Free Electrons

Embedded Linux Experts

  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
/*
 * Driver for ADAU1701 SigmaDSP processor
 *
 * Copyright 2011 Analog Devices Inc.
 * Author: Lars-Peter Clausen <lars@metafoo.de>
 *	based on an inital version by Cliff Cai <cliff.cai@analog.com>
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "sigmadsp.h"
#include "adau1701.h"

#define ADAU1701_DSPCTRL	0x1c
#define ADAU1701_SEROCTL	0x1e
#define ADAU1701_SERICTL	0x1f

#define ADAU1701_AUXNPOW	0x22

#define ADAU1701_OSCIPOW	0x26
#define ADAU1701_DACSET		0x27

#define ADAU1701_NUM_REGS	0x28

#define ADAU1701_DSPCTRL_CR		(1 << 2)
#define ADAU1701_DSPCTRL_DAM		(1 << 3)
#define ADAU1701_DSPCTRL_ADM		(1 << 4)
#define ADAU1701_DSPCTRL_SR_48		0x00
#define ADAU1701_DSPCTRL_SR_96		0x01
#define ADAU1701_DSPCTRL_SR_192		0x02
#define ADAU1701_DSPCTRL_SR_MASK	0x03

#define ADAU1701_SEROCTL_INV_LRCLK	0x2000
#define ADAU1701_SEROCTL_INV_BCLK	0x1000
#define ADAU1701_SEROCTL_MASTER		0x0800

#define ADAU1701_SEROCTL_OBF16		0x0000
#define ADAU1701_SEROCTL_OBF8		0x0200
#define ADAU1701_SEROCTL_OBF4		0x0400
#define ADAU1701_SEROCTL_OBF2		0x0600
#define ADAU1701_SEROCTL_OBF_MASK	0x0600

#define ADAU1701_SEROCTL_OLF1024	0x0000
#define ADAU1701_SEROCTL_OLF512		0x0080
#define ADAU1701_SEROCTL_OLF256		0x0100
#define ADAU1701_SEROCTL_OLF_MASK	0x0180

#define ADAU1701_SEROCTL_MSB_DEALY1	0x0000
#define ADAU1701_SEROCTL_MSB_DEALY0	0x0004
#define ADAU1701_SEROCTL_MSB_DEALY8	0x0008
#define ADAU1701_SEROCTL_MSB_DEALY12	0x000c
#define ADAU1701_SEROCTL_MSB_DEALY16	0x0010
#define ADAU1701_SEROCTL_MSB_DEALY_MASK	0x001c

#define ADAU1701_SEROCTL_WORD_LEN_24	0x0000
#define ADAU1701_SEROCTL_WORD_LEN_20	0x0001
#define ADAU1701_SEROCTL_WORD_LEN_16	0x0010
#define ADAU1701_SEROCTL_WORD_LEN_MASK	0x0003

#define ADAU1701_AUXNPOW_VBPD		0x40
#define ADAU1701_AUXNPOW_VRPD		0x20

#define ADAU1701_SERICTL_I2S		0
#define ADAU1701_SERICTL_LEFTJ		1
#define ADAU1701_SERICTL_TDM		2
#define ADAU1701_SERICTL_RIGHTJ_24	3
#define ADAU1701_SERICTL_RIGHTJ_20	4
#define ADAU1701_SERICTL_RIGHTJ_18	5
#define ADAU1701_SERICTL_RIGHTJ_16	6
#define ADAU1701_SERICTL_MODE_MASK	7
#define ADAU1701_SERICTL_INV_BCLK	BIT(3)
#define ADAU1701_SERICTL_INV_LRCLK	BIT(4)

