213 lines
6.6 KiB
C
213 lines
6.6 KiB
C
/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: mk48txx.c,v 1.7 2001/04/08 17:05:10 tsutsui Exp $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines.
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*/
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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/malloc.h>
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#include <machine/bus.h>
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#include <dev/mk48txx/mk48txxreg.h>
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#include "clock_if.h"
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struct mk48txx_softc {
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bus_space_tag_t mk_bt; /* bus tag & handle */
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bus_space_handle_t mk_bh; /* */
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bus_size_t mk_nvramsz; /* Size of NVRAM on the chip */
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bus_size_t mk_clkoffset; /* Offset in NVRAM to clock bits */
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u_int mk_year0; /* What year is represented on the system
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by the chip's year counter at 0 */
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};
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int mk48txx_auto_century_adjust = 1;
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struct {
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const char *name;
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bus_size_t nvramsz;
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bus_size_t clkoff;
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int flags;
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#define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */
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} mk48txx_models[] = {
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{ "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
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{ "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
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{ "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
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};
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int
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mk48txx_attach(device_t dev, bus_space_tag_t bt, bus_space_handle_t bh,
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const char *model, int year0)
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{
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struct mk48txx_softc *sc;
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bus_size_t clkoff = 0, nvramsz = 0;
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int i;
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device_printf(dev, "model %s", model);
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i = sizeof(mk48txx_models) / sizeof(mk48txx_models[0]);
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while (--i >= 0) {
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if (strcmp(model, mk48txx_models[i].name) == 0) {
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nvramsz = mk48txx_models[i].nvramsz;
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clkoff = mk48txx_models[i].clkoff;
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break;
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}
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}
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if (i < 0) {
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device_printf(dev, " (unsupported)\n");
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return (ENXIO);
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}
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printf("\n");
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sc = malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT);
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sc->mk_bt = bt;
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sc->mk_bh = bh;
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sc->mk_nvramsz = nvramsz;
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sc->mk_clkoffset = clkoff;
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sc->mk_year0 = year0;
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device_set_softc(dev, sc);
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clock_register(dev, 1000000); /* 1 second resolution. */
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return (0);
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}
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/*
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* Get time-of-day and convert to a `struct timespec'
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* Return 0 on success; an error number otherwise.
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*/
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int
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mk48txx_gettime(device_t dev, struct timespec *ts)
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{
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struct mk48txx_softc *mk = device_get_softc(dev);
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bus_space_tag_t bt = mk->mk_bt;
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bus_space_handle_t bh = mk->mk_bh;
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bus_size_t clkoff = mk->mk_clkoffset;
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struct clocktime ct;
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int year;
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u_int8_t csr;
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/* enable read (stop time) */
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csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_READ;
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
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ct.nsec = 0;
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ct.sec = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_ISEC));
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ct.min = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IMIN));
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ct.hour = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IHOUR));
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ct.day = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IDAY));
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ct.dow = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IWDAY)) % 7;
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ct.mon = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IMON));
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year = FROMBCD(bus_space_read_1(bt, bh, clkoff + MK48TXX_IYEAR));
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year += mk->mk_year0;
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if (year < POSIX_BASE_YEAR && mk48txx_auto_century_adjust != 0)
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year += 100;
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ct.year = year;
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/* time wears on */
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csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_READ;
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
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return (clock_ct_to_ts(&ct, ts));
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}
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/*
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* Set the time-of-day clock based on the value of the `struct timespec' arg.
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* Return 0 on success; an error number otherwise.
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*/
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int
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mk48txx_settime(device_t dev, struct timespec *ts)
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{
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struct mk48txx_softc *mk = device_get_softc(dev);
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bus_space_tag_t bt = mk->mk_bt;
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bus_space_handle_t bh = mk->mk_bh;
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bus_size_t clkoff = mk->mk_clkoffset;
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struct clocktime ct;
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u_int8_t csr;
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int year;
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/* Accuracy is only one second. */
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if (ts->tv_nsec >= 500000000)
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ts->tv_sec++;
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ts->tv_nsec = 0;
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clock_ts_to_ct(ts, &ct);
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year = ct.year - mk->mk_year0;
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if (year > 99 && mk48txx_auto_century_adjust != 0)
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year -= 100;
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/* enable write */
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csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_WRITE;
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ISEC, TOBCD(ct.sec));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IMIN, TOBCD(ct.min));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IHOUR, TOBCD(ct.hour));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IWDAY, TOBCD(ct.dow));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IDAY, TOBCD(ct.day));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IMON, TOBCD(ct.mon));
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bus_space_write_1(bt, bh, clkoff + MK48TXX_IYEAR, TOBCD(year));
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/* load them up */
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csr = bus_space_read_1(bt, bh, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_WRITE;
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bus_space_write_1(bt, bh, clkoff + MK48TXX_ICSR, csr);
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return (0);
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}
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int
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mk48txx_get_nvram_size(device_t dev, bus_size_t *vp)
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{
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struct mk48txx_softc *mk;
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mk = device_get_softc(dev);
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*vp = mk->mk_nvramsz;
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return (0);
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}
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