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 void fdt_fill_multisername(char *sername, size_t maxlen) 135 { 136 const char *outname = stdio_devices[stdout]->name; 137 138 if (strcmp(outname, "serial") > 0) 139 strncpy(sername, outname, maxlen); 140 141 /* eserial? */ 142 if (strcmp(outname + 1, "serial") > 0) 143 strncpy(sername, outname + 1, maxlen); 144 } 145 146 static int fdt_fixup_stdout(void *fdt, int chosenoff) 147 { 148 int err; 149 int aliasoff; 150 char sername[9] = { 0 }; 151 const void *path; 152 int len; 153 char tmp[256]; /* long enough */ 154 155 fdt_fill_multisername(sername, sizeof(sername) - 1); 156 if (!sername[0]) 157 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 158 159 aliasoff = fdt_path_offset(fdt, "/aliases"); 160 if (aliasoff < 0) { 161 err = aliasoff; 162 goto noalias; 163 } 164 165 path = fdt_getprop(fdt, aliasoff, sername, &len); 166 if (!path) { 167 err = len; 168 goto noalias; 169 } 170 171 /* fdt_setprop may break "path" so we copy it to tmp buffer */ 172 memcpy(tmp, path, len); 173 174 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); 175 if (err < 0) 176 printf("WARNING: could not set linux,stdout-path %s.\n", 177 fdt_strerror(err)); 178 179 return err; 180 181 noalias: 182 printf("WARNING: %s: could not read %s alias: %s\n", 183 __func__, sername, fdt_strerror(err)); 184 185 return 0; 186 } 187 #else 188 static int fdt_fixup_stdout(void *fdt, int chosenoff) 189 { 190 return 0; 191 } 192 #endif 193 194 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, 195 uint64_t val, int is_u64) 196 { 197 if (is_u64) 198 return fdt_setprop_u64(fdt, nodeoffset, name, val); 199 else 200 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); 201 } 202 203 int fdt_root(void *fdt) 204 { 205 char *serial; 206 int err; 207 208 err = fdt_check_header(fdt); 209 if (err < 0) { 210 printf("fdt_root: %s\n", fdt_strerror(err)); 211 return err; 212 } 213 214 serial = getenv("serial#"); 215 if (serial) { 216 err = fdt_setprop(fdt, 0, "serial-number", serial, 217 strlen(serial) + 1); 218 219 if (err < 0) { 220 printf("WARNING: could not set serial-number %s.\n", 221 fdt_strerror(err)); 222 return err; 223 } 224 } 225 226 return 0; 227 } 228 229 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) 230 { 231 int nodeoffset; 232 int err, j, total; 233 int is_u64; 234 uint64_t addr, size; 235 236 /* just return if the size of initrd is zero */ 237 if (initrd_start == initrd_end) 238 return 0; 239 240 /* find or create "/chosen" node. */ 241 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 242 if (nodeoffset < 0) 243 return nodeoffset; 244 245 total = fdt_num_mem_rsv(fdt); 246 247 /* 248 * Look for an existing entry and update it. If we don't find 249 * the entry, we will j be the next available slot. 250 */ 251 for (j = 0; j < total; j++) { 252 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 253 if (addr == initrd_start) { 254 fdt_del_mem_rsv(fdt, j); 255 break; 256 } 257 } 258 259 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 260 if (err < 0) { 261 printf("fdt_initrd: %s\n", fdt_strerror(err)); 262 return err; 263 } 264 265 is_u64 = (fdt_address_cells(fdt, 0) == 2); 266 267 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", 268 (uint64_t)initrd_start, is_u64); 269 270 if (err < 0) { 271 printf("WARNING: could not set linux,initrd-start %s.\n", 272 fdt_strerror(err)); 273 return err; 274 } 275 276 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", 277 (uint64_t)initrd_end, is_u64); 278 279 if (err < 0) { 280 printf("WARNING: could not set linux,initrd-end %s.\n", 281 fdt_strerror(err)); 282 283 return err; 284 } 285 286 return 0; 287 } 288 289 int fdt_chosen(void *fdt) 290 { 291 int nodeoffset; 292 int err; 293 char *str; /* used to set string properties */ 294 295 err = fdt_check_header(fdt); 296 if (err < 0) { 297 printf("fdt_chosen: %s\n", fdt_strerror(err)); 298 return err; 299 } 300 301 /* find or create "/chosen" node. */ 302 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 303 if (nodeoffset < 0) 304 return nodeoffset; 305 306 str = getenv("bootargs"); 307 if (str) { 308 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 309 strlen(str) + 1); 310 if (err < 0) { 311 printf("WARNING: could not set bootargs %s.