ASoC: wm8731: Fix wrong value references for boolean kctl
[pandora-kernel.git] / sound / soc / codecs / wm8731.c
1 /*
2  * wm8731.c  --  WM8731 ALSA SoC Audio driver
3  *
4  * Copyright 2005 Openedhand Ltd.
5  *
6  * Author: Richard Purdie <richard@openedhand.com>
7  *
8  * Based on wm8753.c by Liam Girdwood
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  */
14
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/slab.h>
22 #include <linux/platform_device.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/spi/spi.h>
25 #include <linux/of_device.h>
26 #include <sound/core.h>
27 #include <sound/pcm.h>
28 #include <sound/pcm_params.h>
29 #include <sound/soc.h>
30 #include <sound/initval.h>
31 #include <sound/tlv.h>
32
33 #include "wm8731.h"
34
35 #define WM8731_NUM_SUPPLIES 4
36 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
37         "AVDD",
38         "HPVDD",
39         "DCVDD",
40         "DBVDD",
41 };
42
43 /* codec private data */
44 struct wm8731_priv {
45         enum snd_soc_control_type control_type;
46         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
47         unsigned int sysclk;
48         int sysclk_type;
49         int playback_fs;
50         bool deemph;
51 };
52
53
54 /*
55  * wm8731 register cache
56  * We can't read the WM8731 register space when we are
57  * using 2 wire for device control, so we cache them instead.
58  * There is no point in caching the reset register
59  */
60 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
61         0x0097, 0x0097, 0x0079, 0x0079,
62         0x000a, 0x0008, 0x009f, 0x000a,
63         0x0000, 0x0000
64 };
65
66 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
67
68 static const char *wm8731_input_select[] = {"Line In", "Mic"};
69
70 static const struct soc_enum wm8731_insel_enum =
71         SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select);
72
73 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
74
75 static int wm8731_set_deemph(struct snd_soc_codec *codec)
76 {
77         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
78         int val, i, best;
79
80         /* If we're using deemphasis select the nearest available sample
81          * rate.
82          */
83         if (wm8731->deemph) {
84                 best = 1;
85                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
86                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
87                             abs(wm8731_deemph[best] - wm8731->playback_fs))
88                                 best = i;
89                 }
90
91                 val = best << 1;
92         } else {
93                 best = 0;
94                 val = 0;
95         }
96
97         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
98                 best, wm8731_deemph[best]);
99
100         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
101 }
102
103 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
104                              struct snd_ctl_elem_value *ucontrol)
105 {
106         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
107         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
108
109         ucontrol->value.integer.value[0] = wm8731->deemph;
110
111         return 0;
112 }
113
114 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
115                              struct snd_ctl_elem_value *ucontrol)
116 {
117         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
118         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
119         int deemph = ucontrol->value.integer.value[0];
120         int ret = 0;
121
122         if (deemph > 1)
123                 return -EINVAL;
124
125         mutex_lock(&codec->mutex);
126         if (wm8731->deemph != deemph) {
127                 wm8731->deemph = deemph;
128
129                 wm8731_set_deemph(codec);
130
131                 ret = 1;
132         }
133         mutex_unlock(&codec->mutex);
134
135         return ret;
136 }
137
138 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
139 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
140 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
141 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
142
143 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
144
145 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
146                  0, 127, 0, out_tlv),
147 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
148         7, 1, 0),
149
150 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
151                  in_tlv),
152 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
153
154 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
155 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
156
157 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
158                sidetone_tlv),
159
