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 7 */ 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