sound/soc/codecs/wm1250-ev1.c

   1 /*
   2  * Driver for the 1250-EV1 audio I/O module
   3  *
   4  * Copyright 2011 Wolfson Microelectronics plc
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  *
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/i2c.h>
  16
  17 #include <sound/soc.h>
  18 #include <sound/soc-dapm.h>
  19
  20 static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
  21 SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
  22 SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
  23
  24 SND_SOC_DAPM_INPUT("WM1250 Input"),
  25 SND_SOC_DAPM_INPUT("WM1250 Output"),
  26 };
  27
  28 static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
  29         { "ADC", NULL, "WM1250 Input" },
  30         { "WM1250 Output", NULL, "DAC" },
  31 };
  32
  33 static struct snd_soc_dai_driver wm1250_ev1_dai = {
  34         .name = "wm1250-ev1",
  35         .playback = {
  36                 .stream_name = "Playback",
  37                 .channels_min = 1,
  38                 .channels_max = 1,
  39                 .rates = SNDRV_PCM_RATE_8000,
  40                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  41         },
  42         .capture = {
  43                 .stream_name = "Capture",
  44                 .channels_min = 1,
  45                 .channels_max = 1,
  46                 .rates = SNDRV_PCM_RATE_8000,
  47                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
  48         },
  49 };
  50
  51 static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
  52         .dapm_widgets = wm1250_ev1_dapm_widgets,
  53         .num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
  54         .dapm_routes = wm1250_ev1_dapm_routes,
  55         .num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
  56 };
  57
  58 static int __devinit wm1250_ev1_probe(struct i2c_client *i2c,
  59                                       const struct i2c_device_id *id)
  60 {
  61         return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
  62                                       &wm1250_ev1_dai, 1);
  63 }
  64
  65 static int __devexit wm1250_ev1_remove(struct i2c_client *i2c)
  66 {
  67         snd_soc_unregister_codec(&i2c->dev);
  68
  69         return 0;
  70 }
  71
  72 static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
  73         { "wm1250-ev1", 0 },
  74         { }
  75 };
  76 MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
  77
  78 static struct i2c_driver wm1250_ev1_i2c_driver = {
  79         .driver = {
  80                 .name = "wm1250-ev1",
  81                 .owner = THIS_MODULE,
  82         },
  83         .probe =    wm1250_ev1_probe,
  84         .remove =   __devexit_p(wm1250_ev1_remove),
  85         .id_table = wm1250_ev1_i2c_id,
  86 };
  87
  88 static int __init wm1250_ev1_modinit(void)
  89 {
  90         int ret = 0;
  91
  92         ret = i2c_add_driver(&wm1250_ev1_i2c_driver);
  93         if (ret != 0)
  94                 pr_err("Failed to register WM1250-EV1 I2C driver: %d\n", ret);
  95
  96         return ret;
  97 }
  98 module_init(wm1250_ev1_modinit);
  99
 100 static void __exit wm1250_ev1_exit(void)
 101 {
 102         i2c_del_driver(&wm1250_ev1_i2c_driver);
 103 }
 104 module_exit(wm1250_ev1_exit);
 105
 106 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 107 MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
 108 MODULE_LICENSE("GPL");