1 /*
2  * Copyright (c) 2008-2011 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 #include "hw-ops.h"
20 #include "ar9003_phy.h"
21 #include "ar9003_mci.h"
22 #include "ar9003_aic.h"
23 
ar9003_mci_reset_req_wakeup(struct ath_hw * ah)24 static void ar9003_mci_reset_req_wakeup(struct ath_hw *ah)
25 {
26 	REG_RMW_FIELD(ah, AR_MCI_COMMAND2,
27 		      AR_MCI_COMMAND2_RESET_REQ_WAKEUP, 1);
28 	udelay(1);
29 	REG_RMW_FIELD(ah, AR_MCI_COMMAND2,
30 		      AR_MCI_COMMAND2_RESET_REQ_WAKEUP, 0);
31 }
32 
ar9003_mci_wait_for_interrupt(struct ath_hw * ah,u32 address,u32 bit_position,int time_out)33 static int ar9003_mci_wait_for_interrupt(struct ath_hw *ah, u32 address,
34 					u32 bit_position, int time_out)
35 {
36 	struct ath_common *common = ath9k_hw_common(ah);
37 
38 	while (time_out) {
39 		if (!(REG_READ(ah, address) & bit_position)) {
40 			udelay(10);
41 			time_out -= 10;
42 
43 			if (time_out < 0)
44 				break;
45 			else
46 				continue;
47 		}
48 		REG_WRITE(ah, address, bit_position);
49 
50 		if (address != AR_MCI_INTERRUPT_RX_MSG_RAW)
51 			break;
52 
53 		if (bit_position & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE)
54 			ar9003_mci_reset_req_wakeup(ah);
55 
56 		if (bit_position & (AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING |
57 				    AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING))
58 			REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
59 				  AR_MCI_INTERRUPT_REMOTE_SLEEP_UPDATE);
60 
61 		REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, AR_MCI_INTERRUPT_RX_MSG);
62 		break;
63 	}
64 
65 	if (time_out <= 0) {
66 		ath_dbg(common, MCI,
67 			"MCI Wait for Reg 0x%08x = 0x%08x timeout\n",
68 			address, bit_position);
69 		ath_dbg(common, MCI,
70 			"MCI INT_RAW = 0x%08x, RX_MSG_RAW = 0x%08x\n",
71 			REG_READ(ah, AR_MCI_INTERRUPT_RAW),
72 			REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW));
73 		time_out = 0;
74 	}
75 
76 	return time_out;
77 }
78 
ar9003_mci_remote_reset(struct ath_hw * ah,bool wait_done)79 static void ar9003_mci_remote_reset(struct ath_hw *ah, bool wait_done)
80 {
81 	u32 payload[4] = { 0xffffffff, 0xffffffff, 0xffffffff, 0xffffff00};
82 
83 	ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0, payload, 16,
84 				wait_done, false);
85 	udelay(5);
86 }
87 
ar9003_mci_send_lna_transfer(struct ath_hw * ah,bool wait_done)88 static void ar9003_mci_send_lna_transfer(struct ath_hw *ah, bool wait_done)
89 {
90 	u32 payload = 0x00000000;
91 
92 	ar9003_mci_send_message(ah, MCI_LNA_TRANS, 0, &payload, 1,
93 				wait_done, false);
94 }
95 
ar9003_mci_send_req_wake(struct ath_hw * ah,bool wait_done)96 static void ar9003_mci_send_req_wake(struct ath_hw *ah, bool wait_done)
97 {
98 	ar9003_mci_send_message(ah, MCI_REQ_WAKE, MCI_FLAG_DISABLE_TIMESTAMP,
99 				NULL, 0, wait_done, false);
100 	udelay(5);
101 }
102 
ar9003_mci_send_sys_waking(struct ath_hw * ah,bool wait_done)103 static void ar9003_mci_send_sys_waking(struct ath_hw *ah, bool wait_done)
104 {
105 	ar9003_mci_send_message(ah, MCI_SYS_WAKING, MCI_FLAG_DISABLE_TIMESTAMP,
106 				NULL, 0, wait_done, false);
107 }
108 
ar9003_mci_send_lna_take(struct ath_hw * ah,bool wait_done)109 static void ar9003_mci_send_lna_take(struct ath_hw *ah, bool wait_done)
110 {
111 	u32 payload = 0x70000000;
112 
113 	ar9003_mci_send_message(ah, MCI_LNA_TAKE, 0, &payload, 1,
114 				wait_done, false);
115 }
116 
ar9003_mci_send_sys_sleeping(struct ath_hw * ah,bool wait_done)117 static void ar9003_mci_send_sys_sleeping(struct ath_hw *ah, bool wait_done)
118 {
119 	ar9003_mci_send_message(ah, MCI_SYS_SLEEPING,
120 				MCI_FLAG_DISABLE_TIMESTAMP,
121 				NULL, 0, wait_done, false);
122 }
123 
ar9003_mci_send_coex_version_query(struct ath_hw * ah,bool wait_done)124 static void ar9003_mci_send_coex_version_query(struct ath_hw *ah,
125 					       bool wait_done)
126 {
127 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
128 	u32 payload[4] = {0, 0, 0, 0};
129 
130 	if (mci->bt_version_known ||
131 	    (mci->bt_state == MCI_BT_SLEEP))
132 		return;
133 
134 	MCI_GPM_SET_TYPE_OPCODE(payload, MCI_GPM_COEX_AGENT,
135 				MCI_GPM_COEX_VERSION_QUERY);
136 	ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16, wait_done, true);
137 }
138 
ar9003_mci_send_coex_version_response(struct ath_hw * ah,bool wait_done)139 static void ar9003_mci_send_coex_version_response(struct ath_hw *ah,
140 						  bool wait_done)
141 {
142 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
143 	u32 payload[4] = {0, 0, 0, 0};
144 
145 	MCI_GPM_SET_TYPE_OPCODE(payload, MCI_GPM_COEX_AGENT,
146 				MCI_GPM_COEX_VERSION_RESPONSE);
147 	*(((u8 *)payload) + MCI_GPM_COEX_B_MAJOR_VERSION) =
148 		mci->wlan_ver_major;
149 	*(((u8 *)payload) + MCI_GPM_COEX_B_MINOR_VERSION) =
150 		mci->wlan_ver_minor;
151 	ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16, wait_done, true);
152 }
153 
ar9003_mci_send_coex_wlan_channels(struct ath_hw * ah,bool wait_done)154 static void ar9003_mci_send_coex_wlan_channels(struct ath_hw *ah,
155 					       bool wait_done)
156 {
157 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
158 	u32 *payload = &mci->wlan_channels[0];
159 
160 	if (!mci->wlan_channels_update ||
161 	    (mci->bt_state == MCI_BT_SLEEP))
162 		return;
163 
164 	MCI_GPM_SET_TYPE_OPCODE(payload, MCI_GPM_COEX_AGENT,
165 				MCI_GPM_COEX_WLAN_CHANNELS);
166 	ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16, wait_done, true);
167 	MCI_GPM_SET_TYPE_OPCODE(payload, 0xff, 0xff);
168 }
169 
ar9003_mci_send_coex_bt_status_query(struct ath_hw * ah,bool wait_done,u8 query_type)170 static void ar9003_mci_send_coex_bt_status_query(struct ath_hw *ah,
171 						bool wait_done, u8 query_type)
172 {
173 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
174 	u32 payload[4] = {0, 0, 0, 0};
175 	bool query_btinfo;
176 
177 	if (mci->bt_state == MCI_BT_SLEEP)
178 		return;
179 
180 	query_btinfo = !!(query_type & (MCI_GPM_COEX_QUERY_BT_ALL_INFO |
181 					MCI_GPM_COEX_QUERY_BT_TOPOLOGY));
182 	MCI_GPM_SET_TYPE_OPCODE(payload, MCI_GPM_COEX_AGENT,
183 				MCI_GPM_COEX_STATUS_QUERY);
184 
185 	*(((u8 *)payload) + MCI_GPM_COEX_B_BT_BITMAP) = query_type;
186 
187 	/*
188 	 * If bt_status_query message is  not sent successfully,
189 	 * then need_flush_btinfo should be set again.
190 	 */
191 	if (!ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
192 				wait_done, true)) {
193 		if (query_btinfo)
194 			mci->need_flush_btinfo = true;
195 	}
196 
197 	if (query_btinfo)
198 		mci->query_bt = false;
199 }
200 
ar9003_mci_send_coex_halt_bt_gpm(struct ath_hw * ah,bool halt,bool wait_done)201 static void ar9003_mci_send_coex_halt_bt_gpm(struct ath_hw *ah, bool halt,
202 					     bool wait_done)
203 {
204 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
205 	u32 payload[4] = {0, 0, 0, 0};
206 
207 	MCI_GPM_SET_TYPE_OPCODE(payload, MCI_GPM_COEX_AGENT,
208 				MCI_GPM_COEX_HALT_BT_GPM);
209 
210 	if (halt) {
211 		mci->query_bt = true;
212 		/* Send next unhalt no matter halt sent or not */
213 		mci->unhalt_bt_gpm = true;
214 		mci->need_flush_btinfo = true;
215 		*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) =
216 			MCI_GPM_COEX_BT_GPM_HALT;
217 	} else
218 		*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) =
219 			MCI_GPM_COEX_BT_GPM_UNHALT;
220 
221 	ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16, wait_done, true);
222 }
223 
ar9003_mci_prep_interface(struct ath_hw * ah)224 static void ar9003_mci_prep_interface(struct ath_hw *ah)
225 {
226 	struct ath_common *common = ath9k_hw_common(ah);
227 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
228 	u32 saved_mci_int_en;
229 	u32 mci_timeout = 150;
230 
231 	mci->bt_state = MCI_BT_SLEEP;
232 	saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN);
233 
234 	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
235 	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
236 		  REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW));
237 	REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
238 		  REG_READ(ah, AR_MCI_INTERRUPT_RAW));
239 
240 	ar9003_mci_remote_reset(ah, true);
241 	ar9003_mci_send_req_wake(ah, true);
242 
243 	if (!ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
244 				  AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING, 500))
245 		goto clear_redunt;
246 
247 	mci->bt_state = MCI_BT_AWAKE;
248 
249 	/*
250 	 * we don't need to send more remote_reset at this moment.
