Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

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 <sound/core.h>
 28 #include <sound/pcm.h>
 29 #include <sound/pcm_params.h>
 30 #include <sound/soc.h>
 31 #include <sound/initval.h>
 32 #include <sound/tlv.h>
 33 
 34 #include "wm8731.h"
 35 
 36 #define WM8731_NUM_SUPPLIES 4
 37 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
 38         "AVDD",
 39         "HPVDD",
 40         "DCVDD",
 41         "DBVDD",
 42 };
 43 
 44 /* codec private data */
 45 struct wm8731_priv {
 46         struct regmap *regmap;
 47         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
 48         const struct snd_pcm_hw_constraint_list *constraints;
 49         unsigned int sysclk;
 50         int sysclk_type;
 51         int playback_fs;
 52         bool deemph;
 53 };
 54 
 55 
 56 /*
 57  * wm8731 register cache
 58  */
 59 static const struct reg_default wm8731_reg_defaults[] = {
 60         { 0, 0x0097 },
 61         { 1, 0x0097 },
 62         { 2, 0x0079 },
 63         { 3, 0x0079 },
 64         { 4, 0x000a },
 65         { 5, 0x0008 },
 66         { 6, 0x009f },
 67         { 7, 0x000a },
 68         { 8, 0x0000 },
 69         { 9, 0x0000 },
 70 };
 71 
 72 static bool wm8731_volatile(struct device *dev, unsigned int reg)
 73 {
 74         return reg == WM8731_RESET;
 75 }
 76 
 77 static bool wm8731_writeable(struct device *dev, unsigned int reg)
 78 {
 79         return reg <= WM8731_RESET;
 80 }
 81 
 82 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
 83 
 84 static const char *wm8731_input_select[] = {"Line In", "Mic"};
 85 
 86 static const struct soc_enum wm8731_insel_enum =
 87         SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select);
 88 
 89 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
 90 
 91 static int wm8731_set_deemph(struct snd_soc_codec *codec)
 92 {
 93         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 94         int val, i, best;
 95 
 96         /* If we're using deemphasis select the nearest available sample
 97          * rate.
 98          */
 99         if (wm8731->deemph) {
100                 best = 1;
101                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
102                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
103                             abs(wm8731_deemph[best] - wm8731->playback_fs))
104                                 best = i;
105                 }
106 
107                 val = best << 1;
108         } else {
109                 best = 0;
110                 val = 0;
111         }
112 
113         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
114                 best, wm8731_deemph[best]);
115 
116         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
117 }
118 
119 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
120                              struct snd_ctl_elem_value *ucontrol)
121 {
122         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
123         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
124 
125         ucontrol->value.enumerated.item[0] = wm8731->deemph;
126 
127         return 0;
128 }
129 
130 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
131                              struct snd_ctl_elem_value *ucontrol)
132 {
133         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
134         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
135         int deemph = ucontrol->value.enumerated.item[0];
136         int ret = 0;
137 
138         if (deemph > 1)
139                 return -EINVAL;
140 
141         mutex_lock(&codec->mutex);
142         if (wm8731->deemph != deemph) {
143                 wm8731->deemph = deemph;
144 
145                 wm8731_set_deemph(codec);
146 
147                 ret = 1;
148         }
149         mutex_unlock(&codec->mutex);
150 
151         return ret;
152 }
153 
154 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
155 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
156 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
157 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
158 
159 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
160 
161 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
162                  0, 127, 0, out_tlv),
163 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
164         7, 1, 0),
165 
166 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
167                  in_tlv),
168 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
169 
170 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
171 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
172 
173 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
174                sidetone_tlv),
175 
176 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
177 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
178 
179 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
180                     wm8731_get_deemph, wm8731_put_deemph),
181 };
182 
183 /* Output Mixer */
184 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
185 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
186 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
187 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
188 };
189 
190 /* Input mux */
191 static const struct snd_kcontrol_new wm8731_input_mux_controls =
192 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
