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usb: gadget: mtp: Add MTP/PTP function

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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: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Benoit Goby
2011-12-19 14:37:50 -08:00
committed by John Stultz
parent 6d90f8a4b9
commit d79720cd89
2 changed files with 1358 additions and 0 deletions
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1283
drivers/usb/gadget/f_mtp.c Normal file
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75
include/linux/usb/f_mtp.h Normal file
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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 */