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 #ifndef CONFIG_ARCH_ROCKCHIP 295 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 296 strlen(str) + 1); 297 if (err < 0) { 298 printf("WARNING: could not set bootargs %s.\n", 299 fdt_strerror(err)); 300 return err; 301 } 302 #else 303 const char *bootargs = NULL; 304 char buf[2048]; 305 306 bootargs = fdt_getprop(fdt, nodeoffset, "bootargs", NULL); 307 if (bootargs) { 308 memset(buf, 0, sizeof(buf)); 309 snprintf(buf, sizeof(buf), "%s %s", bootargs, str); 310 err = fdt_setprop(fdt, nodeoffset, "bootargs", buf, 311 strlen(buf) + 1); 312 if (err < 0) { 313 printf("WARNING: could not set bootargs %s.\n", 314 fdt_strerror(err)); 315 return err; 316 } 317 } else { 318 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 319 strlen(str) + 1); 320 if (err < 0) { 321 printf("WARNING: could not set bootargs %s.\n", 322 fdt_strerror(err)); 323 return err; 324 } 325 } 326 #endif 327 } 328 329 return fdt_fixup_stdout(fdt, nodeoffset); 330 } 331 332 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 333 const void *val, int len, int create) 334 { 335 #if defined(DEBUG) 336 int i; 337 debug("Updating property '%s/%s' = ", path, prop); 338 for (i = 0; i < len; i++) 339 debug(" %.2x", *(u8*)(val+i)); 340 debug("\n"); 341 #endif 342 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 343 if (rc) 344 printf("Unable to update property %s:%s, err=%s\n", 345 path, prop, fdt_strerror(rc)); 346 } 347 348 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 349 u32 val, int create) 350 { 351 fdt32_t tmp = cpu_to_fdt32(val); 352 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 353 } 354 355 void do_fixup_by_prop(void *fdt, 356 const char *pname, const void *pval, int plen, 357 const char *prop, const void *val, int len, 358 int create) 359 { 360 int off; 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_prop_value(fdt, -1, pname, pval, plen); 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_prop_value(fdt, off, pname, pval, plen); 373 } 374 } 375 376 void do_fixup_by_prop_u32(void *fdt, 377 const char *pname, const void *pval, int plen, 378 const char *prop, u32 val, int create) 379 { 380 fdt32_t tmp = cpu_to_fdt32(val); 381 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 382 } 383 384 void do_fixup_by_compat(void *fdt, const char *compat, 385 const char *prop, const void *val, int len, int create) 386 { 387 int off = -1; 388 #if defined(DEBUG) 389 int i; 390 debug("Updating property '%s' = ", prop); 391 for (i = 0; i < len; i++) 392 debug(" %.2x", *(u8*)(val+i)); 393 debug("\n"); 394 #endif 395 off = fdt_node_offset_by_compatible(fdt, -1, compat); 396 while (off != -FDT_ERR_NOTFOUND) { 397 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 398 fdt_setprop(fdt, off, prop, val, len); 399 off = fdt_node_offset_by_compatible(fdt, off, compat); 400 } 401 } 402 403 void do_fixup_by_compat_u32(void *fdt, const char *compat, 404 const char *prop, u32 val, int create) 405 { 406 fdt32_t tmp = cpu_to_fdt32(val); 407 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 408 } 409 410 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY 411 /* 412 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 413 */ 414 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 415 int n) 416 { 417 int i; 418 int address_cells = fdt_address_cells(fdt, 0); 419 int size_cells = fdt_size_cells(fdt, 0); 420 char *p = buf; 421 422 for (i = 0; i < n; i++) { 423 if (address_cells == 2) 424 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 425 else 426 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 427 p += 4 * address_cells; 428 429 if (size_cells == 2) 430 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 431 else 432 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 433 p += 4 * size_cells; 434 } 435 436 return p - (char *)buf; 437 } 438 439 int fdt_record_loadable(void *blob, u32 index, const char *name, 440 uintptr_t load_addr, u32 size, uintptr_t entry_point, 441 const char *type, const char *os) 442 { 443 int err, node; 444 445 err = fdt_check_header(blob); 446 if (err < 0) { 447 printf("%s: %s\n", __func__, fdt_strerror(err)); 448 return err; 449 } 450 451 /* find or create "/fit-images" node */ 452 node = fdt_find_or_add_subnode(blob, 0, "fit-images"); 453 if (node < 0) 454 return node; 455 456 /* find or create "/fit-images/<name>" node */ 457 node = fdt_find_or_add_subnode(blob, node, name); 458 if (node < 0) 459 return node; 460 461 /* 462 * We record these as 32bit entities, possibly truncating addresses. 463 * However, spl_fit.c is not 64bit safe either: i.e. we should not 464 * have an issue here. 465 */ 466 fdt_setprop_u32(blob, node, "load-addr", load_addr); 467 if (entry_point != -1) 468 fdt_setprop_u32(blob, node, "entry-point", entry_point); 469 fdt_setprop_u32(blob, node, "size", size); 470 if (type) 471 fdt_setprop_string(blob, node, "type", type); 472 if (os) 473 fdt_setprop_string(blob, node, "os", os); 474 475 return node; 476 } 477 478 #ifdef CONFIG_NR_DRAM_BANKS 479 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 480 #else 481 #define MEMORY_BANKS_MAX 4 482 #endif 483 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 484 { 485 int err, nodeoffset; 486 int len; 487 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 488 489 if (banks > MEMORY_BANKS_MAX) { 490 printf("%s: num banks %d exceeds hardcoded limit %d." 491 " Recompile with higher MEMORY_BANKS_MAX?