1649 lines
35 KiB
C
1649 lines
35 KiB
C
/* $NetBSD: sa11x0_com.c,v 1.9 2001/05/21 16:50:35 toshii Exp $ */
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/*-
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* Copyright (c) 1998, 1999, 2001 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 IWAMOTO Toshihiro.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by 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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/*
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* Copyright (c) 1991 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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* @(#)com.c 7.5 (Berkeley) 5/16/91
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*/
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#include "opt_ddb.h"
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#include "opt_ddbparam.h"
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#include "opt_com.h"
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#include "rnd.h"
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#if NRND > 0 && defined(RND_COM)
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#include <sys/rnd.h>
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/tty.h>
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#include <sys/uio.h>
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#include <sys/vnode.h>
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#include <dev/cons.h>
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#include <machine/bus.h>
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#include <hpcarm/sa11x0/sa11x0_reg.h>
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#include <hpcarm/sa11x0/sa11x0_var.h>
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#include <hpcarm/sa11x0/sa11x0_comreg.h>
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#include <hpcarm/sa11x0/sa11x0_comvar.h>
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#include "sacom.h"
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cdev_decl(sacom);
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static int sacom_match(struct device *, struct cfdata *, void *);
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static void sacom_attach(struct device *, struct device *, void *);
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static void sacom_filltx(struct sacom_softc *);
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static void sacom_attach_subr(struct sacom_softc *);
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#if defined(DDB) || defined(KGDB)
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static void sacom_enable_debugport(struct sacom_softc *);
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#endif
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void sacom_config(struct sacom_softc *);
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void sacom_shutdown(struct sacom_softc *);
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static u_int cflag2cr0(tcflag_t);
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int sacomparam(struct tty *, struct termios *);
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void sacomstart(struct tty *);
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void sacomstop(struct tty *, int);
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int sacomhwiflow(struct tty *, int);
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void sacom_loadchannelregs(struct sacom_softc *);
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void sacom_hwiflow(struct sacom_softc *);
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void sacom_break(struct sacom_softc *, int);
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void sacom_modem(struct sacom_softc *, int);
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void tiocm_to_sacom(struct sacom_softc *, u_long, int);
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int sacom_to_tiocm(struct sacom_softc *);
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void sacom_iflush(struct sacom_softc *);
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#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
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void sacomsoft(void *);
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#else
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void sacomsoft(void);
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#endif
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static inline void sacom_rxsoft(struct sacom_softc *, struct tty *);
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static inline void sacom_txsoft(struct sacom_softc *, struct tty *);
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static inline void sacom_stsoft(struct sacom_softc *, struct tty *);
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static inline void sacom_schedrx(struct sacom_softc *);
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#define COMUNIT_MASK 0x7ffff
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#define COMDIALOUT_MASK 0x80000
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#define COMUNIT(x) (minor(x) & COMUNIT_MASK)
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#define COMDIALOUT(x) (minor(x) & COMDIALOUT_MASK)
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#define COM_ISALIVE(sc) ((sc)->enabled != 0 && \
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ISSET((sc)->sc_dev.dv_flags, DVF_ACTIVE))
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#define COM_BARRIER(t, h, f) bus_space_barrier((t), (h), 0, COM_NPORTS, (f))
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#define COM_LOCK(sc)
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#define COM_UNLOCK(sc)
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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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int sacomintr(void *);
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int sacomcngetc(dev_t);
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void sacomcnputc(dev_t, int);
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void sacomcnpollc(dev_t, int);
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void sacomcnprobe(struct consdev *);
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void sacomcninit(struct consdev *);
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extern struct bus_space sa11x0_bs_tag;
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static bus_space_tag_t sacomconstag;
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static bus_space_handle_t sacomconsioh;
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static bus_addr_t sacomconsaddr = SACOM3_BASE; /* XXX */
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static int sacomconsattached;
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static int sacomconsrate;
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static tcflag_t sacomconscflag;
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struct cfattach sacom_ca = {
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sizeof(struct sacom_softc), sacom_match, sacom_attach
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};
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extern struct cfdriver sacom_cd;
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struct consdev sacomcons = {
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NULL, NULL, sacomcngetc, sacomcnputc, sacomcnpollc, NULL,
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NODEV, CN_NORMAL
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};
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#ifndef CONMODE
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#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
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#endif
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#ifndef CONSPEED
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#define CONSPEED 9600
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#endif
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#ifndef CONADDR
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#define CONADDR SACOM3_BASE
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#endif
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static int
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sacom_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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return (1);
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}
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void
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sacom_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct sacom_softc *sc = (struct sacom_softc*)self;
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struct sa11x0_attach_args *sa = aux;
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sc->sc_iot = sa->sa_iot;
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sc->sc_baseaddr = sa->sa_addr;
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if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0,
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&sc->sc_ioh)) {
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printf("%s: unable to map registers\n", sc->sc_dev.dv_xname);
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return;
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}
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printf("%s: ", sc->sc_dev.dv_xname);
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switch(sc->sc_baseaddr) {
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case 0x8005000:
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printf("SA11x0 UART3\n");
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break;
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case 0x8003000:
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printf("SA11x0 UART1\n");
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break;
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default:
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printf("unknown SA11x0 UART\n");
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break;
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}
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sacom_attach_subr(sc);
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sa11x0_intr_establish(0, sa->sa_intr, 1, IPL_SERIAL, sacomintr, sc);
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}
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void
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sacom_attach_subr(sc)
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struct sacom_softc *sc;
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{
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bus_addr_t iobase = sc->sc_baseaddr;
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bus_space_tag_t iot = sc->sc_iot;
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struct tty *tp;
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#if (defined(MULTIPROCESSOR) || defined(LOCKDEBUG)) && defined(COM_MPLOCK)
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simple_lock_init(&sc->sc_lock);
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#endif
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/* XXX Do we need to disable interrupts here? */
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if (iot == sacomconstag && iobase == sacomconsaddr) {
