Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

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 #define wm8731_reset(m) regmap_write(m, WM8731_RESET, 0)
 83 
 84 static const char *wm8731_input_select[] = {"Line In", "Mic"};
 85 
 86 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum,
 87                             WM8731_APANA, 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_soc_kcontrol_codec(kcontrol);
123         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
124 
125         ucontrol->value.integer.value[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_soc_kcontrol_codec(kcontrol);
134         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
135         unsigned int deemph = ucontrol->value.integer.value[0];
136         int ret = 0;
137 
138         if (deemph > 1)
139                 return -EINVAL;
140 
141         mutex_lock(&wm8731->lock);
142         if (wm8731->deemph != deemph) {
143                 wm8731->deemph = deemph;
144 
145                 wm8731_set_deemph(codec);
146 
147                 ret = 1;
148         }
149         mutex_unlock(&wm8731->lock);
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 snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm);
218         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
219 
220         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
221 }
222 
223 static const struct snd_soc_dapm_route wm8731_intercon[] = {
224         {"DAC", NULL, "OSC", wm8731_check_osc},
225         {"ADC", NULL, "OSC", wm8731_check_osc},
226         {"DAC", NULL, "ACTIVE"},
227         {"ADC", NULL, "ACTIVE"},
228 
229         /* output mixer */
230         {"Output Mixer", "Line Bypass Switch", "Line Input"},
231         {"Output Mixer", "HiFi Playback Switch", "DAC"},
232         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
233 
234         /* outputs */
235         {"RHPOUT", NULL, "Output Mixer"},
236         {"ROUT", NULL, "Output Mixer"},
237         {"LHPOUT", NULL, "Output Mixer"},
238         {"LOUT", NULL, "Output Mixer"},
239 
240         /* input mux */
241         {"Input Mux", "Line In", "Line Input"},
242         {"Input Mux", "Mic", "Mic Bias"},
243         {"ADC", NULL, "Input Mux"},
244 
245         /* inputs */
246         {"Line Input", NULL, "LLINEIN"},
247         {"Line Input", NULL, "RLINEIN"},
248         {"Mic Bias", NULL, "MICIN"},
249 };
250 
251 struct _coeff_div {
252         u32 mclk;
253         u32 rate;
254         u16 fs;
255         u8 sr:4;
256         u8 bosr:1;
257         u8 usb:1;
258 };
259 
260 /* codec mclk clock divider coefficients */
261 static const struct _coeff_div coeff_div[] = {
262         /* 48k */
263         {12288000, 48000, 256, 0x0, 0x0, 0x0},
264         {18432000, 48000, 384, 0x0, 0x1, 0x0},
265         {12000000, 48000, 250, 0x0, 0x0, 0x1},
266 
267         /* 32k */
268         {12288000, 32000, 384, 0x6, 0x0, 0x0},
269         {18432000, 32000, 576, 0x6, 0x1, 0x0},
270         {12000000, 32000, 375, 0x6, 0x0, 0x1},
271 
272         /* 8k */
273         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
274         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
275         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
276         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
277         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
278 
279         /* 96k */
280         {12288000, 96000, 128, 0x7, 0x0, 0x0},
281         {18432000, 96000, 192, 0x7, 0x1, 0x0},
282         {12000000, 96000, 125, 0x7, 0x0, 0x1},
283 
284         /* 44.1k */
285         {11289600, 44100, 256, 0x8, 0x0, 0x0},
286         {16934400, 44100, 384, 0x8, 0x1, 0x0},
287         {12000000, 44100, 272, 0x8, 0x1, 0x1},
288 
289         /* 88.2k */
290         {11289600, 88200, 128, 0xf, 0x0, 0x0},
291         {16934400, 88200, 192, 0xf, 0x1, 0x0},
292         {12000000, 88200, 136, 0xf, 0x1, 0x1},
293 };
294 
295 /* rates constraints */
296 static const unsigned int wm8731_rates_12000000[] = {
297         8000, 32000, 44100, 48000, 96000, 88200,
298 };
299 
300 static const unsigned int wm8731_rates_12288000_18432000[] = {
301         8000, 32000, 48000, 96000,
302 };
303 
304 static const unsigned int wm8731_rates_11289600_16934400[] = {
305         8000, 44100, 88200,
306 };
307 
308 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
309         .list = wm8731_rates_12000000,
310         .count = ARRAY_SIZE(wm8731_rates_12000000),
