1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (C) Copyright 2007 4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com 5 * 6 * Copyright 2010-2011 Freescale Semiconductor, Inc. 7 */ 8 9#include <common.h> 10#include <abuf.h> 11#include <env.h> 12#include <log.h> 13#include <mapmem.h> 14#include <net.h> 15#include <stdio_dev.h> 16#include <dm/ofnode.h> 17#include <linux/ctype.h> 18#include <linux/types.h> 19#include <asm/global_data.h> 20#include <asm/unaligned.h> 21#include <linux/libfdt.h> 22#include <fdt_support.h> 23#include <exports.h> 24#include <fdtdec.h> 25#include <version.h> 26#include <video.h> 27 28DECLARE_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 */ 42u32 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 */ 72u32 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 */ 96int 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 */ 120int 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#if defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) 136static int fdt_fixup_stdout(void *fdt, int chosenoff) 137{ 138 int err; 139 int aliasoff; 140 char sername[9] = { 0 }; 141 const void *path; 142 int len; 143 char tmp[256]; /* long enough */ 144 145 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 146 147 aliasoff = fdt_path_offset(fdt, "/aliases"); 148 if (aliasoff < 0) { 149 err = aliasoff; 150 goto noalias; 151 } 152 153 path = fdt_getprop(fdt, aliasoff, sername, &len); 154 if (!path) { 155 err = len; 156 goto noalias; 157 } 158 159 /* fdt_setprop may break "path" so we copy it to tmp buffer */ 160 memcpy(tmp, path, len); 161 162 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); 163 if (err < 0) 164 printf("WARNING: could not set linux,stdout-path %s.\n", 165 fdt_strerror(err)); 166 167 return err; 168 169noalias: 170 printf("WARNING: %s: could not read %s alias: %s\n", 171 __func__, sername, fdt_strerror(err)); 172 173 return 0; 174} 175#else 176static int fdt_fixup_stdout(void *fdt, int chosenoff) 177{ 178 return 0; 179} 180#endif 181 182static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, 183 uint64_t val, int is_u64) 184{ 185 if (is_u64) 186 return fdt_setprop_u64(fdt, nodeoffset, name, val); 187 else 188 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); 189} 190 191int fdt_root(void *fdt) 192{ 193 char *serial; 194 int err; 195 196 err = fdt_check_header(fdt); 197 if (err < 0) { 198 printf("fdt_root: %s\n", fdt_strerror(err)); 199 return err; 200 } 201 202 serial = env_get("serial#"); 203 if (serial) { 204 err = fdt_setprop(fdt, 0, "serial-number", serial, 205 strlen(serial) + 1); 206 207 if (err < 0) { 208 printf("WARNING: could not set serial-number %s.\n", 209 fdt_strerror(err)); 210 return err; 211 } 212 } 213 214 return 0; 215} 216 217int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) 218{ 219 int nodeoffset; 220 int err, j, total; 221 int is_u64; 222 uint64_t addr, size; 223 224 /* just return if the size of initrd is zero */ 225 if (initrd_start == initrd_end) 226 return 0; 227 228 /* find or create "/chosen" node. */ 229 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 230 if (nodeoffset < 0) 231 return nodeoffset; 232 233 total = fdt_num_mem_rsv(fdt); 234 235 /* 236 * Look for an existing entry and update it. If we don't find 237 * the entry, we will j be the next available slot. 238 */ 239 for (j = 0; j < total; j++) { 240 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 241 if (addr == initrd_start) { 242 fdt_del_mem_rsv(fdt, j); 243 break; 244 } 245 } 246 247 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 248 if (err < 0) { 249 printf("fdt_initrd: %s\n", fdt_strerror(err)); 250 return err; 251 } 252 253 is_u64 = (fdt_address_cells(fdt, 0) == 2); 254 255 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", 256 (uint64_t)initrd_start, is_u64); 257 258 if (err < 0) { 259 printf("WARNING: could not set linux,initrd-start %s.\n", 260 fdt_strerror(err)); 261 return err; 262 } 263 264 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", 265 (uint64_t)initrd_end, is_u64); 266 267 if (err < 0) { 268 printf("WARNING: could not set linux,initrd-end %s.\n", 269 fdt_strerror(err)); 270 271 return err; 272 } 273 274 return 0; 275} 276 277/** 278 * board_fdt_chosen_bootargs - boards may override this function to use 279 * alternative kernel command line arguments 280 */ 281__weak char *board_fdt_chosen_bootargs(void) 282{ 283 return env_get("bootargs"); 284} 285 286int fdt_chosen(void *fdt) 287{ 288 struct abuf buf = {}; 289 int nodeoffset; 290 int err; 291 char *str; /* used to set string properties */ 292 293 err = fdt_check_header(fdt); 294 if (err < 0) { 295 printf("fdt_chosen: %s\n", fdt_strerror(err)); 296 return err; 297 } 298 299 /* find or create "/chosen" node. */ 300 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 301 if (nodeoffset < 0) 302 return nodeoffset; 303 304 if (IS_ENABLED(CONFIG_BOARD_RNG_SEED) && !board_rng_seed(&buf)) { 305 err = fdt_setprop(fdt, nodeoffset, "rng-seed", 306 abuf_data(&buf), abuf_size(&buf)); 307 abuf_uninit(&buf); 308 if (err < 0) { 309 printf("WARNING: could not set rng-seed %s.\n", 310 fdt_strerror(err)); 311 return err; 312 } 313 } 314 315 str = board_fdt_chosen_bootargs(); 316 317 if (str) { 318 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 319 strlen(str) + 1); 320 if (err < 0) { 321 printf("WARNING: could not set bootargs %s.\n", 322 fdt_strerror(err)); 323 return err; 324 } 325 } 326 327 /* add u-boot version */ 328 err = fdt_setprop(fdt, nodeoffset, "u-boot,version", PLAIN_VERSION, 329 strlen(PLAIN_VERSION) + 1); 330 if (err < 0) { 331 printf("WARNING: could not set u-boot,version %s.\n", 332 fdt_strerror(err)); 333 return err; 334 } 335 336 return fdt_fixup_stdout(fdt, nodeoffset); 337} 338 339void do_fixup_by_path(void *fdt, const char *path, const char *prop, 340 const void *val, int len, int create) 341{ 342#if defined(DEBUG) 343 int i; 344 debug("Updating property '%s/%s' = ", path, prop); 345 for (i = 0; i < len; i++) 346 debug(" %.2x", *(u8*)(val+i)); 347 debug("\n"); 348#endif 349 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 350 if (rc) 351 printf("Unable to update property %s:%s, err=%s\n", 352 path, prop, fdt_strerror(rc)); 353} 354 355void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 356 u32 val, int create) 357{ 358 fdt32_t tmp = cpu_to_fdt32(val); 359 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 360} 361 362void do_fixup_by_prop(void *fdt, 363 const char *pname, const void *pval, int plen, 364 const char *prop, const void *val, int len, 365 int create) 366{ 367 int off; 368#if defined(DEBUG) 369 int i; 370 debug("Updating property '%s' = ", prop); 371 for (i = 0; i < len; i++) 372 debug(" %.2x", *(u8*)(val+i)); 373 debug("\n"); 374#endif 375 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 376 while (off != -FDT_ERR_NOTFOUND) { 377 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 378 fdt_setprop(fdt, off, prop, val, len); 379 