1027 lines
22 KiB
C
1027 lines
22 KiB
C
/* $NetBSD: dc.c,v 1.3 1996/10/11 01:51:46 christos Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell and Rick Macklem.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dc.c 8.2 (Berkeley) 11/30/93
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*/
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/*
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* devDC7085.c --
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*
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* This file contains machine-dependent routines that handle the
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* output queue for the serial lines.
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*
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* Copyright (C) 1989 Digital Equipment Corporation.
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies.
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* Digital Equipment Corporation makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* from: Header: /sprite/src/kernel/dev/ds3100.md/RCS/devDC7085.c,
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* v 1.4 89/08/29 11:55:30 nelson Exp SPRITE (DECWRL)";
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*/
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#include "dc.h"
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#if NDC > 0
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/*
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* DC7085 (DZ-11 look alike) Driver
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*
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* bertram 13-apr-1996: slightly modfied for DC367B in VS2000
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/map.h>
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#include <sys/buf.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <sys/kernel.h>
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#include <sys/syslog.h>
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/*
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* bertram 17-apr-1996: we could use most of the include files directly
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* from the pmax port, only some of the paddings need
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* to be changed. For now we use modified copies...
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*
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* #include <pmax/include/dc7085cons.h>
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* #include <pmax/include/pmioctl.h>
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*
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* #include <pmax/dev/pdma.h>
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* #include <pmax/dev/lk201.h>
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*/
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#include "dc7085cons.h" /* this one is modified !!! */
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#include <pmax/include/pmioctl.h>
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#include <pmax/dev/pdma.h>
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#include <pmax/dev/lk201.h>
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#include <sys/device.h>
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/*
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* here follow some pmax specific includes which we don't need...
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*/
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#ifdef pmax
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#include <machine/autoconf.h>
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#include <machine/machConst.h>
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#include <pmax/pmax/pmaxtype.h>
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#include <pmax/pmax/cons.h>
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#endif
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#ifdef vax
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#include <machine/sid.h>
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#include <machine/uvax.h>
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#include <machine/vsbus.h>
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#include <pmax/pmax/cons.h> /* we need to modify this for VAXen */
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#define MachEmptyWriteBuffer() /* we don't need this for VAXstation */
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#endif
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#include <pmax/dev/dcvar.h>
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struct dc_softc {
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struct device sc_dv;
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struct pdma dc_pdma[4];
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void *xmit_cfargs;
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void *recv_cfargs;
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};
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/*
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* Autoconfiguration data for config.
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*
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* Use the statically-allocated softc until old autoconfig code and
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* config.old are completely gone.
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*/
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int dcmatch __P((struct device * parent, void *cfdata, void *aux));
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void dcattach __P((struct device *parent, struct device *self, void *aux));
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int dc_doprobe __P((void *addr, int unit, int flags, int pri));
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int dcintr __P((void * xxxunit));
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struct cfdriver dc_cd = {
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NULL, "dc", DV_TTY
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};
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struct cfattach dc_ca = {
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sizeof(struct dc_softc), dcmatch, dcattach
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};
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#define NDCLINE (NDC*4)
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void dcstart __P((struct tty *));
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void dcxint __P((struct tty *));
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void dcPutc __P((dev_t, int));
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void dcscan __P((void *));
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extern void ttrstrt __P((void *));
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int dcGetc __P((dev_t));
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int dcparam __P((struct tty *, struct termios *));
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struct tty *dc_tty[NDCLINE];
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int dc_cnt = NDCLINE;
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void (*dcDivertXInput)(); /* X windows keyboard input routine */
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void (*dcMouseEvent)(); /* X windows mouse motion event routine */
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void (*dcMouseButtons)(); /* X windows mouse buttons event routine */
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#ifdef DEBUG
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int debugChar;
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#endif
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/*
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* Software copy of brk register since it isn't readable
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*/
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int dc_brk[NDC];
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char dcsoftCAR[NDC]; /* mask of dc's with carrier on (DSR) */
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/*
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* The DC7085 doesn't interrupt on carrier transitions, so
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* we have to use a timer to watch it.
