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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/cs42l51.c

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  1 /*
  2  * cs42l51.c
  3  *
  4  * ASoC Driver for Cirrus Logic CS42L51 codecs
  5  *
  6  * Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
  7  *
  8  * Based on cs4270.c - Copyright (c) Freescale Semiconductor
  9  *
 10  * This program is free software; you can redistribute it and/or modify
 11  * it under the terms of the GNU General Public License version 2 as
 12  * published by the Free Software Foundation.
 13  *
 14  * This program is distributed in the hope that it will be useful,
 15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  * GNU General Public License for more details.
 18  *
 19  * For now:
 20  *  - Only I2C is support. Not SPI
 21  *  - master mode *NOT* supported
 22  */
 23 
 24 #include <linux/module.h>
 25 #include <linux/slab.h>
 26 #include <sound/core.h>
 27 #include <sound/soc.h>
 28 #include <sound/tlv.h>
 29 #include <sound/initval.h>
 30 #include <sound/pcm_params.h>
 31 #include <sound/pcm.h>
 32 #include <linux/regmap.h>
 33 
 34 #include "cs42l51.h"
 35 
 36 enum master_slave_mode {
 37         MODE_SLAVE,
 38         MODE_SLAVE_AUTO,
 39         MODE_MASTER,
 40 };
 41 
 42 struct cs42l51_private {
 43         unsigned int mclk;
 44         unsigned int audio_mode;        /* The mode (I2S or left-justified) */
 45         enum master_slave_mode func;
 46 };
 47 
 48 #define CS42L51_FORMATS ( \
 49                 SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
 50                 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
 51                 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
 52                 SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE)
 53 
 54 static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
 55                         struct snd_ctl_elem_value *ucontrol)
 56 {
 57         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 58         unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
 59 
 60         switch (value) {
 61         default:
 62         case 0:
 63                 ucontrol->value.enumerated.item[0] = 0;
 64                 break;
 65         /* same value : (L+R)/2 and (R+L)/2 */
 66         case 1:
 67         case 2:
 68                 ucontrol->value.enumerated.item[0] = 1;
 69                 break;
 70         case 3:
 71                 ucontrol->value.enumerated.item[0] = 2;
 72                 break;
 73         }
 74 
 75         return 0;
 76 }
 77 
 78 #define CHAN_MIX_NORMAL 0x00
 79 #define CHAN_MIX_BOTH   0x55
 80 #define CHAN_MIX_SWAP   0xFF
 81 
 82 static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
 83                         struct snd_ctl_elem_value *ucontrol)
 84 {
 85         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 86         unsigned char val;
 87 
 88         switch (ucontrol->value.enumerated.item[0]) {
 89         default:
 90         case 0:
 91                 val = CHAN_MIX_NORMAL;
 92                 break;
 93         case 1:
 94                 val = CHAN_MIX_BOTH;
 95                 break;
 96         case 2:
 97                 val = CHAN_MIX_SWAP;
 98                 break;
 99         }
100 
101         snd_soc_write(codec, CS42L51_PCM_MIXER, val);
102 
103         return 1;
104 }
105 
106 static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
107 static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
108 
109 static const DECLARE_TLV_DB_SCALE(aout_tlv, -10200, 50, 0);
110 
111 static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
112 static const char *chan_mix[] = {
113         "L R",
114         "L+R",
115         "R L",
116 };
117 
118 static SOC_ENUM_SINGLE_EXT_DECL(cs42l51_chan_mix, chan_mix);
119 
120 static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
121         SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
122                         CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
123                         0, 0x19, 0x7F, adc_pcm_tlv),
124         SOC_DOUBLE_R("PCM Playback Switch",
125                         CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
126         SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
127                         CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
128                         0, 0x34, 0xE4, aout_tlv),
129         SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
130                         CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
131                         0, 0x19, 0x7F, adc_pcm_tlv),
132         SOC_DOUBLE_R("ADC Mixer Switch",
133                         CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
134         SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
135         SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
136         SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
137         SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
138         SOC_DOUBLE_TLV("Mic Boost Volume",
139                         CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
140         SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
141         SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
142         SOC_ENUM_EXT("PCM channel mixer",
143                         cs42l51_chan_mix,
144                         cs42l51_get_chan_mix, cs42l51_set_chan_mix),
145 };
146 
147 /*
148  * to power down, one must:
149  * 1.) Enable the PDN bit
150  * 2.) enable power-down for the select channels
151  * 3.) disable the PDN bit.
