Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/sound/soc/codecs/wm8731.c

  1 /*
  2  * wm8731.c  --  WM8731 ALSA SoC Audio driver
  3  *
  4  * Copyright 2005 Openedhand Ltd.
  5  * Copyright 2006-12 Wolfson Microelectronics, plc
  6  *
  7  * Author: Richard Purdie <richard@openedhand.com>
  8  *
  9  * Based on wm8753.c by Liam Girdwood
 10  *
 11  * This program is free software; you can redistribute it and/or modify
 12  * it under the terms of the GNU General Public License version 2 as
 13  * published by the Free Software Foundation.
 14  */
 15 
 16 #include <linux/module.h>
 17 #include <linux/moduleparam.h>
 18 #include <linux/init.h>
 19 #include <linux/delay.h>
 20 #include <linux/pm.h>
 21 #include <linux/i2c.h>
 22 #include <linux/slab.h>
 23 #include <linux/regmap.h>
 24 #include <linux/regulator/consumer.h>
 25 #include <linux/spi/spi.h>
 26 #include <linux/of_device.h>
 27 #include <linux/mutex.h>
 28 #include <linux/clk.h>
 29 #include <sound/core.h>
 30 #include <sound/pcm.h>
 31 #include <sound/pcm_params.h>
 32 #include <sound/soc.h>
 33 #include <sound/initval.h>
 34 #include <sound/tlv.h>
 35 
 36 #include "wm8731.h"
 37 
 38 #define WM8731_NUM_SUPPLIES 4
 39 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
 40         "AVDD",
 41         "HPVDD",
 42         "DCVDD",
 43         "DBVDD",
 44 };
 45 
 46 /* codec private data */
 47 struct wm8731_priv {
 48         struct regmap *regmap;
 49         struct clk *mclk;
 50         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
 51         const struct snd_pcm_hw_constraint_list *constraints;
 52         unsigned int sysclk;
 53         int sysclk_type;
 54         int playback_fs;
 55         bool deemph;
 56 
 57         struct mutex lock;
 58 };
 59 
 60 
 61 /*
 62  * wm8731 register cache
 63  */
 64 static const struct reg_default wm8731_reg_defaults[] = {
 65         { 0, 0x0097 },
 66         { 1, 0x0097 },
 67         { 2, 0x0079 },
 68         { 3, 0x0079 },
 69         { 4, 0x000a },
 70         { 5, 0x0008 },
 71         { 6, 0x009f },
 72         { 7, 0x000a },
 73         { 8, 0x0000 },
 74         { 9, 0x0000 },
 75 };
 76 
 77 static bool wm8731_volatile(struct device *dev, unsigned int reg)
 78 {
 79         return reg == WM8731_RESET;
 80 }
 81 
 82 static bool wm8731_writeable(struct device *dev, unsigned int reg)
 83 {
 84         return reg <= WM8731_RESET;
 85 }
 86 
 87 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
 88 
 89 static const char *wm8731_input_select[] = {"Line In", "Mic"};
 90 
 91 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum,
 92                             WM8731_APANA, 2, wm8731_input_select);
 93 
 94 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
 95 
 96 static int wm8731_set_deemph(struct snd_soc_codec *codec)
 97 {
 98         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 99         int val, i, best;
100 
101         /* If we're using deemphasis select the nearest available sample
102          * rate.
