blob: 2cdffb0b2a80802393089d0b537b0bc2bf080362 [file] [log] [blame]
Mark Brown1dcf98f2009-07-01 18:28:54 +01001/*
2 * wm8523.c -- WM8523 ALSA SoC Audio driver
3 *
4 * Copyright 2009 Wolfson Microelectronics plc
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/init.h>
17#include <linux/delay.h>
18#include <linux/pm.h>
19#include <linux/i2c.h>
20#include <linux/platform_device.h>
21#include <linux/regulator/consumer.h>
22#include <sound/core.h>
23#include <sound/pcm.h>
24#include <sound/pcm_params.h>
25#include <sound/soc.h>
26#include <sound/soc-dapm.h>
27#include <sound/initval.h>
28#include <sound/tlv.h>
29
30#include "wm8523.h"
31
32static struct snd_soc_codec *wm8523_codec;
33struct snd_soc_codec_device soc_codec_dev_wm8523;
34
35#define WM8523_NUM_SUPPLIES 2
36static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = {
37 "AVDD",
38 "LINEVDD",
39};
40
41#define WM8523_NUM_RATES 7
42
43/* codec private data */
44struct wm8523_priv {
45 struct snd_soc_codec codec;
46 u16 reg_cache[WM8523_REGISTER_COUNT];
47 struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES];
48 unsigned int sysclk;
49 unsigned int rate_constraint_list[WM8523_NUM_RATES];
50 struct snd_pcm_hw_constraint_list rate_constraint;
51};
52
53static const u16 wm8523_reg[WM8523_REGISTER_COUNT] = {
54 0x8523, /* R0 - DEVICE_ID */
55 0x0001, /* R1 - REVISION */
56 0x0000, /* R2 - PSCTRL1 */
57 0x1812, /* R3 - AIF_CTRL1 */
58 0x0000, /* R4 - AIF_CTRL2 */
59 0x0001, /* R5 - DAC_CTRL3 */
60 0x0190, /* R6 - DAC_GAINL */
61 0x0190, /* R7 - DAC_GAINR */
62 0x0000, /* R8 - ZERO_DETECT */
63};
64
Mark Brown8d50e442009-07-10 23:12:01 +010065static int wm8523_volatile_register(unsigned int reg)
Mark Brown1dcf98f2009-07-01 18:28:54 +010066{
67 switch (reg) {
68 case WM8523_DEVICE_ID:
69 case WM8523_REVISION:
70 return 1;
71 default:
72 return 0;
73 }
74}
75
Mark Brown1dcf98f2009-07-01 18:28:54 +010076static int wm8523_reset(struct snd_soc_codec *codec)
77{
Mark Brown8d50e442009-07-10 23:12:01 +010078 return snd_soc_write(codec, WM8523_DEVICE_ID, 0);
Mark Brown1dcf98f2009-07-01 18:28:54 +010079}
80
81static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0);
82
83static const char *wm8523_zd_count_text[] = {
84 "1024",
85 "2048",
86};
87
88static const struct soc_enum wm8523_zc_count =
89 SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text);
90
91static const struct snd_kcontrol_new wm8523_snd_controls[] = {
92SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR,
93 0, 448, 0, dac_tlv),
94SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0),
95SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0),
96SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1),
97SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0),
98SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0),
99SOC_ENUM("Zero Detect Count", wm8523_zc_count),
100};
101
102static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = {
103SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
104SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
105SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
106};
107
108static const struct snd_soc_dapm_route intercon[] = {
109 { "LINEVOUTL", NULL, "DAC" },
110 { "LINEVOUTR", NULL, "DAC" },
111};
112
113static int wm8523_add_widgets(struct snd_soc_codec *codec)
114{
115 snd_soc_dapm_new_controls(codec, wm8523_dapm_widgets,
116 ARRAY_SIZE(wm8523_dapm_widgets));
117
118 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
119
Mark Brown1dcf98f2009-07-01 18:28:54 +0100120 return 0;
121}
122
123static struct {
124 int value;
125 int ratio;
126} lrclk_ratios[WM8523_NUM_RATES] = {
127 { 1, 128 },
128 { 2, 192 },
129 { 3, 256 },
130 { 4, 384 },
131 { 5, 512 },
132 { 6, 768 },
133 { 7, 1152 },
134};
135
136static int wm8523_startup(struct snd_pcm_substream *substream,
137 struct snd_soc_dai *dai)
138{
139 struct snd_soc_codec *codec = dai->codec;
Mark Brownb2c812e2010-04-14 15:35:19 +0900140 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100141
142 /* The set of sample rates that can be supported depends on the
143 * MCLK supplied to the CODEC - enforce this.
