1 /* 2 * (C) Copyright 2007 3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com 4 * 5 * Copyright 2010-2011 Freescale Semiconductor, Inc. 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <abuf.h> 12 #include <android_image.h> 13 #include <exports.h> 14 #include <fdt_support.h> 15 #include <fdtdec.h> 16 #include <inttypes.h> 17 #include <malloc.h> 18 #ifdef CONFIG_MTD_BLK 19 #include <mtd_blk.h> 20 #endif 21 #include <stdio_dev.h> 22 #include <asm/arch/hotkey.h> 23 #include <asm/global_data.h> 24 #include <linux/ctype.h> 25 #include <linux/libfdt.h> 26 #include <linux/types.h> 27 28 DECLARE_GLOBAL_DATA_PTR; 29 30 /** 31 * fdt_getprop_u32_default_node - Return a node's property or a default 32 * 33 * @fdt: ptr to device tree 34 * @off: offset of node 35 * @cell: cell offset in property 36 * @prop: property name 37 * @dflt: default value if the property isn't found 38 * 39 * Convenience function to return a node's property or a default value if 40 * the property doesn't exist. 41 */ 42 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, 43 const char *prop, const u32 dflt) 44 { 45 const fdt32_t *val; 46 int len; 47 48 val = fdt_getprop(fdt, off, prop, &len); 49 50 /* Check if property exists */ 51 if (!val) 52 return dflt; 53 54 /* Check if property is long enough */ 55 if (len < ((cell + 1) * sizeof(uint32_t))) 56 return dflt; 57 58 return fdt32_to_cpu(*val); 59 } 60 61 /** 62 * fdt_getprop_u32_default - Find a node and return it's property or a default 63 * 64 * @fdt: ptr to device tree 65 * @path: path of node 66 * @prop: property name 67 * @dflt: default value if the property isn't found 68 * 69 * Convenience function to find a node and return it's property or a 70 * default value if it doesn't exist. 71 */ 72 u32 fdt_getprop_u32_default(const void *fdt, const char *path, 73 const char *prop, const u32 dflt) 74 { 75 int off; 76 77 off = fdt_path_offset(fdt, path); 78 if (off < 0) 79 return dflt; 80 81 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); 82 } 83 84 /** 85 * fdt_find_and_setprop: Find a node and set it's property 86 * 87 * @fdt: ptr to device tree 88 * @node: path of node 89 * @prop: property name 90 * @val: ptr to new value 91 * @len: length of new property value 92 * @create: flag to create the property if it doesn't exist 93 * 94 * Convenience function to directly set a property given the path to the node. 95 */ 96 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 97 const void *val, int len, int create) 98 { 99 int nodeoff = fdt_path_offset(fdt, node); 100 101 if (nodeoff < 0) 102 return nodeoff; 103 104 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) 105 return 0; /* create flag not set; so exit quietly */ 106 107 return fdt_setprop(fdt, nodeoff, prop, val, len); 108 } 109 110 /** 111 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node 112 * 113 * @fdt: pointer to the device tree blob 114 * @parentoffset: structure block offset of a node 115 * @name: name of the subnode to locate 116 * 117 * fdt_subnode_offset() finds a subnode of the node with a given name. 118 * If the subnode does not exist, it will be created. 119 */ 120 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) 121 { 122 int offset; 123 124 offset = fdt_subnode_offset(fdt, parentoffset, name); 125 126 if (offset == -FDT_ERR_NOTFOUND) 127 offset = fdt_add_subnode(fdt, parentoffset, name); 128 129 if (offset < 0) 130 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset)); 131 132 return offset; 133 } 134 135 /* rename to CONFIG_OF_STDOUT_PATH ? */ 136 #if defined(OF_STDOUT_PATH) 137 static int fdt_fixup_stdout(void *fdt, int chosenoff) 138 { 139 return fdt_setprop(fdt, chosenoff, "linux,stdout-path", 140 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); 141 } 142 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) 143 static int fdt_fixup_stdout(void *fdt, int chosenoff) 144 { 145 int err; 146 int aliasoff; 147 char sername[9] = { 0 }; 148 const void *path; 149 int len; 150 char tmp[256]; /* long enough */ 151 152 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 153 154 aliasoff = fdt_path_offset(fdt, "/aliases"); 155 if (aliasoff < 0) { 156 err = aliasoff; 157 goto noalias; 158 } 159 160 path = fdt_getprop(fdt, aliasoff, sername, &len); 161 if (!path) { 162 err = len; 163 goto noalias; 164 } 165 166 /* fdt_setprop may break "path" so we copy it to tmp buffer */ 167 memcpy(tmp, path, len); 168 169 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); 170 if (err < 0) 171 printf("WARNING: could not set linux,stdout-path %s.\n", 172 fdt_strerror(err)); 173 174 return err; 175 176 noalias: 177 printf("WARNING: %s: could not read %s alias: %s\n", 178 __func__, sername, fdt_strerror(err)); 179 180 return 0; 181 } 182 #else 183 static int fdt_fixup_stdout(void *fdt, int chosenoff) 184 { 185 return 0; 186 } 187 #endif 188 189 int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, 190 uint64_t val, int is_u64) 191 { 192 if (is_u64) 193 return fdt_setprop_u64(fdt, nodeoffset, name, val); 194 else 195 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); 196 } 197 198 int fdt_root(void *fdt) 199 { 200 char *serial; 201 int err; 202 203 err = fdt_check_header(fdt); 204 if (err < 0) { 205 printf("fdt_root: %s\n", fdt_strerror(err)); 206 return err; 207 } 208 209 serial = env_get("serial#"); 210 if (serial) { 211 err = fdt_setprop(fdt, 0, "serial-number", serial, 212 strlen(serial) + 1); 213 214 if (err < 0) { 215 printf("WARNING: could not set serial-number %s.\n", 216 fdt_strerror(err)); 217 return err; 218 } 219 } 220 221 return 0; 222 } 223 224 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) 225 { 226 int nodeoffset; 227 int err, j, total; 228 int is_u64; 229 uint64_t addr, size; 230 231 /* just return if the size of initrd is zero */ 232 if (initrd_start == initrd_end) 233 return 0; 234 235 /* find or create "/chosen" node. */ 236 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 237 if (nodeoffset < 0) 238 return nodeoffset; 239 240 total = fdt_num_mem_rsv(fdt); 241 242 /* 243 * Look for an existing entry and update it. If we don't find 244 * the entry, we will j be the next available slot. 245 */ 246 for (j = 0; j < total; j++) { 247 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 248 if (addr == initrd_start) { 249 fdt_del_mem_rsv(fdt, j); 250 break; 251 } 252 } 253 254 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 255 if (err < 0) { 256 printf("fdt_initrd: %s\n", fdt_strerror(err)); 257 return err; 258 } 259 260 is_u64 = (fdt_address_cells(fdt, 0) == 2); 261 262 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", 263 (uint64_t)initrd_start, is_u64); 264 265 if (err < 0) { 266 printf("WARNING: could not set linux,initrd-start %s.