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
  45 static int corgi_jack_func;
  46 static int corgi_spk_func;
  47
  48 static void corgi_ext_control(struct snd_soc_codec *codec)
  49 {
  50         struct snd_soc_dapm_context *dapm = &codec->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(dapm, "Mic Jack");
  59                 snd_soc_dapm_disable_pin(dapm, "Line Jack");
  60                 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
  61                 snd_soc_dapm_disable_pin(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(dapm, "Mic Jack");
  68                 snd_soc_dapm_disable_pin(dapm, "Line Jack");
  69                 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
  70                 snd_soc_dapm_disable_pin(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(dapm, "Mic Jack");
  76                 snd_soc_dapm_enable_pin(dapm, "Line Jack");
  77                 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
  78                 snd_soc_dapm_disable_pin(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(dapm, "Mic Jack");
  84                 snd_soc_dapm_disable_pin(dapm, "Line Jack");
  85                 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
  86                 snd_soc_dapm_enable_pin(dapm, "Headset Jack");
  87                 break;
  88         }
  89
  90         if (corgi_spk_func == CORGI_SPK_ON)
  91                 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
  92         else
  93                 snd_soc_dapm_disable_pin(dapm, "Ext Spk");
  94
  95         /* signal a DAPM event */
  96         snd_soc_dapm_sync(dapm);
  97 }
  98
  99 static int corgi_startup(struct snd_pcm_substream *substream)
 100 {
 101         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 102         struct snd_soc_codec *codec = rtd->codec;
 103
 104         mutex_lock(&codec->mutex);
 105
 106         /* check the jack status at stream startup */
 107         corgi_ext_control(codec);
 108
 109         mutex_unlock(&codec->mutex);
 110
 111         return 0;
 112 }
 113
 114 /* we need to unmute the HP at shutdown as the mute burns power on corgi */
 115 static void corgi_shutdown(struct snd_pcm_substream *substream)
 116 {
 117         /* set = unmute headphone */
 118         gpio_set_value(CORGI_GPIO_MUTE_L, 1);
 119         gpio_set_value(CORGI_GPIO_MUTE_R, 1);
 120 }
 121
 122 static int corgi_hw_params(struct snd_pcm_substream *substream,
 123         struct snd_pcm_hw_params *params)
 124 {
 125         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 126         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 127         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 128         unsigned int clk = 0;
 129         int ret = 0;
 130
 131         switch (params_rate(params)) {
 132         case 8000:
 133         case 16000:
 134         case 48000:
 135         case 96000:
 136                 clk = 12288000;
 137                 break;
 138         case 11025:
 139         case 22050:
 140         case 44100:
 141                 clk = 11289600;
 142                 break;
 143         }
 144
 145         /* set the codec system clock for DAC and ADC */
 146         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
 147                 SND_SOC_CLOCK_IN);
 148         if (ret < 0)
 149                 return ret;
 150
 151         /* set the I2S system clock as input (unused) */
 152         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 153                 SND_SOC_CLOCK_IN);
 154         if (ret < 0)
 155                 return ret;
 156
 157         return 0;
 158 }
 159
 160 static struct snd_soc_ops corgi_ops = {
 161         .startup = corgi_startup,
 162         .hw_params = corgi_hw_params,
 163         .shutdown = corgi_shutdown,
 164 };
 165
 166 static int corgi_get_jack(struct snd_kcontrol *kcontrol,
 167         struct snd_ctl_elem_value *ucontrol)
 168 {
 169         ucontrol->value.integer.value[0] = corgi_jack_func;
 170         return 0;
 171 }
 172
 173 static int corgi_set_jack(struct snd_kcontrol *kcontrol,
 174         struct snd_ctl_elem_value *ucontrol)
 175 {
 176         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 177
 178         if (corgi_jack_func == ucontrol->value.integer.value[0])
 179                 return 0;
 180
 181         corgi_jack_func = ucontrol->value.integer.value[0];
 182         corgi_ext_control(codec);
 183         return 1;
 184 }
 185
 186 static int corgi_get_spk(struct snd_kcontrol *kcontrol,
 187         struct snd_ctl_elem_value *ucontrol)
 188 {
 189         ucontrol->value.integer.value[0] = corgi_spk_func;
 190         return 0;
 191 }
 192
 193 static int corgi_set_spk(struct snd_kcontrol *kcontrol,
 194         struct snd_ctl_elem_value *ucontrol)
 195 {
 196         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 197
 198         if (corgi_spk_func == ucontrol->value.integer.value[0])
 199                 return 0;
 200