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*/
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int dc_timer; /* true if timer started */
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/*
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* Pdma structures for fast output code
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*/
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struct pdma dcpdma[NDCLINE];
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struct speedtab dcspeedtab[] = {
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0, 0,
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50, LPR_B50,
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75, LPR_B75,
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110, LPR_B110,
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134, LPR_B134,
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150, LPR_B150,
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300, LPR_B300,
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600, LPR_B600,
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1200, LPR_B1200,
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1800, LPR_B1800,
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2400, LPR_B2400,
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4800, LPR_B4800,
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9600, LPR_B9600,
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19200, LPR_B19200,
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-1, -1
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};
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#ifndef PORTSELECTOR
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#define ISPEED TTYDEF_SPEED
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#define LFLAG TTYDEF_LFLAG
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#else
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#define ISPEED B4800
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#define LFLAG (TTYDEF_LFLAG & ~ECHO)
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#endif
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static struct {
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void *xmit_cfargs;
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void *recv_cfargs;
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} vs2000_hack = { NULL, NULL };
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/*
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* Match driver based on name
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*/
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int
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dcmatch(parent, match, aux)
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struct device *parent;
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void *match;
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void *aux;
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{
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struct cfdata *cf = match;
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struct confargs *ca = aux;
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static int nunits = 0;
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return (0);
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if (strcmp(ca->ca_name, "dc") != 0 &&
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strcmp(ca->ca_name, "mdc") != 0 &&
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strcmp(ca->ca_name, "dc367") != 0 &&
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strcmp(ca->ca_name, "dc7085") != 0)
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return (0);
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/*
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* Use statically-allocated softc and attach code until
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* old config is completely gone. Don't over-run softc.
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*/
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if (nunits > NDC) {
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kprintf("dc: too many units for old config\n");
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return (0);
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}
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nunits++;
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return (1);
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}
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void
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dcattach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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register struct confargs *ca = aux;
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u_long dcaddr;
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dcaddr = (u_long)ca->ca_ioaddr;
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(void) dc_doprobe((void*)uvax_phys2virt(dcaddr),
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self->dv_unit, self->dv_cfdata->cf_flags,
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ca->ca_intslot);
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/* tie pseudo-slot to device */
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#ifdef notyet
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vsbus_intr_register(ca, dcintr, self);
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vsbus_intr_enable(ca);
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#endif
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kprintf("\n");
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}
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/*
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* Is there a framebuffer console device using this serial driver?
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* XXX used for ugly special-cased console input that should be redone
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* more cleanly.
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*/
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static inline int
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raster_console()
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{
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return (cn_tab->cn_pri == CN_INTERNAL ||
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cn_tab->cn_pri == CN_NORMAL);
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}
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/*
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* DC7085 (dz-11) probe routine from old-style config.
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* This is only here out of intertia.
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*/
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int
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dc_doprobe(addr, unit, flags, priority)
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void *addr;
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int unit, flags, priority;
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{
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register dcregs *dcaddr;
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register struct pdma *pdp;
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register struct tty *tp;
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register int cntr;
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int s;
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if (unit >= NDC)
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return (0);
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if (badaddr(addr, 2))
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return (0);
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/*
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* For a remote console, wait a while for previous output to
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* complete.
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*/
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if (major(cn_tab->cn_dev) == DCDEV && unit == 0 &&
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cn_tab->cn_pri == CN_REMOTE)
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DELAY(10000);
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/* reset chip */
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dcaddr = (dcregs *)addr;
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dcaddr->dc_csr = CSR_CLR;
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MachEmptyWriteBuffer();
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while (dcaddr->dc_csr & CSR_CLR)
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;
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dcaddr->dc_csr = CSR_MSE | CSR_TIE | CSR_RIE;
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/* init pseudo DMA structures */
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pdp = &dcpdma[unit * 4];
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for (cntr = 0; cntr < 4; cntr++) {
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pdp->p_addr = (void *)dcaddr;
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tp = dc_tty[unit * 4 + cntr] = ttymalloc();
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pdp->p_arg = (int) tp;
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pdp->p_fcn = dcxint;
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pdp++;
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}
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dcsoftCAR[unit] = flags | 0xB;
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if (dc_timer == 0) {
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dc_timer = 1;
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timeout(dcscan, (void *)0, hz);
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}
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/*
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* Special handling for consoles.
