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_SUPPORTED_DEVICE("Broadcom 802.11n WLAN cards");
91 MODULE_LICENSE("Dual BSD/GPL");
92 /* This needs to be adjusted when brcms_firmwares changes */
93 MODULE_FIRMWARE("brcm/bcm43xx-0.fw");
94 MODULE_FIRMWARE("brcm/bcm43xx_hdr-0.fw");
95
96 /* recognized BCMA Core IDs */
97 static struct bcma_device_id brcms_coreid_table[] = {
98 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 17, BCMA_ANY_CLASS),
99 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 23, BCMA_ANY_CLASS),
100 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, 24, BCMA_ANY_CLASS),
101 {},
102 };
103 MODULE_DEVICE_TABLE(bcma, brcms_coreid_table);
104
105 #if defined(CONFIG_BRCMDBG)
106 /*
107 * Module parameter for setting the debug message level. Available
108 * flags are specified by the BRCM_DL_* macros in
109 * drivers/net/wireless/brcm80211/include/defs.h.
110 */
111 module_param_named(debug, brcm_msg_level, uint, 0644);
112 #endif
113
114 static struct ieee80211_channel brcms_2ghz_chantable[] = {
115 CHAN2GHZ(1, 2412, IEEE80211_CHAN_NO_HT40MINUS),
116 CHAN2GHZ(2, 2417, IEEE80211_CHAN_NO_HT40MINUS),
117 CHAN2GHZ(3, 2422, IEEE80211_CHAN_NO_HT40MINUS),
118 CHAN2GHZ(4, 2427, IEEE80211_CHAN_NO_HT40MINUS),
119 CHAN2GHZ(5, 2432, 0),
120 CHAN2GHZ(6, 2437, 0),
121 CHAN2GHZ(7, 2442, 0),
122 CHAN2GHZ(8, 2447, IEEE80211_CHAN_NO_HT40PLUS),
123 CHAN2GHZ(9, 2452, IEEE80211_CHAN_NO_HT40PLUS),
124 CHAN2GHZ(10, 2457, IEEE80211_CHAN_NO_HT40PLUS),
125 CHAN2GHZ(11, 2462, IEEE80211_CHAN_NO_HT40PLUS),
126 CHAN2GHZ(12, 2467,
127 IEEE80211_CHAN_NO_IR |
128 IEEE80211_CHAN_NO_HT40PLUS),
129 CHAN2GHZ(13, 2472,
130 IEEE80211_CHAN_NO_IR |
131 IEEE80211_CHAN_NO_HT40PLUS),
132 CHAN2GHZ(14, 2484,
133 IEEE80211_CHAN_NO_IR |
134 IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS |
135 IEEE80211_CHAN_NO_OFDM)
136 };
137
138 static struct ieee80211_channel brcms_5ghz_nphy_chantable[] = {
139 /* UNII-1 */
140 CHAN5GHZ(36, IEEE80211_CHAN_NO_HT40MINUS),
141 CHAN5GHZ(40, IEEE80211_CHAN_NO_HT40PLUS),
142 CHAN5GHZ(44, IEEE80211_CHAN_NO_HT40MINUS),
143 CHAN5GHZ(48, IEEE80211_CHAN_NO_HT40PLUS),
144 /* UNII-2 */
145 CHAN5GHZ(52,
146 IEEE80211_CHAN_RADAR |
147 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
148 CHAN5GHZ(56,
149 IEEE80211_CHAN_RADAR |
150 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
151 CHAN5GHZ(60,
152 IEEE80211_CHAN_RADAR |
153 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
154 CHAN5GHZ(64,
155 IEEE80211_CHAN_RADAR |
156 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
157 /* MID */
158 CHAN5GHZ(100,
159 IEEE80211_CHAN_RADAR |
160 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
161 CHAN5GHZ(104,
162 IEEE80211_CHAN_RADAR |
163 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
164 CHAN5GHZ(108,
165 IEEE80211_CHAN_RADAR |
166 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
167 CHAN5GHZ(112,
168 IEEE80211_CHAN_RADAR |
169 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
170 CHAN5GHZ(116,
171 IEEE80211_CHAN_RADAR |
172 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
173 CHAN5GHZ(120,
174 IEEE80211_CHAN_RADAR |
175 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
176 CHAN5GHZ(124,
177 IEEE80211_CHAN_RADAR |
178 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
179 CHAN5GHZ(128,
180 IEEE80211_CHAN_RADAR |
181 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
182 CHAN5GHZ(132,
183 IEEE80211_CHAN_RADAR |
184 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40MINUS),
185 CHAN5GHZ(136,
186 IEEE80211_CHAN_RADAR |
187 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS),
188 CHAN5GHZ(140,
189 IEEE80211_CHAN_RADAR |
190 IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_HT40PLUS |
191 IEEE80211_CHAN_NO_HT40MINUS),
192 /* UNII-3 */
193 CHAN5GHZ(149, IEEE80211_CHAN_NO_HT40MINUS),
194 CHAN5GHZ(153, IEEE80211_CHAN_NO_HT40PLUS),
195 CHAN5GHZ(157, IEEE80211_CHAN_NO_HT40MINUS),
196 CHAN5GHZ(161, IEEE80211_CHAN_NO_HT40PLUS),
197 CHAN5GHZ(165, IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS)
198 };
199
200 /*
201 * The rate table is used for both 2.4G and 5G rates. The
202 * latter being a subset as it does not support CCK rates.
203 */
204 static struct ieee80211_rate legacy_ratetable[] = {
205 RATE(10, 0),
206 RATE(20, IEEE80211_RATE_SHORT_PREAMBLE),
207 RATE(55, IEEE80211_RATE_SHORT_PREAMBLE),
208 RATE(110, IEEE80211_RATE_SHORT_PREAMBLE),
209 RATE(60, 0),
210 RATE(90, 0),
211 RATE(120, 0),
212 RATE(180, 0),
213 RATE(240, 0),
214 RATE(360, 0),
215 RATE(480, 0),
216 RATE(540, 0),
217 };
218
219 static const struct ieee80211_supported_band brcms_band_2GHz_nphy_template = {
220 .band = NL80211_BAND_2GHZ,
221 .channels = brcms_2ghz_chantable,
222 .n_channels = ARRAY_SIZE(brcms_2ghz_chantable),
223 .bitrates = legacy_ratetable,
224 .n_bitrates = ARRAY_SIZE(legacy_ratetable),
225 .ht_cap = {
226 /* from include/linux/ieee80211.h */
227 .cap = IEEE80211_HT_CAP_GRN_FLD |
228 IEEE80211_HT_CAP_SGI_20 | IEEE80211_HT_CAP_SGI_40,
229 .ht_supported = true,
230 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
231 .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
232 .mcs = {
233 /* placeholders for now */
234 .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
235 .rx_highest = cpu_to_le16(500),
236 .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
237 }
238 };
239
240 static const struct ieee80211_supported_band brcms_band_5GHz_nphy_template = {
241 .band = NL80211_BAND_5GHZ,
242 .channels = brcms_5ghz_nphy_chantable,
243 .n_channels = ARRAY_SIZE(brcms_5ghz_nphy_chantable),
244 .bitrates = legacy_ratetable + BRCMS_LEGACY_5G_RATE_OFFSET,
245 .n_bitrates = ARRAY_SIZE(legacy_ratetable) -
246 BRCMS_LEGACY_5G_RATE_OFFSET,
247 .ht_cap = {
248 .cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 |
249 IEEE80211_HT_CAP_SGI_40,
250 .ht_supported = true,
251 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
252 .ampdu_density = AMPDU_DEF_MPDU_DENSITY,
253 .mcs = {
254 /* placeholders for now */
255 .rx_mask = {0xff, 0xff, 0, 0, 0, 0, 0, 0, 0, 0},
256 .rx_highest = cpu_to_le16(500),
257 .tx_params = IEEE80211_HT_MCS_TX_DEFINED}
258 }
259 };
260
261 /* flags the given rate in rateset as requested */
brcms_set_basic_rate(struct brcm_rateset * rs,u16 rate,bool is_br)262 static void brcms_set_basic_rate(struct brcm_rateset *rs, u16 rate, bool is_br)
263 {
264 u32 i;
265
266 for (i = 0; i < rs->count; i++) {
267 if (rate != (rs->rates[i] & 0x7f))
268 continue;
269
270 if (is_br)
271 rs->rates[i] |= BRCMS_RATE_FLAG;
272 else
273 rs->rates[i] &= BRCMS_RATE_MASK;
274 return;
275 }
276 }
277
278 /*
279 * This function frees the WL per-device resources.
