2 * Copyright (c) 2009-2011 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 <linux/export.h>
21 ATH_BT_COEX_MODE_LEGACY, /* legacy rx_clear mode */
22 ATH_BT_COEX_MODE_UNSLOTTED, /* untimed/unslotted mode */
23 ATH_BT_COEX_MODE_SLOTTED, /* slotted mode */
24 ATH_BT_COEX_MODE_DISALBED, /* coexistence disabled */
27 struct ath_btcoex_config {
29 bool bt_txstate_extend;
30 bool bt_txframe_extend;
31 enum ath_bt_mode bt_mode; /* coexistence mode */
32 bool bt_quiet_collision;
33 bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
35 u8 bt_first_slot_time;
36 bool bt_hold_rx_clear;
40 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
42 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
43 const struct ath_btcoex_config ath_bt_config = {
45 .bt_txstate_extend = true,
46 .bt_txframe_extend = true,
47 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
48 .bt_quiet_collision = true,
49 .bt_rxclear_polarity = true,
50 .bt_priority_time = 2,
51 .bt_first_slot_time = 5,
52 .bt_hold_rx_clear = true,
55 bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
57 if (AR_SREV_9300_20_OR_LATER(ah))
58 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
60 btcoex_hw->bt_coex_mode =
61 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
62 SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) |
63 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
64 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
65 SM(ath_bt_config.bt_mode, AR_BT_MODE) |
66 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
67 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
68 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
69 SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) |
70 SM(qnum, AR_BT_QCU_THRESH);
72 btcoex_hw->bt_coex_mode2 =
73 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
74 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
77 for (i = 0; i < 32; i++) {
78 idx = (debruijn32 << i) >> 27;
79 ah->hw_gen_timers.gen_timer_index[idx] = i;
82 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
84 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
86 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
88 /* connect bt_active to baseband */
89 REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
90 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
91 AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
93 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
94 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
96 /* Set input mux for bt_active to gpio pin */
97 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
98 AR_GPIO_INPUT_MUX1_BT_ACTIVE,
99 btcoex_hw->btactive_gpio);
101 /* Configure the desired gpio port for input */
102 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
104 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
106 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
108 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
111 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
112 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
113 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
115 /* Set input mux for bt_prority_async and
116 * bt_active_async to GPIO pins */
117 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
118 AR_GPIO_INPUT_MUX1_BT_ACTIVE,
119 btcoex_hw->btactive_gpio);
121 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
122 AR_GPIO_INPUT_MUX1_BT_PRIORITY,
123 btcoex_hw->btpriority_gpio);
125 /* Configure the desired GPIO ports for input */
127 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
128 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
130 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
132 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
134 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
136 /* Configure the desired GPIO port for TX_FRAME output */
137 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
138 AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
141 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
145 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
147 btcoex_hw->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
148 SM(wlan_weight, AR_BTCOEX_WL_WGHT);
150 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
153 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
155 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
159 * Program coex mode and weight registers to
162 REG_WRITE(ah, AR_BT_COEX_MODE, btcoex_hw->bt_coex_mode);
163 REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex_hw->bt_coex_mode2);
166 if (AR_SREV_9300_20_OR_LATER(ah)) {
167 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, ah->bt_coex_wlan_weight[0]);
168 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, ah->bt_coex_wlan_weight[1]);
169 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, ah->bt_coex_bt_weight[0]);
170 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, ah->bt_coex_bt_weight[1]);
171 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, ah->bt_coex_bt_weight[2]);
172 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, ah->bt_coex_bt_weight[3]);
175 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex_hw->bt_coex_weights);
179 if (AR_SREV_9271(ah)) {
180 val = REG_READ(ah, 0x50040);
182 REG_WRITE(ah, 0x50040, val);
185 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
186 REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
188 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
189 AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
192 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
194 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
196 switch (btcoex_hw->scheme) {
197 case ATH_BTCOEX_CFG_NONE:
199 case ATH_BTCOEX_CFG_2WIRE:
200 ath9k_hw_btcoex_enable_2wire(ah);
202 case ATH_BTCOEX_CFG_3WIRE:
203 ath9k_hw_btcoex_enable_3wire(ah);
207 REG_RMW(ah, AR_GPIO_PDPU,
208 (0x2 << (btcoex_hw->btactive_gpio * 2)),
209 (0x3 << (btcoex_hw->btactive_gpio * 2)));
211 ah->btcoex_hw.enabled = true;
213 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
215 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
217 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
219 ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
221 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
222 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
224 if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
225 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
226 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
228 if (AR_SREV_9300_20_OR_LATER(ah)) {
229 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
230 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
231 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, 0);
232 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, 0);
233 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, 0);
234 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, 0);
236 REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
240 ah->btcoex_hw.enabled = false;
242 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
244 static void ar9003_btcoex_bt_stomp(struct ath_hw *ah,
245 enum ath_stomp_type stomp_type)
247 ah->bt_coex_bt_weight[0] = AR9300_BT_WGHT;
248 ah->bt_coex_bt_weight[1] = AR9300_BT_WGHT;
249 ah->bt_coex_bt_weight[2] = AR9300_BT_WGHT;
250 ah->bt_coex_bt_weight[3] = AR9300_BT_WGHT;
253 switch (stomp_type) {
254 case ATH_BTCOEX_STOMP_ALL:
255 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_ALL_WLAN_WGHT0;
256 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_ALL_WLAN_WGHT1;
258 case ATH_BTCOEX_STOMP_LOW:
259 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_LOW_WLAN_WGHT0;
260 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_LOW_WLAN_WGHT1;
262 case ATH_BTCOEX_STOMP_NONE:
263 ah->bt_coex_wlan_weight[0] = AR9300_STOMP_NONE_WLAN_WGHT0;
264 ah->bt_coex_wlan_weight[1] = AR9300_STOMP_NONE_WLAN_WGHT1;
268 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
269 "Invalid Stomptype\n");
273 ath9k_hw_btcoex_enable(ah);
277 * Configures appropriate weight based on stomp type.
279 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
280 enum ath_stomp_type stomp_type)
282 if (AR_SREV_9300_20_OR_LATER(ah)) {
283 ar9003_btcoex_bt_stomp(ah, stomp_type);
287 switch (stomp_type) {
288 case ATH_BTCOEX_STOMP_ALL:
289 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
290 AR_STOMP_ALL_WLAN_WGHT);
292 case ATH_BTCOEX_STOMP_LOW:
293 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
294 AR_STOMP_LOW_WLAN_WGHT);
296 case ATH_BTCOEX_STOMP_NONE:
297 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
298 AR_STOMP_NONE_WLAN_WGHT);
301 ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
302 "Invalid Stomptype\n");
306 ath9k_hw_btcoex_enable(ah);
308 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);