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*/
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if (unit == 0) {
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if (cn_tab->cn_pri == CN_INTERNAL ||
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cn_tab->cn_pri == CN_NORMAL) {
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s = spltty();
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dcaddr->dc_lpr = LPR_RXENAB | LPR_8_BIT_CHAR |
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LPR_B4800 | DCKBD_PORT;
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MachEmptyWriteBuffer();
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dcaddr->dc_lpr = LPR_RXENAB | LPR_B4800 | LPR_OPAR |
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LPR_PARENB | LPR_8_BIT_CHAR | DCMOUSE_PORT;
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MachEmptyWriteBuffer();
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DELAY(1000);
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KBDReset(makedev(DCDEV, DCKBD_PORT), dcPutc);
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MouseInit(makedev(DCDEV, DCMOUSE_PORT), dcPutc, dcGetc);
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splx(s);
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} else if (major(cn_tab->cn_dev) == DCDEV) {
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s = spltty();
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dcaddr->dc_lpr = LPR_RXENAB | LPR_8_BIT_CHAR |
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LPR_B9600 | minor(cn_tab->cn_dev);
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MachEmptyWriteBuffer();
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DELAY(1000);
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/*cn_tab.cn_disabled = 0;*/ /* FIXME */
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splx(s);
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}
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}
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return (1);
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}
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dcopen(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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register struct tty *tp;
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register int unit;
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int s, error = 0;
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unit = minor(dev);
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if (unit >= dc_cnt || dcpdma[unit].p_addr == (void *)0)
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return (ENXIO);
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tp = dc_tty[unit];
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if (tp == NULL)
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tp = dc_tty[unit] = ttymalloc();
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tp->t_oproc = dcstart;
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tp->t_param = dcparam;
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tp->t_dev = dev;
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if ((tp->t_state & TS_ISOPEN) == 0) {
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tp->t_state |= TS_WOPEN;
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ttychars(tp);
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#ifndef PORTSELECTOR
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if (tp->t_ispeed == 0) {
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#endif
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_cflag = TTYDEF_CFLAG;
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tp->t_lflag = LFLAG;
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tp->t_ispeed = tp->t_ospeed = ISPEED;
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#ifdef PORTSELECTOR
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tp->t_cflag |= HUPCL;
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#else
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}
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#endif
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(void) dcparam(tp, &tp->t_termios);
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ttsetwater(tp);
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} else if ((tp->t_state & TS_XCLUDE) && curproc->p_ucred->cr_uid != 0)
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return (EBUSY);
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(void) dcmctl(dev, DML_DTR, DMSET);
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s = spltty();
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while (!(flag & O_NONBLOCK) && !(tp->t_cflag & CLOCAL) &&
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!(tp->t_state & TS_CARR_ON)) {
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tp->t_state |= TS_WOPEN;
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if (error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH,
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ttopen, 0))
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break;
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}
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splx(s);
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if (error)
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return (error);
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return ((*linesw[tp->t_line].l_open)(dev, tp));
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}
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/*ARGSUSED*/
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dcclose(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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register struct tty *tp;
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register int unit, bit;
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unit = minor(dev);
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tp = dc_tty[unit];
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bit = 1 << ((unit & 03) + 8);
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if (dc_brk[unit >> 2] & bit) {
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dc_brk[unit >> 2] &= ~bit;
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ttyoutput(0, tp);
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}
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(*linesw[tp->t_line].l_close)(tp, flag);
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if ((tp->t_cflag & HUPCL) || (tp->t_state & TS_WOPEN) ||
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!(tp->t_state & TS_ISOPEN))
