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 50 void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb); 51 void 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_DEBUGPX(fmt, ...) printk(fmt, ##__VA_ARGS__) 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, ...) 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_DEBUGPX(fmt, ...) \ 67 do { if (0) printk(fmt, ##__VA_ARGS__); } while (0) 68 #define US_DEBUG(x) 69 #endif 70 71 #endif 72