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sacomconsattached = 1;
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sc->sc_speed = SACOMSPEED(sacomconsrate);
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/* Make sure the console is always "hardwired". */
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delay(10000); /* wait for output to finish */
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SET(sc->sc_hwflags, COM_HW_CONSOLE);
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SET(sc->sc_swflags, TIOCFLAG_SOFTCAR);
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}
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tp = ttymalloc();
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tp->t_oproc = sacomstart;
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tp->t_param = sacomparam;
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tp->t_hwiflow = sacomhwiflow;
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sc->sc_tty = tp;
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sc->sc_rbuf = malloc(SACOM_RING_SIZE << 1, M_DEVBUF, M_NOWAIT);
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sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf;
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sc->sc_rbavail = SACOM_RING_SIZE;
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if (sc->sc_rbuf == NULL) {
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printf("%s: unable to allocate ring buffer\n",
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sc->sc_dev.dv_xname);
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return;
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}
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sc->sc_ebuf = sc->sc_rbuf + (SACOM_RING_SIZE << 1);
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sc->sc_tbc = 0;
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tty_attach(tp);
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if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
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int maj;
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/* locate the major number */
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for (maj = 0; maj < nchrdev; maj++)
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if (cdevsw[maj].d_open == sacomopen)
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break;
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cn_tab->cn_dev = makedev(maj, sc->sc_dev.dv_unit);
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delay(10000); /* XXX */
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printf("%s: console\n", sc->sc_dev.dv_xname);
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delay(10000); /* XXX */
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}
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#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
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sc->sc_si = softintr_establish(IPL_SOFTSERIAL, sacomsoft, sc);
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#endif
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#if NRND > 0 && defined(RND_COM)
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rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname,
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RND_TYPE_TTY, 0);
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#endif
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/* if there are no enable/disable functions, assume the device
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is always enabled */
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if (!sc->enable)
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sc->enabled = 1;
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sacom_config(sc);
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SET(sc->sc_hwflags, COM_HW_DEV_OK);
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}
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/* This is necessary when dynamically changing SAIP configuration. */
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int
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sacom_detach(self, flags)
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struct device *self;
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int flags;
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{
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struct sacom_softc *sc = (struct sacom_softc *)self;
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int maj, mn;
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/* locate the major number */
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for (maj = 0; maj < nchrdev; maj++)
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if (cdevsw[maj].d_open == sacomopen)
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break;
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/* Nuke the vnodes for any open instances. */
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mn = self->dv_unit;
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vdevgone(maj, mn, mn, VCHR);
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mn |= COMDIALOUT_MASK;
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vdevgone(maj, mn, mn, VCHR);
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/* Free the receive buffer. */
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free(sc->sc_rbuf, M_DEVBUF);
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/* Detach and free the tty. */
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tty_detach(sc->sc_tty);
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ttyfree(sc->sc_tty);
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#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
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/* Unhook the soft interrupt handler. */
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softintr_disestablish(sc->sc_si);
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#endif
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#if NRND > 0 && defined(RND_COM)
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/* Unhook the entropy source. */
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rnd_detach_source(&sc->rnd_source);
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#endif
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return (0);
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}
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void
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sacom_config(sc)
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struct sacom_softc *sc;
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{
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bus_space_tag_t iot = sc->sc_iot;
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bus_space_handle_t ioh = sc->sc_ioh;
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/* Disable engine before configuring the device. */
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sc->sc_cr3 = 0;
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bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3);
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#ifdef DDB
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if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
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sacom_enable_debugport(sc);
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#endif
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}
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static void
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sacom_enable_debugport(sc)
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struct sacom_softc *sc;
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{
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bus_space_tag_t iot = sc->sc_iot;
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bus_space_handle_t ioh = sc->sc_ioh;
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int s;
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s = splserial();
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COM_LOCK(sc);
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sc->sc_cr3 = CR3_RXE | CR3_TXE;
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bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3);
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COM_UNLOCK(sc);
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splx(s);
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}
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int
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sacom_activate(self, act)
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struct device *self;
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enum devact act;
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{
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struct sacom_softc *sc = (struct sacom_softc *)self;
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int s, rv = 0;
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s = splserial();
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COM_LOCK(sc);
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switch (act) {
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case DVACT_ACTIVATE:
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rv = EOPNOTSUPP;
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break;
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case DVACT_DEACTIVATE:
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if (sc->sc_hwflags & (COM_HW_CONSOLE|COM_HW_KGDB)) {
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rv = EBUSY;
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break;
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}
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if (sc->disable != NULL && sc->enabled != 0) {
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(*sc->disable)(sc);
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sc->enabled = 0;
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}
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break;
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}
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COM_UNLOCK(sc);
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splx(s);
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return (rv);
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}
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void
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sacom_shutdown(sc)
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struct sacom_softc *sc;
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{
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struct tty *tp = sc->sc_tty;
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int s;
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s = splserial();
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COM_LOCK(sc);
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/* Clear any break condition set with TIOCSBRK. */
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sacom_break(sc, 0);
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/*
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* Hang up if necessary. Wait a bit, so the other side has time to
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* notice even if we immediately open the port again.
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* Avoid tsleeping above splhigh().
