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Commit d51783c1 authored by Vinod Koul's avatar Vinod Koul Committed by Takashi Iwai
Browse files

ALSA: hdac: add extended device driver registration 



This adds new extended driver objects and API for registering the
extended devices.

Signed-off-by: default avatarSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent a512f561

include/sound/hdaudio_ext.h

+15 −0
Original line number Diff line number Diff line
@@ -173,5 +173,20 @@ struct hdac_ext_device { 


#define to_ehdac_device(dev) (container_of((dev), \

				 struct hdac_ext_device, hdac))

/*

 * HD-audio codec base driver

 */

struct hdac_ext_driver {

	struct hdac_driver hdac;



	int	(*probe)(struct hdac_ext_device *dev);

	int	(*remove)(struct hdac_ext_device *dev);

	void	(*shutdown)(struct hdac_ext_device *dev);

};



int snd_hda_ext_driver_register(struct hdac_ext_driver *drv);

void snd_hda_ext_driver_unregister(struct hdac_ext_driver *drv);



#define to_ehdac_driver(_drv) container_of(_drv, struct hdac_ext_driver, hdac)



#endif /* __SOUND_HDAUDIO_EXT_H */

sound/hda/ext/hdac_ext_bus.c

+66 −0
Original line number Diff line number Diff line
@@ -196,3 +196,69 @@ void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus) 
	}

}

EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);

#define dev_to_hdac(dev) (container_of((dev), \

			struct hdac_device, dev))



static inline struct hdac_ext_driver *get_edrv(struct device *dev)

{

	struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver);

	struct hdac_ext_driver *edrv = to_ehdac_driver(hdrv);



	return edrv;

}



static inline struct hdac_ext_device *get_edev(struct device *dev)

{

	struct hdac_device *hdev = dev_to_hdac_dev(dev);

	struct hdac_ext_device *edev = to_ehdac_device(hdev);



	return edev;

}



static int hda_ext_drv_probe(struct device *dev)

{

	return (get_edrv(dev))->probe(get_edev(dev));

}



static int hdac_ext_drv_remove(struct device *dev)

{

	return (get_edrv(dev))->remove(get_edev(dev));

}



static void hdac_ext_drv_shutdown(struct device *dev)

{

	return (get_edrv(dev))->shutdown(get_edev(dev));

}



/**

 * snd_hda_ext_driver_register - register a driver for ext hda devices

 *

 * @drv: ext hda driver structure

 */

int snd_hda_ext_driver_register(struct hdac_ext_driver *drv)

{

	drv->hdac.type = HDA_DEV_ASOC;

	drv->hdac.driver.bus = &snd_hda_bus_type;

	/* we use default match */



	if (drv->probe)

		drv->hdac.driver.probe = hda_ext_drv_probe;

	if (drv->remove)

		drv->hdac.driver.remove = hdac_ext_drv_remove;

	if (drv->shutdown)

		drv->hdac.driver.shutdown = hdac_ext_drv_shutdown;



	return driver_register(&drv->hdac.driver);

}

EXPORT_SYMBOL_GPL(snd_hda_ext_driver_register);



/**

 * snd_hda_ext_driver_unregister - unregister a driver for ext hda devices

 *

 * @drv: ext hda driver structure

 */

void snd_hda_ext_driver_unregister(struct hdac_ext_driver *drv)

{

	driver_unregister(&drv->hdac.driver);

}

EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister);