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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 <linux/types.h>
19#include <linux/ath9k_platform.h>
20#include "hw.h"
21
22enum ath_bt_mode {
23 ATH_BT_COEX_MODE_LEGACY, /* legacy rx_clear mode */
24 ATH_BT_COEX_MODE_UNSLOTTED, /* untimed/unslotted mode */
25 ATH_BT_COEX_MODE_SLOTTED, /* slotted mode */
26 ATH_BT_COEX_MODE_DISABLED, /* coexistence disabled */
27};
28
29struct ath_btcoex_config {
30 u8 bt_time_extend;
31 bool bt_txstate_extend;
32 bool bt_txframe_extend;
33 enum ath_bt_mode bt_mode; /* coexistence mode */
34 bool bt_quiet_collision;
35 bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
36 u8 bt_priority_time;
37 u8 bt_first_slot_time;
38 bool bt_hold_rx_clear;
39 u8 wl_active_time;
40 u8 wl_qc_time;
41};
42
43static const u32 ar9003_wlan_weights[ATH_BTCOEX_STOMP_MAX]
44 [AR9300_NUM_WLAN_WEIGHTS] = {
45 { 0xfffffff0, 0xfffffff0, 0xfffffff0, 0xfffffff0 }, /* STOMP_ALL */
46 { 0x88888880, 0x88888880, 0x88888880, 0x88888880 }, /* STOMP_LOW */
47 { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* STOMP_NONE */
48};
49
50static const u32 mci_wlan_weights[ATH_BTCOEX_STOMP_MAX]
51 [AR9300_NUM_WLAN_WEIGHTS] = {
52 { 0x01017d01, 0x41414101, 0x41414101, 0x41414141 }, /* STOMP_ALL */
53 { 0x01017d01, 0x3b3b3b01, 0x3b3b3b01, 0x3b3b3b3b }, /* STOMP_LOW */
54 { 0x01017d01, 0x01010101, 0x01010101, 0x01010101 }, /* STOMP_NONE */
55 { 0x01017d01, 0x013b0101, 0x3b3b0101, 0x3b3b013b }, /* STOMP_LOW_FTP */
56 { 0xffffff01, 0xffffffff, 0xffffff01, 0xffffffff }, /* STOMP_AUDIO */
57};
58
59void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
60{
61 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
62 const struct ath_btcoex_config ath_bt_config = {
63 .bt_time_extend = 0,
64 .bt_txstate_extend = true,
65 .bt_txframe_extend = true,
66 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
67 .bt_quiet_collision = true,
68 .bt_rxclear_polarity = true,
69 .bt_priority_time = 2,
70 .bt_first_slot_time = 5,
71 .bt_hold_rx_clear = true,
72 .wl_active_time = 0x20,
73 .wl_qc_time = 0x20,
74 };
75 bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
76 u8 time_extend = ath_bt_config.bt_time_extend;
77 u8 first_slot_time = ath_bt_config.bt_first_slot_time;
78
79 if (AR_SREV_9300_20_OR_LATER(ah))
80 rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
81
82 if (AR_SREV_SOC(ah)) {
83 first_slot_time = 0x1d;
84 time_extend = 0xa;
85
86 btcoex_hw->bt_coex_mode3 =
87 SM(ath_bt_config.wl_active_time, AR_BT_WL_ACTIVE_TIME) |
88 SM(ath_bt_config.wl_qc_time, AR_BT_WL_QC_TIME);
89
90 btcoex_hw->bt_coex_mode2 =
91 AR_BT_PROTECT_BT_AFTER_WAKEUP |
92 AR_BT_PHY_ERR_BT_COLL_ENABLE;
93 }
94
95 btcoex_hw->bt_coex_mode =
96 (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
97 SM(time_extend, AR_BT_TIME_EXTEND) |
98 SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
99 SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
100 SM(ath_bt_config.bt_mode, AR_BT_MODE) |
101 SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
102 SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
103 SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
104 SM(first_slot_time, AR_BT_FIRST_SLOT_TIME) |
105 SM(qnum, AR_BT_QCU_THRESH);
106
107 btcoex_hw->bt_coex_mode2 |=
108 SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
109 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
110 AR_BT_DISABLE_BT_ANT;
111}
112EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
113
114static void ath9k_hw_btcoex_pin_init(struct ath_hw *ah, u8 wlanactive_gpio,
115 u8 btactive_gpio, u8 btpriority_gpio)
116{
117 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
118 struct ath9k_platform_data *pdata = ah->dev->platform_data;
119
120 if (btcoex_hw->scheme != ATH_BTCOEX_CFG_2WIRE &&
121 btcoex_hw->scheme != ATH_BTCOEX_CFG_3WIRE)
122 return;
123
124 /* bt priority GPIO will be ignored by 2 wire scheme */
125 if (pdata && (pdata->bt_active_pin || pdata->bt_priority_pin ||
126 pdata->wlan_active_pin)) {
127 btcoex_hw->btactive_gpio = pdata->bt_active_pin;
128 btcoex_hw->wlanactive_gpio = pdata->wlan_active_pin;
129 btcoex_hw->btpriority_gpio = pdata->bt_priority_pin;
130 } else {
131 btcoex_hw->btactive_gpio = btactive_gpio;
132 btcoex_hw->wlanactive_gpio = wlanactive_gpio;
