xref: /openbmc/linux/sound/soc/codecs/wm2000.c (revision 9abcd240)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * wm2000.c  --  WM2000 ALSA Soc Audio driver
4  *
5  * Copyright 2008-2011 Wolfson Microelectronics PLC.
6  *
7  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8  *
9  * The download image for the WM2000 will be requested as
10  * 'wm2000_anc.bin' by default (overridable via platform data) at
11  * runtime and is expected to be in flat binary format.  This is
12  * generated by Wolfson configuration tools and includes
13  * system-specific calibration information.  If supplied as a
14  * sequence of ASCII-encoded hexidecimal bytes this can be converted
15  * into a flat binary with a command such as this on the command line:
16  *
17  * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }'
18  *                 < file  > wm2000_anc.bin
19  */
20 
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/firmware.h>
26 #include <linux/clk.h>
27 #include <linux/delay.h>
28 #include <linux/pm.h>
29 #include <linux/i2c.h>
30 #include <linux/regmap.h>
31 #include <linux/debugfs.h>
32 #include <linux/regulator/consumer.h>
33 #include <linux/slab.h>
34 #include <sound/core.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
37 #include <sound/soc.h>
38 #include <sound/initval.h>
39 #include <sound/tlv.h>
40 
41 #include <sound/wm2000.h>
42 
43 #include "wm2000.h"
44 
45 #define WM2000_NUM_SUPPLIES 3
46 
47 static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {
48 	"SPKVDD",
49 	"DBVDD",
50 	"DCVDD",
51 };
52 
53 enum wm2000_anc_mode {
54 	ANC_ACTIVE = 0,
55 	ANC_BYPASS = 1,
56 	ANC_STANDBY = 2,
57 	ANC_OFF = 3,
58 };
59 
60 struct wm2000_priv {
61 	struct i2c_client *i2c;
62 	struct regmap *regmap;
63 	struct clk *mclk;
64 
65 	struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES];
66 
67 	enum wm2000_anc_mode anc_mode;
68 
69 	unsigned int anc_active:1;
70 	unsigned int anc_eng_ena:1;
71 	unsigned int spk_ena:1;
72 
73 	unsigned int speech_clarity:1;
74 
75 	int anc_download_size;
76 	char *anc_download;
77 
78 	struct mutex lock;
79 };
80 
wm2000_write(struct i2c_client * i2c,unsigned int reg,unsigned int value)81 static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
82 			unsigned int value)
83 {
84 	struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
85 	return regmap_write(wm2000->regmap, reg, value);
86 }
87 
wm2000_reset(struct wm2000_priv * wm2000)88 static void wm2000_reset(struct wm2000_priv *wm2000)
89 {
90 	struct i2c_client *i2c = wm2000->i2c;
91 
92 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
93 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
94 	wm2000_write(i2c, WM2000_REG_ID1, 0);
95 
96 	wm2000->anc_mode = ANC_OFF;
97 }
98 
wm2000_poll_bit(struct i2c_client * i2c,unsigned int reg,u8 mask)99 static int wm2000_poll_bit(struct i2c_client *i2c,
100 			   unsigned int reg, u8 mask)
101 {
102 	struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
103 	int timeout = 4000;
104 	unsigned int val;
105 
106 	regmap_read(wm2000->regmap, reg, &val);
107 
108 	while (!(val & mask) && --timeout) {
109 		msleep(1);
110 		regmap_read(wm2000->regmap, reg, &val);
111 	}
112 
113 	if (timeout == 0)
114 		return 0;
115 	else
116 		return 1;
117 }
118 
wm2000_power_up(struct i2c_client * i2c,int analogue)119 static int wm2000_power_up(struct i2c_client *i2c, int analogue)
120 {
121 	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
122 	unsigned long rate;
123 	unsigned int val;
124 	int ret;
125 
126 	if (WARN_ON(wm2000->anc_mode != ANC_OFF))
127 		return -EINVAL;
128 
129 	dev_dbg(&i2c->dev, "Beginning power up\n");
130 
131 	ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
132 	if (ret != 0) {
133 		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
134 		return ret;
135 	}
136 
137 	rate = clk_get_rate(wm2000->mclk);
138 	if (rate <= 13500000) {
139 		dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
140 		wm2000_write(i2c, WM2000_REG_SYS_CTL2,
