| /* |
| * 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 <nativehelper/JNIHelp.h> |
| #include "android_runtime/AndroidRuntime.h" |
| #include "android_runtime/Log.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 const int USB_CONTROL_TRANSFER_TIMEOUT_MS = 200; |
| |
| static struct parcel_file_descriptor_offsets_t |
| { |
| jclass mClass; |
| jmethodID mConstructor; |
| } gParcelFileDescriptorOffsets; |
| |
| static jmethodID method_beginUsbDeviceAdded; |
| static jmethodID method_addUsbConfiguration; |
| static jmethodID method_addUsbInterface; |
| static jmethodID method_addUsbEndpoint; |
| static jmethodID method_endUsbDeviceAdded; |
| 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; |
| const usb_device_descriptor* deviceDesc = usb_device_get_device_descriptor(device); |
| |
| char *manufacturer = usb_device_get_manufacturer_name(device, |
| USB_CONTROL_TRANSFER_TIMEOUT_MS); |
| char *product = usb_device_get_product_name(device, |
| USB_CONTROL_TRANSFER_TIMEOUT_MS); |
| int version = usb_device_get_version(device); |
| char *serial = usb_device_get_serial(device, |
| USB_CONTROL_TRANSFER_TIMEOUT_MS); |
| |
| jstring deviceName = env->NewStringUTF(devname); |
| jstring manufacturerName = AndroidRuntime::NewStringLatin1(env, manufacturer); |
| jstring productName = AndroidRuntime::NewStringLatin1(env, product); |
| jstring serialNumber = AndroidRuntime::NewStringLatin1(env, serial); |
| |
| jboolean result = env->CallBooleanMethod(thiz, method_beginUsbDeviceAdded, |
| deviceName, usb_device_get_vendor_id(device), usb_device_get_product_id(device), |
| deviceDesc->bDeviceClass, deviceDesc->bDeviceSubClass, deviceDesc->bDeviceProtocol, |
| manufacturerName, productName, version, serialNumber); |
| |
| env->DeleteLocalRef(serialNumber); |
| env->DeleteLocalRef(productName); |
| env->DeleteLocalRef(manufacturerName); |
| env->DeleteLocalRef(deviceName); |
| free(manufacturer); |
| free(product); |
| free(serial); |
| |
| if (!result) goto fail; |
| |
| usb_descriptor_iter_init(device, &iter); |
| |
| while ((desc = usb_descriptor_iter_next(&iter)) != NULL) { |
| if (desc->bDescriptorType == USB_DT_CONFIG) { |
| struct usb_config_descriptor *config = (struct usb_config_descriptor *)desc; |
| char *name = usb_device_get_string(device, config->iConfiguration, |
| USB_CONTROL_TRANSFER_TIMEOUT_MS); |
| jstring configName = AndroidRuntime::NewStringLatin1(env, name); |
| |
| env->CallVoidMethod(thiz, method_addUsbConfiguration, |
| config->bConfigurationValue, configName, config->bmAttributes, |
| config->bMaxPower); |
| |
| env->DeleteLocalRef(configName); |
| free(name); |
| } else if (desc->bDescriptorType == USB_DT_INTERFACE) { |
| struct usb_interface_descriptor *interface = (struct usb_interface_descriptor *)desc; |
| char *name = usb_device_get_string(device, interface->iInterface, |
| USB_CONTROL_TRANSFER_TIMEOUT_MS); |
| jstring interfaceName = AndroidRuntime::NewStringLatin1(env, name); |
| |
| env->CallVoidMethod(thiz, method_addUsbInterface, |
| interface->bInterfaceNumber, interfaceName, interface->bAlternateSetting, |
| interface->bInterfaceClass, interface->bInterfaceSubClass, |
| interface->bInterfaceProtocol); |
| |
| env->DeleteLocalRef(interfaceName); |
| free(name); |
| } else if (desc->bDescriptorType == USB_DT_ENDPOINT) { |
| struct usb_endpoint_descriptor *endpoint = (struct usb_endpoint_descriptor *)desc; |
| |
| env->CallVoidMethod(thiz, method_addUsbEndpoint, |
| endpoint->bEndpointAddress, endpoint->bmAttributes, |
| __le16_to_cpu(endpoint->wMaxPacketSize), endpoint->bInterval); |
| } |
| } |
| |
| env->CallVoidMethod(thiz, method_endUsbDeviceAdded); |
| |
| fail: |
| usb_device_close(device); |
| 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) { |
| usb_device_close(device); |
| 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 const 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_beginUsbDeviceAdded = env->GetMethodID(clazz, "beginUsbDeviceAdded", |
| "(Ljava/lang/String;IIIIILjava/lang/String;Ljava/lang/String;ILjava/lang/String;)Z"); |
| if (method_beginUsbDeviceAdded == NULL) { |
| ALOGE("Can't find beginUsbDeviceAdded"); |
| return -1; |
| } |
| method_addUsbConfiguration = env->GetMethodID(clazz, "addUsbConfiguration", |
| "(ILjava/lang/String;II)V"); |
| if (method_addUsbConfiguration == NULL) { |
| ALOGE("Can't find addUsbConfiguration"); |
| return -1; |
| } |
| method_addUsbInterface = env->GetMethodID(clazz, "addUsbInterface", |
| "(ILjava/lang/String;IIII)V"); |
| if (method_addUsbInterface == NULL) { |
| ALOGE("Can't find addUsbInterface"); |
| return -1; |
| } |
| method_addUsbEndpoint = env->GetMethodID(clazz, "addUsbEndpoint", "(IIII)V"); |
| if (method_addUsbEndpoint == NULL) { |
| ALOGE("Can't find addUsbEndpoint"); |
| return -1; |
| } |
| method_endUsbDeviceAdded = env->GetMethodID(clazz, "endUsbDeviceAdded", "()V"); |
| if (method_endUsbDeviceAdded == NULL) { |
| ALOGE("Can't find endUsbDeviceAdded"); |
| 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)); |
| } |
| |
| }; |