Version:  2.0.40 2.2.26 2.4.37 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 3.15 3.16 3.17

Linux/sound/soc/codecs/wm8770.c

  1 /*
  2  * wm8770.c  --  WM8770 ALSA SoC Audio driver
  3  *
  4  * Copyright 2010 Wolfson Microelectronics plc
  5  *
  6  * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License version 2 as
 10  * published by the Free Software Foundation.
 11  */
 12 
 13 #include <linux/module.h>
 14 #include <linux/moduleparam.h>
 15 #include <linux/init.h>
 16 #include <linux/delay.h>
 17 #include <linux/of_device.h>
 18 #include <linux/pm.h>
 19 #include <linux/spi/spi.h>
 20 #include <linux/regmap.h>
 21 #include <linux/regulator/consumer.h>
 22 #include <linux/slab.h>
 23 #include <sound/core.h>
 24 #include <sound/pcm.h>
 25 #include <sound/pcm_params.h>
 26 #include <sound/soc.h>
 27 #include <sound/initval.h>
 28 #include <sound/tlv.h>
 29 
 30 #include "wm8770.h"
 31 
 32 #define WM8770_NUM_SUPPLIES 3
 33 static const char *wm8770_supply_names[WM8770_NUM_SUPPLIES] = {
 34         "AVDD1",
 35         "AVDD2",
 36         "DVDD"
 37 };
 38 
 39 static const struct reg_default wm8770_reg_defaults[] = {
 40         {  0, 0x7f },
 41         {  1, 0x7f },
 42         {  2, 0x7f },
 43         {  3, 0x7f },
 44         {  4, 0x7f },
 45         {  5, 0x7f },
 46         {  6, 0x7f },
 47         {  7, 0x7f },
 48         {  8, 0x7f },
 49         {  9, 0xff },
 50         { 10, 0xff },
 51         { 11, 0xff },
 52         { 12, 0xff },
 53         { 13, 0xff },
 54         { 14, 0xff },
 55         { 15, 0xff },
 56         { 16, 0xff },
 57         { 17, 0xff },
 58         { 18, 0    },
 59         { 19, 0x90 },
 60         { 20, 0    },
 61         { 21, 0    },
 62         { 22, 0x22 },
 63         { 23, 0x22 },
 64         { 24, 0x3e },
 65         { 25, 0xc  },
 66         { 26, 0xc  },
 67         { 27, 0x100 },
 68         { 28, 0x189 },
 69         { 29, 0x189 },
 70         { 30, 0x8770 },
 71 };
 72 
 73 static bool wm8770_volatile_reg(struct device *dev, unsigned int reg)
 74 {
 75         switch (reg) {
 76         case WM8770_RESET:
 77                 return true;
 78         default:
 79                 return false;
 80         }
 81 }
 82 
 83 struct wm8770_priv {
 84         struct regmap *regmap;
 85         struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
 86         struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
 87         struct snd_soc_codec *codec;
 88         int sysclk;
 89 };
 90 
 91 static int vout12supply_event(struct snd_soc_dapm_widget *w,
 92         struct snd_kcontrol *kcontrol, int event);
 93 static int vout34supply_event(struct snd_soc_dapm_widget *w,
 94         struct snd_kcontrol *kcontrol, int event);
 95 
 96 /*
 97  * We can't use the same notifier block for more than one supply and
 98  * there's no way I can see to get from a callback to the caller
 99  * except container_of().
