/*- * 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 #include #include #include #include #include #include #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); }