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ALSA: hda - Modularize HD-audio driver

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Split the monolithc HD-audio driver into several pieces:
 - snd-hda-intel   HD-audio PCI controller driver; loaded via udev
 - snd-hda-codec   HD-audio codec bus driver
 - snd-hda-codec-* Specific HD-audio codec drivers

When built as modules, snd-hda-codec (that is invoked by snd-hda-intel)
looks up the codec vendor ID and loads the corresponding codec module
automatically via request_module().

When built in a kernel, each codec drivers are statically hooked up
before probing the PCI.

This patch adds appropriate EXPORT_SYMBOL_GPL()'s and the module
information for each driver, and driver-linking codes between
codec-bus and codec drivers.

TODO:
  - Avoid EXPORT_SYMBOL*() when built-in kernel
  - Restore __devinit appropriately depending on the condition

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2008-11-27 15:47:11 +01:00
parent 30d72e9f61
commit 1289e9e8b4
18 changed files with 528 additions and 109 deletions
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27
sound/pci/hda/patch_cmedia.c
View File

@@ -28,7 +28,6 @@
#include <sound/core.h>
#include "hda_codec.h"
#include "hda_local.h"
#include "hda_patch.h"
#define NUM_PINS 11
@@ -736,8 +735,32 @@ static int patch_cmi9880(struct hda_codec *codec)
/*
* patch entries
*/
struct hda_codec_preset snd_hda_preset_cmedia[] = {
static struct hda_codec_preset snd_hda_preset_cmedia[] = {
{ .id = 0x13f69880, .name = "CMI9880", .patch = patch_cmi9880 },
{ .id = 0x434d4980, .name = "CMI9880", .patch = patch_cmi9880 },
{} /* terminator */
};
MODULE_ALIAS("snd-hda-codec-id:13f69880");
MODULE_ALIAS("snd-hda-codec-id:434d4980");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("C-Media HD-audio codec");
static struct hda_codec_preset_list cmedia_list = {
.preset = snd_hda_preset_cmedia,
.owner = THIS_MODULE,
};
static int __init patch_cmedia_init(void)
{
return snd_hda_add_codec_preset(&cmedia_list);
}
static void __exit patch_cmedia_exit(void)
{
snd_hda_delete_codec_preset(&cmedia_list);
}
module_init(patch_cmedia_init)
module_exit(patch_cmedia_exit)