1433 lines
30 KiB
C
1433 lines
30 KiB
C
/* $NetBSD: ser.c,v 1.5 1998/07/04 22:18:22 jonathan Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Leo Weppelman.
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*
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* The driver structure is based on the i386 com-driver from Charles M. Hannum.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "opt_ddb.h"
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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/select.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/user.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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#include <sys/types.h>
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#include <sys/device.h>
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#include <m68k/asm_single.h>
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#include <machine/iomap.h>
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#include <machine/mfp.h>
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#include <atari/atari/intr.h>
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#include <atari/dev/ym2149reg.h>
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#include <atari/dev/serreg.h>
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/* #define SER_DEBUG */
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#define SERUNIT(x) (minor(x) & 0x7ffff)
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#define SERDIALOUT(x) (minor(x) & 0x80000)
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/* XXX */
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#define CONSBAUD 9600
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#define CONSCFLAG TTYDEF_CFLAG
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/* end XXX */
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/* Macros to clear/set/test flags. */
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#define SET(t, f) (t) |= (f)
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#define CLR(t, f) (t) &= ~(f)
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#define ISSET(t, f) ((t) & (f))
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#define splserial() spl6()
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/* Buffer size for character buffer */
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#define RXBUFSIZE 2048 /* More than enough.. */
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#define RXBUFMASK (RXBUFSIZE-1) /* Only iff previous is a power of 2 */
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#define RXHIWAT (RXBUFSIZE >> 2)
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struct ser_softc {
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struct device sc_dev;
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struct tty *sc_tty;
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int sc_overflows;
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int sc_floods;
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int sc_errors;
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u_char sc_hwflags;
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u_char sc_swflags;
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int sc_ospeed; /* delay + timer-d data */
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u_char sc_imra;
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u_char sc_imrb;
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u_char sc_ucr; /* Uart control */
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u_char sc_msr; /* Modem status */
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u_char sc_tsr; /* Tranceiver status */
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u_char sc_rsr; /* Receiver status */
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u_char sc_mcr; /* (Pseudo) Modem ctrl. */
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u_char sc_msr_delta;
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u_char sc_msr_mask;
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u_char sc_mcr_active;
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u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd;
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int sc_r_hiwat;
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volatile u_int sc_rbget;
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volatile u_int sc_rbput;
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volatile u_int sc_rbavail;
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u_char sc_rbuf[RXBUFSIZE];
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u_char sc_lbuf[RXBUFSIZE];
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volatile u_char sc_rx_blocked;
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volatile u_char sc_rx_ready;
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volatile u_char sc_tx_busy;
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volatile u_char sc_tx_done;
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volatile u_char sc_tx_stopped;
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volatile u_char sc_st_check;
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u_char *sc_tba;
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int sc_tbc;
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int sc_heldtbc;
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volatile u_char sc_heldchange;
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};
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/*
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* For sc_hwflags:
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*/
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#define SER_HW_CONSOLE 0x01
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cdev_decl(ser);
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void ser_break __P((struct ser_softc *, int));
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void ser_hwiflow __P((struct ser_softc *, int));
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void ser_iflush __P((struct ser_softc *));
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void ser_loadchannelregs __P((struct ser_softc *));
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void ser_modem __P((struct ser_softc *, int));
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void serdiag __P((void *));
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int serhwiflow __P((struct tty *, int));
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void serinit __P((int));
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void serinitcons __P((int));
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int baud;
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int sermintr __P((void *));
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int sertrintr __P((void *));
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int serparam __P((struct tty *, struct termios *));
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void serstart __P((struct tty *));
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struct consdev;
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void sercnprobe __P((struct consdev *));
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void sercninit __P((struct consdev *));
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int sercngetc __P((dev_t));
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void sercnputc __P((dev_t, int));
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void sercnpollc __P((dev_t, int));
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static void sermsrint __P((struct ser_softc *, struct tty*));
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static void serrxint __P((struct ser_softc *, struct tty*));
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static void ser_shutdown __P((struct ser_softc *));
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static int serspeed __P((long));
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static void sersoft __P((void *));
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static void sertxint __P((struct ser_softc *, struct tty*));
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static volatile int ser_softintr_scheduled = 0;
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static int sermajor;
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/*
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* Autoconfig stuff
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*/
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static void serattach __P((struct device *, struct device *, void *));
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static int sermatch __P((struct device *, struct cfdata *, void *));
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struct cfattach ser_ca = {
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sizeof(struct ser_softc), sermatch, serattach
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};
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extern struct cfdriver ser_cd;
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/*ARGSUSED*/
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static 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 (!strcmp((char *)auxp, "ser") && cfp->cf_unit == 0)
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return (1);
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return (0);
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}
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/*ARGSUSED*/
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static 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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struct ser_softc *sc = (void *)dp;
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if (intr_establish(1, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL)
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printf("serattach: Can't establish interrupt (1)\n");
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if (intr_establish(2, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL)
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printf("serattach: Can't establish interrupt (2)\n");
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if (intr_establish(14, USER_VEC, 0, (hw_ifun_t)sermintr, sc) == NULL)
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printf("serattach: Can't establish interrupt (14)\n");
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if (intr_establish(9, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL)
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printf("serattach: Can't establish interrupt (9)\n");
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if (intr_establish(10, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL)
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printf("serattach: Can't establish interrupt (10)\n");
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if (intr_establish(11, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL)
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printf("serattach: Can't establish interrupt (11)\n");
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if (intr_establish(12, USER_VEC, 0, (hw_ifun_t)sertrintr, sc) == NULL)
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printf("serattach: Can't establish interrupt (12)\n");
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ym2149_rts(1);
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ym2149_dtr(1);
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/*
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* Enable but mask interrupts...
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* XXX: Look at edge-sensitivity for DCD/CTS interrupts.
