summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/es8316.c
blob: ecc02449c569bd479d728aa929fc9093bf0a9fae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
/*
 * es8316.c -- es8316 ALSA SoC audio driver
 * Copyright Everest Semiconductor Co.,Ltd
 *
 * Authors: David Yang <yangxiaohua@everest-semi.com>,
 *          Daniel Drake <drake@endlessm.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/regmap.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>
#include "es8316.h"

/* In slave mode at single speed, the codec is documented as accepting 5
 * MCLK/LRCK ratios, but we also add ratio 400, which is commonly used on
 * Intel Cherry Trail platforms (19.2MHz MCLK, 48kHz LRCK).
 */
#define NR_SUPPORTED_MCLK_LRCK_RATIOS 6
static const unsigned int supported_mclk_lrck_ratios[] = {
	256, 384, 400, 512, 768, 1024
};

struct es8316_priv {
	unsigned int sysclk;
	unsigned int allowed_rates[NR_SUPPORTED_MCLK_LRCK_RATIOS];
	struct snd_pcm_hw_constraint_list sysclk_constraints;
};

/*
 * ES8316 controls
 */
static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(dac_vol_tlv, -9600, 50, 1);
static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(adc_vol_tlv, -9600, 50, 1);
static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(alc_max_gain_tlv, -650, 150, 0);
static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(alc_min_gain_tlv, -1200, 150, 0);
static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(alc_target_tlv, -1650, 150, 0);
static const SNDRV_CTL_TLVD_DECLARE_DB_SCALE(hpmixer_gain_tlv, -1200, 150, 0);

static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(adc_pga_gain_tlv,
	0, 0, TLV_DB_SCALE_ITEM(-350, 0, 0),
	1, 1, TLV_DB_SCALE_ITEM(0, 0, 0),
	2, 2, TLV_DB_SCALE_ITEM(250, 0, 0),
	3, 3, TLV_DB_SCALE_ITEM(450, 0, 0),
	4, 4, TLV_DB_SCALE_ITEM(700, 0, 0),
	5, 5, TLV_DB_SCALE_ITEM(1000, 0, 0),
	6, 6, TLV_DB_SCALE_ITEM(1300, 0, 0),
	7, 7, TLV_DB_SCALE_ITEM(1600, 0, 0),
	8, 8, TLV_DB_SCALE_ITEM(1800, 0, 0),
	9, 9, TLV_DB_SCALE_ITEM(2100, 0, 0),
	10, 10, TLV_DB_SCALE_ITEM(2400, 0, 0),
);

static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(hpout_vol_tlv,
	0, 0, TLV_DB_SCALE_ITEM(-4800, 0, 0),
	1, 3, TLV_DB_SCALE_ITEM(-2400, 1200, 0),
);

static const char * const ng_type_txt[] =
	{ "Constant PGA Gain", "Mute ADC Output" };
static const struct soc_enum ng_type =
	SOC_ENUM_SINGLE(ES8316_ADC_ALC_NG, 6, 2, ng_type_txt);

static const char * const adcpol_txt[] = { "Normal", "Invert" };
static const struct soc_enum adcpol =
	SOC_ENUM_SINGLE(ES8316_ADC_MUTE, 1, 2, adcpol_txt);
static const char *const dacpol_txt[] =
	{ "Normal", "R Invert", "L Invert", "L + R Invert" };
static const struct soc_enum dacpol =
	SOC_ENUM_SINGLE(ES8316_DAC_SET1, 0, 4, dacpol_txt);

static const struct snd_kcontrol_new es8316_snd_controls[] = {
	SOC_DOUBLE_TLV("Headphone Playback Volume", ES8316_CPHP_ICAL_VOL,
		       4, 0, 3, 1, hpout_vol_tlv),
	SOC_DOUBLE_TLV("Headphone Mixer Volume", ES8316_HPMIX_VOL,
		       0, 4, 7, 0, hpmixer_gain_tlv),