280 *
281 * This function frees resources owned by the WL device pointed to
282 * by the wl parameter.
283 *
284 * precondition: can both be called locked and unlocked
285 */
brcms_free(struct brcms_info * wl)286 static void brcms_free(struct brcms_info *wl)
287 {
288 struct brcms_timer *t, *next;
289
290 /* free ucode data */
291 if (wl->fw.fw_cnt)
292 brcms_ucode_data_free(&wl->ucode);
293 if (wl->irq)
294 free_irq(wl->irq, wl);
295
296 /* kill dpc */
297 tasklet_kill(&wl->tasklet);
298
299 if (wl->pub) {
300 brcms_debugfs_detach(wl->pub);
301 brcms_c_module_unregister(wl->pub, "linux", wl);
302 }
303
304 /* free common resources */
305 if (wl->wlc) {
306 brcms_c_detach(wl->wlc);
307 wl->wlc = NULL;
308 wl->pub = NULL;
309 }
310
311 /* virtual interface deletion is deferred so we cannot spinwait */
312
313 /* wait for all pending callbacks to complete */
314 while (atomic_read(&wl->callbacks) > 0)
315 schedule();
316
317 /* free timers */
318 for (t = wl->timers; t; t = next) {
319 next = t->next;
320 #ifdef DEBUG
321 kfree(t->name);
322 #endif
323 kfree(t);
324 }
325 }
326
327 /*
328 * called from both kernel as from this kernel module (error flow on attach)
329 * precondition: perimeter lock is not acquired.
330 */
brcms_remove(struct bcma_device * pdev)331 static void brcms_remove(struct bcma_device *pdev)
332 {
333 struct ieee80211_hw *hw = bcma_get_drvdata(pdev);
334 struct brcms_info *wl = hw->priv;
335
336 if (wl->wlc) {
337 brcms_led_unregister(wl);
338 wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, false);
339 wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
340 ieee80211_unregister_hw(hw);
341 }
342
343 brcms_free(wl);
344
345 bcma_set_drvdata(pdev, NULL);
346 ieee80211_free_hw(hw);
347 }
348
349 /*
350 * Precondition: Since this function is called in brcms_pci_probe() context,
351 * no locking is required.
352 */
brcms_release_fw(struct brcms_info * wl)353 static void brcms_release_fw(struct brcms_info *wl)
354 {
355 int i;
356 for (i = 0; i < MAX_FW_IMAGES; i++) {
357 release_firmware(wl->fw.fw_bin[i]);
358 release_firmware(wl->fw.fw_hdr[i]);
359 }
360 }
361
362 /*
363 * Precondition: Since this function is called in brcms_pci_probe() context,
364 * no locking is required.
365 */
brcms_request_fw(struct brcms_info * wl,struct bcma_device * pdev)366 static int brcms_request_fw(struct brcms_info *wl, struct bcma_device *pdev)
367 {
368 int status;
369 struct device *device = &pdev->dev;
370 char fw_name[100];
371 int i;
372
373 memset(&wl->fw, 0, sizeof(struct brcms_firmware));
374 for (i = 0; i < MAX_FW_IMAGES; i++) {
375 if (brcms_firmwares[i] == NULL)
376 break;
377 sprintf(fw_name, "%s-%d.fw", brcms_firmwares[i],
378 UCODE_LOADER_API_VER);
379 status = request_firmware(&wl->fw.fw_bin[i], fw_name, device);
380 if (status) {
381 wiphy_err(wl->wiphy, "%s: fail to load firmware %s\n",
382 KBUILD_MODNAME, fw_name);
383 return status;
384 }
385 sprintf(fw_name, "%s_hdr-%d.fw", brcms_firmwares[i],
386 UCODE_LOADER_API_VER);
387 status = request_firmware(&wl->fw.fw_hdr[i], fw_name, device);
388 if (status) {
389 wiphy_err(wl->wiphy, "%s: fail to load firmware %s\n",
390 KBUILD_MODNAME, fw_name);
391 return status;
392 }
393 wl->fw.hdr_num_entries[i] =
394 wl->fw.fw_hdr[i]->size / (sizeof(struct firmware_hdr));
395 }
396 wl->fw.fw_cnt = i;
397 status = brcms_ucode_data_init(wl, &wl->ucode);
398 brcms_release_fw(wl);
399 return status;
400 }
401
brcms_ops_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)402 static void brcms_ops_tx(struct ieee80211_hw *hw,
403 struct ieee80211_tx_control *control,
404 struct sk_buff *skb)
405 {
406 struct brcms_info *wl = hw->priv;
407 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
408
409 spin_lock_bh(&wl->lock);
410 if (!wl->pub->up) {
411 brcms_err(wl->wlc->hw->d11core, "ops->tx called while down\n");
412 kfree_skb(skb);
413 goto done;
414 }
415 if (brcms_c_sendpkt_mac80211(wl->wlc, skb, hw))
416 tx_info->rate_driver_data[0] = control->sta;
417 done:
418 spin_unlock_bh(&wl->lock);
419 }
420
brcms_ops_start(struct ieee80211_hw * hw)421 static int brcms_ops_start(struct ieee80211_hw *hw)
422 {
423 struct brcms_info *wl = hw->priv;
424 bool blocked;
425 int err;
426
427 if (!wl->ucode.bcm43xx_bomminor) {
428 err = brcms_request_fw(wl, wl->wlc->hw->d11core);
429 if (err)
430 return -ENOENT;
431 }
432
433 ieee80211_wake_queues(hw);
434 spin_lock_bh(&wl->lock);
435 blocked = brcms_rfkill_set_hw_state(wl);
436 spin_unlock_bh(&wl->lock);
437 if (!blocked)
438 wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy);
439
440 spin_lock_bh(&wl->lock);
441 /* avoid acknowledging frames before a non-monitor device is added */
442 wl->mute_tx = true;
443
444 if (!wl->pub->up)
445 if (!blocked)
446 err = brcms_up(wl);
447 else
448 err = -ERFKILL;
449 else
450 err = -ENODEV;
451 spin_unlock_bh(&wl->lock);
452
453 if (err != 0)
454 brcms_err(wl->wlc->hw->d11core, "%s: brcms_up() returned %d\n",
455 __func__, err);
456
457 bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, true);
458 return err;
459 }
460
brcms_ops_stop(struct ieee80211_hw * hw)461 static void brcms_ops_stop(struct ieee80211_hw *hw)
462 {
463 struct brcms_info *wl = hw->priv;
464 int status;
465
466 ieee80211_stop_queues(hw);
467
468 if (wl->wlc == NULL)
469 return;
470
471 spin_lock_bh(&wl->lock);
472 status = brcms_c_chipmatch(wl->wlc->hw->d11core);
473 spin_unlock_bh(&wl->lock);
474 if (!status) {
475 brcms_err(wl->wlc->hw->d11core,
476 "wl: brcms_ops_stop: chipmatch failed\n");
477 return;
478 }
479
480 bcma_core_pci_power_save(wl->wlc->hw->d11core->bus, false);
481
482 /* put driver in down state */
483 spin_lock_bh(&wl->lock);
484 brcms_down(wl);
485 spin_unlock_bh(&wl->lock);
486 }
487
488 static int
brcms_ops_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)489 brcms_ops_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
490 {
491 struct brcms_info *wl = hw->priv;
492
493 /* Just STA, AP and ADHOC for now */
494 if (vif->type != NL80211_IFTYPE_STATION &&
495 vif->type != NL80211_IFTYPE_AP &&
496 vif->type != NL80211_IFTYPE_ADHOC) {
497 brcms_err(wl->wlc->hw->d11core,
498 "%s: Attempt to add type %d, only STA, AP and AdHoc for now\n",
499 __func__, vif->type);
500 return -EOPNOTSUPP;
501 }
502
503 spin_lock_bh(&wl->lock);
504 wl->wlc->vif = vif;
505 wl->mute_tx = false;
506 brcms_c_mute(wl->wlc, false);
507 if (vif->type == NL80211_IFTYPE_STATION)
508 brcms_c_start_station(wl->wlc, vif->addr);
509 else if (vif->type == NL80211_IFTYPE_AP)
510 brcms_c_start_ap(wl->wlc, vif->addr, vif->bss_conf.bssid,
511 vif->bss_conf.ssid, vif->bss_conf.ssid_len);
512 else if (vif->type == NL80211_IFTYPE_ADHOC)
513 brcms_c_start_adhoc(wl->wlc, vif->addr);
514 spin_unlock_bh(&wl->lock);
515
516 return 0;
517 }
518
519 static void
brcms_ops_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)520 brcms_ops_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
521 {
522 struct brcms_info *wl = hw->priv;
523
524 spin_lock_bh(&wl->lock);
525 wl->wlc->vif = NULL;
526 spin_unlock_bh(&wl->lock);
527 }
528
brcms_ops_config(struct ieee80211_hw * hw,u32 changed)529 static int brcms_ops_config(struct ieee80211_hw *hw, u32 changed)
530 {
531 struct ieee80211_conf *conf = &hw->conf;
532 struct brcms_info *wl = hw->priv;
533 struct bcma_device *core = wl->wlc->hw->d11core;
534 int err = 0;
535 int new_int;
536
537 spin_lock_bh(&wl->lock);
538 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
539 brcms_c_set_beacon_listen_interval(wl->wlc,
540 conf->listen_interval);
541 }
542 if (changed & IEEE80211_CONF_CHANGE_MONITOR)
543 brcms_dbg_info(core, "%s: change monitor mode: %s\n",
544 __func__, conf->flags & IEEE80211_CONF_MONITOR ?
