Prototype Content Provider support for MTP/PTP devices.

At this point much of the plumbing is in place, but only a few simple queries
are supported.
This is enough to support a proof of concept sample program that navigates
the file hierarchy of a digital camera connected via USB.

Also removed obsolete ptptest host test program.

Change-Id: I17644344b9f0ce1ecc302bc0478c1f3d44a1647f
Signed-off-by: Mike Lockwood <lockwood@android.com>

1 files changed, 230 insertions, 0 deletions

diff --git a/media/mtp/MtpDevice.cpp b/media/mtp/MtpDevice.cpp
new file mode 100644
index 0000000..0282086
--- /dev/null
+++ b/media/mtp/MtpDevice.cpp
@@ -0,0 +1,230 @@
+/*
+ * 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.
+ */
+
+#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 <usbhost/usbhost.h>
+
+#include "MtpDevice.h"
+#include "MtpDebug.h"
+#include "MtpDeviceInfo.h"
+#include "MtpObjectInfo.h"
+#include "MtpStorageInfo.h"
+#include "MtpStringBuffer.h"
+
+namespace android {
+
+MtpDevice::MtpDevice(struct usb_device* device, int interface,
+            struct usb_endpoint *ep_in, struct usb_endpoint *ep_out,
+            struct usb_endpoint *ep_intr)
+    :   mDevice(device),
+        mInterface(interface),
+        mEndpointIn(ep_in),
+        mEndpointOut(ep_out),
+        mEndpointIntr(ep_intr),
+        mDeviceInfo(NULL),
+        mID(usb_device_get_unique_id(device)),
+        mSessionID(0),
+        mTransactionID(0)
+{
+}
+
+MtpDevice::~MtpDevice() {
+    close();
+}
+
+void MtpDevice::initialize() {
+    openSession();
+    mDeviceInfo = getDeviceInfo();
+    if (mDeviceInfo) {
+        mDeviceInfo->print();
+    }
+}
+
+void MtpDevice::close() {
+    if (mDevice) {
+        usb_device_release_interface(mDevice, mInterface);
+        usb_device_close(mDevice);
+        mDevice = NULL;
+    }
+}
+
+const char* MtpDevice::getDeviceName() {
+    if (mDevice)
+        return usb_device_get_name(mDevice);
+    else
+        return "???";
+}
+
+bool MtpDevice::openSession() {
+printf("openSession\n");
+    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() {
+    mRequest.reset();
+    if (!sendRequest(MTP_OPERATION_GET_DEVICE_INFO))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+printf("getDeviceInfo returned %04X\n", ret);
+    if (ret == MTP_RESPONSE_OK) {
+        MtpDeviceInfo* info = new MtpDeviceInfo;
+        info->read(mData);
+        return info;
+    }
+    return NULL;
+}
+
+MtpStorageIDList* MtpDevice::getStorageIDs() {
+    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) {
+    mRequest.reset();
+    mRequest.setParameter(1, storageID);
+    if (!sendRequest(MTP_OPERATION_GET_STORAGE_INFO))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+printf("getStorageInfo returned %04X\n", ret);
+    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) {
+    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();
+printf("getObjectHandles returned %04X\n", ret);
+    if (ret == MTP_RESPONSE_OK) {
+        return mData.getAUInt32();
+    }
+    return NULL;
+}
+
+MtpObjectInfo* MtpDevice::getObjectInfo(MtpObjectHandle handle) {
+    mRequest.reset();
+    mRequest.setParameter(1, handle);
+    if (!sendRequest(MTP_OPERATION_GET_OBJECT_INFO))
+        return NULL;
+    if (!readData())
+        return NULL;
+    MtpResponseCode ret = readResponse();
+printf("getObjectInfo returned %04X\n", ret);
+    if (ret == MTP_RESPONSE_OK) {
+        MtpObjectInfo* info = new MtpObjectInfo(handle);
+        info->read(mData);
+        return info;
+    }
+    return NULL;
+}
+
+bool MtpDevice::sendRequest(MtpOperationCode operation) {
+    printf("sendRequest: %s\n", MtpDebug::getOperationCodeName(operation));
+    mRequest.setOperationCode(operation);
+    if (mTransactionID > 0)
+        mRequest.setTransactionID(mTransactionID++);
+    int ret = mRequest.write(mEndpointOut);
+    mRequest.dump();
+    return (ret > 0);
+}
+
+bool MtpDevice::sendData(MtpOperationCode operation) {
+    printf("sendData\n");
+    mData.setOperationCode(mRequest.getOperationCode());
+    mData.setTransactionID(mRequest.getTransactionID());
+    int ret = mData.write(mEndpointOut);
+    mData.dump();
+    return (ret > 0);
+}
+
+bool MtpDevice::readData() {
+    mData.reset();
+    int ret = mData.read(mEndpointIn);
+    printf("readData returned %d\n", ret);
+    if (ret >= MTP_CONTAINER_HEADER_SIZE) {
+        mData.dump();
+        return true;
+    }
+    else {
+        printf("readResponse failed\n");
+        return false;
+    }
+}
+
+MtpResponseCode MtpDevice::readResponse() {
+    printf("readResponse\n");
+    int ret = mResponse.read(mEndpointIn);
+    if (ret >= MTP_CONTAINER_HEADER_SIZE) {
+        mResponse.dump();
+        return mResponse.getResponseCode();
+    }
+    else {
+        printf("readResponse failed\n");
+        return -1;
+    }
+}
+
+}  // namespace android