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ASoC: Add support for TWL4030 audio codec
[deliverable/linux.git] / sound / soc / codecs / twl4030.c
CommitLineData
cc17557e
SS		 1/*
2 * ALSA SoC TWL4030 codec driver
3 *
4 * Author: Steve Sakoman, <steve@sakoman.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 *
20 */
21
22#include <linux/module.h>
23#include <linux/moduleparam.h>
24#include <linux/init.h>
25#include <linux/delay.h>
26#include <linux/pm.h>
27#include <linux/i2c.h>
28#include <linux/platform_device.h>
29#include <linux/i2c/twl4030.h>
30#include <sound/core.h>
31#include <sound/pcm.h>
32#include <sound/pcm_params.h>
33#include <sound/soc.h>
34#include <sound/soc-dapm.h>
35#include <sound/initval.h>
36
37#include "twl4030.h"
38
39/*
40 * twl4030 register cache & default register settings
41 */
42static const u8 twl4030_reg[TWL4030_CACHEREGNUM] = {
43 0x00, /* this register not used */
44 0x93, /* REG_CODEC_MODE (0x1) */
45 0xc3, /* REG_OPTION (0x2) */
46 0x00, /* REG_UNKNOWN (0x3) */
47 0x00, /* REG_MICBIAS_CTL (0x4) */
48 0x24, /* REG_ANAMICL (0x5) */
49 0x04, /* REG_ANAMICR (0x6) */
50 0x0a, /* REG_AVADC_CTL (0x7) */
51 0x00, /* REG_ADCMICSEL (0x8) */
52 0x00, /* REG_DIGMIXING (0x9) */
53 0x0c, /* REG_ATXL1PGA (0xA) */
54 0x0c, /* REG_ATXR1PGA (0xB) */
55 0x00, /* REG_AVTXL2PGA (0xC) */
56 0x00, /* REG_AVTXR2PGA (0xD) */
57 0x01, /* REG_AUDIO_IF (0xE) */
58 0x00, /* REG_VOICE_IF (0xF) */
59 0x00, /* REG_ARXR1PGA (0x10) */
60 0x00, /* REG_ARXL1PGA (0x11) */
61 0x6c, /* REG_ARXR2PGA (0x12) */
62 0x6c, /* REG_ARXL2PGA (0x13) */
63 0x00, /* REG_VRXPGA (0x14) */
64 0x00, /* REG_VSTPGA (0x15) */
65 0x00, /* REG_VRX2ARXPGA (0x16) */
66 0x0c, /* REG_AVDAC_CTL (0x17) */
67 0x00, /* REG_ARX2VTXPGA (0x18) */
68 0x00, /* REG_ARXL1_APGA_CTL (0x19) */
69 0x00, /* REG_ARXR1_APGA_CTL (0x1A) */
70 0x4b, /* REG_ARXL2_APGA_CTL (0x1B) */
71 0x4b, /* REG_ARXR2_APGA_CTL (0x1C) */
72 0x00, /* REG_ATX2ARXPGA (0x1D) */
73 0x00, /* REG_BT_IF (0x1E) */
74 0x00, /* REG_BTPGA (0x1F) */
75 0x00, /* REG_BTSTPGA (0x20) */
76 0x00, /* REG_EAR_CTL (0x21) */
77 0x24, /* REG_HS_SEL (0x22) */
78 0x0a, /* REG_HS_GAIN_SET (0x23) */
79 0x00, /* REG_HS_POPN_SET (0x24) */
80 0x00, /* REG_PREDL_CTL (0x25) */
81 0x00, /* REG_PREDR_CTL (0x26) */
82 0x00, /* REG_PRECKL_CTL (0x27) */
83 0x00, /* REG_PRECKR_CTL (0x28) */
84 0x00, /* REG_HFL_CTL (0x29) */
85 0x00, /* REG_HFR_CTL (0x2A) */
86 0x00, /* REG_ALC_CTL (0x2B) */
87 0x00, /* REG_ALC_SET1 (0x2C) */
88 0x00, /* REG_ALC_SET2 (0x2D) */
89 0x00, /* REG_BOOST_CTL (0x2E) */
90 0x01, /* REG_SOFTVOL_CTL (0x2F) */
91 0x00, /* REG_DTMF_FREQSEL (0x30) */
92 0x00, /* REG_DTMF_TONEXT1H (0x31) */
93 0x00, /* REG_DTMF_TONEXT1L (0x32) */
94 0x00, /* REG_DTMF_TONEXT2H (0x33) */
95 0x00, /* REG_DTMF_TONEXT2L (0x34) */
96 0x00, /* REG_DTMF_TONOFF (0x35) */
97 0x00, /* REG_DTMF_WANONOFF (0x36) */
98 0x00, /* REG_I2S_RX_SCRAMBLE_H (0x37) */
99 0x00, /* REG_I2S_RX_SCRAMBLE_M (0x38) */
100 0x00, /* REG_I2S_RX_SCRAMBLE_L (0x39) */
101 0x16, /* REG_APLL_CTL (0x3A) */