311 };
312 
313 static const
314 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
315         .list = wm8731_rates_12288000_18432000,
316         .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
317 };
318 
319 static const
320 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
321         .list = wm8731_rates_11289600_16934400,
322         .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
323 };
324 
325 static inline int get_coeff(int mclk, int rate)
326 {
327         int i;
328 
329         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
330                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
331                         return i;
332         }
333         return 0;
334 }
335 
336 static int wm8731_hw_params(struct snd_pcm_substream *substream,
337                             struct snd_pcm_hw_params *params,
338                             struct snd_soc_dai *dai)
339 {
340         struct snd_soc_codec *codec = dai->codec;
341         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
342         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
343         int i = get_coeff(wm8731->sysclk, params_rate(params));
344         u16 srate = (coeff_div[i].sr << 2) |
345                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
346 
347         wm8731->playback_fs = params_rate(params);
348 
349         snd_soc_write(codec, WM8731_SRATE, srate);
350 
351         /* bit size */
352         switch (params_width(params)) {
353         case 16:
354                 break;
355         case 20:
356                 iface |= 0x0004;
357                 break;
358         case 24:
359                 iface |= 0x0008;
360                 break;
361         case 32:
362                 iface |= 0x000c;
363                 break;
364         }
365 
366         wm8731_set_deemph(codec);
367 
368         snd_soc_write(codec, WM8731_IFACE, iface);
369         return 0;
370 }
371 
372 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
373 {
374         struct snd_soc_codec *codec = dai->codec;
375         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
376 
377         if (mute)
378                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
379         else
380                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
381         return 0;
382 }
383 
384 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
385                 int clk_id, unsigned int freq, int dir)
386 {
387         struct snd_soc_codec *codec = codec_dai->codec;
388         struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
389         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
390 
391         switch (clk_id) {
392         case WM8731_SYSCLK_XTAL:
393         case WM8731_SYSCLK_MCLK:
394                 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
395                         return -EINVAL;
396                 wm8731->sysclk_type = clk_id;
397                 break;
398         default:
399                 return -EINVAL;
400         }
401 
402         switch (freq) {
403         case 0:
404                 wm8731->constraints = NULL;
405                 break;
406         case 12000000:
407                 wm8731->constraints = &wm8731_constraints_12000000;
408                 break;
409         case 12288000:
410         case 18432000:
411                 wm8731->constraints = &wm8731_constraints_12288000_18432000;
412                 break;
413         case 16934400:
414         case 11289600:
415                 wm8731->constraints = &wm8731_constraints_11289600_16934400;
416                 break;
417         default:
418                 return -EINVAL;
419         }
420 
421         wm8731->sysclk = freq;
422 
423         snd_soc_dapm_sync(dapm);
424 
425         return 0;
426 }
427 
428 
429 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
430                 unsigned int fmt)
431 {
432         struct snd_soc_codec *codec = codec_dai->codec;
433         u16 iface = 0;
434 
435         /* set master/slave audio interface */
436         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
437         case SND_SOC_DAIFMT_CBM_CFM:
438                 iface |= 0x0040;
439                 break;
440         case SND_SOC_DAIFMT_CBS_CFS:
441                 break;
442         default:
443                 return -EINVAL;
444         }
445 
446         /* interface format */
447         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
