ofw_bus_subr.c revision 208614
150477Speter/*- 238465Smsmith * Copyright (c) 2001 - 2003 by Thomas Moestl <tmm@FreeBSD.org>. 3163893Smarcel * Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org> 4114379Speter * All rights reserved. 540834Smsmith * 639178Smsmith * Redistribution and use in source and binary forms, with or without 7211678Simp * modification, are permitted provided that the following conditions 8136895Sru * are met: 9136895Sru * 1. Redistributions of source code must retain the above copyright 10219691Smarcel * notice, this list of conditions, and the following disclaimer, 11219691Smarcel * without modification, immediately at the beginning of the file. 12136895Sru * 2. Redistributions in binary form must reproduce the above copyright 13136895Sru * notice, this list of conditions and the following disclaimer in 14211817Snwhitehorn * the documentation and/or other materials provided with the 15134458Siedowse * distribution. 16211678Simp * 17209920Snwhitehorn * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18209920Snwhitehorn * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19219691Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20134458Siedowse * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21114379Speter * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22114379Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2368548Sbenno * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2468548Sbenno * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2568548Sbenno * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2668548Sbenno * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27163893Smarcel * SUCH DAMAGE. 28163893Smarcel */ 29163893Smarcel 30163893Smarcel#include <sys/cdefs.h> 31200460Smarcel__FBSDID("$FreeBSD: head/sys/dev/ofw/ofw_bus_subr.c 208614 2010-05-28 10:43:56Z raj $"); 32200460Smarcel 33200460Smarcel#include "opt_platform.h" 34200460Smarcel#include <sys/param.h> 35200460Smarcel#include <sys/systm.h> 3639178Smsmith#include <sys/bus.h> 37125561Sru#include <sys/errno.h> 3839178Smsmith#include <sys/libkern.h> 3939178Smsmith 40125561Sru#include <dev/ofw/ofw_bus.h> 4139178Smsmith#include <dev/ofw/ofw_bus_subr.h> 4239178Smsmith#include <dev/ofw/openfirm.h> 4340875Smsmith 4440875Smsmith#include "ofw_bus_if.h" 45125561Sru 4640875Smsmithint 4774850Sruofw_bus_gen_setup_devinfo(struct ofw_bus_devinfo *obd, phandle_t node) 4874850Sru{ 4940875Smsmith 5060704Sdcs if (obd == NULL) 51199210Sattilio return (ENOMEM); 52199210Sattilio /* The 'name' property is considered mandatory. */ 53199210Sattilio if ((OF_getprop_alloc(node, "name", 1, (void **)&obd->obd_name)) == -1) 54199210Sattilio return (EINVAL); 5574850Sru 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 62void 63ofw_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 78int 79ofw_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 95const char * 96ofw_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 106const char * 107ofw_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 117const char * 118ofw_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 128phandle_t 129ofw_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 139const char * 140ofw_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 150int 151ofw_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)) == 0) 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 (strncasecmp(compat, onecompat, onelen) == 0) 171 /* Found it. */ 172 return (1); 173 174 /* Slide to the next sub-string. */ 175 l = strlen(compat) + 1; 176 compat += l; 177 len -= l; 178 } 179 return (0); 180} 181 182int 183ofw_bus_is_compatible_strict(device_t dev, const char *compatible) 184{ 185 const char *compat; 186 187 if ((compat = ofw_bus_get_compat(dev)) == NULL) 188 return (0); 189 190 if (strncasecmp(compat, compatible, strlen(compatible)) == 0) 191 return (1); 192 193 return (0); 194} 195 196#ifndef