mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
635435f4f6
time-of-day clocks, ported from NetBSD. The front-ends are expected to be at least partly machine-dependent; the sparc64 EBus and SBus ones will be commited to MD directories for now (in a subsequent commit).
212 lines
6.6 KiB
C
212 lines
6.6 KiB
C
/*-
|
|
* Copyright (c) 2000 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Paul Kranenburg.
|
|
*
|
|
* 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 NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation 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 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.
|
|
*
|
|
* $NetBSD: mk48txx.c,v 1.7 2001/04/08 17:05:10 tsutsui Exp $
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/clock.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <mk48txx/mk48txxreg.h>
|
|
|
|
#include "clock_if.h"
|
|
|
|
struct mk48txx_softc {
|
|
bus_space_tag_t mk_bt; /* bus tag & handle */
|
|
bus_space_handle_t mk_bh; /* */
|
|
bus_size_t mk_nvramsz; /* Size of NVRAM on the chip */
|
|
bus_size_t mk_clkoffset; /* Offset in NVRAM to clock bits */
|
|
u_int mk_year0; /* What year is represented on the system
|
|
by the chip's year counter at 0 */
|
|
};
|
|
|
|
int mk48txx_auto_century_adjust = 1;
|
|
|
|
struct {
|
|
const char *name;
|
|
bus_size_t nvramsz;
|
|
bus_size_t clkoff;
|
|
int flags;
|
|
#define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */
|
|
} mk48txx_models[] = {
|
|
{ "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
|
|
{ "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
|
|
{ "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
|
|
};
|
|
|
|
int
|
|
mk48txx_attach(device_t dev, bus_space_tag_t bt, bus_space_handle_t bh,
|
|
const char *model, int year0)
|
|
{
|
|
struct mk48txx_softc *sc;
|
|
bus_size_t clkoff = 0, nvramsz = 0;
|
|
int i;
|
|
|
|
device_printf(dev, "model %s", model);
|
|
i = sizeof(mk48txx_models) / sizeof(mk48txx_models[0]);
|
|
while (--i >= 0) {
|
|
if (strcmp(model, mk48txx_models[i].name) == 0) {
|
|
nvramsz = mk48txx_models[i].nvramsz;
|
|
clkoff = mk48txx_models[i].clkoff;
|
|
break;
|
|
}
|
|
}
|
|
if (i < 0) {
|
|
device_printf(dev, " (unsupported)\n");
|
|
return (ENXIO);
|
|
}
|
|
printf("\n");
|
|
|
|
sc = malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT);
|
|
sc->mk_bt = bt;
|
|
sc->mk_bh = bh;
|
|
sc->mk_nvramsz = nvramsz;
|
|
sc->mk_clkoffset = clkoff;
|
|
sc->mk_year0 = year0;
|
|
device_set_softc(dev, sc);
|
|
clock_register(dev, 1000000); /* 1 second resolution. */
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Get time-of-day and convert to a `struct timespec'
|
|
* Return 0 on success; an error number otherwise.
|
|
*/
|
|
int
|
|
mk48txx_gettime(device_t dev, struct timespec *ts)
|
|
{
|
|
struct mk48txx_softc *mk = device_get_softc(dev);
|
|
bus_space_tag_t bt = mk->mk_bt;
|
|
bus_space_handle_t bh = mk->mk_bh;
|
|
bus_size_t clkoff = mk->mk_clkoffset;
|
|
struct clocktime ct;
|
|
int year;
|
|
u_int8_t csr;
|
|
|
|
/* enable read (stop time) */
|
|
csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
|
|
csr |= MK48TXX_CSR_READ;
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
|
|
|
|
ct.nsec = 0;
|
|
ct.sec = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_ISEC));
|
|
ct.min = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IMIN));
|
|
ct.hour = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IHOUR));
|
|
ct.day = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IDAY));
|
|
ct.dow = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IWDAY)) % 7;
|
|
ct.mon = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IMON));
|
|
year = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IYEAR));
|
|
|
|
year += mk->mk_year0;
|
|
if (year < POSIX_BASE_YEAR && mk48txx_auto_century_adjust != 0)
|
|
year += 100;
|
|
|
|
ct.year = year;
|
|
|
|
/* time wears on */
|
|
csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
|
|
csr &= ~MK48TXX_CSR_READ;
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
|
|
|
|
return (clock_ct_to_ts(&ct, ts));
|
|
}
|
|
|
|
/*
|
|
* Set the time-of-day clock based on the value of the `struct timespec' arg.
|
|
* Return 0 on success; an error number otherwise.
|
|
*/
|
|
int
|
|
mk48txx_settime(device_t dev, struct timespec *ts)
|
|
{
|
|
struct mk48txx_softc *mk = device_get_softc(dev);
|
|
bus_space_tag_t bt = mk->mk_bt;
|
|
bus_space_handle_t bh = mk->mk_bh;
|
|
bus_size_t clkoff = mk->mk_clkoffset;
|
|
struct clocktime ct;
|
|
u_int8_t csr;
|
|
int year;
|
|
|
|
/* Accuracy is only one second. */
|
|
if (ts->tv_nsec >= 500000000)
|
|
ts->tv_sec++;
|
|
ts->tv_nsec = 0;
|
|
clock_ts_to_ct(ts, &ct);
|
|
|
|
year = ct.year - mk->mk_year0;
|
|
if (year > 99 && mk48txx_auto_century_adjust != 0)
|
|
year -= 100;
|
|
|
|
/* enable write */
|
|
csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
|
|
csr |= MK48TXX_CSR_WRITE;
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
|
|
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_ISEC, TOBCD(ct.sec));
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_IMIN, TOBCD(ct.min));
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_IHOUR, TOBCD(ct.hour));
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_IWDAY, TOBCD(ct.dow));
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_IDAY, TOBCD(ct.day));
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_IMON, TOBCD(ct.mon));
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_IYEAR, TOBCD(year));
|
|
|
|
/* load them up */
|
|
csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
|
|
csr &= ~MK48TXX_CSR_WRITE;
|
|
bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
mk48txx_get_nvram_size(device_t dev, bus_size_t *vp)
|
|
{
|
|
struct mk48txx_softc *mk;
|
|
|
|
mk = device_get_softc(dev);
|
|
*vp = mk->mk_nvramsz;
|
|
return (0);
|
|
}
|