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 20 /** 21 * fdt_getprop_u32_default_node - Return a node's property or a default 22 * 23 * @fdt: ptr to device tree 24 * @off: offset of node 25 * @cell: cell offset in property 26 * @prop: property name 27 * @dflt: default value if the property isn't found 28 * 29 * Convenience function to return a node's property or a default value if 30 * the property doesn't exist. 31 */ 32 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, 33 const char *prop, const u32 dflt) 34 { 35 const fdt32_t *val; 36 int len; 37 38 val = fdt_getprop(fdt, off, prop, &len); 39 40 /* Check if property exists */ 41 if (!val) 42 return dflt; 43 44 /* Check if property is long enough */ 45 if (len < ((cell + 1) * sizeof(uint32_t))) 46 return dflt; 47 48 return fdt32_to_cpu(*val); 49 } 50 51 /** 52 * fdt_getprop_u32_default - Find a node and return it's property or a default 53 * 54 * @fdt: ptr to device tree 55 * @path: path of node 56 * @prop: property name 57 * @dflt: default value if the property isn't found 58 * 59 * Convenience function to find a node and return it's property or a 60 * default value if it doesn't exist. 61 */ 62 u32 fdt_getprop_u32_default(const void *fdt, const char *path, 63 const char *prop, const u32 dflt) 64 { 65 int off; 66 67 off = fdt_path_offset(fdt, path); 68 if (off < 0) 69 return dflt; 70 71 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); 72 } 73 74 /** 75 * fdt_find_and_setprop: Find a node and set it's property 76 * 77 * @fdt: ptr to device tree 78 * @node: path of node 79 * @prop: property name 80 * @val: ptr to new value 81 * @len: length of new property value 82 * @create: flag to create the property if it doesn't exist 83 * 84 * Convenience function to directly set a property given the path to the node. 85 */ 86 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 87 const void *val, int len, int create) 88 { 89 int nodeoff = fdt_path_offset(fdt, node); 90 91 if (nodeoff < 0) 92 return nodeoff; 93 94 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) 95 return 0; /* create flag not set; so exit quietly */ 96 97 return fdt_setprop(fdt, nodeoff, prop, val, len); 98 } 99 100 /** 101 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node 102 * 103 * @fdt: pointer to the device tree blob 104 * @parentoffset: structure block offset of a node 105 * @name: name of the subnode to locate 106 * 107 * fdt_subnode_offset() finds a subnode of the node with a given name. 108 * If the subnode does not exist, it will be created. 109 */ 110 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) 111 { 112 int offset; 113 114 offset = fdt_subnode_offset(fdt, parentoffset, name); 115 116 if (offset == -FDT_ERR_NOTFOUND) 117 offset = fdt_add_subnode(fdt, parentoffset, name); 118 119 if (offset < 0) 120 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset)); 121 122 return offset; 123 } 124 125 /* rename to CONFIG_OF_STDOUT_PATH ? */ 126 #if defined(OF_STDOUT_PATH) 127 static int fdt_fixup_stdout(void *fdt, int chosenoff) 128 { 129 return fdt_setprop(fdt, chosenoff, "linux,stdout-path", 130 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); 131 } 132 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) 133 static void fdt_fill_multisername(char *sername, size_t maxlen) 134 { 135 const char *outname = stdio_devices[stdout]->name; 136 137 if (strcmp(outname, "serial") > 0) 138 strncpy(sername, outname, maxlen); 139 140 /* eserial? */ 141 if (strcmp(outname + 1, "serial") > 0) 142 strncpy(sername, outname + 1, maxlen); 143 } 144 145 static int fdt_fixup_stdout(void *fdt, int chosenoff) 146 { 147 int err; 148 int aliasoff; 149 char