207 lines
6.4 KiB
C
207 lines
6.4 KiB
C
/* $NetBSD: com_isa.c,v 1.24 2005/12/11 12:22:02 christos Exp $ */
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/*-
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* Copyright (c) 1998 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 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. 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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: com_isa.c,v 1.24 2005/12/11 12:22:02 christos Exp $");
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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/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/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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int com_isa_probe(struct device *, struct cfdata *, void *);
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void com_isa_attach(struct device *, struct device *, void *);
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void com_isa_cleanup(void *);
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CFATTACH_DECL(com_isa, sizeof(struct com_isa_softc),
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com_isa_probe, com_isa_attach, NULL, NULL);
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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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struct cfdata *match;
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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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if (ia->ia_nio < 1)
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return (0);
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if (ia->ia_nirq < 1)
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return (0);
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if (ISA_DIRECT_CONFIG(ia))
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return (0);
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/* Disallow wildcarded i/o address. */
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if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
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return (0);
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/* Don't allow wildcarded IRQ. */
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if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
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return (0);
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iot = ia->ia_iot;
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iobase = ia->ia_io[0].ir_addr;
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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);
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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_nio = 1;
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ia->ia_io[0].ir_size = COM_NPORTS;
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ia->ia_nirq = 1;
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ia->ia_niomem = 0;
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ia->ia_ndrq = 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_io[0].ir_addr;
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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[0].ir_irq;
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com_attach_subr(sc);
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isc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE, IPL_SERIAL,
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comintr, sc);
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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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