUEUES;
1093 hw->max_rates = 2; /* Primary rate and 1 fallback rate */
1094
1095 /* channel change time is dependent on chip and band */
1096 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1097 BIT(NL80211_IFTYPE_AP) |
1098 BIT(NL80211_IFTYPE_ADHOC);
1099
1100 /*
1101 * deactivate sending probe responses by ucude, because this will
1102 * cause problems when WPS is used.
1103 *
1104 * hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
1105 */
1106
1107 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1108
1109 hw->rate_control_algorithm = "minstrel_ht";
1110
1111 hw->sta_data_size = 0;
1112 return ieee_hw_rate_init(hw);
1113 }
1114
1115 /*
1116 * attach to the WL device.
1117 *
1118 * Attach to the WL device identified by vendor and device parameters.
1119 * regs is a host accessible memory address pointing to WL device registers.
1120 *
1121 * is called in brcms_bcma_probe() context, therefore no locking required.
1122 */
brcms_attach(struct bcma_device * pdev)1123 static struct brcms_info *brcms_attach(struct bcma_device *pdev)
1124 {
1125 struct brcms_info *wl = NULL;
1126 int unit, err;
1127 struct ieee80211_hw *hw;
1128 u8 perm[ETH_ALEN];
1129
1130 unit = n_adapters_found;
1131 err = 0;
1132
1133 if (unit < 0)
1134 return NULL;
1135
1136 /* allocate private info */
1137 hw = bcma_get_drvdata(pdev);
1138 if (hw != NULL)
1139 wl = hw->priv;
1140 if (WARN_ON(hw == NULL) || WARN_ON(wl == NULL))
1141 return NULL;
1142 wl->wiphy = hw->wiphy;
1143
1144 atomic_set(&wl->callbacks, 0);
1145
1146 init_waitqueue_head(&wl->tx_flush_wq);
1147
1148 /* setup the bottom half handler */
1149 tasklet_setup(&wl->tasklet, brcms_dpc);
1150
1151 spin_lock_init(&wl->lock);
1152 spin_lock_init(&wl->isr_lock);
1153
1154 /* common load-time initialization */
1155 wl->wlc = brcms_c_attach((void *)wl, pdev, unit, false, &err);
1156 if (!wl->wlc) {
1157 wiphy_err(wl->wiphy, "%s: attach() failed with code %d\n",
1158 KBUILD_MODNAME, err);
1159 goto fail;
1160 }
1161 wl->pub = brcms_c_pub(wl->wlc);
1162
1163 wl->pub->ieee_hw = hw;
1164
1165 /* register our interrupt handler */
1166 if (request_irq(pdev->irq, brcms_isr,
1167 IRQF_SHARED, KBUILD_MODNAME, wl)) {
1168 wiphy_err(wl->wiphy, "wl%d: request_irq() failed\n", unit);
1169 goto fail;
1170 }
1171 wl->irq = pdev->irq;
1172
1173 /* register module */
1174 brcms_c_module_register(wl->pub, "linux", wl, NULL);
1175
1176 if (ieee_hw_init(hw)) {
1177 wiphy_err(wl->wiphy, "wl%d: %s: ieee_hw_init failed!\n", unit,
1178 __func__);
1179 goto fail;
1180 }
1181
1182 brcms_c_regd_init(wl->wlc);
1183
1184 memcpy(perm, &wl->pub->cur_etheraddr, ETH_ALEN);
1185 if (WARN_ON(!is_valid_ether_addr(perm)))
1186 goto fail;
1187 SET_IEEE80211_PERM_ADDR(hw, perm);
1188
1189 err = ieee80211_register_hw(hw);
1190 if (err)
1191 wiphy_err(wl->wiphy, "%s: ieee80211_register_hw failed, status"
1192 "%d\n", __func__, err);
1193
1194 if (wl->pub->srom_ccode[0] &&
1195 regulatory_hint(wl->wiphy, wl->pub->srom_ccode))
1196 wiphy_err(wl->wiphy, "%s: regulatory hint failed\n", __func__);
1197
1198 brcms_debugfs_attach(wl->pub);
1199 brcms_debugfs_create_files(wl->pub);
1200 n_adapters_found++;
1201 return wl;
1202
1203 fail:
1204 brcms_free(wl);
1205 return NULL;
1206 }
1207
1208
1209
1210 /*
1211 * determines if a device is a WL device, and if so, attaches it.