144 */
145 if (!wm8523->sysclk) {
146 dev_err(codec->dev,
147 "No MCLK configured, call set_sysclk() on init\n");
148 return -EINVAL;
149 }
150
151 return 0;
152 snd_pcm_hw_constraint_list(substream->runtime, 0,
153 SNDRV_PCM_HW_PARAM_RATE,
154 &wm8523->rate_constraint);
155
156 return 0;
157}
158
159static int wm8523_hw_params(struct snd_pcm_substream *substream,
160 struct snd_pcm_hw_params *params,
161 struct snd_soc_dai *dai)
162{
163 struct snd_soc_pcm_runtime *rtd = substream->private_data;
164 struct snd_soc_device *socdev = rtd->socdev;
165 struct snd_soc_codec *codec = socdev->card->codec;
Mark Brownb2c812e2010-04-14 15:35:19 +0900166 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100167 int i;
Mark Brown8d50e442009-07-10 23:12:01 +0100168 u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1);
169 u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100170
171 /* Find a supported LRCLK ratio */
172 for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
173 if (wm8523->sysclk / params_rate(params) ==
174 lrclk_ratios[i].ratio)
175 break;
176 }
177
178 /* Should never happen, should be handled by constraints */
179 if (i == ARRAY_SIZE(lrclk_ratios)) {
180 dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
181 wm8523->sysclk / params_rate(params));
182 return -EINVAL;
183 }
184
185 aifctrl2 &= ~WM8523_SR_MASK;
186 aifctrl2 |= lrclk_ratios[i].value;
187
188 aifctrl1 &= ~WM8523_WL_MASK;
189 switch (params_format(params)) {
190 case SNDRV_PCM_FORMAT_S16_LE:
191 break;
192 case SNDRV_PCM_FORMAT_S20_3LE:
193 aifctrl1 |= 0x8;
194 break;
195 case SNDRV_PCM_FORMAT_S24_LE:
196 aifctrl1 |= 0x10;
197 break;
198 case SNDRV_PCM_FORMAT_S32_LE:
199 aifctrl1 |= 0x18;
200 break;
201 }
202
Mark Brown8d50e442009-07-10 23:12:01 +0100203 snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1);
204 snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100205
206 return 0;
207}
208
209static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai,
210 int clk_id, unsigned int freq, int dir)
211{
212 struct snd_soc_codec *codec = codec_dai->codec;
Mark Brownb2c812e2010-04-14 15:35:19 +0900213 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100214 unsigned int val;
215 int i;
216
217 wm8523->sysclk = freq;
218
219 wm8523->rate_constraint.count = 0;
220 for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
221 val = freq / lrclk_ratios[i].ratio;
222 /* Check that it's a standard rate since core can't
223 * cope with others and having the odd rates confuses
224 * constraint matching.
