NetBSD/sys/arch/arm32/mainbus/com_pioc.c

220 lines
5.8 KiB
C

/* $NetBSD: com_pioc.c,v 1.2 1997/10/16 18:37:38 mark 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/irqhandler.h>
#include <machine/bus.h>
#include <arm32/mainbus/piocvar.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include "locators.h"
struct com_pioc_softc {
struct com_softc sc_com; /* real "com" softc */
void *sc_ih; /* interrupt handler */
};
/* Prototypes for functions */
static int com_pioc_probe __P((struct device *, struct cfdata *, void *));
static void com_pioc_attach __P((struct device *, struct device *, void *));
static void com_pioc_cleanup __P((void *));
/* device attach structure */
struct cfattach com_pioc_ca = {
sizeof(struct com_pioc_softc), com_pioc_probe, com_pioc_attach
};
/*
* int com_pioc_probe(struct device *parent, struct cfdata *cf, void *aux)
*
* Make sure we are trying to attach a com device and then
* probe for one.
*/
static int
com_pioc_probe(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
bus_space_tag_t iot;
bus_space_handle_t ioh;
int iobase;
int rv = 1;
struct pioc_attach_args *pa = aux;
/* We need an offset */
if (pa->pa_offset == PIOCCF_OFFSET_DEFAULT)
return(0);
iot = pa->pa_iot;
iobase = pa->pa_iobase + pa->pa_offset;
/* 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) {
pa->pa_iosize = COM_NPORTS;
}
return (rv);
}
/*
* void com_pioc_attach(struct device *parent, struct device *self, void *aux)
*
* attach the com device
*/
static void
com_pioc_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct com_pioc_softc *psc = (void *)self;
struct com_softc *sc = &psc->sc_com;
u_int iobase;
bus_space_tag_t iot;
struct pioc_attach_args *pa = aux;
int count;
iot = sc->sc_iot = pa->pa_iot;
iobase = sc->sc_iobase = pa->pa_iobase + pa->pa_offset;
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;
com_attach_subr(sc);
if (pa->pa_irq != MAINBUSCF_IRQ_DEFAULT) {
psc->sc_ih = intr_claim(pa->pa_irq, IPL_TTY, "com",
comintr, sc);
}
/*
* Shutdown hook for buggy BIOSs that don't recognize the UART
* without a disabled FIFO.
*/
if (shutdownhook_establish(com_pioc_cleanup, sc) == NULL)
panic("%s: could not establish shutdown hook",
sc->sc_dev.dv_xname);
/*
* This is a patch for bugged revision 1-4 SMC FDC37C665
* I/O controllers.
* If there is RX data pending when the FIFO in turned on
* the RX register cannot be emptied.
*
* Solution:
* Make sure FIFO is off.
* Read pending data / int status etc.
*/
bus_space_write_1(iot, sc->sc_ioh, com_fifo, 0);
for (count = 0; count < 8; ++count)
(void)bus_space_read_1(iot, sc->sc_ioh, count);
}
/*
* void com_pioc_cleanup(void *arg)
*
* clean up driver
*/
static void
com_pioc_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);
}
/*
* XXX - temporary
*
* Temporary measure to implement splserial and softserial handling.
* These are new with the new serial driver and require mods to the
* interrupt code so for initial testing of the new driver
* emulate them.
*/
void comsoft __P((void *));
int splserial(s)
int s;
{
return(spltty());
}
void
setsoftserial()
{
timeout(comsoft, NULL, 1);
}
/* End of com_pioc.c */