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[net-next-2.6.git] / sound / soc / codecs / wm2000.c
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3a66d387
MB		 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>
5a0e3ad6 35#include <linux/slab.h>
3a66d387
MB		 36#include <sound/core.h>
37#include <sound/pcm.h>
38#include <sound/pcm_params.h>
39#include <sound/soc.h>
40#include <sound/soc-dapm.h>
41#include <sound/initval.h>
42#include <sound/tlv.h>
43
44#include <sound/wm2000.h>
45
46#include "wm2000.h"
47
48enum wm2000_anc_mode {
49 ANC_ACTIVE = 0,
50 ANC_BYPASS = 1,
51 ANC_STANDBY = 2,
52 ANC_OFF = 3,
53};
54
55struct wm2000_priv {
56 struct i2c_client *i2c;
57
58 enum wm2000_anc_mode anc_mode;
59
60 unsigned int anc_active:1;
61 unsigned int anc_eng_ena:1;
62 unsigned int spk_ena:1;
63
64 unsigned int mclk_div:1;
65 unsigned int speech_clarity:1;
66
67 int anc_download_size;
68 char *anc_download;
69};
70
71static struct i2c_client *wm2000_i2c;
72
73static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
74 unsigned int value)
75{
76 u8 data[3];
77 int ret;
78
79 data[0] = (reg >> 8) & 0xff;
80 data[1] = reg & 0xff;
81 data[2] = value & 0xff;
82
83 dev_vdbg(&i2c->dev, "write %x = %x\n", reg, value);
84
85 ret = i2c_master_send(i2c, data, 3);
86 if (ret == 3)
87 return 0;
88 if (ret < 0)
89 return ret;
90 else
91 return -EIO;
92}
93
94static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
95{
96 struct i2c_msg xfer[2];
97 u8 reg[2];
98 u8 data;
99 int ret;
100
101 /* Write register */
102 reg[0] = (r >> 8) & 0xff;
103 reg[1] = r & 0xff;
104 xfer[0].addr = i2c->addr;
105 xfer[0].flags = 0;
106 xfer[0].len = sizeof(reg);
107 xfer[0].buf = &reg[0];
108
109 /* Read data */
110 xfer[1].addr = i2c->addr;
111 xfer[1].flags = I2C_M_RD;
112 xfer[1].len = 1;
113 xfer[1].buf = &data;
114
115 ret = i2c_transfer(i2c->adapter, xfer, 2);
116 if (ret != 2) {
117 dev_err(&i2c->dev, "i2c_transfer() returned %d\n", ret);
118 return 0;
119 }
120
121 dev_vdbg(&i2c->dev, "read %x from %x\n", data, r);
122
123 return data;
124}
125
126static void wm2000_reset(struct wm2000_priv *wm2000)
127{
128 struct i2c_client *i2c = wm2000->i2c;
129
130 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
131 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
132 wm2000_write(i2c, WM2000_REG_ID1, 0);
133
134 wm2000->anc_mode = ANC_OFF;
135}
136
137static int wm2000_poll_bit(struct i2c_client *i2c,
138 unsigned int reg, u8 mask, int timeout)
139{
140 int val;
141
142 val = wm2000_read(i2c, reg);
143
144 while (!(val & mask) && --timeout) {
145 msleep(1);
146 val = wm2000_read(i2c, reg);
147 }
148
149 if (timeout == 0)
150 return 0;
151 else
152 return 1;
153}
154
155static int wm2000_power_up(struct i2c_client *i2c, int analogue)
156{
157 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
158 int ret, timeout;
159
160 BUG_ON(wm2000->anc_mode != ANC_OFF);
161
162 dev_dbg(&i2c->dev, "Beginning power up\n");
163
164 if (!wm2000->mclk_div) {
165 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
166 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
167 WM2000_MCLK_DIV2_ENA_CLR);
168 } else {
169 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
170 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
171 WM2000_MCLK_DIV2_ENA_SET);
172 }
173
174 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
175 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
176
177 /* Wait for ANC engine to become ready */
178 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
179 WM2000_ANC_ENG_IDLE, 1)) {
180 dev_err(&i2c->dev, "ANC engine failed to reset\n");