	SOC_ENUM("Playback Polarity", dacpol),
	SOC_DOUBLE_R_TLV("DAC Playback Volume", ES8316_DAC_VOLL,
			 ES8316_DAC_VOLR, 0, 0xc0, 1, dac_vol_tlv),
	SOC_SINGLE("DAC Soft Ramp Switch", ES8316_DAC_SET1, 4, 1, 1),
	SOC_SINGLE("DAC Soft Ramp Rate", ES8316_DAC_SET1, 2, 4, 0),
	SOC_SINGLE("DAC Notch Filter Switch", ES8316_DAC_SET2, 6, 1, 0),
	SOC_SINGLE("DAC Double Fs Switch", ES8316_DAC_SET2, 7, 1, 0),
	SOC_SINGLE("DAC Stereo Enhancement", ES8316_DAC_SET3, 0, 7, 0),

	SOC_ENUM("Capture Polarity", adcpol),
	SOC_SINGLE("Mic Boost Switch", ES8316_ADC_D2SEPGA, 0, 1, 0),
	SOC_SINGLE_TLV("ADC Capture Volume", ES8316_ADC_VOLUME,
		       0, 0xc0, 1, adc_vol_tlv),
	SOC_SINGLE_TLV("ADC PGA Gain Volume", ES8316_ADC_PGAGAIN,
		       4, 10, 0, adc_pga_gain_tlv),
	SOC_SINGLE("ADC Soft Ramp Switch", ES8316_ADC_MUTE, 4, 1, 0),
	SOC_SINGLE("ADC Double Fs Switch", ES8316_ADC_DMIC, 4, 1, 0),

	SOC_SINGLE("ALC Capture Switch", ES8316_ADC_ALC1, 6, 1, 0),
	SOC_SINGLE_TLV("ALC Capture Max Volume", ES8316_ADC_ALC1, 0, 28, 0,
		       alc_max_gain_tlv),
	SOC_SINGLE_TLV("ALC Capture Min Volume", ES8316_ADC_ALC2, 0, 28, 0,
		       alc_min_gain_tlv),
	SOC_SINGLE_TLV("ALC Capture Target Volume", ES8316_ADC_ALC3, 4, 10, 0,
		       alc_target_tlv),
	SOC_SINGLE("ALC Capture Hold Time", ES8316_ADC_ALC3, 0, 10, 0),
	SOC_SINGLE("ALC Capture Decay Time", ES8316_ADC_ALC4, 4, 10, 0),
	SOC_SINGLE("ALC Capture Attack Time", ES8316_ADC_ALC4, 0, 10, 0),
	SOC_SINGLE("ALC Capture Noise Gate Switch", ES8316_ADC_ALC_NG,
		   5, 1, 0),
	SOC_SINGLE("ALC Capture Noise Gate Threshold", ES8316_ADC_ALC_NG,
		   0, 31, 0),
	SOC_ENUM("ALC Capture Noise Gate Type", ng_type),
};

/* Analog Input Mux */
static const char * const es8316_analog_in_txt[] = {
		"lin1-rin1",
		"lin2-rin2",
		"lin1-rin1 with 20db Boost",
		"lin2-rin2 with 20db Boost"
};
static const unsigned int es8316_analog_in_values[] = { 0, 1, 2, 3 };
static const struct soc_enum es8316_analog_input_enum =
	SOC_VALUE_ENUM_SINGLE(ES8316_ADC_PDN_LINSEL, 4, 3,
			      ARRAY_SIZE(es8316_analog_in_txt),
			      es8316_analog_in_txt,
			      es8316_analog_in_values);
static const struct snd_kcontrol_new es8316_analog_in_mux_controls =
	SOC_DAPM_ENUM("Route", es8316_analog_input_enum);

static const char * const es8316_dmic_txt[] = {
		"dmic disable",
		"dmic data at high level",
		"dmic data at low level",
};
static const unsigned int es8316_dmic_values[] = { 0, 1, 2 };
static const struct soc_enum es8316_dmic_src_enum =
	SOC_VALUE_ENUM_SINGLE(ES8316_ADC_DMIC, 0, 3,
			      ARRAY_SIZE(es8316_dmic_txt),
			      es8316_dmic_txt,
			      es8316_dmic_values);
static const struct snd_kcontrol_new es8316_dmic_src_controls =
	SOC_DAPM_ENUM("Route", es8316_dmic_src_enum);

