106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*
|
|
* V4L2 asynchronous subdevice registration API
|
|
*
|
|
* Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef V4L2_ASYNC_H
|
|
#define V4L2_ASYNC_H
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/mutex.h>
|
|
|
|
struct device;
|
|
struct v4l2_device;
|
|
struct v4l2_subdev;
|
|
struct v4l2_async_notifier;
|
|
|
|
/* A random max subdevice number, used to allocate an array on stack */
|
|
#define V4L2_MAX_SUBDEVS 128U
|
|
|
|
enum v4l2_async_bus_type {
|
|
V4L2_ASYNC_BUS_CUSTOM,
|
|
V4L2_ASYNC_BUS_PLATFORM,
|
|
V4L2_ASYNC_BUS_I2C,
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_async_subdev - sub-device descriptor, as known to a bridge
|
|
* @bus_type: subdevice bus type to select the appropriate matching method
|
|
* @match: union of per-bus type matching data sets
|
|
* @list: used to link struct v4l2_async_subdev objects, waiting to be
|
|
* probed, to a notifier->waiting list
|
|
*/
|
|
struct v4l2_async_subdev {
|
|
enum v4l2_async_bus_type bus_type;
|
|
union {
|
|
struct {
|
|
const char *name;
|
|
} platform;
|
|
struct {
|
|
int adapter_id;
|
|
unsigned short address;
|
|
} i2c;
|
|
struct {
|
|
bool (*match)(struct device *,
|
|
struct v4l2_async_subdev *);
|
|
void *priv;
|
|
} custom;
|
|
} match;
|
|
|
|
/* v4l2-async core private: not to be used by drivers */
|
|
struct list_head list;
|
|
};
|
|
|
|
/**
|
|
* v4l2_async_subdev_list - provided by subdevices
|
|
* @list: links struct v4l2_async_subdev_list objects to a global list
|
|
* before probing, and onto notifier->done after probing
|
|
* @asd: pointer to respective struct v4l2_async_subdev
|
|
* @notifier: pointer to managing notifier
|
|
*/
|
|
struct v4l2_async_subdev_list {
|
|
struct list_head list;
|
|
struct v4l2_async_subdev *asd;
|
|
struct v4l2_async_notifier *notifier;
|
|
};
|
|
|
|
/**
|
|
* v4l2_async_notifier - v4l2_device notifier data
|
|
* @num_subdevs:number of subdevices
|
|
* @subdev: array of pointers to subdevice descriptors
|
|
* @v4l2_dev: pointer to struct v4l2_device
|
|
* @waiting: list of struct v4l2_async_subdev, waiting for their drivers
|
|
* @done: list of struct v4l2_async_subdev_list, already probed
|
|
* @list: member in a global list of notifiers
|
|
* @bound: a subdevice driver has successfully probed one of subdevices
|
|
* @complete: all subdevices have been probed successfully
|
|
* @unbind: a subdevice is leaving
|
|
*/
|
|
struct v4l2_async_notifier {
|
|
unsigned int num_subdevs;
|
|
struct v4l2_async_subdev **subdev;
|
|
struct v4l2_device *v4l2_dev;
|
|
struct list_head waiting;
|
|
struct list_head done;
|
|
struct list_head list;
|
|
int (*bound)(struct v4l2_async_notifier *notifier,
|
|
struct v4l2_subdev *subdev,
|
|
struct v4l2_async_subdev *asd);
|
|
int (*complete)(struct v4l2_async_notifier *notifier);
|
|
void (*unbind)(struct v4l2_async_notifier *notifier,
|
|
struct v4l2_subdev *subdev,
|
|
struct v4l2_async_subdev *asd);
|
|
};
|
|
|
|
int v4l2_async_notifier_register(struct v4l2_device *v4l2_dev,
|
|
struct v4l2_async_notifier *notifier);
|
|
void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier);
|
|
int v4l2_async_register_subdev(struct v4l2_subdev *sd);
|
|
void v4l2_async_unregister_subdev(struct v4l2_subdev *sd);
|
|
#endif
|