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15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/init.h>
18#include <linux/delay.h>
19#include <linux/pm.h>
20#include <linux/i2c.h>
21#include <linux/platform_device.h>
22#include <linux/spi/spi.h>
23#include <sound/core.h>
24#include <sound/pcm.h>
25#include <sound/pcm_params.h>
26#include <sound/soc.h>
27#include <sound/soc-dapm.h>
28#include <sound/initval.h>
29
30#include "wm8731.h"
31
32static struct snd_soc_codec *wm8731_codec;
33struct snd_soc_codec_device soc_codec_dev_wm8731;
34
35
36struct wm8731_priv {
37 struct snd_soc_codec codec;
38 u16 reg_cache[WM8731_CACHEREGNUM];
39 unsigned int sysclk;
40};
41
42#ifdef CONFIG_SPI_MASTER
43static int wm8731_spi_write(struct spi_device *spi, const char *data, int len);
44#endif
45
46
47
48
49
50
51
52static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
53 0x0097, 0x0097, 0x0079, 0x0079,
54 0x000a, 0x0008, 0x009f, 0x000a,
55 0x0000, 0x0000
56};
57
58
59
60
61static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec,
62 unsigned int reg)
63{
64 u16 *cache = codec->reg_cache;
65 if (reg == WM8731_RESET)
66 return 0;
67 if (reg >= WM8731_CACHEREGNUM)
68 return -1;
69 return cache[reg];
70}
71
72
73
74
75static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec,
76 u16 reg, unsigned int value)
77{
78 u16 *cache = codec->reg_cache;
79 if (reg >= WM8731_CACHEREGNUM)
80 return;
81 cache[reg] = value;
82}
83
84
85
86
87static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg,
88 unsigned int value)
89{
90 u8 data[2];
91
92
93
94
95
96 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
97 data[1] = value & 0x00ff;
98
99 wm8731_write_reg_cache(codec, reg, value);
100 if (codec->hw_write(codec->control_data, data, 2) == 2)
101 return 0;
102 else
103 return -EIO;
104}
105
106#define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0)
107
108static const char *wm8731_input_select[] = {"Line In", "Mic"};
109static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
110
111static const struct soc_enum wm8731_enum[] = {
112 SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select),
113 SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph),
114};
115
116static const struct snd_kcontrol_new wm8731_snd_controls[] = {
117
118SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
119 0, 127, 0),
120SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
121 7, 1, 0),
122
123SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0),
124SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
125
126SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0),
127SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1),
128
129SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1),
130
131SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
132SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
133
134SOC_ENUM("Playback De-emphasis", wm8731_enum[1]),
135};
136
137
138static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
139SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
140SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
141SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
142};
143
144
145static const struct snd_kcontrol_new wm8731_input_mux_controls =
146SOC_DAPM_ENUM("Input Select", wm8731_enum[0]);
147
148static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
149SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
150 &wm8731_output_mixer_controls[0],
151 ARRAY_SIZE(wm8731_output_mixer_controls)),
152SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
153SND_SOC_DAPM_OUTPUT("LOUT"),
154SND_SOC_DAPM_OUTPUT("LHPOUT"),
155SND_SOC_DAPM_OUTPUT("ROUT"),
156SND_SOC_DAPM_OUTPUT("RHPOUT"),
157SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
158SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
159SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
160SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