141 			     WM2000_MCLK_DIV2_ENA_CLR);
142 	} else {
143 		dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
144 		wm2000_write(i2c, WM2000_REG_SYS_CTL2,
145 			     WM2000_MCLK_DIV2_ENA_SET);
146 	}
147 
148 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
149 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
150 
151 	/* Wait for ANC engine to become ready */
152 	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
153 			     WM2000_ANC_ENG_IDLE)) {
154 		dev_err(&i2c->dev, "ANC engine failed to reset\n");
155 		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
156 		return -ETIMEDOUT;
157 	}
158 
159 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
160 			     WM2000_STATUS_BOOT_COMPLETE)) {
161 		dev_err(&i2c->dev, "ANC engine failed to initialise\n");
162 		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
163 		return -ETIMEDOUT;
164 	}
165 
166 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
167 
168 	/* Open code download of the data since it is the only bulk
169 	 * write we do. */
170 	dev_dbg(&i2c->dev, "Downloading %d bytes\n",
171 		wm2000->anc_download_size - 2);
172 
173 	ret = i2c_master_send(i2c, wm2000->anc_download,
174 			      wm2000->anc_download_size);
175 	if (ret < 0) {
176 		dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
177 		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
178 		return ret;
179 	}
180 	if (ret != wm2000->anc_download_size) {
181 		dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
182 			ret, wm2000->anc_download_size);
183 		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
184 		return -EIO;
185 	}
186 
187 	dev_dbg(&i2c->dev, "Download complete\n");
188 
189 	if (analogue) {
190 		wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
191 
192 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
193 			     WM2000_MODE_ANA_SEQ_INCLUDE |
194 			     WM2000_MODE_MOUSE_ENABLE |
195 			     WM2000_MODE_THERMAL_ENABLE);
196 	} else {
197 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
198 			     WM2000_MODE_MOUSE_ENABLE |
199 			     WM2000_MODE_THERMAL_ENABLE);
200 	}
201 
202 	ret = regmap_read(wm2000->regmap, WM2000_REG_SPEECH_CLARITY, &val);
203 	if (ret != 0) {
204 		dev_err(&i2c->dev, "Unable to read Speech Clarity: %d\n", ret);
205 		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
206 		return ret;
207 	}
208 	if (wm2000->speech_clarity)
209 		val |= WM2000_SPEECH_CLARITY;
210 	else
211 		val &= ~WM2000_SPEECH_CLARITY;
212 	wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, val);
213 
214 	wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
215 	wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
216 
217 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
218 
219 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
220 			     WM2000_STATUS_MOUSE_ACTIVE)) {
221 		dev_err(&i2c->dev, "Timed out waiting for device\n");
222 		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
223 		return -ETIMEDOUT;
224 	}
225 
226 	dev_dbg(&i2c->dev, "ANC active\n");
227 	if (analogue)
228 		dev_dbg(&i2c->dev, "Analogue active\n");
229 	wm2000->anc_mode = ANC_ACTIVE;
230 
231 	return 0;
232 }
233 
wm2000_power_down(struct i2c_client * i2c,int analogue)234 static int wm2000_power_down(struct i2c_client *i2c, int analogue)
235 {
236 	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
237 
238 	if (analogue) {
239 		wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
240 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
241 			     WM2000_MODE_ANA_SEQ_INCLUDE |
242 			     WM2000_MODE_POWER_DOWN);
243 	} else {
244 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
245 			     WM2000_MODE_POWER_DOWN);
246 	}
247 
248 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
249 			     WM2000_STATUS_POWER_DOWN_COMPLETE)) {
250 		dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
251 		return -ETIMEDOUT;
252 	}
253 
254 	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
