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      1 /*	$NetBSD: memc_68k.c,v 1.9 2023/12/20 00:40:44 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  *
     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 /*
     33  * Support for the MEMECC and MEMC40 memory controllers on MVME68K
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: memc_68k.c,v 1.9 2023/12/20 00:40:44 thorpej Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/kernel.h>
     41 #include <sys/systm.h>
     42 #include <sys/device.h>
     43 
     44 #include <machine/cpu.h>
     45 #include <machine/bus.h>
     46 
     47 #include <mvme68k/dev/mainbus.h>
     48 
     49 #include <dev/mvme/memcvar.h>
     50 #include <dev/mvme/memcreg.h>
     51 #include <dev/mvme/pcctwovar.h>
     52 #include <dev/mvme/pcctworeg.h>
     53 
     54 #include "ioconf.h"
     55 
     56 int memc_match(device_t, cfdata_t, void *);
     57 void memc_attach(device_t, device_t, void *);
     58 
     59 CFATTACH_DECL_NEW(memc, sizeof(struct memc_softc),
     60     memc_match, memc_attach, NULL, NULL);
     61 
     62 
     63 /* ARGSUSED */
     64 int
     65 memc_match(device_t parent, cfdata_t cf, void *aux)
     66 {
     67 	struct mainbus_attach_args *ma = aux;
     68 	bus_space_handle_t bh;
     69 	uint8_t chipid;
     70 	int rv;
     71 
     72 #ifdef MVME68K
     73 	if (machineid != MVME_167 && machineid != MVME_177 &&
     74 	    machineid != MVME_162 && machineid != MVME_172)
     75 		return 0;
     76 #endif
     77 
     78 	if (strcmp(ma->ma_name, memc_cd.cd_name))
     79 		return 0;
     80 
     81 	if (bus_space_map(ma->ma_bust, ma->ma_offset, MEMC_REGSIZE, 0, &bh))
     82 		return 0;
     83 
     84 	rv = bus_space_peek_1(ma->ma_bust, bh, MEMC_REG_CHIP_ID, &chipid);
     85 	bus_space_unmap(ma->ma_bust, bh, MEMC_REGSIZE);
     86 
     87 	if (rv)
     88 		return 0;
     89 
     90 	/* Verify the Chip Id register is sane */
     91 	if (chipid != MEMC_CHIP_ID_MEMC040 && chipid != MEMC_CHIP_ID_MEMECC)
     92 		return 0;
     93 
     94 	return 1;
     95 }
     96 
     97 /* ARGSUSED */
     98 void
     99 memc_attach(device_t parent, device_t self, void *aux)
    100 {
    101 	struct mainbus_attach_args *ma = aux;
    102 	struct memc_softc *sc = device_private(self);
    103 
    104 	sc->sc_dev = self;
    105 	sc->sc_bust = ma->ma_bust;
    106 
    107 	/* Map the memory controller's registers */
    108 	bus_space_map(sc->sc_bust, ma->ma_offset, MEMC_REGSIZE, 0,
    109 	    &sc->sc_bush);
    110 
    111 	/* Finish initialisation in common code */
    112 	memc_init(sc);
    113 }
    114