100  */
101 #define WM8770_REGULATOR_EVENT(n) \
102 static int wm8770_regulator_event_##n(struct notifier_block *nb, \
103                                       unsigned long event, void *data)    \
104 { \
105         struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
106                                      disable_nb[n]); \
107         if (event & REGULATOR_EVENT_DISABLE) { \
108                 regcache_mark_dirty(wm8770->regmap);    \
109         } \
110         return 0; \
111 }
112 
113 WM8770_REGULATOR_EVENT(0)
114 WM8770_REGULATOR_EVENT(1)
115 WM8770_REGULATOR_EVENT(2)
116 
117 static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
118 static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
119 static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);
120 
121 static const char *dac_phase_text[][2] = {
122         { "DAC1 Normal", "DAC1 Inverted" },
123         { "DAC2 Normal", "DAC2 Inverted" },
124         { "DAC3 Normal", "DAC3 Inverted" },
125         { "DAC4 Normal", "DAC4 Inverted" },
126 };
127 
128 static const struct soc_enum dac_phase[] = {
129         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
130         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
131         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
132         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
133 };
134 
135 static const struct snd_kcontrol_new wm8770_snd_controls[] = {
136         /* global DAC playback controls */
137         SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
138                 dac_dig_tlv),
139         SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
140         SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),
141 
142         /* global VOUT playback controls */
143         SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
144                 dac_alg_tlv),
145         SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),
146 
147         /* VOUT1/2/3/4 specific controls */
148         SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
149                 WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
150         SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
151                 WM8770_VOUT1RVOL, 7, 1, 0),
152         SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
153                 WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
154         SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
155                 WM8770_VOUT2RVOL, 7, 1, 0),
156         SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
157                 WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
158         SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
159                 WM8770_VOUT3RVOL, 7, 1, 0),
160         SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
161                 WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
162         SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
163                 WM8770_VOUT4RVOL, 7, 1, 0),
164 
165         /* DAC1/2/3/4 specific controls */
166         SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
167                 WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
168         SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
169         SOC_ENUM("DAC1 Phase", dac_phase[0]),
170         SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
171                 WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
172         SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),
173         SOC_ENUM("DAC2 Phase", dac_phase[1]),
174         SOC_DOUBLE_R_TLV("DAC3 Playback Volume", WM8770_DAC3LVOL,
175                 WM8770_DAC3RVOL, 0, 255, 0, dac_dig_tlv),
176         SOC_SINGLE("DAC3 Deemphasis Switch", WM8770_DACCTRL2, 2, 1, 0),
177         SOC_ENUM("DAC3 Phase", dac_phase[2]),
178         SOC_DOUBLE_R_TLV("DAC4 Playback Volume", WM8770_DAC4LVOL,
179                 WM8770_DAC4RVOL, 0, 255, 0, dac_dig_tlv),