\n", 492 __FUNCTION__, banks, MEMORY_BANKS_MAX); 493 return -1; 494 } 495 496 err = fdt_check_header(blob); 497 if (err < 0) { 498 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 499 return err; 500 } 501 502 /* find or create "/memory" node. */ 503 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 504 if (nodeoffset < 0) 505 return nodeoffset; 506 507 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 508 sizeof("memory")); 509 if (err < 0) { 510 printf("WARNING: could not set %s %s.\n", "device_type", 511 fdt_strerror(err)); 512 return err; 513 } 514 515 if (!banks) 516 return 0; 517 518 len = fdt_pack_reg(blob, tmp, start, size, banks); 519 520 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 521 if (err < 0) { 522 printf("WARNING: could not set %s %s.\n", 523 "reg", fdt_strerror(err)); 524 return err; 525 } 526 return 0; 527 } 528 #endif 529 530 int fdt_fixup_memory(void *blob, u64 start, u64 size) 531 { 532 return fdt_fixup_memory_banks(blob, &start, &size, 1); 533 } 534 535 void fdt_fixup_ethernet(void *fdt) 536 { 537 int i = 0, j, prop; 538 char *tmp, *end; 539 char mac[16]; 540 const char *path; 541 unsigned char mac_addr[ARP_HLEN]; 542 int offset; 543 #ifdef FDT_SEQ_MACADDR_FROM_ENV 544 int nodeoff; 545 const struct fdt_property *fdt_prop; 546 #endif 547 548 if (fdt_path_offset(fdt, "/aliases") < 0) 549 return; 550 551 /* Cycle through all aliases */ 552 for (prop = 0; ; prop++) { 553 const char *name; 554 555 /* FDT might have been edited, recompute the offset */ 556 offset = fdt_first_property_offset(fdt, 557 fdt_path_offset(fdt, "/aliases")); 558 /* Select property number 'prop' */ 559 for (j = 0; j < prop; j++) 560 offset = fdt_next_property_offset(fdt, offset); 561 562 if (offset < 0) 563 break; 564 565 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 566 if (!strncmp(name, "ethernet", 8)) { 567 /* Treat plain "ethernet" same as "ethernet0". */ 568 if (!strcmp(name, "ethernet") 569 #ifdef FDT_SEQ_MACADDR_FROM_ENV 570 || !strcmp(name, "ethernet0") 571 #endif 572 ) 573 i = 0; 574 #ifndef FDT_SEQ_MACADDR_FROM_ENV 575 else 576 i = trailing_strtol(name); 577 #endif 578 if (i != -1) { 579 if (i == 0) 580 strcpy(mac, "ethaddr"); 581 else 582 sprintf(mac, "eth%daddr", i); 583 } else { 584 continue; 585 } 586 #ifdef FDT_SEQ_MACADDR_FROM_ENV 587 nodeoff = fdt_path_offset(fdt, path); 588 fdt_prop = fdt_get_property(fdt, nodeoff, "status", 589 NULL); 590 if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) 591 continue; 592 i++; 593 #endif 594 tmp = env_get(mac); 595 if (!tmp) 596 continue; 597 598 for (j = 0; j < 6; j++) { 599 mac_addr[j] = tmp ? 600 simple_strtoul(tmp, &end, 16) : 0; 601 if (tmp) 602 tmp = (*end) ? end + 1 : end; 603 } 604 605 do_fixup_by_path(fdt, path, "mac-address", 606 &mac_addr, 6, 0); 607 do_fixup_by_path(fdt, path, "local-mac-address", 608 &mac_addr, 6, 1); 609 } 610 } 611 } 612 613 /* Resize the fdt to its actual size + a bit of padding */ 614 int fdt_shrink_to_minimum(void *blob, uint extrasize) 615 { 616 int i; 617 uint64_t addr, size; 618 int total, ret; 619 uint actualsize; 620 621 if (!blob) 622 return 0; 623 624 total = fdt_num_mem_rsv(blob); 625 for (i = 0; i < total; i++) { 626 fdt_get_mem_rsv(blob, i, &addr, &size); 627 if (addr == (uintptr_t)blob) { 628 fdt_del_mem_rsv(blob, i); 629 break; 630 } 631 } 632 633 /* 634 * Calculate the actual size of the fdt 635 * plus the size needed for 5 fdt_add_mem_rsv, one 636 * for the fdt itself and 4 for a possible initrd 637 * ((initrd-start + initrd-end) * 2 (name & value)) 638 */ 639 actualsize = fdt_off_dt_strings(blob) + 640 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 641 642 actualsize += extrasize; 643 /* Make it so the fdt ends on a page boundary */ 644 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 645 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 646 647 /* Change the fdt header to reflect the correct size */ 648 fdt_set_totalsize(blob, actualsize); 649 650 /* Add the new reservation */ 651 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 652 if (ret < 0) 653 return ret; 654 655 return actualsize; 656 } 657 658 #ifdef CONFIG_PCI 659 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 660 661 #define FDT_PCI_PREFETCH (0x40000000) 662 #define FDT_PCI_MEM32 (0x02000000) 663 #define FDT_PCI_IO (0x01000000) 664 #define FDT_PCI_MEM64 (0x03000000) 665 666 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 667 668 int addrcell, sizecell, len, r; 669 u32 *dma_range; 670 /* sized based on pci addr cells, size-cells, & address-cells */ 671 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 672 673 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 674 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 675 676 dma_range = &dma_ranges[0]; 677 for (r = 0; r < hose->region_count; r++) { 678 u64 bus_start, phys_start, size; 679 680 /* skip if !PCI_REGION_SYS_MEMORY */ 681 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 682 continue; 683 684 bus_start = (u64)hose->regions[r].bus_start; 685 phys_start = (u64)hose->regions[r].phys_start; 686 size = (u64)hose->regions[r].size; 687 688 dma_range[0] = 0; 689 if (size >= 0x100000000ull) 690 dma_range[0] |= FDT_PCI_MEM64; 691 else 692 dma_range[0] |= FDT_PCI_MEM32; 693 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 694 dma_range[0] |= FDT_PCI_PREFETCH; 695 #ifdef CONFIG_SYS_PCI_64BIT 696 dma_range[1] = bus_start >> 32; 697 #else 698 dma_range[1] = 0; 699 #endif 700 dma_range[2] = bus_start & 0xffffffff; 701 702 if (addrcell == 2) { 703 dma_range[3] = phys_start >> 32; 704 dma_range[4] = phys_start & 0xffffffff; 705 } else { 706 dma_range[3] = phys_start & 0xffffffff; 707 } 708 709 if (sizecell == 2) { 710 dma_range[3 + addrcell + 0] = size >> 32; 711 dma_range[3 + addrcell + 1] = size & 0xffffffff; 712 } else { 713 dma_range[3 + addrcell + 0] = size & 0xffffffff; 714 } 715 716 dma_range += (3 + addrcell + sizecell); 717 } 718 719 len = dma_range - &dma_ranges[0]; 720 if (len) 721 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 722 723 return 0; 724 } 725 #endif 726 727 int fdt_increase_size(void *fdt, int add_len) 728 { 729 int newlen; 730 731 newlen = fdt_totalsize(fdt) + add_len; 732 733 /* Open in place with a new len */ 734 return fdt_open_into(fdt, fdt, newlen); 735 } 736 737 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 738 #include <jffs2/load_kernel.h> 739 #include <mtd_node.h> 740 741 struct reg_cell { 742 unsigned int r0; 743 unsigned int r1; 744 }; 745 746 int fdt_del_subnodes(const void *blob, int parent_offset) 747 { 748 int off, ndepth; 749 int ret; 750 751 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 752 (off >= 0) && (ndepth > 0); 753 off = fdt_next_node(blob, off, &ndepth)) { 754 if (ndepth == 1) { 755 debug("delete %s: offset: %x\n", 756 fdt_get_name(blob, off, 0), off); 757 ret = fdt_del_node((void *)blob, off); 758 if (ret < 0) { 759 printf("Can't delete node: %s\n", 760 fdt_strerror(ret)); 761 return ret; 762 } else { 763 ndepth = 0; 764 off = parent_offset; 765 } 766 } 767 } 768 return 0; 769 } 770 771 int fdt_del_partitions(void *blob, int parent_offset) 772 { 773 const void *prop; 774 int ndepth = 0; 775 int off; 776 int ret; 777 778 off = fdt_next_node(blob, parent_offset, &ndepth); 779 if (off > 0 && ndepth == 1) { 780 prop = fdt_getprop(blob, off, "label", NULL); 781 if (prop == NULL) { 782 /* 783 * Could not find label property, nand {}; node? 784 * Check subnode, delete partitions there if any. 785 */ 786 return fdt_del_partitions(blob, off); 787 } else { 788 ret = fdt_del_subnodes(blob, parent_offset); 789 if (ret < 0) { 790 printf("Can't remove subnodes: %s\n", 791 fdt_strerror(ret)); 792 return ret; 793 } 794 } 795 } 796 return 0; 797 } 798 799 int fdt_node_set_part_info(void *blob, int parent_offset, 800 struct mtd_device *dev) 801 { 802 struct list_head *pentry; 803 struct part_info *part; 804 struct reg_cell cell; 805 int off, ndepth = 0; 806 int part_num, ret; 807 char buf[64]; 808 809 ret = fdt_del_partitions(blob, parent_offset); 810 if (ret < 0) 811 return ret; 812 813 /* 814 * Check if it is nand {}; subnode, adjust 815 * the offset in this case 816 */ 817 off = fdt_next_node(blob, parent_offset, &ndepth); 818 if (off > 0 && ndepth == 1) 819 parent_offset = off; 820 821 part_num = 0; 822 list_for_each_prev(pentry, &dev->parts) { 823 int newoff; 824 825 part = list_entry(pentry, struct part_info, link); 826 827 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 828 part_num, part->name, part->size, 829 part->offset, part->mask_flags); 830 831 sprintf(buf, "partition@%llx", part->offset); 832 add_sub: 833 ret = fdt_add_subnode(blob, parent_offset, buf); 834 if (ret == -FDT_ERR_NOSPACE) { 835 ret = fdt_increase_size(blob, 512); 836 if (!ret) 837 goto add_sub; 838 else 839 goto err_size; 840 } else if (ret < 0) { 841 printf("Can't add partition node: %s\n", 842 fdt_strerror(ret)); 843 return ret; 844 } 845 newoff = ret; 846 847 /* Check MTD_WRITEABLE_CMD flag */ 848 if (part->mask_flags & 1) { 849 add_ro: 850 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 851 if (ret == -FDT_ERR_NOSPACE) { 852 ret = fdt_increase_size(blob, 512); 853 if (!ret) 854 goto add_ro; 855 else 856 goto err_size; 857 } else if (ret < 0) 858 goto err_prop; 859 } 860 861 cell.r0 = cpu_to_fdt32(part->offset); 862 cell.r1 = cpu_to_fdt32(part->size); 863 add_reg: 864 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 865 if (ret == -FDT_ERR_NOSPACE) { 866 ret = fdt_increase_size(blob, 512); 867 if (!ret) 868 goto add_reg; 869 else 870 goto err_size; 871 } else if (ret < 0) 872 goto err_prop; 873 874 add_label: 875 ret = fdt_setprop_string(blob, newoff, "label", part->name); 876 if (ret == -FDT_ERR_NOSPACE) { 877 ret = fdt_increase_size(blob, 512); 878 if (!ret) 879 goto add_label; 880 else 881 goto err_size; 882 } else if (ret < 0) 