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_codec *codec)
  47 {
  48         struct snd_soc_dapm_context *dapm = &codec->dapm;
  49
  50         /* set up jack connection */
  51         if (poodle_jack_func == POODLE_HP) {
  52                 /* set = unmute headphone */
  53                 locomo_gpio_write(&poodle_locomo_device.dev,
  54                         POODLE_LOCOMO_GPIO_MUTE_L, 1);
  55                 locomo_gpio_write(&poodle_locomo_device.dev,
  56                         POODLE_LOCOMO_GPIO_MUTE_R, 1);
  57                 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
  58         } else {
  59                 locomo_gpio_write(&poodle_locomo_device.dev,
  60                         POODLE_LOCOMO_GPIO_MUTE_L, 0);
  61                 locomo_gpio_write(&poodle_locomo_device.dev,
  62                         POODLE_LOCOMO_GPIO_MUTE_R, 0);
  63                 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
  64         }
  65
  66         /* set the enpoints to their new connetion states */
  67         if (poodle_spk_func == POODLE_SPK_ON)
  68                 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
  69         else
  70                 snd_soc_dapm_disable_pin(dapm, "Ext Spk");
  71
  72         /* signal a DAPM event */
  73         snd_soc_dapm_sync(dapm);
  74 }
  75
  76 static int poodle_startup(struct snd_pcm_substream *substream)
  77 {
  78         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  79         struct snd_soc_codec *codec = rtd->codec;
  80
  81         mutex_lock(&codec->mutex);
  82
  83         /* check the jack status at stream startup */
  84         poodle_ext_control(codec);
  85
  86         mutex_unlock(&codec->mutex);
  87
  88         return 0;
  89 }
  90
  91 /* we need to unmute the HP at shutdown as the mute burns power on poodle */
  92 static void poodle_shutdown(struct snd_pcm_substream *substream)
  93 {
  94         /* set = unmute headphone */
  95         locomo_gpio_write(&poodle_locomo_device.dev,
  96                 POODLE_LOCOMO_GPIO_MUTE_L, 1);
  97         locomo_gpio_write(&poodle_locomo_device.dev,
  98                 POODLE_LOCOMO_GPIO_MUTE_R, 1);
  99 }
 100
 101 static int poodle_hw_params(struct snd_pcm_substream *substream,
 102         struct snd_pcm_hw_params *params)
 103 {
 104         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 105         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 106         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 107         unsigned int clk = 0;
 108         int ret = 0;
 109
 110         switch (params_rate(params)) {
 111         case 8000:
 112         case 16000:
 113         case 48000:
 114         case 96000:
 115                 clk = 12288000;
 116                 break;
 117         case 11025:
 118         case 22050:
 119         case 44100:
 120                 clk = 11289600;
 121                 break;
 122         }
 123
 124         /* set the codec system clock for DAC and ADC */
 125         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
 126                 SND_SOC_CLOCK_IN);
 127         if (ret < 0)
 128                 return ret;
 129
 130         /* set the I2S system clock as input (unused) */
 131         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 132                 SND_SOC_CLOCK_IN);
 133         if (ret < 0)
 134                 return ret;
 135
 136         return 0;
 137 }
 138
 139 static struct snd_soc_ops poodle_ops = {
 140         .startup = poodle_startup,
 141         .hw_params = poodle_hw_params,
 142         .shutdown = poodle_shutdown,
 143 };
 144
 145 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
 146         struct snd_ctl_elem_value *ucontrol)
 147 {
 148         ucontrol->value.integer.value[0] = poodle_jack_func;
 149         return 0;
 150 }
 151
 152 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
 153         struct snd_ctl_elem_value *ucontrol)
 154 {
 155         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 156
 157         if (poodle_jack_func == ucontrol->value.integer.value[0])
 158                 return 0;
 159
 160         poodle_jack_func = ucontrol->value.integer.value[0];
 161         poodle_ext_control(codec);
 162         return 1;
 163 }
 164
 165 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
 166         struct snd_ctl_elem_value *ucontrol)
 167 {
 168         ucontrol->value.integer.value[0] = poodle_spk_func;
 169         return 0;
 170 }
 171
 172 static int poodle_set_spk(struct snd_kcontrol *kcontrol,
 173         struct snd_ctl_elem_value *ucontrol)
 174 {
 175         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 176
 177         if (poodle_spk_func == ucontrol->value.integer.value[0])
 178                 return 0;
 179
 180         poodle_spk_func = ucontrol->value.integer.value[0];
 181         poodle_ext_control(codec);
 182         return 1;
