1/* $NetBSD: mcclock_isa.c,v 1.5 2011/07/01 20:34:53 dyoung Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz and Don Ahn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)clock.c 7.2 (Berkeley) 5/12/91 35 */ 36/*- 37 * Copyright (c) 1993, 1994 Charles M. Hannum. 38 * 39 * This code is derived from software contributed to Berkeley by 40 * William Jolitz and Don Ahn. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)clock.c 7.2 (Berkeley) 5/12/91 71 */ 72/* 73 * Mach Operating System 74 * Copyright (c) 1991,1990,1989 Carnegie Mellon University 75 * All Rights Reserved. 76 * 77 * Permission to use, copy, modify and distribute this software and its 78 * documentation is hereby granted, provided that both the copyright 79 * notice and this permission notice appear in all copies of the 80 * software, derivative works or modified versions, and any portions 81 * thereof, and that both notices appear in supporting documentation. 82 * 83 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 84 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 85 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 86 * 87 * Carnegie Mellon requests users of this software to return to 88 * 89 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 90 * School of Computer Science 91 * Carnegie Mellon University 92 * Pittsburgh PA 15213-3890 93 * 94 * any improvements or extensions that they make and grant Carnegie Mellon 95 * the rights to redistribute these changes. 96 */ 97/* 98 Copyright 1988, 1989 by Intel Corporation, Santa Clara, California. 99 100 All Rights Reserved 101 102Permission to use, copy, modify, and distribute this software and 103its documentation for any purpose and without fee is hereby 104granted, provided that the above copyright notice appears in all 105copies and that both the copyright notice and this permission notice 106appear in supporting documentation, and that the name of Intel 107not be used in advertising or publicity pertaining to distribution 108of the software without specific, written prior permission. 109 110INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 111INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, 112IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 113CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 114LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 115NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 116WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 117*/ 118 119#include <sys/cdefs.h> 120__KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.5 2011/07/01 20:34:53 dyoung Exp $"); 121 122#include <sys/param.h> 123#include <sys/systm.h> 124#include <sys/kernel.h> 125#include <sys/device.h> 126#include <sys/time.h> 127 128#include <sys/bus.h> 129 130#include <dev/clock_subr.h> 131#include <dev/isa/isareg.h> 132#include <dev/isa/isavar.h> 133#include <dev/ic/mc146818reg.h> 134#include <dev/ic/mc146818var.h> 135 136/* 137 * We only deal with the RTC portion of the mc146818 right now. Later 138 * we might want to add support for the NVRAM portion, since it 139 * appears that some systems use that. 140 */ 141 142static int mcclock_isa_probe(device_t, cfdata_t, void *); 143static void mcclock_isa_attach(device_t, device_t, void *); 144 145CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc), 146 mcclock_isa_probe, mcclock_isa_attach, NULL, NULL); 147 148static unsigned 149mcclock_isa_read(struct mc146818_softc *sc, unsigned reg) 150{ 151 152 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg); 153 return bus_space_read_1(sc->sc_bst, sc->sc_bsh, 1); 154} 155 156static void 157mcclock_isa_write(struct mc146818_softc *sc, unsigned reg, unsigned datum) 158{ 159 160 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg); 161 bus_space_write_1(sc->sc_bst, sc->sc_bsh, 1, datum); 162} 163 164int 165mcclock_isa_probe(device_t parent, cfdata_t cf, void *aux) 166{ 167 struct isa_attach_args *ia = aux; 168 bus_space_handle_t ioh; 169 170 if (ia->ia_nio < 1) 171 return 0; 172 173 if (ISA_DIRECT_CONFIG(ia)) 174 return 0; 175 176 if ((ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT) && 177 (ia->ia_io[0].ir_addr != IO_RTC)) 178 return 0; 179 180 if (ia->ia_niomem > 0 && 181 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM)) 182 return 0; 183 184 if (ia->ia_nirq > 0 && 185 (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)) 186 return 0; 187 188 if (ia->ia_ndrq > 0 && 189 (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)) 190 return 0; 191 192 if (bus_space_map(ia->ia_iot, IO_RTC, 2, 0, &ioh)) 193 return 0; 194 bus_space_unmap(ia->ia_iot, ioh, 2); 195 196 ia->ia_io[0].ir_addr = IO_RTC; 197 ia->ia_io[0].ir_size = 2; 198 ia->ia_nio = 1; 199 200 ia->ia_niomem = 0; 201 ia->ia_nirq = 0; 202 ia->ia_ndrq = 0; 203 204 return 1; 205} 206 207void 208mcclock_isa_attach(device_t parent, device_t self, void *aux) 209{ 210 struct mc146818_softc *sc = device_private(self); 211 struct isa_attach_args *ia = aux; 212 213 sc->sc_dev = self; 214 sc->sc_bst = ia->ia_iot; 215 if (bus_space_map(sc->sc_bst, ia->ia_io[0].ir_addr, 216 ia->ia_io[0].ir_size, 0, &sc->sc_bsh)) { 217 aprint_error(": can't map registers!\n"); 218 return; 219 } 220 221 /* 222 * Select a 32KHz crystal, periodic interrupt every 1024 Hz. 223 * XXX: We disable periodic interrupts, so why set a rate? 224 */ 225 mcclock_isa_write(sc, MC_REGA, MC_BASE_32_KHz | MC_RATE_1024_Hz); 226 227 /* 228 * 24 Hour clock, binary-format, no auto-DST and no interrupts please. 229 */ 230 mcclock_isa_write(sc, MC_REGB, MC_REGB_24HR | MC_REGB_BINARY); 231 232 sc->sc_year0 = 1900; 233 sc->sc_flag = 0; 234 sc->sc_mcread = mcclock_isa_read; 235 sc->sc_mcwrite = mcclock_isa_write; 236#if 0 237 /* 238 * XXX: perhaps on some systems we should manage the century byte? 239 * For now we don't worry about it. (Ugly MD code.) 240 */ 241 sc->sc_getcent = mcclock_isa_getcent; 242 sc->sc_setcent = mcclock_isa_setcent; 243#endif 244 mc146818_attach(sc); 245 aprint_normal("\n"); 246} 247