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*/
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MFP->mf_ierb |= IB_SCTS|IB_SDCD;
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MFP->mf_iera |= IA_RRDY|IA_RERR|IA_TRDY|IA_TERR;
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MFP->mf_imrb &= ~(IB_SCTS|IB_SDCD);
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MFP->mf_imra &= ~(IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
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#ifdef SERCONSOLE
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/*
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* Activate serial console when DCD present...
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*/
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if (!(MFP->mf_gpip & MCR_DCD))
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SET(sc->sc_hwflags, SER_HW_CONSOLE);
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#endif /* SERCONSOLE */
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printf("\n");
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if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) {
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serinit(CONSBAUD);
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printf("%s: console\n", sc->sc_dev.dv_xname);
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}
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}
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#ifdef SER_DEBUG
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void serstatus __P((struct ser_softc *, char *));
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void
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serstatus(sc, str)
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struct ser_softc *sc;
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char *str;
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{
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struct tty *tp = sc->sc_tty;
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printf("%s: %s %sclocal %sdcd %sts_carr_on %sdtr %stx_stopped\n",
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sc->sc_dev.dv_xname, str,
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ISSET(tp->t_cflag, CLOCAL) ? "+" : "-",
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ISSET(sc->sc_msr, MCR_DCD) ? "+" : "-",
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ISSET(tp->t_state, TS_CARR_ON) ? "+" : "-",
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ISSET(sc->sc_mcr, MCR_DTR) ? "+" : "-",
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sc->sc_tx_stopped ? "+" : "-");
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printf("%s: %s %scrtscts %scts %sts_ttstop %srts %srx_blocked\n",
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sc->sc_dev.dv_xname, str,
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ISSET(tp->t_cflag, CRTSCTS) ? "+" : "-",
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ISSET(sc->sc_msr, MCR_CTS) ? "+" : "-",
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ISSET(tp->t_state, TS_TTSTOP) ? "+" : "-",
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ISSET(sc->sc_mcr, MCR_RTS) ? "+" : "-",
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sc->sc_rx_blocked ? "+" : "-");
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}
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#endif /* SER_DEBUG */
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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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int unit = SERUNIT(dev);
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struct ser_softc *sc;
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struct tty *tp;
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int s, s2;
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int error = 0;
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if (unit >= ser_cd.cd_ndevs)
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return (ENXIO);
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sc = ser_cd.cd_devs[unit];
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if (!sc)
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return (ENXIO);
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if (!sc->sc_tty) {
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tp = sc->sc_tty = ttymalloc();
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tty_attach(tp);
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} else
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tp = sc->sc_tty;
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if (ISSET(tp->t_state, TS_ISOPEN) &&
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ISSET(tp->t_state, TS_XCLUDE) &&
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p->p_ucred->cr_uid != 0)
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return (EBUSY);
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s = spltty();
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/*
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* Do the following if this is a first open.
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*/
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if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
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struct termios t;
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/* Turn on interrupts. */
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sc->sc_imra = IA_RRDY|IA_RERR|IA_TRDY|IA_TERR;
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sc->sc_imrb = IB_SCTS|IB_SDCD;
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single_inst_bset_b(MFP->mf_imra, sc->sc_imra);
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single_inst_bset_b(MFP->mf_imrb, sc->sc_imrb);
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/* Fetch the current modem control status, needed later. */
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sc->sc_msr = ~MFP->mf_gpip & (IO_SDCD|IO_SCTS|IO_SRI);
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/* Add some entry points needed by the tty layer. */
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tp->t_oproc = serstart;
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tp->t_param = serparam;
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tp->t_hwiflow = serhwiflow;
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tp->t_dev = dev;
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/*
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* Initialize the termios status to the defaults. Add in the
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* sticky bits from TIOCSFLAGS.
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*/
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t.c_ispeed = 0;
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if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) {
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t.c_ospeed = CONSBAUD;
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t.c_cflag = CONSCFLAG;
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}
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else {
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t.c_ospeed = TTYDEF_SPEED;
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t.c_cflag = TTYDEF_CFLAG;
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}
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if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
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SET(t.c_cflag, CLOCAL);
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if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
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SET(t.c_cflag, CRTSCTS);
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if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
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SET(t.c_cflag, MDMBUF);
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_lflag = TTYDEF_LFLAG;
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ttychars(tp);
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(void) serparam(tp, &t);
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ttsetwater(tp);
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s2 = splserial();
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/*
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* Turn on DTR. We must always do this, even if carrier is not
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* present, because otherwise we'd have to use TIOCSDTR
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* immediately after setting CLOCAL. We will drop DTR only on
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* the next high-low transition of DCD, or by explicit request.
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*/
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ser_modem(sc, 1);
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/* Clear the input ring, and unblock. */
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sc->sc_rbput = sc->sc_rbget = 0;
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sc->sc_rbavail = RXBUFSIZE;
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ser_iflush(sc);
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sc->sc_rx_blocked = 0;
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ser_hwiflow(sc, 0);
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#ifdef SER_DEBUG
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serstatus(sc, "seropen ");
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#endif
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splx(s2);
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}
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splx(s);
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error = ttyopen(tp, SERDIALOUT(dev), ISSET(flag, O_NONBLOCK));
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if (error)
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goto bad;
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error = (*linesw[tp->t_line].l_open)(dev, tp);
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if (error)
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goto bad;
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return (0);
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bad:
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if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
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/*
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* We failed to open the device, and nobody else had it opened.
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* Clean up the state as appropriate.