\n", 312 fdt_strerror(err)); 313 return err; 314 } 315 } 316 317 return fdt_fixup_stdout(fdt, nodeoffset); 318 } 319 320 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 321 const void *val, int len, int create) 322 { 323 #if defined(DEBUG) 324 int i; 325 debug("Updating property '%s/%s' = ", path, prop); 326 for (i = 0; i < len; i++) 327 debug(" %.2x", *(u8*)(val+i)); 328 debug("\n"); 329 #endif 330 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 331 if (rc) 332 printf("Unable to update property %s:%s, err=%s\n", 333 path, prop, fdt_strerror(rc)); 334 } 335 336 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 337 u32 val, int create) 338 { 339 fdt32_t tmp = cpu_to_fdt32(val); 340 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 341 } 342 343 void do_fixup_by_prop(void *fdt, 344 const char *pname, const void *pval, int plen, 345 const char *prop, const void *val, int len, 346 int create) 347 { 348 int off; 349 #if defined(DEBUG) 350 int i; 351 debug("Updating property '%s' = ", prop); 352 for (i = 0; i < len; i++) 353 debug(" %.2x", *(u8*)(val+i)); 354 debug("\n"); 355 #endif 356 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 357 while (off != -FDT_ERR_NOTFOUND) { 358 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 359 fdt_setprop(fdt, off, prop, val, len); 360 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 361 } 362 } 363 364 void do_fixup_by_prop_u32(void *fdt, 365 const char *pname, const void *pval, int plen, 366 const char *prop, u32 val, int create) 367 { 368 fdt32_t tmp = cpu_to_fdt32(val); 369 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 370 } 371 372 void do_fixup_by_compat(void *fdt, const char *compat, 373 const char *prop, const void *val, int len, int create) 374 { 375 int off = -1; 376 #if defined(DEBUG) 377 int i; 378 debug("Updating property '%s' = ", prop); 379 for (i = 0; i < len; i++) 380 debug(" %.2x", *(u8*)(val+i)); 381 debug("\n"); 382 #endif 383 off = fdt_node_offset_by_compatible(fdt, -1, compat); 384 while (off != -FDT_ERR_NOTFOUND) { 385 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 386 fdt_setprop(fdt, off, prop, val, len); 387 off = fdt_node_offset_by_compatible(fdt, off, compat); 388 } 389 } 390 391 void do_fixup_by_compat_u32(void *fdt, const char *compat, 392 const char *prop, u32 val, int create) 393 { 394 fdt32_t tmp = cpu_to_fdt32(val); 395 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 396 } 397 398 /* 399 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 400 */ 401 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 402 int n) 403 { 404 int i; 405 int address_cells = fdt_address_cells(fdt, 0); 406 int size_cells = fdt_size_cells(fdt, 0); 407 char *p = buf; 408 409 for (i = 0; i < n; i++) { 410 if (address_cells == 2) 411 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 412 else 413 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 414 p += 4 * address_cells; 415 416 if (size_cells == 2) 417 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 418 else 419 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 420 p += 4 * size_cells; 421 } 422 423 return p - (char *)buf; 424 } 425 426 #ifdef CONFIG_NR_DRAM_BANKS 427 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 428 #else 429 #define MEMORY_BANKS_MAX 4 430 #endif 431 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 432 { 433 int err, nodeoffset; 434 int len; 435 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 436 437 if (banks > MEMORY_BANKS_MAX) { 438 printf("%s: num banks %d exceeds hardcoded limit %d." 439 " Recompile with higher MEMORY_BANKS_MAX?\n", 440 __FUNCTION__, banks, MEMORY_BANKS_MAX); 441 return -1; 442 } 443 444 err = fdt_check_header(blob); 445 if (err < 0) { 446 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 447 return err; 448 } 449 450 /* find or create "/memory" node. */ 451 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 452 if (nodeoffset < 0) 453 return nodeoffset; 454 455 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 456 sizeof("memory")); 457 if (err < 0) { 458 printf("WARNING: could not set %s %s.\n", "device_type", 459 fdt_strerror(err)); 460 return err; 461 } 462 463 if (!banks) 464 return 0; 465 466 len = fdt_pack_reg(blob, tmp, start, size, banks); 467 468 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 469 if (err < 0) { 470 printf("WARNING: could not set %s %s.\n", 471 "reg", fdt_strerror(err)); 472 return err; 473 } 474 return 0; 475 } 476 477 int fdt_fixup_memory(void *blob, u64 start, u64 size) 478 { 479 return fdt_fixup_memory_banks(blob, &start, &size, 1); 480 } 481 482 void fdt_fixup_ethernet(void *fdt) 483 { 484 int node, i, j; 485 char *tmp, *end; 486 char mac[16]; 487 const char *path; 488 unsigned char mac_addr[6]; 489 int offset; 490 491 node = fdt_path_offset(fdt, "/aliases"); 492 if (node < 0) 493 return; 494 495 for (offset = fdt_first_property_offset(fdt, node); 496 offset > 0; 497 offset = fdt_next_property_offset(fdt, offset)) { 498 const char *name; 499 int len = strlen("ethernet"); 500 501 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 502 if (!strncmp(name, "ethernet", len)) { 503 i = trailing_strtol(name); 504 if (i != -1) { 505 if (i == 0) 506 strcpy(mac, "ethaddr"); 507 else 508 sprintf(mac, "eth%daddr", i); 509 } else { 510 continue; 511 } 512 tmp = getenv(mac); 513 if (!tmp) 514 continue; 515 516 for (j = 0; j < 6; j++) { 517 mac_addr[j] = tmp ? 