181 return -ETIMEDOUT;
182 }
183
184 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
185 WM2000_STATUS_BOOT_COMPLETE, 1)) {
186 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
187 return -ETIMEDOUT;
188 }
189
190 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
191
192 /* Open code download of the data since it is the only bulk
193 * write we do. */
194 dev_dbg(&i2c->dev, "Downloading %d bytes\n",
195 wm2000->anc_download_size - 2);
196
197 ret = i2c_master_send(i2c, wm2000->anc_download,
198 wm2000->anc_download_size);
199 if (ret < 0) {
200 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
201 return ret;
202 }
203 if (ret != wm2000->anc_download_size) {
204 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
205 ret, wm2000->anc_download_size);
206 return -EIO;
207 }
208
209 dev_dbg(&i2c->dev, "Download complete\n");
210
211 if (analogue) {
212 timeout = 248;
213 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);
214
215 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
216 WM2000_MODE_ANA_SEQ_INCLUDE |
217 WM2000_MODE_MOUSE_ENABLE |
218 WM2000_MODE_THERMAL_ENABLE);
219 } else {
220 timeout = 10;
221
222 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
223 WM2000_MODE_MOUSE_ENABLE |
224 WM2000_MODE_THERMAL_ENABLE);
225 }
226
227 ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
228 if (wm2000->speech_clarity)
229 ret &= ~WM2000_SPEECH_CLARITY;
230 else
231 ret |= WM2000_SPEECH_CLARITY;
232 wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
233
234 wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
235 wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
236
237 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
238
239 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
240 WM2000_STATUS_MOUSE_ACTIVE, timeout)) {
241 dev_err(&i2c->dev, "Timed out waiting for device after %dms\n",
242 timeout * 10);
243 return -ETIMEDOUT;
244 }
245
246 dev_dbg(&i2c->dev, "ANC active\n");
247 if (analogue)
248 dev_dbg(&i2c->dev, "Analogue active\n");
249 wm2000->anc_mode = ANC_ACTIVE;
250
251 return 0;
252}
253
254static int wm2000_power_down(struct i2c_client *i2c, int analogue)
255{
256 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
257 int timeout;
258
259 if (analogue) {
260 timeout = 248;
261 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);
262 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
263 WM2000_MODE_ANA_SEQ_INCLUDE |
264 WM2000_MODE_POWER_DOWN);
265 } else {
266 timeout = 10;
267 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
268 WM2000_MODE_POWER_DOWN);
269 }
270
271 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
272 WM2000_STATUS_POWER_DOWN_COMPLETE, timeout)) {
273 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
274 return -ETIMEDOUT;
275 }
276
277 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
278 WM2000_ANC_ENG_IDLE, 1)) {
279 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
280 return -ETIMEDOUT;
281 }
282
283 dev_dbg(&i2c->dev, "powered off\n");
284 wm2000->anc_mode = ANC_OFF;
285
286 return 0;
287}
288
289static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
290{
291 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
292
293 BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
294
295 if (analogue) {
296 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
297 WM2000_MODE_ANA_SEQ_INCLUDE |
298 WM2000_MODE_THERMAL_ENABLE |
299 WM2000_MODE_BYPASS_ENTRY);
300 } else {
301 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
302 WM2000_MODE_THERMAL_ENABLE |
303 WM2000_MODE_BYPASS_ENTRY);
304 }
305
306 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
