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/* $OpenBSD: com_obio.c,v 1.1 2005/07/17 12:22:42 miod Exp $ */
/*
* Copyright (c) 2005, Miodrag Vallat.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Driver for the built-in modem on Tadpole SPARCbooks, which provides a
* 16C450-compatible interface. Later models apparently are 16550A-compatible
* (i.e. with a 16 byte FIFO).
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/tty.h>
#include <machine/bus.h>
#include <sparc/sparc/auxioreg.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
int com_obio_match(struct device *, void *, void *);
void com_obio_attach(struct device *, struct device *, void *);
struct com_obio_softc {
struct com_softc sc_com;
struct intrhand sc_ih;
struct rom_reg sc_reg;
int sc_pwr;
};
struct cfattach com_obio_ca = {
sizeof(struct com_obio_softc), com_obio_match, com_obio_attach
};
void com_obio_disable(struct com_softc *);
int com_obio_enable(struct com_softc *);
int
com_obio_match(struct device *parent, void *match, void *aux)
{
struct confargs *ca = aux;
return (strcmp("modem", ca->ca_ra.ra_name) == 0);
}
void
com_obio_attach(struct device *parent, struct device *self, void *aux)
{
struct confargs *ca = aux;
struct com_softc *sc = (void *)self;
struct com_obio_softc *osc = (void *)sc;
/* build a bus tag */
osc->sc_reg = ca->ca_ra.ra_reg[0];
#if 0 /* not necessary as we don't compile com console support */
sc->sc_iobase = -1;
#endif
sc->sc_iot = &osc->sc_reg;
if (ca->ca_ra.ra_nreg == 0 || bus_space_map(sc->sc_iot, 0,
ca->ca_ra.ra_len, 0, &sc->sc_ioh) != 0) {
printf(": can't map modem registers\n");
return;
}
osc->sc_ih.ih_fun = comintr;
osc->sc_ih.ih_arg = sc;
intr_establish(ca->ca_ra.ra_intr[0].int_pri, &osc->sc_ih, -1,
self->dv_xname);
printf(" pri %d", ca->ca_ra.ra_intr[0].int_pri);
sc->disable = com_obio_disable;
sc->enable = com_obio_enable;
osc->sc_pwr = getpropint(ca->ca_ra.ra_node, "pwr-on-auxio", 0);
com_obio_enable(sc);
sc->enabled = 1;
sc->sc_frequency = COM_FREQ;
com_attach_subr(sc);
}
void
com_obio_disable(struct com_softc *sc)
{
struct com_obio_softc *osc = (void *)sc;
if (osc->sc_pwr) {
sb_auxregbisc(0, 0, AUXIO_MODEM | AUXIO_MODEM_RESET);
}
}
int
com_obio_enable(struct com_softc *sc)
{
struct com_obio_softc *osc = (void *)sc;
if (osc->sc_pwr) {
/* enable and reset modem for 20 usec */
sb_auxregbisc(0, AUXIO_MODEM, AUXIO_MODEM_RESET);
delay(20);
/* end reset (active low) */
sb_auxregbisc(0, AUXIO_MODEM_RESET, 0);
/* give the device some time to settle */
delay(100);
}
return (0);
}
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