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

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