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*/
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ser_shutdown(sc);
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}
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return (error);
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}
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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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int unit = SERUNIT(dev);
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struct ser_softc *sc = ser_cd.cd_devs[unit];
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struct tty *tp = sc->sc_tty;
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/* XXX This is for cons.c. */
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if (!ISSET(tp->t_state, TS_ISOPEN))
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return (0);
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(*linesw[tp->t_line].l_close)(tp, flag);
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ttyclose(tp);
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if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
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/*
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* Although we got a last close, the device may still be in
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* use; e.g. if this was the dialout node, and there are still
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* processes waiting for carrier on the non-dialout node.
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*/
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ser_shutdown(sc);
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}
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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 ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)];
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struct tty *tp = sc->sc_tty;
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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 ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)];
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struct tty *tp = sc->sc_tty;
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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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struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(dev)];
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struct tty *tp = sc->sc_tty;
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return (tp);
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}
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int
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serioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long 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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int unit = SERUNIT(dev);
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struct ser_softc *sc = ser_cd.cd_devs[unit];
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struct tty *tp = sc->sc_tty;
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int error;
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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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ser_break(sc, 1);
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break;
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case TIOCCBRK:
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ser_break(sc, 0);
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break;
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case TIOCSDTR:
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|
ser_modem(sc, 1);
|
|
break;
|
|
|
|
case TIOCCDTR:
|
|
ser_modem(sc, 0);
|
|
break;
|
|
|
|
case TIOCGFLAGS:
|
|
*(int *)data = sc->sc_swflags;
|
|
break;
|
|
|
|
case TIOCSFLAGS:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
sc->sc_swflags = *(int *)data;
|
|
break;
|
|
|
|
case TIOCMSET:
|
|
case TIOCMBIS:
|
|
case TIOCMBIC:
|
|
case TIOCMGET:
|
|
default:
|
|
return (ENOTTY);
|
|
}
|
|
|
|
#ifdef SER_DEBUG
|
|
serstatus(sc, "serioctl ");
|
|
#endif
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
ser_break(sc, onoff)
|
|
struct ser_softc *sc;
|
|
int onoff;
|
|
{
|
|
int s;
|
|
|
|
s = splserial();
|
|
if (onoff)
|
|
SET(sc->sc_tsr, TSR_SBREAK);
|
|
else
|
|
CLR(sc->sc_tsr, TSR_SBREAK);
|
|
|
|
if (!sc->sc_heldchange) {
|
|
if (sc->sc_tx_busy) {
|
|
sc->sc_heldtbc = sc->sc_tbc;
|
|
sc->sc_tbc = 0;
|
|
sc->sc_heldchange = 1;
|
|
} else
|
|
ser_loadchannelregs(sc);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
ser_modem(sc, onoff)
|
|
struct ser_softc *sc;
|
|
int onoff;
|
|
{
|
|
int s;
|
|
|
|
s = splserial();
|
|
if (onoff)
|
|
SET(sc->sc_mcr, sc->sc_mcr_dtr);
|
|
else
|
|
CLR(sc->sc_mcr, sc->sc_mcr_dtr);
|
|
|
|
if (!sc->sc_heldchange) {
|
|
if (sc->sc_tx_busy) {
|
|
sc->sc_heldtbc = sc->sc_tbc;
|
|
sc->sc_tbc = 0;
|
|
sc->sc_heldchange = 1;
|
|
} else
|
|
ser_loadchannelregs(sc);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
int
|
|
serparam(tp, t)
|
|
struct tty *tp;
|
|
struct termios *t;
|
|
{
|
|
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)];
|
|
int ospeed = serspeed(t->c_ospeed);
|
|
u_char ucr;
|
|
int s;
|
|
|
|
/* check requested parameters */
|
|
if (ospeed < 0)
|
|
return (EINVAL);
|
|
if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
|
|
return (EINVAL);
|
|
|
|
sc->sc_rsr = RSR_ENAB;
|
|
sc->sc_tsr = TSR_ENAB;
|
|
|
|
ucr = UCR_CLKDIV;
|
|
|
|
switch (ISSET(t->c_cflag, CSIZE)) {
|
|
case CS5:
|
|
SET(ucr, UCR_5BITS);
|
|
break;
|
|
case CS6:
|
|
SET(ucr, UCR_6BITS);
|
|
break;
|
|
case CS7:
|
|
SET(ucr, UCR_7BITS);
|
|
break;
|
|
case CS8:
|
|
SET(ucr, UCR_8BITS);
|
|
break;
|
|
}
|
|
if (ISSET(t->c_cflag, PARENB)) {
|
|
SET(ucr, UCR_PENAB);
|
|
if (!ISSET(t->c_cflag, PARODD))
|
|
SET(ucr, UCR_PEVEN);
|
|
}
|
|
if (ISSET(t->c_cflag, CSTOPB))
|
|
SET(ucr, UCR_STOPB2);
|
|
else
|
|
SET(ucr, UCR_STOPB1);
|
|
|
|
s = splserial();
|
|
|
|
sc->sc_ucr = ucr;
|
|
|
|
/*
|
|
* For the console, always force CLOCAL and !HUPCL, so that the port
|
|
* is always active.
|
|
*/
|
|
if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) ||
|
|
ISSET(sc->sc_hwflags, SER_HW_CONSOLE)) {
|
|
SET(t->c_cflag, CLOCAL);
|
|
CLR(t->c_cflag, HUPCL);
|
|
}
|
|
|
|
/*
|
|
* If we're not in a mode that assumes a connection is present, then
|
|
* ignore carrier changes.
|
|
*/
|
|
if (ISSET(t->c_cflag, CLOCAL | MDMBUF))
|
|
sc->sc_msr_dcd = 0;
|
|
else
|
|
sc->sc_msr_dcd = MCR_DCD;
|
|
/*
|
|
* Set the flow control pins depending on the current flow control
|
|
* mode.