sername[9] = { 0 }; 150 const void *path; 151 int len; 152 char tmp[256]; /* long enough */ 153 154 fdt_fill_multisername(sername, sizeof(sername) - 1); 155 if (!sername[0]) 156 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 157 158 aliasoff = fdt_path_offset(fdt, "/aliases"); 159 if (aliasoff < 0) { 160 err = aliasoff; 161 goto error; 162 } 163 164 path = fdt_getprop(fdt, aliasoff, sername, &len); 165 if (!path) { 166 err = len; 167 goto error; 168 } 169 170 /* fdt_setprop may break "path" so we copy it to tmp buffer */ 171 memcpy(tmp, path, len); 172 173 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); 174 error: 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 #else 182 static int fdt_fixup_stdout(void *fdt, int chosenoff) 183 { 184 return 0; 185 } 186 #endif 187 188 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, 189 uint64_t val, int is_u64) 190 { 191 if (is_u64) 192 return fdt_setprop_u64(fdt, nodeoffset, name, val); 193 else 194 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); 195 } 196 197 198 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) 199 { 200 int nodeoffset; 201 int err, j, total; 202 int is_u64; 203 uint64_t addr, size; 204 205 /* just return if the size of initrd is zero */ 206 if (initrd_start == initrd_end) 207 return 0; 208 209 /* find or create "/chosen" node. */ 210 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 211 if (nodeoffset < 0) 212 return nodeoffset; 213 214 total = fdt_num_mem_rsv(fdt); 215 216 /* 217 * Look for an existing entry and update it. If we don't find 218 * the entry, we will j be the next available slot. 219 */ 220 for (j = 0; j < total; j++) { 221 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 222 if (addr == initrd_start) { 223 fdt_del_mem_rsv(fdt, j); 224 break; 225 } 226 } 227 228 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 229 if (err < 0) { 230 printf("fdt_initrd: %s\n", fdt_strerror(err)); 231 return err; 232 } 233 234 is_u64 = (fdt_address_cells(fdt, 0) == 2); 235 236 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", 237 (uint64_t)initrd_start, is_u64); 238 239 if (err < 0) { 240 printf("WARNING: could not set linux,initrd-start %s.\n", 241 fdt_strerror(err)); 242 return err; 243 } 244 245 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", 246 (uint64_t)initrd_end, is_u64); 247 248 if (err < 0) { 249 printf("WARNING: could not set linux,initrd-end %s.\n", 250 fdt_strerror(err)); 251 252 return err; 253 } 254 255 return 0; 256 } 257 258 int fdt_chosen(void *fdt) 259 { 260 int nodeoffset; 261 int err; 262 char *str; /* used to set string properties */ 263 264 err = fdt_check_header(fdt); 265 if (err < 0) { 266 printf("fdt_chosen: %s\n", fdt_strerror(err)); 267 return err; 268 } 269 270 /* find or create "/chosen" node. */ 271 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 272 if (nodeoffset < 0) 273 return nodeoffset; 274 275 str = getenv("bootargs"); 276 if (str) { 277 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 278 strlen(str) + 1); 279 if (err < 0) { 280 printf("WARNING: could not set bootargs %s.\n", 281 fdt_strerror(err)); 282 return err; 283 } 284 } 285 286 return fdt_fixup_stdout(fdt, nodeoffset); 287 } 288 289 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 290 const void *val, int len, int create) 291 { 292 #if defined(DEBUG) 293 int i; 294 debug("Updating property '%s/%s' = ", path, prop); 295 for (i = 0; i < len; i++) 296 debug(" %.2x", *(u8*)(val+i)); 297 debug("\n"); 298 #endif 299 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 300 if (rc) 301 printf("Unable to update property %s:%s, err=%s\n", 302 path, prop, fdt_strerror(rc)); 303 } 304 