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mkclock_ap.c revision 1.5.6.1 
      1 /*	$NetBSD: mkclock_ap.c,v 1.5.6.1 2008/04/03 12:42:22 mjf 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_ap.c,v 1.5.6.1 2008/04/03 12:42:22 mjf 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 
     50 #include <dev/clock_subr.h>
     51 #include <dev/ic/mk48txxreg.h>
     52 #include <dev/ic/mk48txxvar.h>
     53 
     54 #include <newsmips/apbus/apbusvar.h>
     55 
     56 #define MKCLOCK_AP_STRIDE	2
     57 #define MKCLOCK_AP_OFFSET	\
     58     ((MK48T02_CLKOFF + MK48TXX_ICSR) << MKCLOCK_AP_STRIDE)
     59 
     60 int  mkclock_ap_match(device_t, cfdata_t, void *);
     61 void mkclock_ap_attach(device_t, device_t, void *);
     62 static uint8_t mkclock_ap_nvrd(struct mk48txx_softc *, int);
     63 static void mkclock_ap_nvwr(struct mk48txx_softc *, int, uint8_t);
     64 
     65 CFATTACH_DECL_NEW(mkclock_ap, sizeof(struct mk48txx_softc),
     66     mkclock_ap_match, mkclock_ap_attach, NULL, NULL);
     67 
     68 int
     69 mkclock_ap_match(device_t parent, cfdata_t cf, void *aux)
     70 {
     71 	struct apbus_attach_args *apa = aux;
     72 
     73 	if (strcmp("clock", apa->apa_name) != 0)
     74 		return 0;
     75 
     76 	return 1;
     77 }
     78 
     79 void
     80 mkclock_ap_attach(device_t parent, device_t self, void *aux)
     81 {
     82 	struct mk48txx_softc *sc = device_private(self);
     83 	struct apbus_attach_args *apa = aux;
     84 
     85 	sc->sc_dev = self;
     86 	aprint_normal(" slot%d addr 0x%lx", apa->apa_slotno, apa->apa_hwbase);
     87 	if (bus_space_map(sc->sc_bst, apa->apa_hwbase - MKCLOCK_AP_OFFSET,
     88 	    MK48T02_CLKSZ, 0, &sc->sc_bsh) != 0)
     89 		aprint_error(": can't map device space\n");
     90 
     91 	sc->sc_model = "mk48t02";
     92 	sc->sc_year0 = 1900;
     93 	sc->sc_nvrd = mkclock_ap_nvrd;
     94 	sc->sc_nvwr = mkclock_ap_nvwr;
     95 
     96 	mk48txx_attach(sc);
     97 
     98 	aprint_normal("\n");
     99 }
    100 
    101 static uint8_t
    102 mkclock_ap_nvrd(struct mk48txx_softc *sc, int off)
    103 {
    104 	uint8_t rv;
    105 
    106 	rv = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_AP_STRIDE);
    107 	return rv;
    108 }
    109 
    110 static void
    111 mkclock_ap_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
    112 {
    113 
    114 	bus_space_write_4(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_AP_STRIDE, v);
    115 }
    116