LXR linux/sound/soc/pxa/hx4700.c

   1/*
   2 * SoC audio for HP iPAQ hx4700
   3 *
   4 * Copyright (c) 2009 Philipp Zabel
   5 *
   6 *  This program is free software; you can redistribute  it and/or modify it
   7 *  under  the terms of  the GNU General  Public License as published by the
   8 *  Free Software Foundation;  either version 2 of the  License, or (at your
   9 *  option) any later version.
  10 *
  11 */
  12
  13#include <linux/module.h>
  14#include <linux/timer.h>
  15#include <linux/interrupt.h>
  16#include <linux/platform_device.h>
  17#include <linux/delay.h>
  18#include <linux/gpio.h>
  19
  20#include <sound/core.h>
  21#include <sound/jack.h>
  22#include <sound/pcm.h>
  23#include <sound/pcm_params.h>
  24#include <sound/soc.h>
  25
  26#include <mach/hx4700.h>
  27#include <asm/mach-types.h>
  28#include "pxa2xx-i2s.h"
  29
  30#include "../codecs/ak4641.h"
  31
  32static struct snd_soc_jack hs_jack;
  33
  34/* Headphones jack detection DAPM pin */
  35static struct snd_soc_jack_pin hs_jack_pin[] = {
  36        {
  37                .pin    = "Headphone Jack",
  38                .mask   = SND_JACK_HEADPHONE,
  39        },
  40        {
  41                .pin    = "Speaker",
  42                /* disable speaker when hp jack is inserted */
  43                .mask   = SND_JACK_HEADPHONE,
  44                .invert = 1,
  45        },
  46};
  47
  48/* Headphones jack detection GPIO */
  49static struct snd_soc_jack_gpio hs_jack_gpio = {
  50        .gpio           = GPIO75_HX4700_EARPHONE_nDET,
  51        .invert         = true,
  52        .name           = "hp-gpio",
  53        .report         = SND_JACK_HEADPHONE,
  54        .debounce_time  = 200,
  55};
  56
  57/*
  58 * iPAQ hx4700 uses I2S for capture and playback.
  59 */
  60static int hx4700_hw_params(struct snd_pcm_substream *substream,
  61                            struct snd_pcm_hw_params *params)
  62{
  63        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  64        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  65        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  66        int ret = 0;
  67
  68        /* set the I2S system clock as output */
  69        ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
  70                        SND_SOC_CLOCK_OUT);
  71        if (ret < 0)
  72                return ret;
  73
  74        /* inform codec driver about clock freq *
  75         * (PXA I2S always uses divider 256)    */
  76        ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
  77                        SND_SOC_CLOCK_IN);
  78        if (ret < 0)
  79                return ret;
  80
  81        return 0;
  82}
  83
  84static struct snd_soc_ops hx4700_ops = {
  85        .hw_params = hx4700_hw_params,
  86};
  87
  88static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
  89                            struct snd_kcontrol *k, int event)
  90{
  91        gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
  92        return 0;
  93}
  94
  95static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
  96                           struct snd_kcontrol *k, int event)
  97{
  98        gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
  99        return 0;
 100}
 101
 102/* hx4700 machine dapm widgets */
 103static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
 104        SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
 105        SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
 106        SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
 107};
 108
 109/* hx4700 machine audio_map */
 110static const struct snd_soc_dapm_route hx4700_audio_map[] = {
 111
 112        /* Headphone connected to LOUT, ROUT */
 113        {"Headphone Jack", NULL, "LOUT"},
 114        {"Headphone Jack", NULL, "ROUT"},
 115
 116        /* Speaker connected to MOUT2 */
 117        {"Speaker", NULL, "MOUT2"},
 118
 119        /* Microphone connected to MICIN */
 120        {"MICIN", NULL, "Built-in Microphone"},
