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 #include <sound/soc-dapm.h>
  27
  28 #include <asm/mach-types.h>
  29 #include <asm/hardware/locomo.h>
  30 #include <mach/poodle.h>
  31 #include <mach/audio.h>
  32
  33 #include "../codecs/wm8731.h"
  34 #include "pxa2xx-i2s.h"
  35
  36 #define POODLE_HP        1
  37 #define POODLE_HP_OFF    0
  38 #define POODLE_SPK_ON    1
  39 #define POODLE_SPK_OFF   0
  40
  41  /* audio clock in Hz - rounded from 12.235MHz */
  42 #define POODLE_AUDIO_CLOCK 12288000
  43
  44 static int poodle_jack_func;
  45 static int poodle_spk_func;
  46
  47 static void poodle_ext_control(struct snd_soc_codec *codec)
  48 {
  49         /* set up jack connection */
  50         if (poodle_jack_func == POODLE_HP) {
  51                 /* set = unmute headphone */
  52                 locomo_gpio_write(&poodle_locomo_device.dev,
  53                         POODLE_LOCOMO_GPIO_MUTE_L, 1);
  54                 locomo_gpio_write(&poodle_locomo_device.dev,
  55                         POODLE_LOCOMO_GPIO_MUTE_R, 1);
  56                 snd_soc_dapm_enable_pin(codec, "Headphone Jack");
  57         } else {
  58                 locomo_gpio_write(&poodle_locomo_device.dev,
  59                         POODLE_LOCOMO_GPIO_MUTE_L, 0);
  60                 locomo_gpio_write(&poodle_locomo_device.dev,
  61                         POODLE_LOCOMO_GPIO_MUTE_R, 0);
  62                 snd_soc_dapm_disable_pin(codec, "Headphone Jack");
  63         }
  64
  65         /* set the enpoints to their new connetion states */
  66         if (poodle_spk_func == POODLE_SPK_ON)
  67                 snd_soc_dapm_enable_pin(codec, "Ext Spk");
  68         else
  69                 snd_soc_dapm_disable_pin(codec, "Ext Spk");
  70
  71         /* signal a DAPM event */
  72         snd_soc_dapm_sync(codec);
  73 }
  74
  75 static int poodle_startup(struct snd_pcm_substream *substream)
  76 {
  77         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  78         struct snd_soc_codec *codec = rtd->codec;
  79
  80         /* check the jack status at stream startup */
  81         poodle_ext_control(codec);
  82         return 0;
  83 }
  84
  85 /* we need to unmute the HP at shutdown as the mute burns power on poodle */
  86 static void poodle_shutdown(struct snd_pcm_substream *substream)
  87 {
  88         /* set = unmute headphone */
  89         locomo_gpio_write(&poodle_locomo_device.dev,
  90                 POODLE_LOCOMO_GPIO_MUTE_L, 1);
  91         locomo_gpio_write(&poodle_locomo_device.dev,
  92                 POODLE_LOCOMO_GPIO_MUTE_R, 1);
  93 }
  94
  95 static int poodle_hw_params(struct snd_pcm_substream *substream,
  96         struct snd_pcm_hw_params *params)
  97 {
  98         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  99         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 100         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 101         unsigned int clk = 0;
 102         int ret = 0;
 103
 104         switch (params_rate(params)) {
 105         case 8000:
 106         case 16000:
 107         case 48000:
 108         case 96000:
 109                 clk = 12288000;
 110                 break;
 111         case 11025:
 112         case 22050:
 113         case 44100:
 114                 clk = 11289600;
 115                 break;
 116         }
 117
 118         /* set codec DAI configuration */
 119         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 120                 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 121         if (ret < 0)
 122                 return ret;
 123
 124         /* set cpu DAI configuration */
 125         ret = snd_soc_dai_set_fmt(cpu_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 the codec system clock for DAC and ADC */
 131         ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK, clk,
 132                 SND_SOC_CLOCK_IN);
 133         if (ret < 0)
 134                 return ret;
 135
 136         /* set the I2S system clock as input (unused) */
 137         ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 138                 SND_SOC_CLOCK_IN);
 139         if (ret < 0)
 140                 return ret;
 141
 142         return 0;
 143 }
 144
 145 static struct snd_soc_ops poodle_ops = {
 146         .startup = poodle_startup,
 147         .hw_params = poodle_hw_params,
 148         .shutdown = poodle_shutdown,
 149 };
 150
 151 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
 152         struct snd_ctl_elem_value *ucontrol)
 153 {
 154         ucontrol->value.integer.value[0] = poodle_jack_func;
 155         return 0;
 156 }
 157
 158 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
 159         struct snd_ctl_elem_value *ucontrol)
 160 {
 161         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 162
 163         if (poodle_jack_func == ucontrol->value.integer.value[0])
 164                 return 0;
 165
 166         poodle_jack_func = ucontrol->value.integer.value[0];
 167         poodle_ext_control(codec);
 168         return 1;
 169 }
 170
 171 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
 172         struct snd_ctl_elem_value *ucontrol)
 173 {
 174         ucontrol->value.integer.value[0] = poodle_spk_func;