|
|
*/
|
|
if (ISSET(t->c_cflag, CRTSCTS)) {
|
|
sc->sc_mcr_dtr = MCR_DTR;
|
|
sc->sc_mcr_rts = MCR_RTS;
|
|
sc->sc_msr_cts = MCR_CTS;
|
|
sc->sc_r_hiwat = RXHIWAT;
|
|
} else if (ISSET(t->c_cflag, MDMBUF)) {
|
|
/*
|
|
* For DTR/DCD flow control, make sure we don't toggle DTR for
|
|
* carrier detection.
|
|
*/
|
|
sc->sc_mcr_dtr = 0;
|
|
sc->sc_mcr_rts = MCR_DTR;
|
|
sc->sc_msr_cts = MCR_DCD;
|
|
sc->sc_r_hiwat = RXHIWAT;
|
|
} else {
|
|
/*
|
|
* If no flow control, then always set RTS. This will make
|
|
* the other side happy if it mistakenly thinks we're doing
|
|
* RTS/CTS flow control.
|
|
*/
|
|
sc->sc_mcr_dtr = MCR_DTR | MCR_RTS;
|
|
sc->sc_mcr_rts = 0;
|
|
sc->sc_msr_cts = 0;
|
|
sc->sc_r_hiwat = 0;
|
|
if (ISSET(sc->sc_mcr, MCR_DTR))
|
|
SET(sc->sc_mcr, MCR_RTS);
|
|
else
|
|
CLR(sc->sc_mcr, MCR_RTS);
|
|
}
|
|
sc->sc_msr_mask = sc->sc_msr_cts | sc->sc_msr_dcd;
|
|
|
|
#if 0
|
|
if (ospeed == 0)
|
|
CLR(sc->sc_mcr, sc->sc_mcr_dtr);
|
|
else
|
|
SET(sc->sc_mcr, sc->sc_mcr_dtr);
|
|
#endif
|
|
|
|
sc->sc_ospeed = ospeed;
|
|
|
|
/* and copy to tty */
|
|
tp->t_ispeed = 0;
|
|
tp->t_ospeed = t->c_ospeed;
|
|
tp->t_cflag = t->c_cflag;
|
|
|
|
if (!sc->sc_heldchange) {
|
|
if (sc->sc_tx_busy) {
|
|
sc->sc_heldtbc = sc->sc_tbc;
|
|
sc->sc_tbc = 0;
|
|
sc->sc_heldchange = 1;
|
|
} else
|
|
ser_loadchannelregs(sc);
|
|
}
|
|
|
|
splx(s);
|
|
|
|
/*
|
|
* Update the tty layer's idea of the carrier bit, in case we changed
|
|
* CLOCAL or MDMBUF. We don't hang up here; we only do that if we
|
|
* lose carrier while carrier detection is on.
|
|
*/
|
|
(void) (*linesw[tp->t_line].l_modem)(tp, ISSET(sc->sc_msr, MCR_DCD));
|
|
|
|
#ifdef SER_DEBUG
|
|
serstatus(sc, "serparam ");
|
|
#endif
|
|
|
|
/* XXXXX FIX ME */
|
|
/* Block or unblock as needed. */
|
|
if (!ISSET(t->c_cflag, CHWFLOW)) {
|
|
if (sc->sc_rx_blocked) {
|
|
sc->sc_rx_blocked = 0;
|
|
ser_hwiflow(sc, 0);
|
|
}
|
|
if (sc->sc_tx_stopped) {
|
|
sc->sc_tx_stopped = 0;
|
|
serstart(tp);
|
|
}
|
|
} else {
|
|
#if 0
|
|
sermsrint(sc, tp);
|
|
#endif
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
ser_iflush(sc)
|
|
struct ser_softc *sc;
|
|
{
|
|
u_char tmp;
|
|
|
|
/* flush any pending I/O */
|
|
while (ISSET(MFP->mf_rsr, RSR_CIP|RSR_BFULL))
|
|
tmp = MFP->mf_udr;
|
|
}
|
|
|
|
void
|
|
ser_loadchannelregs(sc)
|
|
struct ser_softc *sc;
|
|
{
|
|
/* XXXXX necessary? */
|
|
ser_iflush(sc);
|
|
|
|
/*
|
|
* No interrupts please...
|
|
*/
|
|
if((MFP->mf_imra & (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR)) != sc->sc_imra) {
|
|
printf("loadchannelregs: mf_imra: %x sc_imra: %x\n", (u_int)MFP->mf_imra,
|
|
(u_int)sc->sc_imra);
|
|
}
|
|
if((MFP->mf_imrb & (IB_SCTS|IB_SDCD)) != sc->sc_imrb) {
|
|
printf("loadchannelregs: mf_imrb: %x sc_imrb: %x\n", (u_int)MFP->mf_imrb,
|
|
(u_int)sc->sc_imrb);
|
|
}
|
|
single_inst_bclr_b(MFP->mf_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
|
|
single_inst_bclr_b(MFP->mf_imrb, IB_SCTS|IB_SDCD);
|
|
|
|
MFP->mf_ucr = sc->sc_ucr;
|
|
MFP->mf_rsr = sc->sc_rsr;
|
|
MFP->mf_tsr = sc->sc_tsr;
|
|
|
|
single_inst_bclr_b(MFP->mf_tcdcr, 0x07);
|
|
MFP->mf_tddr = sc->sc_ospeed;
|
|
single_inst_bset_b(MFP->mf_tcdcr, (sc->sc_ospeed >> 8) & 0x0f);
|
|
|
|
sc->sc_mcr_active = sc->sc_mcr;
|
|
|
|
if (machineid & ATARI_HADES) {
|
|
/* PCB fault, wires exchanged..... */
|
|
ym2149_rts(!(sc->sc_mcr_active & MCR_DTR));
|
|
ym2149_dtr(!(sc->sc_mcr_active & MCR_RTS));
|
|
}
|
|
else {
|
|
ym2149_rts(!(sc->sc_mcr_active & MCR_RTS));
|
|
ym2149_dtr(!(sc->sc_mcr_active & MCR_DTR));
|
|
}
|
|
|
|
single_inst_bset_b(MFP->mf_imra, sc->sc_imra);
|
|
single_inst_bset_b(MFP->mf_imrb, sc->sc_imrb);
|
|
}
|
|
|
|
int
|
|
serhwiflow(tp, block)
|
|
struct tty *tp;
|
|
int block;
|
|
{
|
|
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)];
|
|
int s;
|
|
|
|
if (sc->sc_mcr_rts == 0)
|
|
return (0);
|
|
|
|
s = splserial();
|
|
if (block) {
|
|
/*
|
|
* The tty layer is asking us to block input.