883 goto err_prop; 884 885 part_num++; 886 } 887 return 0; 888 err_size: 889 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 890 return ret; 891 err_prop: 892 printf("Can't add property: %s\n", fdt_strerror(ret)); 893 return ret; 894 } 895 896 /* 897 * Update partitions in nor/nand nodes using info from 898 * mtdparts environment variable. The nodes to update are 899 * specified by node_info structure which contains mtd device 900 * type and compatible string: E. g. the board code in 901 * ft_board_setup() could use: 902 * 903 * struct node_info nodes[] = { 904 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 905 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 906 * }; 907 * 908 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 909 */ 910 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 911 { 912 struct node_info *ni = node_info; 913 struct mtd_device *dev; 914 int i, idx; 915 int noff; 916 917 if (mtdparts_init() != 0) 918 return; 919 920 for (i = 0; i < node_info_size; i++) { 921 idx = 0; 922 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 923 while (noff != -FDT_ERR_NOTFOUND) { 924 debug("%s: %s, mtd dev type %d\n", 925 fdt_get_name(blob, noff, 0), 926 ni[i].compat, ni[i].type); 927 dev = device_find(ni[i].type, idx++); 928 if (dev) { 929 if (fdt_node_set_part_info(blob, noff, dev)) 930 return; /* return on error */ 931 } 932 933 /* Jump to next flash node */ 934 noff = fdt_node_offset_by_compatible(blob, noff, 935 ni[i].compat); 936 } 937 } 938 } 939 #endif 940 941 void fdt_del_node_and_alias(void *blob, const char *alias) 942 { 943 int off = fdt_path_offset(blob, alias); 944 945 if (off < 0) 946 return; 947 948 fdt_del_node(blob, off); 949 950 off = fdt_path_offset(blob, "/aliases"); 951 fdt_delprop(blob, off, alias); 952 } 953 954 /* Max address size we deal with */ 955 #define OF_MAX_ADDR_CELLS 4 956 #define OF_BAD_ADDR FDT_ADDR_T_NONE 957 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 958 (ns) > 0) 959 960 /* Debug utility */ 961 #ifdef DEBUG 962 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 963 { 964 printf("%s", s); 965 while(na--) 966 printf(" %08x", *(addr++)); 967 printf("\n"); 968 } 969 #else 970 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 971 #endif 972 973 /** 974 * struct of_bus - Callbacks for bus specific translators 975 * @name: A string used to identify this bus in debug output. 976 * @addresses: The name of the DT property from which addresses are 977 * to be read, typically "reg". 978 * @match: Return non-zero if the node whose parent is at 979 * parentoffset in the FDT blob corresponds to a bus 980 * of this type, otherwise return zero. If NULL a match 981 * is assumed. 982 * @count_cells:Count how many cells (be32 values) a node whose parent 983 * is at parentoffset in the FDT blob will require to 984 * represent its address (written to *addrc) & size 985 * (written to *sizec). 986 * @map: Map the address addr from the address space of this 987 * bus to that of its parent, making use of the ranges 988 * read from DT to an array at range. na and ns are the 989 * number of cells (be32 values) used to hold and address 990 * or size, respectively, for this bus. pna is the number 991 * of cells used to hold an address for the parent bus. 992 * Returns the address in the address space of the parent 993 * bus. 994 * @translate: Update the value of the address cells at addr within an 995 * FDT by adding offset to it. na specifies the number of 996 * cells used to hold the address being translated. Returns 997 * zero on success, non-zero on error. 998 * 999 * Each bus type will include a struct of_bus in the of_busses array, 1000 * providing implementations of some or all of the functions used to 1001 * match the bus & handle address translation for its children. 1002 */ 1003 struct of_bus { 1004 const char *name; 1005 const char *addresses; 1006 int (*match)(const void *blob, int parentoffset); 1007 void (*count_cells)(const void *blob, int parentoffset, 1008 int *addrc, int *sizec); 1009 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 1010 int na, int ns, int pna); 1011 int (*translate)(fdt32_t *addr, u64 offset, int na); 1012 }; 1013 1014 /* Default translator (generic bus) */ 1015 void fdt_support_default_count_cells(const void *blob, int parentoffset, 1016 int *addrc, int *sizec) 1017 { 1018 const fdt32_t *prop; 1019 1020 if (addrc) 1021 *addrc = fdt_address_cells(blob, parentoffset); 1022 1023 if (sizec) { 1024 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 1025 if (prop) 1026 *sizec = be32_to_cpup(prop); 1027 else 1028 *sizec = 1; 1029 } 1030 } 1031 1032 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1033 int na, int ns, int pna) 1034 { 1035 u64 cp, s, da; 1036 1037 cp = fdt_read_number(range, na); 1038 s = fdt_read_number(range + na + pna, ns); 1039 da = fdt_read_number(addr, na); 1040 1041 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 1042 ", da=%" PRIu64 "\n", cp, s, da); 1043 1044 if (da < cp || da >= (cp + s)) 1045 return OF_BAD_ADDR; 1046 return da - cp; 1047 } 1048 1049 