448         case SND_SOC_DAIFMT_I2S:
449                 iface |= 0x0002;
450                 break;
451         case SND_SOC_DAIFMT_RIGHT_J:
452                 break;
453         case SND_SOC_DAIFMT_LEFT_J:
454                 iface |= 0x0001;
455                 break;
456         case SND_SOC_DAIFMT_DSP_A:
457                 iface |= 0x0013;
458                 break;
459         case SND_SOC_DAIFMT_DSP_B:
460                 iface |= 0x0003;
461                 break;
462         default:
463                 return -EINVAL;
464         }
465 
466         /* clock inversion */
467         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
468         case SND_SOC_DAIFMT_NB_NF:
469                 break;
470         case SND_SOC_DAIFMT_IB_IF:
471                 iface |= 0x0090;
472                 break;
473         case SND_SOC_DAIFMT_IB_NF:
474                 iface |= 0x0080;
475                 break;
476         case SND_SOC_DAIFMT_NB_IF:
477                 iface |= 0x0010;
478                 break;
479         default:
480                 return -EINVAL;
481         }
482 
483         /* set iface */
484         snd_soc_write(codec, WM8731_IFACE, iface);
485         return 0;
486 }
487 
488 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
489                                  enum snd_soc_bias_level level)
490 {
491         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
492         int ret;
493         u16 reg;
494 
495         switch (level) {
496         case SND_SOC_BIAS_ON:
497                 if (wm8731->mclk) {
498                         ret = clk_prepare_enable(wm8731->mclk);
499                         if (ret)
500                                 return ret;
501                 }
502                 break;
503         case SND_SOC_BIAS_PREPARE:
504                 break;
505         case SND_SOC_BIAS_STANDBY:
506                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
507                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
508                                                     wm8731->supplies);
509                         if (ret != 0)
510                                 return ret;
511 
512                         regcache_sync(wm8731->regmap);
513                 }
514 
515                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
516                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
517                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
518                 break;
519         case SND_SOC_BIAS_OFF:
520                 if (wm8731->mclk)
521                         clk_disable_unprepare(wm8731->mclk);
522                 snd_soc_write(codec, WM8731_PWR, 0xffff);
523                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
524                                        wm8731->supplies);
525                 regcache_mark_dirty(wm8731->regmap);
526                 break;
527         }
528         return 0;
529 }
530 
531 static int wm8731_startup(struct snd_pcm_substream *substream,
532         struct snd_soc_dai *dai)
533 {
534         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
535 
536         if (wm8731->constraints)
537                 snd_pcm_hw_constraint_list(substream->runtime, 0,
538                                            SNDRV_PCM_HW_PARAM_RATE,
539                                            wm8731->constraints);
540 
541         return 0;
542 }
543 
544 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
545 
546 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
547         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
548 
549 static const struct snd_soc_dai_ops wm8731_dai_ops = {
550         .startup        = wm8731_startup,
551         .hw_params      = wm8731_hw_params,
552         .digital_mute   = wm8731_mute,
553         .set_sysclk     = wm8731_set_dai_sysclk,
554         .set_fmt        = wm8731_set_dai_fmt,
555 };
556 
557 static struct snd_soc_dai_driver wm8731_dai = {
558         .name = "wm8731-hifi",
559         .playback = {
560                 .stream_name = "Playback",
561                 .channels_min = 1,
562                 .channels_max = 2,
563                 .rates = WM8731_RATES,
564                 .formats = WM8731_FORMATS,},
565         .capture = {
566                 .stream_name = "Capture",
567                 .channels_min = 1,
568                 .channels_max = 2,
