summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/wl1273.c
blob: a854989829911a62eae6fdf3cf3336b917f748c4 (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
/*
 * ALSA SoC WL1273 codec driver
 *
 * Author:      Matti Aaltonen, <matti.j.aaltonen@nokia.com>
 *
 * Copyright:   (C) 2010, 2011 Nokia Corporation
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/mfd/wl1273-core.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>

#include "wl1273.h"

enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };

/* codec private data */
struct wl1273_priv {
	enum wl1273_mode mode;
	struct wl1273_core *core;
	unsigned int channels;
};

static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
				      int rate, int width)
{
	struct device *dev = &core->client->dev;
	int r = 0;
	u16 mode;

	dev_dbg(dev, "rate: %d\n", rate);
	dev_dbg(dev, "width: %d\n", width);

	mutex_lock(&core->lock);

	mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;

	switch (rate) {
	case 48000:
		mode |= WL1273_IS2_RATE_48K;
		break;
	case 44100:
		mode |= WL1273_IS2_RATE_44_1K;
		break;
	case 32000:
		mode |= WL1273_IS2_RATE_32K;
		break;
	case 22050:
		mode |= WL1273_IS2_RATE_22_05K;
		break;
	case 16000:
		mode |= WL1273_IS2_RATE_16K;
		break;
	case 12000:
		mode |= WL1273_IS2_RATE_12K;
		break;
	case 11025:
		mode |= WL1273_IS2_RATE_11_025;
		break;
	case 8000:
		mode |= WL1273_IS2_RATE_8K;
		break;
	default:
		dev_err(dev, "Sampling rate: %d not supported\n", rate);
		r = -EINVAL;
		goto out;
	}

	switch (width) {
	case 16:
		mode |= WL1273_IS2_WIDTH_32;
		break;
	case 20:
		mode |= WL1273_IS2_WIDTH_40;
		break;
	case 24:
		mode |= WL1273_IS2_WIDTH_48;
		break;
	case 25:
		mode |= WL1273_IS2_WIDTH_50;
		break;
	case 30:
		mode |= WL1273_IS2_WIDTH_60;
		break;
	case 32:
		mode |= WL1273_IS2_WIDTH_64;
		break;
	case 40:
		mode |= WL1273_IS2_WIDTH_80;
		break;
	case 48:
		mode |= WL1273_IS2_WIDTH_96;
		break;
	case 64:
		mode |= WL1273_IS2_WIDTH_128;
		break;
	default:
		dev_err(dev, "Data width: %d not supported\n", width);
		r = -EINVAL;
		goto out;
	}

	dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n",  WL1273_I2S_DEF_MODE);
	dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
	dev_dbg(dev, "mode: 0x%04x\n", mode);

	if (core->i2s_mode != mode) {
		r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
		if (r)
			goto out;

		core->i2s_mode = mode;
		r = core->write(core, WL1273_AUDIO_ENABLE,
				WL1273_AUDIO_ENABLE_I2S);
		if (r)
			goto out;
	}
out:
	mutex_unlock(&core->lock);

	return r;
}

static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
					    int channel_number)
{
	struct device *dev = &core->client->dev;
	int r = 0;

	dev_dbg(dev, "%s\n", __func__);

	mutex_lock(&core->lock);

	if (core->channel_number == channel_number)
		goto out;

	if (channel_number == 1 && core->mode == WL1273_MODE_RX)
		r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
	else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
		r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
	else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
		r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
	else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
		r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
	else
		r = -EINVAL;
out:
	mutex_unlock(&core->lock);

	return r;
}

static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	ucontrol->value.integer.value[0] = wl1273->mode;

	return 0;
}

/*
 * TODO: Implement the audio routing in the driver. Now this control
 * only indicates the setting that has been done elsewhere (in the user
 * space).
 */
static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };

static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	if (wl1273->mode == ucontrol->value.integer.value[0])
		return 0;

	/* Do not allow changes while stream is running */
	if (codec->active)
		return -EPERM;

	if (ucontrol->value.integer.value[0] < 0 ||
	    ucontrol->value.integer.value[0] >=  ARRAY_SIZE(wl1273_audio_route))
		return -EINVAL;

	wl1273->mode = ucontrol->value.integer.value[0];

	return 1;
}

static const struct soc_enum wl1273_enum =
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);

static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
				   struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	dev_dbg(codec->dev, "%s: enter.\n", __func__);

	ucontrol->value.integer.value[0] = wl1273->core->audio_mode;

	return 0;
}

static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
				   struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
	int val, r = 0;

	dev_dbg(codec->dev, "%s: enter.\n", __func__);

	val = ucontrol->value.integer.value[0];
	if (wl1273->core->audio_mode == val)
		return 0;

	r = wl1273->core->set_audio(wl1273->core, val);
	if (r < 0)
		return r;

	return 1;
}

static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };

static const struct soc_enum wl1273_audio_enum =
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
			    wl1273_audio_strings);

static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	dev_dbg(codec->dev, "%s: enter.\n", __func__);

	ucontrol->value.integer.value[0] = wl1273->core->volume;

	return 0;
}

static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
	int r;

	dev_dbg(codec->dev, "%s: enter.\n", __func__);

	r = wl1273->core->set_volume(wl1273->core,
				     ucontrol->value.integer.value[0]);
	if (r)
		return r;

