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/*
* Project: S.Ha.R.K.
*
* Coordinators:
* Giorgio Buttazzo <giorgio@sssup.it>
* Paolo Gai <pj@gandalf.sssup.it>
*
* Authors :
* Paolo Gai <pj@gandalf.sssup.it>
* Massimiliano Giorgi <massy@gandalf.sssup.it>
* Luca Abeni <luca@gandalf.sssup.it>
* (see the web pages for full authors list)
*
* ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
*
* http://www.sssup.it
* http://retis.sssup.it
* http://shark.sssup.it
*/
/*
* Copyright (C) 2000 Gerardo Lamastra
*
* 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
*
*/
#ifndef __SCOM_H__
#define __SCOM_H__
/* Number of available COM links */
#define COM_LINKS 4
#define COM1 0
#define COM2 1
#define COM3 2
#define COM4 3
/* These values identify interrupt type */
#define RX_FULL 1
#define TX_EMPTY 2
#define LS_CHANGED 4
#define MS_CHANGED 8
/* This is set when the channel is open */
#define LINK_BUSY 128
/* This is set if the fast handler is installed */
#define FAST_INSTALLED 64
/* Register displacements */
#define THR 0
#define RBR 0
#define IER 1
#define FCR 2
#define IIR 2
#define LCR 3
#define MCR 4
#define LSR 5
#define MSR 6
#define SPad 7
/* Parity value */
#define NONE 0
#define ODD 1
#define EVEN 3
/* Used for decoding the IIR status */
extern const int IIRbits[];
#define DECODE(v) IIRbits[((v >> 1) & 3)]
#define PENDIRQ(v) !((v) & 1)
/* Bit setting macros */
#define bit_on(v,b) v |= (b)
#define bit_off(v,b) v &= (~(b))
int com_open(unsigned port, DWORD speed, BYTE parity, BYTE len, BYTE stop);
int com_close(unsigned port);
unsigned com_read(unsigned port, unsigned reg);
unsigned com_receive(unsigned port);
void com_write(unsigned port, unsigned reg, unsigned value);
unsigned com_send(unsigned port, BYTE b, unsigned wait);
#endif