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Diffstat (limited to 'ArmRealViewEbPkg/Include/ArmEb/ArmEbUart.h')
| -rwxr-xr-x | ArmRealViewEbPkg/Include/ArmEb/ArmEbUart.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/ArmRealViewEbPkg/Include/ArmEb/ArmEbUart.h b/ArmRealViewEbPkg/Include/ArmEb/ArmEbUart.h new file mode 100755 index 0000000..642b83a --- /dev/null +++ b/ArmRealViewEbPkg/Include/ArmEb/ArmEbUart.h @@ -0,0 +1,75 @@ +/*++
+
+Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+Portions copyright (c) 2009, Hewlett-Packard Company. All rights reserved.<BR>
+Portions copyright (c) 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.
+
+--*/
+
+#ifndef __ARM_EB_UART_H__
+#define __ARM_EB_UART_H__
+
+
+#define SERIAL_PORT_MAX_TIMEOUT 100000000 // 100 seconds
+
+
+// EB constants
+#define EB_UART1_BASE 0x10009000
+
+// PL011 Registers
+#define UARTDR 0x000
+#define UARTRSR 0x004
+#define UARTECR 0x004
+#define UARTFR 0x018
+#define UARTILPR 0x020
+#define UARTIBRD 0x024
+#define UARTFBRD 0x028
+#define UARTLCR_H 0x02C
+#define UARTCR 0x030
+#define UARTIFLS 0x034
+#define UARTIMSC 0x038
+#define UARTRIS 0x03C
+#define UARTMIS 0x040
+#define UARTICR 0x044
+#define UARTDMACR 0x048
+
+// If the required baud rate is 115200 and UARTCLK = 24MHz then:
+// Baud Rate Divisor = (24×10^6)/(16×115200) = 13.020833
+// This means BRDI = 13 and BRDF = 0.020833
+// Therefore, fractional part, m = integer(0.020833×64) = integer(1.33331) = 1
+// Generated baud rate divider = 13+1/64 = 13.015625
+// Generated baud rate = (24×10^6)/(16×13.015625) = 115246.098
+// Error = (115246.098-115200)/115200 × 100 = 0.04%
+#define UART_115200_IDIV 13
+#define UART_115200_FDIV 1
+
+// add more baud rates here as needed
+
+// data status bits
+#define UART_DATA_ERROR_MASK 0x0F00
+
+// status reg bits
+#define UART_STATUS_ERROR_MASK 0x0F
+
+// 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
+
+
+#endif
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