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ALSA: hdac: add extended device driver registration 

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

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Vinod Koul 2015-08-21 15:47:42 +05:30 committed by Takashi Iwai
parent a512f56116
commit d51783c15f
2 changed files with 81 additions and 0 deletions
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15
include/sound/hdaudio_ext.h
View File

@ -173,5 +173,20 @@ struct hdac_ext_device {
#define to_ehdac_device(dev) (container_of((dev), \ #define to_ehdac_device(dev) (container_of((dev), \
struct hdac_ext_device, hdac)) 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 */ #endif /* __SOUND_HDAUDIO_EXT_H */

66
sound/hda/ext/hdac_ext_bus.c
View File

@ -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); 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);