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1050 { 1051 u64 a = fdt_read_number(addr, na); 1052 memset(addr, 0, na * 4); 1053 a += offset; 1054 if (na > 1) 1055 addr[na - 2] = cpu_to_fdt32(a >> 32); 1056 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1057 1058 return 0; 1059 } 1060 1061 #ifdef CONFIG_OF_ISA_BUS 1062 1063 /* ISA bus translator */ 1064 static int of_bus_isa_match(const void *blob, int parentoffset) 1065 { 1066 const char *name; 1067 1068 name = fdt_get_name(blob, parentoffset, NULL); 1069 if (!name) 1070 return 0; 1071 1072 return !strcmp(name, "isa"); 1073 } 1074 1075 static void of_bus_isa_count_cells(const void *blob, int parentoffset, 1076 int *addrc, int *sizec) 1077 { 1078 if (addrc) 1079 *addrc = 2; 1080 if (sizec) 1081 *sizec = 1; 1082 } 1083 1084 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range, 1085 int na, int ns, int pna) 1086 { 1087 u64 cp, s, da; 1088 1089 /* Check address type match */ 1090 if ((addr[0] ^ range[0]) & cpu_to_be32(1)) 1091 return OF_BAD_ADDR; 1092 1093 cp = fdt_read_number(range + 1, na - 1); 1094 s = fdt_read_number(range + na + pna, ns); 1095 da = fdt_read_number(addr + 1, na - 1); 1096 1097 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64 1098 ", da=%" PRIu64 "\n", cp, s, da); 1099 1100 if (da < cp || da >= (cp + s)) 1101 return OF_BAD_ADDR; 1102 return da - cp; 1103 } 1104 1105 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na) 1106 { 1107 return of_bus_default_translate(addr + 1, offset, na - 1); 1108 } 1109 1110 #endif /* CONFIG_OF_ISA_BUS */ 1111 1112 /* Array of bus specific translators */ 1113 static struct of_bus of_busses[] = { 1114 #ifdef CONFIG_OF_ISA_BUS 1115 /* ISA */ 1116 { 1117 .name = "isa", 1118 .addresses = "reg", 1119 .match = of_bus_isa_match, 1120 .count_cells = of_bus_isa_count_cells, 1121 .map = of_bus_isa_map, 1122 .translate = of_bus_isa_translate, 1123 }, 1124 #endif /* CONFIG_OF_ISA_BUS */ 1125 /* Default */ 1126 { 1127 .name = "default", 1128 .addresses = "reg", 1129 .count_cells = fdt_support_default_count_cells, 1130 .map = of_bus_default_map, 1131 .translate = of_bus_default_translate, 1132 }, 1133 }; 1134 1135 static struct of_bus *of_match_bus(const void *blob, int parentoffset) 1136 { 1137 struct of_bus *bus; 1138 1139 if (ARRAY_SIZE(of_busses) == 1) 1140 return of_busses; 1141 1142 for (bus = of_busses; bus; bus++) { 1143 if (!bus->match || bus->match(blob, parentoffset)) 1144 return bus; 1145 } 1146 1147 /* 1148 * We should always have matched the default bus at least, since 1149 * it has a NULL match field. If we didn't then it somehow isn't 1150 * in the of_busses array or something equally catastrophic has 1151 * gone wrong. 1152 */ 1153 assert(0); 1154 return NULL; 1155 } 1156 1157 static int of_translate_one(const void *blob, int parent, struct of_bus *bus, 1158 struct of_bus *pbus, fdt32_t *addr, 1159 int na, int ns, int pna, const char *rprop) 1160 { 1161 const fdt32_t *ranges; 1162 int rlen; 1163 int rone; 1164 u64 offset = OF_BAD_ADDR; 1165 1166 /* Normally, an absence of a "ranges" property means we are 1167 * crossing a non-translatable boundary, and thus the addresses 1168 * below the current not cannot be converted to CPU physical ones. 1169 * Unfortunately, while this is very clear in the spec, it's not 1170 * what Apple understood, and they do have things like /uni-n or 1171 * /ht nodes with no "ranges" property and a lot of perfectly 1172 * useable mapped devices below them. Thus we treat the absence of 1173 * "ranges" as equivalent to an empty "ranges" property which means 1174 * a 1:1 translation at that level. It's up to the caller not to try 1175 * to translate addresses that aren't supposed to be translated in 1176 * the first place. --BenH. 1177 */ 1178 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1179 if (ranges == NULL || rlen == 0) { 1180 offset = fdt_read_number(addr, na); 1181 memset(addr, 0, pna * 4); 1182 debug("OF: no ranges, 1:1 translation\n"); 1183 goto finish; 1184 } 1185 1186 debug("OF: walking ranges...\n"); 1187 1188 /* Now walk through the ranges */ 1189 rlen /= 4; 1190 rone = na + pna + ns; 1191 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1192 offset = bus->map(addr, ranges, na, ns, pna); 1193 if (offset != OF_BAD_ADDR) 1194 break; 1195 } 1196 if (offset == OF_BAD_ADDR) { 1197 debug("OF: not found !\n"); 1198 return 1; 1199 } 1200 memcpy(addr, ranges + na, 4 * pna); 1201 1202 finish: 1203 of_dump_addr("OF: parent translation for:", addr, pna); 1204 debug("OF: with offset: %" PRIu64 "\n", offset); 1205 1206 /* Translate it into parent bus space */ 1207 return pbus->translate(addr, offset, pna); 1208 } 1209 1210 /* 1211 * Translate an address from the device-tree into a CPU physical address, 1212 * this walks up the tree and applies the various bus mappings on the 1213 * way. 1214 * 1215 * Note: We consider that crossing any level with #size-cells == 0 to mean 1216 * that translation is impossible (that is we are not dealing with a value 1217 * that can be mapped to a cpu physical address). This is not really specified 1218 * that way, but this is traditionally