1/* SPDX-License-Identifier: GPL-2.0+ */
 2/*
 3 * Driver for USB Mass Storage compliant devices
 4 * Protocol Functions Header File
 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
24#ifndef _PROTOCOL_H_
25#define _PROTOCOL_H_
26
27/* Protocol handling routines */
28extern void usb_stor_pad12_command(struct scsi_cmnd*, struct us_data*);
29extern void usb_stor_ufi_command(struct scsi_cmnd*, struct us_data*);
30extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*,
31		struct us_data*);
32
33/* struct scsi_cmnd transfer buffer access utilities */
34enum xfer_buf_dir	{TO_XFER_BUF, FROM_XFER_BUF};
35
36extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
37	unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **,
38	unsigned int *offset, enum xfer_buf_dir dir);
39
40extern void usb_stor_set_xfer_buf(unsigned char *buffer,
41	unsigned int buflen, struct scsi_cmnd *srb);
42#endif

 1/* Driver for USB Mass Storage compliant devices
 
 
 2 * Protocol Functions Header File
 3 *
 4 * Current development and maintenance by:
 5 *   (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
 6 *
 7 * This driver is based on the 'USB Mass Storage Class' document. This
 8 * describes in detail the protocol used to communicate with such
 9 * devices.  Clearly, the designers had SCSI and ATAPI commands in
10 * mind when they created this document.  The commands are all very
11 * similar to commands in the SCSI-II and ATAPI specifications.
12 *
13 * It is important to note that in a number of cases this class
14 * exhibits class-specific exemptions from the USB specification.
15 * Notably the usage of NAK, STALL and ACK differs from the norm, in
16 * that they are used to communicate wait, failed and OK on commands.
17 *
18 * Also, for certain devices, the interrupt endpoint is used to convey
19 * status of a command.
20 *
21 * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
22 * information about this driver.
23 *
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the
26 * Free Software Foundation; either version 2, or (at your option) any
27 * later version.
28 *
29 * This program is distributed in the hope that it will be useful, but
30 * WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
32 * General Public License for more details.
33 *
34 * You should have received a copy of the GNU General Public License along
35 * with this program; if not, write to the Free Software Foundation, Inc.,
36 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 */
38
39#ifndef _PROTOCOL_H_
40#define _PROTOCOL_H_
41
42/* Protocol handling routines */
43extern void usb_stor_pad12_command(struct scsi_cmnd*, struct us_data*);
44extern void usb_stor_ufi_command(struct scsi_cmnd*, struct us_data*);
45extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*,
46		struct us_data*);
47
48/* struct scsi_cmnd transfer buffer access utilities */
49enum xfer_buf_dir	{TO_XFER_BUF, FROM_XFER_BUF};
50
51extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
52	unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **,
53	unsigned int *offset, enum xfer_buf_dir dir);
54
55extern void usb_stor_set_xfer_buf(unsigned char *buffer,
56	unsigned int buflen, struct scsi_cmnd *srb);
57#endif