mk48txx.c revision 1.19
1 /* $NetBSD: mk48txx.c,v 1.19 2006/09/04 23:45:30 gdamore 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 1.19 2006/09/04 23:45:30 gdamore 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 <machine/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(todr_chip_handle_t, volatile struct timeval *); 56 int mk48txx_settime(todr_chip_handle_t, volatile struct timeval *); 57 u_int8_t mk48txx_def_nvrd(struct mk48txx_softc *, int); 58 void mk48txx_def_nvwr(struct mk48txx_softc *, int, u_int8_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(sc) 75 struct mk48txx_softc *sc; 76 { 77 todr_chip_handle_t handle; 78 int i; 79 80 printf(": %s", sc->sc_model); 81 82 i = sizeof(mk48txx_models) / sizeof(mk48txx_models[0]); 83 while (--i >= 0) { 84 if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0) 85 break; 86 } 87 if (i < 0) 88 panic("mk48txx_attach: unsupported model"); 89 90 sc->sc_nvramsz = mk48txx_models[i].nvramsz; 91 sc->sc_clkoffset = mk48txx_models[i].clkoff; 92 93 handle = &sc->sc_handle; 94 handle->cookie = sc; 95 handle->todr_gettime = mk48txx_gettime; 96 handle->todr_settime = mk48txx_settime; 97 handle->todr_setwen = NULL; 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 } 104 105 /* 106 * Get time-of-day and convert to a `struct timeval' 107 * Return 0 on success; an error number otherwise. 108 */ 109 int 110 mk48txx_gettime(handle, tv) 111 todr_chip_handle_t handle; 112 volatile struct timeval *tv; 113 { 114 struct mk48txx_softc *sc; 115 bus_size_t clkoff; 116 struct clock_ymdhms dt; 117 int year; 118 u_int8_t csr; 119 120 sc = handle->cookie; 121 clkoff = sc->sc_clkoffset; 122 123 todr_wenable(handle, 1); 124 125 /* enable read (stop time) */ 126 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 127 csr |= MK48TXX_CSR_READ; 128 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 129 130 dt.dt_sec = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_ISEC)); 131 dt.dt_min = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMIN)); 132 dt.dt_hour = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IHOUR)); 133 dt.dt_day = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IDAY)); 134 dt.dt_wday = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IWDAY)); 135 dt.dt_mon = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IMON)); 136 year = FROMBCD((*sc->sc_nvrd)(sc, clkoff + MK48TXX_IYEAR)); 137 138 year += sc->sc_year0; 139 if (year < POSIX_BASE_YEAR && 140 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) 141 year += 100; 142 143 dt.dt_year = year; 144 145 /* time wears on */ 146 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 147 csr &= ~MK48TXX_CSR_READ; 148 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 149 todr_wenable(handle, 0); 150 151 /* simple sanity checks */ 152 if (dt.dt_mon > 12 || dt.dt_day > 31 || 153 dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60) 154 return EIO; 155 156 tv->tv_sec = clock_ymdhms_to_secs(&dt); 157 if (tv->tv_sec == -1) return ERANGE; 158 tv->tv_usec = 0; 159 return 0; 160 } 161 162 /* 163 * Set the time-of-day clock based on the value of the `struct timeval' arg. 164 * Return 0 on success; an error number otherwise. 165 */ 166 int 167 mk48txx_settime(handle, tv) 168 todr_chip_handle_t handle; 169 volatile struct timeval *tv; 170 { 171 struct mk48txx_softc *sc; 172 bus_size_t clkoff; 173 struct clock_ymdhms dt; 174 u_int8_t csr; 175 int year; 176 long sec; 177 178 sc = handle->cookie; 179 clkoff = sc->sc_clkoffset; 180 181 /* Note: we ignore `tv_usec' */ 182 sec = tv->tv_sec + ((tv->tv_usec < 500000) ? 0 : 1); 183 clock_secs_to_ymdhms(sec, &dt); 184 185 year = dt.dt_year - sc->sc_year0; 186 if (year > 99 && 187 (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) == 0) 188 year -= 100; 189 190 todr_wenable(handle, 1); 191 /* enable write */ 192 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 193 csr |= MK48TXX_CSR_WRITE; 194 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 195 196 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ISEC, TOBCD(dt.dt_sec)); 197 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMIN, TOBCD(dt.dt_min)); 198 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IHOUR, TOBCD(dt.dt_hour)); 199 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IWDAY, TOBCD(dt.dt_wday)); 200 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IDAY, TOBCD(dt.dt_day)); 201 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IMON, TOBCD(dt.dt_mon)); 202 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_IYEAR, TOBCD(year)); 203 204 /* load them up */ 205 csr = (*sc->sc_nvrd)(sc, clkoff + MK48TXX_ICSR); 206 csr &= ~MK48TXX_CSR_WRITE; 207 (*sc->sc_nvwr)(sc, clkoff + MK48TXX_ICSR, csr); 208 todr_wenable(handle, 0); 209 return 0; 210 } 211 212 int 213 mk48txx_get_nvram_size(handle, vp) 214 todr_chip_handle_t handle; 215 bus_size_t *vp; 216 { 217 struct mk48txx_softc *sc; 218 219 sc = handle->cookie; 220 *vp = sc->sc_nvramsz; 221 return 0; 222 } 223 224 u_int8_t 225 mk48txx_def_nvrd(struct mk48txx_softc *sc, int off) 226 { 227 228 return bus_space_read_1(sc->sc_bst, sc->sc_bsh, off); 229 } 230 231 void 232 mk48txx_def_nvwr(struct mk48txx_softc *sc, int off, u_int8_t v) 233 { 234 235 bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v); 236 } 237
Indexes created Thu Oct 30 03:10:01 GMT 2025