aboutsummaryrefslogtreecommitdiff
path: root/sound/soc/s3c24xx/neo1973_gta02_wm8753.c
blob: 6ddd1b3b16b3300492f41edbc5e940b4b2b732b7 (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
/*
 * neo1973_gta02_wm8753.c  --  SoC audio for Openmoko Freerunner(GTA02)
 *
 * Copyright 2007 Openmoko Inc
 * Author: Graeme Gregory <graeme@openmoko.org>
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Author: Graeme Gregory <linux@wolfsonmicro.com>
 * Copyright 2009 Wolfson Microelectronics
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <asm/mach-types.h>

#include <plat/regs-iis.h>

#include <mach/regs-clock.h>
#include <asm/io.h>
#include <mach/gta02.h>
#include "../codecs/wm8753.h"
#include "s3c24xx-pcm.h"
#include "s3c24xx-i2s.h"

static struct snd_soc_card neo1973_gta02;

static int neo1973_gta02_hifi_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
	unsigned int pll_out = 0, bclk = 0;
	int ret = 0;
	unsigned long iis_clkrate;

	iis_clkrate = s3c24xx_i2s_get_clockrate();

	switch (params_rate(params)) {
	case 8000:
	case 16000:
		pll_out = 12288000;
		break;
	case 48000:
		bclk = WM8753_BCLK_DIV_4;
		pll_out = 12288000;
		break;
	case 96000:
		bclk = WM8753_BCLK_DIV_2;
		pll_out = 12288000;
		break;
	case 11025:
		bclk = WM8753_BCLK_DIV_16;
		pll_out = 11289600;
		break;
	case 22050:
		bclk = WM8753_BCLK_DIV_8;
		pll_out = 11289600;
		break;
	case 44100:
		bclk = WM8753_BCLK_DIV_4;
		pll_out = 11289600;
		break;
	case 88200:
		bclk = WM8753_BCLK_DIV_2;
		pll_out = 11289600;
		break;
	}

	/* set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai,
		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
		SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
		return ret;

	/* set cpu DAI configuration */
	ret = snd_soc_dai_set_fmt(cpu_dai,
		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
		SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
		return ret;

	/* set the codec system clock for DAC and ADC */
	ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
		SND_SOC_CLOCK_IN);
	if (ret < 0)
		return ret;

	/* set MCLK division for sample rate */
	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
		S3C2410_IISMOD_32FS);
	if (ret < 0)
		return ret;

	/* set codec BCLK division for sample rate */
	ret = snd_soc_dai_set_clkdiv(codec_dai,
					WM8753_BCLKDIV, bclk);
	if (ret < 0)
		return ret;

	/* set prescaler division for sample rate */
	ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
		S3C24XX_PRESCALE(4, 4));
	if (ret < 0)
		return ret;

	/* codec PLL input is PCLK/4 */
	ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
		iis_clkrate / 4, pll_out);
	if (ret < 0)
		return ret;

	return 0;
}

static int neo1973_gta02_hifi_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;

	/* disable the PLL */
	return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0);
}

/*
 * Neo1973 WM8753 HiFi DAI opserations.
 */
static struct snd_soc_ops neo1973_gta02_hifi_ops = {
	.hw_params = neo1973_gta02_hifi_hw_params,
	.hw_free = neo1973_gta02_hifi_hw_free,
};

static int neo1973_gta02_voice_hw_params(
	struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
	unsigned int pcmdiv = 0;
	int ret = 0;
	unsigned long iis_clkrate;

	iis_clkrate = s3c24xx_i2s_get_clockrate();

	if (params_rate(params) != 8000)
		return -EINVAL;
	if (params_channels(params) != 1)
		return -EINVAL;

	pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */

	/* todo: gg check mode (DSP_B) against CSR datasheet */
	/* set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	/* set the codec system clock for DAC and ADC */
	ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK,
		12288000, SND_SOC_CLOCK_IN);
	if (ret < 0)
		return ret;

	/* set codec PCM division for sample rate */
	ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
					pcmdiv);
	if (ret < 0)
		return ret;

	/* configue and enable PLL for 12.288MHz output */
	ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2,
		iis_clkrate / 4, 12288000);
	if (ret < 0)
		return ret;

	return 0;
}

static int neo1973_gta02_voice_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;

