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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/es8316.c

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  1 /*
  2  * es8316.c -- es8316 ALSA SoC audio driver
  3  * Copyright Everest Semiconductor Co.,Ltd
  4  *
  5  * Authors: David Yang <yangxiaohua@everest-semi.com>,
  6  *          Daniel Drake <drake@endlessm.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/acpi.h>
 15 #include <linux/delay.h>
 16 #include <linux/i2c.h>
 17 #include <linux/mod_devicetable.h>
 18 #include <linux/regmap.h>
 19 #include <sound/pcm.h>
 20 #include <sound/pcm_params.h>
 21 #include <sound/soc.h>
 22 #include <sound/soc-dapm.h>
 23 #include <sound/tlv.h>
 24 #include "es8316.h"
 25 
 26 /* In slave mode at single speed, the codec is documented as accepting 5
 27  * MCLK/LRCK ratios, but we also add ratio 400, which is commonly used on
 28  * Intel Cherry Trail platforms (19.2MHz MCLK, 48kHz LRCK).
 29  */
 30 #define NR_SUPPORTED_MCLK_LRCK_RATIOS 6
 31 static const unsigned int supported_mclk_lrck_ratios[] = {
 32         256, 384, 400, 512, 768, 1024
 33 };
 34 
 35 struct es8316_priv {
 36         unsigned int sysclk;
 37         unsigned int allowed_rates[NR_SUPPORTED_MCLK_LRCK_RATIOS];
 38         struct snd_pcm_hw_constraint_list sysclk_constraints;
 39 };
 40 
 41 /*
 42  * ES8316 controls
 43  */
 44 static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(dac_vol_tlv, -9600, 50, 1);
 45 static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(adc_vol_tlv, -9600, 50, 1);
 46 static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(alc_max_gain_tlv, -650, 150, 0);
 47 static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(alc_min_gain_tlv, -1200, 150, 0);
 48 static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(alc_target_tlv, -1650, 150, 0);
 49 static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(hpmixer_gain_tlv, -1200, 150, 0);
 50 
 51 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(adc_pga_gain_tlv,
 52         0, 0, TLV_DB_SCALE_ITEM(-350, 0, 0),
 53         1, 1, TLV_DB_SCALE_ITEM(0, 0, 0),
 54         2, 2, TLV_DB_SCALE_ITEM(250, 0, 0),
 55         3, 3, TLV_DB_SCALE_ITEM(450, 0, 0),
 56         4, 4, TLV_DB_SCALE_ITEM(700, 0, 0),
 57         5, 5, TLV_DB_SCALE_ITEM(1000, 0, 0),
 58         6, 6, TLV_DB_SCALE_ITEM(1300, 0, 0),
 59         7, 7, TLV_DB_SCALE_ITEM(1600, 0, 0),
 60         8, 8, TLV_DB_SCALE_ITEM(1800, 0, 0),
 61         9, 9, TLV_DB_SCALE_ITEM(2100, 0, 0),
 62         10, 10, TLV_DB_SCALE_ITEM(2400, 0, 0),
 63 );
 64 
 65 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(hpout_vol_tlv,
 66         0, 0, TLV_DB_SCALE_ITEM(-4800, 0, 0),
 67         1, 3, TLV_DB_SCALE_ITEM(-2400, 1200, 0),
 68 );
 69 
 70 static const char * const ng_type_txt[] =
 71         { "Constant PGA Gain", "Mute ADC Output" };
 72 static const struct soc_enum ng_type =
 73         SOC_ENUM_SINGLE(ES8316_ADC_ALC_NG, 6, 2, ng_type_txt);
 74 
 75 static const char * const adcpol_txt[] = { "Normal", "Invert" };
 76 static const struct soc_enum adcpol =
 77         SOC_ENUM_SINGLE(ES8316_ADC_MUTE, 1, 2, adcpol_txt);
 78 static const char *const dacpol_txt[] =
 79         { "Normal", "R Invert", "L Invert", "L + R Invert" };
 80 static const struct soc_enum dacpol =
 81         SOC_ENUM_SINGLE(ES8316_DAC_SET1, 0, 4, dacpol_txt);