305 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 306 u32 val, int create) 307 { 308 fdt32_t tmp = cpu_to_fdt32(val); 309 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 310 } 311 312 void do_fixup_by_prop(void *fdt, 313 const char *pname, const void *pval, int plen, 314 const char *prop, const void *val, int len, 315 int create) 316 { 317 int off; 318 #if defined(DEBUG) 319 int i; 320 debug("Updating property '%s' = ", prop); 321 for (i = 0; i < len; i++) 322 debug(" %.2x", *(u8*)(val+i)); 323 debug("\n"); 324 #endif 325 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 326 while (off != -FDT_ERR_NOTFOUND) { 327 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 328 fdt_setprop(fdt, off, prop, val, len); 329 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 330 } 331 } 332 333 void do_fixup_by_prop_u32(void *fdt, 334 const char *pname, const void *pval, int plen, 335 const char *prop, u32 val, int create) 336 { 337 fdt32_t tmp = cpu_to_fdt32(val); 338 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 339 } 340 341 void do_fixup_by_compat(void *fdt, const char *compat, 342 const char *prop, const void *val, int len, int create) 343 { 344 int off = -1; 345 #if defined(DEBUG) 346 int i; 347 debug("Updating property '%s' = ", prop); 348 for (i = 0; i < len; i++) 349 debug(" %.2x", *(u8*)(val+i)); 350 debug("\n"); 351 #endif 352 off = fdt_node_offset_by_compatible(fdt, -1, compat); 353 while (off != -FDT_ERR_NOTFOUND) { 354 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 355 fdt_setprop(fdt, off, prop, val, len); 356 off = fdt_node_offset_by_compatible(fdt, off, compat); 357 } 358 } 359 360 void do_fixup_by_compat_u32(void *fdt, const char *compat, 361 const char *prop, u32 val, int create) 362 { 363 fdt32_t tmp = cpu_to_fdt32(val); 364 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 365 } 366 367 /* 368 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 369 */ 370 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 371 int n) 372 { 373 int i; 374 int address_cells = fdt_address_cells(fdt, 0); 375 int size_cells = fdt_size_cells(fdt, 0); 376 char *p = buf; 377 378 for (i = 0; i < n; i++) { 379 if (address_cells == 2) 380 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 381 else 382 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 383 p += 4 * address_cells; 384 385 if (size_cells == 2) 386 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 387 else 388 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 389 p += 4 * size_cells; 390 } 391 392 return p - (char *)buf; 393 } 394 395 #ifdef CONFIG_NR_DRAM_BANKS 396 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 397 #else 398 #define MEMORY_BANKS_MAX 4 399 #endif 400 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 401 { 402 int err, nodeoffset; 403 int len; 404 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 405 406 if (banks > MEMORY_BANKS_MAX) { 407 printf("%s: num banks %d exceeds hardcoded limit %d." 408 " Recompile with higher MEMORY_BANKS_MAX?\n", 409 __FUNCTION__, banks, MEMORY_BANKS_MAX); 410 return -1; 411 } 412 413 err = fdt_check_header(blob); 414 if (err < 0) { 415 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 416 return err; 417 } 418 419 /* find or create "/memory" node. */ 420 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 421 if (nodeoffset < 0) 422 return nodeoffset; 423 424 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 425 sizeof("memory")); 426 if (err < 0) { 427 printf("WARNING: could not set %s %s.\n", "device_type", 428 fdt_strerror(err)); 429 return err; 430 } 431 432 len = fdt_pack_reg(blob, tmp, start, size, banks); 433 434 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 435 if (err < 0) { 436 printf("WARNING: could not set %s %s.