92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
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* Most of this source has been derived from the Linux and
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* U-Boot USB Mass Storage driver implementations.
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*
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* Adapted for barebox:
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* Copyright (c) 2011, AMK Drives & Controls Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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*/
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#ifndef _TRANSPORT_H_
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#define _TRANSPORT_H_
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#include <scsi.h>
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/*
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* Bulk only data structures
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*/
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/* command block wrapper */
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struct bulk_cb_wrap {
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__le32 Signature; /* contains 'USBC' */
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__u32 Tag; /* unique per command id */
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__le32 DataTransferLength; /* size of data */
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__u8 Flags; /* direction in bit 7 */
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__u8 Lun; /* LUN normally 0 */
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__u8 Length; /* of of the CDB */
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__u8 CDB[16]; /* max command */
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};
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#define US_BULK_CB_WRAP_LEN 31
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#define US_BULK_CB_SIGN 0x43425355 /*spells out USBC */
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#define US_BULK_FLAG_IN (1<<7)
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#define US_BULK_FLAG_OUT (0<<7)
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/* command status wrapper */
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struct bulk_cs_wrap {
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__le32 Signature; /* should = 'USBS' */
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__u32 Tag; /* same as original command */
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__le32 Residue; /* amount not transferred */
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__u8 Status; /* see below */
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__u8 Filler[18];
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};
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#define US_BULK_CS_WRAP_LEN 13
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#define US_BULK_CS_SIGN 0x53425355 /* spells out 'USBS' */
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#define US_BULK_STAT_OK 0
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#define US_BULK_STAT_FAIL 1
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#define US_BULK_STAT_PHASE 2
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/* bulk-only class specific requests */
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#define US_BULK_RESET_REQUEST 0xff
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#define US_BULK_GET_MAX_LUN 0xfe
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/*
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* usb_stor_bulk_transfer_xxx() return codes, in order of severity
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*/
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#define USB_STOR_XFER_GOOD 0 /* good transfer */
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#define USB_STOR_XFER_SHORT 1 /* transferred less than expected */
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#define USB_STOR_XFER_STALLED 2 /* endpoint stalled */
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#define USB_STOR_XFER_LONG 3 /* device tried to send too much */
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#define USB_STOR_XFER_ERROR 4 /* transfer died in the middle */
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/*
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* Transport return codes
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*/
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#define USB_STOR_TRANSPORT_GOOD 0 /* Transport good, command good */
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#define USB_STOR_TRANSPORT_FAILED 1 /* Transport good, command failed */
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#define USB_STOR_TRANSPORT_NO_SENSE 2 /* Command failed, no auto-sense */
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#define USB_STOR_TRANSPORT_ERROR 3 /* Transport bad (i.e. device dead) */
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struct us_data;
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extern int usb_stor_Bulk_transport(ccb *, struct us_data *);
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extern int usb_stor_Bulk_max_lun(struct us_data *);
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extern int usb_stor_Bulk_reset(struct us_data *);
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#endif
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