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ofbus.c revision 1.27 
      1 /*	$NetBSD: ofbus.c,v 1.27 2021/04/24 23:36:57 thorpej 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 1.27 2021/04/24 23:36:57 thorpej 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_NEW(ofbus, 0,
     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], type[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 	/* attach displays first */
     99 	for (child = OF_child(oba->oba_phandle); child != 0;
    100 	     child = OF_peer(child)) {
    101 		oba2.oba_busname = "ofw";
    102 		type[0] = 0;
    103 		if (OF_getprop(child, "device_type", type, sizeof(type)) <= 0)
    104 			continue;
    105 		if (strncmp(type, "display", sizeof(type)) != 0)
    106 			continue;
    107 		of_packagename(child, name, sizeof name);
    108 		oba2.oba_phandle = child;
    109 		for (oba2.oba_unit = 0; oba2.oba_unit < units;
    110 		     oba2.oba_unit++) {
    111 			if (units > 1) {
    112 				snprintf(oba2.oba_ofname,
    113 				    sizeof(oba2.oba_ofname), "%s@%d", name,
    114 				    oba2.oba_unit);
    115 			} else {
    116 				strlcpy(oba2.oba_ofname, name,
    117 				    sizeof(oba2.oba_ofname));
    118 			}
    119 			config_found(dev, &oba2, ofbus_print,
    120 			    CFARG_DEVHANDLE, devhandle_from_of(child),
    121 			    CFARG_EOL);
    122 		}
    123 	}
    124 
    125 	/* now the rest */
    126 	for (child = OF_child(oba->oba_phandle); child != 0;
    127 	     child = OF_peer(child)) {
    128 		oba2.oba_busname = "ofw";
    129 		type[0] = 0;
    130 		if (OF_getprop(child, "device_type", type, sizeof(type)) > 0) {
    131 			if (strncmp(type, "display", sizeof(type)) == 0)
    132 				continue;
    133 		}
    134 		of_packagename(child, name, sizeof name);
    135 		oba2.oba_phandle = child;
    136 		for (oba2.oba_unit = 0; oba2.oba_unit < units;
    137 		     oba2.oba_unit++) {
    138 			if (units > 1) {
    139 				snprintf(oba2.oba_ofname,
    140 				    sizeof(oba2.oba_ofname), "%s@%d", name,
    141 				    oba2.oba_unit);
    142 			} else {
    143 				strlcpy(oba2.oba_ofname, name,
    144 				    sizeof(oba2.oba_ofname));
    145 			}
    146 			config_found(dev, &oba2, ofbus_print,
    147 			    CFARG_DEVHANDLE, devhandle_from_of(child),
    148 			    CFARG_EOL);
    149 		}
    150 	}
    151 
    152 }
    153