\n", 437 "reg", fdt_strerror(err)); 438 return err; 439 } 440 return 0; 441 } 442 443 int fdt_fixup_memory(void *blob, u64 start, u64 size) 444 { 445 return fdt_fixup_memory_banks(blob, &start, &size, 1); 446 } 447 448 void fdt_fixup_ethernet(void *fdt) 449 { 450 int node, i, j; 451 char enet[16], *tmp, *end; 452 char mac[16]; 453 const char *path; 454 unsigned char mac_addr[6]; 455 456 node = fdt_path_offset(fdt, "/aliases"); 457 if (node < 0) 458 return; 459 460 if (!getenv("ethaddr")) { 461 if (getenv("usbethaddr")) { 462 strcpy(mac, "usbethaddr"); 463 } else { 464 debug("No ethernet MAC Address defined\n"); 465 return; 466 } 467 } else { 468 strcpy(mac, "ethaddr"); 469 } 470 471 i = 0; 472 while ((tmp = getenv(mac)) != NULL) { 473 sprintf(enet, "ethernet%d", i); 474 path = fdt_getprop(fdt, node, enet, NULL); 475 if (!path) { 476 debug("No alias for %s\n", enet); 477 sprintf(mac, "eth%daddr", ++i); 478 continue; 479 } 480 481 for (j = 0; j < 6; j++) { 482 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0; 483 if (tmp) 484 tmp = (*end) ? end+1 : end; 485 } 486 487 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0); 488 do_fixup_by_path(fdt, path, "local-mac-address", 489 &mac_addr, 6, 1); 490 491 sprintf(mac, "eth%daddr", ++i); 492 } 493 } 494 495 /* Resize the fdt to its actual size + a bit of padding */ 496 int fdt_shrink_to_minimum(void *blob) 497 { 498 int i; 499 uint64_t addr, size; 500 int total, ret; 501 uint actualsize; 502 503 if (!blob) 504 return 0; 505 506 total = fdt_num_mem_rsv(blob); 507 for (i = 0; i < total; i++) { 508 fdt_get_mem_rsv(blob, i, &addr, &size); 509 if (addr == (uintptr_t)blob) { 510 fdt_del_mem_rsv(blob, i); 511 break; 512 } 513 } 514 515 /* 516 * Calculate the actual size of the fdt 517 * plus the size needed for 5 fdt_add_mem_rsv, one 518 * for the fdt itself and 4 for a possible initrd 519 * ((initrd-start + initrd-end) * 2 (name & value)) 520 */ 521 actualsize = fdt_off_dt_strings(blob) + 522 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 523 524 /* Make it so the fdt ends on a page boundary */ 525 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 526 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 527 528 /* Change the fdt header to reflect the correct size */ 529 fdt_set_totalsize(blob, actualsize); 530 531 /* Add the new reservation */ 532 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 533 if (ret < 0) 534 return ret; 535 536 return actualsize; 537 } 538 539 #ifdef CONFIG_PCI 540 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 541 542 #define FDT_PCI_PREFETCH (0x40000000) 543 #define FDT_PCI_MEM32 (0x02000000) 544 #define FDT_PCI_IO (0x01000000) 545 #define FDT_PCI_MEM64 (0x03000000) 546 547 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 548 549 int addrcell, sizecell, len, r; 550 u32 *dma_range; 551 /* sized based on pci addr cells, size-cells, & address-cells */ 552 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 553 554 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 555 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 556 557 dma_range = &dma_ranges[0]; 558 for (r = 0; r < hose->region_count; r++) { 559 u64 bus_start, phys_start, size; 560 561 /* skip if !PCI_REGION_SYS_MEMORY */ 562 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 563 continue; 564 565 bus_start = (u64)hose->regions[r].bus_start; 566 phys_start = (u64)hose->regions[r].phys_start; 567 size = (u64)hose->regions[r].size; 568 569 dma_range[0] = 0; 570 if (size >= 0x100000000ull) 571 dma_range[0] |= FDT_PCI_MEM64; 572 else 