1212 *
1213 * This function determines if a device pointed to by pdev is a WL device,
1214 * and if so, performs a brcms_attach() on it.
1215 *
1216 * Perimeter lock is initialized in the course of this function.
1217 */
brcms_bcma_probe(struct bcma_device * pdev)1218 static int brcms_bcma_probe(struct bcma_device *pdev)
1219 {
1220 struct brcms_info *wl;
1221 struct ieee80211_hw *hw;
1222 int ret;
1223
1224 dev_info(&pdev->dev, "mfg %x core %x rev %d class %d irq %d\n",
1225 pdev->id.manuf, pdev->id.id, pdev->id.rev, pdev->id.class,
1226 pdev->irq);
1227
1228 if ((pdev->id.manuf != BCMA_MANUF_BCM) ||
1229 (pdev->id.id != BCMA_CORE_80211))
1230 return -ENODEV;
1231
1232 hw = ieee80211_alloc_hw(sizeof(struct brcms_info), &brcms_ops);
1233 if (!hw) {
1234 pr_err("%s: ieee80211_alloc_hw failed\n", __func__);
1235 return -ENOMEM;
1236 }
1237
1238 SET_IEEE80211_DEV(hw, &pdev->dev);
1239
1240 bcma_set_drvdata(pdev, hw);
1241
1242 memset(hw->priv, 0, sizeof(*wl));
1243
1244 wl = brcms_attach(pdev);
1245 if (!wl) {
1246 pr_err("%s: brcms_attach failed!\n", __func__);
1247 ret = -ENODEV;
1248 goto err_free_ieee80211;
1249 }
1250 brcms_led_register(wl);
1251
1252 return 0;
1253
1254 err_free_ieee80211:
1255 ieee80211_free_hw(hw);
1256 return ret;
1257 }
1258
brcms_suspend(struct bcma_device * pdev)1259 static int brcms_suspend(struct bcma_device *pdev)
1260 {
1261 struct brcms_info *wl;
1262 struct ieee80211_hw *hw;
1263
1264 hw = bcma_get_drvdata(pdev);
1265 wl = hw->priv;
1266 if (!wl) {
1267 pr_err("%s: %s: no driver private struct!\n", KBUILD_MODNAME,
1268 __func__);
1269 return -ENODEV;
1270 }
1271
1272 /* only need to flag hw is down for proper resume */
1273 spin_lock_bh(&wl->lock);
1274 wl->pub->hw_up = false;
1275 spin_unlock_bh(&wl->lock);
1276
1277 brcms_dbg_info(wl->wlc->hw->d11core, "brcms_suspend ok\n");
1278
1279 return 0;
1280 }
1281
brcms_resume(struct bcma_device * pdev)1282 static int brcms_resume(struct bcma_device *pdev)
1283 {
1284 return 0;
1285 }
1286
1287 static struct bcma_driver brcms_bcma_driver = {
1288 .name = KBUILD_MODNAME,
1289 .probe = brcms_bcma_probe,
1290 .suspend = brcms_suspend,
1291 .resume = brcms_resume,
1292 .remove = brcms_remove,
1293 .id_table = brcms_coreid_table,
1294 };
1295
1296 /*
1297 * This is the main entry point for the brcmsmac driver.
1298 *
1299 * This function is scheduled upon module initialization and
1300 * does the driver registration, which result in brcms_bcma_probe()
1301 * call resulting in the driver bringup.
