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/consumer.h>
  23
  24struct qi_lb60 {
  25        struct gpio_desc *snd_gpio;
  26        struct gpio_desc *amp_gpio;
  27};
  28
  29static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
  30                             struct snd_kcontrol *ctrl, int event)
  31{
  32        struct qi_lb60 *qi_lb60 = snd_soc_card_get_drvdata(widget->dapm->card);
  33        int on = !SND_SOC_DAPM_EVENT_OFF(event);
  34
  35        gpiod_set_value_cansleep(qi_lb60->snd_gpio, on);
  36        gpiod_set_value_cansleep(qi_lb60->amp_gpio, on);
  37
  38        return 0;
  39}
  40
  41static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
  42        SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
  43        SND_SOC_DAPM_MIC("Mic", NULL),
  44};
  45
  46static const struct snd_soc_dapm_route qi_lb60_routes[] = {
  47        {"Mic", NULL, "MIC"},
  48        {"Speaker", NULL, "LOUT"},
  49        {"Speaker", NULL, "ROUT"},
  50};
  51
  52static struct snd_soc_dai_link qi_lb60_dai = {
  53        .name = "jz4740",
  54        .stream_name = "jz4740",
  55        .cpu_dai_name = "jz4740-i2s",
  56        .platform_name = "jz4740-i2s",
  57        .codec_dai_name = "jz4740-hifi",
  58        .codec_name = "jz4740-codec",
  59        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  60                SND_SOC_DAIFMT_CBM_CFM,
  61};
  62
  63static struct snd_soc_card qi_lb60_card = {
  64        .name = "QI LB60",
  65        .owner = THIS_MODULE,
  66        .dai_link = &qi_lb60_dai,
  67        .num_links = 1,
  68
  69        .dapm_widgets = qi_lb60_widgets,
  70        .num_dapm_widgets = ARRAY_SIZE(qi_lb60_widgets),
  71        .dapm_routes = qi_lb60_routes,
  72        .num_dapm_routes = ARRAY_SIZE(qi_lb60_routes),
  73        .fully_routed = true,
  74};
  75
  76static int qi_lb60_probe(struct platform_device *pdev)
  77{
  78        struct qi_lb60 *qi_lb60;
  79        struct snd_soc_card *card = &qi_lb60_card;
  80
  81        qi_lb60 = devm_kzalloc(&pdev->dev, sizeof(*qi_lb60), GFP_KERNEL);
  82        if (!qi_lb60)
  83                return -ENOMEM;
  84
  85        qi_lb60->snd_gpio = devm_gpiod_get(&pdev->dev, "snd", GPIOD_OUT_LOW);
  86        if (IS_ERR(qi_lb60->snd_gpio))
  87                return PTR_ERR(qi_lb60->snd_gpio);
  88
  89        qi_lb60->amp_gpio = devm_gpiod_get(&pdev->dev, "amp", GPIOD_OUT_LOW);
  90        if (IS_ERR(qi_lb60->amp_gpio))
  91                return PTR_ERR(qi_lb60->amp_gpio);
  92
  93        card->dev = &pdev->dev;
  94
  95        snd_soc_card_set_drvdata(card, qi_lb60);
  96
  97        return devm_snd_soc_register_card(&pdev->dev, card);
  98}
  99
 100static struct platform_driver qi_lb60_driver = {
 101        .driver         = {
 102                .name   = "qi-lb60-audio",
 103        },
 104        .probe          = qi_lb60_probe,
 105};
 106
 107module_platform_driver(qi_lb60_driver);
 108
 109MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 110MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
 111MODULE_LICENSE("GPL v2");
 112MODULE_ALIAS("platform:qi-lb60-audio");
 113