573 dma_range[0] |= FDT_PCI_MEM32; 574 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 575 dma_range[0] |= FDT_PCI_PREFETCH; 576 #ifdef CONFIG_SYS_PCI_64BIT 577 dma_range[1] = bus_start >> 32; 578 #else 579 dma_range[1] = 0; 580 #endif 581 dma_range[2] = bus_start & 0xffffffff; 582 583 if (addrcell == 2) { 584 dma_range[3] = phys_start >> 32; 585 dma_range[4] = phys_start & 0xffffffff; 586 } else { 587 dma_range[3] = phys_start & 0xffffffff; 588 } 589 590 if (sizecell == 2) { 591 dma_range[3 + addrcell + 0] = size >> 32; 592 dma_range[3 + addrcell + 1] = size & 0xffffffff; 593 } else { 594 dma_range[3 + addrcell + 0] = size & 0xffffffff; 595 } 596 597 dma_range += (3 + addrcell + sizecell); 598 } 599 600 len = dma_range - &dma_ranges[0]; 601 if (len) 602 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 603 604 return 0; 605 } 606 #endif 607 608 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE 609 /* 610 * Provide a weak default function to return the flash bank size. 611 * There might be multiple non-identical flash chips connected to one 612 * chip-select, so we need to pass an index as well. 613 */ 614 u32 __flash_get_bank_size(int cs, int idx) 615 { 616 extern flash_info_t flash_info[]; 617 618 /* 619 * As default, a simple 1:1 mapping is provided. Boards with 620 * a different mapping need to supply a board specific mapping 621 * routine. 622 */ 623 return flash_info[cs].size; 624 } 625 u32 flash_get_bank_size(int cs, int idx) 626 __attribute__((weak, alias("__flash_get_bank_size"))); 627 628 /* 629 * This function can be used to update the size in the "reg" property 630 * of all NOR FLASH device nodes. This is necessary for boards with 631 * non-fixed NOR FLASH sizes. 632 */ 633 int fdt_fixup_nor_flash_size(void *blob) 634 { 635 char compat[][16] = { "cfi-flash", "jedec-flash" }; 636 int off; 637 int len; 638 struct fdt_property *prop; 639 u32 *reg, *reg2; 640 int i; 641 642 for (i = 0; i < 2; i++) { 643 off = fdt_node_offset_by_compatible(blob, -1, compat[i]); 644 while (off != -FDT_ERR_NOTFOUND) { 645 int idx; 646 647 /* 648 * Found one compatible node, so fixup the size 649 * int its reg properties 650 */ 651 prop = fdt_get_property_w(blob, off, "reg", &len); 652 if (prop) { 653 int tuple_size = 3 * sizeof(reg); 654 655 /* 656 * There might be multiple reg-tuples, 657 * so loop through them all 658 */ 659 reg = reg2 = (u32 *)&prop->data[0]; 660 for (idx = 0; idx < (len / tuple_size); idx++) { 661 /* 662 * Update size in reg property 663 */ 664 reg[2] = flash_get_bank_size(reg[0], 665 idx); 666 667 /* 668 * Point to next reg tuple 669 */ 670 reg += 3; 671 } 672 673 fdt_setprop(blob, off, "reg", reg2, len); 674 } 675 676 /* Move to next compatible node */ 677 off = fdt_node_offset_by_compatible(blob, off, 678 compat[i]); 679 } 680 } 681 682 return 0; 683 } 684 #endif 685 686 int fdt_increase_size(void *fdt, int add_len) 687 { 688 int newlen; 689 690 newlen = fdt_totalsize(fdt) + add_len; 691 692 /* Open in place with a new len */ 693 return fdt_open_into(fdt, fdt, newlen); 694 } 695 696 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 697 #include <jffs2/load_kernel.h> 698 #include <mtd_node.h> 699 700 struct reg_cell { 701 unsigned int r0; 702 unsigned int r1; 703 }; 704 705 int fdt_del_subnodes(const void *blob, int parent_offset) 706 { 707 int off, ndepth; 708 int ret; 709 710 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 711 (off >= 0) && (ndepth > 0); 712 off = fdt_next_node(blob, off, &ndepth)) { 713 if (ndepth == 1) { 714 debug("delete %s: offset: %x\n", 715 fdt_get_name(blob, off, 0), off); 716 ret = fdt_del_node((void *)blob, off); 717 if (ret < 0) { 718 