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