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