251 	 * If BT receive first remote_reset, then BT HW will
252 	 * be cleaned up and will be able to receive req_wake
253 	 * and BT HW will respond sys_waking.
254 	 * In this case, WLAN will receive BT's HW sys_waking.
255 	 * Otherwise, if BT SW missed initial remote_reset,
256 	 * that remote_reset will still clean up BT MCI RX,
257 	 * and the req_wake will wake BT up,
258 	 * and BT SW will respond this req_wake with a remote_reset and
259 	 * sys_waking. In this case, WLAN will receive BT's SW
260 	 * sys_waking. In either case, BT's RX is cleaned up. So we
261 	 * don't need to reply BT's remote_reset now, if any.
262 	 * Similarly, if in any case, WLAN can receive BT's sys_waking,
263 	 * that means WLAN's RX is also fine.
264 	 */
265 	ar9003_mci_send_sys_waking(ah, true);
266 	udelay(10);
267 
268 	/*
269 	 * Set BT priority interrupt value to be 0xff to
270 	 * avoid having too many BT PRIORITY interrupts.
271 	 */
272 	REG_WRITE(ah, AR_MCI_BT_PRI0, 0xFFFFFFFF);
273 	REG_WRITE(ah, AR_MCI_BT_PRI1, 0xFFFFFFFF);
274 	REG_WRITE(ah, AR_MCI_BT_PRI2, 0xFFFFFFFF);
275 	REG_WRITE(ah, AR_MCI_BT_PRI3, 0xFFFFFFFF);
276 	REG_WRITE(ah, AR_MCI_BT_PRI, 0X000000FF);
277 
278 	/*
279 	 * A contention reset will be received after send out
280 	 * sys_waking. Also BT priority interrupt bits will be set.
281 	 * Clear those bits before the next step.
282 	 */
283 
284 	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
285 		  AR_MCI_INTERRUPT_RX_MSG_CONT_RST);
286 	REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, AR_MCI_INTERRUPT_BT_PRI);
287 
288 	if (mci->is_2g && MCI_ANT_ARCH_PA_LNA_SHARED(mci)) {
289 		ar9003_mci_send_lna_transfer(ah, true);
290 		udelay(5);
291 	}
292 
293 	if (mci->is_2g && !mci->update_2g5g && MCI_ANT_ARCH_PA_LNA_SHARED(mci)) {
294 		if (ar9003_mci_wait_for_interrupt(ah,
295 					AR_MCI_INTERRUPT_RX_MSG_RAW,
296 					AR_MCI_INTERRUPT_RX_MSG_LNA_INFO,
297 					mci_timeout))
298 			ath_dbg(common, MCI,
299 				"MCI WLAN has control over the LNA & BT obeys it\n");
300 		else
301 			ath_dbg(common, MCI,
302 				"MCI BT didn't respond to LNA_TRANS\n");
303 	}
304 
305 clear_redunt:
306 	/* Clear the extra redundant SYS_WAKING from BT */
307 	if ((mci->bt_state == MCI_BT_AWAKE) &&
308 	    (REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
309 			    AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING)) &&
310 	    (REG_READ_FIELD(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
311 			    AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) == 0)) {
312 		REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
313 			  AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING);
314 		REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
315 			  AR_MCI_INTERRUPT_REMOTE_SLEEP_UPDATE);
316 	}
317 
318 	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en);
319 }
320 
ar9003_mci_set_full_sleep(struct ath_hw * ah)321 void ar9003_mci_set_full_sleep(struct ath_hw *ah)
322 {
323 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
324 
325 	if (ar9003_mci_state(ah, MCI_STATE_ENABLE) &&
326 	    (mci->bt_state != MCI_BT_SLEEP) &&
327 	    !mci->halted_bt_gpm) {
328 		ar9003_mci_send_coex_halt_bt_gpm(ah, true, true);
329 	}
330 
331 	mci->ready = false;
332 }
333 
ar9003_mci_disable_interrupt(struct ath_hw * ah)334 static void ar9003_mci_disable_interrupt(struct ath_hw *ah)
335 {
336 	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
337 	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_EN, 0);
338 }
339 
ar9003_mci_enable_interrupt(struct ath_hw * ah)340 static void ar9003_mci_enable_interrupt(struct ath_hw *ah)
341 {
342 	REG_WRITE(ah, AR_MCI_INTERRUPT_EN, AR_MCI_INTERRUPT_DEFAULT);
343 	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_EN,
344 		  AR_MCI_INTERRUPT_RX_MSG_DEFAULT);
345 }
346 
ar9003_mci_check_int(struct ath_hw * ah,u32 ints)347 static bool ar9003_mci_check_int(struct ath_hw *ah, u32 ints)
348 {
349 	u32 intr;
350 
351 	intr = REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW);
352 	return ((intr & ints) == ints);
353 }
354 
ar9003_mci_get_interrupt(struct ath_hw * ah,u32 * raw_intr,u32 * rx_msg_intr)355 void ar9003_mci_get_interrupt(struct ath_hw *ah, u32 *raw_intr,
356 			      u32 *rx_msg_intr)
357 {
358 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
359 
360 	*raw_intr = mci->raw_intr;
361 	*rx_msg_intr = mci->rx_msg_intr;
362 
363 	/* Clean int bits after the values are read. */
364 	mci->raw_intr = 0;
365 	mci->rx_msg_intr = 0;
366 }
367 EXPORT_SYMBOL(ar9003_mci_get_interrupt);
368 
ar9003_mci_get_isr(struct ath_hw * ah,enum ath9k_int * masked)369 void ar9003_mci_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
370 {
371 	struct ath_common *common = ath9k_hw_common(ah);
372 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
373 	u32 raw_intr, rx_msg_intr;
374 
375 	rx_msg_intr = REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW);
376 	raw_intr = REG_READ(ah, AR_MCI_INTERRUPT_RAW);
377 
378 	if ((raw_intr == 0xdeadbeef) || (rx_msg_intr == 0xdeadbeef)) {
379 		ath_dbg(common, MCI,
380 			"MCI gets 0xdeadbeef during int processing\n");
381 	} else {
382 		mci->rx_msg_intr |= rx_msg_intr;
383 		mci->raw_intr |= raw_intr;
384 		*masked |= ATH9K_INT_MCI;
385 
386 		if (rx_msg_intr & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO)
387 			mci->cont_status = REG_READ(ah, AR_MCI_CONT_STATUS);
388 
389 		REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, rx_msg_intr);
390 		REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, raw_intr);
391 	}
392 }
393 
ar9003_mci_2g5g_changed(struct ath_hw * ah,bool is_2g)394 static void ar9003_mci_2g5g_changed(struct ath_hw *ah, bool is_2g)
395 {
396 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
397 
398 	if (!mci->update_2g5g &&
399 	    (mci->is_2g != is_2g))
400 		mci->update_2g5g = true;
401 
402 	mci->is_2g = is_2g;
403 }
404 
ar9003_mci_is_gpm_valid(struct ath_hw * ah,u32 msg_index)405 static bool ar9003_mci_is_gpm_valid(struct ath_hw *ah, u32 msg_index)
406 {
407 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
408 	u32 *payload;
409 	u32 recv_type, offset;
410 
411 	if (msg_index == MCI_GPM_INVALID)
412 		return false;
413 
414 	offset = msg_index << 4;
415 
416 	payload = (u32 *)(mci->gpm_buf + offset);
417 	recv_type = MCI_GPM_TYPE(payload);
418 
419 	if (recv_type == MCI_GPM_RSVD_PATTERN)
420 		return false;
421 
422 	return true;
423 }
424 
ar9003_mci_observation_set_up(struct ath_hw * ah)425 static void ar9003_mci_observation_set_up(struct ath_hw *ah)
426 {
427 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
428 
429 	if (mci->config & ATH_MCI_CONFIG_MCI_OBS_MCI) {
430 		ath9k_hw_gpio_request_out(ah, 3, NULL,
431 					  AR_GPIO_OUTPUT_MUX_AS_MCI_WLAN_DATA);
432 		ath9k_hw_gpio_request_out(ah, 2, NULL,
433 					  AR_GPIO_OUTPUT_MUX_AS_MCI_WLAN_CLK);
434 		ath9k_hw_gpio_request_out(ah, 1, NULL,
435 					  AR_GPIO_OUTPUT_MUX_AS_MCI_BT_DATA);
436 		ath9k_hw_gpio_request_out(ah, 0, NULL,
437 					  AR_GPIO_OUTPUT_MUX_AS_MCI_BT_CLK);
438 	} else if (mci->config & ATH_MCI_CONFIG_MCI_OBS_TXRX) {
439 		ath9k_hw_gpio_request_out(ah, 3, NULL,
440 					  AR_GPIO_OUTPUT_MUX_AS_WL_IN_TX);
