xref: /openbmc/linux/include/linux/usb/storage.h (revision e3fa404a)
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