LXR linux/sound/soc/pxa/corgi.c

   1/*
   2 * corgi.c  --  SoC audio for Corgi
   3 *
   4 * Copyright 2005 Wolfson Microelectronics PLC.
   5 * Copyright 2005 Openedhand Ltd.
   6 *
   7 * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
   8 *          Richard Purdie <richard@openedhand.com>
   9 *
  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.
  14 */
  15
  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>
  26
  27#include <asm/mach-types.h>
  28#include <mach/corgi.h>
  29#include <mach/audio.h>
  30
  31#include "../codecs/wm8731.h"
  32#include "pxa2xx-i2s.h"
  33
  34#define CORGI_HP        0
  35#define CORGI_MIC       1
  36#define CORGI_LINE      2
  37#define CORGI_HEADSET   3
  38#define CORGI_HP_OFF    4
  39#define CORGI_SPK_ON    0
  40#define CORGI_SPK_OFF   1
  41
  42 /* audio clock in Hz - rounded from 12.235MHz */
  43#define CORGI_AUDIO_CLOCK 12288000
  44
  45static int corgi_jack_func;
  46static int corgi_spk_func;
  47
  48static void corgi_ext_control(struct snd_soc_dapm_context *dapm)
  49{
  50        snd_soc_dapm_mutex_lock(dapm);
  51
  52        /* set up jack connection */
  53        switch (corgi_jack_func) {
  54        case CORGI_HP:
  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");
  62                break;
  63        case CORGI_MIC:
  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");
  71                break;
  72        case CORGI_LINE:
  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");
  79                break;
  80        case CORGI_HEADSET:
  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");
  87                break;
  88        }
  89
  90        if (corgi_spk_func == CORGI_SPK_ON)
  91                snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
  92        else
  93                snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");
  94
  95        /* signal a DAPM event */
  96        snd_soc_dapm_sync_unlocked(dapm);
  97
  98        snd_soc_dapm_mutex_unlock(dapm);
  99}
 100
 101static int corgi_startup(struct snd_pcm_substream *substream)
 102{
 103        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 104
 105        /* check the jack status at stream startup */
 106        corgi_ext_control(&rtd->card->dapm);
 107
 108        return 0;
 109}
 110
 111/* we need to unmute the HP at shutdown as the mute burns power on corgi */
 112static void corgi_shutdown(struct snd_pcm_substream *substream)
 113{
 114        /* set = unmute headphone */
 115        gpio_set_value(CORGI_GPIO_MUTE_L, 1);
 116        gpio_set_value(CORGI_GPIO_MUTE_R, 1);
 117}
 118
 119static int corgi_hw_params(struct snd_pcm_substream *substream,
 120        struct snd_pcm_hw_params *params)
 121{
 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;
 126        int ret = 0;
 127
 128        switch (params_rate(params)) {
 129        case 8000:
 130        case 16000:
 131        case 48000:
 132        case 96000:
 133                clk = 12288000;
 134                break;
 135        case 11025:
 136        case 22050:
 137        case 44100:
 138                clk = 11289600;
 139                break;
 140        }
 141
 142        /* set the codec system clock for DAC and ADC */
 143        ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
 144                SND_SOC_CLOCK_IN);
 145        if (ret < 0)
 146                return ret;
 147
 148        /* set the I2S system clock as input (unused) */
 149        ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 150                SND_SOC_CLOCK_IN);
 151        if (ret < 0)
 152                return ret;
 153
 154        return 0;
 155}
 156
 157static const struct snd_soc_ops corgi_ops = {
 158        .startup = corgi_startup,
 159        .hw_params = corgi_hw_params,
 160        .shutdown = corgi_shutdown,
 161};
 162
 163static int corgi_get_jack(struct snd_kcontrol *kcontrol,
 164        struct snd_ctl_elem_value *ucontrol)
 165{
 166        ucontrol->value.enumerated.item[0] = corgi_jack_func;
 167        return 0;
 168}
 169
 170static int corgi_set_jack(struct snd_kcontrol *kcontrol,
 171        struct snd_ctl_elem_value *ucontrol)
 172{
 173        struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 174
 175        if (corgi_jack_func == ucontrol->value.enumerated.item[0])
 176                return 0;
 177