152  */
153 static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
154                 struct snd_kcontrol *kcontrol, int event)
155 {
156         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
157 
158         switch (event) {
159         case SND_SOC_DAPM_PRE_PMD:
160                 snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
161                                     CS42L51_POWER_CTL1_PDN,
162                                     CS42L51_POWER_CTL1_PDN);
163                 break;
164         default:
165         case SND_SOC_DAPM_POST_PMD:
166                 snd_soc_update_bits(codec, CS42L51_POWER_CTL1,
167                                     CS42L51_POWER_CTL1_PDN, 0);
168                 break;
169         }
170 
171         return 0;
172 }
173 
174 static const char *cs42l51_dac_names[] = {"Direct PCM",
175         "DSP PCM", "ADC"};
176 static SOC_ENUM_SINGLE_DECL(cs42l51_dac_mux_enum,
177                             CS42L51_DAC_CTL, 6, cs42l51_dac_names);
178 static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
179         SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
180 
181 static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
182         "MIC Left", "MIC+preamp Left"};
183 static SOC_ENUM_SINGLE_DECL(cs42l51_adcl_mux_enum,
184                             CS42L51_ADC_INPUT, 4, cs42l51_adcl_names);
185 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
186         SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
187 
188 static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
189         "MIC Right", "MIC+preamp Right"};
190 static SOC_ENUM_SINGLE_DECL(cs42l51_adcr_mux_enum,
191                             CS42L51_ADC_INPUT, 6, cs42l51_adcr_names);
192 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
193         SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
194 
195 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
196         SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
197         SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
198                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
199         SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
200                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
201         SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
202                 CS42L51_POWER_CTL1, 1, 1,
203                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
204         SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
205                 CS42L51_POWER_CTL1, 2, 1,
206                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
207         SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
208                 CS42L51_POWER_CTL1, 5, 1,
209                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
210         SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
211                 CS42L51_POWER_CTL1, 6, 1,
212                 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
213 
214         /* analog/mic */
215         SND_SOC_DAPM_INPUT("AIN1L"),
216         SND_SOC_DAPM_INPUT("AIN1R"),
217         SND_SOC_DAPM_INPUT("AIN2L"),
218         SND_SOC_DAPM_INPUT("AIN2R"),
219         SND_SOC_DAPM_INPUT("MICL"),
220         SND_SOC_DAPM_INPUT("MICR"),
221 
222         SND_SOC_DAPM_MIXER("Mic Preamp Left",
223                 CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
224         SND_SOC_DAPM_MIXER("Mic Preamp Right",
225                 CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
226 
227         /* HP */
228         SND_SOC_DAPM_OUTPUT("HPL"),
229         SND_SOC_DAPM_OUTPUT("HPR"),
230 
231         /* mux */
232         SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
233                 &cs42l51_dac_mux_controls),
234         SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
235                 &cs42l51_adcl_mux_controls),
236         SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
237                 &cs42l51_adcr_mux_controls),
238 };
239 
240 static const struct snd_soc_dapm_route cs42l51_routes[] = {
241         {"HPL", NULL, "Left DAC"},
242         {"HPR", NULL, "Right DAC"},
243 
244         {"Left ADC", NULL, "Left PGA"},
245         {"Right ADC", NULL, "Right PGA"},
246 
247         {"Mic Preamp Left",  NULL,  "MICL"},
248         {"Mic Preamp Right", NULL,  "MICR"},
249 
250         {"PGA-ADC Mux Left",  "AIN1 Left",        "AIN1L" },
251         {"PGA-ADC Mux Left",  "AIN2 Left",        "AIN2L" },
252         {"PGA-ADC Mux Left",  "MIC Left",         "MICL"  },
253         {"PGA-ADC Mux Left",  "MIC+preamp Left",  "Mic Preamp Left" },
254         {"PGA-ADC Mux Right", "AIN1 Right",       "AIN1R" },
255         {"PGA-ADC Mux Right", "AIN2 Right",       "AIN2R" },
256         {"PGA-ADC Mux Right", "MIC Right",        "MICR" },
257         {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
258 
259         {"Left PGA", NULL, "PGA-ADC Mux Left"},
260         {"Right PGA", NULL, "PGA-ADC Mux Right"},
261 };
262 
263 static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
264                 unsigned int format)
265 {
266         struct snd_soc_codec *codec = codec_dai->codec;
267         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
268 
269         switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
270         case SND_SOC_DAIFMT_I2S:
271         case SND_SOC_DAIFMT_LEFT_J:
272         case SND_SOC_DAIFMT_RIGHT_J:
273                 cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
274                 break;
275         default:
276                 dev_err(codec->dev, "invalid DAI format\n");
277                 return -EINVAL;
278         }
279 
280         switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
281         case SND_SOC_DAIFMT_CBM_CFM:
282                 cs42l51->func = MODE_MASTER;
283                 break;
284         case SND_SOC_DAIFMT_CBS_CFS:
285                 cs42l51->func = MODE_SLAVE_AUTO;
286                 break;
287         default:
288                 dev_err(codec->dev, "Unknown master/slave configuration\n");
289                 return -EINVAL;
290         }
291 
292         return 0;
293 }
294 
295 struct cs42l51_ratios {
296         unsigned int ratio;
297         unsigned char speed_mode;
298         unsigned char mclk;
299 };
300 
301 static struct cs42l51_ratios slave_ratios[] = {
302         {  512, CS42L51_QSM_MODE, 0 }, {  768, CS42L51_QSM_MODE, 0 },
303         { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
304         { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
305         {  256, CS42L51_HSM_MODE, 0 }, {  384, CS42L51_HSM_MODE, 0 },
306         {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
307         { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
308         {  128, CS42L51_SSM_MODE, 0 }, {  192, CS42L51_SSM_MODE, 0 },
309         {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
310         {  512, CS42L51_SSM_MODE, 0 }, {  768, CS42L51_SSM_MODE, 0 },
311         {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
312         {  256, CS42L51_DSM_MODE, 0 }, {  384, CS42L51_DSM_MODE, 0 },
313 };
314 
315 static struct cs42l51_ratios slave_auto_ratios[] = {
316         { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
317         { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
318         {  512, CS42L51_HSM_MODE, 0 }, {  768, CS42L51_HSM_MODE, 0 },
319         { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
320         {  256, CS42L51_SSM_MODE, 0 }, {  384, CS42L51_SSM_MODE, 0 },
321         {  512, CS42L51_SSM_MODE, 1 }, {  768, CS42L51_SSM_MODE, 1 },
322         {  128, CS42L51_DSM_MODE, 0 }, {  192, CS42L51_DSM_MODE, 0 },
323         {  256, CS42L51_DSM_MODE, 1 }, {  384, CS42L51_DSM_MODE, 1 },
324 };
325 
326 static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
327                 int clk_id, unsigned int freq, int dir)
328 {
329         struct snd_soc_codec *codec = codec_dai->codec;
330         struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
331 
332         cs42l51->mclk = freq;
333         return 0;
334 }
335 
336 static int cs42l51_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 cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
342         int ret;
343         unsigned int i;
344         unsigned int rate;
345         unsigned int ratio;
346         struct cs42l51_ratios *ratios = NULL;
347         int nr_ratios = 0;
348         int intf_ctl, power_ctl, fmt;
349 
350         switch (cs42l51->func) {
351         case MODE_MASTER:
352                 return -EINVAL;
353         case MODE_SLAVE:
354                 ratios = slave_ratios;
355                 nr_ratios = ARRAY_SIZE(slave_ratios);
356                 break;
357         case MODE_SLAVE_AUTO:
358                 ratios = slave_auto_ratios;
359                 nr_ratios = ARRAY_SIZE(slave_auto_ratios);
360                 break;
361         }
362 
363         /* Figure out which MCLK/LRCK ratio to use */
364         rate = params_rate(params);     /* Sampling rate, in Hz */
365         ratio = cs42l51->mclk / rate;    /* MCLK/LRCK ratio */
366         for (i = 0; i < nr_ratios; i++) {
367                 if (ratios[i].ratio == ratio)
368                         break;
369         }
370 
371         if (i == nr_ratios) {
372                 /* We did not find a matching ratio */
373                 dev_err(codec->dev, "could not find matching ratio\n");
374                 return -EINVAL;
375         }
376 
377         intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
378         power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
379 
380         intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
381                         | CS42L51_INTF_CTL_DAC_FORMAT(7));
382         power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
383                         | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
384 
385         switch (cs42l51->func) {
386         case MODE_MASTER:
387                 intf_ctl |= CS42L51_INTF_CTL_MASTER;
388                 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
389                 break;
390         case MODE_SLAVE:
391                 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
392                 break;
393         case MODE_SLAVE_AUTO:
394                 power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
395                 break;
396         }
397 
398         switch (cs42l51->audio_mode) {
399         case SND_SOC_DAIFMT_I2S:
400                 intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
401                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
402                 break;
403         case SND_SOC_DAIFMT_LEFT_J:
404                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
405                 break;
406         case SND_SOC_DAIFMT_RIGHT_J:
407                 switch (params_width(params)) {
408                 case 16:
409                         fmt = CS42L51_DAC_DIF_RJ16;
410                         break;
411                 case 18:
412                         fmt = CS42L51_DAC_DIF_RJ18;
413                         break;
414                 case 20:
415                         fmt = CS42L51_DAC_DIF_RJ20;
416                         break;
417                 case 24:
418                         fmt = CS42L51_DAC_DIF_RJ24;
419                         break;
420                 default:
421                         dev_err(codec->dev, "unknown format\n");
422                         return -EINVAL;
423                 }
424                 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
425                 break;
426         default:
427                 dev_err(codec->dev, "unknown format\n");
428                 return -EINVAL;
429         }
430 
431         if (ratios[i].mclk)
432                 power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
433 
434         ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
435         if (ret < 0)
436                 return ret;
437 
438         ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
439         if (ret < 0)
440                 return ret;
441 
442         return 0;
443 }
444 
445 static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
446 {
447         struct snd_soc_codec *codec = dai->codec;
448         int reg;
449         int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
450 
451         reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
452 
453         if (mute)
454                 reg |= mask;
455         else
456                 reg &= ~mask;
457 
458         return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
459 }
460 
461 static const struct snd_soc_dai_ops cs42l51_dai_ops = {
462         .hw_params      = cs42l51_hw_params,
463         .set_sysclk     = cs42l51_set_dai_sysclk,
464         .set_fmt        = cs42l51_set_dai_fmt,
465         .digital_mute   = cs42l51_dai_mute,
466 };
467 
468 static struct snd_soc_dai_driver cs42l51_dai = {
469         .name = "cs42l51-hifi",
470         .playback = {
471                 .stream_name = "Playback",
472                 .channels_min = 1,
473                 .channels_max = 2,
474                 .rates = SNDRV_PCM_RATE_8000_96000,
475                 .formats = CS42L51_FORMATS,
476         },
477         .capture = {
478                 .stream_name = "Capture",
479                 .channels_min = 1,
480                 .channels_max = 2,
481                 .rates = SNDRV_PCM_RATE_8000_96000,
482                 .formats = CS42L51_FORMATS,
483         },
484         .ops = &cs42l51_dai_ops,
485 };
486 
487 static int cs42l51_codec_probe(struct snd_soc_codec *codec)
488 {
489         int ret, reg;
490 
491         /*
492          * DAC configuration
493          * - Use signal processor
494          * - auto mute
495          * - vol changes immediate
496          * - no de-emphasize
497          */
498         reg = CS42L51_DAC_CTL_DATA_SEL(1)
499                 | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
500         ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
501         if (ret < 0)
502                 return ret;
503 
504         return 0;
505 }
506 
507 static const struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
508         .probe = cs42l51_codec_probe,
509 
510         .component_driver = {
511                 .controls               = cs42l51_snd_controls,
512                 .num_controls           = ARRAY_SIZE(cs42l51_snd_controls),
513                 .dapm_widgets           = cs42l51_dapm_widgets,
514                 .num_dapm_widgets       = ARRAY_SIZE(cs42l51_dapm_widgets),
515                 .dapm_routes            = cs42l51_routes,
516                 .num_dapm_routes        = ARRAY_SIZE(cs42l51_routes),
517         },
518 };
519 
520 const struct regmap_config cs42l51_regmap = {
521         .max_register = CS42L51_CHARGE_FREQ,
522         .cache_type = REGCACHE_RBTREE,
523 };
524 EXPORT_SYMBOL_GPL(cs42l51_regmap);
525 
526 int cs42l51_probe(struct device *dev, struct regmap *regmap)
527 {
528         struct cs42l51_private *cs42l51;
529         unsigned int val;
530         int ret;
531 
532         if (IS_ERR(regmap))
533                 return PTR_ERR(regmap);
534 
535         cs42l51 = devm_kzalloc(dev, sizeof(struct cs42l51_private),
536                                GFP_KERNEL);
537         if (!cs42l51)
538                 return -ENOMEM;
539 
540         dev_set_drvdata(dev, cs42l51);
541 
542         /* Verify that we have a CS42L51 */
543         ret = regmap_read(regmap, CS42L51_CHIP_REV_ID, &val);
544         if (ret < 0) {
545                 dev_err(dev, "failed to read I2C\n");
546                 goto error;
547         }
548 
549         if ((val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
550             (val != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
551                 dev_err(dev, "Invalid chip id: %x\n", val);
552                 ret = -ENODEV;
553                 goto error;
554         }
555         dev_info(dev, "Cirrus Logic CS42L51, Revision: %02X\n",
556                  val & CS42L51_CHIP_REV_MASK);
557 
558         ret =  snd_soc_register_codec(dev,
559                         &soc_codec_device_cs42l51, &cs42l51_dai, 1);
560 error:
561         return ret;
562 }
563 EXPORT_SYMBOL_GPL(cs42l51_probe);
564 
565 const struct of_device_id cs42l51_of_match[] = {
566         { .compatible = "cirrus,cs42l51", },
567         { }
568 };
569 MODULE_DEVICE_TABLE(of, cs42l51_of_match);
570 EXPORT_SYMBOL_GPL(cs42l51_of_match);
571 
572 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
573 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
574 MODULE_LICENSE("GPL");
575 

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