255 			     WM2000_ANC_ENG_IDLE)) {
256 		dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
257 		return -ETIMEDOUT;
258 	}
259 
260 	regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
261 
262 	dev_dbg(&i2c->dev, "powered off\n");
263 	wm2000->anc_mode = ANC_OFF;
264 
265 	return 0;
266 }
267 
wm2000_enter_bypass(struct i2c_client * i2c,int analogue)268 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
269 {
270 	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
271 
272 	if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE))
273 		return -EINVAL;
274 
275 	if (analogue) {
276 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
277 			     WM2000_MODE_ANA_SEQ_INCLUDE |
278 			     WM2000_MODE_THERMAL_ENABLE |
279 			     WM2000_MODE_BYPASS_ENTRY);
280 	} else {
281 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
282 			     WM2000_MODE_THERMAL_ENABLE |
283 			     WM2000_MODE_BYPASS_ENTRY);
284 	}
285 
286 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
287 			     WM2000_STATUS_ANC_DISABLED)) {
288 		dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
289 		return -ETIMEDOUT;
290 	}
291 
292 	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
293 			     WM2000_ANC_ENG_IDLE)) {
294 		dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
295 		return -ETIMEDOUT;
296 	}
297 
298 	wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
299 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
300 
301 	wm2000->anc_mode = ANC_BYPASS;
302 	dev_dbg(&i2c->dev, "bypass enabled\n");
303 
304 	return 0;
305 }
306 
wm2000_exit_bypass(struct i2c_client * i2c,int analogue)307 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
308 {
309 	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
310 
311 	if (WARN_ON(wm2000->anc_mode != ANC_BYPASS))
312 		return -EINVAL;
313 
314 	wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
315 
316 	if (analogue) {
317 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
318 			     WM2000_MODE_ANA_SEQ_INCLUDE |
319 			     WM2000_MODE_MOUSE_ENABLE |
320 			     WM2000_MODE_THERMAL_ENABLE);
321 	} else {
322 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
323 			     WM2000_MODE_MOUSE_ENABLE |
324 			     WM2000_MODE_THERMAL_ENABLE);
325 	}
326 
327 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
328 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
329 
330 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
331 			     WM2000_STATUS_MOUSE_ACTIVE)) {
332 		dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
333 		return -ETIMEDOUT;
334 	}
335 
336 	wm2000->anc_mode = ANC_ACTIVE;
337 	dev_dbg(&i2c->dev, "MOUSE active\n");
338 
339 	return 0;
340 }
341 
wm2000_enter_standby(struct i2c_client * i2c,int analogue)342 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
343 {
344 	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
345 
346 	if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE))
347 		return -EINVAL;
348 
349 	if (analogue) {
350 		wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
351 
352 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
353 			     WM2000_MODE_ANA_SEQ_INCLUDE |
354 			     WM2000_MODE_THERMAL_ENABLE |
355 			     WM2000_MODE_STANDBY_ENTRY);
356 	} else {
357 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
358 			     WM2000_MODE_THERMAL_ENABLE |
359 			     WM2000_MODE_STANDBY_ENTRY);
360 	}
361 
362 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
363 			     WM2000_STATUS_ANC_DISABLED)) {
364 		dev_err(&i2c->dev,
365 			"Timed out waiting for ANC disable after 1ms\n");
366 		return -ETIMEDOUT;
367 	}
368 
369 	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE)) {
370 		dev_err(&i2c->dev,
371 			"Timed out waiting for standby\n");
372 		return -ETIMEDOUT;
373 	}
374 
375 	wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
376 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
377 
378 	wm2000->anc_mode = ANC_STANDBY;