307 WM2000_STATUS_ANC_DISABLED, 10)) {
308 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
309 return -ETIMEDOUT;
310 }
311
312 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
313 WM2000_ANC_ENG_IDLE, 1)) {
314 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
315 return -ETIMEDOUT;
316 }
317
318 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
319 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
320
321 wm2000->anc_mode = ANC_BYPASS;
322 dev_dbg(&i2c->dev, "bypass enabled\n");
323
324 return 0;
325}
326
327static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
328{
329 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
330
331 BUG_ON(wm2000->anc_mode != ANC_BYPASS);
332
333 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
334
335 if (analogue) {
336 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
337 WM2000_MODE_ANA_SEQ_INCLUDE |
338 WM2000_MODE_MOUSE_ENABLE |
339 WM2000_MODE_THERMAL_ENABLE);
340 } else {
341 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
342 WM2000_MODE_MOUSE_ENABLE |
343 WM2000_MODE_THERMAL_ENABLE);
344 }
345
346 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
347 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
348
349 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
350 WM2000_STATUS_MOUSE_ACTIVE, 10)) {
351 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
352 return -ETIMEDOUT;
353 }
354
355 wm2000->anc_mode = ANC_ACTIVE;
356 dev_dbg(&i2c->dev, "MOUSE active\n");
357
358 return 0;
359}
360
361static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
362{
363 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
364 int timeout;
365
366 BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
367
368 if (analogue) {
369 timeout = 248;
370 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);
371
372 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
373 WM2000_MODE_ANA_SEQ_INCLUDE |
374 WM2000_MODE_THERMAL_ENABLE |
375 WM2000_MODE_STANDBY_ENTRY);
376 } else {
377 timeout = 10;
378
379 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
380 WM2000_MODE_THERMAL_ENABLE |
381 WM2000_MODE_STANDBY_ENTRY);
382 }
383
384 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
385 WM2000_STATUS_ANC_DISABLED, timeout)) {
386 dev_err(&i2c->dev,
387 "Timed out waiting for ANC disable after 1ms\n");
388 return -ETIMEDOUT;
389 }
390
391 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE,
392 1)) {
393 dev_err(&i2c->dev,
394 "Timed out waiting for standby after %dms\n",
395 timeout * 10);
396 return -ETIMEDOUT;
397 }
398
399 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
400 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
401
402 wm2000->anc_mode = ANC_STANDBY;
403 dev_dbg(&i2c->dev, "standby\n");
404 if (analogue)
405 dev_dbg(&i2c->dev, "Analogue disabled\n");
406
407 return 0;
408}
409
410static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
411{
412 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
413 int timeout;
414
415 BUG_ON(wm2000->anc_mode != ANC_STANDBY);
416
417 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
418
419 if (analogue) {
420 timeout = 248;
421 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);
422
423 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
424 WM2000_MODE_ANA_SEQ_INCLUDE |
425 WM2000_MODE_THERMAL_ENABLE |
426 WM2000_MODE_MOUSE_ENABLE);
427 } else {
428 timeout = 10;
429
430 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
431 WM2000_MODE_THERMAL_ENABLE |
432 WM2000_MODE_MOUSE_ENABLE);
433 }
434
435 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
