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cdda479f LP |
1 | /* |
2 | * uvc_gadget.h -- USB Video Class Gadget driver | |
3 | * | |
4 | * Copyright (C) 2009-2010 | |
5 | * Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
cdda479f LP |
11 | */ |
12 | ||
13 | #ifndef _UVC_GADGET_H_ | |
14 | #define _UVC_GADGET_H_ | |
15 | ||
16 | #include <linux/ioctl.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/usb/ch9.h> | |
19 | ||
20 | #define UVC_EVENT_FIRST (V4L2_EVENT_PRIVATE_START + 0) | |
21 | #define UVC_EVENT_CONNECT (V4L2_EVENT_PRIVATE_START + 0) | |
22 | #define UVC_EVENT_DISCONNECT (V4L2_EVENT_PRIVATE_START + 1) | |
23 | #define UVC_EVENT_STREAMON (V4L2_EVENT_PRIVATE_START + 2) | |
24 | #define UVC_EVENT_STREAMOFF (V4L2_EVENT_PRIVATE_START + 3) | |
25 | #define UVC_EVENT_SETUP (V4L2_EVENT_PRIVATE_START + 4) | |
26 | #define UVC_EVENT_DATA (V4L2_EVENT_PRIVATE_START + 5) | |
27 | #define UVC_EVENT_LAST (V4L2_EVENT_PRIVATE_START + 5) | |
28 | ||
29 | struct uvc_request_data | |
30 | { | |
6f6543f5 | 31 | __s32 length; |
cdda479f LP |
32 | __u8 data[60]; |
33 | }; | |
34 | ||
35 | struct uvc_event | |
36 | { | |
37 | union { | |
38 | enum usb_device_speed speed; | |
39 | struct usb_ctrlrequest req; | |
40 | struct uvc_request_data data; | |
41 | }; | |
42 | }; | |
43 | ||
44 | #define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data) | |
45 | ||
46 | #define UVC_INTF_CONTROL 0 | |
47 | #define UVC_INTF_STREAMING 1 | |
48 | ||
cdda479f LP |
49 | /* ------------------------------------------------------------------------ |
50 | * Debugging, printing and logging | |
51 | */ | |
52 | ||
53 | #ifdef __KERNEL__ | |
54 | ||
55 | #include <linux/usb.h> /* For usb_endpoint_* */ | |
56 | #include <linux/usb/gadget.h> | |
57 | #include <linux/videodev2.h> | |
255f5e06 | 58 | #include <linux/version.h> |
cdda479f LP |
59 | #include <media/v4l2-fh.h> |
60 | ||
61 | #include "uvc_queue.h" | |
62 | ||
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) | |
73 | ||
74 | #define UVC_WARN_MINMAX 0 | |
75 | #define UVC_WARN_PROBE_DEF 1 | |
76 | ||
5d9955f8 | 77 | extern unsigned int uvc_gadget_trace_param; |
cdda479f LP |
78 | |
79 | #define uvc_trace(flag, msg...) \ | |
80 | do { \ | |
5d9955f8 | 81 | if (uvc_gadget_trace_param & flag) \ |
cdda479f LP |
82 | printk(KERN_DEBUG "uvcvideo: " msg); \ |
83 | } while (0) | |
84 | ||
85 | #define uvc_warn_once(dev, warn, msg...) \ | |
86 | do { \ | |
87 | if (!test_and_set_bit(warn, &dev->warnings)) \ | |
88 | printk(KERN_INFO "uvcvideo: " msg); \ | |
89 | } while (0) | |
90 | ||
91 | #define uvc_printk(level, msg...) \ | |
92 | printk(level "uvcvideo: " msg) | |
93 | ||
94 | /* ------------------------------------------------------------------------ | |
95 | * Driver specific constants | |
96 | */ | |
97 | ||
98 | #define DRIVER_VERSION "0.1.0" | |
99 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0) | |
100 | ||
101 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) | |
102 | ||
103 | #define UVC_NUM_REQUESTS 4 | |