379 	dev_dbg(&i2c->dev, "standby\n");
380 	if (analogue)
381 		dev_dbg(&i2c->dev, "Analogue disabled\n");
382 
383 	return 0;
384 }
385 
wm2000_exit_standby(struct i2c_client * i2c,int analogue)386 static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
387 {
388 	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
389 
390 	if (WARN_ON(wm2000->anc_mode != ANC_STANDBY))
391 		return -EINVAL;
392 
393 	wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
394 
395 	if (analogue) {
396 		wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
397 
398 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
399 			     WM2000_MODE_ANA_SEQ_INCLUDE |
400 			     WM2000_MODE_THERMAL_ENABLE |
401 			     WM2000_MODE_MOUSE_ENABLE);
402 	} else {
403 		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
404 			     WM2000_MODE_THERMAL_ENABLE |
405 			     WM2000_MODE_MOUSE_ENABLE);
406 	}
407 
408 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
409 	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
410 
411 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
412 			     WM2000_STATUS_MOUSE_ACTIVE)) {
413 		dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
414 		return -ETIMEDOUT;
415 	}
416 
417 	wm2000->anc_mode = ANC_ACTIVE;
418 	dev_dbg(&i2c->dev, "MOUSE active\n");
419 	if (analogue)
420 		dev_dbg(&i2c->dev, "Analogue enabled\n");
421 
422 	return 0;
423 }
424 
425 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
426 
427 static struct {
428 	enum wm2000_anc_mode source;
429 	enum wm2000_anc_mode dest;
430 	int analogue;
431 	wm2000_mode_fn step[2];
432 } anc_transitions[] = {
433 	{
434 		.source = ANC_OFF,
435 		.dest = ANC_ACTIVE,
436 		.analogue = 1,
437 		.step = {
438 			wm2000_power_up,
439 		},
440 	},
441 	{
442 		.source = ANC_OFF,
443 		.dest = ANC_STANDBY,
444 		.step = {
445 			wm2000_power_up,
446 			wm2000_enter_standby,
447 		},
448 	},
449 	{
450 		.source = ANC_OFF,
451 		.dest = ANC_BYPASS,
452 		.analogue = 1,
453 		.step = {
454 			wm2000_power_up,
455 			wm2000_enter_bypass,
456 		},
457 	},
458 	{
459 		.source = ANC_ACTIVE,
460 		.dest = ANC_BYPASS,
461 		.analogue = 1,
462 		.step = {
463 			wm2000_enter_bypass,
464 		},
465 	},
466 	{
467 		.source = ANC_ACTIVE,
468 		.dest = ANC_STANDBY,
469 		.analogue = 1,
470 		.step = {
471 			wm2000_enter_standby,
472 		},
473 	},
474 	{
475 		.source = ANC_ACTIVE,
476 		.dest = ANC_OFF,
477 		.analogue = 1,
478 		.step = {
479 			wm2000_power_down,
480 		},
481 	},
482 	{
483 		.source = ANC_BYPASS,
484 		.dest = ANC_ACTIVE,
485 		.analogue = 1,
486 		.step = {
487 			wm2000_exit_bypass,
488 		},
489 	},
490 	{
491 		.source = ANC_BYPASS,
492 		.dest = ANC_STANDBY,
493 		.analogue = 1,
494 		.step = {
495 			wm2000_exit_bypass,
496 			wm2000_enter_standby,
497 		},
498 	},
499 	{
500 		.source = ANC_BYPASS,
501 		.dest = ANC_OFF,
502 		.step = {
503 			wm2000_exit_bypass,
504 			wm2000_power_down,
505 		},
506 	},
507 	{
508 		.source = ANC_STANDBY,
509 		.dest = ANC_ACTIVE,
510 		.analogue = 1,
511 		.step = {
512 			wm2000_exit_standby,
513 		},
514 	},
515 	{
516 		.source = ANC_STANDBY,
517 		.dest = ANC_BYPASS,
518 		.analogue = 1,
519 		.step = {
520 			wm2000_exit_standby,
521 			wm2000_enter_bypass,
522 		},
523 	},
524 	{
525 		.source = ANC_STANDBY,
526 		.dest = ANC_OFF,
527 		.step = {
528 			wm2000_exit_standby,
529 			wm2000_power_down,
530 		},
531 	},
532 };
533 
wm2000_anc_transition(struct wm2000_priv * wm2000,enum wm2000_anc_mode mode)534 static int wm2000_anc_transition(struct wm2000_priv *wm2000,
535 				 enum wm2000_anc_mode mode)
536 {
537 	struct i2c_client *i2c = wm2000->i2c;
538 	int i, j;
539 	int ret = 0;
540 
541 	if (wm2000->anc_mode == mode)
542 		return 0;
543 
544 	for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
545 		if (anc_transitions[i].source == wm2000->anc_mode &&
546 		    anc_transitions[i].dest == mode)
547 			break;
548 	if (i == ARRAY_SIZE(anc_transitions)) {
