LXR linux/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
  43static int poodle_jack_func;
  44static int poodle_spk_func;
  45
  46static 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
  74static 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 */
  90static 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
  99static 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
 137static struct snd_soc_ops poodle_ops = {
 138        .startup = poodle_startup,
 139        .hw_params = poodle_hw_params,
 140        .shutdown = poodle_shutdown,
 141};
 142
 143static 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
 150static 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
 163static 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
 170static 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
 183static 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 */
 197static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 198SND_SOC_DAPM_HP("Headphone Jack", NULL),
 199SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
 200};
 201
 202/* Corgi machine connections to the codec pins */
 203static 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
 214static const char *jack_function[] = {"Off", "Headphone"};
 215static const char *spk_function[] = {"Off", "On"};
 216static const struct soc_enum poodle_enum[] = {
 217        SOC_ENUM_SINGLE_EXT(2, jack_function),
 218        SOC_ENUM_SINGLE_EXT(2, spk_function),
 219};
 220
 221static 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 */
 231static 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 */
 244static 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 */
 258static 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
 272static 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
 294static 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
 302static 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
 311module_platform_driver(poodle_driver);
 312
 313/* Module information */
 314MODULE_AUTHOR("Richard Purdie");
 315MODULE_DESCRIPTION("ALSA SoC Poodle");
 316MODULE_LICENSE("GPL");
 317MODULE_ALIAS("platform:poodle-audio");
 318