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 34 MtpEventPacket::MtpEventPacket() 35 : MtpPacket(512) 36 { 37 } 38 39 MtpEventPacket::~MtpEventPacket() { 40 } 41 42 #ifdef MTP_DEVICE 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 57 int MtpEventPacket::read(struct usb_request *request) { 58 request->buffer = mBuffer; 59 request->buffer_length = mBufferSize; 60 int ret = transfer(request); 61 if (ret >= 0) 62 mPacketSize = ret; 63 else 64 mPacketSize = 0; 65 return ret; 66 } 67 #endif 68 69 } // namespace android 70 71
