| mc146818reg.h (59868) | mc146818reg.h (137821) |
|---|---|
| 1/* $FreeBSD: head/sys/dev/mc146818/mc146818reg.h 59868 2000-05-01 19:54:26Z peter $ */ 2/* $NetBSD: mc146818reg.h,v 1.2 1997/03/12 06:53:42 cgd Exp $ */ 3 | |
| 4/* 5 * Copyright (c) 1995 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and 9 * its documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions --- 7 unchanged lines hidden (view full) --- 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. | 1/* 2 * Copyright (c) 1995 Carnegie-Mellon University. 3 * All rights reserved. 4 * 5 * Permission to use, copy, modify and distribute this software and 6 * its documentation is hereby granted, provided that both the copyright 7 * notice and this permission notice appear in all copies of the 8 * software, derivative works or modified versions, and any portions --- 7 unchanged lines hidden (view full) --- 16 * 17 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 18 * School of Computer Science 19 * Carnegie Mellon University 20 * Pittsburgh PA 15213-3890 21 * 22 * any improvements or extensions that they make and grant Carnegie the 23 * rights to redistribute these changes. |
| 24 * 25 * from: NetBSD: mc146818reg.h,v 1.5 2003/11/02 11:07:45 wiz Exp 26 * 27 * $FreeBSD: head/sys/dev/mc146818/mc146818reg.h 137821 2004-11-17 16:37:25Z marius $ |
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| 27 */ 28 29/* 30 * Definitions for the Motorola MC146818A Real Time Clock. | 28 */ 29 30/* 31 * Definitions for the Motorola MC146818A Real Time Clock. |
| 31 * They also apply for the (compatible) Dallas Semicontuctor DS1287A RTC. | 32 * They also apply for the (compatible) Dallas Semiconductor DS1287A RTC. |
| 32 * 33 * Though there are undoubtedly other (better) sources, this material was 34 * culled from the DEC "KN121 System Module Programmer's Reference 35 * Information." 36 * 37 * The MC146818A has 16 registers. The first 10 contain time-of-year 38 * and alarm data. The rest contain various control and status bits. 39 * --- 97 unchanged lines hidden (view full) --- 137/* 138 * Time base (divisor select) constants (Control register A) 139 */ 140#define MC_BASE_4_MHz 0x00 /* 4MHz crystal */ 141#define MC_BASE_1_MHz 0x10 /* 1MHz crystal */ 142#define MC_BASE_32_KHz 0x20 /* 32KHz crystal */ 143#define MC_BASE_NONE 0x60 /* actually, both of these reset */ 144#define MC_BASE_RESET 0x70 | 33 * 34 * Though there are undoubtedly other (better) sources, this material was 35 * culled from the DEC "KN121 System Module Programmer's Reference 36 * Information." 37 * 38 * The MC146818A has 16 registers. The first 10 contain time-of-year 39 * and alarm data. The rest contain various control and status bits. 40 * --- 97 unchanged lines hidden (view full) --- 138/* 139 * Time base (divisor select) constants (Control register A) 140 */ 141#define MC_BASE_4_MHz 0x00 /* 4MHz crystal */ 142#define MC_BASE_1_MHz 0x10 /* 1MHz crystal */ 143#define MC_BASE_32_KHz 0x20 /* 32KHz crystal */ 144#define MC_BASE_NONE 0x60 /* actually, both of these reset */ 145#define MC_BASE_RESET 0x70 |
| 145 146/* 147 * A collection of TOD/Alarm registers. 148 */ 149typedef u_int mc_todregs[MC_NTODREGS]; 150 151/* 152 * Get all of the TOD/Alarm registers 153 * Must be called at splhigh(), and with the RTC properly set up. 154 */ 155#define MC146818_GETTOD(dev, regs) \ 156 do { \ 157 int i; \ 158 \ 159 /* update in progress; spin loop */ \ 160 while (MCCLOCK_READ(dev, MC_REGA) & MC_REGA_UIP) \ 161 ; \ 162 \ 163 /* read all of the tod/alarm regs */ \ 164 for (i = 0; i < MC_NTODREGS; i++) \ 165 (*regs)[i] = MCCLOCK_READ(dev, i); \ 166 } while (0); 167 168/* 169 * Set all of the TOD/Alarm registers 170 * Must be called at splhigh(), and with the RTC properly set up. 171 */ 172#define MC146818_PUTTOD(dev, regs) \ 173 do { \ 174 int i; \ 175 \ 176 /* stop updates while setting */ \ 177 MCCLOCK_WRITE(dev, MC_REGB, \ 178 MCCLOCK_READ(dev, MC_REGB) | MC_REGB_SET); \ 179 \ 180 /* write all of the tod/alarm regs */ \ 181 for (i = 0; i < MC_NTODREGS; i++) \ 182 MCCLOCK_WRITE(dev, i, (*regs)[i]); \ 183 \ 184 /* reenable updates */ \ 185 MCCLOCK_WRITE(dev, MC_REGB, \ 186 MCCLOCK_READ(dev, MC_REGB) & ~MC_REGB_SET); \ 187 } while (0); | |