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 380 } 381} 382 383void do_fixup_by_prop_u32(void *fdt, 384 const char *pname, const void *pval, int plen, 385 const char *prop, u32 val, int create) 386{ 387 fdt32_t tmp = cpu_to_fdt32(val); 388 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 389} 390 391void do_fixup_by_compat(void *fdt, const char *compat, 392 const char *prop, const void *val, int len, int create) 393{ 394 int off = -1; 395#if defined(DEBUG) 396 int i; 397 debug("Updating property '%s' = ", prop); 398 for (i = 0; i < len; i++) 399 debug(" %.2x", *(u8*)(val+i)); 400 debug("\n"); 401#endif 402 fdt_for_each_node_by_compatible(off, fdt, -1, compat) 403 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 404 fdt_setprop(fdt, off, prop, val, len); 405} 406 407void do_fixup_by_compat_u32(void *fdt, const char *compat, 408 const char *prop, u32 val, int create) 409{ 410 fdt32_t tmp = cpu_to_fdt32(val); 411 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 412} 413 414#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY 415/* 416 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 417 */ 418static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 419 int n) 420{ 421 int i; 422 int address_cells = fdt_address_cells(fdt, 0); 423 int size_cells = fdt_size_cells(fdt, 0); 424 char *p = buf; 425 426 for (i = 0; i < n; i++) { 427 if (address_cells == 2) 428 put_unaligned_be64(address[i], p); 429 else 430 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 431 p += 4 * address_cells; 432 433 if (size_cells == 2) 434 put_unaligned_be64(size[i], p); 435 else 436 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 437 p += 4 * size_cells; 438 } 439 440 return p - (char *)buf; 441} 442 443#if CONFIG_NR_DRAM_BANKS > 4 444#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 445#else 446#define MEMORY_BANKS_MAX 4 447#endif 448 449/** 450 * fdt_fixup_memory_banks - Update DT memory node 451 * @blob: Pointer to DT blob 452 * @start: Pointer to memory start addresses array 453 * @size: Pointer to memory sizes array 454 * @banks: Number of memory banks 455 * 456 * Return: 0 on success, negative value on failure 457 * 458 * Based on the passed number of banks and arrays, the function is able to 459 * update existing DT memory nodes to match run time detected/changed memory 460 * configuration. Implementation is handling one specific case with only one 461 * memory node where multiple tuples could be added/updated. 462 * The case where multiple memory nodes with a single tuple (base, size) are 463 * used, this function is only updating the first memory node without removing 464 * others. 465 */ 466int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 467{ 468 int err, nodeoffset; 469 int len, i; 470 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 471 472 if (banks > MEMORY_BANKS_MAX) { 473 printf("%s: num banks %d exceeds hardcoded limit %d." 474 " Recompile with higher MEMORY_BANKS_MAX?\n", 475 __FUNCTION__, banks, MEMORY_BANKS_MAX); 476 return -1; 477 } 478 479 err = fdt_check_header(blob); 480 if (err < 0) { 481 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 482 return err; 483 } 484 485 /* find or create "/memory" node. */ 486 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 487 if (nodeoffset < 0) 488 return nodeoffset; 489 490 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 491 sizeof("memory")); 492 if (err < 0) { 493 printf("WARNING: could not set %s %s.\n", "device_type", 494 fdt_strerror(err)); 495 return err; 496 } 497 498 for (i = 0; i < banks; i++) { 499 if (start[i] == 0 && size[i] == 0) 500 break; 501 } 502 503 banks = i; 504 505 if (!banks) 506 return 0; 507 508 len = fdt_pack_reg(blob, tmp, start, size, banks); 509 510 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 511 if (err < 0) { 512 printf("WARNING: could not set %s %s.\n", 513 "reg", fdt_strerror(err)); 514 return err; 515 } 516 return 0; 517} 518 519int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int areas) 520{ 521 int err, nodeoffset; 522 int len; 523 u8 tmp[8 * 16]; /* Up to 64-bit address + 64-bit size */ 524 525 if (areas > 8) { 526 printf("%s: num areas %d exceeds hardcoded limit %d\n", 527 __func__, areas, 8); 528 return -1; 529 } 530 531 err = fdt_check_header(blob); 532 if (err < 0) { 533 printf("%s: %s\n", __func__, fdt_strerror(err)); 534 return err; 535 } 536 537 /* find or create "/memory" node. */ 538 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 539 if (nodeoffset < 0) 540 return nodeoffset; 541 542 len = fdt_pack_reg(blob, tmp, start, size, areas); 543 544 err = fdt_setprop(blob, nodeoffset, "linux,usable-memory", tmp, len); 545 if (err < 0) { 546 printf("WARNING: could not set %s %s.\n", 547 "reg", fdt_strerror(err)); 548 return err; 549 } 550 551 return 0; 552} 553#endif 554 555int fdt_fixup_memory(void *blob, u64 start, u64 size) 556{ 557 return fdt_fixup_memory_banks(blob, &start, &size, 1); 558} 559 560void fdt_fixup_ethernet(void *fdt) 561{ 562 int i = 0, j, prop; 563 char *tmp, *end; 564 char mac[16]; 565 const char *path; 566 unsigned char mac_addr[ARP_HLEN]; 567 int offset; 568#ifdef FDT_SEQ_MACADDR_FROM_ENV 569 int nodeoff; 570 const struct fdt_property *fdt_prop; 571#endif 572 573 if (fdt_path_offset(fdt, "/aliases") < 0) 574 return; 575 576 /* Cycle through all aliases */ 577 for (prop = 0; ; prop++) { 578 const char *name; 579 580 /* FDT might have been edited, recompute the offset */ 581 offset = fdt_first_property_offset(fdt, 582 fdt_path_offset(fdt, "/aliases")); 583 /* Select property number 'prop' */ 584 for (j = 0; j < prop; j++) 585 offset = fdt_next_property_offset(fdt, offset); 586 587 if (offset < 0) 588 break; 589 590 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 591 if (!strncmp(name, "ethernet", 8)) { 592 /* Treat plain "ethernet" same as "ethernet0". */ 593 if (!strcmp(name, "ethernet") 594#ifdef FDT_SEQ_MACADDR_FROM_ENV 595 || !strcmp(name, "ethernet0") 596#endif 597 ) 598 i = 0; 599#ifndef FDT_SEQ_MACADDR_FROM_ENV 600 else 601 i = trailing_strtol(name); 602#endif 603 if (i != -1) { 604 if (i == 0) 605 strcpy(mac, "ethaddr"); 606 else 607 sprintf(mac, "eth%daddr", i); 608 } else { 609 continue; 610 } 611#ifdef FDT_SEQ_MACADDR_FROM_ENV 612 nodeoff = fdt_path_offset(fdt, path); 613 fdt_prop = fdt_get_property(fdt, nodeoff, "status", 614 NULL); 615 if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) 616 continue; 617 i++; 618#endif 619 tmp = env_get(mac); 620 if (!tmp) 621 continue; 622 623 for (j = 0; j < 6; j++) { 624 mac_addr[j] = tmp ? 