518 simple_strtoul(tmp, &end, 16) : 0; 519 if (tmp) 520 tmp = (*end) ? end + 1 : end; 521 } 522 523 do_fixup_by_path(fdt, path, "mac-address", 524 &mac_addr, 6, 0); 525 do_fixup_by_path(fdt, path, "local-mac-address", 526 &mac_addr, 6, 1); 527 } 528 } 529 } 530 531 /* Resize the fdt to its actual size + a bit of padding */ 532 int fdt_shrink_to_minimum(void *blob) 533 { 534 int i; 535 uint64_t addr, size; 536 int total, ret; 537 uint actualsize; 538 539 if (!blob) 540 return 0; 541 542 total = fdt_num_mem_rsv(blob); 543 for (i = 0; i < total; i++) { 544 fdt_get_mem_rsv(blob, i, &addr, &size); 545 if (addr == (uintptr_t)blob) { 546 fdt_del_mem_rsv(blob, i); 547 break; 548 } 549 } 550 551 /* 552 * Calculate the actual size of the fdt 553 * plus the size needed for 5 fdt_add_mem_rsv, one 554 * for the fdt itself and 4 for a possible initrd 555 * ((initrd-start + initrd-end) * 2 (name & value)) 556 */ 557 actualsize = fdt_off_dt_strings(blob) + 558 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 559 560 /* Make it so the fdt ends on a page boundary */ 561 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 562 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 563 564 /* Change the fdt header to reflect the correct size */ 565 fdt_set_totalsize(blob, actualsize); 566 567 /* Add the new reservation */ 568 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 569 if (ret < 0) 570 return ret; 571 572 return actualsize; 573 } 574 575 #ifdef CONFIG_PCI 576 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 577 578 #define FDT_PCI_PREFETCH (0x40000000) 579 #define FDT_PCI_MEM32 (0x02000000) 580 #define FDT_PCI_IO (0x01000000) 581 #define FDT_PCI_MEM64 (0x03000000) 582 583 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 584 585 int addrcell, sizecell, len, r; 586 u32 *dma_range; 587 /* sized based on pci addr cells, size-cells, & address-cells */ 588 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 589 590 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 591 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 592 593 dma_range = &dma_ranges[0]; 594 for (r = 0; r < hose->region_count; r++) { 595 u64 bus_start, phys_start, size; 596 597 /* skip if !PCI_REGION_SYS_MEMORY */ 598 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 599 continue; 600 601 bus_start = (u64)hose->regions[r].bus_start; 602 phys_start = (u64)hose->regions[r].phys_start; 603 size = (u64)hose->regions[r].size; 604 605 dma_range[0] = 0; 606 if (size >= 0x100000000ull) 607 dma_range[0] |= FDT_PCI_MEM64; 608 else 609 dma_range[0] |= FDT_PCI_MEM32; 610 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 611 dma_range[0] |= FDT_PCI_PREFETCH; 612 #ifdef CONFIG_SYS_PCI_64BIT 613 dma_range[1] = bus_start >> 32; 614 #else 615 dma_range[1] = 0; 616 #endif 617 dma_range[2] = bus_start & 0xffffffff; 618 619 if (addrcell == 2) { 620 dma_range[3] = phys_start >> 32; 621 dma_range[4] = phys_start & 0xffffffff; 622 } else { 623 dma_range[3] = phys_start & 0xffffffff; 624 } 625 626 if (sizecell == 2) { 627 dma_range[3 + addrcell + 0] = size >> 32; 628 dma_range[3 + addrcell + 1] = size & 0xffffffff; 629 } else { 630 dma_range[3 + addrcell + 0] = size & 0xffffffff; 631 } 632 633 dma_range += (3 + addrcell + sizecell); 634 } 635 636 len = dma_range - &dma_ranges[0]; 637 if (len) 638 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 639 640 return 0; 641 } 642 #endif 643 644 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE 645 /* 646 * Provide a weak default function to return the flash bank size. 647 * There might be multiple non-identical flash chips connected to one 648 * chip-select, so we need to pass an index as well. 649 */ 650 u32 __flash_get_bank_size(int cs, int idx) 651 { 652 extern flash_info_t flash_info[]; 653 654 /* 655 * As default, a simple 1:1 mapping is provided. Boards with 656 * a different mapping need to supply a board specific mapping 657 * routine. 658 */ 659 return flash_info[cs].size; 660 } 661 u32 flash_get_bank_size(int cs, int idx) 662 __attribute__((weak, alias("__flash_get_bank_size"))); 663 664 /* 665 * This function can be used to update the size in the "reg" property 666 * of all NOR FLASH device nodes. This is necessary for boards with 667 * non-fixed NOR FLASH sizes. 