273 lines
7.8 KiB
C
273 lines
7.8 KiB
C
/* $NetBSD: com_pioc.c,v 1.9 2003/08/07 16:26:29 agc 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/param.h>
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__KERNEL_RCSID(0, "$NetBSD: com_pioc.c,v 1.9 2003/08/07 16:26:29 agc Exp $");
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#include <sys/systm.h>
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#include <sys/tty.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <sys/kernel.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 <machine/io.h>
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#include <acorn32/mainbus/piocvar.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/cons.h>
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#include "locators.h"
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struct com_pioc_softc {
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struct com_softc sc_com; /* real "com" softc */
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void *sc_ih; /* interrupt handler */
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};
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/* Prototypes for functions */
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cons_decl(com);
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static int com_pioc_probe __P((struct device *, struct cfdata *, void *));
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static void com_pioc_attach __P((struct device *, struct device *, void *));
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static void com_pioc_cleanup __P((void *));
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/* device attach structure */
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CFATTACH_DECL(com_pioc, sizeof(struct com_pioc_softc),
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com_pioc_probe, com_pioc_attach, NULL, NULL);
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extern bus_space_tag_t comconstag; /* From pioc.c */
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/*
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* int com_pioc_probe(struct device *parent, struct cfdata *cf, void *aux)
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*
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* Make sure we are trying to attach a com device and then
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* probe for one.
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*/
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static int
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com_pioc_probe(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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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 pioc_attach_args *pa = aux;
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/* We need an offset */
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if (pa->pa_offset == PIOCCF_OFFSET_DEFAULT)
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return(0);
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iot = pa->pa_iot;
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iobase = pa->pa_iobase + pa->pa_offset;
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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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pa->pa_iosize = COM_NPORTS;
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}
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return (rv);
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}
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/*
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* void com_pioc_attach(struct device *parent, struct device *self, void *aux)
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*
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* attach the com device
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*/
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static void
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com_pioc_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_pioc_softc *psc = (void *)self;
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struct com_softc *sc = &psc->sc_com;
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u_int iobase;
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bus_space_tag_t iot;
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struct pioc_attach_args *pa = aux;
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int count;
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iot = sc->sc_iot = pa->pa_iot;
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iobase = sc->sc_iobase = pa->pa_iobase + pa->pa_offset;
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/*
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printf(" (iot = %p, iobase = 0x%08x) ", iot, iobase);
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*/
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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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panic("comattach: io mapping failed");
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sc->sc_frequency = COM_FREQ;
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com_attach_subr(sc);
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if (pa->pa_irq != MAINBUSCF_IRQ_DEFAULT) {
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psc->sc_ih = intr_claim(pa->pa_irq, IPL_SERIAL, "com",
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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_pioc_cleanup, sc) == NULL)
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panic("%s: could not establish shutdown hook",
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sc->sc_dev.dv_xname);
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/*
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* This is a patch for bugged revision 1-4 SMC FDC37C665
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* I/O controllers.
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* If there is RX data pending when the FIFO in turned on
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* the RX register cannot be emptied.
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*
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* Solution:
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* Make sure FIFO is off.
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* Read pending data / int status etc.
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*/
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bus_space_write_1(iot, sc->sc_ioh, com_fifo, 0);
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for (count = 0; count < 8; ++count)
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(void)bus_space_read_1(iot, sc->sc_ioh, count);
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}
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/*
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* void com_pioc_cleanup(void *arg)
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*
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* clean up driver
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*/
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static void
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com_pioc_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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/*
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* Console attachment functions
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*/
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void
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comcnprobe(cp)
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struct consdev *cp;
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{
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#ifdef COMCONSOLE
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cp->cn_pri = CN_REMOTE; /* Force a serial port console */
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#else
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cp->cn_pri = CN_NORMAL;
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#endif
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}
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void
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comcninit(cp)
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struct consdev *cp;
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{
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int result;
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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 38400
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#endif
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#ifndef CONADDR
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#define CONADDR 0x3f8
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#endif
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result = comcnattach(comconstag, (IO_CONF_BASE + CONADDR), CONSPEED,
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COM_FREQ, COM_TYPE_NORMAL, CONMODE);
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if (result) {
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printf("initialising serial; got errornr %d\n", result);
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panic("can't init serial console @%x", CONADDR);
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};
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}
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/* End of com_pioc.c */
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