projects / linux-block.git / blame
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|---|---|---|
| 5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
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2 | /* |
| 3 | * u_uvc.h | |
| 4 | * | |
| 5 | * Utility definitions for the uvc function | |
| 6 | * | |
| 7 | * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd. | |
| 8 | * http://www.samsung.com | |
| 9 | * | |
| 10 | * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com> | |
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11 | */ |
| 12 | ||
| 13 | #ifndef U_UVC_H | |
| 14 | #define U_UVC_H | |
| 15 | ||
| 284eb166 | 16 | #include <linux/mutex.h> |
| 6d11ed76 | 17 | #include <linux/usb/composite.h> |
| 46919a23 | 18 | #include <linux/usb/video.h> |
| 6d11ed76 | 19 | |
| bbea6de1 | 20 | #define fi_to_f_uvc_opts(f) container_of(f, struct f_uvc_opts, func_inst) |
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21 | |
| 22 | struct f_uvc_opts { | |
| 23 | struct usb_function_instance func_inst; | |
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24 | unsigned int streaming_interval; |
| 25 | unsigned int streaming_maxpacket; | |
| 26 | unsigned int streaming_maxburst; | |
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27 | |
| 28 | /* | |
| 29 | * Control descriptors array pointers for full-/high-speed and | |
| 30 | * super-speed. They point by default to the uvc_fs_control_cls and | |
| 31 | * uvc_ss_control_cls arrays respectively. Legacy gadgets must | |
| 32 | * override them in their gadget bind callback. | |
| 33 | */ | |
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34 | const struct uvc_descriptor_header * const *fs_control; |
| 35 | const struct uvc_descriptor_header * const *ss_control; | |
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36 | |
| 37 | /* | |
| 38 | * Streaming descriptors array pointers for full-speed, high-speed and | |
| 39 | * super-speed. They will point to the uvc_[fhs]s_streaming_cls arrays | |
| 40 | * for configfs-based gadgets. Legacy gadgets must initialize them in | |
| 41 | * their gadget bind callback. | |
| 42 | */ | |
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43 | const struct uvc_descriptor_header * const *fs_streaming; |
| 44 | const struct uvc_descriptor_header * const *hs_streaming; | |
| 45 | const struct uvc_descriptor_header * const *ss_streaming; | |
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46 | |
| 47 | /* Default control descriptors for configfs-based gadgets. */ | |
| 48 | struct uvc_camera_terminal_descriptor uvc_camera_terminal; | |
| 49 | struct uvc_processing_unit_descriptor uvc_processing; | |
| 50 | struct uvc_output_terminal_descriptor uvc_output_terminal; | |
| 51 | struct uvc_color_matching_descriptor uvc_color_matching; | |
| 52 | ||
| 53 | /* | |
| 54 | * Control descriptors pointers arrays for full-/high-speed and | |
| 55 | * super-speed. The first element is a configurable control header | |
| 56 | * descriptor, the other elements point to the fixed default control | |
| 57 | * descriptors. Used by configfs only, must not be touched by legacy | |
| 58 | * gadgets. | |
| 59 | */ | |
| 60 | struct uvc_descriptor_header *uvc_fs_control_cls[5]; | |
| 61 | struct uvc_descriptor_header *uvc_ss_control_cls[5]; | |
| 62 | ||
| 63 | /* | |
| 64 | * Streaming descriptors for full-speed, high-speed and super-speed. | |
| 65 | * Used by configfs only, must not be touched by legacy gadgets. The | |
| 66 | * arrays are allocated at runtime as the number of descriptors isn't | |
| 67 | * known in advance. | |
| 68 | */ | |
| 69 | struct uvc_descriptor_header **uvc_fs_streaming_cls; | |
| 70 | struct uvc_descriptor_header **uvc_hs_streaming_cls; | |
| 71 | struct uvc_descriptor_header **uvc_ss_streaming_cls; | |
| 72 | ||
| 73 | /* | |
| 74 | * Read/write access to configfs attributes is handled by configfs. | |
| 75 | * | |
| 76 | * This lock protects the descriptors from concurrent access by | |
| 77 | * read/write and symlink creation/removal. | |
| 78 | */ | |
| 79 | struct mutex lock; | |
| 80 | int refcnt; | |
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81 | }; |
| 82 | ||
| 6d11ed76 | 83 | #endif /* U_UVC_H */ |