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Commit 27d01e5d authored by Benoit Goby's avatar Benoit Goby Committed by Amit Pundir
Browse files

usb: gadget: mtp: Add MTP/PTP function 



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.

Change-Id: I2d8f2c37029fb37d8deb791d04eb7346f94f5adb
Signed-off-by: default avatarMike Lockwood <lockwood@android.com>
parent 90fc49b7

drivers/usb/gadget/f_mtp.c

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include/linux/usb/f_mtp.h

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/*

 * Gadget Function Driver for MTP

 *

 * Copyright (C) 2010 Google, Inc.

 * Author: Mike Lockwood <lockwood@android.com>

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */



#ifndef __LINUX_USB_F_MTP_H

#define __LINUX_USB_F_MTP_H



#include <linux/ioctl.h>



#ifdef __KERNEL__



struct mtp_data_header {

	/* length of packet, including this header */

	uint32_t	length;

	/* container type (2 for data packet) */

	uint16_t	type;

	/* MTP command code */

	uint16_t    command;

	/* MTP transaction ID */

	uint32_t	transaction_id;

};



#endif /* __KERNEL__ */



struct mtp_file_range {

	/* file descriptor for file to transfer */

	int			fd;

	/* offset in file for start of transfer */

	loff_t		offset;

	/* number of bytes to transfer */

	int64_t		length;

	/* MTP command ID for data header,

	 * used only for MTP_SEND_FILE_WITH_HEADER

	 */

	uint16_t	command;

	/* MTP transaction ID for data header,

	 * used only for MTP_SEND_FILE_WITH_HEADER

	 */

	uint32_t	transaction_id;

};



struct mtp_event {

	/* size of the event */

	size_t		length;

	/* event data to send */

	void		*data;

};



/* Sends the specified file range to the host */

#define MTP_SEND_FILE              _IOW('M', 0, struct mtp_file_range)

/* Receives data from the host and writes it to a file.

 * The file is created if it does not exist.

 */

#define MTP_RECEIVE_FILE           _IOW('M', 1, struct mtp_file_range)

/* Sends an event to the host via the interrupt endpoint */

#define MTP_SEND_EVENT             _IOW('M', 3, struct mtp_event)

/* Sends the specified file range to the host,

 * with a 12 byte MTP data packet header at the beginning.

 */

#define MTP_SEND_FILE_WITH_HEADER  _IOW('M', 4, struct mtp_file_range)



#endif /* __LINUX_USB_F_MTP_H */