sys/arch/evbppc/pmppc/dev/ds17485.c

   1 /*      $NetBSD: ds17485.c,v 1.5 2008/03/29 05:42:46 tsutsui Exp $      */
   2
   3 /*
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Lennart Augustsson (lennart@augustsson.net) at Sandburst Corp.
   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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*-
  33  * Copyright (c) 1990 The Regents of the University of California.
  34  * All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * William Jolitz and Don Ahn.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)clock.c     7.2 (Berkeley) 5/12/91
  64  */
  65 /*-
  66  * Copyright (c) 1993, 1994 Charles M. Hannum.
  67  *
  68  * This code is derived from software contributed to Berkeley by
  69  * William Jolitz and Don Ahn.
  70  *
  71  * Redistribution and use in source and binary forms, with or without
  72  * modification, are permitted provided that the following conditions
  73  * are met:
  74  * 1. Redistributions of source code must retain the above copyright
  75  *    notice, this list of conditions and the following disclaimer.
  76  * 2. Redistributions in binary form must reproduce the above copyright
  77  *    notice, this list of conditions and the following disclaimer in the
  78  *    documentation and/or other materials provided with the distribution.
  79  * 3. All advertising materials mentioning features or use of this software
  80  *    must display the following acknowledgement:
  81  *      This product includes software developed by the University of
  82  *      California, Berkeley and its contributors.
  83  * 4. Neither the name of the University nor the names of its contributors
  84  *    may be used to endorse or promote products derived from this software
  85  *    without specific prior written permission.
  86  *
  87  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  88  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  89  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  90  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  91  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  92  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  93  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  94  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  95  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  96  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  97  * SUCH DAMAGE.
  98  *
  99  *      @(#)clock.c     7.2 (Berkeley) 5/12/91
 100  */
 101 /*
 102  * Mach Operating System
 103  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 104  * All Rights Reserved.
 105  *
 106  * Permission to use, copy, modify and distribute this software and its
 107  * documentation is hereby granted, provided that both the copyright
 108  * notice and this permission notice appear in all copies of the
 109  * software, derivative works or modified versions, and any portions
 110  * thereof, and that both notices appear in supporting documentation.
 111  *
 112  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 113  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 114  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 115  *
 116  * Carnegie Mellon requests users of this software to return to
 117  *
 118  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 119  *  School of Computer Science
 120  *  Carnegie Mellon University
 121  *  Pittsburgh PA 15213-3890
 122  *
 123  * any improvements or extensions that they make and grant Carnegie Mellon
 124  * the rights to redistribute these changes.
 125  */
 126 /*
 127   Copyright 1988, 1989 by Intel Corporation, Santa Clara, California.
 128
 129                 All Rights Reserved
 130
 131 Permission to use, copy, modify, and distribute this software and
 132 its documentation for any purpose and without fee is hereby
 133 granted, provided that the above copyright notice appears in all
 134 copies and that both the copyright notice and this permission notice
 135 appear in supporting documentation, and that the name of Intel
 136 not be used in advertising or publicity pertaining to distribution
 137 of the software without specific, written prior permission.
 138
 139 INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
 140 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
 141 IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
 142 CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 143 LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
 144 NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 145 WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 146 */
 147
 148 /*
 149  * Primitive clock interrupt routines.
 150  */
 151
 152 #include <sys/cdefs.h>
 153 __KERNEL_RCSID(0, "$NetBSD: ds17485.c,v 1.5 2008/03/29 05:42:46 tsutsui Exp $");
 154
 155 #include <sys/param.h>
 156 #include <sys/systm.h>
 157 #include <sys/kernel.h>
 158 #include <sys/device.h>
 159
 160 #include <machine/cpu.h>
 161 #include <machine/intr.h>
 162 #include <machine/bus.h>
 163
 164 #include <dev/clock_subr.h>
 165 #include <dev/ic/mc146818reg.h>
 166 #include <dev/ic/mc146818var.h>
 167
 168 #include <arch/evbppc/pmppc/dev/mainbus.h>
 169 #include <machine/pmppc.h>
 170
 171 static int      rtc_match(device_t, cfdata_t, void *);
 172 static void     rtc_attach(device_t, device_t, void *);
 173
 174 static u_int rtc_read(struct mc146818_softc *, u_int);
 175 static void rtc_write(struct mc146818_softc *, u_int, u_int);
 176
 177 CFATTACH_DECL_NEW(rtc, sizeof(struct mc146818_softc),
 178     rtc_match, rtc_attach, NULL, NULL);
 179
 180 static int      rtc_attached = 0;
 181 int
 182 rtc_match(device_t parent, cfdata_t cf, void *aux)
 183 {
 184         struct mainbus_attach_args *maa = aux;
 185
 186         return (!rtc_attached && strcmp(maa->mb_name, "rtc") == 0);
 187 }
 188
 189 void
 190 rtc_attach(device_t parent, device_t self, void *aux)
 191 {
 192         struct mc146818_softc *sc = device_private(self);
 193         struct mainbus_attach_args *maa = aux;
 194
 195         sc->sc_dev = self;
 196         sc->sc_bst = maa->mb_bt;
 197         if (bus_space_map(sc->sc_bst, maa->mb_addr, PMPPC_RTC_SIZE, 0,
 198                           &sc->sc_bsh)) {
 199                 aprint_error(": can't map i/o space\n");
 200                 return;
 201         }
 202
 203         rtc_attached = 1;
 204 #ifdef DEBUG
 205         rtc_print();
 206 #endif
 207         rtc_write(sc, MC_REGA, MC_BASE_32_KHz | MC_RATE_1024_Hz);
 208         rtc_write(sc, MC_REGB, MC_REGB_24HR);
 209
 210         sc->sc_mcread = rtc_read;
 211         sc->sc_mcwrite = rtc_write;
 212         sc->sc_flag = 0;
 213         sc->sc_year0 = 1900;
 214         mc146818_attach(sc);
 215
 216         /* aprint_normal(": Dallas Semiconductor DS17485\n"); */
 217         aprint_normal("\n");
 218 }
 219
 220 u_int
 221 rtc_read(struct mc146818_softc  *sc, u_int reg)
 222 {
 223
 224         return (bus_space_read_1(sc->sc_bst, sc->sc_bsh, reg));
 225 }
 226
 227 void
 228 rtc_write(struct mc146818_softc *sc, u_int reg, u_int datum)
 229 {
 230
 231         bus_space_write_1(sc->sc_bst, sc->sc_bsh, reg, datum);
 232 }