 121        {"AIN", NULL, "MICOUT"},
 122};
 123
 124/*
 125 * Logic for a ak4641 as connected on a HP iPAQ hx4700
 126 */
 127static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
 128{
 129        struct snd_soc_codec *codec = rtd->codec;
 130        struct snd_soc_dapm_context *dapm = &codec->dapm;
 131        int err;
 132
 133        /* NC codec pins */
 134        /* FIXME: is anything connected here? */
 135        snd_soc_dapm_nc_pin(dapm, "MOUT1");
 136        snd_soc_dapm_nc_pin(dapm, "MICEXT");
 137        snd_soc_dapm_nc_pin(dapm, "AUX");
 138
 139        /* Jack detection API stuff */
 140        err = snd_soc_jack_new(codec, "Headphone Jack",
 141                                SND_JACK_HEADPHONE, &hs_jack);
 142        if (err)
 143                return err;
 144
 145        err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
 146                                        hs_jack_pin);
 147        if (err)
 148                return err;
 149
 150        err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
 151
 152        return err;
 153}
 154
 155/* hx4700 digital audio interface glue - connects codec <--> CPU */
 156static struct snd_soc_dai_link hx4700_dai = {
 157        .name = "ak4641",
 158        .stream_name = "AK4641",
 159        .cpu_dai_name = "pxa2xx-i2s",
 160        .codec_dai_name = "ak4641-hifi",
 161        .platform_name = "pxa-pcm-audio",
 162        .codec_name = "ak4641.0-0012",
 163        .init = hx4700_ak4641_init,
 164        .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
 165                   SND_SOC_DAIFMT_CBS_CFS,
 166        .ops = &hx4700_ops,
 167};
 168
 169/* hx4700 audio machine driver */
 170static struct snd_soc_card snd_soc_card_hx4700 = {
 171        .name                   = "iPAQ hx4700",
 172        .owner                  = THIS_MODULE,
 173        .dai_link               = &hx4700_dai,
 174        .num_links              = 1,
 175        .dapm_widgets           = hx4700_dapm_widgets,
 176        .num_dapm_widgets       = ARRAY_SIZE(hx4700_dapm_widgets),
 177        .dapm_routes            = hx4700_audio_map,
 178        .num_dapm_routes        = ARRAY_SIZE(hx4700_audio_map),
 179};
 180
 181static struct gpio hx4700_audio_gpios[] = {
 182        { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
 183        { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
 184};
 185
 186static int hx4700_audio_probe(struct platform_device *pdev)
 187{
 188        int ret;
 189
 190        if (!machine_is_h4700())
 191                return -ENODEV;
 192
 193        ret = gpio_request_array(hx4700_audio_gpios,
 194                                ARRAY_SIZE(hx4700_audio_gpios));
 195        if (ret)
 196                return ret;
 197
 198        snd_soc_card_hx4700.dev = &pdev->dev;
 199        ret = snd_soc_register_card(&snd_soc_card_hx4700);
 200        if (ret)
 201                gpio_free_array(hx4700_audio_gpios,
 202                                ARRAY_SIZE(hx4700_audio_gpios));
 203
 204        return ret;
 205}
 206
 207static int hx4700_audio_remove(struct platform_device *pdev)
 208{
 209        snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
 210        snd_soc_unregister_card(&snd_soc_card_hx4700);
 211
 212        gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
 213        gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
 214
 215        gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
 216        return 0;
 217}
 218
 219static struct platform_driver hx4700_audio_driver = {
 220        .driver = {
 221                .name = "hx4700-audio",
 222                .owner = THIS_MODULE,
 223                .pm = &snd_soc_pm_ops,
 224        },
 225        .probe  = hx4700_audio_probe,
 226        .remove = hx4700_audio_remove,
 227};
 228
 229module_platform_driver(hx4700_audio_driver);
 230
 231MODULE_AUTHOR("Philipp Zabel");
 232MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
 233MODULE_LICENSE("GPL");
 234MODULE_ALIAS("platform:hx4700-audio");
 235