545 "true" : "false");
546 if (changed & IEEE80211_CONF_CHANGE_PS)
547 brcms_err(core, "%s: change power-save mode: %s (implement)\n",
548 __func__, conf->flags & IEEE80211_CONF_PS ?
549 "true" : "false");
550
551 if (changed & IEEE80211_CONF_CHANGE_POWER) {
552 err = brcms_c_set_tx_power(wl->wlc, conf->power_level);
553 if (err < 0) {
554 brcms_err(core, "%s: Error setting power_level\n",
555 __func__);
556 goto config_out;
557 }
558 new_int = brcms_c_get_tx_power(wl->wlc);
559 if (new_int != conf->power_level)
560 brcms_err(core,
561 "%s: Power level req != actual, %d %d\n",
562 __func__, conf->power_level,
563 new_int);
564 }
565 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
566 if (conf->chandef.width == NL80211_CHAN_WIDTH_20 ||
567 conf->chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
568 err = brcms_c_set_channel(wl->wlc,
569 conf->chandef.chan->hw_value);
570 else
571 err = -ENOTSUPP;
572 }
573 if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
574 err = brcms_c_set_rate_limit(wl->wlc,
575 conf->short_frame_max_tx_count,
576 conf->long_frame_max_tx_count);
577
578 config_out:
579 spin_unlock_bh(&wl->lock);
580 return err;
581 }
582
583 static void
brcms_ops_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u32 changed)584 brcms_ops_bss_info_changed(struct ieee80211_hw *hw,
585 struct ieee80211_vif *vif,
586 struct ieee80211_bss_conf *info, u32 changed)
587 {
588 struct brcms_info *wl = hw->priv;
589 struct bcma_device *core = wl->wlc->hw->d11core;
590
591 if (changed & BSS_CHANGED_ASSOC) {
592 /* association status changed (associated/disassociated)
593 * also implies a change in the AID.
594 */
595 brcms_err(core, "%s: %s: %sassociated\n", KBUILD_MODNAME,
596 __func__, info->assoc ? "" : "dis");
597 spin_lock_bh(&wl->lock);
598 brcms_c_associate_upd(wl->wlc, info->assoc);
599 spin_unlock_bh(&wl->lock);
600 }
601 if (changed & BSS_CHANGED_ERP_SLOT) {
602 s8 val;
603
604 /* slot timing changed */
605 if (info->use_short_slot)
606 val = 1;
607 else
608 val = 0;
609 spin_lock_bh(&wl->lock);
610 brcms_c_set_shortslot_override(wl->wlc, val);
611 spin_unlock_bh(&wl->lock);
612 }
613
614 if (changed & BSS_CHANGED_HT) {
615 /* 802.11n parameters changed */
616 u16 mode = info->ht_operation_mode;
617
618 spin_lock_bh(&wl->lock);
619 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_CFG,
620 mode & IEEE80211_HT_OP_MODE_PROTECTION);
621 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_NONGF,
622 mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
623 brcms_c_protection_upd(wl->wlc, BRCMS_PROT_N_OBSS,
624 mode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT);
625 spin_unlock_bh(&wl->lock);
626 }
627 if (changed & BSS_CHANGED_BASIC_RATES) {
628 struct ieee80211_supported_band *bi;
629 u32 br_mask, i;
630 u16 rate;
631 struct brcm_rateset rs;
632 int error;
633
634 /* retrieve the current rates */
635 spin_lock_bh(&wl->lock);
636 brcms_c_get_current_rateset(wl->wlc, &rs);
637 spin_unlock_bh(&wl->lock);
638
639 br_mask = info->basic_rates;
640 bi = hw->wiphy->bands[brcms_c_get_curband(wl->wlc)];
641 for (i = 0; i < bi->n_bitrates; i++) {
642 /* convert to internal rate value */
643 rate = (bi->bitrates[i].bitrate << 1) / 10;
644
645 /* set/clear basic rate flag */
646 brcms_set_basic_rate(&rs, rate, br_mask & 1);
647 br_mask >>= 1;
648 }
649
650 /* update the rate set */
651 spin_lock_bh(&wl->lock);
652 error = brcms_c_set_rateset(wl->wlc, &rs);
653 spin_unlock_bh(&wl->lock);
654 if (error)
655 brcms_err(core, "changing basic rates failed: %d\n",
656 error);
657 }
658 if (changed & BSS_CHANGED_BEACON_INT) {
659 /* Beacon interval changed */
660 spin_lock_bh(&wl->lock);
661 brcms_c_set_beacon_period(wl->wlc, info->beacon_int);
662 spin_unlock_bh(&wl->lock);
663 }
664 if (changed & BSS_CHANGED_BSSID) {
665 /* BSSID changed, for whatever reason (IBSS and managed mode) */
666 spin_lock_bh(&wl->lock);
667 brcms_c_set_addrmatch(wl->wlc, RCM_BSSID_OFFSET, info->bssid);
668 spin_unlock_bh(&wl->lock);
669 }
670 if (changed & BSS_CHANGED_SSID) {
671 /* BSSID changed, for whatever reason (IBSS and managed mode) */
672 spin_lock_bh(&wl->lock);
673 brcms_c_set_ssid(wl->wlc, info->ssid, info->ssid_len);
674 spin_unlock_bh(&wl->lock);
675 }
676 if (changed & BSS_CHANGED_BEACON) {
677 /* Beacon data changed, retrieve new beacon (beaconing modes) */
678 struct sk_buff *beacon;
679 u16 tim_offset = 0;
680
681 spin_lock_bh(&wl->lock);
682 beacon = ieee80211_beacon_get_tim(hw, vif, &tim_offset, NULL);
683 brcms_c_set_new_beacon(wl->wlc, beacon, tim_offset,
684 info->dtim_period);
685 spin_unlock_bh(&wl->lock);
686 }
687
688 if (changed & BSS_CHANGED_AP_PROBE_RESP) {
689 struct sk_buff *probe_resp;
690
691 spin_lock_bh(&wl->lock);
692 probe_resp = ieee80211_proberesp_get(hw, vif);
693 brcms_c_set_new_probe_resp(wl->wlc, probe_resp);
694 spin_unlock_bh(&wl->lock);
695 }
696
697 if (changed & BSS_CHANGED_BEACON_ENABLED) {
698 /* Beaconing should be enabled/disabled (beaconing modes) */
699 brcms_err(core, "%s: Beacon enabled: %s\n", __func__,
700 info->enable_beacon ? "true" : "false");
701 if (info->enable_beacon &&
702 hw->wiphy->flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) {
703 brcms_c_enable_probe_resp(wl->wlc, true);
704 } else {
705 brcms_c_enable_probe_resp(wl->wlc, false);
706 }
707 }
708
709 if (changed & BSS_CHANGED_CQM) {
710 /* Connection quality monitor config changed */
711 brcms_err(core, "%s: cqm change: threshold %d, hys %d "
712 " (implement)\n", __func__, info->cqm_rssi_thold,
713 info->cqm_rssi_hyst);
714 }
715
716 if (changed & BSS_CHANGED_IBSS) {
717 /* IBSS join status changed */
718 brcms_err(core, "%s: IBSS joined: %s (implement)\n",
719 __func__, info->ibss_joined ? "true" : "false");
720 }
721
722 if (changed & BSS_CHANGED_ARP_FILTER) {
723 /* Hardware ARP filter address list or state changed */
724 brcms_err(core, "%s: arp filtering: %d addresses"
725 " (implement)\n", __func__, info->arp_addr_cnt);
726 }
727
728 if (changed & BSS_CHANGED_QOS) {
729 /*
730 * QoS for this association was enabled/disabled.