/* hp mixer mux */
static const char * const es8316_hpmux_texts[] = {
	"lin1-rin1",
	"lin2-rin2",
	"lin-rin with Boost",
	"lin-rin with Boost and PGA"
};

static const unsigned int es8316_hpmux_values[] = { 0, 1, 2, 3 };

static SOC_ENUM_SINGLE_DECL(es8316_left_hpmux_enum, ES8316_HPMIX_SEL,
	4, es8316_hpmux_texts);

static const struct snd_kcontrol_new es8316_left_hpmux_controls =
	SOC_DAPM_ENUM("Route", es8316_left_hpmux_enum);

static SOC_ENUM_SINGLE_DECL(es8316_right_hpmux_enum, ES8316_HPMIX_SEL,
	0, es8316_hpmux_texts);

static const struct snd_kcontrol_new es8316_right_hpmux_controls =
	SOC_DAPM_ENUM("Route", es8316_right_hpmux_enum);

/* headphone Output Mixer */
static const struct snd_kcontrol_new es8316_out_left_mix[] = {
	SOC_DAPM_SINGLE("LLIN Switch", ES8316_HPMIX_SWITCH, 6, 1, 0),
	SOC_DAPM_SINGLE("Left DAC Switch", ES8316_HPMIX_SWITCH, 7, 1, 0),
};
static const struct snd_kcontrol_new es8316_out_right_mix[] = {
	SOC_DAPM_SINGLE("RLIN Switch", ES8316_HPMIX_SWITCH, 2, 1, 0),
	SOC_DAPM_SINGLE("Right DAC Switch", ES8316_HPMIX_SWITCH, 3, 1, 0),
};

/* DAC data source mux */
static const char * const es8316_dacsrc_texts[] = {
	"LDATA TO LDAC, RDATA TO RDAC",
	"LDATA TO LDAC, LDATA TO RDAC",
	"RDATA TO LDAC, RDATA TO RDAC",
	"RDATA TO LDAC, LDATA TO RDAC",
};

static const unsigned int es8316_dacsrc_values[] = { 0, 1, 2, 3 };

static SOC_ENUM_SINGLE_DECL(es8316_dacsrc_mux_enum, ES8316_DAC_SET1,
	6, es8316_dacsrc_texts);

static const struct snd_kcontrol_new es8316_dacsrc_mux_controls =
	SOC_DAPM_ENUM("Route", es8316_dacsrc_mux_enum);

static const struct snd_soc_dapm_widget es8316_dapm_widgets[] = {
	SND_SOC_DAPM_SUPPLY("Bias", ES8316_SYS_PDN, 3, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("Analog power", ES8316_SYS_PDN, 4, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("Mic Bias", ES8316_SYS_PDN, 5, 1, NULL, 0),

	SND_SOC_DAPM_INPUT("DMIC"),
	SND_SOC_DAPM_INPUT("MIC1"),
	SND_SOC_DAPM_INPUT("MIC2"),

	/* Input Mux */
	SND_SOC_DAPM_MUX("Differential Mux", SND_SOC_NOPM, 0, 0,
			 &es8316_analog_in_mux_controls),

