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-rw-r--r--sound/soc/codecs/wm2000.c888
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diff --git a/sound/soc/codecs/wm2000.c b/sound/soc/codecs/wm2000.c
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1/*
2 * wm2000.c -- WM2000 ALSA Soc Audio driver
3 *
4 * Copyright 2008-2010 Wolfson Microelectronics PLC.
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * The download image for the WM2000 will be requested as
13 * 'wm2000_anc.bin' by default (overridable via platform data) at
14 * runtime and is expected to be in flat binary format. This is
15 * generated by Wolfson configuration tools and includes
16 * system-specific callibration information. If supplied as a
17 * sequence of ASCII-encoded hexidecimal bytes this can be converted
18 * into a flat binary with a command such as this on the command line:
19 *
20 * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }'
21 * < file > wm2000_anc.bin
22 */
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/version.h>
27#include <linux/kernel.h>
28#include <linux/init.h>
29#include <linux/firmware.h>
30#include <linux/delay.h>
31#include <linux/pm.h>
32#include <linux/i2c.h>
33#include <linux/platform_device.h>
34#include <linux/debugfs.h>
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/soc.h>
39#include <sound/soc-dapm.h>
40#include <sound/initval.h>
41#include <sound/tlv.h>
42
43#include <sound/wm2000.h>
44
45#include "wm2000.h"
46
47enum wm2000_anc_mode {
48 ANC_ACTIVE = 0,
49 ANC_BYPASS = 1,
50 ANC_STANDBY = 2,
51 ANC_OFF = 3,
52};
53
54struct wm2000_priv {
55 struct i2c_client *i2c;
56
57 enum wm2000_anc_mode anc_mode;
58
59 unsigned int anc_active:1;
60 unsigned int anc_eng_ena:1;
61 unsigned int spk_ena:1;
62
63 unsigned int mclk_div:1;
64 unsigned int speech_clarity:1;
65
66 int anc_download_size;
67 char *anc_download;
68};
69
70static struct i2c_client *wm2000_i2c;
71
72static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
73 unsigned int value)
74{
75 u8 data[3];
76 int ret;
77
78 data[0] = (reg >> 8) & 0xff;
79 data[1] = reg & 0xff;
80 data[2] = value & 0xff;
81
82 dev_vdbg(&i2c->dev, "write %x = %x\n", reg, value);
83
84 ret = i2c_master_send(i2c, data, 3);
85 if (ret == 3)
86 return 0;
87 if (ret < 0)
88 return ret;
89 else
90 return -EIO;
91}
92
93static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
94{
95 struct i2c_msg xfer[2];
96 u8 reg[2];
97 u8 data;
98 int ret;
99
100 /* Write register */
101 reg[0] = (r >> 8) & 0xff;
102 reg[1] = r & 0xff;
103 xfer[0].addr = i2c->addr;
104 xfer[0].flags = 0;
105 xfer[0].len = sizeof(reg);
106 xfer[0].buf = &reg[0];
107
108 /* Read data */
109 xfer[1].addr = i2c->addr;
110 xfer[1].flags = I2C_M_RD;
111 xfer[1].len = 1;
112 xfer[1].buf = &data;
113
114 ret = i2c_transfer(i2c->adapter, xfer, 2);
115 if (ret != 2) {
116 dev_err(&i2c->dev, "i2c_transfer() returned %d\n", ret);
117 return 0;
118 }
119
120 dev_vdbg(&i2c->dev, "read %x from %x\n", data, r);
121
122 return data;
123}
124
125static void wm2000_reset(struct wm2000_priv *wm2000)
126{
127 struct i2c_client *i2c = wm2000->i2c;
128
129 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
130 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
131 wm2000_write(i2c, WM2000_REG_ID1, 0);
132
133 wm2000->anc_mode = ANC_OFF;
134}
135
136static int wm2000_poll_bit(struct i2c_client *i2c,
137 unsigned int reg, u8 mask, int timeout)
138{
139 int val;
140
141 val = wm2000_read(i2c, reg);
142
143 while (!(val & mask) && --timeout) {
144 msleep(1);
145 val = wm2000_read(i2c, reg);
146 }
147
148 if (timeout == 0)
149 return 0;
150 else
151 return 1;
152}
153
154static int wm2000_power_up(struct i2c_client *i2c, int analogue)
155{
156 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