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*/
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if (ISSET(tp->t_cflag, HUPCL)) {
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sacom_modem(sc, 0);
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COM_UNLOCK(sc);
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splx(s);
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/* XXX tsleep will only timeout */
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(void) tsleep(sc, TTIPRI, ttclos, hz);
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s = splserial();
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COM_LOCK(sc);
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}
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/* Turn off interrupts. */
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sc->sc_cr3 = 0;
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, sc->sc_cr3);
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if (sc->disable) {
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#ifdef DIAGNOSTIC
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if (!sc->enabled)
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panic("sacom_shutdown: not enabled?");
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#endif
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(*sc->disable)(sc);
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sc->enabled = 0;
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}
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COM_UNLOCK(sc);
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splx(s);
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}
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int
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sacomopen(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 sacom_softc *sc;
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struct tty *tp;
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int s, s2;
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int error;
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sc = device_lookup(&sacom_cd, COMUNIT(dev));
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if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK) ||
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sc->sc_rbuf == NULL)
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return (ENXIO);
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if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0)
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return (ENXIO);
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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 iff 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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|
|
tp->t_dev = dev;
|
|
|
|
s2 = splserial();
|
|
COM_LOCK(sc);
|
|
|
|
if (sc->enable) {
|
|
if ((*sc->enable)(sc)) {
|
|
COM_UNLOCK(sc);
|
|
splx(s2);
|
|
splx(s);
|
|
printf("%s: device enable failed\n",
|
|
sc->sc_dev.dv_xname);
|
|
return (EIO);
|
|
}
|
|
sc->enabled = 1;
|
|
sacom_config(sc);
|
|
}
|
|
|
|
/* Turn on interrupts. */
|
|
sc->sc_cr3 = CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE;
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3,
|
|
sc->sc_cr3);
|
|
|
|
|
|
COM_UNLOCK(sc);
|
|
splx(s2);
|
|
|
|
/*
|
|
* Initialize the termios status to the defaults. Add in the
|
|
* sticky bits from TIOCSFLAGS.
|
|
*/
|
|
t.c_ispeed = 0;
|
|
if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
|
|
t.c_ospeed = sacomconsrate;
|
|
t.c_cflag = sacomconscflag;
|
|
} else {
|
|
t.c_ospeed = TTYDEF_SPEED;
|
|
t.c_cflag = TTYDEF_CFLAG;
|
|
}
|
|
if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
|
|
SET(t.c_cflag, CLOCAL);
|
|
if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
|
|
SET(t.c_cflag, CRTSCTS);
|
|
if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
|
|
SET(t.c_cflag, MDMBUF);
|
|
/* Make sure sacomparam() will do something. */
|
|
tp->t_ospeed = 0;
|
|
(void) sacomparam(tp, &t);
|
|
tp->t_iflag = TTYDEF_IFLAG;
|
|
tp->t_oflag = TTYDEF_OFLAG;
|
|
tp->t_lflag = TTYDEF_LFLAG;
|
|
ttychars(tp);
|
|
ttsetwater(tp);
|
|
|
|
s2 = splserial();
|
|
COM_LOCK(sc);
|
|
|
|
/*
|
|
* Turn on DTR. We must always do this, even if carrier is not
|
|
* present, because otherwise we'd have to use TIOCSDTR
|
|
* immediately after setting CLOCAL, which applications do not
|
|
* expect. We always assert DTR while the device is open
|
|
* unless explicitly requested to deassert it.
|
|
*/
|
|
sacom_modem(sc, 1);
|
|
|
|
/* Clear the input ring, and unblock. */
|
|
sc->sc_rbput = sc->sc_rbget = sc->sc_rbuf;
|
|
sc->sc_rbavail = SACOM_RING_SIZE;
|
|
sacom_iflush(sc);
|
|
CLR(sc->sc_rx_flags, RX_ANY_BLOCK);
|
|
sacom_hwiflow(sc);
|
|
|
|
#ifdef COM_DEBUG
|
|
if (sacom_debug)
|
|
comstatus(sc, "sacomopen ");
|
|
#endif
|
|
|
|
COM_UNLOCK(sc);
|
|
splx(s2);
|
|
}
|
|
|
|
splx(s);
|
|
|
|
error = ttyopen(tp, COMDIALOUT(dev), ISSET(flag, O_NONBLOCK));
|
|
if (error)
|
|
goto bad;
|
|
|
|
error = (*tp->t_linesw->l_open)(dev, tp);
|
|
if (error)
|
|
goto bad;
|
|
|
|
return (0);
|
|
|
|
bad:
|
|
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
|
|
/*
|
|
* We failed to open the device, and nobody else had it opened.
|
|
* Clean up the state as appropriate.
|
|
*/
|
|
sacom_shutdown(sc);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sacomclose(dev, flag, mode, p)
|
|
dev_t dev;
|
|
int flag, mode;
|
|
struct proc *p;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev));
|
|
struct tty *tp = sc->sc_tty;
|
|
|
|
/* XXX This is for cons.c. */
|
|
if (!ISSET(tp->t_state, TS_ISOPEN))
|
|
return (0);
|
|
|
|
(*tp->t_linesw->l_close)(tp, flag);
|
|
ttyclose(tp);
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return (0);
|
|
|
|
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) {
|
|
/*
|
|
* Although we got a last close, the device may still be in
|
|
* use; e.g. if this was the dialout node, and there are still
|
|
* processes waiting for carrier on the non-dialout node.
