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memc_68k.c revision 1.3 
      1 /*	$NetBSD: memc_68k.c,v 1.3 2002/10/02 05:28:14 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000, 2002 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  * Support for the MEMECC and MEMC40 memory controllers on MVME68K
     41  */
     42 
     43 #include <sys/param.h>
     44 #include <sys/kernel.h>
     45 #include <sys/systm.h>
     46 #include <sys/device.h>
     47 #include <sys/malloc.h>
     48 
     49 #include <machine/cpu.h>
     50 #include <machine/bus.h>
     51 
     52 #include <mvme68k/dev/mainbus.h>
     53 
     54 #include <dev/mvme/memcvar.h>
     55 #include <dev/mvme/memcreg.h>
     56 #include <dev/mvme/pcctwovar.h>
     57 #include <dev/mvme/pcctworeg.h>
     58 
     59 
     60 int memc_match(struct device *, struct cfdata *, void *);
     61 void memc_attach(struct device *, struct device *, void *);
     62 
     63 CFATTACH_DECL(memc, sizeof(struct memc_softc),
     64     memc_match, memc_attach, NULL, NULL);
     65 
     66 extern struct cfdriver memc_cd;
     67 
     68 
     69 /* ARGSUSED */
     70 int
     71 memc_match(parent, cf, aux)
     72 	struct device *parent;
     73 	struct cfdata *cf;
     74 	void *aux;
     75 {
     76 	struct mainbus_attach_args *ma = aux;
     77 	bus_space_handle_t bh;
     78 	u_int8_t chipid;
     79 	int rv;
     80 
     81 #ifdef MVME68K
     82 	if (machineid != MVME_167 && machineid != MVME_177 &&
     83 	    machineid != MVME_162 && machineid != MVME_172)
     84 		return (0);
     85 #endif
     86 
     87 	if (strcmp(ma->ma_name, memc_cd.cd_name))
     88 		return (0);
     89 
     90 	if (bus_space_map(ma->ma_bust, ma->ma_offset, MEMC_REGSIZE, 0, &bh))
     91 		return (0);
     92 
     93 	rv = bus_space_peek_1(ma->ma_bust, bh, MEMC_REG_CHIP_ID, &chipid);
     94 	bus_space_unmap(ma->ma_bust, bh, MEMC_REGSIZE);
     95 
     96 	if (rv)
     97 		return (0);
     98 
     99 	/* Verify the Chip Id register is sane */
    100 	if (chipid != MEMC_CHIP_ID_MEMC040 && chipid != MEMC_CHIP_ID_MEMECC)
    101 		return (0);
    102 
    103 	return (1);
    104 }
    105 
    106 /* ARGSUSED */
    107 void
    108 memc_attach(parent, self, aux)
    109 	struct device *parent;
    110 	struct device *self;
    111 	void *aux;
    112 {
    113 	struct mainbus_attach_args *ma = aux;
    114 	struct memc_softc *sc = (struct memc_softc *) self;
    115 
    116 	sc->sc_bust = ma->ma_bust;
    117 
    118 	/* Map the memory controller's registers */
    119 	bus_space_map(sc->sc_bust, ma->ma_offset, MEMC_REGSIZE, 0,
    120 	    &sc->sc_bush);
    121 
    122 	/* Finish initialisation in common code */
    123 	memc_init(sc);
    124 }
    125