157 int ret, timeout;
158
159 BUG_ON(wm2000->anc_mode != ANC_OFF);
160
161 dev_dbg(&i2c->dev, "Beginning power up\n");
162
163 if (!wm2000->mclk_div) {
164 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
165 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
166 WM2000_MCLK_DIV2_ENA_CLR);
167 } else {
168 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
169 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
170 WM2000_MCLK_DIV2_ENA_SET);
171 }
172
173 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
174 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
175
176 /* Wait for ANC engine to become ready */
177 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
178 WM2000_ANC_ENG_IDLE, 1)) {
179 dev_err(&i2c->dev, "ANC engine failed to reset\n");
180 return -ETIMEDOUT;
181 }
182
183 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
184 WM2000_STATUS_BOOT_COMPLETE, 1)) {
185 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
186 return -ETIMEDOUT;
187 }
188
189 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
190
191 /* Open code download of the data since it is the only bulk
192 * write we do. */
193 dev_dbg(&i2c->dev, "Downloading %d bytes\n",
194 wm2000->anc_download_size - 2);
195
196 ret = i2c_master_send(i2c, wm2000->anc_download,
197 wm2000->anc_download_size);
198 if (ret < 0) {
199 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
200 return ret;
201 }
202 if (ret != wm2000->anc_download_size) {
203 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
204 ret, wm2000->anc_download_size);
205 return -EIO;
206 }
207
208 dev_dbg(&i2c->dev, "Download complete\n");
209
210 if (analogue) {
211 timeout = 248;
212 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);
213
214 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
215 WM2000_MODE_ANA_SEQ_INCLUDE |
216 WM2000_MODE_MOUSE_ENABLE |
217 WM2000_MODE_THERMAL_ENABLE);
218 } else {
219 timeout = 10;
220
221 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
222 WM2000_MODE_MOUSE_ENABLE |
223 WM2000_MODE_THERMAL_ENABLE);
224 }
225
226 ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
227 if (wm2000->speech_clarity)
228 ret &= ~WM2000_SPEECH_CLARITY;
229 else
230 ret |= WM2000_SPEECH_CLARITY;
231 wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
232
233 wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
234 wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
235
236 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
237
238 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
239 WM2000_STATUS_MOUSE_ACTIVE, timeout)) {
240 dev_err(&i2c->dev, "Timed out waiting for device after %dms\n",
241 timeout * 10);
242 return -ETIMEDOUT;
243 }
244
245 dev_dbg(&i2c->dev, "ANC active\n");
246 if (analogue)
247 dev_dbg(&i2c->dev, "Analogue active\n");
248 wm2000->anc_mode = ANC_ACTIVE;
249
250 return 0;
251}
252
253static int wm2000_power_down(struct i2c_client *i2c, int analogue)
254{
255 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
256 int timeout;
257
258 if (analogue) {
259 timeout = 248;
260 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);
261 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
262 WM2000_MODE_ANA_SEQ_INCLUDE |
263 WM2000_MODE_POWER_DOWN);
264 } else {
265 timeout = 10;
266 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
267 WM2000_MODE_POWER_DOWN);
268 }
269
270 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
271 WM2000_STATUS_POWER_DOWN_COMPLETE, timeout)) {
272 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
273 return -ETIMEDOUT;
274 }
275
276 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
277 WM2000_ANC_ENG_IDLE, 1)) {
278 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
279 return -ETIMEDOUT;
280 }
281