|
|
*/
|
|
sacom_shutdown(sc);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sacomread(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev));
|
|
struct tty *tp = sc->sc_tty;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return (EIO);
|
|
|
|
return ((*tp->t_linesw->l_read)(tp, uio, flag));
|
|
}
|
|
|
|
int
|
|
sacomwrite(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev));
|
|
struct tty *tp = sc->sc_tty;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return (EIO);
|
|
|
|
return ((*tp->t_linesw->l_write)(tp, uio, flag));
|
|
}
|
|
|
|
int
|
|
sacompoll(dev, events, p)
|
|
dev_t dev;
|
|
int events;
|
|
struct proc *p;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev));
|
|
struct tty *tp = sc->sc_tty;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return (EIO);
|
|
|
|
return ((*tp->t_linesw->l_poll)(tp, events, p));
|
|
}
|
|
|
|
struct tty *
|
|
sacomtty(dev)
|
|
dev_t dev;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev));
|
|
struct tty *tp = sc->sc_tty;
|
|
|
|
return (tp);
|
|
}
|
|
|
|
int
|
|
sacomioctl(dev, cmd, data, flag, p)
|
|
dev_t dev;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(dev));
|
|
struct tty *tp = sc->sc_tty;
|
|
int error;
|
|
int s;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return (EIO);
|
|
|
|
error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p);
|
|
if (error >= 0)
|
|
return (error);
|
|
|
|
error = ttioctl(tp, cmd, data, flag, p);
|
|
if (error >= 0)
|
|
return (error);
|
|
|
|
error = 0;
|
|
|
|
s = splserial();
|
|
COM_LOCK(sc);
|
|
|
|
switch (cmd) {
|
|
case TIOCSBRK:
|
|
sacom_break(sc, 1);
|
|
break;
|
|
|
|
case TIOCCBRK:
|
|
sacom_break(sc, 0);
|
|
break;
|
|
|
|
case TIOCSDTR:
|
|
sacom_modem(sc, 1);
|
|
break;
|
|
|
|
case TIOCCDTR:
|
|
sacom_modem(sc, 0);
|
|
break;
|
|
|
|
case TIOCGFLAGS:
|
|
*(int *)data = sc->sc_swflags;
|
|
break;
|
|
|
|
case TIOCSFLAGS:
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
break;
|
|
sc->sc_swflags = *(int *)data;
|
|
break;
|
|
|
|
case TIOCMSET:
|
|
case TIOCMBIS:
|
|
case TIOCMBIC:
|
|
tiocm_to_sacom(sc, cmd, *(int *)data);
|
|
break;
|
|
|
|
case TIOCMGET:
|
|
*(int *)data = sacom_to_tiocm(sc);
|
|
break;
|
|
|
|
default:
|
|
error = ENOTTY;
|
|
break;
|
|
}
|
|
|
|
COM_UNLOCK(sc);
|
|
splx(s);
|
|
|
|
#ifdef COM_DEBUG
|
|
if (sacom_debug)
|
|
comstatus(sc, "comioctl ");
|
|
#endif
|
|
|
|
return (error);
|
|
}
|
|
|
|
static inline void
|
|
sacom_schedrx(sc)
|
|
struct sacom_softc *sc;
|
|
{
|
|
|
|
sc->sc_rx_ready = 1;
|
|
|
|
/* Wake up the poller. */
|
|
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
softintr_schedule(sc->sc_si);
|
|
#else
|
|
setsoftserial();
|
|
#endif
|
|
}
|
|
|
|
void
|
|
sacom_break(sc, onoff)
|
|
struct sacom_softc *sc;
|
|
int onoff;
|
|
{
|
|
|
|
if (onoff)
|
|
SET(sc->sc_cr3, CR3_BRK);
|
|
else
|
|
CLR(sc->sc_cr3, CR3_BRK);
|
|
|
|
if (!sc->sc_heldchange) {
|
|
if (sc->sc_tx_busy) {
|
|
sc->sc_heldtbc = sc->sc_tbc;
|
|
sc->sc_tbc = 0;
|
|
sc->sc_heldchange = 1;
|
|
} else
|
|
sacom_loadchannelregs(sc);
|
|
}
|
|
}
|
|
|
|
void
|
|
sacom_modem(sc, onoff)
|
|
struct sacom_softc *sc;
|
|
int onoff;
|
|
{
|
|
if (!sc->sc_heldchange) {
|
|
if (sc->sc_tx_busy) {
|
|
sc->sc_heldtbc = sc->sc_tbc;
|
|
sc->sc_tbc = 0;
|
|
sc->sc_heldchange = 1;
|
|
} else
|
|
sacom_loadchannelregs(sc);
|
|
}
|
|
}
|
|
|
|
void
|
|
tiocm_to_sacom(sc, how, ttybits)
|
|
struct sacom_softc *sc;
|
|
u_long how;
|
|
int ttybits;
|
|
{
|
|
}
|
|
|
|
int
|
|
sacom_to_tiocm(sc)
|
|
struct sacom_softc *sc;
|
|
{
|
|
int ttybits = 0;
|
|
|
|
if (sc->sc_cr3 != 0)
|
|
SET(ttybits, TIOCM_LE);
|
|
|
|
return (ttybits);
|
|
}
|
|
|
|
static u_int
|
|
cflag2cr0(cflag)
|
|
tcflag_t cflag;
|
|
{
|
|
u_int cr0;
|
|
|
|
cr0 = (cflag & PARENB) ? CR0_PE : 0;
|
|
cr0 |= (cflag & PARODD) ? 0 : CR0_OES;
|
|
cr0 |= (cflag & CSTOPB) ? CR0_SBS : 0;
|
|
cr0 |= ((cflag & CSIZE) == CS8) ? CR0_DSS : 0;
|
|
|
|
return (cr0);
|
|
}
|
|
|
|
int
|
|
sacomparam(tp, t)
|
|
struct tty *tp;
|
|
struct termios *t;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev));
|
|
int ospeed = SACOMSPEED(t->c_ospeed);
|
|
u_int cr0;
|
|
int s;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return (EIO);
|
|
|
|
/* Check requested parameters. */
|
|
if (ospeed < 0)
|
|
return (EINVAL);
|
|
if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* 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, COM_HW_CONSOLE)) {
|
|
SET(t->c_cflag, CLOCAL);
|
|
CLR(t->c_cflag, HUPCL);
|
|
}
|
|
|
|
/*
|
|
* If there were no changes, don't do anything. This avoids dropping
|
|
* input and improves performance when all we did was frob things like
|
|
* VMIN and VTIME.