	return 1;
}

static const struct snd_kcontrol_new wl1273_controls[] = {
	SOC_ENUM_EXT("Codec Mode", wl1273_enum,
		     snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
	SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
		     snd_wl1273_fm_audio_get,  snd_wl1273_fm_audio_put),
	SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
		       snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
};

static int wl1273_startup(struct snd_pcm_substream *substream,
			  struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	switch (wl1273->mode) {
	case WL1273_MODE_BT:
		snd_pcm_hw_constraint_minmax(substream->runtime,
					     SNDRV_PCM_HW_PARAM_RATE,
					     8000, 8000);
		snd_pcm_hw_constraint_minmax(substream->runtime,
					     SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
		break;
	case WL1273_MODE_FM_RX:
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
			pr_err("Cannot play in RX mode.\n");
			return -EINVAL;
		}
		break;
	case WL1273_MODE_FM_TX:
		if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
			pr_err("Cannot capture in TX mode.\n");
			return -EINVAL;
		}
		break;
	default:
		return -EINVAL;
		break;
	}

	return 0;
}

static int wl1273_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 wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(rtd->codec);
	struct wl1273_core *core = wl1273->core;
	unsigned int rate, width, r;

	if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
		pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
		return -EINVAL;
	}

	rate = params_rate(params);
	width =  hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;

	if (wl1273->mode == WL1273_MODE_BT) {
		if (rate != 8000) {
			pr_err("Rate %d not supported.\n", params_rate(params));
			return -EINVAL;
		}

		if (params_channels(params) != 1) {
			pr_err("Only mono supported.\n");
			return -EINVAL;
		}

		return 0;
	}

	if (wl1273->mode == WL1273_MODE_FM_TX &&
	    substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		pr_err("Only playback supported with TX.\n");
		return -EINVAL;
	}

	if (wl1273->mode == WL1273_MODE_FM_RX  &&
	    substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		pr_err("Only capture supported with RX.\n");
		return -EINVAL;
	}

	if (wl1273->mode != WL1273_MODE_FM_RX  &&
	    wl1273->mode != WL1273_MODE_FM_TX) {
		pr_err("Unexpected mode: %d.\n", wl1273->mode);
		return -EINVAL;
	}

	r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
	if (r)
		return r;

	wl1273->channels = params_channels(params);
	r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
	if (r)
		return r;

	return 0;
}

static struct snd_soc_dai_ops wl1273_dai_ops = {
	.startup	= wl1273_startup,
	.hw_params	= wl1273_hw_params,
};

static struct snd_soc_dai_driver wl1273_dai = {
	.name = "wl1273-fm",
	.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 = &wl1273_dai_ops,
};

/* Audio interface format for the soc_card driver */
int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
{
	struct wl1273_priv *wl1273;

	if (codec == NULL || fmt == NULL)
		return -EINVAL;

	wl1273 = snd_soc_codec_get_drvdata(codec);

	switch (wl1273->mode) {
	case WL1273_MODE_FM_RX:
	case WL1273_MODE_FM_TX:
		*fmt =	SND_SOC_DAIFMT_I2S |
			SND_SOC_DAIFMT_NB_NF |
			SND_SOC_DAIFMT_CBM_CFM;

		break;
	case WL1273_MODE_BT:
		*fmt =	SND_SOC_DAIFMT_DSP_A |
			SND_SOC_DAIFMT_IB_NF |
			SND_SOC_DAIFMT_CBM_CFM;

		break;
	default:
		return -EINVAL;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(wl1273_get_format);

static int wl1273_probe(struct snd_soc_codec *codec)
{
	struct wl1273_core **core = codec->dev->platform_data;
	struct wl1273_priv *wl1273;
	int r;

	dev_dbg(codec->dev, "%s.\n", __func__);

	if (!core) {
		dev_err(codec->dev, "Platform data is missing.\n");
		return -EINVAL;
	}

	wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
	if (wl1273 == NULL) {
		dev_err(codec->dev, "Cannot allocate memory.\n");
		return -ENOMEM;
	}

	wl1273->mode = WL1273_MODE_BT;
	wl1273->core = *core;

	snd_soc_codec_set_drvdata(codec, wl1273);

	r = snd_soc_add_controls(codec, wl1273_controls,
				 ARRAY_SIZE(wl1273_controls));
	if (r)
		kfree(wl1273);

	return r;
}

static int wl1273_remove(struct snd_soc_codec *codec)
{
	struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);

	dev_dbg(codec->dev, "%s\n", __func__);
	kfree(wl1273);

	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
	.probe = wl1273_probe,
	.remove = wl1273_remove,
};

static int __devinit wl1273_platform_probe(struct platform_device *pdev)
{
	return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
				      &wl1273_dai, 1);
}

static int __devexit wl1273_platform_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
}

MODULE_ALIAS("platform:wl1273-codec");

static struct platform_driver wl1273_platform_driver = {
	.driver		= {
		.name	= "wl1273-codec",
		.owner	= THIS_MODULE,
	},
	.probe		= wl1273_platform_probe,
	.remove		= __devexit_p(wl1273_platform_remove),
};

static int __init wl1273_init(void)
{
	return platform_driver_register(&wl1273_platform_driver);
}
module_init(wl1273_init);

static void __exit wl1273_exit(void)
{
	platform_driver_unregister(&wl1273_platform_driver);
}
module_exit(wl1273_exit);

MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
MODULE_DESCRIPTION("ASoC WL1273 codec driver");
MODULE_LICENSE("GPL");