aboutsummaryrefslogblamecommitdiffstats
path: root/sound/soc/codecs/ak4642.c
blob: 729859cf6ca8696b0c4f6218d167c9e04fcdbfef (plain) (tree)
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





























                                                                       
                       



























































































































































































































































































































































































































                                                                               

                                                                      























                                                                   
                    


















                                                                   
/*
 * ak4642.c  --  AK4642/AK4643 ALSA Soc Audio driver
 *
 * Copyright (C) 2009 Renesas Solutions Corp.
 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
 *
 * Based on wm8731.c by Richard Purdie
 * Based on ak4535.c by Richard Purdie
 * Based on wm8753.c by Liam Girdwood
 *
 * 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.
 */

/* ** CAUTION **
 *
 * This is very simple driver.
 * It can use headphone output / stereo input only
 *
 * AK4642 is not tested.
 * AK4643 is tested.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>

#include "ak4642.h"

#define AK4642_VERSION "0.0.1"

#define PW_MGMT1	0x00
#define PW_MGMT2	0x01
#define SG_SL1		0x02
#define SG_SL2		0x03
#define MD_CTL1		0x04
#define MD_CTL2		0x05
#define TIMER		0x06
#define ALC_CTL1	0x07
#define ALC_CTL2	0x08
#define L_IVC		0x09
#define L_DVC		0x0a
#define ALC_CTL3	0x0b
#define R_IVC		0x0c
#define R_DVC		0x0d
#define MD_CTL3		0x0e
#define MD_CTL4		0x0f
#define PW_MGMT3	0x10
#define DF_S		0x11
#define FIL3_0		0x12
#define FIL3_1		0x13
#define FIL3_2		0x14
#define FIL3_3		0x15
#define EQ_0		0x16
#define EQ_1		0x17
#define EQ_2		0x18
#define EQ_3		0x19
#define EQ_4		0x1a
#define EQ_5		0x1b
#define FIL1_0		0x1c
#define FIL1_1		0x1d
#define FIL1_2		0x1e
#define FIL1_3		0x1f
#define PW_MGMT4	0x20
#define MD_CTL5		0x21
#define LO_MS		0x22
#define HP_MS		0x23
#define SPK_MS		0x24

#define AK4642_CACHEREGNUM 	0x25

struct snd_soc_codec_device soc_codec_dev_ak4642;

/* codec private data */
struct ak4642_priv {
	struct snd_soc_codec codec;
	unsigned int sysclk;
};

static struct snd_soc_codec *ak4642_codec;

/*
 * ak4642 register cache
 */
static const u16 ak4642_reg[AK4642_CACHEREGNUM] = {
	0x0000, 0x0000, 0x0001, 0x0000,
	0x0002, 0x0000, 0x0000, 0x0000,
	0x00e1, 0x00e1, 0x0018, 0x0000,
	0x00e1, 0x0018, 0x0011, 0x0008,
	0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000,
	0x0000,
};

/*
 * read ak4642 register cache
 */
static inline unsigned int ak4642_read_reg_cache(struct snd_soc_codec *codec,
	unsigned int reg)
{
	u16 *cache = codec->reg_cache;
	if (reg >= AK4642_CACHEREGNUM)
		return -1;
	return cache[reg];
}

/*
 * write ak4642 register cache
 */
static inline void ak4642_write_reg_cache(struct snd_soc_codec *codec,
	u16 reg, unsigned int value)
{
	u16 *cache = codec->reg_cache;
	if (reg >= AK4642_CACHEREGNUM)
		return;

	cache[reg] = value;
}

/*
 * write to the AK4642 register space
 */
static int ak4642_write(struct snd_soc_codec *codec, unsigned int reg,
	unsigned int value)
{
	u8 data[2];