printf("Can't delete node: %s\n", 719 fdt_strerror(ret)); 720 return ret; 721 } else { 722 ndepth = 0; 723 off = parent_offset; 724 } 725 } 726 } 727 return 0; 728 } 729 730 int fdt_del_partitions(void *blob, int parent_offset) 731 { 732 const void *prop; 733 int ndepth = 0; 734 int off; 735 int ret; 736 737 off = fdt_next_node(blob, parent_offset, &ndepth); 738 if (off > 0 && ndepth == 1) { 739 prop = fdt_getprop(blob, off, "label", NULL); 740 if (prop == NULL) { 741 /* 742 * Could not find label property, nand {}; node? 743 * Check subnode, delete partitions there if any. 744 */ 745 return fdt_del_partitions(blob, off); 746 } else { 747 ret = fdt_del_subnodes(blob, parent_offset); 748 if (ret < 0) { 749 printf("Can't remove subnodes: %s\n", 750 fdt_strerror(ret)); 751 return ret; 752 } 753 } 754 } 755 return 0; 756 } 757 758 int fdt_node_set_part_info(void *blob, int parent_offset, 759 struct mtd_device *dev) 760 { 761 struct list_head *pentry; 762 struct part_info *part; 763 struct reg_cell cell; 764 int off, ndepth = 0; 765 int part_num, ret; 766 char buf[64]; 767 768 ret = fdt_del_partitions(blob, parent_offset); 769 if (ret < 0) 770 return ret; 771 772 /* 773 * Check if it is nand {}; subnode, adjust 774 * the offset in this case 775 */ 776 off = fdt_next_node(blob, parent_offset, &ndepth); 777 if (off > 0 && ndepth == 1) 778 parent_offset = off; 779 780 part_num = 0; 781 list_for_each_prev(pentry, &dev->parts) { 782 int newoff; 783 784 part = list_entry(pentry, struct part_info, link); 785 786 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 787 part_num, part->name, part->size, 788 part->offset, part->mask_flags); 789 790 sprintf(buf, "partition@%llx", part->offset); 791 add_sub: 792 ret = fdt_add_subnode(blob, parent_offset, buf); 793 if (ret == -FDT_ERR_NOSPACE) { 794 ret = fdt_increase_size(blob, 512); 795 if (!ret) 796 goto add_sub; 797 else 798 goto err_size; 799 } else if (ret < 0) { 800 printf("Can't add partition node: %s\n", 801 fdt_strerror(ret)); 802 return ret; 803 } 804 newoff = ret; 805 806 /* Check MTD_WRITEABLE_CMD flag */ 807 if (part->mask_flags & 1) { 808 add_ro: 809 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 810 if (ret == -FDT_ERR_NOSPACE) { 811 ret = fdt_increase_size(blob, 512); 812 if (!ret) 813 goto add_ro; 814 else 815 goto err_size; 816 } else if (ret < 0) 817 goto err_prop; 818 } 819 820 cell.r0 = cpu_to_fdt32(part->offset); 821 cell.r1 = cpu_to_fdt32(part->size); 822 add_reg: 823 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 824 if (ret == -FDT_ERR_NOSPACE) { 825 ret = fdt_increase_size(blob, 512); 826 if (!ret) 827 goto add_reg; 828 else 829 goto err_size; 830 } else if (ret < 0) 831 goto err_prop; 832 833 add_label: 834 ret = fdt_setprop_string(blob, newoff, "label", part->name); 835 if (ret == -FDT_ERR_NOSPACE) { 836 ret = fdt_increase_size(blob, 512); 837 if (!ret) 838 goto add_label; 839 else 840 goto err_size; 841 } else if (ret < 0) 842 goto err_prop; 843 844 part_num++; 845 } 846 return 0; 847 err_size: 848 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 849 return ret; 850 err_prop: 851 printf("Can't add property: %s\n", fdt_strerror(ret)); 852 return ret; 853 } 854 855 /* 856 * Update partitions in nor/nand nodes using info from 857 * mtdparts environment variable. The nodes to update are 858 * specified by node_info structure which contains mtd device 859 * type and compatible string: E. g. the board code in 860 * ft_board_setup() could use: 861 * 862 * struct node_info nodes[] = { 863 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 864 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 865 * }; 866 * 867 