104 | #define UVC_MAX_REQUEST_SIZE 64 | |
105 | #define UVC_MAX_EVENTS 4 | |
106 | ||
cdda479f LP |
107 | /* ------------------------------------------------------------------------ |
108 | * Structures | |
109 | */ | |
110 | ||
111 | struct uvc_video | |
112 | { | |
113 | struct usb_ep *ep; | |
114 | ||
115 | /* Frame parameters */ | |
116 | u8 bpp; | |
117 | u32 fcc; | |
118 | unsigned int width; | |
119 | unsigned int height; | |
120 | unsigned int imagesize; | |
121 | ||
122 | /* Requests */ | |
123 | unsigned int req_size; | |
124 | struct usb_request *req[UVC_NUM_REQUESTS]; | |
125 | __u8 *req_buffer[UVC_NUM_REQUESTS]; | |
126 | struct list_head req_free; | |
127 | spinlock_t req_lock; | |
128 | ||
129 | void (*encode) (struct usb_request *req, struct uvc_video *video, | |
130 | struct uvc_buffer *buf); | |
131 | ||
132 | /* Context data used by the completion handler */ | |
133 | __u32 payload_size; | |
134 | __u32 max_payload_size; | |
135 | ||
136 | struct uvc_video_queue queue; | |
137 | unsigned int fid; | |
138 | }; | |
139 | ||
140 | enum uvc_state | |
141 | { | |
142 | UVC_STATE_DISCONNECTED, | |
143 | UVC_STATE_CONNECTED, | |
144 | UVC_STATE_STREAMING, | |
145 | }; | |
146 | ||
147 | struct uvc_device | |
148 | { | |
149 | struct video_device *vdev; | |
150 | enum uvc_state state; | |
151 | struct usb_function func; | |
152 | struct uvc_video video; | |
153 | ||
154 | /* Descriptors */ | |
155 | struct { | |
fbcaba0e BS |
156 | const struct uvc_descriptor_header * const *fs_control; |
157 | const struct uvc_descriptor_header * const *ss_control; | |
cdda479f LP |
158 | const struct uvc_descriptor_header * const *fs_streaming; |
159 | const struct uvc_descriptor_header * const *hs_streaming; | |
fbcaba0e | 160 | const struct uvc_descriptor_header * const *ss_streaming; |
cdda479f LP |
161 | } desc; |
162 | ||
163 | unsigned int control_intf; | |
164 | struct usb_ep *control_ep; | |
165 | struct usb_request *control_req; | |
166 | void *control_buf; | |
167 | ||
168 | unsigned int streaming_intf; | |
169 | ||
170 | /* Events */ | |
171 | unsigned int event_length; | |
172 | unsigned int event_setup_out : 1; | |
173 | }; | |
174 | ||
175 | static inline struct uvc_device *to_uvc(struct usb_function *f) | |
176 | { | |
177 | return container_of(f, struct uvc_device, func); | |
178 | } | |
179 | ||
180 | struct uvc_file_handle | |
181 | { | |
182 | struct v4l2_fh vfh; | |
183 | struct uvc_video *device; | |
184 | }; | |
185 | ||
186 | #define to_uvc_file_handle(handle) \ | |
187 | container_of(handle, struct uvc_file_handle, vfh) | |
188 | ||
cdda479f LP |
189 | /* ------------------------------------------------------------------------ |
190 | * Functions | |
191 | */ | |
192 | ||
cdda479f LP |
193 | extern void uvc_endpoint_stream(struct uvc_device *dev); |
194 | ||
195 | extern void uvc_function_connect(struct uvc_device *uvc); | |
196 | extern void uvc_function_disconnect(struct uvc_device *uvc); | |
197 | ||
198 | #endif /* __KERNEL__ */ | |
199 | ||
200 | #endif /* _UVC_GADGET_H_ */ | |
201 |