ath9k_hw: make ath9k_hw_set_interrupts use ah->imask by default
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / ath / ath9k / gpio.c
blob61eee8c49a1492ae0de877ae2fcef04956e6e66c
1 /*
2 * Copyright (c) 2008-2011 Atheros Communications Inc.
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.
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.
17 #include "ath9k.h"
19 /********************************/
20 /* LED functions */
21 /********************************/
23 #ifdef CONFIG_MAC80211_LEDS
24 static void ath_led_brightness(struct led_classdev *led_cdev,
25 enum led_brightness brightness)
27 struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
28 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
31 void ath_deinit_leds(struct ath_softc *sc)
33 if (!sc->led_registered)
34 return;
36 ath_led_brightness(&sc->led_cdev, LED_OFF);
37 led_classdev_unregister(&sc->led_cdev);
40 void ath_init_leds(struct ath_softc *sc)
42 int ret;
44 if (sc->sc_ah->led_pin < 0) {
45 if (AR_SREV_9287(sc->sc_ah))
46 sc->sc_ah->led_pin = ATH_LED_PIN_9287;
47 else if (AR_SREV_9485(sc->sc_ah))
48 sc->sc_ah->led_pin = ATH_LED_PIN_9485;
49 else if (AR_SREV_9300(sc->sc_ah))
50 sc->sc_ah->led_pin = ATH_LED_PIN_9300;
51 else if (AR_SREV_9480(sc->sc_ah))
52 sc->sc_ah->led_pin = ATH_LED_PIN_9480;
53 else
54 sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
57 /* Configure gpio 1 for output */
58 ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
59 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
60 /* LED off, active low */
61 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
63 if (!led_blink)
64 sc->led_cdev.default_trigger =
65 ieee80211_get_radio_led_name(sc->hw);
67 snprintf(sc->led_name, sizeof(sc->led_name),
68 "ath9k-%s", wiphy_name(sc->hw->wiphy));
69 sc->led_cdev.name = sc->led_name;
70 sc->led_cdev.brightness_set = ath_led_brightness;
72 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
73 if (ret < 0)
74 return;
76 sc->led_registered = true;
78 #endif
80 /*******************/
81 /* Rfkill */
82 /*******************/
84 static bool ath_is_rfkill_set(struct ath_softc *sc)
86 struct ath_hw *ah = sc->sc_ah;
87 bool is_blocked;
89 ath9k_ps_wakeup(sc);
90 is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
91 ah->rfkill_polarity;
92 ath9k_ps_restore(sc);
94 return is_blocked;
97 void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
99 struct ath_softc *sc = hw->priv;
100 bool blocked = !!ath_is_rfkill_set(sc);
102 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
105 void ath_start_rfkill_poll(struct ath_softc *sc)
107 struct ath_hw *ah = sc->sc_ah;
109 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
110 wiphy_rfkill_start_polling(sc->hw->wiphy);
113 /******************/
114 /* BTCOEX */
115 /******************/
118 * Detects if there is any priority bt traffic
120 static void ath_detect_bt_priority(struct ath_softc *sc)
122 struct ath_btcoex *btcoex = &sc->btcoex;
123 struct ath_hw *ah = sc->sc_ah;
125 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
126 btcoex->bt_priority_cnt++;
128 if (time_after(jiffies, btcoex->bt_priority_time +
129 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
130 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);
131 /* Detect if colocated bt started scanning */
132 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
133 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
134 "BT scan detected\n");
135 sc->sc_flags |= (SC_OP_BT_SCAN |
136 SC_OP_BT_PRIORITY_DETECTED);
137 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
138 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
139 "BT priority traffic detected\n");
140 sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED;
143 btcoex->bt_priority_cnt = 0;
144 btcoex->bt_priority_time = jiffies;
148 static void ath9k_gen_timer_start(struct ath_hw *ah,
149 struct ath_gen_timer *timer,
150 u32 trig_timeout,
151 u32 timer_period)
153 ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period);
155 if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
156 ath9k_hw_disable_interrupts(ah);
157 ah->imask |= ATH9K_INT_GENTIMER;
