1 /*
2  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
3  * Copyright (c) 2002-2005 Atheros Communications, Inc.
4  * Copyright (c) 2008-2010, Atheros Communications Inc.
5  *
6  * Permission to use, copy, modify, and/or distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  *
18  * $FreeBSD$
19  */
20 
21 #include "opt_ah.h"
22 
23 #include "ah.h"
24 #include "ah_internal.h"
25 #include "ah_devid.h"
26 #ifdef	AH_DEBUG
27 #include "ah_desc.h"                    /* NB: for HAL_PHYERR* */
28 #endif
29 
30 #include "ar5416/ar5416.h"
31 #include "ar5416/ar5416reg.h"
32 #include "ar5416/ar5416phy.h"
33 #include "ar5416/ar5416desc.h" /* AR5416_CONTTXMODE */
34 #include "ar5416/ar5416_btcoex.h"
35 
36 void
37 ar5416SetBTCoexInfo(struct ath_hal *ah, HAL_BT_COEX_INFO *btinfo)
38 {
39 	struct ath_hal_5416 *ahp = AH5416(ah);
40 
41 	ahp->ah_btModule = btinfo->bt_module;
42 	ahp->ah_btCoexConfigType = btinfo->bt_coex_config;
43 	ahp->ah_btActiveGpioSelect = btinfo->bt_gpio_bt_active;
44 	ahp->ah_btPriorityGpioSelect = btinfo->bt_gpio_bt_priority;
45 	ahp->ah_wlanActiveGpioSelect = btinfo->bt_gpio_wlan_active;
46 	ahp->ah_btActivePolarity = btinfo->bt_active_polarity;
47 	ahp->ah_btCoexSingleAnt = btinfo->bt_single_ant;
48 	ahp->ah_btWlanIsolation = btinfo->bt_isolation;
49 }
50 
51 void
52 ar5416BTCoexConfig(struct ath_hal *ah, HAL_BT_COEX_CONFIG *btconf)
53 {
54 	struct ath_hal_5416 *ahp = AH5416(ah);
55 	HAL_BOOL rxClearPolarity = btconf->bt_rxclear_polarity;
56 
57 	/*
58 	 * For Kiwi and Osprey, the polarity of rx_clear is active high.
59 	 * The bt_rxclear_polarity flag from ath(4) needs to be inverted.
60 	 */
61 	if (AR_SREV_KIWI(ah)) {
62 		rxClearPolarity = !btconf->bt_rxclear_polarity;
63 	}
64 
65 	ahp->ah_btCoexMode = (ahp->ah_btCoexMode & AR_BT_QCU_THRESH) |
66 	    SM(btconf->bt_time_extend, AR_BT_TIME_EXTEND) |
67 	    SM(btconf->bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
68 	    SM(btconf->bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
69 	    SM(btconf->bt_mode, AR_BT_MODE) |
70 	    SM(btconf->bt_quiet_collision, AR_BT_QUIET) |
71 	    SM(rxClearPolarity, AR_BT_RX_CLEAR_POLARITY) |
72 	    SM(btconf->bt_priority_time, AR_BT_PRIORITY_TIME) |
73 	    SM(btconf->bt_first_slot_time, AR_BT_FIRST_SLOT_TIME);
74 
75 	ahp->ah_btCoexMode2 |= SM(btconf->bt_hold_rxclear,
76 	    AR_BT_HOLD_RX_CLEAR);
77 
78 	if (ahp->ah_btCoexSingleAnt == AH_FALSE) {
79 		/* Enable ACK to go out even though BT has higher priority. */
80 		ahp->ah_btCoexMode2 |= AR_BT_DISABLE_BT_ANT;
81 	}
82 }
83 
84 void
85 ar5416BTCoexSetQcuThresh(struct ath_hal *ah, int qnum)
86 {
87 	struct ath_hal_5416 *ahp = AH5416(ah);
88 
89 	ahp->ah_btCoexMode |= SM(qnum, AR_BT_QCU_THRESH);
90 }
91 
92 void
93 ar5416BTCoexSetWeights(struct ath_hal *ah, u_int32_t stompType)
