| /* Driver for USB Mass Storage compliant devices |
| * Protocol Functions Header File |
| * |
| * $Id: protocol.h,v 1.4 2001/02/13 07:10:03 mdharm Exp $ |
| * |
| * Current development and maintenance by: |
| * (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net) |
| * |
| * This driver is based on the 'USB Mass Storage Class' document. This |
| * describes in detail the protocol used to communicate with such |
| * devices. Clearly, the designers had SCSI and ATAPI commands in |
| * mind when they created this document. The commands are all very |
| * similar to commands in the SCSI-II and ATAPI specifications. |
| * |
| * It is important to note that in a number of cases this class |
| * exhibits class-specific exemptions from the USB specification. |
| * Notably the usage of NAK, STALL and ACK differs from the norm, in |
| * that they are used to communicate wait, failed and OK on commands. |
| * |
| * Also, for certain devices, the interrupt endpoint is used to convey |
| * status of a command. |
| * |
| * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more |
| * information about this driver. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2, or (at your option) any |
| * later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #ifndef _PROTOCOL_H_ |
| #define _PROTOCOL_H_ |
| |
| /* Sub Classes */ |
| |
| #define US_SC_RBC 0x01 /* Typically, flash devices */ |
| #define US_SC_8020 0x02 /* CD-ROM */ |
| #define US_SC_QIC 0x03 /* QIC-157 Tapes */ |
| #define US_SC_UFI 0x04 /* Floppy */ |
| #define US_SC_8070 0x05 /* Removable media */ |
| #define US_SC_SCSI 0x06 /* Transparent */ |
| #define US_SC_ISD200 0x07 /* ISD200 ATA */ |
| #define US_SC_MIN US_SC_RBC |
| #define US_SC_MAX US_SC_ISD200 |
| |
| #define US_SC_DEVICE 0xff /* Use device's value */ |
| |
| /* Protocol handling routines */ |
| extern void usb_stor_ATAPI_command(struct scsi_cmnd*, struct us_data*); |
| extern void usb_stor_qic157_command(struct scsi_cmnd*, struct us_data*); |
| extern void usb_stor_ufi_command(struct scsi_cmnd*, struct us_data*); |
| extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*, |
| struct us_data*); |
| |
| /* struct scsi_cmnd transfer buffer access utilities */ |
| enum xfer_buf_dir {TO_XFER_BUF, FROM_XFER_BUF}; |
| |
| extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, |
| unsigned int buflen, struct scsi_cmnd *srb, unsigned int *index, |
| unsigned int *offset, enum xfer_buf_dir dir); |
| |
| extern void usb_stor_set_xfer_buf(unsigned char *buffer, |
| unsigned int buflen, struct scsi_cmnd *srb); |
| #endif |