 82 
 83 static const struct snd_kcontrol_new es8316_snd_controls[] = {
 84         SOC_DOUBLE_TLV("Headphone Playback Volume", ES8316_CPHP_ICAL_VOL,
 85                        4, 0, 3, 1, hpout_vol_tlv),
 86         SOC_DOUBLE_TLV("Headphone Mixer Volume", ES8316_HPMIX_VOL,
 87                        0, 4, 7, 0, hpmixer_gain_tlv),
 88 
 89         SOC_ENUM("Playback Polarity", dacpol),
 90         SOC_DOUBLE_R_TLV("DAC Playback Volume", ES8316_DAC_VOLL,
 91                          ES8316_DAC_VOLR, 0, 0xc0, 1, dac_vol_tlv),
 92         SOC_SINGLE("DAC Soft Ramp Switch", ES8316_DAC_SET1, 4, 1, 1),
 93         SOC_SINGLE("DAC Soft Ramp Rate", ES8316_DAC_SET1, 2, 4, 0),
 94         SOC_SINGLE("DAC Notch Filter Switch", ES8316_DAC_SET2, 6, 1, 0),
 95         SOC_SINGLE("DAC Double Fs Switch", ES8316_DAC_SET2, 7, 1, 0),
 96         SOC_SINGLE("DAC Stereo Enhancement", ES8316_DAC_SET3, 0, 7, 0),
 97 
 98         SOC_ENUM("Capture Polarity", adcpol),
 99         SOC_SINGLE("Mic Boost Switch", ES8316_ADC_D2SEPGA, 0, 1, 0),
100         SOC_SINGLE_TLV("ADC Capture Volume", ES8316_ADC_VOLUME,
101                        0, 0xc0, 1, adc_vol_tlv),
102         SOC_SINGLE_TLV("ADC PGA Gain Volume", ES8316_ADC_PGAGAIN,
103                        4, 10, 0, adc_pga_gain_tlv),
104         SOC_SINGLE("ADC Soft Ramp Switch", ES8316_ADC_MUTE, 4, 1, 0),
105         SOC_SINGLE("ADC Double Fs Switch", ES8316_ADC_DMIC, 4, 1, 0),
106 
107         SOC_SINGLE("ALC Capture Switch", ES8316_ADC_ALC1, 6, 1, 0),
108         SOC_SINGLE_TLV("ALC Capture Max Volume", ES8316_ADC_ALC1, 0, 28, 0,
109                        alc_max_gain_tlv),
110         SOC_SINGLE_TLV("ALC Capture Min Volume", ES8316_ADC_ALC2, 0, 28, 0,
111                        alc_min_gain_tlv),
112         SOC_SINGLE_TLV("ALC Capture Target Volume", ES8316_ADC_ALC3, 4, 10, 0,
113                        alc_target_tlv),
114         SOC_SINGLE("ALC Capture Hold Time", ES8316_ADC_ALC3, 0, 10, 0),
115         SOC_SINGLE("ALC Capture Decay Time", ES8316_ADC_ALC4, 4, 10, 0),
116         SOC_SINGLE("ALC Capture Attack Time", ES8316_ADC_ALC4, 0, 10, 0),
117         SOC_SINGLE("ALC Capture Noise Gate Switch", ES8316_ADC_ALC_NG,
118                    5, 1, 0),
119         SOC_SINGLE("ALC Capture Noise Gate Threshold", ES8316_ADC_ALC_NG,
120                    0, 31, 0),
121         SOC_ENUM("ALC Capture Noise Gate Type", ng_type),
122 };
123 
124 /* Analog Input Mux */
125 static const char * const es8316_analog_in_txt[] = {
126                 "lin1-rin1",
127                 "lin2-rin2",
128                 "lin1-rin1 with 20db Boost",
129                 "lin2-rin2 with 20db Boost"
130 };
131 static const unsigned int es8316_analog_in_values[] = { 0, 1, 2, 3 };
132 static const struct soc_enum es8316_analog_input_enum =
133         SOC_VALUE_ENUM_SINGLE(ES8316_ADC_PDN_LINSEL, 4, 3,
134                               ARRAY_SIZE(es8316_analog_in_txt),
135                               es8316_analog_in_txt,
136                               es8316_analog_in_values);
137 static const struct snd_kcontrol_new es8316_analog_in_mux_controls =
138         SOC_DAPM_ENUM("Route", es8316_analog_input_enum);
139 
140 static const char * const es8316_dmic_txt[] = {
141                 "dmic disable",
142                 "dmic data at high level",
