NetBSD-5.0.2/sys/arch/acorn32/mainbus/com_pioc.c
/* $NetBSD: com_pioc.c,v 1.14 2008/04/28 20:23:09 martin Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*-
* 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. 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>
__KERNEL_RCSID(0, "$NetBSD: com_pioc.c,v 1.14 2008/04/28 20:23:09 martin Exp $");
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <machine/io.h>
#include <acorn32/mainbus/piocvar.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <dev/cons.h>
#include "locators.h"
struct com_pioc_softc {
struct com_softc sc_com; /* real "com" softc */
void *sc_ih; /* interrupt handler */
};
/* Prototypes for functions */
cons_decl(com);
static int com_pioc_probe (device_t, cfdata_t , void *);
static void com_pioc_attach (device_t, device_t, void *);
/* device attach structure */
CFATTACH_DECL_NEW(com_pioc, sizeof(struct com_pioc_softc),
com_pioc_probe, com_pioc_attach, NULL, NULL);
extern bus_space_tag_t comconstag; /* From pioc.c */
/*
* 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(device_t parent, cfdata_t 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);
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(device_t parent, device_t self, void *aux)
{
struct com_pioc_softc *psc = device_private(self);
struct com_softc *sc = &psc->sc_com;
u_int iobase;
bus_space_tag_t iot;
bus_space_handle_t ioh;
struct pioc_attach_args *pa = aux;
int count;
sc->sc_dev = self;
iot = pa->pa_iot;
iobase = pa->pa_iobase + pa->pa_offset;
/*
printf(" (iot = %p, iobase = 0x%08x) ", iot, iobase);
*/
if (!com_is_console(iot, iobase, &ioh)
&& bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh))
panic("comattach: io mapping failed");
COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
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_SERIAL, "com",
comintr, sc);
}
if (!pmf_device_register1(self, com_suspend, com_resume, com_cleanup)) {
aprint_error_dev(self,
"could not establish shutdown hook");
}
/*
* 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, ioh, com_fifo, 0);
for (count = 0; count < 8; ++count)
(void)bus_space_read_1(iot, ioh, count);
}
/*
* Console attachment functions
*/
void
comcnprobe(struct consdev *cp)
{
#ifdef COMCONSOLE
cp->cn_pri = CN_REMOTE; /* Force a serial port console */
#else
cp->cn_pri = CN_NORMAL;
#endif
}
void
comcninit(struct consdev *cp)
{
int result;
#ifndef CONMODE
#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
#endif
#ifndef CONSPEED
#define CONSPEED 38400
#endif
#ifndef CONADDR
#define CONADDR 0x3f8
#endif
result = comcnattach(comconstag, (IO_CONF_BASE + CONADDR), CONSPEED,
COM_FREQ, COM_TYPE_NORMAL, CONMODE);
if (result) {
printf("initialising serial; got errornr %d\n", result);
panic("can't init serial console @%x", CONADDR);
};
}
/* End of com_pioc.c */