103          */
104         if (wm8731->deemph) {
105                 best = 1;
106                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
107                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
108                             abs(wm8731_deemph[best] - wm8731->playback_fs))
109                                 best = i;
110                 }
111 
112                 val = best << 1;
113         } else {
114                 best = 0;
115                 val = 0;
116         }
117 
118         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
119                 best, wm8731_deemph[best]);
120 
121         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
122 }
123 
124 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
125                              struct snd_ctl_elem_value *ucontrol)
126 {
127         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
128         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
129 
130         ucontrol->value.integer.value[0] = wm8731->deemph;
131 
132         return 0;
133 }
134 
135 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
136                              struct snd_ctl_elem_value *ucontrol)
137 {
138         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
139         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
140         int deemph = ucontrol->value.integer.value[0];
141         int ret = 0;
142 
143         if (deemph > 1)
144                 return -EINVAL;
145 
146         mutex_lock(&wm8731->lock);
147         if (wm8731->deemph != deemph) {
148                 wm8731->deemph = deemph;
149 
150                 wm8731_set_deemph(codec);
151 
152                 ret = 1;
153         }
154         mutex_unlock(&wm8731->lock);
155 
156         return ret;
157 }
158 
159 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
160 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
161 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
162 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
163 
164 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
165 
166 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
167                  0, 127, 0, out_tlv),
168 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
169         7, 1, 0),
170 
171 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
172                  in_tlv),
173 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
174 
175 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
176 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
177 
178 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
179                sidetone_tlv),
180 
181 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
182 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
183 
184 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
185                     wm8731_get_deemph, wm8731_put_deemph),
186 };
187 
188 /* Output Mixer */
189 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
190 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
191 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
192 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
193 };
194 
195 /* Input mux */
196 static const struct snd_kcontrol_new wm8731_input_mux_controls =
197 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
198 
199 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
200 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
201 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
202 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
203         &wm8731_output_mixer_controls[0],
204         ARRAY_SIZE(wm8731_output_mixer_controls)),
205 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
206 SND_SOC_DAPM_OUTPUT("LOUT"),
207 SND_SOC_DAPM_OUTPUT("LHPOUT"),
208 SND_SOC_DAPM_OUTPUT("ROUT"),
209 SND_SOC_DAPM_OUTPUT("RHPOUT"),
210 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
211 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
212 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
213 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
214 SND_SOC_DAPM_INPUT("MICIN"),
215 SND_SOC_DAPM_INPUT("RLINEIN"),
216 SND_SOC_DAPM_INPUT("LLINEIN"),
217 };
218 
219 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
220                             struct snd_soc_dapm_widget *sink)
221 {
222         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm);
223         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
224 
225         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
226 }
227 
228 static const struct snd_soc_dapm_route wm8731_intercon[] = {
229         {"DAC", NULL, "OSC", wm8731_check_osc},
230         {"ADC", NULL, "OSC", wm8731_check_osc},
231         {"DAC", NULL, "ACTIVE"},
232         {"ADC", NULL, "ACTIVE"},
233 
234         /* output mixer */
235         {"Output Mixer", "Line Bypass Switch", "Line Input"},
236         {"Output Mixer", "HiFi Playback Switch", "DAC"},
237         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
238 
239         /* outputs */
