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