drivers/media/usb/tm6000/tm6000-usb-isoc.h

   1 /*
   2  *  tm6000-buf.c - driver for TM5600/TM6000/TM6010 USB video capture devices
   3  *
   4  *  Copyright (C) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation version 2
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  */
  15
  16 #include <linux/videodev2.h>
  17
  18 #define TM6000_URB_MSG_LEN 180
  19
  20 struct usb_isoc_ctl {
  21                 /* max packet size of isoc transaction */
  22         int                             max_pkt_size;
  23
  24                 /* number of allocated urbs */
  25         int                             num_bufs;
  26
  27                 /* urb for isoc transfers */
  28         struct urb                      **urb;
  29
  30                 /* transfer buffers for isoc transfer */
  31         char                            **transfer_buffer;
  32
  33                 /* Last buffer command and region */
  34         u8                              cmd;
  35         int                             pos, size, pktsize;
  36
  37                 /* Last field: ODD or EVEN? */
  38         int                             vfield, field;
  39
  40                 /* Stores incomplete commands */
  41         u32                             tmp_buf;
  42         int                             tmp_buf_len;
  43
  44                 /* Stores already requested buffers */
  45         struct tm6000_buffer            *buf;
  46 };