	SND_SOC_DAPM_SUPPLY("ADC Vref", ES8316_SYS_PDN, 1, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("ADC bias", ES8316_SYS_PDN, 2, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("ADC Clock", ES8316_CLKMGR_CLKSW, 3, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Line input PGA", ES8316_ADC_PDN_LINSEL,
			 7, 1, NULL, 0),
	SND_SOC_DAPM_ADC("Mono ADC", NULL, ES8316_ADC_PDN_LINSEL, 6, 1),
	SND_SOC_DAPM_MUX("Digital Mic Mux", SND_SOC_NOPM, 0, 0,
			 &es8316_dmic_src_controls),

	/* Digital Interface */
	SND_SOC_DAPM_AIF_OUT("I2S OUT", "I2S1 Capture",  1,
			     ES8316_SERDATA_ADC, 6, 1),
	SND_SOC_DAPM_AIF_IN("I2S IN", "I2S1 Playback", 0,
			    SND_SOC_NOPM, 0, 0),

	SND_SOC_DAPM_MUX("DAC Source Mux", SND_SOC_NOPM, 0, 0,
			 &es8316_dacsrc_mux_controls),

	SND_SOC_DAPM_SUPPLY("DAC Vref", ES8316_SYS_PDN, 0, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("DAC Clock", ES8316_CLKMGR_CLKSW, 2, 0, NULL, 0),
	SND_SOC_DAPM_DAC("Right DAC", NULL, ES8316_DAC_PDN, 0, 1),
	SND_SOC_DAPM_DAC("Left DAC", NULL, ES8316_DAC_PDN, 4, 1),

	/* Headphone Output Side */
	SND_SOC_DAPM_MUX("Left Headphone Mux", SND_SOC_NOPM, 0, 0,
			 &es8316_left_hpmux_controls),
	SND_SOC_DAPM_MUX("Right Headphone Mux", SND_SOC_NOPM, 0, 0,
			 &es8316_right_hpmux_controls),
	SND_SOC_DAPM_MIXER("Left Headphone Mixer", ES8316_HPMIX_PDN,
			   5, 1, &es8316_out_left_mix[0],
			   ARRAY_SIZE(es8316_out_left_mix)),
	SND_SOC_DAPM_MIXER("Right Headphone Mixer", ES8316_HPMIX_PDN,
			   1, 1, &es8316_out_right_mix[0],
			   ARRAY_SIZE(es8316_out_right_mix)),
	SND_SOC_DAPM_PGA("Left Headphone Mixer Out", ES8316_HPMIX_PDN,
			 4, 1, NULL, 0),
	SND_SOC_DAPM_PGA("Right Headphone Mixer Out", ES8316_HPMIX_PDN,
			 0, 1, NULL, 0),

	SND_SOC_DAPM_OUT_DRV("Left Headphone Charge Pump", ES8316_CPHP_OUTEN,
			     6, 0, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("Right Headphone Charge Pump", ES8316_CPHP_OUTEN,
			     2, 0, NULL, 0),
	SND_SOC_DAPM_SUPPLY("Headphone Charge Pump", ES8316_CPHP_PDN2,
			    5, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("Headphone Charge Pump Clock", ES8316_CLKMGR_CLKSW,
			    4, 0, NULL, 0),

	SND_SOC_DAPM_OUT_DRV("Left Headphone Driver", ES8316_CPHP_OUTEN,
			     5, 0, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("Right Headphone Driver", ES8316_CPHP_OUTEN,
			     1, 0, NULL, 0),
	SND_SOC_DAPM_SUPPLY("Headphone Out", ES8316_CPHP_PDN1, 2, 1, NULL, 0),

	/* pdn_Lical and pdn_Rical bits are documented as Reserved, but must
	 * be explicitly unset in order to enable HP output
	 */
	SND_SOC_DAPM_SUPPLY("Left Headphone ical", ES8316_CPHP_ICAL_VOL,
			    7, 1, NULL, 0),
	SND_SOC_DAPM_SUPPLY("Right Headphone ical", ES8316_CPHP_ICAL_VOL,
			    3, 1, NULL, 0),

