X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=ArmEbPkg%2FLibrary%2FSerialPortLib%2FSerialPortLib.c;fp=ArmEbPkg%2FLibrary%2FSerialPortLib%2FSerialPortLib.c;h=d98164667f304729478a4525a8c77e81b942dd17;hp=0000000000000000000000000000000000000000;hb=1fde2f618c76ea2a79b5b16e121cead5dbaf02bc;hpb=5aa324d9f3a4b9ab76cd17b1363cf757e53f84e5

diff --git a/ArmEbPkg/Library/SerialPortLib/SerialPortLib.c b/ArmEbPkg/Library/SerialPortLib/SerialPortLib.c
new file mode 100644
index 0000000000..d98164667f
--- /dev/null
+++ b/ArmEbPkg/Library/SerialPortLib/SerialPortLib.c
@@ -0,0 +1,137 @@
+/** @file
+  Serial I/O Port library functions with no library constructor/destructor
+
+
+  Copyright (c) 2008-2010, Apple Inc. All rights reserved.
+  
+  All rights reserved. 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 <Base.h>
+#include <Library/DebugLib.h>
+#include <Library/SerialPortLib.h>
+#include <Library/PcdLib.h>
+#include <Library/IoLib.h>
+#include <ArmEbUart.h>
+
+/*
+
+  Programmed hardware of Serial port.
+
+  @return    Always return EFI_UNSUPPORTED.
+
+**/
+RETURN_STATUS
+EFIAPI
+SerialPortInitialize (
+  VOID
+  )
+{
+  UINT32  Base = PcdGet32 (PcdConsoleUart);
+  
+  // initialize baud rate generator to 115200 based on EB clock REFCLK24MHZ
+  MmioWrite32 (Base + UARTIBRD, UART_115200_IDIV);
+  MmioWrite32 (Base + UARTFBRD, UART_115200_FDIV);
+
+  // no parity, 1 stop, no fifo, 8 data bits
+  MmioWrite32 (Base + UARTLCR_H, 0x60);
+
+  // clear any pending errors
+  MmioWrite32 (Base + UARTECR, 0);
+
+  // enable tx, rx, and uart overall
+  MmioWrite32 (Base + UARTCR, 0x301);
+
+  return RETURN_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
+)
+{
+  UINT32 FR = PcdGet32(PcdConsoleUart) + UARTFR;
+  UINT32 DR = PcdGet32(PcdConsoleUart) + UARTDR;
+  UINTN  Count;
+    
+  for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
+    while ((MmioRead32 (FR) & UART_TX_EMPTY_FLAG_MASK) != 0);
+    MmioWrite8 (DR, *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
+)
+{
+  UINT32  FR = PcdGet32(PcdConsoleUart) + UARTFR;
+  UINT32  DR = PcdGet32(PcdConsoleUart) + UARTDR;
+  UINTN   Count;
+    
+  for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {
+    while ((MmioRead32 (FR) & UART_RX_EMPTY_FLAG_MASK) == 0);
+    *Buffer = MmioRead8 (DR);
+  }
+
+  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
+  )
+{
+  UINT32 FR = PcdGet32(PcdConsoleUart) + UARTFR;
+
+  if ((MmioRead32 (FR) & UART_RX_EMPTY_FLAG_MASK) == 0) {
+    return TRUE;
+  } else {
+    return FALSE;
+  }
+}
+