102 0x00, /* REG_DTMF_CTL (0x3B) */
103 0x00, /* REG_DTMF_PGA_CTL2 (0x3C) */
104 0x00, /* REG_DTMF_PGA_CTL1 (0x3D) */
105 0x00, /* REG_MISC_SET_1 (0x3E) */
106 0x00, /* REG_PCMBTMUX (0x3F) */
107 0x00, /* not used (0x40) */
108 0x00, /* not used (0x41) */
109 0x00, /* not used (0x42) */
110 0x00, /* REG_RX_PATH_SEL (0x43) */
111 0x00, /* REG_VDL_APGA_CTL (0x44) */
112 0x00, /* REG_VIBRA_CTL (0x45) */
113 0x00, /* REG_VIBRA_SET (0x46) */
114 0x00, /* REG_VIBRA_PWM_SET (0x47) */
115 0x00, /* REG_ANAMIC_GAIN (0x48) */
116 0x00, /* REG_MISC_SET_2 (0x49) */
117};
118
119/*
120 * read twl4030 register cache
121 */
122static inline unsigned int twl4030_read_reg_cache(struct snd_soc_codec *codec,
123 unsigned int reg)
124{
125 u8 *cache = codec->reg_cache;
126
127 return cache[reg];
128}
129
130/*
131 * write twl4030 register cache
132 */
133static inline void twl4030_write_reg_cache(struct snd_soc_codec *codec,
134 u8 reg, u8 value)
135{
136 u8 *cache = codec->reg_cache;
137
138 if (reg >= TWL4030_CACHEREGNUM)
139 return;
140 cache[reg] = value;
141}
142
143/*
144 * write to the twl4030 register space
145 */
146static int twl4030_write(struct snd_soc_codec *codec,
147 unsigned int reg, unsigned int value)
148{
149 twl4030_write_reg_cache(codec, reg, value);
150 return twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);
151}
152
153static void twl4030_clear_codecpdz(struct snd_soc_codec *codec)
154{
155 u8 mode;
156
157 mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
158 twl4030_write(codec, TWL4030_REG_CODEC_MODE,
159 mode & ~TWL4030_CODECPDZ);
160
161 /* REVISIT: this delay is present in TI sample drivers */
162 /* but there seems to be no TRM requirement for it */
163 udelay(10);
164}
165
166static void twl4030_set_codecpdz(struct snd_soc_codec *codec)
167{
168 u8 mode;
169
170 mode = twl4030_read_reg_cache(codec, TWL4030_REG_CODEC_MODE);
171 twl4030_write(codec, TWL4030_REG_CODEC_MODE,
172 mode | TWL4030_CODECPDZ);
173
174 /* REVISIT: this delay is present in TI sample drivers */
175 /* but there seems to be no TRM requirement for it */
176 udelay(10);
177}
178
179static void twl4030_init_chip(struct snd_soc_codec *codec)
180{
181 int i;
182
183 /* clear CODECPDZ prior to setting register defaults */
184 twl4030_clear_codecpdz(codec);
185
186 /* set all audio section registers to reasonable defaults */
187 for (i = TWL4030_REG_OPTION; i <= TWL4030_REG_MISC_SET_2; i++)
188 twl4030_write(codec, i, twl4030_reg[i]);
189
190}
191
192static const struct snd_kcontrol_new twl4030_snd_controls[] = {
193 SOC_DOUBLE_R("Master Playback Volume",
194 TWL4030_REG_ARXL2PGA, TWL4030_REG_ARXR2PGA,
195 0, 127, 0),
196 SOC_DOUBLE_R("Capture Volume",
197 TWL4030_REG_ATXL1PGA, TWL4030_REG_ATXR1PGA,
198 0, 127, 0),
199};
200
201/* add non dapm controls */
202static int twl4030_add_controls(struct snd_soc_codec *codec)
203{
204 int err, i;
205
206 for (i = 0; i < ARRAY_SIZE(twl4030_snd_controls); i++) {
207 err = snd_ctl_add(codec->card,
208 snd_soc_cnew(&twl4030_snd_controls[i],