|
|
*/
|
|
if (tp->t_ospeed == t->c_ospeed &&
|
|
tp->t_cflag == t->c_cflag)
|
|
return (0);
|
|
|
|
cr0 = cflag2cr0(t->c_cflag);
|
|
|
|
s = splserial();
|
|
COM_LOCK(sc);
|
|
|
|
sc->sc_cr0 = cr0;
|
|
|
|
sc->sc_speed = 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
|
|
sacom_loadchannelregs(sc);
|
|
}
|
|
|
|
if (!ISSET(t->c_cflag, CHWFLOW)) {
|
|
/* Disable the high water mark. */
|
|
if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) {
|
|
CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED);
|
|
sacom_schedrx(sc);
|
|
}
|
|
if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED)) {
|
|
CLR(sc->sc_rx_flags, RX_TTY_BLOCKED|RX_IBUF_BLOCKED);
|
|
sacom_hwiflow(sc);
|
|
}
|
|
}
|
|
|
|
COM_UNLOCK(sc);
|
|
splx(s);
|
|
|
|
(void) (*tp->t_linesw->l_modem)(tp, 1);
|
|
|
|
#ifdef COM_DEBUG
|
|
if (sacom_debug)
|
|
comstatus(sc, "comparam ");
|
|
#endif
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sacom_iflush(sc)
|
|
struct sacom_softc *sc;
|
|
{
|
|
bus_space_tag_t iot = sc->sc_iot;
|
|
bus_space_handle_t ioh = sc->sc_ioh;
|
|
#ifdef DIAGNOSTIC
|
|
int reg;
|
|
#endif
|
|
int timo;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
reg = 0xffff;
|
|
#endif
|
|
timo = 50;
|
|
/* flush any pending I/O */
|
|
if (sc->sc_cr3 & CR3_RXE) {
|
|
while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_RNE)
|
|
&& --timo)
|
|
#ifdef DIAGNOSTIC
|
|
reg =
|
|
#else
|
|
(void)
|
|
#endif
|
|
bus_space_read_4(iot, ioh, SACOM_DR);
|
|
}
|
|
#if 0
|
|
/* XXX is it good idea to wait TX finish? */
|
|
if (sc->sc_cr3 & CR3_TXE) {
|
|
timo = 500;
|
|
while (ISSET(bus_space_read_4(iot, ioh, SACOM_SR1), SR1_TBY)
|
|
&& --timo)
|
|
delay(100);
|
|
}
|
|
#endif
|
|
#ifdef DIAGNOSTIC
|
|
if (!timo)
|
|
printf("%s: sacom_iflush timeout %02x\n", sc->sc_dev.dv_xname,
|
|
reg);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
sacom_loadchannelregs(sc)
|
|
struct sacom_softc *sc;
|
|
{
|
|
bus_space_tag_t iot = sc->sc_iot;
|
|
bus_space_handle_t ioh = sc->sc_ioh;
|
|
|
|
/* XXXXX necessary? */
|
|
sacom_iflush(sc);
|
|
|
|
/* Need to stop engines first. */
|
|
bus_space_write_4(iot, ioh, SACOM_CR3, 0);
|
|
|
|
bus_space_write_4(iot, ioh, SACOM_CR1, sc->sc_speed >> 8);
|
|
bus_space_write_4(iot, ioh, SACOM_CR2, sc->sc_speed & 0xff);
|
|
|
|
bus_space_write_4(iot, ioh, SACOM_CR0, sc->sc_cr0);
|
|
bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3);
|
|
}
|
|
|
|
int
|
|
sacomhwiflow(tp, block)
|
|
struct tty *tp;
|
|
int block;
|
|
{
|
|
#if 0
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev));
|
|
int s;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return (0);
|
|
|
|
if (sc->sc_mcr_rts == 0)
|
|
return (0);
|
|
|
|
s = splserial();
|
|
COM_LOCK(sc);
|
|
|
|
if (block) {
|
|
if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) {
|
|
SET(sc->sc_rx_flags, RX_TTY_BLOCKED);
|
|
sacom_hwiflow(sc);
|
|
}
|
|
} else {
|
|
if (ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED)) {
|
|
CLR(sc->sc_rx_flags, RX_TTY_OVERFLOWED);
|
|
sacom_schedrx(sc);
|
|
}
|
|
if (ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) {
|
|
CLR(sc->sc_rx_flags, RX_TTY_BLOCKED);
|
|
sacom_hwiflow(sc);
|
|
}
|
|
}
|
|
|
|
COM_UNLOCK(sc);
|
|
splx(s);
|
|
#endif
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* (un)block input via hw flowcontrol
|
|
*/
|
|
void
|
|
sacom_hwiflow(sc)
|
|
struct sacom_softc *sc;
|
|
{
|
|
#if 0
|
|
bus_space_tag_t iot = sc->sc_iot;
|
|
bus_space_handle_t ioh = sc->sc_ioh;
|
|
|
|
/* XXX implement */
|
|
#endif
|
|
}
|
|
|
|
|
|
void
|
|
sacomstart(tp)
|
|
struct tty *tp;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev));
|
|
bus_space_tag_t iot = sc->sc_iot;
|
|
bus_space_handle_t ioh = sc->sc_ioh;
|
|
int s;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return;
|
|
|
|
s = spltty();
|
|
if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP))
|
|
goto out;
|
|
|
|
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 out;
|
|
}
|
|
|
|
/* 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();
|
|
COM_LOCK(sc);
|
|
|
|
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_cr3, CR3_TIE)) {
|
|
SET(sc->sc_cr3, CR3_TIE);
|
|
bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3);
|
|
}
|
|
|
|
/* Output the first chunk of the contiguous buffer. */
|
|
sacom_filltx(sc);
|
|
|
|
COM_UNLOCK(sc);
|
|
out:
|
|
splx(s);
|
|
return;
|
|
}
|
|
|
|
void
|
|
sacom_filltx(sc)
|
|
struct sacom_softc *sc;
|
|
{
|
|
bus_space_tag_t iot = sc->sc_iot;
|
|
bus_space_handle_t ioh = sc->sc_ioh;
|
|
int c, n;
|
|
|
|
n = 0;
|
|
while(bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1)
|
|
& SR1_TNF) {
|
|
if (n == SACOM_TXFIFOLEN || n == sc->sc_tbc)
|
|
break;
|
|
c = *(sc->sc_tba + n);
|
|
c &= 0xff;
|
|
bus_space_write_4(iot, ioh, SACOM_DR, c);
|
|
n++;
|
|
}
|
|
sc->sc_tbc -= n;
|
|
sc->sc_tba += n;
|
|
}
|
|
|
|
/*
|
|
* Stop output on a line.