|
|
* If we already did it, just return TRUE.
|
|
*/
|
|
if (sc->sc_rx_blocked)
|
|
goto out;
|
|
sc->sc_rx_blocked = 1;
|
|
} else {
|
|
/*
|
|
* The tty layer is asking us to resume input.
|
|
* The input ring is always empty by now.
|
|
*/
|
|
sc->sc_rx_blocked = 0;
|
|
}
|
|
ser_hwiflow(sc, block);
|
|
out:
|
|
splx(s);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* (un)block input via hw flowcontrol
|
|
*/
|
|
void
|
|
ser_hwiflow(sc, block)
|
|
struct ser_softc *sc;
|
|
int block;
|
|
{
|
|
if (sc->sc_mcr_rts == 0)
|
|
return;
|
|
|
|
if (block) {
|
|
CLR(sc->sc_mcr, sc->sc_mcr_rts);
|
|
CLR(sc->sc_mcr_active, sc->sc_mcr_rts);
|
|
} else {
|
|
SET(sc->sc_mcr, sc->sc_mcr_rts);
|
|
SET(sc->sc_mcr_active, sc->sc_mcr_rts);
|
|
}
|
|
if (machineid & ATARI_HADES) {
|
|
/* PCB fault, wires exchanged..... */
|
|
ym2149_dtr(sc->sc_mcr_active & MCR_RTS);
|
|
}
|
|
else {
|
|
ym2149_rts(sc->sc_mcr_active & MCR_RTS);
|
|
}
|
|
}
|
|
|
|
void
|
|
serstart(tp)
|
|
struct tty *tp;
|
|
{
|
|
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)];
|
|
int s;
|
|
|
|
s = spltty();
|
|
if (ISSET(tp->t_state, TS_BUSY))
|
|
goto out;
|
|
if (ISSET(tp->t_state, TS_TIMEOUT | TS_TTSTOP))
|
|
goto stopped;
|
|
|
|
if (sc->sc_tx_stopped)
|
|
goto stopped;
|
|
|
|
if (tp->t_outq.c_cc <= tp->t_lowat) {
|
|
if (ISSET(tp->t_state, TS_ASLEEP)) {
|
|
CLR(tp->t_state, TS_ASLEEP);
|
|
wakeup(&tp->t_outq);
|
|
}
|
|
selwakeup(&tp->t_wsel);
|
|
if (tp->t_outq.c_cc == 0)
|
|
goto stopped;
|
|
}
|
|
|
|
/* Grab the first contiguous region of buffer space. */
|
|
{
|
|
u_char *tba;
|
|
int tbc;
|
|
|
|
tba = tp->t_outq.c_cf;
|
|
tbc = ndqb(&tp->t_outq, 0);
|
|
|
|
(void)splserial();
|
|
|
|
sc->sc_tba = tba;
|
|
sc->sc_tbc = tbc;
|
|
}
|
|
|
|
SET(tp->t_state, TS_BUSY);
|
|
sc->sc_tx_busy = 1;
|
|
|
|
/* Enable transmit completion interrupts if necessary. */
|
|
if (!ISSET(sc->sc_imra, IA_TRDY)) {
|
|
SET(sc->sc_imra, IA_TRDY|IA_TERR);
|
|
single_inst_bset_b(MFP->mf_imra, IA_TRDY|IA_TERR);
|
|
}
|
|
|
|
/* Output the first char */
|
|
MFP->mf_udr = *sc->sc_tba;
|
|
sc->sc_tbc --;
|
|
sc->sc_tba ++;
|
|
|
|
splx(s);
|
|
return;
|
|
|
|
stopped:
|
|
/* Disable transmit completion interrupts if necessary. */
|
|
if (ISSET(sc->sc_imra, IA_TRDY)) {
|
|
CLR(sc->sc_imra, IA_TRDY|IA_TERR);
|
|
single_inst_bclr_b(MFP->mf_imra, IA_TRDY|IA_TERR);
|
|
}
|
|
out:
|
|
splx(s);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Stop output on a line.
