1098 lines
22 KiB
C
1098 lines
22 KiB
C
/* $NetBSD: ser.c,v 1.27 1995/04/23 18:24:40 chopps Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
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* All rights reserved.
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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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* @(#)ser.c 7.12 (Berkeley) 6/27/91
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*/
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/*
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* XXX This file needs major cleanup it will never ervice more than one
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* XXX unit.
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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/device.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/malloc.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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#include <sys/queue.h>
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#include <machine/cpu.h>
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#include <amiga/amiga/device.h>
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#include <amiga/dev/serreg.h>
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#include <amiga/amiga/custom.h>
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#include <amiga/amiga/cia.h>
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#include <amiga/amiga/cc.h>
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#include <dev/cons.h>
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#include "ser.h"
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#if NSER > 0
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void serattach __P((struct device *, struct device *, void *));
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int sermatch __P((struct device *, struct cfdata *, void *));
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struct cfdriver sercd = {
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NULL, "ser", (cfmatch_t)sermatch, serattach, DV_TTY,
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sizeof(struct device), NULL, 0 };
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#ifndef SEROBUF_SIZE
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#define SEROBUF_SIZE 32
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#endif
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#ifndef SERIBUF_SIZE
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#define SERIBUF_SIZE 512
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#endif
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#define splser() spl5()
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int serstart(), serparam(), serintr(), serhwiflow();
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int ser_active;
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int ser_hasfifo;
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int nser = NSER;
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#ifdef SERCONSOLE
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int serconsole = SERCONSOLE;
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#else
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int serconsole = -1;
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#endif
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int serconsinit;
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int serdefaultrate = TTYDEF_SPEED;
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int sermajor;
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int serswflags;
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#define SWFLAGS(dev) (serswflags | (DIALOUT(dev) ? TIOCFLAG_SOFTCAR : 0))
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struct vbl_node ser_vbl_node[NSER];
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struct tty ser_cons;
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struct tty *ser_tty[NSER];
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struct speedtab serspeedtab[] = {
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0, 0,
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50, SERBRD(50),
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75, SERBRD(75),
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110, SERBRD(110),
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134, SERBRD(134),
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150, SERBRD(150),
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200, SERBRD(200),
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300, SERBRD(300),
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600, SERBRD(600),
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1200, SERBRD(1200),
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1800, SERBRD(1800),
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2400, SERBRD(2400),
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4800, SERBRD(4800),
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9600, SERBRD(9600),
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19200, SERBRD(19200),
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38400, SERBRD(38400),
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57600, SERBRD(57600),
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76800, SERBRD(76800),
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115200, SERBRD(115200),
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-1, -1
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};
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/*
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* Since this UART is not particularly bright (to put it nicely), we'll
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* have to do parity stuff on our own. This table contains the 8th bit
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* in 7bit character mode, for even parity. If you want odd parity,
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* flip the bit. (for generation of the table, see genpar.c)
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*/
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u_char even_parity[] = {
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0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
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1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
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1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
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0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
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1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
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0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
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0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
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1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
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};
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/*
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* Since we don't get interrupts for changes on the modem control line,
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* we'll have to fake them by comparing current settings to the settings
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* we remembered on last invocation.
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*/
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u_char last_ciab_pra;
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extern struct tty *constty;
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#ifdef KGDB
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#include <machine/remote-sl.h>
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extern dev_t kgdb_dev;
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extern int kgdb_rate;
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extern int kgdb_debug_init;
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#endif
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#ifdef DEBUG
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long fifoin[17];
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long fifoout[17];
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long serintrcount[16];
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long sermintcount[16];
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#endif
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void sermint __P((register int unit));
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int
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sermatch(pdp, cfp, auxp)
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struct device *pdp;
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struct cfdata *cfp;
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void *auxp;
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{
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if (matchname("ser", (char *)auxp) == 0 || cfp->cf_unit != 0)
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return(0);
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if (serconsole != 0 && amiga_realconfig == 0)
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return(0);
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return(1);
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}
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void
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serattach(pdp, dp, auxp)
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struct device *pdp, *dp;
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void *auxp;
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{
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u_short ir;
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ir = custom.intenar;
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if (serconsole == 0)
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DELAY(100000);
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ser_active |= 1;
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ser_vbl_node[0].function = (void (*) (void *)) sermint;
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add_vbl_function(&ser_vbl_node[0], SER_VBL_PRIORITY, (void *) 0);
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#ifdef KGDB
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if (kgdb_dev == makedev(sermajor, 0)) {
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if (serconsole == 0)
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kgdb_dev = NODEV; /* can't debug over console port */
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else {
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(void) serinit(0, kgdb_rate);
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serconsinit = 1; /* don't re-init in serputc */
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if (kgdb_debug_init == 0)
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printf(" kgdb enabled\n");
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else {
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/*
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* Print prefix of device name,
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* let kgdb_connect print the rest.
