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/*
* ADM5120 UART definitions
*
* This header file defines the hardware registers of the ADM5120 SoC
* built-in UARTs.
*
* Copyright (C) 2007 OpenWrt.org
* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#ifndef _ADM5120_UART_H_
#define _ADM5120_UART_H_
#define UART_BAUDDIV(clk, baud) ((clk/(16 * (baud)))-1)
#define UART_REG_DATA 0x00
#define UART_REG_RSR 0x04
#define UART_REG_ECR UART_REG_RSR
#define UART_REG_LCRH 0x08
#define UART_REG_LCRM 0x0C
#define UART_REG_LCRL 0x10
#define UART_REG_CTRL 0x14
#define UART_REG_FLAG 0x18
/* Receive Status Register bits */
#define UART_RSR_FE ( 1 << 0 )
#define UART_RSR_PE ( 1 << 1 )
#define UART_RSR_BE ( 1 << 2 )
#define UART_RSR_OE ( 1 << 3 )
#define UART_RSR_ERR ( UART_RSR_FE | UART_RSR_PE | UART_RSR_BE )
#define UART_ECR_ALL 0xFF
/* Line Control High register bits */
#define UART_LCRH_BRK ( 1 << 0 ) /* send break */
#define UART_LCRH_PEN ( 1 << 1 ) /* parity enable */
#define UART_LCRH_EPS ( 1 << 2 ) /* even parity select */
#define UART_LCRH_STP1 ( 0 << 3 ) /* one stop bits select */
#define UART_LCRH_STP2 ( 1 << 3 ) /* two stop bits select */
#define UART_LCRH_FEN ( 1 << 4 ) /* FIFO enable */
#define UART_LCRH_WLEN5 ( 0 << 5 )
#define UART_LCRH_WLEN6 ( 1 << 5 )
#define UART_LCRH_WLEN7 ( 2 << 5 )
#define UART_LCRH_WLEN8 ( 3 << 5 )
/* Control register bits */
#define UART_CTRL_EN ( 1 << 0 )
/* Flag register bits */
#define UART_FLAG_CTS ( 1 << 0 )
#define UART_FLAG_DSR ( 1 << 1 )
#define UART_FLAG_DCD ( 1 << 2 )
#define UART_FLAG_BUSY ( 1 << 3 )
#define UART_FLAG_RXFE ( 1 << 4 )
#define UART_FLAG_TXFF ( 1 << 5 )
#define UART_FLAG_RXFF ( 1 << 6 )
#define UART_FLAG_TXFE ( 1 << 7 )
#endif /* _ADM5120_UART_H_ */
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