sys/arch/algor/dev/mcclock_mainbus.c

   1 /*      $NetBSD: mcclock_mainbus.c,v 1.9 2008/03/28 19:05:49 tsutsui Exp $      */
   2
   3 /*
   4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
   5  * All rights reserved.
   6  *
   7  * Author: Chris G. Demetriou
   8  *
   9  * Permission to use, copy, modify and distribute this software and
  10  * its documentation is hereby granted, provided that both the copyright
  11  * notice and this permission notice appear in all copies of the
  12  * software, derivative works or modified versions, and any portions
  13  * thereof, and that both notices appear in supporting documentation.
  14  *
  15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  18  *
  19  * Carnegie Mellon requests users of this software to return to
  20  *
  21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  22  *  School of Computer Science
  23  *  Carnegie Mellon University
  24  *  Pittsburgh PA 15213-3890
  25  *
  26  * any improvements or extensions that they make and grant Carnegie the
  27  * rights to redistribute these changes.
  28  */
  29
  30 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  31
  32 __KERNEL_RCSID(0, "$NetBSD: mcclock_mainbus.c,v 1.9 2008/03/28 19:05:49 tsutsui Exp $");
  33
  34 #include <sys/param.h>
  35 #include <sys/kernel.h>
  36 #include <sys/systm.h>
  37 #include <sys/device.h>
  38
  39 #include <machine/autoconf.h>
  40 #include <machine/bus.h>
  41
  42 #include <dev/clock_subr.h>
  43 #include <dev/ic/mc146818reg.h>
  44 #include <dev/ic/mc146818var.h>
  45
  46 int     mcclock_mainbus_match(device_t, cfdata_t, void *);
  47 void    mcclock_mainbus_attach(device_t, device_t, void *);
  48
  49 CFATTACH_DECL_NEW(mcclock_mainbus, sizeof(struct mc146818_softc),
  50     mcclock_mainbus_match, mcclock_mainbus_attach, NULL, NULL);
  51
  52 void    mcclock_mainbus_write(struct mc146818_softc *, u_int, u_int);
  53 u_int   mcclock_mainbus_read(struct mc146818_softc *, u_int);
  54
  55 int
  56 mcclock_mainbus_match(device_t parent, cfdata_t cf, void *aux)
  57 {
  58         struct mainbus_attach_args *ma = aux;
  59
  60         if (strcmp(ma->ma_name, cf->cf_name) == 0)
  61                 return (1);
  62
  63         return (0);
  64 }
  65
  66 void
  67 mcclock_mainbus_attach(device_t parent, device_t self, void *aux)
  68 {
  69         struct mc146818_softc *sc = device_private(self);
  70         struct mainbus_attach_args *ma = aux;
  71
  72         sc->sc_dev = self;
  73         sc->sc_bst = ma->ma_st;
  74         if (bus_space_map(sc->sc_bst, ma->ma_addr, 2, 0, &sc->sc_bsh))
  75                 panic("mcclock_mainbus_attach: couldn't map clock I/O space");
  76
  77         /*
  78          * Turn interrupts off, just in case.  Need to leave the SQWE
  79          * set, because that's the DRAM refresh signal on Rev. B boards.
  80          */
  81         mcclock_mainbus_write(sc, MC_REGB, MC_REGB_SQWE | MC_REGB_BINARY |
  82             MC_REGB_24HR);
  83
  84         sc->sc_mcread = mcclock_mainbus_read;
  85         sc->sc_mcwrite = mcclock_mainbus_write;
  86         sc->sc_getcent = NULL;
  87         sc->sc_setcent = NULL;
  88         sc->sc_flag = 0;
  89
  90         /* Algor uses year 1980 as offset */
  91         sc->sc_year0 = 1980;
  92
  93         mc146818_attach(sc);
  94
  95         aprint_normal("\n");
  96 }
  97
  98 void
  99 mcclock_mainbus_write(struct mc146818_softc *sc, u_int reg, u_int datum)
 100 {
 101         bus_space_tag_t iot = sc->sc_bst;
 102         bus_space_handle_t ioh = sc->sc_bsh;
 103
 104         bus_space_write_1(iot, ioh, 0, reg);
 105         bus_space_write_1(iot, ioh, 1, datum);
 106 }
 107
 108 u_int
 109 mcclock_mainbus_read(struct mc146818_softc *sc, u_int reg)
 110 {
 111         bus_space_tag_t iot = sc->sc_bst;
 112         bus_space_handle_t ioh = sc->sc_bsh;
 113
 114         bus_space_write_1(iot, ioh, 0, reg);
 115         return bus_space_read_1(iot, ioh, 1);
 116 }