2
* corgi.c -- SoC audio for Corgi
4
* Copyright 2005 Wolfson Microelectronics PLC.
5
* Copyright 2005 Openedhand Ltd.
7
* Authors: Liam Girdwood <lrg@slimlogic.co.uk>
8
* Richard Purdie <richard@openedhand.com>
10
* This program is free software; you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by the
12
* Free Software Foundation; either version 2 of the License, or (at your
13
* option) any later version.
16
#include <linux/module.h>
17
#include <linux/moduleparam.h>
18
#include <linux/timer.h>
19
#include <linux/i2c.h>
20
#include <linux/interrupt.h>
21
#include <linux/platform_device.h>
22
#include <linux/gpio.h>
23
#include <sound/core.h>
24
#include <sound/pcm.h>
25
#include <sound/soc.h>
27
#include <asm/mach-types.h>
28
#include <mach/corgi.h>
29
#include <mach/audio.h>
31
#include "../codecs/wm8731.h"
32
#include "pxa2xx-i2s.h"
37
#define CORGI_HEADSET 3
38
#define CORGI_HP_OFF 4
39
#define CORGI_SPK_ON 0
40
#define CORGI_SPK_OFF 1
42
/* audio clock in Hz - rounded from 12.235MHz */
43
#define CORGI_AUDIO_CLOCK 12288000
45
static int corgi_jack_func;
46
static int corgi_spk_func;
48
static void corgi_ext_control(struct snd_soc_dapm_context *dapm)
50
snd_soc_dapm_mutex_lock(dapm);
52
/* set up jack connection */
53
switch (corgi_jack_func) {
55
/* set = unmute headphone */
56
gpio_set_value(CORGI_GPIO_MUTE_L, 1);
57
gpio_set_value(CORGI_GPIO_MUTE_R, 1);
58
snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
59
snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
60
snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
61
snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
64
/* reset = mute headphone */
65
gpio_set_value(CORGI_GPIO_MUTE_L, 0);
66
gpio_set_value(CORGI_GPIO_MUTE_R, 0);
67
snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
68
snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
69
snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
70
snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
73
gpio_set_value(CORGI_GPIO_MUTE_L, 0);
74
gpio_set_value(CORGI_GPIO_MUTE_R, 0);
75
snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
76
snd_soc_dapm_enable_pin_unlocked(dapm, "Line Jack");
77
snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
78
snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
81
gpio_set_value(CORGI_GPIO_MUTE_L, 0);
82
gpio_set_value(CORGI_GPIO_MUTE_R, 1);
83
snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
84
snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
85
snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
86
snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
90
if (corgi_spk_func == CORGI_SPK_ON)
91
snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
93
snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");
95
/* signal a DAPM event */
96
snd_soc_dapm_sync_unlocked(dapm);
98
snd_soc_dapm_mutex_unlock(dapm);
101
static int corgi_startup(struct snd_pcm_substream *substream)
103
struct snd_soc_pcm_runtime *rtd = substream->private_data;
105
/* check the jack status at stream startup */
106
corgi_ext_control(&rtd->card->dapm);
111
/* we need to unmute the HP at shutdown as the mute burns power on corgi */
112
static void corgi_shutdown(struct snd_pcm_substream *substream)
114
/* set = unmute headphone */
115
gpio_set_value(CORGI_GPIO_MUTE_L, 1);
116
gpio_set_value(CORGI_GPIO_MUTE_R, 1);
119
static int corgi_hw_params(struct snd_pcm_substream *substream,
120
struct snd_pcm_hw_params *params)
122
struct snd_soc_pcm_runtime *rtd = substream->private_data;
123
struct snd_soc_dai *codec_dai = rtd->codec_dai;
124
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
125
unsigned int clk = 0;
128
switch (params_rate(params)) {
142
/* set the codec system clock for DAC and ADC */
143
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
148
/* set the I2S system clock as input (unused) */
149
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
157
static const struct snd_soc_ops corgi_ops = {
158
.startup = corgi_startup,
159
.hw_params = corgi_hw_params,
160
.shutdown = corgi_shutdown,
163
static int corgi_get_jack(struct snd_kcontrol *kcontrol,
