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EmbeddedPkg: Clarify the declaration of SerialPortSetControl()

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Rework of PL011UartSetControl() as a consequence as well as update of
function header comment blocks.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Reviewed-By: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16251 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ronald Cron
2014-10-27 15:37:37 +00:00
committed by oliviermartin
parent 5f81a62094
commit ab71619108
4 changed files with 114 additions and 40 deletions
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30
ArmPlatformPkg/Library/PL011SerialPortLib/PL011SerialPortExtLib.c
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@@ -1,7 +1,7 @@
/** @file
Serial I/O Port library functions with no library constructor/destructor
Copyright (c) 2012-2013, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2012-2014, ARM Ltd. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -65,19 +65,35 @@ SerialPortSetAttributes (
}
/**
Set the serial device control bits.
@param Control Control bits which are to be set on the serial device.
Assert or deassert the control signals on a serial port.
The following control signals are set according their bit settings :
. Request to Send
. Data Terminal Ready
@retval EFI_SUCCESS The new control bits were set on the serial device.
@retval EFI_UNSUPPORTED The serial device does not support this operation.
@retval EFI_DEVICE_ERROR The serial device is not functioning correctly.
@param[in] Control The following bits are taken into account :
. EFI_SERIAL_REQUEST_TO_SEND : assert/deassert the
"Request To Send" control signal if this bit is
equal to one/zero.
. EFI_SERIAL_DATA_TERMINAL_READY : assert/deassert
the "Data Terminal Ready" control signal if this
bit is equal to one/zero.
. EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE : enable/disable
the hardware loopback if this bit is equal to
one/zero.
. EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE : not supported.
. EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE : enable/
disable the hardware flow control based on CTS (Clear
To Send) and RTS (Ready To Send) control signals.
@retval RETURN_SUCCESS The new control bits were set on the serial device.
@retval RETURN_UNSUPPORTED The serial device does not support this operation.
**/
RETURN_STATUS
EFIAPI
SerialPortSetControl (
IN UINT32 Control
IN UINT32 Control
)
{
return PL011UartSetControl ((UINTN)PcdGet64 (PcdSerialRegisterBase), Control);