diff options
Diffstat (limited to 'ArmPlatformPkg/Include/Drivers/PL011Uart.h')
| -rw-r--r-- | ArmPlatformPkg/Include/Drivers/PL011Uart.h | 98 |
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 |