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
 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 */
 112 static 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
 119 static 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
 157 static const struct snd_soc_ops corgi_ops = {
 158         .startup = corgi_startup,
 159         .hw_params = corgi_hw_params,
 160         .shutdown = corgi_shutdown,
 161 };
 162
 163 static 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
 170 static 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
 183 static 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
 190 static 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
 203 static 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
 210 static 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 */
 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),
 224 };
 225
 226 /* Corgi machine audio map (connections to the codec pins) */
 227 static 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
 247 static const char * const jack_function[] = {"Headphone", "Mic", "Line",
 248         "Headset", "Off"};
 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),
 253 };
 254
 255 static 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 */
 263 static 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 */
 276 static 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
 291 static 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
 305 static struct platform_driver corgi_driver = {
 306         .driver         = {
 307                 .name   = "corgi-audio",
 308                 .pm     = &snd_soc_pm_ops,
 309         },
 310         .probe          = corgi_probe,
 311 };
 312
 313 module_platform_driver(corgi_driver);
 314
 315 /* Module information */
 316 MODULE_AUTHOR("Richard Purdie");
 317 MODULE_DESCRIPTION("ALSA SoC Corgi");
 318 MODULE_LICENSE("GPL");
 319 MODULE_ALIAS("platform:corgi-audio");