sound/soc/jz4740/qi_lb60.c

   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
  24 struct qi_lb60 {
  25         struct gpio_desc *snd_gpio;
  26         struct gpio_desc *amp_gpio;
  27 };
  28
  29 static 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
  41 static 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
  46 static const struct snd_soc_dapm_route qi_lb60_routes[] = {
  47         {"Mic", NULL, "MIC"},
  48         {"Speaker", NULL, "LOUT"},
  49         {"Speaker", NULL, "ROUT"},
  50 };
  51
  52 static 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
  63 static 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
  76 static 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         int ret;
  81
  82         qi_lb60 = devm_kzalloc(&pdev->dev, sizeof(*qi_lb60), GFP_KERNEL);
  83         if (!qi_lb60)
  84                 return -ENOMEM;
  85
  86         qi_lb60->snd_gpio = devm_gpiod_get(&pdev->dev, "snd");
  87         if (IS_ERR(qi_lb60->snd_gpio))
  88                 return PTR_ERR(qi_lb60->snd_gpio);
  89         ret = gpiod_direction_output(qi_lb60->snd_gpio, 0);
  90         if (ret)
  91                 return ret;
  92
  93         qi_lb60->amp_gpio = devm_gpiod_get(&pdev->dev, "amp");
  94         if (IS_ERR(qi_lb60->amp_gpio))
  95                 return PTR_ERR(qi_lb60->amp_gpio);
  96         ret = gpiod_direction_output(qi_lb60->amp_gpio, 0);
  97         if (ret)
  98                 return ret;
  99
 100         card->dev = &pdev->dev;
 101
 102         snd_soc_card_set_drvdata(card, qi_lb60);
 103
 104         return devm_snd_soc_register_card(&pdev->dev, card);
 105 }
 106
 107 static struct platform_driver qi_lb60_driver = {
 108         .driver         = {
 109                 .name   = "qi-lb60-audio",
 110                 .owner  = THIS_MODULE,
 111         },
 112         .probe          = qi_lb60_probe,
 113 };
 114
 115 module_platform_driver(qi_lb60_driver);
 116
 117 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 118 MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
 119 MODULE_LICENSE("GPL v2");
 120 MODULE_ALIAS("platform:qi-lb60-audio");