/* $NetBSD: intersil7170.c,v 1.3 2004/07/05 09:24:31 pk Exp $ */ /*- * 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. */ /* * Intersil 7170 time-of-day chip subroutines. */ #include __KERNEL_RCSID(0, "$NetBSD: intersil7170.c,v 1.3 2004/07/05 09:24:31 pk Exp $"); #include #include #include #include #include #include #include #define intersil_command(run, interrupt) \ (run | interrupt | INTERSIL_CMD_FREQ_32K | INTERSIL_CMD_24HR_MODE | \ INTERSIL_CMD_NORMAL_MODE) struct intersil7170_softc { bus_space_tag_t sil_bt; bus_space_handle_t sil_bh; int sil_year0; }; int intersil7170_gettime(todr_chip_handle_t, struct timeval *); int intersil7170_settime(todr_chip_handle_t, struct timeval *); int intersil7170_getcal(todr_chip_handle_t, int *); int intersil7170_setcal(todr_chip_handle_t, int); int intersil7170_auto_century_adjust = 1; todr_chip_handle_t intersil7170_attach(bt, bh, year0) bus_space_tag_t bt; bus_space_handle_t bh; int year0; { todr_chip_handle_t handle; struct intersil7170_softc *sil; int sz; printf(": intersil7170"); sz = ALIGN(sizeof(struct todr_chip_handle)) + sizeof(struct intersil7170); handle = malloc(sz, M_DEVBUF, M_NOWAIT); sil = (struct intersil7170_softc *)((u_long)handle + ALIGN(sizeof(struct todr_chip_handle))); handle->cookie = sil; handle->todr_gettime = intersil7170_gettime; handle->todr_settime = intersil7170_settime; handle->todr_getcal = intersil7170_getcal; handle->todr_setcal = intersil7170_setcal; sil->sil_bt = bt; sil->sil_bh = bh; sil->sil_year0 = year0; return (handle); } /* * Set up the system's time, given a `reasonable' time value. */ int intersil7170_gettime(handle, tv) todr_chip_handle_t handle; struct timeval *tv; { struct intersil7170_softc *sil = handle->cookie; bus_space_tag_t bt = sil->sil_bt; bus_space_handle_t bh = sil->sil_bh; struct clock_ymdhms dt; u_int8_t cmd; int year; int s; /* No interrupts while we're fiddling with the chip */ s = splhigh(); /* Enable read (stop time) */ cmd = intersil_command(INTERSIL_CMD_STOP, INTERSIL_CMD_IENABLE); bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); /* The order of reading out the clock elements is important */ bus_space_read_1(bt, bh, INTERSIL_ICSEC); /* not used */ dt.dt_hour = bus_space_read_1(bt, bh, INTERSIL_IHOUR); dt.dt_min = bus_space_read_1(bt, bh, INTERSIL_IMIN); dt.dt_sec = bus_space_read_1(bt, bh, INTERSIL_ISEC); dt.dt_mon = bus_space_read_1(bt, bh, INTERSIL_IMON); dt.dt_day = bus_space_read_1(bt, bh, INTERSIL_IDAY); year = bus_space_read_1(bt, bh, INTERSIL_IYEAR); dt.dt_wday = bus_space_read_1(bt, bh, INTERSIL_IDOW); /* Done writing (time wears on) */ cmd = intersil_command(INTERSIL_CMD_RUN, INTERSIL_CMD_IENABLE); bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); splx(s); year += sil->sil_year0; if (year < 1970 && intersil7170_auto_century_adjust != 0) year += 100; dt.dt_year = year; tv->tv_sec = clock_ymdhms_to_secs(&dt); tv->tv_usec = 0; return (0); } /* * Reset the clock based on the current time. */ int intersil7170_settime(handle, tv) todr_chip_handle_t handle; struct timeval *tv; { struct intersil7170_softc *sil = handle->cookie; bus_space_tag_t bt = sil->sil_bt; bus_space_handle_t bh = sil->sil_bh; struct clock_ymdhms dt; u_int8_t cmd; int year; long sec; int s; sec = tv->tv_sec + ((tv->tv_usec < 500000) ? 0 : 1); clock_secs_to_ymdhms(sec, &dt); year = dt.dt_year - sil->sil_year0; if (year > 99 && intersil7170_auto_century_adjust != 0) year -= 100; /* No interrupts while we're fiddling with the chip */ s = splhigh(); /* Enable write (stop time) */ cmd = intersil_command(INTERSIL_CMD_STOP, INTERSIL_CMD_IENABLE); bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); /* The order of reading writing the clock elements is important */ bus_space_write_1(bt, bh, INTERSIL_ICSEC, 0); bus_space_write_1(bt, bh, INTERSIL_IHOUR, dt.dt_hour); bus_space_write_1(bt, bh, INTERSIL_IMIN, dt.dt_min); bus_space_write_1(bt, bh, INTERSIL_ISEC, dt.dt_sec); bus_space_write_1(bt, bh, INTERSIL_IMON, dt.dt_mon); bus_space_write_1(bt, bh, INTERSIL_IDAY, dt.dt_day); bus_space_write_1(bt, bh, INTERSIL_IYEAR, year); bus_space_write_1(bt, bh, INTERSIL_IDOW, dt.dt_wday); /* Done writing (time wears on) */ cmd = intersil_command(INTERSIL_CMD_RUN, INTERSIL_CMD_IENABLE); bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); splx(s); return (0); } int intersil7170_getcal(handle, vp) todr_chip_handle_t handle; int *vp; { return (EOPNOTSUPP); } int intersil7170_setcal(handle, v) todr_chip_handle_t handle; int v; { return (EOPNOTSUPP); }