| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "MtpDevice" |
| |
| #include "MtpDebug.h" |
| #include "MtpDevice.h" |
| #include "MtpDeviceInfo.h" |
| #include "MtpObjectInfo.h" |
| #include "MtpProperty.h" |
| #include "MtpStorageInfo.h" |
| #include "MtpStringBuffer.h" |
| #include "MtpUtils.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <sys/ioctl.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <endian.h> |
| |
| #include <usbhost/usbhost.h> |
| |
| namespace android { |
| |
| static bool isMtpDevice(uint16_t vendor, uint16_t product) { |
| // Sandisk Sansa Fuze |
| if (vendor == 0x0781 && product == 0x74c2) |
| return true; |
| // Samsung YP-Z5 |
| if (vendor == 0x04e8 && product == 0x503c) |
| return true; |
| return false; |
| } |
| |
| MtpDevice* MtpDevice::open(const char* deviceName, int fd) { |
| struct usb_device *device = usb_device_new(deviceName, fd); |
| if (!device) { |
| LOGE("usb_device_new failed for %s", deviceName); |
| return NULL; |
| } |
| |
| struct usb_descriptor_header* desc; |
| struct usb_descriptor_iter iter; |
| |
| usb_descriptor_iter_init(device, &iter); |
| |
| while ((desc = usb_descriptor_iter_next(&iter)) != NULL) { |
| if (desc->bDescriptorType == USB_DT_INTERFACE) { |
| struct usb_interface_descriptor *interface = (struct usb_interface_descriptor *)desc; |
| |
| if (interface->bInterfaceClass == USB_CLASS_STILL_IMAGE && |
| interface->bInterfaceSubClass == 1 && // Still Image Capture |
| interface->bInterfaceProtocol == 1) // Picture Transfer Protocol (PIMA 15470) |
| { |
| LOGD("Found camera: \"%s\" \"%s\"\n", usb_device_get_manufacturer_name(device), |
| usb_device_get_product_name(device)); |
| } else if (interface->bInterfaceClass == 0xFF && |
| interface->bInterfaceSubClass == 0xFF && |
| interface->bInterfaceProtocol == 0) { |
| char* interfaceName = usb_device_get_string(device, interface->iInterface); |
| if (!interfaceName || strcmp(interfaceName, "MTP")) |
| continue; |
| // Looks like an android style MTP device |
| LOGD("Found MTP device: \"%s\" \"%s\"\n", usb_device_get_manufacturer_name(device), |
| usb_device_get_product_name(device)); |
| } else { |
| // look for special cased devices based on vendor/product ID |
| // we are doing this mainly for testing purposes |
| uint16_t vendor = usb_device_get_vendor_id(device); |
| uint16_t product = usb_device_get_product_id(device); |
| if (!isMtpDevice(vendor, product)) { |
| // not an MTP or PTP device |
| continue; |
| } |
| // request MTP OS string and descriptor |
| // some music players need to see this before entering MTP mode. |
| char buffer[256]; |
| memset(buffer, 0, sizeof(buffer)); |
| int ret = usb_device_send_control(device, |
| USB_DIR_IN|USB_RECIP_DEVICE|USB_TYPE_STANDARD, |
| USB_REQ_GET_DESCRIPTOR, (USB_DT_STRING << 8) | 0xEE, |
| 0, sizeof(buffer), buffer); |
| printf("usb_device_send_control returned %d errno: %d\n", ret, errno); |
| if (ret > 0) { |
| printf("got MTP string %s\n", buffer); |
| ret = usb_device_send_control(device, |
| USB_DIR_IN|USB_RECIP_DEVICE|USB_TYPE_VENDOR, 1, |
| 0, 4, sizeof(buffer), buffer); |
| printf("OS descriptor got %d\n", ret); |
| } else { |
| printf("no MTP string\n"); |
| } |
| } |
| |
| // if we got here, then we have a likely MTP or PTP device |
| |
| // interface should be followed by three endpoints |
| struct usb_endpoint_descriptor *ep; |
| struct usb_endpoint_descriptor *ep_in_desc = NULL; |
| struct usb_endpoint_descriptor *ep_out_desc = NULL; |
| struct usb_endpoint_descriptor *ep_intr_desc = NULL; |
| for (int i = 0; i < 3; i++) { |
| ep = (struct usb_endpoint_descriptor *)usb_descriptor_iter_next(&iter); |