\n", 267 fdt_strerror(err)); 268 return err; 269 } 270 271 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", 272 (uint64_t)initrd_end, is_u64); 273 274 if (err < 0) { 275 printf("WARNING: could not set linux,initrd-end %s.\n", 276 fdt_strerror(err)); 277 278 return err; 279 } 280 281 return 0; 282 } 283 284 int fdt_bootargs_append(void *fdt, char *data) 285 { 286 const char *arr_bootargs[] = { "bootargs", "bootargs_ext" }; 287 int nodeoffset, len; 288 const char *bootargs; 289 char *str; 290 int i, ret = 0; 291 292 if (!data) 293 return 0; 294 295 /* find or create "/chosen" node. */ 296 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 297 if (nodeoffset < 0) 298 return nodeoffset; 299 300 for (i = 0; i < ARRAY_SIZE(arr_bootargs); i++) { 301 bootargs = fdt_getprop(fdt, nodeoffset, 302 arr_bootargs[i], NULL); 303 if (bootargs) { 304 len = strlen(bootargs) + strlen(data) + 2; 305 str = malloc(len); 306 if (!str) 307 return -ENOMEM; 308 309 fdt_increase_size(fdt, 512); 310 snprintf(str, len, "%s %s", bootargs, data); 311 ret = fdt_setprop(fdt, nodeoffset, arr_bootargs[i], 312 str, len); 313 if (ret < 0) 314 printf("WARNING: could not set bootargs %s.\n", fdt_strerror(ret)); 315 316 free(str); 317 break; 318 } 319 } 320 321 return ret; 322 } 323 324 int fdt_bootargs_append_ab(void *fdt, char *slot) 325 { 326 char *str; 327 int len, ret = 0; 328 329 if (!slot) 330 return 0; 331 332 len = strlen(ANDROID_ARG_SLOT_SUFFIX) + strlen(slot) + 1; 333 str = malloc(len); 334 if (!str) 335 return -ENOMEM; 336 337 snprintf(str, len, "%s%s", ANDROID_ARG_SLOT_SUFFIX, slot); 338 ret = fdt_bootargs_append(fdt, str); 339 if (ret) 340 printf("Apend slot info to bootargs fail"); 341 342 free(str); 343 344 return ret; 345 } 346 347 /** 348 * board_fdt_chosen_bootargs - boards may override this function to use 349 * alternative kernel command line arguments 350 */ 351 __weak char *board_fdt_chosen_bootargs(void *fdt) 352 { 353 return env_get("bootargs"); 354 } 355 356 int fdt_chosen(void *fdt) 357 { 358 struct abuf buf = {}; 359 int nodeoffset; 360 int err; 361 char *str; /* used to set string properties */ 362 363 err = fdt_check_header(fdt); 364 if (err < 0) { 365 printf("fdt_chosen: %s\n", fdt_strerror(err)); 366 return err; 367 } 368 369 /* find or create "/chosen" node. */ 370 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 371 if (nodeoffset < 0) 372 return nodeoffset; 373 374 if (IS_ENABLED(CONFIG_BOARD_RNG_SEED) && !board_rng_seed(&buf)) { 375 err = fdt_setprop(fdt, nodeoffset, "rng-seed", 376 abuf_data(&buf), abuf_size(&buf)); 377 abuf_uninit(&buf); 378 if (err < 0) { 379 printf("WARNING: could not set rng-seed %s.\n", 380 fdt_strerror(err)); 381 return err; 382 } 383 } 384 385 str = board_fdt_chosen_bootargs(fdt); 386 if (str) { 387 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 388 strlen(str) + 1); 389 if (err < 0) { 390 printf("WARNING: could not set bootargs %s.\n", 391 fdt_strerror(err)); 392 return err; 393 } 394 } 395 396 return fdt_fixup_stdout(fdt, nodeoffset); 397 } 398 399 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 400 const void *val, int len, int create) 401 { 402 #if defined(DEBUG) 403 int i; 404 debug("Updating property '%s/%s' = ", path, prop); 405 for (i = 0; i < len; i++) 406 debug(" %.2x", *(u8*)(val+i)); 407 debug("\n"); 408 #endif 409 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 410 if (rc) 411 printf("Unable to update property %s:%s, err=%s\n", 412 path, prop, fdt_strerror(rc)); 413 } 414 415 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 416 u32 val, int create) 417 { 418 fdt32_t tmp = cpu_to_fdt32(val); 419 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 420 } 421 422 void do_fixup_by_prop(void *fdt, 423 const char *pname, const void *pval, int plen, 424 const char *prop, const void *val, int len, 425 int create) 426 { 427 int off; 428 #if defined(DEBUG) 429 int i; 430 debug("Updating property '%s' = ", prop); 431 for (i = 0; i < len; i++) 432 debug(" %.2x", *(u8*)(val+i)); 433 debug("\n"); 434 #endif 435 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 436 while (off != -FDT_ERR_NOTFOUND) { 437 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 438 fdt_setprop(fdt, off, prop, val, len); 439 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 440 } 441 } 442 443 void do_fixup_by_prop_u32(void *fdt, 444 const char *pname, const void *pval, int plen, 445 const char *prop, u32 val, int create) 446 { 447 fdt32_t tmp = cpu_to_fdt32(val); 448 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 449 } 450 451 void do_fixup_by_compat(void *fdt, const char *compat, 452 const char *prop, const void *val, int len, int create) 453 { 454 int off = -1; 455 #if defined(DEBUG) 456 int i; 457 debug("Updating property '%s' = ", prop); 458 for (i = 0; i < len; i++) 459 debug(" %.2x", *(u8*)(val+i)); 460 debug("\n"); 461 #endif 462 off = fdt_node_offset_by_compatible(fdt, -1, compat); 463 while (off != -FDT_ERR_NOTFOUND) { 464 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 465 fdt_setprop(fdt, off, prop, val, len); 466 off = fdt_node_offset_by_compatible(fdt, off, compat); 467 } 468 } 469 470 void do_fixup_by_compat_u32(void *fdt, const char *compat, 471 const char *prop, u32 val, int create) 472 { 473 fdt32_t tmp = cpu_to_fdt32(val); 474 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 475 } 476 477 /* 478 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 479 */ 480 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 481 int n) 482 { 483 int i; 484 int address_cells = fdt_address_cells(fdt, 0); 485 int size_cells = fdt_size_cells(fdt, 0); 486 char *p = buf; 487 488 for (i = 0; i < n; i++) { 489 if (address_cells == 2) 490 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 491 else 492 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 493 p += 4 * address_cells; 494 495 if (size_cells == 2) 496 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 497 else 498 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 499 p += 4 * size_cells; 500 } 501 502 return p - (char *)buf; 503 } 504 505 int fdt_record_loadable(void *blob, u32 index, const char *name, 506 uintptr_t load_addr, u32 size, uintptr_t entry_point, 507 const char *type, const char *os) 508 { 509 int err, node; 510 511 err = fdt_check_header(blob); 512 if (err < 0) { 513 printf("%s: %s\n", __func__, fdt_strerror(err)); 514 return err; 515 } 516 517 /* find or create "/fit-images" node */ 518 node = fdt_find_or_add_subnode(blob, 0, "fit-images"); 519 if (node < 0) 520 return node; 521 522 /* find or create "/fit-images/<name>" node */ 523 node = fdt_find_or_add_subnode(blob, node, name); 524 if (node < 0) 525 return node; 526 527 /* 528 * We record these as 32bit entities, possibly truncating addresses. 