1 /*
2 * Copyright (c) 2010-2011 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include "htc.h"
18
19 /******************/
20 /* BTCOEX */
21 /******************/
22
23 #define ATH_HTC_BTCOEX_PRODUCT_ID "wb193"
24
25 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
26
27 /*
28 * Detects if there is any priority bt traffic
29 */
ath_detect_bt_priority(struct ath9k_htc_priv * priv)30 static void ath_detect_bt_priority(struct ath9k_htc_priv *priv)
31 {
32 struct ath_btcoex *btcoex = &priv->btcoex;
33 struct ath_hw *ah = priv->ah;
34
35 if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio))
36 btcoex->bt_priority_cnt++;
37
38 if (time_after(jiffies, btcoex->bt_priority_time +
39 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
40 clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
41 clear_bit(OP_BT_SCAN, &priv->op_flags);
42 /* Detect if colocated bt started scanning */
43 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
44 ath_dbg(ath9k_hw_common(ah), BTCOEX,
45 "BT scan detected\n");
46 set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
47 set_bit(OP_BT_SCAN, &priv->op_flags);
48 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
49 ath_dbg(ath9k_hw_common(ah), BTCOEX,
50 "BT priority traffic detected\n");
51 set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
52 }
53
54 btcoex->bt_priority_cnt = 0;
55 btcoex->bt_priority_time = jiffies;
56 }
57 }
58
59 /*
60 * This is the master bt coex work which runs for every
61 * 45ms, bt traffic will be given priority during 55% of this
62 * period while wlan gets remaining 45%
63 */
ath_btcoex_period_work(struct work_struct * work)64 static void ath_btcoex_period_work(struct work_struct *work)
65 {
66 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
67 coex_period_work.work);
68 struct ath_btcoex *btcoex = &priv->btcoex;
69 struct ath_common *common = ath9k_hw_common(priv->ah);
70 u32 timer_period;
71 int ret;
72
73 ath_detect_bt_priority(priv);
74
75 ret = ath9k_htc_update_cap_target(priv,
76 test_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags));
77 if (ret) {
78 ath_err(common, "Unable to set BTCOEX parameters\n");
79 return;
80 }
81
82 ath9k_hw_btcoex_bt_stomp(priv->ah, test_bit(OP_BT_SCAN, &priv->op_flags) ?
83 ATH_BTCOEX_STOMP_ALL : btcoex->bt_stomp_type);
84
85 ath9k_hw_btcoex_enable(priv->ah);
86 timer_period = test_bit(OP_BT_SCAN, &priv->op_flags) ?
87 btcoex->btscan_no_stomp : btcoex->btcoex_no_stomp;
88 ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work,
89 msecs_to_jiffies(timer_period));
90 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work,
91 msecs_to_jiffies(btcoex->btcoex_period));
92 }
93
94 /*
95 * Work to time slice between wlan and bt traffic and
96 * configure weight registers
97 */
ath_btcoex_duty_cycle_work(struct work_struct * work)98 static void ath_btcoex_duty_cycle_work(struct work_struct *work)
99 {
100 struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
101 duty_cycle_work.work);
102 struct ath_hw *ah = priv->ah;
103 struct ath_btcoex *btcoex = &priv->btcoex;
104 struct ath_common *common = ath9k_hw_common(ah);
105
106 ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n");
107
108 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||
109 test_bit(OP_BT_SCAN, &priv->op_flags))
110 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
111 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
112 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
113
114 ath9k_hw_btcoex_enable(priv->ah);
115 }
116
ath_htc_init_btcoex_work(struct ath9k_htc_priv * priv)117 static void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)
118 {
119 struct ath_btcoex *btcoex = &priv->btcoex;
120
121 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
122 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
123 btcoex->btcoex_period / 100;
124 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
125 btcoex->btcoex_period / 100;
126 INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work);
127 INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work);
128 }
129
130 /*
131 * (Re)start btcoex work
132 */
133
ath_htc_resume_btcoex_work(struct ath9k_htc_priv * priv)134 static void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
135 {
136 struct ath_btcoex *btcoex = &priv->btcoex;
137 struct ath_hw *ah = priv->ah;
138
139 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n");
140
141 btcoex->bt_priority_cnt = 0;
142 btcoex->bt_priority_time = jiffies;
143 clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
144 clear_bit(OP_BT_SCAN, &priv->op_flags);
145 ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0);
146 }
147
148
149 /*
150 * Cancel btcoex and bt duty cycle work.
151 */
ath_htc_cancel_btcoex_work(struct ath9k_htc_priv * priv)152 static void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv)
153 {
154 cancel_delayed_work_sync(&priv->coex_period_work);
155 cancel_delayed_work_sync(&priv->duty_cycle_work);
156 }
157
ath9k_htc_start_btcoex(struct ath9k_htc_priv * priv)158 void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv)
159 {
160 struct ath_hw *ah = priv->ah;
161
162 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) {
163 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
164 AR_STOMP_LOW_WLAN_WGHT, 0);
165 ath9k_hw_btcoex_enable(ah);
166 ath_htc_resume_btcoex_work(priv);
167 }
168 }
169
ath9k_htc_stop_btcoex(struct ath9k_htc_priv * priv)170 void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv)
171 {
172 struct ath_hw *ah = priv->ah;
173
174 if (ah->btcoex_hw.enabled &&
175 ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
176 if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
177 ath_htc_cancel_btcoex_work(priv);
178 ath9k_hw_btcoex_disable(ah);
179 }
180 }
181
ath9k_htc_init_btcoex(struct ath9k_htc_priv * priv,char * product)182 void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product)
183 {
184 struct ath_hw *ah = priv->ah;
185 struct ath_common *common = ath9k_hw_common(ah);
186 int qnum;
187
188 /*
189 * Check if BTCOEX is globally disabled.