441 		ath9k_hw_gpio_request_out(ah, 2, NULL,
442 					  AR_GPIO_OUTPUT_MUX_AS_WL_IN_RX);
443 		ath9k_hw_gpio_request_out(ah, 1, NULL,
444 					  AR_GPIO_OUTPUT_MUX_AS_BT_IN_TX);
445 		ath9k_hw_gpio_request_out(ah, 0, NULL,
446 					  AR_GPIO_OUTPUT_MUX_AS_BT_IN_RX);
447 		ath9k_hw_gpio_request_out(ah, 5, NULL,
448 					  AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
449 	} else if (mci->config & ATH_MCI_CONFIG_MCI_OBS_BT) {
450 		ath9k_hw_gpio_request_out(ah, 3, NULL,
451 					  AR_GPIO_OUTPUT_MUX_AS_BT_IN_TX);
452 		ath9k_hw_gpio_request_out(ah, 2, NULL,
453 					  AR_GPIO_OUTPUT_MUX_AS_BT_IN_RX);
454 		ath9k_hw_gpio_request_out(ah, 1, NULL,
455 					  AR_GPIO_OUTPUT_MUX_AS_MCI_BT_DATA);
456 		ath9k_hw_gpio_request_out(ah, 0, NULL,
457 					  AR_GPIO_OUTPUT_MUX_AS_MCI_BT_CLK);
458 	} else
459 		return;
460 
461 	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL(ah), AR_GPIO_JTAG_DISABLE);
462 
463 	REG_RMW_FIELD(ah, AR_PHY_GLB_CONTROL, AR_GLB_DS_JTAG_DISABLE, 1);
464 	REG_RMW_FIELD(ah, AR_PHY_GLB_CONTROL, AR_GLB_WLAN_UART_INTF_EN, 0);
465 	REG_SET_BIT(ah, AR_GLB_GPIO_CONTROL, ATH_MCI_CONFIG_MCI_OBS_GPIO);
466 
467 	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_GPIO_OBS_SEL, 0);
468 	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_MAC_BB_OBS_SEL, 1);
469 	REG_WRITE(ah, AR_OBS(ah), 0x4b);
470 	REG_RMW_FIELD(ah, AR_DIAG_SW, AR_DIAG_OBS_PT_SEL1, 0x03);
471 	REG_RMW_FIELD(ah, AR_DIAG_SW, AR_DIAG_OBS_PT_SEL2, 0x01);
472 	REG_RMW_FIELD(ah, AR_MACMISC, AR_MACMISC_MISC_OBS_BUS_LSB, 0x02);
473 	REG_RMW_FIELD(ah, AR_MACMISC, AR_MACMISC_MISC_OBS_BUS_MSB, 0x03);
474 	REG_RMW_FIELD(ah, AR_PHY_TEST_CTL_STATUS(ah),
475 		      AR_PHY_TEST_CTL_DEBUGPORT_SEL, 0x07);
476 }
477 
ar9003_mci_send_coex_bt_flags(struct ath_hw * ah,bool wait_done,u8 opcode,u32 bt_flags)478 static bool ar9003_mci_send_coex_bt_flags(struct ath_hw *ah, bool wait_done,
479 					  u8 opcode, u32 bt_flags)
480 {
481 	u32 pld[4] = {0, 0, 0, 0};
482 
483 	MCI_GPM_SET_TYPE_OPCODE(pld, MCI_GPM_COEX_AGENT,
484 				MCI_GPM_COEX_BT_UPDATE_FLAGS);
485 
486 	*(((u8 *)pld) + MCI_GPM_COEX_B_BT_FLAGS_OP)  = opcode;
487 	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 0) = bt_flags & 0xFF;
488 	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 1) = (bt_flags >> 8) & 0xFF;
489 	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 2) = (bt_flags >> 16) & 0xFF;
490 	*(((u8 *)pld) + MCI_GPM_COEX_W_BT_FLAGS + 3) = (bt_flags >> 24) & 0xFF;
491 
492 	return ar9003_mci_send_message(ah, MCI_GPM, 0, pld, 16,
493 				       wait_done, true);
494 }
495 
ar9003_mci_sync_bt_state(struct ath_hw * ah)496 static void ar9003_mci_sync_bt_state(struct ath_hw *ah)
497 {
498 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
499 	u32 cur_bt_state;
500 
501 	cur_bt_state = ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP);
502 
503 	if (mci->bt_state != cur_bt_state)
504 		mci->bt_state = cur_bt_state;
505 
506 	if (mci->bt_state != MCI_BT_SLEEP) {
507 
508 		ar9003_mci_send_coex_version_query(ah, true);
509 		ar9003_mci_send_coex_wlan_channels(ah, true);
510 
511 		if (mci->unhalt_bt_gpm == true)
512 			ar9003_mci_send_coex_halt_bt_gpm(ah, false, true);
513 	}
514 }
515 
ar9003_mci_check_bt(struct ath_hw * ah)516 void ar9003_mci_check_bt(struct ath_hw *ah)
517 {
518 	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
519 
520 	if (!mci_hw->ready)
521 		return;
522 
523 	/*
524 	 * check BT state again to make
525 	 * sure it's not changed.
526 	 */
527 	ar9003_mci_sync_bt_state(ah);
528 	ar9003_mci_2g5g_switch(ah, true);
529 
530 	if ((mci_hw->bt_state == MCI_BT_AWAKE) &&
531 	    (mci_hw->query_bt == true)) {
532 		mci_hw->need_flush_btinfo = true;
533 	}
534 }
535 
ar9003_mci_process_gpm_extra(struct ath_hw * ah,u8 gpm_type,u8 gpm_opcode,u32 * p_gpm)536 static void ar9003_mci_process_gpm_extra(struct ath_hw *ah, u8 gpm_type,
537 					 u8 gpm_opcode, u32 *p_gpm)
538 {
539 	struct ath_common *common = ath9k_hw_common(ah);
540 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
541 	u8 *p_data = (u8 *) p_gpm;
542 
543 	if (gpm_type != MCI_GPM_COEX_AGENT)
544 		return;
545 
546 	switch (gpm_opcode) {
547 	case MCI_GPM_COEX_VERSION_QUERY:
548 		ath_dbg(common, MCI, "MCI Recv GPM COEX Version Query\n");
549 		ar9003_mci_send_coex_version_response(ah, true);
550 		break;
551 	case MCI_GPM_COEX_VERSION_RESPONSE:
552 		ath_dbg(common, MCI, "MCI Recv GPM COEX Version Response\n");
553 		mci->bt_ver_major =
554 			*(p_data + MCI_GPM_COEX_B_MAJOR_VERSION);
555 		mci->bt_ver_minor =
556 			*(p_data + MCI_GPM_COEX_B_MINOR_VERSION);
557 		mci->bt_version_known = true;
558 		ath_dbg(common, MCI, "MCI BT Coex version: %d.%d\n",
559 			mci->bt_ver_major, mci->bt_ver_minor);
560 		break;
561 	case MCI_GPM_COEX_STATUS_QUERY:
562 		ath_dbg(common, MCI,
563 			"MCI Recv GPM COEX Status Query = 0x%02X\n",
564 			*(p_data + MCI_GPM_COEX_B_WLAN_BITMAP));
565 		mci->wlan_channels_update = true;
566 		ar9003_mci_send_coex_wlan_channels(ah, true);
567 		break;
568 	case MCI_GPM_COEX_BT_PROFILE_INFO:
569 		mci->query_bt = true;
570 		ath_dbg(common, MCI, "MCI Recv GPM COEX BT_Profile_Info\n");
571 		break;
572 	case MCI_GPM_COEX_BT_STATUS_UPDATE:
573 		mci->query_bt = true;
574 		ath_dbg(common, MCI,
575 			"MCI Recv GPM COEX BT_Status_Update SEQ=%d (drop&query)\n",
576 			*(p_gpm + 3));
577 		break;
578 	default:
579 		break;
580 	}
581 }
582 
ar9003_mci_wait_for_gpm(struct ath_hw * ah,u8 gpm_type,u8 gpm_opcode,int time_out)583 static u32 ar9003_mci_wait_for_gpm(struct ath_hw *ah, u8 gpm_type,
584 				   u8 gpm_opcode, int time_out)
585 {
586 	struct ath_common *common = ath9k_hw_common(ah);
587 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
588 	u32 *p_gpm = NULL, more_data;
589 	u32 offset;
590 	u8 recv_type = 0, recv_opcode = 0;
591 	bool b_is_bt_cal_done = (gpm_type == MCI_GPM_BT_CAL_DONE);
592 
593 	more_data = time_out ? MCI_GPM_NOMORE : MCI_GPM_MORE;
594 
595 	while (time_out > 0) {
596 		if (p_gpm) {
597 			MCI_GPM_RECYCLE(p_gpm);
598 			p_gpm = NULL;
599 		}
600 
601 		if (more_data != MCI_GPM_MORE)
602 			time_out = ar9003_mci_wait_for_interrupt(ah,
603 					AR_MCI_INTERRUPT_RX_MSG_RAW,
604 					AR_MCI_INTERRUPT_RX_MSG_GPM,
605 					time_out);
606 
607 		if (!time_out)
608 			break;
609 
610 		offset = ar9003_mci_get_next_gpm_offset(ah, &more_data);
611 
612 		if (offset == MCI_GPM_INVALID)
613 			continue;
614 
615 		p_gpm = (u32 *) (mci->gpm_buf + offset);
616 		recv_type = MCI_GPM_TYPE(p_gpm);
617 		recv_opcode = MCI_GPM_OPCODE(p_gpm);
618 
619 		if (MCI_GPM_IS_CAL_TYPE(recv_type)) {
620 			if (recv_type == gpm_type) {
621 				if ((gpm_type == MCI_GPM_BT_CAL_DONE) &&
622 				    !b_is_bt_cal_done) {
623 					gpm_type = MCI_GPM_BT_CAL_GRANT;
624 					continue;
625 				}
626 				break;
627 			}
628 		} else if ((recv_type == gpm_type) &&
629 			   (recv_opcode == gpm_opcode))
630 			break;
631 
632 		/*
633 		 * check if it's cal_grant
634 		 *
635 		 * When we're waiting for cal_grant in reset routine,
636 		 * it's possible that BT sends out cal_request at the
637 		 * same time. Since BT's calibration doesn't happen
638 		 * that often, we'll let BT completes calibration then
639 		 * we continue to wait for cal_grant from BT.
