sound/soc/pxa/poodle.c

   1 /*
   2  * poodle.c  --  SoC audio for Poodle
   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
  17 #include <linux/module.h>
  18 #include <linux/moduleparam.h>
  19 #include <linux/timer.h>
  20 #include <linux/i2c.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/platform_device.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 <asm/hardware/locomo.h>
  29 #include <mach/poodle.h>
  30 #include <mach/audio.h>
  31
  32 #include "../codecs/wm8731.h"
  33 #include "pxa2xx-i2s.h"
  34
  35 #define POODLE_HP        1
  36 #define POODLE_HP_OFF    0
  37 #define POODLE_SPK_ON    1
  38 #define POODLE_SPK_OFF   0
  39
  40  /* audio clock in Hz - rounded from 12.235MHz */
  41 #define POODLE_AUDIO_CLOCK 12288000
  42
  43 static int poodle_jack_func;
  44 static int poodle_spk_func;
  45
  46 static void poodle_ext_control(struct snd_soc_dapm_context *dapm)
  47 {
  48         /* set up jack connection */
  49         if (poodle_jack_func == POODLE_HP) {
  50                 /* set = unmute headphone */
  51                 locomo_gpio_write(&poodle_locomo_device.dev,
  52                         POODLE_LOCOMO_GPIO_MUTE_L, 1);
  53                 locomo_gpio_write(&poodle_locomo_device.dev,
  54                         POODLE_LOCOMO_GPIO_MUTE_R, 1);
  55                 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
  56         } else {
  57                 locomo_gpio_write(&poodle_locomo_device.dev,
  58                         POODLE_LOCOMO_GPIO_MUTE_L, 0);
  59                 locomo_gpio_write(&poodle_locomo_device.dev,
  60                         POODLE_LOCOMO_GPIO_MUTE_R, 0);
  61                 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
  62         }
  63
  64         /* set the enpoints to their new connetion states */
  65         if (poodle_spk_func == POODLE_SPK_ON)
  66                 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
  67         else
  68                 snd_soc_dapm_disable_pin(dapm, "Ext Spk");
  69
  70         /* signal a DAPM event */
  71         snd_soc_dapm_sync(dapm);
  72 }
  73
  74 static int poodle_startup(struct snd_pcm_substream *substream)
  75 {
  76         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  77
  78         /* check the jack status at stream startup */
  79         poodle_ext_control(&rtd->card->dapm);
  80
  81         return 0;
  82 }
  83
  84 /* we need to unmute the HP at shutdown as the mute burns power on poodle */
  85 static void poodle_shutdown(struct snd_pcm_substream *substream)
  86 {
  87         /* set = unmute headphone */
  88         locomo_gpio_write(&poodle_locomo_device.dev,
  89                 POODLE_LOCOMO_GPIO_MUTE_L, 1);
  90         locomo_gpio_write(&poodle_locomo_device.dev,
  91                 POODLE_LOCOMO_GPIO_MUTE_R, 1);
  92 }
  93
  94 static int poodle_hw_params(struct snd_pcm_substream *substream,
  95         struct snd_pcm_hw_params *params)
  96 {
  97         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  98         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  99         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 100         unsigned int clk = 0;
 101         int ret = 0;
 102
 103         switch (params_rate(params)) {
 104         case 8000:
 105         case 16000:
 106         case 48000:
 107         case 96000:
 108                 clk = 12288000;
 109                 break;
 110         case 11025:
 111         case 22050:
 112         case 44100:
 113                 clk = 11289600;
 114                 break;
 115         }
 116
 117         /* set the codec system clock for DAC and ADC */
 118         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
 119                 SND_SOC_CLOCK_IN);
 120         if (ret < 0)
 121                 return ret;
 122
 123         /* set the I2S system clock as input (unused) */
 124         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 125                 SND_SOC_CLOCK_IN);
 126         if (ret < 0)
 127                 return ret;
 128
 129         return 0;
 130 }
 131
 132 static struct snd_soc_ops poodle_ops = {
 133         .startup = poodle_startup,
 134         .hw_params = poodle_hw_params,
 135         .shutdown = poodle_shutdown,
 136 };
 137
 138 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
 139         struct snd_ctl_elem_value *ucontrol)
 140 {
 141         ucontrol->value.enumerated.item[0] = poodle_jack_func;
 142         return 0;
 143 }
 144
 145 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
 146         struct snd_ctl_elem_value *ucontrol)
 147 {
 148         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
 149
 150         if (poodle_jack_func == ucontrol->value.enumerated.item[0])
 151                 return 0;
 152
 153         poodle_jack_func = ucontrol->value.enumerated.item[0];
 154         poodle_ext_control(&card->dapm);
 155         return 1;
