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