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 codec DAI configuration */
 146         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 147                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 148         if (ret < 0)
 149                 return ret;
 150
 151         /* set cpu DAI configuration */
 152         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 153                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 154         if (ret < 0)
 155                 return ret;
 156
 157         /* set the codec system clock for DAC and ADC */
 158         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
 159                 SND_SOC_CLOCK_IN);
 160         if (ret < 0)
 161                 return ret;
 162
 163         /* set the I2S system clock as input (unused) */
 164         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 165                 SND_SOC_CLOCK_IN);
 166         if (ret < 0)
 167                 return ret;
 168
 169         return 0;
 170 }
 171
 172 static struct snd_soc_ops corgi_ops = {
 173         .startup = corgi_startup,
 174         .hw_params = corgi_hw_params,
 175         .shutdown = corgi_shutdown,
 176 };
 177
 178 static int corgi_get_jack(struct snd_kcontrol *kcontrol,
 179         struct snd_ctl_elem_value *ucontrol)
 180 {
 181         ucontrol->value.integer.value[0] = corgi_jack_func;
 182         return 0;
 183 }
 184
 185 static int corgi_set_jack(struct snd_kcontrol *kcontrol,
 186         struct snd_ctl_elem_value *ucontrol)
 187 {
 188         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 189
 190         if (corgi_jack_func == ucontrol->value.integer.value[0])
 191                 return 0;
 192
 193         corgi_jack_func = ucontrol->value.integer.value[0];
 194         corgi_ext_control(codec);
 195         return 1;
 196 }
 197
 198 static int corgi_get_spk(struct snd_kcontrol *kcontrol,
 199         struct snd_ctl_elem_value *ucontrol)
 200 {
 201         ucontrol->value.integer.value[0] = corgi_spk_func;
 202         return 0;
 203 }
 204
 205 static int corgi_set_spk(struct snd_kcontrol *kcontrol,
 206         struct snd_ctl_elem_value *ucontrol)
 207 {
 208         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 209
 210         if (corgi_spk_func == ucontrol->value.integer.value[0])
 211                 return 0;
 212
 213         corgi_spk_func = ucontrol->value.integer.value[0];
 214         corgi_ext_control(codec);
 215         return 1;
 216 }
 217
 218 static int corgi_amp_event(struct snd_soc_dapm_widget *w,
 219         struct snd_kcontrol *k, int event)
 220 {
 221         gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
 222         return 0;
 223 }
 224
 225 static int corgi_mic_event(struct snd_soc_dapm_widget *w,
 226         struct snd_kcontrol *k, int event)
 227 {
 228         gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
 229         return 0;
 230 }
 231
 232 /* corgi machine dapm widgets */
 233 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 234 SND_SOC_DAPM_HP("Headphone Jack", NULL),
 235 SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event),
 236 SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event),
 237 SND_SOC_DAPM_LINE("Line Jack", NULL),
 238 SND_SOC_DAPM_HP("Headset Jack", NULL),
 239 };
 240
 241 /* Corgi machine audio map (connections to the codec pins) */
 242 static const struct snd_soc_dapm_route audio_map[] = {
 243
 244         /* headset Jack  - in = micin, out = LHPOUT*/
 245         {"Headset Jack", NULL, "LHPOUT"},
 246
 247         /* headphone connected to LHPOUT1, RHPOUT1 */
 248         {"Headphone Jack", NULL, "LHPOUT"},
 249         {"Headphone Jack", NULL, "RHPOUT"},
 250
 251         /* speaker connected to LOUT, ROUT */
 252         {"Ext Spk", NULL, "ROUT"},
 253         {"Ext Spk", NULL, "LOUT"},
 254
 255         /* mic is connected to MICIN (via right channel of headphone jack) */
 256         {"MICIN", NULL, "Mic Jack"},
 257
 258         /* Same as the above but no mic bias for line signals */
 259         {"MICIN", NULL, "Line Jack"},
 260 };
 261
 262 static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
 263         "Off"};
 264 static const char *spk_function[] = {"On", "Off"};
 265 static const struct soc_enum corgi_enum[] = {
 266         SOC_ENUM_SINGLE_EXT(5, jack_function),
 267         SOC_ENUM_SINGLE_EXT(2, spk_function),
 268 };
 269
 270 static const struct snd_kcontrol_new wm8731_corgi_controls[] = {
 271         SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack,
 272                 corgi_set_jack),
 273         SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk,
 274                 corgi_set_spk),
 275 };
 276
 277 /*
 278  * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 279  */
 280 static int corgi_wm8731_init(struct snd_soc_pcm_runtime *rtd)
 281 {
 282         struct snd_soc_codec *codec = rtd->codec;
 283         struct snd_soc_dapm_context *dapm = &codec->dapm;
 284         int err;
 285
 286         snd_soc_dapm_nc_pin(dapm, "LLINEIN");
 287         snd_soc_dapm_nc_pin(dapm, "RLINEIN");
 288
 289         /* Add corgi specific controls */
 290         err = snd_soc_add_controls(codec, wm8731_corgi_controls,
 291                                 ARRAY_SIZE(wm8731_corgi_controls));
 292         if (err < 0)
 293                 return err;
 294
 295         /* Add corgi specific widgets */
 296         snd_soc_dapm_new_controls(dapm, wm8731_dapm_widgets,
 297                                   ARRAY_SIZE(wm8731_dapm_widgets));
 298
 299         /* Set up corgi specific audio path audio_map */
 300         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 301
 302         return 0;
 303 }
 304
 305 /* corgi digital audio interface glue - connects codec <--> CPU */
 306 static struct snd_soc_dai_link corgi_dai = {
 307         .name = "WM8731",
 308         .stream_name = "WM8731",
 309         .cpu_dai_name = "pxa2xx-i2s",
 310         .codec_dai_name = "wm8731-hifi",
 311         .platform_name = "pxa-pcm-audio",
 312         .codec_name = "wm8731.0-001b",
 313         .init = corgi_wm8731_init,
 314         .ops = &corgi_ops,
 315 };
 316
 317 /* corgi audio machine driver */
 318 static struct snd_soc_card snd_soc_corgi = {
 319         .name = "Corgi",
 320         .dai_link = &corgi_dai,
 321         .num_links = 1,
 322 };
 323
 324 static struct platform_device *corgi_snd_device;
 325
 326 static int __init corgi_init(void)
 327 {
 328         int ret;
 329
 330         if (!(machine_is_corgi() || machine_is_shepherd() ||
 331               machine_is_husky()))
 332                 return -ENODEV;
 333
 334         corgi_snd_device = platform_device_alloc("soc-audio", -1);
 335         if (!corgi_snd_device)
 336                 return -ENOMEM;
 337
 338         platform_set_drvdata(corgi_snd_device, &snd_soc_corgi);
 339         ret = platform_device_add(corgi_snd_device);
 340
 341         if (ret)
 342                 platform_device_put(corgi_snd_device);
 343
 344         return ret;
 345 }
 346
 347 static void __exit corgi_exit(void)
 348 {
 349         platform_device_unregister(corgi_snd_device);
 350 }
 351
 352 module_init(corgi_init);
 353 module_exit(corgi_exit);
 354
 355 /* Module information */
 356 MODULE_AUTHOR("Richard Purdie");
 357 MODULE_DESCRIPTION("ALSA SoC Corgi");
 358 MODULE_LICENSE("GPL");