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All identifiers, regardless of use, that start with two underscores are reserved. This means they can't be used in header guards. The style that this project is now to use the full name of the file in capital letters followed by 'H'. For example, for a file called "uart_example.h", the header guard is UART_EXAMPLE_H. The exceptions are files that are imported from other projects: - CryptoCell driver - dt-bindings folders - zlib headers Change-Id: I50561bf6c88b491ec440d0c8385c74650f3c106e Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/*
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* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef UART8250_H
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#define UART8250_H
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/* UART register */
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#define UART_RBR 0x00 /* Receive buffer register */
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#define UART_DLL 0x00 /* Divisor latch lsb */
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#define UART_THR 0x00 /* Transmit holding register */
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#define UART_DLH 0x04 /* Divisor latch msb */
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#define UART_IER 0x04 /* Interrupt enable register */
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#define UART_FCR 0x08 /* FIFO control register */
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#define UART_LCR 0x0c /* Line control register */
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#define UART_MCR 0x10 /* Modem control register */
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#define UART_LSR 0x14 /* Line status register */
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#define UART_HIGHSPEED 0x24 /* High speed UART */
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/* FCR */
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#define UART_FCR_FIFO_EN 0x01 /* enable FIFO */
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#define UART_FCR_CLEAR_RCVR 0x02 /* clear the RCVR FIFO */
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#define UART_FCR_CLEAR_XMIT 0x04 /* clear the XMIT FIFO */
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/* LCR */
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#define UART_LCR_WLS_8 0x03 /* 8 bit character length */
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#define UART_LCR_DLAB 0x80 /* divisor latch access bit */
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/* MCR */
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#define UART_MCR_DTR 0x01
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#define UART_MCR_RTS 0x02
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/* LSR */
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#define UART_LSR_DR 0x01 /* Data ready */
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#define UART_LSR_THRE 0x20 /* Xmit holding register empty */
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#endif /* UART8250_H */
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