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(void) dcmctl(dev, 0, DMSET);
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return (ttyclose(tp));
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}
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dcread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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{
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register struct tty *tp;
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tp = dc_tty[minor(dev)];
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return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
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}
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dcwrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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{
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register struct tty *tp;
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tp = dc_tty[minor(dev)];
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return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
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}
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struct tty *
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dctty(dev)
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dev_t dev;
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{
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struct tty *tp = dc_tty [minor (dev)];
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return (tp);
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}
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/*ARGSUSED*/
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dcioctl(dev, cmd, data, flag, p)
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dev_t dev;
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int cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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register struct tty *tp;
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register int unit = minor(dev);
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register int dc = unit >> 2;
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int error;
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tp = dc_tty[unit];
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error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
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if (error >= 0)
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return (error);
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error = ttioctl(tp, cmd, data, flag, p);
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if (error >= 0)
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return (error);
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switch (cmd) {
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case TIOCSBRK:
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dc_brk[dc] |= 1 << ((unit & 03) + 8);
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ttyoutput(0, tp);
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break;
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case TIOCCBRK:
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dc_brk[dc] &= ~(1 << ((unit & 03) + 8));
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ttyoutput(0, tp);
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break;
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case TIOCSDTR:
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(void) dcmctl(dev, DML_DTR|DML_RTS, DMBIS);
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break;
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case TIOCCDTR:
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(void) dcmctl(dev, DML_DTR|DML_RTS, DMBIC);
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break;
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case TIOCMSET:
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(void) dcmctl(dev, *(int *)data, DMSET);
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break;
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case TIOCMBIS:
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(void) dcmctl(dev, *(int *)data, DMBIS);
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break;
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case TIOCMBIC:
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(void) dcmctl(dev, *(int *)data, DMBIC);
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break;
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case TIOCMGET:
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*(int *)data = dcmctl(dev, 0, DMGET);
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break;
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|
default:
|
|
return (ENOTTY);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
dcparam(tp, t)
|
|
register struct tty *tp;
|
|
register struct termios *t;
|
|
{
|
|
register dcregs *dcaddr;
|
|
register int lpr;
|
|
register int cflag = t->c_cflag;
|
|
int unit = minor(tp->t_dev);
|
|
int ospeed = ttspeedtab(t->c_ospeed, dcspeedtab);
|
|
|
|
/* check requested parameters */
|
|
if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed) ||
|
|
(cflag & CSIZE) == CS5 || (cflag & CSIZE) == CS6 ||
|
|
(vax_boardtype == -1 && t->c_ospeed == 19200))
|
|
return (EINVAL);
|
|
/* and copy to tty */
|
|
tp->t_ispeed = t->c_ispeed;
|
|
tp->t_ospeed = t->c_ospeed;
|
|
tp->t_cflag = cflag;
|
|
|
|
dcaddr = (dcregs *)dcpdma[unit].p_addr;
|
|
|
|
/*
|
|
* Handle console cases specially.
|
|
*/
|
|
if (raster_console()) {
|
|
if (unit == DCKBD_PORT) {
|
|
dcaddr->dc_lpr = LPR_RXENAB | LPR_8_BIT_CHAR |
|
|
LPR_B4800 | DCKBD_PORT;
|
|
MachEmptyWriteBuffer();
|
|
return (0);
|
|
} else if (unit == DCMOUSE_PORT) {
|
|
dcaddr->dc_lpr = LPR_RXENAB | LPR_B4800 | LPR_OPAR |
|
|
LPR_PARENB | LPR_8_BIT_CHAR | DCMOUSE_PORT;
|
|
MachEmptyWriteBuffer();
|
|
return (0);
|
|
}
|
|
} else if (tp->t_dev == cn_tab->cn_dev) {
|
|
dcaddr->dc_lpr = LPR_RXENAB | LPR_8_BIT_CHAR |
|
|
LPR_B9600 | unit;
|
|
MachEmptyWriteBuffer();
|
|
return (0);
|
|
}
|
|
if (ospeed == 0) {
|
|
(void) dcmctl(unit, 0, DMSET); /* hang up line */
|
|
return (0);
|
|
}
|
|
lpr = LPR_RXENAB | ospeed | (unit & 03);
|
|
if ((cflag & CSIZE) == CS7)
|
|
lpr |= LPR_7_BIT_CHAR;
|
|
else
|
|
lpr |= LPR_8_BIT_CHAR;
|
|
if (cflag & PARENB)
|
|
lpr |= LPR_PARENB;
|
|
if (cflag & PARODD)
|
|
lpr |= LPR_OPAR;
|
|
if (cflag & CSTOPB)
|
|
lpr |= LPR_2_STOP;
|
|
dcaddr->dc_lpr = lpr;
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check for interrupts from all devices.