|
|
*/
|
|
void
|
|
serstop(tp, flag)
|
|
struct tty *tp;
|
|
int flag;
|
|
{
|
|
struct ser_softc *sc = ser_cd.cd_devs[SERUNIT(tp->t_dev)];
|
|
int s;
|
|
|
|
s = splserial();
|
|
if (ISSET(tp->t_state, TS_BUSY)) {
|
|
/* Stop transmitting at the next chunk. */
|
|
sc->sc_tbc = 0;
|
|
sc->sc_heldtbc = 0;
|
|
if (!ISSET(tp->t_state, TS_TTSTOP))
|
|
SET(tp->t_state, TS_FLUSH);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
serdiag(arg)
|
|
void *arg;
|
|
{
|
|
struct ser_softc *sc = arg;
|
|
int overflows, floods;
|
|
int s;
|
|
|
|
s = splserial();
|
|
overflows = sc->sc_overflows;
|
|
sc->sc_overflows = 0;
|
|
floods = sc->sc_floods;
|
|
sc->sc_floods = 0;
|
|
sc->sc_errors = 0;
|
|
splx(s);
|
|
|
|
log(LOG_WARNING,
|
|
"%s: %d silo overflow%s, %d ibuf flood%s\n",
|
|
sc->sc_dev.dv_xname,
|
|
overflows, overflows == 1 ? "" : "s",
|
|
floods, floods == 1 ? "" : "s");
|
|
}
|
|
|
|
static
|
|
void ser_shutdown(sc)
|
|
struct ser_softc *sc;
|
|
{
|
|
int s;
|
|
struct tty *tp = sc->sc_tty;
|
|
|
|
|
|
s = splserial();
|
|
|
|
/* If we were asserting flow control, then deassert it. */
|
|
sc->sc_rx_blocked = 1;
|
|
ser_hwiflow(sc, 1);
|
|
|
|
/* Clear any break condition set with TIOCSBRK. */
|
|
ser_break(sc, 0);
|
|
|
|
/*
|
|
* Hang up if necessary. Wait a bit, so the other side has time to
|
|
* notice even if we immediately open the port again.
|
|
*/
|
|
if (ISSET(tp->t_cflag, HUPCL)) {
|
|
ser_modem(sc, 0);
|
|
(void) tsleep(sc, TTIPRI, ttclos, hz);
|
|
}
|
|
|
|
/* Turn off interrupts. */
|
|
CLR(sc->sc_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
|
|
CLR(sc->sc_imrb, IB_SCTS|IB_SDCD);
|
|
single_inst_bclr_b(MFP->mf_imrb, IB_SCTS|IB_SDCD);
|
|
single_inst_bclr_b(MFP->mf_imra, IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
|
|
splx(s);
|
|
}
|
|
|
|
static void
|
|
serrxint(sc, tp)
|
|
struct ser_softc *sc;
|
|
struct tty *tp;
|
|
{
|
|
u_int get, cc, scc;
|
|
int code;
|
|
u_char rsr;
|
|
int s;
|
|
static int lsrmap[8] = {
|
|
0, TTY_PE,
|
|
TTY_FE, TTY_PE|TTY_FE,
|
|
TTY_FE, TTY_PE|TTY_FE,
|
|
TTY_FE, TTY_PE|TTY_FE
|
|
};
|
|
|
|
get = sc->sc_rbget;
|
|
scc = cc = RXBUFSIZE - sc->sc_rbavail;
|
|
|
|
if (cc == RXBUFSIZE) {
|
|
sc->sc_floods++;
|
|
if (sc->sc_errors++ == 0)
|
|
timeout(serdiag, sc, 60 * hz);
|
|
}
|
|
|
|
while (cc--) {
|
|
rsr = sc->sc_lbuf[get];
|
|
if (ISSET(rsr, RSR_BREAK)) {
|
|
#ifdef DDB
|
|
if (ISSET(sc->sc_hwflags, SER_HW_CONSOLE))
|
|
Debugger();
|
|
#endif
|
|
}
|
|
else if (ISSET(rsr, RSR_OERR)) {
|
|
sc->sc_overflows++;
|
|
if (sc->sc_errors++ == 0)
|
|
timeout(serdiag, sc, 60 * hz);
|
|
}
|
|
code = sc->sc_rbuf[get] |
|
|
lsrmap[(rsr & (RSR_BREAK|RSR_FERR|RSR_PERR)) >> 3];
|
|
(*linesw[tp->t_line].l_rint)(code, tp);
|
|
get = (get + 1) & RXBUFMASK;
|
|
}
|
|
|
|
sc->sc_rbget = get;
|
|
s = splserial();
|
|
sc->sc_rbavail += scc;
|
|
/*
|
|
* Buffers should be ok again, release possible block, but only if the
|
|
* tty layer isn't blocking too.
|
|
*/
|
|
if (sc->sc_rx_blocked && !ISSET(tp->t_state, TS_TBLOCK)) {
|
|
sc->sc_rx_blocked = 0;
|
|
ser_hwiflow(sc, 0);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
static void
|
|
sertxint(sc, tp)
|
|
struct ser_softc *sc;
|
|
struct tty *tp;
|
|
{
|
|
|
|
CLR(tp->t_state, TS_BUSY);
|
|
if (ISSET(tp->t_state, TS_FLUSH))
|
|
CLR(tp->t_state, TS_FLUSH);
|
|
else
|
|
ndflush(&tp->t_outq, (int)(sc->sc_tba - tp->t_outq.c_cf));
|
|
(*linesw[tp->t_line].l_start)(tp);
|
|
}
|
|
|
|
static void
|
|
sermsrint(sc, tp)
|
|
struct ser_softc *sc;
|
|
struct tty *tp;
|
|
{
|
|
u_char msr, delta;
|
|
int s;
|
|
|
|
s = splserial();
|
|
msr = sc->sc_msr;
|
|
delta = sc->sc_msr_delta;
|
|
sc->sc_msr_delta = 0;
|
|
splx(s);
|
|
|
|
if (ISSET(delta, sc->sc_msr_dcd)) {
|
|
/*
|
|
* Inform the tty layer that carrier detect changed.
