smbusdevice.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 135 行

package org.jnode.driver.smbus;

import org.jnode.driver.Device;

/**
 * SMBus device extension.
 * 
 * <p>
 * Title:
 * </p>
 * <p>
 * Description:
 * </p>
 * <p>
 * Licence: GNU LGPL
 * </p>
 * <p>
 * </p>
 * 
 * @author Francois-Frederic Ozog
 * @version 1.0
 */

public class SMBusDevice extends Device {

	int address;

	/**
	 * 8 bits value bits assignment 7-6 AddressType 5-1 reserved 0 PEC supported
	 */
	int capabilities; // 8 bits
	public static final int ADDRESS_FIXED_ADDRESS = 0; // bit [7-6] 00 Fixed Address devices are
													   // identified first.
	public static final int ADDRESS_DYNAMIC_PERSISTENT = 1; // bit [7-6] 01 Dynamic and Persistent
															// Address devices are identified next.
	public static final int ADDRESS_DYNAMIC_VOLATILE = 2; // bit [7-6] 10 Dynamic and Volatile
														  // Address devices are identified next.
	public static final int ADDRESS_RANDOM = 3; // bit [7-6] 11 Dynamic and Volatile Address
												// devices are identified next.

	/**
	 * 8 bits bits assignment 7-6 reserved 5-3 version (001 for SMBus 2.0) 2-0 silicon version
	 */
	int version; // 8 bits
	public static final int VERSION_MASK = 0x38;
	public static final int VERSION_V10 = 0;
	public static final int VERSION_V11 = 0;
	public static final int VERSION_V20 = 1;

	int vendorid; // 16 bits
	int deviceid; // 16 bits

	/**
	 * 16 bits bits assignment 15-4 supported protocols bit 15 Reserved for future definition under
	 * the SMBus specifications. bit 14 Reserved for future definition under the SMBus
	 * specifications. bit 13 Reserved for future definition under the SMBus specifications. bit 12
	 * Reserved for future definition under the SMBus specifications. bit 11 Reserved for future
	 * definition under the SMBus specifications. bit 10 Reserved for future definition under the
	 * SMBus specifications. bit 9 Reserved for future definition under the SMBus specifications.
	 * bit 8 Reserved for future definition under the SMBus specifications. bit 7 Reserved for
	 * future definition under the SMBus specifications. bit 6 IPMI Device supports additional
	 * interface access and capabilities per IPMI specifications bit 5 ASF Device supports
	 * additional interface access and capabilities per ASF specifications bit 4 OEM Device
	 * supports vendor-specific access and capabilities per the Subsystem Vendor ID and Subsystem
	 * Device ID fields returned by discoverable SMBus devices. The Subsystem Vendor ID identifies
	 * the vendor or defining body that has specified the behavior of the device. The Subsystem
	 * Device ID is used in conjunction with the System Vendor ID to specify a particular level of
	 * functional equivalence for the device. 3-0 SMBus version
	 */
	int interfaceid; // 16 bits
	public static final int VERSION_1_0 = 0; // 0000 do not use in ARP tables
	public static final int VERSION_1_1 = 1; // 0001 do not use in ARP tables
	public static final int VERSION_2_0 = 4; // 0100 (0010 and 0011 are reserved)

	int subsystemvendorid; // 16 bits
	int subsystemdeviceid; // 16 bits
	int vendorspecificid; // 16 bits

	public SMBusDevice(SMBus bus, String name, int version, int vendorid, int deviceid, int interfaceid, int subsystemvendorid, int subsystemdeviceid, int vendorspecificid) {
		super(bus, name);
		this.version = version;
		this.vendorid = vendorid;
		this.deviceid = deviceid;
		this.interfaceid = interfaceid;
		this.subsystemvendorid = subsystemvendorid;
		this.subsystemdeviceid = subsystemdeviceid;
		this.vendorspecificid = vendorspecificid;
	}

	public SMBusDevice(SMBus bus, String name, int version) {
		this(bus, name, version, 0, 0, 0, 0, 0, 0);
	}

	public int getAddressType() {
		if (getVersion() < VERSION_V20)
			return -1;
		return capabilities & 0xc0 >> 6;
	}

	public boolean isPECSupported() {
		if (getVersion() < VERSION_V20)
			return false;
		return (capabilities & 0x01) > 0;
	}

	public int getVersion() {
		int version = ((this.version & VERSION_MASK) >> 3) & 0xff;
		return version;
	}

	public int getSiliconVersion() {
		if (getVersion() < VERSION_V20)
			return -1;
		return version & 0x7;
	}

	public boolean isIPMIInterface() {
		if (getVersion() < VERSION_V20)
			return false;
		return (interfaceid & 0x40) > 0;
	}

	public boolean isASFInterface() {
		if (getVersion() < VERSION_V20)
			return false;
		return (interfaceid & 0x20) > 0;
	}

	public boolean isOEMInterface() {
		if (getVersion() < VERSION_V20)
			return false;
		return (interfaceid & 0x10) > 0;
	}

}