529 * However, spl_fit.c is not 64bit safe either: i.e. we should not 530 * have an issue here. 531 */ 532 fdt_setprop_u32(blob, node, "load-addr", load_addr); 533 if (entry_point != -1) 534 fdt_setprop_u32(blob, node, "entry-point", entry_point); 535 fdt_setprop_u32(blob, node, "size", size); 536 if (type) 537 fdt_setprop_string(blob, node, "type", type); 538 if (os) 539 fdt_setprop_string(blob, node, "os", os); 540 541 return node; 542 } 543 544 #ifdef CONFIG_NR_DRAM_BANKS 545 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 546 #else 547 #define MEMORY_BANKS_MAX 4 548 #endif 549 550 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY 551 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 552 { 553 int err, nodeoffset; 554 int len; 555 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 556 557 if (banks > MEMORY_BANKS_MAX) { 558 printf("%s: num banks %d exceeds hardcoded limit %d." 559 " Recompile with higher MEMORY_BANKS_MAX?\n", 560 __FUNCTION__, banks, MEMORY_BANKS_MAX); 561 return -1; 562 } 563 564 err = fdt_check_header(blob); 565 if (err < 0) { 566 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 567 return err; 568 } 569 570 /* find or create "/memory" node. */ 571 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 572 if (nodeoffset < 0) 573 return nodeoffset; 574 575 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 576 sizeof("memory")); 577 if (err < 0) { 578 printf("WARNING: could not set %s %s.\n", "device_type", 579 fdt_strerror(err)); 580 return err; 581 } 582 583 if (!banks) 584 return 0; 585 586 len = fdt_pack_reg(blob, tmp, start, size, banks); 587 588 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 589 if (err < 0) { 590 printf("WARNING: could not set %s %s.\n", 591 "reg", fdt_strerror(err)); 592 return err; 593 } 594 return 0; 595 } 596 #else 597 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 598 { 599 struct fdt_resource res; 600 int i, nodeoffset; 601 602 /* show memory */ 603 nodeoffset = fdt_subnode_offset(blob, 0, "memory"); 604 if (nodeoffset > 0) { 605 for (i = 0; i < MEMORY_BANKS_MAX; i++) { 606 if (fdt_get_resource(blob, nodeoffset, "reg", i, &res)) 607 break; 608 res.end += 1; 609 if (!res.start && !res.end) 610 break; 611 printf("fixed bank: 0x%08llx - 0x%08llx (size: 0x%08llx)\n", 612 (u64)res.start, (u64)res.end, (u64)res.end - (u64)res.start); 613 } 614 } 615 616 return 0; 617 } 618 619 #endif 620 621 int fdt_fixup_memory(void *blob, u64 start, u64 size) 622 { 623 return fdt_fixup_memory_banks(blob, &start, &size, 1); 624 } 625 626 int fdt_update_reserved_memory(void *blob, char *name, u64 start, u64 size) 627 { 628 int nodeoffset, len, err; 629 u8 tmp[16]; /* Up to 64-bit address + 64-bit size */ 630 631 nodeoffset = fdt_node_offset_by_compatible(blob, 0, name); 632 if (nodeoffset < 0) 633 debug("Can't find nodeoffset: %d\n", nodeoffset); 634 635 if (!size) 636 return nodeoffset; 637 638 len = fdt_pack_reg(blob, tmp, &start, &size, 1); 639 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 640 if (err < 0) { 641 printf("WARNING: could not set %s %s.\n", 642 "reg", fdt_strerror(err)); 643 return err; 644 } 645 646 return nodeoffset; 647 } 648 649 void fdt_fixup_ethernet(void *fdt) 650 { 651 int i = 0, j, prop; 652 char *tmp, *end; 653 char mac[16]; 654 const char *path; 655 unsigned char mac_addr[ARP_HLEN]; 656 int offset; 657 #ifdef FDT_SEQ_MACADDR_FROM_ENV 658 int nodeoff; 659 const struct fdt_property *fdt_prop; 660 #endif 661 662 if (fdt_path_offset(fdt, "/aliases") < 0) 663 return; 664 665 /* Cycle through all aliases */ 666 for (prop = 0; ; prop++) { 667 const char *name; 668 669 /* FDT might have been edited, recompute the offset */ 670 offset = fdt_first_property_offset(fdt, 671 fdt_path_offset(fdt, "/aliases")); 672 /* Select property number 'prop' */ 673 for (j = 0; j < prop; j++) 674 offset = fdt_next_property_offset(fdt, offset); 675 676 if (offset < 0) 677 break; 678 679 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 680 if (!strncmp(name, "ethernet", 8)) { 681 /* Treat plain "ethernet" same as "ethernet0". */ 682 if (!strcmp(name, "ethernet") 683 #ifdef FDT_SEQ_MACADDR_FROM_ENV 684 || !strcmp(name, "ethernet0") 685 #endif 686 ) 687 i = 0; 688 #ifndef FDT_SEQ_MACADDR_FROM_ENV 689 else 690 i = trailing_strtol(name); 691 #endif 692 if (i != -1) { 693 if (i == 0) 694 strcpy(mac, "ethaddr"); 695 else 696 sprintf(mac, "eth%daddr", i); 697 } else { 698 continue; 699 } 700 #ifdef FDT_SEQ_MACADDR_FROM_ENV 701 nodeoff = fdt_path_offset(fdt, path); 702 fdt_prop = fdt_get_property(fdt, nodeoff, "status", 703 NULL); 704 if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) 705 continue; 706 i++; 707 #endif 708 tmp = env_get(mac); 709 if (!tmp) 710 continue; 711 712 for (j = 0; j < 6; j++) { 713 mac_addr[j] = tmp ? 