sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / net / wireless / ath / ath9k / gpio.c
blob0349b3a1cc58c8dcb29729f0237f9d4137e8de46
1 /*
2 * Copyright (c) 2008-2009 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
52 sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
55 /* Configure gpio 1 for output */
56 ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
57 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
58 /* LED off, active low */
59 ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
61 if (!led_blink)
62 sc->led_cdev.default_trigger =
63 ieee80211_get_radio_led_name(sc->hw);
65 snprintf(sc->led_name, sizeof(sc->led_name),
66 "ath9k-%s", wiphy_name(sc->hw->wiphy));
67 sc->led_cdev.name = sc->led_name;
68 sc->led_cdev.brightness_set = ath_led_brightness;
70 ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
71 if (ret < 0)
72 return;
74 sc->led_registered = true;
76 #endif
78 /*******************/
79 /* Rfkill */
80 /*******************/
82 static bool ath_is_rfkill_set(struct ath_softc *sc)
84 struct ath_hw *ah = sc->sc_ah;
86 return ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
87 ah->rfkill_polarity;
90 void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
92 struct ath_softc *sc = hw->priv;
93 bool blocked = !!ath_is_rfkill_set(sc);
95 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
98 void ath_start_rfkill_poll(struct ath_softc *sc)
100 struct ath_hw *ah = sc->sc_ah;
102 if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
103 wiphy_rfkill_start_polling(sc->hw->wiphy);
106 /******************/
107 /* BTCOEX */
108 /******************/
111 * Detects if there is any priority bt traffic
113 static void ath_detect_bt_priority(struct ath_softc *sc)
115 struct ath_btcoex *btcoex = &sc->btcoex;
116 struct ath_hw *ah = sc->sc_ah;
118 if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
119 btcoex->bt_priority_cnt++;
121 if (time_after(jiffies, btcoex->bt_priority_time +
122 msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
123 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);
124 /* Detect if colocated bt started scanning */
125 if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
126 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
127 "BT scan detected\n");
128 sc->sc_flags |= (SC_OP_BT_SCAN |
129 SC_OP_BT_PRIORITY_DETECTED);
130 } else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
131 ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
132 "BT priority traffic detected\n");
133 sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED;
136 btcoex->bt_priority_cnt = 0;
137 btcoex->bt_priority_time = jiffies;
141 static void ath9k_gen_timer_start(struct ath_hw *ah,
142 struct ath_gen_timer *timer,
143 u32 trig_timeout,
144 u32 timer_period)
146 ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period);
148 if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
149 ath9k_hw_disable_interrupts(ah);
150 ah->imask |= ATH9K_INT_GENTIMER;
151 ath9k_hw_set_interrupts(ah, ah->imask);
155 static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
157 struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
159 ath9k_hw_gen_timer_stop(ah, timer);
161 /* if no timer is enabled, turn off interrupt mask */
162 if (timer_table->timer_mask.val == 0) {
163 ath9k_hw_disable_interrupts(ah);
164 ah->imask &= ~ATH9K_INT_GENTIMER;
165 ath9k_hw_set_interrupts(ah, ah->imask);
170 * This is the master bt coex timer which runs for every
171 * 45ms, bt traffic will be given priority during 55% of this
172 * period while wlan gets remaining 45%
174 static void ath_btcoex_period_timer(unsigned long data)
176 struct ath_softc *sc = (struct ath_softc *) data;
177 struct ath_hw *ah = sc->sc_ah;
178 struct ath_btcoex *btcoex = &sc->btcoex;
179 u32 timer_period;
180 bool is_btscan;
182 ath9k_ps_wakeup(sc);
183 ath_detect_bt_priority(sc);
185 is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
187 spin_lock_bh(&btcoex->btcoex_lock);
189 ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL :
190 btcoex->bt_stomp_type);
192 spin_unlock_bh(&btcoex->btcoex_lock);
194 if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
195 if (btcoex->hw_timer_enabled)
196 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
198 timer_period = is_btscan ? btcoex->btscan_no_stomp :
199 btcoex->btcoex_no_stomp;
200 ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period,
201 timer_period * 10);
202 btcoex->hw_timer_enabled = true;
205 ath9k_ps_restore(sc);
206 mod_timer(&btcoex->period_timer, jiffies +
207 msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD));
211 * Generic tsf based hw timer which configures weight
212 * registers to time slice between wlan and bt traffic
214 static void ath_btcoex_no_stomp_timer(void *arg)
216 struct ath_softc *sc = (struct ath_softc *)arg;
217 struct ath_hw *ah = sc->sc_ah;
218 struct ath_btcoex *btcoex = &sc->btcoex;
219 struct ath_common *common = ath9k_hw_common(ah);
220 bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
222 ath_dbg(common, ATH_DBG_BTCOEX,
223 "no stomp timer running\n");
225 ath9k_ps_wakeup(sc);
226 spin_lock_bh(&btcoex->btcoex_lock);
228 if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan)
229 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
230 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
231 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
233 spin_unlock_bh(&btcoex->btcoex_lock);
234 ath9k_ps_restore(sc);
237 int ath_init_btcoex_timer(struct ath_softc *sc)
239 struct ath_btcoex *btcoex = &sc->btcoex;
241 btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
242 btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
243 btcoex->btcoex_period / 100;
244 btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
245 btcoex->btcoex_period / 100;
247 setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
248 (unsigned long) sc);
250 spin_lock_init(&btcoex->btcoex_lock);
252 btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
253 ath_btcoex_no_stomp_timer,
254 ath_btcoex_no_stomp_timer,
255 (void *) sc, AR_FIRST_NDP_TIMER);
257 if (!btcoex->no_stomp_timer)
258 return -ENOMEM;
260 return 0;
264 * (Re)start btcoex timers
266 void ath9k_btcoex_timer_resume(struct ath_softc *sc)
268 struct ath_btcoex *btcoex = &sc->btcoex;
269 struct ath_hw *ah = sc->sc_ah;
271 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
272 "Starting btcoex timers\n");
274 /* make sure duty cycle timer is also stopped when resuming */
275 if (btcoex->hw_timer_enabled)
276 ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
278 btcoex->bt_priority_cnt = 0;
279 btcoex->bt_priority_time = jiffies;
280 sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);
282 mod_timer(&btcoex->period_timer, jiffies);
287 * Pause btcoex timer and bt duty cycle timer
289 void ath9k_btcoex_timer_pause(struct ath_softc *sc)
291 struct ath_btcoex *btcoex = &sc->btcoex;
292 struct ath_hw *ah = sc->sc_ah;
294 del_timer_sync(&btcoex->period_timer);
296 if (btcoex->hw_timer_enabled)
297 ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
299 btcoex->hw_timer_enabled = false;