180         SOC_SINGLE("DAC4 Deemphasis Switch", WM8770_DACCTRL2, 3, 1, 0),
181         SOC_ENUM("DAC4 Phase", dac_phase[3]),
182 
183         /* ADC specific controls */
184         SOC_DOUBLE_R_TLV("Capture Volume", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
185                 0, 31, 0, adc_tlv),
186         SOC_DOUBLE_R("Capture Switch", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
187                 5, 1, 1),
188 
189         /* other controls */
190         SOC_SINGLE("ADC 128x Oversampling Switch", WM8770_MSTRCTRL, 3, 1, 0),
191         SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
192 };
193 
194 static const char *ain_text[] = {
195         "AIN1", "AIN2", "AIN3", "AIN4",
196         "AIN5", "AIN6", "AIN7", "AIN8"
197 };
198 
199 static SOC_ENUM_DOUBLE_DECL(ain_enum,
200                             WM8770_ADCMUX, 0, 4, ain_text);
201 
202 static const struct snd_kcontrol_new ain_mux =
203         SOC_DAPM_ENUM("Capture Mux", ain_enum);
204 
205 static const struct snd_kcontrol_new vout1_mix_controls[] = {
206         SOC_DAPM_SINGLE("DAC1 Switch", WM8770_OUTMUX1, 0, 1, 0),
207         SOC_DAPM_SINGLE("AUX1 Switch", WM8770_OUTMUX1, 1, 1, 0),
208         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 2, 1, 0)
209 };
210 
211 static const struct snd_kcontrol_new vout2_mix_controls[] = {
212         SOC_DAPM_SINGLE("DAC2 Switch", WM8770_OUTMUX1, 3, 1, 0),
213         SOC_DAPM_SINGLE("AUX2 Switch", WM8770_OUTMUX1, 4, 1, 0),
214         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 5, 1, 0)
215 };
216 
217 static const struct snd_kcontrol_new vout3_mix_controls[] = {
218         SOC_DAPM_SINGLE("DAC3 Switch", WM8770_OUTMUX2, 0, 1, 0),
219         SOC_DAPM_SINGLE("AUX3 Switch", WM8770_OUTMUX2, 1, 1, 0),
220         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 2, 1, 0)
221 };
222 
223 static const struct snd_kcontrol_new vout4_mix_controls[] = {
224         SOC_DAPM_SINGLE("DAC4 Switch", WM8770_OUTMUX2, 3, 1, 0),
225         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 4, 1, 0)
226 };
227 
228 static const struct snd_soc_dapm_widget wm8770_dapm_widgets[] = {
229         SND_SOC_DAPM_INPUT("AUX1"),
230         SND_SOC_DAPM_INPUT("AUX2"),
231         SND_SOC_DAPM_INPUT("AUX3"),
232 
233         SND_SOC_DAPM_INPUT("AIN1"),
234         SND_SOC_DAPM_INPUT("AIN2"),
235         SND_SOC_DAPM_INPUT("AIN3"),
236         SND_SOC_DAPM_INPUT("AIN4"),
237         SND_SOC_DAPM_INPUT("AIN5"),
238         SND_SOC_DAPM_INPUT("AIN6"),
239         SND_SOC_DAPM_INPUT("AIN7"),
240         SND_SOC_DAPM_INPUT("AIN8"),
241 
242         SND_SOC_DAPM_MUX("Capture Mux", WM8770_ADCMUX, 8, 1, &ain_mux),
243 
244         SND_SOC_DAPM_ADC("ADC", "Capture", WM8770_PWDNCTRL, 1, 1),
245 
246         SND_SOC_DAPM_DAC("DAC1", "Playback", WM8770_PWDNCTRL, 2, 1),
247         SND_SOC_DAPM_DAC("DAC2", "Playback", WM8770_PWDNCTRL, 3, 1),
248         SND_SOC_DAPM_DAC("DAC3", "Playback", WM8770_PWDNCTRL, 4, 1),
249         SND_SOC_DAPM_DAC("DAC4", "Playback", WM8770_PWDNCTRL, 5, 1),
250 
251         SND_SOC_DAPM_SUPPLY("VOUT12 Supply", SND_SOC_NOPM, 0, 0,
252                 vout12supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
253         SND_SOC_DAPM_SUPPLY("VOUT34 Supply", SND_SOC_NOPM, 0, 0,
254                 vout34supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
255 
256         SND_SOC_DAPM_MIXER("VOUT1 Mixer", SND_SOC_NOPM, 0, 0,
257                 vout1_mix_controls, ARRAY_SIZE(vout1_mix_controls)),
258         SND_SOC_DAPM_MIXER("VOUT2 Mixer", SND_SOC_NOPM, 0, 0,
259                 vout2_mix_controls, ARRAY_SIZE(vout2_mix_controls)),
260         SND_SOC_DAPM_MIXER("VOUT3 Mixer", SND_SOC_NOPM, 0, 0,
261                 vout3_mix_controls, ARRAY_SIZE(vout3_mix_controls)),
262         SND_SOC_DAPM_MIXER("VOUT4 Mixer", SND_SOC_NOPM, 0, 0,
263                 vout4_mix_controls, ARRAY_SIZE(vout4_mix_controls)),
264 
265         SND_SOC_DAPM_OUTPUT("VOUT1"),
266         SND_SOC_DAPM_OUTPUT("VOUT2"),
267         SND_SOC_DAPM_OUTPUT("VOUT3"),
