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