mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
820342aca0
v4l2_async_notifier_add_fwnode_remote_subdev is a convenience function for parsing information on V4L2 fwnode subdevs. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
331 lines
12 KiB
C
331 lines
12 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* V4L2 asynchronous subdevice registration API
|
|
*
|
|
* Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
|
|
*/
|
|
|
|
#ifndef V4L2_ASYNC_H
|
|
#define V4L2_ASYNC_H
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/mutex.h>
|
|
|
|
struct device;
|
|
struct device_node;
|
|
struct v4l2_device;
|
|
struct v4l2_subdev;
|
|
struct v4l2_async_notifier;
|
|
|
|
/**
|
|
* enum v4l2_async_match_type - type of asynchronous subdevice logic to be used
|
|
* in order to identify a match
|
|
*
|
|
* @V4L2_ASYNC_MATCH_CUSTOM: Match will use the logic provided by &struct
|
|
* v4l2_async_subdev.match ops
|
|
* @V4L2_ASYNC_MATCH_DEVNAME: Match will use the device name
|
|
* @V4L2_ASYNC_MATCH_I2C: Match will check for I2C adapter ID and address
|
|
* @V4L2_ASYNC_MATCH_FWNODE: Match will use firmware node
|
|
*
|
|
* This enum is used by the asyncrhronous sub-device logic to define the
|
|
* algorithm that will be used to match an asynchronous device.
|
|
*/
|
|
enum v4l2_async_match_type {
|
|
V4L2_ASYNC_MATCH_CUSTOM,
|
|
V4L2_ASYNC_MATCH_DEVNAME,
|
|
V4L2_ASYNC_MATCH_I2C,
|
|
V4L2_ASYNC_MATCH_FWNODE,
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_async_subdev - sub-device descriptor, as known to a bridge
|
|
*
|
|
* @match_type: type of match that will be used
|
|
* @match: union of per-bus type matching data sets
|
|
* @match.fwnode:
|
|
* pointer to &struct fwnode_handle to be matched.
|
|
* Used if @match_type is %V4L2_ASYNC_MATCH_FWNODE.
|
|
* @match.device_name:
|
|
* string containing the device name to be matched.
|
|
* Used if @match_type is %V4L2_ASYNC_MATCH_DEVNAME.
|
|
* @match.i2c: embedded struct with I2C parameters to be matched.
|
|
* Both @match.i2c.adapter_id and @match.i2c.address
|
|
* should be matched.
|
|
* Used if @match_type is %V4L2_ASYNC_MATCH_I2C.
|
|
* @match.i2c.adapter_id:
|
|
* I2C adapter ID to be matched.
|
|
* Used if @match_type is %V4L2_ASYNC_MATCH_I2C.
|
|
* @match.i2c.address:
|
|
* I2C address to be matched.
|
|
* Used if @match_type is %V4L2_ASYNC_MATCH_I2C.
|
|
* @match.custom:
|
|
* Driver-specific match criteria.
|
|
* Used if @match_type is %V4L2_ASYNC_MATCH_CUSTOM.
|
|
* @match.custom.match:
|
|
* Driver-specific match function to be used if
|
|
* %V4L2_ASYNC_MATCH_CUSTOM.
|
|
* @match.custom.priv:
|
|
* Driver-specific private struct with match parameters
|
|
* to be used if %V4L2_ASYNC_MATCH_CUSTOM.
|
|
* @asd_list: used to add struct v4l2_async_subdev objects to the
|
|
* master notifier @asd_list
|
|
* @list: used to link struct v4l2_async_subdev objects, waiting to be
|
|
* probed, to a notifier->waiting list
|
|
*
|
|
* When this struct is used as a member in a driver specific struct,
|
|
* the driver specific struct shall contain the &struct
|
|
* v4l2_async_subdev as its first member.
|
|
*/
|
|
struct v4l2_async_subdev {
|
|
enum v4l2_async_match_type match_type;
|
|
union {
|
|
struct fwnode_handle *fwnode;
|
|
const char *device_name;
|
|
struct {
|
|
int adapter_id;
|
|
unsigned short address;
|
|
} i2c;
|
|
struct {
|
|
bool (*match)(struct device *dev,
|
|
struct v4l2_async_subdev *sd);
|
|
void *priv;
|
|
} custom;
|
|
} match;
|
|
|
|
/* v4l2-async core private: not to be used by drivers */
|
|
struct list_head list;
|
|
struct list_head asd_list;
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_async_notifier_operations - Asynchronous V4L2 notifier operations
|
|
* @bound: a subdevice driver has successfully probed one of the subdevices
|
|
* @complete: All subdevices have been probed successfully. The complete
|
|
* callback is only executed for the root notifier.
