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1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Driver for USB Mass Storage compliant devices
4 * Transport 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 _TRANSPORT_H_
25#define _TRANSPORT_H_
26
27#include <linux/blkdev.h>
28
29/*
30 * usb_stor_bulk_transfer_xxx() return codes, in order of severity
31 */
32
33#define USB_STOR_XFER_GOOD 0 /* good transfer */
34#define USB_STOR_XFER_SHORT 1 /* transferred less than expected */
35#define USB_STOR_XFER_STALLED 2 /* endpoint stalled */
36#define USB_STOR_XFER_LONG 3 /* device tried to send too much */
37#define USB_STOR_XFER_ERROR 4 /* transfer died in the middle */
38
39/*
40 * Transport return codes
41 */
42
43#define USB_STOR_TRANSPORT_GOOD 0 /* Transport good, command good */
44#define USB_STOR_TRANSPORT_FAILED 1 /* Transport good, command failed */
45#define USB_STOR_TRANSPORT_NO_SENSE 2 /* Command failed, no auto-sense */
46#define USB_STOR_TRANSPORT_ERROR 3 /* Transport bad (i.e. device dead) */
47
48/*
49 * We used to have USB_STOR_XFER_ABORTED and USB_STOR_TRANSPORT_ABORTED
50 * return codes. But now the transport and low-level transfer routines
51 * treat an abort as just another error (-ENOENT for a cancelled URB).
52 * It is up to the invoke_transport() function to test for aborts and
53 * distinguish them from genuine communication errors.
54 */
55
56/*
57 * CBI accept device specific command
58 */
59
60#define US_CBI_ADSC 0
61
62extern int usb_stor_CB_transport(struct scsi_cmnd *, struct us_data*);
63extern int usb_stor_CB_reset(struct us_data*);
64
65extern int usb_stor_Bulk_transport(struct scsi_cmnd *, struct us_data*);
66extern int usb_stor_Bulk_max_lun(struct us_data*);
67extern int usb_stor_Bulk_reset(struct us_data*);
68
69extern void usb_stor_invoke_transport(struct scsi_cmnd *, struct us_data*);
70extern void usb_stor_stop_transport(struct us_data*);
71
72extern int usb_stor_control_msg(struct us_data *us, unsigned int pipe,
73 u8 request, u8 requesttype, u16 value, u16 index,
74 void *data, u16 size, int timeout);
75extern int usb_stor_clear_halt(struct us_data *us, unsigned int pipe);
76
77extern int usb_stor_ctrl_transfer(struct us_data *us, unsigned int pipe,
78 u8 request, u8 requesttype, u16 value, u16 index,
79 void *data, u16 size);
80extern int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe,
81 void *buf, unsigned int length, unsigned int *act_len);
82extern int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe,
83 void *buf, unsigned int length, int use_sg, int *residual);
84extern int usb_stor_bulk_srb(struct us_data* us, unsigned int pipe,
85 struct scsi_cmnd* srb);
86
87extern int usb_stor_port_reset(struct us_data *us);
88#endif
1/* Driver for USB Mass Storage compliant devices
2 * Transport 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 _TRANSPORT_H_
40#define _TRANSPORT_H_
41
42#include <linux/blkdev.h>
43
44/*
45 * usb_stor_bulk_transfer_xxx() return codes, in order of severity
46 */
47
48#define USB_STOR_XFER_GOOD 0 /* good transfer */
49#define USB_STOR_XFER_SHORT 1 /* transferred less than expected */
50#define USB_STOR_XFER_STALLED 2 /* endpoint stalled */
51#define USB_STOR_XFER_LONG 3 /* device tried to send too much */
52#define USB_STOR_XFER_ERROR 4 /* transfer died in the middle */
53
54/*
55 * Transport return codes
56 */
57
58#define USB_STOR_TRANSPORT_GOOD 0 /* Transport good, command good */
59#define USB_STOR_TRANSPORT_FAILED 1 /* Transport good, command failed */
60#define USB_STOR_TRANSPORT_NO_SENSE 2 /* Command failed, no auto-sense */
61#define USB_STOR_TRANSPORT_ERROR 3 /* Transport bad (i.e. device dead) */
62
63/*
64 * We used to have USB_STOR_XFER_ABORTED and USB_STOR_TRANSPORT_ABORTED
65 * return codes. But now the transport and low-level transfer routines
66 * treat an abort as just another error (-ENOENT for a cancelled URB).
67 * It is up to the invoke_transport() function to test for aborts and
68 * distinguish them from genuine communication errors.
69 */
70
71/*
72 * CBI accept device specific command
73 */
74
75#define US_CBI_ADSC 0
76
77extern int usb_stor_CB_transport(struct scsi_cmnd *, struct us_data*);
78extern int usb_stor_CB_reset(struct us_data*);
79
80extern int usb_stor_Bulk_transport(struct scsi_cmnd *, struct us_data*);
81extern int usb_stor_Bulk_max_lun(struct us_data*);
82extern int usb_stor_Bulk_reset(struct us_data*);
83
84extern void usb_stor_invoke_transport(struct scsi_cmnd *, struct us_data*);
85extern void usb_stor_stop_transport(struct us_data*);
86
87extern int usb_stor_control_msg(struct us_data *us, unsigned int pipe,
88 u8 request, u8 requesttype, u16 value, u16 index,
89 void *data, u16 size, int timeout);
90extern int usb_stor_clear_halt(struct us_data *us, unsigned int pipe);
91
92extern int usb_stor_ctrl_transfer(struct us_data *us, unsigned int pipe,
93 u8 request, u8 requesttype, u16 value, u16 index,
94 void *data, u16 size);
95extern int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe,
96 void *buf, unsigned int length, unsigned int *act_len);
97extern int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe,
98 void *buf, unsigned int length, int use_sg, int *residual);
99extern int usb_stor_bulk_srb(struct us_data* us, unsigned int pipe,
100 struct scsi_cmnd* srb);
101
102extern int usb_stor_port_reset(struct us_data *us);
103#endif