 201         corgi_spk_func = ucontrol->value.integer.value[0];
 202         corgi_ext_control(codec);
 203         return 1;
 204 }
 205
 206 static int corgi_amp_event(struct snd_soc_dapm_widget *w,
 207         struct snd_kcontrol *k, int event)
 208 {
 209         gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
 210         return 0;
 211 }
 212
 213 static int corgi_mic_event(struct snd_soc_dapm_widget *w,
 214         struct snd_kcontrol *k, int event)
 215 {
 216         gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
 217         return 0;
 218 }
 219
 220 /* corgi machine dapm widgets */
 221 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 222 SND_SOC_DAPM_HP("Headphone Jack", NULL),
 223 SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
 224 SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
 225 SND_SOC_DAPM_LINE("Line Jack", NULL),
 226 SND_SOC_DAPM_HP("Headset Jack", NULL),
 227 };
 228
 229 /* Corgi machine audio map (connections to the codec pins) */
 230 static const struct snd_soc_dapm_route corgi_audio_map[] = {
 231
 232         /* headset Jack  - in = micin, out = LHPOUT*/
 233         {"Headset Jack", NULL, "LHPOUT"},
 234
 235         /* headphone connected to LHPOUT1, RHPOUT1 */
 236         {"Headphone Jack", NULL, "LHPOUT"},
 237         {"Headphone Jack", NULL, "RHPOUT"},
 238
 239         /* speaker connected to LOUT, ROUT */
 240         {"Ext Spk", NULL, "ROUT"},
 241         {"Ext Spk", NULL, "LOUT"},
 242
 243         /* mic is connected to MICIN (via right channel of headphone jack) */
 244         {"MICIN", NULL, "Mic Jack"},
 245
 246         /* Same as the above but no mic bias for line signals */
 247         {"MICIN", NULL, "Line Jack"},
 248 };
 249
 250 static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
 251         "Off"};
 252 static const char *spk_function[] = {"On", "Off"};
 253 static const struct soc_enum corgi_enum[] = {
 254         SOC_ENUM_SINGLE_EXT(5, jack_function),
 255         SOC_ENUM_SINGLE_EXT(2, spk_function),
 256 };
 257
 258 static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
 259         SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
 260                 corgi_set_jack),
 261         SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
 262                 corgi_set_spk),
 263 };
 264
 265 /*
 266  * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 267  */
 268 static int corgi_wm8731_init(struct snd_soc_pcm_runtime *rtd)
 269 {
 270         struct snd_soc_codec *codec = rtd->codec;
 271         struct snd_soc_dapm_context *dapm = &codec->dapm;
 272
 273         snd_soc_dapm_nc_pin(dapm, "LLINEIN");
 274         snd_soc_dapm_nc_pin(dapm, "RLINEIN");
 275
 276         return 0;
 277 }
 278
 279 /* corgi digital audio interface glue - connects codec <--> CPU */
 280 static struct snd_soc_dai_link corgi_dai = {
 281         .name = "WM8731",
 282         .stream_name = "WM8731",
 283         .cpu_dai_name = "pxa2xx-i2s",
 284         .codec_dai_name = "wm8731-hifi",
 285         .platform_name = "pxa-pcm-audio",
 286         .codec_name = "wm8731.0-001b",
 287         .init = corgi_wm8731_init,
 288         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 289                    SND_SOC_DAIFMT_CBS_CFS,
 290         .ops = &corgi_ops,
 291 };
 292
 293 /* corgi audio machine driver */
 294 static struct snd_soc_card corgi = {
 295         .name = "Corgi",
 296         .owner = THIS_MODULE,
 297         .dai_link = &corgi_dai,
 298         .num_links = 1,
 299
 300         .controls = wm8731_corgi_controls,
 301         .num_controls = ARRAY_SIZE(wm8731_corgi_controls),
 302         .dapm_widgets = wm8731_dapm_widgets,
 303         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 304         .dapm_routes = corgi_audio_map,
 305         .num_dapm_routes = ARRAY_SIZE(corgi_audio_map),
 306 };
 307
 308 static int __devinit corgi_probe(struct platform_device *pdev)
 309 {
 310         struct snd_soc_card *card = &corgi;
 311         int ret;
 312
 313         card->dev = &pdev->dev;
 314
 315         ret = snd_soc_register_card(card);
 316         if (ret)
 317                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 318                         ret);
 319         return ret;
 320 }
 321
 322 static int __devexit corgi_remove(struct platform_device *pdev)
 323 {
 324         struct snd_soc_card *card = platform_get_drvdata(pdev);
 325
 326         snd_soc_unregister_card(card);
 327         return 0;
 328 }
 329
 330 static struct platform_driver corgi_driver = {
 331         .driver         = {
 332                 .name   = "corgi-audio",
 333                 .owner  = THIS_MODULE,
 334         },
 335         .probe          = corgi_probe,
 336         .remove         = __devexit_p(corgi_remove),
 337 };
 338
 339 module_platform_driver(corgi_driver);
 340
 341 /* Module information */
 342 MODULE_AUTHOR("Richard Purdie");
 343 MODULE_DESCRIPTION("ALSA SoC Corgi");
 344 MODULE_LICENSE("GPL");
 345 MODULE_ALIAS("platform:corgi-audio");