|
|
*/
|
|
int
|
|
dcintr(xxxunit)
|
|
void *xxxunit;
|
|
{
|
|
register struct dc_softc *sc = xxxunit;
|
|
register dcregs *dcaddr;
|
|
register unsigned csr;
|
|
|
|
register int unit = sc->sc_dv.dv_unit;
|
|
|
|
unit <<= 2;
|
|
dcaddr = (dcregs *)dcpdma[unit].p_addr;
|
|
while ((csr = dcaddr->dc_csr) & (CSR_RDONE | CSR_TRDY)) {
|
|
if (csr & CSR_RDONE)
|
|
dcrint(unit);
|
|
if (csr & CSR_TRDY)
|
|
dcxint(dc_tty[unit + ((csr >> 8) & 03)]);
|
|
}
|
|
/* XXX check for spurious interrupts */
|
|
return 0;
|
|
}
|
|
|
|
dcrint(unit)
|
|
register int unit;
|
|
{
|
|
register dcregs *dcaddr;
|
|
register struct tty *tp;
|
|
register int c, cc;
|
|
int overrun = 0;
|
|
|
|
dcaddr = (dcregs *)dcpdma[unit].p_addr;
|
|
while ((c = dcaddr->dc_rbuf) < 0) { /* char present */
|
|
cc = c & 0xff;
|
|
tp = dc_tty[unit + ((c >> 8) & 03)];
|
|
if ((c & RBUF_OERR) && overrun == 0) {
|
|
log(LOG_WARNING, "dc%d,%d: silo overflow\n", unit >> 2,
|
|
(c >> 8) & 03);
|
|
overrun = 1;
|
|
}
|
|
/* the keyboard requires special translation */
|
|
if (tp == dc_tty[DCKBD_PORT] && raster_console()) {
|
|
#ifdef KADB
|
|
if (cc == LK_DO) {
|
|
spl0();
|
|
kdbpanic();
|
|
return;
|
|
}
|
|
#endif
|
|
#ifdef DEBUG
|
|
debugChar = cc;
|
|
#endif
|
|
if (dcDivertXInput) {
|
|
(*dcDivertXInput)(cc);
|
|
return;
|
|
}
|
|
if ((cc = kbdMapChar(cc)) < 0)
|
|
return;
|
|
#ifdef notyet
|
|
} else if (tp == dc_tty[DCMOUSE_PORT] && dcMouseButtons) {
|
|
mouseInput(cc);
|
|
return;
|
|
#endif
|
|
}
|
|
if (!(tp->t_state & TS_ISOPEN)) {
|
|
wakeup((caddr_t)&tp->t_rawq);
|
|
#ifdef PORTSELECTOR
|
|
if (!(tp->t_state & TS_WOPEN))
|
|
#endif
|
|
return;
|
|
}
|
|
if (c & RBUF_FERR)
|
|
cc |= TTY_FE;
|
|
if (c & RBUF_PERR)
|
|
cc |= TTY_PE;
|
|
(*linesw[tp->t_line].l_rint)(cc, tp);
|
|
}
|
|
DELAY(10);
|
|
}
|
|
|
|
void
|
|
dcxint(tp)
|
|
register struct tty *tp;
|
|
{
|
|
register struct pdma *dp;
|
|
register dcregs *dcaddr;
|
|
int unit = minor(tp->t_dev);
|
|
|
|
dp = &dcpdma[unit];
|
|
if (dp->p_mem < dp->p_end) {
|
|
