1 files changed, 204 insertions, 0 deletions
diff --git a/services/core/jni/com_android_server_UsbHostManager.cpp b/services/core/jni/com_android_server_UsbHostManager.cpp
new file mode 100644
index 0000000..639790b
--- /dev/null
+++ b/services/core/jni/com_android_server_UsbHostManager.cpp
@@ -0,0 +1,204 @@
+/*
+ * 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 "UsbHostManagerJNI"
+#include "utils/Log.h"
+
+#include "jni.h"
+#include "JNIHelp.h"
+#include "android_runtime/AndroidRuntime.h"
+#include "android_runtime/Log.h"
+#include "utils/Vector.h"
+
+#include <usbhost/usbhost.h>
+
+#include <stdio.h>
+#include <asm/byteorder.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+namespace android
+{
+
+static struct parcel_file_descriptor_offsets_t
+{
+    jclass mClass;
+    jmethodID mConstructor;
+} gParcelFileDescriptorOffsets;
+
+static jmethodID method_usbDeviceAdded;
+static jmethodID method_usbDeviceRemoved;
+
+static void checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
+    if (env->ExceptionCheck()) {
+        ALOGE("An exception was thrown by callback '%s'.", methodName);
+        LOGE_EX(env);
+        env->ExceptionClear();
+    }
+}
+
+static int usb_device_added(const char *devname, void* client_data) {
+    struct usb_descriptor_header* desc;
+    struct usb_descriptor_iter iter;
+
+    struct usb_device *device = usb_device_open(devname);
+    if (!device) {
+        ALOGE("usb_device_open failed\n");
+        return 0;
+    }
+
+    JNIEnv* env = AndroidRuntime::getJNIEnv();
+    jobject thiz = (jobject)client_data;
+    Vector<int> interfaceValues;
+    Vector<int> endpointValues;
+    const usb_device_descriptor* deviceDesc = usb_device_get_device_descriptor(device);
+
+    uint16_t vendorId = usb_device_get_vendor_id(device);
+    uint16_t productId = usb_device_get_product_id(device);
+    uint8_t deviceClass = deviceDesc->bDeviceClass;
+    uint8_t deviceSubClass = deviceDesc->bDeviceSubClass;
+    uint8_t protocol = deviceDesc->bDeviceProtocol;
+
+    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;
+
+            // push class, subclass, protocol and number of endpoints into interfaceValues vector
+            interfaceValues.add(interface->bInterfaceNumber);
+            interfaceValues.add(interface->bInterfaceClass);
+            interfaceValues.add(interface->bInterfaceSubClass);
+            interfaceValues.add(interface->bInterfaceProtocol);
+            interfaceValues.add(interface->bNumEndpoints);
+        } else if (desc->bDescriptorType == USB_DT_ENDPOINT) {
+            struct usb_endpoint_descriptor *endpoint = (struct usb_endpoint_descriptor *)desc;
+
+            // push address, attributes, max packet size and interval into endpointValues vector
+            endpointValues.add(endpoint->bEndpointAddress);
+            endpointValues.add(endpoint->bmAttributes);
+            endpointValues.add(__le16_to_cpu(endpoint->wMaxPacketSize));
+            endpointValues.add(endpoint->bInterval);
+        }
+    }
+
+    usb_device_close(device);
+
+    // handle generic device notification
+    int length = interfaceValues.size();
+    jintArray interfaceArray = env->NewIntArray(length);
+    env->SetIntArrayRegion(interfaceArray, 0, length, interfaceValues.array());
+
+    length = endpointValues.size();
+    jintArray endpointArray = env->NewIntArray(length);
+    env->SetIntArrayRegion(endpointArray, 0, length, endpointValues.array());
+
+    jstring deviceName = env->NewStringUTF(devname);
+    env->CallVoidMethod(thiz, method_usbDeviceAdded,