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*/
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printf("ser0: ");
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kgdb_connect(1);
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}
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}
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}
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#endif
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/*
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* Need to reset baud rate, etc. of next print so reset serconsinit.
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*/
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if (0 == serconsole)
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serconsinit = 0;
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if (dp)
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printf(": input fifo %d output fifo %d\n", SERIBUF_SIZE,
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SEROBUF_SIZE);
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}
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/* ARGSUSED */
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int
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seropen(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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struct tty *tp;
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int unit, error, s;
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error = 0;
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unit = SERUNIT(dev);
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if (unit >= NSER || (ser_active & (1 << unit)) == 0)
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return (ENXIO);
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s = spltty();
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if (ser_tty[unit])
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tp = ser_tty[unit];
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else
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tp = ser_tty[unit] = ttymalloc();
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tp->t_oproc = (void (*) (struct tty *)) serstart;
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tp->t_param = serparam;
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tp->t_dev = dev;
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tp->t_hwiflow = serhwiflow;
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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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if (tp->t_ispeed == 0) {
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/*
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* only when cleared do we reset to defaults.
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*/
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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 = TTYDEF_LFLAG;
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tp->t_ispeed = tp->t_ospeed = serdefaultrate;
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}
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/*
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* do these all the time
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*/
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if (serswflags & TIOCFLAG_CLOCAL)
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tp->t_cflag |= CLOCAL;
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if (serswflags & TIOCFLAG_CRTSCTS)
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tp->t_cflag |= CRTSCTS;
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if (serswflags & TIOCFLAG_MDMBUF)
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tp->t_cflag |= MDMBUF;
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serparam(tp, &tp->t_termios);
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ttsetwater(tp);
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(void)sermctl(dev, TIOCM_DTR | TIOCM_RTS, DMSET);
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if ((SWFLAGS(dev) & TIOCFLAG_SOFTCAR) ||
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(sermctl(dev, 0, DMGET) & TIOCM_CD))
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tp->t_state |= TS_CARR_ON;
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else
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tp->t_state &= ~TS_CARR_ON;
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} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0) {
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splx(s);
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return(EBUSY);
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}
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/*
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* if NONBLOCK requested, ignore carrier
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*/
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if (flag & O_NONBLOCK)
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goto done;
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/*
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* block waiting for carrier
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*/
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while ((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0) {
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tp->t_state |= TS_WOPEN;
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error = ttysleep(tp, (caddr_t)&tp->t_rawq,
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TTIPRI | PCATCH, ttopen, 0);
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if (error) {
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splx(s);
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return(error);
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}
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}
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done:
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/* This is a way to handle lost XON characters */
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if ((flag & O_TRUNC) && (tp->t_state & TS_TTSTOP)) {
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tp->t_state &= ~TS_TTSTOP;
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ttstart (tp);
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}
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splx(s);
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/*
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* Reset the tty pointer, as there could have been a dialout
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* use of the tty with a dialin open waiting.
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*/
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tp->t_dev = dev;
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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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int
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serclose(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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struct tty *tp;
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int unit;
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unit = SERUNIT(dev);
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tp = ser_tty[unit];
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(*linesw[tp->t_line].l_close)(tp, flag);
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custom.adkcon = ADKCONF_UARTBRK; /* clear break */
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#ifdef KGDB
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/*
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* do not disable interrupts if debugging
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*/
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if (dev != kgdb_dev)
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#endif
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custom.intena = INTF_RBF | INTF_TBE; /* disable interrups */
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custom.intreq = INTF_RBF | INTF_TBE; /* clear intr request */
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/*
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* If the device is closed, it's close, no matter whether we deal with
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* modem control signals nor not.