225 */
226 switch (val) {
227 case 8000:
228 case 11025:
229 case 16000:
230 case 22050:
231 case 32000:
232 case 44100:
233 case 48000:
234 case 64000:
235 case 88200:
236 case 96000:
237 case 176400:
238 case 192000:
239 dev_dbg(codec->dev, "Supported sample rate: %dHz\n",
240 val);
241 wm8523->rate_constraint_list[i] = val;
242 wm8523->rate_constraint.count++;
243 break;
244 default:
245 dev_dbg(codec->dev, "Skipping sample rate: %dHz\n",
246 val);
247 }
248 }
249
250 /* Need at least one supported rate... */
251 if (wm8523->rate_constraint.count == 0)
252 return -EINVAL;
253
254 return 0;
255}
256
257
258static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai,
259 unsigned int fmt)
260{
261 struct snd_soc_codec *codec = codec_dai->codec;
Mark Brown8d50e442009-07-10 23:12:01 +0100262 u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100263
264 aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK |
265 WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK);
266
267 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
268 case SND_SOC_DAIFMT_CBM_CFM:
269 aifctrl1 |= WM8523_AIF_MSTR;
270 break;
271 case SND_SOC_DAIFMT_CBS_CFS:
272 break;
273 default:
274 return -EINVAL;
275 }
276
277 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
278 case SND_SOC_DAIFMT_I2S:
279 aifctrl1 |= 0x0002;
280 break;
281 case SND_SOC_DAIFMT_RIGHT_J:
282 break;
283 case SND_SOC_DAIFMT_LEFT_J:
284 aifctrl1 |= 0x0001;
285 break;
286 case SND_SOC_DAIFMT_DSP_A:
287 aifctrl1 |= 0x0003;
288 break;
289 case SND_SOC_DAIFMT_DSP_B:
290 aifctrl1 |= 0x0023;
291 break;
292 default:
293 return -EINVAL;
294 }
295
296 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
297 case SND_SOC_DAIFMT_NB_NF:
298 break;
299 case SND_SOC_DAIFMT_IB_IF:
300 aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV;
301 break;
302 case SND_SOC_DAIFMT_IB_NF:
303 aifctrl1 |= WM8523_BCLK_INV;
304 break;
305 case SND_SOC_DAIFMT_NB_IF:
306 aifctrl1 |= WM8523_LRCLK_INV;
307 break;
308 default:
309 return -EINVAL;
310 }
311
Mark Brown8d50e442009-07-10 23:12:01 +0100312 snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100313
314 return 0;
315}
316
317static int wm8523_set_bias_level(struct snd_soc_codec *codec,
318 enum snd_soc_bias_level level)
319{
Mark Brownb2c812e2010-04-14 15:35:19 +0900320 struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100321 int ret, i;
322
323 switch (level) {
324 case SND_SOC_BIAS_ON:
325 break;
326
327 case SND_SOC_BIAS_PREPARE:
328 /* Full power on */
329 snd_soc_update_bits(codec, WM8523_PSCTRL1,
330 WM8523_SYS_ENA_MASK, 3);
331 break;
332
333 case SND_SOC_BIAS_STANDBY:
334 if (codec->bias_level == SND_SOC_BIAS_OFF) {
335 ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
336 wm8523->supplies);
337 if (ret != 0) {
338 dev_err(codec->dev,
339 "Failed to enable supplies: %d\n",
340 ret);
341 return ret;
342 }
343
344 /* Initial power up */
345 snd_soc_update_bits(codec, WM8523_PSCTRL1,
346 WM8523_SYS_ENA_MASK, 1);
347
348 /* Sync back default/cached values */
349 for (i = WM8523_AIF_CTRL1;
350 i < WM8523_MAX_REGISTER; i++)
Mark Brown8d50e442009-07-10 23:12:01 +0100351 snd_soc_write(codec, i, wm8523->reg_cache[i]);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100352
353
354 msleep(100);
355 }
356
357 /* Power up to mute */
358 snd_soc_update_bits(codec, WM8523_PSCTRL1,
359 WM8523_SYS_ENA_MASK, 2);
360
361 break;
362
363 case SND_SOC_BIAS_OFF:
364 /* The chip runs through the power down sequence for us. */
365 snd_soc_update_bits(codec, WM8523_PSCTRL1,
366 WM8523_SYS_ENA_MASK, 0);
367 msleep(100);
368
369 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies),
370 wm8523->supplies);
371 break;
372 }
373 codec->bias_level = level;
374 return 0;
375}
376
377#define WM8523_RATES SNDRV_PCM_RATE_8000_192000
378
379#define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
380 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
381
382static struct snd_soc_dai_ops wm8523_dai_ops = {
383 .startup = wm8523_startup,
384 .hw_params = wm8523_hw_params,
385 .set_sysclk = wm8523_set_dai_sysclk,
386 .set_fmt = wm8523_set_dai_fmt,
387};
388
389struct snd_soc_dai wm8523_dai = {
390 .name = "WM8523",
391 .playback = {
392 .stream_name = "Playback",
