forked from Minki/linux
7cb2d993c4
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Oliver Neukum <oneukum@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for USB Mass Storage compliant devices
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* Protocol Functions Header File
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*
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* Current development and maintenance by:
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* (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
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*
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* This driver is based on the 'USB Mass Storage Class' document. This
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* describes in detail the protocol used to communicate with such
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* devices. Clearly, the designers had SCSI and ATAPI commands in
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* mind when they created this document. The commands are all very
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* similar to commands in the SCSI-II and ATAPI specifications.
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*
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* It is important to note that in a number of cases this class
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* exhibits class-specific exemptions from the USB specification.
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* Notably the usage of NAK, STALL and ACK differs from the norm, in
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* that they are used to communicate wait, failed and OK on commands.
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*
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* Also, for certain devices, the interrupt endpoint is used to convey
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* status of a command.
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*
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* Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
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* information about this driver.
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*/
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#ifndef _PROTOCOL_H_
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#define _PROTOCOL_H_
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/* Protocol handling routines */
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extern void usb_stor_pad12_command(struct scsi_cmnd*, struct us_data*);
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extern void usb_stor_ufi_command(struct scsi_cmnd*, struct us_data*);
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extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*,
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struct us_data*);
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/* struct scsi_cmnd transfer buffer access utilities */
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enum xfer_buf_dir {TO_XFER_BUF, FROM_XFER_BUF};
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extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer,
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unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **,
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unsigned int *offset, enum xfer_buf_dir dir);
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extern void usb_stor_set_xfer_buf(unsigned char *buffer,
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unsigned int buflen, struct scsi_cmnd *srb);
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#endif
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