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/*-
* Copyright (c) 2008 TAKAHASHI Yoshihiro
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/clock.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <pc98/cbus/cbus.h>
#include <isa/isavar.h>
/*
* modified for PC98 by Kakefuda
*/
/*
* RTC support routines
*/
static void rtc_serialcombit(int);
static void rtc_serialcom(int);
static int rtc_inb(void);
static void rtc_outb(int);
static void
rtc_serialcombit(int i)
{
outb(IO_RTC, ((i&0x01)<<5)|0x07);
DELAY(1);
outb(IO_RTC, ((i&0x01)<<5)|0x17);
DELAY(1);
outb(IO_RTC, ((i&0x01)<<5)|0x07);
DELAY(1);
}
static void
rtc_serialcom(int i)
{
rtc_serialcombit(i&0x01);
rtc_serialcombit((i&0x02)>>1);
rtc_serialcombit((i&0x04)>>2);
rtc_serialcombit((i&0x08)>>3);
outb(IO_RTC, 0x07);
DELAY(1);
outb(IO_RTC, 0x0f);
DELAY(1);
outb(IO_RTC, 0x07);
DELAY(1);
}
static void
rtc_outb(int val)
{
int s;
int sa = 0;
for (s=0;s<8;s++) {
sa = ((val >> s) & 0x01) ? 0x27 : 0x07;
outb(IO_RTC, sa); /* set DI & CLK 0 */
DELAY(1);
outb(IO_RTC, sa | 0x10); /* CLK 1 */
DELAY(1);
}
outb(IO_RTC, sa & 0xef); /* CLK 0 */
}
static int
rtc_inb(void)
{
int s;
int sa = 0;
for (s=0;s<8;s++) {
sa |= ((inb(0x33) & 0x01) << s);
outb(IO_RTC, 0x17); /* CLK 1 */
DELAY(1);
outb(IO_RTC, 0x07); /* CLK 0 */
DELAY(2);
}
return sa;
}
/**********************************************************************
* RTC driver for subr_rtc
*/
#include "clock_if.h"
#include <sys/rman.h>
struct pcrtc_softc {
int port_rid1, port_rid2;
struct resource *port_res1, *port_res2;
};
/*
* Attach to the ISA PnP descriptors for the timer and realtime clock.
*/
static struct isa_pnp_id pcrtc_ids[] = {
{ 0x000bd041 /* PNP0B00 */, "AT realtime clock" },
{ 0 }
};
static int
pcrtc_probe(device_t dev)
{
int result;
device_set_desc(dev, "PC Real Time Clock");
result = ISA_PNP_PROBE(device_get_parent(dev), dev, pcrtc_ids);
/* ENXIO if wrong PnP-ID, ENOENT ifno PnP-ID, zero if good PnP-iD */
if (result != ENOENT)
return(result);
/* All PC's have an RTC, and we're hosed without it, so... */
return (BUS_PROBE_LOW_PRIORITY);
}
static int
pcrtc_attach(device_t dev)
{
struct pcrtc_softc *sc;
/*
* Not that we need them or anything, but grab our resources
* so they show up, correctly attributed, in the big picture.
*/
sc = device_get_softc(dev);
sc->port_rid1 = 0;
bus_set_resource(dev, SYS_RES_IOPORT, sc->port_rid1, IO_RTC, 1);
if (!(sc->port_res1 = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->port_rid1, IO_RTC, IO_RTC, 1, RF_ACTIVE)))
device_printf(dev, "Warning: Couldn't map I/O.\n");
sc->port_rid2 = 1;
bus_set_resource(dev, SYS_RES_IOPORT, sc->port_rid2, 0x33, 1);
if (!(sc->port_res2 = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->port_rid2, 0x33, 0x33, 1, RF_ACTIVE)))
device_printf(dev, "Warning: Couldn't map I/O.\n");
clock_register(dev, 1000000);
return(0);
}
static int
pcrtc_settime(device_t dev __unused, struct timespec *ts)
{
struct clocktime ct;
clock_ts_to_ct(ts, &ct);
rtc_serialcom(0x01); /* Register shift command. */
rtc_outb(bin2bcd(ct.sec)); /* Write back Seconds */
rtc_outb(bin2bcd(ct.min)); /* Write back Minutes */
rtc_outb(bin2bcd(ct.hour)); /* Write back Hours */
rtc_outb(bin2bcd(ct.day)); /* Write back Day */
rtc_outb((ct.mon << 4) | ct.dow); /* Write back Month and DOW */
rtc_outb(bin2bcd(ct.year % 100)); /* Write back Year */
rtc_serialcom(0x02); /* Time set & Counter hold command. */
rtc_serialcom(0x00); /* Register hold command. */
return (0);
}
static int
pcrtc_gettime(device_t dev, struct timespec *ts)
{
struct clocktime ct;
int i;
rtc_serialcom(0x03); /* Time Read */
rtc_serialcom(0x01); /* Register shift command. */
DELAY(20);
ct.nsec = 0;
ct.sec = bcd2bin(rtc_inb() & 0xff); /* sec */
ct.min = bcd2bin(rtc_inb() & 0xff); /* min */
ct.hour = bcd2bin(rtc_inb() & 0xff); /* hour */
ct.day = bcd2bin(rtc_inb() & 0xff); /* date */
i = rtc_inb();
ct.dow = i & 0x0f; /* dow */
ct.mon = (i >> 4) & 0x0f; /* month */
ct.year = bcd2bin(rtc_inb() & 0xff) + 1900; /* year */
if (ct.year < 1995)
ct.year += 100;
/* Set dow = -1 because some clocks don't set it correctly. */
ct.dow = -1;
return (clock_ct_to_ts(&ct, ts));
}
static device_method_t pcrtc_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, pcrtc_probe),
DEVMETHOD(device_attach, pcrtc_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
/* XXX stop statclock? */
DEVMETHOD(device_resume, bus_generic_resume),
/* XXX restart statclock? */
/* clock interface */
DEVMETHOD(clock_gettime, pcrtc_gettime),
DEVMETHOD(clock_settime, pcrtc_settime),
{ 0, 0 }
};
static driver_t pcrtc_driver = {
"pcrtc",
pcrtc_methods,
sizeof(struct pcrtc_softc),
};
static devclass_t pcrtc_devclass;
DRIVER_MODULE(pcrtc, isa, pcrtc_driver, pcrtc_devclass, 0, 0);
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