ALSA: hdac: add hdac extended device

This adds based hdac extended device object which will be used by
ASoC HDAC codecs

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/hdaudio_ext.h

@@ -130,4 +130,48 @@ void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
 	writew(((readw(addr + reg) & ~(mask)) | (val)), \
 		addr + reg)
 
+
+struct hdac_ext_device;
+
+/* ops common to all codec drivers */
+struct hdac_ext_codec_ops {
+	int (*build_controls)(struct hdac_ext_device *dev);
+	int (*init)(struct hdac_ext_device *dev);
+	void (*free)(struct hdac_ext_device *dev);
+};
+
+struct hda_dai_map {
+	char *dai_name;
+	hda_nid_t nid;
+	u32	maxbps;
+};
+
+#define HDA_MAX_NIDS 16
+
+/**
+ * struct hdac_ext_device - HDAC Ext device
+ *
+ * @hdac: hdac core device
+ * @nid_list - the dai map which matches the dai-name with the nid
+ * @map_cur_idx - the idx in use in dai_map
+ * @ops - the hda codec ops common to all codec drivers
+ * @pvt_data - private data, for asoc contains asoc codec object
+ */
+struct hdac_ext_device {
+	struct hdac_device hdac;
+	struct hdac_ext_bus *ebus;
+
+	/* soc-dai to nid map */
+	struct hda_dai_map nid_list[HDA_MAX_NIDS];
+	unsigned int map_cur_idx;
+
+	/* codec ops */
+	struct hdac_ext_codec_ops ops;
+
+	void *private_data;
+};
+
+#define to_ehdac_device(dev) (container_of((dev), \
+				 struct hdac_ext_device, hdac))
+
 #endif /* __SOUND_HDAUDIO_EXT_H */

sound/hda/ext/hdac_ext_bus.c

@@ -125,22 +125,24 @@ static void default_release(struct device *dev)
 }
 
 /**
- * snd_hdac_ext_device_init - initialize the HDA extended codec base device
+ * snd_hdac_ext_bus_device_init - initialize the HDA extended codec base device
  * @ebus: hdac extended bus to attach to
  * @addr: codec address
  *
  * Returns zero for success or a negative error code.
  */
 int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
 {
+	struct hdac_ext_device *edev;
 	struct hdac_device *hdev = NULL;
 	struct hdac_bus *bus = ebus_to_hbus(ebus);
 	char name[15];
 	int ret;
 
-	hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
-	if (!hdev)
+	edev = kzalloc(sizeof(*hdev), GFP_KERNEL);
+	if (!edev)
 		return -ENOMEM;
+	hdev = &edev->hdac;
 
 	snprintf(name, sizeof(name), "ehdaudio%dD%d", ebus->idx, addr);
 
@@ -158,6 +160,7 @@ int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
 		snd_hdac_ext_bus_device_exit(hdev);
 		return ret;
 	}
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
@@ -168,8 +171,10 @@ EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
  */
 void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
 {
+	struct hdac_ext_device *edev = to_ehdac_device(hdev);
+
 	snd_hdac_device_exit(hdev);
-	kfree(hdev);
+	kfree(edev);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);