549 		dev_err(&i2c->dev, "No transition for %d->%d\n",
550 			wm2000->anc_mode, mode);
551 		return -EINVAL;
552 	}
553 
554 	/* Maintain clock while active */
555 	if (anc_transitions[i].source == ANC_OFF) {
556 		ret = clk_prepare_enable(wm2000->mclk);
557 		if (ret != 0) {
558 			dev_err(&i2c->dev, "Failed to enable MCLK: %d\n", ret);
559 			return ret;
560 		}
561 	}
562 
563 	for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
564 		if (!anc_transitions[i].step[j])
565 			break;
566 		ret = anc_transitions[i].step[j](i2c,
567 						 anc_transitions[i].analogue);
568 		if (ret != 0)
569 			break;
570 	}
571 
572 	if (anc_transitions[i].dest == ANC_OFF)
573 		clk_disable_unprepare(wm2000->mclk);
574 
575 	return ret;
576 }
577 
wm2000_anc_set_mode(struct wm2000_priv * wm2000)578 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
579 {
580 	struct i2c_client *i2c = wm2000->i2c;
581 	enum wm2000_anc_mode mode;
582 
583 	if (wm2000->anc_eng_ena && wm2000->spk_ena)
584 		if (wm2000->anc_active)
585 			mode = ANC_ACTIVE;
586 		else
587 			mode = ANC_BYPASS;
588 	else
589 		mode = ANC_STANDBY;
590 
591 	dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
592 		mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
593 		wm2000->anc_active);
594 
595 	return wm2000_anc_transition(wm2000, mode);
596 }
597 
wm2000_anc_mode_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)598 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
599 			       struct snd_ctl_elem_value *ucontrol)
600 {
601 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
602 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
603 
604 	ucontrol->value.integer.value[0] = wm2000->anc_active;
605 
606 	return 0;
607 }
608 
wm2000_anc_mode_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)609 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
610 			       struct snd_ctl_elem_value *ucontrol)
611 {
612 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
613 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
614 	unsigned int anc_active = ucontrol->value.integer.value[0];
615 	int ret;
616 
617 	if (anc_active > 1)
618 		return -EINVAL;
619 
620 	mutex_lock(&wm2000->lock);
621 
622 	wm2000->anc_active = anc_active;
623 
624 	ret = wm2000_anc_set_mode(wm2000);
625 
626 	mutex_unlock(&wm2000->lock);
627 
628 	return ret;
629 }
630 
wm2000_speaker_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)631 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
632 			      struct snd_ctl_elem_value *ucontrol)
633 {
634 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
635 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
636 
637 	ucontrol->value.integer.value[0] = wm2000->spk_ena;
638 
639 	return 0;
640 }
641 
wm2000_speaker_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)642 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
643 			      struct snd_ctl_elem_value *ucontrol)
644 {
645 	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
646 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
647 	unsigned int val = ucontrol->value.integer.value[0];
648 	int ret;
649 
650 	if (val > 1)
651 		return -EINVAL;
652 
653 	mutex_lock(&wm2000->lock);
654 
655 	wm2000->spk_ena = val;
656 
657 	ret = wm2000_anc_set_mode(wm2000);
658 
659 	mutex_unlock(&wm2000->lock);
660 
661 	return ret;
662 }
663 
664 static const struct snd_kcontrol_new wm2000_controls[] = {
665 	SOC_SINGLE("ANC Volume", WM2000_REG_ANC_GAIN_CTRL, 0, 255, 0),
666 	SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
667 			    wm2000_anc_mode_get,
668 			    wm2000_anc_mode_put),
669 	SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
670 			    wm2000_speaker_get,
671 			    wm2000_speaker_put),
672 };
673 
wm2000_anc_power_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)674 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
675 				  struct snd_kcontrol *kcontrol, int event)
676 {
677 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