94 {
95 	struct ath_hal_5416 *ahp = AH5416(ah);
96 
97 	if (AR_SREV_KIWI_10_OR_LATER(ah)) {
98 		/* TODO: TX RX separate is not enabled. */
99 		switch (stompType) {
100 		case HAL_BT_COEX_STOMP_ALL:
101 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
102 			ahp->ah_btCoexWLANWeight = AR5416_STOMP_ALL_WLAN_WGHT;
103 			break;
104 		case HAL_BT_COEX_STOMP_LOW:
105 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
106 			ahp->ah_btCoexWLANWeight = AR5416_STOMP_LOW_WLAN_WGHT;
107 			break;
108 		case HAL_BT_COEX_STOMP_ALL_FORCE:
109 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
110 			ahp->ah_btCoexWLANWeight =
111 			    AR5416_STOMP_ALL_FORCE_WLAN_WGHT;
112 			break;
113 		case HAL_BT_COEX_STOMP_LOW_FORCE:
114 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
115 			ahp->ah_btCoexWLANWeight =
116 			    AR5416_STOMP_LOW_FORCE_WLAN_WGHT;
117 			break;
118 		case HAL_BT_COEX_STOMP_NONE:
119 		case HAL_BT_COEX_NO_STOMP:
120 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
121 			ahp->ah_btCoexWLANWeight = AR5416_STOMP_NONE_WLAN_WGHT;
122 			break;
123 		default:
124 			/* There is a forceWeight from registry */
125 			ahp->ah_btCoexBTWeight = stompType & 0xffff;
126 			ahp->ah_btCoexWLANWeight = stompType >> 16;
127 			break;
128 		}
129 	} else {
130 		switch (stompType) {
131 		case HAL_BT_COEX_STOMP_ALL:
132 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
133 			ahp->ah_btCoexWLANWeight = AR5416_STOMP_ALL_WLAN_WGHT;
134 			break;
135 		case HAL_BT_COEX_STOMP_LOW:
136 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
137 			ahp->ah_btCoexWLANWeight = AR5416_STOMP_LOW_WLAN_WGHT;
138 			break;
139 		case HAL_BT_COEX_STOMP_ALL_FORCE:
140 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
141 			ahp->ah_btCoexWLANWeight =
142 			    AR5416_STOMP_ALL_FORCE_WLAN_WGHT;
143 			break;
144 		case HAL_BT_COEX_STOMP_LOW_FORCE:
145 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
146 			ahp->ah_btCoexWLANWeight =
147 			    AR5416_STOMP_LOW_FORCE_WLAN_WGHT;
148 			break;
149 		case HAL_BT_COEX_STOMP_NONE:
150 		case HAL_BT_COEX_NO_STOMP:
151 			ahp->ah_btCoexBTWeight = AR5416_BT_WGHT;
152 			ahp->ah_btCoexWLANWeight = AR5416_STOMP_NONE_WLAN_WGHT;
153 			break;
154 		default:
155 			/* There is a forceWeight from registry */
156 			ahp->ah_btCoexBTWeight = stompType & 0xffff;
157 			ahp->ah_btCoexWLANWeight = stompType >> 16;
158 			break;
159 		}
160 	}
161 }
162 
163 void
164 ar5416BTCoexSetupBmissThresh(struct ath_hal *ah, u_int32_t thresh)
165 {
166 	struct ath_hal_5416 *ahp = AH5416(ah);
167 
168 	ahp->ah_btCoexMode2 |= SM(thresh, AR_BT_BCN_MISS_THRESH);
169 }
170 
171 /*
172  * There is no antenna diversity for Owl, Kiwi, etc.
173  *
174  * Kite will override this particular method.
