sys/dev/ofw/ofbus.c

   1 /*      $NetBSD: ofbus.c,v 1.23 2009/05/12 13:17:37 cegger Exp $        */
   2
   3 /*
   4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
   5  * Copyright (C) 1995, 1996 TooLs GmbH.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by TooLs GmbH.
  19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __KERNEL_RCSID(0, "$NetBSD: ofbus.c,v 1.23 2009/05/12 13:17:37 cegger Exp $");
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/device.h>
  40
  41 #include <dev/ofw/openfirm.h>
  42
  43 int ofbus_match(device_t, cfdata_t, void *);
  44 void ofbus_attach(device_t, device_t, void *);
  45 static int ofbus_print(void *, const char *);
  46
  47 CFATTACH_DECL(ofbus, sizeof(struct device),
  48     ofbus_match, ofbus_attach, NULL, NULL);
  49
  50 static int
  51 ofbus_print(void *aux, const char *pnp)
  52 {
  53         struct ofbus_attach_args *oba = aux;
  54
  55         if (pnp)
  56                 aprint_normal("%s at %s", oba->oba_ofname, pnp);
  57         else
  58                 aprint_normal(" (%s)", oba->oba_ofname);
  59         return UNCONF;
  60 }
  61
  62 int
  63 ofbus_match(device_t parent, cfdata_t cf, void *aux)
  64 {
  65         struct ofbus_attach_args *oba = aux;
  66
  67         if (strcmp(oba->oba_busname, "ofw"))
  68                 return (0);
  69         if (!OF_child(oba->oba_phandle))
  70                 return (0);
  71         return (1);
  72 }
  73
  74 void
  75 ofbus_attach(device_t parent, device_t dev, void *aux)
  76 {
  77         struct ofbus_attach_args *oba = aux;
  78         struct ofbus_attach_args oba2;
  79         char name[64];
  80         int child, units;
  81
  82         printf("\n");
  83
  84         /*
  85          * This is a hack to make the probe work on the scsi (and ide) bus.
  86          * YES, I THINK IT IS A BUG IN THE OPENFIRMWARE TO NOT PROBE ALL
  87          * DEVICES ON THESE BUSSES.
  88          */
  89         units = 1;
  90         name[0] = 0;
  91         if (OF_getprop(oba->oba_phandle, "name", name, sizeof name) > 0) {
  92                 if (!strcmp(name, "scsi"))
  93                         units = 7; /* What about wide or hostid != 7?   XXX */
  94                 else if (!strcmp(name, "ide"))
  95                         units = 2;
  96         }
  97
  98         for (child = OF_child(oba->oba_phandle); child != 0;
  99              child = OF_peer(child)) {
 100                 oba2.oba_busname = "ofw";
 101                 of_packagename(child, name, sizeof name);
 102                 oba2.oba_phandle = child;
 103                 for (oba2.oba_unit = 0; oba2.oba_unit < units;
 104                      oba2.oba_unit++) {
 105                         if (units > 1) {
 106                                 snprintf(oba2.oba_ofname,
 107                                     sizeof(oba2.oba_ofname), "%s@%d", name,
 108                                     oba2.oba_unit);
 109                         } else {
 110                                 strlcpy(oba2.oba_ofname, name,
 111                                     sizeof(oba2.oba_ofname));
 112                         }
 113                         config_found(dev, &oba2, ofbus_print);
 114                 }
 115         }
 116 }