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, ®);
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, ®);
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, ®);
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" },
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