209 codec, NULL));
210 if (err < 0)
211 return err;
212 }
213
214 return 0;
215}
216
217static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = {
218 SND_SOC_DAPM_INPUT("INL"),
219 SND_SOC_DAPM_INPUT("INR"),
220
221 SND_SOC_DAPM_OUTPUT("OUTL"),
222 SND_SOC_DAPM_OUTPUT("OUTR"),
223
224 SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
225 SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
226
227 SND_SOC_DAPM_ADC("ADCL", "Left Capture", SND_SOC_NOPM, 0, 0),
228 SND_SOC_DAPM_ADC("ADCR", "Right Capture", SND_SOC_NOPM, 0, 0),
229};
230
231static const struct snd_soc_dapm_route intercon[] = {
232 /* outputs */
233 {"OUTL", NULL, "DACL"},
234 {"OUTR", NULL, "DACR"},
235
236 /* inputs */
237 {"ADCL", NULL, "INL"},
238 {"ADCR", NULL, "INR"},
239};
240
241static int twl4030_add_widgets(struct snd_soc_codec *codec)
242{
243 snd_soc_dapm_new_controls(codec, twl4030_dapm_widgets,
244 ARRAY_SIZE(twl4030_dapm_widgets));
245
246 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
247
248 snd_soc_dapm_new_widgets(codec);
249 return 0;
250}
251
252static void twl4030_power_up(struct snd_soc_codec *codec)
253{
254 u8 anamicl, regmisc1, byte, popn, hsgain;
255 int i = 0;
256
257 /* set CODECPDZ to turn on codec */
258 twl4030_set_codecpdz(codec);
259
260 /* initiate offset cancellation */
261 anamicl = twl4030_read_reg_cache(codec, TWL4030_REG_ANAMICL);
262 twl4030_write(codec, TWL4030_REG_ANAMICL,
263 anamicl | TWL4030_CNCL_OFFSET_START);
264
265 /* wait for offset cancellation to complete */
266 do {
267 /* this takes a little while, so don't slam i2c */
268 udelay(2000);
269 twl4030_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &byte,
270 TWL4030_REG_ANAMICL);
271 } while ((i++ < 100) &&
272 ((byte & TWL4030_CNCL_OFFSET_START) ==
273 TWL4030_CNCL_OFFSET_START));
274
275 /* anti-pop when changing analog gain */
276 regmisc1 = twl4030_read_reg_cache(codec, TWL4030_REG_MISC_SET_1);
277 twl4030_write(codec, TWL4030_REG_MISC_SET_1,
278 regmisc1 | TWL4030_SMOOTH_ANAVOL_EN);
279
280 /* toggle CODECPDZ as per TRM */
281 twl4030_clear_codecpdz(codec);
282 twl4030_set_codecpdz(codec);
283
284 /* program anti-pop with bias ramp delay */
285 popn = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
286 popn &= TWL4030_RAMP_DELAY;
287 popn |= TWL4030_RAMP_DELAY_645MS;
288 twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
289 popn |= TWL4030_VMID_EN;
290 twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
291
292 /* enable output stage and gain setting */
293 hsgain = TWL4030_HSR_GAIN_0DB | TWL4030_HSL_GAIN_0DB;
294 twl4030_write(codec, TWL4030_REG_HS_GAIN_SET, hsgain);
295
296 /* enable anti-pop ramp */
297 popn |= TWL4030_RAMP_EN;
298 twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
299}
300
301static void twl4030_power_down(struct snd_soc_codec *codec)
302{
303 u8 popn, hsgain;
304
305 /* disable anti-pop ramp */
306 popn = twl4030_read_reg_cache(codec, TWL4030_REG_HS_POPN_SET);
307 popn &= ~TWL4030_RAMP_EN;