668 */ 669 int fdt_fixup_nor_flash_size(void *blob) 670 { 671 char compat[][16] = { "cfi-flash", "jedec-flash" }; 672 int off; 673 int len; 674 struct fdt_property *prop; 675 u32 *reg, *reg2; 676 int i; 677 678 for (i = 0; i < 2; i++) { 679 off = fdt_node_offset_by_compatible(blob, -1, compat[i]); 680 while (off != -FDT_ERR_NOTFOUND) { 681 int idx; 682 683 /* 684 * Found one compatible node, so fixup the size 685 * int its reg properties 686 */ 687 prop = fdt_get_property_w(blob, off, "reg", &len); 688 if (prop) { 689 int tuple_size = 3 * sizeof(reg); 690 691 /* 692 * There might be multiple reg-tuples, 693 * so loop through them all 694 */ 695 reg = reg2 = (u32 *)&prop->data[0]; 696 for (idx = 0; idx < (len / tuple_size); idx++) { 697 /* 698 * Update size in reg property 699 */ 700 reg[2] = flash_get_bank_size(reg[0], 701 idx); 702 703 /* 704 * Point to next reg tuple 705 */ 706 reg += 3; 707 } 708 709 fdt_setprop(blob, off, "reg", reg2, len); 710 } 711 712 /* Move to next compatible node */ 713 off = fdt_node_offset_by_compatible(blob, off, 714 compat[i]); 715 } 716 } 717 718 return 0; 719 } 720 #endif 721 722 int fdt_increase_size(void *fdt, int add_len) 723 { 724 int newlen; 725 726 newlen = fdt_totalsize(fdt) + add_len; 727 728 /* Open in place with a new len */ 729 return fdt_open_into(fdt, fdt, newlen); 730 } 731 732 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 733 #include <jffs2/load_kernel.h> 734 #include <mtd_node.h> 735 736 struct reg_cell { 737 unsigned int r0; 738 unsigned int r1; 739 }; 740 741 int fdt_del_subnodes(const void *blob, int parent_offset) 742 { 743 int off, ndepth; 744 int ret; 745 746 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 747 (off >= 0) && (ndepth > 0); 748 off = fdt_next_node(blob, off, &ndepth)) { 749 if (ndepth == 1) { 750 debug("delete %s: offset: %x\n", 751 fdt_get_name(blob, off, 0), off); 752 ret = fdt_del_node((void *)blob, off); 753 if (ret < 0) { 754 printf("Can't delete node: %s\n", 755 fdt_strerror(ret)); 756 return ret; 757 } else { 758 ndepth = 0; 759 off = parent_offset; 760 } 761 } 762 } 763 return 0; 764 } 765 766 int fdt_del_partitions(void *blob, int parent_offset) 767 { 768 const void *prop; 769 int ndepth = 0; 770 int off; 771 int ret; 772 773 off = fdt_next_node(blob, parent_offset, &ndepth); 774 if (off > 0 && ndepth == 1) { 775 prop = fdt_getprop(blob, off, "label", NULL); 776 if (prop == NULL) { 777 /* 778 * Could not find label property, nand {}; node? 779 * Check subnode, delete partitions there if any. 780 */ 781 return fdt_del_partitions(blob, off); 782 } else { 783 ret = fdt_del_subnodes(blob, parent_offset); 784 if (ret < 0) { 785 printf("Can't remove subnodes: %s\n", 786 fdt_strerror(ret)); 787 return ret; 788 } 789 } 790 } 791 return 0; 792 } 793 794 int fdt_node_set_part_info(void *blob, int parent_offset, 795 struct mtd_device *dev) 796 { 797 struct list_head *pentry; 798 struct part_info *part; 799 struct reg_cell cell; 800 int off, ndepth = 0; 801 int part_num, ret; 802 char buf[64]; 803 804 ret = fdt_del_partitions(blob, parent_offset); 805 if (ret < 0) 806 return ret; 807 808 /* 809 * Check if it is nand {}; subnode, adjust 810 * the offset in this case 811 */ 812 off = fdt_next_node(blob, parent_offset, &ndepth); 813 if (off > 0 && ndepth == 1) 814 parent_offset = off; 815 816 part_num = 0; 817 list_for_each_prev(pentry, &dev->parts) { 818 int newoff; 819 820 part = list_entry(pentry, struct part_info, link); 821 822 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 823 part_num, part->name, part->size, 824 part->offset, part->mask_flags); 825 826 sprintf(buf, "partition@%llx", part->offset); 827 add_sub: 828 ret = fdt_add_subnode(blob, parent_offset, buf); 829 if (ret == -FDT_ERR_NOSPACE) { 830 ret = fdt_increase_size(blob, 512); 831 if (!ret) 832 goto add_sub; 833 else 834 goto err_size; 835 } else if (ret < 0) { 836 printf("Can't add partition node: %s\n", 837 fdt_strerror(ret)); 838 return ret; 839 } 840 newoff = ret; 841 842 /* Check MTD_WRITEABLE_CMD flag */ 843 if (part->mask_flags & 1) { 844 add_ro: 845 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 846 if (ret == -FDT_ERR_NOSPACE) { 847 ret = fdt_increase_size(blob, 512); 848 if (!ret) 849 goto add_ro; 850 else 851 goto err_size; 852 } else if (ret < 0) 853 goto err_prop; 854 } 855 856 cell.r0 = cpu_to_fdt32(part->offset); 857 cell.r1 = cpu_to_fdt32(part->size); 858 add_reg: 859 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 860 if (ret == -FDT_ERR_NOSPACE) { 861 ret = fdt_increase_size(blob, 512); 862 if (!ret) 863 goto add_reg; 864 else 865 goto err_size; 866 } else if (ret < 0) 867 goto err_prop; 868 869 add_label: 870 ret = fdt_setprop_string(blob, newoff, "label", part->name); 871 if (ret == -FDT_ERR_NOSPACE) { 872 ret = fdt_increase_size(blob, 512); 873 if (!ret) 874 goto add_label; 875 else 876 goto err_size; 877 } else if (ret < 0) 878 goto err_prop; 879 880 part_num++; 881 } 882 return 0; 883 err_size: 884 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 885 return ret; 886 err_prop: 887 printf("Can't add property: %s\n", fdt_strerror(ret)); 888 return ret; 889 } 890 891 /* 892 * Update partitions in nor/nand nodes using info from 893 * mtdparts environment variable. The nodes to update are 894 * specified by node_info structure which contains mtd device 895 * type and compatible string: E. g. the board code in 896 * ft_board_setup() could use: 897 * 898 * struct node_info nodes[] = { 899 