143                 "dmic data at low level",
144 };
145 static const unsigned int es8316_dmic_values[] = { 0, 1, 2 };
146 static const struct soc_enum es8316_dmic_src_enum =
147         SOC_VALUE_ENUM_SINGLE(ES8316_ADC_DMIC, 0, 3,
148                               ARRAY_SIZE(es8316_dmic_txt),
149                               es8316_dmic_txt,
150                               es8316_dmic_values);
151 static const struct snd_kcontrol_new es8316_dmic_src_controls =
152         SOC_DAPM_ENUM("Route", es8316_dmic_src_enum);
153 
154 /* hp mixer mux */
155 static const char * const es8316_hpmux_texts[] = {
156         "lin1-rin1",
157         "lin2-rin2",
158         "lin-rin with Boost",
159         "lin-rin with Boost and PGA"
160 };
161 
162 static const unsigned int es8316_hpmux_values[] = { 0, 1, 2, 3 };
163 
164 static SOC_ENUM_SINGLE_DECL(es8316_left_hpmux_enum, ES8316_HPMIX_SEL,
165         4, es8316_hpmux_texts);
166 
167 static const struct snd_kcontrol_new es8316_left_hpmux_controls =
168         SOC_DAPM_ENUM("Route", es8316_left_hpmux_enum);
169 
170 static SOC_ENUM_SINGLE_DECL(es8316_right_hpmux_enum, ES8316_HPMIX_SEL,
171         0, es8316_hpmux_texts);
172 
173 static const struct snd_kcontrol_new es8316_right_hpmux_controls =
174         SOC_DAPM_ENUM("Route", es8316_right_hpmux_enum);
175 
176 /* headphone Output Mixer */
177 static const struct snd_kcontrol_new es8316_out_left_mix[] = {
178         SOC_DAPM_SINGLE("LLIN Switch", ES8316_HPMIX_SWITCH, 6, 1, 0),
179         SOC_DAPM_SINGLE("Left DAC Switch", ES8316_HPMIX_SWITCH, 7, 1, 0),
180 };
181 static const struct snd_kcontrol_new es8316_out_right_mix[] = {
182         SOC_DAPM_SINGLE("RLIN Switch", ES8316_HPMIX_SWITCH, 2, 1, 0),
183         SOC_DAPM_SINGLE("Right DAC Switch", ES8316_HPMIX_SWITCH, 3, 1, 0),
184 };
185 
186 /* DAC data source mux */
187 static const char * const es8316_dacsrc_texts[] = {
188         "LDATA TO LDAC, RDATA TO RDAC",
189         "LDATA TO LDAC, LDATA TO RDAC",
190         "RDATA TO LDAC, RDATA TO RDAC",
191         "RDATA TO LDAC, LDATA TO RDAC",
192 };
193 
194 static const unsigned int es8316_dacsrc_values[] = { 0, 1, 2, 3 };
195 
196 static SOC_ENUM_SINGLE_DECL(es8316_dacsrc_mux_enum, ES8316_DAC_SET1,
197         6, es8316_dacsrc_texts);
198 
199 static const struct snd_kcontrol_new es8316_dacsrc_mux_controls =
200         SOC_DAPM_ENUM("Route", es8316_dacsrc_mux_enum);
201 
202 static const struct snd_soc_dapm_widget es8316_dapm_widgets[] = {
203         SND_SOC_DAPM_SUPPLY("Bias", ES8316_SYS_PDN, 3, 1, NULL, 0),
204         SND_SOC_DAPM_SUPPLY("Analog power", ES8316_SYS_PDN, 4, 1, NULL, 0),
205         SND_SOC_DAPM_SUPPLY("Mic Bias", ES8316_SYS_PDN, 5, 1, NULL, 0),
206 
207         SND_SOC_DAPM_INPUT("DMIC"),
208         SND_SOC_DAPM_INPUT("MIC1"),
209         SND_SOC_DAPM_INPUT("MIC2"),
210 
211         /* Input Mux */
212         SND_SOC_DAPM_MUX("Differential Mux", SND_SOC_NOPM, 0, 0,
213                          &es8316_analog_in_mux_controls),
214 
215         SND_SOC_DAPM_SUPPLY("ADC Vref", ES8316_SYS_PDN, 1, 1, NULL, 0),
216         SND_SOC_DAPM_SUPPLY("ADC bias", ES8316_SYS_PDN, 2, 1, NULL, 0),
217         SND_SOC_DAPM_SUPPLY("ADC Clock", ES8316_CLKMGR_CLKSW, 3, 0, NULL, 0),
218         SND_SOC_DAPM_PGA("Line input PGA", ES8316_ADC_PDN_LINSEL,
219                          7, 1, NULL, 0),