640 		 * Orginal: Wait BT_CAL_GRANT.
641 		 * New: Receive BT_CAL_REQ -> send WLAN_CAL_GRANT->wait
642 		 * BT_CAL_DONE -> Wait BT_CAL_GRANT.
643 		 */
644 
645 		if ((gpm_type == MCI_GPM_BT_CAL_GRANT) &&
646 		    (recv_type == MCI_GPM_BT_CAL_REQ)) {
647 
648 			u32 payload[4] = {0, 0, 0, 0};
649 
650 			gpm_type = MCI_GPM_BT_CAL_DONE;
651 			MCI_GPM_SET_CAL_TYPE(payload,
652 					     MCI_GPM_WLAN_CAL_GRANT);
653 			ar9003_mci_send_message(ah, MCI_GPM, 0, payload, 16,
654 						false, false);
655 			continue;
656 		} else {
657 			ath_dbg(common, MCI, "MCI GPM subtype not match 0x%x\n",
658 				*(p_gpm + 1));
659 			ar9003_mci_process_gpm_extra(ah, recv_type,
660 						     recv_opcode, p_gpm);
661 		}
662 	}
663 
664 	if (p_gpm) {
665 		MCI_GPM_RECYCLE(p_gpm);
666 		p_gpm = NULL;
667 	}
668 
669 	if (time_out <= 0)
670 		time_out = 0;
671 
672 	while (more_data == MCI_GPM_MORE) {
673 		offset = ar9003_mci_get_next_gpm_offset(ah, &more_data);
674 		if (offset == MCI_GPM_INVALID)
675 			break;
676 
677 		p_gpm = (u32 *) (mci->gpm_buf + offset);
678 		recv_type = MCI_GPM_TYPE(p_gpm);
679 		recv_opcode = MCI_GPM_OPCODE(p_gpm);
680 
681 		if (!MCI_GPM_IS_CAL_TYPE(recv_type))
682 			ar9003_mci_process_gpm_extra(ah, recv_type,
683 						     recv_opcode, p_gpm);
684 
685 		MCI_GPM_RECYCLE(p_gpm);
686 	}
687 
688 	return time_out;
689 }
690 
ar9003_mci_start_reset(struct ath_hw * ah,struct ath9k_channel * chan)691 bool ar9003_mci_start_reset(struct ath_hw *ah, struct ath9k_channel *chan)
692 {
693 	struct ath_common *common = ath9k_hw_common(ah);
694 	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
695 	u32 payload[4] = {0, 0, 0, 0};
696 
697 	ar9003_mci_2g5g_changed(ah, IS_CHAN_2GHZ(chan));
698 
699 	if (mci_hw->bt_state != MCI_BT_CAL_START)
700 		return false;
701 
702 	mci_hw->bt_state = MCI_BT_CAL;
703 
704 	/*
705 	 * MCI FIX: disable mci interrupt here. This is to avoid
706 	 * SW_MSG_DONE or RX_MSG bits to trigger MCI_INT and
707 	 * lead to mci_intr reentry.
708 	 */
709 	ar9003_mci_disable_interrupt(ah);
710 
711 	MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_GRANT);
712 	ar9003_mci_send_message(ah, MCI_GPM, 0, payload,
713 				16, true, false);
714 
715 	/* Wait BT calibration to be completed for 25ms */
716 
717 	if (ar9003_mci_wait_for_gpm(ah, MCI_GPM_BT_CAL_DONE,
718 				    0, 25000))
719 		ath_dbg(common, MCI, "MCI BT_CAL_DONE received\n");
720 	else
721 		ath_dbg(common, MCI,
722 			"MCI BT_CAL_DONE not received\n");
723 
724 	mci_hw->bt_state = MCI_BT_AWAKE;
725 	/* MCI FIX: enable mci interrupt here */
726 	ar9003_mci_enable_interrupt(ah);
727 
728 	return true;
729 }
730 
ar9003_mci_end_reset(struct ath_hw * ah,struct ath9k_channel * chan,struct ath9k_hw_cal_data * caldata)731 int ar9003_mci_end_reset(struct ath_hw *ah, struct ath9k_channel *chan,
732 			 struct ath9k_hw_cal_data *caldata)
733 {
734 	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
735 
736 	if (!mci_hw->ready)
737 		return 0;
738 
739 	if (!IS_CHAN_2GHZ(chan) || (mci_hw->bt_state != MCI_BT_SLEEP))
740 		goto exit;
741 
742 	if (!ar9003_mci_check_int(ah, AR_MCI_INTERRUPT_RX_MSG_REMOTE_RESET) &&
743 	    !ar9003_mci_check_int(ah, AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE))
744 		goto exit;
745 
746 	/*
747 	 * BT is sleeping. Check if BT wakes up during
748 	 * WLAN calibration. If BT wakes up during
749 	 * WLAN calibration, need to go through all
750 	 * message exchanges again and recal.
751 	 */
752 	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
753 		  (AR_MCI_INTERRUPT_RX_MSG_REMOTE_RESET |
754 		   AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE));
755 
756 	ar9003_mci_remote_reset(ah, true);
757 	ar9003_mci_send_sys_waking(ah, true);
758 	udelay(1);
759 
760 	if (IS_CHAN_2GHZ(chan))
761 		ar9003_mci_send_lna_transfer(ah, true);
762 
763 	mci_hw->bt_state = MCI_BT_AWAKE;
764 
765 	REG_CLR_BIT(ah, AR_PHY_TIMING4,
766 		    1 << AR_PHY_TIMING_CONTROL4_DO_GAIN_DC_IQ_CAL_SHIFT);
767 
768 	if (caldata) {
769 		clear_bit(TXIQCAL_DONE, &caldata->cal_flags);
770 		clear_bit(TXCLCAL_DONE, &caldata->cal_flags);
771 		clear_bit(RTT_DONE, &caldata->cal_flags);
772 	}
773 
774 	if (!ath9k_hw_init_cal(ah, chan))
775 		return -EIO;
776 
777 	REG_SET_BIT(ah, AR_PHY_TIMING4,
778 		    1 << AR_PHY_TIMING_CONTROL4_DO_GAIN_DC_IQ_CAL_SHIFT);
779 
780 exit:
781 	ar9003_mci_enable_interrupt(ah);
782 	return 0;
783 }
784 
ar9003_mci_mute_bt(struct ath_hw * ah)785 static void ar9003_mci_mute_bt(struct ath_hw *ah)
786 {
787 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
788 
789 	/* disable all MCI messages */
790 	REG_WRITE(ah, AR_MCI_MSG_ATTRIBUTES_TABLE, 0xffff0000);
791 	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS0, 0xffffffff);
792 	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS1, 0xffffffff);
793 	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS2, 0xffffffff);
794 	REG_WRITE(ah, AR_BTCOEX_WL_WEIGHTS3, 0xffffffff);
795 	REG_SET_BIT(ah, AR_MCI_TX_CTRL, AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
796 
797 	/* wait pending HW messages to flush out */
798 	udelay(10);
799 
800 	/*
801 	 * Send LNA_TAKE and SYS_SLEEPING when
802 	 * 1. reset not after resuming from full sleep