625 hextoul(tmp, &end) : 0; 626 if (tmp) 627 tmp = (*end) ? end + 1 : end; 628 } 629 630 do_fixup_by_path(fdt, path, "mac-address", 631 &mac_addr, 6, 0); 632 do_fixup_by_path(fdt, path, "local-mac-address", 633 &mac_addr, 6, 1); 634 } 635 } 636} 637 638int fdt_record_loadable(void *blob, u32 index, const char *name, 639 uintptr_t load_addr, u32 size, uintptr_t entry_point, 640 const char *type, const char *os, const char *arch) 641{ 642 int err, node; 643 644 err = fdt_check_header(blob); 645 if (err < 0) { 646 printf("%s: %s\n", __func__, fdt_strerror(err)); 647 return err; 648 } 649 650 /* find or create "/fit-images" node */ 651 node = fdt_find_or_add_subnode(blob, 0, "fit-images"); 652 if (node < 0) 653 return node; 654 655 /* find or create "/fit-images/<name>" node */ 656 node = fdt_find_or_add_subnode(blob, node, name); 657 if (node < 0) 658 return node; 659 660 fdt_setprop_u64(blob, node, "load", load_addr); 661 if (entry_point != -1) 662 fdt_setprop_u64(blob, node, "entry", entry_point); 663 fdt_setprop_u32(blob, node, "size", size); 664 if (type) 665 fdt_setprop_string(blob, node, "type", type); 666 if (os) 667 fdt_setprop_string(blob, node, "os", os); 668 if (arch) 669 fdt_setprop_string(blob, node, "arch", arch); 670 671 return node; 672} 673 674int fdt_shrink_to_minimum(void *blob, uint extrasize) 675{ 676 int i; 677 uint64_t addr, size; 678 int total, ret; 679 uint actualsize; 680 int fdt_memrsv = 0; 681 682 if (!blob) 683 return 0; 684 685 total = fdt_num_mem_rsv(blob); 686 for (i = 0; i < total; i++) { 687 fdt_get_mem_rsv(blob, i, &addr, &size); 688 if (addr == (uintptr_t)blob) { 689 fdt_del_mem_rsv(blob, i); 690 fdt_memrsv = 1; 691 break; 692 } 693 } 694 695 /* 696 * Calculate the actual size of the fdt 697 * plus the size needed for 5 fdt_add_mem_rsv, one 698 * for the fdt itself and 4 for a possible initrd 699 * ((initrd-start + initrd-end) * 2 (name & value)) 700 */ 701 actualsize = fdt_off_dt_strings(blob) + 702 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 703 704 actualsize += extrasize; 705 /* Make it so the fdt ends on a page boundary */ 706 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 707 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 708 709 /* Change the fdt header to reflect the correct size */ 710 fdt_set_totalsize(blob, actualsize); 711 712 if (fdt_memrsv) { 713 /* Add the new reservation */ 714 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize); 715 if (ret < 0) 716 return ret; 717 } 718 719 return actualsize; 720} 721 722/** 723 * fdt_delete_disabled_nodes: Delete all nodes with status == "disabled" 724 * 725 * @blob: ptr to device tree 726 */ 727int fdt_delete_disabled_nodes(void *blob) 728{ 729 while (1) { 730 int ret, offset; 731 732 offset = fdt_node_offset_by_prop_value(blob, -1, "status", 733 "disabled", 9); 734 if (offset < 0) 735 break; 736 737 ret = fdt_del_node(blob, offset); 738 if (ret < 0) 739 return ret; 740 } 741 742 return 0; 743} 744 745#ifdef CONFIG_PCI 746#define CFG_SYS_PCI_NR_INBOUND_WIN 4 747 748#define FDT_PCI_PREFETCH (0x40000000) 749#define FDT_PCI_MEM32 (0x02000000) 750#define FDT_PCI_IO (0x01000000) 751#define FDT_PCI_MEM64 (0x03000000) 752 753int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 754 755 int addrcell, sizecell, len, r; 756 u32 *dma_range; 757 /* sized based on pci addr cells, size-cells, & address-cells */ 758 u32 dma_ranges[(3 + 2 + 2) * CFG_SYS_PCI_NR_INBOUND_WIN]; 759 760 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 761 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 762 763 dma_range = &dma_ranges[0]; 764 for (r = 0; r < hose->region_count; r++) { 765 u64 bus_start, phys_start, size; 766 767 /* skip if !PCI_REGION_SYS_MEMORY */ 768 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 769 continue; 770 771 bus_start = (u64)hose->regions[r].bus_start; 772 phys_start = (u64)hose->regions[r].phys_start; 773 size = (u64)hose->regions[r].size; 774 775 dma_range[0] = 0; 776 if (size >= 0x100000000ull) 777 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM64); 778 else 779 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM32); 780 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 781 dma_range[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH); 782#ifdef CONFIG_SYS_PCI_64BIT 783 dma_range[1] = cpu_to_fdt32(bus_start >> 32); 784#else 785 dma_range[1] = 0; 786#endif 787 dma_range[2] = cpu_to_fdt32(bus_start & 0xffffffff); 788 789 if (addrcell == 2) { 790 dma_range[3] = cpu_to_fdt32(phys_start >> 32); 791 dma_range[4] = cpu_to_fdt32(phys_start & 0xffffffff); 792 } else { 793 dma_range[3] = cpu_to_fdt32(phys_start & 0xffffffff); 794 } 795 796 if (sizecell == 2) { 797 dma_range[3 + addrcell + 0] = 798 cpu_to_fdt32(size >> 32); 799 dma_range[3 + addrcell + 1] = 800 cpu_to_fdt32(size & 0xffffffff); 801 } else { 802 dma_range[3 + addrcell + 0] = 803 cpu_to_fdt32(size & 0xffffffff); 804 } 805 806 dma_range += (3 + addrcell + sizecell); 807 } 808 809 len = dma_range - &dma_ranges[0]; 810 if (len) 811 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 812 813 return 0; 814} 815#endif 816 817int fdt_increase_size(void *fdt, int add_len) 818{ 819 int newlen; 820 821 newlen = fdt_totalsize(fdt) + add_len; 822 823 /* Open in place with a new len */ 824 return fdt_open_into(fdt, fdt, newlen); 825} 826 827#ifdef CONFIG_FDT_FIXUP_PARTITIONS 828#include <jffs2/load_kernel.h> 829#include <mtd_node.h> 830 831static int fdt_del_subnodes(const void *blob, int parent_offset) 832{ 833 int off, ndepth; 834 int ret; 835 836 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 837 (off >= 0) && (ndepth > 0); 838 off = fdt_next_node(blob, off, &ndepth)) { 839 if (ndepth == 1) { 840 debug("delete %s: offset: %x\n", 841 fdt_get_name(blob, off, 0), off); 842 ret = fdt_del_node((void *)blob, off); 843 if (ret < 0) { 844 printf("Can't delete node: %s\n", 845 fdt_strerror(ret)); 846 return ret; 847 } else { 848 ndepth = 0; 849 off = parent_offset; 850 } 851 } 852 } 853 return 0; 854} 855 856static int fdt_del_partitions(void *blob, int parent_offset) 857{ 858 const void *prop; 859 int ndepth = 0; 860 int off; 861 int ret; 862 863 off = fdt_next_node(blob, parent_offset, &ndepth); 864 if (off > 0 && ndepth == 1) { 865 prop = fdt_getprop(blob, off, "label", NULL); 866 if (prop == NULL) { 867 /* 868 * Could not find label property, nand {}; node? 869 * Check subnode, delete partitions there if any. 870 */ 871 return fdt_del_partitions(blob, off); 872 } else { 873 ret = fdt_del_subnodes(blob, parent_offset); 874 if (ret < 0) { 875 printf("Can't remove subnodes: %s\n", 876 fdt_strerror(ret)); 877 return ret; 878 } 879 } 880 } 881 return 0; 882} 883 884static int fdt_node_set_part_info(void *blob, int parent_offset, 885 struct mtd_device *dev) 886{ 887 struct list_head *pentry; 888 struct part_info *part; 889 int off, ndepth = 0; 890 int part_num, ret; 891 int sizecell; 892 char buf[64]; 893 894 ret = fdt_del_partitions(blob, parent_offset); 895 if (ret < 0) 896 return ret; 897 898 /* 899 * Check if size/address is 1 or 2 cells. 900 * We assume #address-cells and #size-cells have same value. 