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 codec DAI configuration */
 125         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 126                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 127         if (ret < 0)
 128                 return ret;
 129
 130         /* set cpu DAI configuration */
 131         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 132                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 133         if (ret < 0)
 134                 return ret;
 135
 136         /* set the codec system clock for DAC and ADC */
 137         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
 138                 SND_SOC_CLOCK_IN);
 139         if (ret < 0)
 140                 return ret;
 141
 142         /* set the I2S system clock as input (unused) */
 143         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 144                 SND_SOC_CLOCK_IN);
 145         if (ret < 0)
 146                 return ret;
 147
 148         return 0;
 149 }
 150
 151 static struct snd_soc_ops poodle_ops = {
 152         .startup = poodle_startup,
 153         .hw_params = poodle_hw_params,
 154         .shutdown = poodle_shutdown,
 155 };
 156
 157 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
 158         struct snd_ctl_elem_value *ucontrol)
 159 {
 160         ucontrol->value.integer.value[0] = poodle_jack_func;
 161         return 0;
 162 }
 163
 164 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
 165         struct snd_ctl_elem_value *ucontrol)
 166 {
 167         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 168
 169         if (poodle_jack_func == ucontrol->value.integer.value[0])
 170                 return 0;
 171
 172         poodle_jack_func = ucontrol->value.integer.value[0];
 173         poodle_ext_control(codec);
 174         return 1;
 175 }
 176
 177 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
 178         struct snd_ctl_elem_value *ucontrol)
 179 {
 180         ucontrol->value.integer.value[0] = poodle_spk_func;
 181         return 0;
 182 }
 183
 184 static int poodle_set_spk(struct snd_kcontrol *kcontrol,
 185         struct snd_ctl_elem_value *ucontrol)
 186 {
 187         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 188
 189         if (poodle_spk_func == ucontrol->value.integer.value[0])
 190                 return 0;
 191
 192         poodle_spk_func = ucontrol->value.integer.value[0];
 193         poodle_ext_control(codec);
 194         return 1;
 195 }
 196
 197 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
 198         struct snd_kcontrol *k, int event)
 199 {
 200         if (SND_SOC_DAPM_EVENT_ON(event))
 201                 locomo_gpio_write(&poodle_locomo_device.dev,
 202                         POODLE_LOCOMO_GPIO_AMP_ON, 0);
 203         else
 204                 locomo_gpio_write(&poodle_locomo_device.dev,
 205                         POODLE_LOCOMO_GPIO_AMP_ON, 1);
 206
 207         return 0;
 208 }
 209
 210 /* poodle machine dapm widgets */
 211 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 212 SND_SOC_DAPM_HP("Headphone Jack", NULL),
 213 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 214 };
 215
 216 /* Corgi machine connections to the codec pins */
 217 static const struct snd_soc_dapm_route audio_map[] = {
 218
 219         /* headphone connected to LHPOUT1, RHPOUT1 */
 220         {"Headphone Jack", NULL, "LHPOUT"},
 221         {"Headphone Jack", NULL, "RHPOUT"},
 222
 223         /* speaker connected to LOUT, ROUT */
 224         {"Ext Spk", NULL, "ROUT"},
 225         {"Ext Spk", NULL, "LOUT"},
 226 };
 227
 228 static const char *jack_function[] = {"Off", "Headphone"};
 229 static const char *spk_function[] = {"Off", "On"};
 230 static const struct soc_enum poodle_enum[] = {
 231         SOC_ENUM_SINGLE_EXT(2, jack_function),
 232         SOC_ENUM_SINGLE_EXT(2, spk_function),
 233 };
 234
 235 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
 236         SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
 237                 poodle_set_jack),
 238         SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
 239                 poodle_set_spk),
 240 };
 241
 242 /*
 243  * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 244  */
 245 static int poodle_wm8731_init(struct snd_soc_pcm_runtime *rtd)
 246 {
 247         struct snd_soc_codec *codec = rtd->codec;
 248         struct snd_soc_dapm_context *dapm = &codec->dapm;
 249         int err;
 250
 251         snd_soc_dapm_nc_pin(dapm, "LLINEIN");
 252         snd_soc_dapm_nc_pin(dapm, "RLINEIN");
 253         snd_soc_dapm_enable_pin(dapm, "MICIN");
 254
 255         /* Add poodle specific controls */
 256         err = snd_soc_add_controls(codec, wm8731_poodle_controls,
 257                                 ARRAY_SIZE(wm8731_poodle_controls));
 258         if (err < 0)
 259                 return err;
 260
 261         /* Add poodle specific widgets */
 262         snd_soc_dapm_new_controls(dapm, wm8731_dapm_widgets,
 263                                   ARRAY_SIZE(wm8731_dapm_widgets));
 264
 265         /* Set up poodle specific audio path audio_map */
 266         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 267
 268         return 0;
 269 }
 270
 271 /* poodle digital audio interface glue - connects codec <--> CPU */
 272 static struct snd_soc_dai_link poodle_dai = {
 273         .name = "WM8731",
 274         .stream_name = "WM8731",
 275         .cpu_dai_name = "pxa2xx-i2s",
 276         .codec_dai_name = "wm8731-hifi",
 277         .platform_name = "pxa-pcm-audio",
 278         .codec_name = "wm8731.0-001b",
 279         .init = poodle_wm8731_init,
 280         .ops = &poodle_ops,
 281 };
 282
 283 /* poodle audio machine driver */
 284 static struct snd_soc_card snd_soc_poodle = {
 285         .name = "Poodle",
 286         .dai_link = &poodle_dai,
 287         .num_links = 1,
 288         .owner = THIS_MODULE,
 289 };
 290
 291 static struct platform_device *poodle_snd_device;
 292
 293 static int __init poodle_init(void)
 294 {
 295         int ret;
 296
 297         if (!machine_is_poodle())
 298                 return -ENODEV;
 299
 300         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 301                 POODLE_LOCOMO_GPIO_AMP_ON, 0);
 302         /* should we mute HP at startup - burning power ?*/
 303         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 304                 POODLE_LOCOMO_GPIO_MUTE_L, 0);
 305         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 306                 POODLE_LOCOMO_GPIO_MUTE_R, 0);
 307
 308         poodle_snd_device = platform_device_alloc("soc-audio", -1);
 309         if (!poodle_snd_device)
 310                 return -ENOMEM;
 311
 312         platform_set_drvdata(poodle_snd_device, &snd_soc_poodle);
 313         ret = platform_device_add(poodle_snd_device);
 314
 315         if (ret)
 316                 platform_device_put(poodle_snd_device);
 317
 318         return ret;
 319 }
 320
 321 static void __exit poodle_exit(void)
 322 {
 323         platform_device_unregister(poodle_snd_device);
 324 }
 325
 326 module_init(poodle_init);
 327 module_exit(poodle_exit);
 328
 329 /* Module information */
 330 MODULE_AUTHOR("Richard Purdie");
 331 MODULE_DESCRIPTION("ALSA SoC Poodle");
 332 MODULE_LICENSE("GPL");