projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| e9e31049 GL |
1 | /* |
| 2 | * V4L2 asynchronous subdevice registration API | |
| 3 | * | |
| 4 | * Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef V4L2_ASYNC_H | |
| 12 | #define V4L2_ASYNC_H | |
| 13 | ||
| 14 | #include <linux/list.h> | |
| 15 | #include <linux/mutex.h> | |
| 16 | ||
| 17 | struct device; | |
| e7359f8e | 18 | struct device_node; |
| e9e31049 GL |
19 | struct v4l2_device; |
| 20 | struct v4l2_subdev; | |
| 21 | struct v4l2_async_notifier; | |
| 22 | ||
| 23 | /* A random max subdevice number, used to allocate an array on stack */ | |
| 24 | #define V4L2_MAX_SUBDEVS 128U | |
| 25 | ||
| cfca7644 SN |
26 | enum v4l2_async_match_type { |
| 27 | V4L2_ASYNC_MATCH_CUSTOM, | |
| 28 | V4L2_ASYNC_MATCH_DEVNAME, | |
| 29 | V4L2_ASYNC_MATCH_I2C, | |
| e7359f8e | 30 | V4L2_ASYNC_MATCH_OF, |
| e9e31049 GL |
31 | }; |
| 32 | ||
| 33 | /** | |
| 34 | * struct v4l2_async_subdev - sub-device descriptor, as known to a bridge | |
| 35 | * @bus_type: subdevice bus type to select the appropriate matching method | |
| 36 | * @match: union of per-bus type matching data sets | |
| 37 | * @list: used to link struct v4l2_async_subdev objects, waiting to be | |
| 38 | * probed, to a notifier->waiting list | |
| 39 | */ | |
| 40 | struct v4l2_async_subdev { | |
| cfca7644 | 41 | enum v4l2_async_match_type match_type; |
| e9e31049 | 42 | union { |
| e7359f8e SN |
43 | struct { |
| 44 | const struct device_node *node; | |
| 45 | } of; | |
| e9e31049 GL |
46 | struct { |
| 47 | const char *name; | |
| cfca7644 | 48 | } device_name; |
| e9e31049 GL |
49 | struct { |
| 50 | int adapter_id; | |
| 51 | unsigned short address; | |
| 52 | } i2c; | |
| 53 | struct { | |
| 54 | bool (*match)(struct device *, | |
| 55 | struct v4l2_async_subdev *); | |
| 56 | void *priv; | |
| 57 | } custom; | |
| 58 | } match; | |
| 59 | ||
| 60 | /* v4l2-async core private: not to be used by drivers */ | |
| 61 | struct list_head list; | |
| 62 | }; | |
| 63 | ||
| e9e31049 GL |
64 | /** |
| 65 | * v4l2_async_notifier - v4l2_device notifier data | |
| 66 | * @num_subdevs:number of subdevices | |
| e8419d08 | 67 | * @subdevs: array of pointers to subdevice descriptors |
| e9e31049 GL |
68 | * @v4l2_dev: pointer to struct v4l2_device |
| 69 | * @waiting: list of struct v4l2_async_subdev, waiting for their drivers | |
| b426b3a6 | 70 | * @done: list of struct v4l2_subdev, already probed |
| e9e31049 GL |
71 | * @list: member in a global list of notifiers |
| 72 | * @bound: a subdevice driver has successfully probed one of subdevices | |
| 73 | * @complete: all subdevices have been probed successfully | |
| 74 | * @unbind: a subdevice is leaving | |
| 75 | */ | |
| 76 | struct v4l2_async_notifier { | |
| 77 | unsigned int num_subdevs; | |
| e8419d08 | 78 | struct v4l2_async_subdev **subdevs; |
| e9e31049 GL |
79 | struct v4l2_device *v4l2_dev; |
| 80 | struct list_head waiting; | |
| 81 | struct list_head done; | |
| 82 | struct list_head list; | |
| 83 | int (*bound)(struct v4l2_async_notifier *notifier, | |
| 84 | struct v4l2_subdev *subdev, | |
| 85 | struct v4l2_async_subdev *asd); | |
| 86 | int (*complete)(struct v4l2_async_notifier *notifier); | |
| 87 | void (*unbind)(struct v4l2_async_notifier *notifier, | |
| 88 | struct v4l2_subdev *subdev, | |
| 89 | struct v4l2_async_subdev *asd); | |
| 90 | }; | |
| 91 | ||
| 92 | int v4l2_async_notifier_register(struct v4l2_device *v4l2_dev, | |
| 93 | struct v4l2_async_notifier *notifier); | |
| 94 | void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier); | |
| 95 | int v4l2_async_register_subdev(struct v4l2_subdev *sd); | |
| 96 | void v4l2_async_unregister_subdev(struct v4l2_subdev *sd); | |
| 97 | #endif |