| if (!ep || ep->bDescriptorType != USB_DT_ENDPOINT) { |
| LOGE("endpoints not found\n"); |
| return NULL; |
| } |
| if (ep->bmAttributes == USB_ENDPOINT_XFER_BULK) { |
| if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) |
| ep_in_desc = ep; |
| else |
| ep_out_desc = ep; |
| } else if (ep->bmAttributes == USB_ENDPOINT_XFER_INT && |
| ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) { |
| ep_intr_desc = ep; |
| } |
| } |
| if (!ep_in_desc || !ep_out_desc || !ep_intr_desc) { |
| LOGE("endpoints not found\n"); |
| return NULL; |
| } |
| |
| if (usb_device_claim_interface(device, interface->bInterfaceNumber)) { |
| LOGE("usb_device_claim_interface failed errno: %d\n", errno); |
| return NULL; |
| } |
| |
| MtpDevice* mtpDevice = new MtpDevice(device, interface->bInterfaceNumber, |
| ep_in_desc, ep_out_desc, ep_intr_desc); |
| mtpDevice->initialize(); |
| return mtpDevice; |
| } |
| } |
| |
| usb_device_close(device); |
| LOGE("device not found"); |
| return NULL; |
| } |
| |
| MtpDevice::MtpDevice(struct usb_device* device, int interface, |
| const struct usb_endpoint_descriptor *ep_in, |
| const struct usb_endpoint_descriptor *ep_out, |
| const struct usb_endpoint_descriptor *ep_intr) |
| : mDevice(device), |
| mInterface(interface), |
| mRequestIn1(NULL), |
| mRequestIn2(NULL), |
| mRequestOut(NULL), |
| mRequestIntr(NULL), |
| mDeviceInfo(NULL), |
| mSessionID(0), |
| mTransactionID(0), |
| mReceivedResponse(false) |
| { |
| mRequestIn1 = usb_request_new(device, ep_in); |
| mRequestIn2 = usb_request_new(device, ep_in); |
| mRequestOut = usb_request_new(device, ep_out); |
| mRequestIntr = usb_request_new(device, ep_intr); |
| } |
| |
| MtpDevice::~MtpDevice() { |
| close(); |
| for (int i = 0; i < mDeviceProperties.size(); i++) |
| delete mDeviceProperties[i]; |
| usb_request_free(mRequestIn1); |
| usb_request_free(mRequestIn2); |
| usb_request_free(mRequestOut); |
| usb_request_free(mRequestIntr); |
| } |
| |
| void MtpDevice::initialize() { |
| openSession(); |
| mDeviceInfo = getDeviceInfo(); |
| if (mDeviceInfo) { |
| if (mDeviceInfo->mDeviceProperties) { |
| int count = mDeviceInfo->mDeviceProperties->size(); |
| for (int i = 0; i < count; i++) { |
| MtpDeviceProperty propCode = (*mDeviceInfo->mDeviceProperties)[i]; |
| MtpProperty* property = getDevicePropDesc(propCode); |
| if (property) |
| mDeviceProperties.push(property); |
| } |
| } |
| } |
| } |
| |
| void MtpDevice::close() { |
| if (mDevice) { |
| usb_device_release_interface(mDevice, mInterface); |
| usb_device_close(mDevice); |
| mDevice = NULL; |
| } |
| } |
| |
| void MtpDevice::print() { |
| if (mDeviceInfo) { |
| mDeviceInfo->print(); |
| |
| if (mDeviceInfo->mDeviceProperties) { |
| LOGI("***** DEVICE PROPERTIES *****\n"); |
| int count = mDeviceInfo->mDeviceProperties->size(); |
| for (int i = 0; i < count; i++) { |
| MtpDeviceProperty propCode = (*mDeviceInfo->mDeviceProperties)[i]; |
| MtpProperty* property = getDevicePropDesc(propCode); |
| if (property) { |
| property->print(); |
| } |
| } |
| } |
| } |
| |
| if (mDeviceInfo->mPlaybackFormats) { |
| LOGI("***** OBJECT PROPERTIES *****\n"); |
| int count = mDeviceInfo->mPlaybackFormats->size(); |
| for (int i = 0; i < count; i++) { |
| MtpObjectFormat format = (*mDeviceInfo->mPlaybackFormats)[i]; |
| LOGI("*** FORMAT: %s\n", MtpDebug::getFormatCodeName(format)); |
| MtpObjectPropertyList* props = getObjectPropsSupported(format); |
| if (props) { |
| for (int j = 0; j < props->size(); j++) { |
| MtpObjectProperty prop = (*props)[j]; |
| MtpProperty* property = getObjectPropDesc(prop, format); |
| if (property) |
| property->print(); |
| else |
| LOGE("could not fetch property: %s", |