282 dev_dbg(&i2c->dev, "powered off\n");
283 wm2000->anc_mode = ANC_OFF;
284
285 return 0;
286}
287
288static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
289{
290 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
291
292 BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
293
294 if (analogue) {
295 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
296 WM2000_MODE_ANA_SEQ_INCLUDE |
297 WM2000_MODE_THERMAL_ENABLE |
298 WM2000_MODE_BYPASS_ENTRY);
299 } else {
300 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
301 WM2000_MODE_THERMAL_ENABLE |
302 WM2000_MODE_BYPASS_ENTRY);
303 }
304
305 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
306 WM2000_STATUS_ANC_DISABLED, 10)) {
307 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
308 return -ETIMEDOUT;
309 }
310
311 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
312 WM2000_ANC_ENG_IDLE, 1)) {
313 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
314 return -ETIMEDOUT;
315 }
316
317 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
318 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
319
320 wm2000->anc_mode = ANC_BYPASS;
321 dev_dbg(&i2c->dev, "bypass enabled\n");
322
323 return 0;
324}
325
326static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
327{
328 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
329
330 BUG_ON(wm2000->anc_mode != ANC_BYPASS);
331
332 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
333
334 if (analogue) {
335 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
336 WM2000_MODE_ANA_SEQ_INCLUDE |
337 WM2000_MODE_MOUSE_ENABLE |
338 WM2000_MODE_THERMAL_ENABLE);
339 } else {
340 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
341 WM2000_MODE_MOUSE_ENABLE |
342 WM2000_MODE_THERMAL_ENABLE);
343 }
344
345 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
346 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
347
348 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
349 WM2000_STATUS_MOUSE_ACTIVE, 10)) {
350 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
351 return -ETIMEDOUT;
352 }
353
354 wm2000->anc_mode = ANC_ACTIVE;
355 dev_dbg(&i2c->dev, "MOUSE active\n");
356
357 return 0;
358}
359
360static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
361{
362 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
363 int timeout;
364
365 BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
366
367 if (analogue) {
368 timeout = 248;
369 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);
370
371 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
372 WM2000_MODE_ANA_SEQ_INCLUDE |
373 WM2000_MODE_THERMAL_ENABLE |
374 WM2000_MODE_STANDBY_ENTRY);
375 } else {
376 timeout = 10;
377
378 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
379 WM2000_MODE_THERMAL_ENABLE |
380 WM2000_MODE_STANDBY_ENTRY);
381 }
382
383 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
384 WM2000_STATUS_ANC_DISABLED, timeout)) {
385 dev_err(&i2c->dev,
386 "Timed out waiting for ANC disable after 1ms\n");
387 return -ETIMEDOUT;
388 }
389
390 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE,
391 1)) {
392 dev_err(&i2c->dev,
393 "Timed out waiting for standby after %dms\n",
394 timeout * 10);
395 return -ETIMEDOUT;
396 }
397
398 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
399 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
400
401 wm2000->anc_mode = ANC_STANDBY;
402 dev_dbg(&i2c->dev, "standby\n");
403 if (analogue)
404 dev_dbg(&i2c->dev, "Analogue disabled\n");
405
406 return 0;
407}
408
409static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
410{
411 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
412 int timeout;
413
414 BUG_ON(wm2000->anc_mode != ANC_STANDBY);
415
416 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
417
418 if (analogue) {