308 twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
309
310 /* disable output stage and gain setting */
311 hsgain = TWL4030_HSR_GAIN_PWR_DOWN | TWL4030_HSL_GAIN_PWR_DOWN;
312 twl4030_write(codec, TWL4030_REG_HS_GAIN_SET, hsgain);
313
314 /* disable bias out */
315 popn &= ~TWL4030_VMID_EN;
316 twl4030_write(codec, TWL4030_REG_HS_POPN_SET, popn);
317
318 /* power down */
319 twl4030_clear_codecpdz(codec);
320}
321
322static int twl4030_set_bias_level(struct snd_soc_codec *codec,
323 enum snd_soc_bias_level level)
324{
325 switch (level) {
326 case SND_SOC_BIAS_ON:
327 twl4030_power_up(codec);
328 break;
329 case SND_SOC_BIAS_PREPARE:
330 /* TODO: develop a twl4030_prepare function */
331 break;
332 case SND_SOC_BIAS_STANDBY:
333 /* TODO: develop a twl4030_standby function */
334 twl4030_power_down(codec);
335 break;
336 case SND_SOC_BIAS_OFF:
337 twl4030_power_down(codec);
338 break;
339 }
340 codec->bias_level = level;
341
342 return 0;
343}
344
345static int twl4030_hw_params(struct snd_pcm_substream *substream,
346 struct snd_pcm_hw_params *params)
347{
348 struct snd_soc_pcm_runtime *rtd = substream->private_data;
349 struct snd_soc_device *socdev = rtd->socdev;
350 struct snd_soc_codec *codec = socdev->codec;
351 u8 mode, old_mode, format, old_format;
352
353
354 /* bit rate */
355 old_mode = twl4030_read_reg_cache(codec,
356 TWL4030_REG_CODEC_MODE) & ~TWL4030_CODECPDZ;
357 mode = old_mode & ~TWL4030_APLL_RATE;
358
359 switch (params_rate(params)) {
360 case 8000:
361 mode |= TWL4030_APLL_RATE_8000;
362 break;
363 case 11025:
364 mode |= TWL4030_APLL_RATE_11025;
365 break;
366 case 12000:
367 mode |= TWL4030_APLL_RATE_12000;
368 break;
369 case 16000:
370 mode |= TWL4030_APLL_RATE_16000;
371 break;
372 case 22050:
373 mode |= TWL4030_APLL_RATE_22050;
374 break;
375 case 24000:
376 mode |= TWL4030_APLL_RATE_24000;
377 break;
378 case 32000:
379 mode |= TWL4030_APLL_RATE_32000;
380 break;
381 case 44100:
382 mode |= TWL4030_APLL_RATE_44100;
383 break;
384 case 48000:
385 mode |= TWL4030_APLL_RATE_48000;
386 break;
387 default:
388 printk(KERN_ERR "TWL4030 hw params: unknown rate %d\n",
389 params_rate(params));
390 return -EINVAL;
391 }
392
393 if (mode != old_mode) {
394 /* change rate and set CODECPDZ */
395 twl4030_write(codec, TWL4030_REG_CODEC_MODE, mode);
396 twl4030_set_codecpdz(codec);
397 }
398
399 /* sample size */
400 old_format = twl4030_read_reg_cache(codec, TWL4030_REG_AUDIO_IF);
401 format = old_format;
402 format &= ~TWL4030_DATA_WIDTH;
403 switch (params_format(params)) {
404 case SNDRV_PCM_FORMAT_S16_LE:
405 format |= TWL4030_DATA_WIDTH_16S_16W;
406 break;
407 case SNDRV_PCM_FORMAT_S24_LE:
408 format |= TWL4030_DATA_WIDTH_32S_24W;
409 break;
410 default:
411 printk(KERN_ERR "TWL4030 hw params: unknown format %d\n",
412 params_format(params));
413 return -EINVAL;
414 }
415
416 if (format != old_format) {
417
418 /* clear CODECPDZ before changing format (codec requirement) */
419 twl4030_clear_codecpdz(codec);
420
421 /* change format */