714 simple_strtoul(tmp, &end, 16) : 0; 715 if (tmp) 716 tmp = (*end) ? end + 1 : end; 717 } 718 719 do_fixup_by_path(fdt, path, "mac-address", 720 &mac_addr, 6, 0); 721 do_fixup_by_path(fdt, path, "local-mac-address", 722 &mac_addr, 6, 1); 723 } 724 } 725 } 726 727 /* Resize the fdt to its actual size + a bit of padding */ 728 int fdt_shrink_to_minimum(void *blob, uint extrasize) 729 { 730 int i; 731 uint64_t addr, size; 732 int total, ret; 733 uint actualsize; 734 735 if (!blob) 736 return 0; 737 738 total = fdt_num_mem_rsv(blob); 739 for (i = 0; i < total; i++) { 740 fdt_get_mem_rsv(blob, i, &addr, &size); 741 if (addr == (uintptr_t)blob) { 742 fdt_del_mem_rsv(blob, i); 743 break; 744 } 745 } 746 747 /* 748 * Calculate the actual size of the fdt 749 * plus the size needed for 5 fdt_add_mem_rsv, one 750 * for the fdt itself and 4 for a possible initrd 751 * ((initrd-start + initrd-end) * 2 (name & value)) 752 */ 753 actualsize = fdt_off_dt_strings(blob) + 754 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 755 756 actualsize += extrasize; 757 /* Make it so the fdt ends on a page boundary */ 758 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 759 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 760 761 /* Change the fdt header to reflect the correct size */ 762 fdt_set_totalsize(blob, actualsize); 763 764 /* Add the new reservation */ 765 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 766 if (ret < 0) 767 return ret; 768 769 return actualsize; 770 } 771 772 #ifdef CONFIG_PCI 773 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 774 775 #define FDT_PCI_PREFETCH (0x40000000) 776 #define FDT_PCI_MEM32 (0x02000000) 777 #define FDT_PCI_IO (0x01000000) 778 #define FDT_PCI_MEM64 (0x03000000) 779 780 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 781 782 int addrcell, sizecell, len, r; 783 u32 *dma_range; 784 /* sized based on pci addr cells, size-cells, & address-cells */ 785 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 786 787 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 788 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 789 790 dma_range = &dma_ranges[0]; 791 for (r = 0; r < hose->region_count; r++) { 792 u64 bus_start, phys_start, size; 793 794 /* skip if !PCI_REGION_SYS_MEMORY */ 795 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 796 continue; 797 798 bus_start = (u64)hose->regions[r].bus_start; 799 phys_start = (u64)hose->regions[r].phys_start; 800 size = (u64)hose->regions[r].size; 801 802 dma_range[0] = 0; 803 if (size >= 0x100000000ull) 804 dma_range[0] |= FDT_PCI_MEM64; 805 else 806 dma_range[0] |= FDT_PCI_MEM32; 807 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 808 dma_range[0] |= FDT_PCI_PREFETCH; 809 #ifdef CONFIG_SYS_PCI_64BIT 810 dma_range[1] = bus_start >> 32; 811 #else 812 dma_range[1] = 0; 813 #endif 814 dma_range[2] = bus_start & 0xffffffff; 815 816 if (addrcell == 2) { 817 dma_range[3] = phys_start >> 32; 818 dma_range[4] = phys_start & 0xffffffff; 819 } else { 820 dma_range[3] = phys_start & 0xffffffff; 821 } 822 823 if (sizecell == 2) { 824 dma_range[3 + addrcell + 0] = size >> 32; 825 dma_range[3 + addrcell + 1] = size & 0xffffffff; 826 } else { 827 dma_range[3 + addrcell + 0] = size & 0xffffffff; 828 } 829 830 dma_range += (3 + addrcell + sizecell); 831 } 832 833 len = dma_range - &dma_ranges[0]; 834 if (len) 835 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 836 837 return 0; 838 } 839 #endif 840 841 int fdt_increase_size(void *fdt, int add_len) 842 { 843 int newlen; 844 845 newlen = fdt_totalsize(fdt) + add_len; 846 847 /* Open in place with a new len */ 848 return fdt_open_into(fdt, fdt, newlen); 849 } 850 851 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 852 #include <jffs2/load_kernel.h> 853 #include <mtd_node.h> 854 855 struct reg_cell { 856 unsigned int r0; 857 unsigned int r1; 858 }; 859 860 int fdt_del_subnodes(const void *blob, int parent_offset) 861 { 862 int off, ndepth; 863 int ret; 864 865 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 866 (off >= 0) && (ndepth > 0); 867 off = fdt_next_node(blob, off, &ndepth)) { 868 if (ndepth == 1) { 869 debug("delete %s: offset: %x\n", 870 fdt_get_name(blob, off, 0), off); 871 ret = fdt_del_node((void *)blob, off); 872 if (ret < 0) { 873 printf("Can't delete node: %s\n", 874 fdt_strerror(ret)); 875 return ret; 876 } else { 877 ndepth = 0; 878 off = parent_offset; 879 } 880 } 881 } 882 return 0; 883 } 884 885 int fdt_del_partitions(void *blob, int parent_offset) 886 { 887 const void *prop; 888 int ndepth = 0; 889 int off; 890 int ret; 891 892 off = fdt_next_node(blob, parent_offset, &ndepth); 893 if (off > 0 && ndepth == 1) { 894 prop = fdt_getprop(blob, off, "label", NULL); 895 if (prop == NULL) { 896 /* 897 * Could not find label property, nand {}; node? 898 * Check subnode, delete partitions there if any. 899 */ 900 return fdt_del_partitions(blob, off); 901 } else { 902 ret = fdt_del_subnodes(blob, parent_offset); 903 if (ret < 0) { 904 printf("Can't remove subnodes: %s\n", 905 fdt_strerror(ret)); 906 return ret; 907 } 908 } 909 } 910 return 0; 911 } 912 913 int fdt_node_set_part_info(void *blob, int parent_offset, 914 struct mtd_device *dev) 915 { 916 struct list_head *pentry; 917 struct part_info *part; 918 struct reg_cell cell; 919 int off, ndepth = 0; 920 int part_num, ret; 921 char buf[64]; 922 923 ret = fdt_del_partitions(blob, parent_offset); 924 if (ret < 0) 925 return ret; 926 927 /* 928 * Check if it is nand {}; subnode, adjust 929 * the offset in this case 930 */ 931 off = fdt_next_node(blob, parent_offset, &ndepth); 932 if (off > 0 && ndepth == 1) 933 parent_offset = off; 934 935 part_num = 0; 936 list_for_each_prev(pentry, &dev->parts) { 937 int newoff; 938 939 part = list_entry(pentry, struct part_info, link); 940 941 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 942 part_num, part->name, part->size, 943 part->offset, part->mask_flags); 944 945 sprintf(buf, "partition@%llx", part->offset); 946 add_sub: 947 ret = fdt_add_subnode(blob, parent_offset, buf); 948 if (ret == -FDT_ERR_NOSPACE) { 949 ret = fdt_increase_size(blob, 512); 950 if (!ret) 951 goto add_sub; 952 else 953 goto err_size; 954 } else if (ret < 0) { 955 printf("Can't add partition node: %s\n", 956 fdt_strerror(ret)); 957 return ret; 958 } 959 newoff = ret; 960 961 /* Check MTD_WRITEABLE_CMD flag */ 962 if (part->mask_flags & 1) { 963 add_ro: 964 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 965 if (ret == -FDT_ERR_NOSPACE) { 966 ret = fdt_increase_size(blob, 512); 967 if (!ret) 968 goto add_ro; 969 else 970 goto err_size; 971 } else if (ret < 0) 972 goto err_prop; 973 } 974 975 cell.r0 = cpu_to_fdt32(part->offset); 976 cell.r1 = cpu_to_fdt32(part->size); 977 add_reg: 978 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 979 if (ret == -FDT_ERR_NOSPACE) { 980 ret = fdt_increase_size(blob, 512); 981 if (!ret) 982 goto add_reg; 983 else 984 goto err_size; 985 } else if (ret < 0) 986 goto err_prop; 987 988 add_label: 989 ret = fdt_setprop_string(blob, newoff, "label", part->name); 990 if (ret == -FDT_ERR_NOSPACE) { 991 ret = fdt_increase_size(blob, 512); 992 if (!ret) 993 goto add_label; 994 else 995 goto err_size; 996 } else if (ret < 0) 997 goto err_prop; 998 999 part_num++; 1000 } 1001 