include/nios-io.h

/*
 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
 * Scott McNutt <smcnutt@psyent.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*************************************************************************
 * Altera Nios Standard Peripherals
 ************************************************************************/

#ifndef __NIOSIO_H__
#define __NIOSIO_H__

/*------------------------------------------------------------------------
 * UART
 *----------------------------------------------------------------------*/
typedef volatile struct nios_uart_t {
	unsigned	rxdata;		/* Rx data reg */
	unsigned	txdata;		/* Tx data reg */
	unsigned	status;		/* Status reg */
	unsigned	control;	/* Control reg */
	unsigned	divisor;	/* Baud rate divisor reg */
	unsigned	endofpacket;	/* End-of-packet reg */
}nios_uart_t;

/* status register */
#define NIOS_UART_PE		(1 << 0)	/* parity error */
#define NIOS_UART_FE		(1 << 1)	/* frame error */
#define NIOS_UART_BRK		(1 << 2)	/* break detect */
#define NIOS_UART_ROE		(1 << 3)	/* rx overrun */
#define NIOS_UART_TOE		(1 << 4)	/* tx overrun */
#define NIOS_UART_TMT		(1 << 5)	/* tx empty */
#define NIOS_UART_TRDY		(1 << 6)	/* tx ready */
#define NIOS_UART_RRDY		(1 << 7)	/* rx ready */
#define NIOS_UART_E		(1 << 8)	/* exception */
#define NIOS_UART_DCTS		(1 << 10)	/* cts change */
#define NIOS_UART_CTS		(1 << 11)	/* cts */
#define NIOS_UART_EOP		(1 << 12)	/* eop detected */

/* control register */
#define NIOS_UART_IPE		(1 << 0)	/* parity error int ena*/
#define NIOS_UART_IFE		(1 << 1)	/* frame error int ena */
#define NIOS_UART_IBRK		(1 << 2)	/* break detect int ena */
#define NIOS_UART_IROE		(1 << 3)	/* rx overrun int ena */
#define NIOS_UART_ITOE		(1 << 4)	/* tx overrun int ena */
#define NIOS_UART_ITMT		(1 << 5)	/* tx empty int ena */
#define NIOS_UART_ITRDY		(1 << 6)	/* tx ready int ena */
#define NIOS_UART_IRRDY		(1 << 7)	/* rx ready int ena */
#define NIOS_UART_IE		(1 << 8)	/* exception int ena */
#define NIOS_UART_TBRK		(1 << 9)	/* transmit break */
#define NIOS_UART_IDCTS		(1 << 10)	/* cts change int ena */
#define NIOS_UART_RTS		(1 << 11)	/* rts */
#define NIOS_UART_IEOP		(1 << 12)	/* eop detected int ena */


/*------------------------------------------------------------------------
 * TIMER
 *----------------------------------------------------------------------*/
typedef volatile struct nios_timer_t {
	unsigned	status;			/* Timer status reg */
	unsigned	control;		/* Timer control reg */
	unsigned	periodl;		/* Timeout period low */
	unsigned	periodh;		/* Timeout period high */
	unsigned	snapl;			/* Snapshot low */
	unsigned	snaph;			/* Snapshot high */
}nios_timer_t;

/* status register */
#define NIOS_TIMER_TO		(1 << 0)	/* Timeout */
#define NIOS_TIMER_RUN		(1 << 1)	/* Timer running */

/* control register */
#define NIOS_TIMER_ITO		(1 << 0)	/* Timeout int ena */
#define NIOS_TIMER_CONT		(1 << 1)	/* Continuous mode */
#define NIOS_TIMER_START	(1 << 2)	/* Start timer */
#define NIOS_TIMER_STOP		(1 << 3)	/* Stop timer */

#endif /* __NIOSIO_H__ */