mcclock_pnpbus.c revision 1.3
1 /* $NetBSD: mcclock_pnpbus.c,v 1.3 2006/07/12 21:28:33 garbled 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 * 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 * PNPBus driver for the mc146818 compatible time-of-day clock found on all 40 * IBM Prep machines. This one is only discernable from the motorola clock 41 * part by the interface portion of the residual data. (or by the small vendor 42 * item chip id) 43 * NOTE: The IBM machines actually have either a dallas 1385 or a dallas 1585 44 * chip. This driver should probably be replaced by something that does that 45 * one day. 46 */ 47 48 #include <sys/cdefs.h> 49 __KERNEL_RCSID(0, "$NetBSD: mcclock_pnpbus.c,v 1.3 2006/07/12 21:28:33 garbled Exp $"); 50 51 #include <sys/types.h> 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/device.h> 55 #include <sys/malloc.h> 56 57 #include <machine/bus.h> 58 #include <machine/intr.h> 59 #include <machine/isa_machdep.h> 60 #include <machine/residual.h> 61 #include <machine/chpidpnp.h> 62 /* XXX */ 63 #include <machine/pio.h> 64 65 #include <dev/clock_subr.h> 66 #include <dev/ic/mc146818reg.h> 67 #include <dev/ic/mc146818var.h> 68 #include <dev/ic/ds1687reg.h> 69 70 #include <dev/isa/isavar.h> 71 72 #include <prep/pnpbus/pnpbusvar.h> 73 74 static int mcclock_pnpbus_probe(struct device *, struct cfdata *, void *); 75 static void mcclock_pnpbus_attach(struct device *, struct device *, void *); 76 77 extern struct cfdriver mcclock_cd; 78 79 CFATTACH_DECL(mcclock_pnpbus, sizeof (struct mc146818_softc), 80 mcclock_pnpbus_probe, mcclock_pnpbus_attach, NULL, NULL); 81 82 void mcclock_pnpbus_write(struct mc146818_softc *, u_int, u_int); 83 u_int mcclock_pnpbus_read(struct mc146818_softc *, u_int); 84 void ds1585_reboot(void); 85 86 int have_ds1585 = 0; 87 #define MCCLOCK_STD_DEV 0 88 89 static int 90 mcclock_pnpbus_probe(struct device *parent, struct cfdata *match, void *aux) 91 { 92 struct pnpbus_dev_attach_args *pna = aux; 93 int ret = 0; 94 95 if (strcmp(pna->pna_devid, "PNP0B00") == 0 && 96 pna->subtype == RealTimeClock && pna->chipid == DallasRTC) 97 ret = 1; 98 if (strcmp(pna->pna_devid, "PNP0B00") == 0 && 99 pna->subtype == RealTimeClock && pna->chipid == Dallas1585) 100 ret = 1; 101 102 if (ret) 103 pnpbus_scan(pna, pna->pna_ppc_dev); 104 return ret; 105 } 106 107 static void 108 mcclock_pnpbus_attach(struct device *parent, struct device *self, void *aux) 109 { 110 struct mc146818_softc *sc = (void *)self; 111 struct pnpbus_dev_attach_args *pna = aux; 112 113 sc->sc_bst = pna->pna_iot; 114 if (pnpbus_io_map(&pna->pna_res, 0, &sc->sc_bst, &sc->sc_bsh)) { 115 /* XXX should we panic instead? */ 116 aprint_error("%s: couldn't map clock I/O space", 117 device_xname(self)); 118 return; 119 } 120 121 if (pna->chipid == Dallas1585) 122 have_ds1585 = 1; 123 sc->sc_year0 = 1900; 124 sc->sc_mcread = mcclock_pnpbus_read; 125 sc->sc_mcwrite = mcclock_pnpbus_write; 126 sc->sc_flag = MC146818_BCD; 127 mc146818_attach(sc); 128 129 aprint_normal("\n"); 130 131 (*sc->sc_mcwrite)(sc, MC_REGB, MC_REGB_24HR); 132 todr_attach(&sc->sc_handle); 133 } 134 135 void 136 ds1585_reboot(void) 137 { 138 struct mc146818_softc *sc = mcclock_cd.cd_devs[MCCLOCK_STD_DEV]; 139 int i, j; 140 141 if (!have_ds1585) 142 return; 143 144 /* monitors b0: 05,03,01 b1: 49, WIE=1 */ 145 146 (*sc->sc_mcwrite)(sc, DS1687_ASEC, 0); 147 148 /* If we are nearing 59 minutes on the hour, the math is too complex 149 * to compute out when to reboot, so we just wait for the clock to 150 * flip back over to zero, then set the alarm time. 151 */ 152 i = (*sc->sc_mcread)(sc, DS1687_MIN); 153 if (i == 0x58) { 154 (*sc->sc_mcwrite)(sc, DS1687_AMIN, 0x59); 155 (*sc->sc_mcwrite)(sc, DS1687_ASEC, 0x59); 156 i = 0x59; 157 } else { 158 while (i == 0x59) { 159 delay(100); 160 i = (*sc->sc_mcread)(sc, DS1687_MIN); 161 } 162 i += 2; 163 if ((i & 0x0f) > 8) 164 i = (i & 0xf0) + 0x10; 165 (*sc->sc_mcwrite)(sc, DS1687_AMIN, i); 166 } 167 i = (*sc->sc_mcread)(sc, DS1687_HOUR); 168 (*sc->sc_mcwrite)(sc, DS1687_AHOUR, i); 169 j = (*sc->sc_mcread)(sc, DS1687_DOM); /* get date */ 170 i = (*sc->sc_mcread)(sc, DS1687_CONTROLA); 171 i |= DS1687_BANK1; /* set DV0 on */ 172 (*sc->sc_mcwrite)(sc, DS1687_CONTROLA, i); 173 /* write today into wakeup */ 174 (*sc->sc_mcwrite)(sc, DS1687_BANK1_ADATE, j); 175 i = (*sc->sc_mcread)(sc, 0x4b); /* bank1 reg B */ 176 i |= 0x82; /* WIE + ABE */ 177 (*sc->sc_mcwrite)(sc, 0x4b, i); 178 i = (*sc->sc_mcread)(sc, 0x4b); 179 /* XXX power control bit on 7024/7025 */ 180 outb(PREP_BUS_SPACE_IO + 0x856, 1); 181 for (;;); 182 } 183 184 void 185 mcclock_pnpbus_write(struct mc146818_softc *sc, u_int reg, u_int datum) 186 { 187 bus_space_tag_t iot; 188 bus_space_handle_t ioh; 189 190 iot = sc->sc_bst; 191 ioh = sc->sc_bsh; 192 193 bus_space_write_1(iot, ioh, 0, reg); 194 bus_space_write_1(iot, ioh, 1, datum); 195 } 196 197 u_int 198 mcclock_pnpbus_read(struct mc146818_softc *sc, u_int reg) 199 { 200 bus_space_tag_t iot; 201 bus_space_handle_t ioh; 202 u_int datum; 203 204 iot = sc->sc_bst; 205 ioh = sc->sc_bsh; 206 207 bus_space_write_1(iot, ioh, 0, reg); 208 datum = bus_space_read_1(iot, ioh, 1); 209 210 return (datum); 211 } 212
Indexes created Wed Oct 01 15:09:59 GMT 2025