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Linux/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");
121 

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