1/* $NetBSD: mcclock_pnpbus.c,v 1.9 2008/04/28 20:23:33 martin Exp $ */ 2/*- 3 * Copyright (c) 2006 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Tim Rightnour 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* 32 * PNPBus driver for the mc146818 compatible time-of-day clock found on all 33 * IBM Prep machines. This one is only discernable from the motorola clock 34 * part by the interface portion of the residual data. (or by the small vendor 35 * item chip id) 36 * NOTE: The IBM machines actually have either a dallas 1385 or a dallas 1585 37 * chip. This driver should probably be replaced by something that does that 38 * one day. 39 */ 40 41#include <sys/cdefs.h> 42__KERNEL_RCSID(0, "$NetBSD: mcclock_pnpbus.c,v 1.9 2008/04/28 20:23:33 martin Exp $"); 43 44#include <sys/types.h> 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/device.h> 48#include <sys/malloc.h> 49 50#include <sys/bus.h> 51#include <machine/intr.h> 52#include <machine/isa_machdep.h> 53#include <machine/residual.h> 54#include <machine/chpidpnp.h> 55/* XXX */ 56#include <machine/pio.h> 57 58#include <dev/clock_subr.h> 59#include <dev/ic/mc146818reg.h> 60#include <dev/ic/mc146818var.h> 61#include <dev/ic/ds1687reg.h> 62 63#include <dev/isa/isavar.h> 64 65#include <prep/pnpbus/pnpbusvar.h> 66 67static int mcclock_pnpbus_probe(device_t, cfdata_t, void *); 68static void mcclock_pnpbus_attach(device_t, device_t, void *); 69 70extern struct cfdriver mcclock_cd; 71 72CFATTACH_DECL_NEW(mcclock_pnpbus, sizeof(struct mc146818_softc), 73 mcclock_pnpbus_probe, mcclock_pnpbus_attach, NULL, NULL); 74 75void mcclock_pnpbus_write(struct mc146818_softc *, u_int, u_int); 76u_int mcclock_pnpbus_read(struct mc146818_softc *, u_int); 77void ds1585_reboot(void); 78 79int have_ds1585 = 0; 80#define MCCLOCK_STD_DEV 0 81 82static int 83mcclock_pnpbus_probe(device_t parent, cfdata_t cf, void *aux) 84{ 85 struct pnpbus_dev_attach_args *pna = aux; 86 int ret = 0; 87 88 if (strcmp(pna->pna_devid, "PNP0B00") == 0 && 89 pna->subtype == RealTimeClock && pna->chipid == DallasRTC) 90 ret = 1; 91 if (strcmp(pna->pna_devid, "PNP0B00") == 0 && 92 pna->subtype == RealTimeClock && pna->chipid == Dallas1585) 93 ret = 1; 94 95 if (ret) 96 pnpbus_scan(pna, pna->pna_ppc_dev); 97 return ret; 98} 99 100static void 101mcclock_pnpbus_attach(device_t parent, device_t self, void *aux) 102{ 103 struct mc146818_softc *sc = device_private(self); 104 struct pnpbus_dev_attach_args *pna = aux; 105 106 sc->sc_dev = self; 107 sc->sc_bst = pna->pna_iot; 108 if (pnpbus_io_map(&pna->pna_res, 0, &sc->sc_bst, &sc->sc_bsh)) { 109 /* XXX should we panic instead? */ 110 aprint_error(": couldn't map clock I/O space\n"); 111 return; 112 } 113 114 if (pna->chipid == Dallas1585) 115 have_ds1585 = 1; 116 sc->sc_year0 = 1900; 117 sc->sc_mcread = mcclock_pnpbus_read; 118 sc->sc_mcwrite = mcclock_pnpbus_write; 119 sc->sc_flag = MC146818_BCD; 120 mc146818_attach(sc); 121 122 aprint_normal("\n"); 123 124 (*sc->sc_mcwrite)(sc, MC_REGB, MC_REGB_24HR); 125} 126 127void 128ds1585_reboot(void) 129{ 130 struct mc146818_softc *sc; 131 int i, j; 132 133 if (!have_ds1585) 134 return; 135 136 sc = device_lookup_private(&mcclock_cd, MCCLOCK_STD_DEV); 137 138 /* monitors b0: 05,03,01 b1: 49, WIE=1 */ 139 140 (*sc->sc_mcwrite)(sc, DS1687_ASEC, 0); 141 142 /* If we are nearing 59 minutes on the hour, the math is too complex 143 * to compute out when to reboot, so we just wait for the clock to 144 * flip back over to zero, then set the alarm time. 145 */ 146 i = (*sc->sc_mcread)(sc, DS1687_MIN); 147 if (i == 0x58) { 148 (*sc->sc_mcwrite)(sc, DS1687_AMIN, 0x59); 149 (*sc->sc_mcwrite)(sc, DS1687_ASEC, 0x59); 150 i = 0x59; 151 } else { 152 while (i == 0x59) { 153 delay(100); 154 i = (*sc->sc_mcread)(sc, DS1687_MIN); 155 } 156 i += 2; 157 if ((i & 0x0f) > 8) 158 i = (i & 0xf0) + 0x10; 159 (*sc->sc_mcwrite)(sc, DS1687_AMIN, i); 160 } 161 i = (*sc->sc_mcread)(sc, DS1687_HOUR); 162 (*sc->sc_mcwrite)(sc, DS1687_AHOUR, i); 163 j = (*sc->sc_mcread)(sc, DS1687_DOM); /* get date */ 164 i = (*sc->sc_mcread)(sc, DS1687_CONTROLA); 165 i |= DS1687_BANK1; /* set DV0 on */ 166 (*sc->sc_mcwrite)(sc, DS1687_CONTROLA, i); 167 /* write today into wakeup */ 168 (*sc->sc_mcwrite)(sc, DS1687_BANK1_ADATE, j); 169 i = (*sc->sc_mcread)(sc, 0x4b); /* bank1 reg B */ 170 i |= 0x82; /* WIE + ABE */ 171 (*sc->sc_mcwrite)(sc, 0x4b, i); 172 i = (*sc->sc_mcread)(sc, 0x4b); 173 /* XXX power control bit on 7024/7025 */ 174 outb(PREP_BUS_SPACE_IO + 0x856, 1); 175 for (;;); 176} 177 178void 179mcclock_pnpbus_write(struct mc146818_softc *sc, u_int reg, u_int datum) 180{ 181 bus_space_tag_t iot; 182 bus_space_handle_t ioh; 183 184 iot = sc->sc_bst; 185 ioh = sc->sc_bsh; 186 187 bus_space_write_1(iot, ioh, 0, reg); 188 bus_space_write_1(iot, ioh, 1, datum); 189} 190 191u_int 192mcclock_pnpbus_read(struct mc146818_softc *sc, u_int reg) 193{ 194 bus_space_tag_t iot; 195 bus_space_handle_t ioh; 196 u_int datum; 197 198 iot = sc->sc_bst; 199 ioh = sc->sc_bsh; 200 201 bus_space_write_1(iot, ioh, 0, reg); 202 datum = bus_space_read_1(iot, ioh, 1); 203 204 return (datum); 205} 206