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 900 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 901 * }; 902 * 903 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 904 */ 905 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 906 { 907 struct node_info *ni = node_info; 908 struct mtd_device *dev; 909 char *parts; 910 int i, idx; 911 int noff; 912 913 parts = getenv("mtdparts"); 914 if (!parts) 915 return; 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) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS) 958 959 /* Debug utility */ 960 #ifdef DEBUG 961 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 962 { 963 printf("%s", s); 964 while(na--) 965 printf(" %08x", *(addr++)); 966 printf("\n"); 967 } 968 #else 969 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 970 #endif 971 972 /* Callbacks for bus specific translators */ 973 struct of_bus { 974 const char *name; 975 const char *addresses; 976 void (*count_cells)(void *blob, int parentoffset, 977 int *addrc, int *sizec); 978 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 979 int na, int ns, int pna); 980 int (*translate)(fdt32_t *addr, u64 offset, int na); 981 }; 982 983 /* Default translator (generic bus) */ 984 void of_bus_default_count_cells(void *blob, int parentoffset, 985 int *addrc, int *sizec) 986 { 987 const fdt32_t *prop; 988 989 if (addrc) 990 *addrc = fdt_address_cells(blob, parentoffset); 991 992 if (sizec) { 993 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 994 if (prop) 995 *sizec = be32_to_cpup(prop); 996 else 997 *sizec = 1; 998 } 999 } 1000 1001 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1002 int na, int ns, int pna) 1003 { 1004 u64 cp, s, da; 1005 1006 cp = of_read_number(range, na); 1007 s = of_read_number(range + na + pna, ns); 1008 da = of_read_number(addr, na); 1009 1010 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 1011 ", da=%" PRIu64 "\n", cp, s, da); 1012 1013 if (da < cp || da >= (cp + s)) 1014 return OF_BAD_ADDR; 1015 return da - cp; 1016 } 1017 1018 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1019 { 1020 u64 a = of_read_number(addr, na); 1021 memset(addr, 0, na * 4); 1022 a += offset; 1023 if (na > 1) 1024 addr[na - 2] = cpu_to_fdt32(a >> 32); 1025 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1026 1027 return 0; 1028 } 1029 1030 /* Array of bus specific translators */ 1031 static struct of_bus of_busses[] = { 1032 /* Default */ 1033 { 1034 .name = "default", 1035 .addresses = "reg", 1036 .count_cells = of_bus_default_count_cells, 1037 .map = of_bus_default_map, 1038 .translate = of_bus_default_translate, 1039 }, 1040 }; 1041 1042 static int of_translate_one(void * blob, int parent, struct of_bus *bus, 1043 struct of_bus *pbus, fdt32_t *addr, 1044 int na, int ns, int pna, const char *rprop) 1045 { 1046 const fdt32_t *ranges; 1047 int rlen; 1048 int rone; 1049 u64 offset = OF_BAD_ADDR; 1050 1051 /* Normally, an absence of a "ranges" property means we are 1052 * crossing a non-translatable boundary, and thus the addresses 1053 * below the current not cannot be converted to CPU physical ones. 1054 * Unfortunately, while this is very clear in the spec, it's not 1055 * what Apple understood, and they do have things like /uni-n or 1056 * /ht nodes with no "ranges" property and a lot of perfectly 1057 * useable mapped devices below them. Thus we treat the absence of 1058 * "ranges" as equivalent to an empty "ranges" property which means 1059 * a 1:1 translation at that level. It's up to the caller not to try 1060 * to translate addresses that aren't supposed to be translated in 1061 * the first place. --BenH. 1062 */ 1063 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1064 if (ranges == NULL || rlen == 0) { 1065 offset = of_read_number(addr, na); 1066 memset(addr, 0, pna * 4); 1067 debug("OF: no ranges, 1:1 translation\n"); 1068 goto finish; 1069 } 1070 1071 debug("OF: walking ranges...\n"); 1072 1073 /* Now walk through the ranges */ 1074 rlen /= 4; 1075 rone = na + pna + ns; 1076 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1077 offset = bus->map(addr, ranges, na, ns, pna); 1078 if (offset != OF_BAD_ADDR) 1079 break; 1080 } 1081 if (offset == OF_BAD_ADDR) { 1082 debug("OF: not found !