1 /*
2 * Copyright (C) 2010 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 #define LOG_TAG "MtpEventPacket"
18
19 #include <stdio.h>
20 #include <sys/types.h>
21 #include <fcntl.h>
22 #include <sys/ioctl.h>
23
24 #ifdef MTP_DEVICE
25 #include <linux/usb/f_mtp.h>
26 #endif
27
28 #include "MtpEventPacket.h"
29
30 #include <usbhost/usbhost.h>
31
32 namespace android {
33
MtpEventPacket()34 MtpEventPacket::MtpEventPacket()
35 : MtpPacket(512)
36 {
37 }
38
~MtpEventPacket()39 MtpEventPacket::~MtpEventPacket() {
40 }
41
42 #ifdef MTP_DEVICE
write(int fd)43 int MtpEventPacket::write(int fd) {
44 struct mtp_event event;
45
46 putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize);
47 putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_EVENT);
48
49 event.data = mBuffer;
50 event.length = mPacketSize;
51 int ret = ::ioctl(fd, MTP_SEND_EVENT, (unsigned long)&event);
52 return (ret < 0 ? ret : 0);
53 }
54 #endif
55
56 #ifdef MTP_HOST
sendRequest(struct usb_request * request)57 int MtpEventPacket::sendRequest(struct usb_request *request) {
58 request->buffer = mBuffer;
59 request->buffer_length = mBufferSize;
60 mPacketSize = 0;
61 if (usb_request_queue(request)) {
62 ALOGE("usb_endpoint_queue failed, errno: %d", errno);
63 return -1;
64 }
65 return 0;
66 }
67
readResponse(struct usb_device * device)68 int MtpEventPacket::readResponse(struct usb_device *device) {
69 struct usb_request* const req = usb_request_wait(device);
70 if (req) {
71 mPacketSize = req->actual_length;
72 return req->actual_length;
73 } else {
74 return -1;
75 }
76 }
77 #endif
78
79 } // namespace android
80