422 twl4030_write(codec, TWL4030_REG_AUDIO_IF, format);
423
424 /* set CODECPDZ afterwards */
425 twl4030_set_codecpdz(codec);
426 }
427 return 0;
428}
429
430static int twl4030_set_dai_sysclk(struct snd_soc_dai *codec_dai,
431 int clk_id, unsigned int freq, int dir)
432{
433 struct snd_soc_codec *codec = codec_dai->codec;
434 u8 infreq;
435
436 switch (freq) {
437 case 19200000:
438 infreq = TWL4030_APLL_INFREQ_19200KHZ;
439 break;
440 case 26000000:
441 infreq = TWL4030_APLL_INFREQ_26000KHZ;
442 break;
443 case 38400000:
444 infreq = TWL4030_APLL_INFREQ_38400KHZ;
445 break;
446 default:
447 printk(KERN_ERR "TWL4030 set sysclk: unknown rate %d\n",
448 freq);
449 return -EINVAL;
450 }
451
452 infreq |= TWL4030_APLL_EN;
453 twl4030_write(codec, TWL4030_REG_APLL_CTL, infreq);
454
455 return 0;
456}
457
458static int twl4030_set_dai_fmt(struct snd_soc_dai *codec_dai,
459 unsigned int fmt)
460{
461 struct snd_soc_codec *codec = codec_dai->codec;
462 u8 old_format, format;
463
464 /* get format */
465 old_format = twl4030_read_reg_cache(codec, TWL4030_REG_AUDIO_IF);
466 format = old_format;
467
468 /* set master/slave audio interface */
469 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
470 case SND_SOC_DAIFMT_CBM_CFM:
471 format &= ~(TWL4030_AIF_SLAVE_EN);
472 format |= TWL4030_CLK256FS_EN;
473 break;
474 case SND_SOC_DAIFMT_CBS_CFS:
475 format &= ~(TWL4030_CLK256FS_EN);
476 format |= TWL4030_AIF_SLAVE_EN;
477 break;
478 default:
479 return -EINVAL;
480 }
481
482 /* interface format */
483 format &= ~TWL4030_AIF_FORMAT;
484 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
485 case SND_SOC_DAIFMT_I2S:
486 format |= TWL4030_AIF_FORMAT_CODEC;
487 break;
488 default:
489 return -EINVAL;
490 }
491
492 if (format != old_format) {
493
494 /* clear CODECPDZ before changing format (codec requirement) */
495 twl4030_clear_codecpdz(codec);
496
497 /* change format */
498 twl4030_write(codec, TWL4030_REG_AUDIO_IF, format);
499
500 /* set CODECPDZ afterwards */
501 twl4030_set_codecpdz(codec);
502 }
503
504 return 0;
505}
506
507#define TWL4030_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
508#define TWL4030_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FORMAT_S24_LE)
509
510struct snd_soc_dai twl4030_dai = {
511 .name = "twl4030",
512 .playback = {
513 .stream_name = "Playback",
514 .channels_min = 2,
515 .channels_max = 2,
516 .rates = TWL4030_RATES,
517 .formats = TWL4030_FORMATS,},
518 .capture = {
519 .stream_name = "Capture",
520 .channels_min = 2,
521 .channels_max = 2,
522 .rates = TWL4030_RATES,
523 .formats = TWL4030_FORMATS,},
524 .ops = {
525 .hw_params = twl4030_hw_params,
526 },
527 .dai_ops = {
528 .set_sysclk = twl4030_set_dai_sysclk,
529 .set_fmt = twl4030_set_dai_fmt,
530 }
531};
532EXPORT_SYMBOL_GPL(twl4030_dai);
533
534static int twl4030_suspend(struct platform_device *pdev, pm_message_t state)
535{
536 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
537 struct snd_soc_codec *codec = socdev->codec;
538
539 twl4030_set_bias_level(codec, SND_SOC_BIAS_OFF);