193 
194 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
195 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
196 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
197 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
198         &wm8731_output_mixer_controls[0],
199         ARRAY_SIZE(wm8731_output_mixer_controls)),
200 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
201 SND_SOC_DAPM_OUTPUT("LOUT"),
202 SND_SOC_DAPM_OUTPUT("LHPOUT"),
203 SND_SOC_DAPM_OUTPUT("ROUT"),
204 SND_SOC_DAPM_OUTPUT("RHPOUT"),
205 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
206 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
207 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
208 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
209 SND_SOC_DAPM_INPUT("MICIN"),
210 SND_SOC_DAPM_INPUT("RLINEIN"),
211 SND_SOC_DAPM_INPUT("LLINEIN"),
212 };
213 
214 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
215                             struct snd_soc_dapm_widget *sink)
216 {
217         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec);
218 
219         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
220 }
221 
222 static const struct snd_soc_dapm_route wm8731_intercon[] = {
223         {"DAC", NULL, "OSC", wm8731_check_osc},
224         {"ADC", NULL, "OSC", wm8731_check_osc},
225         {"DAC", NULL, "ACTIVE"},
226         {"ADC", NULL, "ACTIVE"},
227 
228         /* output mixer */
229         {"Output Mixer", "Line Bypass Switch", "Line Input"},
230         {"Output Mixer", "HiFi Playback Switch", "DAC"},
231         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
232 
233         /* outputs */
234         {"RHPOUT", NULL, "Output Mixer"},
235         {"ROUT", NULL, "Output Mixer"},
236         {"LHPOUT", NULL, "Output Mixer"},
237         {"LOUT", NULL, "Output Mixer"},
238 
239         /* input mux */
240         {"Input Mux", "Line In", "Line Input"},
241         {"Input Mux", "Mic", "Mic Bias"},
242         {"ADC", NULL, "Input Mux"},
243 
244         /* inputs */
245         {"Line Input", NULL, "LLINEIN"},
246         {"Line Input", NULL, "RLINEIN"},
247         {"Mic Bias", NULL, "MICIN"},
248 };
249 
250 struct _coeff_div {
251         u32 mclk;
252         u32 rate;
253         u16 fs;
254         u8 sr:4;
255         u8 bosr:1;
256         u8 usb:1;
257 };
258 
259 /* codec mclk clock divider coefficients */
260 static const struct _coeff_div coeff_div[] = {
261         /* 48k */
262         {12288000, 48000, 256, 0x0, 0x0, 0x0},
263         {18432000, 48000, 384, 0x0, 0x1, 0x0},
264         {12000000, 48000, 250, 0x0, 0x0, 0x1},
265 
266         /* 32k */
267         {12288000, 32000, 384, 0x6, 0x0, 0x0},
268         {18432000, 32000, 576, 0x6, 0x1, 0x0},
269         {12000000, 32000, 375, 0x6, 0x0, 0x1},
270 
271         /* 8k */
272         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
273         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
274         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
275         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
276         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
277 
278         /* 96k */
279         {12288000, 96000, 128, 0x7, 0x0, 0x0},
280         {18432000, 96000, 192, 0x7, 0x1, 0x0},
281         {12000000, 96000, 125, 0x7, 0x0, 0x1},
282 
283         /* 44.1k */
284         {11289600, 44100, 256, 0x8, 0x0, 0x0},
285         {16934400, 44100, 384, 0x8, 0x1, 0x0},
286         {12000000, 44100, 272, 0x8, 0x1, 0x1},
287 
288         /* 88.2k */
289         {11289600, 88200, 128, 0xf, 0x0, 0x0},
290         {16934400, 88200, 192, 0xf, 0x1, 0x0},
291         {12000000, 88200, 136, 0xf, 0x1, 0x1},
292 };
293 
294 /* rates constraints */
295 static const unsigned int wm8731_rates_12000000[] = {
296         8000, 32000, 44100, 48000, 96000, 88200,
297 };
298 
299 static const unsigned int wm8731_rates_12288000_18432000[] = {
300         8000, 32000, 48000, 96000,
301 };
302 
303 static const unsigned int wm8731_rates_11289600_16934400[] = {
304         8000, 44100, 88200,
305 };
306 
307 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
308         .list = wm8731_rates_12000000,
309         .count = ARRAY_SIZE(wm8731_rates_12000000),
310 };
311 
312 static const
313 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
314         .list = wm8731_rates_12288000_18432000,
315         .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
316 };
317 
318 static const
319 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
320         .list = wm8731_rates_11289600_16934400,
321         .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
322 };
323 
324 static inline int get_coeff(int mclk, int rate)
325 {
326         int i;
327 
328         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
329                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
330                         return i;
331         }
332         return 0;
333 }
334 
335 static int wm8731_hw_params(struct snd_pcm_substream *substream,
336                             struct snd_pcm_hw_params *params,
337                             struct snd_soc_dai *dai)
338 {
339         struct snd_soc_codec *codec = dai->codec;
340         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
341         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
