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 */
52struct 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 */
68struct 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