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*/
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#if 0
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if (tp->t_cflag & HUPCL || tp->t_state & TS_WOPEN ||
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(tp->t_state & TS_ISOPEN) == 0)
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#endif
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(void) sermctl(dev, 0, DMSET);
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ttyclose(tp);
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#if not_yet
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if (tp != &ser_cons) {
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remove_vbl_function(&ser_vbl_node[unit]);
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ttyfree(tp);
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ser_tty[unit] = (struct tty *) NULL;
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}
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#endif
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return (0);
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}
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int
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serread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct tty *tp;
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if ((tp = ser_tty[SERUNIT(dev)]) == NULL)
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return(ENXIO);
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return((*linesw[tp->t_line].l_read)(tp, uio, flag));
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}
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int
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serwrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct tty *tp;
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if((tp = ser_tty[SERUNIT(dev)]) == NULL)
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return(ENXIO);
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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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sertty(dev)
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dev_t dev;
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{
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return (ser_tty[SERUNIT(dev)]);
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}
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/*
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* We don't do any processing of data here, so we store the raw code
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* obtained from the uart register. In theory, 110kBaud gives you
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* 11kcps, so 16k buffer should be more than enough, interrupt
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* latency of 1s should never happen, or something is seriously
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* wrong..
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*/
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static u_short serbuf[SERIBUF_SIZE];
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static u_short *sbrpt = serbuf;
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static u_short *sbwpt = serbuf;
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static u_short sbcnt;
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static u_short sbovfl;
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/*
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* This is a replacement for the lack of a hardware fifo. 32k should be
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* enough (there's only one unit anyway, so this is not going to
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* accumulate).
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*/
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void
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ser_fastint()
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{
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/*
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* We're at RBE-level, which is higher than VBL-level which is used
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* to periodically transmit contents of this buffer up one layer,
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* so no spl-raising is necessary.
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*/
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register u_short ints, code;
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ints = custom.intreqr & INTF_RBF;
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if (ints == 0)
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return;
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/*
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* clear interrupt
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*/
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custom.intreq = ints;
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/*
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* this register contains both data and status bits!
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*/
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code = custom.serdatr;
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/*
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* check for buffer overflow.
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*/
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if (sbcnt == SERIBUF_SIZE) {
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++sbovfl;
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return;
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}
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/*
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* store in buffer
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*/
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*sbwpt++ = code;
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if (sbwpt == serbuf + SERIBUF_SIZE)
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sbwpt = serbuf;
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++sbcnt;
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if (sbcnt > SERIBUF_SIZE - 20)
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CLRRTS(ciab.pra); /* drop RTS if buffer almost full */
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}
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int
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serintr(unit)
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int unit;
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{
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int s1, s2, ovfl;
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struct tty *tp = ser_tty[unit];
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/*
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* Make sure we're not interrupted by another
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* vbl, but allow level5 ints
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*/
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s1 = spltty();
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/*
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* pass along any acumulated information
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*/
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while (sbcnt > 0 && (tp->t_state & TS_TBLOCK) == 0) {
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/*
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* no collision with ser_fastint()
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*/
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sereint(unit, *sbrpt++);
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ovfl = 0;
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/* lock against ser_fastint() */
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s2 = splser();
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sbcnt--;
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if (sbrpt == serbuf + SERIBUF_SIZE)
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sbrpt = serbuf;
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if (sbovfl != 0) {
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ovfl = sbovfl;
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sbovfl = 0;
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}
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splx(s2);
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if (ovfl != 0)
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log(LOG_WARNING, "ser0: %d ring buffer overflows.\n",
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ovfl);
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}
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if (sbcnt == 0 && (tp->t_state & TS_TBLOCK) == 0)
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SETRTS(ciab.pra); /* start accepting data again */
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splx(s1);
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}
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int
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sereint(unit, stat)
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int unit, stat;
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{
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struct tty *tp;
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u_char ch;
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int c;
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tp = ser_tty[unit];
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ch = stat & 0xff;
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c = ch;
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if ((tp->t_state & TS_ISOPEN) == 0) {
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#ifdef KGDB
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/* we don't care about parity errors */
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if (kgdb_dev == makedev(sermajor, unit) && c == FRAME_END)
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kgdb_connect(0); /* trap into kgdb */
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#endif
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return;
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}
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/*
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* Check for break and (if enabled) parity error.