342         int i = get_coeff(wm8731->sysclk, params_rate(params));
343         u16 srate = (coeff_div[i].sr << 2) |
344                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
345 
346         wm8731->playback_fs = params_rate(params);
347 
348         snd_soc_write(codec, WM8731_SRATE, srate);
349 
350         /* bit size */
351         switch (params_format(params)) {
352         case SNDRV_PCM_FORMAT_S16_LE:
353                 break;
354         case SNDRV_PCM_FORMAT_S20_3LE:
355                 iface |= 0x0004;
356                 break;
357         case SNDRV_PCM_FORMAT_S24_LE:
358                 iface |= 0x0008;
359                 break;
360         }
361 
362         wm8731_set_deemph(codec);
363 
364         snd_soc_write(codec, WM8731_IFACE, iface);
365         return 0;
366 }
367 
368 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
369 {
370         struct snd_soc_codec *codec = dai->codec;
371         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
372 
373         if (mute)
374                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
375         else
376                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
377         return 0;
378 }
379 
380 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
381                 int clk_id, unsigned int freq, int dir)
382 {
383         struct snd_soc_codec *codec = codec_dai->codec;
384         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
385 
386         switch (clk_id) {
387         case WM8731_SYSCLK_XTAL:
388         case WM8731_SYSCLK_MCLK:
389                 wm8731->sysclk_type = clk_id;
390                 break;
391         default:
392                 return -EINVAL;
393         }
394 
395         switch (freq) {
396         case 0:
397                 wm8731->constraints = NULL;
398                 break;
399         case 12000000:
400                 wm8731->constraints = &wm8731_constraints_12000000;
401                 break;
402         case 12288000:
403         case 18432000:
404                 wm8731->constraints = &wm8731_constraints_12288000_18432000;
405                 break;
406         case 16934400:
407         case 11289600:
408                 wm8731->constraints = &wm8731_constraints_11289600_16934400;
409                 break;
410         default:
411                 return -EINVAL;
412         }
413 
414         wm8731->sysclk = freq;
415 
416         snd_soc_dapm_sync(&codec->dapm);
417 
418         return 0;
419 }
420 
421 
422 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
423                 unsigned int fmt)
424 {
425         struct snd_soc_codec *codec = codec_dai->codec;
426         u16 iface = 0;
427 
428         /* set master/slave audio interface */
429         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
430         case SND_SOC_DAIFMT_CBM_CFM:
431                 iface |= 0x0040;
432                 break;
433         case SND_SOC_DAIFMT_CBS_CFS:
434                 break;
435         default:
436                 return -EINVAL;
437         }
438 
439         /* interface format */
440         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
441         case SND_SOC_DAIFMT_I2S:
442                 iface |= 0x0002;
443                 break;
444         case SND_SOC_DAIFMT_RIGHT_J:
445                 break;
446         case SND_SOC_DAIFMT_LEFT_J:
447                 iface |= 0x0001;
448                 break;
449         case SND_SOC_DAIFMT_DSP_A:
450                 iface |= 0x0013;
451                 break;
452         case SND_SOC_DAIFMT_DSP_B:
453                 iface |= 0x0003;
454                 break;
455         default:
456                 return -EINVAL;
457         }
458 
459         /* clock inversion */
460         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
461         case SND_SOC_DAIFMT_NB_NF:
462                 break;
463         case SND_SOC_DAIFMT_IB_IF:
464                 iface |= 0x0090;
465                 break;
466         case SND_SOC_DAIFMT_IB_NF:
467                 iface |= 0x0080;
468                 break;
469         case SND_SOC_DAIFMT_NB_IF:
470                 iface |= 0x0010;
471                 break;
472         default:
473                 return -EINVAL;
474         }
475 
476         /* set iface */
477         snd_soc_write(codec, WM8731_IFACE, iface);
478         return 0;
479 }
480 
481 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
482                                  enum snd_soc_bias_level level)
483 {
484         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
485         int ret;
486         u16 reg;
487 
488         switch (level) {
489         case SND_SOC_BIAS_ON:
490                 break;
491         case SND_SOC_BIAS_PREPARE:
492                 break;
493         case SND_SOC_BIAS_STANDBY:
494                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
495                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
496                                                     wm8731->supplies);
497                         if (ret != 0)
498                                 return ret;
499 
500                         regcache_sync(wm8731->regmap);
501                 }
502 
503                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
504                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
