170 lines
4.7 KiB
C
170 lines
4.7 KiB
C
/* $NetBSD: com_isa.c,v 1.10 1997/10/20 18:43:08 thorpej Exp $ */
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/*-
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* Copyright (c) 1993, 1994, 1995, 1996
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* Charles M. Hannum. All rights reserved.
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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 <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 <machine/intr.h>
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#include <machine/bus.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#include <dev/isa/isavar.h>
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struct com_isa_softc {
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struct com_softc sc_com; /* real "com" softc */
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/* ISA-specific goo. */
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void *sc_ih; /* interrupt handler */
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};
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#ifdef __BROKEN_INDIRECT_CONFIG
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int com_isa_probe __P((struct device *, void *, void *));
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#else
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int com_isa_probe __P((struct device *, struct cfdata *, void *));
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#endif
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void com_isa_attach __P((struct device *, struct device *, void *));
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void com_isa_cleanup __P((void *));
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struct cfattach com_isa_ca = {
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sizeof(struct com_isa_softc), com_isa_probe, com_isa_attach
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};
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int
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com_isa_probe(parent, match, aux)
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struct device *parent;
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#ifdef __BROKEN_INDIRECT_CONFIG
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void *match;
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#else
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struct cfdata *match;
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#endif
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void *aux;
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{
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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int iobase;
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int rv = 1;
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struct isa_attach_args *ia = aux;
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/* Disallow wildcarded i/o address. */
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if (ia->ia_iobase == ISACF_PORT_DEFAULT)
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return (0);
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iot = ia->ia_iot;
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iobase = ia->ia_iobase;
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/* if it's in use as console, it's there. */
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if (!com_is_console(iot, iobase, 0)) {
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if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
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return 0;
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}
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rv = comprobe1(iot, ioh, iobase);
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bus_space_unmap(iot, ioh, COM_NPORTS);
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}
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if (rv) {
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ia->ia_iosize = COM_NPORTS;
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ia->ia_msize = 0;
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}
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return (rv);
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}
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void
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com_isa_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct com_isa_softc *isc = (void *)self;
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struct com_softc *sc = &isc->sc_com;
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int iobase, irq;
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bus_space_tag_t iot;
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struct isa_attach_args *ia = aux;
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/*
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* We're living on an isa.
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*/
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iobase = sc->sc_iobase = ia->ia_iobase;
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iot = sc->sc_iot = ia->ia_iot;
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if (!com_is_console(iot, iobase, &sc->sc_ioh) &&
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bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh)) {
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printf(": can't map i/o space\n");
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return;
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}
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sc->sc_frequency = COM_FREQ;
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irq = ia->ia_irq;
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com_attach_subr(sc);
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if (irq != IRQUNK) {
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isc->sc_ih = isa_intr_establish(ia->ia_ic, irq,
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IST_EDGE, IPL_SERIAL, comintr, sc);
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}
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/*
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* Shutdown hook for buggy BIOSs that don't recognize the UART
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* without a disabled FIFO.
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*/
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if (shutdownhook_establish(com_isa_cleanup, sc) == NULL)
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panic("com_isa_attach: could not establish shutdown hook");
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}
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void
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com_isa_cleanup(arg)
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void *arg;
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{
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struct com_softc *sc = arg;
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if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
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bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0);
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}
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