569                 .rates = WM8731_RATES,
570                 .formats = WM8731_FORMATS,},
571         .ops = &wm8731_dai_ops,
572         .symmetric_rates = 1,
573 };
574 
575 static int wm8731_request_supplies(struct device *dev,
576                 struct wm8731_priv *wm8731)
577 {
578         int ret = 0, i;
579 
580         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
581                 wm8731->supplies[i].supply = wm8731_supply_names[i];
582 
583         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8731->supplies),
584                                  wm8731->supplies);
585         if (ret != 0) {
586                 dev_err(dev, "Failed to request supplies: %d\n", ret);
587                 return ret;
588         }
589 
590         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
591                                     wm8731->supplies);
592         if (ret != 0) {
593                 dev_err(dev, "Failed to enable supplies: %d\n", ret);
594                 return ret;
595         }
596 
597         return 0;
598 }
599 
600 static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
601 {
602         int ret = 0;
603 
604         ret = wm8731_reset(wm8731->regmap);
605         if (ret < 0) {
606                 dev_err(dev, "Failed to issue reset: %d\n", ret);
607                 goto err_regulator_enable;
608         }
609 
610         /* Clear POWEROFF, keep everything else disabled */
611         regmap_write(wm8731->regmap, WM8731_PWR, 0x7f);
612 
613         /* Latch the update bits */
614         regmap_update_bits(wm8731->regmap, WM8731_LOUT1V, 0x100, 0);
615         regmap_update_bits(wm8731->regmap, WM8731_ROUT1V, 0x100, 0);
616         regmap_update_bits(wm8731->regmap, WM8731_LINVOL, 0x100, 0);
617         regmap_update_bits(wm8731->regmap, WM8731_RINVOL, 0x100, 0);
618 
619         /* Disable bypass path by default */
620         regmap_update_bits(wm8731->regmap, WM8731_APANA, 0x8, 0);
621 
622         regcache_mark_dirty(wm8731->regmap);
623 
624 err_regulator_enable:
625         /* Regulators will be enabled by bias management */
626         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
627 
628         return ret;
629 }
630 
631 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
632         .set_bias_level = wm8731_set_bias_level,
633         .suspend_bias_off = true,
634 
635         .dapm_widgets = wm8731_dapm_widgets,
636         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
637         .dapm_routes = wm8731_intercon,
638         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
639         .controls =     wm8731_snd_controls,
640         .num_controls = ARRAY_SIZE(wm8731_snd_controls),
641 };
642 
643 static const struct of_device_id wm8731_of_match[] = {
644         { .compatible = "wlf,wm8731", },
645         { }
646 };
647 
648 MODULE_DEVICE_TABLE(of, wm8731_of_match);
649 
650 static const struct regmap_config wm8731_regmap = {
651         .reg_bits = 7,
652         .val_bits = 9,
653 
654         .max_register = WM8731_RESET,
655         .volatile_reg = wm8731_volatile,
656 
657         .cache_type = REGCACHE_RBTREE,
658         .reg_defaults = wm8731_reg_defaults,
659         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
660 };
661 
662 #if defined(CONFIG_SPI_MASTER)
663 static int wm8731_spi_probe(struct spi_device *spi)
664 {
665         struct wm8731_priv *wm8731;
666         int ret;
667 
668         wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
669         if (wm8731 == NULL)
670                 return -ENOMEM;
671 
672         wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
673         if (IS_ERR(wm8731->mclk)) {
674                 ret = PTR_ERR(wm8731->mclk);
675                 if (ret == -ENOENT) {
676                         wm8731->mclk = NULL;
677                         dev_warn(&spi->dev, "Assuming static MCLK\n");
678                 } else {
679                         dev_err(&spi->dev, "Failed to get MCLK: %d\n",
680                                 ret);
681                         return ret;
682                 }
683         }
684 
685         mutex_init(&wm8731->lock);
686 
687         spi_set_drvdata(spi, wm8731);
688 
689         ret = wm8731_request_supplies(&spi->dev, wm8731);
690         if (ret != 0)
691                 return ret;
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         ret = wm8731_hw_init(&spi->dev, wm8731);
702         if (ret != 0)
