Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
0 1 Do not run _INI, examine device children
1 0 Run _INI, examine device children
1 1 Run _INI, examine device children
The _INI control method is generally used to switch devices out of a legacy operating mode. For
example, BIOSes often configure CardBus controllers in a legacy mode to support legacy operating
systems. Before enumerating the device with an ACPI operating system, the CardBus controllers
must be initialized to CardBus mode. For such systems, the vendor can include an _INI control
method under the CardBus controller to switch the device into CardBus mode.
In addition to device initialization, OSPM unconditionally evaluates an _INI object under the \_SB
namespace, if present, at the beginning of namespace initialization.
6.5.2 _DCK (Dock)
This control method is located in the device object that represents the docking station (that is, the
device object with all the _EJx control methods for the docking station). The presence of _DCK
indicates to the OS that the device is really a docking station.
_DCK also controls the isolation logic on the docking connector. This allows an OS to prepare for
docking before the bus is activated and devices appear on the bus.
Arguments: (1)
Arg0 – An Integer containing a docking action code
0 – Undock (isolate from connector)
1 – Dock (remove isolation from connector)
Return Value:
An Integer containing the docking status code
1 – Successful
0 – Failed
Note: When _DCK is called with 0, OSPM will ignore the return value. The _STA object that follows the
_EJx control method will notify whether or not the portable has been ejected.
6.5.3 _BDN (BIOS Dock Name)
_BDN is used to correlate a docking station reported via ACPI and the same docking station reported
via legacy interfaces. It is primarily used for upgrading over non-ACPI environments.
Arguments:
None
Return Value:
An Integer that contains the EISA Dock ID
_BDN must appear under a device object that represents the dock, that is, the device object with
_Ejx methods. This object must return a DWORD that is the EISA-packed DockID returned by the
Plug and Play BIOS Function 5 (Get Docking Station Identifier) for a dock.
382 April, 2015 Version 6.0