 178        corgi_jack_func = ucontrol->value.enumerated.item[0];
 179        corgi_ext_control(&card->dapm);
 180        return 1;
 181}
 182
 183static int corgi_get_spk(struct snd_kcontrol *kcontrol,
 184        struct snd_ctl_elem_value *ucontrol)
 185{
 186        ucontrol->value.enumerated.item[0] = corgi_spk_func;
 187        return 0;
 188}
 189
 190static int corgi_set_spk(struct snd_kcontrol *kcontrol,
 191        struct snd_ctl_elem_value *ucontrol)
 192{
 193        struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
 194
 195        if (corgi_spk_func == ucontrol->value.enumerated.item[0])
 196                return 0;
 197
 198        corgi_spk_func = ucontrol->value.enumerated.item[0];
 199        corgi_ext_control(&card->dapm);
 200        return 1;
 201}
 202
 203static int corgi_amp_event(struct snd_soc_dapm_widget *w,
 204        struct snd_kcontrol *k, int event)
 205{
 206        gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
 207        return 0;
 208}
 209
 210static int corgi_mic_event(struct snd_soc_dapm_widget *w,
 211        struct snd_kcontrol *k, int event)
 212{
 213        gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
 214        return 0;
 215}
 216
 217/* corgi machine dapm widgets */
 218static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 219SND_SOC_DAPM_HP("Headphone Jack", NULL),
 220SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
 221SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
 222SND_SOC_DAPM_LINE("Line Jack", NULL),
 223SND_SOC_DAPM_HP("Headset Jack", NULL),
 224};
 225
 226/* Corgi machine audio map (connections to the codec pins) */
 227static const struct snd_soc_dapm_route corgi_audio_map[] = {
 228
 229        /* headset Jack  - in = micin, out = LHPOUT*/
 230        {"Headset Jack", NULL, "LHPOUT"},
 231
 232        /* headphone connected to LHPOUT1, RHPOUT1 */
 233        {"Headphone Jack", NULL, "LHPOUT"},
 234        {"Headphone Jack", NULL, "RHPOUT"},
 235
 236        /* speaker connected to LOUT, ROUT */
 237        {"Ext Spk", NULL, "ROUT"},
 238        {"Ext Spk", NULL, "LOUT"},
 239
 240        /* mic is connected to MICIN (via right channel of headphone jack) */
 241        {"MICIN", NULL, "Mic Jack"},
 242
 243        /* Same as the above but no mic bias for line signals */
 244        {"MICIN", NULL, "Line Jack"},
 245};
 246
 247static const char * const jack_function[] = {"Headphone", "Mic", "Line",
 248        "Headset", "Off"};
 249static const char * const spk_function[] = {"On", "Off"};
 250static const struct soc_enum corgi_enum[] = {
 251        SOC_ENUM_SINGLE_EXT(5, jack_function),
 252        SOC_ENUM_SINGLE_EXT(2, spk_function),
 253};
 254
 255static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
 256        SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
 257                corgi_set_jack),
 258        SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
 259                corgi_set_spk),
 260};
 261
 262/* corgi digital audio interface glue - connects codec <--> CPU */
 263static struct snd_soc_dai_link corgi_dai = {
 264        .name = "WM8731",
 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,
 272        .ops = &corgi_ops,
 273};
 274
 275/* corgi audio machine driver */
 276static struct snd_soc_card corgi = {
 277        .name = "Corgi",
 278        .owner = THIS_MODULE,
 279        .dai_link = &corgi_dai,
 280        .num_links = 1,
 281
 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,
 289};
 290
 291static int corgi_probe(struct platform_device *pdev)
 292{
 293        struct snd_soc_card *card = &corgi;
 294        int ret;
 295
 296        card->dev = &pdev->dev;
 297
 298        ret = devm_snd_soc_register_card(&pdev->dev, card);
 299        if (ret)
 300                dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 301                        ret);
 302        return ret;
 303}
 304
 305static struct platform_driver corgi_driver = {
 306        .driver         = {
 307                .name   = "corgi-audio",
 308                .pm     = &snd_soc_pm_ops,
 309        },
 310        .probe          = corgi_probe,
 311};
 312
 313module_platform_driver(corgi_driver);
 314
 315/* Module information */
 316MODULE_AUTHOR("Richard Purdie");
 317MODULE_DESCRIPTION("ALSA SoC Corgi");
 318MODULE_LICENSE("GPL");
 319MODULE_ALIAS("platform:corgi-audio");
 320