803 	 * 2. before reset MCI RX, to quiet BT and avoid MCI RX misalignment
804 	 */
805 	if (MCI_ANT_ARCH_PA_LNA_SHARED(mci)) {
806 		ar9003_mci_send_lna_take(ah, true);
807 		udelay(5);
808 	}
809 
810 	ar9003_mci_send_sys_sleeping(ah, true);
811 }
812 
ar9003_mci_osla_setup(struct ath_hw * ah,bool enable)813 static void ar9003_mci_osla_setup(struct ath_hw *ah, bool enable)
814 {
815 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
816 	u32 thresh;
817 
818 	if (!enable) {
819 		REG_CLR_BIT(ah, AR_BTCOEX_CTRL,
820 			    AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
821 		return;
822 	}
823 	REG_RMW_FIELD(ah, AR_MCI_SCHD_TABLE_2, AR_MCI_SCHD_TABLE_2_HW_BASED, 1);
824 	REG_RMW_FIELD(ah, AR_MCI_SCHD_TABLE_2,
825 		      AR_MCI_SCHD_TABLE_2_MEM_BASED, 1);
826 
827 	if (AR_SREV_9565(ah))
828 		REG_RMW_FIELD(ah, AR_MCI_MISC, AR_MCI_MISC_HW_FIX_EN, 1);
829 
830 	if (!(mci->config & ATH_MCI_CONFIG_DISABLE_AGGR_THRESH)) {
831 		thresh = MS(mci->config, ATH_MCI_CONFIG_AGGR_THRESH);
832 		REG_RMW_FIELD(ah, AR_BTCOEX_CTRL,
833 			      AR_BTCOEX_CTRL_AGGR_THRESH, thresh);
834 		REG_RMW_FIELD(ah, AR_BTCOEX_CTRL,
835 			      AR_BTCOEX_CTRL_TIME_TO_NEXT_BT_THRESH_EN, 1);
836 	} else
837 		REG_RMW_FIELD(ah, AR_BTCOEX_CTRL,
838 			      AR_BTCOEX_CTRL_TIME_TO_NEXT_BT_THRESH_EN, 0);
839 
840 	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL,
841 		      AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN, 1);
842 }
843 
ar9003_mci_stat_setup(struct ath_hw * ah)844 static void ar9003_mci_stat_setup(struct ath_hw *ah)
845 {
846 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
847 
848 	if (!AR_SREV_9565(ah))
849 		return;
850 
851 	if (mci->config & ATH_MCI_CONFIG_MCI_STAT_DBG) {
852 		REG_RMW_FIELD(ah, AR_MCI_DBG_CNT_CTRL,
853 			      AR_MCI_DBG_CNT_CTRL_ENABLE, 1);
854 		REG_RMW_FIELD(ah, AR_MCI_DBG_CNT_CTRL,
855 			      AR_MCI_DBG_CNT_CTRL_BT_LINKID,
856 			      MCI_STAT_ALL_BT_LINKID);
857 	} else {
858 		REG_RMW_FIELD(ah, AR_MCI_DBG_CNT_CTRL,
859 			      AR_MCI_DBG_CNT_CTRL_ENABLE, 0);
860 	}
861 }
862 
ar9003_mci_set_btcoex_ctrl_9565_1ANT(struct ath_hw * ah)863 static void ar9003_mci_set_btcoex_ctrl_9565_1ANT(struct ath_hw *ah)
864 {
865 	u32 regval;
866 
867 	regval = SM(1, AR_BTCOEX_CTRL_AR9462_MODE) |
868 		 SM(1, AR_BTCOEX_CTRL_WBTIMER_EN) |
869 		 SM(1, AR_BTCOEX_CTRL_PA_SHARED) |
870 		 SM(1, AR_BTCOEX_CTRL_LNA_SHARED) |
871 		 SM(1, AR_BTCOEX_CTRL_NUM_ANTENNAS) |
872 		 SM(1, AR_BTCOEX_CTRL_RX_CHAIN_MASK) |
873 		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_ACK) |
874 		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_BCN) |
875 		 SM(0, AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
876 
877 	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2,
878 		      AR_BTCOEX_CTRL2_TX_CHAIN_MASK, 0x1);
879 	REG_WRITE(ah, AR_BTCOEX_CTRL, regval);
880 }
881 
ar9003_mci_set_btcoex_ctrl_9565_2ANT(struct ath_hw * ah)882 static void ar9003_mci_set_btcoex_ctrl_9565_2ANT(struct ath_hw *ah)
883 {
884 	u32 regval;
885 
886 	regval = SM(1, AR_BTCOEX_CTRL_AR9462_MODE) |
887 		 SM(1, AR_BTCOEX_CTRL_WBTIMER_EN) |
888 		 SM(0, AR_BTCOEX_CTRL_PA_SHARED) |
889 		 SM(0, AR_BTCOEX_CTRL_LNA_SHARED) |
890 		 SM(2, AR_BTCOEX_CTRL_NUM_ANTENNAS) |
891 		 SM(1, AR_BTCOEX_CTRL_RX_CHAIN_MASK) |
892 		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_ACK) |
893 		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_BCN) |
894 		 SM(0, AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
895 
896 	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2,
897 		      AR_BTCOEX_CTRL2_TX_CHAIN_MASK, 0x0);
898 	REG_WRITE(ah, AR_BTCOEX_CTRL, regval);
899 }
900 
ar9003_mci_set_btcoex_ctrl_9462(struct ath_hw * ah)901 static void ar9003_mci_set_btcoex_ctrl_9462(struct ath_hw *ah)
902 {
903 	u32 regval;
904 
905         regval = SM(1, AR_BTCOEX_CTRL_AR9462_MODE) |
906 		 SM(1, AR_BTCOEX_CTRL_WBTIMER_EN) |
907 		 SM(1, AR_BTCOEX_CTRL_PA_SHARED) |
908 		 SM(1, AR_BTCOEX_CTRL_LNA_SHARED) |
909 		 SM(2, AR_BTCOEX_CTRL_NUM_ANTENNAS) |
910 		 SM(3, AR_BTCOEX_CTRL_RX_CHAIN_MASK) |
911 		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_ACK) |
912 		 SM(0, AR_BTCOEX_CTRL_1_CHAIN_BCN) |
913 		 SM(0, AR_BTCOEX_CTRL_ONE_STEP_LOOK_AHEAD_EN);
914 
915 	REG_WRITE(ah, AR_BTCOEX_CTRL, regval);
916 }
917 
ar9003_mci_reset(struct ath_hw * ah,bool en_int,bool is_2g,bool is_full_sleep)918 int ar9003_mci_reset(struct ath_hw *ah, bool en_int, bool is_2g,
919 		     bool is_full_sleep)
920 {
921 	struct ath_common *common = ath9k_hw_common(ah);
922 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
923 	u32 regval, i;
924 
925 	ath_dbg(common, MCI, "MCI Reset (full_sleep = %d, is_2g = %d)\n",
926 		is_full_sleep, is_2g);
927 
928 	if (REG_READ(ah, AR_BTCOEX_CTRL) == 0xdeadbeef) {
929 		ath_err(common, "BTCOEX control register is dead\n");
930 		return -EINVAL;
931 	}
932 
933 	/* Program MCI DMA related registers */
934 	REG_WRITE(ah, AR_MCI_GPM_0, mci->gpm_addr);
935 	REG_WRITE(ah, AR_MCI_GPM_1, mci->gpm_len);
936 	REG_WRITE(ah, AR_MCI_SCHD_TABLE_0, mci->sched_addr);
937 
938 	/*
939 	* To avoid MCI state machine be affected by incoming remote MCI msgs,
940 	* MCI mode will be enabled later, right before reset the MCI TX and RX.