1302 */
brcms_driver_init(struct work_struct * work)1303 static void brcms_driver_init(struct work_struct *work)
1304 {
1305 int error;
1306
1307 error = bcma_driver_register(&brcms_bcma_driver);
1308 if (error)
1309 pr_err("%s: register returned %d\n", __func__, error);
1310 }
1311
1312 static DECLARE_WORK(brcms_driver_work, brcms_driver_init);
1313
brcms_module_init(void)1314 static int __init brcms_module_init(void)
1315 {
1316 brcms_debugfs_init();
1317 if (!schedule_work(&brcms_driver_work))
1318 return -EBUSY;
1319
1320 return 0;
1321 }
1322
1323 /*
1324 * This function unloads the brcmsmac driver from the system.
1325 *
1326 * This function unconditionally unloads the brcmsmac driver module from the
1327 * system.
1328 *
1329 */
brcms_module_exit(void)1330 static void __exit brcms_module_exit(void)
1331 {
1332 cancel_work_sync(&brcms_driver_work);
1333 bcma_driver_unregister(&brcms_bcma_driver);
1334 brcms_debugfs_exit();
1335 }
1336
1337 module_init(brcms_module_init);
1338 module_exit(brcms_module_exit);
1339
1340 /*
1341 * precondition: perimeter lock has been acquired
1342 */
brcms_txflowcontrol(struct brcms_info * wl,struct brcms_if * wlif,bool state,int prio)1343 void brcms_txflowcontrol(struct brcms_info *wl, struct brcms_if *wlif,
1344 bool state, int prio)
1345 {
1346 brcms_err(wl->wlc->hw->d11core, "Shouldn't be here %s\n", __func__);
1347 }
1348
1349 /*
1350 * precondition: perimeter lock has been acquired
1351 */
brcms_init(struct brcms_info * wl)1352 void brcms_init(struct brcms_info *wl)
1353 {
1354 brcms_dbg_info(wl->wlc->hw->d11core, "Initializing wl%d\n",
1355 wl->pub->unit);
1356 brcms_reset(wl);
1357 brcms_c_init(wl->wlc, wl->mute_tx);
1358 }
1359
1360 /*
1361 * precondition: perimeter lock has been acquired
1362 */
brcms_reset(struct brcms_info * wl)1363 uint brcms_reset(struct brcms_info *wl)
1364 {
1365 brcms_dbg_info(wl->wlc->hw->d11core, "Resetting wl%d\n", wl->pub->unit);
1366 brcms_c_reset(wl->wlc);
1367
1368 /* dpc will not be rescheduled */
1369 wl->resched = false;
1370
1371 /* inform publicly that interface is down */
1372 wl->pub->up = false;
1373
1374 return 0;
1375 }
1376
brcms_fatal_error(struct brcms_info * wl)1377 void brcms_fatal_error(struct brcms_info *wl)
1378 {
1379 brcms_err(wl->wlc->hw->d11core, "wl%d: fatal error, reinitializing\n",
1380 wl->wlc->pub->unit);
1381 brcms_reset(wl);
1382 ieee80211_restart_hw(wl->pub->ieee_hw);
1383 }
1384
1385 /*
1386 * These are interrupt on/off entry points. Disable interrupts
1387 * during interrupt state transition.
