sys/arch/sandpoint/isa/mcclock_isa.c

   1 /*      $NetBSD: mcclock_isa.c,v 1.3 2008/03/28 19:05:50 tsutsui 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
 102 Permission to use, copy, modify, and distribute this software and
 103 its documentation for any purpose and without fee is hereby
 104 granted, provided that the above copyright notice appears in all
 105 copies and that both the copyright notice and this permission notice
 106 appear in supporting documentation, and that the name of Intel
 107 not be used in advertising or publicity pertaining to distribution
 108 of the software without specific, written prior permission.
 109
 110 INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
 111 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
 112 IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
 113 CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 114 LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
 115 NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 116 WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 117 */
 118
 119 #include <sys/cdefs.h>
 120 __KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.3 2008/03/28 19:05:50 tsutsui 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 <machine/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
 142 static int mcclock_isa_probe(device_t, cfdata_t, void *);
 143 static void mcclock_isa_attach(device_t, device_t, void *);
 144
 145 CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc),
 146     mcclock_isa_probe, mcclock_isa_attach, NULL, NULL);
 147
 148 static unsigned
 149 mcclock_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
 156 static void
 157 mcclock_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
 164 int
 165 mcclock_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
 207 void
 208 mcclock_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, no interrupts please.
 229          */
 230         mcclock_isa_write(sc, MC_REGB, MC_REGB_24HR);
 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 }