	SND_SOC_DAPM_OUTPUT("HPOL"),
	SND_SOC_DAPM_OUTPUT("HPOR"),
};

static const struct snd_soc_dapm_route es8316_dapm_routes[] = {
	/* Recording */
	{"MIC1", NULL, "Mic Bias"},
	{"MIC2", NULL, "Mic Bias"},
	{"MIC1", NULL, "Bias"},
	{"MIC2", NULL, "Bias"},
	{"MIC1", NULL, "Analog power"},
	{"MIC2", NULL, "Analog power"},

	{"Differential Mux", "lin1-rin1", "MIC1"},
	{"Differential Mux", "lin2-rin2", "MIC2"},
	{"Line input PGA", NULL, "Differential Mux"},

	{"Mono ADC", NULL, "ADC Clock"},
	{"Mono ADC", NULL, "ADC Vref"},
	{"Mono ADC", NULL, "ADC bias"},
	{"Mono ADC", NULL, "Line input PGA"},

	/* It's not clear why, but to avoid recording only silence,
	 * the DAC clock must be running for the ADC to work.
	 */
	{"Mono ADC", NULL, "DAC Clock"},

	{"Digital Mic Mux", "dmic disable", "Mono ADC"},

	{"I2S OUT", NULL, "Digital Mic Mux"},

	/* Playback */
	{"DAC Source Mux", "LDATA TO LDAC, RDATA TO RDAC", "I2S IN"},

	{"Left DAC", NULL, "DAC Clock"},
	{"Right DAC", NULL, "DAC Clock"},

	{"Left DAC", NULL, "DAC Vref"},
	{"Right DAC", NULL, "DAC Vref"},

	{"Left DAC", NULL, "DAC Source Mux"},
	{"Right DAC", NULL, "DAC Source Mux"},

	{"Left Headphone Mux", "lin-rin with Boost and PGA", "Line input PGA"},
	{"Right Headphone Mux", "lin-rin with Boost and PGA", "Line input PGA"},

	{"Left Headphone Mixer", "LLIN Switch", "Left Headphone Mux"},
	{"Left Headphone Mixer", "Left DAC Switch", "Left DAC"},

	{"Right Headphone Mixer", "RLIN Switch", "Right Headphone Mux"},
	{"Right Headphone Mixer", "Right DAC Switch", "Right DAC"},

	{"Left Headphone Mixer Out", NULL, "Left Headphone Mixer"},
	{"Right Headphone Mixer Out", NULL, "Right Headphone Mixer"},

	{"Left Headphone Charge Pump", NULL, "Left Headphone Mixer Out"},
	{"Right Headphone Charge Pump", NULL, "Right Headphone Mixer Out"},

	{"Left Headphone Charge Pump", NULL, "Headphone Charge Pump"},
	{"Right Headphone Charge Pump", NULL, "Headphone Charge Pump"},

	{"Left Headphone Charge Pump", NULL, "Headphone Charge Pump Clock"},
	{"Right Headphone Charge Pump", NULL, "Headphone Charge Pump Clock"},

	{"Left Headphone Driver", NULL, "Left Headphone Charge Pump"},
	{"Right Headphone Driver", NULL, "Right Headphone Charge Pump"},

	{"HPOL", NULL, "Left Headphone Driver"},
	{"HPOR", NULL, "Right Headphone Driver"},

	{"HPOL", NULL, "Left Headphone ical"},
	{"HPOR", NULL, "Right Headphone ical"},

	{"Headphone Out", NULL, "Bias"},
	{"Headphone Out", NULL, "Analog power"},
	{"HPOL", NULL, "Headphone Out"},
	{"HPOR", NULL, "Headphone Out"},
};

static int es8316_set_dai_sysclk(struct snd_soc_dai *codec_dai,
				 int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct es8316_priv *es8316 = snd_soc_codec_get_drvdata(codec);
	int i;
	int count = 0;

	es8316->sysclk = freq;

	if (freq == 0)
		return 0;