160 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
161 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
162
163 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
164                     wm8731_get_deemph, wm8731_put_deemph),
165 };
166
167 /* Output Mixer */
168 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
169 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
170 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
171 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
172 };
173
174 /* Input mux */
175 static const struct snd_kcontrol_new wm8731_input_mux_controls =
176 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
177
178 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
179 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
180 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
181 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
182         &wm8731_output_mixer_controls[0],
183         ARRAY_SIZE(wm8731_output_mixer_controls)),
184 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
185 SND_SOC_DAPM_OUTPUT("LOUT"),
186 SND_SOC_DAPM_OUTPUT("LHPOUT"),
187 SND_SOC_DAPM_OUTPUT("ROUT"),
188 SND_SOC_DAPM_OUTPUT("RHPOUT"),
189 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
190 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
191 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
192 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
193 SND_SOC_DAPM_INPUT("MICIN"),
194 SND_SOC_DAPM_INPUT("RLINEIN"),
195 SND_SOC_DAPM_INPUT("LLINEIN"),
196 };
197
198 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
199                             struct snd_soc_dapm_widget *sink)
200 {
201         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec);
202
203         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
204 }
205
206 static const struct snd_soc_dapm_route wm8731_intercon[] = {
207         {"DAC", NULL, "OSC", wm8731_check_osc},
208         {"ADC", NULL, "OSC", wm8731_check_osc},
209         {"DAC", NULL, "ACTIVE"},
210         {"ADC", NULL, "ACTIVE"},
211
212         /* output mixer */
213         {"Output Mixer", "Line Bypass Switch", "Line Input"},
214         {"Output Mixer", "HiFi Playback Switch", "DAC"},
215         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
216
217         /* outputs */
218         {"RHPOUT", NULL, "Output Mixer"},
219         {"ROUT", NULL, "Output Mixer"},
220         {"LHPOUT", NULL, "Output Mixer"},
221         {"LOUT", NULL, "Output Mixer"},
222
223         /* input mux */
224         {"Input Mux", "Line In", "Line Input"},
225         {"Input Mux", "Mic", "Mic Bias"},
226         {"ADC", NULL, "Input Mux"},
227
228         /* inputs */
229         {"Line Input", NULL, "LLINEIN"},
230         {"Line Input", NULL, "RLINEIN"},
231         {"Mic Bias", NULL, "MICIN"},
232 };
233
234 struct _coeff_div {
235         u32 mclk;
236         u32 rate;
237         u16 fs;
238         u8 sr:4;
239         u8 bosr:1;
240         u8 usb:1;
241 };
242
243 /* codec mclk clock divider coefficients */
244 static const struct _coeff_div coeff_div[] = {
245         /* 48k */
246         {12288000, 48000, 256, 0x0, 0x0, 0x0},
247         {18432000, 48000, 384, 0x0, 0x1, 0x0},
248         {12000000, 48000, 250, 0x0, 0x0, 0x1},
249
250         /* 32k */
251         {12288000, 32000, 384, 0x6, 0x0, 0x0},
252         {18432000, 32000, 576, 0x6, 0x1, 0x0},
253         {12000000, 32000, 375, 0x6, 0x0, 0x1},
254
255         /* 8k */
256         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
257         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
258         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
259         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
260         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
261
262         /* 96k */
263         {12288000, 96000, 128, 0x7, 0x0, 0x0},
264         {18432000, 96000, 192, 0x7, 0x1, 0x0},
265         {12000000, 96000, 125, 0x7, 0x0, 0x1},
266
267         /* 44.1k */
268         {11289600, 44100, 256, 0x8, 0x0, 0x0},
269         {16934400, 44100, 384, 0x8, 0x1, 0x0},
270         {12000000, 44100, 272, 0x8, 0x1, 0x1},
271
272         /* 88.2k */
273         {11289600, 88200, 128, 0xf, 0x0, 0x0},
274         {16934400, 88200, 192, 0xf, 0x1, 0x0},
275         {12000000, 88200, 136, 0xf, 0x1, 0x1},
276 };
277
278 static inline int get_coeff(int mclk, int rate)
279 {
280         int i;
281
282         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
283                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
284                         return i;
285         }
286         return 0;
287 }
288
289 static int wm8731_hw_params(struct snd_pcm_substream *substream,
290                             struct snd_pcm_hw_params *params,
291                             struct snd_soc_dai *dai)