133 btcoex_hw->btpriority_gpio = btpriority_gpio;
134 }
135}
136
137void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
138{
139 struct ath_common *common = ath9k_hw_common(ah);
140 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
141
142 /*
143 * Check if BTCOEX is globally disabled.
144 */
145 if (!common->btcoex_enabled) {
146 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
147 return;
148 }
149
150 if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI) {
151 btcoex_hw->scheme = ATH_BTCOEX_CFG_MCI;
152 } else if (AR_SREV_9300_20_OR_LATER(ah)) {
153 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
154
155 ath9k_hw_btcoex_pin_init(ah, ATH_WLANACTIVE_GPIO_9300,
156 ATH_BTACTIVE_GPIO_9300,
157 ATH_BTPRIORITY_GPIO_9300);
158 } else if (AR_SREV_9280_20_OR_LATER(ah)) {
159 if (AR_SREV_9285(ah))
160 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
161 else
162 btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
163
164 ath9k_hw_btcoex_pin_init(ah, ATH_WLANACTIVE_GPIO_9280,
165 ATH_BTACTIVE_GPIO_9280,
166 ATH_BTPRIORITY_GPIO_9285);
167 }
168}
169EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
170
171void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
172{
173 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
174
175 /* connect bt_active to baseband */
176 REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL(ah),
177 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
178 AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
179
180 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL(ah),
181 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
182
183 /* Set input mux for bt_active to gpio pin */
184 if (!AR_SREV_SOC(ah))
185 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1(ah),
186 AR_GPIO_INPUT_MUX1_BT_ACTIVE,
187 btcoex_hw->btactive_gpio);
188
189 /* Configure the desired gpio port for input */
190 ath9k_hw_gpio_request_in(ah, btcoex_hw->btactive_gpio,
191 "ath9k-btactive");
192}
193EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
194
195void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
196{
197 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
198
199 /* btcoex 3-wire */
200 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL(ah),
201 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
202 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
203
204 /* Set input mux for bt_prority_async and
205 * bt_active_async to GPIO pins */
206 if (!AR_SREV_SOC(ah)) {
207 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1(ah),
208 AR_GPIO_INPUT_MUX1_BT_ACTIVE,
209 btcoex_hw->btactive_gpio);
210 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1(ah),
211 AR_GPIO_INPUT_MUX1_BT_PRIORITY,
212 btcoex_hw->btpriority_gpio);
213 }
214
215 /* Configure the desired GPIO ports for input */
216 ath9k_hw_gpio_request_in(ah, btcoex_hw->btactive_gpio,
217 "ath9k-btactive");
218 ath9k_hw_gpio_request_in(ah, btcoex_hw->btpriority_gpio,
219 "ath9k-btpriority");
220}
221EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
222
223void ath9k_hw_btcoex_deinit(struct ath_hw *ah)
224{
225 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
226
227 ath9k_hw_gpio_free(ah, btcoex_hw->btactive_gpio);
228 ath9k_hw_gpio_free(ah, btcoex_hw->btpriority_gpio);
229 ath9k_hw_gpio_free(ah, btcoex_hw->wlanactive_gpio);
230}
231EXPORT_SYMBOL(ath9k_hw_btcoex_deinit);
232
233void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
234{
235 ah->btcoex_hw.mci.ready = false;
236 ah->btcoex_hw.mci.bt_state = 0;
237 ah->btcoex_hw.mci.bt_ver_major = 3;
238 ah->btcoex_hw.mci.bt_ver_minor = 0;
239 ah->btcoex_hw.mci.bt_version_known = false;
240 ah->btcoex_hw.mci.update_2g5g = true;
241 ah->btcoex_hw.mci.is_2g = true;
242 ah->btcoex_hw.mci.wlan_channels_update = false;
243 ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
244 ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
245 ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
246 ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
247 ah->btcoex_hw.mci.query_bt = true;
248 ah->btcoex_hw.mci.unhalt_bt_gpm = true;
249 ah->btcoex_hw.mci.halted_bt_gpm = false;
250 ah->btcoex_hw.mci.need_flush_btinfo = false;
251 ah->btcoex_hw.mci.wlan_cal_seq = 0;
252 ah->btcoex_hw.mci.wlan_cal_done = 0;
