59 lines
2.4 KiB
C
59 lines
2.4 KiB
C
|
/*
|
||
|
|
* 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
|