64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/*
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* ADM5120 UART definitions
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*
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* This header file defines the hardware registers of the ADM5120 SoC
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* built-in UARTs.
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*
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* Copyright (C) 2007 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#ifndef _MACH_ADM5120_UART_H
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#define _MACH_ADM5120_UART_H
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#define UART_BAUDDIV(clk, baud) ((clk/(16 * (baud)))-1)
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#define UART_REG_DATA 0x00
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#define UART_REG_RSR 0x04
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#define UART_REG_ECR UART_REG_RSR
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#define UART_REG_LCRH 0x08
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#define UART_REG_LCRM 0x0C
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#define UART_REG_LCRL 0x10
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#define UART_REG_CTRL 0x14
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#define UART_REG_FLAG 0x18
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/* Receive Status Register bits */
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#define UART_RSR_FE ( 1 << 0 )
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#define UART_RSR_PE ( 1 << 1 )
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#define UART_RSR_BE ( 1 << 2 )
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#define UART_RSR_OE ( 1 << 3 )
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#define UART_RSR_ERR ( UART_RSR_FE | UART_RSR_PE | UART_RSR_BE )
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#define UART_ECR_ALL 0xFF
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/* Line Control High register bits */
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#define UART_LCRH_BRK ( 1 << 0 ) /* send break */
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#define UART_LCRH_PEN ( 1 << 1 ) /* parity enable */
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#define UART_LCRH_EPS ( 1 << 2 ) /* even parity select */
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#define UART_LCRH_STP1 ( 0 << 3 ) /* one stop bits select */
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#define UART_LCRH_STP2 ( 1 << 3 ) /* two stop bits select */
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#define UART_LCRH_FEN ( 1 << 4 ) /* FIFO enable */
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#define UART_LCRH_WLEN5 ( 0 << 5 )
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#define UART_LCRH_WLEN6 ( 1 << 5 )
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#define UART_LCRH_WLEN7 ( 2 << 5 )
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#define UART_LCRH_WLEN8 ( 3 << 5 )
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/* Control register bits */
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#define UART_CTRL_EN ( 1 << 0 )
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/* Flag register bits */
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#define UART_FLAG_CTS ( 1 << 0 )
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#define UART_FLAG_DSR ( 1 << 1 )
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#define UART_FLAG_DCD ( 1 << 2 )
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#define UART_FLAG_BUSY ( 1 << 3 )
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#define UART_FLAG_RXFE ( 1 << 4 )
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#define UART_FLAG_TXFF ( 1 << 5 )
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#define UART_FLAG_RXFF ( 1 << 6 )
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#define UART_FLAG_TXFE ( 1 << 7 )
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#endif /* _MACH_ADM5120_UART_H */
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