summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/tas2770.c
blob: 3cb634c2826103252ce04a00554be9794e631b82 (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
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
// SPDX-License-Identifier: GPL-2.0
//
// ALSA SoC Texas Instruments TAS2770 20-W Digital Input Mono Class-D
// Audio Amplifier with Speaker I/V Sense
//
// Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/
//	Author: Tracy Yi <tracy-yi@ti.com>
//	Frank Shi <shifu0704@thundersoft.com>

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <linux/firmware.h>
#include <linux/regmap.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "tas2770.h"

#define TAS2770_MDELAY 0xFFFFFFFE

static void tas2770_reset(struct tas2770_priv *tas2770)
{
	if (tas2770->reset_gpio) {
		gpiod_set_value_cansleep(tas2770->reset_gpio, 0);
		msleep(20);
		gpiod_set_value_cansleep(tas2770->reset_gpio, 1);
		usleep_range(1000, 2000);
	}

	snd_soc_component_write(tas2770->component, TAS2770_SW_RST,
		TAS2770_RST);
	usleep_range(1000, 2000);
}

static int tas2770_set_bias_level(struct snd_soc_component *component,
				 enum snd_soc_bias_level level)
{
	struct tas2770_priv *tas2770 =
			snd_soc_component_get_drvdata(component);

	switch (level) {
	case SND_SOC_BIAS_ON:
		snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
					      TAS2770_PWR_CTRL_MASK,
					      TAS2770_PWR_CTRL_ACTIVE);
		break;
	case SND_SOC_BIAS_STANDBY:
	case SND_SOC_BIAS_PREPARE:
		snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
					      TAS2770_PWR_CTRL_MASK,
					      TAS2770_PWR_CTRL_MUTE);
		break;
	case SND_SOC_BIAS_OFF:
		snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
					      TAS2770_PWR_CTRL_MASK,
					      TAS2770_PWR_CTRL_SHUTDOWN);
		break;

	default:
		dev_err(tas2770->dev, "wrong power level setting %d\n", level);
		return -EINVAL;
	}

	return 0;
}

#ifdef CONFIG_PM
static int tas2770_codec_suspend(struct snd_soc_component *component)
{
	struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
	int ret = 0;

	regcache_cache_only(tas2770->regmap, true);
	regcache_mark_dirty(tas2770->regmap);

	if (tas2770->sdz_gpio) {
		gpiod_set_value_cansleep(tas2770->sdz_gpio, 0);
	} else {
		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
						    TAS2770_PWR_CTRL_MASK,
						    TAS2770_PWR_CTRL_SHUTDOWN);
		if (ret < 0) {
			regcache_cache_only(tas2770->regmap, false);
			regcache_sync(tas2770->regmap);
			return ret;
		}

		ret = 0;
	}

	return ret;
}

static int tas2770_codec_resume(struct snd_soc_component *component)
{
	struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
	int ret;

	if (tas2770->sdz_gpio) {
		gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
		usleep_range(1000, 2000);
	} else {
		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
						    TAS2770_PWR_CTRL_MASK,
						    TAS2770_PWR_CTRL_ACTIVE);
		if (ret < 0)
			return ret;
	}

	regcache_cache_only(tas2770->regmap, false);

	return regcache_sync(tas2770->regmap);
}
#else
#define tas2770_codec_suspend NULL
#define tas2770_codec_resume NULL
#endif

static const char * const tas2770_ASI1_src[] = {
	"I2C offset", "Left", "Right", "LeftRightDiv2",
};

static SOC_ENUM_SINGLE_DECL(
	tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2,
	4, tas2770_ASI1_src);

static const struct snd_kcontrol_new tas2770_asi1_mux =
	SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum);

static int tas2770_dac_event(struct snd_soc_dapm_widget *w,
			     struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_component *component =
			snd_soc_dapm_to_component(w->dapm);
	struct tas2770_priv *tas2770 =
			snd_soc_component_get_drvdata(component);
	int ret;

	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
						    TAS2770_PWR_CTRL_MASK,
						    TAS2770_PWR_CTRL_MUTE);
		break;
	case SND_SOC_DAPM_PRE_PMD:
		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
						    TAS2770_PWR_CTRL_MASK,
						    TAS2770_PWR_CTRL_SHUTDOWN);
		break;
	default:
		dev_err(tas2770->dev, "Not supported evevt\n");
		return -EINVAL;
	}

	if (ret < 0)
		return ret;

	return 0;
}

static const struct snd_kcontrol_new isense_switch =
	SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1);
static const struct snd_kcontrol_new vsense_switch =
	SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1);

static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = {
	SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux),
	SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch),
	SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch),
	SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event,
			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
	SND_SOC_DAPM_OUTPUT("OUT"),
	SND_SOC_DAPM_SIGGEN("VMON"),
	SND_SOC_DAPM_SIGGEN("IMON")
};

