1 /*- 2 * Copyright (c) 2001 - 2003 by Thomas Moestl <tmm@FreeBSD.org>. 3 * Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions, and the following disclaimer, 11 * without modification, immediately at the beginning of the file. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_platform.h" 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/errno.h> 38 #include <sys/libkern.h> 39 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 #include <dev/ofw/openfirm.h> 43 44 #include "ofw_bus_if.h" 45 46 int 47 ofw_bus_gen_setup_devinfo(struct ofw_bus_devinfo *obd, phandle_t node) 48 { 49 50 if (obd == NULL) 51 return (ENOMEM); 52 /* The 'name' property is considered mandatory. */ 53 if ((OF_getprop_alloc(node, "name", 1, (void **)&obd->obd_name)) == -1) 54 return (EINVAL); 55 OF_getprop_alloc(node, "compatible", 1, (void **)&obd->obd_compat); 56 OF_getprop_alloc(node, "device_type", 1, (void **)&obd->obd_type); 57 OF_getprop_alloc(node, "model", 1, (void **)&obd->obd_model); 58 obd->obd_node = node; 59 return (0); 60 } 61 62 void 63 ofw_bus_gen_destroy_devinfo(struct ofw_bus_devinfo *obd) 64 { 65 66 if (obd == NULL) 67 return; 68 if (obd->obd_compat != NULL) 69 free(obd->obd_compat, M_OFWPROP); 70 if (obd->obd_model != NULL) 71 free(obd->obd_model, M_OFWPROP); 72 if (obd->obd_name != NULL) 73 free(obd->obd_name, M_OFWPROP); 74 if (obd->obd_type != NULL) 75 free(obd->obd_type, M_OFWPROP); 76 } 77 78 int 79 ofw_bus_gen_child_pnpinfo_str(device_t cbdev, device_t child, char *buf, 80 size_t buflen) 81 { 82 83 if (ofw_bus_get_name(child) != NULL) { 84 strlcat(buf, "name=", buflen); 85 strlcat(buf, ofw_bus_get_name(child), buflen); 86 } 87 88 if (ofw_bus_get_compat(child) != NULL) { 89 strlcat(buf, " compat=", buflen); 90 strlcat(buf, ofw_bus_get_compat(child), buflen); 91 } 92 return (0); 93 }; 94 95 const char * 96 ofw_bus_gen_get_compat(device_t bus, device_t dev) 97 { 98 const struct ofw_bus_devinfo *obd; 99 100 obd = OFW_BUS_GET_DEVINFO(bus, dev); 101 if (obd == NULL) 102 return (NULL); 103 return (obd->obd_compat); 104 } 105 106 const char * 107 ofw_bus_gen_get_model(device_t bus, device_t dev) 108 { 109 const struct ofw_bus_devinfo *obd; 110 111 obd = OFW_BUS_GET_DEVINFO(bus, dev); 112 if (obd == NULL) 113 return (NULL); 114 return (obd->obd_model); 115 } 116 117 const char * 118 ofw_bus_gen_get_name(device_t bus, device_t dev) 119 { 120 const struct ofw_bus_devinfo *obd; 121 122 obd = OFW_BUS_GET_DEVINFO(bus, dev); 123 if (obd == NULL) 124 return (NULL); 125 return (obd->obd_name); 126 } 127 128 phandle_t 129 ofw_bus_gen_get_node(device_t bus, device_t dev) 130 { 131 const struct ofw_bus_devinfo *obd; 132 133 obd = OFW_BUS_GET_DEVINFO(bus, dev); 134 if (obd == NULL) 135 return (0); 136 return (obd->obd_node); 137 } 138 139 const char * 140 ofw_bus_gen_get_type(device_t bus, device_t dev) 141 { 142 const struct ofw_bus_devinfo *obd; 143 144 obd = OFW_BUS_GET_DEVINFO(bus, dev); 145 if (obd == NULL) 146 return (NULL); 147 return (obd->obd_type); 148 } 149 150 int 151 ofw_bus_is_compatible(device_t dev, const char *onecompat) 152 { 153 phandle_t node; 154 const char *compat; 155 int len, onelen, l; 156 157 if ((compat = ofw_bus_get_compat(dev)) == NULL) 158 return (0); 159 160 if ((node = ofw_bus_get_node(dev)) == -1) 161 return (0); 162 163 /* Get total 'compatible' prop len */ 164 if ((len = OF_getproplen(node, "compatible")) <= 0) 165 return (0); 166 167 onelen = strlen(onecompat); 168 169 while (len > 0) { 170 if (strlen(compat) == onelen && 171 strncasecmp(compat, onecompat, onelen) == 0) 172 /* Found it. */ 173 return (1); 174 175 /* Slide to the next sub-string. */ 176 l = strlen(compat) + 1; 177 compat += l; 178 len -= l; 179 } 180 return (0); 181 } 182 183 int 184 ofw_bus_is_compatible_strict(device_t dev, const char *compatible) 185 { 186 const char *compat; 187 size_t len; 188 189 if ((compat = ofw_bus_get_compat(dev)) == NULL) 190 return (0); 191 192 len = strlen(compatible); 193 if (strlen(compat) == len && 194 strncasecmp(compat, compatible, len) == 0) 195 return (1); 196 197 return (0); 198 } 199 200 int 201 ofw_bus_has_prop(device_t dev, const char *propname) 202 { 203 phandle_t