1 /*
2 * Copyright (c) 2009-2011 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 <linux/export.h>
18 #include "hw.h"
19
20 enum ath_bt_mode {
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_DISABLED, /* coexistence disabled */
25 };
26
27 struct ath_btcoex_config {
28 u8 bt_time_extend;
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*/
34 u8 bt_priority_time;
35 u8 bt_first_slot_time;
36 bool bt_hold_rx_clear;
37 };
38
39 static const u32 ar9003_wlan_weights[ATH_BTCOEX_STOMP_MAX]
40 [AR9300_NUM_WLAN_WEIGHTS] = {
41 { 0xfffffff0, 0xfffffff0, 0xfffffff0, 0xfffffff0 }, /* STOMP_ALL */
42 { 0x88888880, 0x88888880, 0x88888880, 0x88888880 }, /* STOMP_LOW */
43 { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* STOMP_NONE */
44 };
45
46 static const u32 ar9462_wlan_weights[ATH_BTCOEX_STOMP_MAX]
47 [AR9300_NUM_WLAN_WEIGHTS] = {
48 { 0x01017d01, 0x41414101, 0x41414101, 0x41414141 }, /* STOMP_ALL */
49 { 0x01017d01, 0x3b3b3b01, 0x3b3b3b01, 0x3b3b3b3b }, /* STOMP_LOW */
50 { 0x01017d01, 0x01010101, 0x01010101, 0x01010101 }, /* STOMP_NONE */
51 { 0x01017d01, 0x013b0101, 0x3b3b0101, 0x3b3b013b }, /* STOMP_LOW_FTP */
52 };
53
ath9k_hw_init_btcoex_hw(struct ath_hw * ah,int qnum)54 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
55 {
56 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
57 const struct ath_btcoex_config ath_bt_config = {
58 .bt_time_extend = 0,
59 .bt_txstate_extend = true,
60 .bt_txframe_extend = true,
61 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
62 .bt_quiet_collision = true,
63 .bt_rxclear_polarity = true,
64 .bt_priority_time = 2,
65 .bt_first_slot_time = 5,
66 .bt_hold_rx_clear = true,
67 };
68 u32 i, idx;
69 bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
70
71 if (AR_SREV_9300_20_OR_LATER(ah))
72 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
73
74 btcoex_hw->bt_coex_mode =
75 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
76 SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) |
77 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
78 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
79 SM(ath_bt_config.bt_mode, AR_BT_MODE) |
80 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
81 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
82 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
83 SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) |
84 SM(qnum, AR_BT_QCU_THRESH);
85
86 btcoex_hw->bt_coex_mode2 =
87 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
88 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
89 AR_BT_DISABLE_BT_ANT;
90
91 for (i = 0; i < 32; i++) {
92 idx = (debruijn32 << i) >> 27;
93 ah->hw_gen_timers.gen_timer_index[idx] = i;
94 }
95 }
96 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
97
ath9k_hw_btcoex_init_scheme(struct ath_hw * ah)98 void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
99 {
100 struct ath_common *common = ath9k_hw_common(ah);
101 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
102
103 /*
104 * Check if BTCOEX is globally disabled.
105 */
106 if (!common->btcoex_enabled) {
107 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
108 return;
109 }
110
111 if (AR_SREV_9462(ah)) {
112 btcoex_hw->scheme = ATH_BTCOEX_CFG_MCI;
113 } else if (AR_SREV_9300_20_OR_LATER(ah)) {
114 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
115 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9300;
116 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9300;
117 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9300;
118 } else if (AR_SREV_9280_20_OR_LATER(ah)) {
119 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9280;
120 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9280;
121
122 if (AR_SREV_9285(ah)) {
123 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
124 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9285;
125 } else {
126 btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
127 }
128 }
129 }
130 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
131
ath9k_hw_btcoex_init_2wire(struct ath_hw * ah)132 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
133 {
134 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
135
136 /* connect bt_active to baseband */
137 REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
138 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
139 AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
140
141 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
142 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
143
144 /* Set input mux for bt_active to gpio pin */
145 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
146 AR_GPIO_INPUT_MUX1_BT_ACTIVE,
147 btcoex_hw->btactive_gpio);
148
149 /* Configure the desired gpio port for input */
150 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
151 }
152 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
153
ath9k_hw_btcoex_init_3wire(struct ath_hw * ah)154 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
155 {
156 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
157
158 /* btcoex 3-wire */
159 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
160 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
161 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
162
163 /* Set input mux for bt_prority_async and
164 * bt_active_async to GPIO pins */
165 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
166 AR_GPIO_INPUT_MUX1_BT_ACTIVE,
167 btcoex_hw->btactive_gpio);
168
169 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
170 AR_GPIO_INPUT_MUX1_BT_PRIORITY,
171 btcoex_hw->btpriority_gpio);
172
173 /* Configure the desired GPIO ports for input */
174
175 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
176 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
177 }
178 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
179
ath9k_hw_btcoex_init_mci(struct ath_hw * ah)180 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
181 {
182 ah->btcoex_hw.mci.ready = false;
183 ah->btcoex_hw.mci.bt_state = 0;
184 ah->btcoex_hw.mci.bt_ver_major = 3;
185 ah->btcoex_hw.mci.bt_ver_minor = 0;
186 ah->btcoex_hw.mci.bt_version_known = false;
187 ah->btcoex_hw.mci.update_2g5g = true;
188 ah->btcoex_hw.mci.is_2g = true;
189 ah->btcoex_hw.mci.wlan_channels_update = false;
190 ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