436 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
437
438 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
439 WM2000_STATUS_MOUSE_ACTIVE, timeout)) {
440 dev_err(&i2c->dev, "Timed out waiting for MOUSE after %dms\n",
441 timeout * 10);
442 return -ETIMEDOUT;
443 }
444
445 wm2000->anc_mode = ANC_ACTIVE;
446 dev_dbg(&i2c->dev, "MOUSE active\n");
447 if (analogue)
448 dev_dbg(&i2c->dev, "Analogue enabled\n");
449
450 return 0;
451}
452
453typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
454
455static struct {
456 enum wm2000_anc_mode source;
457 enum wm2000_anc_mode dest;
458 int analogue;
459 wm2000_mode_fn step[2];
460} anc_transitions[] = {
461 {
462 .source = ANC_OFF,
463 .dest = ANC_ACTIVE,
464 .analogue = 1,
465 .step = {
466 wm2000_power_up,
467 },
468 },
469 {
470 .source = ANC_OFF,
471 .dest = ANC_STANDBY,
472 .step = {
473 wm2000_power_up,
474 wm2000_enter_standby,
475 },
476 },
477 {
478 .source = ANC_OFF,
479 .dest = ANC_BYPASS,
480 .analogue = 1,
481 .step = {
482 wm2000_power_up,
483 wm2000_enter_bypass,
484 },
485 },
486 {
487 .source = ANC_ACTIVE,
488 .dest = ANC_BYPASS,
489 .analogue = 1,
490 .step = {
491 wm2000_enter_bypass,
492 },
493 },
494 {
495 .source = ANC_ACTIVE,
496 .dest = ANC_STANDBY,
497 .analogue = 1,
498 .step = {
499 wm2000_enter_standby,
500 },
501 },
502 {
503 .source = ANC_ACTIVE,
504 .dest = ANC_OFF,
505 .analogue = 1,
506 .step = {
507 wm2000_power_down,
508 },
509 },
510 {
511 .source = ANC_BYPASS,
512 .dest = ANC_ACTIVE,
513 .analogue = 1,
514 .step = {
515 wm2000_exit_bypass,
516 },
517 },
518 {
519 .source = ANC_BYPASS,
520 .dest = ANC_STANDBY,
521 .analogue = 1,
522 .step = {
523 wm2000_exit_bypass,
524 wm2000_enter_standby,
525 },
526 },
527 {
528 .source = ANC_BYPASS,
529 .dest = ANC_OFF,
530 .step = {
531 wm2000_exit_bypass,
532 wm2000_power_down,
533 },
534 },
535 {
536 .source = ANC_STANDBY,
537 .dest = ANC_ACTIVE,
538 .analogue = 1,
539 .step = {
540 wm2000_exit_standby,
541 },
542 },
543 {
544 .source = ANC_STANDBY,
545 .dest = ANC_BYPASS,
546 .analogue = 1,
547 .step = {
548 wm2000_exit_standby,
549 wm2000_enter_bypass,
550 },
551 },
552 {
553 .source = ANC_STANDBY,
554 .dest = ANC_OFF,
555 .step = {
556 wm2000_exit_standby,
557 wm2000_power_down,
558 },
559 },
560};
561
562static int wm2000_anc_transition(struct wm2000_priv *wm2000,
563 enum wm2000_anc_mode mode)
564{
565 struct i2c_client *i2c = wm2000->i2c;
566 int i, j;
567 int ret;
568
569 if (wm2000->anc_mode == mode)
570 return 0;
571
572 for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
573 if (anc_transitions[i].source == wm2000->anc_mode &&
574 anc_transitions[i].dest == mode)
575 break;
576 if (i == ARRAY_SIZE(anc_transitions)) {
577 dev_err(&i2c->dev, "No transition for %d->%d\n",
578 wm2000->anc_mode, mode);
579 return -EINVAL;
580 }
581
582 for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
583 if (!anc_transitions[i].step[j])
584 break;
585 ret = anc_transitions[i].step[j](i2c,
586 anc_transitions[i].analogue);
587 if (ret != 0)
588 return ret;
589 }
590
591 return 0;
592}
593
594static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
595{
596 struct i2c_client *i2c = wm2000->i2c;
597 enum wm2000_anc_mode mode;
598
599 if (wm2000->anc_eng_ena && wm2000->spk_ena)
600 if (wm2000->anc_active)
601 mode = ANC_ACTIVE;
602 else
603 mode = ANC_BYPASS;
604 else
605 mode = ANC_STANDBY;
606
607 dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
608 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
609 wm2000->anc_active);
610
611 return wm2000_anc_transition(wm2000, mode);
612}
613
614static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