253 ah->btcoex_hw.mci.config = (AR_SREV_9462(ah)) ? 0x2201 : 0xa4c1;
254}
255EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
256
257static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
258{
259 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
260
261 /* Configure the desired GPIO port for TX_FRAME output */
262 ath9k_hw_gpio_request_out(ah, btcoex_hw->wlanactive_gpio,
263 "ath9k-wlanactive",
264 AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
265}
266
267/*
268 * For AR9002, bt_weight/wlan_weight are used.
269 * For AR9003 and above, stomp_type is used.
270 */
271void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
272 u32 bt_weight,
273 u32 wlan_weight,
274 enum ath_stomp_type stomp_type)
275{
276 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
277 struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
278 u8 txprio_shift[] = { 24, 16, 16, 0 }; /* tx priority weight */
279 bool concur_tx = (mci_hw->concur_tx && btcoex_hw->tx_prio[stomp_type]);
280 const u32 *weight = ar9003_wlan_weights[stomp_type];
281 int i;
282
283 if (!AR_SREV_9300_20_OR_LATER(ah)) {
284 btcoex_hw->bt_coex_weights =
285 SM(bt_weight, AR_BTCOEX_BT_WGHT) |
286 SM(wlan_weight, AR_BTCOEX_WL_WGHT);
287 return;
288 }
289
290 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
291 enum ath_stomp_type stype =
292 ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
293 btcoex_hw->mci.stomp_ftp) ?
294 ATH_BTCOEX_STOMP_LOW_FTP : stomp_type;
295 weight = mci_wlan_weights[stype];
296 }
297
298 for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
299 btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
300 btcoex_hw->wlan_weight[i] = weight[i];
301 if (concur_tx && i) {
302 btcoex_hw->wlan_weight[i] &=
303 ~(0xff << txprio_shift[i-1]);
304 btcoex_hw->wlan_weight[i] |=
305 (btcoex_hw->tx_prio[stomp_type] <<
306 txprio_shift[i-1]);
307 }
308 }
309
310 /* Last WLAN weight has to be adjusted wrt tx priority */
311 if (concur_tx) {
312 btcoex_hw->wlan_weight[i-1] &= ~(0xff << txprio_shift[i-1]);
313 btcoex_hw->wlan_weight[i-1] |= (btcoex_hw->tx_prio[stomp_type]
314 << txprio_shift[i-1]);
315 }
316}
317EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
318
319
320static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
321{
322 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
323 u32 val;
324 int i;
325
326 /*
327 * Program coex mode and weight registers to
328 * enable coex 3-wire
329 */
330 if (AR_SREV_SOC(ah))
331 REG_CLR_BIT(ah, AR_BT_COEX_MODE2, AR_BT_PHY_ERR_BT_COLL_ENABLE);
332
333 REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
334 REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
335
336 if (AR_SREV_SOC(ah))
337 REG_WRITE(ah, AR_BT_COEX_MODE3, btcoex->bt_coex_mode3);
338
339 if (AR_SREV_9300_20_OR_LATER(ah)) {
340 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
341 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
342 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
343 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
344 btcoex->bt_weight[i]);
345 } else
346 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
347
348 if (AR_SREV_9271(ah)) {
349 val = REG_READ(ah, 0x50040);
350 val &= 0xFFFFFEFF;
351 REG_WRITE(ah, 0x50040, val);
352 }
353
354 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
355 REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
356
357 ath9k_hw_gpio_request_out(ah, btcoex->wlanactive_gpio,
358 "ath9k-wlanactive",
359 AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
360}
361
362static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
363{
364 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
365 int i;
366
367 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
368 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
369 btcoex->wlan_weight[i]);
370
371 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
372 btcoex->enabled = true;
373}
374
375static void ath9k_hw_btcoex_disable_mci(struct ath_hw *ah)
376{
377 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
378 int i;
379
380 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
381
382 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
383 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
384 btcoex_hw->wlan_weight[i]);
385}
386