\n"); 1083 return 1; 1084 } 1085 memcpy(addr, ranges + na, 4 * pna); 1086 1087 finish: 1088 of_dump_addr("OF: parent translation for:", addr, pna); 1089 debug("OF: with offset: %" PRIu64 "\n", offset); 1090 1091 /* Translate it into parent bus space */ 1092 return pbus->translate(addr, offset, pna); 1093 } 1094 1095 /* 1096 * Translate an address from the device-tree into a CPU physical address, 1097 * this walks up the tree and applies the various bus mappings on the 1098 * way. 1099 * 1100 * Note: We consider that crossing any level with #size-cells == 0 to mean 1101 * that translation is impossible (that is we are not dealing with a value 1102 * that can be mapped to a cpu physical address). This is not really specified 1103 * that way, but this is traditionally the way IBM at least do things 1104 */ 1105 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr, 1106 const char *rprop) 1107 { 1108 int parent; 1109 struct of_bus *bus, *pbus; 1110 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1111 int na, ns, pna, pns; 1112 u64 result = OF_BAD_ADDR; 1113 1114 debug("OF: ** translation for device %s **\n", 1115 fdt_get_name(blob, node_offset, NULL)); 1116 1117 /* Get parent & match bus type */ 1118 parent = fdt_parent_offset(blob, node_offset); 1119 if (parent < 0) 1120 goto bail; 1121 bus = &of_busses[0]; 1122 1123 /* Cound address cells & copy address locally */ 1124 bus->count_cells(blob, parent, &na, &ns); 1125 if (!OF_CHECK_COUNTS(na)) { 1126 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1127 fdt_get_name(blob, node_offset, NULL)); 1128 goto bail; 1129 } 1130 memcpy(addr, in_addr, na * 4); 1131 1132 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1133 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1134 of_dump_addr("OF: translating address:", addr, na); 1135 1136 /* Translate */ 1137 for (;;) { 1138 /* Switch to parent bus */ 1139 node_offset = parent; 1140 parent = fdt_parent_offset(blob, node_offset); 1141 1142 /* If root, we have finished */ 1143 if (parent < 0) { 1144 debug("OF: reached root node\n"); 1145 result = of_read_number(addr, na); 1146 break; 1147 } 1148 1149 /* Get new parent bus and counts */ 1150 pbus = &of_busses[0]; 1151 pbus->count_cells(blob, parent, &pna, &pns); 1152 if (!OF_CHECK_COUNTS(pna)) { 1153 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1154 fdt_get_name(blob, node_offset, NULL)); 1155 break; 1156 } 1157 1158 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1159 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1160 1161 /* Apply bus translation */ 1162 if (of_translate_one(blob, node_offset, bus, pbus, 1163 addr, na, ns, pna, rprop)) 1164 break; 1165 1166 /* Complete the move up one level */ 1167 na = pna; 1168 ns = pns; 1169 bus = pbus; 1170 1171 of_dump_addr("OF: one level translation:", addr, na); 1172 } 1173 bail: 1174 1175 return result; 1176 } 1177 1178 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr) 1179 { 1180 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1181 } 1182 1183 /** 1184 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1185 * who's reg property matches a physical cpu address 1186 * 1187 * @blob: ptr to device tree 1188 * @compat: compatiable string to match 1189 * @compat_off: property name 1190 * 1191 */ 1192 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1193 phys_addr_t compat_off) 1194 { 1195 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1196 while (off != -FDT_ERR_NOTFOUND) { 1197 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1198 if (reg) { 1199 if (compat_off == fdt_translate_address(blob, off, reg)) 1200 return off; 1201 } 1202 off = fdt_node_offset_by_compatible(blob, off, compat); 1203 } 1204 1205 return -FDT_ERR_NOTFOUND; 1206 } 1207 1208 /** 1209 * fdt_alloc_phandle: Return next free phandle value 1210 * 1211 * @blob: ptr to device tree 1212 */ 1213 int fdt_alloc_phandle(void *blob) 1214 { 1215 int offset; 1216 uint32_t phandle = 0; 1217 1218 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1219 offset = fdt_next_node(blob, offset, NULL)) { 1220 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1221 } 1222 1223 return phandle + 1; 1224 } 1225 1226 /* 1227 * fdt_set_phandle: Create a phandle property for the given node 1228 * 1229 * @fdt: ptr to device tree 1230 * @nodeoffset: node to update 1231 * @phandle: phandle value to set (must be unique) 1232 */ 1233 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1234 { 1235 int ret; 1236 1237 #ifdef DEBUG 1238 int off = fdt_node_offset_by_phandle(fdt, phandle); 1239 1240 if ((off >= 0) && (off != nodeoffset)) { 1241 char buf[64]; 1242 1243 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1244 printf("Trying to update node %s with phandle %u ", 1245 buf, phandle); 1246 1247 fdt_get_path(fdt, off, buf, sizeof(buf)); 1248 printf("that already exists in node %s.\n", buf); 1249 return -FDT_ERR_BADPHANDLE; 1250 } 1251 #endif 1252 1253 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1254 if (ret < 0) 1255 return ret; 1256 1257 /* 1258 * For now, also set the deprecated "linux,phandle" property, so that we 1259 * don't break older kernels. 