node; 204 205 if ((node = ofw_bus_get_node(dev)) == -1) 206 return (0); 207 208 return (OF_hasprop(node, propname)); 209 } 210 211 #ifndef FDT 212 void 213 ofw_bus_setup_iinfo(phandle_t node, struct ofw_bus_iinfo *ii, int intrsz) 214 { 215 pcell_t addrc; 216 int msksz; 217 218 if (OF_getprop(node, "#address-cells", &addrc, sizeof(addrc)) == -1) 219 addrc = 2; 220 ii->opi_addrc = addrc * sizeof(pcell_t); 221 222 ii->opi_imapsz = OF_getprop_alloc(node, "interrupt-map", 1, 223 (void **)&ii->opi_imap); 224 if (ii->opi_imapsz > 0) { 225 msksz = OF_getprop_alloc(node, "interrupt-map-mask", 1, 226 (void **)&ii->opi_imapmsk); 227 /* 228 * Failure to get the mask is ignored; a full mask is used 229 * then. We barf on bad mask sizes, however. 230 */ 231 if (msksz != -1 && msksz != ii->opi_addrc + intrsz) 232 panic("ofw_bus_setup_iinfo: bad interrupt-map-mask " 233 "property!"); 234 } 235 } 236 237 int 238 ofw_bus_lookup_imap(phandle_t node, struct ofw_bus_iinfo *ii, void *reg, 239 int regsz, void *pintr, int pintrsz, void *mintr, int mintrsz, 240 phandle_t *iparent, void *maskbuf) 241 { 242 int rv; 243 244 if (ii->opi_imapsz <= 0) 245 return (0); 246 KASSERT(regsz >= ii->opi_addrc, 247 ("ofw_bus_lookup_imap: register size too small: %d < %d", 248 regsz, ii->opi_addrc)); 249 rv = OF_getprop(node, "reg", reg, regsz); 250 if (rv < regsz) 251 panic("ofw_bus_lookup_imap: could not get reg property"); 252 return (ofw_bus_search_intrmap(pintr, pintrsz, reg, ii->opi_addrc, 253 ii->opi_imap, ii->opi_imapsz, ii->opi_imapmsk, maskbuf, mintr, 254 mintrsz, iparent)); 255 } 256 257 /* 258 * Map an interrupt using the firmware reg, interrupt-map and 259 * interrupt-map-mask properties. 260 * The interrupt property to be mapped must be of size intrsz, and pointed to 261 * by intr. The regs property of the node for which the mapping is done must 262 * be passed as regs. This property is an array of register specifications; 263 * the size of the address part of such a specification must be passed as 264 * physsz. Only the first element of the property is used. 265 * imap and imapsz hold the interrupt mask and it's size. 266 * imapmsk is a pointer to the interrupt-map-mask property, which must have 267 * a size of physsz + intrsz; it may be NULL, in which case a full mask is 268 * assumed. 269 * maskbuf must point to a buffer of length physsz + intrsz. 270 * The interrupt is returned in result, which must point to a buffer of length 271 * rintrsz (which gives the expected size of the mapped interrupt). 272 * Returns 1 if a mapping was found, 0 otherwise. 273 */ 274 int 275 ofw_bus_search_intrmap(void *intr, int intrsz, void *regs, int physsz, 276 void *imap, int imapsz, void *imapmsk, void *maskbuf, void *result, 277 int rintrsz, phandle_t *iparent) 278 { 279 phandle_t parent; 280 uint8_t *ref = maskbuf; 281 uint8_t *uiintr = intr; 282 uint8_t *uiregs = regs; 283 uint8_t *uiimapmsk = imapmsk; 284 uint8_t *mptr; 285 pcell_t pintrsz; 286 int i, rsz, tsz; 287 288 rsz = -1; 289 if (imapmsk != NULL) { 290 for (i = 0; i < physsz; i++) 291 ref[i] = uiregs[i] & uiimapmsk[i]; 292 for (i = 0; i < intrsz; i++) 293 ref[physsz + i] = uiintr[i] & uiimapmsk[physsz + i]; 294 } else { 295 bcopy(regs, ref, physsz); 296 bcopy(intr, ref + physsz, intrsz); 297 } 298 299 mptr = imap; 300 i = imapsz; 301 while (i > 0) { 302 bcopy(mptr + physsz + intrsz, &parent, sizeof(parent)); 303 if (OF_searchprop(parent, "#interrupt-cells", 304 &pintrsz, sizeof(pintrsz)) == -1) 305 pintrsz = 1; /* default */ 306 pintrsz *= sizeof(pcell_t); 307 308 /* Compute the map stride size. */ 309 tsz = physsz + intrsz + sizeof(phandle_t) + pintrsz; 310 KASSERT(i >= tsz, ("ofw_bus_search_intrmap: truncated map")); 311 312 /* 313 * XXX: Apple hardware uses a second cell to set information 314 * on the interrupt trigger type. This information should 315 * be used somewhere to program the PIC. 316 */ 317 318 if (bcmp(ref, mptr, physsz + intrsz) == 0) { 319 bcopy(mptr + physsz + intrsz + sizeof(parent), 320 result, rintrsz); 321 322 if (iparent != NULL) 323 *iparent = parent; 324 return (1); 325 } 326 mptr += tsz; 327 i -= tsz; 328 } 329 return (0); 330 } 331 #endif /* !FDT */ 332