Add ArmPlatformPkg from ARM Ltd. patch.

[mirror_edk2.git] / ArmPlatformPkg / Library / PL011SerialPortLib / PL011SerialPortLib.c

diff --git a/ArmPlatformPkg/Library/PL011SerialPortLib/PL011SerialPortLib.c b/ArmPlatformPkg/Library/PL011SerialPortLib/PL011SerialPortLib.c
new file mode 100644 (file)
index 0000000..54ea28a
--- /dev/null
+++ b/ArmPlatformPkg/Library/PL011SerialPortLib/PL011SerialPortLib.c
@@ -0,0 +1,133 @@
+/** @file
+  Serial I/O Port library functions with no library constructor/destructor
+
+
+  Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
+  
+  This program and the accompanying materials
+  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
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Include/Uefi.h>
+#include <Library/SerialPortLib.h>
+#include <Library/IoLib.h>
+#include <Drivers/PL011Uart.h>
+#include <ArmPlatform.h>
+
+/*
+
+  Programmed hardware of Serial port.
+
+  @return    Always return EFI_UNSUPPORTED.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortInitialize (
+  VOID
+  )
+{
+       if (PL011_CONSOLE_UART_SPEED == 115200) {
+               // Initialize baud rate generator
+               MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTIBRD, UART_115200_IDIV);
+               MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTFBRD, UART_115200_FDIV);
+       } else if (PL011_CONSOLE_UART_SPEED == 38400) {
+               // Initialize baud rate generator
+               MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTIBRD, UART_38400_IDIV);
+               MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTFBRD, UART_38400_FDIV);
+       } else if (PL011_CONSOLE_UART_SPEED == 19200) {
+               // Initialize baud rate generator
+               MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTIBRD, UART_19200_IDIV);
+               MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTFBRD, UART_19200_FDIV);
+       } else {
+               return EFI_INVALID_PARAMETER;
+       }
+
+  // No parity, 1 stop, no fifo, 8 data bits
+  MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTLCR_H, 0x60);
+
+  // Clear any pending errors
+  MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTECR, 0);
+
+  // enable tx, rx, and uart overall
+  MmioWrite32 (PL011_CONSOLE_UART_BASE + UARTCR, 0x301);
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Write data to serial device.
+
+  @param  Buffer           Point of data buffer which need to be writed.
+  @param  NumberOfBytes    Number of output bytes which are cached in Buffer.
+
+  @retval 0                Write data failed.
+  @retval !0               Actual number of bytes writed to serial device.
+
+**/
+UINTN
+EFIAPI
+SerialPortWrite (
+  IN UINT8     *Buffer,
+  IN UINTN     NumberOfBytes
+)
+{
+       UINTN  Count;
+
+       for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
+               while ((MmioRead32 (PL011_CONSOLE_UART_BASE + UARTFR) & UART_TX_EMPTY_FLAG_MASK) == 0);
+               MmioWrite8 (PL011_CONSOLE_UART_BASE + UARTDR, *Buffer);
+       }
+
+       return NumberOfBytes;
+}
+
+/**
+  Read data from serial device and save the datas in buffer.
+
+  @param  Buffer           Point of data buffer which need to be writed.
+  @param  NumberOfBytes    Number of output bytes which are cached in Buffer.
+
+  @retval 0                Read data failed.
+  @retval !0               Aactual number of bytes read from serial device.
+
+**/
+UINTN
+EFIAPI
+SerialPortRead (
+  OUT UINT8     *Buffer,
+  IN  UINTN     NumberOfBytes
+)
+{
+  UINTN   Count;
+
+       for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
+               while ((MmioRead32 (PL011_CONSOLE_UART_BASE + UARTFR) & UART_RX_EMPTY_FLAG_MASK) != 0);
+               *Buffer = MmioRead8 (PL011_CONSOLE_UART_BASE + UARTDR);
+       }
+
+       return NumberOfBytes;
+}
+
+/**
+  Check to see if any data is avaiable to be read from the debug device.
+
+  @retval EFI_SUCCESS       At least one byte of data is avaiable to be read
+  @retval EFI_NOT_READY     No data is avaiable to be read
+  @retval EFI_DEVICE_ERROR  The serial device is not functioning properly
+
+**/
+BOOLEAN
+EFIAPI
+SerialPortPoll (
+  VOID
+  )
+{
+  return ((MmioRead32 (PL011_CONSOLE_UART_BASE + UARTFR) & UART_RX_EMPTY_FLAG_MASK) == 0);
+}