| MtpDebug::getObjectPropCodeName(prop)); |
| } |
| } |
| } |
| } |
| } |
| |
| const char* MtpDevice::getDeviceName() { |
| if (mDevice) |
| return usb_device_get_name(mDevice); |
| else |
| return "???"; |
| } |
| |
| bool MtpDevice::openSession() { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mSessionID = 0; |
| mTransactionID = 0; |
| MtpSessionID newSession = 1; |
| mRequest.reset(); |
| mRequest.setParameter(1, newSession); |
| if (!sendRequest(MTP_OPERATION_OPEN_SESSION)) |
| return false; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_SESSION_ALREADY_OPEN) |
| newSession = mResponse.getParameter(1); |
| else if (ret != MTP_RESPONSE_OK) |
| return false; |
| |
| mSessionID = newSession; |
| mTransactionID = 1; |
| return true; |
| } |
| |
| bool MtpDevice::closeSession() { |
| // FIXME |
| return true; |
| } |
| |
| MtpDeviceInfo* MtpDevice::getDeviceInfo() { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| if (!sendRequest(MTP_OPERATION_GET_DEVICE_INFO)) |
| return NULL; |
| if (!readData()) |
| return NULL; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| MtpDeviceInfo* info = new MtpDeviceInfo; |
| info->read(mData); |
| return info; |
| } |
| return NULL; |
| } |
| |
| MtpStorageIDList* MtpDevice::getStorageIDs() { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| if (!sendRequest(MTP_OPERATION_GET_STORAGE_IDS)) |
| return NULL; |
| if (!readData()) |
| return NULL; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| return mData.getAUInt32(); |
| } |
| return NULL; |
| } |
| |
| MtpStorageInfo* MtpDevice::getStorageInfo(MtpStorageID storageID) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, storageID); |
| if (!sendRequest(MTP_OPERATION_GET_STORAGE_INFO)) |
| return NULL; |
| if (!readData()) |
| return NULL; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| MtpStorageInfo* info = new MtpStorageInfo(storageID); |
| info->read(mData); |
| return info; |
| } |
| return NULL; |
| } |
| |
| MtpObjectHandleList* MtpDevice::getObjectHandles(MtpStorageID storageID, |
| MtpObjectFormat format, MtpObjectHandle parent) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, storageID); |
| mRequest.setParameter(2, format); |
| mRequest.setParameter(3, parent); |
| if (!sendRequest(MTP_OPERATION_GET_OBJECT_HANDLES)) |
| return NULL; |
| if (!readData()) |
| return NULL; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| return mData.getAUInt32(); |
| } |
| return NULL; |
| } |
| |
| MtpObjectInfo* MtpDevice::getObjectInfo(MtpObjectHandle handle) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| // FIXME - we might want to add some caching here |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, handle); |
| if (!sendRequest(MTP_OPERATION_GET_OBJECT_INFO)) |
| return NULL; |
| if (!readData()) |
| return NULL; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| MtpObjectInfo* info = new MtpObjectInfo(handle); |
| info->read(mData); |
| return info; |
| } |
| return NULL; |
| } |
| |
| void* MtpDevice::getThumbnail(MtpObjectHandle handle, int& outLength) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, handle); |
| if (sendRequest(MTP_OPERATION_GET_THUMB) && readData()) { |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| return mData.getData(outLength); |
| } |
| } |
| outLength = 0; |
| return NULL; |
| } |
| |
| MtpObjectHandle MtpDevice::sendObjectInfo(MtpObjectInfo* info) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| MtpObjectHandle parent = info->mParent; |
| if (parent == 0) |
| parent = MTP_PARENT_ROOT; |
| |
| mRequest.setParameter(1, info->mStorageID); |
| mRequest.setParameter(2, info->mParent); |
| |
| mData.putUInt32(info->mStorageID); |