292 {
293         struct snd_soc_codec *codec = dai->codec;
294         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
295         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
296         int i = get_coeff(wm8731->sysclk, params_rate(params));
297         u16 srate = (coeff_div[i].sr << 2) |
298                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
299
300         wm8731->playback_fs = params_rate(params);
301
302         snd_soc_write(codec, WM8731_SRATE, srate);
303
304         /* bit size */
305         switch (params_format(params)) {
306         case SNDRV_PCM_FORMAT_S16_LE:
307                 break;
308         case SNDRV_PCM_FORMAT_S20_3LE:
309                 iface |= 0x0004;
310                 break;
311         case SNDRV_PCM_FORMAT_S24_LE:
312                 iface |= 0x0008;
313                 break;
314         }
315
316         wm8731_set_deemph(codec);
317
318         snd_soc_write(codec, WM8731_IFACE, iface);
319         return 0;
320 }
321
322 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
323 {
324         struct snd_soc_codec *codec = dai->codec;
325         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
326
327         if (mute)
328                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
329         else
330                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
331         return 0;
332 }
333
334 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
335                 int clk_id, unsigned int freq, int dir)
336 {
337         struct snd_soc_codec *codec = codec_dai->codec;
338         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
339
340         switch (clk_id) {
341         case WM8731_SYSCLK_XTAL:
342         case WM8731_SYSCLK_MCLK:
343                 wm8731->sysclk_type = clk_id;
344                 break;
345         default:
346                 return -EINVAL;
347         }
348
349         switch (freq) {
350         case 11289600:
351         case 12000000:
352         case 12288000:
353         case 16934400:
354         case 18432000:
355                 wm8731->sysclk = freq;
356                 break;
357         default:
358                 return -EINVAL;
359         }
360
361         snd_soc_dapm_sync(&codec->dapm);
362
363         return 0;
364 }
365
366
367 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
368                 unsigned int fmt)
369 {
370         struct snd_soc_codec *codec = codec_dai->codec;
371         u16 iface = 0;
372
373         /* set master/slave audio interface */
374         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
375         case SND_SOC_DAIFMT_CBM_CFM:
376                 iface |= 0x0040;
377                 break;
378         case SND_SOC_DAIFMT_CBS_CFS:
379                 break;
380         default:
381                 return -EINVAL;
382         }
383
384         /* interface format */
385         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
386         case SND_SOC_DAIFMT_I2S:
387                 iface |= 0x0002;
388                 break;
389         case SND_SOC_DAIFMT_RIGHT_J:
390                 break;
391         case SND_SOC_DAIFMT_LEFT_J:
392                 iface |= 0x0001;
393                 break;
394         case SND_SOC_DAIFMT_DSP_A:
395                 iface |= 0x0013;
396                 break;
397         case SND_SOC_DAIFMT_DSP_B:
398                 iface |= 0x0003;
399                 break;
400         default:
401                 return -EINVAL;
402         }
403
404         /* clock inversion */
405         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
406         case SND_SOC_DAIFMT_NB_NF:
407                 break;
408         case SND_SOC_DAIFMT_IB_IF:
409                 iface |= 0x0090;
410                 break;
411         case SND_SOC_DAIFMT_IB_NF:
412                 iface |= 0x0080;
413                 break;
414         case SND_SOC_DAIFMT_NB_IF:
415                 iface |= 0x0010;
416                 break;
417         default:
418                 return -EINVAL;
419         }
420
421         /* set iface */
422         snd_soc_write(codec, WM8731_IFACE, iface);
423         return 0;
424 }
425
426 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
427                                  enum snd_soc_bias_level level)
428 {
429         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
430         int ret;
431         u16 reg;
432
433         switch (level) {
434         case SND_SOC_BIAS_ON:
435                 break;
436         case SND_SOC_BIAS_PREPARE:
437                 break;
438         case SND_SOC_BIAS_STANDBY:
439                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
440                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
441                                                     wm8731->supplies);