678 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
679 	int ret;
680 
681 	mutex_lock(&wm2000->lock);
682 
683 	if (SND_SOC_DAPM_EVENT_ON(event))
684 		wm2000->anc_eng_ena = 1;
685 
686 	if (SND_SOC_DAPM_EVENT_OFF(event))
687 		wm2000->anc_eng_ena = 0;
688 
689 	ret = wm2000_anc_set_mode(wm2000);
690 
691 	mutex_unlock(&wm2000->lock);
692 
693 	return ret;
694 }
695 
696 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
697 /* Externally visible pins */
698 SND_SOC_DAPM_OUTPUT("SPKN"),
699 SND_SOC_DAPM_OUTPUT("SPKP"),
700 
701 SND_SOC_DAPM_INPUT("LINN"),
702 SND_SOC_DAPM_INPUT("LINP"),
703 
704 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
705 		   wm2000_anc_power_event,
706 		   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
707 };
708 
709 /* Target, Path, Source */
710 static const struct snd_soc_dapm_route wm2000_audio_map[] = {
711 	{ "SPKN", NULL, "ANC Engine" },
712 	{ "SPKP", NULL, "ANC Engine" },
713 	{ "ANC Engine", NULL, "LINN" },
714 	{ "ANC Engine", NULL, "LINP" },
715 };
716 
717 #ifdef CONFIG_PM
wm2000_suspend(struct snd_soc_component * component)718 static int wm2000_suspend(struct snd_soc_component *component)
719 {
720 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
721 
722 	return wm2000_anc_transition(wm2000, ANC_OFF);
723 }
724 
wm2000_resume(struct snd_soc_component * component)725 static int wm2000_resume(struct snd_soc_component *component)
726 {
727 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
728 
729 	return wm2000_anc_set_mode(wm2000);
730 }
731 #else
732 #define wm2000_suspend NULL
733 #define wm2000_resume NULL
734 #endif
735 
wm2000_readable_reg(struct device * dev,unsigned int reg)736 static bool wm2000_readable_reg(struct device *dev, unsigned int reg)
737 {
738 	switch (reg) {
739 	case WM2000_REG_SYS_START:
740 	case WM2000_REG_ANC_GAIN_CTRL:
741 	case WM2000_REG_MSE_TH1:
742 	case WM2000_REG_MSE_TH2:
743 	case WM2000_REG_SPEECH_CLARITY:
744 	case WM2000_REG_SYS_WATCHDOG:
745 	case WM2000_REG_ANA_VMID_PD_TIME:
746 	case WM2000_REG_ANA_VMID_PU_TIME:
747 	case WM2000_REG_CAT_FLTR_INDX:
748 	case WM2000_REG_CAT_GAIN_0:
749 	case WM2000_REG_SYS_STATUS:
750 	case WM2000_REG_SYS_MODE_CNTRL:
751 	case WM2000_REG_SYS_START0:
752 	case WM2000_REG_SYS_START1:
753 	case WM2000_REG_ID1:
754 	case WM2000_REG_ID2:
755 	case WM2000_REG_REVISON:
756 	case WM2000_REG_SYS_CTL1:
757 	case WM2000_REG_SYS_CTL2:
758 	case WM2000_REG_ANC_STAT:
759 	case WM2000_REG_IF_CTL:
760 	case WM2000_REG_ANA_MIC_CTL:
761 	case WM2000_REG_SPK_CTL:
762 		return true;
763 	default:
764 		return false;
765 	}
766 }
767 
768 static const struct regmap_config wm2000_regmap = {
769 	.reg_bits = 16,
770 	.val_bits = 8,
771 
772 	.max_register = WM2000_REG_SPK_CTL,
773 	.readable_reg = wm2000_readable_reg,
774 };
775 
wm2000_probe(struct snd_soc_component * component)776 static int wm2000_probe(struct snd_soc_component *component)
777 {
778 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
779 
780 	/* This will trigger a transition to standby mode by default */
781 	wm2000_anc_set_mode(wm2000);
782 
783 	return 0;
784 }
785 
wm2000_remove(struct snd_soc_component * component)786 static void wm2000_remove(struct snd_soc_component *component)
787 {
788 	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
789 
790 	wm2000_anc_transition(wm2000, ANC_OFF);
791 }
792 
793 static const struct snd_soc_component_driver soc_component_dev_wm2000 = {
794 	.probe			= wm2000_probe,
795 	.remove			= wm2000_remove,
796 	.suspend		= wm2000_suspend,
797 	.resume			= wm2000_resume,
798 	.controls		= wm2000_controls,
799 	.num_controls		= ARRAY_SIZE(wm2000_controls),
800 	.dapm_widgets		= wm2000_dapm_widgets,
801 	.num_dapm_widgets	= ARRAY_SIZE(wm2000_dapm_widgets),
802 	.dapm_routes		= wm2000_audio_map,
803 	.num_dapm_routes	= ARRAY_SIZE(wm2000_audio_map),
804 	.idle_bias_on		= 1,
805 	.use_pmdown_time	= 1,
806 };
807 
wm2000_i2c_probe(struct i2c_client * i2c)808 static int wm2000_i2c_probe(struct i2c_client *i2c)
