250 lines
6.3 KiB
C
250 lines
6.3 KiB
C
/*-
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* Copyright (c) 2008 TAKAHASHI Yoshihiro
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <pc98/cbus/cbus.h>
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#include <isa/isavar.h>
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/*
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* modified for PC98 by Kakefuda
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*/
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/*
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* RTC support routines
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*/
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static void rtc_serialcombit(int);
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static void rtc_serialcom(int);
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static int rtc_inb(void);
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static void rtc_outb(int);
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static void
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rtc_serialcombit(int i)
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{
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outb(IO_RTC, ((i&0x01)<<5)|0x07);
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DELAY(1);
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outb(IO_RTC, ((i&0x01)<<5)|0x17);
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DELAY(1);
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outb(IO_RTC, ((i&0x01)<<5)|0x07);
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DELAY(1);
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}
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static void
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rtc_serialcom(int i)
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{
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rtc_serialcombit(i&0x01);
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rtc_serialcombit((i&0x02)>>1);
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rtc_serialcombit((i&0x04)>>2);
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rtc_serialcombit((i&0x08)>>3);
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outb(IO_RTC, 0x07);
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DELAY(1);
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outb(IO_RTC, 0x0f);
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DELAY(1);
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outb(IO_RTC, 0x07);
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DELAY(1);
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}
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static void
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rtc_outb(int val)
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{
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int s;
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int sa = 0;
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for (s=0;s<8;s++) {
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sa = ((val >> s) & 0x01) ? 0x27 : 0x07;
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outb(IO_RTC, sa); /* set DI & CLK 0 */
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DELAY(1);
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outb(IO_RTC, sa | 0x10); /* CLK 1 */
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DELAY(1);
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}
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outb(IO_RTC, sa & 0xef); /* CLK 0 */
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}
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static int
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rtc_inb(void)
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{
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int s;
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int sa = 0;
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for (s=0;s<8;s++) {
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sa |= ((inb(0x33) & 0x01) << s);
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outb(IO_RTC, 0x17); /* CLK 1 */
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DELAY(1);
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outb(IO_RTC, 0x07); /* CLK 0 */
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DELAY(2);
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}
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return sa;
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}
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/**********************************************************************
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* RTC driver for subr_rtc
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*/
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#include "clock_if.h"
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#include <sys/rman.h>
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struct pcrtc_softc {
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int port_rid1, port_rid2;
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struct resource *port_res1, *port_res2;
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};
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/*
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* Attach to the ISA PnP descriptors for the timer and realtime clock.
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*/
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static struct isa_pnp_id pcrtc_ids[] = {
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{ 0x000bd041 /* PNP0B00 */, "AT realtime clock" },
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{ 0 }
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};
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static int
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pcrtc_probe(device_t dev)
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{
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int result;
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device_set_desc(dev, "PC Real Time Clock");
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result = ISA_PNP_PROBE(device_get_parent(dev), dev, pcrtc_ids);
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/* ENXIO if wrong PnP-ID, ENOENT ifno PnP-ID, zero if good PnP-iD */
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if (result != ENOENT)
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return(result);
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/* All PC's have an RTC, and we're hosed without it, so... */
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return (BUS_PROBE_LOW_PRIORITY);
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}
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static int
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pcrtc_attach(device_t dev)
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{
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struct pcrtc_softc *sc;
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/*
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* Not that we need them or anything, but grab our resources
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* so they show up, correctly attributed, in the big picture.
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*/
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sc = device_get_softc(dev);
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sc->port_rid1 = 0;
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bus_set_resource(dev, SYS_RES_IOPORT, sc->port_rid1, IO_RTC, 1);
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if (!(sc->port_res1 = bus_alloc_resource(dev, SYS_RES_IOPORT,
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&sc->port_rid1, IO_RTC, IO_RTC, 1, RF_ACTIVE)))
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device_printf(dev, "Warning: Couldn't map I/O.\n");
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sc->port_rid2 = 1;
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bus_set_resource(dev, SYS_RES_IOPORT, sc->port_rid2, 0x33, 1);
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if (!(sc->port_res2 = bus_alloc_resource(dev, SYS_RES_IOPORT,
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&sc->port_rid2, 0x33, 0x33, 1, RF_ACTIVE)))
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device_printf(dev, "Warning: Couldn't map I/O.\n");
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clock_register(dev, 1000000);
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return(0);
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}
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static int
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pcrtc_settime(device_t dev __unused, struct timespec *ts)
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{
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struct clocktime ct;
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clock_ts_to_ct(ts, &ct);
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rtc_serialcom(0x01); /* Register shift command. */
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rtc_outb(bin2bcd(ct.sec)); /* Write back Seconds */
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rtc_outb(bin2bcd(ct.min)); /* Write back Minutes */
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rtc_outb(bin2bcd(ct.hour)); /* Write back Hours */
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rtc_outb(bin2bcd(ct.day)); /* Write back Day */
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rtc_outb((ct.mon << 4) | ct.dow); /* Write back Month and DOW */
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rtc_outb(bin2bcd(ct.year % 100)); /* Write back Year */
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rtc_serialcom(0x02); /* Time set & Counter hold command. */
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rtc_serialcom(0x00); /* Register hold command. */
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return (0);
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}
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static int
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pcrtc_gettime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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int i;
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rtc_serialcom(0x03); /* Time Read */
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rtc_serialcom(0x01); /* Register shift command. */
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DELAY(20);
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ct.nsec = 0;
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ct.sec = bcd2bin(rtc_inb() & 0xff); /* sec */
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ct.min = bcd2bin(rtc_inb() & 0xff); /* min */
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ct.hour = bcd2bin(rtc_inb() & 0xff); /* hour */
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ct.day = bcd2bin(rtc_inb() & 0xff); /* date */
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i = rtc_inb();
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ct.dow = i & 0x0f; /* dow */
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ct.mon = (i >> 4) & 0x0f; /* month */
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ct.year = bcd2bin(rtc_inb() & 0xff) + 1900; /* year */
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if (ct.year < 1995)
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ct.year += 100;
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/* Set dow = -1 because some clocks don't set it correctly. */
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ct.dow = -1;
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return (clock_ct_to_ts(&ct, ts));
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}
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static device_method_t pcrtc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, pcrtc_probe),
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DEVMETHOD(device_attach, pcrtc_attach),
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DEVMETHOD(device_detach, bus_generic_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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/* XXX stop statclock? */
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DEVMETHOD(device_resume, bus_generic_resume),
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/* XXX restart statclock? */
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/* clock interface */
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DEVMETHOD(clock_gettime, pcrtc_gettime),
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DEVMETHOD(clock_settime, pcrtc_settime),
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{ 0, 0 }
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};
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static driver_t pcrtc_driver = {
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"pcrtc",
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pcrtc_methods,
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sizeof(struct pcrtc_softc),
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};
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static devclass_t pcrtc_devclass;
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DRIVER_MODULE(pcrtc, isa, pcrtc_driver, pcrtc_devclass, 0, 0);
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