#define ADAU1701_OSCIPOW_OPD		0x04
#define ADAU1701_DACSET_DACINIT		1

#define ADAU1701_FIRMWARE "adau1701.bin"

struct adau1701 {
	unsigned int dai_fmt;
};

static const struct snd_kcontrol_new adau1701_controls[] = {
	SOC_SINGLE("Master Capture Switch", ADAU1701_DSPCTRL, 4, 1, 0),
};

static const struct snd_soc_dapm_widget adau1701_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC0", "Playback", ADAU1701_AUXNPOW, 3, 1),
	SND_SOC_DAPM_DAC("DAC1", "Playback", ADAU1701_AUXNPOW, 2, 1),
	SND_SOC_DAPM_DAC("DAC2", "Playback", ADAU1701_AUXNPOW, 1, 1),
	SND_SOC_DAPM_DAC("DAC3", "Playback", ADAU1701_AUXNPOW, 0, 1),
	SND_SOC_DAPM_ADC("ADC", "Capture", ADAU1701_AUXNPOW, 7, 1),

	SND_SOC_DAPM_OUTPUT("OUT0"),
	SND_SOC_DAPM_OUTPUT("OUT1"),
	SND_SOC_DAPM_OUTPUT("OUT2"),
	SND_SOC_DAPM_OUTPUT("OUT3"),
	SND_SOC_DAPM_INPUT("IN0"),
	SND_SOC_DAPM_INPUT("IN1"),
};

static const struct snd_soc_dapm_route adau1701_dapm_routes[] = {
	{ "OUT0", NULL, "DAC0" },
	{ "OUT1", NULL, "DAC1" },
	{ "OUT2", NULL, "DAC2" },
	{ "OUT3", NULL, "DAC3" },

	{ "ADC", NULL, "IN0" },
	{ "ADC", NULL, "IN1" },
};

static unsigned int adau1701_register_size(struct snd_soc_codec *codec,
		unsigned int reg)
{
	switch (reg) {
	case ADAU1701_DSPCTRL:
	case ADAU1701_SEROCTL:
	case ADAU1701_AUXNPOW:
	case ADAU1701_OSCIPOW:
	case ADAU1701_DACSET:
		return 2;
	case ADAU1701_SERICTL:
		return 1;
	}

	dev_err(codec->dev, "Unsupported register address: %d\n", reg);
	return 0;
}

static int adau1701_write(struct snd_soc_codec *codec, unsigned int reg,
		unsigned int value)
{
	unsigned int i;
	unsigned int size;
	uint8_t buf[4];
	int ret;

	size = adau1701_register_size(codec, reg);
	if (size == 0)
		return -EINVAL;

	snd_soc_cache_write(codec, reg, value);

	buf[0] = 0x08;
	buf[1] = reg;

	for (i = size + 1; i >= 2; --i) {
		buf[i] = value;
		value >>= 8;
	}

	ret = i2c_master_send(to_i2c_client(codec->dev), buf, size + 2);
	if (ret == size + 2)
		return 0;
	else if (ret < 0)
		return ret;
	else
		return -EIO;
}

static unsigned int adau1701_read(struct snd_soc_codec *codec, unsigned int reg)
{
	unsigned int value;
	unsigned int ret;

	ret = snd_soc_cache_read(codec, reg, &value);
	if (ret)
		return ret;

	return value;
}

static int adau1701_load_firmware(struct snd_soc_codec *codec)
{
	return process_sigma_firmware(codec->control_data, ADAU1701_FIRMWARE);
}

static int adau1701_set_capture_pcm_format(struct snd_soc_codec *codec,
		snd_pcm_format_t format)
{
	struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
	unsigned int mask = ADAU1701_SEROCTL_WORD_LEN_MASK;
	unsigned int val;

	switch (format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		val = ADAU1701_SEROCTL_WORD_LEN_16;
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		val = ADAU1701_SEROCTL_WORD_LEN_20;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		val = ADAU1701_SEROCTL_WORD_LEN_24;
		break;
	default:
		return -EINVAL;
	}

	if (adau1701->dai_fmt == SND_SOC_DAIFMT_RIGHT_J) {
		switch (format) {
		case SNDRV_PCM_FORMAT_S16_LE:
			val |= ADAU1701_SEROCTL_MSB_DEALY16;
			break;
		case SNDRV_PCM_FORMAT_S20_3LE:
			val |= ADAU1701_SEROCTL_MSB_DEALY12;
			break;
		case SNDRV_PCM_FORMAT_S24_LE:
			val |= ADAU1701_SEROCTL_MSB_DEALY8;
			break;
		}
		mask |= ADAU1701_SEROCTL_MSB_DEALY_MASK;
	}