442                         if (ret != 0)
443                                 return ret;
444
445                         snd_soc_cache_sync(codec);
446                 }
447
448                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
449                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
450                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
451                 break;
452         case SND_SOC_BIAS_OFF:
453                 snd_soc_write(codec, WM8731_PWR, 0xffff);
454                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
455                                        wm8731->supplies);
456                 codec->cache_sync = 1;
457                 break;
458         }
459         codec->dapm.bias_level = level;
460         return 0;
461 }
462
463 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
464
465 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
466         SNDRV_PCM_FMTBIT_S24_LE)
467
468 static struct snd_soc_dai_ops wm8731_dai_ops = {
469         .hw_params      = wm8731_hw_params,
470         .digital_mute   = wm8731_mute,
471         .set_sysclk     = wm8731_set_dai_sysclk,
472         .set_fmt        = wm8731_set_dai_fmt,
473 };
474
475 static struct snd_soc_dai_driver wm8731_dai = {
476         .name = "wm8731-hifi",
477         .playback = {
478                 .stream_name = "Playback",
479                 .channels_min = 1,
480                 .channels_max = 2,
481                 .rates = WM8731_RATES,
482                 .formats = WM8731_FORMATS,},
483         .capture = {
484                 .stream_name = "Capture",
485                 .channels_min = 1,
486                 .channels_max = 2,
487                 .rates = WM8731_RATES,
488                 .formats = WM8731_FORMATS,},
489         .ops = &wm8731_dai_ops,
490         .symmetric_rates = 1,
491 };
492
493 #ifdef CONFIG_PM
494 static int wm8731_suspend(struct snd_soc_codec *codec, pm_message_t state)
495 {
496         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
497
498         return 0;
499 }
500
501 static int wm8731_resume(struct snd_soc_codec *codec)
502 {
503         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
504
505         return 0;
506 }
507 #else
508 #define wm8731_suspend NULL
509 #define wm8731_resume NULL
510 #endif
511
512 static int wm8731_probe(struct snd_soc_codec *codec)
513 {
514         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
515         int ret = 0, i;
516
517         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8731->control_type);
518         if (ret < 0) {
519                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
520                 return ret;
521         }
522
523         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
524                 wm8731->supplies[i].supply = wm8731_supply_names[i];
525
526         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
527                                  wm8731->supplies);
528         if (ret != 0) {
529                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
530                 return ret;
531         }
532
533         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
534                                     wm8731->supplies);
535         if (ret != 0) {
536                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
537                 goto err_regulator_get;
538         }
539
540         ret = wm8731_reset(codec);
541         if (ret < 0) {
542                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
543                 goto err_regulator_enable;
544         }
545
546         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
547
548         /* Latch the update bits */
549         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
550         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
551         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
552         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
553
554         /* Disable bypass path by default */
555         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
556
557         snd_soc_add_controls(codec, wm8731_snd_controls,
558                              ARRAY_SIZE(wm8731_snd_controls));
559
560         /* Regulators will have been enabled by bias management */
561         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
562
563         return 0;
564
565 err_regulator_enable:
566         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
567 err_regulator_get:
568         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
569
570         return ret;
571 }
572
573 /* power down chip */
574 static int wm8731_remove(struct snd_soc_codec *codec)
575 {
576         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
577
