1 /* 2 * (C) Copyright 2007 3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <common.h> 25 #include <linux/ctype.h> 26 #include <linux/types.h> 27 #include <asm/global_data.h> 28 #include <fdt.h> 29 #include <libfdt.h> 30 #include <fdt_support.h> 31 #include <exports.h> 32 33 /* 34 * Global data (for the gd->bd) 35 */ 36 DECLARE_GLOBAL_DATA_PTR; 37 38 39 /** 40 * fdt_find_and_setprop: Find a node and set it's property 41 * 42 * @fdt: ptr to device tree 43 * @node: path of node 44 * @prop: property name 45 * @val: ptr to new value 46 * @len: length of new property value 47 * @create: flag to create the property if it doesn't exist 48 * 49 * Convenience function to directly set a property given the path to the node. 50 */ 51 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 52 const void *val, int len, int create) 53 { 54 int nodeoff = fdt_path_offset(fdt, node); 55 56 if (nodeoff < 0) 57 return nodeoff; 58 59 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL)) 60 return 0; /* create flag not set; so exit quietly */ 61 62 return fdt_setprop(fdt, nodeoff, prop, val, len); 63 } 64 65 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 66 static int fdt_fixup_stdout(void *fdt, int chosenoff) 67 { 68 int err = 0; 69 #ifdef CONFIG_CONS_INDEX 70 int node; 71 char sername[9] = { 0 }; 72 const char *path; 73 74 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 75 76 err = node = fdt_path_offset(fdt, "/aliases"); 77 if (node >= 0) { 78 int len; 79 path = fdt_getprop(fdt, node, sername, &len); 80 if (path) { 81 char *p = malloc(len); 82 err = -FDT_ERR_NOSPACE; 83 if (p) { 84 memcpy(p, path, len); 85 err = fdt_setprop(fdt, chosenoff, 86 "linux,stdout-path", p, len); 87 free(p); 88 } 89 } else { 90 err = len; 91 } 92 } 93 #endif 94 if (err < 0) 95 printf("WARNING: could not set linux,stdout-path %s.\n", 96 fdt_strerror(err)); 97 98 return err; 99 } 100 #endif 101 102 int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force) 103 { 104 int nodeoffset; 105 int err; 106 u32 tmp; /* used to set 32 bit integer properties */ 107 char *str; /* used to set string properties */ 108 const char *path; 109 110 err = fdt_check_header(fdt); 111 if (err < 0) { 112 printf("fdt_chosen: %s\n", fdt_strerror(err)); 113 return err; 114 } 115 116 if (initrd_start && initrd_end) { 117 uint64_t addr, size; 118 int total = fdt_num_mem_rsv(fdt); 119 int j; 120 121 /* 122 * Look for an existing entry and update it. If we don't find 123 * the entry, we will j be the next available slot. 124 */ 125 for (j = 0; j < total; j++) { 126 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 127 if (addr == initrd_start) { 128 fdt_del_mem_rsv(fdt, j); 129 break; 130 } 131 } 132 133 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start + 1); 134 if (err < 0) { 135 printf("fdt_chosen: %s\n", fdt_strerror(err)); 136 return err; 137 } 138 } 139 140 /* 141 * Find the "chosen" node. 142 */ 143 nodeoffset = fdt_path_offset (fdt, "/chosen"); 144 145 /* 146 * If there is no "chosen" node in the blob, create it. 147 */ 148 if (nodeoffset < 0) { 149 /* 150 * Create a new node "/chosen" (offset 0 is root level) 151 */ 152 nodeoffset = fdt_add_subnode(fdt, 0, "chosen"); 153 if (nodeoffset < 0) { 154 printf("WARNING: could not create /chosen %s.\n", 155 fdt_strerror(nodeoffset)); 156 return nodeoffset; 157 } 158 } 159 160 /* 161 * Create /chosen properites that don't exist in the fdt. 162 * If the property exists, update it only if the "force" parameter 163 * is true. 164 */ 165 str = getenv("bootargs"); 166 if (str != NULL) { 167 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL); 168 if ((path == NULL) || force) { 169 err = fdt_setprop(fdt, nodeoffset, 170 "bootargs", str, strlen(str)+1); 171 if (err < 0) 172 printf("WARNING: could not set bootargs %s.