1388 */
brcms_intrson(struct brcms_info * wl)1389 void brcms_intrson(struct brcms_info *wl)
1390 {
1391 unsigned long flags;
1392
1393 spin_lock_irqsave(&wl->isr_lock, flags);
1394 brcms_c_intrson(wl->wlc);
1395 spin_unlock_irqrestore(&wl->isr_lock, flags);
1396 }
1397
brcms_intrsoff(struct brcms_info * wl)1398 u32 brcms_intrsoff(struct brcms_info *wl)
1399 {
1400 unsigned long flags;
1401 u32 status;
1402
1403 spin_lock_irqsave(&wl->isr_lock, flags);
1404 status = brcms_c_intrsoff(wl->wlc);
1405 spin_unlock_irqrestore(&wl->isr_lock, flags);
1406 return status;
1407 }
1408
brcms_intrsrestore(struct brcms_info * wl,u32 macintmask)1409 void brcms_intrsrestore(struct brcms_info *wl, u32 macintmask)
1410 {
1411 unsigned long flags;
1412
1413 spin_lock_irqsave(&wl->isr_lock, flags);
1414 brcms_c_intrsrestore(wl->wlc, macintmask);
1415 spin_unlock_irqrestore(&wl->isr_lock, flags);
1416 }
1417
1418 /*
1419 * precondition: perimeter lock has been acquired
1420 */
brcms_up(struct brcms_info * wl)1421 int brcms_up(struct brcms_info *wl)
1422 {
1423 int error = 0;
1424
1425 if (wl->pub->up)
1426 return 0;
1427
1428 error = brcms_c_up(wl->wlc);
1429
1430 return error;
1431 }
1432
1433 /*
1434 * precondition: perimeter lock has been acquired
1435 */
brcms_down(struct brcms_info * wl)1436 void brcms_down(struct brcms_info *wl)
1437 __must_hold(&wl->lock)
1438 {
1439 uint callbacks, ret_val = 0;
1440
1441 /* call common down function */
1442 ret_val = brcms_c_down(wl->wlc);
1443 callbacks = atomic_read(&wl->callbacks) - ret_val;
1444
1445 /* wait for down callbacks to complete */
1446 spin_unlock_bh(&wl->lock);
1447
1448 /* For HIGH_only driver, it's important to actually schedule other work,
1449 * not just spin wait since everything runs at schedule level
1450 */
1451 SPINWAIT((atomic_read(&wl->callbacks) > callbacks), 100 * 1000);
1452
1453 spin_lock_bh(&wl->lock);
1454 }
1455
1456 /*
1457 * precondition: perimeter lock is not acquired
1458 */
_brcms_timer(struct work_struct * work)1459 static void _brcms_timer(struct work_struct *work)
1460 {
1461 struct brcms_timer *t = container_of(work, struct brcms_timer,
1462 dly_wrk.work);
1463
1464 spin_lock_bh(&t->wl->lock);
1465
1466 if (t->set) {
1467 if (t->periodic) {
1468 atomic_inc(&t->wl->callbacks);
1469 ieee80211_queue_delayed_work(t->wl->pub->ieee_hw,
1470 &t->dly_wrk,
1471 msecs_to_jiffies(t->ms));
1472 } else {
1473 t->set = false;
1474 }
1475
1476 t->fn(t->arg);
1477 }
1478
1479 atomic_dec(&t->wl->callbacks);
1480
1481 spin_unlock_bh(&t->wl->lock);
1482 }
1483
1484 /*
1485 * Adds a timer to the list. Caller supplies a timer function.
1486 * Is called from wlc.
1487 *
1488 * precondition: perimeter lock has been acquired
1489 */
brcms_init_timer(struct brcms_info * wl,void (* fn)(void * arg),void * arg,const char * name)1490 struct brcms_timer *brcms_init_timer(struct brcms_info *wl,
1491 void (*fn) (void *arg),
1492 void *arg, const char *name)
1493 {
1494 struct brcms_timer *t;
1495
1496 t = kzalloc(sizeof(struct brcms_timer), GFP_ATOMIC);
1497 if (!t)
1498 return NULL;
1499
1500 INIT_DELAYED_WORK(&t->dly_wrk, _brcms_timer);
1501 t->wl = wl;