268         SND_SOC_DAPM_OUTPUT("VOUT4")
269 };
270 
271 static const struct snd_soc_dapm_route wm8770_intercon[] = {
272         { "Capture Mux", "AIN1", "AIN1" },
273         { "Capture Mux", "AIN2", "AIN2" },
274         { "Capture Mux", "AIN3", "AIN3" },
275         { "Capture Mux", "AIN4", "AIN4" },
276         { "Capture Mux", "AIN5", "AIN5" },
277         { "Capture Mux", "AIN6", "AIN6" },
278         { "Capture Mux", "AIN7", "AIN7" },
279         { "Capture Mux", "AIN8", "AIN8" },
280 
281         { "ADC", NULL, "Capture Mux" },
282 
283         { "VOUT1 Mixer", NULL, "VOUT12 Supply" },
284         { "VOUT1 Mixer", "DAC1 Switch", "DAC1" },
285         { "VOUT1 Mixer", "AUX1 Switch", "AUX1" },
286         { "VOUT1 Mixer", "Bypass Switch", "Capture Mux" },
287 
288         { "VOUT2 Mixer", NULL, "VOUT12 Supply" },
289         { "VOUT2 Mixer", "DAC2 Switch", "DAC2" },
290         { "VOUT2 Mixer", "AUX2 Switch", "AUX2" },
291         { "VOUT2 Mixer", "Bypass Switch", "Capture Mux" },
292 
293         { "VOUT3 Mixer", NULL, "VOUT34 Supply" },
294         { "VOUT3 Mixer", "DAC3 Switch", "DAC3" },
295         { "VOUT3 Mixer", "AUX3 Switch", "AUX3" },
296         { "VOUT3 Mixer", "Bypass Switch", "Capture Mux" },
297 
298         { "VOUT4 Mixer", NULL, "VOUT34 Supply" },
299         { "VOUT4 Mixer", "DAC4 Switch", "DAC4" },
300         { "VOUT4 Mixer", "Bypass Switch", "Capture Mux" },
301 
302         { "VOUT1", NULL, "VOUT1 Mixer" },
303         { "VOUT2", NULL, "VOUT2 Mixer" },
304         { "VOUT3", NULL, "VOUT3 Mixer" },
305         { "VOUT4", NULL, "VOUT4 Mixer" }
306 };
307 
308 static int vout12supply_event(struct snd_soc_dapm_widget *w,
309         struct snd_kcontrol *kcontrol, int event)
310 {
311         struct snd_soc_codec *codec;
312 
313         codec = w->codec;
314 
315         switch (event) {
316         case SND_SOC_DAPM_PRE_PMU:
317                 snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0);
318                 break;
319         case SND_SOC_DAPM_POST_PMD:
320                 snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0x180);
321                 break;
322         }
323 
324         return 0;
325 }
326 
327 static int vout34supply_event(struct snd_soc_dapm_widget *w,
328         struct snd_kcontrol *kcontrol, int event)
329 {
330         struct snd_soc_codec *codec;
331 
332         codec = w->codec;
333 
334         switch (event) {
335         case SND_SOC_DAPM_PRE_PMU:
336                 snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0);
337                 break;
338         case SND_SOC_DAPM_POST_PMD:
339                 snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0x180);
340                 break;
341         }
342 
343         return 0;
344 }
345 
346 static int wm8770_reset(struct snd_soc_codec *codec)
347 {
348         return snd_soc_write(codec, WM8770_RESET, 0);
349 }
350 
351 static int wm8770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
352 {
353         struct snd_soc_codec *codec;
354         int iface, master;
355 
356         codec = dai->codec;
357 
358         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
359         case SND_SOC_DAIFMT_CBM_CFM:
360                 master = 0x100;
361                 break;
362         case SND_SOC_DAIFMT_CBS_CFS:
363                 master = 0;
364                 break;
365         default:
366                 return -EINVAL;
367         }
368 
369         iface = 0;
370         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
371         case SND_SOC_DAIFMT_I2S:
372                 iface |= 0x2;
373                 break;
374         case SND_SOC_DAIFMT_RIGHT_J:
375                 break;
376         case SND_SOC_DAIFMT_LEFT_J:
377                 iface |= 0x1;
378                 break;
379         default:
380                 return -EINVAL;
381         }
382 
383         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
384         case SND_SOC_DAIFMT_NB_NF:
385                 break;
386         case SND_SOC_DAIFMT_IB_IF:
