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.h>
  23
  24 #define QI_LB60_SND_GPIO JZ_GPIO_PORTB(29)
  25 #define QI_LB60_AMP_GPIO JZ_GPIO_PORTD(4)
  26
  27 static 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
  38 static 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
  43 static 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
  53 static 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
  72 static 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
  82 static struct snd_soc_card qi_lb60 = {
  83         .name = "QI LB60",
  84         .dai_link = &qi_lb60_dai,
  85         .num_links = 1,
  86
  87         .dapm_widgets = qi_lb60_widgets,
  88         .num_dapm_widgets = ARRAY_SIZE(qi_lb60_widgets),
  89         .dapm_routes = qi_lb60_routes,
  90         .num_dapm_routes = ARRAY_SIZE(qi_lb60_routes),
  91 };
  92
  93 static struct platform_device *qi_lb60_snd_device;
  94
  95 static const struct gpio qi_lb60_gpios[] = {
  96         { QI_LB60_SND_GPIO, GPIOF_OUT_INIT_LOW, "SND" },
  97         { QI_LB60_AMP_GPIO, GPIOF_OUT_INIT_LOW, "AMP" },
  98 };
  99
 100 static int __init qi_lb60_init(void)
 101 {
 102         int ret;
 103
 104         qi_lb60_snd_device = platform_device_alloc("soc-audio", -1);
 105
 106         if (!qi_lb60_snd_device)
 107                 return -ENOMEM;
 108
 109         ret = gpio_request_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
 110         if (ret) {
 111                 pr_err("qi_lb60 snd: Failed to request gpios: %d\n", ret);
 112                 goto err_device_put;
 113         }
 114
 115         platform_set_drvdata(qi_lb60_snd_device, &qi_lb60);
 116
 117         ret = platform_device_add(qi_lb60_snd_device);
 118         if (ret) {
 119                 pr_err("qi_lb60 snd: Failed to add snd soc device: %d\n", ret);
 120                 goto err_unset_pdata;
 121         }
 122
 123          return 0;
 124
 125 err_unset_pdata:
 126         platform_set_drvdata(qi_lb60_snd_device, NULL);
 127 /*err_gpio_free_array:*/
 128         gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
 129 err_device_put:
 130         platform_device_put(qi_lb60_snd_device);
 131
 132         return ret;
 133 }
 134 module_init(qi_lb60_init);
 135
 136 static void __exit qi_lb60_exit(void)
 137 {
 138         platform_device_unregister(qi_lb60_snd_device);
 139         gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
 140 }
 141 module_exit(qi_lb60_exit);
 142
 143 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 144 MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
 145 MODULE_LICENSE("GPL v2");