diff options
Diffstat (limited to 'CorebootModulePkg')
| -rw-r--r-- | CorebootModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/CorebootModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c b/CorebootModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c index 45056363c3..ca6db2306a 100644 --- a/CorebootModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c +++ b/CorebootModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.c @@ -554,9 +554,10 @@ SerialPortInitialize ( SerialPortWriteRegister (SerialRegisterBase, R_UART_FCR, (UINT8)(PcdGet8 (PcdSerialFifoControl) & (B_UART_FCR_FIFOE | B_UART_FCR_FIFO64))); // - // Put Modem Control Register(MCR) into its reset state of 0x00. + // Set RTS and DTR in Modem Control Register(MCR) // - SerialPortWriteRegister (SerialRegisterBase, R_UART_MCR, 0x00); + SerialPortWriteRegister (SerialRegisterBase, R_UART_MCR, + EFI_SERIAL_REQUEST_TO_SEND | EFI_SERIAL_DATA_TERMINAL_READY); return RETURN_SUCCESS; } |