	/* Limit supported sample rates to ones that can be autodetected
	 * by the codec running in slave mode.
	 */
	for (i = 0; i < NR_SUPPORTED_MCLK_LRCK_RATIOS; i++) {
		const unsigned int ratio = supported_mclk_lrck_ratios[i];

		if (freq % ratio == 0)
			es8316->allowed_rates[count++] = freq / ratio;
	}

	es8316->sysclk_constraints.list = es8316->allowed_rates;
	es8316->sysclk_constraints.count = count;

	return 0;
}

static int es8316_set_dai_fmt(struct snd_soc_dai *codec_dai,
			      unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u8 serdata1 = 0;
	u8 serdata2 = 0;
	u8 clksw;
	u8 mask;

	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
		dev_err(codec->dev, "Codec driver only supports slave mode\n");
		return -EINVAL;
	}

	if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S) {
		dev_err(codec->dev, "Codec driver only supports I2S format\n");
		return -EINVAL;
	}

	/* Clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		serdata1 |= ES8316_SERDATA1_BCLK_INV;
		serdata2 |= ES8316_SERDATA2_ADCLRP;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		serdata1 |= ES8316_SERDATA1_BCLK_INV;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		serdata2 |= ES8316_SERDATA2_ADCLRP;
		break;
	default:
		return -EINVAL;
	}

	mask = ES8316_SERDATA1_MASTER | ES8316_SERDATA1_BCLK_INV;
	snd_soc_update_bits(codec, ES8316_SERDATA1, mask, serdata1);

	mask = ES8316_SERDATA2_FMT_MASK | ES8316_SERDATA2_ADCLRP;
	snd_soc_update_bits(codec, ES8316_SERDATA_ADC, mask, serdata2);
	snd_soc_update_bits(codec, ES8316_SERDATA_DAC, mask, serdata2);

	/* Enable BCLK and MCLK inputs in slave mode */
	clksw = ES8316_CLKMGR_CLKSW_MCLK_ON | ES8316_CLKMGR_CLKSW_BCLK_ON;
	snd_soc_update_bits(codec, ES8316_CLKMGR_CLKSW, clksw, clksw);

	return 0;
}

static int es8316_pcm_startup(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct es8316_priv *es8316 = snd_soc_codec_get_drvdata(codec);

	if (es8316->sysclk == 0) {
		dev_err(codec->dev, "No sysclk provided\n");
		return -EINVAL;
	}

	/* The set of sample rates that can be supported depends on the
	 * MCLK supplied to the CODEC.
	 */
	snd_pcm_hw_constraint_list(substream->runtime, 0,
				   SNDRV_PCM_HW_PARAM_RATE,
				   &es8316->sysclk_constraints);

	return 0;
}

static int es8316_pcm_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	struct es8316_priv *es8316 = snd_soc_codec_get_drvdata(codec);
	u8 wordlen = 0;

	if (!es8316->sysclk) {
		dev_err(codec->dev, "No MCLK configured\n");
		return -EINVAL;
	}

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		wordlen = ES8316_SERDATA2_LEN_16;
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		wordlen = ES8316_SERDATA2_LEN_20;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		wordlen = ES8316_SERDATA2_LEN_24;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		wordlen = ES8316_SERDATA2_LEN_32;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_update_bits(codec, ES8316_SERDATA_DAC,
			    ES8316_SERDATA2_LEN_MASK, wordlen);
	snd_soc_update_bits(codec, ES8316_SERDATA_ADC,
			    ES8316_SERDATA2_LEN_MASK, wordlen);
	return 0;
}

static int es8316_mute(struct snd_soc_dai *dai, int mute)
{
	snd_soc_update_bits(dai->codec, ES8316_DAC_SET1, 0x20,
			    mute ? 0x20 : 0);
	return 0;
}

