1 /* $NetBSD: mkclock.c,v 1.12 2014/11/20 16:34:25 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wayne Knowles 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: mkclock.c,v 1.12 2014/11/20 16:34:25 christos Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/device.h> 38 #include <sys/systm.h> 39 40 #include <dev/clock_subr.h> 41 42 #include <machine/cpu.h> 43 #include <machine/mainboard.h> 44 #include <machine/autoconf.h> 45 #include <machine/sysconf.h> 46 #include <machine/bus.h> 47 48 #include <mipsco/obio/clockreg.h> 49 50 struct mkclock_softc { 51 bus_space_tag_t sc_bst; 52 bus_space_handle_t sc_bsh; 53 struct todr_chip_handle sc_todr; 54 }; 55 56 static int mkclock_match (device_t, cfdata_t, void *); 57 static void mkclock_attach (device_t, device_t, void *); 58 59 CFATTACH_DECL_NEW(mkclock, sizeof(struct mkclock_softc), 60 mkclock_match, mkclock_attach, NULL, NULL); 61 62 int mkclock_read (todr_chip_handle_t, struct clock_ymdhms *); 63 int mkclock_write (todr_chip_handle_t, struct clock_ymdhms *); 64 65 static int mk_read (struct mkclock_softc *, int); 66 static void mk_write (struct mkclock_softc *, int, int); 67 68 int 69 mkclock_match(device_t parent, cfdata_t cf, void *aux) 70 { 71 return 1; 72 } 73 74 void 75 mkclock_attach(device_t parent, device_t self, void *aux) 76 { 77 struct mkclock_softc *sc = device_private(self); 78 struct confargs *ca = aux; 79 80 sc->sc_bst = ca->ca_bustag; 81 if (bus_space_map(ca->ca_bustag, ca->ca_addr, 82 0x10000, 83 BUS_SPACE_MAP_LINEAR, 84 &sc->sc_bsh) != 0) { 85 printf(": cannot map registers\n"); 86 return; 87 } 88 89 sc->sc_todr.todr_settime_ymdhms = mkclock_write; 90 sc->sc_todr.todr_gettime_ymdhms = mkclock_read; 91 sc->sc_todr.cookie = sc; 92 todr_attach(&sc->sc_todr); 93 94 printf("\n"); 95 } 96 97 static int 98 mk_read(struct mkclock_softc *sc, int reg) 99 { 100 u_int8_t val; 101 102 val = bus_space_read_1(sc->sc_bst, sc->sc_bsh, DATA_PORT + reg*4); 103 return bcdtobin(val); 104 } 105 106 static void 107 mk_write(struct mkclock_softc *sc, int reg, int val) 108 { 109 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 110 DATA_PORT + reg*4, bintobcd(val)); 111 } 112 113 int 114 mkclock_read(todr_chip_handle_t tch, struct clock_ymdhms *dt) 115 { 116 struct mkclock_softc *sc = tch->cookie; 117 int s = splclock(); 118 119 bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_PORT, READ_CLOCK); 120 dt->dt_sec = mk_read(sc, 0); 121 dt->dt_min = mk_read(sc, 1); 122 dt->dt_hour = mk_read(sc, 2); 123 dt->dt_wday = mk_read(sc, 3); 124 dt->dt_day = mk_read(sc, 4); 125 dt->dt_mon = mk_read(sc, 5); 126 dt->dt_year = mk_read(sc, 6); 127 bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_PORT, 0); 128 splx(s); 129 130 dt->dt_year = dt->dt_year + (dt->dt_year >= 70 ? 1900 : 2000); 131 return 0; 132 } 133 134 int 135 mkclock_write(todr_chip_handle_t tch, struct clock_ymdhms *dt) 136 { 137 struct mkclock_softc *sc = tch->cookie; 138 int year, s; 139 140 year = dt->dt_year % 100; 141 142 s = splclock(); 143 bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_PORT, SET_CLOCK); 144 mk_write(sc, 0, dt->dt_sec); 145 mk_write(sc, 1, dt->dt_min); 146 mk_write(sc, 2, dt->dt_hour); 147 /* week day not set */ 148 mk_write(sc, 4, dt->dt_day); 149 mk_write(sc, 5, dt->dt_mon); 150 mk_write(sc, 6, year); 151 bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_PORT, 0); 152 splx(s); 153 return 0; 154 } 155