|
|
*/
|
|
void
|
|
sacomstop(tp, flag)
|
|
struct tty *tp;
|
|
int flag;
|
|
{
|
|
struct sacom_softc *sc = device_lookup(&sacom_cd, COMUNIT(tp->t_dev));
|
|
int s;
|
|
|
|
s = splserial();
|
|
COM_LOCK(sc);
|
|
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);
|
|
}
|
|
COM_UNLOCK(sc);
|
|
splx(s);
|
|
}
|
|
|
|
static inline void
|
|
sacom_rxsoft(sc, tp)
|
|
struct sacom_softc *sc;
|
|
struct tty *tp;
|
|
{
|
|
int (*rint)(int c, struct tty *tp) = tp->t_linesw->l_rint;
|
|
u_char *get, *end;
|
|
u_int cc, scc;
|
|
u_char sr1;
|
|
int code;
|
|
int s;
|
|
|
|
end = sc->sc_ebuf;
|
|
get = sc->sc_rbget;
|
|
scc = cc = SACOM_RING_SIZE - sc->sc_rbavail;
|
|
|
|
while (cc) {
|
|
code = get[0];
|
|
sr1 = get[1];
|
|
if (ISSET(sr1, SR1_FRE))
|
|
SET(code, TTY_FE);
|
|
if (ISSET(sr1, SR1_PRE))
|
|
SET(code, TTY_PE);
|
|
if ((*rint)(code, tp) == -1) {
|
|
/*
|
|
* The line discipline's buffer is out of space.
|
|
*/
|
|
if (!ISSET(sc->sc_rx_flags, RX_TTY_BLOCKED)) {
|
|
/*
|
|
* We're either not using flow control, or the
|
|
* line discipline didn't tell us to block for
|
|
* some reason. Either way, we have no way to
|
|
* know when there's more space available, so
|
|
* just drop the rest of the data.
|
|
*/
|
|
get += cc << 1;
|
|
if (get >= end)
|
|
get -= SACOM_RING_SIZE << 1;
|
|
cc = 0;
|
|
} else {
|
|
/*
|
|
* Don't schedule any more receive processing
|
|
* until the line discipline tells us there's
|
|
* space available (through comhwiflow()).
|
|
* Leave the rest of the data in the input
|
|
* buffer.
|
|
*/
|
|
SET(sc->sc_rx_flags, RX_TTY_OVERFLOWED);
|
|
}
|
|
break;
|
|
}
|
|
get += 2;
|
|
if (get >= end)
|
|
get = sc->sc_rbuf;
|
|
cc--;
|
|
}
|
|
|
|
if (cc != scc) {
|
|
sc->sc_rbget = get;
|
|
s = splserial();
|
|
COM_LOCK(sc);
|
|
|
|
cc = sc->sc_rbavail += scc - cc;
|
|
/* Buffers should be ok again, release possible block. */
|
|
if (cc >= 1) {
|
|
if (ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) {
|
|
CLR(sc->sc_rx_flags, RX_IBUF_OVERFLOWED);
|
|
SET(sc->sc_cr3, CR3_RIE);
|
|
bus_space_write_4(sc->sc_iot, sc->sc_ioh,
|
|
SACOM_CR3, sc->sc_cr3);
|
|
}
|
|
}
|
|
COM_UNLOCK(sc);
|
|
splx(s);
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
sacom_txsoft(sc, tp)
|
|
struct sacom_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));
|
|
(*tp->t_linesw->l_start)(tp);
|
|
}
|
|
|
|
static inline void
|
|
sacom_stsoft(sc, tp)
|
|
struct sacom_softc *sc;
|
|
struct tty *tp;
|
|
{
|
|
}
|
|
|
|
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
void
|
|
sacomsoft(arg)
|
|
void *arg;
|
|
{
|
|
struct sacom_softc *sc = arg;
|
|
struct tty *tp;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return;
|
|
|
|
{
|
|
#else
|
|
void
|
|
sacomsoft()
|
|
{
|
|
struct sacom_softc *sc;
|
|
struct tty *tp;
|
|
int unit;
|
|
|
|
for (unit = 0; unit < sacom_cd.cd_ndevs; unit++) {
|
|
sc = device_lookup(&sacom_cd, unit);
|
|
if (sc == NULL || !ISSET(sc->sc_hwflags, COM_HW_DEV_OK))
|
|
continue;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
continue;
|
|
|
|
tp = sc->sc_tty;
|
|
if (tp == NULL)
|
|
continue;
|
|
if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0)
|
|
continue;
|
|
#endif
|
|
tp = sc->sc_tty;
|
|
|
|
if (sc->sc_rx_ready) {
|
|
