mk48txx.c revision 1.24.8.1
1 /* $NetBSD: mk48txx.c,v 1.24.8.1 2008/05/18 12:33:44 yamt 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: mk48txx.c,v 1.24.8.1 2008/05/18 12:33:44 yamt Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 #include <sys/errno.h> 42 43 #include <sys/bus.h> 44 #include <dev/clock_subr.h> 45 #include <dev/ic/mk48txxreg.h> 46 #include <dev/ic/mk48txxvar.h> 47 48 int mk48txx_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 49 int mk48txx_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 50 uint8_t mk48txx_def_nvrd(struct mk48txx_softc *, int); 51 void mk48txx_def_nvwr(struct mk48txx_softc *, int, uint8_t); 52 53 struct { 54 const char *name; 55 bus_size_t nvramsz; 56 bus_size_t clkoff; 57 int flags; 58 #define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */ 59 } mk48txx_models[] = { 60 { "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 }, 61 { "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 }, 62 { "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 }, 63 { "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS }, 64 }; 65 66 void 67 mk48txx_attach(struct mk48txx_softc *sc) 68 { 69 todr_chip_handle_t handle; 70 int i; 71 72 aprint_normal(": %s", sc->sc_model); 73 74 i = __arraycount(mk48txx_models); 75 while (--i >= 0) { 76 if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0) 77 break; 78 } 79 if (i < 0) 80 panic("%s: unsupported model", __func__); 81 82 sc->sc_nvramsz = mk48txx_models[i].nvramsz; 83 sc->sc_clkoffset = mk48txx_models[i].clkoff; 84 85 handle = &sc->sc_handle; 86 handle->cookie = sc; 87 handle->todr_gettime = NULL; 88 handle->todr_settime = NULL; 89 handle->todr_gettime_ymdhms = mk48txx_gettime_ymdhms; 90 handle->todr_settime_ymdhms = mk48txx_settime_ymdhms; 91 92 if (sc->sc_nvrd == NULL) 93 sc->sc_nvrd = mk48txx_def_nvrd; 94 if (sc->sc_nvwr == NULL) 95 sc->sc_nvwr = mk48txx_def_nvwr; 96 97 todr_attach(handle); 98 } 99 100 /* 101 * Get time-of-day and convert to a `struct timeval' 102 * Return 0 on success; an error number otherwise. 103 */ 104 int 105 mk48txx_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 106 { 107 struct mk48txx_softc *sc; 108 bus_size_t clkoff; 109 int year; 110 uint8_t csr; 111 112 sc = handle->cookie; 113 clkoff = sc->sc_clkoffset; 114 115 todr_wenable(handle, 1); 116 117 /* enable read (stop time) */ 118 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 119 csr |= MK48TXX_CSR_READ; 120 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 121 122 dt->dt_sec = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC)); 123 dt->dt_min = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN)); 124 dt->dt_hour = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR)); 125 dt->dt_day = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY)); 126 dt->dt_wday = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY)); 127 dt->dt_mon = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON)); 128 year = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR)); 129 130 year += sc->sc_year0; 131 if (year < POSIX_BASE_YEAR && 132 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) 133 year += 100; 134 135 dt->dt_year = year; 136 137 /* time wears on */ 138 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 139 csr &= ~MK48TXX_CSR_READ; 140 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 141 todr_wenable(handle, 0); 142 143 return 0; 144 } 145 146 /* 147 * Set the time-of-day clock based on the value of the `struct timeval' arg. 148 * Return 0 on success; an error number otherwise. 149 */ 150 int 151 mk48txx_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 152 { 153 struct mk48txx_softc *sc; 154 bus_size_t clkoff; 155 uint8_t csr; 156 int year; 157 158 sc = handle->cookie; 159 clkoff = sc->sc_clkoffset; 160 161 year = dt->dt_year - sc->sc_year0; 162 if (year > 99 && 163 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) 164 year -= 100; 165 166 todr_wenable(handle, 1); 167 /* enable write */ 168 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 169 csr |= MK48TXX_CSR_WRITE; 170 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 171 172 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, TOBCD(dt->dt_sec)); 173 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, TOBCD(dt->dt_min)); 174 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, TOBCD(dt->dt_hour)); 175 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, TOBCD(dt->dt_wday)); 176 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, TOBCD(dt->dt_day)); 177 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, TOBCD(dt->dt_mon)); 178 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, TOBCD(year)); 179 180 /* load them up */ 181 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 182 csr &= ~MK48TXX_CSR_WRITE; 183 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 184 todr_wenable(handle, 0); 185 return 0; 186 } 187 188 int 189 mk48txx_get_nvram_size(todr_chip_handle_t handle, bus_size_t *vp) 190 { 191 struct mk48txx_softc *sc; 192 193 sc = handle->cookie; 194 *vp = sc->sc_nvramsz; 195 return 0; 196 } 197 198 uint8_t 199 mk48txx_def_nvrd(struct mk48txx_softc *sc, int off) 200 { 201 202 return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off); 203 } 204 205 void 206 mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, uint8_t v) 207 { 208 209 bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v); 210 } 211
Indexes created Wed Oct 29 12:09:47 GMT 2025