ALSA: hda - Move some codes up to hdac_bus struct

A few basic codes for communicating over HD-audio bus are moved to
struct hdac_bus now.  It has only command and get_response ops in
addition to the unsolicited event handling.

Note that the codec-side tracing support is disabled temporarily
during this transition due to the code shuffling.  It will be
re-enabled later once when all pieces are settled down.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 61 insertions, 0 deletions

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 2381509bee9f..848ab6e68099 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -6,6 +6,11 @@
 #define __SOUND_HDAUDIO_H
 
 #include <linux/device.h>
+#include <sound/hda_verbs.h>
+
+struct hdac_bus;
+struct hdac_device;
+struct hdac_driver;
 
 /*
  * exported bus type
@@ -18,6 +23,9 @@ extern struct bus_type snd_hda_bus_type;
 struct hdac_device {
 	struct device dev;
 	int type;
+	struct hdac_bus *bus;
+	unsigned int addr;		/* codec address */
+	struct list_head list;		/* list point for bus codec_list */
 };
 
 /* device/driver type used for matching */
@@ -35,8 +43,61 @@ struct hdac_driver {
 	struct device_driver driver;
 	int type;
 	int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
+	void (*unsol_event)(struct hdac_device *dev, unsigned int event);
 };
 
 #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
 
+/*
+ * HD-audio bus base driver
+ */
+struct hdac_bus_ops {
+	/* send a single command */
+	int (*command)(struct hdac_bus *bus, unsigned int cmd);
+	/* get a response from the last command */
+	int (*get_response)(struct hdac_bus *bus, unsigned int addr,
+			    unsigned int *res);
+};
+
+#define HDA_UNSOL_QUEUE_SIZE	64
+
+struct hdac_bus {
+	struct device *dev;
+	const struct hdac_bus_ops *ops;
+
+	/* codec linked list */
+	struct list_head codec_list;
+	unsigned int num_codecs;
+
+	/* link caddr -> codec */
+	struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
+
+	/* unsolicited event queue */
+	u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
+	unsigned int unsol_rp, unsol_wp;
+	struct work_struct unsol_work;
+
+	/* bit flags of powered codecs */
+	unsigned long codec_powered;
+
+	/* flags */
+	bool sync_write:1;		/* sync after verb write */
+
+	/* locks */
+	struct mutex cmd_mutex;
+};
+
+int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
+		      const struct hdac_bus_ops *ops);
+void snd_hdac_bus_exit(struct hdac_bus *bus);
+int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
+			   unsigned int cmd, unsigned int *res);
+int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
+				    unsigned int cmd, unsigned int *res);
+void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
+
+int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
+void snd_hdac_bus_remove_device(struct hdac_bus *bus,
+				struct hdac_device *codec);
+
 #endif /* __SOUND_HDAUDIO_H */