240         {"RHPOUT", NULL, "Output Mixer"},
241         {"ROUT", NULL, "Output Mixer"},
242         {"LHPOUT", NULL, "Output Mixer"},
243         {"LOUT", NULL, "Output Mixer"},
244 
245         /* input mux */
246         {"Input Mux", "Line In", "Line Input"},
247         {"Input Mux", "Mic", "Mic Bias"},
248         {"ADC", NULL, "Input Mux"},
249 
250         /* inputs */
251         {"Line Input", NULL, "LLINEIN"},
252         {"Line Input", NULL, "RLINEIN"},
253         {"Mic Bias", NULL, "MICIN"},
254 };
255 
256 struct _coeff_div {
257         u32 mclk;
258         u32 rate;
259         u16 fs;
260         u8 sr:4;
261         u8 bosr:1;
262         u8 usb:1;
263 };
264 
265 /* codec mclk clock divider coefficients */
266 static const struct _coeff_div coeff_div[] = {
267         /* 48k */
268         {12288000, 48000, 256, 0x0, 0x0, 0x0},
269         {18432000, 48000, 384, 0x0, 0x1, 0x0},
270         {12000000, 48000, 250, 0x0, 0x0, 0x1},
271 
272         /* 32k */
273         {12288000, 32000, 384, 0x6, 0x0, 0x0},
274         {18432000, 32000, 576, 0x6, 0x1, 0x0},
275         {12000000, 32000, 375, 0x6, 0x0, 0x1},
276 
277         /* 8k */
278         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
279         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
280         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
281         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
282         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
283 
284         /* 96k */
285         {12288000, 96000, 128, 0x7, 0x0, 0x0},
286         {18432000, 96000, 192, 0x7, 0x1, 0x0},
287         {12000000, 96000, 125, 0x7, 0x0, 0x1},
288 
289         /* 44.1k */
290         {11289600, 44100, 256, 0x8, 0x0, 0x0},
291         {16934400, 44100, 384, 0x8, 0x1, 0x0},
292         {12000000, 44100, 272, 0x8, 0x1, 0x1},
293 
294         /* 88.2k */
295         {11289600, 88200, 128, 0xf, 0x0, 0x0},
296         {16934400, 88200, 192, 0xf, 0x1, 0x0},
297         {12000000, 88200, 136, 0xf, 0x1, 0x1},
298 };
299 
300 /* rates constraints */
301 static const unsigned int wm8731_rates_12000000[] = {
302         8000, 32000, 44100, 48000, 96000, 88200,
303 };
304 
305 static const unsigned int wm8731_rates_12288000_18432000[] = {
306         8000, 32000, 48000, 96000,
307 };
308 
309 static const unsigned int wm8731_rates_11289600_16934400[] = {
310         8000, 44100, 88200,
311 };
312 
313 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
314         .list = wm8731_rates_12000000,
315         .count = ARRAY_SIZE(wm8731_rates_12000000),
316 };
317 
318 static const
319 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
320         .list = wm8731_rates_12288000_18432000,
321         .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
322 };
323 
324 static const
325 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
326         .list = wm8731_rates_11289600_16934400,
327         .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
328 };
329 
330 static inline int get_coeff(int mclk, int rate)
331 {
332         int i;
333 
334         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
335                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
336                         return i;
337         }
338         return 0;
339 }
340 
341 static int wm8731_hw_params(struct snd_pcm_substream *substream,
342                             struct snd_pcm_hw_params *params,
343                             struct snd_soc_dai *dai)
344 {
345         struct snd_soc_codec *codec = dai->codec;
346         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
347         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
348         int i = get_coeff(wm8731->sysclk, params_rate(params));
349         u16 srate = (coeff_div[i].sr << 2) |
350                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
351 
352         wm8731->playback_fs = params_rate(params);
353 
354         snd_soc_write(codec, WM8731_SRATE, srate);
355 
356         /* bit size */
357         switch (params_width(params)) {
358         case 16:
359                 break;
360         case 20:
361                 iface |= 0x0004;
362                 break;
363         case 24:
364                 iface |= 0x0008;
365                 break;
366         }
367 
368         wm8731_set_deemph(codec);
369 
370         snd_soc_write(codec, WM8731_IFACE, iface);
371         return 0;
372 }
373 
374 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
375 {
376         struct snd_soc_codec *codec = dai->codec;
377         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
378 
379         if (mute)
380                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
381         else
382                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
383         return 0;
384 }
385 
386 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
387                 int clk_id, unsigned int freq, int dir)
388 {
389         struct snd_soc_codec *codec = codec_dai->codec;
390         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