158 ath9k_hw_set_interrupts(ah);
159 ath9k_hw_enable_interrupts(ah);
163 static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
165 struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
167 ath9k_hw_gen_timer_stop(ah, timer);
169 /* if no timer is enabled, turn off interrupt mask */
170 if (timer_table->timer_mask.val == 0) {
171 ath9k_hw_disable_interrupts(ah);
172 ah->imask &= ~ATH9K_INT_GENTIMER;
173 ath9k_hw_set_interrupts(ah);
174 ath9k_hw_enable_interrupts(ah);
179 * This is the master bt coex timer which runs for every
180 * 45ms, bt traffic will be given priority during 55% of this
181 * period while wlan gets remaining 45%
183 static void ath_btcoex_period_timer(unsigned long data)
185 struct ath_softc *sc = (struct ath_softc *) data;
186 struct ath_hw *ah = sc->sc_ah;
187 struct ath_btcoex *btcoex = &sc->btcoex;
188 u32 timer_period;
189 bool is_btscan;
191 ath9k_ps_wakeup(sc);
192 ath_detect_bt_priority(sc);
194 is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
196 spin_lock_bh(&btcoex->btcoex_lock);
198 ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL :
199 btcoex->bt_stomp_type);
201 spin_unlock_bh(&btcoex->btcoex_lock);
203 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
204 if (btcoex->hw_timer_enabled)
205 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
207 timer_period = is_btscan ? btcoex->btscan_no_stomp :
208 btcoex->btcoex_no_stomp;
209 ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period,
210 timer_period * 10);
211 btcoex->hw_timer_enabled = true;
214 ath9k_ps_restore(sc);
215 mod_timer(&btcoex->period_timer, jiffies +
216 msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD));
220 * Generic tsf based hw timer which configures weight
221 * registers to time slice between wlan and bt traffic
223 static void ath_btcoex_no_stomp_timer(void *arg)
225 struct ath_softc *sc = (struct ath_softc *)arg;
226 struct ath_hw *ah = sc->sc_ah;
227 struct ath_btcoex *btcoex = &sc->btcoex;
228 struct ath_common *common = ath9k_hw_common(ah);
229 bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
231 ath_dbg(common, ATH_DBG_BTCOEX,
232 "no stomp timer running\n");
234 ath9k_ps_wakeup(sc);
235 spin_lock_bh(&btcoex->btcoex_lock);
237 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan)
238 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
239 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
240 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
242 spin_unlock_bh(&btcoex->btcoex_lock);
243 ath9k_ps_restore(sc);
246 int ath_init_btcoex_timer(struct ath_softc *sc)
248 struct ath_btcoex *btcoex = &sc->btcoex;
250 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
251 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
252 btcoex->btcoex_period / 100;
253 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
254 btcoex->btcoex_period / 100;
256 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
257 (unsigned long) sc);
259 spin_lock_init(&btcoex->btcoex_lock);
261 btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
262 ath_btcoex_no_stomp_timer,
263 ath_btcoex_no_stomp_timer,
264 (void *) sc, AR_FIRST_NDP_TIMER);
266 if (!btcoex->no_stomp_timer)
267 return -ENOMEM;
269 return 0;
273 * (Re)start btcoex timers
275 void ath9k_btcoex_timer_resume(struct ath_softc *sc)
277 struct ath_btcoex *btcoex = &sc->btcoex;
278 struct ath_hw *ah = sc->sc_ah;
280 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
281 "Starting btcoex timers\n");
283 /* make sure duty cycle timer is also stopped when resuming */
284 if (btcoex->hw_timer_enabled)
285 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
287 btcoex->bt_priority_cnt = 0;
288 btcoex->bt_priority_time = jiffies;
289 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);
291 mod_timer(&btcoex->period_timer, jiffies);
296 * Pause btcoex timer and bt duty cycle timer
298 void ath9k_btcoex_timer_pause(struct ath_softc *sc)
300 struct ath_btcoex *btcoex = &sc->btcoex;
301 struct ath_hw *ah = sc->sc_ah;
303 del_timer_sync(&btcoex->period_timer);
305 if (btcoex->hw_timer_enabled)
306 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
308 btcoex->hw_timer_enabled = false;