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mkclock_sbdio.c revision 1.3 
      1 /*	$NetBSD: mkclock_sbdio.c,v 1.3 2008/03/28 20:26:12 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      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 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: mkclock_sbdio.c,v 1.3 2008/03/28 20:26:12 tsutsui Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <sys/kernel.h>
     44 #include <sys/systm.h>
     45 #include <sys/device.h>
     46 
     47 #include <machine/cpu.h>
     48 #include <machine/bus.h>
     49 #include <machine/sbdiovar.h>
     50 
     51 #include <dev/clock_subr.h>
     52 
     53 #include <dev/ic/mk48txxreg.h>
     54 #include <dev/ic/mk48txxvar.h>
     55 
     56 #include "ioconf.h"
     57 
     58 #define MKCLOCK_SBD_STRIDE	2
     59 
     60 int  mkclock_sbdio_match(device_t, cfdata_t, void *);
     61 void mkclock_sbdio_attach(device_t, device_t, void *);
     62 static uint8_t mkclock_sbdio_nvrd(struct mk48txx_softc *, int);
     63 static void mkclock_sbdio_nvwr(struct mk48txx_softc *, int, uint8_t);
     64 
     65 CFATTACH_DECL_NEW(mkclock_sbdio, sizeof(struct mk48txx_softc),
     66     mkclock_sbdio_match, mkclock_sbdio_attach, NULL, NULL);
     67 
     68 int
     69 mkclock_sbdio_match(device_t parent, cfdata_t cf, void *aux)
     70 {
     71 	struct sbdio_attach_args *sa = aux;
     72 
     73 	if (strcmp("mkclock", sa->sa_name) != 0)
     74 		return 0;
     75 
     76 	return 1;
     77 }
     78 
     79 void
     80 mkclock_sbdio_attach(device_t parent, device_t self, void *aux)
     81 {
     82 	struct mk48txx_softc *sc = device_private(self);
     83 	struct sbdio_attach_args *sa = aux;
     84 	bus_size_t size;
     85 
     86 	aprint_normal(" at %p", (void *)sa->sa_addr1);
     87 
     88 	sc->sc_bst = sa->sa_bust;
     89 	if (bus_space_map(sc->sc_bst, sa->sa_addr1, size, 0,
     90 	    &sc->sc_bsh) != 0) {
     91 		aprint_error(": can't map device space\n");
     92 		return;
     93 	}
     94 
     95 	switch (sa->sa_flags) {
     96 	case 0x0000:
     97 		sc->sc_model = "mk48t08";
     98 		size = MK48T08_CLKSZ;
     99 		break;
    100 
    101 	case 0x0001:
    102 		sc->sc_model = "mk48t18";
    103 		size = MK48T18_CLKSZ;
    104 		break;
    105 
    106 	default:
    107 		aprint_normal(": unknown model, assume");
    108 		sc->sc_model = "mk48t18";
    109 		size = MK48T18_CLKSZ;
    110 		break;
    111 	}
    112 
    113 	sc->sc_year0 = 2000;	/* XXX Is this OK? */
    114 	sc->sc_nvrd = mkclock_sbdio_nvrd;
    115 	sc->sc_nvwr = mkclock_sbdio_nvwr;
    116 
    117 	mk48txx_attach(sc);
    118 
    119 	aprint_normal("\n");
    120 }
    121 
    122 static uint8_t
    123 mkclock_sbdio_nvrd(struct mk48txx_softc *sc, int off)
    124 {
    125 	uint8_t rv;
    126 
    127 	rv = bus_space_read_1(sc->sc_bst, sc->sc_bsh,
    128 	    off << MKCLOCK_SBD_STRIDE);
    129 	return rv;
    130 }
    131 
    132 static void
    133 mkclock_sbdio_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
    134 {
    135 
    136 	bus_space_write_1(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_SBD_STRIDE, v);
    137 }
    138