391 
392         switch (clk_id) {
393         case WM8731_SYSCLK_XTAL:
394         case WM8731_SYSCLK_MCLK:
395                 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
396                         return -EINVAL;
397                 wm8731->sysclk_type = clk_id;
398                 break;
399         default:
400                 return -EINVAL;
401         }
402 
403         switch (freq) {
404         case 0:
405                 wm8731->constraints = NULL;
406                 break;
407         case 12000000:
408                 wm8731->constraints = &wm8731_constraints_12000000;
409                 break;
410         case 12288000:
411         case 18432000:
412                 wm8731->constraints = &wm8731_constraints_12288000_18432000;
413                 break;
414         case 16934400:
415         case 11289600:
416                 wm8731->constraints = &wm8731_constraints_11289600_16934400;
417                 break;
418         default:
419                 return -EINVAL;
420         }
421 
422         wm8731->sysclk = freq;
423 
424         snd_soc_dapm_sync(&codec->dapm);
425 
426         return 0;
427 }
428 
429 
430 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
431                 unsigned int fmt)
432 {
433         struct snd_soc_codec *codec = codec_dai->codec;
434         u16 iface = 0;
435 
436         /* set master/slave audio interface */
437         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
438         case SND_SOC_DAIFMT_CBM_CFM:
439                 iface |= 0x0040;
440                 break;
441         case SND_SOC_DAIFMT_CBS_CFS:
442                 break;
443         default:
444                 return -EINVAL;
445         }
446 
447         /* interface format */
448         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
449         case SND_SOC_DAIFMT_I2S:
450                 iface |= 0x0002;
451                 break;
452         case SND_SOC_DAIFMT_RIGHT_J:
453                 break;
454         case SND_SOC_DAIFMT_LEFT_J:
455                 iface |= 0x0001;
456                 break;
457         case SND_SOC_DAIFMT_DSP_A:
458                 iface |= 0x0013;
459                 break;
460         case SND_SOC_DAIFMT_DSP_B:
461                 iface |= 0x0003;
462                 break;
463         default:
464                 return -EINVAL;
465         }
466 
467         /* clock inversion */
468         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
469         case SND_SOC_DAIFMT_NB_NF:
470                 break;
471         case SND_SOC_DAIFMT_IB_IF:
472                 iface |= 0x0090;
473                 break;
474         case SND_SOC_DAIFMT_IB_NF:
475                 iface |= 0x0080;
476                 break;
477         case SND_SOC_DAIFMT_NB_IF:
478                 iface |= 0x0010;
479                 break;
480         default:
481                 return -EINVAL;
482         }
483 
484         /* set iface */
485         snd_soc_write(codec, WM8731_IFACE, iface);
486         return 0;
487 }
488 
489 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
490                                  enum snd_soc_bias_level level)
491 {
492         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
493         int ret;
494         u16 reg;
495 
496         switch (level) {
497         case SND_SOC_BIAS_ON:
498                 if (wm8731->mclk)
499                         clk_prepare_enable(wm8731->mclk);
500                 break;
501         case SND_SOC_BIAS_PREPARE:
502                 break;
503         case SND_SOC_BIAS_STANDBY:
504                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
505                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
506                                                     wm8731->supplies);
507                         if (ret != 0)
508                                 return ret;
509 
510                         regcache_sync(wm8731->regmap);
511                 }
512 
513                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
514                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
515                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
516                 break;
517         case SND_SOC_BIAS_OFF:
518                 if (wm8731->mclk)
519                         clk_disable_unprepare(wm8731->mclk);
520                 snd_soc_write(codec, WM8731_PWR, 0xffff);
521                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
522                                        wm8731->supplies);
523                 regcache_mark_dirty(wm8731->regmap);
524                 break;
525         }
526         codec->dapm.bias_level = level;
527         return 0;
528 }
529 
530 static int wm8731_startup(struct snd_pcm_substream *substream,
531         struct snd_soc_dai *dai)
532 {
533         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
534 
535         if (wm8731->constraints)
536                 snd_pcm_hw_constraint_list(substream->runtime, 0,
