1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Driver for USB Mass Storage compliant devices
4  * Debugging Functions Header File
5  *
6  * Current development and maintenance by:
7  *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
8  *
9  * Initial work by:
10  *   (c) 1999 Michael Gee (michael@linuxspecific.com)
11  *
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.
17  *
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.
22  *
23  * Also, for certain devices, the interrupt endpoint is used to convey
24  * status of a command.
25  */
26 
27 #ifndef _DEBUG_H_
28 #define _DEBUG_H_
29 
30 #include <linux/kernel.h>
31 
32 #ifdef CONFIG_USB_STORAGE_DEBUG
33 void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb);
34 void usb_stor_show_sense(const struct us_data *us, unsigned char key,
35 			 unsigned char asc, unsigned char ascq);
36 __printf(2, 3) void usb_stor_dbg(const struct us_data *us,
37 				 const char *fmt, ...);
38 
39 #define US_DEBUG(x)		x
40 #else
41 __printf(2, 3)
_usb_stor_dbg(const struct us_data * us,const char * fmt,...)42 static inline void _usb_stor_dbg(const struct us_data *us,
43 				 const char *fmt, ...)
44 {
45 }
46 #define usb_stor_dbg(us, fmt, ...)				\
47 	do { if (0) _usb_stor_dbg(us, fmt, ##__VA_ARGS__); } while (0)
48 #define US_DEBUG(x)
49 #endif
50 
51 #endif
52