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timekeeper.c revision 1.3 
      1 /*	$NetBSD: timekeeper.c,v 1.3 2002/02/23 17:18:54 scw Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Steve C. Woodford.
      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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Attachment interface for the Time-Keeper RAMs on mvme boards.
     41  *
     42  * XXXSCW: Needs to be extended to allow read/write to NVRAM by
     43  * userland application.
     44  */
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/device.h>
     49 #include <sys/conf.h>
     50 
     51 #include <machine/cpu.h>
     52 #include <machine/bus.h>
     53 
     54 #include <dev/mvme/clockvar.h>
     55 
     56 #include <mvme68k/dev/mainbus.h>
     57 
     58 struct timekeeper_softc {
     59 	struct device		sc_dev;
     60 	bus_space_tag_t		sc_bust;
     61 	bus_space_handle_t	sc_bush;
     62 	bus_size_t		sc_size;
     63 };
     64 
     65 int timekeeper_match(struct device *, struct cfdata *, void *);
     66 void timekeeper_attach(struct device *, struct device *, void *);
     67 
     68 struct cfattach timekeeper_ca = {
     69 	sizeof(struct timekeeper_softc), timekeeper_match, timekeeper_attach
     70 };
     71 
     72 extern struct cfdriver timekeeper_cd;
     73 
     74 int
     75 timekeeper_match(parent, cf, aux)
     76 	struct device *parent;
     77 	struct cfdata *cf;
     78 	void *aux;
     79 {
     80 	struct mainbus_attach_args *ma = aux;
     81 
     82 	if (strcmp(ma->ma_name, timekeeper_cd.cd_name))
     83 		return (0);
     84 
     85 	return (1);
     86 }
     87 
     88 void
     89 timekeeper_attach(parent, self, aux)
     90 	struct device *parent;
     91 	struct device *self;
     92 	void *aux;
     93 {
     94 	struct timekeeper_softc *sc = (struct timekeeper_softc *)self;
     95 	struct mainbus_attach_args *ma = aux;
     96 	todr_chip_handle_t todr;
     97 	const char *model;
     98 
     99 	sc->sc_bust = ma->ma_bust;
    100 
    101 	if (machineid == MVME_147) {
    102 		sc->sc_size = MK48T02_CLKSZ;
    103 		model = "mk48t02";
    104 	} else {
    105 		sc->sc_size = MK48T08_CLKSZ;
    106 		model = "mk48t08";
    107 	}
    108 
    109 	bus_space_map(ma->ma_bust, ma->ma_offset, sc->sc_size, 0, &sc->sc_bush);
    110 
    111 	todr = mk48txx_attach(sc->sc_bust, sc->sc_bush, model, YEAR0,
    112 	    NULL, NULL);
    113 	if (todr == NULL)
    114 		panic("\ntimekeeper_attach");
    115 
    116 	printf(" Time-Keeper RAM\n");
    117 	printf("%s: %ld bytes NVRAM plus Realtime Clock\n",
    118 	    sc->sc_dev.dv_xname, sc->sc_size);
    119 
    120 	clock_rtc_config(todr);
    121 }
    122