393 .channels_min = 2, /* Mono modes not yet supported */
394 .channels_max = 2,
395 .rates = WM8523_RATES,
396 .formats = WM8523_FORMATS,
397 },
398 .ops = &wm8523_dai_ops,
399};
400EXPORT_SYMBOL_GPL(wm8523_dai);
401
402#ifdef CONFIG_PM
403static int wm8523_suspend(struct platform_device *pdev, pm_message_t state)
404{
405 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
406 struct snd_soc_codec *codec = socdev->card->codec;
407
408 wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF);
409 return 0;
410}
411
412static int wm8523_resume(struct platform_device *pdev)
413{
414 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
415 struct snd_soc_codec *codec = socdev->card->codec;
416
417 wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
418
419 return 0;
420}
421#else
422#define wm8523_suspend NULL
423#define wm8523_resume NULL
424#endif
425
426static int wm8523_probe(struct platform_device *pdev)
427{
428 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
429 struct snd_soc_codec *codec;
430 int ret = 0;
431
432 if (wm8523_codec == NULL) {
433 dev_err(&pdev->dev, "Codec device not registered\n");
434 return -ENODEV;
435 }
436
437 socdev->card->codec = wm8523_codec;
438 codec = wm8523_codec;
439
440 /* register pcms */
441 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
442 if (ret < 0) {
443 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
444 goto pcm_err;
445 }
446
447 snd_soc_add_controls(codec, wm8523_snd_controls,
448 ARRAY_SIZE(wm8523_snd_controls));
449 wm8523_add_widgets(codec);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100450
451 return ret;
452
Mark Brown1dcf98f2009-07-01 18:28:54 +0100453pcm_err:
454 return ret;
455}
456
457static int wm8523_remove(struct platform_device *pdev)
458{
459 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
460
461 snd_soc_free_pcms(socdev);
462 snd_soc_dapm_free(socdev);
463
464 return 0;
465}
466
467struct snd_soc_codec_device soc_codec_dev_wm8523 = {
468 .probe = wm8523_probe,
469 .remove = wm8523_remove,
470 .suspend = wm8523_suspend,
471 .resume = wm8523_resume,
472};
473EXPORT_SYMBOL_GPL(soc_codec_dev_wm8523);
474
Mark Brown8d50e442009-07-10 23:12:01 +0100475static int wm8523_register(struct wm8523_priv *wm8523,
476 enum snd_soc_control_type control)
Mark Brown1dcf98f2009-07-01 18:28:54 +0100477{
478 int ret;
479 struct snd_soc_codec *codec = &wm8523->codec;
480 int i;
481
482 if (wm8523_codec) {
483 dev_err(codec->dev, "Another WM8523 is registered\n");
484 return -EINVAL;
485 }
486
487 mutex_init(&codec->mutex);
488 INIT_LIST_HEAD(&codec->dapm_widgets);
489 INIT_LIST_HEAD(&codec->dapm_paths);
490
Mark Brownb2c812e2010-04-14 15:35:19 +0900491 snd_soc_codec_set_drvdata(codec, wm8523);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100492 codec->name = "WM8523";
493 codec->owner = THIS_MODULE;
Mark Brown1dcf98f2009-07-01 18:28:54 +0100494 codec->bias_level = SND_SOC_BIAS_OFF;
495 codec->set_bias_level = wm8523_set_bias_level;
496 codec->dai = &wm8523_dai;
497 codec->num_dai = 1;
498 codec->reg_cache_size = WM8523_REGISTER_COUNT;
499 codec->reg_cache = &wm8523->reg_cache;
Mark Brown8d50e442009-07-10 23:12:01 +0100500 codec->volatile_register = wm8523_volatile_register;
Mark Brown1dcf98f2009-07-01 18:28:54 +0100501
502 wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0];
503 wm8523->rate_constraint.count =
504 ARRAY_SIZE(wm8523->rate_constraint_list);
505
506 memcpy(codec->reg_cache, wm8523_reg, sizeof(wm8523_reg));
507
Mark Brown8d50e442009-07-10 23:12:01 +0100508 ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
509 if (ret != 0) {
510 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
511 goto err;
512 }
513
Mark Brown1dcf98f2009-07-01 18:28:54 +0100514 for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++)
515 wm8523->supplies[i].supply = wm8523_supply_names[i];
516
517 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies),
518 wm8523->supplies);
519 if (ret != 0) {
520 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
521 goto err;
522 }
523
524 ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
525 wm8523->supplies);
526 if (ret != 0) {
527 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
528 goto err_get;