the way IBM at least do things 1219 */ 1220 static u64 __of_translate_address(const void *blob, int node_offset, 1221 const fdt32_t *in_addr, const char *rprop) 1222 { 1223 int parent; 1224 struct of_bus *bus, *pbus; 1225 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1226 int na, ns, pna, pns; 1227 u64 result = OF_BAD_ADDR; 1228 1229 debug("OF: ** translation for device %s **\n", 1230 fdt_get_name(blob, node_offset, NULL)); 1231 1232 /* Get parent & match bus type */ 1233 parent = fdt_parent_offset(blob, node_offset); 1234 if (parent < 0) 1235 goto bail; 1236 bus = of_match_bus(blob, parent); 1237 1238 /* Cound address cells & copy address locally */ 1239 bus->count_cells(blob, parent, &na, &ns); 1240 if (!OF_CHECK_COUNTS(na, ns)) { 1241 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1242 fdt_get_name(blob, node_offset, NULL)); 1243 goto bail; 1244 } 1245 memcpy(addr, in_addr, na * 4); 1246 1247 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1248 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1249 of_dump_addr("OF: translating address:", addr, na); 1250 1251 /* Translate */ 1252 for (;;) { 1253 /* Switch to parent bus */ 1254 node_offset = parent; 1255 parent = fdt_parent_offset(blob, node_offset); 1256 1257 /* If root, we have finished */ 1258 if (parent < 0) { 1259 debug("OF: reached root node\n"); 1260 result = fdt_read_number(addr, na); 1261 break; 1262 } 1263 1264 /* Get new parent bus and counts */ 1265 pbus = of_match_bus(blob, parent); 1266 pbus->count_cells(blob, parent, &pna, &pns); 1267 if (!OF_CHECK_COUNTS(pna, pns)) { 1268 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1269 fdt_get_name(blob, node_offset, NULL)); 1270 break; 1271 } 1272 1273 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1274 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1275 1276 /* Apply bus translation */ 1277 if (of_translate_one(blob, node_offset, bus, pbus, 1278 addr, na, ns, pna, rprop)) 1279 break; 1280 1281 /* Complete the move up one level */ 1282 na = pna; 1283 ns = pns; 1284 bus = pbus; 1285 1286 of_dump_addr("OF: one level translation:", addr, na); 1287 } 1288 bail: 1289 1290 return result; 1291 } 1292 1293 u64 fdt_translate_address(const void *blob, int node_offset, 1294 const fdt32_t *in_addr) 1295 { 1296 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1297 } 1298 1299 /** 1300 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1301 * who's reg property matches a physical cpu address 1302 * 1303 * @blob: ptr to device tree 1304 * @compat: compatiable string to match 1305 * @compat_off: property name 1306 * 1307 */ 1308 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1309 phys_addr_t compat_off) 1310 { 1311 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1312 while (off != -FDT_ERR_NOTFOUND) { 1313 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1314 if (reg) { 1315 if (compat_off == fdt_translate_address(blob, off, reg)) 1316 return off; 1317 } 1318 off = fdt_node_offset_by_compatible(blob, off, compat); 1319 } 1320 1321 return -FDT_ERR_NOTFOUND; 1322 } 1323 1324 /** 1325 * fdt_alloc_phandle: Return next free phandle value 1326 * 1327 * @blob: ptr to device tree 1328 */ 1329 int fdt_alloc_phandle(void *blob) 1330 { 1331 int offset; 1332 uint32_t phandle = 0; 1333 1334 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1335 offset = fdt_next_node(blob, offset, NULL)) { 1336 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1337 } 1338 1339 return phandle + 1; 1340 } 1341 1342 /* 1343 * fdt_set_phandle: Create a phandle property for the given node 1344 * 1345 * @fdt: ptr to device tree 1346 * @nodeoffset: node to update 1347 * @phandle: phandle value to set (must be unique) 1348 */ 1349 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1350 { 1351 int ret; 1352 1353 #ifdef DEBUG 1354 int off = fdt_node_offset_by_phandle(fdt, phandle); 1355 1356 if ((off >= 0) && (off != nodeoffset)) { 1357 char buf[64]; 1358 1359 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1360 printf("Trying to update node %s with phandle %u ", 1361 buf, phandle); 1362 1363 fdt_get_path(fdt, off, buf, sizeof(buf)); 1364 printf("that already exists in node %s.\n", buf); 1365 return -FDT_ERR_BADPHANDLE; 1366 } 1367 #endif 1368 1369 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1370 if (ret < 0) 1371 return ret; 1372 1373 /* 1374 * For now, also set the deprecated "linux,phandle" property, so that we 1375 * don't break older kernels. 