615 struct snd_ctl_elem_value *ucontrol)
616{
617 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
618
619 ucontrol->value.enumerated.item[0] = wm2000->anc_active;
620
621 return 0;
622}
623
624static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
625 struct snd_ctl_elem_value *ucontrol)
626{
627 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
628 int anc_active = ucontrol->value.enumerated.item[0];
629
630 if (anc_active > 1)
631 return -EINVAL;
632
633 wm2000->anc_active = anc_active;
634
635 return wm2000_anc_set_mode(wm2000);
636}
637
638static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
639 struct snd_ctl_elem_value *ucontrol)
640{
641 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
642
643 ucontrol->value.enumerated.item[0] = wm2000->spk_ena;
644
645 return 0;
646}
647
648static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
649 struct snd_ctl_elem_value *ucontrol)
650{
651 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
652 int val = ucontrol->value.enumerated.item[0];
653
654 if (val > 1)
655 return -EINVAL;
656
657 wm2000->spk_ena = val;
658
659 return wm2000_anc_set_mode(wm2000);
660}
661
662static const struct snd_kcontrol_new wm2000_controls[] = {
663 SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
664 wm2000_anc_mode_get,
665 wm2000_anc_mode_put),
666 SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
667 wm2000_speaker_get,
668 wm2000_speaker_put),
669};
670
671static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
672 struct snd_kcontrol *kcontrol, int event)
673{
674 struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
675
676 if (SND_SOC_DAPM_EVENT_ON(event))
677 wm2000->anc_eng_ena = 1;
678
679 if (SND_SOC_DAPM_EVENT_OFF(event))
680 wm2000->anc_eng_ena = 0;
681
682 return wm2000_anc_set_mode(wm2000);
683}
684
685static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
686/* Externally visible pins */
687SND_SOC_DAPM_OUTPUT("WM2000 SPKN"),
688SND_SOC_DAPM_OUTPUT("WM2000 SPKP"),
689
690SND_SOC_DAPM_INPUT("WM2000 LINN"),
691SND_SOC_DAPM_INPUT("WM2000 LINP"),
692
693SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
694 wm2000_anc_power_event,
695 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
696};
697
698/* Target, Path, Source */
699static const struct snd_soc_dapm_route audio_map[] = {
700 { "WM2000 SPKN", NULL, "ANC Engine" },
701 { "WM2000 SPKP", NULL, "ANC Engine" },
702 { "ANC Engine", NULL, "WM2000 LINN" },
703 { "ANC Engine", NULL, "WM2000 LINP" },
704};
705
706/* Called from the machine driver */
707int wm2000_add_controls(struct snd_soc_codec *codec)
708{
709 int ret;
710
711 if (!wm2000_i2c) {
712 pr_err("WM2000 not yet probed\n");
713 return -ENODEV;
714 }
715
716 ret = snd_soc_dapm_new_controls(codec, wm2000_dapm_widgets,
717 ARRAY_SIZE(wm2000_dapm_widgets));
718 if (ret < 0)
719 return ret;
720
721 ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
722 if (ret < 0)
723 return ret;
724
725 return snd_soc_add_controls(codec, wm2000_controls,
726 ARRAY_SIZE(wm2000_controls));
727}
728EXPORT_SYMBOL_GPL(wm2000_add_controls);
729
730static int __devinit wm2000_i2c_probe(struct i2c_client *i2c,
731 const struct i2c_device_id *i2c_id)
732{
733 struct wm2000_priv *wm2000;
734 struct wm2000_platform_data *pdata;
735 const char *filename;
736 const struct firmware *fw;
737 int reg, ret;
738 u16 id;
739
740 if (wm2000_i2c) {
741 dev_err(&i2c->dev, "Another WM2000 is already registered\n");
742 return -EINVAL;
743 }
744
745 wm2000 = kzalloc(sizeof(struct wm2000_priv), GFP_KERNEL);
746 if (wm2000 == NULL) {
747 dev_err(&i2c->dev, "Unable to allocate private data\n");
