mk48txx.c revision 1.11
1 /* $NetBSD: mk48txx.c,v 1.11 2003/10/30 21:19:02 matt 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 1.11 2003/10/30 21:19:02 matt Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/malloc.h> 47 #include <sys/systm.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 54 55 struct mk48txx { 56 bus_space_tag_t mk_bt; /* bus tag & handle */ 57 bus_space_handle_t mk_bh; /* */ 58 bus_size_t mk_nvramsz; /* Size of NVRAM on the chip */ 59 bus_size_t mk_clkoffset; /* Offset in NVRAM to clock bits */ 60 u_int mk_year0; /* What year is represented on the system 61 by the chip's year counter at 0 */ 62 mk48txx_nvrd_t mk_nvrd; /* NVRAM/RTC read function */ 63 mk48txx_nvwr_t mk_nvwr; /* NVRAM/RTC write function */ 64 }; 65 66 int mk48txx_gettime(todr_chip_handle_t, struct timeval *); 67 int mk48txx_settime(todr_chip_handle_t, struct timeval *); 68 int mk48txx_getcal(todr_chip_handle_t, int *); 69 int mk48txx_setcal(todr_chip_handle_t, int); 70 u_int8_t mk48txx_def_nvrd(bus_space_tag_t, bus_space_handle_t, int); 71 void mk48txx_def_nvwr(bus_space_tag_t, bus_space_handle_t, int, u_int8_t); 72 73 int mk48txx_auto_century_adjust = 1; 74 75 struct { 76 const char *name; 77 bus_size_t nvramsz; 78 bus_size_t clkoff; 79 int flags; 80 #define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */ 81 } mk48txx_models[] = { 82 { "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 }, 83 { "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 }, 84 { "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 }, 85 { "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS }, 86 }; 87 88 todr_chip_handle_t 89 mk48txx_attach(bt, bh, model, year0, nvread, nvwrite) 90 bus_space_tag_t bt; 91 bus_space_handle_t bh; 92 const char *model; 93 int year0; 94 mk48txx_nvrd_t nvread; 95 mk48txx_nvwr_t nvwrite; 96 { 97 todr_chip_handle_t handle; 98 struct mk48txx *mk; 99 bus_size_t nvramsz, clkoff; 100 int sz; 101 int i; 102 103 printf(": %s", model); 104 105 i = sizeof(mk48txx_models)/sizeof(mk48txx_models[0]); 106 while (--i >= 0) { 107 if (strcmp(model, mk48txx_models[i].name) == 0) 108 break; 109 } 110 if (i < 0) { 111 printf(": unsupported model"); 112 return (NULL); 113 } 114 nvramsz = mk48txx_models[i].nvramsz; 115 clkoff = mk48txx_models[i].clkoff; 116 117 sz = ALIGN(sizeof(struct todr_chip_handle)) + sizeof(struct mk48txx); 118 handle = malloc(sz, M_DEVBUF, M_NOWAIT); 119 mk = (struct mk48txx *)((u_long)handle + 120 ALIGN(sizeof(struct todr_chip_handle))); 121 handle->cookie = mk; 122 handle->todr_gettime = mk48txx_gettime; 123 handle->todr_settime = mk48txx_settime; 124 handle->todr_getcal = mk48txx_getcal; 125 handle->todr_setcal = mk48txx_setcal; 126 handle->todr_setwen = NULL; 127 mk->mk_bt = bt; 128 mk->mk_bh = bh; 129 mk->mk_nvramsz = nvramsz; 130 mk->mk_clkoffset = clkoff; 131 mk->mk_year0 = year0; 132 133 if (nvread == NULL) 134 nvread = mk48txx_def_nvrd; 135 if (nvwrite == NULL) 136 nvwrite = mk48txx_def_nvwr; 137 138 mk->mk_nvrd = nvread; 139 mk->mk_nvwr = nvwrite; 140 141 return (handle); 142 } 143 144 /* 145 * Get time-of-day and convert to a `struct timeval' 146 * Return 0 on success; an error number otherwise. 