|
|
*/
|
|
(void) (*linesw[tp->t_line].l_modem)(tp, ISSET(msr, MCR_DCD));
|
|
}
|
|
|
|
if (ISSET(delta, sc->sc_msr_cts)) {
|
|
/* Block or unblock output according to flow control. */
|
|
if (ISSET(msr, sc->sc_msr_cts)) {
|
|
sc->sc_tx_stopped = 0;
|
|
(*linesw[tp->t_line].l_start)(tp);
|
|
} else {
|
|
sc->sc_tx_stopped = 1;
|
|
serstop(tp, 0);
|
|
}
|
|
}
|
|
|
|
#ifdef SER_DEBUG
|
|
serstatus(sc, "sermsrint");
|
|
#endif
|
|
}
|
|
|
|
void
|
|
sersoft(arg)
|
|
void *arg;
|
|
{
|
|
struct ser_softc *sc = arg;
|
|
struct tty *tp;
|
|
|
|
ser_softintr_scheduled = 0;
|
|
|
|
tp = sc->sc_tty;
|
|
if (tp == NULL)
|
|
return;
|
|
|
|
if (!ISSET(tp->t_state, TS_ISOPEN) && (tp->t_wopen == 0))
|
|
return;
|
|
|
|
if (sc->sc_rx_ready) {
|
|
sc->sc_rx_ready = 0;
|
|
serrxint(sc, tp);
|
|
}
|
|
|
|
if (sc->sc_st_check) {
|
|
sc->sc_st_check = 0;
|
|
sermsrint(sc, tp);
|
|
}
|
|
|
|
if (sc->sc_tx_done) {
|
|
sc->sc_tx_done = 0;
|
|
sertxint(sc, tp);
|
|
}
|
|
}
|
|
|
|
int
|
|
sermintr(arg)
|
|
void *arg;
|
|
{
|
|
struct ser_softc *sc = arg;
|
|
u_char msr, delta;
|
|
|
|
msr = ~MFP->mf_gpip;
|
|
delta = msr ^ sc->sc_msr;
|
|
sc->sc_msr = sc->sc_msr & ~(MCR_CTS|MCR_DCD|MCR_RI);
|
|
sc->sc_msr |= msr & (MCR_CTS|MCR_DCD|MCR_RI);
|
|
|
|
if (ISSET(delta, sc->sc_msr_mask)) {
|
|
sc->sc_msr_delta |= delta;
|
|
|
|
/*
|
|
* Stop output immediately if we lose the output
|
|
* flow control signal or carrier detect.
|
|
*/
|
|
if (ISSET(~msr, sc->sc_msr_mask)) {
|
|
sc->sc_tbc = 0;
|
|
sc->sc_heldtbc = 0;
|
|
#ifdef SER_DEBUG
|
|
serstatus(sc, "sermintr ");
|
|
#endif
|
|
}
|
|
|
|
sc->sc_st_check = 1;
|
|
}
|
|
if (!ser_softintr_scheduled)
|
|
add_sicallback((si_farg)sersoft, sc, 0);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
sertrintr(arg)
|
|
void *arg;
|
|
{
|
|
struct ser_softc *sc = arg;
|
|
u_int put, cc;
|
|
u_char rsr, tsr;
|
|
|
|
put = sc->sc_rbput;
|
|
cc = sc->sc_rbavail;
|
|
|
|
rsr = MFP->mf_rsr;
|
|
if (ISSET(rsr, RSR_BFULL|RSR_BREAK)) {
|
|
for (; ISSET(rsr, RSR_BFULL|RSR_BREAK) && cc > 0; cc--) {
|
|
sc->sc_rbuf[put] = MFP->mf_udr;
|
|
sc->sc_lbuf[put] = rsr;
|
|
put = (put + 1) & RXBUFMASK;
|
|
if ((rsr & RSR_BREAK) && (MFP->mf_rsr & RSR_BREAK))
|
|
rsr = 0;
|
|
else rsr = MFP->mf_rsr;
|
|
}
|
|
/*
|
|
* Current string of incoming characters ended because
|
|
* no more data was available. Schedule a receive event
|
|
* if any data was received. Drop any characters that
|
|
* we couldn't handle.
|
|
*/
|
|
sc->sc_rbput = put;
|
|
sc->sc_rbavail = cc;
|
|
sc->sc_rx_ready = 1;
|
|
/*
|
|
* See if we are in danger of overflowing a buffer. If
|
|
* so, use hardware flow control to ease the pressure.
|
|
*/
|
|
if (sc->sc_rx_blocked == 0 &&
|
|
cc < sc->sc_r_hiwat) {
|
|
sc->sc_rx_blocked = 1;
|
|
ser_hwiflow(sc, 1);
|
|
}
|
|
/*
|
|
* If we're out of space, throw away any further input.
|
|
*/
|
|
if (!cc) {
|
|
while (ISSET(rsr, RSR_BFULL|RSR_BREAK)) {
|
|
rsr = MFP->mf_udr;
|
|
rsr = MFP->mf_rsr;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Done handling any receive interrupts. See if data can be
|
|
* transmitted as well. Schedule tx done event if no data left
|
|
* and tty was marked busy.
|
|
*/
|
|
tsr = MFP->mf_tsr;
|
|
if (ISSET(tsr, TSR_BE)) {
|
|
/*
|
|
* If we've delayed a parameter change, do it now, and restart
|
|
* output.
|
|
*/
|
|
if (sc->sc_heldchange) {
|
|
ser_loadchannelregs(sc);
|
|
sc->sc_heldchange = 0;
|
|
sc->sc_tbc = sc->sc_heldtbc;
|
|
sc->sc_heldtbc = 0;
|
|
}
|
|
/* Output the next character, if any. */
|
|
if (sc->sc_tbc > 0) {
|
|
MFP->mf_udr = *sc->sc_tba;
|
|
sc->sc_tbc --;
|
|
sc->sc_tba ++;
|
|
} else if (sc->sc_tx_busy) {
|
|
sc->sc_tx_busy = 0;
|
|
sc->sc_tx_done = 1;
|
|
}
|
|
}
|
|
|
|
if (!ser_softintr_scheduled)
|
|
add_sicallback((si_farg)sersoft, sc, 0);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
serspeed(speed)
|
|
long speed;
|
|
{
|
|
#define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */
|
|
|
|
int div, x, err;
|
|
|
|
if (speed <= 0)
|
|
return (-1);
|
|
|
|
for (div = 4; div <= 64; div *= 4) {
|
|
x = divrnd((SER_FREQ / div), speed);
|
|
|
|
/*
|
|
* The value must fit in the timer-d dataregister. If
|
|
* not, try another delay-mode.