748 return -ENOMEM;
749 }
750
751 /* Verify that this is a WM2000 */
752 reg = wm2000_read(i2c, WM2000_REG_ID1);
753 id = reg << 8;
754 reg = wm2000_read(i2c, WM2000_REG_ID2);
755 id |= reg & 0xff;
756
757 if (id != 0x2000) {
758 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
759 ret = -ENODEV;
760 goto err;
761 }
762
763 reg = wm2000_read(i2c, WM2000_REG_REVISON);
764 dev_info(&i2c->dev, "revision %c\n", reg + 'A');
765
766 filename = "wm2000_anc.bin";
767 pdata = dev_get_platdata(&i2c->dev);
768 if (pdata) {
769 wm2000->mclk_div = pdata->mclkdiv2;
770 wm2000->speech_clarity = !pdata->speech_enh_disable;
771
772 if (pdata->download_file)
773 filename = pdata->download_file;
774 }
775
776 ret = request_firmware(&fw, filename, &i2c->dev);
777 if (ret != 0) {
778 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
779 goto err;
780 }
781
782 /* Pre-cook the concatenation of the register address onto the image */
783 wm2000->anc_download_size = fw->size + 2;
784 wm2000->anc_download = kmalloc(wm2000->anc_download_size, GFP_KERNEL);
785 if (wm2000->anc_download == NULL) {
786 dev_err(&i2c->dev, "Out of memory\n");
787 ret = -ENOMEM;
788 goto err_fw;
789 }
790
791 wm2000->anc_download[0] = 0x80;
792 wm2000->anc_download[1] = 0x00;
793 memcpy(wm2000->anc_download + 2, fw->data, fw->size);
794
795 release_firmware(fw);
796
797 dev_set_drvdata(&i2c->dev, wm2000);
798 wm2000->anc_eng_ena = 1;
799 wm2000->i2c = i2c;
800
801 wm2000_reset(wm2000);
802
803 /* This will trigger a transition to standby mode by default */
804 wm2000_anc_set_mode(wm2000);
805
806 wm2000_i2c = i2c;
807
808 return 0;
809
810err_fw:
811 release_firmware(fw);
812err:
813 kfree(wm2000);
814 return ret;
815}
816
817static __devexit int wm2000_i2c_remove(struct i2c_client *i2c)
818{
819 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
820
821 wm2000_anc_transition(wm2000, ANC_OFF);
822
823 wm2000_i2c = NULL;
824 kfree(wm2000->anc_download);
825 kfree(wm2000);
826
827 return 0;
828}
829
830static void wm2000_i2c_shutdown(struct i2c_client *i2c)
831{
832 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
833
834 wm2000_anc_transition(wm2000, ANC_OFF);
835}
836
837#ifdef CONFIG_PM
838static int wm2000_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg)
839{
840 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
841
842 return wm2000_anc_transition(wm2000, ANC_OFF);
843}
844
845static int wm2000_i2c_resume(struct i2c_client *i2c)
846{
847 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
848
849 return wm2000_anc_set_mode(wm2000);
850}
851#else
852#define wm2000_i2c_suspend NULL
853#define wm2000_i2c_resume NULL
854#endif
855
856static const struct i2c_device_id wm2000_i2c_id[] = {
857 { "wm2000", 0 },
858 { }
859};
860MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
861
862static struct i2c_driver wm2000_i2c_driver = {
863 .driver = {
864 .name = "wm2000",
865 .owner = THIS_MODULE,
866 },
867 .probe = wm2000_i2c_probe,
868 .remove = __devexit_p(wm2000_i2c_remove),
869 .suspend = wm2000_i2c_suspend,
870 .resume = wm2000_i2c_resume,
871 .shutdown = wm2000_i2c_shutdown,
872 .id_table = wm2000_i2c_id,
873};
874
875static int __init wm2000_init(void)
876{
877 return i2c_add_driver(&wm2000_i2c_driver);
878}
879module_init(wm2000_init);
880
881static void __exit wm2000_exit(void)
882{
883 i2c_del_driver(&wm2000_i2c_driver);
884}
885module_exit(wm2000_exit);
886
887MODULE_DESCRIPTION("ASoC WM2000 driver");
888MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
889MODULE_LICENSE("GPL");
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