387                 iface |= 0xc;
388                 break;
389         case SND_SOC_DAIFMT_IB_NF:
390                 iface |= 0x8;
391                 break;
392         case SND_SOC_DAIFMT_NB_IF:
393                 iface |= 0x4;
394                 break;
395         default:
396                 return -EINVAL;
397         }
398 
399         snd_soc_update_bits(codec, WM8770_IFACECTRL, 0xf, iface);
400         snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x100, master);
401 
402         return 0;
403 }
404 
405 static const int mclk_ratios[] = {
406         128,
407         192,
408         256,
409         384,
410         512,
411         768
412 };
413 
414 static int wm8770_hw_params(struct snd_pcm_substream *substream,
415                             struct snd_pcm_hw_params *params,
416                             struct snd_soc_dai *dai)
417 {
418         struct snd_soc_codec *codec;
419         struct wm8770_priv *wm8770;
420         int i;
421         int iface;
422         int shift;
423         int ratio;
424 
425         codec = dai->codec;
426         wm8770 = snd_soc_codec_get_drvdata(codec);
427 
428         iface = 0;
429         switch (params_width(params)) {
430         case 16:
431                 break;
432         case 20:
433                 iface |= 0x10;
434                 break;
435         case 24:
436                 iface |= 0x20;
437                 break;
438         case 32:
439                 iface |= 0x30;
440                 break;
441         }
442 
443         switch (substream->stream) {
444         case SNDRV_PCM_STREAM_PLAYBACK:
445                 i = 0;
446                 shift = 4;
447                 break;
448         case SNDRV_PCM_STREAM_CAPTURE:
449                 i = 2;
450                 shift = 0;
451                 break;
452         default:
453                 return -EINVAL;
454         }
455 
456         /* Only need to set MCLK/LRCLK ratio if we're master */
457         if (snd_soc_read(codec, WM8770_MSTRCTRL) & 0x100) {
458                 for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
459                         ratio = wm8770->sysclk / params_rate(params);
460                         if (ratio == mclk_ratios[i])
461                                 break;
462                 }
463 
464                 if (i == ARRAY_SIZE(mclk_ratios)) {
465                         dev_err(codec->dev,
466                                 "Unable to configure MCLK ratio %d/%d\n",
467                                 wm8770->sysclk, params_rate(params));
468                         return -EINVAL;
469                 }
470 
471                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
472 
473                 snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x7 << shift,
474                                     i << shift);
475         }
476 
477         snd_soc_update_bits(codec, WM8770_IFACECTRL, 0x30, iface);
478 
479         return 0;
480 }
481 
482 static int wm8770_mute(struct snd_soc_dai *dai, int mute)
483 {
484         struct snd_soc_codec *codec;
485 
486         codec = dai->codec;
487         return snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10,
488                                    !!mute << 4);
489 }
490 
491 static int wm8770_set_sysclk(struct snd_soc_dai *dai,
492                              int clk_id, unsigned int freq, int dir)
493 {
494         struct snd_soc_codec *codec;
495         struct wm8770_priv *wm8770;
496 
497         codec = dai->codec;
498         wm8770 = snd_soc_codec_get_drvdata(codec);
499         wm8770->sysclk = freq;
500         return 0;
501 }
502 
503 static int wm8770_set_bias_level(struct snd_soc_codec *codec,
504                                  enum snd_soc_bias_level level)
505 {
506         int ret;
507         struct wm8770_priv *wm8770;
508 
509         wm8770 = snd_soc_codec_get_drvdata(codec);
510 
511         switch (level) {
512         case SND_SOC_BIAS_ON:
513                 break;
