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