FDT 197void 198ofw_bus_setup_iinfo(phandle_t node, struct ofw_bus_iinfo *ii, int intrsz) 199{ 200 pcell_t addrc; 201 int msksz; 202 203 if (OF_getprop(node, "#address-cells", &addrc, sizeof(addrc)) == -1) 204 addrc = 2; 205 ii->opi_addrc = addrc * sizeof(pcell_t); 206 207 ii->opi_imapsz = OF_getprop_alloc(node, "interrupt-map", 1, 208 (void **)&ii->opi_imap); 209 if (ii->opi_imapsz > 0) { 210 msksz = OF_getprop_alloc(node, "interrupt-map-mask", 1, 211 (void **)&ii->opi_imapmsk); 212 /* 213 * Failure to get the mask is ignored; a full mask is used 214 * then. We barf on bad mask sizes, however. 215 */ 216 if (msksz != -1 && msksz != ii->opi_addrc + intrsz) 217 panic("ofw_bus_setup_iinfo: bad interrupt-map-mask " 218 "property!"); 219 } 220} 221 222int 223ofw_bus_lookup_imap(phandle_t node, struct ofw_bus_iinfo *ii, void *reg, 224 int regsz, void *pintr, int pintrsz, void *mintr, int mintrsz, 225 void *maskbuf) 226{ 227 int rv; 228 229 if (ii->opi_imapsz <= 0) 230 return (0); 231 KASSERT(regsz >= ii->opi_addrc, 232 ("ofw_bus_lookup_imap: register size too small: %d < %d", 233 regsz, ii->opi_addrc)); 234 rv = OF_getprop(node, "reg", reg, regsz); 235 if (rv < regsz) 236 panic("ofw_bus_lookup_imap: could not get reg property"); 237 return (ofw_bus_search_intrmap(pintr, pintrsz, reg, ii->opi_addrc, 238 ii->opi_imap, ii->opi_imapsz, ii->opi_imapmsk, maskbuf, mintr, 239 mintrsz)); 240} 241 242/* 243 * Map an interrupt using the firmware reg, interrupt-map and 244 * interrupt-map-mask properties. 245 * The interrupt property to be mapped must be of size intrsz, and pointed to 246 * by intr. The regs property of the node for which the mapping is done must 247 * be passed as regs. This property is an array of register specifications; 248 * the size of the address part of such a specification must be passed as 249 * physsz. Only the first element of the property is used. 250 * imap and imapsz hold the interrupt mask and it's size. 251 * imapmsk is a pointer to the interrupt-map-mask property, which must have 252 * a size of physsz + intrsz; it may be NULL, in which case a full mask is 253 * assumed. 254 * maskbuf must point to a buffer of length physsz + intrsz. 255 * The interrupt is returned in result, which must point to a buffer of length 256 * rintrsz (which gives the expected size of the mapped interrupt). 257 * Returns 1 if a mapping was found, 0 otherwise. 258 */ 259int 260ofw_bus_search_intrmap(void *intr, int intrsz, void *regs, int physsz, 261 void *imap, int imapsz, void *imapmsk, void *maskbuf, void *result, 262 int rintrsz) 263{ 264 phandle_t parent; 265 uint8_t *ref = maskbuf; 266 uint8_t *uiintr = intr; 267 uint8_t *uiregs = regs; 268 uint8_t *uiimapmsk = imapmsk; 269 uint8_t *mptr; 270 pcell_t pintrsz; 271 int i, rsz, tsz; 272 273 rsz = -1; 274 if (imapmsk != NULL) { 275 for (i = 0; i < physsz; i++) 276 ref[i] = uiregs[i] & uiimapmsk[i]; 277 for (i = 0; i < intrsz; i++) 278 ref[physsz + i] = uiintr[i] & uiimapmsk[physsz + i]; 279 } else { 280 bcopy(regs, ref, physsz); 281 bcopy(intr, ref + physsz, intrsz); 282 } 283 284 mptr = imap; 285 i = imapsz; 286 while (i > 0) { 287 bcopy(mptr + physsz + intrsz, &parent, sizeof(parent)); 288 if (OF_searchprop(parent, "#interrupt-cells", 289 &pintrsz, sizeof(pintrsz)) == -1) 290 pintrsz = 1; /* default */ 291 pintrsz *= sizeof(pcell_t); 292 293 /* Compute the map stride size. */ 294 tsz = physsz + intrsz + sizeof(phandle_t) + pintrsz; 295 KASSERT(i >= tsz, ("ofw_bus_search_intrmap: truncated map")); 296 297 /* 298 * XXX: Apple hardware uses a second cell to set information 299 * on the interrupt trigger type. This information should 300 * be used somewhere to program the PIC. 301 */ 302 303 if (bcmp(ref, mptr, physsz + intrsz) == 0) { 304 bcopy(mptr + physsz + intrsz + sizeof(parent), 305 result, rintrsz); 306 return (1); 307 } 308 mptr += tsz; 309 i -= tsz; 310 } 311 return (0); 312} 313#endif /* !FDT */ 314