1 /* $NetBSD: ds1286reg.h,v 1.2 2002/02/25 17:37:47 kleink Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Rafal K. Boni 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Originally based on mc146818reg.h, with the following license: 31 * 32 * Copyright (c) 1995 Carnegie-Mellon University. 33 * All rights reserved. 34 * 35 * Permission to use, copy, modify and distribute this software and 36 * its documentation is hereby granted, provided that both the copyright 37 * notice and this permission notice appear in all copies of the 38 * software, derivative works or modified versions, and any portions 39 * thereof, and that both notices appear in supporting documentation. 40 * 41 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 42 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 43 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 44 * 45 * Carnegie Mellon requests users of this software to return to 46 * 47 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 48 * School of Computer Science 49 * Carnegie Mellon University 50 * Pittsburgh PA 15213-3890 51 * 52 * any improvements or extensions that they make and grant Carnegie the 53 * rights to redistribute these changes. 54 */ 55 56 /* 57 * Definitions for the Dallas Semiconductor DS1286/DS1386 Real Time Clock. 58 * 59 * Plucked right from the Dallas Semicomductor specs available at 60 * http://pdfserv.maxim-ic.com/arpdf/DS1286.pdf and 61 * http://pdfserv.maxim-ic.com/arpdf/DS1386-DS1386P.pdf 62 * 63 * The DS1286 and 1386 have 14 clock-related registers and some amount 64 * of user registers (50 for the 1286, 8K or 32K for the 1386). The 65 * first eleven registers contain time-of-day and alarm data, the rest 66 * contain various control bits and the watchdog timer functionality. 67 * 68 * Since the locations of these ports and the method used to access 69 * them can be machine-dependent, the low-level details of reading 70 * and writing the RTC's registers are handled by machine-specific 71 * functions. 72 * 73 * The Dalla chip always stored time-of-day and alarm data in BCD. 74 * The "hour" time-of-year and alarm fields can either be expressed in 75 * AM/PM format, or in 24-hour format. If AM/PM format is chosen, the 76 * hour fields can have the values: 1-12 and 21-32 (the latter being 77 * PM). If the 24-hour format is chosen, they can have the values 78 * 0-23. The hour format is selectable separately for the time and 79 * alarm fields, and is controller by bit 6 of the respective register. 80 */ 81 82 /* 83 * The registers, and the bits within each register. 84 */ 85 86 #define DS_SUBSEC 0x0 /* Time of year: hundredths of seconds (0-99) */ 87 #define DS_SEC 0x1 /* Time of year: seconds (0-59) */ 88 #define DS_MIN 0x2 /* Time of year: minutes (0-59) */ 89 #define DS_AMIN 0x3 /* Alarm: minutes */ 90 #define DS_HOUR 0x4 /* Time of year: hour (see above) */ 91 92 #define DS_HOUR_12MODE 0x40 /* Hour mode: 12-hour (on), 24 (off) */ 93 #define DS_HOUR_12HR_PM 0x20 /* AM/PM in 12-hour mode: on = PM */ 94 #define DS_HOUR_12HR_MASK 0x1f /* Mask for hours in 12hour mode */ 95 #define DS_HOUR_24HR_MASK 0x3f /* Mask for hours in 24hour mode */ 96 97 #define DS_AHOUR 0x5 /* Alarm: hour */ 98 #define DS_DOW 0x6 /* Time of year: day of week (1-7) */ 99 #define DS_ADOW 0x7 /* Alarm: day of week (1-7) */ 100 #define DS_DOM 0x8 /* Time of year: day of month (1-31) */ 101 #define DS_MONTH 0x9 /* Time of year: month (1-12), wave generator */ 102 103 #define DS_MONTH_MASK 0x3f /* Mask to extract month */ 104 #define DS_WAVEGEN_MASK 0xc0 /* Mask to extract wave bits */ 105 106 #define DS_YEAR 0xA /* Time of year: year in century (0-99) */ 107 108 #define DS_CONTROL 0xB /* Control register A */ 109 110 #define DS_TE 0x80 /* Update in progress (on == disable update) */ 111 #define DS_INTSWAP 0x40 /* Swap INTA, INTB outputs */ 112 #define DS_INTBSRC 0x20 /* INTB source (on) or sink (off) current */ 113 #define DS_INTAPLS 0x10 /* INTA pulse (on) or level (off) mode */ 114 #define DS_WAM 0x08 /* Watchdog alarm mask */ 115 #define DS_TDM 0x04 /* Time-of-day alarm mask */ 116 #define DS_WAF 0x02 /* Watchdog alarm flag */ 117 #define DS_TDF 0x01 /* Time-of-day alarm flag */ 118 119 #define DS_NREGS 0xd /* 14 registers; CMOS follows */ 120 #define DS_NTODREGS 0xb /* 10 of those regs are for TOD and alarm */ 121 122 #define DS_NVRAM_START 0xe /* start of NVRAM: offset 14 */ 123 124 /* NVRAM size depends on the chip -- the 1286 only has 50 bytes, whereas 125 * the 1386 can have 8K or 32K 126 */ 127 #define DS_NVRAM_SIZE 50 /* 50 bytes of NVRAM */ 128 129 /* 130 * RTC register/NVRAM read and write functions -- machine-dependent. 131 * Appropriately manipulate RTC registers to get/put data values. 132 */ 133 u_int ds1286_read __P((void *sc, u_int reg)); 134 void ds1286_write __P((void *sc, u_int reg, u_int datum)); 135 136 /* 137 * A collection of TOD/Alarm registers. 138 */ 139 typedef u_int ds_todregs[DS_NTODREGS]; 140 141 /* 142 * Get all of the TOD/Alarm registers 143 * Must be called at splhigh(), and with the RTC properly set up. 144 */ 145 #define DS1286_GETTOD(sc, regs) \ 146 do { \ 147 int i; \ 148 u_int ctl; \ 149 \ 150 /* turn off update for now */ \ 151 ctl = ds1286_read(sc, DS_CONTROL); \ 152 ds1286_write(sc, DS_CONTROL, ctl | DS_TE); \ 153 \ 154 /* read all of the tod/alarm regs */ \ 155 for (i = 0; i < DS_NTODREGS; i++) \ 156 (*regs)[i] = ds1286_read(sc, i); \ 157 \ 158 /* turn update back on */ \ 159 ds1286_write(sc, DS_CONTROL, ctl); \ 160 } while (0); 161 162 /* 163 * Set all of the TOD/Alarm registers 164 * Must be called at splhigh(), and with the RTC properly set up. 165 */ 166 #define DS1286_PUTTOD(sc, regs) \ 167 do { \ 168 int i; \ 169 u_int ctl; \ 170 \ 171 /* turn off update for now */ \ 172 ctl = ds1286_read(sc, DS_CONTROL); \ 173 ds1286_write(sc, DS_CONTROL, ctl | DS_TE); \ 174 \ 175 /* write all of the tod/alarm regs */ \ 176 for (i = 0; i < DS_NTODREGS; i++) \ 177 ds1286_write(sc, i, (*regs)[i]); \ 178 \ 179 /* turn update back on */ \ 180 ds1286_write(sc, DS_CONTROL, ctl); \ 181 } while (0); 182