#define ES8316_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
			SNDRV_PCM_FMTBIT_S24_LE)

static struct snd_soc_dai_ops es8316_ops = {
	.startup = es8316_pcm_startup,
	.hw_params = es8316_pcm_hw_params,
	.set_fmt = es8316_set_dai_fmt,
	.set_sysclk = es8316_set_dai_sysclk,
	.digital_mute = es8316_mute,
};

static struct snd_soc_dai_driver es8316_dai = {
	.name = "ES8316 HiFi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_48000,
		.formats = ES8316_FORMATS,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_48000,
		.formats = ES8316_FORMATS,
	},
	.ops = &es8316_ops,
	.symmetric_rates = 1,
};

static int es8316_probe(struct snd_soc_codec *codec)
{
	/* Reset codec and enable current state machine */
	snd_soc_write(codec, ES8316_RESET, 0x3f);
	usleep_range(5000, 5500);
	snd_soc_write(codec, ES8316_RESET, ES8316_RESET_CSM_ON);
	msleep(30);

	/*
	 * Documentation is unclear, but this value from the vendor driver is
	 * needed otherwise audio output is silent.
	 */
	snd_soc_write(codec, ES8316_SYS_VMIDSEL, 0xff);

	/*
	 * Documentation for this register is unclear and incomplete,
	 * but here is a vendor-provided value that improves volume
	 * and quality for Intel CHT platforms.
	 */
	snd_soc_write(codec, ES8316_CLKMGR_ADCOSR, 0x32);

	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_es8316 = {
	.probe		= es8316_probe,
	.idle_bias_off	= true,

	.component_driver = {
		.controls		= es8316_snd_controls,
		.num_controls		= ARRAY_SIZE(es8316_snd_controls),
		.dapm_widgets		= es8316_dapm_widgets,
		.num_dapm_widgets	= ARRAY_SIZE(es8316_dapm_widgets),
		.dapm_routes		= es8316_dapm_routes,
		.num_dapm_routes	= ARRAY_SIZE(es8316_dapm_routes),
	},
};

static const struct regmap_config es8316_regmap = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = 0x53,
	.cache_type = REGCACHE_RBTREE,
};

static int es8316_i2c_probe(struct i2c_client *i2c_client,
			    const struct i2c_device_id *id)
{
	struct es8316_priv *es8316;
	struct regmap *regmap;

	es8316 = devm_kzalloc(&i2c_client->dev, sizeof(struct es8316_priv),
			      GFP_KERNEL);
	if (es8316 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c_client, es8316);

	regmap = devm_regmap_init_i2c(i2c_client, &es8316_regmap);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	return snd_soc_register_codec(&i2c_client->dev, &soc_codec_dev_es8316,
				      &es8316_dai, 1);
}

static int es8316_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	return 0;
}

static const struct i2c_device_id es8316_i2c_id[] = {
	{"es8316", 0 },
	{}
};
MODULE_DEVICE_TABLE(i2c, es8316_i2c_id);

static const struct of_device_id es8316_of_match[] = {
	{ .compatible = "everest,es8316", },
	{},
};
MODULE_DEVICE_TABLE(of, es8316_of_match);

static const struct acpi_device_id es8316_acpi_match[] = {
	{"ESSX8316", 0},
	{},
};
MODULE_DEVICE_TABLE(acpi, es8316_acpi_match);

static struct i2c_driver es8316_i2c_driver = {
	.driver = {
		.name			= "es8316",
		.acpi_match_table	= ACPI_PTR(es8316_acpi_match),
		.of_match_table		= of_match_ptr(es8316_of_match),
	},
	.probe		= es8316_i2c_probe,
	.remove		= es8316_i2c_remove,
	.id_table	= es8316_i2c_id,
};
module_i2c_driver(es8316_i2c_driver);

MODULE_DESCRIPTION("Everest Semi ES8316 ALSA SoC Codec Driver");
MODULE_AUTHOR("David Yang <yangxiaohua@everest-semi.com>");
MODULE_LICENSE("GPL v2");