191 ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
192 ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
193 ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
194 ah->btcoex_hw.mci.query_bt = true;
195 ah->btcoex_hw.mci.unhalt_bt_gpm = true;
196 ah->btcoex_hw.mci.halted_bt_gpm = false;
197 ah->btcoex_hw.mci.need_flush_btinfo = false;
198 ah->btcoex_hw.mci.wlan_cal_seq = 0;
199 ah->btcoex_hw.mci.wlan_cal_done = 0;
200 ah->btcoex_hw.mci.config = 0x2201;
201 }
202 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
203
ath9k_hw_btcoex_enable_2wire(struct ath_hw * ah)204 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
205 {
206 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
207
208 /* Configure the desired GPIO port for TX_FRAME output */
209 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
210 AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
211 }
212
ath9k_hw_btcoex_set_weight(struct ath_hw * ah,u32 bt_weight,u32 wlan_weight)213 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
214 u32 bt_weight,
215 u32 wlan_weight)
216 {
217 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
218
219 btcoex_hw->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
220 SM(wlan_weight, AR_BTCOEX_WL_WGHT);
221 }
222 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
223
224
ath9k_hw_btcoex_enable_3wire(struct ath_hw * ah)225 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
226 {
227 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
228 u32 val;
229 int i;
230
231 /*
232 * Program coex mode and weight registers to
233 * enable coex 3-wire
234 */
235 REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
236 REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
237
238
239 if (AR_SREV_9300_20_OR_LATER(ah)) {
240 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
241 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
242 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
243 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
244 btcoex->bt_weight[i]);
245 } else
246 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
247
248
249
250 if (AR_SREV_9271(ah)) {
251 val = REG_READ(ah, 0x50040);
252 val &= 0xFFFFFEFF;
253 REG_WRITE(ah, 0x50040, val);
254 }
255
256 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
257 REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
258
259 ath9k_hw_cfg_output(ah, btcoex->wlanactive_gpio,
260 AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
261 }
262
ath9k_hw_btcoex_enable_mci(struct ath_hw * ah)263 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
264 {
265 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
266 int i;
267
268 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
269 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
270 btcoex->wlan_weight[i]);
271
272 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
273 btcoex->enabled = true;
274 }
275
ath9k_hw_btcoex_enable(struct ath_hw * ah)276 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
277 {
278 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
279
280 switch (ath9k_hw_get_btcoex_scheme(ah)) {
281 case ATH_BTCOEX_CFG_NONE:
282 return;
283 case ATH_BTCOEX_CFG_2WIRE:
284 ath9k_hw_btcoex_enable_2wire(ah);
285 break;
286 case ATH_BTCOEX_CFG_3WIRE:
287 ath9k_hw_btcoex_enable_3wire(ah);
288 break;
289 case ATH_BTCOEX_CFG_MCI:
290 ath9k_hw_btcoex_enable_mci(ah);
291 return;
292 }
293
294 REG_RMW(ah, AR_GPIO_PDPU,
295 (0x2 << (btcoex_hw->btactive_gpio * 2)),
296 (0x3 << (btcoex_hw->btactive_gpio * 2)));
297
298 ah->btcoex_hw.enabled = true;
299 }
300 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
301
ath9k_hw_btcoex_disable(struct ath_hw * ah)302 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
303 {
304 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
305 int i;
306
307 btcoex_hw->enabled = false;
308 if (btcoex_hw->scheme == ATH_BTCOEX_CFG_MCI) {
309 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
310 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
311 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
312 btcoex_hw->wlan_weight[i]);
313 }
314 ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
315
316 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
317 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
318
319 if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
320 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
321 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
322
323 if (AR_SREV_9300_20_OR_LATER(ah)) {
324 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
325 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
326 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
327 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
328 } else
329 REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
330
331 }
332 }
333 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
334
ar9003_btcoex_bt_stomp(struct ath_hw * ah,enum ath_stomp_type stomp_type)335 static void ar9003_btcoex_bt_stomp(struct ath_hw *ah,
336 enum ath_stomp_type stomp_type)
337 {
338 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
339 const u32 *weight = AR_SREV_9462(ah) ? ar9003_wlan_weights[stomp_type] :
340 ar9462_wlan_weights[stomp_type];
341 int i;
342
343 for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
344 btcoex->bt_weight[i] = AR9300_BT_WGHT;
345 btcoex->wlan_weight[i] = weight[i];
346 }
347 }
348
349 /*
350 * Configures appropriate weight based on stomp type.
351 */
ath9k_hw_btcoex_bt_stomp(struct ath_hw * ah,enum ath_stomp_type stomp_type)352 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
353 enum ath_stomp_type stomp_type)
354 {
355 if (AR_SREV_9300_20_OR_LATER(ah)) {
356 ar9003_btcoex_bt_stomp(ah, stomp_type);
357 return;
358 }
359
360 switch (stomp_type) {
361 case ATH_BTCOEX_STOMP_ALL:
362 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
363 AR_STOMP_ALL_WLAN_WGHT);
364 break;
365 case ATH_BTCOEX_STOMP_LOW:
366 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
367 AR_STOMP_LOW_WLAN_WGHT);
368 break;
369 case ATH_BTCOEX_STOMP_NONE:
370 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
371 AR_STOMP_NONE_WLAN_WGHT);
372 break;
373 default:
374 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
375 break;
376 }
377 }
378 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
379