| mData.putUInt16(info->mFormat); |
| mData.putUInt16(info->mProtectionStatus); |
| mData.putUInt32(info->mCompressedSize); |
| mData.putUInt16(info->mThumbFormat); |
| mData.putUInt32(info->mThumbCompressedSize); |
| mData.putUInt32(info->mThumbPixWidth); |
| mData.putUInt32(info->mThumbPixHeight); |
| mData.putUInt32(info->mImagePixWidth); |
| mData.putUInt32(info->mImagePixHeight); |
| mData.putUInt32(info->mImagePixDepth); |
| mData.putUInt32(info->mParent); |
| mData.putUInt16(info->mAssociationType); |
| mData.putUInt32(info->mAssociationDesc); |
| mData.putUInt32(info->mSequenceNumber); |
| mData.putString(info->mName); |
| |
| char created[100], modified[100]; |
| formatDateTime(info->mDateCreated, created, sizeof(created)); |
| formatDateTime(info->mDateModified, modified, sizeof(modified)); |
| |
| mData.putString(created); |
| mData.putString(modified); |
| if (info->mKeywords) |
| mData.putString(info->mKeywords); |
| else |
| mData.putEmptyString(); |
| |
| if (sendRequest(MTP_OPERATION_SEND_OBJECT_INFO) && sendData()) { |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| info->mStorageID = mResponse.getParameter(1); |
| info->mParent = mResponse.getParameter(2); |
| info->mHandle = mResponse.getParameter(3); |
| return info->mHandle; |
| } |
| } |
| return (MtpObjectHandle)-1; |
| } |
| |
| bool MtpDevice::sendObject(MtpObjectInfo* info, int srcFD) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| int remaining = info->mCompressedSize; |
| mRequest.reset(); |
| mRequest.setParameter(1, info->mHandle); |
| if (sendRequest(MTP_OPERATION_SEND_OBJECT)) { |
| // send data header |
| writeDataHeader(MTP_OPERATION_SEND_OBJECT, remaining); |
| |
| char buffer[65536]; |
| while (remaining > 0) { |
| int count = read(srcFD, buffer, sizeof(buffer)); |
| if (count > 0) { |
| int written = mData.write(mRequestOut, buffer, count); |
| // FIXME check error |
| remaining -= count; |
| } else { |
| break; |
| } |
| } |
| } |
| MtpResponseCode ret = readResponse(); |
| return (remaining == 0 && ret == MTP_RESPONSE_OK); |
| } |
| |
| bool MtpDevice::deleteObject(MtpObjectHandle handle) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, handle); |
| if (sendRequest(MTP_OPERATION_DELETE_OBJECT)) { |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) |
| return true; |
| } |
| return false; |
| } |
| |
| MtpObjectHandle MtpDevice::getParent(MtpObjectHandle handle) { |
| MtpObjectInfo* info = getObjectInfo(handle); |
| if (info) |
| return info->mParent; |
| else |
| return -1; |
| } |
| |
| MtpObjectHandle MtpDevice::getStorageID(MtpObjectHandle handle) { |
| MtpObjectInfo* info = getObjectInfo(handle); |
| if (info) |
| return info->mStorageID; |
| else |
| return -1; |
| } |
| |
| MtpObjectPropertyList* MtpDevice::getObjectPropsSupported(MtpObjectFormat format) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, format); |
| if (!sendRequest(MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED)) |
| return NULL; |
| if (!readData()) |
| return NULL; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| return mData.getAUInt16(); |
| } |
| return NULL; |
| |
| } |
| |
| MtpProperty* MtpDevice::getDevicePropDesc(MtpDeviceProperty code) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, code); |
| if (!sendRequest(MTP_OPERATION_GET_DEVICE_PROP_DESC)) |
| return NULL; |
| if (!readData()) |
| return NULL; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| MtpProperty* property = new MtpProperty; |
| property->read(mData); |
| return property; |
| } |
| return NULL; |
| } |
| |
| MtpProperty* MtpDevice::getObjectPropDesc(MtpObjectProperty code, MtpObjectFormat format) { |