419 timeout = 248;
420 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);
421
422 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
423 WM2000_MODE_ANA_SEQ_INCLUDE |
424 WM2000_MODE_THERMAL_ENABLE |
425 WM2000_MODE_MOUSE_ENABLE);
426 } else {
427 timeout = 10;
428
429 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
430 WM2000_MODE_THERMAL_ENABLE |
431 WM2000_MODE_MOUSE_ENABLE);
432 }
433
434 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
435 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
436
437 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
438 WM2000_STATUS_MOUSE_ACTIVE, timeout)) {
439 dev_err(&i2c->dev, "Timed out waiting for MOUSE after %dms\n",
440 timeout * 10);
441 return -ETIMEDOUT;
442 }
443
444 wm2000->anc_mode = ANC_ACTIVE;
445 dev_dbg(&i2c->dev, "MOUSE active\n");
446 if (analogue)
447 dev_dbg(&i2c->dev, "Analogue enabled\n");
448
449 return 0;
450}
451
452typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
453
454static struct {
455 enum wm2000_anc_mode source;
456 enum wm2000_anc_mode dest;
457 int analogue;
458 wm2000_mode_fn step[2];
459} anc_transitions[] = {
460 {
461 .source = ANC_OFF,
462 .dest = ANC_ACTIVE,
463 .analogue = 1,
464 .step = {
465 wm2000_power_up,
466 },
467 },
468 {
469 .source = ANC_OFF,
470 .dest = ANC_STANDBY,
471 .step = {
472 wm2000_power_up,
473 wm2000_enter_standby,
474 },
475 },
476 {
477 .source = ANC_OFF,
478 .dest = ANC_BYPASS,
479 .analogue = 1,
480 .step = {
481 wm2000_power_up,
482 wm2000_enter_bypass,
483 },
484 },
485 {
486 .source = ANC_ACTIVE,
487 .dest = ANC_BYPASS,
488 .analogue = 1,
489 .step = {
490 wm2000_enter_bypass,
491 },
492 },
493 {
494 .source = ANC_ACTIVE,
495 .dest = ANC_STANDBY,
496 .analogue = 1,
497 .step = {
498 wm2000_enter_standby,
499 },
500 },
501 {
502 .source = ANC_ACTIVE,
503 .dest = ANC_OFF,
504 .analogue = 1,
505 .step = {
506 wm2000_power_down,
507 },
508 },
509 {
510 .source = ANC_BYPASS,
511 .dest = ANC_ACTIVE,
512 .analogue = 1,
513 .step = {
514 wm2000_exit_bypass,
515 },
516 },
517 {
518 .source = ANC_BYPASS,
519 .dest = ANC_STANDBY,
520 .analogue = 1,
521 .step = {
522 wm2000_exit_bypass,
523 wm2000_enter_standby,
524 },
525 },
526 {
527 .source = ANC_BYPASS,
528 .dest = ANC_OFF,
529 .step = {
530 wm2000_exit_bypass,
531 wm2000_power_down,
532 },
533 },
534 {
535 .source = ANC_STANDBY,
536 .dest = ANC_ACTIVE,
537 .analogue = 1,
538 .step = {
539 wm2000_exit_standby,
540 },
541 },
542 {
543 .source = ANC_STANDBY,
544 .dest = ANC_BYPASS,
545 .analogue = 1,
546 .step = {
547 wm2000_exit_standby,
548 wm2000_enter_bypass,
549 },
550 },
551 {
552 .source = ANC_STANDBY,
553 .dest = ANC_OFF,
554 .step = {
555 wm2000_exit_standby,
556 wm2000_power_down,
557 },
558 },
559};
560
561static int wm2000_anc_transition(struct wm2000_priv *wm2000,
562 enum wm2000_anc_mode mode)
563{
564 struct i2c_client *i2c = wm2000->i2c;
565 int i, j;
566 int ret;
567
568 if (wm2000->anc_mode == mode)
569 return 0;
570
571 for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
572 if (anc_transitions[i].source == wm2000->anc_mode &&
573 anc_transitions[i].dest == mode)
574 break;
575 if (i == ARRAY_SIZE(anc_transitions)) {
576 dev_err(&i2c->dev, "No transition for %d->%d\n",
577 wm2000->anc_mode, mode);
578 return -EINVAL;
579 }
580
581 for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
582 if (!anc_transitions[i].step[j])
583 break;
584 ret = anc_transitions[i].step[j](i2c,
585 anc_transitions[i].analogue);
586 if (ret != 0)
587 return ret;
588 }
589
590 return 0;
591}
592
593static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
594{
595 struct i2c_client *i2c = wm2000->i2c;
596 enum wm2000_anc_mode mode;
597
598 if (wm2000->anc_eng_ena && wm2000->spk_ena)
599 if (wm2000->anc_active)
600 mode = ANC_ACTIVE;