 175         return 0;
 176 }
 177
 178 static int poodle_set_spk(struct snd_kcontrol *kcontrol,
 179         struct snd_ctl_elem_value *ucontrol)
 180 {
 181         struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
 182
 183         if (poodle_spk_func == ucontrol->value.integer.value[0])
 184                 return 0;
 185
 186         poodle_spk_func = ucontrol->value.integer.value[0];
 187         poodle_ext_control(codec);
 188         return 1;
 189 }
 190
 191 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
 192         struct snd_kcontrol *k, int event)
 193 {
 194         if (SND_SOC_DAPM_EVENT_ON(event))
 195                 locomo_gpio_write(&poodle_locomo_device.dev,
 196                         POODLE_LOCOMO_GPIO_AMP_ON, 0);
 197         else
 198                 locomo_gpio_write(&poodle_locomo_device.dev,
 199                         POODLE_LOCOMO_GPIO_AMP_ON, 1);
 200
 201         return 0;
 202 }
 203
 204 /* poodle machine dapm widgets */
 205 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 206 SND_SOC_DAPM_HP("Headphone Jack", NULL),
 207 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 208 };
 209
 210 /* Corgi machine connections to the codec pins */
 211 static const struct snd_soc_dapm_route audio_map[] = {
 212
 213         /* headphone connected to LHPOUT1, RHPOUT1 */
 214         {"Headphone Jack", NULL, "LHPOUT"},
 215         {"Headphone Jack", NULL, "RHPOUT"},
 216
 217         /* speaker connected to LOUT, ROUT */
 218         {"Ext Spk", NULL, "ROUT"},
 219         {"Ext Spk", NULL, "LOUT"},
 220 };
 221
 222 static const char *jack_function[] = {"Off", "Headphone"};
 223 static const char *spk_function[] = {"Off", "On"};
 224 static const struct soc_enum poodle_enum[] = {
 225         SOC_ENUM_SINGLE_EXT(2, jack_function),
 226         SOC_ENUM_SINGLE_EXT(2, spk_function),
 227 };
 228
 229 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
 230         SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
 231                 poodle_set_jack),
 232         SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
 233                 poodle_set_spk),
 234 };
 235
 236 /*
 237  * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
 238  */
 239 static int poodle_wm8731_init(struct snd_soc_pcm_runtime *rtd)
 240 {
 241         struct snd_soc_codec *codec = rtd->codec;
 242         int err;
 243
 244         snd_soc_dapm_nc_pin(codec, "LLINEIN");
 245         snd_soc_dapm_nc_pin(codec, "RLINEIN");
 246         snd_soc_dapm_enable_pin(codec, "MICIN");
 247
 248         /* Add poodle specific controls */
 249         err = snd_soc_add_controls(codec, wm8731_poodle_controls,
 250                                 ARRAY_SIZE(wm8731_poodle_controls));
 251         if (err < 0)
 252                 return err;
 253
 254         /* Add poodle specific widgets */
 255         snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets,
 256                                   ARRAY_SIZE(wm8731_dapm_widgets));
 257
 258         /* Set up poodle specific audio path audio_map */
 259         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 260
 261         snd_soc_dapm_sync(codec);
 262         return 0;
 263 }
 264
 265 /* poodle digital audio interface glue - connects codec <--> CPU */
 266 static struct snd_soc_dai_link poodle_dai = {
 267         .name = "WM8731",
 268         .stream_name = "WM8731",
 269         .cpu_dai_name = "pxa-i2s",
 270         .codec_dai_name = "wm8731-hifi"
 271         .platform_name = "pxa-pcm-audio",
 272         .codec_name = "wm8731-codec.0-001a",
 273         .init = poodle_wm8731_init,
 274         .ops = &poodle_ops,
 275 };
 276
 277 /* poodle audio machine driver */
 278 static struct snd_soc_card snd_soc_poodle = {
 279         .name = "Poodle",
 280         .dai_link = &poodle_dai,
 281         .num_links = 1,
 282         .owner = THIS_MODULE,
 283 };
 284
 285 static struct platform_device *poodle_snd_device;
 286
 287 static int __init poodle_init(void)
 288 {
 289         int ret;
 290
 291         if (!machine_is_poodle())
 292                 return -ENODEV;
 293
 294         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 295                 POODLE_LOCOMO_GPIO_AMP_ON, 0);
 296         /* should we mute HP at startup - burning power ?*/
 297         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 298                 POODLE_LOCOMO_GPIO_MUTE_L, 0);
 299         locomo_gpio_set_dir(&poodle_locomo_device.dev,
 300                 POODLE_LOCOMO_GPIO_MUTE_R, 0);
 301
 302         poodle_snd_device = platform_device_alloc("soc-audio", -1);
 303         if (!poodle_snd_device)
 304                 return -ENOMEM;
 305
 306         platform_set_drvdata(poodle_snd_device, &snd_soc_poodle);
 307         ret = platform_device_add(poodle_snd_device);
 308
 309         if (ret)
 310                 platform_device_put(poodle_snd_device);
 311
 312         return ret;
 313 }
 314
 315 static void __exit poodle_exit(void)
 316 {
 317         platform_device_unregister(poodle_snd_device);
 318 }
 319
 320 module_init(poodle_init);
 321 module_exit(poodle_exit);
 322
 323 /* Module information */
 324 MODULE_AUTHOR("Richard Purdie");
 325 MODULE_DESCRIPTION("ALSA SoC Poodle");
 326 MODULE_LICENSE("GPL");