	snd_soc_update_bits(codec, ADAU1701_SEROCTL, mask, val);

	return 0;
}

static int adau1701_set_playback_pcm_format(struct snd_soc_codec *codec,
			snd_pcm_format_t format)
{
	struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
	unsigned int val;

	if (adau1701->dai_fmt != SND_SOC_DAIFMT_RIGHT_J)
		return 0;

	switch (format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		val = ADAU1701_SERICTL_RIGHTJ_16;
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		val = ADAU1701_SERICTL_RIGHTJ_20;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		val = ADAU1701_SERICTL_RIGHTJ_24;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_update_bits(codec, ADAU1701_SERICTL,
		ADAU1701_SERICTL_MODE_MASK, val);

	return 0;
}

static int adau1701_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;
	snd_pcm_format_t format;
	unsigned int val;

	switch (params_rate(params)) {
	case 192000:
		val = ADAU1701_DSPCTRL_SR_192;
		break;
	case 96000:
		val = ADAU1701_DSPCTRL_SR_96;
		break;
	case 48000:
		val = ADAU1701_DSPCTRL_SR_48;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_update_bits(codec, ADAU1701_DSPCTRL,
		ADAU1701_DSPCTRL_SR_MASK, val);

	format = params_format(params);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		return adau1701_set_playback_pcm_format(codec, format);
	else
		return adau1701_set_capture_pcm_format(codec, format);
}

static int adau1701_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
	unsigned int serictl = 0x00, seroctl = 0x00;
	bool invert_lrclk;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		/* master, 64-bits per sample, 1 frame per sample */
		seroctl |= ADAU1701_SEROCTL_MASTER | ADAU1701_SEROCTL_OBF16
				| ADAU1701_SEROCTL_OLF1024;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	/* clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		invert_lrclk = false;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		invert_lrclk = true;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		invert_lrclk = false;
		serictl |= ADAU1701_SERICTL_INV_BCLK;
		seroctl |= ADAU1701_SEROCTL_INV_BCLK;
		break;
	case SND_SOC_DAIFMT_IB_IF:
		invert_lrclk = true;
		serictl |= ADAU1701_SERICTL_INV_BCLK;
		seroctl |= ADAU1701_SEROCTL_INV_BCLK;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		serictl |= ADAU1701_SERICTL_LEFTJ;
		seroctl |= ADAU1701_SEROCTL_MSB_DEALY0;
		invert_lrclk = !invert_lrclk;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		serictl |= ADAU1701_SERICTL_RIGHTJ_24;
		seroctl |= ADAU1701_SEROCTL_MSB_DEALY8;
		invert_lrclk = !invert_lrclk;
		break;
	default:
		return -EINVAL;
	}

	if (invert_lrclk) {
		seroctl |= ADAU1701_SEROCTL_INV_LRCLK;
		serictl |= ADAU1701_SERICTL_INV_LRCLK;
	}

	adau1701->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;

	snd_soc_write(codec, ADAU1701_SERICTL, serictl);
	snd_soc_update_bits(codec, ADAU1701_SEROCTL,
		~ADAU1701_SEROCTL_WORD_LEN_MASK, seroctl);

	return 0;
}

static int adau1701_set_bias_level(struct snd_soc_codec *codec,
		enum snd_soc_bias_level level)
{
	unsigned int mask = ADAU1701_AUXNPOW_VBPD | ADAU1701_AUXNPOW_VRPD;

	switch (level) {
	case SND_SOC_BIAS_ON:
		break;
	case SND_SOC_BIAS_PREPARE:
		break;
	case SND_SOC_BIAS_STANDBY:
		/* Enable VREF and VREF buffer */
		snd_soc_update_bits(codec, ADAU1701_AUXNPOW, mask, 0x00);
		break;
	case SND_SOC_BIAS_OFF:
		/* Disable VREF and VREF buffer */
		snd_soc_update_bits(codec, ADAU1701_AUXNPOW, mask, mask);
		break;
	}

	codec->dapm.bias_level = level;
	return 0;
}

static int adau1701_digital_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	unsigned int mask = ADAU1701_DSPCTRL_DAM;
	unsigned int val;