| Mutex::Autolock autoLock(mMutex); |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, code); |
| mRequest.setParameter(2, format); |
| if (!sendRequest(MTP_OPERATION_GET_OBJECT_PROP_DESC)) |
| return NULL; |
| if (!readData()) |
| return NULL; |
| MtpResponseCode ret = readResponse(); |
| if (ret == MTP_RESPONSE_OK) { |
| MtpProperty* property = new MtpProperty; |
| property->read(mData); |
| return property; |
| } |
| return NULL; |
| } |
| |
| bool MtpDevice::readObject(MtpObjectHandle handle, |
| bool (* callback)(void* data, int offset, int length, void* clientData), |
| int objectSize, void* clientData) { |
| Mutex::Autolock autoLock(mMutex); |
| bool result = false; |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, handle); |
| if (sendRequest(MTP_OPERATION_GET_OBJECT) |
| && mData.readDataHeader(mRequestIn1)) { |
| uint32_t length = mData.getContainerLength(); |
| if (length - MTP_CONTAINER_HEADER_SIZE != objectSize) { |
| LOGE("readObject error objectSize: %d, length: %d", |
| objectSize, length); |
| goto fail; |
| } |
| length -= MTP_CONTAINER_HEADER_SIZE; |
| uint32_t remaining = length; |
| int offset = 0; |
| |
| int initialDataLength = 0; |
| void* initialData = mData.getData(initialDataLength); |
| if (initialData) { |
| if (initialDataLength > 0) { |
| if (!callback(initialData, 0, initialDataLength, clientData)) |
| goto fail; |
| remaining -= initialDataLength; |
| offset += initialDataLength; |
| } |
| free(initialData); |
| } |
| |
| // USB reads greater than 16K don't work |
| char buffer1[16384], buffer2[16384]; |
| mRequestIn1->buffer = buffer1; |
| mRequestIn2->buffer = buffer2; |
| struct usb_request* req = mRequestIn1; |
| void* writeBuffer = NULL; |
| int writeLength = 0; |
| |
| while (remaining > 0 || writeBuffer) { |
| if (remaining > 0) { |
| // queue up a read request |
| req->buffer_length = (remaining > sizeof(buffer1) ? sizeof(buffer1) : remaining); |
| if (mData.readDataAsync(req)) { |
| LOGE("readDataAsync failed"); |
| goto fail; |
| } |
| } else { |
| req = NULL; |
| } |
| |
| if (writeBuffer) { |
| // write previous buffer |
| if (!callback(writeBuffer, offset, writeLength, clientData)) { |
| LOGE("write failed"); |
| // wait for pending read before failing |
| if (req) |
| mData.readDataWait(mDevice); |
| goto fail; |
| } |
| offset += writeLength; |
| writeBuffer = NULL; |
| } |
| |
| // wait for read to complete |
| if (req) { |
| int read = mData.readDataWait(mDevice); |
| if (read < 0) |
| goto fail; |
| |
| if (read > 0) { |
| writeBuffer = req->buffer; |
| writeLength = read; |
| remaining -= read; |
| req = (req == mRequestIn1 ? mRequestIn2 : mRequestIn1); |
| } else { |
| writeBuffer = NULL; |
| } |
| } |
| } |
| |
| MtpResponseCode response = readResponse(); |
| if (response == MTP_RESPONSE_OK) |
| result = true; |
| } |
| |
| fail: |
| return result; |
| } |
| |
| |
| // reads the object's data and writes it to the specified file path |
| bool MtpDevice::readObject(MtpObjectHandle handle, const char* destPath, int group, int perm) { |
| LOGD("readObject: %s", destPath); |
| int fd = ::open(destPath, O_RDWR | O_CREAT | O_TRUNC); |
| if (fd < 0) { |
| LOGE("open failed for %s", destPath); |
| return false; |
| } |
| |
| fchown(fd, getuid(), group); |
| // set permissions |
| int mask = umask(0); |
| fchmod(fd, perm); |
| umask(mask); |
| |
| Mutex::Autolock autoLock(mMutex); |
| bool result = false; |
| |
| mRequest.reset(); |
| mRequest.setParameter(1, handle); |
| if (sendRequest(MTP_OPERATION_GET_OBJECT) |
| && mData.readDataHeader(mRequestIn1)) { |
| uint32_t length = mData.getContainerLength(); |
| if (length < MTP_CONTAINER_HEADER_SIZE) |
| goto fail; |
