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