1 // SPDX-License-Identifier: GPL-2.0
2 #ifndef __LINUX_USB_STORAGE_H
3 #define __LINUX_USB_STORAGE_H
4
5 /*
6 * linux/usb/storage.h
7 *
8 * Copyright Matthew Wilcox for Intel Corp, 2010
9 *
10 * This file contains definitions taken from the
11 * USB Mass Storage Class Specification Overview
12 *
13 * Distributed under the terms of the GNU GPL, version two.
14 */
15
16 /* Storage subclass codes */
17
18 #define USB_SC_RBC 0x01 /* Typically, flash devices */
19 #define USB_SC_8020 0x02 /* CD-ROM */
20 #define USB_SC_QIC 0x03 /* QIC-157 Tapes */
21 #define USB_SC_UFI 0x04 /* Floppy */
22 #define USB_SC_8070 0x05 /* Removable media */
23 #define USB_SC_SCSI 0x06 /* Transparent */
24 #define USB_SC_LOCKABLE 0x07 /* Password-protected */
25
26 #define USB_SC_ISD200 0xf0 /* ISD200 ATA */
27 #define USB_SC_CYP_ATACB 0xf1 /* Cypress ATACB */
28 #define USB_SC_DEVICE 0xff /* Use device's value */
29
30 /* Storage protocol codes */
31
32 #define USB_PR_CBI 0x00 /* Control/Bulk/Interrupt */
33 #define USB_PR_CB 0x01 /* Control/Bulk w/o interrupt */
34 #define USB_PR_BULK 0x50 /* bulk only */
35 #define USB_PR_UAS 0x62 /* USB Attached SCSI */
36
37 #define USB_PR_USBAT 0x80 /* SCM-ATAPI bridge */
38 #define USB_PR_EUSB_SDDR09 0x81 /* SCM-SCSI bridge for SDDR-09 */
39 #define USB_PR_SDDR55 0x82 /* SDDR-55 (made up) */
40 #define USB_PR_DPCM_USB 0xf0 /* Combination CB/SDDR09 */
41 #define USB_PR_FREECOM 0xf1 /* Freecom */
42 #define USB_PR_DATAFAB 0xf2 /* Datafab chipsets */
43 #define USB_PR_JUMPSHOT 0xf3 /* Lexar Jumpshot */
44 #define USB_PR_ALAUDA 0xf4 /* Alauda chipsets */
45 #define USB_PR_KARMA 0xf5 /* Rio Karma */
46
47 #define USB_PR_DEVICE 0xff /* Use device's value */
48
49 /*
50 * Bulk only data structures
51 */
52
53 /* command block wrapper */
54 struct bulk_cb_wrap {
55 __le32 Signature; /* contains 'USBC' */
56 __u32 Tag; /* unique per command id */
57 __le32 DataTransferLength; /* size of data */
58 __u8 Flags; /* direction in bit 0 */
59 __u8 Lun; /* LUN normally 0 */
60 __u8 Length; /* length of the CDB */
61 __u8 CDB[16]; /* max command */
62 };
63
64 #define US_BULK_CB_WRAP_LEN 31
65 #define US_BULK_CB_SIGN 0x43425355 /* spells out 'USBC' */
66 #define US_BULK_FLAG_IN (1 << 7)
67 #define US_BULK_FLAG_OUT 0
68
69 /* command status wrapper */
70 struct bulk_cs_wrap {
71 __le32 Signature; /* contains 'USBS' */
72 __u32 Tag; /* same as original command */
73 __le32 Residue; /* amount not transferred */
74 __u8 Status; /* see below */
75 };
76
77 #define US_BULK_CS_WRAP_LEN 13
78 #define US_BULK_CS_SIGN 0x53425355 /* spells out 'USBS' */
79 #define US_BULK_STAT_OK 0
80 #define US_BULK_STAT_FAIL 1
81 #define US_BULK_STAT_PHASE 2
82
83 /* bulk-only class specific requests */
84 #define US_BULK_RESET_REQUEST 0xff
85 #define US_BULK_GET_MAX_LUN 0xfe
86
87 #endif