ARC: [plat-eznps] spinlock aware for MTM
[linux/fpc-iii.git] / drivers / usb / storage / debug.h
blob8ab73299b6502b057fa6bd6c97c8328131f5ad05
1 /*
2 * Driver for USB Mass Storage compliant devices
3 * Debugging Functions Header File
5 * Current development and maintenance by:
6 * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
8 * Initial work by:
9 * (c) 1999 Michael Gee (michael@linuxspecific.com)
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.
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.
22 * Also, for certain devices, the interrupt endpoint is used to convey
23 * status of a command.
25 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
26 * information about this driver.
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.
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.
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.
43 #ifndef _DEBUG_H_
44 #define _DEBUG_H_
46 #include <linux/kernel.h>
48 #define USB_STORAGE "usb-storage: "
50 #ifdef CONFIG_USB_STORAGE_DEBUG
51 void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb);
52 void 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, ...);
57 #define US_DEBUG(x) x
58 #else
59 __printf(2, 3)
60 static inline void _usb_stor_dbg(const struct us_data *us,
61 const char *fmt, ...)
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
69 #endif