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)
10 #define _UVC_GADGET_H_
12 #include <linux/list.h>
13 #include <linux/mutex.h>
14 #include <linux/spinlock.h>
15 #include <linux/usb/composite.h>
16 #include <linux/videodev2.h>
17 #include <linux/wait.h>
19 #include <media/v4l2-device.h>
20 #include <media/v4l2-dev.h>
21 #include <media/v4l2-fh.h>
23 #include "uvc_queue.h"
27 struct uvc_descriptor_header;
30 /* ------------------------------------------------------------------------
31 * Debugging, printing and logging
34 #define UVC_TRACE_PROBE (1 << 0)
35 #define UVC_TRACE_DESCR (1 << 1)
36 #define UVC_TRACE_CONTROL (1 << 2)
37 #define UVC_TRACE_FORMAT (1 << 3)
38 #define UVC_TRACE_CAPTURE (1 << 4)
39 #define UVC_TRACE_CALLS (1 << 5)
40 #define UVC_TRACE_IOCTL (1 << 6)
41 #define UVC_TRACE_FRAME (1 << 7)
42 #define UVC_TRACE_SUSPEND (1 << 8)
43 #define UVC_TRACE_STATUS (1 << 9)
45 #define UVC_WARN_MINMAX 0
46 #define UVC_WARN_PROBE_DEF 1
48 extern unsigned int uvc_gadget_trace_param;
50 #define uvc_trace(flag, msg...) \
52 if (uvc_gadget_trace_param & flag) \
53 printk(KERN_DEBUG "uvcvideo: " msg); \
56 #define uvcg_dbg(f, fmt, args...) \
57 dev_dbg(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args)
58 #define uvcg_info(f, fmt, args...) \
59 dev_info(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args)
60 #define uvcg_warn(f, fmt, args...) \
61 dev_warn(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args)
62 #define uvcg_err(f, fmt, args...) \
63 dev_err(&(f)->config->cdev->gadget->dev, "%s: " fmt, (f)->name, ##args)
65 /* ------------------------------------------------------------------------
66 * Driver specific constants
69 #define UVC_MAX_REQUEST_SIZE 64
70 #define UVC_MAX_EVENTS 4
72 #define UVCG_REQUEST_HEADER_LEN 12
74 /* ------------------------------------------------------------------------
78 struct usb_request *req;
80 struct uvc_video *video;
82 u8 header[UVCG_REQUEST_HEADER_LEN];
83 struct uvc_buffer *last_buf;
87 struct uvc_device *uvc;
90 struct work_struct pump;
91 struct workqueue_struct *async_wq;
93 /* Frame parameters */
98 unsigned int imagesize;
99 struct mutex mutex; /* protects frame parameters */
101 unsigned int uvc_num_requests;
104 unsigned int req_size;
105 struct uvc_request *ureq;
106 struct list_head req_free;
109 unsigned int req_int_count;
111 void (*encode) (struct usb_request *req, struct uvc_video *video,
112 struct uvc_buffer *buf);
114 /* Context data used by the completion handler */
116 __u32 max_payload_size;
118 struct uvc_video_queue queue;
123 UVC_STATE_DISCONNECTED,
129 struct video_device vdev;
130 struct v4l2_device v4l2_dev;
131 enum uvc_state state;
132 struct usb_function func;
133 struct uvc_video video;
135 wait_queue_head_t func_connected_queue;
137 struct uvcg_streaming_header *header;
141 const struct uvc_descriptor_header * const *fs_control;
142 const struct uvc_descriptor_header * const *ss_control;
143 const struct uvc_descriptor_header * const *fs_streaming;
144 const struct uvc_descriptor_header * const *hs_streaming;
145 const struct uvc_descriptor_header * const *ss_streaming;
146 struct list_head *extension_units;
149 unsigned int control_intf;
150 struct usb_ep *interrupt_ep;
151 struct usb_request *control_req;
153 bool enable_interrupt_ep;
155 unsigned int streaming_intf;
158 unsigned int event_length;
159 unsigned int event_setup_out : 1;
162 static inline struct uvc_device *to_uvc(struct usb_function *f)
164 return container_of(f, struct uvc_device, func);
167 struct uvc_file_handle {
169 struct uvc_video *device;
170 bool is_uvc_app_handle;
173 #define to_uvc_file_handle(handle) \
174 container_of(handle, struct uvc_file_handle, vfh)
176 /* ------------------------------------------------------------------------
180 extern void uvc_function_setup_continue(struct uvc_device *uvc);
181 extern void uvc_function_connect(struct uvc_device *uvc);
182 extern void uvc_function_disconnect(struct uvc_device *uvc);
184 #endif /* _UVC_GADGET_H_ */