1502 t->fn = fn;
1503 t->arg = arg;
1504 t->next = wl->timers;
1505 wl->timers = t;
1506
1507 #ifdef DEBUG
1508 t->name = kstrdup(name, GFP_ATOMIC);
1509 #endif
1510
1511 return t;
1512 }
1513
1514 /*
1515 * adds only the kernel timer since it's going to be more accurate
1516 * as well as it's easier to make it periodic
1517 *
1518 * precondition: perimeter lock has been acquired
1519 */
brcms_add_timer(struct brcms_timer * t,uint ms,int periodic)1520 void brcms_add_timer(struct brcms_timer *t, uint ms, int periodic)
1521 {
1522 struct ieee80211_hw *hw = t->wl->pub->ieee_hw;
1523
1524 #ifdef DEBUG
1525 if (t->set)
1526 brcms_dbg_info(t->wl->wlc->hw->d11core,
1527 "%s: Already set. Name: %s, per %d\n",
1528 __func__, t->name, periodic);
1529 #endif
1530 t->ms = ms;
1531 t->periodic = (bool) periodic;
1532 if (!t->set) {
1533 t->set = true;
1534 atomic_inc(&t->wl->callbacks);
1535 }
1536
1537 ieee80211_queue_delayed_work(hw, &t->dly_wrk, msecs_to_jiffies(ms));
1538 }
1539
1540 /*
1541 * return true if timer successfully deleted, false if still pending
1542 *
1543 * precondition: perimeter lock has been acquired
1544 */
brcms_del_timer(struct brcms_timer * t)1545 bool brcms_del_timer(struct brcms_timer *t)
1546 {
1547 if (t->set) {
1548 t->set = false;
1549 if (!cancel_delayed_work(&t->dly_wrk))
1550 return false;
1551
1552 atomic_dec(&t->wl->callbacks);
1553 }
1554
1555 return true;
1556 }
1557
1558 /*
1559 * precondition: perimeter lock has been acquired
1560 */
brcms_free_timer(struct brcms_timer * t)1561 void brcms_free_timer(struct brcms_timer *t)
1562 {
1563 struct brcms_info *wl = t->wl;
1564 struct brcms_timer *tmp;
1565
1566 /* delete the timer in case it is active */
1567 brcms_del_timer(t);
1568
1569 if (wl->timers == t) {
1570 wl->timers = wl->timers->next;
1571 #ifdef DEBUG
1572 kfree(t->name);
1573 #endif
1574 kfree(t);
1575 return;
1576
1577 }
1578
1579 tmp = wl->timers;
1580 while (tmp) {
1581 if (tmp->next == t) {
1582 tmp->next = t->next;
1583 #ifdef DEBUG
1584 kfree(t->name);
1585 #endif
1586 kfree(t);
1587 return;
1588 }
1589 tmp = tmp->next;
1590 }
1591
1592 }
1593
1594 /*
1595 * precondition: no locking required
1596 */
brcms_ucode_init_buf(struct brcms_info * wl,void ** pbuf,u32 idx)1597 int brcms_ucode_init_buf(struct brcms_info *wl, void **pbuf, u32 idx)
1598 {
1599 int i, entry;
1600 const u8 *pdata;
1601 struct firmware_hdr *hdr;
1602 for (i = 0; i < wl->fw.fw_cnt; i++) {
1603 hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
1604 for (entry = 0; entry < wl->fw.hdr_num_entries[i];
1605 entry++, hdr++) {
1606 u32 len = le32_to_cpu(hdr->len);
1607 if (le32_to_cpu(hdr->idx) == idx) {
1608 pdata = wl->fw.fw_bin[i]->data +
1609 le32_to_cpu(hdr->offset);
1610 *pbuf = kvmalloc(len, GFP_KERNEL);
1611 if (*pbuf == NULL)
1612 goto fail;
1613 memcpy(*pbuf, pdata, len);
1614 return 0;
1615 }
1616 }
1617 }
1618 brcms_err(wl->wlc->hw->d11core,
1619 "ERROR: ucode buf tag:%d can not be found!\n", idx);
1620 *pbuf = NULL;
1621 fail:
1622 return -ENODATA;
1623 }
1624
1625 /*
1626 * Precondition: Since this function is called in brcms_bcma_probe() context,
1627 * no locking is required.