\n", 173 fdt_strerror(err)); 174 } 175 } 176 if (initrd_start && initrd_end) { 177 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL); 178 if ((path == NULL) || force) { 179 tmp = __cpu_to_be32(initrd_start); 180 err = fdt_setprop(fdt, nodeoffset, 181 "linux,initrd-start", &tmp, sizeof(tmp)); 182 if (err < 0) 183 printf("WARNING: " 184 "could not set linux,initrd-start %s.\n", 185 fdt_strerror(err)); 186 tmp = __cpu_to_be32(initrd_end); 187 err = fdt_setprop(fdt, nodeoffset, 188 "linux,initrd-end", &tmp, sizeof(tmp)); 189 if (err < 0) 190 printf("WARNING: could not set linux,initrd-end %s.\n", 191 fdt_strerror(err)); 192 } 193 } 194 195 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 196 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 197 if ((path == NULL) || force) 198 err = fdt_fixup_stdout(fdt, nodeoffset); 199 #endif 200 201 #ifdef OF_STDOUT_PATH 202 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 203 if ((path == NULL) || force) { 204 err = fdt_setprop(fdt, nodeoffset, 205 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1); 206 if (err < 0) 207 printf("WARNING: could not set linux,stdout-path %s.\n", 208 fdt_strerror(err)); 209 } 210 #endif 211 212 return err; 213 } 214 215 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 216 const void *val, int len, int create) 217 { 218 #if defined(DEBUG) 219 int i; 220 debug("Updating property '%s/%s' = ", path, prop); 221 for (i = 0; i < len; i++) 222 debug(" %.2x", *(u8*)(val+i)); 223 debug("\n"); 224 #endif 225 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 226 if (rc) 227 printf("Unable to update property %s:%s, err=%s\n", 228 path, prop, fdt_strerror(rc)); 229 } 230 231 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 232 u32 val, int create) 233 { 234 val = cpu_to_fdt32(val); 235 do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create); 236 } 237 238 void do_fixup_by_prop(void *fdt, 239 const char *pname, const void *pval, int plen, 240 const char *prop, const void *val, int len, 241 int create) 242 { 243 int off; 244 #if defined(DEBUG) 245 int i; 246 debug("Updating property '%s' = ", prop); 247 for (i = 0; i < len; i++) 248 debug(" %.2x", *(u8*)(val+i)); 249 debug("\n"); 250 #endif 251 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 252 while (off != -FDT_ERR_NOTFOUND) { 253 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL)) 254 fdt_setprop(fdt, off, prop, val, len); 255 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 256 } 257 } 258 259 void do_fixup_by_prop_u32(void *fdt, 260 const char *pname, const void *pval, int plen, 261 const char *prop, u32 val, int create) 262 { 263 val = cpu_to_fdt32(val); 264 do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create); 265 } 266 267 void do_fixup_by_compat(void *fdt, const char *compat, 268 const char *prop, const void *val, int len, int create) 269 { 270 int off = -1; 271 #if defined(DEBUG) 272 int i; 273 debug("Updating property '%s' = ", prop); 274 for (i = 0; i < len; i++) 275 debug(" %.2x", *(u8*)(val+i)); 276 debug("\n"); 277 #endif 278 off = fdt_node_offset_by_compatible(fdt, -1, compat); 279 while (off != -FDT_ERR_NOTFOUND) { 280 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL)) 281 fdt_setprop(fdt, off, prop, val, len); 282 off = fdt_node_offset_by_compatible(fdt, off, compat); 283 } 284 } 285 286 void do_fixup_by_compat_u32(void *fdt, const char *compat, 287 const char *prop, u32 val, int create) 288 { 289 val = cpu_to_fdt32(val); 290 do_fixup_by_compat(fdt, compat, prop, &val, 4, create); 291 } 292 293 int fdt_fixup_memory(void *blob, u64 start, u64 size) 294 { 295 int err, nodeoffset, len = 0; 296 u8 tmp[16]; 297 const u32 *addrcell, *sizecell; 298 299 err = fdt_check_header(blob); 300 if (err < 0) { 301 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 302 return err; 303 } 304 305 /* update, or add and update /memory node */ 306 nodeoffset = fdt_path_offset(blob, "/memory"); 307 if (nodeoffset < 0) { 308 nodeoffset = fdt_add_subnode(blob, 0, "memory"); 309 if (nodeoffset < 0) 310 printf("WARNING: could not create /memory: %s.