dcaddr = (dcregs *)dp->p_addr;
|
|
dcaddr->dc_tdr = dc_brk[unit >> 2] | *dp->p_mem++;
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
return;
|
|
}
|
|
tp->t_state &= ~TS_BUSY;
|
|
if (tp->t_state & TS_FLUSH)
|
|
tp->t_state &= ~TS_FLUSH;
|
|
else {
|
|
ndflush(&tp->t_outq, dp->p_mem - (caddr_t) tp->t_outq.c_cf);
|
|
dp->p_end = dp->p_mem = tp->t_outq.c_cf;
|
|
}
|
|
if (tp->t_line)
|
|
(*linesw[tp->t_line].l_start)(tp);
|
|
else
|
|
dcstart(tp);
|
|
if (tp->t_outq.c_cc == 0 || !(tp->t_state & TS_BUSY)) {
|
|
dcaddr = (dcregs *)dp->p_addr;
|
|
dcaddr->dc_tcr &= ~(1 << (unit & 03));
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
}
|
|
}
|
|
|
|
void
|
|
dcstart(tp)
|
|
register struct tty *tp;
|
|
{
|
|
register struct pdma *dp;
|
|
register dcregs *dcaddr;
|
|
register int cc;
|
|
int s;
|
|
|
|
dp = &dcpdma[minor(tp->t_dev)];
|
|
dcaddr = (dcregs *)dp->p_addr;
|
|
s = spltty();
|
|
if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP))
|
|
goto out;
|
|
if (tp->t_outq.c_cc <= tp->t_lowat) {
|
|
if (tp->t_state & TS_ASLEEP) {
|
|
tp->t_state &= ~TS_ASLEEP;
|
|
wakeup((caddr_t)&tp->t_outq);
|
|
}
|
|
selwakeup(&tp->t_wsel);
|
|
}
|
|
if (tp->t_outq.c_cc == 0)
|
|
goto out;
|
|
/* handle console specially */
|
|
if (tp == dc_tty[DCKBD_PORT] && raster_console()) {
|
|
while (tp->t_outq.c_cc > 0) {
|
|
cc = getc(&tp->t_outq) & 0x7f;
|
|
cnputc(cc);
|
|
}
|
|
/*
|
|
* After we flush the output queue we may need to wake
|
|
* up the process that made the output.
|
|
*/
|
|
if (tp->t_outq.c_cc <= tp->t_lowat) {
|
|
if (tp->t_state & TS_ASLEEP) {
|
|
tp->t_state &= ~TS_ASLEEP;
|
|
wakeup((caddr_t)&tp->t_outq);
|
|
}
|
|
selwakeup(&tp->t_wsel);
|
|
}
|
|
goto out;
|
|
}
|
|
cc = ndqb(&tp->t_outq, 0);
|
|
if (cc == 0)
|
|
goto out;
|
|
|
|
tp->t_state |= TS_BUSY;
|
|
dp->p_end = dp->p_mem = tp->t_outq.c_cf;
|
|
dp->p_end += cc;
|
|
dcaddr->dc_tcr |= 1 << (minor(tp->t_dev) & 03);
|
|
MachEmptyWriteBuffer();
|
|
out:
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Stop output on a line.