1260 */ 1261 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1262 1263 return ret; 1264 } 1265 1266 /* 1267 * fdt_create_phandle: Create a phandle property for the given node 1268 * 1269 * @fdt: ptr to device tree 1270 * @nodeoffset: node to update 1271 */ 1272 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1273 { 1274 /* see if there is a phandle already */ 1275 int phandle = fdt_get_phandle(fdt, nodeoffset); 1276 1277 /* if we got 0, means no phandle so create one */ 1278 if (phandle == 0) { 1279 int ret; 1280 1281 phandle = fdt_alloc_phandle(fdt); 1282 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1283 if (ret < 0) { 1284 printf("Can't set phandle %u: %s\n", phandle, 1285 fdt_strerror(ret)); 1286 return 0; 1287 } 1288 } 1289 1290 return phandle; 1291 } 1292 1293 /* 1294 * fdt_set_node_status: Set status for the given node 1295 * 1296 * @fdt: ptr to device tree 1297 * @nodeoffset: node to update 1298 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1299 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1300 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1301 */ 1302 int fdt_set_node_status(void *fdt, int nodeoffset, 1303 enum fdt_status status, unsigned int error_code) 1304 { 1305 char buf[16]; 1306 int ret = 0; 1307 1308 if (nodeoffset < 0) 1309 return nodeoffset; 1310 1311 switch (status) { 1312 case FDT_STATUS_OKAY: 1313 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1314 break; 1315 case FDT_STATUS_DISABLED: 1316 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1317 break; 1318 case FDT_STATUS_FAIL: 1319 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1320 break; 1321 case FDT_STATUS_FAIL_ERROR_CODE: 1322 sprintf(buf, "fail-%d", error_code); 1323 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1324 break; 1325 default: 1326 printf("Invalid fdt status: %x\n", status); 1327 ret = -1; 1328 break; 1329 } 1330 1331 return ret; 1332 } 1333 1334 /* 1335 * fdt_set_status_by_alias: Set status for the given node given an alias 1336 * 1337 * @fdt: ptr to device tree 1338 * @alias: alias of node to update 1339 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1340 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1341 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1342 */ 1343 int fdt_set_status_by_alias(void *fdt, const char* alias, 1344 enum fdt_status status, unsigned int error_code) 1345 { 1346 int offset = fdt_path_offset(fdt, alias); 1347 1348 return fdt_set_node_status(fdt, offset, status, error_code); 1349 } 1350 1351 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1352 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1353 { 1354 int noff; 1355 int ret; 1356 1357 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1358 if (noff != -FDT_ERR_NOTFOUND) { 1359 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1360 add_edid: 1361 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1362 if (ret == -FDT_ERR_NOSPACE) { 1363 ret = fdt_increase_size(blob, 512); 1364 if (!ret) 1365 goto add_edid; 1366 else 1367 goto err_size; 1368 } else if (ret < 0) { 1369 printf("Can't add property: %s\n", fdt_strerror(ret)); 1370 return ret; 1371 } 1372 } 1373 return 0; 1374 err_size: 1375 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1376 return ret; 1377 } 1378 #endif 1379 1380 /* 1381 * Verify the physical address of device tree node for a given alias 1382 * 1383 * This function locates the device tree node of a given alias, and then 1384 * verifies that the physical address of that device matches the given 1385 * parameter. It displays a message if there is a mismatch. 1386 * 1387 * Returns 1 on success, 0 on failure 1388 */ 1389 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1390 { 1391 const char *path; 1392 const fdt32_t *reg; 1393 int node, len; 1394 u64 dt_addr; 1395 1396 path = fdt_getprop(fdt, anode, alias, NULL); 1397 if (!path) { 1398 /* If there's no such alias, then it's not a failure */ 1399 return 1; 1400 } 1401 1402 node = fdt_path_offset(fdt, path); 1403 if (node < 0) { 1404 printf("Warning: device tree alias '%s' points to invalid " 1405 "node %s.\n", alias, path); 1406 return 0; 1407 } 1408 1409 reg = fdt_getprop(fdt, node, "reg", &len); 1410 if (!reg) { 1411 printf("Warning: device tree node '%s' has no address.\n", 1412 path); 1413 return 0; 1414 } 1415 1416 dt_addr = fdt_translate_address(fdt, node, reg); 1417 if (addr != dt_addr) { 1418 printf("Warning: U-Boot configured device %s at address %" 1419 PRIx64 ",\n but the device tree has it address %" 1420 PRIx64 ".