|
|
*/
|
|
if ((stat & 0x1ff) == 0)
|
|
c |= TTY_FE;
|
|
else if ((tp->t_cflag & PARENB) &&
|
|
(((ch >> 7) + even_parity[ch & 0x7f]
|
|
+ !!(tp->t_cflag & PARODD)) & 1))
|
|
c |= TTY_PE;
|
|
|
|
if (stat & SERDATRF_OVRUN)
|
|
log(LOG_WARNING, "ser0: silo overflow\n");
|
|
|
|
(*linesw[tp->t_line].l_rint)(c, tp);
|
|
}
|
|
|
|
/*
|
|
* This interrupt is periodically invoked in the vertical blank
|
|
* interrupt. It's used to keep track of the modem control lines
|
|
* and (new with the fast_int code) to move accumulated data
|
|
* up into the tty layer.
|
|
*/
|
|
void
|
|
sermint(unit)
|
|
int unit;
|
|
{
|
|
struct tty *tp;
|
|
u_char stat, last, istat;
|
|
|
|
tp = ser_tty[unit];
|
|
if (!tp)
|
|
return;
|
|
|
|
if ((tp->t_state & (TS_ISOPEN | TS_WOPEN)) == 0) {
|
|
sbrpt = sbwpt = serbuf;
|
|
return;
|
|
}
|
|
/*
|
|
* empty buffer
|
|
*/
|
|
serintr(unit);
|
|
|
|
stat = ciab.pra;
|
|
last = last_ciab_pra;
|
|
last_ciab_pra = stat;
|
|
|
|
/*
|
|
* check whether any interesting signal changed state
|
|
*/
|
|
istat = stat ^ last;
|
|
|
|
if ((istat & CIAB_PRA_CD) &&
|
|
(SWFLAGS(tp->t_dev) & TIOCFLAG_SOFTCAR) == 0) {
|
|
if (ISDCD(stat))
|
|
(*linesw[tp->t_line].l_modem)(tp, 1);
|
|
else if ((*linesw[tp->t_line].l_modem)(tp, 0) == 0) {
|
|
CLRDTR(stat);
|
|
CLRRTS(stat);
|
|
ciab.pra = stat;
|
|
last_ciab_pra = stat;
|
|
}
|
|
}
|
|
if ((istat & CIAB_PRA_CTS) && (tp->t_state & TS_ISOPEN) &&
|
|
(tp->t_cflag & CRTSCTS)) {
|
|
#if 0
|
|
/* the line is up and we want to do rts/cts flow control */
|
|
if (ISCTS(stat)) {
|
|
tp->t_state &= ~TS_TTSTOP;
|
|
ttstart(tp);
|
|
/* cause tbe-int if we were stuck there */
|
|
custom.intreq = INTF_SETCLR | INTF_TBE;
|
|
} else
|
|
tp->t_state |= TS_TTSTOP;
|
|
#else
|
|
/* do this on hardware level, not with tty driver */
|
|
if (ISCTS(stat)) {
|
|
tp->t_state &= ~TS_TTSTOP;
|
|
/* cause TBE interrupt */
|
|
custom.intreq = INTF_SETCLR | INTF_TBE;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
int
|
|
serioctl(dev, cmd, data, flag, p)
|
|
dev_t dev;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
register struct tty *tp;
|
|
register int unit = SERUNIT(dev);
|
|
register int error;
|
|
|
|
tp = ser_tty[unit];
|
|
if (!tp)
|
|
return ENXIO;
|
|
|
|
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
|
|
if (error >= 0)
|
|
return(error);
|
|
|
|
error = ttioctl(tp, cmd, data, flag, p);
|
|
if (error >= 0)
|
|
return(error);
|
|
|
|
switch (cmd) {
|
|
case TIOCSBRK:
|
|
custom.adkcon = ADKCONF_SETCLR | ADKCONF_UARTBRK;
|
|
break;
|
|
|
|
case TIOCCBRK:
|
|
custom.adkcon = ADKCONF_UARTBRK;
|
|
break;
|
|
|
|
case TIOCSDTR:
|
|
(void) sermctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIS);
|
|
break;
|
|
|
|
case TIOCCDTR:
|
|
(void) sermctl(dev, TIOCM_DTR | TIOCM_RTS, DMBIC);
|
|
break;
|
|
|
|
case TIOCMSET:
|
|
(void) sermctl(dev, *(int *) data, DMSET);
|
|
break;
|
|
|
|
case TIOCMBIS:
|
|
(void) sermctl(dev, *(int *) data, DMBIS);
|
|
break;
