intersil7170.c revision 1.9.8.1
1 /* $NetBSD: intersil7170.c,v 1.9.8.1 2008/01/10 23:44:15 bouyer Exp $ */ 2 /*- 3 * Copyright (c) 2000 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Paul Kranenburg. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Intersil 7170 time-of-day chip subroutines. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: intersil7170.c,v 1.9.8.1 2008/01/10 23:44:15 bouyer Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/malloc.h> 47 #include <sys/systm.h> 48 #include <sys/device.h> 49 #include <sys/errno.h> 50 51 #include <sys/bus.h> 52 #include <dev/clock_subr.h> 53 #include <dev/ic/intersil7170reg.h> 54 #include <dev/ic/intersil7170var.h> 55 56 int intersil7170_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 57 int intersil7170_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 58 59 void 60 intersil7170_attach(struct intersil7170_softc *sc) 61 { 62 todr_chip_handle_t handle; 63 64 aprint_normal(": intersil7170"); 65 66 handle = &sc->sc_handle; 67 68 handle->cookie = sc; 69 handle->todr_gettime = NULL; 70 handle->todr_settime = NULL; 71 handle->todr_gettime_ymdhms = intersil7170_gettime_ymdhms; 72 handle->todr_settime_ymdhms = intersil7170_settime_ymdhms; 73 handle->todr_setwen = NULL; 74 75 todr_attach(handle); 76 } 77 78 /* 79 * Set up the system's time, given a `reasonable' time value. 80 */ 81 int 82 intersil7170_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 83 { 84 struct intersil7170_softc *sc = handle->cookie; 85 bus_space_tag_t bt = sc->sc_bst; 86 bus_space_handle_t bh = sc->sc_bsh; 87 uint8_t cmd; 88 int year; 89 int s; 90 91 /* No interrupts while we're fiddling with the chip */ 92 s = splhigh(); 93 94 /* Enable read (stop time) */ 95 cmd = INTERSIL_COMMAND(INTERSIL_CMD_STOP, INTERSIL_CMD_IENABLE); 96 bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); 97 98 /* The order of reading out the clock elements is important */ 99 (void)bus_space_read_1(bt, bh, INTERSIL_ICSEC); /* not used */ 100 dt->dt_hour = bus_space_read_1(bt, bh, INTERSIL_IHOUR); 101 dt->dt_min = bus_space_read_1(bt, bh, INTERSIL_IMIN); 102 dt->dt_sec = bus_space_read_1(bt, bh, INTERSIL_ISEC); 103 dt->dt_mon = bus_space_read_1(bt, bh, INTERSIL_IMON); 104 dt->dt_day = bus_space_read_1(bt, bh, INTERSIL_IDAY); 105 year = bus_space_read_1(bt, bh, INTERSIL_IYEAR); 106 dt->dt_wday = bus_space_read_1(bt, bh, INTERSIL_IDOW); 107 108 /* Done writing (time wears on) */ 109 cmd = INTERSIL_COMMAND(INTERSIL_CMD_RUN, INTERSIL_CMD_IENABLE); 110 bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); 111 splx(s); 112 113 year += sc->sc_year0; 114 if (year < POSIX_BASE_YEAR && 115 (sc->sc_flag & INTERSIL7170_NO_CENT_ADJUST) == 0) 116 year += 100; 117 118 dt->dt_year = year; 119 120 return 0; 121 } 122 123 /* 124 * Reset the clock based on the current time. 125 */ 126 int 127 intersil7170_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 128 { 129 struct intersil7170_softc *sc = handle->cookie; 130 bus_space_tag_t bt = sc->sc_bst; 131 bus_space_handle_t bh = sc->sc_bsh; 132 uint8_t cmd; 133 int year; 134 int s; 135 136 year = dt->dt_year - sc->sc_year0; 137 if (year > 99 && (sc->sc_flag & INTERSIL7170_NO_CENT_ADJUST) == 0) 138 year -= 100; 139 140 /* No interrupts while we're fiddling with the chip */ 141 s = splhigh(); 142 143 /* Enable write (stop time) */ 144 cmd = INTERSIL_COMMAND(INTERSIL_CMD_STOP, INTERSIL_CMD_IENABLE); 145 bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); 146 147 /* The order of reading writing the clock elements is important */ 148 bus_space_write_1(bt, bh, INTERSIL_ICSEC, 0); 149 bus_space_write_1(bt, bh, INTERSIL_IHOUR, dt->dt_hour); 150 bus_space_write_1(bt, bh, INTERSIL_IMIN, dt->dt_min); 151 bus_space_write_1(bt, bh, INTERSIL_ISEC, dt->dt_sec); 152 bus_space_write_1(bt, bh, INTERSIL_IMON, dt->dt_mon); 153 bus_space_write_1(bt, bh, INTERSIL_IDAY, dt->dt_day); 154 bus_space_write_1(bt, bh, INTERSIL_IYEAR, year); 155 bus_space_write_1(bt, bh, INTERSIL_IDOW, dt->dt_wday); 156 157 /* Done writing (time wears on) */ 158 cmd = INTERSIL_COMMAND(INTERSIL_CMD_RUN, INTERSIL_CMD_IENABLE); 159 bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); 160 splx(s); 161 162 return 0; 163 } 164
Indexes created Wed Oct 22 13:09:56 GMT 2025