537                                            SNDRV_PCM_HW_PARAM_RATE,
538                                            wm8731->constraints);
539 
540         return 0;
541 }
542 
543 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
544 
545 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
546         SNDRV_PCM_FMTBIT_S24_LE)
547 
548 static const struct snd_soc_dai_ops wm8731_dai_ops = {
549         .startup        = wm8731_startup,
550         .hw_params      = wm8731_hw_params,
551         .digital_mute   = wm8731_mute,
552         .set_sysclk     = wm8731_set_dai_sysclk,
553         .set_fmt        = wm8731_set_dai_fmt,
554 };
555 
556 static struct snd_soc_dai_driver wm8731_dai = {
557         .name = "wm8731-hifi",
558         .playback = {
559                 .stream_name = "Playback",
560                 .channels_min = 1,
561                 .channels_max = 2,
562                 .rates = WM8731_RATES,
563                 .formats = WM8731_FORMATS,},
564         .capture = {
565                 .stream_name = "Capture",
566                 .channels_min = 1,
567                 .channels_max = 2,
568                 .rates = WM8731_RATES,
569                 .formats = WM8731_FORMATS,},
570         .ops = &wm8731_dai_ops,
571         .symmetric_rates = 1,
572 };
573 
574 static int wm8731_probe(struct snd_soc_codec *codec)
575 {
576         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
577         int ret = 0, i;
578 
579         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
580                 wm8731->supplies[i].supply = wm8731_supply_names[i];
581 
582         ret = devm_regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
583                                  wm8731->supplies);
584         if (ret != 0) {
585                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
586                 return ret;
587         }
588 
589         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
590                                     wm8731->supplies);
591         if (ret != 0) {
592                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
593                 return ret;
594         }
595 
596         ret = wm8731_reset(codec);
597         if (ret < 0) {
598                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
599                 goto err_regulator_enable;
600         }
601 
602         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
603 
604         /* Latch the update bits */
605         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
606         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
607         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
608         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
609 
610         /* Disable bypass path by default */
611         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
612 
613         /* Regulators will have been enabled by bias management */
614         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
615 
616         return 0;
617 
618 err_regulator_enable:
619         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
620 
621         return ret;
622 }
623 
624 /* power down chip */
625 static int wm8731_remove(struct snd_soc_codec *codec)
626 {
627         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
628 
629         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
630 
631         return 0;
632 }
633 
634 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
635         .probe =        wm8731_probe,
636         .remove =       wm8731_remove,
637         .set_bias_level = wm8731_set_bias_level,
638         .suspend_bias_off = true,
639 
640         .dapm_widgets = wm8731_dapm_widgets,
641         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
642         .dapm_routes = wm8731_intercon,
643         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
644         .controls =     wm8731_snd_controls,
645         .num_controls = ARRAY_SIZE(wm8731_snd_controls),
646 };
647 
648 static const struct of_device_id wm8731_of_match[] = {
649         { .compatible = "wlf,wm8731", },
650         { }
651 };
652 
653 MODULE_DEVICE_TABLE(of, wm8731_of_match);
654 
655 static const struct regmap_config wm8731_regmap = {
656         .reg_bits = 7,
657         .val_bits = 9,
658 
659         .max_register = WM8731_RESET,
660         .volatile_reg = wm8731_volatile,
661         .writeable_reg = wm8731_writeable,
662 
663         .cache_type = REGCACHE_RBTREE,
664         .reg_defaults = wm8731_reg_defaults,
665         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
666 };
667 
668 #if defined(CONFIG_SPI_MASTER)
669 static int wm8731_spi_probe(struct spi_device *spi)
670 {
671         struct wm8731_priv *wm8731;
672         int ret;
673 
674         wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
675         if (wm8731 == NULL)
676                 return -ENOMEM;
677 
678         wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
679         if (IS_ERR(wm8731->mclk)) {
680                 ret = PTR_ERR(wm8731->mclk);