161SND_SOC_DAPM_INPUT("MICIN"),
162SND_SOC_DAPM_INPUT("RLINEIN"),
163SND_SOC_DAPM_INPUT("LLINEIN"),
164};
165
166static const struct snd_soc_dapm_route intercon[] = {
167
168 {"Output Mixer", "Line Bypass Switch", "Line Input"},
169 {"Output Mixer", "HiFi Playback Switch", "DAC"},
170 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
171
172
173 {"RHPOUT", NULL, "Output Mixer"},
174 {"ROUT", NULL, "Output Mixer"},
175 {"LHPOUT", NULL, "Output Mixer"},
176 {"LOUT", NULL, "Output Mixer"},
177
178
179 {"Input Mux", "Line In", "Line Input"},
180 {"Input Mux", "Mic", "Mic Bias"},
181 {"ADC", NULL, "Input Mux"},
182
183
184 {"Line Input", NULL, "LLINEIN"},
185 {"Line Input", NULL, "RLINEIN"},
186 {"Mic Bias", NULL, "MICIN"},
187};
188
189static int wm8731_add_widgets(struct snd_soc_codec *codec)
190{
191 snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets,
192 ARRAY_SIZE(wm8731_dapm_widgets));
193
194 snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
195
196 snd_soc_dapm_new_widgets(codec);
197 return 0;
198}
199
200struct _coeff_div {
201 u32 mclk;
202 u32 rate;
203 u16 fs;
204 u8 sr:4;
205 u8 bosr:1;
206 u8 usb:1;
207};
208
209
210static const struct _coeff_div coeff_div[] = {
211
212 {12288000, 48000, 256, 0x0, 0x0, 0x0},
213 {18432000, 48000, 384, 0x0, 0x1, 0x0},
214 {12000000, 48000, 250, 0x0, 0x0, 0x1},
215
216
217 {12288000, 32000, 384, 0x6, 0x0, 0x0},
218 {18432000, 32000, 576, 0x6, 0x1, 0x0},
219 {12000000, 32000, 375, 0x6, 0x0, 0x1},
220
221
222 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
223 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
224 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
225 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
226 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
227
228
229 {12288000, 96000, 128, 0x7, 0x0, 0x0},
230 {18432000, 96000, 192, 0x7, 0x1, 0x0},
231 {12000000, 96000, 125, 0x7, 0x0, 0x1},
232
233
234 {11289600, 44100, 256, 0x8, 0x0, 0x0},
235 {16934400, 44100, 384, 0x8, 0x1, 0x0},
236 {12000000, 44100, 272, 0x8, 0x1, 0x1},
237
238
239 {11289600, 88200, 128, 0xf, 0x0, 0x0},
240 {16934400, 88200, 192, 0xf, 0x1, 0x0},
241 {12000000, 88200, 136, 0xf, 0x1, 0x1},
242};
243
244static inline int get_coeff(int mclk, int rate)
245{
246 int i;
247
248 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
249 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
250 return i;
251 }
252 return 0;
253}
254
255static int wm8731_hw_params(struct snd_pcm_substream *substream,
256 struct snd_pcm_hw_params *params,
257 struct snd_soc_dai *dai)
258{
259 struct snd_soc_pcm_runtime *rtd = substream->private_data;
260 struct snd_soc_device *socdev = rtd->socdev;
261 struct snd_soc_codec *codec = socdev->card->codec;
262 struct wm8731_priv *wm8731 = codec->private_data;
263 u16 iface = wm8731_read_reg_cache(codec, WM8731_IFACE) & 0xfff3;
264 int i = get_coeff(wm8731->sysclk, params_rate(params));
265 u16 srate = (coeff_div[i].sr << 2) |
266 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
267
268 wm8731_write(codec, WM8731_SRATE, srate);
269
270
271 switch (params_format(params)) {
272 case SNDRV_PCM_FORMAT_S16_LE:
273 break;
274 case SNDRV_PCM_FORMAT_S20_3LE:
275 iface |= 0x0004;
276 break;
277 case SNDRV_PCM_FORMAT_S24_LE:
278 iface |= 0x0008;
279 break;
280 }
281
282 wm8731_write(codec, WM8731_IFACE, iface);
283 return 0;
284}
285
286static int wm8731_pcm_prepare(struct snd_pcm_substream *substream,
287 struct snd_soc_dai *dai)
288{
289 struct snd_soc_pcm_runtime *rtd = substream->private_data;
290 struct snd_soc_device *socdev = rtd->socdev;
291 struct snd_soc_codec *codec = socdev->card->codec;
292
293
294 wm8731_write(codec, WM8731_ACTIVE, 0x0001);
295
296 return 0;
297}
298
299static void wm8731_shutdown(struct snd_pcm_substream *substream,
300 struct snd_soc_dai *dai)
301{
302 struct snd_soc_pcm_runtime *rtd = substream->private_data;
303 struct snd_soc_device *socdev = rtd->socdev;