1376 */ 1377 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1378 1379 return ret; 1380 } 1381 1382 /* 1383 * fdt_create_phandle: Create a phandle property for the given node 1384 * 1385 * @fdt: ptr to device tree 1386 * @nodeoffset: node to update 1387 */ 1388 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1389 { 1390 /* see if there is a phandle already */ 1391 int phandle = fdt_get_phandle(fdt, nodeoffset); 1392 1393 /* if we got 0, means no phandle so create one */ 1394 if (phandle == 0) { 1395 int ret; 1396 1397 phandle = fdt_alloc_phandle(fdt); 1398 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1399 if (ret < 0) { 1400 printf("Can't set phandle %u: %s\n", phandle, 1401 fdt_strerror(ret)); 1402 return 0; 1403 } 1404 } 1405 1406 return phandle; 1407 } 1408 1409 /* 1410 * fdt_set_node_status: Set status for the given node 1411 * 1412 * @fdt: ptr to device tree 1413 * @nodeoffset: node to update 1414 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1415 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1416 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1417 */ 1418 int fdt_set_node_status(void *fdt, int nodeoffset, 1419 enum fdt_status status, unsigned int error_code) 1420 { 1421 char buf[16]; 1422 int ret = 0; 1423 1424 if (nodeoffset < 0) 1425 return nodeoffset; 1426 1427 switch (status) { 1428 case FDT_STATUS_OKAY: 1429 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1430 break; 1431 case FDT_STATUS_DISABLED: 1432 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1433 break; 1434 case FDT_STATUS_FAIL: 1435 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1436 break; 1437 case FDT_STATUS_FAIL_ERROR_CODE: 1438 sprintf(buf, "fail-%d", error_code); 1439 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1440 break; 1441 default: 1442 printf("Invalid fdt status: %x\n", status); 1443 ret = -1; 1444 break; 1445 } 1446 1447 return ret; 1448 } 1449 1450 /* 1451 * fdt_set_status_by_alias: Set status for the given node given an alias 1452 * 1453 * @fdt: ptr to device tree 1454 * @alias: alias of node to update 1455 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1456 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1457 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1458 */ 1459 int fdt_set_status_by_alias(void *fdt, const char* alias, 1460 enum fdt_status status, unsigned int error_code) 1461 { 1462 int offset = fdt_path_offset(fdt, alias); 1463 1464 return fdt_set_node_status(fdt, offset, status, error_code); 1465 } 1466 1467 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1468 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1469 { 1470 int noff; 1471 int ret; 1472 1473 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1474 if (noff != -FDT_ERR_NOTFOUND) { 1475 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1476 add_edid: 1477 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1478 if (ret == -FDT_ERR_NOSPACE) { 1479 ret = fdt_increase_size(blob, 512); 1480 if (!ret) 1481 goto add_edid; 1482 else 1483 goto err_size; 1484 } else if (ret < 0) { 1485 printf("Can't add property: %s\n", fdt_strerror(ret)); 1486 return ret; 1487 } 1488 } 1489 return 0; 1490 err_size: 1491 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1492 return ret; 1493 } 1494 #endif 1495 1496 /* 1497 * Verify the physical address of device tree node for a given alias 1498 * 1499 * This function locates the device tree node of a given alias, and then 1500 * verifies that the physical address of that device matches the given 1501 * parameter. It displays a message if there is a mismatch. 1502 * 1503 * Returns 1 on success, 0 on failure 1504 */ 1505 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1506 { 1507 const char *path; 1508 const fdt32_t *reg; 1509 int node, len; 1510 u64 dt_addr; 1511 1512 path = fdt_getprop(fdt, anode, alias, NULL); 1513 if (!path) { 1514 /* If there's no such alias, then it's not a failure */ 1515 return 1; 1516 } 1517 1518 node = fdt_path_offset(fdt, path); 1519 if (node < 0) { 1520 printf("Warning: device tree alias '%s' points to invalid " 1521 "node %s.\n", alias, path); 1522 return 0; 1523 } 1524 1525 reg = fdt_getprop(fdt, node, "reg", &len); 1526 if (!reg) { 1527 printf("Warning: device tree node '%s' has no address.\n", 1528 path); 1529 return 0; 1530 } 1531 1532 dt_addr = fdt_translate_address(fdt, node, reg); 1533 if (addr != dt_addr) { 1534 printf("Warning: U-Boot configured device %s at address %" 1535 PRIx64 ",\n but the device tree has it address %" 1536 PRIx64 ".\n", alias, addr, dt_addr); 1537 return 0; 1538 } 1539 1540 return 1; 1541 } 1542 1543 /* 1544 * Returns the base address of an SOC or PCI node 1545 */ 1546 u64 fdt_get_base_address(const void *fdt, int node) 1547 { 1548 int size; 1549 const fdt32_t *prop; 1550 1551 prop = fdt_getprop(fdt, node, "reg", &size); 1552 1553 return prop ? fdt_translate_address(fdt, node, prop) : 0; 1554 } 1555 1556 /* 1557 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1558 */ 1559 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1560 uint64_t *val, int cells) 1561 { 1562 const fdt32_t *prop32 = &prop[cell_off]; 1563 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1564 1565 if ((cell_off + cells) > prop_len) 1566 return -FDT_ERR_NOSPACE; 1567 1568 switch (cells) { 1569 case 1: 1570 *val = fdt32_to_cpu(*prop32); 1571 break; 1572 case 2: 1573 *val = fdt64_to_cpu(*prop64); 1574 break; 1575 default: 1576 return -FDT_ERR_NOSPACE; 1577 } 1578 1579 return 0; 1580 } 1581 1582 /** 1583 * fdt_read_range - Read a node's n'th range property 1584 * 1585 * @fdt: ptr to device tree 1586 * @node: offset of node 1587 * @n: range index 1588 * @child_addr: pointer to storage for the "child address" field 1589 * @addr: pointer to storage for the CPU view translated physical start 1590 * @len: pointer to storage for the range length 1591 * 1592 * Convenience function that reads and interprets a specific range out of 1593 * a number of the "ranges" property array. 