681                 if (ret == -ENOENT) {
682                         wm8731->mclk = NULL;
683                         dev_warn(&spi->dev, "Assuming static MCLK\n");
684                 } else {
685                         dev_err(&spi->dev, "Failed to get MCLK: %d\n",
686                                 ret);
687                         return ret;
688                 }
689         }
690 
691         mutex_init(&wm8731->lock);
692 
693         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
694         if (IS_ERR(wm8731->regmap)) {
695                 ret = PTR_ERR(wm8731->regmap);
696                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
697                         ret);
698                 return ret;
699         }
700 
701         spi_set_drvdata(spi, wm8731);
702 
703         ret = snd_soc_register_codec(&spi->dev,
704                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
705         if (ret != 0) {
706                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
707                 return ret;
708         }
709 
710         return 0;
711 }
712 
713 static int wm8731_spi_remove(struct spi_device *spi)
714 {
715         snd_soc_unregister_codec(&spi->dev);
716         return 0;
717 }
718 
719 static struct spi_driver wm8731_spi_driver = {
720         .driver = {
721                 .name   = "wm8731",
722                 .owner  = THIS_MODULE,
723                 .of_match_table = wm8731_of_match,
724         },
725         .probe          = wm8731_spi_probe,
726         .remove         = wm8731_spi_remove,
727 };
728 #endif /* CONFIG_SPI_MASTER */
729 
730 #if IS_ENABLED(CONFIG_I2C)
731 static int wm8731_i2c_probe(struct i2c_client *i2c,
732                             const struct i2c_device_id *id)
733 {
734         struct wm8731_priv *wm8731;
735         int ret;
736 
737         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
738                               GFP_KERNEL);
739         if (wm8731 == NULL)
740                 return -ENOMEM;
741 
742         wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
743         if (IS_ERR(wm8731->mclk)) {
744                 ret = PTR_ERR(wm8731->mclk);
745                 if (ret == -ENOENT) {
746                         wm8731->mclk = NULL;
747                         dev_warn(&i2c->dev, "Assuming static MCLK\n");
748                 } else {
749                         dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
750                                 ret);
751                         return ret;
752                 }
753         }
754 
755         mutex_init(&wm8731->lock);
756 
757         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
758         if (IS_ERR(wm8731->regmap)) {
759                 ret = PTR_ERR(wm8731->regmap);
760                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
761                         ret);
762                 return ret;
763         }
764 
765         i2c_set_clientdata(i2c, wm8731);
766 
767         ret = snd_soc_register_codec(&i2c->dev,
768                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
769         if (ret != 0) {
770                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
771                 return ret;
772         }
773 
774         return 0;
775 }
776 
777 static int wm8731_i2c_remove(struct i2c_client *client)
778 {
779         snd_soc_unregister_codec(&client->dev);
780         return 0;
781 }
782 
783 static const struct i2c_device_id wm8731_i2c_id[] = {
784         { "wm8731", 0 },
785         { }
786 };
787 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
788 
789 static struct i2c_driver wm8731_i2c_driver = {
790         .driver = {
791                 .name = "wm8731",
792                 .owner = THIS_MODULE,
793                 .of_match_table = wm8731_of_match,
794         },
795         .probe =    wm8731_i2c_probe,
796         .remove =   wm8731_i2c_remove,
797         .id_table = wm8731_i2c_id,
798 };
799 #endif
800 
801 static int __init wm8731_modinit(void)
802 {
803         int ret = 0;
804 #if IS_ENABLED(CONFIG_I2C)
805         ret = i2c_add_driver(&wm8731_i2c_driver);
806         if (ret != 0) {
807                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
808                        ret);
809         }
810 #endif
811 #if defined(CONFIG_SPI_MASTER)
812         ret = spi_register_driver(&wm8731_spi_driver);
813         if (ret != 0) {
814                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
815                        ret);
816         }
817 #endif
818         return ret;
819 }
820 module_init(wm8731_modinit);
821 
822 static void __exit wm8731_exit(void)
823 {
824 #if IS_ENABLED(CONFIG_I2C)
825         i2c_del_driver(&wm8731_i2c_driver);
826 #endif
827 #if defined(CONFIG_SPI_MASTER)
828         spi_unregister_driver(&wm8731_spi_driver);
829 #endif
830 }
831 module_exit(wm8731_exit);
832 
833 MODULE_DESCRIPTION("ASoC WM8731 driver");
834 MODULE_AUTHOR("Richard Purdie");
835 MODULE_LICENSE("GPL");
836 

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