514         case SND_SOC_BIAS_PREPARE:
515                 break;
516         case SND_SOC_BIAS_STANDBY:
517                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
518                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
519                                                     wm8770->supplies);
520                         if (ret) {
521                                 dev_err(codec->dev,
522                                         "Failed to enable supplies: %d\n",
523                                         ret);
524                                 return ret;
525                         }
526 
527                         regcache_sync(wm8770->regmap);
528 
529                         /* global powerup */
530                         snd_soc_write(codec, WM8770_PWDNCTRL, 0);
531                 }
532                 break;
533         case SND_SOC_BIAS_OFF:
534                 /* global powerdown */
535                 snd_soc_write(codec, WM8770_PWDNCTRL, 1);
536                 regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
537                                        wm8770->supplies);
538                 break;
539         }
540 
541         codec->dapm.bias_level = level;
542         return 0;
543 }
544 
545 #define WM8770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
546                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
547 
548 static const struct snd_soc_dai_ops wm8770_dai_ops = {
549         .digital_mute = wm8770_mute,
550         .hw_params = wm8770_hw_params,
551         .set_fmt = wm8770_set_fmt,
552         .set_sysclk = wm8770_set_sysclk,
553 };
554 
555 static struct snd_soc_dai_driver wm8770_dai = {
556         .name = "wm8770-hifi",
557         .playback = {
558                 .stream_name = "Playback",
559                 .channels_min = 2,
560                 .channels_max = 2,
561                 .rates = SNDRV_PCM_RATE_8000_192000,
562                 .formats = WM8770_FORMATS
563         },
564         .capture = {
565                 .stream_name = "Capture",
566                 .channels_min = 2,
567                 .channels_max = 2,
568                 .rates = SNDRV_PCM_RATE_8000_96000,
569                 .formats = WM8770_FORMATS
570         },
571         .ops = &wm8770_dai_ops,
572         .symmetric_rates = 1
573 };
574 
575 static int wm8770_probe(struct snd_soc_codec *codec)
576 {
577         struct wm8770_priv *wm8770;
578         int ret;
579 
580         wm8770 = snd_soc_codec_get_drvdata(codec);
581         wm8770->codec = codec;
582 
583         ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
584                                     wm8770->supplies);
585         if (ret) {
586                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
587                 return ret;
588         }
589 
590         ret = wm8770_reset(codec);
591         if (ret < 0) {
592                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
593                 goto err_reg_enable;
594         }
595 
596         /* latch the volume update bits */
597         snd_soc_update_bits(codec, WM8770_MSDIGVOL, 0x100, 0x100);
598         snd_soc_update_bits(codec, WM8770_MSALGVOL, 0x100, 0x100);
599         snd_soc_update_bits(codec, WM8770_VOUT1RVOL, 0x100, 0x100);
600         snd_soc_update_bits(codec, WM8770_VOUT2RVOL, 0x100, 0x100);
601         snd_soc_update_bits(codec, WM8770_VOUT3RVOL, 0x100, 0x100);
602         snd_soc_update_bits(codec, WM8770_VOUT4RVOL, 0x100, 0x100);
603         snd_soc_update_bits(codec, WM8770_DAC1RVOL, 0x100, 0x100);
604         snd_soc_update_bits(codec, WM8770_DAC2RVOL, 0x100, 0x100);
605         snd_soc_update_bits(codec, WM8770_DAC3RVOL, 0x100, 0x100);
606         snd_soc_update_bits(codec, WM8770_DAC4RVOL, 0x100, 0x100);
607 
608         /* mute all DACs */
609         snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10, 0x10);
610 
611 err_reg_enable:
612         regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
