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 29struct uvc_request_data 30{ 31 unsigned int length; 32 __u8 data[60]; 33}; 34 35struct 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 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> 58#include <linux/version.h> 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 77extern unsigned int uvc_gadget_trace_param; 78 79#define uvc_trace(flag, msg...) \ 80 do { \ 81 if (uvc_gadget_trace_param & flag) \ 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 4 106 107/* ------------------------------------------------------------------------ 108 * Structures 109 */ 110 111struct 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 140enum uvc_state 141{ 142 UVC_STATE_DISCONNECTED, 143 UVC_STATE_CONNECTED, 144 UVC_STATE_STREAMING, 145}; 146 147struct 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 { 156 const struct uvc_descriptor_header * const *control; 157 const struct uvc_descriptor_header * const *fs_streaming; 158 const struct uvc_descriptor_header * const *hs_streaming; 159 } desc; 160 161 unsigned int control_intf; 162 struct usb_ep *control_ep; 163 struct usb_request *control_req; 164 void *control_buf; 165 166 unsigned int streaming_intf; 167 168 /* Events */ 169 unsigned int event_length; 170 unsigned int event_setup_out : 1; 171}; 172 173static inline struct uvc_device *to_uvc(struct usb_function *f) 174{ 175 return container_of(f, struct uvc_device, func); 176} 177 178struct uvc_file_handle 179{ 180 struct v4l2_fh vfh; 181 struct uvc_video *device; 182}; 183 184#define to_uvc_file_handle(handle) \ 185 container_of(handle, struct uvc_file_handle, vfh) 186 187/* ------------------------------------------------------------------------ 188 * Functions 189 */ 190 191extern void uvc_endpoint_stream(struct uvc_device *dev); 192 193extern void uvc_function_connect(struct uvc_device *uvc); 194extern void uvc_function_disconnect(struct uvc_device *uvc); 195 196#endif /* __KERNEL__ */ 197 198#endif /* _UVC_GADGET_H_ */ 199 200