	/* data is
	 *   D15..D8 AK4642 register offset
	 *   D7...D0 register data
	 */
	data[0] = reg & 0xff;
	data[1] = value & 0xff;

	if (codec->hw_write(codec->control_data, data, 2) == 2) {
		ak4642_write_reg_cache(codec, reg, value);
		return 0;
	} else
		return -EIO;
}

static int ak4642_sync(struct snd_soc_codec *codec)
{
	u16 *cache = codec->reg_cache;
	int i, r = 0;

	for (i = 0; i < AK4642_CACHEREGNUM; i++)
		r |= ak4642_write(codec, i, cache[i]);

	return r;
};

static int ak4642_dai_startup(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	struct snd_soc_codec *codec = dai->codec;

	if (is_play) {
		/*
		 * start headphone output
		 *
		 * PLL, Master Mode
		 * Audio I/F Format :MSB justified (ADC & DAC)
		 * Sampling Frequency: 44.1kHz
		 * Digital Volume: −8dB
		 * Bass Boost Level : Middle
		 *
		 * This operation came from example code of
		 * "ASAHI KASEI AK4642" (japanese) manual p97.
		 *
		 * Example code use 0x39, 0x79 value for 0x01 address,
		 * But we need MCKO (0x02) bit now
		 */
		ak4642_write(codec, 0x05, 0x27);
		ak4642_write(codec, 0x0f, 0x09);
		ak4642_write(codec, 0x0e, 0x19);
		ak4642_write(codec, 0x09, 0x91);
		ak4642_write(codec, 0x0c, 0x91);
		ak4642_write(codec, 0x0a, 0x28);
		ak4642_write(codec, 0x0d, 0x28);
		ak4642_write(codec, 0x00, 0x64);
		ak4642_write(codec, 0x01, 0x3b); /* + MCKO bit */
		ak4642_write(codec, 0x01, 0x7b); /* + MCKO bit */
	} else {
		/*
		 * start stereo input
		 *
		 * PLL Master Mode
		 * Audio I/F Format:MSB justified (ADC & DAC)
		 * Sampling Frequency:44.1kHz
		 * Pre MIC AMP:+20dB
		 * MIC Power On
		 * ALC setting:Refer to Table 35
		 * ALC bit=“1”
		 *
		 * This operation came from example code of
		 * "ASAHI KASEI AK4642" (japanese) manual p94.
		 */
		ak4642_write(codec, 0x05, 0x27);
		ak4642_write(codec, 0x02, 0x05);
		ak4642_write(codec, 0x06, 0x3c);
		ak4642_write(codec, 0x08, 0xe1);
		ak4642_write(codec, 0x0b, 0x00);
		ak4642_write(codec, 0x07, 0x21);
		ak4642_write(codec, 0x00, 0x41);
		ak4642_write(codec, 0x10, 0x01);
	}

	return 0;
}

static void ak4642_dai_shutdown(struct snd_pcm_substream *substream,
			       struct snd_soc_dai *dai)
{
	int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	struct snd_soc_codec *codec = dai->codec;

	if (is_play) {
		/* stop headphone output */
		ak4642_write(codec, 0x01, 0x3b);
		ak4642_write(codec, 0x01, 0x0b);
		ak4642_write(codec, 0x00, 0x40);
		ak4642_write(codec, 0x0e, 0x11);
		ak4642_write(codec, 0x0f, 0x08);
	} else {
		/* stop stereo input */
		ak4642_write(codec, 0x00, 0x40);
		ak4642_write(codec, 0x10, 0x00);
		ak4642_write(codec, 0x07, 0x01);
	}
}

static int ak4642_dai_set_sysclk(struct snd_soc_dai *codec_dai,
	int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct ak4642_priv *ak4642 = codec->private_data;

	ak4642->sysclk = freq;
	return 0;
}

static struct snd_soc_dai_ops ak4642_dai_ops = {
	.startup	= ak4642_dai_startup,
	.shutdown	= ak4642_dai_shutdown,
	.set_sysclk	= ak4642_dai_set_sysclk,
};

struct snd_soc_dai ak4642_dai = {
	.name = "AK4642",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE },
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE },
	.ops = &ak4642_dai_ops,
};
EXPORT_SYMBOL_GPL(ak4642_dai);

static int ak4642_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	ak4642_sync(codec);
	return 0;
}

/*
 * initialise the AK4642 driver
 * register the mixer and dsp interfaces with the kernel
 */
static int ak4642_init(struct ak4642_priv *ak4642)
{
	struct snd_soc_codec *codec = &ak4642->codec;
	int ret = 0;

	if (ak4642_codec) {
		dev_err(codec->dev, "Another ak4642 is registered\n");
		return -EINVAL;
	}

