1 /* Driver for USB Mass Storage compliant devices 2 * Debugging Functions Header File 3 * 4 * $Id: debug.h,v 1.6 2001/01/12 23:51:04 mdharm Exp $ 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 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more 27 * information about this driver. 28 * 29 * This program is free software; you can redistribute it and/or modify it 30 * under the terms of the GNU General Public License as published by the 31 * Free Software Foundation; either version 2, or (at your option) any 32 * later version. 33 * 34 * This program is distributed in the hope that it will be useful, but 35 * WITHOUT ANY WARRANTY; without even the implied warranty of 36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 37 * General Public License for more details. 38 * 39 * You should have received a copy of the GNU General Public License along 40 * with this program; if not, write to the Free Software Foundation, Inc., 41 * 675 Mass Ave, Cambridge, MA 02139, USA. 42 */ 43 44 #ifndef _DEBUG_H_ 45 #define _DEBUG_H_ 46 47 #include <linux/kernel.h> 48 49 #define USB_STORAGE "usb-storage: " 50 51 #ifdef CONFIG_USB_STORAGE_DEBUG 52 void usb_stor_show_command(struct scsi_cmnd *srb); 53 void usb_stor_show_sense( unsigned char key, 54 unsigned char asc, unsigned char ascq ); 55 #define US_DEBUGP(x...) printk( KERN_DEBUG USB_STORAGE x ) 56 #define US_DEBUGPX(x...) printk( x ) 57 #define US_DEBUG(x) x 58 #else 59 #define US_DEBUGP(x...) 60 #define US_DEBUGPX(x...) 61 #define US_DEBUG(x) 62 #endif 63 64 #endif 65