220         SND_SOC_DAPM_ADC("Mono ADC", NULL, ES8316_ADC_PDN_LINSEL, 6, 1),
221         SND_SOC_DAPM_MUX("Digital Mic Mux", SND_SOC_NOPM, 0, 0,
222                          &es8316_dmic_src_controls),
223 
224         /* Digital Interface */
225         SND_SOC_DAPM_AIF_OUT("I2S OUT", "I2S1 Capture",  1,
226                              ES8316_SERDATA_ADC, 6, 1),
227         SND_SOC_DAPM_AIF_IN("I2S IN", "I2S1 Playback", 0,
228                             SND_SOC_NOPM, 0, 0),
229 
230         SND_SOC_DAPM_MUX("DAC Source Mux", SND_SOC_NOPM, 0, 0,
231                          &es8316_dacsrc_mux_controls),
232 
233         SND_SOC_DAPM_SUPPLY("DAC Vref", ES8316_SYS_PDN, 0, 1, NULL, 0),
234         SND_SOC_DAPM_SUPPLY("DAC Clock", ES8316_CLKMGR_CLKSW, 2, 0, NULL, 0),
235         SND_SOC_DAPM_DAC("Right DAC", NULL, ES8316_DAC_PDN, 0, 1),
236         SND_SOC_DAPM_DAC("Left DAC", NULL, ES8316_DAC_PDN, 4, 1),
237 
238         /* Headphone Output Side */
239         SND_SOC_DAPM_MUX("Left Headphone Mux", SND_SOC_NOPM, 0, 0,
240                          &es8316_left_hpmux_controls),
241         SND_SOC_DAPM_MUX("Right Headphone Mux", SND_SOC_NOPM, 0, 0,
242                          &es8316_right_hpmux_controls),
243         SND_SOC_DAPM_MIXER("Left Headphone Mixer", ES8316_HPMIX_PDN,
244                            5, 1, &es8316_out_left_mix[0],
245                            ARRAY_SIZE(es8316_out_left_mix)),
246         SND_SOC_DAPM_MIXER("Right Headphone Mixer", ES8316_HPMIX_PDN,
247                            1, 1, &es8316_out_right_mix[0],
248                            ARRAY_SIZE(es8316_out_right_mix)),
249         SND_SOC_DAPM_PGA("Left Headphone Mixer Out", ES8316_HPMIX_PDN,
250                          4, 1, NULL, 0),
251         SND_SOC_DAPM_PGA("Right Headphone Mixer Out", ES8316_HPMIX_PDN,
252                          0, 1, NULL, 0),
253 
254         SND_SOC_DAPM_OUT_DRV("Left Headphone Charge Pump", ES8316_CPHP_OUTEN,
255                              6, 0, NULL, 0),
256         SND_SOC_DAPM_OUT_DRV("Right Headphone Charge Pump", ES8316_CPHP_OUTEN,
257                              2, 0, NULL, 0),
258         SND_SOC_DAPM_SUPPLY("Headphone Charge Pump", ES8316_CPHP_PDN2,
259                             5, 1, NULL, 0),
260         SND_SOC_DAPM_SUPPLY("Headphone Charge Pump Clock", ES8316_CLKMGR_CLKSW,
261                             4, 0, NULL, 0),
262 
263         SND_SOC_DAPM_OUT_DRV("Left Headphone Driver", ES8316_CPHP_OUTEN,
264                              5, 0, NULL, 0),
265         SND_SOC_DAPM_OUT_DRV("Right Headphone Driver", ES8316_CPHP_OUTEN,
266                              1, 0, NULL, 0),
267         SND_SOC_DAPM_SUPPLY("Headphone Out", ES8316_CPHP_PDN1, 2, 1, NULL, 0),
268 
269         /* pdn_Lical and pdn_Rical bits are documented as Reserved, but must
270          * be explicitly unset in order to enable HP output
271          */
272         SND_SOC_DAPM_SUPPLY("Left Headphone ical", ES8316_CPHP_ICAL_VOL,
273                             7, 1, NULL, 0),
274         SND_SOC_DAPM_SUPPLY("Right Headphone ical", ES8316_CPHP_ICAL_VOL,
275                             3, 1, NULL, 0),
276 
277         SND_SOC_DAPM_OUTPUT("HPOL"),
278         SND_SOC_DAPM_OUTPUT("HPOR"),
279 };
280 
281 static const struct snd_soc_dapm_route es8316_dapm_routes[] = {
282         /* Recording */