387void ath9k_hw_btcoex_enable(struct ath_hw *ah)
388{
389 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
390
391 switch (ath9k_hw_get_btcoex_scheme(ah)) {
392 case ATH_BTCOEX_CFG_NONE:
393 return;
394 case ATH_BTCOEX_CFG_2WIRE:
395 ath9k_hw_btcoex_enable_2wire(ah);
396 break;
397 case ATH_BTCOEX_CFG_3WIRE:
398 ath9k_hw_btcoex_enable_3wire(ah);
399 break;
400 case ATH_BTCOEX_CFG_MCI:
401 ath9k_hw_btcoex_enable_mci(ah);
402 break;
403 }
404
405 if (ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_MCI &&
406 !AR_SREV_SOC(ah)) {
407 REG_RMW(ah, AR_GPIO_PDPU(ah),
408 (0x2 << (btcoex_hw->btactive_gpio * 2)),
409 (0x3 << (btcoex_hw->btactive_gpio * 2)));
410 }
411
412 ah->btcoex_hw.enabled = true;
413}
414EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
415
416void ath9k_hw_btcoex_disable(struct ath_hw *ah)
417{
418 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
419 int i;
420
421 btcoex_hw->enabled = false;
422
423 if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_MCI) {
424 ath9k_hw_btcoex_disable_mci(ah);
425 return;
426 }
427
428 if (!AR_SREV_9300_20_OR_LATER(ah))
429 ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
430
431 ath9k_hw_gpio_request_out(ah, btcoex_hw->wlanactive_gpio,
432 NULL, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
433
434 if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
435 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
436 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
437
438 if (AR_SREV_9300_20_OR_LATER(ah)) {
439 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
440 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
441 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
442 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
443 } else
444 REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
445
446 }
447}
448EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
449
450/*
451 * Configures appropriate weight based on stomp type.
452 */
453void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
454 enum ath_stomp_type stomp_type)
455{
456 if (AR_SREV_9300_20_OR_LATER(ah)) {
457 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
458 return;
459 }
460
461 switch (stomp_type) {
462 case ATH_BTCOEX_STOMP_ALL:
463 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
464 AR_STOMP_ALL_WLAN_WGHT, 0);
465 break;
466 case ATH_BTCOEX_STOMP_LOW:
467 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
468 AR_STOMP_LOW_WLAN_WGHT, 0);
469 break;
470 case ATH_BTCOEX_STOMP_NONE:
471 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
472 AR_STOMP_NONE_WLAN_WGHT, 0);
473 break;
474 default:
475 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
476 break;
477 }
478}
479EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
480
481void ath9k_hw_btcoex_set_concur_txprio(struct ath_hw *ah, u8 *stomp_txprio)
482{
483 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
484 int i;
485
486 for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
487 btcoex->tx_prio[i] = stomp_txprio[i];
488}
489EXPORT_SYMBOL(ath9k_hw_btcoex_set_concur_txprio);
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
20enum 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
27struct 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
39static 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
46static const u32 mci_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 { 0xffffff01, 0xffffffff, 0xffffff01, 0xffffffff }, /* STOMP_AUDIO */
53};
54
55void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
56{
57 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
58 const struct ath_btcoex_config ath_bt_config = {
59 .bt_time_extend = 0,
60 .bt_txstate_extend = true,
61 .bt_txframe_extend = true,
62 .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
63 .bt_quiet_collision = true,
64 .bt_rxclear_polarity = true,
65 .bt_priority_time = 2,
66 .bt_first_slot_time = 5,
67 .bt_hold_rx_clear = true,
68 };
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}
91EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
92
93void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
94{
95 struct ath_common *common = ath9k_hw_common(ah);
96 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
97
98 /*
99 * Check if BTCOEX is globally disabled.
