ArmPlatformPkg/PL011Uart: Create PL011 UART driver

This library makes the interface with the PL011 UART controller.
This library can be linked to different types of driver (Serial Console,
debugger, etc) using PL011 UART controller.


ArmPlatformPkg/PL011SerialPortLib: Use Drivers/PL011Uart

Remove the direct accesses to the PL011 UART controller to use the PL011Uart
library.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11743 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 88 insertions, 10 deletions

diff --git a/ArmPlatformPkg/Include/Drivers/PL011Uart.h b/ArmPlatformPkg/Include/Drivers/PL011Uart.h
index 237dc15c28..a9ff2e9eb5 100644
--- a/ArmPlatformPkg/Include/Drivers/PL011Uart.h
+++ b/ArmPlatformPkg/Include/Drivers/PL011Uart.h
@@ -15,8 +15,6 @@
 #ifndef __PL011_UART_H__
 #define __PL011_UART_H__
 
-#define SERIAL_PORT_MAX_TIMEOUT            100000000    // 100 seconds
-
 // PL011 Registers
 #define UARTDR          0x000
 #define UARTRSR         0x004
@@ -41,23 +39,103 @@
 #define UART_19200_IDIV       12
 #define UART_19200_FDIV       37
 
-// data status bits
+// Data status bits
 #define UART_DATA_ERROR_MASK      0x0F00
 
-// status reg bits
+// Status reg bits
 #define UART_STATUS_ERROR_MASK    0x0F
 
-// flag reg bits
+// Flag reg bits
 #define UART_TX_EMPTY_FLAG_MASK   0x80
 #define UART_RX_FULL_FLAG_MASK    0x40
 #define UART_TX_FULL_FLAG_MASK    0x20
 #define UART_RX_EMPTY_FLAG_MASK   0x10
 #define UART_BUSY_FLAG_MASK       0x08
 
-// control reg bits
-#define UART_CTSEN_CONTROL_MASK   0x8000
-#define UART_RTSEN_CONTROL_MASK   0x4000
-#define UART_RTS_CONTROL_MASK     0x0800
-#define UART_DTR_CONTROL_MASK     0x0400
+// Control reg bits
+#define PL011_UARTCR_CTSEN        (1 << 15) // CTS hardware flow control enable
+#define PL011_UARTCR_RTSEN        (1 << 14) // RTS hardware flow control enable
+#define PL011_UARTCR_RTS          (1 << 11) // Request to send
+#define PL011_UARTCR_DTR          (1 << 10) // Data transmit ready.
+#define PL011_UARTCR_RXE          (1 << 9)  // Receive enable
+#define PL011_UARTCR_TXE          (1 << 8)  // Transmit enable
+#define PL011_UARTCR_UARTEN       (1 << 0)  // UART Enable
+
+// Line Control Register Bits
+#define PL011_UARTLCR_H_SPS       (1 << 7)  // Stick parity select
+#define PL011_UARTLCR_H_WLEN_8    (3 << 5)
+#define PL011_UARTLCR_H_WLEN_7    (2 << 5)
+#define PL011_UARTLCR_H_WLEN_6    (1 << 5)
+#define PL011_UARTLCR_H_WLEN_5    (0 << 5)
+#define PL011_UARTLCR_H_FEN       (1 << 4)  // FIFOs Enable
+#define PL011_UARTLCR_H_STP2      (1 << 3)  // Two stop bits select
+#define PL011_UARTLCR_H_EPS       (1 << 2)  // Even parity select
+#define PL011_UARTLCR_H_PEN       (1 << 1)  // Parity Enable
+#define PL011_UARTLCR_H_BRK       (1 << 0)  // Send break
+
+/*
+
+  Programmed hardware of Serial port.
+
+  @return    Always return EFI_UNSUPPORTED.
+
+**/
+RETURN_STATUS
+EFIAPI
+PL011UartInitialize (
+  IN  UINTN       UartBase,
+  IN  UINTN       BaudRate,
+  IN  UINTN       LineControl
+  );
+
+/**
+  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
+PL011UartWrite (
+  IN  UINTN       UartBase,
+  IN UINT8     *Buffer,
+  IN UINTN     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
+PL011UartRead (
+  IN  UINTN       UartBase,
+  OUT UINT8     *Buffer,
+  IN  UINTN     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
+PL011UartPoll (
+  IN  UINTN     UartBase
+  );
 
 #endif