901 */ 902 sizecell = fdt_getprop_u32_default_node(blob, parent_offset, 903 0, "#size-cells", 1); 904 905 /* 906 * Check if it is nand {}; subnode, adjust 907 * the offset in this case 908 */ 909 off = fdt_next_node(blob, parent_offset, &ndepth); 910 if (off > 0 && ndepth == 1) 911 parent_offset = off; 912 913 part_num = 0; 914 list_for_each_prev(pentry, &dev->parts) { 915 int newoff; 916 917 part = list_entry(pentry, struct part_info, link); 918 919 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 920 part_num, part->name, part->size, 921 part->offset, part->mask_flags); 922 923 sprintf(buf, "partition@%llx", part->offset); 924add_sub: 925 ret = fdt_add_subnode(blob, parent_offset, buf); 926 if (ret == -FDT_ERR_NOSPACE) { 927 ret = fdt_increase_size(blob, 512); 928 if (!ret) 929 goto add_sub; 930 else 931 goto err_size; 932 } else if (ret < 0) { 933 printf("Can't add partition node: %s\n", 934 fdt_strerror(ret)); 935 return ret; 936 } 937 newoff = ret; 938 939 /* Check MTD_WRITEABLE_CMD flag */ 940 if (part->mask_flags & 1) { 941add_ro: 942 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 943 if (ret == -FDT_ERR_NOSPACE) { 944 ret = fdt_increase_size(blob, 512); 945 if (!ret) 946 goto add_ro; 947 else 948 goto err_size; 949 } else if (ret < 0) 950 goto err_prop; 951 } 952 953add_reg: 954 if (sizecell == 2) { 955 ret = fdt_setprop_u64(blob, newoff, 956 "reg", part->offset); 957 if (!ret) 958 ret = fdt_appendprop_u64(blob, newoff, 959 "reg", part->size); 960 } else { 961 ret = fdt_setprop_u32(blob, newoff, 962 "reg", part->offset); 963 if (!ret) 964 ret = fdt_appendprop_u32(blob, newoff, 965 "reg", part->size); 966 } 967 968 if (ret == -FDT_ERR_NOSPACE) { 969 ret = fdt_increase_size(blob, 512); 970 if (!ret) 971 goto add_reg; 972 else 973 goto err_size; 974 } else if (ret < 0) 975 goto err_prop; 976 977add_label: 978 ret = fdt_setprop_string(blob, newoff, "label", part->name); 979 if (ret == -FDT_ERR_NOSPACE) { 980 ret = fdt_increase_size(blob, 512); 981 if (!ret) 982 goto add_label; 983 else 984 goto err_size; 985 } else if (ret < 0) 986 goto err_prop; 987 988 part_num++; 989 } 990 return 0; 991err_size: 992 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 993 return ret; 994err_prop: 995 printf("Can't add property: %s\n", fdt_strerror(ret)); 996 return ret; 997} 998 999/* 1000 * Update partitions in nor/nand nodes using info from 1001 * mtdparts environment variable. The nodes to update are 1002 * specified by node_info structure which contains mtd device 1003 * type and compatible string: E. g. the board code in 1004 * ft_board_setup() could use: 1005 * 1006 * struct node_info nodes[] = { 1007 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 1008 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 1009 * }; 1010 * 1011 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 1012 */ 1013void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info, 1014 int node_info_size) 1015{ 1016 struct mtd_device *dev; 1017 int i, idx; 1018 int noff, parts; 1019 bool inited = false; 1020 1021 for (i = 0; i < node_info_size; i++) { 1022 idx = 0; 1023 1024 fdt_for_each_node_by_compatible(noff, blob, -1, 1025 node_info[i].compat) { 1026 const char *prop; 1027 1028 prop = fdt_getprop(blob, noff, "status", NULL); 1029 if (prop && !strcmp(prop, "disabled")) 1030 continue; 1031 1032 debug("%s: %s, mtd dev type %d\n", 1033 fdt_get_name(blob, noff, 0), 1034 node_info[i].compat, node_info[i].type); 1035 1036 if (!inited) { 1037 if (mtdparts_init() != 0) 1038 return; 1039 inited = true; 1040 } 1041 1042 dev = device_find(node_info[i].type, idx++); 1043 if (dev) { 1044 parts = fdt_subnode_offset(blob, noff, 1045 "partitions"); 1046 if (parts < 0) 1047 parts = noff; 1048 1049 if (fdt_node_set_part_info(blob, parts, dev)) 1050 return; /* return on error */ 1051 } 1052 } 1053 } 1054} 1055#endif 1056 1057int fdt_copy_fixed_partitions(void *blob) 1058{ 1059 ofnode node, subnode; 1060 int off, suboff, res; 1061 char path[256]; 1062 int address_cells, size_cells; 1063 u8 i, j, child_count; 1064 1065 node = ofnode_by_compatible(ofnode_null(), "fixed-partitions"); 1066 while (ofnode_valid(node)) { 1067 /* copy the U-Boot fixed partition */ 1068 address_cells = ofnode_read_simple_addr_cells(node); 1069 size_cells = ofnode_read_simple_size_cells(node); 1070 1071 res = ofnode_get_path(ofnode_get_parent(node), path, sizeof(path)); 1072 if (res) 1073 return res; 1074 1075 off = fdt_path_offset(blob, path); 1076 if (off < 0) 1077 return -ENODEV; 1078 1079 off = fdt_find_or_add_subnode(blob, off, "partitions"); 1080 res = fdt_setprop_string(blob, off, "compatible", "fixed-partitions"); 1081 if (res) 1082 return res; 1083 1084 res = fdt_setprop_u32(blob, off, "#address-cells", address_cells); 1085 if (res) 1086 return res; 1087 1088 res = fdt_setprop_u32(blob, off, "#size-cells", size_cells); 1089 if (res) 1090 return res; 1091 1092 /* 1093 * parse partition in reverse order as fdt_find_or_add_subnode() only 1094 * insert the new node after the parent's properties 1095 */ 1096 child_count = ofnode_get_child_count(node); 1097 for (i = child_count; i > 0 ; i--) { 1098 subnode = ofnode_first_subnode(node); 1099 if (!ofnode_valid(subnode)) 1100 break; 1101 1102 for (j = 0; (j < i - 1); j++) 1103 subnode = ofnode_next_subnode(subnode); 1104 1105 if (!ofnode_valid(subnode)) 1106 break; 1107 1108 const u32 *reg; 1109 int len; 1110 1111 suboff = fdt_find_or_add_subnode(blob, off, ofnode_get_name(subnode)); 1112 res = fdt_setprop_string(blob, suboff, "label", 1113 ofnode_read_string(subnode, "label")); 1114 if (res) 1115 return res; 1116 1117 reg = ofnode_get_property(subnode, "reg", &len); 1118 res = fdt_setprop(blob, suboff, "reg", reg, len); 1119 if (res) 1120 return res; 1121 } 1122 1123 /* go to next fixed-partitions node */ 1124 node = ofnode_by_compatible(node, "fixed-partitions"); 1125 } 1126 1127 return 0; 1128} 1129 1130void fdt_del_node_and_alias(void *blob, const char *alias) 1131{ 1132 int off = fdt_path_offset(blob, alias); 1133 1134 if (off < 0) 1135 return; 1136 1137 fdt_del_node(blob, off); 1138 1139 off = fdt_path_offset(blob, "/aliases"); 1140 fdt_delprop(blob, off, alias); 1141} 1142 1143/* Max address size we deal with */ 1144#define OF_MAX_ADDR_CELLS 4 1145#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 1146 (ns) > 0) 1147 1148/* Debug utility */ 1149#ifdef DEBUG 1150static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 1151{ 1152 printf("%s", s); 1153 while(na--) 1154 printf(" %08x", *(addr++)); 1155 printf("\n"); 1156} 1157#else 1158static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 1159#endif 1160 1161/** 1162 * struct of_bus - Callbacks for bus specific translators 1163 * @name: A string used to identify this bus in debug output. 1164 * @addresses: The name of the DT property from which addresses are 1165 * to be read, typically "reg". 1166 * @match: Return non-zero if the node whose parent is at 1167 * parentoffset in the FDT blob corresponds to a bus 1168 * of this type, otherwise return zero. If NULL a match 1169 * is assumed. 1170 * @count_cells:Count how many cells (be32 values) a node whose parent 1171 * is at parentoffset in the FDT blob will require to 1172 * represent its address (written to *addrc) & size 1173 * (written to *sizec). 1174 * @map: Map the address addr from the address space of this 1175 * bus to that of its parent, making use of the ranges 1176 * read from DT to an array at range. na and ns are the 1177 * number of cells (be32 values) used to hold and address 1178 * or size, respectively, for this bus. pna is the number 1179 * of cells used to hold an address for the parent bus. 1180 * Returns the address in the address space of the parent 1181 * bus. 1182 * @translate: Update the value of the address cells at addr within an 1183 * FDT by adding offset to it. na specifies the number of 1184 * cells used to hold the address being translated. Returns 1185 * zero on success, non-zero on error. 1186 * 1187 * Each bus type will include a struct of_bus in the of_busses array, 1188 * providing implementations of some or all of the functions used to 1189 * match the bus & handle address translation for its children. 1190 */ 1191struct of_bus { 1192 const char *name; 1193 const char *addresses; 1194 int (*match)(const void *blob, int parentoffset); 1195 void (*count_cells)(const void *blob, int parentoffset, 1196 int *addrc, int *sizec); 1197 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 1198 int na, int ns, int pna); 1199 int (*translate)(fdt32_t *addr, u64 offset, int na); 1200}; 1201 1202/* Default translator (generic bus) */ 1203void fdt_support_default_count_cells(const void *blob, int parentoffset, 1204 int *addrc, int *sizec) 1205{ 1206 const fdt32_t *prop; 1207 1208 if (addrc) 1209 *addrc = fdt_address_cells(blob, parentoffset); 1210 1211 if (sizec) { 1212 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 1213 if (prop) 1214 *sizec = be32_to_cpup(prop); 1215 else 1216 *sizec = 1; 1217 } 1218} 1219 1220static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1221 int na, int ns, int pna) 1222{ 1223 u64 cp, s, da; 1224 1225 cp = fdt_read_number(range, na); 1226 s = fdt_read_number(range + na + pna, ns); 1227 da = fdt_read_number(addr, na); 1228 1229 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da); 1230 1231 if (da < cp || da >= (cp + s)) 1232 return OF_BAD_ADDR; 1233 return da - cp; 1234} 1235 1236static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1237{ 1238 u64 a = fdt_read_number(addr, na); 1239 memset(addr, 0, na * 4); 1240 a += offset; 1241 if (na > 1) 1242 addr[na - 2] = cpu_to_fdt32(a >> 32); 1243 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1244 1245 return 0; 1246} 1247 1248#ifdef CONFIG_OF_ISA_BUS 1249 1250/* ISA bus translator */ 1251static int of_bus_isa_match(const void *blob, int parentoffset) 1252{ 1253 const char *name; 1254 1255 name = fdt_get_name(blob, parentoffset, NULL); 1256 if (!name) 1257 return 0; 1258 1259 return !strcmp(name, "isa"); 1260} 1261 1262static void of_bus_isa_count_cells(const void *blob, int parentoffset, 1263 int *addrc, int *sizec) 1264{ 1265 if (addrc) 1266 *addrc = 2; 1267 if (sizec) 1268 *sizec = 1; 1269} 1270 1271static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range, 1272 int na, int ns, int pna) 1273{ 1274 u64 cp, s, da; 1275 1276 /* Check address type match */ 1277 if ((addr[0] ^ range[0]) & cpu_to_be32(1)) 1278 return OF_BAD_ADDR; 1279 1280 cp = fdt_read_number(range + 1, na - 1); 1281 s = fdt_read_number(range + na + pna, ns); 1282 da = fdt_read_number(addr + 1, na - 1); 1283 1284 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da); 1285 1286 if (da < cp || da >= (cp + s)) 1287 return OF_BAD_ADDR; 1288 return da - cp; 1289} 1290 1291static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na) 1292{ 1293 return of_bus_default_translate(addr + 1, offset, na - 1); 1294} 1295 1296#endif /* CONFIG_OF_ISA_BUS */ 1297 1298/* Array of bus specific translators */ 1299static struct of_bus of_busses[] = { 1300#ifdef CONFIG_OF_ISA_BUS 1301 /* ISA */ 1302 { 1303 .name = "isa", 1304 .addresses = "reg", 1305 .match = of_bus_isa_match, 1306 .count_cells = of_bus_isa_count_cells, 1307 .map = of_bus_isa_map, 1308 .translate = of_bus_isa_translate, 1309 }, 1310#endif /* CONFIG_OF_ISA_BUS */ 1311 /* Default */ 1312 { 1313 .name = "default", 1314 .addresses = "reg", 1315 .count_cells = fdt_support_default_count_cells, 1316 .map = of_bus_default_map, 1317 .translate = of_bus_default_translate, 1318 }, 1319}; 1320 1321static struct of_bus *of_match_bus(const void *blob, int parentoffset) 1322{ 1323 struct of_bus *bus; 1324 1325 if (ARRAY_SIZE(of_busses) == 1) 1326 return of_busses; 1327 1328 for (bus = of_busses; bus; bus++) { 1329 if (!bus->match || bus->match(blob, parentoffset)) 1330 return bus; 1331 } 1332 1333 /* 1334 * We should always have matched the default bus at least, since 1335 * it has a NULL match field. If we didn't then it somehow isn't 1336 * in the of_busses array or something equally catastrophic has 1337 * gone wrong. 1338 */ 1339 assert(0); 1340 return NULL; 1341} 1342 1343static int of_translate_one(const void *blob, int parent, struct of_bus *bus, 1344 struct of_bus *pbus, fdt32_t *addr, 1345 int na, int ns, int pna, const char *rprop) 1346{ 1347 const fdt32_t *ranges; 1348 int rlen; 1349 int rone; 1350 u64 offset = OF_BAD_ADDR; 1351 1352 /* Normally, an absence of a "ranges" property means we are 1353 * crossing a non-translatable boundary, and thus the addresses 1354 * below the current not cannot be converted to CPU physical ones. 1355 * Unfortunately, while this is very clear in the spec, it's not 1356 * what Apple understood, and they do have things like /uni-n or 1357 * /ht nodes with no "ranges" property and a lot of perfectly 1358 * useable mapped devices below them. Thus we treat the absence of 1359 * "ranges" as equivalent to an empty "ranges" property which means 1360 * a 1:1 translation at that level. It's up to the caller not to try 1361 * to translate addresses that aren't supposed to be translated in 1362 * the first place. --BenH. 1363 */ 1364 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1365 if (ranges == NULL || rlen == 0) { 1366 offset = fdt_read_number(addr, na); 1367 memset(addr, 0, pna * 4); 1368 debug("OF: no ranges, 1:1 translation\n"); 1369 goto finish; 1370 } 1371 1372 debug("OF: walking ranges...\n"); 1373 1374 /* Now walk through the ranges */ 1375 rlen /= 4; 1376 rone = na + pna + ns; 1377 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1378 offset = bus->map(addr, ranges, na, ns, pna); 1379 if (offset != OF_BAD_ADDR) 1380 break; 1381 } 1382 if (offset == OF_BAD_ADDR) { 1383 debug("OF: not found !\n"); 1384 return 1; 1385 } 1386 memcpy(addr, ranges + na, 4 * pna); 1387 1388 finish: 1389 of_dump_addr("OF: parent translation for:", addr, pna); 1390 debug("OF: with offset: %llu\n", offset); 1391 1392 /* Translate it into parent bus space */ 1393 return pbus->translate(addr, offset, pna); 1394} 1395 1396/* 1397 * Translate an address from the device-tree into a CPU physical address, 1398 * this walks up the tree and applies the various bus mappings on the 1399 * way. 1400 * 1401 * Note: We consider that crossing any level with #size-cells == 0 to mean 1402 * that translation is impossible (that is we are not dealing with a value 1403 * that can be mapped to a cpu physical address). This is not really specified 1404 * that way, but this is traditionally the way IBM at least do things 1405 */ 1406static u64 __of_translate_address(const void *blob, int node_offset, 1407 const fdt32_t *in_addr, const char *rprop) 1408{ 1409 int parent; 1410 struct of_bus *bus, *pbus; 1411 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1412 int na, ns, pna, pns; 1413 u64 result = OF_BAD_ADDR; 1414 1415 debug("OF: ** translation for device %s **\n", 1416 fdt_get_name(blob, node_offset, NULL)); 1417 1418 /* Get parent & match bus type */ 1419 parent = fdt_parent_offset(blob, node_offset); 1420 if (parent < 0) 1421 goto bail; 1422 bus = of_match_bus(blob, parent); 1423 1424 /* Cound address cells & copy address locally */ 1425 bus->count_cells(blob, parent, &na, &ns); 1426 if (!OF_CHECK_COUNTS(na, ns)) { 1427 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1428 fdt_get_name(blob, node_offset, NULL)); 1429 goto bail; 1430 } 1431 memcpy(addr, in_addr, na * 4); 1432 1433 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1434 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1435 of_dump_addr("OF: translating address:", addr, na); 1436 1437 /* Translate */ 1438 for (;;) { 1439 /* Switch to parent bus */ 1440 node_offset = parent; 1441 parent = fdt_parent_offset(blob, node_offset); 1442 1443 /* If root, we have finished */ 1444 if (parent < 0) { 1445 debug("OF: reached root node\n"); 1446 result = fdt_read_number(addr, na); 1447 break; 1448 } 1449 1450 /* Get new parent bus and counts */ 1451 pbus = of_match_bus(blob, parent); 1452 pbus->count_cells(blob, parent, &pna, &pns); 1453 if (!OF_CHECK_COUNTS(pna, pns)) { 1454 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1455 fdt_get_name(blob, node_offset, NULL)); 1456 break; 1457 } 1458 1459 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1460 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1461 1462 /* Apply bus translation */ 1463 if (of_translate_one(blob, node_offset, bus, pbus, 1464 addr, na, ns, pna, rprop)) 1465 break; 1466 1467 /* Complete the move up one level */ 1468 na = pna; 1469 ns = pns; 1470 bus = pbus; 1471 1472 of_dump_addr("OF: one level translation:", addr, na); 1473 } 1474 bail: 1475 1476 return result; 1477} 1478 1479u64 fdt_translate_address(const void *blob, int node_offset, 1480 const fdt32_t *in_addr) 1481{ 1482 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1483} 1484 1485u64 fdt_translate_dma_address(const void *blob, int node_offset, 1486 const fdt32_t *in_addr) 1487{ 1488 return __of_translate_address(blob, node_offset, in_addr, "dma-ranges"); 1489} 1490 1491int fdt_get_dma_range(const void *blob, int node, phys_addr_t *cpu, 1492 dma_addr_t *bus, u64 *size) 1493{ 1494 bool found_dma_ranges = false; 1495 struct of_bus *bus_node; 1496 const fdt32_t *ranges; 1497 int na, ns, pna, pns; 1498 int parent = node; 1499 int ret = 0; 1500 int len; 1501 1502 /* Find the closest dma-ranges property */ 1503 while (parent >= 0) { 1504 ranges = fdt_getprop(blob, parent, "dma-ranges", &len); 1505 1506 /* Ignore empty ranges, they imply no translation required */ 1507 if (ranges && len > 0) 1508 break; 1509 1510 /* Once we find 'dma-ranges', then a missing one is an error */ 1511 if (found_dma_ranges && !ranges) { 1512 ret = -EINVAL; 1513 goto out; 1514 } 1515 1516 if (ranges) 1517 found_dma_ranges = true; 1518 1519 parent = fdt_parent_offset(blob, parent); 1520 } 1521 1522 if (!ranges || parent < 0) { 1523 debug("no dma-ranges found for node %s\n", 1524 fdt_get_name(blob, node, NULL)); 1525 ret = -ENOENT; 1526 goto out; 1527 } 1528 1529 /* switch to that node */ 1530 node = parent; 1531 parent = fdt_parent_offset(blob, node); 1532 if (parent < 0) { 1533 printf("Found dma-ranges in root node, shouldn't happen\n"); 1534 ret = -EINVAL; 1535 goto out; 1536 } 1537 1538 /* Get the address sizes both for the bus and its parent */ 1539 bus_node = of_match_bus(blob, node); 1540 bus_node->count_cells(blob, node, &na, &ns); 1541 if (!OF_CHECK_COUNTS(na, ns)) { 1542 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1543 fdt_get_name(blob, node, NULL)); 1544 return -EINVAL; 1545 goto out; 1546 } 1547 1548 bus_node = of_match_bus(blob, parent); 1549 bus_node->count_cells(blob, parent, &pna, &pns); 1550 if (!OF_CHECK_COUNTS(pna, pns)) { 1551 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1552 fdt_get_name(blob, parent, NULL)); 1553 return -EINVAL; 1554 goto out; 1555 } 1556 1557 *bus = fdt_read_number(ranges, na); 1558 *cpu = fdt_translate_dma_address(blob, node, ranges + na); 1559 *size = fdt_read_number(ranges + na + pna, ns); 1560out: 1561 return ret; 1562} 1563 1564/** 1565 * fdt_node_offset_by_compat_reg: Find a node that matches compatible and 1566 * who's reg property matches a physical cpu address 1567 * 1568 * @blob: ptr to device tree 1569 * @compat: compatible string to match 1570 * @compat_off: property name 1571 * 1572 */ 1573int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1574 phys_addr_t compat_off) 1575{ 1576 int len, off; 1577 1578 fdt_for_each_node_by_compatible(off, blob, -1, compat) { 1579 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1580 if (reg && compat_off == fdt_translate_address(blob, off, reg)) 1581 return off; 1582 } 1583 1584 return -FDT_ERR_NOTFOUND; 1585} 1586 1587static int vnode_offset_by_pathf(void *blob, const char *fmt, va_list ap) 1588{ 1589 char path[512]; 1590 int len; 1591 1592 len = vsnprintf(path, sizeof(path), fmt, ap); 1593 if (len < 0 || len + 1 > sizeof(path)) 1594 return -FDT_ERR_NOSPACE; 1595 1596 return fdt_path_offset(blob, path); 1597} 1598 1599/** 1600 * fdt_node_offset_by_pathf: Find node offset by sprintf formatted path 1601 * 1602 * @blob: ptr to device tree 1603 * @fmt: path format 1604 * @ap: vsnprintf arguments 1605 */ 1606int fdt_node_offset_by_pathf(void *blob, const char *fmt, ...) 1607{ 1608 va_list ap; 1609 int res; 1610 1611 va_start(ap, fmt); 1612 res = vnode_offset_by_pathf(blob, fmt, ap); 1613 va_end(ap); 1614 1615 return res; 1616} 1617 1618/* 1619 * fdt_set_phandle: Create a phandle property for the given node 1620 * 1621 * @fdt: ptr to device tree 1622 * @nodeoffset: node to update 1623 * @phandle: phandle value to set (must be unique) 1624 */ 1625int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1626{ 1627 int ret; 1628 1629#ifdef DEBUG 1630 int off = fdt_node_offset_by_phandle(fdt, phandle); 1631 1632 if ((off >= 0) && (off != nodeoffset)) { 1633 char buf[64]; 1634 1635 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1636 printf("Trying to update node %s with phandle %u ", 1637 buf, phandle); 1638 1639 fdt_get_path(fdt, off, buf, sizeof(buf)); 1640 printf("that already exists in node %s.\n", buf); 1641 return -FDT_ERR_BADPHANDLE; 1642 } 1643#endif 1644 1645 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1646 1647 return ret; 1648} 1649 1650/* 1651 * fdt_create_phandle: Get or create a phandle property for the given node 1652 * 1653 * @fdt: ptr to device tree 1654 * @nodeoffset: node to update 1655 */ 1656unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1657{ 1658 /* see if there is a phandle already */ 1659 uint32_t phandle = fdt_get_phandle(fdt, nodeoffset); 1660 1661 /* if we got 0, means no phandle so create one */ 1662 if (phandle == 0) { 1663 int ret; 1664 1665 ret = fdt_generate_phandle(fdt, &phandle); 1666 if (ret < 0) { 1667 printf("Can't generate phandle: %s\n", 1668 fdt_strerror(ret)); 1669 return 0; 1670 } 1671 1672 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1673 if (ret < 0) { 1674 printf("Can't set phandle %u: %s\n", phandle, 1675 fdt_strerror(ret)); 1676 return 0; 1677 } 1678 } 1679 1680 return phandle; 1681} 1682 1683/** 1684 * fdt_create_phandle_by_compatible: Get or create a phandle for first node with 1685 * given compatible 1686 * 1687 * @fdt: ptr to device tree 1688 * @compat: node's compatible string 1689 */ 1690unsigned int fdt_create_phandle_by_compatible(void *fdt, const char *compat) 1691{ 1692 int offset = fdt_node_offset_by_compatible(fdt, -1, compat); 1693 1694 if (offset < 0) { 1695 printf("Can't find node with compatible \"%s\": %s\n", compat, 1696 fdt_strerror(offset)); 1697 return 0; 1698 } 1699 1700 return fdt_create_phandle(fdt, offset); 1701} 1702 1703/** 1704 * fdt_create_phandle_by_pathf: Get or create a phandle for node given by 1705 * sprintf-formatted path 1706 * 1707 * @fdt: ptr to device tree 1708 * @fmt, ...: path format string and arguments to pass to sprintf 1709 */ 1710unsigned int fdt_create_phandle_by_pathf(void *fdt, const char *fmt, ...) 1711{ 1712 va_list ap; 1713 int offset; 1714 1715 va_start(ap, fmt); 1716 offset = vnode_offset_by_pathf(fdt, fmt, ap); 1717 va_end(ap); 1718 1719 if (offset < 0) { 1720 printf("Can't find node by given path: %s\n", 1721 fdt_strerror(offset)); 1722 return 0; 1723 } 1724 1725 return fdt_create_phandle(fdt, offset); 1726} 1727 1728/* 1729 * fdt_set_node_status: Set status for the given node 1730 * 1731 * @fdt: ptr to device tree 1732 * @nodeoffset: node to update 1733 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL 1734 */ 1735int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status) 1736{ 1737 int ret = 0; 1738 1739 if (nodeoffset < 0) 1740 return nodeoffset; 1741 1742 switch (status) { 1743 case FDT_STATUS_OKAY: 1744 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1745 break; 1746 case FDT_STATUS_DISABLED: 1747 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1748 break; 1749 case FDT_STATUS_FAIL: 1750 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1751 break; 1752 default: 1753 printf("Invalid fdt status: %x\n", status); 1754 ret = -1; 1755 break; 1756 } 1757 1758 return ret; 1759} 1760 1761/* 1762 * fdt_set_status_by_alias: Set status for the given node given an alias 1763 * 1764 * @fdt: ptr to device tree 1765 * @alias: alias of node to update 1766 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL 1767 */ 1768int fdt_set_status_by_alias(void *fdt, const char* alias, 1769 enum fdt_status status) 1770{ 1771 int offset = fdt_path_offset(fdt, alias); 1772 1773 return fdt_set_node_status(fdt, offset, status); 1774} 1775 1776/** 1777 * fdt_set_status_by_compatible: Set node status for first node with given 1778 * compatible 1779 * 1780 * @fdt: ptr to device tree 1781 * @compat: node's compatible string 1782 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL 1783 */ 1784int fdt_set_status_by_compatible(void *fdt, const char *compat, 1785 enum fdt_status status) 1786{ 1787 int offset = fdt_node_offset_by_compatible(fdt, -1, compat); 1788 1789 if (offset < 0) 1790 return offset; 1791 1792 return fdt_set_node_status(fdt, offset, status); 1793} 1794 1795/** 1796 * fdt_set_status_by_pathf: Set node status for node given by sprintf-formatted 1797 * path 1798 * 1799 * @fdt: ptr to device tree 1800 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL 1801 * @fmt, ...: path format string and arguments to pass to sprintf 1802 */ 1803int fdt_set_status_by_pathf(void *fdt, enum fdt_status status, const char *fmt, 1804 ...) 1805{ 1806 va_list ap; 1807 int offset; 1808 1809 va_start(ap, fmt); 1810 offset = vnode_offset_by_pathf(fdt, fmt, ap); 1811 va_end(ap); 1812 1813 if (offset < 0) 1814 return offset; 1815 1816 return fdt_set_node_status(fdt, offset, status); 1817} 1818 1819/* 1820 * Verify the physical address of device tree node for a given alias 1821 * 1822 * This function locates the device tree node of a given alias, and then 1823 * verifies that the physical address of that device matches the given 1824 * parameter. It displays a message if there is a mismatch. 1825 * 1826 * Returns 1 on success, 0 on failure 1827 */ 1828int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1829{ 1830 const char *path; 1831 const fdt32_t *reg; 1832 int node, len; 1833 u64 dt_addr; 1834 1835 path = fdt_getprop(fdt, anode, alias, NULL); 1836 if (!path) { 1837 /* If there's no such alias, then it's not a failure */ 1838 return 1; 1839 } 1840 1841 node = fdt_path_offset(fdt, path); 1842 if (node < 0) { 1843 printf("Warning: device tree alias '%s' points to invalid " 1844 "node %s.\n", alias, path); 1845 return 0; 1846 } 1847 1848 reg = fdt_getprop(fdt, node, "reg", &len); 1849 if (!reg) { 1850 printf("Warning: device tree node '%s' has no address.\n", 1851 path); 1852 return 0; 1853 } 1854 1855 dt_addr = fdt_translate_address(fdt, node, reg); 1856 if (addr != dt_addr) { 1857 printf("Warning: U-Boot configured device %s at address %llu,\n" 1858 "but the device tree has it address %llx.\n", 1859 alias, addr, dt_addr); 1860 return 0; 1861 } 1862 1863 return 1; 1864} 1865 1866/* 1867 * Returns the base address of an SOC or PCI node 1868 */ 1869u64 fdt_get_base_address(const void *fdt, int node) 1870{ 1871 int size; 1872 const fdt32_t *prop; 1873 1874 prop = fdt_getprop(fdt, node, "reg", &size); 1875 1876 return prop ? fdt_translate_address(fdt, node, prop) : OF_BAD_ADDR; 1877} 1878 1879/* 1880 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells, 1881 * or 3 cells specially for a PCI address. 1882 */ 1883static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1884 uint64_t *val, int cells) 1885{ 1886 const fdt32_t *prop32; 1887 const unaligned_fdt64_t *prop64; 1888 1889 if ((cell_off + cells) > prop_len) 1890 return -FDT_ERR_NOSPACE; 1891 1892 prop32 = &prop[cell_off]; 1893 1894 /* 1895 * Special handling for PCI address in PCI bus <ranges> 1896 * 1897 * PCI child address is made up of 3 cells. Advance the cell offset 1898 * by 1 so that the PCI child address can be correctly read. 1899 */ 1900 if (cells == 3) 1901 cell_off += 1; 1902 prop64 = (const fdt64_t *)&prop[cell_off]; 1903 1904 switch (cells) { 1905 case 1: 1906 *val = fdt32_to_cpu(*prop32); 1907 break; 1908 case 2: 1909 case 3: 1910 *val = fdt64_to_cpu(*prop64); 1911 break; 1912 default: 1913 return -FDT_ERR_NOSPACE; 1914 } 1915 1916 return 0; 1917} 1918 1919/** 1920 * fdt_read_range - Read a node's n'th range property 1921 * 1922 * @fdt: ptr to device tree 1923 * @node: offset of node 1924 * @n: range index 1925 * @child_addr: pointer to storage for the "child address" field 1926 * @addr: pointer to storage for the CPU view translated physical start 1927 * @len: pointer to storage for the range length 1928 * 1929 * Convenience function that reads and interprets a specific range out of 1930 * a number of the "ranges" property array. 1931 */ 1932int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1933 uint64_t *addr, uint64_t *len) 1934{ 1935 int pnode = fdt_parent_offset(fdt, node); 1936 const fdt32_t *ranges; 1937 int pacells; 1938 int acells; 1939 int scells; 1940 int ranges_len; 1941 int cell = 0; 1942 int r = 0; 1943 1944 /* 1945 * The "ranges" property is an array of 1946 * { <child address> <parent address> <size in child address space> } 1947 * 1948 * All 3 elements can span a diffent number of cells. Fetch their size. 1949 */ 1950 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1951 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1952 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1953 1954 /* Now try to get the ranges property */ 1955 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1956 if (!ranges) 1957 return -FDT_ERR_NOTFOUND; 1958 ranges_len /= sizeof(uint32_t); 1959 1960 /* Jump to the n'th entry */ 1961 cell = n * (pacells + acells + scells); 1962 1963 /* Read <child address> */ 1964 if (child_addr) { 1965 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1966 acells); 1967 if (r) 1968 return r; 1969 } 1970 cell += acells; 1971 1972 /* Read <parent address> */ 1973 if (addr) 1974 *addr = fdt_translate_address(fdt, node, ranges + cell); 1975 cell += pacells; 1976 1977 /* Read <size in child address space> */ 1978 if (len) { 1979 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1980 if (r) 1981 return r; 1982 } 1983 1984 return 0; 1985} 1986 1987/** 1988 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1989 * 1990 * @fdt: ptr to device tree 1991 * @node: offset of the simplefb node 1992 * @base_address: framebuffer base address 1993 * @width: width in pixels 1994 * @height: height in pixels 1995 * @stride: bytes per line 1996 * @format: pixel format string 1997 * 1998 * Convenience function to fill and enable a simplefb node. 1999 */ 2000int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 2001 u32 height, u32 stride, const char *format) 2002{ 2003 char name[32]; 2004 fdt32_t cells[4]; 2005 int i, addrc, sizec, ret; 2006 2007 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node), 2008 &addrc, &sizec); 2009 i = 0; 2010 if (addrc == 2) 2011 cells[i++] = cpu_to_fdt32(base_address >> 32); 2012 cells[i++] = cpu_to_fdt32(base_address); 2013 if (sizec == 2) 2014 cells[i++] = 0; 2015 cells[i++] = cpu_to_fdt32(height * stride); 2016 2017 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 2018 if (ret < 0) 2019 return ret; 2020 2021 snprintf(name, sizeof(name), "framebuffer@%llx", base_address); 2022 ret = fdt_set_name(fdt, node, name); 2023 if (ret < 0) 2024 return ret; 2025 2026 ret = fdt_setprop_u32(fdt, node, "width", width); 2027 if (ret < 0) 2028 return ret; 2029 2030 ret = fdt_setprop_u32(fdt, node, "height", height); 2031 if (ret < 0) 2032 return ret; 2033 2034 ret = fdt_setprop_u32(fdt, node, "stride", stride); 2035 if (ret < 0) 2036 return ret; 2037 2038 ret = fdt_setprop_string(fdt, node, "format", format); 2039 if (ret < 0) 2040 return ret; 2041 2042 ret = fdt_setprop_string(fdt, node, "status", "okay"); 2043 if (ret < 0) 2044 return ret; 2045 2046 return 0; 2047} 2048 2049#if CONFIG_IS_ENABLED(VIDEO) 2050int fdt_add_fb_mem_rsv(void *blob) 2051{ 2052 struct fdt_memory mem; 2053 2054 /* nothing to do when the frame buffer is not defined */ 2055 if (gd->video_bottom == gd->video_top) 2056 return 0; 2057 2058 /* reserved with no-map tag the video buffer */ 2059 mem.start = gd->video_bottom; 2060 mem.end = gd->video_top - 1; 2061 2062 return fdtdec_add_reserved_memory(blob, "framebuffer", &mem, NULL, 0, NULL, 2063 FDTDEC_RESERVED_MEMORY_NO_MAP); 2064} 2065#endif 2066 2067/* 2068 * Update native-mode in display-timings from display environment variable. 2069 * The node to update are specified by path. 2070 */ 2071int fdt_fixup_display(void *blob, const char *path, const char *display) 2072{ 2073 int off, toff; 2074 2075 if (!display || !path) 2076 return -FDT_ERR_NOTFOUND; 2077 2078 toff = fdt_path_offset(blob, path); 2079 if (toff >= 0) 2080 toff = fdt_subnode_offset(blob, toff, "display-timings"); 2081 if (toff < 0) 2082 return toff; 2083 2084 for (off = fdt_first_subnode(blob, toff); 2085 off >= 0; 2086 off = fdt_next_subnode(blob, off)) { 2087 uint32_t h = fdt_get_phandle(blob, off); 2088 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 2089 fdt32_to_cpu(h)); 2090 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 2091 return fdt_setprop_u32(blob, toff, "native-mode", h); 2092 } 2093 return toff; 2094} 2095 2096#ifdef CONFIG_OF_LIBFDT_OVERLAY 2097/** 2098 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting 2099 * 2100 * @fdt: ptr to device tree 2101 * @fdto: ptr to device tree overlay 2102 * 2103 * Convenience function to apply an overlay and display helpful messages 2104 * in the case of an error 2105 */ 2106int fdt_overlay_apply_verbose(void *fdt, void *fdto) 2107{ 2108 int err; 2109 bool has_symbols; 2110 2111 err = fdt_path_offset(fdt, "/__symbols__"); 2112 has_symbols = err >= 0; 2113 2114 err = fdt_overlay_apply(fdt, fdto); 2115 if (err < 0) { 2116 printf("failed on fdt_overlay_apply(): %s\n", 2117 fdt_strerror(err)); 2118 if (!has_symbols) { 2119 printf("base fdt does not have a /__symbols__ node\n"); 2120 printf("make sure you've compiled with -@\n"); 2121 } 2122 } 2123 return err; 2124} 2125#endif 2126 2127/** 2128 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL 2129 * 2130 * @blobp: Pointer to FDT pointer 2131 * Return: 1 if OK, 0 if bad (in which case *blobp is set to NULL) 2132 */ 2133int fdt_valid(struct fdt_header **blobp) 2134{ 2135 const void *blob = *blobp; 2136 int err; 2137 2138 if (!blob) { 2139 printf("The address of the fdt is invalid (NULL).\n"); 2140 return 0; 2141 } 2142 2143 err = fdt_check_header(blob); 2144 if (err == 0) 2145 return 1; /* valid */ 2146 2147 if (err < 0) { 2148 printf("libfdt fdt_check_header(): %s", fdt_strerror(err)); 2149 /* 2150 * Be more informative on bad version. 2151 */ 2152 if (err == -FDT_ERR_BADVERSION) { 2153 if (fdt_version(blob) < 2154 FDT_FIRST_SUPPORTED_VERSION) { 2155 printf(" - too old, fdt %d < %d", 2156 fdt_version(blob), 2157 FDT_FIRST_SUPPORTED_VERSION); 2158 } 2159 if (fdt_last_comp_version(blob) > 2160 FDT_LAST_SUPPORTED_VERSION) { 2161 printf(" - too new, fdt %d > %d", 2162 fdt_version(blob), 2163 FDT_LAST_SUPPORTED_VERSION); 2164 } 2165 } 2166 printf("\n"); 2167 *blobp = NULL; 2168 return 0; 2169 } 2170 return 1; 2171} 2172