return 0; 1002 err_size: 1003 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1004 return ret; 1005 err_prop: 1006 printf("Can't add property: %s\n", fdt_strerror(ret)); 1007 return ret; 1008 } 1009 1010 /* 1011 * Update partitions in nor/nand nodes using info from 1012 * mtdparts environment variable. The nodes to update are 1013 * specified by node_info structure which contains mtd device 1014 * type and compatible string: E. g. the board code in 1015 * ft_board_setup() could use: 1016 * 1017 * struct node_info nodes[] = { 1018 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 1019 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 1020 * }; 1021 * 1022 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 1023 */ 1024 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 1025 { 1026 struct node_info *ni = node_info; 1027 struct mtd_device *dev; 1028 int i, idx; 1029 int noff; 1030 1031 if (mtdparts_init() != 0) 1032 return; 1033 1034 for (i = 0; i < node_info_size; i++) { 1035 idx = 0; 1036 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 1037 while (noff != -FDT_ERR_NOTFOUND) { 1038 debug("%s: %s, mtd dev type %d\n", 1039 fdt_get_name(blob, noff, 0), 1040 ni[i].compat, ni[i].type); 1041 dev = device_find(ni[i].type, idx++); 1042 if (dev) { 1043 if (fdt_node_set_part_info(blob, noff, dev)) 1044 return; /* return on error */ 1045 } 1046 1047 /* Jump to next flash node */ 1048 noff = fdt_node_offset_by_compatible(blob, noff, 1049 ni[i].compat); 1050 } 1051 } 1052 } 1053 #endif 1054 1055 void fdt_del_node_and_alias(void *blob, const char *alias) 1056 { 1057 int off = fdt_path_offset(blob, alias); 1058 1059 if (off < 0) 1060 return; 1061 1062 fdt_del_node(blob, off); 1063 1064 off = fdt_path_offset(blob, "/aliases"); 1065 fdt_delprop(blob, off, alias); 1066 } 1067 1068 /* Max address size we deal with */ 1069 #define OF_MAX_ADDR_CELLS 4 1070 #define OF_BAD_ADDR FDT_ADDR_T_NONE 1071 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 1072 (ns) > 0) 1073 1074 /* Debug utility */ 1075 #ifdef DEBUG 1076 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 1077 { 1078 printf("%s", s); 1079 while(na--) 1080 printf(" %08x", *(addr++)); 1081 printf("\n"); 1082 } 1083 #else 1084 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 1085 #endif 1086 1087 /** 1088 * struct of_bus - Callbacks for bus specific translators 1089 * @name: A string used to identify this bus in debug output. 1090 * @addresses: The name of the DT property from which addresses are 1091 * to be read, typically "reg". 1092 * @match: Return non-zero if the node whose parent is at 1093 * parentoffset in the FDT blob corresponds to a bus 1094 * of this type, otherwise return zero. If NULL a match 1095 * is assumed. 1096 * @count_cells:Count how many cells (be32 values) a node whose parent 1097 * is at parentoffset in the FDT blob will require to 1098 * represent its address (written to *addrc) & size 1099 * (written to *sizec). 1100 * @map: Map the address addr from the address space of this 1101 * bus to that of its parent, making use of the ranges 1102 * read from DT to an array at range. na and ns are the 1103 * number of cells (be32 values) used to hold and address 1104 * or size, respectively, for this bus. pna is the number 1105 * of cells used to hold an address for the parent bus. 1106 * Returns the address in the address space of the parent 1107 * bus. 1108 * @translate: Update the value of the address cells at addr within an 1109 * FDT by adding offset to it. na specifies the number of 1110 * cells used to hold the address being translated. Returns 1111 * zero on success, non-zero on error. 1112 * 1113 * Each bus type will include a struct of_bus in the of_busses array, 1114 * providing implementations of some or all of the functions used to 1115 * match the bus & handle address translation for its children. 1116 */ 1117 struct of_bus { 1118 const char *name; 1119 const char *addresses; 1120 int (*match)(const void *blob, int parentoffset); 1121 void (*count_cells)(const void *blob, int parentoffset, 1122 int *addrc, int *sizec); 1123 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 1124 int na, int ns, int pna); 1125 int (*translate)(fdt32_t *addr, u64 offset, int na); 1126 }; 1127 1128 /* Default translator (generic bus) */ 1129 void fdt_support_default_count_cells(const void *blob, int parentoffset, 1130 int *addrc, int *sizec) 1131 { 1132 const fdt32_t *prop; 1133 1134 if (addrc) 1135 *addrc = fdt_address_cells(blob, parentoffset); 1136 1137 if (sizec) { 1138 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 1139 if (prop) 1140 *sizec = be32_to_cpup(prop); 1141 else 1142 *sizec = 1; 1143 } 1144 } 1145 1146 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1147 int na, int ns, int pna) 1148 { 1149 u64 cp, s, da; 1150 1151 cp = fdt_read_number(range, na); 1152 s = fdt_read_number(range + na + pna, ns); 1153 da = fdt_read_number(addr, na); 1154 1155 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 1156 ", da=%" PRIu64 "\n", cp, s, da); 1157 1158 if (da < cp || da >= (cp + s)) 1159 return OF_BAD_ADDR; 1160 return da - cp; 1161 } 1162 1163 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1164 { 1165 u64 a = fdt_read_number(addr, na); 1166 memset(addr, 0, na * 4); 1167 a += offset; 1168 if (na > 1) 1169 addr[na - 2] = cpu_to_fdt32(a >> 32); 1170 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1171 1172 return 0; 1173 } 1174 1175 #ifdef CONFIG_OF_ISA_BUS 1176 1177 /* ISA bus translator */ 1178 static int of_bus_isa_match(const void *blob, int parentoffset) 1179 { 1180 const char *name; 1181 1182 name = fdt_get_name(blob, parentoffset, NULL); 1183 if (!name) 1184 return 0; 1185 1186 return !strcmp(name, "isa"); 1187 } 1188 1189 static void of_bus_isa_count_cells(const void *blob, int parentoffset, 1190 int *addrc, int *sizec) 1191 { 1192 if (addrc) 1193 *addrc = 2; 1194 if (sizec) 1195 *sizec = 1; 1196 } 1197 1198 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range, 1199 int na, int ns, int pna) 1200 { 1201 u64 cp, s, da; 1202 1203 /* Check address type match */ 1204 if ((addr[0] ^ range[0]) & cpu_to_be32(1)) 1205 return OF_BAD_ADDR; 1206 1207 cp = fdt_read_number(range + 1, na - 1); 1208 s = fdt_read_number(range + na + pna, ns); 1209 da = fdt_read_number(addr + 1, na - 1); 1210 1211 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64 1212 ", da=%" PRIu64 "\n", cp, s, da); 1213 1214 if (da < cp || da >= (cp + s)) 1215 return OF_BAD_ADDR; 1216 return da - cp; 1217 } 1218 1219 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na) 1220 { 1221 return of_bus_default_translate(addr + 1, offset, na - 1); 1222 } 1223 1224 #endif /* CONFIG_OF_ISA_BUS */ 1225 1226 /* Array of bus specific translators */ 1227 static struct of_bus of_busses[] = { 1228 #ifdef CONFIG_OF_ISA_BUS 1229 /* ISA */ 1230 { 1231 .name = "isa", 1232 .addresses = "reg", 1233 .match = of_bus_isa_match, 1234 .count_cells = of_bus_isa_count_cells, 1235 .map = of_bus_isa_map, 1236 .translate = of_bus_isa_translate, 1237 }, 1238 #endif /* CONFIG_OF_ISA_BUS */ 1239 /* Default */ 1240 { 1241 .name = "default", 1242 .addresses = "reg", 1243 .count_cells = fdt_support_default_count_cells, 1244 .map = of_bus_default_map, 1245 .translate = of_bus_default_translate, 1246 }, 1247 }; 1248 1249 static struct of_bus *of_match_bus(const void *blob, int parentoffset) 1250 { 1251 struct of_bus *bus; 1252 1253 if (ARRAY_SIZE(of_busses) == 1) 1254 return of_busses; 1255 1256 for (bus = of_busses; bus; bus++) { 1257 if (!bus->match || bus->match(blob, parentoffset)) 1258 return bus; 1259 } 1260 1261 /* 1262 * We should always have matched the default bus at least, since 1263 * it has a NULL match field. If we didn't then it somehow isn't 1264 * in the of_busses array or something equally catastrophic has 1265 * gone wrong. 1266 */ 1267 assert(0); 1268 return NULL; 1269 } 1270 1271 static int of_translate_one(const void *blob, int parent, struct of_bus *bus, 1272 struct of_bus *pbus, fdt32_t *addr, 1273 int na, int ns, int pna, const char *rprop) 1274 { 1275 const fdt32_t *ranges; 1276 int rlen; 1277 int rone; 1278 u64 offset = OF_BAD_ADDR; 1279 1280 /* Normally, an absence of a "ranges" property means we are 1281 * crossing a non-translatable boundary, and thus the addresses 1282 * below the current not cannot be converted to CPU physical ones. 1283 * Unfortunately, while this is very clear in the spec, it's not 1284 * what Apple understood, and they do have things like /uni-n or 1285 * /ht nodes with no "ranges" property and a lot of perfectly 1286 * useable mapped devices below them. Thus we treat the absence of 1287 * "ranges" as equivalent to an empty "ranges" property which means 1288 * a 1:1 translation at that level. It's up to the caller not to try 1289 * to translate addresses that aren't supposed to be translated in 1290 * the first place. --BenH. 1291 */ 1292 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1293 if (ranges == NULL || rlen == 0) { 1294 offset = fdt_read_number(addr, na); 1295 memset(addr, 0, pna * 4); 1296 debug("OF: no ranges, 1:1 translation\n"); 1297 goto finish; 1298 } 1299 1300 debug("OF: walking ranges...\n"); 1301 1302 /* Now walk through the ranges */ 1303 rlen /= 4; 1304 rone = na + pna + ns; 1305 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1306 offset = bus->map(addr, ranges, na, ns, pna); 1307 if (offset != OF_BAD_ADDR) 1308 break; 1309 } 1310 if (offset == OF_BAD_ADDR) { 1311 debug("OF: not found !\n"); 1312 return 1; 1313 } 1314 memcpy(addr, ranges + na, 4 * pna); 1315 1316 finish: 1317 of_dump_addr("OF: parent translation for:", addr, pna); 1318 debug("OF: with offset: %" PRIu64 "\n", offset); 1319 1320 /* Translate it into parent bus space */ 1321 return pbus->translate(addr, offset, pna); 1322 } 1323 1324 /* 1325 * Translate an address from the device-tree into a CPU physical address, 1326 * this walks up the tree and applies the various bus mappings on the 1327 * way. 1328 * 1329 * Note: We consider that crossing any level with #size-cells == 0 to mean 1330 * that translation is impossible (that is we are not dealing with a value 1331 * that can be mapped to a cpu physical address). This is not really specified 1332 * that way, but this is traditionally the way IBM at least do things 1333 */ 1334 static u64 __of_translate_address(const void *blob, int node_offset, 1335 const fdt32_t *in_addr, const char *rprop) 1336 { 1337 int parent; 1338 struct of_bus *bus, *pbus; 1339 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1340 int na, ns, pna, pns; 1341 u64 result = OF_BAD_ADDR; 1342 1343 debug("OF: ** translation for device %s **\n", 1344 fdt_get_name(blob, node_offset, NULL)); 1345 1346 /* Get parent & match bus type */ 1347 parent = fdt_parent_offset(blob, node_offset); 1348 if (parent < 0) 1349 goto bail; 1350 bus = of_match_bus(blob, parent); 1351 1352 /* Cound address cells & copy address locally */ 1353 bus->count_cells(blob, parent, &na, &ns); 1354 if (!OF_CHECK_COUNTS(na, ns)) { 1355 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1356 fdt_get_name(blob, node_offset, NULL)); 1357 goto bail; 1358 } 1359 memcpy(addr, in_addr, na * 4); 1360 1361 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1362 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1363 of_dump_addr("OF: translating address:", addr, na); 1364 1365 /* Translate */ 1366 for (;;) { 1367 /* Switch to parent bus */ 1368 node_offset = parent; 1369 parent = fdt_parent_offset(blob, node_offset); 1370 1371 /* If root, we have finished */ 1372 if (parent < 0) { 1373 debug("OF: reached root node\n"); 1374 result = fdt_read_number(addr, na); 1375 break; 1376 } 1377 1378 /* Get new parent bus and counts */ 1379 pbus = of_match_bus(blob, parent); 1380 pbus->count_cells(blob, parent, &pna, &pns); 1381 if (!OF_CHECK_COUNTS(pna, pns)) { 1382 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1383 fdt_get_name(blob, node_offset, NULL)); 1384 break; 1385 } 1386 1387 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1388 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1389 1390 /* Apply bus translation */ 1391 if (of_translate_one(blob, node_offset, bus, pbus, 1392 addr, na, ns, pna, rprop)) 1393 break; 1394 1395 /* Complete the move up one level */ 1396 na = pna; 1397 ns = pns; 1398 bus = pbus; 1399 1400 of_dump_addr("OF: one level translation:", addr, na); 1401 } 1402 bail: 1403 1404 return result; 1405 } 1406 1407 u64 fdt_translate_address(const void *blob, int node_offset, 1408 const fdt32_t *in_addr) 1409 { 1410 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1411 } 1412 1413 /** 1414 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1415 * who's reg property matches a physical cpu address 1416 * 1417 * @blob: ptr to device tree 1418 * @compat: compatiable string to match 1419 * @compat_off: property name 1420 * 1421 */ 1422 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1423 phys_addr_t compat_off) 1424 { 1425 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1426 while (off != -FDT_ERR_NOTFOUND) { 1427 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1428 if (reg) { 1429 if (compat_off == fdt_translate_address(blob, off, reg)) 1430 return off; 1431 } 1432 off = fdt_node_offset_by_compatible(blob, off, compat); 1433 } 1434 1435 return -FDT_ERR_NOTFOUND; 1436 } 1437 1438 /** 1439 * fdt_alloc_phandle: Return next free phandle value 1440 * 1441 * @blob: ptr to device tree 1442 */ 1443 int fdt_alloc_phandle(void *blob) 1444 { 1445 int offset; 1446 uint32_t phandle = 0; 1447 1448 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1449 offset = fdt_next_node(blob, offset, NULL)) { 1450 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1451 } 1452 1453 return phandle + 1; 1454 } 1455 1456 /* 1457 * fdt_set_phandle: Create a phandle property for the given node 1458 * 1459 * @fdt: ptr to device tree 1460 * @nodeoffset: node to update 1461 * @phandle: phandle value to set (must be unique) 1462 */ 1463 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1464 { 1465 int ret; 1466 1467 #ifdef DEBUG 1468 int off = fdt_node_offset_by_phandle(fdt, phandle); 1469 1470 if ((off >= 0) && (off != nodeoffset)) { 1471 char buf[64]; 1472 1473 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1474 printf("Trying to update node %s with phandle %u ", 1475 buf, phandle); 1476 1477 fdt_get_path(fdt, off, buf, sizeof(buf)); 1478 printf("that already exists in node %s.\n", buf); 1479 return -FDT_ERR_BADPHANDLE; 1480 } 1481 #endif 1482 1483 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1484 if (ret < 0) 1485 return ret; 1486 1487 /* 1488 * For now, also set the deprecated "linux,phandle" property, so that we 1489 * don't break older kernels. 1490 */ 1491 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1492 1493 return ret; 1494 } 1495 1496 /* 1497 * fdt_create_phandle: Create a phandle property for the given node 1498 * 1499 * @fdt: ptr to device tree 1500 * @nodeoffset: node to update 1501 */ 1502 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1503 { 1504 /* see if there is a phandle already */ 1505 int phandle = fdt_get_phandle(fdt, nodeoffset); 1506 1507 /* if we got 0, means no phandle so create one */ 1508 if (phandle == 0) { 1509 int ret; 1510 1511 phandle = fdt_alloc_phandle(fdt); 1512 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1513 if (ret < 0) { 1514 printf("Can't set phandle %u: %s\n", phandle, 1515 fdt_strerror(ret)); 1516 return 0; 1517 } 1518 } 1519 1520 return phandle; 1521 } 1522 1523 /* 1524 * fdt_set_node_status: Set status for the given node 1525 * 1526 * @fdt: ptr to device tree 1527 * @nodeoffset: node to update 1528 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1529 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1530 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1531 */ 1532 int fdt_set_node_status(void *fdt, int nodeoffset, 1533 enum fdt_status status, unsigned int error_code) 1534 { 1535 char buf[16]; 1536 int ret = 0; 1537 1538 if (nodeoffset < 0) 1539 return nodeoffset; 1540 1541 switch (status) { 1542 case FDT_STATUS_OKAY: 1543 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1544 break; 1545 case FDT_STATUS_DISABLED: 1546 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1547 break; 1548 case FDT_STATUS_FAIL: 1549 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1550 break; 1551 case FDT_STATUS_FAIL_ERROR_CODE: 1552 sprintf(buf, "fail-%d", error_code); 1553 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1554 break; 1555 default: 1556 printf("Invalid fdt status: %x\n", status); 1557 ret = -1; 1558 break; 1559 } 1560 1561 return ret; 1562 } 1563 1564 /* 1565 * fdt_set_status_by_alias: Set status for the given node given an alias 1566 * 1567 * @fdt: ptr to device tree 1568 * @alias: alias of node to update 1569 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1570 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1571 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1572 */ 1573 int fdt_set_status_by_alias(void *fdt, const char* alias, 1574 enum fdt_status status, unsigned int error_code) 1575 { 1576 int offset = fdt_path_offset(fdt, alias); 1577 1578 return fdt_set_node_status(fdt, offset, status, error_code); 1579 } 1580 1581 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1582 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1583 { 1584 int noff; 1585 int ret; 1586 1587 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1588 if (noff != -FDT_ERR_NOTFOUND) { 1589 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1590 add_edid: 1591 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1592 if (ret == -FDT_ERR_NOSPACE) { 1593 ret = fdt_increase_size(blob, 512); 1594 if (!ret) 1595 goto add_edid; 1596 else 1597 goto err_size; 1598 } else if (ret < 0) { 1599 printf("Can't add property: %s\n", fdt_strerror(ret)); 1600 return ret; 1601 } 1602 } 1603 return 0; 1604 err_size: 1605 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1606 return ret; 1607 } 1608 #endif 1609 1610 /* 1611 * Verify the physical address of device tree node for a given alias 1612 * 1613 * This function locates the device tree node of a given alias, and then 1614 * verifies that the physical address of that device matches the given 1615 * parameter. It displays a message if there is a mismatch. 1616 * 1617 * Returns 1 on success, 0 on failure 1618 */ 1619 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1620 { 1621 const char *path; 1622 const fdt32_t *reg; 1623 int node, len; 1624 u64 dt_addr; 1625 1626 path = fdt_getprop(fdt, anode, alias, NULL); 1627 if (!path) { 1628 /* If there's no such alias, then it's not a failure */ 1629 return 1; 1630 } 1631 1632 node = fdt_path_offset(fdt, path); 1633 if (node < 0) { 1634 printf("Warning: device tree alias '%s' points to invalid " 1635 "node %s.\n", alias, path); 1636 return 0; 1637 } 1638 1639 reg = fdt_getprop(fdt, node, "reg", &len); 1640 if (!reg) { 1641 printf("Warning: device tree node '%s' has no address.\n", 1642 path); 1643 return 0; 1644 } 1645 1646 dt_addr = fdt_translate_address(fdt, node, reg); 1647 if (addr != dt_addr) { 1648 printf("Warning: U-Boot configured device %s at address %" 1649 PRIx64 ",\n but the device tree has it address %" 1650 PRIx64 ".