|
|
|
|
case TIOCMBIC:
|
|
(void) sermctl(dev, *(int *) data, DMBIC);
|
|
break;
|
|
|
|
case TIOCMGET:
|
|
*(int *)data = sermctl(dev, 0, DMGET);
|
|
break;
|
|
case TIOCGFLAGS:
|
|
*(int *)data = SWFLAGS(dev);
|
|
break;
|
|
case TIOCSFLAGS:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error != 0)
|
|
return(EPERM);
|
|
|
|
serswflags = *(int *)data;
|
|
serswflags &= /* only allow valid flags */
|
|
(TIOCFLAG_SOFTCAR | TIOCFLAG_CLOCAL | TIOCFLAG_CRTSCTS);
|
|
break;
|
|
default:
|
|
return(ENOTTY);
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
int
|
|
serparam(tp, t)
|
|
struct tty *tp;
|
|
struct termios *t;
|
|
{
|
|
int cfcr, cflag, unit, ospeed;
|
|
|
|
cflag = t->c_cflag;
|
|
unit = SERUNIT(tp->t_dev);
|
|
ospeed = ttspeedtab(t->c_ospeed, serspeedtab);
|
|
|
|
if (ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed))
|
|
return(EINVAL);
|
|
|
|
/*
|
|
* copy to tty
|
|
*/
|
|
tp->t_ispeed = t->c_ispeed;
|
|
tp->t_ospeed = t->c_ospeed;
|
|
tp->t_cflag = cflag;
|
|
|
|
/*
|
|
* enable interrupts
|
|
*/
|
|
custom.intena = INTF_SETCLR | INTF_RBF | INTF_TBE;
|
|
last_ciab_pra = ciab.pra;
|
|
|
|
if (ospeed == 0)
|
|
(void)sermctl(tp->t_dev, 0, DMSET); /* hang up line */
|
|
else {
|
|
/*
|
|
* (re)enable DTR
|
|
* and set baud rate. (8 bit mode)
|
|
*/
|
|
(void)sermctl(tp->t_dev, TIOCM_DTR | TIOCM_RTS, DMSET);
|
|
custom.serper = (0 << 15) | ospeed;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
int serhwiflow(tp, flag)
|
|
struct tty *tp;
|
|
int flag;
|
|
{
|
|
#if 0
|
|
printf ("serhwiflow %d\n", flag);
|
|
#endif
|
|
if (flag)
|
|
CLRRTS(ciab.pra);
|
|
else
|
|
SETRTS(ciab.pra);
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
ser_putchar(tp, c)
|
|
struct tty *tp;
|
|
u_short c;
|
|
{
|
|
if ((tp->t_cflag & CSIZE) == CS7 || (tp->t_cflag & PARENB))
|
|
c &= 0x7f;
|
|
|
|
/*
|
|
* handle parity if necessary
|
|
*/
|
|
if (tp->t_cflag & PARENB) {
|
|
if (even_parity[c])
|
|
c |= 0x80;
|
|
if (tp->t_cflag & PARODD)
|
|
c ^= 0x80;
|
|
}
|
|
/*
|
|
* add stop bit(s)
|
|
*/
|
|
if (tp->t_cflag & CSTOPB)
|
|
c |= 0x300;
|
|
else
|
|
c |= 0x100;
|
|
|
|
custom.serdat = c;
|
|
}
|
|
|
|
|
|
static u_char ser_outbuf[SEROBUF_SIZE];
|
|
static u_char *sob_ptr = ser_outbuf, *sob_end = ser_outbuf;
|
|
|
|
void
|
|
ser_outintr()
|
|
{
|
|
struct tty *tp = ser_tty[0];
|
|
u_short c;
|
|
int s;
|
|
|
|
tp = ser_tty[0];
|
|
s = spltty();
|
|
|
|
if (tp == 0)
|
|
goto out;
|
|
|
|
if ((custom.intreqr & INTF_TBE) == 0)
|
|
goto out;
|
|
|
|
/*
|
|
* clear interrupt
|
|
*/
|
|
custom.intreq = INTF_TBE;
|
|
|
|
if (sob_ptr == sob_end) {
|
|
tp->t_state &= ~(TS_BUSY | TS_FLUSH);
|
|
if (tp->t_line)
|
|
(*linesw[tp->t_line].l_start)(tp);
|
|
else
|
|
serstart(tp);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Do hardware flow control here. if the CTS line goes down, don't
|
|
* transmit anything. That way, we'll be restarted by the periodic
|
|
* interrupt when CTS comes back up.
