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      1 /*	$NetBSD: mkclock_ap.c,v 1.9 2008/04/28 20:23:30 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_ap.c,v 1.9 2008/04/28 20:23:30 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 
     43 #include <dev/clock_subr.h>
     44 #include <dev/ic/mk48txxreg.h>
     45 #include <dev/ic/mk48txxvar.h>
     46 
     47 #include <newsmips/apbus/apbusvar.h>
     48 
     49 #define MKCLOCK_AP_STRIDE	2
     50 #define MKCLOCK_AP_OFFSET	\
     51     ((MK48T02_CLKOFF + MK48TXX_ICSR) << MKCLOCK_AP_STRIDE)
     52 
     53 int  mkclock_ap_match(device_t, cfdata_t, void *);
     54 void mkclock_ap_attach(device_t, device_t, void *);
     55 static uint8_t mkclock_ap_nvrd(struct mk48txx_softc *, int);
     56 static void mkclock_ap_nvwr(struct mk48txx_softc *, int, uint8_t);
     57 
     58 CFATTACH_DECL_NEW(mkclock_ap, sizeof(struct mk48txx_softc),
     59     mkclock_ap_match, mkclock_ap_attach, NULL, NULL);
     60 
     61 int
     62 mkclock_ap_match(device_t parent, cfdata_t cf, void *aux)
     63 {
     64 	struct apbus_attach_args *apa = aux;
     65 
     66 	if (strcmp("clock", apa->apa_name) != 0)
     67 		return 0;
     68 
     69 	return 1;
     70 }
     71 
     72 void
     73 mkclock_ap_attach(device_t parent, device_t self, void *aux)
     74 {
     75 	struct mk48txx_softc *sc = device_private(self);
     76 	struct apbus_attach_args *apa = aux;
     77 
     78 	sc->sc_dev = self;
     79 	aprint_normal(" slot%d addr 0x%lx", apa->apa_slotno, apa->apa_hwbase);
     80 	if (bus_space_map(sc->sc_bst, apa->apa_hwbase - MKCLOCK_AP_OFFSET,
     81 	    MK48T02_CLKSZ, 0, &sc->sc_bsh) != 0)
     82 		aprint_error(": can't map device space\n");
     83 
     84 	sc->sc_model = "mk48t02";
     85 	sc->sc_year0 = 1900;
     86 	sc->sc_nvrd = mkclock_ap_nvrd;
     87 	sc->sc_nvwr = mkclock_ap_nvwr;
     88 
     89 	mk48txx_attach(sc);
     90 
     91 	aprint_normal("\n");
     92 }
     93 
     94 static uint8_t
     95 mkclock_ap_nvrd(struct mk48txx_softc *sc, int off)
     96 {
     97 	uint8_t rv;
     98 
     99 	rv = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_AP_STRIDE);
    100 	return rv;
    101 }
    102 
    103 static void
    104 mkclock_ap_nvwr(struct mk48txx_softc *sc, int off, uint8_t v)
    105 {
    106 
    107 	bus_space_write_4(sc->sc_bst, sc->sc_bsh, off << MKCLOCK_AP_STRIDE, v);
    108 }
    109