601 else
602 mode = ANC_BYPASS;
603 else
604 mode = ANC_STANDBY;
605
606 dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
607 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
608 wm2000->anc_active);
609
610 return wm2000_anc_transition(wm2000, mode);
611}
612
613static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
614 struct snd_ctl_elem_value *ucontrol)
615{
616 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
617
618 ucontrol->value.enumerated.item[0] = wm2000->anc_active;
619
620 return 0;
621}
622
623static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
624 struct snd_ctl_elem_value *ucontrol)
625{
626 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
627 int anc_active = ucontrol->value.enumerated.item[0];
628
629 if (anc_active > 1)
630 return -EINVAL;
631
632 wm2000->anc_active = anc_active;
633
634 return wm2000_anc_set_mode(wm2000);
635}
636
637static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
638 struct snd_ctl_elem_value *ucontrol)
639{
640 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
641
642 ucontrol->value.enumerated.item[0] = wm2000->spk_ena;
643
644 return 0;
645}
646
647static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
648 struct snd_ctl_elem_value *ucontrol)
649{
650 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
651 int val = ucontrol->value.enumerated.item[0];
652
653 if (val > 1)
654 return -EINVAL;
655
656 wm2000->spk_ena = val;
657
658 return wm2000_anc_set_mode(wm2000);
659}
660
661static const struct snd_kcontrol_new wm2000_controls[] = {
662 SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
663 wm2000_anc_mode_get,
664 wm2000_anc_mode_put),
665 SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
666 wm2000_speaker_get,
667 wm2000_speaker_put),
668};
669
670static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
671 struct snd_kcontrol *kcontrol, int event)
672{
673 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
674
675 if (SND_SOC_DAPM_EVENT_ON(event))
676 wm2000->anc_eng_ena = 1;
677
678 if (SND_SOC_DAPM_EVENT_OFF(event))
679 wm2000->anc_eng_ena = 0;
680
681 return wm2000_anc_set_mode(wm2000);
682}
683
684static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
685/* Externally visible pins */
686SND_SOC_DAPM_OUTPUT("WM2000 SPKN"),
687SND_SOC_DAPM_OUTPUT("WM2000 SPKP"),
688
689SND_SOC_DAPM_INPUT("WM2000 LINN"),
690SND_SOC_DAPM_INPUT("WM2000 LINP"),
691
692SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
693 wm2000_anc_power_event,
694 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
695};
696
697/* Target, Path, Source */
698static const struct snd_soc_dapm_route audio_map[] = {
699 { "WM2000 SPKN", NULL, "ANC Engine" },
700 { "WM2000 SPKP", NULL, "ANC Engine" },
701 { "ANC Engine", NULL, "WM2000 LINN" },
702 { "ANC Engine", NULL, "WM2000 LINP" },
703};
704
705/* Called from the machine driver */
706int wm2000_add_controls(struct snd_soc_codec *codec)
707{
708 int ret;
709
710 if (!wm2000_i2c) {
711 pr_err("WM2000 not yet probed\n");
712 return -ENODEV;
713 }
714
715 ret = snd_soc_dapm_new_controls(codec, wm2000_dapm_widgets,
716 ARRAY_SIZE(wm2000_dapm_widgets));
717 if (ret < 0)
718 return ret;
719
720 ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
721 if (ret < 0)
722 return ret;
723
724 return snd_soc_add_controls(codec, wm2000_controls,
725 ARRAY_SIZE(wm2000_controls));
726}
727EXPORT_SYMBOL_GPL(wm2000_add_controls);
728
729static int __devinit wm2000_i2c_probe(struct i2c_client *i2c,
730 const struct i2c_device_id *i2c_id)
731{
732 struct wm2000_priv *wm2000;
733 struct wm2000_platform_data *pdata;
734 const char *filename;
735 const struct firmware *fw;
736 int reg, ret;
737 u16 id;
738
739 if (wm2000_i2c) {
740 dev_err(&i2c->dev, "Another WM2000 is already registered\n");