731 * Note that it is only ever disabled for station mode.
732 */
733 brcms_err(core, "%s: qos enabled: %s (implement)\n",
734 __func__, info->qos ? "true" : "false");
735 }
736 return;
737 }
738
739 static void
brcms_ops_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)740 brcms_ops_configure_filter(struct ieee80211_hw *hw,
741 unsigned int changed_flags,
742 unsigned int *total_flags, u64 multicast)
743 {
744 struct brcms_info *wl = hw->priv;
745 struct bcma_device *core = wl->wlc->hw->d11core;
746
747 changed_flags &= MAC_FILTERS;
748 *total_flags &= MAC_FILTERS;
749
750 if (changed_flags & FIF_ALLMULTI)
751 brcms_dbg_info(core, "FIF_ALLMULTI\n");
752 if (changed_flags & FIF_FCSFAIL)
753 brcms_dbg_info(core, "FIF_FCSFAIL\n");
754 if (changed_flags & FIF_CONTROL)
755 brcms_dbg_info(core, "FIF_CONTROL\n");
756 if (changed_flags & FIF_OTHER_BSS)
757 brcms_dbg_info(core, "FIF_OTHER_BSS\n");
758 if (changed_flags & FIF_PSPOLL)
759 brcms_dbg_info(core, "FIF_PSPOLL\n");
760 if (changed_flags & FIF_BCN_PRBRESP_PROMISC)
761 brcms_dbg_info(core, "FIF_BCN_PRBRESP_PROMISC\n");
762
763 spin_lock_bh(&wl->lock);
764 brcms_c_mac_promisc(wl->wlc, *total_flags);
765 spin_unlock_bh(&wl->lock);
766 return;
767 }
768
brcms_ops_sw_scan_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const u8 * mac_addr)769 static void brcms_ops_sw_scan_start(struct ieee80211_hw *hw,
770 struct ieee80211_vif *vif,
771 const u8 *mac_addr)
772 {
773 struct brcms_info *wl = hw->priv;
774 spin_lock_bh(&wl->lock);
775 brcms_c_scan_start(wl->wlc);
776 spin_unlock_bh(&wl->lock);
777 return;
778 }
779
brcms_ops_sw_scan_complete(struct ieee80211_hw * hw,struct ieee80211_vif * vif)780 static void brcms_ops_sw_scan_complete(struct ieee80211_hw *hw,
781 struct ieee80211_vif *vif)
782 {
783 struct brcms_info *wl = hw->priv;
784 spin_lock_bh(&wl->lock);
785 brcms_c_scan_stop(wl->wlc);
786 spin_unlock_bh(&wl->lock);
787 return;
788 }
789
790 static int
brcms_ops_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)791 brcms_ops_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 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->scb = scb;
814 wl->pub->global_ampdu->max_pdu = 16;
815
816 /*
817 * minstrel_ht initiates addBA on our behalf by calling
818 * ieee80211_start_tx_ba_session()
819 */
820 return 0;
821 }
822
823 static int
brcms_ops_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)824 brcms_ops_ampdu_action(struct ieee80211_hw *hw,
825 struct ieee80211_vif *vif,
826 struct ieee80211_ampdu_params *params)
827 {
828 struct brcms_info *wl = hw->priv;
829 struct scb *scb = &wl->wlc->pri_scb;
830 int status;
831 struct ieee80211_sta *sta = params->sta;
832 enum ieee80211_ampdu_mlme_action action = params->action;
833 u16 tid = params->tid;
834 u8 buf_size = params->buf_size;
835
836 if (WARN_ON(scb->magic != SCB_MAGIC))
837 return -EIDRM;
838 switch (action) {
839 case IEEE80211_AMPDU_RX_START:
840 break;
841 case IEEE80211_AMPDU_RX_STOP:
842 break;
843 case IEEE80211_AMPDU_TX_START:
844 spin_lock_bh(&wl->lock);
845 status = brcms_c_aggregatable(wl->wlc, tid);
846 spin_unlock_bh(&wl->lock);
847 if (!status) {
848 brcms_dbg_ht(wl->wlc->hw->d11core,
849 "START: tid %d is not agg\'able\n", tid);
850 return -EINVAL;
851 }
852 return IEEE80211_AMPDU_TX_START_IMMEDIATE;
853
854 case IEEE80211_AMPDU_TX_STOP_CONT:
855 case IEEE80211_AMPDU_TX_STOP_FLUSH:
856 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
857 spin_lock_bh(&wl->lock);
858 brcms_c_ampdu_flush(wl->wlc, sta, tid);
859 spin_unlock_bh(&wl->lock);
860 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
861 break;
862 case IEEE80211_AMPDU_TX_OPERATIONAL:
863 /*
864 * BA window size from ADDBA response ('buf_size') defines how
865 * many outstanding MPDUs are allowed for the BA stream by
866 * recipient and traffic class. 'ampdu_factor' gives maximum
867 * AMPDU size.