703                 return ret;
704 
705         ret = snd_soc_register_codec(&spi->dev,
706                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
707         if (ret != 0) {
708                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
709                 return ret;
710         }
711 
712         return 0;
713 }
714 
715 static int wm8731_spi_remove(struct spi_device *spi)
716 {
717         snd_soc_unregister_codec(&spi->dev);
718         return 0;
719 }
720 
721 static struct spi_driver wm8731_spi_driver = {
722         .driver = {
723                 .name   = "wm8731",
724                 .of_match_table = wm8731_of_match,
725         },
726         .probe          = wm8731_spi_probe,
727         .remove         = wm8731_spi_remove,
728 };
729 #endif /* CONFIG_SPI_MASTER */
730 
731 #if IS_ENABLED(CONFIG_I2C)
732 static int wm8731_i2c_probe(struct i2c_client *i2c,
733                             const struct i2c_device_id *id)
734 {
735         struct wm8731_priv *wm8731;
736         int ret;
737 
738         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
739                               GFP_KERNEL);
740         if (wm8731 == NULL)
741                 return -ENOMEM;
742 
743         wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
744         if (IS_ERR(wm8731->mclk)) {
745                 ret = PTR_ERR(wm8731->mclk);
746                 if (ret == -ENOENT) {
747                         wm8731->mclk = NULL;
748                         dev_warn(&i2c->dev, "Assuming static MCLK\n");
749                 } else {
750                         dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
751                                 ret);
752                         return ret;
753                 }
754         }
755 
756         mutex_init(&wm8731->lock);
757 
758         i2c_set_clientdata(i2c, wm8731);
759 
760         ret = wm8731_request_supplies(&i2c->dev, wm8731);
761         if (ret != 0)
762                 return ret;
763 
764         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
765         if (IS_ERR(wm8731->regmap)) {
766                 ret = PTR_ERR(wm8731->regmap);
767                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
768                         ret);
769                 return ret;
770         }
771 
772         ret = wm8731_hw_init(&i2c->dev, wm8731);
773         if (ret != 0)
774                 return ret;
775 
776         ret = snd_soc_register_codec(&i2c->dev,
777                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
778         if (ret != 0) {
779                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
780                 return ret;
781         }
782 
783         return 0;
784 }
785 
786 static int wm8731_i2c_remove(struct i2c_client *client)
787 {
788         snd_soc_unregister_codec(&client->dev);
789         return 0;
790 }
791 
792 static const struct i2c_device_id wm8731_i2c_id[] = {
793         { "wm8731", 0 },
794         { }
795 };
796 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
797 
798 static struct i2c_driver wm8731_i2c_driver = {
799         .driver = {
800                 .name = "wm8731",
801                 .of_match_table = wm8731_of_match,
802         },
803         .probe =    wm8731_i2c_probe,
804         .remove =   wm8731_i2c_remove,
805         .id_table = wm8731_i2c_id,
806 };
807 #endif
808 
809 static int __init wm8731_modinit(void)
810 {
811         int ret = 0;
812 #if IS_ENABLED(CONFIG_I2C)
813         ret = i2c_add_driver(&wm8731_i2c_driver);
814         if (ret != 0) {
815                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
816                        ret);
817         }
818 #endif
819 #if defined(CONFIG_SPI_MASTER)
820         ret = spi_register_driver(&wm8731_spi_driver);
821         if (ret != 0) {
822                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
823                        ret);
824         }
825 #endif
826         return ret;
827 }
828 module_init(wm8731_modinit);
829 
830 static void __exit wm8731_exit(void)
831 {
832 #if IS_ENABLED(CONFIG_I2C)
833         i2c_del_driver(&wm8731_i2c_driver);
834 #endif
835 #if defined(CONFIG_SPI_MASTER)
836         spi_unregister_driver(&wm8731_spi_driver);
837 #endif
838 }
839 module_exit(wm8731_exit);
840 
841 MODULE_DESCRIPTION("ASoC WM8731 driver");
842 MODULE_AUTHOR("Richard Purdie");
843 MODULE_LICENSE("GPL");
844 

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