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. 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 __s32 length; 31 __u8 data[60]; 32 }; 33 34 struct uvc_event { 35 union { 36 enum usb_device_speed speed; 37 struct usb_ctrlrequest req; 38 struct uvc_request_data data; 39 }; 40 }; 41 42 #define UVCIOC_SEND_RESPONSE _IOW('U', 1, struct uvc_request_data) 43 44 #define UVC_INTF_CONTROL 0 45 #define UVC_INTF_STREAMING 1 46 47 /* ------------------------------------------------------------------------ 48 * Debugging, printing and logging 49 */ 50 51 #ifdef __KERNEL__ 52 53 #include <linux/usb.h> /* For usb_endpoint_* */ 54 #include <linux/usb/composite.h> 55 #include <linux/usb/gadget.h> 56 #include <linux/videodev2.h> 57 #include <media/v4l2-fh.h> 58 #include <media/v4l2-device.h> 59 60 #include "uvc_queue.h" 61 62 #define UVC_TRACE_PROBE (1 << 0) 63 #define UVC_TRACE_DESCR (1 << 1) 64 #define UVC_TRACE_CONTROL (1 << 2) 65 #define UVC_TRACE_FORMAT (1 << 3) 66 #define UVC_TRACE_CAPTURE (1 << 4) 67 #define UVC_TRACE_CALLS (1 << 5) 68 #define UVC_TRACE_IOCTL (1 << 6) 69 #define UVC_TRACE_FRAME (1 << 7) 70 #define UVC_TRACE_SUSPEND (1 << 8) 71 #define UVC_TRACE_STATUS (1 << 9) 72 73 #define UVC_WARN_MINMAX 0 74 #define UVC_WARN_PROBE_DEF 1 75 76 extern unsigned int uvc_gadget_trace_param; 77 78 #define uvc_trace(flag, msg...) \ 79 do { \ 80 if (uvc_gadget_trace_param & flag) \ 81 printk(KERN_DEBUG "uvcvideo: " msg); \ 82 } while (0) 83 84 #define uvc_warn_once(dev, warn, msg...) \ 85 do { \ 86 if (!test_and_set_bit(warn, &dev->warnings)) \ 87 printk(KERN_INFO "uvcvideo: " msg); \ 88 } while (0) 89 90 #define uvc_printk(level, msg...) \ 91 printk(level "uvcvideo: " msg) 92 93 /* ------------------------------------------------------------------------ 94 * Driver specific constants 95 */ 96 97 #define UVC_NUM_REQUESTS 4 98 #define UVC_MAX_REQUEST_SIZE 64 99 #define UVC_MAX_EVENTS 4 100 101 /* ------------------------------------------------------------------------ 102 * Structures 103 */ 104 105 struct uvc_video { 106 struct usb_ep *ep; 107 108 /* Frame parameters */ 109 u8 bpp; 110 u32 fcc; 111 unsigned int width; 112 unsigned int height; 113 unsigned int imagesize; 114 struct mutex mutex; /* protects frame parameters */ 115 116 /* Requests */ 117 unsigned int req_size; 118 struct usb_request *req[UVC_NUM_REQUESTS]; 119 __u8 *req_buffer[UVC_NUM_REQUESTS]; 120 struct list_head req_free; 121 spinlock_t req_lock; 122 123 void (*encode) (struct usb_request *req, struct uvc_video *video, 124 struct uvc_buffer *buf); 125 126 /* Context data used by the completion handler */ 127 __u32 payload_size; 128 __u32 max_payload_size; 129 130 struct uvc_video_queue queue; 131 unsigned int fid; 132 }; 133 134 enum uvc_state { 135 UVC_STATE_DISCONNECTED, 136 UVC_STATE_CONNECTED, 137 UVC_STATE_STREAMING, 138 }; 139 140 struct uvc_device { 141 struct video_device vdev; 142 struct v4l2_device v4l2_dev; 143 enum uvc_state state; 144 struct usb_function func; 145 struct uvc_video video; 146 147 /* Descriptors */ 148 struct { 149 const struct uvc_descriptor_header * const *fs_control; 150 const struct uvc_descriptor_header * const *ss_control; 151 const struct uvc_descriptor_header * const *fs_streaming; 152 const struct uvc_descriptor_header * const *hs_streaming; 153 const struct uvc_descriptor_header * const *ss_streaming; 154 } desc; 155 156 unsigned int control_intf; 157 struct usb_ep *control_ep; 158 struct usb_request *control_req; 159 void *control_buf; 160 161 unsigned int streaming_intf; 162 163 /* Events */ 164 unsigned int event_length; 165 unsigned int event_setup_out : 1; 166 }; 167 168 static inline struct uvc_device *to_uvc(struct usb_function *f) 169 { 170 return container_of(f, struct uvc_device, func); 171 } 172 173 struct uvc_file_handle { 174 struct v4l2_fh vfh; 175 struct uvc_video *device; 176 }; 177 178 #define to_uvc_file_handle(handle) \ 179 container_of(handle, struct uvc_file_handle, vfh) 180 181 /* ------------------------------------------------------------------------ 182 * Functions 183 */ 184 185 extern void uvc_function_setup_continue(struct uvc_device *uvc); 186 extern void uvc_endpoint_stream(struct uvc_device *dev); 187 188 extern void uvc_function_connect(struct uvc_device *uvc); 189 extern void uvc_function_disconnect(struct uvc_device *uvc); 190 191 #endif /* __KERNEL__ */ 192 193 #endif /* _UVC_GADGET_H_ */ 194 195