613         return ret;
614 }
615 
616 static struct snd_soc_codec_driver soc_codec_dev_wm8770 = {
617         .probe = wm8770_probe,
618         .set_bias_level = wm8770_set_bias_level,
619         .idle_bias_off = true,
620 
621         .controls = wm8770_snd_controls,
622         .num_controls = ARRAY_SIZE(wm8770_snd_controls),
623         .dapm_widgets = wm8770_dapm_widgets,
624         .num_dapm_widgets = ARRAY_SIZE(wm8770_dapm_widgets),
625         .dapm_routes = wm8770_intercon,
626         .num_dapm_routes = ARRAY_SIZE(wm8770_intercon),
627 };
628 
629 static const struct of_device_id wm8770_of_match[] = {
630         { .compatible = "wlf,wm8770", },
631         { }
632 };
633 MODULE_DEVICE_TABLE(of, wm8770_of_match);
634 
635 static const struct regmap_config wm8770_regmap = {
636         .reg_bits = 7,
637         .val_bits = 9,
638         .max_register = WM8770_RESET,
639 
640         .reg_defaults = wm8770_reg_defaults,
641         .num_reg_defaults = ARRAY_SIZE(wm8770_reg_defaults),
642         .cache_type = REGCACHE_RBTREE,
643 
644         .volatile_reg = wm8770_volatile_reg,
645 };
646 
647 static int wm8770_spi_probe(struct spi_device *spi)
648 {
649         struct wm8770_priv *wm8770;
650         int ret, i;
651 
652         wm8770 = devm_kzalloc(&spi->dev, sizeof(struct wm8770_priv),
653                               GFP_KERNEL);
654         if (!wm8770)
655                 return -ENOMEM;
656 
657         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
658                 wm8770->supplies[i].supply = wm8770_supply_names[i];
659 
660         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8770->supplies),
661                                       wm8770->supplies);
662         if (ret) {
663                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
664                 return ret;
665         }
666 
667         wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
668         wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
669         wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;
670 
671         /* This should really be moved into the regulator core */
672         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
673                 ret = regulator_register_notifier(wm8770->supplies[i].consumer,
674                                                   &wm8770->disable_nb[i]);
675                 if (ret) {
676                         dev_err(&spi->dev,
677                                 "Failed to register regulator notifier: %d\n",
678                                 ret);
679                 }
680         }
681 
682         wm8770->regmap = devm_regmap_init_spi(spi, &wm8770_regmap);
683         if (IS_ERR(wm8770->regmap))
684                 return PTR_ERR(wm8770->regmap);
685 
686         spi_set_drvdata(spi, wm8770);
687 
688         ret = snd_soc_register_codec(&spi->dev,
689                                      &soc_codec_dev_wm8770, &wm8770_dai, 1);
690 
691         return ret;
692 }
693 
694 static int wm8770_spi_remove(struct spi_device *spi)
695 {
696         struct wm8770_priv *wm8770 = spi_get_drvdata(spi);
697         int i;
698 
699         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); ++i)
700                 regulator_unregister_notifier(wm8770->supplies[i].consumer,
701                                               &wm8770->disable_nb[i]);
702 
703         snd_soc_unregister_codec(&spi->dev);
704 
705         return 0;
706 }
707 
708 static struct spi_driver wm8770_spi_driver = {
709         .driver = {
710                 .name = "wm8770",
711                 .owner = THIS_MODULE,
712                 .of_match_table = wm8770_of_match,
713         },
714         .probe = wm8770_spi_probe,
715         .remove = wm8770_spi_remove
716 };
717 
718 module_spi_driver(wm8770_spi_driver);
719 
720 MODULE_DESCRIPTION("ASoC WM8770 driver");
721 MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
722 MODULE_LICENSE("GPL");
723 

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