static const struct snd_soc_dapm_route tas2770_audio_map[] = {
	{"ASI1 Sel", "I2C offset", "ASI1"},
	{"ASI1 Sel", "Left", "ASI1"},
	{"ASI1 Sel", "Right", "ASI1"},
	{"ASI1 Sel", "LeftRightDiv2", "ASI1"},
	{"DAC", NULL, "ASI1 Sel"},
	{"OUT", NULL, "DAC"},
	{"ISENSE", "Switch", "IMON"},
	{"VSENSE", "Switch", "VMON"},
};

static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction)
{
	struct snd_soc_component *component = dai->component;
	int ret;

	if (mute)
		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
						    TAS2770_PWR_CTRL_MASK,
						    TAS2770_PWR_CTRL_MUTE);
	else
		ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
						    TAS2770_PWR_CTRL_MASK,
						    TAS2770_PWR_CTRL_ACTIVE);

	if (ret < 0)
		return ret;

	return 0;
}

static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth)
{
	int ret;
	struct snd_soc_component *component = tas2770->component;

	switch (bitwidth) {
	case SNDRV_PCM_FORMAT_S16_LE:
		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
						    TAS2770_TDM_CFG_REG2_RXW_MASK,
						    TAS2770_TDM_CFG_REG2_RXW_16BITS);
		tas2770->v_sense_slot = tas2770->i_sense_slot + 2;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
						    TAS2770_TDM_CFG_REG2_RXW_MASK,
						    TAS2770_TDM_CFG_REG2_RXW_24BITS);
		tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
						    TAS2770_TDM_CFG_REG2_RXW_MASK,
						    TAS2770_TDM_CFG_REG2_RXW_32BITS);
		tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
		break;

	default:
		return -EINVAL;
	}

	if (ret < 0)
		return ret;

	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5,
					    TAS2770_TDM_CFG_REG5_VSNS_MASK |
					    TAS2770_TDM_CFG_REG5_50_MASK,
					    TAS2770_TDM_CFG_REG5_VSNS_ENABLE |
		tas2770->v_sense_slot);
	if (ret < 0)
		return ret;

	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6,
					    TAS2770_TDM_CFG_REG6_ISNS_MASK |
					    TAS2770_TDM_CFG_REG6_50_MASK,
					    TAS2770_TDM_CFG_REG6_ISNS_ENABLE |
					    tas2770->i_sense_slot);
	if (ret < 0)
		return ret;

	return 0;
}

static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate)
{
	struct snd_soc_component *component = tas2770->component;
	int ramp_rate_val;
	int ret;

	switch (samplerate) {
	case 48000:
		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
				TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
		break;
	case 44100:
		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
				TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
		break;
	case 96000:
		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
				TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
		break;
	case 88200:
		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
				TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
		break;
	case 192000:
		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
				TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
		break;
	case 176400:
		ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
				TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
		break;
	default:
		return -EINVAL;
	}

	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
					    TAS2770_TDM_CFG_REG0_SMP_MASK |
					    TAS2770_TDM_CFG_REG0_31_MASK,
					    ramp_rate_val);
	if (ret < 0)
		return ret;

	return 0;
}

static int tas2770_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params,
			     struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	struct tas2770_priv *tas2770 =
			snd_soc_component_get_drvdata(component);
	int ret;

	ret = tas2770_set_bitwidth(tas2770, params_format(params));
	if (ret)
		return ret;

	return tas2770_set_samplerate(tas2770, params_rate(params));
}

static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_component *component = dai->component;
	struct tas2770_priv *tas2770 =
			snd_soc_component_get_drvdata(component);
	u8 tdm_rx_start_slot = 0, asi_cfg_1 = 0;
	int ret;

	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
	case SND_SOC_DAIFMT_CBC_CFC:
		break;
	default:
		dev_err(tas2770->dev, "ASI invalid DAI clocking\n");
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
		break;
	default:
		dev_err(tas2770->dev, "ASI format Inverse is not found\n");
		return -EINVAL;
	}

	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
					    TAS2770_TDM_CFG_REG1_RX_MASK,
					    asi_cfg_1);
	if (ret < 0)
		return ret;

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		tdm_rx_start_slot = 1;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		tdm_rx_start_slot = 0;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		tdm_rx_start_slot = 1;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		tdm_rx_start_slot = 0;
		break;
	default:
		dev_err(tas2770->dev,
			"DAI Format is not found, fmt=0x%x\n", fmt);
		return -EINVAL;
	}