|
|
*/
|
|
if ((x/2) > 255)
|
|
continue;
|
|
|
|
/*
|
|
* Baudrate to high for the interface or cannot be made
|
|
* within tolerance.
|
|
*/
|
|
if (x <= 0)
|
|
return (-1);
|
|
|
|
err = divrnd((SER_FREQ / div) * 1000, speed * x) - 1000;
|
|
if (err < 0)
|
|
err = -err;
|
|
if (err > SER_TOLERANCE)
|
|
continue;
|
|
|
|
/*
|
|
* Translate 'div' to delay-code
|
|
*/
|
|
if (div == 4)
|
|
div = 1;
|
|
else if (div == 16)
|
|
div = 3;
|
|
else if (div == 64)
|
|
div = 5;
|
|
|
|
return ((x/2) | (div << 8));
|
|
}
|
|
return (-1);
|
|
|
|
#undef divrnd(n, q)
|
|
}
|
|
|
|
/*
|
|
* Following are all routines needed for SER to act as console
|
|
*/
|
|
#include <dev/cons.h>
|
|
|
|
void
|
|
sercnprobe(cp)
|
|
struct consdev *cp;
|
|
{
|
|
/*
|
|
* Activate serial console when DCD present...
|
|
*/
|
|
if (MFP->mf_gpip & MCR_DCD) {
|
|
cp->cn_pri = CN_DEAD;
|
|
return;
|
|
}
|
|
for (sermajor = 0; sermajor < nchrdev; sermajor++)
|
|
if (cdevsw[sermajor].d_open == seropen)
|
|
break;
|
|
|
|
/* initialize required fields */
|
|
cp->cn_dev = makedev(sermajor, 0); /* XXX: LWP What unit? */
|
|
#ifdef SERCONSOLE
|
|
cp->cn_pri = CN_REMOTE; /* Force a serial port console */
|
|
#else
|
|
cp->cn_pri = CN_NORMAL;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
sercninit(cp)
|
|
struct consdev *cp;
|
|
{
|
|
serinitcons(CONSBAUD);
|
|
}
|
|
|
|
/*
|
|
* Initialize UART to known state.
|
|
*/
|
|
void
|
|
serinit(baud)
|
|
int baud;
|
|
{
|
|
int ospeed = serspeed(baud);
|
|
|
|
MFP->mf_ucr = UCR_CLKDIV|UCR_8BITS|UCR_STOPB1;
|
|
MFP->mf_rsr = RSR_ENAB;
|
|
MFP->mf_tsr = TSR_ENAB;
|
|
|
|
single_inst_bclr_b(MFP->mf_tcdcr, 0x07);
|
|
MFP->mf_tddr = ospeed;
|
|
single_inst_bset_b(MFP->mf_tcdcr, (ospeed >> 8) & 0x0f);
|
|
}
|
|
|
|
/*
|
|
* Set UART for console use. Do normal init, then enable interrupts.
|
|
*/
|
|
void
|
|
serinitcons(baud)
|
|
int baud;
|
|
{
|
|
serinit(baud);
|
|
|
|
/* Set rts/dtr */
|
|
ym2149_rts(0);
|
|
ym2149_dtr(0);
|
|
|
|
single_inst_bset_b(MFP->mf_imra, (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR));
|
|
}
|
|
|
|
int
|
|
sercngetc(dev)
|
|
dev_t dev;
|
|
{
|
|
u_char stat, c;
|
|
int s;
|
|
|
|
s = splserial();
|
|
while (!ISSET(stat = MFP->mf_rsr, RSR_BFULL)) {
|
|
if (!ISSET(stat, RSR_ENAB)) /* XXX */
|
|
MFP->mf_rsr |= RSR_ENAB;
|
|
if (stat & (RSR_FERR|RSR_PERR|RSR_OERR))
|
|
c = MFP->mf_udr;
|
|
}
|
|
c = MFP->mf_udr;
|
|
splx(s);
|
|
return c;
|
|
}
|
|
|
|
u_int s_imra;
|
|
u_int s_stat1, s_stat2, s_stat3;
|
|
void
|
|
sercnputc(dev, c)
|
|
dev_t dev;
|
|
int c;
|
|
{
|
|
int timo;
|
|
u_char stat, imra;
|
|
|
|
/* Mask serial interrupts */
|
|
imra = MFP->mf_imra & (IA_RRDY|IA_RERR|IA_TRDY|IA_TERR);
|
|
single_inst_bclr_b(MFP->mf_imra, imra);
|
|
s_imra = imra;
|
|
|
|
/* wait for any pending transmission to finish */
|
|
timo = 50000;
|
|
s_stat1 = MFP->mf_tsr;
|
|
while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo)
|
|
;
|
|
MFP->mf_udr = c;
|
|
/* wait for this transmission to complete */
|
|
timo = 1500000;
|
|
s_stat2 = MFP->mf_tsr;
|
|
while (!ISSET(stat = MFP->mf_tsr, TSR_BE) && --timo)
|
|
;
|
|
|
|
s_stat3 = MFP->mf_tsr;
|
|
/* Clear pending serial interrupts and re-enable */
|
|
single_inst_bclr_b(MFP->mf_ipra, imra);
|
|
single_inst_bset_b(MFP->mf_imra, imra);
|
|
}
|
|
|
|
void
|
|
sercnpollc(dev, on)
|
|
dev_t dev;
|
|
int on;
|
|
{
|
|
|
|
}
|