283         {"MIC1", NULL, "Mic Bias"},
284         {"MIC2", NULL, "Mic Bias"},
285         {"MIC1", NULL, "Bias"},
286         {"MIC2", NULL, "Bias"},
287         {"MIC1", NULL, "Analog power"},
288         {"MIC2", NULL, "Analog power"},
289 
290         {"Differential Mux", "lin1-rin1", "MIC1"},
291         {"Differential Mux", "lin2-rin2", "MIC2"},
292         {"Line input PGA", NULL, "Differential Mux"},
293 
294         {"Mono ADC", NULL, "ADC Clock"},
295         {"Mono ADC", NULL, "ADC Vref"},
296         {"Mono ADC", NULL, "ADC bias"},
297         {"Mono ADC", NULL, "Line input PGA"},
298 
299         /* It's not clear why, but to avoid recording only silence,
300          * the DAC clock must be running for the ADC to work.
301          */
302         {"Mono ADC", NULL, "DAC Clock"},
303 
304         {"Digital Mic Mux", "dmic disable", "Mono ADC"},
305 
306         {"I2S OUT", NULL, "Digital Mic Mux"},
307 
308         /* Playback */
309         {"DAC Source Mux", "LDATA TO LDAC, RDATA TO RDAC", "I2S IN"},
310 
311         {"Left DAC", NULL, "DAC Clock"},
312         {"Right DAC", NULL, "DAC Clock"},
313 
314         {"Left DAC", NULL, "DAC Vref"},
315         {"Right DAC", NULL, "DAC Vref"},
316 
317         {"Left DAC", NULL, "DAC Source Mux"},
318         {"Right DAC", NULL, "DAC Source Mux"},
319 
320         {"Left Headphone Mux", "lin-rin with Boost and PGA", "Line input PGA"},
321         {"Right Headphone Mux", "lin-rin with Boost and PGA", "Line input PGA"},
322 
323         {"Left Headphone Mixer", "LLIN Switch", "Left Headphone Mux"},
324         {"Left Headphone Mixer", "Left DAC Switch", "Left DAC"},
325 
326         {"Right Headphone Mixer", "RLIN Switch", "Right Headphone Mux"},
327         {"Right Headphone Mixer", "Right DAC Switch", "Right DAC"},
328 
329         {"Left Headphone Mixer Out", NULL, "Left Headphone Mixer"},
330         {"Right Headphone Mixer Out", NULL, "Right Headphone Mixer"},
331 
332         {"Left Headphone Charge Pump", NULL, "Left Headphone Mixer Out"},
333         {"Right Headphone Charge Pump", NULL, "Right Headphone Mixer Out"},
334 
335         {"Left Headphone Charge Pump", NULL, "Headphone Charge Pump"},
336         {"Right Headphone Charge Pump", NULL, "Headphone Charge Pump"},
337 
338         {"Left Headphone Charge Pump", NULL, "Headphone Charge Pump Clock"},
339         {"Right Headphone Charge Pump", NULL, "Headphone Charge Pump Clock"},
340 
341         {"Left Headphone Driver", NULL, "Left Headphone Charge Pump"},
342         {"Right Headphone Driver", NULL, "Right Headphone Charge Pump"},
343 
344         {"HPOL", NULL, "Left Headphone Driver"},
345         {"HPOR", NULL, "Right Headphone Driver"},
346 
347         {"HPOL", NULL, "Left Headphone ical"},
348         {"HPOR", NULL, "Right Headphone ical"},
349 
350         {"Headphone Out", NULL, "Bias"},
351         {"Headphone Out", NULL, "Analog power"},
352         {"HPOL", NULL, "Headphone Out"},
353         {"HPOR", NULL, "Headphone Out"},
354 };
355 
356 static int es8316_set_dai_sysclk(struct snd_soc_dai *codec_dai,
357                                  int clk_id, unsigned int freq, int dir)
358 {
359         struct snd_soc_component *component = codec_dai->component;
360         struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
361         int i;