868 */
869 spin_lock_bh(&wl->lock);
870 brcms_c_ampdu_tx_operational(wl->wlc, tid, buf_size,
871 (1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
872 sta->ht_cap.ampdu_factor)) - 1);
873 spin_unlock_bh(&wl->lock);
874 /* Power save wakeup */
875 break;
876 default:
877 brcms_err(wl->wlc->hw->d11core,
878 "%s: Invalid command, ignoring\n", __func__);
879 }
880
881 return 0;
882 }
883
brcms_ops_rfkill_poll(struct ieee80211_hw * hw)884 static void brcms_ops_rfkill_poll(struct ieee80211_hw *hw)
885 {
886 struct brcms_info *wl = hw->priv;
887 bool blocked;
888
889 spin_lock_bh(&wl->lock);
890 blocked = brcms_c_check_radio_disabled(wl->wlc);
891 spin_unlock_bh(&wl->lock);
892
893 wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
894 }
895
brcms_tx_flush_completed(struct brcms_info * wl)896 static bool brcms_tx_flush_completed(struct brcms_info *wl)
897 {
898 bool result;
899
900 spin_lock_bh(&wl->lock);
901 result = brcms_c_tx_flush_completed(wl->wlc);
902 spin_unlock_bh(&wl->lock);
903 return result;
904 }
905
brcms_ops_flush(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 queues,bool drop)906 static void brcms_ops_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
907 u32 queues, bool drop)
908 {
909 struct brcms_info *wl = hw->priv;
910 int ret;
911
912 no_printk("%s: drop = %s\n", __func__, drop ? "true" : "false");
913
914 ret = wait_event_timeout(wl->tx_flush_wq,
915 brcms_tx_flush_completed(wl),
916 msecs_to_jiffies(BRCMS_FLUSH_TIMEOUT));
917
918 brcms_dbg_mac80211(wl->wlc->hw->d11core,
919 "ret=%d\n", jiffies_to_msecs(ret));
920 }
921
brcms_ops_get_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif)922 static u64 brcms_ops_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
923 {
924 struct brcms_info *wl = hw->priv;
925 u64 tsf;
926
927 spin_lock_bh(&wl->lock);
928 tsf = brcms_c_tsf_get(wl->wlc);
929 spin_unlock_bh(&wl->lock);
930
931 return tsf;
932 }
933
brcms_ops_set_tsf(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u64 tsf)934 static void brcms_ops_set_tsf(struct ieee80211_hw *hw,
935 struct ieee80211_vif *vif, u64 tsf)
936 {
937 struct brcms_info *wl = hw->priv;
938
939 spin_lock_bh(&wl->lock);
940 brcms_c_tsf_set(wl->wlc, tsf);
941 spin_unlock_bh(&wl->lock);
942 }
943
brcms_ops_beacon_set_tim(struct ieee80211_hw * hw,struct ieee80211_sta * sta,bool set)944 static int brcms_ops_beacon_set_tim(struct ieee80211_hw *hw,
945 struct ieee80211_sta *sta, bool set)
946 {
947 struct brcms_info *wl = hw->priv;
948 struct sk_buff *beacon = NULL;
949 u16 tim_offset = 0;
950
951 spin_lock_bh(&wl->lock);
952 if (wl->wlc->vif)
953 beacon = ieee80211_beacon_get_tim(hw, wl->wlc->vif,
954 &tim_offset, NULL);
955 if (beacon)
956 brcms_c_set_new_beacon(wl->wlc, beacon, tim_offset,
957 wl->wlc->vif->bss_conf.dtim_period);
958 spin_unlock_bh(&wl->lock);
959
960 return 0;
961 }
962
963 static const struct ieee80211_ops brcms_ops = {
964 .tx = brcms_ops_tx,
965 .start = brcms_ops_start,
966 .stop = brcms_ops_stop,
967 .add_interface = brcms_ops_add_interface,
968 .remove_interface = brcms_ops_remove_interface,
969 .config = brcms_ops_config,
970 .bss_info_changed = brcms_ops_bss_info_changed,
971 .configure_filter = brcms_ops_configure_filter,
972 .sw_scan_start = brcms_ops_sw_scan_start,
973 .sw_scan_complete = brcms_ops_sw_scan_complete,
974 .conf_tx = brcms_ops_conf_tx,
975 .sta_add = brcms_ops_sta_add,
976 .ampdu_action = brcms_ops_ampdu_action,
977 .rfkill_poll = brcms_ops_rfkill_poll,
978 .flush = brcms_ops_flush,
979 .get_tsf = brcms_ops_get_tsf,
980 .set_tsf = brcms_ops_set_tsf,
981 .set_tim = brcms_ops_beacon_set_tim,
982 };
983
brcms_dpc(struct tasklet_struct * t)984 void brcms_dpc(struct tasklet_struct *t)
985 {
986 struct brcms_info *wl;
987
988 wl = from_tasklet(wl, t, tasklet);
989
990 spin_lock_bh(&wl->lock);
991
992 /* call the common second level interrupt handler */
993 if (wl->pub->up) {
994 if (wl->resched) {
995 unsigned long flags;
996
997 spin_lock_irqsave(&wl->isr_lock, flags);
998 brcms_c_intrsupd(wl->wlc);
999 spin_unlock_irqrestore(&wl->isr_lock, flags);
1000 }
1001
1002 wl->resched = brcms_c_dpc(wl->wlc, true);
1003 }
1004
1005 /* brcms_c_dpc() may bring the driver down */
1006 if (!wl->pub->up)
1007 goto done;
1008
1009 /* re-schedule dpc */
1010 if (wl->resched)
1011 tasklet_schedule(&wl->tasklet);
1012 else
1013 /* re-enable interrupts */
1014 brcms_intrson(wl);
1015
1016 done:
1017 spin_unlock_bh(&wl->lock);
1018 wake_up(&wl->tx_flush_wq);
1019 }
1020
brcms_isr(int irq,void * dev_id)1021 static irqreturn_t brcms_isr(int irq, void *dev_id)
1022 {
1023 struct brcms_info *wl;
1024 irqreturn_t ret = IRQ_NONE;
1025
1026 wl = (struct brcms_info *) dev_id;
1027
1028 spin_lock(&wl->isr_lock);
1029
1030 /* call common first level interrupt handler */
1031 if (brcms_c_isr(wl->wlc)) {
1032 /* schedule second level handler */
1033 tasklet_schedule(&wl->tasklet);
1034 ret = IRQ_HANDLED;
1035 }
1036
1037 spin_unlock(&wl->isr_lock);
1038
1039 return ret;
1040 }
1041
1042 /*
1043 * is called in brcms_pci_probe() context, therefore no locking required.
1044 */
ieee_hw_rate_init(struct ieee80211_hw * hw)1045 static int ieee_hw_rate_init(struct ieee80211_hw *hw)
1046 {
1047 struct brcms_info *wl = hw->priv;
1048 struct brcms_c_info *wlc = wl->wlc;
1049 struct ieee80211_supported_band *band;
1050 int has_5g = 0;
1051 u16 phy_type;
1052
1053 hw->wiphy->bands[NL80211_BAND_2GHZ] = NULL;
1054 hw->wiphy->bands[NL80211_BAND_5GHZ] = NULL;
1055
1056 phy_type = brcms_c_get_phy_type(wl->wlc, 0);
1057 if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
1058 band = &wlc->bandstate[BAND_2G_INDEX]->band;
1059 *band = brcms_band_2GHz_nphy_template;
1060 if (phy_type == PHY_TYPE_LCN) {
1061 /* Single stream */
1062 band->ht_cap.mcs.rx_mask[1] = 0;
1063 band->ht_cap.mcs.rx_highest = cpu_to_le16(72);
1064 }
1065 hw->wiphy->bands[NL80211_BAND_2GHZ] = band;
1066 } else {
1067 return -EPERM;
1068 }
1069
1070 /* Assume all bands use the same phy. True for 11n devices. */
1071 if (wl->pub->_nbands > 1) {
1072 has_5g++;
1073 if (phy_type == PHY_TYPE_N || phy_type == PHY_TYPE_LCN) {
1074 band = &wlc->bandstate[BAND_5G_INDEX]->band;
1075 *band = brcms_band_5GHz_nphy_template;
1076 hw->wiphy->bands[NL80211_BAND_5GHZ] = band;
1077 } else {
1078 return -EPERM;
1079 }
1080 }
1081 return 0;
1082 }
1083
1084 /*
1085 * is called in brcms_pci_probe() context, therefore no locking required.
1086 */
ieee_hw_init(struct ieee80211_hw * hw)1087 static int ieee_hw_init(struct ieee80211_hw *hw)
1088 {
1089 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1090 ieee80211_hw_set(hw, SIGNAL_DBM);
1091 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
1092
1093 hw->extra_tx_headroom = brcms_c_get_header_len();
1094 hw->queues = N_TX_QUEUES;
1095 hw->max_rates = 2; /* Primary rate and 1 fallback rate */
1096
1097 /* channel change time is dependent on chip and band */
1098 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1099 BIT(NL80211_IFTYPE_AP) |
1100 BIT(NL80211_IFTYPE_ADHOC);
1101
1102 /*
1103 * deactivate sending probe responses by ucude, because this will
1104 * cause problems when WPS is used.
