sys/arch/mvme68k/dev/memc_68k.c

   1 /*      $NetBSD: memc_68k.c,v 1.6 2008/01/12 09:54:22 tsutsui 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 1.6 2008/01/12 09:54:22 tsutsui 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(struct device *, struct cfdata *, void *);
  58 void memc_attach(struct device *, struct device *, void *);
  59
  60 CFATTACH_DECL(memc, sizeof(struct memc_softc),
  61     memc_match, memc_attach, NULL, NULL);
  62
  63
  64 /* ARGSUSED */
  65 int
  66 memc_match(struct device *parent, struct cfdata *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(struct device *parent, struct device *self, void *aux)
 101 {
 102         struct mainbus_attach_args *ma = aux;
 103         struct memc_softc *sc = (struct memc_softc *)self;
 104
 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 }