1 // SPDX-License-Identifier: GPL-2.0+
3 * uvc_gadget.h -- USB Video Class Gadget driver
5 * Copyright (C) 2009-2010
6 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #ifndef _UVC_GADGET_H_
15 #define _UVC_GADGET_H_
17 #include <linux/ioctl.h>
18 #include <linux/types.h>
19 #include <linux/usb/ch9.h>
21 #define UVC_EVENT_FIRST (V4L2_EVENT_PRIVATE_START + 0)
22 #define UVC_EVENT_CONNECT (V4L2_EVENT_PRIVATE_START + 0)
23 #define UVC_EVENT_DISCONNECT (V4L2_EVENT_PRIVATE_START + 1)
24 #define UVC_EVENT_STREAMON (V4L2_EVENT_PRIVATE_START + 2)
25 #define UVC_EVENT_STREAMOFF (V4L2_EVENT_PRIVATE_START + 3)
26 #define UVC_EVENT_SETUP (V4L2_EVENT_PRIVATE_START + 4)
27 #define UVC_EVENT_DATA (V4L2_EVENT_PRIVATE_START + 5)
28 #define UVC_EVENT_LAST (V4L2_EVENT_PRIVATE_START + 5)
30 struct uvc_request_data {
37 enum usb_device_speed speed;
38 struct usb_ctrlrequest req;
39 struct uvc_request_data data;
43 #define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data)
45 #define UVC_INTF_CONTROL 0
46 #define UVC_INTF_STREAMING 1
48 /* ------------------------------------------------------------------------
49 * Debugging, printing and logging
54 #include <linux/usb.h> /* For usb_endpoint_* */
55 #include <linux/usb/composite.h>
56 #include <linux/usb/gadget.h>
57 #include <linux/videodev2.h>
58 #include <media/v4l2-fh.h>
59 #include <media/v4l2-device.h>
61 #include "uvc_queue.h"
63 #define UVC_TRACE_PROBE (1 << 0)
64 #define UVC_TRACE_DESCR (1 << 1)
65 #define UVC_TRACE_CONTROL (1 << 2)
66 #define UVC_TRACE_FORMAT (1 << 3)
67 #define UVC_TRACE_CAPTURE (1 << 4)
68 #define UVC_TRACE_CALLS (1 << 5)
69 #define UVC_TRACE_IOCTL (1 << 6)
70 #define UVC_TRACE_FRAME (1 << 7)
71 #define UVC_TRACE_SUSPEND (1 << 8)
72 #define UVC_TRACE_STATUS (1 << 9)
74 #define UVC_WARN_MINMAX 0
75 #define UVC_WARN_PROBE_DEF 1
77 extern unsigned int uvc_gadget_trace_param;
79 #define uvc_trace(flag, msg...) \
81 if (uvc_gadget_trace_param & flag) \
82 printk(KERN_DEBUG "uvcvideo: " msg); \
85 #define uvc_warn_once(dev, warn, msg...) \
87 if (!test_and_set_bit(warn, &dev->warnings)) \
88 printk(KERN_INFO "uvcvideo: " msg); \
91 #define uvc_printk(level, msg...) \
92 printk(level "uvcvideo: " msg)
94 /* ------------------------------------------------------------------------
95 * Driver specific constants
98 #define UVC_NUM_REQUESTS 4
99 #define UVC_MAX_REQUEST_SIZE 64
100 #define UVC_MAX_EVENTS 4
102 /* ------------------------------------------------------------------------
109 /* Frame parameters */
114 unsigned int imagesize;
115 struct mutex mutex; /* protects frame parameters */
118 unsigned int req_size;
119 struct usb_request *req[UVC_NUM_REQUESTS];
120 __u8 *req_buffer[UVC_NUM_REQUESTS];
121 struct list_head req_free;
124 void (*encode) (struct usb_request *req, struct uvc_video *video,
125 struct uvc_buffer *buf);
127 /* Context data used by the completion handler */
129 __u32 max_payload_size;
131 struct uvc_video_queue queue;
136 UVC_STATE_DISCONNECTED,
142 struct video_device vdev;
143 struct v4l2_device v4l2_dev;
144 enum uvc_state state;
145 struct usb_function func;
146 struct uvc_video video;
150 const struct uvc_descriptor_header * const *fs_control;
151 const struct uvc_descriptor_header * const *ss_control;
152 const struct uvc_descriptor_header * const *fs_streaming;
153 const struct uvc_descriptor_header * const *hs_streaming;
154 const struct uvc_descriptor_header * const *ss_streaming;
157 unsigned int control_intf;
158 struct usb_ep *control_ep;
159 struct usb_request *control_req;
162 unsigned int streaming_intf;
165 unsigned int event_length;
166 unsigned int event_setup_out : 1;
169 static inline struct uvc_device *to_uvc(struct usb_function *f)
171 return container_of(f, struct uvc_device, func);
174 struct uvc_file_handle {
176 struct uvc_video *device;
179 #define to_uvc_file_handle(handle) \
180 container_of(handle, struct uvc_file_handle, vfh)
182 /* ------------------------------------------------------------------------
186 extern void uvc_function_setup_continue(struct uvc_device *uvc);
187 extern void uvc_endpoint_stream(struct uvc_device *dev);
189 extern void uvc_function_connect(struct uvc_device *uvc);
190 extern void uvc_function_disconnect(struct uvc_device *uvc);
192 #endif /* __KERNEL__ */
194 #endif /* _UVC_GADGET_H_ */