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

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0
   3  * tm6000-buf.c - driver for TM5600/TM6000/TM6010 USB video capture devices
   4  *
   5  * Copyright (c) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
   6  */
   7
   8 #include <linux/videodev2.h>
   9
  10 #define TM6000_URB_MSG_LEN 180
  11
  12 struct usb_isoc_ctl {
  13                 /* max packet size of isoc transaction */
  14         int                             max_pkt_size;
  15
  16                 /* number of allocated urbs */
  17         int                             num_bufs;
  18
  19                 /* urb for isoc transfers */
  20         struct urb                      **urb;
  21
  22                 /* transfer buffers for isoc transfer */
  23         char                            **transfer_buffer;
  24
  25                 /* Last buffer command and region */
  26         u8                              cmd;
  27         int                             pos, size, pktsize;
  28
  29                 /* Last field: ODD or EVEN? */
  30         int                             vfield, field;
  31
  32                 /* Stores incomplete commands */
  33         u32                             tmp_buf;
  34         int                             tmp_buf_len;
  35
  36                 /* Stores already requested buffers */
  37         struct tm6000_buffer            *buf;
  38 };