175  */
176 void
177 ar5416BTCoexAntennaDiversity(struct ath_hal *ah)
178 {
179 }
180 
181 void
182 ar5416BTCoexSetParameter(struct ath_hal *ah, u_int32_t type, u_int32_t value)
183 {
184 	struct ath_hal_5416 *ahp = AH5416(ah);
185 
186 	switch (type) {
187 	case HAL_BT_COEX_SET_ACK_PWR:
188 		if (value) {
189 			ahp->ah_btCoexFlag |= HAL_BT_COEX_FLAG_LOW_ACK_PWR;
190 			OS_REG_WRITE(ah, AR_TPC, HAL_BT_COEX_LOW_ACK_POWER);
191 		} else {
192 			ahp->ah_btCoexFlag &= ~HAL_BT_COEX_FLAG_LOW_ACK_PWR;
193 			OS_REG_WRITE(ah, AR_TPC, HAL_BT_COEX_HIGH_ACK_POWER);
194 		}
195 		break;
196 	case HAL_BT_COEX_ANTENNA_DIVERSITY:
197 		/* This is overridden for Kite */
198 		break;
199 #if 0
200         case HAL_BT_COEX_LOWER_TX_PWR:
201             if (value) {
202                 if ((ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_LOWER_TX_PWR) == 0) {
203                     ahp->ah_btCoexFlag |= HAL_BT_COEX_FLAG_LOWER_TX_PWR;
204 		    AH_PRIVATE(ah)->ah_config.ath_hal_desc_tpc = 1;
205                     ar5416SetTxPowerLimit(ah, AH_PRIVATE(ah)->ah_power_limit, AH_PRIVATE(ah)->ah_extra_txpow, 0);
206                 }
207             }
208             else {
209                 if (ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_LOWER_TX_PWR) {
210                     ahp->ah_btCoexFlag &= ~HAL_BT_COEX_FLAG_LOWER_TX_PWR;
211 		    AH_PRIVATE(ah)->ah_config.ath_hal_desc_tpc = 0;
212                     ar5416SetTxPowerLimit(ah, AH_PRIVATE(ah)->ah_power_limit, AH_PRIVATE(ah)->ah_extra_txpow, 0);
213                 }
214             }
215             break;
216 #endif
217 	default:
218 			break;
219 	}
220 }
221 
222 void
223 ar5416BTCoexDisable(struct ath_hal *ah)
224 {
225 	struct ath_hal_5416 *ahp = AH5416(ah);
226 
227 	/* Always drive rx_clear_external output as 0 */
228 	ar5416GpioSet(ah, ahp->ah_wlanActiveGpioSelect, 0);
229 	ar5416GpioCfgOutput(ah, ahp->ah_wlanActiveGpioSelect,
230 	    HAL_GPIO_OUTPUT_MUX_AS_OUTPUT);
231 
232 	if (AR_SREV_9271(ah)) {
233 		/*
234 		 * Set wlanActiveGpio to input when disabling BT-COEX to
235 		 * reduce power consumption
236 		 */
237 		ar5416GpioCfgInput(ah, ahp->ah_wlanActiveGpioSelect);
238 	}
239 
240 	if (ahp->ah_btCoexSingleAnt == AH_TRUE) {
241 		OS_REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE,
242 		    1);
243 		OS_REG_RMW_FIELD(ah, AR_MISC_MODE, AR_PCU_BT_ANT_PREVENT_RX,
244 		    0);
245 	}
246 
247 	OS_REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
248 	OS_REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
249 	if (AR_SREV_KIWI_10_OR_LATER(ah))
250 		OS_REG_WRITE(ah, AR_BT_COEX_WEIGHT2, 0);
251 	OS_REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
252 
253 	ahp->ah_btCoexEnabled = AH_FALSE;
254 }
255 
256 int
257 ar5416BTCoexEnable(struct ath_hal *ah)
258 {
259 	struct ath_hal_5416 *ahp = AH5416(ah);
260 
261 	/* Program coex mode and weight registers to actually enable coex */
262 	OS_REG_WRITE(ah, AR_BT_COEX_MODE, ahp->ah_btCoexMode);
263 	OS_REG_WRITE(ah, AR_BT_COEX_WEIGHT,
264 	    SM(ahp->ah_btCoexWLANWeight & 0xFFFF, AR_BT_WL_WGHT) |
265 	    SM(ahp->ah_btCoexBTWeight & 0xFFFF, AR_BT_BT_WGHT));
266 	if (AR_SREV_KIWI_10_OR_LATER(ah)) {
267 	OS_REG_WRITE(ah, AR_BT_COEX_WEIGHT2,
268 	    SM(ahp->ah_btCoexWLANWeight >> 16, AR_BT_WL_WGHT));
269 	}
270 	OS_REG_WRITE(ah, AR_BT_COEX_MODE2, ahp->ah_btCoexMode2);
271 
272 	/* Added Select GPIO5~8 instaed SPI */
273 	if (AR_SREV_9271(ah)) {
274 		uint32_t val;
275 
276 		val = OS_REG_READ(ah, AR9271_CLOCK_CONTROL);
277 		val &= 0xFFFFFEFF;
278 		OS_REG_WRITE(ah, AR9271_CLOCK_CONTROL, val);
279 	}
280 
281 	if (ahp->ah_btCoexFlag & HAL_BT_COEX_FLAG_LOW_ACK_PWR)
282 		OS_REG_WRITE(ah, AR_TPC, HAL_BT_COEX_LOW_ACK_POWER);
283 	else
284 		OS_REG_WRITE(ah, AR_TPC, HAL_BT_COEX_HIGH_ACK_POWER);