100 */
101 if (!common->btcoex_enabled) {
102 btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
103 return;
104 }
105
106 if (AR_SREV_9300_20_OR_LATER(ah)) {
107 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
108 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9300;
109 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9300;
110 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9300;
111 } else if (AR_SREV_9280_20_OR_LATER(ah)) {
112 btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9280;
113 btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9280;
114
115 if (AR_SREV_9285(ah)) {
116 btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
117 btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9285;
118 } else {
119 btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
120 }
121 }
122}
123EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
124
125void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
126{
127 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
128
129 /* connect bt_active to baseband */
130 REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
131 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
132 AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
133
134 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
135 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
136
137 /* Set input mux for bt_active to gpio pin */
138 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
139 AR_GPIO_INPUT_MUX1_BT_ACTIVE,
140 btcoex_hw->btactive_gpio);
141
142 /* Configure the desired gpio port for input */
143 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
144}
145EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
146
147void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
148{
149 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
150
151 /* btcoex 3-wire */
152 REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
153 (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
154 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
155
156 /* Set input mux for bt_prority_async and
157 * bt_active_async to GPIO pins */
158 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
159 AR_GPIO_INPUT_MUX1_BT_ACTIVE,
160 btcoex_hw->btactive_gpio);
161
162 REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
163 AR_GPIO_INPUT_MUX1_BT_PRIORITY,
164 btcoex_hw->btpriority_gpio);
165
166 /* Configure the desired GPIO ports for input */
167
168 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
169 ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
170}
171EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
172
173void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
174{
175 ah->btcoex_hw.mci.ready = false;
176 ah->btcoex_hw.mci.bt_state = 0;
177 ah->btcoex_hw.mci.bt_ver_major = 3;
178 ah->btcoex_hw.mci.bt_ver_minor = 0;
179 ah->btcoex_hw.mci.bt_version_known = false;
180 ah->btcoex_hw.mci.update_2g5g = true;
181 ah->btcoex_hw.mci.is_2g = true;
182 ah->btcoex_hw.mci.wlan_channels_update = false;
183 ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
184 ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
185 ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
186 ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
187 ah->btcoex_hw.mci.query_bt = true;
188 ah->btcoex_hw.mci.unhalt_bt_gpm = true;
189 ah->btcoex_hw.mci.halted_bt_gpm = false;
190 ah->btcoex_hw.mci.need_flush_btinfo = false;
191 ah->btcoex_hw.mci.wlan_cal_seq = 0;
192 ah->btcoex_hw.mci.wlan_cal_done = 0;
193 ah->btcoex_hw.mci.config = (AR_SREV_9462(ah)) ? 0x2201 : 0xa4c1;
194}
195EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
196
197static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
198{
199 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
200
201 /* Configure the desired GPIO port for TX_FRAME output */
202 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
203 AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
204}
205
206/*
207 * For AR9002, bt_weight/wlan_weight are used.
208 * For AR9003 and above, stomp_type is used.
209 */
210void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
211 u32 bt_weight,
212 u32 wlan_weight,
213 enum ath_stomp_type stomp_type)
214{
215 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
216 struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
217 u8 txprio_shift[] = { 24, 16, 16, 0 }; /* tx priority weight */
218 bool concur_tx = (mci_hw->concur_tx && btcoex_hw->tx_prio[stomp_type]);
219 const u32 *weight = ar9003_wlan_weights[stomp_type];
220 int i;
221
222 if (!AR_SREV_9300_20_OR_LATER(ah)) {
223 btcoex_hw->bt_coex_weights =
224 SM(bt_weight, AR_BTCOEX_BT_WGHT) |
225 SM(wlan_weight, AR_BTCOEX_WL_WGHT);
226 return;
227 }
228
229 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
230 enum ath_stomp_type stype =
231 ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
232 btcoex_hw->mci.stomp_ftp) ?