304 struct snd_soc_codec *codec = socdev->card->codec;
305
306
307 if (!codec->active) {
308 udelay(50);
309 wm8731_write(codec, WM8731_ACTIVE, 0x0);
310 }
311}
312
313static int wm8731_mute(struct snd_soc_dai *dai, int mute)
314{
315 struct snd_soc_codec *codec = dai->codec;
316 u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7;
317
318 if (mute)
319 wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8);
320 else
321 wm8731_write(codec, WM8731_APDIGI, mute_reg);
322 return 0;
323}
324
325static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
326 int clk_id, unsigned int freq, int dir)
327{
328 struct snd_soc_codec *codec = codec_dai->codec;
329 struct wm8731_priv *wm8731 = codec->private_data;
330
331 switch (freq) {
332 case 11289600:
333 case 12000000:
334 case 12288000:
335 case 16934400:
336 case 18432000:
337 wm8731->sysclk = freq;
338 return 0;
339 }
340 return -EINVAL;
341}
342
343
344static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
345 unsigned int fmt)
346{
347 struct snd_soc_codec *codec = codec_dai->codec;
348 u16 iface = 0;
349
350
351 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
352 case SND_SOC_DAIFMT_CBM_CFM:
353 iface |= 0x0040;
354 break;
355 case SND_SOC_DAIFMT_CBS_CFS:
356 break;
357 default:
358 return -EINVAL;
359 }
360
361
362 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
363 case SND_SOC_DAIFMT_I2S:
364 iface |= 0x0002;
365 break;
366 case SND_SOC_DAIFMT_RIGHT_J:
367 break;
368 case SND_SOC_DAIFMT_LEFT_J:
369 iface |= 0x0001;
370 break;
371 case SND_SOC_DAIFMT_DSP_A:
372 iface |= 0x0003;
373 break;
374 case SND_SOC_DAIFMT_DSP_B:
375 iface |= 0x0013;
376 break;
377 default:
378 return -EINVAL;
379 }
380
381
382 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
383 case SND_SOC_DAIFMT_NB_NF:
384 break;
385 case SND_SOC_DAIFMT_IB_IF:
386 iface |= 0x0090;
387 break;
388 case SND_SOC_DAIFMT_IB_NF:
389 iface |= 0x0080;
390 break;
391 case SND_SOC_DAIFMT_NB_IF:
392 iface |= 0x0010;
393 break;
394 default:
395 return -EINVAL;
396 }
397
398
399 wm8731_write(codec, WM8731_IFACE, iface);
400 return 0;
401}
402
403static int wm8731_set_bias_level(struct snd_soc_codec *codec,
404 enum snd_soc_bias_level level)
405{
406 u16 reg;
407
408 switch (level) {
409 case SND_SOC_BIAS_ON:
410 break;
411 case SND_SOC_BIAS_PREPARE:
412 break;
413 case SND_SOC_BIAS_STANDBY:
414
415 reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;
416 wm8731_write(codec, WM8731_PWR, reg | 0x0040);
417 break;
418 case SND_SOC_BIAS_OFF:
419 wm8731_write(codec, WM8731_ACTIVE, 0x0);
420 wm8731_write(codec, WM8731_PWR, 0xffff);
421 break;
422 }
423 codec->bias_level = level;
424 return 0;
425}
426
427#define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
428 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
429 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
430 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
431 SNDRV_PCM_RATE_96000)
432
433#define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
434 SNDRV_PCM_FMTBIT_S24_LE)
435
436static struct snd_soc_dai_ops wm8731_dai_ops = {
437 .prepare = wm8731_pcm_prepare,
438 .hw_params = wm8731_hw_params,
439 .shutdown = wm8731_shutdown,
440 .digital_mute = wm8731_mute,
441 .set_sysclk = wm8731_set_dai_sysclk,
442 .set_fmt = wm8731_set_dai_fmt,
443};
444
445struct snd_soc_dai wm8731_dai = {
446 .name = "WM8731",
447 .playback = {
448 .stream_name = "Playback",
449 .channels_min = 1,
450 .channels_max = 2,
451 .rates = WM8731_RATES,
452 .formats = WM8731_FORMATS,},
453 .capture = {
454 .stream_name = "Capture",
455 .channels_min = 1,
456 .channels_max = 2,
457 .rates = WM8731_RATES,
458 .formats = WM8731_FORMATS,},
459 .ops = &wm8731_dai_ops,
460};
461EXPORT_SYMBOL_GPL(wm8731_dai);
462
463static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
464{
465 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
466 struct snd_soc_codec *codec = socdev->card->codec;
467