	/* disable the PLL */
	return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0);
}

static struct snd_soc_ops neo1973_gta02_voice_ops = {
	.hw_params = neo1973_gta02_voice_hw_params,
	.hw_free = neo1973_gta02_voice_hw_free,
};

#define LM4853_AMP 1
#define LM4853_SPK 2

static u8 lm4853_state;

/* This has no effect, it exists only to maintain compatibility with
 * existing ALSA state files.
 */
static int lm4853_set_state(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	int val = ucontrol->value.integer.value[0];

	if (val)
		lm4853_state |= LM4853_AMP;
	else
		lm4853_state &= ~LM4853_AMP;

	return 0;
}

static int lm4853_get_state(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.integer.value[0] = lm4853_state & LM4853_AMP;

	return 0;
}

static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	int val = ucontrol->value.integer.value[0];

	if (val) {
		lm4853_state |= LM4853_SPK;
		gpio_set_value(GTA02_GPIO_HP_IN, 0);
	} else {
		lm4853_state &= ~LM4853_SPK;
		gpio_set_value(GTA02_GPIO_HP_IN, 1);
	}

	return 0;
}

static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.integer.value[0] = (lm4853_state & LM4853_SPK) >> 1;

	return 0;
}

static int lm4853_event(struct snd_soc_dapm_widget *w,
			struct snd_kcontrol *k,
			int event)
{
	gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(value));

	return 0;
}

static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
	SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
	SND_SOC_DAPM_LINE("GSM Line Out", NULL),
	SND_SOC_DAPM_LINE("GSM Line In", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Handset Mic", NULL),
	SND_SOC_DAPM_SPK("Handset Spk", NULL),
};


/* example machine audio_mapnections */
static const struct snd_soc_dapm_route audio_map[] = {

	/* Connections to the lm4853 amp */
	{"Stereo Out", NULL, "LOUT1"},
	{"Stereo Out", NULL, "ROUT1"},

	/* Connections to the GSM Module */
	{"GSM Line Out", NULL, "MONO1"},
	{"GSM Line Out", NULL, "MONO2"},
	{"RXP", NULL, "GSM Line In"},
	{"RXN", NULL, "GSM Line In"},

	/* Connections to Headset */
	{"MIC1", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Headset Mic"},

	/* Call Mic */
	{"MIC2", NULL, "Mic Bias"},
	{"MIC2N", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Handset Mic"},

	/* Call Speaker */
	{"Handset Spk", NULL, "LOUT2"},
	{"Handset Spk", NULL, "ROUT2"},

	/* Connect the ALC pins */
	{"ACIN", NULL, "ACOP"},
};

static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
	SOC_DAPM_PIN_SWITCH("Stereo Out"),
	SOC_DAPM_PIN_SWITCH("GSM Line Out"),
	SOC_DAPM_PIN_SWITCH("GSM Line In"),
	SOC_DAPM_PIN_SWITCH("Headset Mic"),
	SOC_DAPM_PIN_SWITCH("Handset Mic"),
	SOC_DAPM_PIN_SWITCH("Handset Spk"),

	/* This has no effect, it exists only to maintain compatibility with
	 * existing ALSA state files.
	 */
	SOC_SINGLE_EXT("Amp State Switch", 6, 0, 1, 0,
		lm4853_get_state,
		lm4853_set_state),
	SOC_SINGLE_EXT("Amp Spk Switch", 7, 0, 1, 0,
		lm4853_get_spk,
		lm4853_set_spk),
};

/*
 * This is an example machine initialisation for a wm8753 connected to a
 * neo1973 GTA02.
 */
static int neo1973_gta02_wm8753_init(struct snd_soc_codec *codec)
{
	int err;

	/* set up NC codec pins */
	snd_soc_dapm_nc_pin(codec, "OUT3");
	snd_soc_dapm_nc_pin(codec, "OUT4");
	snd_soc_dapm_nc_pin(codec, "LINE1");
	snd_soc_dapm_nc_pin(codec, "LINE2");

	/* Add neo1973 gta02 specific widgets */
	snd_soc_dapm_new_controls(codec, wm8753_dapm_widgets,
				  ARRAY_SIZE(wm8753_dapm_widgets));

	/* add neo1973 gta02 specific controls */
	err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
		ARRAY_SIZE(wm8753_neo1973_gta02_controls));

	if (err < 0)
		return err;

	/* set up neo1973 gta02 specific audio path audio_map */
	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