	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
					    TAS2770_TDM_CFG_REG1_MASK,
					    (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT));
	if (ret < 0)
		return ret;

	return 0;
}

static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai,
				unsigned int tx_mask,
				unsigned int rx_mask,
				int slots, int slot_width)
{
	struct snd_soc_component *component = dai->component;
	int left_slot, right_slot;
	int ret;

	if (tx_mask == 0 || rx_mask != 0)
		return -EINVAL;

	if (slots == 1) {
		if (tx_mask != 1)
			return -EINVAL;

		left_slot = 0;
		right_slot = 0;
	} else {
		left_slot = __ffs(tx_mask);
		tx_mask &= ~(1 << left_slot);
		if (tx_mask == 0) {
			right_slot = left_slot;
		} else {
			right_slot = __ffs(tx_mask);
			tx_mask &= ~(1 << right_slot);
		}
	}

	if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
		return -EINVAL;

	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
					    TAS2770_TDM_CFG_REG3_30_MASK,
					    (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT));
	if (ret < 0)
		return ret;
	ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
					    TAS2770_TDM_CFG_REG3_RXS_MASK,
					    (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT));
	if (ret < 0)
		return ret;

	switch (slot_width) {
	case 16:
		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
						    TAS2770_TDM_CFG_REG2_RXS_MASK,
						    TAS2770_TDM_CFG_REG2_RXS_16BITS);
		break;
	case 24:
		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
						    TAS2770_TDM_CFG_REG2_RXS_MASK,
						    TAS2770_TDM_CFG_REG2_RXS_24BITS);
		break;
	case 32:
		ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
						    TAS2770_TDM_CFG_REG2_RXS_MASK,
						    TAS2770_TDM_CFG_REG2_RXS_32BITS);
		break;
	case 0:
		/* Do not change slot width */
		ret = 0;
		break;
	default:
		ret = -EINVAL;
	}

	if (ret < 0)
		return ret;

	return 0;
}

static const struct snd_soc_dai_ops tas2770_dai_ops = {
	.mute_stream = tas2770_mute,
	.hw_params  = tas2770_hw_params,
	.set_fmt    = tas2770_set_fmt,
	.set_tdm_slot = tas2770_set_dai_tdm_slot,
	.no_capture_mute = 1,
};

#define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

#define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
					   SNDRV_PCM_RATE_96000 |\
					    SNDRV_PCM_RATE_192000\
					  )

static struct snd_soc_dai_driver tas2770_dai_driver[] = {
	{
		.name = "tas2770 ASI1",
		.id = 0,
		.playback = {
			.stream_name    = "ASI1 Playback",
			.channels_min   = 2,
			.channels_max   = 2,
			.rates      = TAS2770_RATES,
			.formats    = TAS2770_FORMATS,
		},
		.capture = {
			.stream_name    = "ASI1 Capture",
			.channels_min   = 0,
			.channels_max   = 2,
			.rates          = TAS2770_RATES,
			.formats    = TAS2770_FORMATS,
		},
		.ops = &tas2770_dai_ops,
		.symmetric_rate = 1,
	},
};

static int tas2770_codec_probe(struct snd_soc_component *component)
{
	struct tas2770_priv *tas2770 =
			snd_soc_component_get_drvdata(component);

	tas2770->component = component;

	if (tas2770->sdz_gpio) {
		gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
		usleep_range(1000, 2000);
	}

	tas2770_reset(tas2770);

	return 0;
}

static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0);

static const struct snd_kcontrol_new tas2770_snd_controls[] = {
	SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
		       0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
	SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
		       tas2770_digital_tlv),
};

static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
	.probe			= tas2770_codec_probe,
	.suspend		= tas2770_codec_suspend,
	.resume			= tas2770_codec_resume,
	.set_bias_level = tas2770_set_bias_level,
	.controls		= tas2770_snd_controls,
	.num_controls		= ARRAY_SIZE(tas2770_snd_controls),
	.dapm_widgets		= tas2770_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(tas2770_dapm_widgets),
	.dapm_routes		= tas2770_audio_map,
	.num_dapm_routes	= ARRAY_SIZE(tas2770_audio_map),
	.idle_bias_on		= 1,
	.endianness		= 1,
};

static int tas2770_register_codec(struct tas2770_priv *tas2770)
{
	return devm_snd_soc_register_component(tas2770->dev,
		&soc_component_driver_tas2770,
		tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
}

static const struct reg_default tas2770_reg_defaults[] = {
	{ TAS2770_PAGE, 0x00 },
	{ TAS2770_SW_RST, 0x00 },
	{ TAS2770_PWR_CTRL, 0x0e },
	{ TAS2770_PLAY_CFG_REG0, 0x10 },
	{ TAS2770_PLAY_CFG_REG1, 0x01 },
	{ TAS2770_PLAY_CFG_REG2, 0x00 },
	{ TAS2770_MSC_CFG_REG0, 0x07 },
	{ TAS2770_TDM_CFG_REG1, 0x02 },
	{ TAS2770_TDM_CFG_REG2, 0x0a },
	{ TAS2770_TDM_CFG_REG3, 0x10 },
	{ TAS2770_INT_MASK_REG0, 0xfc },
	{ TAS2770_INT_MASK_REG1, 0xb1 },
	{ TAS2770_INT_CFG, 0x05 },
	{ TAS2770_MISC_IRQ, 0x81 },
	{ TAS2770_CLK_CGF, 0x0c },