941 	*/
942 	if (AR_SREV_9565(ah)) {
943 		u8 ant = MS(mci->config, ATH_MCI_CONFIG_ANT_ARCH);
944 
945 		if (ant == ATH_MCI_ANT_ARCH_1_ANT_PA_LNA_SHARED)
946 			ar9003_mci_set_btcoex_ctrl_9565_1ANT(ah);
947 		else
948 			ar9003_mci_set_btcoex_ctrl_9565_2ANT(ah);
949 	} else {
950 		ar9003_mci_set_btcoex_ctrl_9462(ah);
951 	}
952 
953 	if (is_2g && !(mci->config & ATH_MCI_CONFIG_DISABLE_OSLA))
954 		ar9003_mci_osla_setup(ah, true);
955 	else
956 		ar9003_mci_osla_setup(ah, false);
957 
958 	REG_SET_BIT(ah, AR_PHY_GLB_CONTROL,
959 		    AR_BTCOEX_CTRL_SPDT_ENABLE);
960 	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL3,
961 		      AR_BTCOEX_CTRL3_CONT_INFO_TIMEOUT, 20);
962 
963 	REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2, AR_BTCOEX_CTRL2_RX_DEWEIGHT, 0);
964 	REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
965 
966 	/* Set the time out to 3.125ms (5 BT slots) */
967 	REG_RMW_FIELD(ah, AR_BTCOEX_WL_LNA, AR_BTCOEX_WL_LNA_TIMEOUT, 0x3D090);
968 
969 	/* concurrent tx priority */
970 	if (mci->config & ATH_MCI_CONFIG_CONCUR_TX) {
971 		REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2,
972 			      AR_BTCOEX_CTRL2_DESC_BASED_TXPWR_ENABLE, 0);
973 		REG_RMW_FIELD(ah, AR_BTCOEX_CTRL2,
974 			      AR_BTCOEX_CTRL2_TXPWR_THRESH, 0x7f);
975 		REG_RMW_FIELD(ah, AR_BTCOEX_CTRL,
976 			      AR_BTCOEX_CTRL_REDUCE_TXPWR, 0);
977 		for (i = 0; i < 8; i++)
978 			REG_WRITE(ah, AR_BTCOEX_MAX_TXPWR(i), 0x7f7f7f7f);
979 	}
980 
981 	regval = MS(mci->config, ATH_MCI_CONFIG_CLK_DIV);
982 	REG_RMW_FIELD(ah, AR_MCI_TX_CTRL, AR_MCI_TX_CTRL_CLK_DIV, regval);
983 	REG_SET_BIT(ah, AR_BTCOEX_CTRL, AR_BTCOEX_CTRL_MCI_MODE_EN);
984 
985 	/* Resetting the Rx and Tx paths of MCI */
986 	regval = REG_READ(ah, AR_MCI_COMMAND2);
987 	regval |= SM(1, AR_MCI_COMMAND2_RESET_TX);
988 	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
989 
990 	udelay(1);
991 
992 	regval &= ~SM(1, AR_MCI_COMMAND2_RESET_TX);
993 	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
994 
995 	if (is_full_sleep) {
996 		ar9003_mci_mute_bt(ah);
997 		udelay(100);
998 	}
999 
1000 	/* Check pending GPM msg before MCI Reset Rx */
1001 	ar9003_mci_check_gpm_offset(ah);
1002 
1003 	regval |= SM(1, AR_MCI_COMMAND2_RESET_RX);
1004 	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
1005 	udelay(1);
1006 	regval &= ~SM(1, AR_MCI_COMMAND2_RESET_RX);
1007 	REG_WRITE(ah, AR_MCI_COMMAND2, regval);
1008 
1009 	/* Init GPM offset after MCI Reset Rx */
1010 	ar9003_mci_state(ah, MCI_STATE_INIT_GPM_OFFSET);
1011 
1012 	REG_WRITE(ah, AR_MCI_MSG_ATTRIBUTES_TABLE,
1013 		  (SM(0xe801, AR_MCI_MSG_ATTRIBUTES_TABLE_INVALID_HDR) |
1014 		   SM(0x0000, AR_MCI_MSG_ATTRIBUTES_TABLE_CHECKSUM)));
1015 
1016 	if (MCI_ANT_ARCH_PA_LNA_SHARED(mci))
1017 		REG_CLR_BIT(ah, AR_MCI_TX_CTRL,
1018 			    AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
1019 	else
1020 		REG_SET_BIT(ah, AR_MCI_TX_CTRL,
1021 			    AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
1022 
1023 	ar9003_mci_observation_set_up(ah);
1024 
1025 	mci->ready = true;
1026 	ar9003_mci_prep_interface(ah);
1027 	ar9003_mci_stat_setup(ah);
1028 
1029 	if (en_int)
1030 		ar9003_mci_enable_interrupt(ah);
1031 
1032 	if (ath9k_hw_is_aic_enabled(ah))
1033 		ar9003_aic_start_normal(ah);
1034 
1035 	return 0;
1036 }
1037 
ar9003_mci_stop_bt(struct ath_hw * ah,bool save_fullsleep)1038 void ar9003_mci_stop_bt(struct ath_hw *ah, bool save_fullsleep)
1039 {
1040 	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
1041 
1042 	ar9003_mci_disable_interrupt(ah);
1043 
1044 	if (mci_hw->ready && !save_fullsleep) {
1045 		ar9003_mci_mute_bt(ah);
1046 		udelay(20);
1047 		REG_WRITE(ah, AR_BTCOEX_CTRL, 0);
1048 	}
1049 
1050 	mci_hw->bt_state = MCI_BT_SLEEP;
1051 	mci_hw->ready = false;
1052 }
1053 
ar9003_mci_send_2g5g_status(struct ath_hw * ah,bool wait_done)1054 static void ar9003_mci_send_2g5g_status(struct ath_hw *ah, bool wait_done)
1055 {
1056 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1057 	u32 to_set, to_clear;
1058 
1059 	if (!mci->update_2g5g || (mci->bt_state == MCI_BT_SLEEP))
1060 		return;
1061 
1062 	if (mci->is_2g) {
1063 		to_clear = MCI_2G_FLAGS_CLEAR_MASK;
1064 		to_set = MCI_2G_FLAGS_SET_MASK;
1065 	} else {
1066 		to_clear = MCI_5G_FLAGS_CLEAR_MASK;
1067 		to_set = MCI_5G_FLAGS_SET_MASK;
1068 	}
1069 
1070 	if (to_clear)
1071 		ar9003_mci_send_coex_bt_flags(ah, wait_done,
1072 					      MCI_GPM_COEX_BT_FLAGS_CLEAR,
1073 					      to_clear);
1074 	if (to_set)
1075 		ar9003_mci_send_coex_bt_flags(ah, wait_done,
1076 					      MCI_GPM_COEX_BT_FLAGS_SET,
1077 					      to_set);
1078 }
1079 
ar9003_mci_queue_unsent_gpm(struct ath_hw * ah,u8 header,u32 * payload,bool queue)1080 static void ar9003_mci_queue_unsent_gpm(struct ath_hw *ah, u8 header,
1081 					u32 *payload, bool queue)
1082 {
1083 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1084 	u8 type, opcode;
1085 
1086 	/* check if the message is to be queued */
1087 	if (header != MCI_GPM)
1088 		return;
1089 
1090 	type = MCI_GPM_TYPE(payload);
1091 	opcode = MCI_GPM_OPCODE(payload);
1092 
1093 	if (type != MCI_GPM_COEX_AGENT)
1094 		return;
1095 
1096 	switch (opcode) {
1097 	case MCI_GPM_COEX_BT_UPDATE_FLAGS:
1098 		if (*(((u8 *)payload) + MCI_GPM_COEX_B_BT_FLAGS_OP) ==
1099 		    MCI_GPM_COEX_BT_FLAGS_READ)
1100 			break;
1101 
1102 		mci->update_2g5g = queue;
1103 
1104 		break;
1105 	case MCI_GPM_COEX_WLAN_CHANNELS:
1106 		mci->wlan_channels_update = queue;
1107 		break;
1108 	case MCI_GPM_COEX_HALT_BT_GPM:
1109 		if (*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) ==
1110 		    MCI_GPM_COEX_BT_GPM_UNHALT) {
1111 			mci->unhalt_bt_gpm = queue;
1112 
1113 			if (!queue)
1114 				mci->halted_bt_gpm = false;
1115 		}
1116 
1117 		if (*(((u8 *)payload) + MCI_GPM_COEX_B_HALT_STATE) ==
1118 				MCI_GPM_COEX_BT_GPM_HALT) {
1119 
1120 			mci->halted_bt_gpm = !queue;
1121 		}
1122 
1123 		break;
1124 	default:
1125 		break;
1126 	}
1127 }
1128 
ar9003_mci_2g5g_switch(struct ath_hw * ah,bool force)1129 void ar9003_mci_2g5g_switch(struct ath_hw *ah, bool force)
1130 {
1131 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1132 
1133 	if (!mci->update_2g5g && !force)
1134 		return;
1135 
1136 	if (mci->is_2g) {
1137 		ar9003_mci_send_2g5g_status(ah, true);
1138 		ar9003_mci_send_lna_transfer(ah, true);
1139 		udelay(5);
1140 
1141 		REG_CLR_BIT(ah, AR_MCI_TX_CTRL,
1142 			    AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
1143 		REG_CLR_BIT(ah, AR_PHY_GLB_CONTROL,
1144 			    AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
1145 
1146 		if (!(mci->config & ATH_MCI_CONFIG_DISABLE_OSLA))
1147 			ar9003_mci_osla_setup(ah, true);
1148 
1149 		if (AR_SREV_9462(ah))
1150 			REG_WRITE(ah, AR_SELFGEN_MASK, 0x02);
1151 	} else {
1152 		ar9003_mci_send_lna_take(ah, true);
1153 		udelay(5);
1154 
1155 		REG_SET_BIT(ah, AR_MCI_TX_CTRL,
1156 			    AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
1157 		REG_SET_BIT(ah, AR_PHY_GLB_CONTROL,
1158 			    AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
1159 