578         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
579
580         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
581         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
582
583         return 0;
584 }
585
586 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
587         .probe =        wm8731_probe,
588         .remove =       wm8731_remove,
589         .suspend =      wm8731_suspend,
590         .resume =       wm8731_resume,
591         .set_bias_level = wm8731_set_bias_level,
592         .reg_cache_size = ARRAY_SIZE(wm8731_reg),
593         .reg_word_size = sizeof(u16),
594         .reg_cache_default = wm8731_reg,
595         .dapm_widgets = wm8731_dapm_widgets,
596         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
597         .dapm_routes = wm8731_intercon,
598         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
599 };
600
601 static const struct of_device_id wm8731_of_match[] = {
602         { .compatible = "wlf,wm8731", },
603         { }
604 };
605
606 MODULE_DEVICE_TABLE(of, wm8731_of_match);
607
608 #if defined(CONFIG_SPI_MASTER)
609 static int __devinit wm8731_spi_probe(struct spi_device *spi)
610 {
611         struct wm8731_priv *wm8731;
612         int ret;
613
614         wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
615         if (wm8731 == NULL)
616                 return -ENOMEM;
617
618         wm8731->control_type = SND_SOC_SPI;
619         spi_set_drvdata(spi, wm8731);
620
621         ret = snd_soc_register_codec(&spi->dev,
622                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
623         if (ret < 0)
624                 kfree(wm8731);
625         return ret;
626 }
627
628 static int __devexit wm8731_spi_remove(struct spi_device *spi)
629 {
630         snd_soc_unregister_codec(&spi->dev);
631         kfree(spi_get_drvdata(spi));
632         return 0;
633 }
634
635 static struct spi_driver wm8731_spi_driver = {
636         .driver = {
637                 .name   = "wm8731",
638                 .owner  = THIS_MODULE,
639                 .of_match_table = wm8731_of_match,
640         },
641         .probe          = wm8731_spi_probe,
642         .remove         = __devexit_p(wm8731_spi_remove),
643 };
644 #endif /* CONFIG_SPI_MASTER */
645
646 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
647 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c,
648                                       const struct i2c_device_id *id)
649 {
650         struct wm8731_priv *wm8731;
651         int ret;
652
653         wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
654         if (wm8731 == NULL)
655                 return -ENOMEM;
656
657         i2c_set_clientdata(i2c, wm8731);
658         wm8731->control_type = SND_SOC_I2C;
659
660         ret =  snd_soc_register_codec(&i2c->dev,
661                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
662         if (ret < 0)
663                 kfree(wm8731);
664         return ret;
665 }
666
667 static __devexit int wm8731_i2c_remove(struct i2c_client *client)
668 {
669         snd_soc_unregister_codec(&client->dev);
670         kfree(i2c_get_clientdata(client));
671         return 0;
672 }
673
674 static const struct i2c_device_id wm8731_i2c_id[] = {
675         { "wm8731", 0 },
676         { }
677 };
678 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
679
680 static struct i2c_driver wm8731_i2c_driver = {
681         .driver = {
682                 .name = "wm8731",
683                 .owner = THIS_MODULE,
684                 .of_match_table = wm8731_of_match,
685         },
686         .probe =    wm8731_i2c_probe,
687         .remove =   __devexit_p(wm8731_i2c_remove),
688         .id_table = wm8731_i2c_id,
689 };
690 #endif
691
692 static int __init wm8731_modinit(void)
693 {
694         int ret = 0;
695 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
696         ret = i2c_add_driver(&wm8731_i2c_driver);
697         if (ret != 0) {
698                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
699                        ret);
700         }
701 #endif
702 #if defined(CONFIG_SPI_MASTER)
703         ret = spi_register_driver(&wm8731_spi_driver);
704         if (ret != 0) {
705                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
706                        ret);
707         }
708 #endif
709         return ret;
710 }
711 module_init(wm8731_modinit);
712
713 static void __exit wm8731_exit(void)
714 {
715 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
716         i2c_del_driver(&wm8731_i2c_driver);
717 #endif
718 #if defined(CONFIG_SPI_MASTER)
719         spi_unregister_driver(&wm8731_spi_driver);
720 #endif
721 }
722 module_exit(wm8731_exit);
723
724 MODULE_DESCRIPTION("ASoC WM8731 driver");
725 MODULE_AUTHOR("Richard Purdie");
726 MODULE_LICENSE("GPL");