D7net
Home
Console
Upload
information
Create File
Create Folder
About
Tools
:
/
usr
/
lib
/
modules
/
5.4.0-216-generic
/
build
/
include
/
sound
/
ac97
/
Filename :
controller.h
back
Copy
/* SPDX-License-Identifier: GPL-2.0 * * Copyright (C) 2016 Robert Jarzmik <robert.jarzmik@free.fr> */ #ifndef AC97_CONTROLLER_H #define AC97_CONTROLLER_H #include <linux/device.h> #include <linux/list.h> #define AC97_BUS_MAX_CODECS 4 #define AC97_SLOTS_AVAILABLE_ALL 0xf struct ac97_controller_ops; /** * struct ac97_controller - The AC97 controller of the AC-Link * @ops: the AC97 operations. * @controllers: linked list of all existing controllers. * @adap: the shell device ac97-%d, ie. ac97 adapter * @nr: the number of the shell device * @slots_available: the mask of accessible/scanable codecs. * @parent: the device providing the AC97 controller. * @codecs: the 4 possible AC97 codecs (NULL if none found). * @codecs_pdata: platform_data for each codec (NULL if no pdata). * * This structure is internal to AC97 bus, and should not be used by the * controllers themselves, excepting for using @dev. */ struct ac97_controller { const struct ac97_controller_ops *ops; struct list_head controllers; struct device adap; int nr; unsigned short slots_available; struct device *parent; struct ac97_codec_device *codecs[AC97_BUS_MAX_CODECS]; void *codecs_pdata[AC97_BUS_MAX_CODECS]; }; /** * struct ac97_controller_ops - The AC97 operations * @reset: Cold reset of the AC97 AC-Link. * @warm_reset: Warm reset of the AC97 AC-Link. * @read: Read of a single AC97 register. * Returns the register value or a negative error code. * @write: Write of a single AC97 register. * * These are the basic operation an AC97 controller must provide for an AC97 * access functions. Amongst these, all but the last 2 are mandatory. * The slot number is also known as the AC97 codec number, between 0 and 3. */ struct ac97_controller_ops { void (*reset)(struct ac97_controller *adrv); void (*warm_reset)(struct ac97_controller *adrv); int (*write)(struct ac97_controller *adrv, int slot, unsigned short reg, unsigned short val); int (*read)(struct ac97_controller *adrv, int slot, unsigned short reg); }; #if IS_ENABLED(CONFIG_AC97_BUS_NEW) struct ac97_controller *snd_ac97_controller_register( const struct ac97_controller_ops *ops, struct device *dev, unsigned short slots_available, void **codecs_pdata); void snd_ac97_controller_unregister(struct ac97_controller *ac97_ctrl); #else static inline struct ac97_controller * snd_ac97_controller_register(const struct ac97_controller_ops *ops, struct device *dev, unsigned short slots_available, void **codecs_pdata) { return ERR_PTR(-ENODEV); } static inline void snd_ac97_controller_unregister(struct ac97_controller *ac97_ctrl) { } #endif #endif