\n", alias, addr, dt_addr); 1651 return 0; 1652 } 1653 1654 return 1; 1655 } 1656 1657 /* 1658 * Returns the base address of an SOC or PCI node 1659 */ 1660 u64 fdt_get_base_address(const void *fdt, int node) 1661 { 1662 int size; 1663 const fdt32_t *prop; 1664 1665 prop = fdt_getprop(fdt, node, "reg", &size); 1666 1667 return prop ? fdt_translate_address(fdt, node, prop) : 0; 1668 } 1669 1670 /* 1671 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1672 */ 1673 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1674 uint64_t *val, int cells) 1675 { 1676 const fdt32_t *prop32 = &prop[cell_off]; 1677 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1678 1679 if ((cell_off + cells) > prop_len) 1680 return -FDT_ERR_NOSPACE; 1681 1682 switch (cells) { 1683 case 1: 1684 *val = fdt32_to_cpu(*prop32); 1685 break; 1686 case 2: 1687 *val = fdt64_to_cpu(*prop64); 1688 break; 1689 default: 1690 return -FDT_ERR_NOSPACE; 1691 } 1692 1693 return 0; 1694 } 1695 1696 /** 1697 * fdt_read_range - Read a node's n'th range property 1698 * 1699 * @fdt: ptr to device tree 1700 * @node: offset of node 1701 * @n: range index 1702 * @child_addr: pointer to storage for the "child address" field 1703 * @addr: pointer to storage for the CPU view translated physical start 1704 * @len: pointer to storage for the range length 1705 * 1706 * Convenience function that reads and interprets a specific range out of 1707 * a number of the "ranges" property array. 1708 */ 1709 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1710 uint64_t *addr, uint64_t *len) 1711 { 1712 int pnode = fdt_parent_offset(fdt, node); 1713 const fdt32_t *ranges; 1714 int pacells; 1715 int acells; 1716 int scells; 1717 int ranges_len; 1718 int cell = 0; 1719 int r = 0; 1720 1721 /* 1722 * The "ranges" property is an array of 1723 * { <child address> <parent address> <size in child address space> } 1724 * 1725 * All 3 elements can span a diffent number of cells. Fetch their size. 1726 */ 1727 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1728 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1729 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1730 1731 /* Now try to get the ranges property */ 1732 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1733 if (!ranges) 1734 return -FDT_ERR_NOTFOUND; 1735 ranges_len /= sizeof(uint32_t); 1736 1737 /* Jump to the n'th entry */ 1738 cell = n * (pacells + acells + scells); 1739 1740 /* Read <child address> */ 1741 if (child_addr) { 1742 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1743 acells); 1744 if (r) 1745 return r; 1746 } 1747 cell += acells; 1748 1749 /* Read <parent address> */ 1750 if (addr) 1751 *addr = fdt_translate_address(fdt, node, ranges + cell); 1752 cell += pacells; 1753 1754 /* Read <size in child address space> */ 1755 if (len) { 1756 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1757 if (r) 1758 return r; 1759 } 1760 1761 return 0; 1762 } 1763 1764 /** 1765 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1766 * 1767 * @fdt: ptr to device tree 1768 * @node: offset of the simplefb node 1769 * @base_address: framebuffer base address 1770 * @width: width in pixels 1771 * @height: height in pixels 1772 * @stride: bytes per line 1773 * @format: pixel format string 1774 * 1775 * Convenience function to fill and enable a simplefb node. 1776 */ 1777 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1778 u32 height, u32 stride, const char *format) 1779 { 1780 char name[32]; 1781 fdt32_t cells[4]; 1782 int i, addrc, sizec, ret; 1783 1784 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1785 &addrc, &sizec); 1786 i = 0; 1787 if (addrc == 2) 1788 cells[i++] = cpu_to_fdt32(base_address >> 32); 1789 cells[i++] = cpu_to_fdt32(base_address); 1790 if (sizec == 2) 1791 cells[i++] = 0; 1792 cells[i++] = cpu_to_fdt32(height * stride); 1793 1794 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1795 if (ret < 0) 1796 return ret; 1797 1798 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1799 ret = fdt_set_name(fdt, node, name); 1800 if (ret < 0) 1801 return ret; 1802 1803 ret = fdt_setprop_u32(fdt, node, "width", width); 1804 if (ret < 0) 1805 return ret; 1806 1807 ret = fdt_setprop_u32(fdt, node, "height", height); 1808 if (ret < 0) 1809 return ret; 1810 1811 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1812 if (ret < 0) 1813 return ret; 1814 1815 ret = fdt_setprop_string(fdt, node, "format", format); 1816 if (ret < 0) 1817 return ret; 1818 1819 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1820 if (ret < 0) 1821 return ret; 1822 1823 return 0; 1824 } 1825 1826 /* 1827 * Update native-mode in display-timings from display environment variable. 1828 * The node to update are specified by path. 1829 */ 1830 int fdt_fixup_display(void *blob, const char *path, const char *display) 1831 { 1832 int off, toff; 1833 1834 if (!display || !path) 1835 return -FDT_ERR_NOTFOUND; 1836 1837 toff = fdt_path_offset(blob, path); 1838 if (toff >= 0) 1839 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1840 if (toff < 0) 1841 return toff; 1842 1843 for (off = fdt_first_subnode(blob, toff); 1844 off >= 0; 1845 off = fdt_next_subnode(blob, off)) { 1846 uint32_t h = fdt_get_phandle(blob, off); 1847 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1848 fdt32_to_cpu(h)); 1849 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1850 return fdt_setprop_u32(blob, toff, "native-mode", h); 1851 } 1852 return toff; 1853 } 1854 1855 #ifdef CONFIG_OF_LIBFDT_OVERLAY 1856 /** 1857 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting 1858 * 1859 * @fdt: ptr to device tree 1860 * @fdto: ptr to device tree overlay 1861 * 1862 * Convenience function to apply an overlay and display helpful messages 1863 * in the case of an error 1864 */ 1865 int fdt_overlay_apply_verbose(void *fdt, void *fdto) 1866 { 1867 int err; 1868 bool has_symbols; 1869 1870 err = fdt_path_offset(fdt, "/__symbols__"); 1871 has_symbols = err >= 0; 1872 1873 err = fdt_overlay_apply(fdt, fdto); 1874 if (err < 0) { 1875 printf("failed on fdt_overlay_apply(): %s\n", 1876 fdt_strerror(err)); 1877 if (!has_symbols) { 1878 printf("base fdt does did not have a /__symbols__ node\n"); 1879 printf("make sure you've compiled with -@\n"); 1880 } 1881 } 1882 return err; 1883 } 1884 #endif 1885