529 }
530
Mark Brown8d50e442009-07-10 23:12:01 +0100531 ret = snd_soc_read(codec, WM8523_DEVICE_ID);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100532 if (ret < 0) {
533 dev_err(codec->dev, "Failed to read ID register\n");
534 goto err_enable;
535 }
536 if (ret != wm8523_reg[WM8523_DEVICE_ID]) {
537 dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret);
538 ret = -EINVAL;
539 goto err_enable;
540 }
541
Mark Brown8d50e442009-07-10 23:12:01 +0100542 ret = snd_soc_read(codec, WM8523_REVISION);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100543 if (ret < 0) {
544 dev_err(codec->dev, "Failed to read revision register\n");
545 goto err_enable;
546 }
547 dev_info(codec->dev, "revision %c\n",
548 (ret & WM8523_CHIP_REV_MASK) + 'A');
549
550 ret = wm8523_reset(codec);
551 if (ret < 0) {
552 dev_err(codec->dev, "Failed to issue reset\n");
553 goto err_enable;
554 }
555
556 wm8523_dai.dev = codec->dev;
557
558 /* Change some default settings - latch VU and enable ZC */
559 wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU;
560 wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC;
561
562 wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
563
564 /* Bias level configuration will have done an extra enable */
565 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
566
567 wm8523_codec = codec;
568
569 ret = snd_soc_register_codec(codec);
570 if (ret != 0) {
571 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
572 return ret;
573 }
574
575 ret = snd_soc_register_dai(&wm8523_dai);
576 if (ret != 0) {
577 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
578 snd_soc_unregister_codec(codec);
579 return ret;
580 }
581
582 return 0;
583
584err_enable:
585 regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
586err_get:
587 regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
588err:
589 kfree(wm8523);
590 return ret;
591}
592
593static void wm8523_unregister(struct wm8523_priv *wm8523)
594{
595 wm8523_set_bias_level(&wm8523->codec, SND_SOC_BIAS_OFF);
596 regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
597 snd_soc_unregister_dai(&wm8523_dai);
598 snd_soc_unregister_codec(&wm8523->codec);
599 kfree(wm8523);
600 wm8523_codec = NULL;
601}
602
603#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
604static __devinit int wm8523_i2c_probe(struct i2c_client *i2c,
605 const struct i2c_device_id *id)
606{
607 struct wm8523_priv *wm8523;
608 struct snd_soc_codec *codec;
609
610 wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL);
611 if (wm8523 == NULL)
612 return -ENOMEM;
613
614 codec = &wm8523->codec;
615 codec->hw_write = (hw_write_t)i2c_master_send;
616
617 i2c_set_clientdata(i2c, wm8523);
618 codec->control_data = i2c;
619
620 codec->dev = &i2c->dev;
621
Mark Brown8d50e442009-07-10 23:12:01 +0100622 return wm8523_register(wm8523, SND_SOC_I2C);
Mark Brown1dcf98f2009-07-01 18:28:54 +0100623}
624
625static __devexit int wm8523_i2c_remove(struct i2c_client *client)
626{
627 struct wm8523_priv *wm8523 = i2c_get_clientdata(client);
628 wm8523_unregister(wm8523);
629 return 0;
630}
631
Mark Brown1dcf98f2009-07-01 18:28:54 +0100632static const struct i2c_device_id wm8523_i2c_id[] = {
633 { "wm8523", 0 },
634 { }
635};
636MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id);
637
638static struct i2c_driver wm8523_i2c_driver = {
639 .driver = {
640 .name = "WM8523",
641 .owner = THIS_MODULE,
642 },
643 .probe = wm8523_i2c_probe,
644 .remove = __devexit_p(wm8523_i2c_remove),
Mark Brown1dcf98f2009-07-01 18:28:54 +0100645 .id_table = wm8523_i2c_id,
646};
647#endif
648
649static int __init wm8523_modinit(void)
650{
651 int ret;
652#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
653 ret = i2c_add_driver(&wm8523_i2c_driver);
654 if (ret != 0) {
655 printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n",
656 ret);
657 }
658#endif
659 return 0;
660}
661module_init(wm8523_modinit);
662
663static void __exit wm8523_exit(void)
664{
665#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
666 i2c_del_driver(&wm8523_i2c_driver);
667#endif
668}
669module_exit(wm8523_exit);
670
671MODULE_DESCRIPTION("ASoC WM8523 driver");
672MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
673MODULE_LICENSE("GPL");