};

static bool tas2770_volatile(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case TAS2770_PAGE: /* regmap implementation requires this */
	case TAS2770_SW_RST: /* always clears after write */
	case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
	case TAS2770_LVE_INT_REG0:
	case TAS2770_LVE_INT_REG1:
	case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
	case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
	case TAS2770_VBAT_MSB:
	case TAS2770_VBAT_LSB:
	case TAS2770_TEMP_MSB:
	case TAS2770_TEMP_LSB:
		return true;
	}

	return false;
}

static bool tas2770_writeable(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case TAS2770_LVE_INT_REG0:
	case TAS2770_LVE_INT_REG1:
	case TAS2770_LAT_INT_REG0:
	case TAS2770_LAT_INT_REG1:
	case TAS2770_VBAT_MSB:
	case TAS2770_VBAT_LSB:
	case TAS2770_TEMP_MSB:
	case TAS2770_TEMP_LSB:
	case TAS2770_TDM_CLK_DETC:
	case TAS2770_REV_AND_GPID:
		return false;
	}

	return true;
}

static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
	{
		.range_min = 0,
		.range_max = 1 * 128,
		.selector_reg = TAS2770_PAGE,
		.selector_mask = 0xff,
		.selector_shift = 0,
		.window_start = 0,
		.window_len = 128,
	},
};

static const struct regmap_config tas2770_i2c_regmap = {
	.reg_bits = 8,
	.val_bits = 8,
	.writeable_reg = tas2770_writeable,
	.volatile_reg = tas2770_volatile,
	.reg_defaults = tas2770_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
	.cache_type = REGCACHE_RBTREE,
	.ranges = tas2770_regmap_ranges,
	.num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
	.max_register = 1 * 128,
};

static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
{
	int rc = 0;

	rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
				      &tas2770->i_sense_slot);
	if (rc) {
		dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
			 "ti,imon-slot-no");

		tas2770->i_sense_slot = 0;
	}

	rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
				      &tas2770->v_sense_slot);
	if (rc) {
		dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
			 "ti,vmon-slot-no");

		tas2770->v_sense_slot = 2;
	}

	tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
	if (IS_ERR(tas2770->sdz_gpio)) {
		if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
			return -EPROBE_DEFER;

		tas2770->sdz_gpio = NULL;
	}

	return 0;
}

static int tas2770_i2c_probe(struct i2c_client *client)
{
	struct tas2770_priv *tas2770;
	int result;

	tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
			       GFP_KERNEL);
	if (!tas2770)
		return -ENOMEM;

	tas2770->dev = &client->dev;
	i2c_set_clientdata(client, tas2770);
	dev_set_drvdata(&client->dev, tas2770);

	tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
	if (IS_ERR(tas2770->regmap)) {
		result = PTR_ERR(tas2770->regmap);
		dev_err(&client->dev, "Failed to allocate register map: %d\n",
			result);
		return result;
	}

	if (client->dev.of_node) {
		result = tas2770_parse_dt(&client->dev, tas2770);
		if (result) {
			dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
				__func__);
			return result;
		}
	}

	tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
						      GPIOD_OUT_HIGH);
	if (IS_ERR(tas2770->reset_gpio)) {
		if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
			tas2770->reset_gpio = NULL;
			return -EPROBE_DEFER;
		}
	}

	result = tas2770_register_codec(tas2770);
	if (result)
		dev_err(tas2770->dev, "Register codec failed.\n");

	return result;
}

static const struct i2c_device_id tas2770_i2c_id[] = {
	{ "tas2770", 0},
	{ }
};
MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);

#if defined(CONFIG_OF)
static const struct of_device_id tas2770_of_match[] = {
	{ .compatible = "ti,tas2770" },
	{},
};
MODULE_DEVICE_TABLE(of, tas2770_of_match);
#endif

static struct i2c_driver tas2770_i2c_driver = {
	.driver = {
		.name   = "tas2770",
		.of_match_table = of_match_ptr(tas2770_of_match),
	},
	.probe_new  = tas2770_i2c_probe,
	.id_table   = tas2770_i2c_id,
};
module_i2c_driver(tas2770_i2c_driver);

MODULE_AUTHOR("Shi Fu <shifu0704@thundersoft.com>");
MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
MODULE_LICENSE("GPL v2");