285 
286 	if (ahp->ah_btCoexSingleAnt == AH_TRUE) {
287 		OS_REG_RMW_FIELD(ah, AR_QUIET1,
288 		    AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
289 		/* XXX should update miscMode? */
290 		OS_REG_RMW_FIELD(ah, AR_MISC_MODE,
291 		    AR_PCU_BT_ANT_PREVENT_RX, 1);
292 	} else {
293 		OS_REG_RMW_FIELD(ah, AR_QUIET1,
294 		    AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
295 		/* XXX should update miscMode? */
296 		OS_REG_RMW_FIELD(ah, AR_MISC_MODE,
297 		    AR_PCU_BT_ANT_PREVENT_RX, 0);
298 	}
299 
300 	if (ahp->ah_btCoexConfigType == HAL_BT_COEX_CFG_3WIRE) {
301 		/* For 3-wire, configure the desired GPIO port for rx_clear */
302 		ar5416GpioCfgOutput(ah, ahp->ah_wlanActiveGpioSelect,
303 		    HAL_GPIO_OUTPUT_MUX_AS_WLAN_ACTIVE);
304 	} else {
305 		/*
306 		 * For 2-wire, configure the desired GPIO port
307 		 * for TX_FRAME output
308 		 */
309 		ar5416GpioCfgOutput(ah, ahp->ah_wlanActiveGpioSelect,
310 		    HAL_GPIO_OUTPUT_MUX_AS_TX_FRAME);
311 	}
312 
313 	/*
314 	 * Enable a weak pull down on BT_ACTIVE.
315 	 * When BT device is disabled, BT_ACTIVE might be floating.
316 	 */
317 	OS_REG_RMW(ah, AR_GPIO_PDPU,
318 	    (0x2 << (ahp->ah_btActiveGpioSelect * 2)),
319 	    (0x3 << (ahp->ah_btActiveGpioSelect * 2)));
320 
321 	ahp->ah_btCoexEnabled = AH_TRUE;
322 
323 	return (0);
324 }
325 
326 void
327 ar5416InitBTCoex(struct ath_hal *ah)
328 {
329 	struct ath_hal_5416 *ahp = AH5416(ah);
330 
331 	HALDEBUG(ah, HAL_DEBUG_BT_COEX,
332 	    "%s: called; configType=%d\n",
333 	    __func__,
334 	    ahp->ah_btCoexConfigType);
335 
336 	if (ahp->ah_btCoexConfigType == HAL_BT_COEX_CFG_3WIRE) {
337 		OS_REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
338 		    (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
339 		    AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
340 
341 		/*
342 		 * Set input mux for bt_prority_async and
343 		 * bt_active_async to GPIO pins
344 		 */
345 		OS_REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
346 		    AR_GPIO_INPUT_MUX1_BT_ACTIVE,
347 		    ahp->ah_btActiveGpioSelect);
348 		OS_REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
349 		    AR_GPIO_INPUT_MUX1_BT_PRIORITY,
350 		    ahp->ah_btPriorityGpioSelect);
351 
352 		/*
353 		 * Configure the desired GPIO ports for input
354 		 */
355 		ar5416GpioCfgInput(ah, ahp->ah_btActiveGpioSelect);
356 		ar5416GpioCfgInput(ah, ahp->ah_btPriorityGpioSelect);
357 
358 		/*
359 		 * Configure the antenna diversity setup.
360 		 * It's a no-op for AR9287; AR9285 overrides this
361 		 * as required.
362 		 */
363 		AH5416(ah)->ah_btCoexSetDiversity(ah);
364 
365 		if (ahp->ah_btCoexEnabled)
366 			ar5416BTCoexEnable(ah);
367 		else
368 			ar5416BTCoexDisable(ah);
369 	} else if (ahp->ah_btCoexConfigType != HAL_BT_COEX_CFG_NONE) {
370 		/* 2-wire */
371 		if (ahp->ah_btCoexEnabled) {
372 			/* Connect bt_active_async to baseband */
373 			OS_REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
374 			    (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
375 			     AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
376 			OS_REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
377 			    AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
378 
379 			/*
380 			 * Set input mux for bt_prority_async and
381 			 * bt_active_async to GPIO pins
382 			 */
383 			OS_REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
384 			    AR_GPIO_INPUT_MUX1_BT_ACTIVE,
385                             ahp->ah_btActiveGpioSelect);
386 
387 			/* Configure the desired GPIO ports for input */
388 			ar5416GpioCfgInput(ah, ahp->ah_btActiveGpioSelect);
389 
390 			/* Enable coexistence on initialization */
391 			ar5416BTCoexEnable(ah);
392 		}
393 	}
394 }
395