UART_INITIALIZE_PORT callback function

Description

Initializes or resets the UART hardware. This callback function is called before calling any other driver functions.

Parameters

LoadOptions

[_In_opt_Optional _Null_terminated_] A null-terminated load option string.

Port [_Inout_]

A pointer to a _CPPORT structure that is filled with information about port initialization.

MemoryMapped

A boolean value that indicates whether the UART hardware is accessed through memory-mapped registers or legacy port I/O.

AccessSize

An ACPI Generic Access Size value that indicates the type of bus access that should be performed when accessing the UART hardware.

BitWidth

A number that indicates the width of the UART registers.

Return value

Returns TRUE if the port has been successfully initialized, FALSE otherwise.

Prototype

//Declaration

UART_INITIALIZE_PORT UartInitializePort;

// Definition

BOOLEAN UartInitializePort
(
    PCHAR LoadOptions
    PCPPORT Port
    BOOLEAN MemoryMapped
    UCHAR AccessSize
    UCHAR BitWidth
)
{...}

Remarks

Register your implementation of this callback function by setting the appropriate member of UART_HARDWARE_DRIVER.

See also

UART_HARDWARE_DRIVER

_CPPORT

uart.h