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