164
struct snd_ctl_elem_value *ucontrol)
166
ucontrol->value.enumerated.item[0] = corgi_jack_func;
170
static int corgi_set_jack(struct snd_kcontrol *kcontrol,
171
struct snd_ctl_elem_value *ucontrol)
173
struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
175
if (corgi_jack_func == ucontrol->value.enumerated.item[0])
178
corgi_jack_func = ucontrol->value.enumerated.item[0];
179
corgi_ext_control(&card->dapm);
183
static int corgi_get_spk(struct snd_kcontrol *kcontrol,
184
struct snd_ctl_elem_value *ucontrol)
186
ucontrol->value.enumerated.item[0] = corgi_spk_func;
190
static int corgi_set_spk(struct snd_kcontrol *kcontrol,
191
struct snd_ctl_elem_value *ucontrol)
193
struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
195
if (corgi_spk_func == ucontrol->value.enumerated.item[0])
198
corgi_spk_func = ucontrol->value.enumerated.item[0];
199
corgi_ext_control(&card->dapm);
203
static int corgi_amp_event(struct snd_soc_dapm_widget *w,
204
struct snd_kcontrol *k, int event)
206
gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
210
static int corgi_mic_event(struct snd_soc_dapm_widget *w,
211
struct snd_kcontrol *k, int event)
213
gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
217
/* corgi machine dapm widgets */
218
static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
219
SND_SOC_DAPM_HP("Headphone Jack", NULL),
220
SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
221
SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
222
SND_SOC_DAPM_LINE("Line Jack", NULL),
223
SND_SOC_DAPM_HP("Headset Jack", NULL),
226
/* Corgi machine audio map (connections to the codec pins) */
227
static const struct snd_soc_dapm_route corgi_audio_map[] = {
229
/* headset Jack - in = micin, out = LHPOUT*/
230
{"Headset Jack", NULL, "LHPOUT"},
232
/* headphone connected to LHPOUT1, RHPOUT1 */
233
{"Headphone Jack", NULL, "LHPOUT"},
234
{"Headphone Jack", NULL, "RHPOUT"},
236
/* speaker connected to LOUT, ROUT */
237
{"Ext Spk", NULL, "ROUT"},
238
{"Ext Spk", NULL, "LOUT"},
240
/* mic is connected to MICIN (via right channel of headphone jack) */
241
{"MICIN", NULL, "Mic Jack"},
243
/* Same as the above but no mic bias for line signals */
244
{"MICIN", NULL, "Line Jack"},
247
static const char * const jack_function[] = {"Headphone", "Mic", "Line",
249
static const char * const spk_function[] = {"On", "Off"};
250
static const struct soc_enum corgi_enum[] = {
251
SOC_ENUM_SINGLE_EXT(5, jack_function),
252
SOC_ENUM_SINGLE_EXT(2, spk_function),
255
static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
256
SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
258
SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
262
/* corgi digital audio interface glue - connects codec <--> CPU */
263
static struct snd_soc_dai_link corgi_dai = {
265
.stream_name = "WM8731",
266
.cpu_dai_name = "pxa2xx-i2s",
267
.codec_dai_name = "wm8731-hifi",
268
.platform_name = "pxa-pcm-audio",
269
.codec_name = "wm8731.0-001b",
270
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
271
SND_SOC_DAIFMT_CBS_CFS,
275
/* corgi audio machine driver */
276
static struct snd_soc_card corgi = {
278
.owner = THIS_MODULE,
279
.dai_link = &corgi_dai,
282
.controls = wm8731_corgi_controls,
283
.num_controls = ARRAY_SIZE(wm8731_corgi_controls),
284
.dapm_widgets = wm8731_dapm_widgets,
285
.num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
286
.dapm_routes = corgi_audio_map,
287
.num_dapm_routes = ARRAY_SIZE(corgi_audio_map),
288
.fully_routed = true,
291
static int corgi_probe(struct platform_device *pdev)
293
struct snd_soc_card *card = &corgi;
296
card->dev = &pdev->dev;
298
ret = devm_snd_soc_register_card(&pdev->dev, card);
300
dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
305
static struct platform_driver corgi_driver = {
307
.name = "corgi-audio",
308
.pm = &snd_soc_pm_ops,
310
.probe = corgi_probe,
313
module_platform_driver(corgi_driver);
315
/* Module information */
316
MODULE_AUTHOR("Richard Purdie");
317
MODULE_DESCRIPTION("ALSA SoC Corgi");
318
MODULE_LICENSE("GPL");
319
MODULE_ALIAS("platform:corgi-audio");