505                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
506                 break;
507         case SND_SOC_BIAS_OFF:
508                 snd_soc_write(codec, WM8731_PWR, 0xffff);
509                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
510                                        wm8731->supplies);
511                 regcache_mark_dirty(wm8731->regmap);
512                 break;
513         }
514         codec->dapm.bias_level = level;
515         return 0;
516 }
517 
518 static int wm8731_startup(struct snd_pcm_substream *substream,
519         struct snd_soc_dai *dai)
520 {
521         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
522 
523         if (wm8731->constraints)
524                 snd_pcm_hw_constraint_list(substream->runtime, 0,
525                                            SNDRV_PCM_HW_PARAM_RATE,
526                                            wm8731->constraints);
527 
528         return 0;
529 }
530 
531 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
532 
533 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
534         SNDRV_PCM_FMTBIT_S24_LE)
535 
536 static const struct snd_soc_dai_ops wm8731_dai_ops = {
537         .startup        = wm8731_startup,
538         .hw_params      = wm8731_hw_params,
539         .digital_mute   = wm8731_mute,
540         .set_sysclk     = wm8731_set_dai_sysclk,
541         .set_fmt        = wm8731_set_dai_fmt,
542 };
543 
544 static struct snd_soc_dai_driver wm8731_dai = {
545         .name = "wm8731-hifi",
546         .playback = {
547                 .stream_name = "Playback",
548                 .channels_min = 1,
549                 .channels_max = 2,
550                 .rates = WM8731_RATES,
551                 .formats = WM8731_FORMATS,},
552         .capture = {
553                 .stream_name = "Capture",
554                 .channels_min = 1,
555                 .channels_max = 2,
556                 .rates = WM8731_RATES,
557                 .formats = WM8731_FORMATS,},
558         .ops = &wm8731_dai_ops,
559         .symmetric_rates = 1,
560 };
561 
562 #ifdef CONFIG_PM
563 static int wm8731_suspend(struct snd_soc_codec *codec)
564 {
565         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
566 
567         return 0;
568 }
569 
570 static int wm8731_resume(struct snd_soc_codec *codec)
571 {
572         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
573 
574         return 0;
575 }
576 #else
577 #define wm8731_suspend NULL
578 #define wm8731_resume NULL
579 #endif
580 
581 static int wm8731_probe(struct snd_soc_codec *codec)
582 {
583         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
584         int ret = 0, i;
585 
586         codec->control_data = wm8731->regmap;
587         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
588         if (ret < 0) {
589                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
590                 return ret;
591         }
592 
593         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
594                 wm8731->supplies[i].supply = wm8731_supply_names[i];
595 
596         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
597                                  wm8731->supplies);
598         if (ret != 0) {
599                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
600                 return ret;
601         }
602 
603         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
604                                     wm8731->supplies);
605         if (ret != 0) {
606                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
607                 goto err_regulator_get;
608         }
609 
610         ret = wm8731_reset(codec);
611         if (ret < 0) {
612                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
613                 goto err_regulator_enable;
614         }
615 
616         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
617 
618         /* Latch the update bits */
619         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
620         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
621         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
622         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
623 
624         /* Disable bypass path by default */
625         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
626 
627         /* Regulators will have been enabled by bias management */
628         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
629 
630         return 0;
631 
632 err_regulator_enable:
633         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
634 err_regulator_get:
635         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
636 
637         return ret;
638 }
639 
640 /* power down chip */
641 static int wm8731_remove(struct snd_soc_codec *codec)
642 {
643         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
644 
645         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
646 
647         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
648         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
649 
650         return 0;
651 }
652 
653 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
654         .probe =        wm8731_probe,
655         .remove =       wm8731_remove,
656         .suspend =      wm8731_suspend,
657         .resume =       wm8731_resume,