|
|
*/
|
|
if (ISCTS(ciab.pra))
|
|
ser_putchar(tp, *sob_ptr++);
|
|
else
|
|
CLRCTS(last_ciab_pra); /* Remember that CTS is off */
|
|
out:
|
|
splx(s);
|
|
}
|
|
|
|
int
|
|
serstart(tp)
|
|
struct tty *tp;
|
|
{
|
|
int cc, s, unit, hiwat;
|
|
|
|
hiwat = 0;
|
|
|
|
if ((tp->t_state & TS_ISOPEN) == 0)
|
|
return;
|
|
|
|
unit = SERUNIT(tp->t_dev);
|
|
|
|
s = spltty();
|
|
if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP))
|
|
goto out;
|
|
|
|
cc = tp->t_outq.c_cc;
|
|
if (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 (cc == 0 || (tp->t_state & TS_BUSY))
|
|
goto out;
|
|
|
|
/*
|
|
* We only do bulk transfers if using CTSRTS flow control, not for
|
|
* (probably sloooow) ixon/ixoff devices.
|
|
*/
|
|
if ((tp->t_cflag & CRTSCTS) == 0)
|
|
cc = 1;
|
|
|
|
/*
|
|
* Limit the amount of output we do in one burst
|
|
* to prevent hogging the CPU.
|
|
*/
|
|
if (cc > SEROBUF_SIZE) {
|
|
hiwat++;
|
|
cc = SEROBUF_SIZE;
|
|
}
|
|
cc = q_to_b(&tp->t_outq, ser_outbuf, cc);
|
|
if (cc > 0) {
|
|
tp->t_state |= TS_BUSY;
|
|
|
|
sob_ptr = ser_outbuf;
|
|
sob_end = ser_outbuf + cc;
|
|
|
|
/*
|
|
* Get first character out, then have TBE-interrupts blow out
|
|
* further characters, until buffer is empty, and TS_BUSY gets
|
|
* cleared.
|
|
*/
|
|
ser_putchar(tp, *sob_ptr++);
|
|
}
|
|
out:
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Stop output on a line.
|
|
*/
|
|
/*ARGSUSED*/
|
|
int
|
|
serstop(tp, flag)
|
|
struct tty *tp;
|
|
{
|
|
int s;
|
|
|
|
s = spltty();
|
|
if (tp->t_state & TS_BUSY) {
|
|
if ((tp->t_state & TS_TTSTOP) == 0)
|
|
tp->t_state |= TS_FLUSH;
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
int
|
|
sermctl(dev, bits, how)
|
|
dev_t dev;
|
|
int bits, how;
|
|
{
|
|
int unit, s;
|
|
u_char ub;
|
|
|
|
unit = SERUNIT(dev);
|
|
|
|
/*
|
|
* convert TIOCM* mask into CIA mask
|
|
* which is active low
|
|
*/
|
|
if (how != DMGET) {
|
|
ub = 0;
|
|
if (bits & TIOCM_DTR)
|
|
ub |= CIAB_PRA_DTR;
|
|
if (bits & TIOCM_RTS)
|
|
ub |= CIAB_PRA_RTS;
|
|
if (bits & TIOCM_CTS)
|
|
ub |= CIAB_PRA_CTS;
|
|
if (bits & TIOCM_CD)
|
|
ub |= CIAB_PRA_CD;
|
|
if (bits & TIOCM_RI)
|
|
ub |= CIAB_PRA_SEL; /* collision with /dev/par ! */
|
|
if (bits & TIOCM_DSR)
|
|
ub |= CIAB_PRA_DSR;
|
|
}
|
|
s = spltty();
|
|
switch (how) {
|
|
case DMSET:
|
|
/* invert and set */
|
|
ciab.pra = ~ub;
|
|
break;
|
|
|
|
case DMBIC:
|
|
ciab.pra |= ub;
|
|
ub = ~ciab.pra;
|
|
break;
|
|
|
|
case DMBIS:
|
|
ciab.pra &= ~ub;
|
|
ub = ~ciab.pra;
|
|
break;
|
|
|
|
case DMGET:
|
|
ub = ~ciab.pra;
|
|
break;
|
|
}
|
|
(void)splx(s);
|
|
|
|
bits = 0;
|
|
if (ub & CIAB_PRA_DTR)
|
|
bits |= TIOCM_DTR;
|
|
if (ub & CIAB_PRA_RTS)
|
|
bits |= TIOCM_RTS;