233 ATH_BTCOEX_STOMP_LOW_FTP : stomp_type;
234 weight = mci_wlan_weights[stype];
235 }
236
237 for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
238 btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
239 btcoex_hw->wlan_weight[i] = weight[i];
240 if (concur_tx && i) {
241 btcoex_hw->wlan_weight[i] &=
242 ~(0xff << txprio_shift[i-1]);
243 btcoex_hw->wlan_weight[i] |=
244 (btcoex_hw->tx_prio[stomp_type] <<
245 txprio_shift[i-1]);
246 }
247 }
248 /* Last WLAN weight has to be adjusted wrt tx priority */
249 if (concur_tx) {
250 btcoex_hw->wlan_weight[i-1] &= ~(0xff << txprio_shift[i-1]);
251 btcoex_hw->wlan_weight[i-1] |= (btcoex_hw->tx_prio[stomp_type]
252 << txprio_shift[i-1]);
253 }
254
255}
256EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
257
258
259static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
260{
261 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
262 u32 val;
263 int i;
264
265 /*
266 * Program coex mode and weight registers to
267 * enable coex 3-wire
268 */
269 REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
270 REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
271
272
273 if (AR_SREV_9300_20_OR_LATER(ah)) {
274 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
275 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
276 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
277 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
278 btcoex->bt_weight[i]);
279 } else
280 REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
281
282
283
284 if (AR_SREV_9271(ah)) {
285 val = REG_READ(ah, 0x50040);
286 val &= 0xFFFFFEFF;
287 REG_WRITE(ah, 0x50040, val);
288 }
289
290 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
291 REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
292
293 ath9k_hw_cfg_output(ah, btcoex->wlanactive_gpio,
294 AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
295}
296
297static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
298{
299 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
300 int i;
301
302 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
303 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
304 btcoex->wlan_weight[i]);
305
306 REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
307 btcoex->enabled = true;
308}
309
310void ath9k_hw_btcoex_enable(struct ath_hw *ah)
311{
312 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
313
314 switch (ath9k_hw_get_btcoex_scheme(ah)) {
315 case ATH_BTCOEX_CFG_NONE:
316 return;
317 case ATH_BTCOEX_CFG_2WIRE:
318 ath9k_hw_btcoex_enable_2wire(ah);
319 break;
320 case ATH_BTCOEX_CFG_3WIRE:
321 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
322 ath9k_hw_btcoex_enable_mci(ah);
323 return;
324 }
325 ath9k_hw_btcoex_enable_3wire(ah);
326 break;
327 }
328
329 REG_RMW(ah, AR_GPIO_PDPU,
330 (0x2 << (btcoex_hw->btactive_gpio * 2)),
331 (0x3 << (btcoex_hw->btactive_gpio * 2)));
332
333 ah->btcoex_hw.enabled = true;
334}
335EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
336
337void ath9k_hw_btcoex_disable(struct ath_hw *ah)
338{
339 struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
340 int i;
341
342 btcoex_hw->enabled = false;
343 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
344 ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
345 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
346 REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
347 btcoex_hw->wlan_weight[i]);
348 return;
349 }
350 ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
351
352 ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
353 AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
354
355 if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
356 REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
357 REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
358
359 if (AR_SREV_9300_20_OR_LATER(ah)) {
360 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
361 REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
362 for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
363 REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
364 } else
365 REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
366
367 }
368}
369EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
370
371/*
372 * Configures appropriate weight based on stomp type.
373 */
374void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
375 enum ath_stomp_type stomp_type)
376{
377 if (AR_SREV_9300_20_OR_LATER(ah)) {
378 ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
379 return;
380 }
381
382 switch (stomp_type) {
383 case ATH_BTCOEX_STOMP_ALL:
384 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
385 AR_STOMP_ALL_WLAN_WGHT, 0);
386 break;
387 case ATH_BTCOEX_STOMP_LOW:
388 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
389 AR_STOMP_LOW_WLAN_WGHT, 0);
390 break;
391 case ATH_BTCOEX_STOMP_NONE:
392 ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
393 AR_STOMP_NONE_WLAN_WGHT, 0);
394 break;
395 default:
396 ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
397 break;
398 }
399}
400EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
401
402void ath9k_hw_btcoex_set_concur_txprio(struct ath_hw *ah, u8 *stomp_txprio)
403{
404 struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
405 int i;
406
407 for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
408 btcoex->tx_prio[i] = stomp_txprio[i];
409}
410EXPORT_SYMBOL(ath9k_hw_btcoex_set_concur_txprio);