 183 }
 184
 185 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
 186         struct snd_kcontrol *k, int event)
 187 {
 188         if (SND_SOC_DAPM_EVENT_ON(event))
 189                 locomo_gpio_write(&poodle_locomo_device.dev,
 190                         POODLE_LOCOMO_GPIO_AMP_ON, 0);
 191         else
 192                 locomo_gpio_write(&poodle_locomo_device.dev,
 193                         POODLE_LOCOMO_GPIO_AMP_ON, 1);
 194
 195         return 0;
 196 }
 197
 198 /* poodle machine dapm widgets */
 199 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 200 SND_SOC_DAPM_HP("Headphone Jack", NULL),
 201 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 202 };
 203
 204 /* Corgi machine connections to the codec pins */
 205 static const struct snd_soc_dapm_route poodle_audio_map[] = {
 206
 207         /* headphone connected to LHPOUT1, RHPOUT1 */
 208         {"Headphone Jack", NULL, "LHPOUT"},
 209         {"Headphone Jack", NULL, "RHPOUT"},
 210
 211         /* speaker connected to LOUT, ROUT */
 212         {"Ext Spk", NULL, "ROUT"},
 213         {"Ext Spk", NULL, "LOUT"},
 214 };
 215
 216 static const char *jack_function[] = {"Off", "Headphone"};
 217 static const char *spk_function[] = {"Off", "On"};
 218 static const struct soc_enum poodle_enum[] = {
 219         SOC_ENUM_SINGLE_EXT(2, jack_function),
 220         SOC_ENUM_SINGLE_EXT(2, spk_function),
 221 };
 222
 223 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
 224         SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
 225                 poodle_set_jack),
 226         SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
 227                 poodle_set_spk),
 228 };
 229
 230 /*
 231  * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 232  */
 233 static int poodle_wm8731_init(struct snd_soc_pcm_runtime *rtd)
 234 {
 235         struct snd_soc_codec *codec = rtd->codec;
 236         struct snd_soc_dapm_context *dapm = &codec->dapm;
 237
 238         snd_soc_dapm_nc_pin(dapm, "LLINEIN");
 239         snd_soc_dapm_nc_pin(dapm, "RLINEIN");
 240         snd_soc_dapm_enable_pin(dapm, "MICIN");
 241
 242         return 0;
 243 }
 244
 245 /* poodle digital audio interface glue - connects codec <--> CPU */
 246 static struct snd_soc_dai_link poodle_dai = {
 247         .name = "WM8731",
 248         .stream_name = "WM8731",
 249         .cpu_dai_name = "pxa2xx-i2s",
 250         .codec_dai_name = "wm8731-hifi",
 251         .platform_name = "pxa-pcm-audio",
 252         .codec_name = "wm8731.0-001b",
 253         .init = poodle_wm8731_init,
 254         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 255                    SND_SOC_DAIFMT_CBS_CFS,
 256         .ops = &poodle_ops,
 257 };
 258
 259 /* poodle audio machine driver */
 260 static struct snd_soc_card poodle = {
 261         .name = "Poodle",
 262         .dai_link = &poodle_dai,
 263         .num_links = 1,
 264         .owner = THIS_MODULE,
 265
 266         .controls = wm8731_poodle_controls,
 267         .num_controls = ARRAY_SIZE(wm8731_poodle_controls),
 268         .dapm_widgets = wm8731_dapm_widgets,
 269         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 270         .dapm_routes = poodle_audio_map,
 271         .num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
 272 };
 273
 274 static int __devinit poodle_probe(struct platform_device *pdev)
 275 {
 276         struct snd_soc_card *card = &poodle;
 277         int ret;
 278
 279         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 280                 POODLE_LOCOMO_GPIO_AMP_ON, 0);
 281         /* should we mute HP at startup - burning power ?*/
 282         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 283                 POODLE_LOCOMO_GPIO_MUTE_L, 0);
 284         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 285                 POODLE_LOCOMO_GPIO_MUTE_R, 0);
 286
 287         card->dev = &pdev->dev;
 288
 289         ret = snd_soc_register_card(card);
 290         if (ret)
 291                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 292                         ret);
 293         return ret;
 294 }
 295
 296 static int __devexit poodle_remove(struct platform_device *pdev)
 297 {
 298         struct snd_soc_card *card = platform_get_drvdata(pdev);
 299
 300         snd_soc_unregister_card(card);
 301         return 0;
 302 }
 303
 304 static struct platform_driver poodle_driver = {
 305         .driver         = {
 306                 .name   = "poodle-audio",
 307                 .owner  = THIS_MODULE,
 308         },
 309         .probe          = poodle_probe,
 310         .remove         = __devexit_p(poodle_remove),
 311 };
 312
 313 module_platform_driver(poodle_driver);
 314
 315 /* Module information */
 316 MODULE_AUTHOR("Richard Purdie");
 317 MODULE_DESCRIPTION("ALSA SoC Poodle");
 318 MODULE_LICENSE("GPL");
 319 MODULE_ALIAS("platform:poodle-audio");