362         int count = 0;
363 
364         es8316->sysclk = freq;
365 
366         if (freq == 0)
367                 return 0;
368 
369         /* Limit supported sample rates to ones that can be autodetected
370          * by the codec running in slave mode.
371          */
372         for (i = 0; i < NR_SUPPORTED_MCLK_LRCK_RATIOS; i++) {
373                 const unsigned int ratio = supported_mclk_lrck_ratios[i];
374 
375                 if (freq % ratio == 0)
376                         es8316->allowed_rates[count++] = freq / ratio;
377         }
378 
379         es8316->sysclk_constraints.list = es8316->allowed_rates;
380         es8316->sysclk_constraints.count = count;
381 
382         return 0;
383 }
384 
385 static int es8316_set_dai_fmt(struct snd_soc_dai *codec_dai,
386                               unsigned int fmt)
387 {
388         struct snd_soc_component *component = codec_dai->component;
389         u8 serdata1 = 0;
390         u8 serdata2 = 0;
391         u8 clksw;
392         u8 mask;
393 
394         if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
395                 dev_err(component->dev, "Codec driver only supports slave mode\n");
396                 return -EINVAL;
397         }
398 
399         if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S) {
400                 dev_err(component->dev, "Codec driver only supports I2S format\n");
401                 return -EINVAL;
402         }
403 
404         /* Clock inversion */
405         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
406         case SND_SOC_DAIFMT_NB_NF:
407                 break;
408         case SND_SOC_DAIFMT_IB_IF:
409                 serdata1 |= ES8316_SERDATA1_BCLK_INV;
410                 serdata2 |= ES8316_SERDATA2_ADCLRP;
411                 break;
412         case SND_SOC_DAIFMT_IB_NF:
413                 serdata1 |= ES8316_SERDATA1_BCLK_INV;
414                 break;
415         case SND_SOC_DAIFMT_NB_IF:
416                 serdata2 |= ES8316_SERDATA2_ADCLRP;
417                 break;
418         default:
419                 return -EINVAL;
420         }
421 
422         mask = ES8316_SERDATA1_MASTER | ES8316_SERDATA1_BCLK_INV;
423         snd_soc_component_update_bits(component, ES8316_SERDATA1, mask, serdata1);
424 
425         mask = ES8316_SERDATA2_FMT_MASK | ES8316_SERDATA2_ADCLRP;
426         snd_soc_component_update_bits(component, ES8316_SERDATA_ADC, mask, serdata2);
427         snd_soc_component_update_bits(component, ES8316_SERDATA_DAC, mask, serdata2);
428 
429         /* Enable BCLK and MCLK inputs in slave mode */
430         clksw = ES8316_CLKMGR_CLKSW_MCLK_ON | ES8316_CLKMGR_CLKSW_BCLK_ON;
431         snd_soc_component_update_bits(component, ES8316_CLKMGR_CLKSW, clksw, clksw);
432 
433         return 0;
434 }
435 
436 static int es8316_pcm_startup(struct snd_pcm_substream *substream,
437                               struct snd_soc_dai *dai)
438 {
439         struct snd_soc_component *component = dai->component;
440         struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
441 
442         if (es8316->sysclk == 0) {
443                 dev_err(component->dev, "No sysclk provided\n");
444                 return -EINVAL;
445         }
446 
447         /* The set of sample rates that can be supported depends on the
448          * MCLK supplied to the CODEC.