sc->sc_rx_ready = 0;
|
|
sacom_rxsoft(sc, tp);
|
|
}
|
|
|
|
if (sc->sc_st_check) {
|
|
sc->sc_st_check = 0;
|
|
sacom_stsoft(sc, tp);
|
|
}
|
|
|
|
if (sc->sc_tx_done) {
|
|
sc->sc_tx_done = 0;
|
|
sacom_txsoft(sc, tp);
|
|
}
|
|
}
|
|
|
|
#ifndef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
#endif
|
|
}
|
|
|
|
#ifdef __ALIGN_BRACKET_LEVEL_FOR_CTAGS
|
|
/* there has got to be a better way to do comsoft() */
|
|
}}
|
|
#endif
|
|
|
|
int
|
|
sacomintr(arg)
|
|
void *arg;
|
|
{
|
|
struct sacom_softc *sc = arg;
|
|
bus_space_tag_t iot = sc->sc_iot;
|
|
bus_space_handle_t ioh = sc->sc_ioh;
|
|
u_char *put, *end;
|
|
u_int cc;
|
|
u_int sr0, sr1;
|
|
|
|
if (COM_ISALIVE(sc) == 0)
|
|
return (0);
|
|
|
|
COM_LOCK(sc);
|
|
sr0 = bus_space_read_4(iot, ioh, SACOM_SR0);
|
|
if (! sr0) {
|
|
COM_UNLOCK(sc);
|
|
return (0);
|
|
}
|
|
if (ISSET(sr0, SR0_EIF))
|
|
/* XXX silently discard error bits */
|
|
bus_space_read_4(iot, ioh, SACOM_DR);
|
|
if (ISSET(sr0, SR0_RBB))
|
|
bus_space_write_4(iot, ioh, SACOM_SR0, SR0_RBB);
|
|
if (ISSET(sr0, SR0_REB)) {
|
|
bus_space_write_4(iot, ioh, SACOM_SR0, SR0_REB);
|
|
#if defined(DDB) || defined(KGDB)
|
|
#ifndef DDB_BREAK_CHAR
|
|
if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
|
|
console_debugger();
|
|
}
|
|
#endif
|
|
#endif /* DDB || KGDB */
|
|
}
|
|
|
|
|
|
end = sc->sc_ebuf;
|
|
put = sc->sc_rbput;
|
|
cc = sc->sc_rbavail;
|
|
|
|
sr1 = bus_space_read_4(iot, ioh, SACOM_SR1);
|
|
if (ISSET(sr0, SR0_RFS | SR0_RID)) {
|
|
if (! ISSET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED)) {
|
|
while (cc > 0) {
|
|
if (!ISSET(sr1, SR1_RNE)) {
|
|
bus_space_write_4(iot, ioh, SACOM_SR0,
|
|
SR0_RID);
|
|
break;
|
|
}
|
|
put[0] = bus_space_read_4(iot, ioh, SACOM_DR);
|
|
put[1] = sr1;
|
|
#if defined(DDB) && defined(DDB_BREAK_CHAR)
|
|
if (put[0] == DDB_BREAK_CHAR &&
|
|
ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
|
|
console_debugger();
|
|
|
|
sr1 = bus_space_read_4(iot, ioh, SACOM_SR1);
|
|
continue;
|
|
}
|
|
#endif
|
|
put += 2;
|
|
if (put >= end)
|
|
put = sc->sc_rbuf;
|
|
cc--;
|
|
|
|
sr1 = bus_space_read_4(iot, ioh, SACOM_SR1);
|
|
}
|
|
|
|
/*
|
|
* Current string of incoming characters ended because
|
|
* no more data was available or we ran out of space.
|
|
* Schedule a receive event if any data was received.
|
|
* If we're out of space, turn off receive interrupts.
|
|
*/
|
|
sc->sc_rbput = put;
|
|
sc->sc_rbavail = cc;
|
|
if (!ISSET(sc->sc_rx_flags, RX_TTY_OVERFLOWED))
|
|
sc->sc_rx_ready = 1;
|
|
|
|
/* XXX do RX hardware flow control */
|
|
|
|
/*
|
|
* If we're out of space, disable receive interrupts
|
|
* until the queue has drained a bit.
|
|
*/
|
|
if (!cc) {
|
|
SET(sc->sc_rx_flags, RX_IBUF_OVERFLOWED);
|
|
CLR(sc->sc_cr3, CR3_RIE);
|
|
bus_space_write_4(iot, ioh, SACOM_CR3,
|
|
sc->sc_cr3);
|
|
}
|
|
} else {
|
|
#ifdef DIAGNOSTIC
|
|
panic("sacomintr: we shouldn't reach here\n");
|
|
#endif
|
|
CLR(sc->sc_cr3, CR3_RIE);
|
|
bus_space_write_4(iot, ioh, SACOM_CR3, sc->sc_cr3);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
sr0 = bus_space_read_4(iot, ioh, SACOM_SR0);
|
|
if (ISSET(sr0, SR0_TFS)) {
|
|
/*
|
|
* If we've delayed a parameter change, do it now, and restart
|
|
* output.