147 */ 148 int 149 mk48txx_gettime(handle, tv) 150 todr_chip_handle_t handle; 151 struct timeval *tv; 152 { 153 struct mk48txx *mk = handle->cookie; 154 bus_space_tag_t bt = mk->mk_bt; 155 bus_space_handle_t bh = mk->mk_bh; 156 bus_size_t clkoff = mk->mk_clkoffset; 157 struct clock_ymdhms dt; 158 int year; 159 u_int8_t csr; 160 161 todr_wenable(handle, 1); 162 163 /* enable read (stop time) */ 164 csr = (*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_ICSR); 165 csr |= MK48TXX_CSR_READ; 166 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_ICSR, csr); 167 168 dt.dt_sec = FROMBCD((*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_ISEC)); 169 dt.dt_min = FROMBCD((*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_IMIN)); 170 dt.dt_hour = FROMBCD((*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_IHOUR)); 171 dt.dt_day = FROMBCD((*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_IDAY)); 172 dt.dt_wday = FROMBCD((*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_IWDAY)); 173 dt.dt_mon = FROMBCD((*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_IMON)); 174 year = FROMBCD((*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_IYEAR)); 175 176 year += mk->mk_year0; 177 if (year < POSIX_BASE_YEAR && mk48txx_auto_century_adjust != 0) 178 year += 100; 179 180 dt.dt_year = year; 181 182 /* time wears on */ 183 csr = (*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_ICSR); 184 csr &= ~MK48TXX_CSR_READ; 185 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_ICSR, csr); 186 todr_wenable(handle, 0); 187 188 /* simple sanity checks */ 189 if (dt.dt_mon > 12 || dt.dt_day > 31 || 190 dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60) 191 return (1); 192 193 tv->tv_sec = clock_ymdhms_to_secs(&dt); 194 tv->tv_usec = 0; 195 return (0); 196 } 197 198 /* 199 * Set the time-of-day clock based on the value of the `struct timeval' arg. 200 * Return 0 on success; an error number otherwise. 201 */ 202 int 203 mk48txx_settime(handle, tv) 204 todr_chip_handle_t handle; 205 struct timeval *tv; 206 { 207 struct mk48txx *mk = handle->cookie; 208 bus_space_tag_t bt = mk->mk_bt; 209 bus_space_handle_t bh = mk->mk_bh; 210 bus_size_t clkoff = mk->mk_clkoffset; 211 struct clock_ymdhms dt; 212 u_int8_t csr; 213 int year; 214 215 /* Note: we ignore `tv_usec' */ 216 clock_secs_to_ymdhms(tv->tv_sec, &dt); 217 218 year = dt.dt_year - mk->mk_year0; 219 if (year > 99 && mk48txx_auto_century_adjust != 0) 220 year -= 100; 221 222 todr_wenable(handle, 1); 223 /* enable write */ 224 csr = (*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_ICSR); 225 csr |= MK48TXX_CSR_WRITE; 226 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_ICSR, csr); 227 228 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_ISEC, TOBCD(dt.dt_sec)); 229 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_IMIN, TOBCD(dt.dt_min)); 230 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_IHOUR, TOBCD(dt.dt_hour)); 231 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_IWDAY, TOBCD(dt.dt_wday)); 232 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_IDAY, TOBCD(dt.dt_day)); 233 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_IMON, TOBCD(dt.dt_mon)); 234 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_IYEAR, TOBCD(year)); 235 236 /* load them up */ 237 csr = (*mk->mk_nvrd)(bt, bh, clkoff + MK48TXX_ICSR); 238 csr &= ~MK48TXX_CSR_WRITE; 239 (*mk->mk_nvwr)(bt, bh, clkoff + MK48TXX_ICSR, csr); 240 todr_wenable(handle, 0); 241 return (0); 242 } 243 244 int 245 mk48txx_getcal(handle, vp) 246 todr_chip_handle_t handle; 247 int *vp; 248 { 249 return (EOPNOTSUPP); 250 } 251 252 int 253 mk48txx_setcal(handle, v) 254 todr_chip_handle_t handle; 255 int v; 256 { 257 return (EOPNOTSUPP); 258 } 259 260 int 261 mk48txx_get_nvram_size(handle, vp) 262 todr_chip_handle_t handle; 263 bus_size_t *vp; 264 { 265 struct mk48txx *mk = handle->cookie; 266 *vp = mk->mk_nvramsz; 267 return (0); 268 } 269 270 u_int8_t 271 mk48txx_def_nvrd(bus_space_tag_t bt, bus_space_handle_t bh, int off) 272 { 273 274 return (bus_space_read_1(bt, bh, off)); 275 } 276 277 void 278 mk48txx_def_nvwr(bus_space_tag_t bt, bus_space_handle_t bh, int off, u_int8_t v) 279 { 280 281 bus_space_write_1(bt, bh, off, v); 282 } 283
Indexes created Thu Oct 30 03:10:01 GMT 2025