449          */
450         snd_pcm_hw_constraint_list(substream->runtime, 0,
451                                    SNDRV_PCM_HW_PARAM_RATE,
452                                    &es8316->sysclk_constraints);
453 
454         return 0;
455 }
456 
457 static int es8316_pcm_hw_params(struct snd_pcm_substream *substream,
458                                 struct snd_pcm_hw_params *params,
459                                 struct snd_soc_dai *dai)
460 {
461         struct snd_soc_component *component = dai->component;
462         struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
463         u8 wordlen = 0;
464 
465         if (!es8316->sysclk) {
466                 dev_err(component->dev, "No MCLK configured\n");
467                 return -EINVAL;
468         }
469 
470         switch (params_format(params)) {
471         case SNDRV_PCM_FORMAT_S16_LE:
472                 wordlen = ES8316_SERDATA2_LEN_16;
473                 break;
474         case SNDRV_PCM_FORMAT_S20_3LE:
475                 wordlen = ES8316_SERDATA2_LEN_20;
476                 break;
477         case SNDRV_PCM_FORMAT_S24_LE:
478                 wordlen = ES8316_SERDATA2_LEN_24;
479                 break;
480         case SNDRV_PCM_FORMAT_S32_LE:
481                 wordlen = ES8316_SERDATA2_LEN_32;
482                 break;
483         default:
484                 return -EINVAL;
485         }
486 
487         snd_soc_component_update_bits(component, ES8316_SERDATA_DAC,
488                             ES8316_SERDATA2_LEN_MASK, wordlen);
489         snd_soc_component_update_bits(component, ES8316_SERDATA_ADC,
490                             ES8316_SERDATA2_LEN_MASK, wordlen);
491         return 0;
492 }
493 
494 static int es8316_mute(struct snd_soc_dai *dai, int mute)
495 {
496         snd_soc_component_update_bits(dai->component, ES8316_DAC_SET1, 0x20,
497                             mute ? 0x20 : 0);
498         return 0;
499 }
500 
501 #define ES8316_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
502                         SNDRV_PCM_FMTBIT_S24_LE)
503 
504 static const struct snd_soc_dai_ops es8316_ops = {
505         .startup = es8316_pcm_startup,
506         .hw_params = es8316_pcm_hw_params,
507         .set_fmt = es8316_set_dai_fmt,
508         .set_sysclk = es8316_set_dai_sysclk,
509         .digital_mute = es8316_mute,
510 };
511 
512 static struct snd_soc_dai_driver es8316_dai = {
513         .name = "ES8316 HiFi",
514         .playback = {
515                 .stream_name = "Playback",
516                 .channels_min = 1,
517                 .channels_max = 2,
518                 .rates = SNDRV_PCM_RATE_8000_48000,
519                 .formats = ES8316_FORMATS,
520         },
521         .capture = {
522                 .stream_name = "Capture",
523                 .channels_min = 1,
524                 .channels_max = 2,
525                 .rates = SNDRV_PCM_RATE_8000_48000,
526                 .formats = ES8316_FORMATS,
527         },
528         .ops = &es8316_ops,
529         .symmetric_rates = 1,
530 };
531 
532 static int es8316_probe(struct snd_soc_component *component)
533 {
534         /* Reset codec and enable current state machine */
535         snd_soc_component_write(component, ES8316_RESET, 0x3f);
536         usleep_range(5000, 5500);
537         snd_soc_component_write(component, ES8316_RESET, ES8316_RESET_CSM_ON);
538         msleep(30);
539 
540         /*
541          * Documentation is unclear, but this value from the vendor driver is
542          * needed otherwise audio output is silent.