468 wm8731_write(codec, WM8731_ACTIVE, 0x0);
469 wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
470 return 0;
471}
472
473static int wm8731_resume(struct platform_device *pdev)
474{
475 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
476 struct snd_soc_codec *codec = socdev->card->codec;
477 int i;
478 u8 data[2];
479 u16 *cache = codec->reg_cache;
480
481
482 for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
483 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
484 data[1] = cache[i] & 0x00ff;
485 codec->hw_write(codec->control_data, data, 2);
486 }
487 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
488 wm8731_set_bias_level(codec, codec->suspend_bias_level);
489 return 0;
490}
491
492static int wm8731_probe(struct platform_device *pdev)
493{
494 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
495 struct snd_soc_codec *codec;
496 int ret = 0;
497
498 if (wm8731_codec == NULL) {
499 dev_err(&pdev->dev, "Codec device not registered\n");
500 return -ENODEV;
501 }
502
503 socdev->card->codec = wm8731_codec;
504 codec = wm8731_codec;
505
506
507 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
508 if (ret < 0) {
509 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
510 goto pcm_err;
511 }
512
513 snd_soc_add_controls(codec, wm8731_snd_controls,
514 ARRAY_SIZE(wm8731_snd_controls));
515 wm8731_add_widgets(codec);
516 ret = snd_soc_init_card(socdev);
517 if (ret < 0) {
518 dev_err(codec->dev, "failed to register card: %d\n", ret);
519 goto card_err;
520 }
521
522 return ret;
523
524card_err:
525 snd_soc_free_pcms(socdev);
526 snd_soc_dapm_free(socdev);
527pcm_err:
528 return ret;
529}
530
531
532static int wm8731_remove(struct platform_device *pdev)
533{
534 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
535
536 snd_soc_free_pcms(socdev);
537 snd_soc_dapm_free(socdev);
538
539 return 0;
540}
541
542struct snd_soc_codec_device soc_codec_dev_wm8731 = {
543 .probe = wm8731_probe,
544 .remove = wm8731_remove,
545 .suspend = wm8731_suspend,
546 .resume = wm8731_resume,
547};
548EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731);
549
550static int wm8731_register(struct wm8731_priv *wm8731)
551{
552 int ret;
553 struct snd_soc_codec *codec = &wm8731->codec;
554 u16 reg;
555
556 if (wm8731_codec) {
557 dev_err(codec->dev, "Another WM8731 is registered\n");
558 return -EINVAL;
559 }
560
561 mutex_init(&codec->mutex);
562 INIT_LIST_HEAD(&codec->dapm_widgets);
563 INIT_LIST_HEAD(&codec->dapm_paths);
564
565 codec->private_data = wm8731;
566 codec->name = "WM8731";
567 codec->owner = THIS_MODULE;
568 codec->read = wm8731_read_reg_cache;
569 codec->write = wm8731_write;
570 codec->bias_level = SND_SOC_BIAS_OFF;
571 codec->set_bias_level = wm8731_set_bias_level;
572 codec->dai = &wm8731_dai;
573 codec->num_dai = 1;
574 codec->reg_cache_size = WM8731_CACHEREGNUM;
575 codec->reg_cache = &wm8731->reg_cache;
576
577 memcpy(codec->reg_cache, wm8731_reg, sizeof(wm8731_reg));
578
579 ret = wm8731_reset(codec);
580 if (ret < 0) {
581 dev_err(codec->dev, "Failed to issue reset\n");
582 return ret;
583 }
584
585 wm8731_dai.dev = codec->dev;
586
587 wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
588
589
590 reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V);
591 wm8731_write(codec, WM8731_LOUT1V, reg & ~0x0100);
592 reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V);
593 wm8731_write(codec, WM8731_ROUT1V, reg & ~0x0100);
594 reg = wm8731_read_reg_cache(codec, WM8731_LINVOL);
595 wm8731_write(codec, WM8731_LINVOL, reg & ~0x0100);
596 reg = wm8731_read_reg_cache(codec, WM8731_RINVOL);
597 wm8731_write(codec, WM8731_RINVOL, reg & ~0x0100);
598
599
600 reg = wm8731_read_reg_cache(codec, WM8731_APANA);
601 wm8731_write(codec, WM8731_APANA, reg & ~0x4);
602
603 wm8731_codec = codec;
604
605 ret = snd_soc_register_codec(codec);
606 if (ret != 0) {
607 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
608 return ret;
609 }
610
