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c9809547c2
implement USB mass storage class using the bulk-only transport protocol with the transparent SCSI command set. BRANCH=none BUG=none TEST=verify that usb mass storage functions on windows xp, 7, 8, mac os x, goobuntu precise Change-Id: Ideecad55bd275df7b30aa4a3ed263304a3a109cd Signed-off-by: Dominic Chen <ddchen@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/206303 Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* USB mass storage definitions.
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*/
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#ifndef USB_MS_H
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#define USB_MS_H
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#define USB_MS_SUBCLASS_RBC 0x01
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#define USB_MS_SUBCLASS_MMC5 0x02
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#define USB_MS_SUBCLASS_UFI 0x04
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#define USB_MS_SUBCLASS_SCSI 0x06
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#define USB_MS_SUBCLASS_LSDFS 0x07
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#define USB_MS_SUBCLASS_IEEE1667 0x08
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#define USB_MS_PROTOCOL_CBI_INTERRUPT 0x00
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#define USB_MS_PROTOCOL_CBI 0x01
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#define USB_MS_PROTOCOL_BBB 0x50
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#define USB_MS_PROTOCOL_UAS 0x62
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#define USB_MS_PACKET_SIZE (USB_MAX_PACKET_SIZE)
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/* USB Mass Storage Command Block Wrapper */
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struct usb_ms_cbw {
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uint32_t signature;
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uint32_t tag;
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uint32_t data_transfer_length;
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uint8_t flags;
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uint8_t LUN;
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uint8_t length;
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uint8_t command_block[16];
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} __packed;
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#define USB_MS_CBW_LENGTH 31
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#define USB_MS_CBW_SIGNATURE 0x43425355
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#define USB_MS_CBW_DATA_IN (1 << 7)
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/* USB Mass Storage Command Status Wrapper */
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struct usb_ms_csw {
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uint32_t signature;
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uint32_t tag;
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uint32_t data_residue;
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uint8_t status;
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} __packed;
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#define USB_MS_CSW_LENGTH 13
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#define UBS_MS_CSW_SIGNATURE 0x53425355
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#define USB_MS_CSW_CMD_PASSED 0x0
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#define USB_MS_CSW_CMD_FAILED 0x1
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#define USB_MS_CSW_CMD_PHASE_ERR 0x2
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#define USB_MS_REQ_RESET 0xff
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#define USB_MS_REQ_GET_MAX_LUN 0xfe
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#define USB_MS_EVENT_TX (1 << 0)
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#define USB_MS_EVENT_RX (1 << 1)
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/* Maximum number of supported LUN's, defined in SCSI file */
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extern const uint8_t max_lun;
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#endif /* USB_MS_H */
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