|
|
* @unbind: a subdevice is leaving
|
|
*/
|
|
struct v4l2_async_notifier_operations {
|
|
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);
|
|
};
|
|
|
|
/**
|
|
* struct v4l2_async_notifier - v4l2_device notifier data
|
|
*
|
|
* @ops: notifier operations
|
|
* @v4l2_dev: v4l2_device of the root notifier, NULL otherwise
|
|
* @sd: sub-device that registered the notifier, NULL otherwise
|
|
* @parent: parent notifier
|
|
* @asd_list: master list of struct v4l2_async_subdev
|
|
* @waiting: list of struct v4l2_async_subdev, waiting for their drivers
|
|
* @done: list of struct v4l2_subdev, already probed
|
|
* @list: member in a global list of notifiers
|
|
*/
|
|
struct v4l2_async_notifier {
|
|
const struct v4l2_async_notifier_operations *ops;
|
|
struct v4l2_device *v4l2_dev;
|
|
struct v4l2_subdev *sd;
|
|
struct v4l2_async_notifier *parent;
|
|
struct list_head asd_list;
|
|
struct list_head waiting;
|
|
struct list_head done;
|
|
struct list_head list;
|
|
};
|
|
|
|
/**
|
|
* v4l2_async_notifier_init - Initialize a notifier.
|
|
*
|
|
* @notifier: pointer to &struct v4l2_async_notifier
|
|
*
|
|
* This function initializes the notifier @asd_list. It must be called
|
|
* before the first call to @v4l2_async_notifier_add_subdev.
|
|
*/
|
|
void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier);
|
|
|
|
/**
|
|
* v4l2_async_notifier_add_subdev - Add an async subdev to the
|
|
* notifier's master asd list.
|
|
*
|
|
* @notifier: pointer to &struct v4l2_async_notifier
|
|
* @asd: pointer to &struct v4l2_async_subdev
|
|
*
|
|
* Call this function before registering a notifier to link the
|
|
* provided asd to the notifiers master @asd_list.
|
|
*/
|
|
int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
|
|
struct v4l2_async_subdev *asd);
|
|
|
|
/**
|
|
* v4l2_async_notifier_add_fwnode_subdev - Allocate and add a fwnode async
|
|
* subdev to the notifier's master asd_list.
|
|
*
|
|
* @notifier: pointer to &struct v4l2_async_notifier
|
|
* @fwnode: fwnode handle of the sub-device to be matched
|
|
* @asd_struct_size: size of the driver's async sub-device struct, including
|
|
* sizeof(struct v4l2_async_subdev). The &struct
|
|
* v4l2_async_subdev shall be the first member of
|
|
* the driver's async sub-device struct, i.e. both
|
|
* begin at the same memory address.
|
|
*
|
|
* Allocate a fwnode-matched asd of size asd_struct_size, and add it to the
|
|
* notifiers @asd_list. The function also gets a reference of the fwnode which
|
|
* is released later at notifier cleanup time.
|
|
*/
|
|
struct v4l2_async_subdev *
|
|
v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
|
|
struct fwnode_handle *fwnode,
|
|
unsigned int asd_struct_size);
|
|
|
|
/**
|
|
* v4l2_async_notifier_add_fwnode_remote_subdev - Allocate and add a fwnode
|
|
* remote async subdev to the
|
|
* notifier's master asd_list.
|
|
*
|
|
* @notif: pointer to &struct v4l2_async_notifier
|
|
* @endpoint: local endpoint pointing to the remote sub-device to be matched
|
|
* @asd: Async sub-device struct allocated by the caller. The &struct
|
|
* v4l2_async_subdev shall be the first member of the driver's async
|
|
* sub-device struct, i.e. both begin at the same memory address.
|
|
*
|
|
* Gets the remote endpoint of a given local endpoint, set it up for fwnode
|
|
* matching and adds the async sub-device to the notifier's @asd_list. The
|
|
* function also gets a reference of the fwnode which is released later at
|
|
* notifier cleanup time.
|
|
*
|
|
* This is just like @v4l2_async_notifier_add_fwnode_subdev, but with the
|
|
* exception that the fwnode refers to a local endpoint, not the remote one, and
|
|
* the function relies on the caller to allocate the async sub-device struct.
|
|
*/
|
|
int
|
|
v4l2_async_notifier_add_fwnode_remote_subdev(struct v4l2_async_notifier *notif,
|
|
struct fwnode_handle *endpoint,
|
|
struct v4l2_async_subdev *asd);
|
|
|
|
/**
|
|
* v4l2_async_notifier_add_i2c_subdev - Allocate and add an i2c async
|
|
* subdev to the notifier's master asd_list.
|
|
*
|
|
* @notifier: pointer to &struct v4l2_async_notifier
|
|
* @adapter_id: I2C adapter ID to be matched
|
|
* @address: I2C address of sub-device to be matched
|
|
* @asd_struct_size: size of the driver's async sub-device struct, including
|
|
* sizeof(struct v4l2_async_subdev). The &struct
|
|
* v4l2_async_subdev shall be the first member of
|
|
* the driver's async sub-device struct, i.e. both
|
|
* begin at the same memory address.