540
541 return 0;
542}
543
544static int twl4030_resume(struct platform_device *pdev)
545{
546 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
547 struct snd_soc_codec *codec = socdev->codec;
548
549 twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
550 twl4030_set_bias_level(codec, codec->suspend_bias_level);
551 return 0;
552}
553
554/*
555 * initialize the driver
556 * register the mixer and dsp interfaces with the kernel
557 */
558
559static int twl4030_init(struct snd_soc_device *socdev)
560{
561 struct snd_soc_codec *codec = socdev->codec;
562 int ret = 0;
563
564 printk(KERN_INFO "TWL4030 Audio Codec init \n");
565
566 codec->name = "twl4030";
567 codec->owner = THIS_MODULE;
568 codec->read = twl4030_read_reg_cache;
569 codec->write = twl4030_write;
570 codec->set_bias_level = twl4030_set_bias_level;
571 codec->dai = &twl4030_dai;
572 codec->num_dai = 1;
573 codec->reg_cache_size = sizeof(twl4030_reg);
574 codec->reg_cache = kmemdup(twl4030_reg, sizeof(twl4030_reg),
575 GFP_KERNEL);
576 if (codec->reg_cache == NULL)
577 return -ENOMEM;
578
579 /* register pcms */
580 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
581 if (ret < 0) {
582 printk(KERN_ERR "twl4030: failed to create pcms\n");
583 goto pcm_err;
584 }
585
586 twl4030_init_chip(codec);
587
588 /* power on device */
589 twl4030_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
590
591 twl4030_add_controls(codec);
592 twl4030_add_widgets(codec);
593
594 ret = snd_soc_register_card(socdev);
595 if (ret < 0) {
596 printk(KERN_ERR "twl4030: failed to register card\n");
597 goto card_err;
598 }
599
600 return ret;
601
602card_err:
603 snd_soc_free_pcms(socdev);
604 snd_soc_dapm_free(socdev);
605pcm_err:
606 kfree(codec->reg_cache);
607 return ret;
608}
609
610static struct snd_soc_device *twl4030_socdev;
611
612static int twl4030_probe(struct platform_device *pdev)
613{
614 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
615 struct snd_soc_codec *codec;
616
617 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
618 if (codec == NULL)
619 return -ENOMEM;
620
621 socdev->codec = codec;
622 mutex_init(&codec->mutex);
623 INIT_LIST_HEAD(&codec->dapm_widgets);
624 INIT_LIST_HEAD(&codec->dapm_paths);
625
626 twl4030_socdev = socdev;
627 twl4030_init(socdev);
628
629 return 0;
630}
631
632static int twl4030_remove(struct platform_device *pdev)
633{
634 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
635 struct snd_soc_codec *codec = socdev->codec;
636
637 printk(KERN_INFO "TWL4030 Audio Codec remove\n");
638 kfree(codec);
639
640 return 0;
641}
642
643struct snd_soc_codec_device soc_codec_dev_twl4030 = {
644 .probe = twl4030_probe,
645 .remove = twl4030_remove,
646 .suspend = twl4030_suspend,
647 .resume = twl4030_resume,
648};
649EXPORT_SYMBOL_GPL(soc_codec_dev_twl4030);
650
651MODULE_DESCRIPTION("ASoC TWL4030 codec driver");
652MODULE_AUTHOR("Steve Sakoman");
653MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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