+            deviceName, vendorId, productId, deviceClass,
+            deviceSubClass, protocol, interfaceArray, endpointArray);
+
+    env->DeleteLocalRef(interfaceArray);
+    env->DeleteLocalRef(endpointArray);
+    env->DeleteLocalRef(deviceName);
+    checkAndClearExceptionFromCallback(env, __FUNCTION__);
+
+    return 0;
+}
+
+static int usb_device_removed(const char *devname, void* client_data) {
+    JNIEnv* env = AndroidRuntime::getJNIEnv();
+    jobject thiz = (jobject)client_data;
+
+    jstring deviceName = env->NewStringUTF(devname);
+    env->CallVoidMethod(thiz, method_usbDeviceRemoved, deviceName);
+    env->DeleteLocalRef(deviceName);
+    checkAndClearExceptionFromCallback(env, __FUNCTION__);
+    return 0;
+}
+
+static void android_server_UsbHostManager_monitorUsbHostBus(JNIEnv *env, jobject thiz)
+{
+    struct usb_host_context* context = usb_host_init();
+    if (!context) {
+        ALOGE("usb_host_init failed");
+        return;
+    }
+    // this will never return so it is safe to pass thiz directly
+    usb_host_run(context, usb_device_added, usb_device_removed, NULL, (void *)thiz);
+}
+
+static jobject android_server_UsbHostManager_openDevice(JNIEnv *env, jobject thiz, jstring deviceName)
+{
+    const char *deviceNameStr = env->GetStringUTFChars(deviceName, NULL);
+    struct usb_device* device = usb_device_open(deviceNameStr);
+    env->ReleaseStringUTFChars(deviceName, deviceNameStr);
+
+    if (!device)
+        return NULL;
+
+    int fd = usb_device_get_fd(device);
+    if (fd < 0)
+        return NULL;
+    int newFD = dup(fd);
+    usb_device_close(device);
+
+    jobject fileDescriptor = jniCreateFileDescriptor(env, newFD);
+    if (fileDescriptor == NULL) {
+        return NULL;
+    }
+    return env->NewObject(gParcelFileDescriptorOffsets.mClass,
+        gParcelFileDescriptorOffsets.mConstructor, fileDescriptor);
+}
+
+static JNINativeMethod method_table[] = {
+    { "monitorUsbHostBus", "()V", (void*)android_server_UsbHostManager_monitorUsbHostBus },
+    { "nativeOpenDevice",  "(Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;",
+                                  (void*)android_server_UsbHostManager_openDevice },
+};
+
+int register_android_server_UsbHostManager(JNIEnv *env)
+{
+    jclass clazz = env->FindClass("com/android/server/usb/UsbHostManager");
+    if (clazz == NULL) {
+        ALOGE("Can't find com/android/server/usb/UsbHostManager");
+        return -1;
+    }
+    method_usbDeviceAdded = env->GetMethodID(clazz, "usbDeviceAdded", "(Ljava/lang/String;IIIII[I[I)V");
+    if (method_usbDeviceAdded == NULL) {
+        ALOGE("Can't find usbDeviceAdded");
+        return -1;
+    }
+    method_usbDeviceRemoved = env->GetMethodID(clazz, "usbDeviceRemoved", "(Ljava/lang/String;)V");
+    if (method_usbDeviceRemoved == NULL) {
+        ALOGE("Can't find usbDeviceRemoved");
+        return -1;
+    }
+
+    clazz = env->FindClass("android/os/ParcelFileDescriptor");
+    LOG_FATAL_IF(clazz == NULL, "Unable to find class android.os.ParcelFileDescriptor");
+    gParcelFileDescriptorOffsets.mClass = (jclass) env->NewGlobalRef(clazz);
+    gParcelFileDescriptorOffsets.mConstructor = env->GetMethodID(clazz, "<init>", "(Ljava/io/FileDescriptor;)V");
+    LOG_FATAL_IF(gParcelFileDescriptorOffsets.mConstructor == NULL,
+                 "Unable to find constructor for android.os.ParcelFileDescriptor");
+
+    return jniRegisterNativeMethods(env, "com/android/server/usb/UsbHostManager",
+            method_table, NELEM(method_table));
+}
+
+};