services/core/jni/com_android_server_UsbHostManager.cpp - platform/frameworks/base - Git at Google

 /*
  * 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 <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_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);
     char *product = usb_device_get_product_name(device);
     char *serial = usb_device_get_serial(device);

     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, 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);
             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);
             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 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;Ljava/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));
 }

 };
	/*
	* 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 <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_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);
	char *product = usb_device_get_product_name(device);
	char *serial = usb_device_get_serial(device);

	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, 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);
	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);
	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 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;Ljava/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));
	}

	};