1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or         implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <utils/Log.h>
18#include <fcntl.h>
19#include <sys/stat.h>
20#include <cutils/properties.h>
21#include <dirent.h>
22#include <errno.h>
23#include <linux/usb/ch9.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string.h>
27#include <sys/ioctl.h>
28#include <sys/types.h>
29#include <sys/endian.h>
30#include <unistd.h>
31
32#include <android-base/logging.h>
33#include <android-base/unique_fd.h>
34#include "IMtpHandle.h"
35
36constexpr char mtp_dev_path[] = "/dev/mtp_usb";
37
38class MtpDevHandle : public IMtpHandle {
39private:
40    android::base::unique_fd mFd;
41
42public:
43    MtpDevHandle();
44    ~MtpDevHandle();
45    int read(void *data, int len);
46    int write(const void *data, int len);
47
48    int receiveFile(mtp_file_range mfr, bool);
49    int sendFile(mtp_file_range mfr);
50    int sendEvent(mtp_event me);
51
52    int start();
53    void close();
54
55    int configure(bool ptp);
56};
57
58MtpDevHandle::MtpDevHandle()
59    : mFd(-1) {};
60
61MtpDevHandle::~MtpDevHandle() {}
62
63int MtpDevHandle::read(void *data, int len) {
64    return ::read(mFd, data, len);
65}
66
67int MtpDevHandle::write(const void *data, int len) {
68    return ::write(mFd, data, len);
69}
70
71int MtpDevHandle::receiveFile(mtp_file_range mfr, bool) {
72    return ioctl(mFd, MTP_RECEIVE_FILE, reinterpret_cast<unsigned long>(&mfr));
73}
74
75int MtpDevHandle::sendFile(mtp_file_range mfr) {
76    return ioctl(mFd, MTP_SEND_FILE_WITH_HEADER, reinterpret_cast<unsigned long>(&mfr));
77}
78
79int MtpDevHandle::sendEvent(mtp_event me) {
80    return ioctl(mFd, MTP_SEND_EVENT, reinterpret_cast<unsigned long>(&me));
81}
82
83int MtpDevHandle::start() {
84    mFd = android::base::unique_fd(TEMP_FAILURE_RETRY(open(mtp_dev_path, O_RDWR)));
85    if (mFd == -1) return -1;
86    return 0;
87}
88
89void MtpDevHandle::close() {
90    mFd.reset();
91}
92
93int MtpDevHandle::configure(bool) {
94    // Nothing to do, driver can configure itself
95    return 0;
96}
97
98IMtpHandle *get_mtp_handle() {
99    return new MtpDevHandle();
100}
101