741 return -EINVAL;
742 }
743
744 wm2000 = kzalloc(sizeof(struct wm2000_priv), GFP_KERNEL);
745 if (wm2000 == NULL) {
746 dev_err(&i2c->dev, "Unable to allocate private data\n");
747 return -ENOMEM;
748 }
749
750 /* Verify that this is a WM2000 */
751 reg = wm2000_read(i2c, WM2000_REG_ID1);
752 id = reg << 8;
753 reg = wm2000_read(i2c, WM2000_REG_ID2);
754 id |= reg & 0xff;
755
756 if (id != 0x2000) {
757 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
758 ret = -ENODEV;
759 goto err;
760 }
761
762 reg = wm2000_read(i2c, WM2000_REG_REVISON);
763 dev_info(&i2c->dev, "revision %c\n", reg + 'A');
764
765 filename = "wm2000_anc.bin";
766 pdata = dev_get_platdata(&i2c->dev);
767 if (pdata) {
768 wm2000->mclk_div = pdata->mclkdiv2;
769 wm2000->speech_clarity = !pdata->speech_enh_disable;
770
771 if (pdata->download_file)
772 filename = pdata->download_file;
773 }
774
775 ret = request_firmware(&fw, filename, &i2c->dev);
776 if (ret != 0) {
777 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
778 goto err;
779 }
780
781 /* Pre-cook the concatenation of the register address onto the image */
782 wm2000->anc_download_size = fw->size + 2;
783 wm2000->anc_download = kmalloc(wm2000->anc_download_size, GFP_KERNEL);
784 if (wm2000->anc_download == NULL) {
785 dev_err(&i2c->dev, "Out of memory\n");
786 ret = -ENOMEM;
787 goto err_fw;
788 }
789
790 wm2000->anc_download[0] = 0x80;
791 wm2000->anc_download[1] = 0x00;
792 memcpy(wm2000->anc_download + 2, fw->data, fw->size);
793
794 release_firmware(fw);
795
796 dev_set_drvdata(&i2c->dev, wm2000);
797 wm2000->anc_eng_ena = 1;
798 wm2000->i2c = i2c;
799
800 wm2000_reset(wm2000);
801
802 /* This will trigger a transition to standby mode by default */
803 wm2000_anc_set_mode(wm2000);
804
805 wm2000_i2c = i2c;
806
807 return 0;
808
809err_fw:
810 release_firmware(fw);
811err:
812 kfree(wm2000);
813 return ret;
814}
815
816static __devexit int wm2000_i2c_remove(struct i2c_client *i2c)
817{
818 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
819
820 wm2000_anc_transition(wm2000, ANC_OFF);
821
822 wm2000_i2c = NULL;
823 kfree(wm2000->anc_download);
824 kfree(wm2000);
825
826 return 0;
827}
828
829static void wm2000_i2c_shutdown(struct i2c_client *i2c)
830{
831 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
832
833 wm2000_anc_transition(wm2000, ANC_OFF);
834}
835
836#ifdef CONFIG_PM
837static int wm2000_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg)
838{
839 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
840
841 return wm2000_anc_transition(wm2000, ANC_OFF);
842}
843
844static int wm2000_i2c_resume(struct i2c_client *i2c)
845{
846 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
847
848 return wm2000_anc_set_mode(wm2000);
849}
850#else
851#define wm2000_i2c_suspend NULL
852#define wm2000_i2c_resume NULL
853#endif
854
855static const struct i2c_device_id wm2000_i2c_id[] = {
856 { "wm2000", 0 },
857 { }
858};
859MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
860
861static struct i2c_driver wm2000_i2c_driver = {
862 .driver = {
863 .name = "wm2000",
864 .owner = THIS_MODULE,
865 },
866 .probe = wm2000_i2c_probe,
867 .remove = __devexit_p(wm2000_i2c_remove),
868 .suspend = wm2000_i2c_suspend,
869 .resume = wm2000_i2c_resume,
870 .shutdown = wm2000_i2c_shutdown,
871 .id_table = wm2000_i2c_id,
872};
873
874static int __init wm2000_init(void)
875{
876 return i2c_add_driver(&wm2000_i2c_driver);
877}
878module_init(wm2000_init);
879
880static void __exit wm2000_exit(void)
881{
882 i2c_del_driver(&wm2000_i2c_driver);
883}
884module_exit(wm2000_exit);
885
886MODULE_DESCRIPTION("ASoC WM2000 driver");
887MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
888MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 13:22:13 -0500