1594 */ 1595 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1596 uint64_t *addr, uint64_t *len) 1597 { 1598 int pnode = fdt_parent_offset(fdt, node); 1599 const fdt32_t *ranges; 1600 int pacells; 1601 int acells; 1602 int scells; 1603 int ranges_len; 1604 int cell = 0; 1605 int r = 0; 1606 1607 /* 1608 * The "ranges" property is an array of 1609 * { <child address> <parent address> <size in child address space> } 1610 * 1611 * All 3 elements can span a diffent number of cells. Fetch their size. 1612 */ 1613 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1614 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1615 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1616 1617 /* Now try to get the ranges property */ 1618 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1619 if (!ranges) 1620 return -FDT_ERR_NOTFOUND; 1621 ranges_len /= sizeof(uint32_t); 1622 1623 /* Jump to the n'th entry */ 1624 cell = n * (pacells + acells + scells); 1625 1626 /* Read <child address> */ 1627 if (child_addr) { 1628 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1629 acells); 1630 if (r) 1631 return r; 1632 } 1633 cell += acells; 1634 1635 /* Read <parent address> */ 1636 if (addr) 1637 *addr = fdt_translate_address(fdt, node, ranges + cell); 1638 cell += pacells; 1639 1640 /* Read <size in child address space> */ 1641 if (len) { 1642 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1643 if (r) 1644 return r; 1645 } 1646 1647 return 0; 1648 } 1649 1650 /** 1651 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1652 * 1653 * @fdt: ptr to device tree 1654 * @node: offset of the simplefb node 1655 * @base_address: framebuffer base address 1656 * @width: width in pixels 1657 * @height: height in pixels 1658 * @stride: bytes per line 1659 * @format: pixel format string 1660 * 1661 * Convenience function to fill and enable a simplefb node. 1662 */ 1663 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1664 u32 height, u32 stride, const char *format) 1665 { 1666 char name[32]; 1667 fdt32_t cells[4]; 1668 int i, addrc, sizec, ret; 1669 1670 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1671 &addrc, &sizec); 1672 i = 0; 1673 if (addrc == 2) 1674 cells[i++] = cpu_to_fdt32(base_address >> 32); 1675 cells[i++] = cpu_to_fdt32(base_address); 1676 if (sizec == 2) 1677 cells[i++] = 0; 1678 cells[i++] = cpu_to_fdt32(height * stride); 1679 1680 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1681 if (ret < 0) 1682 return ret; 1683 1684 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1685 ret = fdt_set_name(fdt, node, name); 1686 if (ret < 0) 1687 return ret; 1688 1689 ret = fdt_setprop_u32(fdt, node, "width", width); 1690 if (ret < 0) 1691 return ret; 1692 1693 ret = fdt_setprop_u32(fdt, node, "height", height); 1694 if (ret < 0) 1695 return ret; 1696 1697 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1698 if (ret < 0) 1699 return ret; 1700 1701 ret = fdt_setprop_string(fdt, node, "format", format); 1702 if (ret < 0) 1703 return ret; 1704 1705 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1706 if (ret < 0) 1707 return ret; 1708 1709 return 0; 1710 } 1711 1712 /* 1713 * Update native-mode in display-timings from display environment variable. 1714 * The node to update are specified by path. 1715 */ 1716 int fdt_fixup_display(void *blob, const char *path, const char *display) 1717 { 1718 int off, toff; 1719 1720 if (!display || !path) 1721 return -FDT_ERR_NOTFOUND; 1722 1723 toff = fdt_path_offset(blob, path); 1724 if (toff >= 0) 1725 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1726 if (toff < 0) 1727 return toff; 1728 1729 for (off = fdt_first_subnode(blob, toff); 1730 off >= 0; 1731 off = fdt_next_subnode(blob, off)) { 1732 uint32_t h = fdt_get_phandle(blob, off); 1733 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1734 fdt32_to_cpu(h)); 1735 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1736 return fdt_setprop_u32(blob, toff, "native-mode", h); 1737 } 1738 return toff; 1739 } 1740 1741 #ifdef CONFIG_OF_LIBFDT_OVERLAY 1742 /** 1743 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting 1744 * 1745 * @fdt: ptr to device tree 1746 * @fdto: ptr to device tree overlay 1747 * 1748 * Convenience function to apply an overlay and display helpful messages 1749 * in the case of an error 1750 */ 1751 int fdt_overlay_apply_verbose(void *fdt, void *fdto) 1752 { 1753 int err; 1754 bool has_symbols; 1755 1756 err = fdt_path_offset(fdt, "/__symbols__"); 1757 has_symbols = err >= 0; 1758 1759 err = fdt_overlay_apply(fdt, fdto); 1760 if (err < 0) { 1761 printf("failed on fdt_overlay_apply(): %s\n", 1762 fdt_strerror(err)); 1763 if (!has_symbols) { 1764 printf("base fdt does did not have a /__symbols__ node\n"); 1765 printf("make sure you've compiled with -@\n"); 1766 } 1767 } 1768 return err; 1769 } 1770 #endif 1771