sound/soc/pxa/em-x270.c

   1 /*
   2  * SoC audio driver for EM-X270, eXeda and CM-X300
   3  *
   4  * Copyright 2007, 2009 CompuLab, Ltd.
   5  *
   6  * Author: Mike Rapoport <mike@compulab.co.il>
   7  *
   8  * Copied from tosa.c:
   9  * Copyright 2005 Wolfson Microelectronics PLC.
  10  * Copyright 2005 Openedhand Ltd.
  11  *
  12  * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
  13  *          Richard Purdie <richard@openedhand.com>
  14  *
  15  *  This program is free software; you can redistribute  it and/or modify it
  16  *  under  the terms of  the GNU General  Public License as published by the
  17  *  Free Software Foundation;  either version 2 of the  License, or (at your
  18  *  option) any later version.
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/moduleparam.h>
  24 #include <linux/device.h>
  25
  26 #include <sound/core.h>
  27 #include <sound/pcm.h>
  28 #include <sound/soc.h>
  29
  30 #include <asm/mach-types.h>
  31 #include <mach/audio.h>
  32
  33 static struct snd_soc_dai_link em_x270_dai[] = {
  34         {
  35                 .name = "AC97",
  36                 .stream_name = "AC97 HiFi",
  37                 .cpu_dai_name = "pxa2xx-ac97",
  38                 .codec_dai_name = "wm9712-hifi",
  39                 .platform_name = "pxa-pcm-audio",
  40                 .codec_name = "wm9712-codec",
  41         },
  42         {
  43                 .name = "AC97 Aux",
  44                 .stream_name = "AC97 Aux",
  45                 .cpu_dai_name = "pxa2xx-ac97-aux",
  46                 .codec_dai_name = "wm9712-aux",
  47                 .platform_name = "pxa-pcm-audio",
  48                 .codec_name = "wm9712-codec",
  49         },
  50 };
  51
  52 static struct snd_soc_card em_x270 = {
  53         .name = "EM-X270",
  54         .owner = THIS_MODULE,
  55         .dai_link = em_x270_dai,
  56         .num_links = ARRAY_SIZE(em_x270_dai),
  57 };
  58
  59 static struct platform_device *em_x270_snd_device;
  60
  61 static int __init em_x270_init(void)
  62 {
  63         int ret;
  64
  65         if (!(machine_is_em_x270() || machine_is_exeda()
  66               || machine_is_cm_x300()))
  67                 return -ENODEV;
  68
  69         em_x270_snd_device = platform_device_alloc("soc-audio", -1);
  70         if (!em_x270_snd_device)
  71                 return -ENOMEM;
  72
  73         platform_set_drvdata(em_x270_snd_device, &em_x270);
  74         ret = platform_device_add(em_x270_snd_device);
  75
  76         if (ret)
  77                 platform_device_put(em_x270_snd_device);
  78
  79         return ret;
  80 }
  81
  82 static void __exit em_x270_exit(void)
  83 {
  84         platform_device_unregister(em_x270_snd_device);
  85 }
  86
  87 module_init(em_x270_init);
  88 module_exit(em_x270_exit);
  89
  90 /* Module information */
  91 MODULE_AUTHOR("Mike Rapoport");
  92 MODULE_DESCRIPTION("ALSA SoC EM-X270, eXeda and CM-X300");
  93 MODULE_LICENSE("GPL");