611 ret = snd_soc_register_dai(&wm8731_dai);
612 if (ret != 0) {
613 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
614 snd_soc_unregister_codec(codec);
615 return ret;
616 }
617
618 return 0;
619}
620
621static void wm8731_unregister(struct wm8731_priv *wm8731)
622{
623 wm8731_set_bias_level(&wm8731->codec, SND_SOC_BIAS_OFF);
624 snd_soc_unregister_dai(&wm8731_dai);
625 snd_soc_unregister_codec(&wm8731->codec);
626 kfree(wm8731);
627 wm8731_codec = NULL;
628}
629
630#if defined(CONFIG_SPI_MASTER)
631static int wm8731_spi_write(struct spi_device *spi, const char *data, int len)
632{
633 struct spi_transfer t;
634 struct spi_message m;
635 u8 msg[2];
636
637 if (len <= 0)
638 return 0;
639
640 msg[0] = data[0];
641 msg[1] = data[1];
642
643 spi_message_init(&m);
644 memset(&t, 0, (sizeof t));
645
646 t.tx_buf = &msg[0];
647 t.len = len;
648
649 spi_message_add_tail(&t, &m);
650 spi_sync(spi, &m);
651
652 return len;
653}
654
655static int __devinit wm8731_spi_probe(struct spi_device *spi)
656{
657 struct snd_soc_codec *codec;
658 struct wm8731_priv *wm8731;
659
660 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
661 if (wm8731 == NULL)
662 return -ENOMEM;
663
664 codec = &wm8731->codec;
665 codec->control_data = spi;
666 codec->hw_write = (hw_write_t)wm8731_spi_write;
667 codec->dev = &spi->dev;
668
669 dev_set_drvdata(&spi->dev, wm8731);
670
671 return wm8731_register(wm8731);
672}
673
674static int __devexit wm8731_spi_remove(struct spi_device *spi)
675{
676 struct wm8731_priv *wm8731 = dev_get_drvdata(&spi->dev);
677
678 wm8731_unregister(wm8731);
679
680 return 0;
681}
682
683static struct spi_driver wm8731_spi_driver = {
684 .driver = {
685 .name = "wm8731",
686 .bus = &spi_bus_type,
687 .owner = THIS_MODULE,
688 },
689 .probe = wm8731_spi_probe,
690 .remove = __devexit_p(wm8731_spi_remove),
691};
692#endif
693
694#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
695static __devinit int wm8731_i2c_probe(struct i2c_client *i2c,
696 const struct i2c_device_id *id)
697{
698 struct wm8731_priv *wm8731;
699 struct snd_soc_codec *codec;
700
701 wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
702 if (wm8731 == NULL)
703 return -ENOMEM;
704
705 codec = &wm8731->codec;
706 codec->hw_write = (hw_write_t)i2c_master_send;
707
708 i2c_set_clientdata(i2c, wm8731);
709 codec->control_data = i2c;
710
711 codec->dev = &i2c->dev;
712
713 return wm8731_register(wm8731);
714}
715
716static __devexit int wm8731_i2c_remove(struct i2c_client *client)
717{
718 struct wm8731_priv *wm8731 = i2c_get_clientdata(client);
719 wm8731_unregister(wm8731);
720 return 0;
721}
722
723static const struct i2c_device_id wm8731_i2c_id[] = {
724 { "wm8731", 0 },
725 { }
726};
727MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
728
729static struct i2c_driver wm8731_i2c_driver = {
730 .driver = {
731 .name = "WM8731 I2C Codec",
732 .owner = THIS_MODULE,
733 },
734 .probe = wm8731_i2c_probe,
735 .remove = __devexit_p(wm8731_i2c_remove),
736 .id_table = wm8731_i2c_id,
737};
738#endif
739
740static int __init wm8731_modinit(void)
741{
742 int ret;
743#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
744 ret = i2c_add_driver(&wm8731_i2c_driver);
745 if (ret != 0) {
746 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
747 ret);
748 }
749#endif
750#if defined(CONFIG_SPI_MASTER)
751 ret = spi_register_driver(&wm8731_spi_driver);
752 if (ret != 0) {
753 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
754 ret);
755 }
756#endif
757 return 0;
758}
759module_init(wm8731_modinit);
760
761static void __exit wm8731_exit(void)
762{
763#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
764 i2c_del_driver(&wm8731_i2c_driver);
765#endif
766#if defined(CONFIG_SPI_MASTER)
767 spi_unregister_driver(&wm8731_spi_driver);
768#endif
769}
770module_exit(wm8731_exit);
771
772MODULE_DESCRIPTION("ASoC WM8731 driver");
773MODULE_AUTHOR("Richard Purdie");
774MODULE_LICENSE("GPL");
775
