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      1 /*	$NetBSD: mkclock_sbdio.c,v 1.7 2008/04/28 20:23:18 martin 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  *
     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 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: mkclock_sbdio.c,v 1.7 2008/04/28 20:23:18 martin Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/kernel.h>
     37 #include <sys/systm.h>
     38 #include <sys/device.h>
     39 
     40 #include <machine/cpu.h>
     41 #include <machine/bus.h>
     42 #include <machine/sbdiovar.h>
     43 
     44 #include <dev/clock_subr.h>
     45 
     46 #include <dev/ic/mk48txxreg.h>
     47 #include <dev/ic/mk48txxvar.h>
     48 
     49 #include "ioconf.h"
     50 
     51 #define MKCLOCK_SBD_STRIDE	2
     52 
     53 int  mkclock_sbdio_match(device_t, cfdata_t, void *);
     54 void mkclock_sbdio_attach(device_t, device_t, void *);
     55 static uint8_t mkclock_sbdio_nvrd(struct mk48txx_softc *, int);
     56 static void mkclock_sbdio_nvwr(struct mk48txx_softc *, int, uint8_t);
     57 
     58 CFATTACH_DECL_NEW(mkclock_sbdio, sizeof(struct mk48txx_softc),
     59     mkclock_sbdio_match, mkclock_sbdio_attach, NULL, NULL);
     60 
     61 int
     62 mkclock_sbdio_match(device_t parent, cfdata_t cf, void *aux)
     63 {
     64 	struct sbdio_attach_args *sa = aux;
     65 
     66 	if (strcmp("mkclock", sa->sa_name) != 0)
     67 		return 0;
     68 
     69 	return 1;
     70 }
     71 
     72 void
     73 mkclock_sbdio_attach(device_t parent, device_t self, void *aux)
     74 {
     75 	struct mk48txx_softc *sc = device_private(self);
     76 	struct sbdio_attach_args *sa = aux;
     77 	bus_size_t size;
     78 
     79 	sc->sc_dev = self;
     80 	switch (sa->sa_flags) {
     81 	case 0x0000:
     82 		sc->sc_model = "mk48t08";
     83 		size = MK48T08_CLKSZ;
     84 		break;
     85 
     86 	case 0x0001:
     87 		sc->sc_model = "mk48t18";
     88 		size = MK48T18_CLKSZ;
     89 		break;
     90 
     91 	default:
     92 		/* assume MK48T18 */
     93 		sc->sc_model = "mk48t18";
     94 		size = MK48T18_CLKSZ;
     95 		break;
     96 	}
     97 
     98 	sc->sc_bst = sa->sa_bust;
     99 	if (bus_space_map(sc->sc_bst, sa->sa_addr1, size, 0,
    100 	    &sc->sc_bsh) != 0) {
    101 		aprint_error(": can't map device space\n");
    102 		return;
    103 	}
    104 
    105 	sc->sc_year0 = 2000;	/* XXX Is this OK? */
    106 	sc->sc_nvrd = mkclock_sbdio_nvrd;
    107 	sc->sc_nvwr = mkclock_sbdio_nvwr;
    108 
    109 	mk48txx_attach(sc);
    110 
    111 	aprint_normal("\n");
    112 }
    113 
    114 static uint8_t
    115 mkclock_sbdio_nvrd(struct mk48txx_softc *sc, int off)
    116 {
    117 	uint8_t rv;
    118 
    119 	rv = bus_space_read_1(sc->sc_bst, sc->sc_bsh,
    120 	    off << MKCLOCK_SBD_STRIDE);
    121 	return rv;
    122 }
    123 
    124 static void
    125 mkclock_sbdio_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
    126 {
    127 
    128 	bus_space_write_1(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_SBD_STRIDE, v);
    129 }
    130