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authorVinod Koul <vinod.koul@intel.com>2015-08-21 15:47:42 +0530
committerTakashi Iwai <tiwai@suse.de>2015-08-21 12:34:02 +0200
commitd51783c15f7548229e49331d254a738be8ac865c (patch)
tree5417516e6bbab6720a2af68882a21d52b8a050bd
parenta512f5611646ab12f3f8fea2a3d2582adabe5157 (diff)
downloadlinux-d51783c15f7548229e49331d254a738be8ac865c.tar.bz2
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>
-rw-r--r--include/sound/hdaudio_ext.h15
-rw-r--r--sound/hda/ext/hdac_ext_bus.c66
2 files changed, 81 insertions, 0 deletions
diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index 0641d00e2a94..55e2fc36177f 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -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 */
diff --git a/sound/hda/ext/hdac_ext_bus.c b/sound/hda/ext/hdac_ext_bus.c
index 94fb9878f5cb..8544e4fb1cd3 100644
--- a/sound/hda/ext/hdac_ext_bus.c
+++ b/sound/hda/ext/hdac_ext_bus.c
@@ -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);