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