| length -= MTP_CONTAINER_HEADER_SIZE; |
| uint32_t remaining = length; |
| |
| int initialDataLength = 0; |
| void* initialData = mData.getData(initialDataLength); |
| if (initialData) { |
| if (initialDataLength > 0) { |
| if (write(fd, initialData, initialDataLength) != initialDataLength) |
| goto fail; |
| remaining -= initialDataLength; |
| } |
| free(initialData); |
| } |
| |
| // USB reads greater than 16K don't work |
| char buffer1[16384], buffer2[16384]; |
| mRequestIn1->buffer = buffer1; |
| mRequestIn2->buffer = buffer2; |
| struct usb_request* req = mRequestIn1; |
| void* writeBuffer = NULL; |
| int writeLength = 0; |
| |
| while (remaining > 0 || writeBuffer) { |
| if (remaining > 0) { |
| // queue up a read request |
| req->buffer_length = (remaining > sizeof(buffer1) ? sizeof(buffer1) : remaining); |
| if (mData.readDataAsync(req)) { |
| LOGE("readDataAsync failed"); |
| goto fail; |
| } |
| } else { |
| req = NULL; |
| } |
| |
| if (writeBuffer) { |
| // write previous buffer |
| if (write(fd, writeBuffer, writeLength) != writeLength) { |
| LOGE("write failed"); |
| // wait for pending read before failing |
| if (req) |
| mData.readDataWait(mDevice); |
| goto fail; |
| } |
| writeBuffer = NULL; |
| } |
| |
| // wait for read to complete |
| if (req) { |
| int read = mData.readDataWait(mDevice); |
| if (read < 0) |
| goto fail; |
| |
| if (read > 0) { |
| writeBuffer = req->buffer; |
| writeLength = read; |
| remaining -= read; |
| req = (req == mRequestIn1 ? mRequestIn2 : mRequestIn1); |
| } else { |
| writeBuffer = NULL; |
| } |
| } |
| } |
| |
| MtpResponseCode response = readResponse(); |
| if (response == MTP_RESPONSE_OK) |
| result = true; |
| } |
| |
| fail: |
| ::close(fd); |
| return result; |
| } |
| |
| bool MtpDevice::sendRequest(MtpOperationCode operation) { |
| LOGV("sendRequest: %s\n", MtpDebug::getOperationCodeName(operation)); |
| mReceivedResponse = false; |
| mRequest.setOperationCode(operation); |
| if (mTransactionID > 0) |
| mRequest.setTransactionID(mTransactionID++); |
| int ret = mRequest.write(mRequestOut); |
| mRequest.dump(); |
| return (ret > 0); |
| } |
| |
| bool MtpDevice::sendData() { |
| LOGV("sendData\n"); |
| mData.setOperationCode(mRequest.getOperationCode()); |
| mData.setTransactionID(mRequest.getTransactionID()); |
| int ret = mData.write(mRequestOut); |
| mData.dump(); |
| return (ret > 0); |
| } |
| |
| bool MtpDevice::readData() { |
| mData.reset(); |
| int ret = mData.read(mRequestIn1); |
| LOGV("readData returned %d\n", ret); |
| if (ret >= MTP_CONTAINER_HEADER_SIZE) { |
| if (mData.getContainerType() == MTP_CONTAINER_TYPE_RESPONSE) { |
| LOGD("got response packet instead of data packet"); |
| // we got a response packet rather than data |
| // copy it to mResponse |
| mResponse.copyFrom(mData); |
| mReceivedResponse = true; |
| return false; |
| } |
| mData.dump(); |
| return true; |
| } |
| else { |
| LOGV("readResponse failed\n"); |
| return false; |
| } |
| } |
| |
| bool MtpDevice::writeDataHeader(MtpOperationCode operation, int dataLength) { |
| mData.setOperationCode(operation); |
| mData.setTransactionID(mRequest.getTransactionID()); |
| return (!mData.writeDataHeader(mRequestOut, dataLength)); |
| } |
| |
| MtpResponseCode MtpDevice::readResponse() { |
| LOGV("readResponse\n"); |
| if (mReceivedResponse) { |
| mReceivedResponse = false; |
| return mResponse.getResponseCode(); |
| } |
| int ret = mResponse.read(mRequestIn1); |
| if (ret >= MTP_CONTAINER_HEADER_SIZE) { |
| mResponse.dump(); |
| return mResponse.getResponseCode(); |
| } else { |
| LOGD("readResponse failed\n"); |
| return -1; |
| } |
| } |
| |
| } // namespace android |