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/*
* HD-audio core stuff
*/
#ifndef __SOUND_HDAUDIO_H
#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
*/
extern struct bus_type snd_hda_bus_type;
/*
* HD-audio codec base device
*/
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 */
enum {
HDA_DEV_CORE,
HDA_DEV_LEGACY,
};
#define dev_to_hdac_dev(_dev) container_of(_dev, struct hdac_device, dev)
/*
* HD-audio codec base driver
*/
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 */
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