intersil7170.c revision 1.7.4.1
1 /* $NetBSD: intersil7170.c,v 1.7.4.1 2006/10/06 13:27:04 tsutsui 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 1.7.4.1 2006/10/06 13:27:04 tsutsui 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 <machine/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 printf(": 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 76 /* 77 * Set up the system's time, given a `reasonable' time value. 78 */ 79 int 80 intersil7170_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 81 { 82 struct intersil7170_softc *sc = handle->cookie; 83 bus_space_tag_t bt = sc->sc_bst; 84 bus_space_handle_t bh = sc->sc_bsh; 85 uint8_t cmd; 86 int year; 87 int s; 88 89 /* No interrupts while we're fiddling with the chip */ 90 s = splhigh(); 91 92 /* Enable read (stop time) */ 93 cmd = INTERSIL_COMMAND(INTERSIL_CMD_STOP, INTERSIL_CMD_IENABLE); 94 bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); 95 96 /* The order of reading out the clock elements is important */ 97 (void)bus_space_read_1(bt, bh, INTERSIL_ICSEC); /* not used */ 98 dt->dt_hour = bus_space_read_1(bt, bh, INTERSIL_IHOUR); 99 dt->dt_min = bus_space_read_1(bt, bh, INTERSIL_IMIN); 100 dt->dt_sec = bus_space_read_1(bt, bh, INTERSIL_ISEC); 101 dt->dt_mon = bus_space_read_1(bt, bh, INTERSIL_IMON); 102 dt->dt_day = bus_space_read_1(bt, bh, INTERSIL_IDAY); 103 year = bus_space_read_1(bt, bh, INTERSIL_IYEAR); 104 dt->dt_wday = bus_space_read_1(bt, bh, INTERSIL_IDOW); 105 106 /* Done writing (time wears on) */ 107 cmd = INTERSIL_COMMAND(INTERSIL_CMD_RUN, INTERSIL_CMD_IENABLE); 108 bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); 109 splx(s); 110 111 year += sc->sc_year0; 112 if (year < POSIX_BASE_YEAR && 113 (sc->sc_flag & INTERSIL7170_NO_CENT_ADJUST) == 0) 114 year += 100; 115 116 dt->dt_year = year; 117 118 return 0; 119 } 120 121 /* 122 * Reset the clock based on the current time. 123 */ 124 int 125 intersil7170_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 126 { 127 struct intersil7170_softc *sc = handle->cookie; 128 bus_space_tag_t bt = sc->sc_bst; 129 bus_space_handle_t bh = sc->sc_bsh; 130 uint8_t cmd; 131 int year; 132 int s; 133 134 year = dt->dt_year - sc->sc_year0; 135 if (year > 99 && (sc->sc_flag & INTERSIL7170_NO_CENT_ADJUST) == 0) 136 year -= 100; 137 138 /* No interrupts while we're fiddling with the chip */ 139 s = splhigh(); 140 141 /* Enable write (stop time) */ 142 cmd = INTERSIL_COMMAND(INTERSIL_CMD_STOP, INTERSIL_CMD_IENABLE); 143 bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); 144 145 /* The order of reading writing the clock elements is important */ 146 bus_space_write_1(bt, bh, INTERSIL_ICSEC, 0); 147 bus_space_write_1(bt, bh, INTERSIL_IHOUR, dt->dt_hour); 148 bus_space_write_1(bt, bh, INTERSIL_IMIN, dt->dt_min); 149 bus_space_write_1(bt, bh, INTERSIL_ISEC, dt->dt_sec); 150 bus_space_write_1(bt, bh, INTERSIL_IMON, dt->dt_mon); 151 bus_space_write_1(bt, bh, INTERSIL_IDAY, dt->dt_day); 152 bus_space_write_1(bt, bh, INTERSIL_IYEAR, year); 153 bus_space_write_1(bt, bh, INTERSIL_IDOW, dt->dt_wday); 154 155 /* Done writing (time wears on) */ 156 cmd = INTERSIL_COMMAND(INTERSIL_CMD_RUN, INTERSIL_CMD_IENABLE); 157 bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd); 158 splx(s); 159 160 return 0; 161 } 162
Indexes created Wed Oct 22 13:09:56 GMT 2025