543          */
544         snd_soc_component_write(component, ES8316_SYS_VMIDSEL, 0xff);
545 
546         /*
547          * Documentation for this register is unclear and incomplete,
548          * but here is a vendor-provided value that improves volume
549          * and quality for Intel CHT platforms.
550          */
551         snd_soc_component_write(component, ES8316_CLKMGR_ADCOSR, 0x32);
552 
553         return 0;
554 }
555 
556 static const struct snd_soc_component_driver soc_component_dev_es8316 = {
557         .probe                  = es8316_probe,
558         .controls               = es8316_snd_controls,
559         .num_controls           = ARRAY_SIZE(es8316_snd_controls),
560         .dapm_widgets           = es8316_dapm_widgets,
561         .num_dapm_widgets       = ARRAY_SIZE(es8316_dapm_widgets),
562         .dapm_routes            = es8316_dapm_routes,
563         .num_dapm_routes        = ARRAY_SIZE(es8316_dapm_routes),
564         .use_pmdown_time        = 1,
565         .endianness             = 1,
566         .non_legacy_dai_naming  = 1,
567 };
568 
569 static const struct regmap_config es8316_regmap = {
570         .reg_bits = 8,
571         .val_bits = 8,
572         .max_register = 0x53,
573         .cache_type = REGCACHE_RBTREE,
574 };
575 
576 static int es8316_i2c_probe(struct i2c_client *i2c_client,
577                             const struct i2c_device_id *id)
578 {
579         struct es8316_priv *es8316;
580         struct regmap *regmap;
581 
582         es8316 = devm_kzalloc(&i2c_client->dev, sizeof(struct es8316_priv),
583                               GFP_KERNEL);
584         if (es8316 == NULL)
585                 return -ENOMEM;
586 
587         i2c_set_clientdata(i2c_client, es8316);
588 
589         regmap = devm_regmap_init_i2c(i2c_client, &es8316_regmap);
590         if (IS_ERR(regmap))
591                 return PTR_ERR(regmap);
592 
593         return devm_snd_soc_register_component(&i2c_client->dev,
594                                       &soc_component_dev_es8316,
595                                       &es8316_dai, 1);
596 }
597 
598 static const struct i2c_device_id es8316_i2c_id[] = {
599         {"es8316", 0 },
600         {}
601 };
602 MODULE_DEVICE_TABLE(i2c, es8316_i2c_id);
603 
604 static const struct of_device_id es8316_of_match[] = {
605         { .compatible = "everest,es8316", },
606         {},
607 };
608 MODULE_DEVICE_TABLE(of, es8316_of_match);
609 
610 static const struct acpi_device_id es8316_acpi_match[] = {
611         {"ESSX8316", 0},
612         {},
613 };
614 MODULE_DEVICE_TABLE(acpi, es8316_acpi_match);
615 
616 static struct i2c_driver es8316_i2c_driver = {
617         .driver = {
618                 .name                   = "es8316",
619                 .acpi_match_table       = ACPI_PTR(es8316_acpi_match),
620                 .of_match_table         = of_match_ptr(es8316_of_match),
621         },
622         .probe          = es8316_i2c_probe,
623         .id_table       = es8316_i2c_id,
624 };
625 module_i2c_driver(es8316_i2c_driver);
626 
627 MODULE_DESCRIPTION("Everest Semi ES8316 ALSA SoC Codec Driver");
628 MODULE_AUTHOR("David Yang <yangxiaohua@everest-semi.com>");
629 MODULE_LICENSE("GPL v2");
630 

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