sys/arch/evbarm/iq80310/obio.c

   1 /*      $NetBSD: obio.c,v 1.14.2.4 2005/11/10 13:55:53 skrll Exp $      */
   2
   3 /*
   4  * Copyright (c) 2001, 2002, 2003  Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * On-board device autoconfiguration support for Intel IQ80310
  40  * evaluation boards.
  41  *
  42  * The "obio" device node handles all of the CPLD functions,
  43  * as well ... timer, interrupts, etc.
  44  */
  45
  46 #include <sys/cdefs.h>
  47 __KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.14.2.4 2005/11/10 13:55:53 skrll Exp $");
  48
  49 #include <sys/param.h>
  50 #include <sys/systm.h>
  51 #include <sys/device.h>
  52
  53 #include <machine/autoconf.h>
  54 #include <machine/bus.h>
  55
  56 #include <evbarm/iq80310/iq80310reg.h>
  57 #include <evbarm/iq80310/iq80310var.h>
  58 #include <evbarm/iq80310/obiovar.h>
  59
  60 #include "locators.h"
  61
  62 int     obio_match(struct device *, struct cfdata *, void *);
  63 void    obio_attach(struct device *, struct device *, void *);
  64
  65 CFATTACH_DECL(obio, sizeof(struct device),
  66     obio_match, obio_attach, NULL, NULL);
  67
  68 int     obio_print(void *, const char *);
  69 int     obio_search(struct device *, struct cfdata *,
  70                     const int *, void *);
  71
  72 /* there can be only one */
  73 int     obio_found;
  74
  75 int
  76 obio_match(struct device *parent, struct cfdata *cf, void *aux)
  77 {
  78 #if 0
  79         struct mainbus_attach_args *ma = aux;
  80 #endif
  81
  82         if (obio_found)
  83                 return (0);
  84
  85 #if 1
  86         /* XXX Shoot arch/arm/mainbus in the head. */
  87         return (1);
  88 #else
  89         if (strcmp(cf->cf_name, ma->ma_name) == 0)
  90                 return (1);
  91
  92         return (0);
  93 #endif
  94 }
  95
  96 void
  97 obio_attach(struct device *parent, struct device *self, void *aux)
  98 {
  99
 100         obio_found = 1;
 101
 102 #if defined(IOP310_TEAMASA_NPWR)
 103         /*
 104          * These boards don't have revision/backplane detect registers.
 105          * Just ignore it.
 106          */
 107         printf("\n");
 108 #else /* Default to stock IQ80310 */
 109     {
 110         /*
 111          * Yes, we're using knowledge of the obio bus space internals,
 112          * here.
 113          */
 114         uint8_t board_rev = CPLD_READ(IQ80310_BOARD_REV);
 115         uint8_t cpld_rev = CPLD_READ(IQ80310_CPLD_REV);
 116         uint8_t backplane = CPLD_READ(IQ80310_BACKPLANE_DET);
 117
 118         printf(": board rev. %c, CPLD rev. %c, backplane %spresent\n",
 119             BOARD_REV(board_rev), CPLD_REV(cpld_rev),
 120             (backplane & 1) ? "" : "not ");
 121     }
 122 #endif /* list of IQ80310-based designs */
 123
 124         /*
 125          * Attach all the on-board devices as described in the kernel
 126          * configuration file.
 127          */
 128         config_search_ia(obio_search, self, "obio", NULL);
 129 }
 130
 131 int
 132 obio_print(void *aux, const char *pnp)
 133 {
 134         struct obio_attach_args *oba = aux;
 135
 136         aprint_normal(" addr 0x%08lx", oba->oba_addr);
 137         if (oba->oba_size != OBIOCF_SIZE_DEFAULT)
 138                 aprint_normal("-0x%08lx", oba->oba_addr + (oba->oba_size - 1));
 139         if (oba->oba_width != OBIOCF_WIDTH_DEFAULT)
 140                 aprint_normal(" width %d", oba->oba_width);
 141         if (oba->oba_irq != -1)
 142                 aprint_normal(" xint3 %d", IRQ_XINT3(oba->oba_irq));
 143
 144         return (UNCONF);
 145 }
 146
 147 int
 148 obio_search(struct device *parent, struct cfdata *cf,
 149             const int *ldesc, void *aux)
 150 {
 151         struct obio_attach_args oba;
 152
 153         oba.oba_st = &obio_bs_tag;
 154         oba.oba_addr = cf->cf_loc[OBIOCF_ADDR];
 155         oba.oba_size = cf->cf_loc[OBIOCF_SIZE];
 156         oba.oba_width = cf->cf_loc[OBIOCF_WIDTH];
 157         if (cf->cf_loc[OBIOCF_XINT3] != OBIOCF_XINT3_DEFAULT)
 158                 oba.oba_irq = XINT3_IRQ(cf->cf_loc[OBIOCF_XINT3]);
 159         else
 160                 oba.oba_irq = -1;
 161
 162         if (config_match(parent, cf, &oba) > 0)
 163                 config_attach(parent, cf, &oba, obio_print);
 164
 165         return (0);
 166 }