809 {
810 	struct wm2000_priv *wm2000;
811 	struct wm2000_platform_data *pdata;
812 	const char *filename;
813 	const struct firmware *fw = NULL;
814 	int ret, i;
815 	unsigned int reg;
816 	u16 id;
817 
818 	wm2000 = devm_kzalloc(&i2c->dev, sizeof(*wm2000), GFP_KERNEL);
819 	if (!wm2000)
820 		return -ENOMEM;
821 
822 	mutex_init(&wm2000->lock);
823 
824 	dev_set_drvdata(&i2c->dev, wm2000);
825 
826 	wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap);
827 	if (IS_ERR(wm2000->regmap)) {
828 		ret = PTR_ERR(wm2000->regmap);
829 		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
830 			ret);
831 		goto out;
832 	}
833 
834 	for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
835 		wm2000->supplies[i].supply = wm2000_supplies[i];
836 
837 	ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
838 				      wm2000->supplies);
839 	if (ret != 0) {
840 		dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
841 		return ret;
842 	}
843 
844 	ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
845 	if (ret != 0) {
846 		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
847 		return ret;
848 	}
849 
850 	/* Verify that this is a WM2000 */
851 	ret = regmap_read(wm2000->regmap, WM2000_REG_ID1, &reg);
852 	if (ret != 0) {
853 		dev_err(&i2c->dev, "Unable to read ID1: %d\n", ret);
854 		return ret;
855 	}
856 	id = reg << 8;
857 	ret = regmap_read(wm2000->regmap, WM2000_REG_ID2, &reg);
858 	if (ret != 0) {
859 		dev_err(&i2c->dev, "Unable to read ID2: %d\n", ret);
860 		return ret;
861 	}
862 	id |= reg & 0xff;
863 
864 	if (id != 0x2000) {
865 		dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
866 		ret = -ENODEV;
867 		goto err_supplies;
868 	}
869 
870 	ret = regmap_read(wm2000->regmap, WM2000_REG_REVISON, &reg);
871 	if (ret != 0) {
872 		dev_err(&i2c->dev, "Unable to read Revision: %d\n", ret);
873 		return ret;
874 	}
875 	dev_info(&i2c->dev, "revision %c\n", reg + 'A');
876 
877 	wm2000->mclk = devm_clk_get(&i2c->dev, "MCLK");
878 	if (IS_ERR(wm2000->mclk)) {
879 		ret = PTR_ERR(wm2000->mclk);
880 		dev_err(&i2c->dev, "Failed to get MCLK: %d\n", ret);
881 		goto err_supplies;
882 	}
883 
884 	filename = "wm2000_anc.bin";
885 	pdata = dev_get_platdata(&i2c->dev);
886 	if (pdata) {
887 		wm2000->speech_clarity = !pdata->speech_enh_disable;
888 
889 		if (pdata->download_file)
890 			filename = pdata->download_file;
891 	}
892 
893 	ret = request_firmware(&fw, filename, &i2c->dev);
894 	if (ret != 0) {
895 		dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
896 		goto err_supplies;
897 	}
898 
899 	/* Pre-cook the concatenation of the register address onto the image */
900 	wm2000->anc_download_size = fw->size + 2;
901 	wm2000->anc_download = devm_kzalloc(&i2c->dev,
902 					    wm2000->anc_download_size,
903 					    GFP_KERNEL);
904 	if (wm2000->anc_download == NULL) {
905 		ret = -ENOMEM;
906 		goto err_supplies;
907 	}
908 
909 	wm2000->anc_download[0] = 0x80;
910 	wm2000->anc_download[1] = 0x00;
911 	memcpy(wm2000->anc_download + 2, fw->data, fw->size);
912 
913 	wm2000->anc_eng_ena = 1;
914 	wm2000->anc_active = 1;
915 	wm2000->spk_ena = 1;
916 	wm2000->i2c = i2c;
917 
918 	wm2000_reset(wm2000);
919 
920 	ret = devm_snd_soc_register_component(&i2c->dev,
921 					&soc_component_dev_wm2000, NULL, 0);
922 
923 err_supplies:
924 	regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
925 
926 out:
927 	release_firmware(fw);
928 	return ret;
929 }
930 
931 static const struct i2c_device_id wm2000_i2c_id[] = {
932 	{ "wm2000", 0 },
933 	{ }
934 };
935 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
936 
937 static struct i2c_driver wm2000_i2c_driver = {
938 	.driver = {
939 		.name = "wm2000",
940 	},
941 	.probe = wm2000_i2c_probe,
942 	.id_table = wm2000_i2c_id,
943 };
944 
945 module_i2c_driver(wm2000_i2c_driver);
946 
947 MODULE_DESCRIPTION("ASoC WM2000 driver");
948 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
949 MODULE_LICENSE("GPL");
950