1 /* Driver for USB Mass Storage compliant devices 2 * Protocol Functions Header File 3 * 4 * $Id: protocol.h,v 1.4 2001/02/13 07:10:03 mdharm Exp $ 5 * 6 * Current development and maintenance by: 7 * (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net) 8 * 9 * This driver is based on the 'USB Mass Storage Class' document. This 10 * describes in detail the protocol used to communicate with such 11 * devices. Clearly, the designers had SCSI and ATAPI commands in 12 * mind when they created this document. The commands are all very 13 * similar to commands in the SCSI-II and ATAPI specifications. 14 * 15 * It is important to note that in a number of cases this class 16 * exhibits class-specific exemptions from the USB specification. 17 * Notably the usage of NAK, STALL and ACK differs from the norm, in 18 * that they are used to communicate wait, failed and OK on commands. 19 * 20 * Also, for certain devices, the interrupt endpoint is used to convey 21 * status of a command. 22 * 23 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more 24 * information about this driver. 25 * 26 * This program is free software; you can redistribute it and/or modify it 27 * under the terms of the GNU General Public License as published by the 28 * Free Software Foundation; either version 2, or (at your option) any 29 * later version. 30 * 31 * This program is distributed in the hope that it will be useful, but 32 * WITHOUT ANY WARRANTY; without even the implied warranty of 33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 34 * General Public License for more details. 35 * 36 * You should have received a copy of the GNU General Public License along 37 * with this program; if not, write to the Free Software Foundation, Inc., 38 * 675 Mass Ave, Cambridge, MA 02139, USA. 39 */ 40 41 #ifndef _PROTOCOL_H_ 42 #define _PROTOCOL_H_ 43 44 #include <linux/blk.h> 45 #include "scsi.h" 46 #include "usb.h" 47 48 /* Sub Classes */ 49 50 #define US_SC_RBC 0x01 /* Typically, flash devices */ 51 #define US_SC_8020 0x02 /* CD-ROM */ 52 #define US_SC_QIC 0x03 /* QIC-157 Tapes */ 53 #define US_SC_UFI 0x04 /* Floppy */ 54 #define US_SC_8070 0x05 /* Removable media */ 55 #define US_SC_SCSI 0x06 /* Transparent */ 56 #define US_SC_ISD200 0x07 /* ISD200 ATA */ 57 #define US_SC_MIN US_SC_RBC 58 #define US_SC_MAX US_SC_ISD200 59 60 #define US_SC_DEVICE 0xff /* Use device's value */ 61 62 extern void usb_stor_ATAPI_command(Scsi_Cmnd*, struct us_data*); 63 extern void usb_stor_qic157_command(Scsi_Cmnd*, struct us_data*); 64 extern void usb_stor_ufi_command(Scsi_Cmnd*, struct us_data*); 65 extern void usb_stor_transparent_scsi_command(Scsi_Cmnd*, struct us_data*); 66 67 #endif 68