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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* USB mass storage definitions.
*/
#ifndef USB_MS_H
#define USB_MS_H
#define USB_MS_SUBCLASS_RBC 0x01
#define USB_MS_SUBCLASS_MMC5 0x02
#define USB_MS_SUBCLASS_UFI 0x04
#define USB_MS_SUBCLASS_SCSI 0x06
#define USB_MS_SUBCLASS_LSDFS 0x07
#define USB_MS_SUBCLASS_IEEE1667 0x08
#define USB_MS_PROTOCOL_CBI_INTERRUPT 0x00
#define USB_MS_PROTOCOL_CBI 0x01
#define USB_MS_PROTOCOL_BBB 0x50
#define USB_MS_PROTOCOL_UAS 0x62
#define USB_MS_PACKET_SIZE (USB_MAX_PACKET_SIZE)
/* USB Mass Storage Command Block Wrapper */
struct usb_ms_cbw {
uint32_t signature;
uint32_t tag;
uint32_t data_transfer_length;
uint8_t flags;
uint8_t LUN;
uint8_t length;
uint8_t command_block[16];
} __packed;
#define USB_MS_CBW_LENGTH 31
#define USB_MS_CBW_SIGNATURE 0x43425355
#define USB_MS_CBW_DATA_IN (1 << 7)
/* USB Mass Storage Command Status Wrapper */
struct usb_ms_csw {
uint32_t signature;
uint32_t tag;
uint32_t data_residue;
uint8_t status;
} __packed;
#define USB_MS_CSW_LENGTH 13
#define UBS_MS_CSW_SIGNATURE 0x53425355
#define USB_MS_CSW_CMD_PASSED 0x0
#define USB_MS_CSW_CMD_FAILED 0x1
#define USB_MS_CSW_CMD_PHASE_ERR 0x2
#define USB_MS_REQ_RESET 0xff
#define USB_MS_REQ_GET_MAX_LUN 0xfe
#define USB_MS_EVENT_TX (1 << 0)
#define USB_MS_EVENT_RX (1 << 1)
/* Maximum number of supported LUN's, defined in SCSI file */
extern const uint8_t max_lun;
#endif /* USB_MS_H */
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