1160 		ar9003_mci_osla_setup(ah, false);
1161 		ar9003_mci_send_2g5g_status(ah, true);
1162 	}
1163 }
1164 
ar9003_mci_send_message(struct ath_hw * ah,u8 header,u32 flag,u32 * payload,u8 len,bool wait_done,bool check_bt)1165 bool ar9003_mci_send_message(struct ath_hw *ah, u8 header, u32 flag,
1166 			     u32 *payload, u8 len, bool wait_done,
1167 			     bool check_bt)
1168 {
1169 	struct ath_common *common = ath9k_hw_common(ah);
1170 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1171 	bool msg_sent = false;
1172 	u32 regval;
1173 	u32 saved_mci_int_en;
1174 	int i;
1175 
1176 	saved_mci_int_en = REG_READ(ah, AR_MCI_INTERRUPT_EN);
1177 	regval = REG_READ(ah, AR_BTCOEX_CTRL);
1178 
1179 	if ((regval == 0xdeadbeef) || !(regval & AR_BTCOEX_CTRL_MCI_MODE_EN)) {
1180 		ath_dbg(common, MCI,
1181 			"MCI Not sending 0x%x. MCI is not enabled. full_sleep = %d\n",
1182 			header, (ah->power_mode == ATH9K_PM_FULL_SLEEP) ? 1 : 0);
1183 		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
1184 		return false;
1185 	} else if (check_bt && (mci->bt_state == MCI_BT_SLEEP)) {
1186 		ath_dbg(common, MCI,
1187 			"MCI Don't send message 0x%x. BT is in sleep state\n",
1188 			header);
1189 		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
1190 		return false;
1191 	}
1192 
1193 	if (wait_done)
1194 		REG_WRITE(ah, AR_MCI_INTERRUPT_EN, 0);
1195 
1196 	/* Need to clear SW_MSG_DONE raw bit before wait */
1197 
1198 	REG_WRITE(ah, AR_MCI_INTERRUPT_RAW,
1199 		  (AR_MCI_INTERRUPT_SW_MSG_DONE |
1200 		   AR_MCI_INTERRUPT_MSG_FAIL_MASK));
1201 
1202 	if (payload) {
1203 		for (i = 0; (i * 4) < len; i++)
1204 			REG_WRITE(ah, (AR_MCI_TX_PAYLOAD0 + i * 4),
1205 				  *(payload + i));
1206 	}
1207 
1208 	REG_WRITE(ah, AR_MCI_COMMAND0,
1209 		  (SM((flag & MCI_FLAG_DISABLE_TIMESTAMP),
1210 		      AR_MCI_COMMAND0_DISABLE_TIMESTAMP) |
1211 		   SM(len, AR_MCI_COMMAND0_LEN) |
1212 		   SM(header, AR_MCI_COMMAND0_HEADER)));
1213 
1214 	if (wait_done &&
1215 	    !(ar9003_mci_wait_for_interrupt(ah, AR_MCI_INTERRUPT_RAW,
1216 					    AR_MCI_INTERRUPT_SW_MSG_DONE, 500)))
1217 		ar9003_mci_queue_unsent_gpm(ah, header, payload, true);
1218 	else {
1219 		ar9003_mci_queue_unsent_gpm(ah, header, payload, false);
1220 		msg_sent = true;
1221 	}
1222 
1223 	if (wait_done)
1224 		REG_WRITE(ah, AR_MCI_INTERRUPT_EN, saved_mci_int_en);
1225 
1226 	return msg_sent;
1227 }
1228 EXPORT_SYMBOL(ar9003_mci_send_message);
1229 
ar9003_mci_init_cal_req(struct ath_hw * ah,bool * is_reusable)1230 void ar9003_mci_init_cal_req(struct ath_hw *ah, bool *is_reusable)
1231 {
1232 	struct ath_common *common = ath9k_hw_common(ah);
1233 	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
1234 	u32 pld[4] = {0, 0, 0, 0};
1235 
1236 	if ((mci_hw->bt_state != MCI_BT_AWAKE) ||
1237 	    (mci_hw->config & ATH_MCI_CONFIG_DISABLE_MCI_CAL))
1238 		return;
1239 
1240 	MCI_GPM_SET_CAL_TYPE(pld, MCI_GPM_WLAN_CAL_REQ);
1241 	pld[MCI_GPM_WLAN_CAL_W_SEQUENCE] = mci_hw->wlan_cal_seq++;
1242 
1243 	ar9003_mci_send_message(ah, MCI_GPM, 0, pld, 16, true, false);
1244 
1245 	if (ar9003_mci_wait_for_gpm(ah, MCI_GPM_BT_CAL_GRANT, 0, 50000)) {
1246 		ath_dbg(common, MCI, "MCI BT_CAL_GRANT received\n");
1247 	} else {
1248 		*is_reusable = false;
1249 		ath_dbg(common, MCI, "MCI BT_CAL_GRANT not received\n");
1250 	}
1251 }
1252 
ar9003_mci_init_cal_done(struct ath_hw * ah)1253 void ar9003_mci_init_cal_done(struct ath_hw *ah)
1254 {
1255 	struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
1256 	u32 pld[4] = {0, 0, 0, 0};
1257 
1258 	if ((mci_hw->bt_state != MCI_BT_AWAKE) ||
1259 	    (mci_hw->config & ATH_MCI_CONFIG_DISABLE_MCI_CAL))
1260 		return;
1261 
1262 	MCI_GPM_SET_CAL_TYPE(pld, MCI_GPM_WLAN_CAL_DONE);
1263 	pld[MCI_GPM_WLAN_CAL_W_SEQUENCE] = mci_hw->wlan_cal_done++;
1264 	ar9003_mci_send_message(ah, MCI_GPM, 0, pld, 16, true, false);
1265 }
1266 
ar9003_mci_setup(struct ath_hw * ah,u32 gpm_addr,void * gpm_buf,u16 len,u32 sched_addr)1267 int ar9003_mci_setup(struct ath_hw *ah, u32 gpm_addr, void *gpm_buf,
1268 		     u16 len, u32 sched_addr)
1269 {
1270 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1271 
1272 	mci->gpm_addr = gpm_addr;
1273 	mci->gpm_buf = gpm_buf;
1274 	mci->gpm_len = len;
1275 	mci->sched_addr = sched_addr;
1276 
1277 	return ar9003_mci_reset(ah, true, true, true);
1278 }
1279 EXPORT_SYMBOL(ar9003_mci_setup);
1280 
ar9003_mci_cleanup(struct ath_hw * ah)1281 void ar9003_mci_cleanup(struct ath_hw *ah)
1282 {
1283 	/* Turn off MCI and Jupiter mode. */
1284 	REG_WRITE(ah, AR_BTCOEX_CTRL, 0x00);
1285 	ar9003_mci_disable_interrupt(ah);
1286 }
1287 EXPORT_SYMBOL(ar9003_mci_cleanup);
1288 
ar9003_mci_state(struct ath_hw * ah,u32 state_type)1289 u32 ar9003_mci_state(struct ath_hw *ah, u32 state_type)
1290 {
1291 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1292 	u32 value = 0, tsf;
1293 	u8 query_type;
1294 
1295 	switch (state_type) {
1296 	case MCI_STATE_ENABLE:
1297 		if (mci->ready) {
1298 			value = REG_READ(ah, AR_BTCOEX_CTRL);
1299 
1300 			if ((value == 0xdeadbeef) || (value == 0xffffffff))
1301 				value = 0;
1302 		}
1303 		value &= AR_BTCOEX_CTRL_MCI_MODE_EN;
1304 		break;
1305 	case MCI_STATE_INIT_GPM_OFFSET:
1306 		value = MS(REG_READ(ah, AR_MCI_GPM_1), AR_MCI_GPM_WRITE_PTR);
1307 
1308 		if (value < mci->gpm_len)
1309 			mci->gpm_idx = value;
1310 		else
1311 			mci->gpm_idx = 0;
1312 		break;
1313 	case MCI_STATE_LAST_SCHD_MSG_OFFSET:
1314 		value = MS(REG_READ(ah, AR_MCI_RX_STATUS),
1315 				    AR_MCI_RX_LAST_SCHD_MSG_INDEX);
1316 		/* Make it in bytes */
1317 		value <<= 4;
1318 		break;
1319 	case MCI_STATE_REMOTE_SLEEP:
1320 		value = MS(REG_READ(ah, AR_MCI_RX_STATUS),
1321 			   AR_MCI_RX_REMOTE_SLEEP) ?
1322 			MCI_BT_SLEEP : MCI_BT_AWAKE;
1323 		break;
1324 	case MCI_STATE_SET_BT_AWAKE:
1325 		mci->bt_state = MCI_BT_AWAKE;
1326 		ar9003_mci_send_coex_version_query(ah, true);
1327 		ar9003_mci_send_coex_wlan_channels(ah, true);
1328 
1329 		if (mci->unhalt_bt_gpm)
1330 			ar9003_mci_send_coex_halt_bt_gpm(ah, false, true);
1331 
1332 		ar9003_mci_2g5g_switch(ah, false);
1333 		break;
1334 	case MCI_STATE_RESET_REQ_WAKE:
1335 		ar9003_mci_reset_req_wakeup(ah);
1336 		mci->update_2g5g = true;
1337 
1338 		if (mci->config & ATH_MCI_CONFIG_MCI_OBS_MASK) {
1339 			/* Check if we still have control of the GPIOs */
1340 			if ((REG_READ(ah, AR_GLB_GPIO_CONTROL) &
1341 			     ATH_MCI_CONFIG_MCI_OBS_GPIO) !=
1342 			    ATH_MCI_CONFIG_MCI_OBS_GPIO) {
1343 				ar9003_mci_observation_set_up(ah);
1344 			}
1345 		}
1346 		break;
1347 	case MCI_STATE_SEND_WLAN_COEX_VERSION:
1348 		ar9003_mci_send_coex_version_response(ah, true);
1349 		break;
1350 	case MCI_STATE_SEND_VERSION_QUERY:
1351 		ar9003_mci_send_coex_version_query(ah, true);
1352 		break;
1353 	case MCI_STATE_SEND_STATUS_QUERY:
1354 		query_type = MCI_GPM_COEX_QUERY_BT_TOPOLOGY;
1355 		ar9003_mci_send_coex_bt_status_query(ah, true, query_type);
1356 		break;
1357 	case MCI_STATE_RECOVER_RX:
1358 		tsf = ath9k_hw_gettsf32(ah);
1359 		if ((tsf - mci->last_recovery) <= MCI_RECOVERY_DUR_TSF) {
1360 			ath_dbg(ath9k_hw_common(ah), MCI,