190 */
191 if (!common->btcoex_enabled) {
192 ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_NONE;
193 return;
194 }
195
196 if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) {
197 ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE;
198 }
199
200 switch (ath9k_hw_get_btcoex_scheme(priv->ah)) {
201 case ATH_BTCOEX_CFG_NONE:
202 break;
203 case ATH_BTCOEX_CFG_3WIRE:
204 priv->ah->btcoex_hw.btactive_gpio = 7;
205 priv->ah->btcoex_hw.btpriority_gpio = 6;
206 priv->ah->btcoex_hw.wlanactive_gpio = 8;
207 priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
208 ath9k_hw_btcoex_init_3wire(priv->ah);
209 ath_htc_init_btcoex_work(priv);
210 qnum = priv->hwq_map[IEEE80211_AC_BE];
211 ath9k_hw_init_btcoex_hw(priv->ah, qnum);
212 break;
213 default:
214 WARN_ON(1);
215 break;
216 }
217 }
218
219 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
220
221 /*******/
222 /* LED */
223 /*******/
224
225 #ifdef CONFIG_MAC80211_LEDS
ath9k_led_work(struct work_struct * work)226 void ath9k_led_work(struct work_struct *work)
227 {
228 struct ath9k_htc_priv *priv = container_of(work,
229 struct ath9k_htc_priv,
230 led_work);
231
232 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,
233 (priv->brightness == LED_OFF));
234 }
235
ath9k_led_brightness(struct led_classdev * led_cdev,enum led_brightness brightness)236 static void ath9k_led_brightness(struct led_classdev *led_cdev,
237 enum led_brightness brightness)
238 {
239 struct ath9k_htc_priv *priv = container_of(led_cdev,
240 struct ath9k_htc_priv,
241 led_cdev);
242
243 /* Not locked, but it's just a tiny green light..*/
244 priv->brightness = brightness;
245 ieee80211_queue_work(priv->hw, &priv->led_work);
246 }
247
ath9k_deinit_leds(struct ath9k_htc_priv * priv)248 void ath9k_deinit_leds(struct ath9k_htc_priv *priv)
249 {
250 if (!priv->led_registered)
251 return;
252
253 ath9k_led_brightness(&priv->led_cdev, LED_OFF);
254 led_classdev_unregister(&priv->led_cdev);
255 cancel_work_sync(&priv->led_work);
256
257 ath9k_hw_gpio_free(priv->ah, priv->ah->led_pin);
258 }
259
260
ath9k_configure_leds(struct ath9k_htc_priv * priv)261 void ath9k_configure_leds(struct ath9k_htc_priv *priv)
262 {
263 /* Configure gpio 1 for output */
264 ath9k_hw_gpio_request_out(priv->ah, priv->ah->led_pin,
265 "ath9k-led",
266 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
267 /* LED off, active low */
268 ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1);
269 }
270
ath9k_init_leds(struct ath9k_htc_priv * priv)271 void ath9k_init_leds(struct ath9k_htc_priv *priv)
272 {
273 int ret;
274
275 if (AR_SREV_9287(priv->ah))
276 priv->ah->led_pin = ATH_LED_PIN_9287;
277 else if (AR_SREV_9271(priv->ah))
278 priv->ah->led_pin = ATH_LED_PIN_9271;
279 else if (AR_DEVID_7010(priv->ah))
280 priv->ah->led_pin = ATH_LED_PIN_7010;
281 else
282 priv->ah->led_pin = ATH_LED_PIN_DEF;
283
284 if (!ath9k_htc_led_blink)
285 priv->led_cdev.default_trigger =
286 ieee80211_get_radio_led_name(priv->hw);
287
288 ath9k_configure_leds(priv);
289
290 snprintf(priv->led_name, sizeof(priv->led_name),
291 "ath9k_htc-%s", wiphy_name(priv->hw->wiphy));
292 priv->led_cdev.name = priv->led_name;
293 priv->led_cdev.brightness_set = ath9k_led_brightness;
294
295 ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev);
296 if (ret < 0)
297 return;
298
299 INIT_WORK(&priv->led_work, ath9k_led_work);
300 priv->led_registered = true;
301
302 return;
303 }
304 #endif
305
306 /*******************/
307 /* Rfkill */
308 /*******************/
309
ath_is_rfkill_set(struct ath9k_htc_priv * priv)310 static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv)
311 {
312 bool is_blocked;
313
314 ath9k_htc_ps_wakeup(priv);
315 is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) ==
316 priv->ah->rfkill_polarity;
317 ath9k_htc_ps_restore(priv);
318
319 return is_blocked;
320 }
321
ath9k_htc_rfkill_poll_state(struct ieee80211_hw * hw)322 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw)
323 {
324 struct ath9k_htc_priv *priv = hw->priv;
325 bool blocked = !!ath_is_rfkill_set(priv);
326
327 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
328 }
329
ath9k_start_rfkill_poll(struct ath9k_htc_priv * priv)330 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv)
331 {
332 if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
333 wiphy_rfkill_start_polling(priv->hw->wiphy);
334 }
335
