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  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/videodev2.h>
  21
  22 #define TM6000_URB_MSG_LEN 180
  23
  24 struct usb_isoc_ctl {
  25                 /* max packet size of isoc transaction */
  26         int                             max_pkt_size;
  27
  28                 /* number of allocated urbs */
  29         int                             num_bufs;
  30
  31                 /* urb for isoc transfers */
  32         struct urb                      **urb;
  33
  34                 /* transfer buffers for isoc transfer */
  35         char                            **transfer_buffer;
  36
  37                 /* Last buffer command and region */
  38         u8                              cmd;
  39         int                             pos, size, pktsize;
  40
  41                 /* Last field: ODD or EVEN? */
  42         int                             vfield, field;
  43
  44                 /* Stores incomplete commands */
  45         u32                             tmp_buf;
  46         int                             tmp_buf_len;
  47
  48                 /* Stores already requested buffers */
  49         struct tm6000_buffer            *buf;
  50 };