|
|
* XXX sacom_loadchanelregs() waits TX completion,
|
|
* XXX resulting in ~0.1s hang (300bps, 4 bytes) in worst case
|
|
*/
|
|
if (sc->sc_heldchange) {
|
|
sacom_loadchannelregs(sc);
|
|
sc->sc_heldchange = 0;
|
|
sc->sc_tbc = sc->sc_heldtbc;
|
|
sc->sc_heldtbc = 0;
|
|
}
|
|
|
|
/* Output the next chunk of the contiguous buffer, if any. */
|
|
if (sc->sc_tbc > 0) {
|
|
sacom_filltx(sc);
|
|
} else {
|
|
/* Disable transmit completion interrupts if necessary. */
|
|
if (ISSET(sc->sc_cr3, CR3_TIE)) {
|
|
CLR(sc->sc_cr3, CR3_TIE);
|
|
bus_space_write_4(iot, ioh, SACOM_CR3,
|
|
sc->sc_cr3);
|
|
}
|
|
if (sc->sc_tx_busy) {
|
|
sc->sc_tx_busy = 0;
|
|
sc->sc_tx_done = 1;
|
|
}
|
|
}
|
|
}
|
|
COM_UNLOCK(sc);
|
|
|
|
/* Wake up the poller. */
|
|
#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
|
|
softintr_schedule(sc->sc_si);
|
|
#else
|
|
setsoftserial();
|
|
#endif
|
|
|
|
#if NRND > 0 && defined(RND_COM)
|
|
rnd_add_uint32(&sc->rnd_source, iir | lsr);
|
|
#endif
|
|
return (1);
|
|
}
|
|
|
|
/* Initialization for serial console */
|
|
int
|
|
sacominit(iot, iobase, baud, cflag, iohp)
|
|
bus_space_tag_t iot;
|
|
bus_addr_t iobase;
|
|
int baud;
|
|
tcflag_t cflag;
|
|
bus_space_handle_t *iohp;
|
|
{
|
|
int brd, cr0;
|
|
|
|
if (bus_space_map(iot, iobase, SACOM_NPORTS, 0, iohp))
|
|
printf("register map failed\n");
|
|
|
|
/* wait for the Tx queue to drain and disable the UART */
|
|
while(bus_space_read_4(iot, *iohp, SACOM_SR1) & SR1_TBY)
|
|
;
|
|
bus_space_write_4(iot, *iohp, SACOM_CR3, 0);
|
|
|
|
cr0 = cflag2cr0(cflag);
|
|
bus_space_write_4(iot, *iohp, SACOM_CR0, cr0);
|
|
|
|
brd = SACOMSPEED(baud);
|
|
sacomconsrate = baud;
|
|
sacomconsaddr = iobase;
|
|
sacomconscflag = cflag;
|
|
/* XXX assumes little endian */
|
|
bus_space_write_4(iot, *iohp, SACOM_CR1, brd >> 8);
|
|
bus_space_write_4(iot, *iohp, SACOM_CR2, brd & 0xff);
|
|
|
|
/* enable the UART */
|
|
bus_space_write_4(iot, *iohp, SACOM_CR3, CR3_RXE | CR3_TXE);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sacomcnprobe(cp)
|
|
struct consdev *cp;
|
|
{
|
|
cp->cn_pri = CN_REMOTE;
|
|
}
|
|
|
|
void
|
|
sacomcninit(cp)
|
|
struct consdev *cp;
|
|
{
|
|
if (cp == NULL) {
|
|
/* XXX cp == NULL means that MMU is disabled. */
|
|
sacomconsioh = SACOM3_HW_BASE;
|
|
sacomconstag = &sa11x0_bs_tag;
|
|
cn_tab = &sacomcons;
|
|
return;
|
|
}
|
|
|
|
if (sacominit(&sa11x0_bs_tag, CONADDR, CONSPEED,
|
|
CONMODE, &sacomconsioh))
|
|
panic("can't init serial console @%x", CONADDR);
|
|
cn_tab = &sacomcons;
|
|
sacomconstag = &sa11x0_bs_tag;
|
|
}
|
|
|
|
int
|
|
sacomcngetc(dev)
|
|
dev_t dev;
|
|
{
|
|
int c, s;
|
|
|
|
s = spltty(); /* XXX do we need this? */
|
|
|
|
while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1)
|
|
& SR1_RNE)) {
|
|
#if defined(DDB) || defined(KGDB)
|
|
#ifndef DDB_BREAK_CHAR
|
|
u_int sr0;
|
|
extern int db_active;
|
|
|
|
sr0 = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR0);
|
|
if (ISSET(sr0, SR0_RBB))
|
|
bus_space_write_4(sacomconstag, sacomconsioh,
|
|
SACOM_SR0, SR0_RBB);
|
|
if (ISSET(sr0, SR0_REB)) {
|
|
bus_space_write_4(sacomconstag, sacomconsioh,
|
|
SACOM_SR0, SR0_REB);
|
|
if (db_active == 0)
|
|
console_debugger();
|
|
}
|
|
#endif
|
|
#endif /* DDB || KGDB */
|
|
}
|
|
|
|
c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR);
|
|
c &= 0xff;
|
|
splx(s);
|
|
|
|
return (c);
|
|
}
|
|
|
|
void
|
|
sacomcnputc(dev, c)
|
|
dev_t dev;
|
|
int c;
|
|
{
|
|
int s;
|
|
|
|
s = spltty(); /* XXX do we need this? */
|
|
|
|
while(! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1)
|
|
& SR1_TNF))
|
|
;
|
|
|
|
bus_space_write_4(sacomconstag, sacomconsioh, SACOM_DR, c);
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
sacomcnpollc(dev, on)
|
|
dev_t dev;
|
|
int on;
|
|
{
|
|
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
int
|
|
sacomcncharpoll()
|
|
{
|
|
int c;
|
|
|
|
if (! (bus_space_read_4(sacomconstag, sacomconsioh, SACOM_SR1)
|
|
& SR1_RNE))
|
|
return -1;
|
|
|
|
c = bus_space_read_4(sacomconstag, sacomconsioh, SACOM_DR);
|
|
c &= 0xff;
|
|
|
|
return (c);
|
|
}
|
|
|
|
#endif
|
|
|
|
/* helper function to identify the com ports used by
|
|
console or KGDB (and not yet autoconf attached) */
|
|
int
|
|
sacom_is_console(iot, iobase, ioh)
|
|
bus_space_tag_t iot;
|
|
bus_addr_t iobase;
|
|
bus_space_handle_t *ioh;
|
|
{
|
|
bus_space_handle_t help;
|
|
|
|
if (! sacomconsattached &&
|
|
iot == sacomconstag && iobase == sacomconsaddr)
|
|
help = sacomconsioh;
|
|
else
|
|
return (0);
|
|
|
|
if (ioh)
|
|
*ioh = help;
|
|
return (1);
|
|
}
|