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/*
* 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.
*/
package android.hardware.usb;
import android.service.ServiceProtoEnums;
/**
* Contains constants for the USB protocol.
* These constants correspond to definitions in linux/usb/ch9.h in the linux kernel.
*/
public final class UsbConstants {
/**
* Bitmask used for extracting the {@link UsbEndpoint} direction from its address field.
* @see UsbEndpoint#getAddress
* @see UsbEndpoint#getDirection
* @see #USB_DIR_OUT
* @see #USB_DIR_IN
*
*/
public static final int USB_ENDPOINT_DIR_MASK = 0x80;
/**
* Used to signify direction of data for a {@link UsbEndpoint} is OUT (host to device)
* @see UsbEndpoint#getDirection
*/
public static final int USB_DIR_OUT = ServiceProtoEnums.USB_ENDPOINT_DIR_OUT; // 0
/**
* Used to signify direction of data for a {@link UsbEndpoint} is IN (device to host)
* @see UsbEndpoint#getDirection
*/
public static final int USB_DIR_IN = ServiceProtoEnums.USB_ENDPOINT_DIR_IN; // 0x80
/**
* Bitmask used for extracting the {@link UsbEndpoint} number its address field.
* @see UsbEndpoint#getAddress
* @see UsbEndpoint#getEndpointNumber
*/
public static final int USB_ENDPOINT_NUMBER_MASK = 0x0f;
/**
* Bitmask used for extracting the {@link UsbEndpoint} type from its address field.
* @see UsbEndpoint#getAddress
* @see UsbEndpoint#getType
* @see #USB_ENDPOINT_XFER_CONTROL
* @see #USB_ENDPOINT_XFER_ISOC
* @see #USB_ENDPOINT_XFER_BULK
* @see #USB_ENDPOINT_XFER_INT
*/
public static final int USB_ENDPOINT_XFERTYPE_MASK = 0x03;
/**
* Control endpoint type (endpoint zero)
* @see UsbEndpoint#getType
*/
public static final int USB_ENDPOINT_XFER_CONTROL =
ServiceProtoEnums.USB_ENDPOINT_TYPE_XFER_CONTROL; // 0
/**
* Isochronous endpoint type (currently not supported)
* @see UsbEndpoint#getType
*/
public static final int USB_ENDPOINT_XFER_ISOC =
ServiceProtoEnums.USB_ENDPOINT_TYPE_XFER_ISOC; // 1
/**
* Bulk endpoint type
* @see UsbEndpoint#getType
*/
public static final int USB_ENDPOINT_XFER_BULK =
ServiceProtoEnums.USB_ENDPOINT_TYPE_XFER_BULK; // 2
/**
* Interrupt endpoint type
* @see UsbEndpoint#getType
*/
public static final int USB_ENDPOINT_XFER_INT =
ServiceProtoEnums.USB_ENDPOINT_TYPE_XFER_INT; // 3
/**
* Bitmask used for encoding the request type for a control request on endpoint zero.
*/
public static final int USB_TYPE_MASK = (0x03 << 5);
/**
* Used to specify that an endpoint zero control request is a standard request.
*/
public static final int USB_TYPE_STANDARD = (0x00 << 5);
/**
* Used to specify that an endpoint zero control request is a class specific request.
*/
public static final int USB_TYPE_CLASS = (0x01 << 5);
/**
* Used to specify that an endpoint zero control request is a vendor specific request.
*/
public static final int USB_TYPE_VENDOR = (0x02 << 5);
/**
* Reserved endpoint zero control request type (currently unused).
*/
public static final int USB_TYPE_RESERVED = (0x03 << 5);
/**
* USB class indicating that the class is determined on a per-interface basis.
*/
public static final int USB_CLASS_PER_INTERFACE = 0;
/**
* USB class for audio devices.
*/
public static final int USB_CLASS_AUDIO = 1;
/**
* USB class for communication devices.
*/
public static final int USB_CLASS_COMM = 2;
/**
* USB class for human interface devices (for example, mice and keyboards).
*/
public static final int USB_CLASS_HID = 3;
/**
* USB class for physical devices.
*/
public static final int USB_CLASS_PHYSICA = 5;
/**
* USB class for still image devices (digital cameras).
*/
public static final int USB_CLASS_STILL_IMAGE = 6;
/**
* USB class for printers.
*/
public static final int USB_CLASS_PRINTER = 7;
/**
* USB class for mass storage devices.
*/
public static final int USB_CLASS_MASS_STORAGE = 8;
/**
* USB class for USB hubs.
*/
public static final int USB_CLASS_HUB = 9;
/**
* USB class for CDC devices (communications device class).
*/
public static final int USB_CLASS_CDC_DATA = 0x0a;
/**
* USB class for content smart card devices.
*/
public static final int USB_CLASS_CSCID = 0x0b;
/**
* USB class for content security devices.
*/
public static final int USB_CLASS_CONTENT_SEC = 0x0d;
/**
* USB class for video devices.
*/
public static final int USB_CLASS_VIDEO = 0x0e;
/**
* USB class for wireless controller devices.
*/
public static final int USB_CLASS_WIRELESS_CONTROLLER = 0xe0;
/**
* USB class for wireless miscellaneous devices.
*/
public static final int USB_CLASS_MISC = 0xef;
/**
* Application specific USB class.
*/
public static final int USB_CLASS_APP_SPEC = 0xfe;
/**
* Vendor specific USB class.
*/
public static final int USB_CLASS_VENDOR_SPEC = 0xff;
/**
* Boot subclass for HID devices.
*/
public static final int USB_INTERFACE_SUBCLASS_BOOT = 1;
/**
* Vendor specific USB subclass.
*/
public static final int USB_SUBCLASS_VENDOR_SPEC = 0xff;
}
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