|
|
*/
|
|
/*ARGSUSED*/
|
|
void
|
|
dcstop(tp, flag)
|
|
register struct tty *tp;
|
|
{
|
|
register struct pdma *dp;
|
|
register int s;
|
|
|
|
dp = &dcpdma[minor(tp->t_dev)];
|
|
s = spltty();
|
|
if (tp->t_state & TS_BUSY) {
|
|
dp->p_end = dp->p_mem;
|
|
if (!(tp->t_state & TS_TTSTOP))
|
|
tp->t_state |= TS_FLUSH;
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
dcmctl(dev, bits, how)
|
|
dev_t dev;
|
|
int bits, how;
|
|
{
|
|
register dcregs *dcaddr;
|
|
register int unit, mbits;
|
|
int b, s;
|
|
register int msr;
|
|
|
|
unit = minor(dev);
|
|
b = 1 << (unit & 03);
|
|
dcaddr = (dcregs *)dcpdma[unit].p_addr;
|
|
s = spltty();
|
|
/* only channel 2 has modem control (what about line 3?) */
|
|
mbits = DML_DTR | DML_DSR | DML_CAR;
|
|
switch (unit & 03) {
|
|
case 2:
|
|
mbits = 0;
|
|
if (dcaddr->dc_tcr & TCR_DTR2)
|
|
mbits |= DML_DTR;
|
|
msr = dcaddr->dc_msr;
|
|
if (msr & MSR_CD2)
|
|
mbits |= DML_CAR;
|
|
if (msr & MSR_DSR2) {
|
|
if (vax_boardtype == -1)
|
|
mbits |= DML_CAR | DML_DSR;
|
|
else
|
|
mbits |= DML_DSR;
|
|
}
|
|
break;
|
|
|
|
case 3:
|
|
if (vax_boardtype != -1) {
|
|
mbits = 0;
|
|
if (dcaddr->dc_tcr & TCR_DTR3)
|
|
mbits |= DML_DTR;
|
|
msr = dcaddr->dc_msr;
|
|
if (msr & MSR_CD3)
|
|
mbits |= DML_CAR;
|
|
if (msr & MSR_DSR3)
|
|
mbits |= DML_DSR;
|
|
}
|
|
}
|
|
switch (how) {
|
|
case DMSET:
|
|
mbits = bits;
|
|
break;
|
|
|
|
case DMBIS:
|
|
mbits |= bits;
|
|
break;
|
|
|
|
case DMBIC:
|
|
mbits &= ~bits;
|
|
break;
|
|
|
|
case DMGET:
|
|
(void) splx(s);
|
|
return (mbits);
|
|
}
|
|
switch (unit & 03) {
|
|
case 2:
|
|
if (mbits & DML_DTR)
|
|
dcaddr->dc_tcr |= TCR_DTR2;
|
|
else
|
|
dcaddr->dc_tcr &= ~TCR_DTR2;
|
|
break;
|
|
|
|
case 3:
|
|
if (vax_boardtype != -1) {
|
|
if (mbits & DML_DTR)
|
|
dcaddr->dc_tcr |= TCR_DTR3;
|
|
else
|
|
dcaddr->dc_tcr &= ~TCR_DTR3;
|
|
}
|
|
}
|
|
if ((mbits & DML_DTR) && (dcsoftCAR[unit >> 2] & b))
|
|
dc_tty[unit]->t_state |= TS_CARR_ON;
|
|
(void) splx(s);
|
|
return (mbits);
|
|
}
|
|
|
|
/*
|
|
* This is called by timeout() periodically.
|
|
* Check to see if modem status bits have changed.
|
|
*/
|
|
void
|
|
dcscan(arg)
|
|
void *arg;
|
|
{
|
|
register dcregs *dcaddr;
|
|
register struct tty *tp;
|
|
register int i, bit, car;
|
|
int s;
|
|
|
|
s = spltty();
|
|
/* only channel 2 has modem control (what about line 3?) */
|
|
dcaddr = (dcregs *)dcpdma[i = 2].p_addr;
|
|
tp = dc_tty[i];
|
|
bit = TCR_DTR2;
|
|
if (dcsoftCAR[i >> 2] & bit)
|
|
car = 1;
|
|
else
|
|
car = dcaddr->dc_msr & MSR_DSR2;
|
|
if (car) {
|
|
/* carrier present */
|
|
if (!(tp->t_state & TS_CARR_ON))
|
|
(void)(*linesw[tp->t_line].l_modem)(tp, 1);
|
|
} else if ((tp->t_state & TS_CARR_ON) &&
|
|
(*linesw[tp->t_line].l_modem)(tp, 0) == 0)
|
|
dcaddr->dc_tcr &= ~bit;
|
|
splx(s);
|
|
timeout(dcscan, (void *)0, hz);
|
|
}
|
|
|
|
/*
|
|
* ----------------------------------------------------------------------------
|
|
*
|
|
* dcGetc --
|
|
*
|
|
* Read a character from a serial line.