 156 }
 157
 158 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
 159         struct snd_ctl_elem_value *ucontrol)
 160 {
 161         ucontrol->value.enumerated.item[0] = poodle_spk_func;
 162         return 0;
 163 }
 164
 165 static int poodle_set_spk(struct snd_kcontrol *kcontrol,
 166         struct snd_ctl_elem_value *ucontrol)
 167 {
 168         struct snd_soc_card *card =  snd_kcontrol_chip(kcontrol);
 169
 170         if (poodle_spk_func == ucontrol->value.enumerated.item[0])
 171                 return 0;
 172
 173         poodle_spk_func = ucontrol->value.enumerated.item[0];
 174         poodle_ext_control(&card->dapm);
 175         return 1;
 176 }
 177
 178 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
 179         struct snd_kcontrol *k, int event)
 180 {
 181         if (SND_SOC_DAPM_EVENT_ON(event))
 182                 locomo_gpio_write(&poodle_locomo_device.dev,
 183                         POODLE_LOCOMO_GPIO_AMP_ON, 0);
 184         else
 185                 locomo_gpio_write(&poodle_locomo_device.dev,
 186                         POODLE_LOCOMO_GPIO_AMP_ON, 1);
 187
 188         return 0;
 189 }
 190
 191 /* poodle machine dapm widgets */
 192 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 193 SND_SOC_DAPM_HP("Headphone Jack", NULL),
 194 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 195 SND_SOC_DAPM_MIC("Microphone", NULL),
 196 };
 197
 198 /* Corgi machine connections to the codec pins */
 199 static const struct snd_soc_dapm_route poodle_audio_map[] = {
 200
 201         /* headphone connected to LHPOUT1, RHPOUT1 */
 202         {"Headphone Jack", NULL, "LHPOUT"},
 203         {"Headphone Jack", NULL, "RHPOUT"},
 204
 205         /* speaker connected to LOUT, ROUT */
 206         {"Ext Spk", NULL, "ROUT"},
 207         {"Ext Spk", NULL, "LOUT"},
 208
 209         {"MICIN", NULL, "Microphone"},
 210 };
 211
 212 static const char * const jack_function[] = {"Off", "Headphone"};
 213 static const char * const spk_function[] = {"Off", "On"};
 214 static const struct soc_enum poodle_enum[] = {
 215         SOC_ENUM_SINGLE_EXT(2, jack_function),
 216         SOC_ENUM_SINGLE_EXT(2, spk_function),
 217 };
 218
 219 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
 220         SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
 221                 poodle_set_jack),
 222         SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
 223                 poodle_set_spk),
 224 };
 225
 226 /* poodle digital audio interface glue - connects codec <--> CPU */
 227 static struct snd_soc_dai_link poodle_dai = {
 228         .name = "WM8731",
 229         .stream_name = "WM8731",
 230         .cpu_dai_name = "pxa2xx-i2s",
 231         .codec_dai_name = "wm8731-hifi",
 232         .platform_name = "pxa-pcm-audio",
 233         .codec_name = "wm8731.0-001b",
 234         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 235                    SND_SOC_DAIFMT_CBS_CFS,
 236         .ops = &poodle_ops,
 237 };
 238
 239 /* poodle audio machine driver */
 240 static struct snd_soc_card poodle = {
 241         .name = "Poodle",
 242         .dai_link = &poodle_dai,
 243         .num_links = 1,
 244         .owner = THIS_MODULE,
 245
 246         .controls = wm8731_poodle_controls,
 247         .num_controls = ARRAY_SIZE(wm8731_poodle_controls),
 248         .dapm_widgets = wm8731_dapm_widgets,
 249         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 250         .dapm_routes = poodle_audio_map,
 251         .num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
 252         .fully_routed = true,
 253 };
 254
 255 static int poodle_probe(struct platform_device *pdev)
 256 {
 257         struct snd_soc_card *card = &poodle;
 258         int ret;
 259
 260         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 261                 POODLE_LOCOMO_GPIO_AMP_ON, 0);
 262         /* should we mute HP at startup - burning power ?*/
 263         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 264                 POODLE_LOCOMO_GPIO_MUTE_L, 0);
 265         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 266                 POODLE_LOCOMO_GPIO_MUTE_R, 0);
 267
 268         card->dev = &pdev->dev;
 269
 270         ret = devm_snd_soc_register_card(&pdev->dev, card);
 271         if (ret)
 272                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 273                         ret);
 274         return ret;
 275 }
 276
 277 static struct platform_driver poodle_driver = {
 278         .driver         = {
 279                 .name   = "poodle-audio",
 280                 .pm     = &snd_soc_pm_ops,
 281         },
 282         .probe          = poodle_probe,
 283 };
 284
 285 module_platform_driver(poodle_driver);
 286
 287 /* Module information */
 288 MODULE_AUTHOR("Richard Purdie");
 289 MODULE_DESCRIPTION("ALSA SoC Poodle");
 290 MODULE_LICENSE("GPL");
 291 MODULE_ALIAS("platform:poodle-audio");