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Clean up BaseSerialPortLib16550 to remove references and checks for Carrier Detect(CD). This is not required for this library implementation. The only signals used for Hardware Flow Control are RTS/CTS. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11300 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
mdkinney 2011-02-04 01:19:59 +00:00
parent b739d70ee5
commit db662a64a6
1 changed files with 6 additions and 7 deletions
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13
MdeModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c
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@ -1,7 +1,7 @@
/** @file /** @file
16550 UART Serial Port library functions 16550 UART Serial Port library functions
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at which accompanies this distribution. The full text of the license may be found at
@ -38,7 +38,6 @@
#define B_UART_LSR_TEMT BIT6 #define B_UART_LSR_TEMT BIT6
#define R_UART_MSR 6 #define R_UART_MSR 6
#define B_UART_MSR_CTS BIT4 #define B_UART_MSR_CTS BIT4
#define B_UART_MSR_DCD BIT7
/** /**
Read an 8-bit 16550 register. If PcdSerialUseMmio is TRUE, then the value is read from Read an 8-bit 16550 register. If PcdSerialUseMmio is TRUE, then the value is read from
@ -194,9 +193,9 @@ SerialPortWrite (
IN UINTN NumberOfBytes IN UINTN NumberOfBytes
) )
{ {
UINTN Result; UINTN Result;
UINTN Index; UINTN Index;
UINTN FifoSize; UINTN FifoSize;
if (Buffer == NULL) { if (Buffer == NULL) {
return 0; return 0;
@ -213,7 +212,7 @@ SerialPortWrite (
FifoSize = 64; FifoSize = 64;
} }
} }
Result = NumberOfBytes; Result = NumberOfBytes;
while (NumberOfBytes != 0) { while (NumberOfBytes != 0) {
// //
@ -230,7 +229,7 @@ SerialPortWrite (
// //
// Wait for notification from peer to send data // Wait for notification from peer to send data
// //
while ((SerialPortReadRegister (R_UART_MSR) & (B_UART_MSR_CTS | B_UART_MSR_DCD)) == B_UART_MSR_DCD); while ((SerialPortReadRegister (R_UART_MSR) & (B_UART_MSR_CTS)) == 0);
} }
// //