LXR linux/sound/soc/jz4740/qi

   1/*
   2 * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 *
   8 *  You should have received a copy of the  GNU General Public License along
   9 *  with this program; if not, write  to the Free Software Foundation, Inc.,
  10 *  675 Mass Ave, Cambridge, MA 02139, USA.
  11 *
  12 */
  13
  14#include <linux/module.h>
  15#include <linux/moduleparam.h>
  16#include <linux/timer.h>
  17#include <linux/interrupt.h>
  18#include <linux/platform_device.h>
  19#include <sound/core.h>
  20#include <sound/pcm.h>
  21#include <sound/soc.h>
  22#include <linux/gpio.h>
  23
  24#define QI_LB60_SND_GPIO JZ_GPIO_PORTB(29)
  25#define QI_LB60_AMP_GPIO JZ_GPIO_PORTD(4)
  26
  27static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
  28                             struct snd_kcontrol *ctrl, int event)
  29{
  30        int on = !SND_SOC_DAPM_EVENT_OFF(event);
  31
  32        gpio_set_value(QI_LB60_SND_GPIO, on);
  33        gpio_set_value(QI_LB60_AMP_GPIO, on);
  34
  35        return 0;
  36}
  37
  38static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
  39        SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
  40        SND_SOC_DAPM_MIC("Mic", NULL),
  41};
  42
  43static const struct snd_soc_dapm_route qi_lb60_routes[] = {
  44        {"Mic", NULL, "MIC"},
  45        {"Speaker", NULL, "LOUT"},
  46        {"Speaker", NULL, "ROUT"},
  47};
  48
  49#define QI_LB60_DAIFMT (SND_SOC_DAIFMT_I2S | \
  50                        SND_SOC_DAIFMT_NB_NF | \
  51                        SND_SOC_DAIFMT_CBM_CFM)
  52
  53static int qi_lb60_codec_init(struct snd_soc_pcm_runtime *rtd)
  54{
  55        struct snd_soc_codec *codec = rtd->codec;
  56        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  57        struct snd_soc_dapm_context *dapm = &codec->dapm;
  58        int ret;
  59
  60        snd_soc_dapm_nc_pin(dapm, "LIN");
  61        snd_soc_dapm_nc_pin(dapm, "RIN");
  62
  63        ret = snd_soc_dai_set_fmt(cpu_dai, QI_LB60_DAIFMT);
  64        if (ret < 0) {
  65                dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
  66                return ret;
  67        }
  68
  69        return 0;
  70}
  71
  72static struct snd_soc_dai_link qi_lb60_dai = {
  73        .name = "jz4740",
  74        .stream_name = "jz4740",
  75        .cpu_dai_name = "jz4740-i2s",
  76        .platform_name = "jz4740-pcm-audio",
  77        .codec_dai_name = "jz4740-hifi",
  78        .codec_name = "jz4740-codec",
  79        .init = qi_lb60_codec_init,
  80};
  81
  82static struct snd_soc_card qi_lb60 = {
  83        .name = "QI LB60",
  84        .owner = THIS_MODULE,
  85        .dai_link = &qi_lb60_dai,
  86        .num_links = 1,
  87
  88        .dapm_widgets = qi_lb60_widgets,
  89        .num_dapm_widgets = ARRAY_SIZE(qi_lb60_widgets),
  90        .dapm_routes = qi_lb60_routes,
  91        .num_dapm_routes = ARRAY_SIZE(qi_lb60_routes),
  92};
  93
  94static const struct gpio qi_lb60_gpios[] = {
  95        { QI_LB60_SND_GPIO, GPIOF_OUT_INIT_LOW, "SND" },
  96        { QI_LB60_AMP_GPIO, GPIOF_OUT_INIT_LOW, "AMP" },
  97};
  98
  99static int qi_lb60_probe(struct platform_device *pdev)
 100{
 101        struct snd_soc_card *card = &qi_lb60;
 102        int ret;
 103
 104        ret = gpio_request_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
 105        if (ret)
 106                return ret;
 107
 108        card->dev = &pdev->dev;
 109
 110        ret = snd_soc_register_card(card);
 111        if (ret) {
 112                dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 113                        ret);
 114                gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
 115        }
 116        return ret;
 117}
 118
 119static int qi_lb60_remove(struct platform_device *pdev)
 120{
 121        struct snd_soc_card *card = platform_get_drvdata(pdev);
 122
 123        snd_soc_unregister_card(card);
 124        gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
 125        return 0;
 126}
 127
 128static struct platform_driver qi_lb60_driver = {
 129        .driver         = {
 130                .name   = "qi-lb60-audio",
 131                .owner  = THIS_MODULE,
 132        },
 133        .probe          = qi_lb60_probe,
 134        .remove         = qi_lb60_remove,
 135};
 136
 137module_platform_driver(qi_lb60_driver);
 138
 139MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 140MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
 141MODULE_LICENSE("GPL v2");
 142MODULE_ALIAS("platform:qi-lb60-audio");
 143