NetBSD/sys/dev/isa/com_isa.c

155 lines
4.4 KiB
C

/* $NetBSD: com_isa.c,v 1.6 1997/09/16 20:34:25 is Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995, 1996
* Charles M. Hannum. All rights reserved.
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)com.c 7.5 (Berkeley) 5/16/91
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/types.h>
#include <sys/device.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <dev/isa/isavar.h>
#include <dev/isa/comreg.h>
#include <dev/isa/comvar.h>
#ifdef __BROKEN_INDIRECT_CONFIG
int com_isa_probe __P((struct device *, void *, void *));
#else
int com_isa_probe __P((struct device *, struct cfdata *, void *));
#endif
void com_isa_attach __P((struct device *, struct device *, void *));
void com_isa_cleanup __P((void *));
struct cfattach com_isa_ca = {
sizeof(struct com_softc), com_isa_probe, com_isa_attach
};
int
com_isa_probe(parent, match, aux)
struct device *parent;
#ifdef __BROKEN_INDIRECT_CONFIG
void *match;
#else
struct cfdata *match;
#endif
void *aux;
{
bus_space_tag_t iot;
bus_space_handle_t ioh;
int iobase;
int rv = 1;
struct isa_attach_args *ia = aux;
iot = ia->ia_iot;
iobase = ia->ia_iobase;
/* if it's in use as console, it's there. */
if (!com_is_console(iot, iobase, 0)) {
if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
return 0;
}
rv = comprobe1(iot, ioh, iobase);
bus_space_unmap(iot, ioh, COM_NPORTS);
}
if (rv) {
ia->ia_iosize = COM_NPORTS;
ia->ia_msize = 0;
}
return (rv);
}
void
com_isa_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct com_softc *sc = (void *)self;
int iobase, irq;
bus_space_tag_t iot;
struct isa_attach_args *ia = aux;
/*
* We're living on an isa.
*/
iobase = sc->sc_iobase = ia->ia_iobase;
iot = sc->sc_iot = ia->ia_iot;
if(!com_is_console(iot, iobase, &sc->sc_ioh)
&& bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh))
panic("comattach: io mapping failed");
sc->sc_frequency = COM_FREQ;
irq = ia->ia_irq;
com_attach_subr(sc);
if (irq != IRQUNK) {
sc->sc_ih = isa_intr_establish(ia->ia_ic, irq,
IST_EDGE, IPL_SERIAL, comintr, sc);
}
/*
* Shutdown hook for buggy BIOSs that don't recognize the UART
* without a disabled FIFO.
*/
if (shutdownhook_establish(com_isa_cleanup, sc) == NULL)
panic("comisa: could not establish shutdown hook");
}
void
com_isa_cleanup(arg)
void *arg;
{
struct com_softc *sc = arg;
if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0);
}