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