1628 */
brcms_ucode_init_uint(struct brcms_info * wl,size_t * n_bytes,u32 idx)1629 int brcms_ucode_init_uint(struct brcms_info *wl, size_t *n_bytes, u32 idx)
1630 {
1631 int i, entry;
1632 const u8 *pdata;
1633 struct firmware_hdr *hdr;
1634 for (i = 0; i < wl->fw.fw_cnt; i++) {
1635 hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
1636 for (entry = 0; entry < wl->fw.hdr_num_entries[i];
1637 entry++, hdr++) {
1638 if (le32_to_cpu(hdr->idx) == idx) {
1639 pdata = wl->fw.fw_bin[i]->data +
1640 le32_to_cpu(hdr->offset);
1641 if (le32_to_cpu(hdr->len) != 4) {
1642 brcms_err(wl->wlc->hw->d11core,
1643 "ERROR: fw hdr len\n");
1644 return -ENOMSG;
1645 }
1646 *n_bytes = le32_to_cpu(*((__le32 *) pdata));
1647 return 0;
1648 }
1649 }
1650 }
1651 brcms_err(wl->wlc->hw->d11core,
1652 "ERROR: ucode tag:%d can not be found!\n", idx);
1653 return -ENOMSG;
1654 }
1655
1656 /*
1657 * precondition: can both be called locked and unlocked
1658 */
brcms_ucode_free_buf(void * p)1659 void brcms_ucode_free_buf(void *p)
1660 {
1661 kvfree(p);
1662 }
1663
1664 /*
1665 * checks validity of all firmware images loaded from user space
1666 *
1667 * Precondition: Since this function is called in brcms_bcma_probe() context,
1668 * no locking is required.
1669 */
brcms_check_firmwares(struct brcms_info * wl)1670 int brcms_check_firmwares(struct brcms_info *wl)
1671 {
1672 int i;
1673 int entry;
1674 int rc = 0;
1675 const struct firmware *fw;
1676 const struct firmware *fw_hdr;
1677 struct firmware_hdr *ucode_hdr;
1678 for (i = 0; i < MAX_FW_IMAGES && rc == 0; i++) {
1679 fw = wl->fw.fw_bin[i];
1680 fw_hdr = wl->fw.fw_hdr[i];
1681 if (fw == NULL && fw_hdr == NULL) {
1682 break;
1683 } else if (fw == NULL || fw_hdr == NULL) {
1684 wiphy_err(wl->wiphy, "%s: invalid bin/hdr fw\n",
1685 __func__);
1686 rc = -EBADF;
1687 } else if (fw_hdr->size % sizeof(struct firmware_hdr)) {
1688 wiphy_err(wl->wiphy, "%s: non integral fw hdr file "
1689 "size %zu/%zu\n", __func__, fw_hdr->size,
1690 sizeof(struct firmware_hdr));
1691 rc = -EBADF;
1692 } else if (fw->size < MIN_FW_SIZE || fw->size > MAX_FW_SIZE) {
1693 wiphy_err(wl->wiphy, "%s: out of bounds fw file size %zu\n",
1694 __func__, fw->size);
1695 rc = -EBADF;
1696 } else {
1697 /* check if ucode section overruns firmware image */
1698 ucode_hdr = (struct firmware_hdr *)fw_hdr->data;
1699 for (entry = 0; entry < wl->fw.hdr_num_entries[i] &&
1700 !rc; entry++, ucode_hdr++) {
1701 if (le32_to_cpu(ucode_hdr->offset) +
1702 le32_to_cpu(ucode_hdr->len) >
1703 fw->size) {
1704 wiphy_err(wl->wiphy,
1705 "%s: conflicting bin/hdr\n",
1706 __func__);
1707 rc = -EBADF;
1708 }
1709 }
1710 }
1711 }
1712 if (rc == 0 && wl->fw.fw_cnt != i) {
1713 wiphy_err(wl->wiphy, "%s: invalid fw_cnt=%d\n", __func__,
1714 wl->fw.fw_cnt);
1715 rc = -EBADF;
1716 }
1717 return rc;
1718 }
1719
1720 /*
1721 * precondition: perimeter lock has been acquired
1722 */
brcms_rfkill_set_hw_state(struct brcms_info * wl)1723 bool brcms_rfkill_set_hw_state(struct brcms_info *wl)
1724 __must_hold(&wl->lock)
1725 {
1726 bool blocked = brcms_c_check_radio_disabled(wl->wlc);
1727
1728 spin_unlock_bh(&wl->lock);
1729 wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
1730 if (blocked)
1731 wiphy_rfkill_start_polling(wl->pub->ieee_hw->wiphy);
1732 spin_lock_bh(&wl->lock);
1733 return blocked;
1734 }
1735