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 "MtpRequestPacket" 18 19 #include <stdio.h> 20 #include <sys/types.h> 21 #include <fcntl.h> 22 23 #include "MtpRequestPacket.h" 24 25 #include <usbhost/usbhost.h> 26 27 namespace android { 28 MtpRequestPacket()29MtpRequestPacket::MtpRequestPacket() 30 : MtpPacket(512) 31 { 32 } 33 ~MtpRequestPacket()34MtpRequestPacket::~MtpRequestPacket() { 35 } 36 37 #ifdef MTP_DEVICE read(int fd)38int MtpRequestPacket::read(int fd) { 39 int ret = ::read(fd, mBuffer, mBufferSize); 40 if (ret >= 0) 41 mPacketSize = ret; 42 else 43 mPacketSize = 0; 44 return ret; 45 } 46 #endif 47 48 #ifdef MTP_HOST 49 // write our buffer to the given endpoint (host mode) write(struct usb_request * request)50int MtpRequestPacket::write(struct usb_request *request) 51 { 52 putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize); 53 putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_COMMAND); 54 request->buffer = mBuffer; 55 request->buffer_length = mPacketSize; 56 return transfer(request); 57 } 58 #endif 59 60 } // namespace android 61