Commit e3d280fc authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Make snd_hda_bus_type public 



Define the common hd-audio driver and device types to bind over
snd_hda_bus_type publicly.  This allows to implement other type of
device and driver code over hd-audio bus.

Now both struct hda_codec and struct hda_codec_driver inherit these
new struct hdac_device and struct hdac_driver, respectively.

The bus registration is done in subsys_initcall() to assure it
before any other driver registrations.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3372dbdd

include/sound/hdaudio.h

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+42 −0
Original line number Diff line number Diff line 
/*

 * HD-audio core stuff

 */



#ifndef __SOUND_HDAUDIO_H

#define __SOUND_HDAUDIO_H



#include <linux/device.h>



/*

 * exported bus type

 */

extern struct bus_type snd_hda_bus_type;



/*

 * HD-audio codec base device

 */

struct hdac_device {

	struct device dev;

	int type;

};



/* device/driver type used for matching */

enum {

	HDA_DEV_CORE,

	HDA_DEV_LEGACY,

};



#define dev_to_hdac_dev(_dev)	container_of(_dev, struct hdac_device, dev)



/*

 * HD-audio codec base driver

 */

struct hdac_driver {

	struct device_driver driver;

	int type;

	int (*match)(struct hdac_device *dev, struct hdac_driver *drv);

};



#define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)



#endif /* __SOUND_HDAUDIO_H */

sound/Kconfig

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@@ -76,6 +76,8 @@ source "sound/isa/Kconfig" 


source "sound/pci/Kconfig"



source "sound/hda/Kconfig"



source "sound/ppc/Kconfig"



source "sound/aoa/Kconfig"

sound/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ obj-$(CONFIG_SOUND_PRIME) += sound_firmware.o 
obj-$(CONFIG_SOUND_PRIME) += oss/

obj-$(CONFIG_DMASOUND) += oss/

obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \

	firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/

	firewire/ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/ hda/

obj-$(CONFIG_SND_AOA) += aoa/



# This one must be compilable even if sound is configured out

sound/hda/Kconfig

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+2 −0
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config SND_HDA_CORE

	tristate

sound/hda/Makefile

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snd-hda-core-objs := hda_bus_type.o



obj-$(CONFIG_SND_HDA_CORE) += snd-hda-core.o

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