|
|
*
|
|
* Results:
|
|
* A character read from the serial port.
|
|
*
|
|
* Side effects:
|
|
* None.
|
|
*
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
int
|
|
dcGetc(dev)
|
|
dev_t dev;
|
|
{
|
|
register dcregs *dcaddr;
|
|
register int c;
|
|
int s;
|
|
|
|
dcaddr = (dcregs *)dcpdma[minor(dev)].p_addr;
|
|
if (!dcaddr)
|
|
return (0);
|
|
s = spltty();
|
|
for (;;) {
|
|
if (!(dcaddr->dc_csr & CSR_RDONE))
|
|
continue;
|
|
c = dcaddr->dc_rbuf;
|
|
DELAY(10);
|
|
if (((c >> 8) & 03) == (minor(dev) & 03))
|
|
break;
|
|
}
|
|
splx(s);
|
|
return (c & 0xff);
|
|
}
|
|
|
|
/*
|
|
* Send a char on a port, non interrupt driven.
|
|
*/
|
|
void
|
|
dcPutc(dev, c)
|
|
dev_t dev;
|
|
int c;
|
|
{
|
|
register dcregs *dcaddr;
|
|
register u_short tcr;
|
|
register int timeout;
|
|
int s, line;
|
|
|
|
s = spltty();
|
|
|
|
dcaddr = (dcregs *)dcpdma[minor(dev)].p_addr;
|
|
tcr = dcaddr->dc_tcr;
|
|
dcaddr->dc_tcr = tcr | (1 << minor(dev));
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
while (1) {
|
|
/*
|
|
* Wait for transmitter to be not busy.
|
|
*/
|
|
timeout = 1000000;
|
|
while (!(dcaddr->dc_csr & CSR_TRDY) && timeout > 0)
|
|
timeout--;
|
|
if (timeout == 0) {
|
|
kprintf("dcPutc: timeout waiting for CSR_TRDY\n");
|
|
break;
|
|
}
|
|
line = (dcaddr->dc_csr >> 8) & 3;
|
|
/*
|
|
* Check to be sure its the right port.
|
|
*/
|
|
if (line != minor(dev)) {
|
|
tcr |= 1 << line;
|
|
dcaddr->dc_tcr &= ~(1 << line);
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
continue;
|
|
}
|
|
/*
|
|
* Start sending the character.
|
|
*/
|
|
dcaddr->dc_tdr = dc_brk[0] | (c & 0xff);
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
/*
|
|
* Wait for character to be sent.
|
|
*/
|
|
while (1) {
|
|
/*
|
|
* cc -O bug: this code produces and infinite loop!
|
|
* while (!(dcaddr->dc_csr & CSR_TRDY))
|
|
* ;
|
|
*/
|
|
timeout = 1000000;
|
|
while (!(dcaddr->dc_csr & CSR_TRDY) && timeout > 0)
|
|
timeout--;
|
|
line = (dcaddr->dc_csr >> 8) & 3;
|
|
if (line != minor(dev)) {
|
|
tcr |= 1 << line;
|
|
dcaddr->dc_tcr &= ~(1 << line);
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
continue;
|
|
}
|
|
dcaddr->dc_tcr &= ~(1 << minor(dev));
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
/*
|
|
* Enable interrupts for other lines which became ready.
|
|
*/
|
|
if (tcr & 0xF) {
|
|
dcaddr->dc_tcr = tcr;
|
|
MachEmptyWriteBuffer();
|
|
DELAY(10);
|
|
}
|
|
|
|
splx(s);
|
|
}
|
|
#endif /* NDC */
|