Started working on an ArmEb package. GIC is ported. SEC is a start. Still missing...

[mirror_edk2.git] / ArmEbPkg / Library / SerialPortLib / SerialPortLib.c

diff --git a/ArmEbPkg/Library/SerialPortLib/SerialPortLib.c b/ArmEbPkg/Library/SerialPortLib/SerialPortLib.c
new file mode 100644 (file)
index 0000000..d981646
--- /dev/null
+++ b/ArmEbPkg/Library/SerialPortLib/SerialPortLib.c
@@ -0,0 +1,137 @@
+/** @file\r
+  Serial I/O Port library functions with no library constructor/destructor\r
+\r
+\r
+  Copyright (c) 2008-2010, Apple Inc. All rights reserved.\r
+  \r
+  All rights reserved. This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include <Base.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/SerialPortLib.h>\r
+#include <Library/PcdLib.h>\r
+#include <Library/IoLib.h>\r
+#include <ArmEbUart.h>\r
+\r
+/*\r
+\r
+  Programmed hardware of Serial port.\r
+\r
+  @return    Always return EFI_UNSUPPORTED.\r
+\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+SerialPortInitialize (\r
+  VOID\r
+  )\r
+{\r
+  UINT32  Base = PcdGet32 (PcdConsoleUart);\r
+  \r
+  // initialize baud rate generator to 115200 based on EB clock REFCLK24MHZ\r
+  MmioWrite32 (Base + UARTIBRD, UART_115200_IDIV);\r
+  MmioWrite32 (Base + UARTFBRD, UART_115200_FDIV);\r
+\r
+  // no parity, 1 stop, no fifo, 8 data bits\r
+  MmioWrite32 (Base + UARTLCR_H, 0x60);\r
+\r
+  // clear any pending errors\r
+  MmioWrite32 (Base + UARTECR, 0);\r
+\r
+  // enable tx, rx, and uart overall\r
+  MmioWrite32 (Base + UARTCR, 0x301);\r
+\r
+  return RETURN_SUCCESS;\r
+}\r
+\r
+/**\r
+  Write data to serial device.\r
+\r
+  @param  Buffer           Point of data buffer which need to be writed.\r
+  @param  NumberOfBytes    Number of output bytes which are cached in Buffer.\r
+\r
+  @retval 0                Write data failed.\r
+  @retval !0               Actual number of bytes writed to serial device.\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+SerialPortWrite (\r
+  IN UINT8     *Buffer,\r
+  IN UINTN     NumberOfBytes\r
+)\r
+{\r
+  UINT32 FR = PcdGet32(PcdConsoleUart) + UARTFR;\r
+  UINT32 DR = PcdGet32(PcdConsoleUart) + UARTDR;\r
+  UINTN  Count;\r
+    \r
+  for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {\r
+    while ((MmioRead32 (FR) & UART_TX_EMPTY_FLAG_MASK) != 0);\r
+    MmioWrite8 (DR, *Buffer);\r
+  }\r
+\r
+  return NumberOfBytes;\r
+}\r
+\r
+\r
+/**\r
+  Read data from serial device and save the datas in buffer.\r
+\r
+  @param  Buffer           Point of data buffer which need to be writed.\r
+  @param  NumberOfBytes    Number of output bytes which are cached in Buffer.\r
+\r
+  @retval 0                Read data failed.\r
+  @retval !0               Aactual number of bytes read from serial device.\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+SerialPortRead (\r
+  OUT UINT8     *Buffer,\r
+  IN  UINTN     NumberOfBytes\r
+)\r
+{\r
+  UINT32  FR = PcdGet32(PcdConsoleUart) + UARTFR;\r
+  UINT32  DR = PcdGet32(PcdConsoleUart) + UARTDR;\r
+  UINTN   Count;\r
+    \r
+  for (Count = 0; Count < NumberOfBytes; Count++, Buffer++) {\r
+    while ((MmioRead32 (FR) & UART_RX_EMPTY_FLAG_MASK) == 0);\r
+    *Buffer = MmioRead8 (DR);\r
+  }\r
+\r
+  return NumberOfBytes;\r
+}\r
+\r
+\r
+/**\r
+  Check to see if any data is avaiable to be read from the debug device.\r
+\r
+  @retval EFI_SUCCESS       At least one byte of data is avaiable to be read\r
+  @retval EFI_NOT_READY     No data is avaiable to be read\r
+  @retval EFI_DEVICE_ERROR  The serial device is not functioning properly\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+SerialPortPoll (\r
+  VOID\r
+  )\r
+{\r
+  UINT32 FR = PcdGet32(PcdConsoleUart) + UARTFR;\r
+\r
+  if ((MmioRead32 (FR) & UART_RX_EMPTY_FLAG_MASK) == 0) {\r
+    return TRUE;\r
+  } else {\r
+    return FALSE;\r
+  }\r
+}\r
+\r