Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
cc
– hexadecimal representation of the Class Code byte
ss
– hexadecimal representation of the Subclass Code byte
pp
– hexadecimal representation of the Programming Interface byte
vvvv
– hexadecimal representation of the Vendor ID
dddd
– hexadecimal representation of the Device ID
ssssssss
– hexadecimal representation of the Subsystem ID
rr
– hexadecimal representation of the Revision byte
A compatible ID retrieved from a _CID object is only meaningful if it is a non-NULL value.
Example ASL:
Device (XYZ) {
Name (_HID, EISAID ("PNP0303"))
Name (_CID, EISAID ("PNP030B"))
}
// PC Keyboard Controller
6.1.3 _CLS (Class Code)
This object is used to supply OSPM with the PCI-defined base-class, sub-class and programming
interface for a device. This object is optional. However, it may be useful for loading generic drivers
on hardware that is compatible with PCI -defined device classes, but that is not implemented on the
PCI bus (and is therefore enumerated by ACPI.)
Arguments:
None
Return Value:
A Package containing the PCI -defined class information as a list of Integers:
Package(3) {, , }
A list of available class codes and programming interface codes is provided by the PCI SIG. See
"PCI Code and ID Assignment Specification", available from "Links to ACPI-Related Documents"
(http://uefi.org/acpi) under the heading "PCI Code and ID Assignment Specification
Example ASL:
280 April, 2015 Version 6.0