mk48txx.c revision 1.17.2.3
1 /* $NetBSD: mk48txx.c,v 1.17.2.3 2008/01/21 09:43:02 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 * 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 * Mostek MK48T02, MK48T08, MK48T59 time-of-day chip subroutines. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: mk48txx.c,v 1.17.2.3 2008/01/21 09:43:02 yamt Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/device.h> 48 #include <sys/errno.h> 49 50 #include <sys/bus.h> 51 #include <dev/clock_subr.h> 52 #include <dev/ic/mk48txxreg.h> 53 #include <dev/ic/mk48txxvar.h> 54 55 int mk48txx_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 56 int mk48txx_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *); 57 uint8_t mk48txx_def_nvrd(struct mk48txx_softc *, int); 58 void mk48txx_def_nvwr(struct mk48txx_softc *, int, uint8_t); 59 60 struct { 61 const char *name; 62 bus_size_t nvramsz; 63 bus_size_t clkoff; 64 int flags; 65 #define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */ 66 } mk48txx_models[] = { 67 { "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 }, 68 { "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 }, 69 { "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 }, 70 { "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS }, 71 }; 72 73 void 74 mk48txx_attach(struct mk48txx_softc *sc) 75 { 76 todr_chip_handle_t handle; 77 int i; 78 79 aprint_normal(": %s", sc->sc_model); 80 81 i = __arraycount(mk48txx_models); 82 while (--i >= 0) { 83 if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0) 84 break; 85 } 86 if (i < 0) 87 panic("%s: unsupported model", __func__); 88 89 sc->sc_nvramsz = mk48txx_models[i].nvramsz; 90 sc->sc_clkoffset = mk48txx_models[i].clkoff; 91 92 handle = &sc->sc_handle; 93 handle->cookie = sc; 94 handle->todr_gettime = NULL; 95 handle->todr_settime = NULL; 96 handle->todr_gettime_ymdhms = mk48txx_gettime_ymdhms; 97 handle->todr_settime_ymdhms = mk48txx_settime_ymdhms; 98 99 if (sc->sc_nvrd == NULL) 100 sc->sc_nvrd = mk48txx_def_nvrd; 101 if (sc->sc_nvwr == NULL) 102 sc->sc_nvwr = mk48txx_def_nvwr; 103 104 todr_attach(handle); 105 } 106 107 /* 108 * Get time-of-day and convert to a `struct timeval' 109 * Return 0 on success; an error number otherwise. 110 */ 111 int 112 mk48txx_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 113 { 114 struct mk48txx_softc *sc; 115 bus_size_t clkoff; 116 int year; 117 uint8_t csr; 118 119 sc = handle->cookie; 120 clkoff = sc->sc_clkoffset; 121 122 todr_wenable(handle, 1); 123 124 /* enable read (stop time) */ 125 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 126 csr |= MK48TXX_CSR_READ; 127 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 128 129 dt->dt_sec = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC)); 130 dt->dt_min = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN)); 131 dt->dt_hour = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR)); 132 dt->dt_day = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY)); 133 dt->dt_wday = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY)); 134 dt->dt_mon = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON)); 135 year = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR)); 136 137 year += sc->sc_year0; 138 if (year < POSIX_BASE_YEAR && 139 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) 140 year += 100; 141 142 dt->dt_year = year; 143 144 /* time wears on */ 145 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 146 csr &= ~MK48TXX_CSR_READ; 147 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 148 todr_wenable(handle, 0); 149 150 return 0; 151 } 152 153 /* 154 * Set the time-of-day clock based on the value of the `struct timeval' arg. 155 * Return 0 on success; an error number otherwise. 156 */ 157 int 158 mk48txx_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt) 159 { 160 struct mk48txx_softc *sc; 161 bus_size_t clkoff; 162 uint8_t csr; 163 int year; 164 165 sc = handle->cookie; 166 clkoff = sc->sc_clkoffset; 167 168 year = dt->dt_year - sc->sc_year0; 169 if (year > 99 && 170 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) 171 year -= 100; 172 173 todr_wenable(handle, 1); 174 /* enable write */ 175 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 176 csr |= MK48TXX_CSR_WRITE; 177 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 178 179 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, TOBCD(dt->dt_sec)); 180 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, TOBCD(dt->dt_min)); 181 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, TOBCD(dt->dt_hour)); 182 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, TOBCD(dt->dt_wday)); 183 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, TOBCD(dt->dt_day)); 184 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, TOBCD(dt->dt_mon)); 185 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, TOBCD(year)); 186 187 /* load them up */ 188 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 189 csr &= ~MK48TXX_CSR_WRITE; 190 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 191 todr_wenable(handle, 0); 192 return 0; 193 } 194 195 int 196 mk48txx_get_nvram_size(todr_chip_handle_t handle, bus_size_t *vp) 197 { 198 struct mk48txx_softc *sc; 199 200 sc = handle->cookie; 201 *vp = sc->sc_nvramsz; 202 return 0; 203 } 204 205 uint8_t 206 mk48txx_def_nvrd(struct mk48txx_softc *sc, int off) 207 { 208 209 return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off); 210 } 211 212 void 213 mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, uint8_t v) 214 { 215 216 bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v); 217 } 218
Indexes created Wed Oct 29 20:09:47 GMT 2025