1105 *
1106 * hw->wiphy->flags |= WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD;
1107 */
1108
1109 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1110
1111 hw->rate_control_algorithm = "minstrel_ht";
1112
1113 hw->sta_data_size = 0;
1114 return ieee_hw_rate_init(hw);
1115 }
1116
1117 /*
1118 * attach to the WL device.
1119 *
1120 * Attach to the WL device identified by vendor and device parameters.
1121 * regs is a host accessible memory address pointing to WL device registers.
1122 *
1123 * is called in brcms_bcma_probe() context, therefore no locking required.
1124 */
brcms_attach(struct bcma_device * pdev)1125 static struct brcms_info *brcms_attach(struct bcma_device *pdev)
1126 {
1127 struct brcms_info *wl = NULL;
1128 int unit, err;
1129 struct ieee80211_hw *hw;
1130 u8 perm[ETH_ALEN];
1131
1132 unit = n_adapters_found;
1133 err = 0;
1134
1135 if (unit < 0)
1136 return NULL;
1137
1138 /* allocate private info */
1139 hw = bcma_get_drvdata(pdev);
1140 if (hw != NULL)
1141 wl = hw->priv;
1142 if (WARN_ON(hw == NULL) || WARN_ON(wl == NULL))
1143 return NULL;
1144 wl->wiphy = hw->wiphy;
1145
1146 atomic_set(&wl->callbacks, 0);
1147
1148 init_waitqueue_head(&wl->tx_flush_wq);
1149
1150 /* setup the bottom half handler */
1151 tasklet_setup(&wl->tasklet, brcms_dpc);
1152
1153 spin_lock_init(&wl->lock);
1154 spin_lock_init(&wl->isr_lock);
1155
1156 /* common load-time initialization */
1157 wl->wlc = brcms_c_attach((void *)wl, pdev, unit, false, &err);
1158 if (!wl->wlc) {
1159 wiphy_err(wl->wiphy, "%s: attach() failed with code %d\n",
1160 KBUILD_MODNAME, err);
1161 goto fail;
1162 }
1163 wl->pub = brcms_c_pub(wl->wlc);
1164
1165 wl->pub->ieee_hw = hw;
1166
1167 /* register our interrupt handler */
1168 if (request_irq(pdev->irq, brcms_isr,
1169 IRQF_SHARED, KBUILD_MODNAME, wl)) {
1170 wiphy_err(wl->wiphy, "wl%d: request_irq() failed\n", unit);
1171 goto fail;
1172 }
1173 wl->irq = pdev->irq;
1174
1175 /* register module */
1176 brcms_c_module_register(wl->pub, "linux", wl, NULL);
1177
1178 if (ieee_hw_init(hw)) {
1179 wiphy_err(wl->wiphy, "wl%d: %s: ieee_hw_init failed!\n", unit,
1180 __func__);
1181 goto fail;
1182 }
1183
1184 brcms_c_regd_init(wl->wlc);
1185
1186 memcpy(perm, &wl->pub->cur_etheraddr, ETH_ALEN);
1187 if (WARN_ON(!is_valid_ether_addr(perm)))
1188 goto fail;
1189 SET_IEEE80211_PERM_ADDR(hw, perm);
1190
1191 err = ieee80211_register_hw(hw);
1192 if (err)
1193 wiphy_err(wl->wiphy, "%s: ieee80211_register_hw failed, status"
1194 "%d\n", __func__, err);
1195
1196 if (wl->pub->srom_ccode[0] &&
1197 regulatory_hint(wl->wiphy, wl->pub->srom_ccode))
1198 wiphy_err(wl->wiphy, "%s: regulatory hint failed\n", __func__);
1199
1200 brcms_debugfs_attach(wl->pub);
1201 brcms_debugfs_create_files(wl->pub);
1202 n_adapters_found++;
1203 return wl;
1204
1205 fail:
1206 brcms_free(wl);
1207 return NULL;
1208 }
1209
1210
1211
1212 /*
1213 * determines if a device is a WL device, and if so, attaches it.
1214 *
1215 * This function determines if a device pointed to by pdev is a WL device,
1216 * and if so, performs a brcms_attach() on it.
1217 *
1218 * Perimeter lock is initialized in the course of this function.
1219 */
brcms_bcma_probe(struct bcma_device * pdev)1220 static int brcms_bcma_probe(struct bcma_device *pdev)
1221 {
1222 struct brcms_info *wl;
1223 struct ieee80211_hw *hw;
1224
1225 dev_info(&pdev->dev, "mfg %x core %x rev %d class %d irq %d\n",
1226 pdev->id.manuf, pdev->id.id, pdev->id.rev, pdev->id.class,
1227 pdev->irq);
1228
1229 if ((pdev->id.manuf != BCMA_MANUF_BCM) ||
1230 (pdev->id.id != BCMA_CORE_80211))
1231 return -ENODEV;
1232
1233 hw = ieee80211_alloc_hw(sizeof(struct brcms_info), &brcms_ops);
1234 if (!hw) {
1235 pr_err("%s: ieee80211_alloc_hw failed\n", __func__);
1236 return -ENOMEM;
1237 }
1238
1239 SET_IEEE80211_DEV(hw, &pdev->dev);
1240
1241 bcma_set_drvdata(pdev, hw);
1242
1243 memset(hw->priv, 0, sizeof(*wl));
1244
1245 wl = brcms_attach(pdev);
1246 if (!wl) {
1247 pr_err("%s: brcms_attach failed!\n", __func__);
1248 return -ENODEV;
1249 }
1250 brcms_led_register(wl);
1251
1252 return 0;
1253 }
1254
brcms_suspend(struct bcma_device * pdev)1255 static int brcms_suspend(struct bcma_device *pdev)
1256 {
1257 struct brcms_info *wl;
1258 struct ieee80211_hw *hw;
1259
1260 hw = bcma_get_drvdata(pdev);
1261 wl = hw->priv;
1262 if (!wl) {
1263 pr_err("%s: %s: no driver private struct!\n", KBUILD_MODNAME,
1264 __func__);
1265 return -ENODEV;
1266 }
1267
1268 /* only need to flag hw is down for proper resume */
1269 spin_lock_bh(&wl->lock);
1270 wl->pub->hw_up = false;
1271 spin_unlock_bh(&wl->lock);
1272
1273 brcms_dbg_info(wl->wlc->hw->d11core, "brcms_suspend ok\n");
1274
1275 return 0;
1276 }
1277
brcms_resume(struct bcma_device * pdev)1278 static int brcms_resume(struct bcma_device *pdev)
1279 {
1280 return 0;
1281 }
1282
1283 static struct bcma_driver brcms_bcma_driver = {
1284 .name = KBUILD_MODNAME,
1285 .probe = brcms_bcma_probe,
1286 .suspend = brcms_suspend,
1287 .resume = brcms_resume,
1288 .remove = brcms_remove,
1289 .id_table = brcms_coreid_table,
1290 };
1291
1292 /*
1293 * This is the main entry point for the brcmsmac driver.
1294 *
1295 * This function is scheduled upon module initialization and
1296 * does the driver registration, which result in brcms_bcma_probe()
1297 * call resulting in the driver bringup.
1298 */
brcms_driver_init(struct work_struct * work)1299 static void brcms_driver_init(struct work_struct *work)
1300 {
1301 int error;
1302
1303 error = bcma_driver_register(&brcms_bcma_driver);
1304 if (error)
1305 pr_err("%s: register returned %d\n", __func__, error);
1306 }
1307
1308 static DECLARE_WORK(brcms_driver_work, brcms_driver_init);
1309
brcms_module_init(void)1310 static int __init brcms_module_init(void)
1311 {
1312 brcms_debugfs_init();
1313 if (!schedule_work(&brcms_driver_work))
1314 return -EBUSY;
1315
1316 return 0;
1317 }
1318
1319 /*
1320 * This function unloads the brcmsmac driver from the system.
