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em-x270.c
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1 /*
2  * SoC audio driver for EM-X270, eXeda and CM-X300
3  *
4  * Copyright 2007, 2009 CompuLab, Ltd.
5  *
6  * Author: Mike Rapoport <[email protected]>
7  *
8  * Copied from tosa.c:
9  * Copyright 2005 Wolfson Microelectronics PLC.
10  * Copyright 2005 Openedhand Ltd.
11  *
12  * Authors: Liam Girdwood <[email protected]>
13  * Richard Purdie <[email protected]>
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 #include "../codecs/wm9712.h"
34 #include "pxa2xx-ac97.h"
35 
36 static struct snd_soc_dai_link em_x270_dai[] = {
37  {
38  .name = "AC97",
39  .stream_name = "AC97 HiFi",
40  .cpu_dai_name = "pxa2xx-ac97",
41  .codec_dai_name = "wm9712-hifi",
42  .platform_name = "pxa-pcm-audio",
43  .codec_name = "wm9712-codec",
44  },
45  {
46  .name = "AC97 Aux",
47  .stream_name = "AC97 Aux",
48  .cpu_dai_name = "pxa2xx-ac97-aux",
49  .codec_dai_name ="wm9712-aux",
50  .platform_name = "pxa-pcm-audio",
51  .codec_name = "wm9712-codec",
52  },
53 };
54 
55 static struct snd_soc_card em_x270 = {
56  .name = "EM-X270",
57  .owner = THIS_MODULE,
58  .dai_link = em_x270_dai,
59  .num_links = ARRAY_SIZE(em_x270_dai),
60 };
61 
62 static struct platform_device *em_x270_snd_device;
63 
64 static int __init em_x270_init(void)
65 {
66  int ret;
67 
68  if (!(machine_is_em_x270() || machine_is_exeda()
69  || machine_is_cm_x300()))
70  return -ENODEV;
71 
72  em_x270_snd_device = platform_device_alloc("soc-audio", -1);
73  if (!em_x270_snd_device)
74  return -ENOMEM;
75 
76  platform_set_drvdata(em_x270_snd_device, &em_x270);
77  ret = platform_device_add(em_x270_snd_device);
78 
79  if (ret)
80  platform_device_put(em_x270_snd_device);
81 
82  return ret;
83 }
84 
85 static void __exit em_x270_exit(void)
86 {
87  platform_device_unregister(em_x270_snd_device);
88 }
89 
90 module_init(em_x270_init);
91 module_exit(em_x270_exit);
92 
93 /* Module information */
94 MODULE_AUTHOR("Mike Rapoport");
95 MODULE_DESCRIPTION("ALSA SoC EM-X270, eXeda and CM-X300");
96 MODULE_LICENSE("GPL");