658         .set_bias_level = wm8731_set_bias_level,
659         .dapm_widgets = wm8731_dapm_widgets,
660         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
661         .dapm_routes = wm8731_intercon,
662         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
663         .controls =     wm8731_snd_controls,
664         .num_controls = ARRAY_SIZE(wm8731_snd_controls),
665 };
666 
667 static const struct of_device_id wm8731_of_match[] = {
668         { .compatible = "wlf,wm8731", },
669         { }
670 };
671 
672 MODULE_DEVICE_TABLE(of, wm8731_of_match);
673 
674 static const struct regmap_config wm8731_regmap = {
675         .reg_bits = 7,
676         .val_bits = 9,
677 
678         .max_register = WM8731_RESET,
679         .volatile_reg = wm8731_volatile,
680         .writeable_reg = wm8731_writeable,
681 
682         .cache_type = REGCACHE_RBTREE,
683         .reg_defaults = wm8731_reg_defaults,
684         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
685 };
686 
687 #if defined(CONFIG_SPI_MASTER)
688 static int wm8731_spi_probe(struct spi_device *spi)
689 {
690         struct wm8731_priv *wm8731;
691         int ret;
692 
693         wm8731 = devm_kzalloc(&spi->dev, sizeof(struct wm8731_priv),
694                               GFP_KERNEL);
695         if (wm8731 == NULL)
696                 return -ENOMEM;
697 
698         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
699         if (IS_ERR(wm8731->regmap)) {
700                 ret = PTR_ERR(wm8731->regmap);
701                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
702                         ret);
703                 return ret;
704         }
705 
706         spi_set_drvdata(spi, wm8731);
707 
708         ret = snd_soc_register_codec(&spi->dev,
709                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
710         if (ret != 0) {
711                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
712                 return ret;
713         }
714 
715         return 0;
716 }
717 
718 static int wm8731_spi_remove(struct spi_device *spi)
719 {
720         snd_soc_unregister_codec(&spi->dev);
721         return 0;
722 }
723 
724 static struct spi_driver wm8731_spi_driver = {
725         .driver = {
726                 .name   = "wm8731",
727                 .owner  = THIS_MODULE,
728                 .of_match_table = wm8731_of_match,
729         },
730         .probe          = wm8731_spi_probe,
731         .remove         = wm8731_spi_remove,
732 };
733 #endif /* CONFIG_SPI_MASTER */
734 
735 #if IS_ENABLED(CONFIG_I2C)
736 static int wm8731_i2c_probe(struct i2c_client *i2c,
737                             const struct i2c_device_id *id)
738 {
739         struct wm8731_priv *wm8731;
740         int ret;
741 
742         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
743                               GFP_KERNEL);
744         if (wm8731 == NULL)
745                 return -ENOMEM;
746 
747         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
748         if (IS_ERR(wm8731->regmap)) {
749                 ret = PTR_ERR(wm8731->regmap);
750                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
751                         ret);
752                 return ret;
753         }
754 
755         i2c_set_clientdata(i2c, wm8731);
756 
757         ret = snd_soc_register_codec(&i2c->dev,
758                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
759         if (ret != 0) {
760                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
761                 return ret;
762         }
763 
764         return 0;
765 }
766 
767 static int wm8731_i2c_remove(struct i2c_client *client)
768 {
769         snd_soc_unregister_codec(&client->dev);
770         return 0;
771 }
772 
773 static const struct i2c_device_id wm8731_i2c_id[] = {
774         { "wm8731", 0 },
775         { }
776 };
777 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
778 
779 static struct i2c_driver wm8731_i2c_driver = {
780         .driver = {
781                 .name = "wm8731",
782                 .owner = THIS_MODULE,
783                 .of_match_table = wm8731_of_match,
784         },
785         .probe =    wm8731_i2c_probe,
786         .remove =   wm8731_i2c_remove,
787         .id_table = wm8731_i2c_id,
788 };
789 #endif
790 
791 static int __init wm8731_modinit(void)
792 {
793         int ret = 0;
794 #if IS_ENABLED(CONFIG_I2C)
795         ret = i2c_add_driver(&wm8731_i2c_driver);
796         if (ret != 0) {
797                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
798                        ret);
799         }
800 #endif
801 #if defined(CONFIG_SPI_MASTER)
802         ret = spi_register_driver(&wm8731_spi_driver);
803         if (ret != 0) {
804                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
805                        ret);
806         }
807 #endif
808         return ret;
809 }
810 module_init(wm8731_modinit);
811 
812 static void __exit wm8731_exit(void)
813 {
814 #if IS_ENABLED(CONFIG_I2C)
815         i2c_del_driver(&wm8731_i2c_driver);
816 #endif
817 #if defined(CONFIG_SPI_MASTER)
818         spi_unregister_driver(&wm8731_spi_driver);
819 #endif
820 }
821 module_exit(wm8731_exit);
822 
823 MODULE_DESCRIPTION("ASoC WM8731 driver");
824 MODULE_AUTHOR("Richard Purdie");
825 MODULE_LICENSE("GPL");
826 

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