1321 *
1322 * This function unconditionally unloads the brcmsmac driver module from the
1323 * system.
1324 *
1325 */
brcms_module_exit(void)1326 static void __exit brcms_module_exit(void)
1327 {
1328 cancel_work_sync(&brcms_driver_work);
1329 bcma_driver_unregister(&brcms_bcma_driver);
1330 brcms_debugfs_exit();
1331 }
1332
1333 module_init(brcms_module_init);
1334 module_exit(brcms_module_exit);
1335
1336 /*
1337 * precondition: perimeter lock has been acquired
1338 */
brcms_txflowcontrol(struct brcms_info * wl,struct brcms_if * wlif,bool state,int prio)1339 void brcms_txflowcontrol(struct brcms_info *wl, struct brcms_if *wlif,
1340 bool state, int prio)
1341 {
1342 brcms_err(wl->wlc->hw->d11core, "Shouldn't be here %s\n", __func__);
1343 }
1344
1345 /*
1346 * precondition: perimeter lock has been acquired
1347 */
brcms_init(struct brcms_info * wl)1348 void brcms_init(struct brcms_info *wl)
1349 {
1350 brcms_dbg_info(wl->wlc->hw->d11core, "Initializing wl%d\n",
1351 wl->pub->unit);
1352 brcms_reset(wl);
1353 brcms_c_init(wl->wlc, wl->mute_tx);
1354 }
1355
1356 /*
1357 * precondition: perimeter lock has been acquired
1358 */
brcms_reset(struct brcms_info * wl)1359 uint brcms_reset(struct brcms_info *wl)
1360 {
1361 brcms_dbg_info(wl->wlc->hw->d11core, "Resetting wl%d\n", wl->pub->unit);
1362 brcms_c_reset(wl->wlc);
1363
1364 /* dpc will not be rescheduled */
1365 wl->resched = false;
1366
1367 /* inform publicly that interface is down */
1368 wl->pub->up = false;
1369
1370 return 0;
1371 }
1372
brcms_fatal_error(struct brcms_info * wl)1373 void brcms_fatal_error(struct brcms_info *wl)
1374 {
1375 brcms_err(wl->wlc->hw->d11core, "wl%d: fatal error, reinitializing\n",
1376 wl->wlc->pub->unit);
1377 brcms_reset(wl);
1378 ieee80211_restart_hw(wl->pub->ieee_hw);
1379 }
1380
1381 /*
1382 * These are interrupt on/off entry points. Disable interrupts
1383 * during interrupt state transition.
1384 */
brcms_intrson(struct brcms_info * wl)1385 void brcms_intrson(struct brcms_info *wl)
1386 {
1387 unsigned long flags;
1388
1389 spin_lock_irqsave(&wl->isr_lock, flags);
1390 brcms_c_intrson(wl->wlc);
1391 spin_unlock_irqrestore(&wl->isr_lock, flags);
1392 }
1393
brcms_intrsoff(struct brcms_info * wl)1394 u32 brcms_intrsoff(struct brcms_info *wl)
1395 {
1396 unsigned long flags;
1397 u32 status;
1398
1399 spin_lock_irqsave(&wl->isr_lock, flags);
1400 status = brcms_c_intrsoff(wl->wlc);
1401 spin_unlock_irqrestore(&wl->isr_lock, flags);
1402 return status;
1403 }
1404
brcms_intrsrestore(struct brcms_info * wl,u32 macintmask)1405 void brcms_intrsrestore(struct brcms_info *wl, u32 macintmask)
1406 {
1407 unsigned long flags;
1408
1409 spin_lock_irqsave(&wl->isr_lock, flags);
1410 brcms_c_intrsrestore(wl->wlc, macintmask);
1411 spin_unlock_irqrestore(&wl->isr_lock, flags);
1412 }
1413
1414 /*
1415 * precondition: perimeter lock has been acquired
1416 */
brcms_up(struct brcms_info * wl)1417 int brcms_up(struct brcms_info *wl)
1418 {
1419 int error = 0;
1420
1421 if (wl->pub->up)
1422 return 0;
1423
1424 error = brcms_c_up(wl->wlc);
1425
1426 return error;
1427 }
1428
1429 /*
1430 * precondition: perimeter lock has been acquired
1431 */
brcms_down(struct brcms_info * wl)1432 void brcms_down(struct brcms_info *wl)
1433 __must_hold(&wl->lock)
1434 {
1435 uint callbacks, ret_val = 0;
1436
1437 /* call common down function */
1438 ret_val = brcms_c_down(wl->wlc);
1439 callbacks = atomic_read(&wl->callbacks) - ret_val;
1440
1441 /* wait for down callbacks to complete */
1442 spin_unlock_bh(&wl->lock);
1443
1444 /* For HIGH_only driver, it's important to actually schedule other work,
1445 * not just spin wait since everything runs at schedule level
1446 */
1447 SPINWAIT((atomic_read(&wl->callbacks) > callbacks), 100 * 1000);
1448
1449 spin_lock_bh(&wl->lock);
1450 }
1451
1452 /*
1453 * precondition: perimeter lock is not acquired
1454 */
_brcms_timer(struct work_struct * work)1455 static void _brcms_timer(struct work_struct *work)
1456 {
1457 struct brcms_timer *t = container_of(work, struct brcms_timer,
1458 dly_wrk.work);
1459
1460 spin_lock_bh(&t->wl->lock);
1461
1462 if (t->set) {
1463 if (t->periodic) {
1464 atomic_inc(&t->wl->callbacks);
1465 ieee80211_queue_delayed_work(t->wl->pub->ieee_hw,
1466 &t->dly_wrk,
1467 msecs_to_jiffies(t->ms));
1468 } else {
1469 t->set = false;
1470 }
1471
1472 t->fn(t->arg);
1473 }
1474
1475 atomic_dec(&t->wl->callbacks);
1476
1477 spin_unlock_bh(&t->wl->lock);
1478 }
1479
1480 /*
1481 * Adds a timer to the list. Caller supplies a timer function.
1482 * Is called from wlc.