\n", 311 fdt_strerror(nodeoffset)); 312 return nodeoffset; 313 } 314 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 315 sizeof("memory")); 316 if (err < 0) { 317 printf("WARNING: could not set %s %s.\n", "device_type", 318 fdt_strerror(err)); 319 return err; 320 } 321 322 addrcell = fdt_getprop(blob, 0, "#address-cells", NULL); 323 /* use shifts and mask to ensure endianness */ 324 if ((addrcell) && (*addrcell == 2)) { 325 tmp[0] = (start >> 56) & 0xff; 326 tmp[1] = (start >> 48) & 0xff; 327 tmp[2] = (start >> 40) & 0xff; 328 tmp[3] = (start >> 32) & 0xff; 329 tmp[4] = (start >> 24) & 0xff; 330 tmp[5] = (start >> 16) & 0xff; 331 tmp[6] = (start >> 8) & 0xff; 332 tmp[7] = (start ) & 0xff; 333 len = 8; 334 } else { 335 tmp[0] = (start >> 24) & 0xff; 336 tmp[1] = (start >> 16) & 0xff; 337 tmp[2] = (start >> 8) & 0xff; 338 tmp[3] = (start ) & 0xff; 339 len = 4; 340 } 341 342 sizecell = fdt_getprop(blob, 0, "#size-cells", NULL); 343 /* use shifts and mask to ensure endianness */ 344 if ((sizecell) && (*sizecell == 2)) { 345 tmp[0+len] = (size >> 56) & 0xff; 346 tmp[1+len] = (size >> 48) & 0xff; 347 tmp[2+len] = (size >> 40) & 0xff; 348 tmp[3+len] = (size >> 32) & 0xff; 349 tmp[4+len] = (size >> 24) & 0xff; 350 tmp[5+len] = (size >> 16) & 0xff; 351 tmp[6+len] = (size >> 8) & 0xff; 352 tmp[7+len] = (size ) & 0xff; 353 len += 8; 354 } else { 355 tmp[0+len] = (size >> 24) & 0xff; 356 tmp[1+len] = (size >> 16) & 0xff; 357 tmp[2+len] = (size >> 8) & 0xff; 358 tmp[3+len] = (size ) & 0xff; 359 len += 4; 360 } 361 362 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 363 if (err < 0) { 364 printf("WARNING: could not set %s %s.\n", 365 "reg", fdt_strerror(err)); 366 return err; 367 } 368 return 0; 369 } 370 371 #if defined(CONFIG_HAS_ETH0) || defined(CONFIG_HAS_ETH1) ||\ 372 defined(CONFIG_HAS_ETH2) || defined(CONFIG_HAS_ETH3) 373 374 void fdt_fixup_ethernet(void *fdt, bd_t *bd) 375 { 376 int node; 377 const char *path; 378 379 node = fdt_path_offset(fdt, "/aliases"); 380 if (node >= 0) { 381 #if defined(CONFIG_HAS_ETH0) 382 path = fdt_getprop(fdt, node, "ethernet0", NULL); 383 if (path) { 384 do_fixup_by_path(fdt, path, "mac-address", 385 bd->bi_enetaddr, 6, 0); 386 do_fixup_by_path(fdt, path, "local-mac-address", 387 bd->bi_enetaddr, 6, 1); 388 } 389 #endif 390 #if defined(CONFIG_HAS_ETH1) 391 path = fdt_getprop(fdt, node, "ethernet1", NULL); 392 if (path) { 393 do_fixup_by_path(fdt, path, "mac-address", 394 bd->bi_enet1addr, 6, 0); 395 do_fixup_by_path(fdt, path, "local-mac-address", 396 bd->bi_enet1addr, 6, 1); 397 } 398 #endif 399 #if defined(CONFIG_HAS_ETH2) 400 path = fdt_getprop(fdt, node, "ethernet2", NULL); 401 if (path) { 402 do_fixup_by_path(fdt, path, "mac-address", 403 bd->bi_enet2addr, 6, 0); 404 do_fixup_by_path(fdt, path, "local-mac-address", 405 bd->bi_enet2addr, 6, 1); 406 } 407 #endif 408 #if defined(CONFIG_HAS_ETH3) 409 path = fdt_getprop(fdt, node, "ethernet3", NULL); 410 if (path) { 411 do_fixup_by_path(fdt, path, "mac-address", 412 bd->bi_enet3addr, 6, 0); 413 do_fixup_by_path(fdt, path, "local-mac-address", 414 bd->bi_enet3addr, 6, 1); 415 } 416 #endif 417 } 418 } 419 #endif 420 421 #ifdef CONFIG_HAS_FSL_DR_USB 422 void fdt_fixup_dr_usb(void *blob, bd_t *bd) 423 { 424 char *mode; 425 const char *compat = "fsl-usb2-dr"; 426 const char *prop = "dr_mode"; 427 int node_offset; 428 int err; 429 430 mode = getenv("usb_dr_mode"); 431 if (!mode) 432 return; 433 434 node_offset = fdt_node_offset_by_compatible(blob, 0, compat); 435 if (node_offset < 0) 436 printf("WARNING: could not find compatible node %s: %s.\n", 437 compat, fdt_strerror(node_offset)); 438 439 err = fdt_setprop(blob, node_offset, prop, mode, strlen(mode) + 1); 440 if (err < 0) 441 printf("WARNING: could not set %s for %s: %s.\n", 442 prop, compat, fdt_strerror(err)); 443 } 444 #endif /* CONFIG_HAS_FSL_DR_USB */ 445