\n", alias, addr, dt_addr); 1421 return 0; 1422 } 1423 1424 return 1; 1425 } 1426 1427 /* 1428 * Returns the base address of an SOC or PCI node 1429 */ 1430 u64 fdt_get_base_address(void *fdt, int node) 1431 { 1432 int size; 1433 u32 naddr; 1434 const fdt32_t *prop; 1435 1436 naddr = fdt_address_cells(fdt, node); 1437 1438 prop = fdt_getprop(fdt, node, "ranges", &size); 1439 1440 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0; 1441 } 1442 1443 /* 1444 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1445 */ 1446 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1447 uint64_t *val, int cells) 1448 { 1449 const fdt32_t *prop32 = &prop[cell_off]; 1450 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1451 1452 if ((cell_off + cells) > prop_len) 1453 return -FDT_ERR_NOSPACE; 1454 1455 switch (cells) { 1456 case 1: 1457 *val = fdt32_to_cpu(*prop32); 1458 break; 1459 case 2: 1460 *val = fdt64_to_cpu(*prop64); 1461 break; 1462 default: 1463 return -FDT_ERR_NOSPACE; 1464 } 1465 1466 return 0; 1467 } 1468 1469 /** 1470 * fdt_read_range - Read a node's n'th range property 1471 * 1472 * @fdt: ptr to device tree 1473 * @node: offset of node 1474 * @n: range index 1475 * @child_addr: pointer to storage for the "child address" field 1476 * @addr: pointer to storage for the CPU view translated physical start 1477 * @len: pointer to storage for the range length 1478 * 1479 * Convenience function that reads and interprets a specific range out of 1480 * a number of the "ranges" property array. 1481 */ 1482 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1483 uint64_t *addr, uint64_t *len) 1484 { 1485 int pnode = fdt_parent_offset(fdt, node); 1486 const fdt32_t *ranges; 1487 int pacells; 1488 int acells; 1489 int scells; 1490 int ranges_len; 1491 int cell = 0; 1492 int r = 0; 1493 1494 /* 1495 * The "ranges" property is an array of 1496 * { <child address> <parent address> <size in child address space> } 1497 * 1498 * All 3 elements can span a diffent number of cells. Fetch their size. 1499 */ 1500 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1501 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1502 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1503 1504 /* Now try to get the ranges property */ 1505 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1506 if (!ranges) 1507 return -FDT_ERR_NOTFOUND; 1508 ranges_len /= sizeof(uint32_t); 1509 1510 /* Jump to the n'th entry */ 1511 cell = n * (pacells + acells + scells); 1512 1513 /* Read <child address> */ 1514 if (child_addr) { 1515 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1516 acells); 1517 if (r) 1518 return r; 1519 } 1520 cell += acells; 1521 1522 /* Read <parent address> */ 1523 if (addr) 1524 *addr = fdt_translate_address(fdt, node, ranges + cell); 1525 cell += pacells; 1526 1527 /* Read <size in child address space> */ 1528 if (len) { 1529 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1530 if (r) 1531 return r; 1532 } 1533 1534 return 0; 1535 } 1536 1537 /** 1538 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1539 * 1540 * @fdt: ptr to device tree 1541 * @node: offset of the simplefb node 1542 * @base_address: framebuffer base address 1543 * @width: width in pixels 1544 * @height: height in pixels 1545 * @stride: bytes per line 1546 * @format: pixel format string 1547 * 1548 * Convenience function to fill and enable a simplefb node. 1549 */ 1550 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1551 u32 height, u32 stride, const char *format) 1552 { 1553 char name[32]; 1554 fdt32_t cells[4]; 1555 int i, addrc, sizec, ret; 1556 1557 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1558 &addrc, &sizec); 1559 i = 0; 1560 if (addrc == 2) 1561 cells[i++] = cpu_to_fdt32(base_address >> 32); 1562 cells[i++] = cpu_to_fdt32(base_address); 1563 if (sizec == 2) 1564 cells[i++] = 0; 1565 cells[i++] = cpu_to_fdt32(height * stride); 1566 1567 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1568 if (ret < 0) 1569 return ret; 1570 1571 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1572 ret = fdt_set_name(fdt, node, name); 1573 if (ret < 0) 1574 return ret; 1575 1576 ret = fdt_setprop_u32(fdt, node, "width", width); 1577 if (ret < 0) 1578 return ret; 1579 1580 ret = fdt_setprop_u32(fdt, node, "height", height); 1581 if (ret < 0) 1582 return ret; 1583 1584 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1585 if (ret < 0) 1586 return ret; 1587 1588 ret = fdt_setprop_string(fdt, node, "format", format); 1589 if (ret < 0) 1590 return ret; 1591 1592 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1593 if (ret < 0) 1594 return ret; 1595 1596 return 0; 1597 } 1598 1599 /* 1600 * Update native-mode in display-timings from display environment variable. 1601 * The node to update are specified by path. 1602 */ 1603 int fdt_fixup_display(void *blob, const char *path, const char *display) 1604 { 1605 int off, toff; 1606 1607 if (!display || !path) 1608 return -FDT_ERR_NOTFOUND; 1609 1610 toff = fdt_path_offset(blob, path); 1611 if (toff >= 0) 1612 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1613 if (toff < 0) 1614 return toff; 1615 1616 for (off = fdt_first_subnode(blob, toff); 1617 off >= 0; 1618 off = fdt_next_subnode(blob, off)) { 1619 uint32_t h = fdt_get_phandle(blob, off); 1620 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1621 fdt32_to_cpu(h)); 1622 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1623 return fdt_setprop_u32(blob, toff, "native-mode", h); 1624 } 1625 return toff; 1626 } 1627