| Jing Zhou | 076a309 | 2017-02-27 02:43:03 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2017, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _CAM_SUBDEV_H_ |
| 14 | #define _CAM_SUBDEV_H_ |
| 15 | |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <media/v4l2-fh.h> |
| 19 | #include <media/v4l2-device.h> |
| 20 | #include <media/v4l2-subdev.h> |
| 21 | #include <media/v4l2-event.h> |
| 22 | #include <media/v4l2-ioctl.h> |
| 23 | |
| 24 | #define CAM_SUBDEVICE_EVENT_MAX 30 |
| 25 | |
| 26 | /** |
| 27 | * struct cam_subdev - describes a camera sub-device |
| 28 | * |
| 29 | * @pdev: Pointer to the platform device |
| 30 | * @sd: V4l2 subdevice |
| 31 | * @ops: V4l2 subdecie operations |
| 32 | * @internal_ops: V4l2 subdevice internal operations |
| 33 | * @name: Name of the sub-device. Please notice that the name |
| 34 | * must be unique. |
| 35 | * @sd_flags: Subdev flags. Can be: |
| 36 | * %V4L2_SUBDEV_FL_HAS_DEVNODE - Set this flag if |
| 37 | * this subdev needs a device node. |
| 38 | * %V4L2_SUBDEV_FL_HAS_EVENTS - Set this flag if |
| 39 | * this subdev generates events. |
| 40 | * @token: Pointer to cookie of the client driver |
| 41 | * @ent_function: Media entity function type. Can be: |
| 42 | * %CAM_IFE_DEVICE_TYPE - identifies as IFE device. |
| 43 | * %CAM_ICP_DEVICE_TYPE - identifies as ICP device. |
| 44 | * |
| 45 | * Each instance of a subdev driver should create this struct, either |
| 46 | * stand-alone or embedded in a larger struct. This structure should be |
| 47 | * initialized/registered by cam_register_subdev |
| 48 | * |
| 49 | */ |
| 50 | struct cam_subdev { |
| 51 | struct platform_device *pdev; |
| 52 | struct v4l2_subdev sd; |
| 53 | const struct v4l2_subdev_ops *ops; |
| 54 | const struct v4l2_subdev_internal_ops *internal_ops; |
| 55 | char *name; |
| 56 | u32 sd_flags; |
| 57 | void *token; |
| 58 | u32 ent_function; |
| 59 | }; |
| 60 | |
| 61 | /** |
| 62 | * cam_subdev_probe() |
| 63 | * |
| 64 | * @brief: Camera Subdevice node probe function for v4l2 setup |
| 65 | * |
| 66 | * @sd: Camera subdevice object |
| 67 | * @name: Name of the subdevice node |
| 68 | * @dev_type: Subdevice node type |
| 69 | * |
| 70 | */ |
| 71 | int cam_subdev_probe(struct cam_subdev *sd, struct platform_device *pdev, |
| 72 | char *name, uint32_t dev_type); |
| 73 | |
| 74 | /** |
| 75 | * cam_subdev_remove() |
| 76 | * |
| 77 | * @brief: Called when subdevice node is unloaded |
| 78 | * |
| 79 | * @sd: Camera subdevice node object |
| 80 | * |
| 81 | */ |
| 82 | int cam_subdev_remove(struct cam_subdev *sd); |
| 83 | |
| 84 | /** |
| Viswanadha Raju Thotakura | 08b5081 | 2017-08-25 14:52:32 -0700 | [diff] [blame] | 85 | * cam_register_subdev_fops() |
| 86 | * |
| 87 | * @brief: This common utility function assigns subdev ops |
| 88 | * |
| 89 | * @fops: v4l file operations |
| 90 | */ |
| 91 | void cam_register_subdev_fops(struct v4l2_file_operations *fops); |
| 92 | |
| 93 | /** |
| Jing Zhou | 076a309 | 2017-02-27 02:43:03 -0800 | [diff] [blame] | 94 | * cam_register_subdev() |
| 95 | * |
| 96 | * @brief: This is the common utility function to be called by each camera |
| 97 | * subdevice node when it tries to register itself to the camera |
| 98 | * request manager |
| 99 | * |
| 100 | * @sd: Pointer to struct cam_subdev. |
| 101 | */ |
| 102 | int cam_register_subdev(struct cam_subdev *sd); |
| 103 | |
| 104 | /** |
| 105 | * cam_unregister_subdev() |
| 106 | * |
| 107 | * @brief: This is the common utility function to be called by each camera |
| 108 | * subdevice node when it tries to unregister itself from the |
| 109 | * camera request manger |
| 110 | * |
| 111 | * @sd: Pointer to struct cam_subdev. |
| 112 | */ |
| 113 | int cam_unregister_subdev(struct cam_subdev *sd); |
| 114 | |
| 115 | #endif /* _CAM_SUBDEV_H_ */ |