|
|
if (ub & CIAB_PRA_CTS)
|
|
bits |= TIOCM_CTS;
|
|
if (ub & CIAB_PRA_CD)
|
|
bits |= TIOCM_CD;
|
|
if (ub & CIAB_PRA_SEL)
|
|
bits |= TIOCM_RI;
|
|
if (ub & CIAB_PRA_DSR)
|
|
bits |= TIOCM_DSR;
|
|
|
|
return(bits);
|
|
}
|
|
|
|
/*
|
|
* Following are all routines needed for SER to act as console
|
|
*/
|
|
int
|
|
sercnprobe(cp)
|
|
struct consdev *cp;
|
|
{
|
|
int unit = CONUNIT;
|
|
|
|
/* locate the major number */
|
|
for (sermajor = 0; sermajor < nchrdev; sermajor++)
|
|
if (cdevsw[sermajor].d_open == (void *)seropen)
|
|
break;
|
|
|
|
|
|
unit = CONUNIT; /* XXX: ick */
|
|
|
|
/*
|
|
* initialize required fields
|
|
*/
|
|
cp->cn_dev = makedev(sermajor, unit);
|
|
if (serconsole == unit)
|
|
cp->cn_pri = CN_REMOTE;
|
|
else
|
|
cp->cn_pri = CN_NORMAL;
|
|
#ifdef KGDB
|
|
if (major(kgdb_dev) == 1) /* XXX */
|
|
kgdb_dev = makedev(sermajor, minor(kgdb_dev));
|
|
#endif
|
|
}
|
|
|
|
sercninit(cp)
|
|
struct consdev *cp;
|
|
{
|
|
int unit;
|
|
|
|
unit = SERUNIT(cp->cn_dev);
|
|
|
|
serinit(unit, serdefaultrate);
|
|
serconsole = unit;
|
|
serconsinit = 1;
|
|
}
|
|
|
|
serinit(unit, rate)
|
|
int unit, rate;
|
|
{
|
|
int s;
|
|
|
|
s = splser();
|
|
/*
|
|
* might want to fiddle with the CIA later ???
|
|
*/
|
|
custom.serper = ttspeedtab(rate, serspeedtab);
|
|
splx(s);
|
|
}
|
|
|
|
sercngetc(dev)
|
|
{
|
|
u_short stat;
|
|
int c, s;
|
|
|
|
s = splser();
|
|
/*
|
|
* poll
|
|
*/
|
|
while (((stat = custom.serdatr & 0xffff) & SERDATRF_RBF) == 0)
|
|
;
|
|
c = stat & 0xff;
|
|
/*
|
|
* clear interrupt
|
|
*/
|
|
custom.intreq = INTF_RBF;
|
|
splx(s);
|
|
return(c);
|
|
}
|
|
|
|
/*
|
|
* Console kernel output character routine.
|
|
*/
|
|
sercnputc(dev, c)
|
|
dev_t dev;
|
|
int c;
|
|
{
|
|
register int timo;
|
|
short stat;
|
|
int s;
|
|
|
|
s = splhigh();
|
|
|
|
if (serconsinit == 0) {
|
|
(void)serinit(SERUNIT(dev), serdefaultrate);
|
|
serconsinit = 1;
|
|
}
|
|
|
|
/*
|
|
* wait for any pending transmission to finish
|
|
*/
|
|
timo = 50000;
|
|
while (!(custom.serdatr & SERDATRF_TBE) && --timo);
|
|
|
|
/*
|
|
* transmit char.
|
|
*/
|
|
custom.serdat = (c & 0xff) | 0x100;
|
|
|
|
/*
|
|
* wait for this transmission to complete
|
|
*/
|
|
timo = 1500000;
|
|
while (!(custom.serdatr & SERDATRF_TBE) && --timo)
|
|
;
|
|
|
|
/*
|
|
* Wait for the device (my vt100..) to process the data, since we
|
|
* don't do flow-control with cnputc
|
|
*/
|
|
for (timo = 0; timo < 30000; timo++)
|
|
;
|
|
|
|
/*
|
|
* clear any interrupts generated by this transmission
|
|
*/
|
|
custom.intreq = INTF_TBE;
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
sercnpollc(dev, on)
|
|
dev_t dev;
|
|
int on;
|
|
{
|
|
}
|
|
#endif
|