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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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/* * linux/usb/storage.h * * Copyright Matthew Wilcox for Intel Corp, 2010 * * This file contains definitions taken from the * USB Mass Storage Class Specification Overview */
/* Storage subclass codes */
#define USB_SC_RBC 0x01 /* Typically, flash devices */#define USB_SC_8020 0x02 /* CD-ROM */#define USB_SC_QIC 0x03 /* QIC-157 Tapes */#define USB_SC_UFI 0x04 /* Floppy */#define USB_SC_8070 0x05 /* Removable media */#define USB_SC_SCSI 0x06 /* Transparent */#define USB_SC_LOCKABLE 0x07 /* Password-protected */
#define USB_SC_ISD200 0xf0 /* ISD200 ATA */#define USB_SC_CYP_ATACB 0xf1 /* Cypress ATACB */#define USB_SC_DEVICE 0xff /* Use device's value */
/* Storage protocol codes */
#define USB_PR_CBI 0x00 /* Control/Bulk/Interrupt */#define USB_PR_CB 0x01 /* Control/Bulk w/o interrupt */#define USB_PR_BULK 0x50 /* bulk only */#define USB_PR_UAS 0x62 /* USB Attached SCSI */
#define USB_PR_USBAT 0x80 /* SCM-ATAPI bridge */#define USB_PR_EUSB_SDDR09 0x81 /* SCM-SCSI bridge for SDDR-09 */#define USB_PR_SDDR55 0x82 /* SDDR-55 (made up) */#define USB_PR_DPCM_USB 0xf0 /* Combination CB/SDDR09 */#define USB_PR_FREECOM 0xf1 /* Freecom */#define USB_PR_DATAFAB 0xf2 /* Datafab chipsets */#define USB_PR_JUMPSHOT 0xf3 /* Lexar Jumpshot */#define USB_PR_ALAUDA 0xf4 /* Alauda chipsets */#define USB_PR_KARMA 0xf5 /* Rio Karma */
#define USB_PR_DEVICE 0xff /* Use device's value */
/* * Bulk only data structures */
/* command block wrapper */struct bulk_cb_wrap { __le32 Signature; /* contains 'USBC' */ __u32 Tag; /* unique per command id */ __le32 DataTransferLength; /* size of data */ __u8 Flags; /* direction in bit 7 */ __u8 Lun; /* LUN normally 0 */ __u8 Length; /* length of the CDB */ __u8 CDB[16]; /* max command */};
#define US_BULK_CB_WRAP_LEN 31#define US_BULK_CB_SIGN 0x43425355 /* spells out 'USBC' */#define US_BULK_FLAG_IN (1 << 7)#define US_BULK_FLAG_OUT 0
/* command status wrapper */struct bulk_cs_wrap { __le32 Signature; /* contains 'USBS' */ __u32 Tag; /* same as original command */ __le32 Residue; /* amount not transferred */ __u8 Status; /* see below */};
#define US_BULK_CS_WRAP_LEN 13#define US_BULK_CS_SIGN 0x53425355 /* spells out 'USBS' */#define US_BULK_STAT_OK 0#define US_BULK_STAT_FAIL 1#define US_BULK_STAT_PHASE 2
/* bulk-only class specific requests */#define US_BULK_RESET_REQUEST 0xff#define US_BULK_GET_MAX_LUN 0xfe
/* * If 4 LUNs are supported then the LUNs would be * numbered from 0 to 3, and the return value for * US_BULK_GET_MAX_LUN request would be 3. The valid * LUN field is 4 bits wide, the upper limit is 0x0f. */#define US_BULK_MAX_LUN_LIMIT 0x0f
#endif