1 /* $NetBSD: ofbus.c,v 1.31 2022/01/22 11:49:18 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 1.31 2022/01/22 11:49:18 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 #if defined(__arm32__) /* XXX temporary */ 75 #define _OFBUS_ROOT_MACHDEP_SKIPNAMES \ 76 "udp", \ 77 "cpus", \ 78 "mmu", \ 79 "memory" 80 #endif /* __arm32__ */ 81 82 /* 83 * Skip some well-known nodes in the root that contain no useful 84 * child devices. 85 */ 86 static bool 87 ofbus_skip_node_in_root(int phandle, char *name, size_t namesize) 88 { 89 static const char * const skip_names[] = { 90 "aliases", 91 "options", 92 "openprom", 93 "chosen", 94 "packages", 95 #ifdef _OFBUS_ROOT_MACHDEP_SKIPNAMES 96 _OFBUS_ROOT_MACHDEP_SKIPNAMES 97 #endif 98 }; 99 u_int i; 100 101 name[0] = '\0'; 102 if (OF_getprop(phandle, "name", name, namesize) <= 0) { 103 return false; 104 } 105 106 for (i = 0; i < __arraycount(skip_names); i++) { 107 if (strcmp(name, skip_names[i]) == 0) { 108 return true; 109 } 110 } 111 return false; 112 } 113 114 void 115 ofbus_attach(device_t parent, device_t dev, void *aux) 116 { 117 struct ofbus_attach_args *oba = aux; 118 struct ofbus_attach_args oba2; 119 char name[64], type[64]; 120 int child, units; 121 bool rootbus; 122 123 rootbus = oba->oba_phandle == OF_finddevice("/"); 124 125 /* 126 * If we are the OFW root, get the banner-name and model 127 * properties and display them for informational purposes. 128 */ 129 if (rootbus) { 130 int model_len, banner_len; 131 132 model_len = OF_getprop(oba->oba_phandle, "model", 133 name, sizeof(name)); 134 banner_len = OF_getprop(oba->oba_phandle, "banner-name", 135 type, sizeof(type)); 136 137 if (banner_len > 0 && model_len > 0) { 138 printf(": %s (%s)\n", type, name); 139 } else if (model_len > 0) { 140 printf(": %s\n", name); 141 } else { 142 printf("\n"); 143 } 144 } else { 145 printf("\n"); 146 } 147 148 /* 149 * This is a hack to make the probe work on the scsi (and ide) bus. 150 * YES, I THINK IT IS A BUG IN THE OPENFIRMWARE TO NOT PROBE ALL 151 * DEVICES ON THESE BUSSES. 152 */ 153 units = 1; 154 name[0] = 0; 155 if (OF_getprop(oba->oba_phandle, "name", name, sizeof name) > 0) { 156 if (!strcmp(name, "scsi")) 157 units = 7; /* What about wide or hostid != 7? XXX */ 158 else if (!strcmp(name, "ide")) 159 units = 2; 160 } 161 162 devhandle_t selfh = device_handle(dev); 163 164 /* attach displays first */ 165 for (child = OF_child(oba->oba_phandle); child != 0; 166 child = OF_peer(child)) { 167 oba2.oba_busname = "ofw"; 168 type[0] = 0; 169 if (OF_getprop(child, "device_type", type, sizeof(type)) <= 0) 170 continue; 171 if (strncmp(type, "display", sizeof(type)) != 0) 172 continue; 173 of_packagename(child, name, sizeof name); 174 oba2.oba_phandle = child; 175 for (oba2.oba_unit = 0; oba2.oba_unit < units; 176 oba2.oba_unit++) { 177 if (units > 1) { 178 snprintf(oba2.oba_ofname, 179 sizeof(oba2.oba_ofname), "%s@%d", name, 180 oba2.oba_unit); 181 } else { 182 strlcpy(oba2.oba_ofname, name, 183 sizeof(oba2.oba_ofname)); 184 } 185 config_found(dev, &oba2, ofbus_print, 186 CFARGS(.devhandle = devhandle_from_of(selfh, 187 child))); 188 } 189 } 190 191 /* now the rest */ 192 for (child = OF_child(oba->oba_phandle); child != 0; 193 child = OF_peer(child)) { 194 oba2.oba_busname = "ofw"; 195 type[0] = 0; 196 if (OF_getprop(child, "device_type", type, sizeof(type)) > 0) { 197 if (strncmp(type, "display", sizeof(type)) == 0) 198 continue; 199 } 200 if (rootbus && 201 ofbus_skip_node_in_root(child, name, sizeof(name))) { 202 continue; 203 } 204 of_packagename(child, name, sizeof name); 205 oba2.oba_phandle = child; 206 for (oba2.oba_unit = 0; oba2.oba_unit < units; 207 oba2.oba_unit++) { 208 if (units > 1) { 209 snprintf(oba2.oba_ofname, 210 sizeof(oba2.oba_ofname), "%s@%d", name, 211 oba2.oba_unit); 212 } else { 213 strlcpy(oba2.oba_ofname, name, 214 sizeof(oba2.oba_ofname)); 215 } 216 config_found(dev, &oba2, ofbus_print, 217 CFARGS(.devhandle = devhandle_from_of(selfh, 218 child))); 219 } 220 } 221 } 222
Indexes created Thu Sep 25 02:09:54 GMT 2025