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