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d068ebc25e
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>
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
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* HD-audio core stuff
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*/
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#ifndef __SOUND_HDAUDIO_H
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#define __SOUND_HDAUDIO_H
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#include <linux/device.h>
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#include <sound/hda_verbs.h>
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struct hdac_bus;
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struct hdac_device;
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struct hdac_driver;
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/*
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* exported bus type
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*/
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extern struct bus_type snd_hda_bus_type;
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/*
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* HD-audio codec base device
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*/
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struct hdac_device {
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struct device dev;
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int type;
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struct hdac_bus *bus;
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unsigned int addr; /* codec address */
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struct list_head list; /* list point for bus codec_list */
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};
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/* device/driver type used for matching */
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enum {
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HDA_DEV_CORE,
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HDA_DEV_LEGACY,
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};
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#define dev_to_hdac_dev(_dev) container_of(_dev, struct hdac_device, dev)
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/*
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* HD-audio codec base driver
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*/
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struct hdac_driver {
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struct device_driver driver;
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int type;
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int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
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void (*unsol_event)(struct hdac_device *dev, unsigned int event);
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};
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#define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
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/*
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* HD-audio bus base driver
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*/
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struct hdac_bus_ops {
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/* send a single command */
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int (*command)(struct hdac_bus *bus, unsigned int cmd);
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/* get a response from the last command */
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int (*get_response)(struct hdac_bus *bus, unsigned int addr,
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unsigned int *res);
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};
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#define HDA_UNSOL_QUEUE_SIZE 64
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struct hdac_bus {
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struct device *dev;
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const struct hdac_bus_ops *ops;
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/* codec linked list */
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struct list_head codec_list;
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unsigned int num_codecs;
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/* link caddr -> codec */
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struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
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/* unsolicited event queue */
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u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
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unsigned int unsol_rp, unsol_wp;
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struct work_struct unsol_work;
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/* bit flags of powered codecs */
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unsigned long codec_powered;
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/* flags */
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bool sync_write:1; /* sync after verb write */
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/* locks */
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struct mutex cmd_mutex;
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};
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int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
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const struct hdac_bus_ops *ops);
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void snd_hdac_bus_exit(struct hdac_bus *bus);
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int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
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unsigned int cmd, unsigned int *res);
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int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
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unsigned int cmd, unsigned int *res);
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void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
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int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
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void snd_hdac_bus_remove_device(struct hdac_bus *bus,
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struct hdac_device *codec);
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#endif /* __SOUND_HDAUDIO_H */
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