	/* set endpoints to default off mode */
	snd_soc_dapm_disable_pin(codec, "Stereo Out");
	snd_soc_dapm_disable_pin(codec, "GSM Line Out");
	snd_soc_dapm_disable_pin(codec, "GSM Line In");
	snd_soc_dapm_disable_pin(codec, "Headset Mic");
	snd_soc_dapm_disable_pin(codec, "Handset Mic");
	snd_soc_dapm_disable_pin(codec, "Handset Spk");

	snd_soc_dapm_sync(codec);

	return 0;
}

/*
 * BT Codec DAI
 */
static struct snd_soc_dai bt_dai = {
	.name = "Bluetooth",
	.id = 0,
	.playback = {
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.capture = {
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
};

static struct snd_soc_dai_link neo1973_gta02_dai[] = {
{ /* Hifi Playback - for similatious use with voice below */
	.name = "WM8753",
	.stream_name = "WM8753 HiFi",
	.cpu_dai = &s3c24xx_i2s_dai,
	.codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
	.init = neo1973_gta02_wm8753_init,
	.ops = &neo1973_gta02_hifi_ops,
},
{ /* Voice via BT */
	.name = "Bluetooth",
	.stream_name = "Voice",
	.cpu_dai = &bt_dai,
	.codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
	.ops = &neo1973_gta02_voice_ops,
},
};

static struct snd_soc_card neo1973_gta02 = {
	.name = "neo1973-gta02",
	.platform = &s3c24xx_soc_platform,
	.dai_link = neo1973_gta02_dai,
	.num_links = ARRAY_SIZE(neo1973_gta02_dai),
};

static struct snd_soc_device neo1973_gta02_snd_devdata = {
	.card = &neo1973_gta02,
	.codec_dev = &soc_codec_dev_wm8753,
};

static struct platform_device *neo1973_gta02_snd_device;

static int __init neo1973_gta02_init(void)
{
	int ret;

	if (!machine_is_neo1973_gta02()) {
		printk(KERN_INFO
		       "Only GTA02 is supported by this ASoC driver\n");
		return -ENODEV;
	}

	/* register bluetooth DAI here */
	ret = snd_soc_register_dai(&bt_dai);
	if (ret)
		return ret;

	neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
	if (!neo1973_gta02_snd_device)
		return -ENOMEM;

	platform_set_drvdata(neo1973_gta02_snd_device,
			&neo1973_gta02_snd_devdata);
	neo1973_gta02_snd_devdata.dev = &neo1973_gta02_snd_device->dev;
	ret = platform_device_add(neo1973_gta02_snd_device);

	if (ret) {
		platform_device_put(neo1973_gta02_snd_device);
		return ret;
	}

	/* Initialise GPIOs used by amp */
	ret = gpio_request(GTA02_GPIO_HP_IN, "GTA02_HP_IN");
	if (ret) {
		pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_HP_IN);
		goto err_unregister_device;
	}

	ret = gpio_direction_output(GTA02_GPIO_AMP_HP_IN, 1);
	if (ret) {
		pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_HP_IN);
		goto err_free_gpio_hp_in;
	}

	ret = gpio_request(GTA02_GPIO_AMP_SHUT, "GTA02_AMP_SHUT");
	if (ret) {
		pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_AMP_SHUT);
		goto err_free_gpio_hp_in;
	}

	ret = gpio_direction_output(GTA02_GPIO_AMP_SHUT, 1);
	if (ret) {
		pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_AMP_SHUT);
		goto err_free_gpio_amp_shut;
	}

	return 0;

err_free_gpio_amp_shut:
	gpio_free(GTA02_GPIO_AMP_SHUT);
err_free_gpio_hp_in:
	gpio_free(GTA02_GPIO_HP_IN);
err_unregister_device:
	platform_device_unregister(neo1973_gta02_snd_device);
	return ret;
}
module_init(neo1973_gta02_init);

static void __exit neo1973_gta02_exit(void)
{
	snd_soc_unregister_dai(&bt_dai);
	platform_device_unregister(neo1973_gta02_snd_device);
	gpio_free(GTA02_GPIO_HP_IN);
	gpio_free(GTA02_GPIO_AMP_SHUT);
}
module_exit(neo1973_gta02_exit);

/* Module information */
MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
MODULE_LICENSE("GPL");