1361 				"(MCI) ignore Rx recovery\n");
1362 			break;
1363 		}
1364 		ath_dbg(ath9k_hw_common(ah), MCI, "(MCI) RECOVER RX\n");
1365 		mci->last_recovery = tsf;
1366 		ar9003_mci_prep_interface(ah);
1367 		mci->query_bt = true;
1368 		mci->need_flush_btinfo = true;
1369 		ar9003_mci_send_coex_wlan_channels(ah, true);
1370 		ar9003_mci_2g5g_switch(ah, false);
1371 		break;
1372 	case MCI_STATE_NEED_FTP_STOMP:
1373 		value = !(mci->config & ATH_MCI_CONFIG_DISABLE_FTP_STOMP);
1374 		break;
1375 	case MCI_STATE_NEED_FLUSH_BT_INFO:
1376 		value = (!mci->unhalt_bt_gpm && mci->need_flush_btinfo) ? 1 : 0;
1377 		mci->need_flush_btinfo = false;
1378 		break;
1379 	case MCI_STATE_AIC_CAL:
1380 		if (ath9k_hw_is_aic_enabled(ah))
1381 			value = ar9003_aic_calibration(ah);
1382 		break;
1383 	case MCI_STATE_AIC_START:
1384 		if (ath9k_hw_is_aic_enabled(ah))
1385 			ar9003_aic_start_normal(ah);
1386 		break;
1387 	case MCI_STATE_AIC_CAL_RESET:
1388 		if (ath9k_hw_is_aic_enabled(ah))
1389 			value = ar9003_aic_cal_reset(ah);
1390 		break;
1391 	case MCI_STATE_AIC_CAL_SINGLE:
1392 		if (ath9k_hw_is_aic_enabled(ah))
1393 			value = ar9003_aic_calibration_single(ah);
1394 		break;
1395 	default:
1396 		break;
1397 	}
1398 
1399 	return value;
1400 }
1401 EXPORT_SYMBOL(ar9003_mci_state);
1402 
ar9003_mci_bt_gain_ctrl(struct ath_hw * ah)1403 void ar9003_mci_bt_gain_ctrl(struct ath_hw *ah)
1404 {
1405 	struct ath_common *common = ath9k_hw_common(ah);
1406 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1407 
1408 	ath_dbg(common, MCI, "Give LNA and SPDT control to BT\n");
1409 
1410 	ar9003_mci_send_lna_take(ah, true);
1411 	udelay(50);
1412 
1413 	REG_SET_BIT(ah, AR_PHY_GLB_CONTROL, AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
1414 	mci->is_2g = false;
1415 	mci->update_2g5g = true;
1416 	ar9003_mci_send_2g5g_status(ah, true);
1417 
1418 	/* Force another 2g5g update at next scanning */
1419 	mci->update_2g5g = true;
1420 }
1421 
ar9003_mci_set_power_awake(struct ath_hw * ah)1422 void ar9003_mci_set_power_awake(struct ath_hw *ah)
1423 {
1424 	u32 btcoex_ctrl2, diag_sw;
1425 	int i;
1426 	u8 lna_ctrl, bt_sleep;
1427 
1428 	for (i = 0; i < AH_WAIT_TIMEOUT; i++) {
1429 		btcoex_ctrl2 = REG_READ(ah, AR_BTCOEX_CTRL2);
1430 		if (btcoex_ctrl2 != 0xdeadbeef)
1431 			break;
1432 		udelay(AH_TIME_QUANTUM);
1433 	}
1434 	REG_WRITE(ah, AR_BTCOEX_CTRL2, (btcoex_ctrl2 | BIT(23)));
1435 
1436 	for (i = 0; i < AH_WAIT_TIMEOUT; i++) {
1437 		diag_sw = REG_READ(ah, AR_DIAG_SW);
1438 		if (diag_sw != 0xdeadbeef)
1439 			break;
1440 		udelay(AH_TIME_QUANTUM);
1441 	}
1442 	REG_WRITE(ah, AR_DIAG_SW, (diag_sw | BIT(27) | BIT(19) | BIT(18)));
1443 	lna_ctrl = REG_READ(ah, AR_OBS_BUS_CTRL) & 0x3;
1444 	bt_sleep = MS(REG_READ(ah, AR_MCI_RX_STATUS), AR_MCI_RX_REMOTE_SLEEP);
1445 
1446 	REG_WRITE(ah, AR_BTCOEX_CTRL2, btcoex_ctrl2);
1447 	REG_WRITE(ah, AR_DIAG_SW, diag_sw);
1448 
1449 	if (bt_sleep && (lna_ctrl == 2)) {
1450 		REG_SET_BIT(ah, AR_BTCOEX_RC, 0x1);
1451 		REG_CLR_BIT(ah, AR_BTCOEX_RC, 0x1);
1452 		udelay(50);
1453 	}
1454 }
1455 
ar9003_mci_check_gpm_offset(struct ath_hw * ah)1456 void ar9003_mci_check_gpm_offset(struct ath_hw *ah)
1457 {
1458 	struct ath_common *common = ath9k_hw_common(ah);
1459 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1460 	u32 offset;
1461 
1462 	/*
1463 	 * This should only be called before "MAC Warm Reset" or "MCI Reset Rx".
1464 	 */
1465 	offset = MS(REG_READ(ah, AR_MCI_GPM_1), AR_MCI_GPM_WRITE_PTR);
1466 	if (mci->gpm_idx == offset)
1467 		return;
1468 	ath_dbg(common, MCI, "GPM cached write pointer mismatch %d %d\n",
1469 		mci->gpm_idx, offset);
1470 	mci->query_bt = true;
1471 	mci->need_flush_btinfo = true;
1472 	mci->gpm_idx = 0;
1473 }
1474 
ar9003_mci_get_next_gpm_offset(struct ath_hw * ah,u32 * more)1475 u32 ar9003_mci_get_next_gpm_offset(struct ath_hw *ah, u32 *more)
1476 {
1477 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1478 	u32 offset, more_gpm = 0, gpm_ptr;
1479 
1480 	/*
1481 	 * This could be useful to avoid new GPM message interrupt which
1482 	 * may lead to spurious interrupt after power sleep, or multiple
1483 	 * entry of ath_mci_intr().
1484 	 * Adding empty GPM check by returning HAL_MCI_GPM_INVALID can
1485 	 * alleviate this effect, but clearing GPM RX interrupt bit is
1486 	 * safe, because whether this is called from hw or driver code
1487 	 * there must be an interrupt bit set/triggered initially
1488 	 */
1489 	REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW,
1490 			AR_MCI_INTERRUPT_RX_MSG_GPM);
1491 
1492 	gpm_ptr = MS(REG_READ(ah, AR_MCI_GPM_1), AR_MCI_GPM_WRITE_PTR);
1493 	offset = gpm_ptr;
1494 
1495 	if (!offset)
1496 		offset = mci->gpm_len - 1;
1497 	else if (offset >= mci->gpm_len) {
1498 		if (offset != 0xFFFF)
1499 			offset = 0;
1500 	} else {
1501 		offset--;
1502 	}
1503 
1504 	if ((offset == 0xFFFF) || (gpm_ptr == mci->gpm_idx)) {
1505 		offset = MCI_GPM_INVALID;
1506 		more_gpm = MCI_GPM_NOMORE;
1507 		goto out;
1508 	}
1509 	for (;;) {
1510 		u32 temp_index;
1511 
1512 		/* skip reserved GPM if any */
1513 
1514 		if (offset != mci->gpm_idx)
1515 			more_gpm = MCI_GPM_MORE;
1516 		else
1517 			more_gpm = MCI_GPM_NOMORE;
1518 
1519 		temp_index = mci->gpm_idx;
1520 
1521 		if (temp_index >= mci->gpm_len)
1522 			temp_index = 0;
1523 
1524 		mci->gpm_idx++;
1525 
1526 		if (mci->gpm_idx >= mci->gpm_len)
1527 			mci->gpm_idx = 0;
1528 
1529 		if (ar9003_mci_is_gpm_valid(ah, temp_index)) {
1530 			offset = temp_index;
1531 			break;
1532 		}
1533 
1534 		if (more_gpm == MCI_GPM_NOMORE) {
1535 			offset = MCI_GPM_INVALID;
1536 			break;
1537 		}
1538 	}
1539 
1540 	if (offset != MCI_GPM_INVALID)
1541 		offset <<= 4;
1542 out:
1543 	if (more)
1544 		*more = more_gpm;
1545 
1546 	return offset;
1547 }
1548 EXPORT_SYMBOL(ar9003_mci_get_next_gpm_offset);
1549 
ar9003_mci_set_bt_version(struct ath_hw * ah,u8 major,u8 minor)1550 void ar9003_mci_set_bt_version(struct ath_hw *ah, u8 major, u8 minor)
1551 {
1552 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1553 
1554 	mci->bt_ver_major = major;
1555 	mci->bt_ver_minor = minor;
1556 	mci->bt_version_known = true;
1557 	ath_dbg(ath9k_hw_common(ah), MCI, "MCI BT version set: %d.%d\n",
1558 		mci->bt_ver_major, mci->bt_ver_minor);
1559 }
1560 EXPORT_SYMBOL(ar9003_mci_set_bt_version);
1561 
ar9003_mci_send_wlan_channels(struct ath_hw * ah)1562 void ar9003_mci_send_wlan_channels(struct ath_hw *ah)
1563 {
1564 	struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
1565 
1566 	mci->wlan_channels_update = true;
1567 	ar9003_mci_send_coex_wlan_channels(ah, true);
1568 }
1569 EXPORT_SYMBOL(ar9003_mci_send_wlan_channels);
1570 
ar9003_mci_get_max_txpower(struct ath_hw * ah,u8 ctlmode)1571 u16 ar9003_mci_get_max_txpower(struct ath_hw *ah, u8 ctlmode)
1572 {
1573 	if (!ah->btcoex_hw.mci.concur_tx)
1574 		goto out;
1575 
1576 	if (ctlmode == CTL_2GHT20)
1577 		return ATH_BTCOEX_HT20_MAX_TXPOWER;
1578 	else if (ctlmode == CTL_2GHT40)
1579 		return ATH_BTCOEX_HT40_MAX_TXPOWER;
1580 
1581 out:
1582 	return -1;
1583 }
1584