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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
*/
/**
------------
CVS : $Id: scom.h,v 1.1.1.1 2002-03-29 14:12:51 pj Exp $
File: $File$
Revision: $Revision: 1.1.1.1 $
Last update: $Date: 2002-03-29 14:12:51 $
------------
**/
/*
* 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
*
*/
/* Project: HARTIK 3.0 */
/* Description: Hard Real TIme Kernel for 386 & higher machines */
/* Author: Gerardo Lamastra */
/* Date: 9/5/96 */
/* File: SCOM.H */
/* Revision: 2.0 */
#ifndef __SCOM_H__
#define __SCOM_H__
#ifdef __cplusplus
extern "C" {
#endif
#include <modules/sem.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))
/* The descriptor of a serial link */
/* Each array entry is associated to a COM port */
/* The control field is used to specify which kind of interrupts */
/* are going to be served; the status field tracks if the entry */
/* is curretly used & if the shared fast handler is linked */
/* The semaphores are opened if you use an asyncronous server */
/* with the link */
extern struct COM_LINK {
/* These fields are for general use */
BYTE status;
BYTE control;
BYTE request;
BYTE msk;
PID server;
sem_t mutex;
sem_t tx_sem;
sem_t rx_sem;
BYTE *tx_buf;
BYTE *rx_buf;
unsigned tx_len,rx_len;
unsigned tx_cnt,rx_cnt;
} com_link[COM_LINKS];
/* Available servers */
TASK duplexServer(int port);
TASK rxServer(int port);
int com_open(unsigned int port,DWORD speed,BYTE parity,BYTE len,BYTE stop);
int com_server(unsigned int port,unsigned int control,PID server);
int com_close(unsigned int port);
unsigned com_read(unsigned int port,unsigned int reg);
unsigned com_receive(unsigned int port);
void com_write(unsigned int port,unsigned int reg,unsigned int value);
void com_send(unsigned int port,BYTE b);
void com_AsyncSend(int port,void *buf,unsigned int len);
void com_AsyncReceive(int port,void *buf,unsigned int len);
#ifdef __cplusplus
};
#endif
#endif