1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu #ifndef UART8250_H 7*91f16700Schasinglulu #define UART8250_H 8*91f16700Schasinglulu 9*91f16700Schasinglulu /* UART register */ 10*91f16700Schasinglulu #define UART_RBR 0x00 /* Receive buffer register */ 11*91f16700Schasinglulu #define UART_DLL 0x00 /* Divisor latch lsb */ 12*91f16700Schasinglulu #define UART_THR 0x00 /* Transmit holding register */ 13*91f16700Schasinglulu #define UART_DLH 0x04 /* Divisor latch msb */ 14*91f16700Schasinglulu #define UART_IER 0x04 /* Interrupt enable register */ 15*91f16700Schasinglulu #define UART_FCR 0x08 /* FIFO control register */ 16*91f16700Schasinglulu #define UART_LCR 0x0c /* Line control register */ 17*91f16700Schasinglulu #define UART_MCR 0x10 /* Modem control register */ 18*91f16700Schasinglulu #define UART_LSR 0x14 /* Line status register */ 19*91f16700Schasinglulu #define UART_HIGHSPEED 0x24 /* High speed UART */ 20*91f16700Schasinglulu 21*91f16700Schasinglulu /* FCR */ 22*91f16700Schasinglulu #define UART_FCR_FIFO_EN 0x01 /* enable FIFO */ 23*91f16700Schasinglulu #define UART_FCR_CLEAR_RCVR 0x02 /* clear the RCVR FIFO */ 24*91f16700Schasinglulu #define UART_FCR_CLEAR_XMIT 0x04 /* clear the XMIT FIFO */ 25*91f16700Schasinglulu 26*91f16700Schasinglulu /* LCR */ 27*91f16700Schasinglulu #define UART_LCR_WLS_8 0x03 /* 8 bit character length */ 28*91f16700Schasinglulu #define UART_LCR_DLAB 0x80 /* divisor latch access bit */ 29*91f16700Schasinglulu 30*91f16700Schasinglulu /* MCR */ 31*91f16700Schasinglulu #define UART_MCR_DTR 0x01 32*91f16700Schasinglulu #define UART_MCR_RTS 0x02 33*91f16700Schasinglulu 34*91f16700Schasinglulu /* LSR */ 35*91f16700Schasinglulu #define UART_LSR_DR 0x01 /* Data ready */ 36*91f16700Schasinglulu #define UART_LSR_THRE 0x20 /* Xmit holding register empty */ 37*91f16700Schasinglulu 38*91f16700Schasinglulu #endif /* UART8250_H */ 39