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f0fbc48125
USB gadget function driver used by the Android framework to implement the MTP and PTP protocols. It creates a character device that provides an interface for fast transfer of files and supports transferring files greater than 4GB. Signed-off-by: Mike Lockwood <lockwood@android.com>
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
/*
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* Gadget Function Driver for MTP
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*
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* Copyright (C) 2010 Google, Inc.
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* Author: Mike Lockwood <lockwood@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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#ifndef __LINUX_USB_F_MTP_H
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#define __LINUX_USB_F_MTP_H
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#include <linux/ioctl.h>
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#ifdef __KERNEL__
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struct mtp_data_header {
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/* length of packet, including this header */
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uint32_t length;
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/* container type (2 for data packet) */
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uint16_t type;
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/* MTP command code */
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uint16_t command;
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/* MTP transaction ID */
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uint32_t transaction_id;
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};
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#endif /* __KERNEL__ */
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struct mtp_file_range {
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/* file descriptor for file to transfer */
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int fd;
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/* offset in file for start of transfer */
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loff_t offset;
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/* number of bytes to transfer */
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int64_t length;
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/* MTP command ID for data header,
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* used only for MTP_SEND_FILE_WITH_HEADER
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*/
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uint16_t command;
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/* MTP transaction ID for data header,
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* used only for MTP_SEND_FILE_WITH_HEADER
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*/
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uint32_t transaction_id;
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};
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struct mtp_event {
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/* size of the event */
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size_t length;
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/* event data to send */
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void *data;
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};
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/* Sends the specified file range to the host */
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#define MTP_SEND_FILE _IOW('M', 0, struct mtp_file_range)
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/* Receives data from the host and writes it to a file.
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* The file is created if it does not exist.
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*/
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#define MTP_RECEIVE_FILE _IOW('M', 1, struct mtp_file_range)
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/* Sends an event to the host via the interrupt endpoint */
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#define MTP_SEND_EVENT _IOW('M', 3, struct mtp_event)
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/* Sends the specified file range to the host,
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* with a 12 byte MTP data packet header at the beginning.
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*/
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#define MTP_SEND_FILE_WITH_HEADER _IOW('M', 4, struct mtp_file_range)
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#endif /* __LINUX_USB_F_MTP_H */
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