mk48txx.c revision 1.29
1 /* $NetBSD: mk48txx.c,v 1.29 2025/09/07 21:45:16 thorpej 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 1.29 2025/09/07 21:45:16 thorpej 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 const 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 { "ds1553", DS1553_CLKSZ, DS1553_CLKOFF, MK48TXX_EXT_REGISTERS }, 65 }; 66 67 void 68 mk48txx_attach(struct mk48txx_softc *sc) 69 { 70 todr_chip_handle_t handle; 71 int i; 72 73 aprint_normal(": %s", sc->sc_model); 74 75 i = __arraycount(mk48txx_models); 76 while (--i >= 0) { 77 if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0) 78 break; 79 } 80 if (i < 0) 81 panic("%s: unsupported model", __func__); 82 83 sc->sc_nvramsz = mk48txx_models[i].nvramsz; 84 sc->sc_clkoffset = mk48txx_models[i].clkoff; 85 86 handle = &sc->sc_handle; 87 KASSERT(sc->sc_dev != NULL); 88 handle->todr_dev = sc->sc_dev; 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 = device_private(handle->todr_dev); 108 bus_size_t clkoff; 109 int year; 110 uint8_t csr; 111 112 clkoff = sc->sc_clkoffset; 113 114 /* enable read (stop time) */ 115 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 116 csr |= MK48TXX_CSR_READ; 117 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 118 119 dt->dt_sec = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC)); 120 dt->dt_min = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN)); 121 dt->dt_hour = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR)); 122 dt->dt_day = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY)); 123 dt->dt_wday = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY)); 124 dt->dt_mon = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON)); 125 year = bcdtobin((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR)); 126 127 if (sc->sc_flag & MK48TXX_HAVE_CENT_REG) { 128 year += 100*bcdtobin(csr & MK48TXX_CSR_CENT_MASK); 129 } else { 130 year += sc->sc_year0; 131 if (year < POSIX_BASE_YEAR && 132 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) 133 year += 100; 134 } 135 136 dt->dt_year = year; 137 138 /* time wears on */ 139 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 140 csr &= ~MK48TXX_CSR_READ; 141 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 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 = device_private(handle->todr_dev); 154 bus_size_t clkoff; 155 uint8_t csr; 156 int year; 157 int cent; 158 159 clkoff = sc->sc_clkoffset; 160 161 if ((sc->sc_flag & MK48TXX_HAVE_CENT_REG) == 0) { 162 cent = 0; 163 year = dt->dt_year - sc->sc_year0; 164 if (year > 99 && 165 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) 166 year -= 100; 167 } else { 168 cent = dt->dt_year / 100; 169 year = dt->dt_year % 100; 170 } 171 172 /* enable write */ 173 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 174 csr |= MK48TXX_CSR_WRITE; 175 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 176 177 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, bintobcd(dt->dt_sec)); 178 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, bintobcd(dt->dt_min)); 179 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, bintobcd(dt->dt_hour)); 180 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, bintobcd(dt->dt_wday)); 181 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, bintobcd(dt->dt_day)); 182 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, bintobcd(dt->dt_mon)); 183 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, bintobcd(year)); 184 185 /* 186 * If we have a century register and the century has changed 187 * update it. 188 */ 189 if ((sc->sc_flag & MK48TXX_HAVE_CENT_REG) 190 && (csr & MK48TXX_CSR_CENT_MASK) != bintobcd(cent)) { 191 csr &= ~MK48TXX_CSR_CENT_MASK; 192 csr |= MK48TXX_CSR_CENT_MASK & bintobcd(cent); 193 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 194 } 195 196 /* load them up */ 197 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 198 csr &= ~MK48TXX_CSR_WRITE; 199 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 200 201 return 0; 202 } 203 204 int 205 mk48txx_get_nvram_size(todr_chip_handle_t handle, bus_size_t *vp) 206 { 207 struct mk48txx_softc *sc = device_private(handle->todr_dev); 208 209 *vp = sc->sc_nvramsz; 210 return 0; 211 } 212 213 uint8_t 214 mk48txx_def_nvrd(struct mk48txx_softc *sc, int off) 215 { 216 217 return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off); 218 } 219 220 void 221 mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, uint8_t v) 222 { 223 224 bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v); 225 } 226
Indexes created Mon Sep 29 15:09:53 GMT 2025