diff options
Diffstat (limited to 'services/core/jni/com_android_server_UsbHostManager.cpp')
-rw-r--r-- | services/core/jni/com_android_server_UsbHostManager.cpp | 204 |
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)); +} + +}; |