|
|
*
|
|
* Same as above but for I2C matched sub-devices.
|
|
*/
|
|
struct v4l2_async_subdev *
|
|
v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
|
|
int adapter_id, unsigned short address,
|
|
unsigned int asd_struct_size);
|
|
|
|
/**
|
|
* v4l2_async_notifier_add_devname_subdev - Allocate and add a device-name
|
|
* async subdev to the notifier's master asd_list.
|
|
*
|
|
* @notifier: pointer to &struct v4l2_async_notifier
|
|
* @device_name: device name string to be matched
|
|
* @asd_struct_size: size of the driver's async sub-device struct, including
|
|
* sizeof(struct v4l2_async_subdev). The &struct
|
|
* v4l2_async_subdev shall be the first member of
|
|
* the driver's async sub-device struct, i.e. both
|
|
* begin at the same memory address.
|
|
*
|
|
* Same as above but for device-name matched sub-devices.
|
|
*/
|
|
struct v4l2_async_subdev *
|
|
v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier,
|
|
const char *device_name,
|
|
unsigned int asd_struct_size);
|
|
|
|
/**
|
|
* v4l2_async_notifier_register - registers a subdevice asynchronous notifier
|
|
*
|
|
* @v4l2_dev: pointer to &struct v4l2_device
|
|
* @notifier: pointer to &struct v4l2_async_notifier
|
|
*/
|
|
int v4l2_async_notifier_register(struct v4l2_device *v4l2_dev,
|
|
struct v4l2_async_notifier *notifier);
|
|
|
|
/**
|
|
* v4l2_async_subdev_notifier_register - registers a subdevice asynchronous
|
|
* notifier for a sub-device
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
* @notifier: pointer to &struct v4l2_async_notifier
|
|
*/
|
|
int v4l2_async_subdev_notifier_register(struct v4l2_subdev *sd,
|
|
struct v4l2_async_notifier *notifier);
|
|
|
|
/**
|
|
* v4l2_async_notifier_unregister - unregisters a subdevice
|
|
* asynchronous notifier
|
|
*
|
|
* @notifier: pointer to &struct v4l2_async_notifier
|
|
*/
|
|
void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier);
|
|
|
|
/**
|
|
* v4l2_async_notifier_cleanup - clean up notifier resources
|
|
* @notifier: the notifier the resources of which are to be cleaned up
|
|
*
|
|
* Release memory resources related to a notifier, including the async
|
|
* sub-devices allocated for the purposes of the notifier but not the notifier
|
|
* itself. The user is responsible for calling this function to clean up the
|
|
* notifier after calling
|
|
* @v4l2_async_notifier_add_subdev,
|
|
* @v4l2_async_notifier_parse_fwnode_endpoints or
|
|
* @v4l2_fwnode_reference_parse_sensor_common.
|
|
*
|
|
* There is no harm from calling v4l2_async_notifier_cleanup in other
|
|
* cases as long as its memory has been zeroed after it has been
|
|
* allocated.
|
|
*/
|
|
void v4l2_async_notifier_cleanup(struct v4l2_async_notifier *notifier);
|
|
|
|
/**
|
|
* v4l2_async_register_subdev - registers a sub-device to the asynchronous
|
|
* subdevice framework
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
*/
|
|
int v4l2_async_register_subdev(struct v4l2_subdev *sd);
|
|
|
|
/**
|
|
* v4l2_async_register_subdev_sensor_common - registers a sensor sub-device to
|
|
* the asynchronous sub-device
|
|
* framework and parse set up common
|
|
* sensor related devices
|
|
*
|
|
* @sd: pointer to struct &v4l2_subdev
|
|
*
|
|
* This function is just like v4l2_async_register_subdev() with the exception
|
|
* that calling it will also parse firmware interfaces for remote references
|
|
* using v4l2_async_notifier_parse_fwnode_sensor_common() and registers the
|
|
* async sub-devices. The sub-device is similarly unregistered by calling
|
|
* v4l2_async_unregister_subdev().
|
|
*
|
|
* While registered, the subdev module is marked as in-use.
|
|
*
|
|
* An error is returned if the module is no longer loaded on any attempts
|
|
* to register it.
|
|
*/
|
|
int __must_check
|
|
v4l2_async_register_subdev_sensor_common(struct v4l2_subdev *sd);
|
|
|
|
/**
|
|
* v4l2_async_unregister_subdev - unregisters a sub-device to the asynchronous
|
|
* subdevice framework
|
|
*
|
|
* @sd: pointer to &struct v4l2_subdev
|
|
*/
|
|
void v4l2_async_unregister_subdev(struct v4l2_subdev *sd);
|
|
#endif
|