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