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
36 constexpr char mtp_dev_path[] = "/dev/mtp_usb";
37
38 class MtpDevHandle : public IMtpHandle {
39 private:
40 android::base::unique_fd mFd;
41
42 public:
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
MtpDevHandle()58 MtpDevHandle::MtpDevHandle()
59 : mFd(-1) {};
60
~MtpDevHandle()61 MtpDevHandle::~MtpDevHandle() {}
62
read(void * data,int len)63 int MtpDevHandle::read(void *data, int len) {
64 return ::read(mFd, data, len);
65 }
66
write(const void * data,int len)67 int MtpDevHandle::write(const void *data, int len) {
68 return ::write(mFd, data, len);
69 }
70
receiveFile(mtp_file_range mfr,bool)71 int MtpDevHandle::receiveFile(mtp_file_range mfr, bool) {
72 return ioctl(mFd, MTP_RECEIVE_FILE, reinterpret_cast<unsigned long>(&mfr));
73 }
74
sendFile(mtp_file_range mfr)75 int MtpDevHandle::sendFile(mtp_file_range mfr) {
76 return ioctl(mFd, MTP_SEND_FILE_WITH_HEADER, reinterpret_cast<unsigned long>(&mfr));
77 }
78
sendEvent(mtp_event me)79 int MtpDevHandle::sendEvent(mtp_event me) {
80 return ioctl(mFd, MTP_SEND_EVENT, reinterpret_cast<unsigned long>(&me));
81 }
82
start()83 int 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
close()89 void MtpDevHandle::close() {
90 mFd.reset();
91 }
92
configure(bool)93 int MtpDevHandle::configure(bool) {
94 // Nothing to do, driver can configure itself
95 return 0;
96 }
97
get_mtp_handle()98 IMtpHandle *get_mtp_handle() {
99 return new MtpDevHandle();
100 }
101