1483 *
1484 * precondition: perimeter lock has been acquired
1485 */
brcms_init_timer(struct brcms_info * wl,void (* fn)(void * arg),void * arg,const char * name)1486 struct brcms_timer *brcms_init_timer(struct brcms_info *wl,
1487 void (*fn) (void *arg),
1488 void *arg, const char *name)
1489 {
1490 struct brcms_timer *t;
1491
1492 t = kzalloc(sizeof(struct brcms_timer), GFP_ATOMIC);
1493 if (!t)
1494 return NULL;
1495
1496 INIT_DELAYED_WORK(&t->dly_wrk, _brcms_timer);
1497 t->wl = wl;
1498 t->fn = fn;
1499 t->arg = arg;
1500 t->next = wl->timers;
1501 wl->timers = t;
1502
1503 #ifdef DEBUG
1504 t->name = kstrdup(name, GFP_ATOMIC);
1505 #endif
1506
1507 return t;
1508 }
1509
1510 /*
1511 * adds only the kernel timer since it's going to be more accurate
1512 * as well as it's easier to make it periodic
1513 *
1514 * precondition: perimeter lock has been acquired
1515 */
brcms_add_timer(struct brcms_timer * t,uint ms,int periodic)1516 void brcms_add_timer(struct brcms_timer *t, uint ms, int periodic)
1517 {
1518 struct ieee80211_hw *hw = t->wl->pub->ieee_hw;
1519
1520 #ifdef DEBUG
1521 if (t->set)
1522 brcms_dbg_info(t->wl->wlc->hw->d11core,
1523 "%s: Already set. Name: %s, per %d\n",
1524 __func__, t->name, periodic);
1525 #endif
1526 t->ms = ms;
1527 t->periodic = (bool) periodic;
1528 if (!t->set) {
1529 t->set = true;
1530 atomic_inc(&t->wl->callbacks);
1531 }
1532
1533 ieee80211_queue_delayed_work(hw, &t->dly_wrk, msecs_to_jiffies(ms));
1534 }
1535
1536 /*
1537 * return true if timer successfully deleted, false if still pending
1538 *
1539 * precondition: perimeter lock has been acquired
1540 */
brcms_del_timer(struct brcms_timer * t)1541 bool brcms_del_timer(struct brcms_timer *t)
1542 {
1543 if (t->set) {
1544 t->set = false;
1545 if (!cancel_delayed_work(&t->dly_wrk))
1546 return false;
1547
1548 atomic_dec(&t->wl->callbacks);
1549 }
1550
1551 return true;
1552 }
1553
1554 /*
1555 * precondition: perimeter lock has been acquired
1556 */
brcms_free_timer(struct brcms_timer * t)1557 void brcms_free_timer(struct brcms_timer *t)
1558 {
1559 struct brcms_info *wl = t->wl;
1560 struct brcms_timer *tmp;
1561
1562 /* delete the timer in case it is active */
1563 brcms_del_timer(t);
1564
1565 if (wl->timers == t) {
1566 wl->timers = wl->timers->next;
1567 #ifdef DEBUG
1568 kfree(t->name);
1569 #endif
1570 kfree(t);
1571 return;
1572
1573 }
1574
1575 tmp = wl->timers;
1576 while (tmp) {
1577 if (tmp->next == t) {
1578 tmp->next = t->next;
1579 #ifdef DEBUG
1580 kfree(t->name);
1581 #endif
1582 kfree(t);
1583 return;
1584 }
1585 tmp = tmp->next;
1586 }
1587
1588 }
1589
1590 /*
1591 * precondition: no locking required
1592 */
brcms_ucode_init_buf(struct brcms_info * wl,void ** pbuf,u32 idx)1593 int brcms_ucode_init_buf(struct brcms_info *wl, void **pbuf, u32 idx)
1594 {
1595 int i, entry;
1596 const u8 *pdata;
1597 struct firmware_hdr *hdr;
1598 for (i = 0; i < wl->fw.fw_cnt; i++) {
1599 hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
1600 for (entry = 0; entry < wl->fw.hdr_num_entries[i];
1601 entry++, hdr++) {
1602 u32 len = le32_to_cpu(hdr->len);
1603 if (le32_to_cpu(hdr->idx) == idx) {
1604 pdata = wl->fw.fw_bin[i]->data +
1605 le32_to_cpu(hdr->offset);
1606 *pbuf = kvmalloc(len, GFP_KERNEL);
1607 if (*pbuf == NULL)
1608 goto fail;
1609 memcpy(*pbuf, pdata, len);
1610 return 0;
1611 }
1612 }
1613 }
1614 brcms_err(wl->wlc->hw->d11core,
1615 "ERROR: ucode buf tag:%d can not be found!\n", idx);
1616 *pbuf = NULL;
1617 fail:
1618 return -ENODATA;
1619 }
1620
1621 /*
1622 * Precondition: Since this function is called in brcms_bcma_probe() context,
1623 * no locking is required.
1624 */
brcms_ucode_init_uint(struct brcms_info * wl,size_t * n_bytes,u32 idx)1625 int brcms_ucode_init_uint(struct brcms_info *wl, size_t *n_bytes, u32 idx)
1626 {
1627 int i, entry;
1628 const u8 *pdata;
1629 struct firmware_hdr *hdr;
1630 for (i = 0; i < wl->fw.fw_cnt; i++) {
1631 hdr = (struct firmware_hdr *)wl->fw.fw_hdr[i]->data;
1632 for (entry = 0; entry < wl->fw.hdr_num_entries[i];
1633 entry++, hdr++) {
1634 if (le32_to_cpu(hdr->idx) == idx) {
1635 pdata = wl->fw.fw_bin[i]->data +
1636 le32_to_cpu(hdr->offset);
1637 if (le32_to_cpu(hdr->len) != 4) {
1638 brcms_err(wl->wlc->hw->d11core,
1639 "ERROR: fw hdr len\n");
1640 return -ENOMSG;
1641 }
1642 *n_bytes = le32_to_cpu(*((__le32 *) pdata));
1643 return 0;
1644 }
1645 }
1646 }
1647 brcms_err(wl->wlc->hw->d11core,
1648 "ERROR: ucode tag:%d can not be found!\n", idx);
1649 return -ENOMSG;
1650 }
1651
1652 /*
1653 * precondition: can both be called locked and unlocked
1654 */
brcms_ucode_free_buf(void * p)1655 void brcms_ucode_free_buf(void *p)
1656 {
1657 kvfree(p);
1658 }
1659
1660 /*
1661 * checks validity of all firmware images loaded from user space
1662 *
1663 * Precondition: Since this function is called in brcms_bcma_probe() context,
1664 * no locking is required.
1665 */
brcms_check_firmwares(struct brcms_info * wl)1666 int brcms_check_firmwares(struct brcms_info *wl)
1667 {
1668 int i;
1669 int entry;
1670 int rc = 0;
1671 const struct firmware *fw;
1672 const struct firmware *fw_hdr;
1673 struct firmware_hdr *ucode_hdr;
1674 for (i = 0; i < MAX_FW_IMAGES && rc == 0; i++) {
1675 fw = wl->fw.fw_bin[i];
1676 fw_hdr = wl->fw.fw_hdr[i];
1677 if (fw == NULL && fw_hdr == NULL) {
1678 break;
1679 } else if (fw == NULL || fw_hdr == NULL) {
1680 wiphy_err(wl->wiphy, "%s: invalid bin/hdr fw\n",
1681 __func__);
1682 rc = -EBADF;
1683 } else if (fw_hdr->size % sizeof(struct firmware_hdr)) {
1684 wiphy_err(wl->wiphy, "%s: non integral fw hdr file "
1685 "size %zu/%zu\n", __func__, fw_hdr->size,
1686 sizeof(struct firmware_hdr));
1687 rc = -EBADF;
1688 } else if (fw->size < MIN_FW_SIZE || fw->size > MAX_FW_SIZE) {
1689 wiphy_err(wl->wiphy, "%s: out of bounds fw file size %zu\n",
1690 __func__, fw->size);
1691 rc = -EBADF;
1692 } else {
1693 /* check if ucode section overruns firmware image */
1694 ucode_hdr = (struct firmware_hdr *)fw_hdr->data;
1695 for (entry = 0; entry < wl->fw.hdr_num_entries[i] &&
1696 !rc; entry++, ucode_hdr++) {
1697 if (le32_to_cpu(ucode_hdr->offset) +
1698 le32_to_cpu(ucode_hdr->len) >
1699 fw->size) {
1700 wiphy_err(wl->wiphy,
1701 "%s: conflicting bin/hdr\n",
1702 __func__);
1703 rc = -EBADF;
1704 }
1705 }
1706 }
1707 }
1708 if (rc == 0 && wl->fw.fw_cnt != i) {
1709 wiphy_err(wl->wiphy, "%s: invalid fw_cnt=%d\n", __func__,
1710 wl->fw.fw_cnt);
1711 rc = -EBADF;
1712 }
1713 return rc;
1714 }
1715
1716 /*
1717 * precondition: perimeter lock has been acquired
1718 */
brcms_rfkill_set_hw_state(struct brcms_info * wl)1719 bool brcms_rfkill_set_hw_state(struct brcms_info *wl)
1720 __must_hold(&wl->lock)
1721 {
1722 bool blocked = brcms_c_check_radio_disabled(wl->wlc);
1723
1724 spin_unlock_bh(&wl->lock);
1725 wiphy_rfkill_set_hw_state(wl->pub->ieee_hw->wiphy, blocked);
1726 if (blocked)
1727 wiphy_rfkill_start_polling(wl->pub->ieee_hw->wiphy);
1728 spin_lock_bh(&wl->lock);
1729 return blocked;
1730 }
1731
