Home | History | Annotate | Line # | Download | only in dev
memc_68k.c revision 1.8 
      1 /*	$NetBSD: memc_68k.c,v 1.8 2012/10/27 17:18:04 chs 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 1.8 2012/10/27 17:18:04 chs Exp $");
     38 
     39 #include <sys/param.h>
     40 #include <sys/kernel.h>
     41 #include <sys/systm.h>
     42 #include <sys/device.h>
     43 #include <sys/malloc.h>
     44 
     45 #include <machine/cpu.h>
     46 #include <machine/bus.h>
     47 
     48 #include <mvme68k/dev/mainbus.h>
     49 
     50 #include <dev/mvme/memcvar.h>
     51 #include <dev/mvme/memcreg.h>
     52 #include <dev/mvme/pcctwovar.h>
     53 #include <dev/mvme/pcctworeg.h>
     54 
     55 #include "ioconf.h"
     56 
     57 int memc_match(device_t, cfdata_t, void *);
     58 void memc_attach(device_t, device_t, void *);
     59 
     60 CFATTACH_DECL_NEW(memc, sizeof(struct memc_softc),
     61     memc_match, memc_attach, NULL, NULL);
     62 
     63 
     64 /* ARGSUSED */
     65 int
     66 memc_match(device_t parent, cfdata_t cf, void *aux)
     67 {
     68 	struct mainbus_attach_args *ma = aux;
     69 	bus_space_handle_t bh;
     70 	uint8_t chipid;
     71 	int rv;
     72 
     73 #ifdef MVME68K
     74 	if (machineid != MVME_167 && machineid != MVME_177 &&
     75 	    machineid != MVME_162 && machineid != MVME_172)
     76 		return 0;
     77 #endif
     78 
     79 	if (strcmp(ma->ma_name, memc_cd.cd_name))
     80 		return 0;
     81 
     82 	if (bus_space_map(ma->ma_bust, ma->ma_offset, MEMC_REGSIZE, 0, &bh))
     83 		return 0;
     84 
     85 	rv = bus_space_peek_1(ma->ma_bust, bh, MEMC_REG_CHIP_ID, &chipid);
     86 	bus_space_unmap(ma->ma_bust, bh, MEMC_REGSIZE);
     87 
     88 	if (rv)
     89 		return 0;
     90 
     91 	/* Verify the Chip Id register is sane */
     92 	if (chipid != MEMC_CHIP_ID_MEMC040 && chipid != MEMC_CHIP_ID_MEMECC)
     93 		return 0;
     94 
     95 	return 1;
     96 }
     97 
     98 /* ARGSUSED */
     99 void
    100 memc_attach(device_t parent, device_t self, void *aux)
    101 {
    102 	struct mainbus_attach_args *ma = aux;
    103 	struct memc_softc *sc = device_private(self);
    104 
    105 	sc->sc_dev = self;
    106 	sc->sc_bust = ma->ma_bust;
    107 
    108 	/* Map the memory controller's registers */
    109 	bus_space_map(sc->sc_bust, ma->ma_offset, MEMC_REGSIZE, 0,
    110 	    &sc->sc_bush);
    111 
    112 	/* Finish initialisation in common code */
    113 	memc_init(sc);
    114 }
    115