/* $NetBSD: clock.c,v 1.13.50.1 2024/06/22 10:57:10 martin Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: Utah $Hdr: clock.c 1.18 91/01/21$ * * @(#)clock.c 8.2 (Berkeley) 1/12/94 */ #include #include #include #include #include #include /* for APCI offsets */ #include /* for frodo offsets */ #include #include #include #include #include #define FEBRUARY 2 #define BBC_SET_REG 0xe0 #define BBC_WRITE_REG 0xc2 #define BBC_READ_REG 0xc3 #define NUM_BBC_REGS 12 #define range_test(n, l, h) if ((n) < (l) || (n) > (h)) return false #define bbc_to_decimal(a,b) (bbc_registers[a] * 10 + bbc_registers[b]) static uint8_t bbc_registers[13]; static struct hil_dev *bbcaddr = BBCADDR; static volatile uint8_t *mcclock = (volatile uint8_t *)(INTIOBASE + FRODO_BASE + FRODO_CALENDAR); static bool clock_to_gmt(satime_t *); static void read_bbc(void); static uint8_t read_bbc_reg(int); static uint8_t mc_read(u_int); satime_t getsecs(void) { static bool clockinited = false; satime_t timbuf = 0; if (!clock_to_gmt(&timbuf) && !clockinited) printf("WARNING: bad date in battery clock\n"); clockinited = true; /* Battery clock does not store usec's, so forget about it. */ return timbuf; } static bool clock_to_gmt(satime_t *timbuf) { int i; satime_t tmp; int year, month, day, hour, min, sec; if (machineid == HP_425 && mmuid == MMUID_425_E) { /* 425e uses mcclock on the frodo utility chip */ while ((mc_read(MC_REGA) & MC_REGA_UIP) != 0) continue; sec = mc_read(MC_SEC); min = mc_read(MC_MIN); hour = mc_read(MC_HOUR); day = mc_read(MC_DOM); month = mc_read(MC_MONTH); year = mc_read(MC_YEAR) + 1900; } else { /* Use the traditional HIL bbc for all other models */ read_bbc(); sec = bbc_to_decimal(1, 0); min = bbc_to_decimal(3, 2); /* * Hours are different for some reason. Makes no sense really. */ hour = ((bbc_registers[5] & 0x03) * 10) + bbc_registers[4]; day = bbc_to_decimal(8, 7); month = bbc_to_decimal(10, 9); year = bbc_to_decimal(12, 11) + 1900; } if (year < POSIX_BASE_YEAR) year += 100; #ifdef CLOCK_DEBUG printf("clock todr: %u/%u/%u %u:%u:%u\n", year, month, day, hour, min, sec); #endif range_test(hour, 0, 23); range_test(day, 1, 31); range_test(month, 1, 12); tmp = 0; for (i = POSIX_BASE_YEAR; i < year; i++) tmp += days_per_year(i); if (is_leap_year(year) && month > FEBRUARY) tmp++; for (i = 1; i < month; i++) tmp += days_in_month(i); tmp += (day - 1); tmp = ((tmp * 24 + hour) * 60 + min) * 60 + sec; *timbuf = tmp; return true; } static void read_bbc(void) { int i; bool read_okay; read_okay = false; while (!read_okay) { read_okay = true; for (i = 0; i <= NUM_BBC_REGS; i++) bbc_registers[i] = read_bbc_reg(i); for (i = 0; i <= NUM_BBC_REGS; i++) if (bbc_registers[i] != read_bbc_reg(i)) read_okay = false; } } static uint8_t read_bbc_reg(int reg) { uint8_t data = reg; if (bbcaddr != NULL) { #if 0 send_hil_cmd(bbcaddr, BBC_SET_REG, &data, 1, NULL); send_hil_cmd(bbcaddr, BBC_READ_REG, NULL, 0, &data); #else HILWAIT(bbcaddr); bbcaddr->hil_cmd = BBC_SET_REG; HILWAIT(bbcaddr); bbcaddr->hil_data = data; HILWAIT(bbcaddr); bbcaddr->hil_cmd = BBC_READ_REG; HILDATAWAIT(bbcaddr); data = bbcaddr->hil_data; #endif } return data; } uint8_t mc_read(u_int reg) { uint8_t datum; mcclock[0] = (uint8_t)reg; datum = mcclock[1 << 2]; /* frodo chip has 4 byte stride */ return datum; }