LXR linux/include/linux/usb/storage.h

   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 */
  54struct 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 */
  70struct 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
  88