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	codec->private_data	= ak4642;
	codec->name		= "AK4642";
	codec->owner		= THIS_MODULE;
	codec->read		= ak4642_read_reg_cache;
	codec->write		= ak4642_write;
	codec->dai		= &ak4642_dai;
	codec->num_dai		= 1;
	codec->hw_write		= (hw_write_t)i2c_master_send;
	codec->reg_cache_size	= ARRAY_SIZE(ak4642_reg);
	codec->reg_cache	= kmemdup(ak4642_reg,
					  sizeof(ak4642_reg), GFP_KERNEL);

	if (!codec->reg_cache)
		return -ENOMEM;

	ak4642_dai.dev = codec->dev;
	ak4642_codec = codec;

	ret = snd_soc_register_codec(codec);
	if (ret) {
		dev_err(codec->dev, "Failed to register codec: %d\n", ret);
		goto reg_cache_err;
	}

	ret = snd_soc_register_dai(&ak4642_dai);
	if (ret) {
		dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
		snd_soc_unregister_codec(codec);
		goto reg_cache_err;
	}

	/*
	 * clock setting
	 *
	 * Audio I/F Format: MSB justified (ADC & DAC)
	 * BICK frequency at Master Mode: 64fs
	 * Input Master Clock Select at PLL Mode: 11.2896MHz
	 * MCKO: Enable
	 * Sampling Frequency: 44.1kHz
	 *
	 * This operation came from example code of
	 * "ASAHI KASEI AK4642" (japanese) manual p89.
	 *
	 * please fix-me
	 */
	ak4642_write(codec, 0x01, 0x08);
	ak4642_write(codec, 0x04, 0x4a);
	ak4642_write(codec, 0x05, 0x27);
	ak4642_write(codec, 0x00, 0x40);
	ak4642_write(codec, 0x01, 0x0b);

	return ret;

reg_cache_err:
	kfree(codec->reg_cache);
	codec->reg_cache = NULL;

	return ret;
}

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static int ak4642_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct ak4642_priv *ak4642;
	struct snd_soc_codec *codec;
	int ret;

	ak4642 = kzalloc(sizeof(struct ak4642_priv), GFP_KERNEL);
	if (!ak4642)
		return -ENOMEM;

	codec = &ak4642->codec;
	codec->dev = &i2c->dev;

	i2c_set_clientdata(i2c, ak4642);
	codec->control_data = i2c;

	ret = ak4642_init(ak4642);
	if (ret < 0)
		printk(KERN_ERR "failed to initialise AK4642\n");

	return ret;
}

static int ak4642_i2c_remove(struct i2c_client *client)
{
	struct ak4642_priv *ak4642 = i2c_get_clientdata(client);

	snd_soc_unregister_dai(&ak4642_dai);
	snd_soc_unregister_codec(&ak4642->codec);
	kfree(ak4642->codec.reg_cache);
	kfree(ak4642);
	ak4642_codec = NULL;

	return 0;
}

static const struct i2c_device_id ak4642_i2c_id[] = {
	{ "ak4642", 0 },
	{ "ak4643", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ak4642_i2c_id);

static struct i2c_driver ak4642_i2c_driver = {
	.driver = {
		.name = "AK4642 I2C Codec",
		.owner = THIS_MODULE,
	},
	.probe		= ak4642_i2c_probe,
	.remove		= ak4642_i2c_remove,
	.id_table	= ak4642_i2c_id,
};

#endif

static int ak4642_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	int ret;

	if (!ak4642_codec) {
		dev_err(&pdev->dev, "Codec device not registered\n");
		return -ENODEV;
	}

	socdev->card->codec = ak4642_codec;

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "ak4642: failed to create pcms\n");
		goto pcm_err;
	}

	dev_info(&pdev->dev, "AK4642 Audio Codec %s", AK4642_VERSION);
	return ret;

pcm_err:
	return ret;

}

/* power down chip */
static int ak4642_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);

	return 0;
}

struct snd_soc_codec_device soc_codec_dev_ak4642 = {
	.probe =	ak4642_probe,
	.remove =	ak4642_remove,
	.resume =	ak4642_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_ak4642);

static int __init ak4642_modinit(void)
{
	int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&ak4642_i2c_driver);
#endif
	return ret;

}
module_init(ak4642_modinit);

static void __exit ak4642_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&ak4642_i2c_driver);
#endif

}
module_exit(ak4642_exit);

MODULE_DESCRIPTION("Soc AK4642 driver");
MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
MODULE_LICENSE("GPL");