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1 // SPDX-License-Identifier: GPL-2.0+
3 * Driver for USB Mass Storage compliant devices
4 * Debugging Functions Header File
6 * Current development and maintenance by:
7 * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
10 * (c) 1999 Michael Gee (michael@linuxspecific.com)
12 * This driver is based on the 'USB Mass Storage Class' document. This
13 * describes in detail the protocol used to communicate with such
14 * devices. Clearly, the designers had SCSI and ATAPI commands in
15 * mind when they created this document. The commands are all very
16 * similar to commands in the SCSI-II and ATAPI specifications.
18 * It is important to note that in a number of cases this class
19 * exhibits class-specific exemptions from the USB specification.
20 * Notably the usage of NAK, STALL and ACK differs from the norm, in
21 * that they are used to communicate wait, failed and OK on commands.
23 * Also, for certain devices, the interrupt endpoint is used to convey
24 * status of a command.
26 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
27 * information about this driver.
33 #include <linux/kernel.h>
35 #define USB_STORAGE "usb-storage: "
37 #ifdef CONFIG_USB_STORAGE_DEBUG
38 void usb_stor_show_command(const struct us_data
*us
, struct scsi_cmnd
*srb
);
39 void usb_stor_show_sense(const struct us_data
*us
, unsigned char key
,
40 unsigned char asc
, unsigned char ascq
);
41 __printf(2, 3) void usb_stor_dbg(const struct us_data
*us
,
42 const char *fmt
, ...);
47 static inline void _usb_stor_dbg(const struct us_data
*us
,
51 #define usb_stor_dbg(us, fmt, ...) \
52 do { if (0) _usb_stor_dbg(us, fmt, ##__VA_ARGS__); } while (0)