	if (mute)
		val = 0;
	else
		val = mask;

	snd_soc_update_bits(codec, ADAU1701_DSPCTRL, mask, val);

	return 0;
}

static int adau1701_set_sysclk(struct snd_soc_codec *codec, int clk_id,
	int source, unsigned int freq, int dir)
{
	unsigned int val;

	switch (clk_id) {
	case ADAU1701_CLK_SRC_OSC:
		val = 0x0;
		break;
	case ADAU1701_CLK_SRC_MCLK:
		val = ADAU1701_OSCIPOW_OPD;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_update_bits(codec, ADAU1701_OSCIPOW, ADAU1701_OSCIPOW_OPD, val);

	return 0;
}

#define ADAU1701_RATES (SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \
	SNDRV_PCM_RATE_192000)

#define ADAU1701_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
	SNDRV_PCM_FMTBIT_S24_LE)

static const struct snd_soc_dai_ops adau1701_dai_ops = {
	.set_fmt	= adau1701_set_dai_fmt,
	.hw_params	= adau1701_hw_params,
	.digital_mute	= adau1701_digital_mute,
};

static struct snd_soc_dai_driver adau1701_dai = {
	.name = "adau1701",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 8,
		.rates = ADAU1701_RATES,
		.formats = ADAU1701_FORMATS,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 8,
		.rates = ADAU1701_RATES,
		.formats = ADAU1701_FORMATS,
	},
	.ops = &adau1701_dai_ops,
	.symmetric_rates = 1,
};

static int adau1701_probe(struct snd_soc_codec *codec)
{
	int ret;

	codec->control_data = to_i2c_client(codec->dev);

	ret = adau1701_load_firmware(codec);
	if (ret)
		dev_warn(codec->dev, "Failed to load firmware\n");

	snd_soc_write(codec, ADAU1701_DACSET, ADAU1701_DACSET_DACINIT);
	snd_soc_write(codec, ADAU1701_DSPCTRL, ADAU1701_DSPCTRL_CR);

	return 0;
}

static struct snd_soc_codec_driver adau1701_codec_drv = {
	.probe			= adau1701_probe,
	.set_bias_level		= adau1701_set_bias_level,
	.idle_bias_off		= true,

	.reg_cache_size		= ADAU1701_NUM_REGS,
	.reg_word_size		= sizeof(u16),

	.controls		= adau1701_controls,
	.num_controls		= ARRAY_SIZE(adau1701_controls),
	.dapm_widgets		= adau1701_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(adau1701_dapm_widgets),
	.dapm_routes		= adau1701_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(adau1701_dapm_routes),

	.write			= adau1701_write,
	.read			= adau1701_read,

	.set_sysclk		= adau1701_set_sysclk,
};

static __devinit int adau1701_i2c_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
{
	struct adau1701 *adau1701;
	int ret;

	adau1701 = devm_kzalloc(&client->dev, sizeof(*adau1701), GFP_KERNEL);
	if (!adau1701)
		return -ENOMEM;

	i2c_set_clientdata(client, adau1701);
	ret = snd_soc_register_codec(&client->dev, &adau1701_codec_drv,
			&adau1701_dai, 1);
	return ret;
}

static __devexit int adau1701_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	return 0;
}

static const struct i2c_device_id adau1701_i2c_id[] = {
	{ "adau1701", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, adau1701_i2c_id);

static struct i2c_driver adau1701_i2c_driver = {
	.driver = {
		.name	= "adau1701",
		.owner	= THIS_MODULE,
	},
	.probe		= adau1701_i2c_probe,
	.remove		= __devexit_p(adau1701_i2c_remove),
	.id_table	= adau1701_i2c_id,
};

static int __init adau1701_init(void)
{
	return i2c_add_driver(&adau1701_i2c_driver);
}
module_init(adau1701_init);

static void __exit adau1701_exit(void)
{
	i2c_del_driver(&adau1701_i2c_driver);
}
module_exit(adau1701_exit);

MODULE_DESCRIPTION("ASoC ADAU1701 SigmaDSP driver");
MODULE_AUTHOR("Cliff Cai <cliff.cai@analog.com>");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL");