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- /* Driver for USB Mass Storage compliant devices
- * Protocol Functions Header File
- *
- * 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_
- /* Protocol handling routines */
- extern void usb_stor_pad12_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, struct scatterlist **,
- 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
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