LXR linux/drivers/usb/storage/debug.h

   1/*
   2 * Driver for USB Mass Storage compliant devices
   3 * Debugging Functions Header File
   4 *
   5 * Current development and maintenance by:
   6 *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
   7 *
   8 * Initial work by:
   9 *   (c) 1999 Michael Gee (michael@linuxspecific.com)
  10 *
  11 * This driver is based on the 'USB Mass Storage Class' document. This
  12 * describes in detail the protocol used to communicate with such
  13 * devices.  Clearly, the designers had SCSI and ATAPI commands in
  14 * mind when they created this document.  The commands are all very
  15 * similar to commands in the SCSI-II and ATAPI specifications.
  16 *
  17 * It is important to note that in a number of cases this class
  18 * exhibits class-specific exemptions from the USB specification.
  19 * Notably the usage of NAK, STALL and ACK differs from the norm, in
  20 * that they are used to communicate wait, failed and OK on commands.
  21 *
  22 * Also, for certain devices, the interrupt endpoint is used to convey
  23 * status of a command.
  24 *
  25 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
  26 * information about this driver.
  27 *
  28 * This program is free software; you can redistribute it and/or modify it
  29 * under the terms of the GNU General Public License as published by the
  30 * Free Software Foundation; either version 2, or (at your option) any
  31 * later version.
  32 *
  33 * This program is distributed in the hope that it will be useful, but
  34 * WITHOUT ANY WARRANTY; without even the implied warranty of
  35 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  36 * General Public License for more details.
  37 *
  38 * You should have received a copy of the GNU General Public License along
  39 * with this program; if not, write to the Free Software Foundation, Inc.,
  40 * 675 Mass Ave, Cambridge, MA 02139, USA.
  41 */
  42
  43#ifndef _DEBUG_H_
  44#define _DEBUG_H_
  45
  46#include <linux/kernel.h>
  47
  48#define USB_STORAGE "usb-storage: "
  49
  50#ifdef CONFIG_USB_STORAGE_DEBUG
  51void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb);
  52void usb_stor_show_sense(const struct us_data *us, unsigned char key,
  53                         unsigned char asc, unsigned char ascq);
  54__printf(2, 3) void usb_stor_dbg(const struct us_data *us,
  55                                 const char *fmt, ...);
  56
  57#define US_DEBUG(x)             x
  58#else
  59__printf(2, 3)
  60static inline void _usb_stor_dbg(const struct us_data *us,
  61                                 const char *fmt, ...)
  62{
  63}
  64#define usb_stor_dbg(us, fmt, ...)                              \
  65        do { if (0) _usb_stor_dbg(us, fmt, ##__VA_ARGS__); } while (0)
  66#define US_DEBUG(x)
  67#endif
  68
  69#endif
  70