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 868 */ 869 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 870 { 871 struct node_info *ni = node_info; 872 struct mtd_device *dev; 873 char *parts; 874 int i, idx; 875 int noff; 876 877 parts = getenv("mtdparts"); 878 if (!parts) 879 return; 880 881 if (mtdparts_init() != 0) 882 return; 883 884 for (i = 0; i < node_info_size; i++) { 885 idx = 0; 886 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 887 while (noff != -FDT_ERR_NOTFOUND) { 888 debug("%s: %s, mtd dev type %d\n", 889 fdt_get_name(blob, noff, 0), 890 ni[i].compat, ni[i].type); 891 dev = device_find(ni[i].type, idx++); 892 if (dev) { 893 if (fdt_node_set_part_info(blob, noff, dev)) 894 return; /* return on error */ 895 } 896 897 /* Jump to next flash node */ 898 noff = fdt_node_offset_by_compatible(blob, noff, 899 ni[i].compat); 900 } 901 } 902 } 903 #endif 904 905 void fdt_del_node_and_alias(void *blob, const char *alias) 906 { 907 int off = fdt_path_offset(blob, alias); 908 909 if (off < 0) 910 return; 911 912 fdt_del_node(blob, off); 913 914 off = fdt_path_offset(blob, "/aliases"); 915 fdt_delprop(blob, off, alias); 916 } 917 918 /* Max address size we deal with */ 919 #define OF_MAX_ADDR_CELLS 4 920 #define OF_BAD_ADDR ((u64)-1) 921 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 922 (ns) > 0) 923 924 /* Debug utility */ 925 #ifdef DEBUG 926 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 927 { 928 printf("%s", s); 929 while(na--) 930 printf(" %08x", *(addr++)); 931 printf("\n"); 932 } 933 #else 934 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 935 #endif 936 937 /* Callbacks for bus specific translators */ 938 struct of_bus { 939 const char *name; 940 const char *addresses; 941 void (*count_cells)(void *blob, int parentoffset, 942 int *addrc, int *sizec); 943 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 944 int na, int ns, int pna); 945 int (*translate)(fdt32_t *addr, u64 offset, int na); 946 }; 947 948 /* Default translator (generic bus) */ 949 void of_bus_default_count_cells(void *blob, int parentoffset, 950 int *addrc, int *sizec) 951 { 952 const fdt32_t *prop; 953 954 if (addrc) 955 *addrc = fdt_address_cells(blob, parentoffset); 956 957 if (sizec) { 958 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 959 if (prop) 960 *sizec = be32_to_cpup(prop); 961 else 962 *sizec = 1; 963 } 964 } 965 966 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 967 int na, int ns, int pna) 968 { 969 u64 cp, s, da; 970 971 cp = of_read_number(range, na); 972 s = of_read_number(range + na + pna, ns); 973 da = of_read_number(addr, na); 974 975 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 976 ", da=%" PRIu64 "\n", cp, s, da); 977 978 if (da < cp || da >= (cp + s)) 979 return OF_BAD_ADDR; 980 return da - cp; 981 } 982 983 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 984 { 985 u64 a = of_read_number(addr, na); 986 memset(addr, 0, na * 4); 987 a += offset; 988 if (na > 1) 989 addr[na - 2] = cpu_to_fdt32(a >> 32); 990 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 991 992 return 0; 993 } 994 995 /* Array of bus specific translators */ 996 static struct of_bus of_busses[] = { 997 /* Default */ 998 { 999 .name = "default", 1000 .addresses = "reg", 1001 .count_cells = of_bus_default_count_cells, 1002 .map = of_bus_default_map, 1003 .translate = of_bus_default_translate, 1004 }, 1005 }; 1006 1007 static int of_translate_one(void * blob, int parent, struct of_bus *bus, 1008 struct of_bus *pbus, fdt32_t *addr, 1009 int na, int ns, int pna, const char *rprop) 1010 { 1011 const fdt32_t *ranges; 1012 int rlen; 1013 int rone; 1014 u64 offset = OF_BAD_ADDR; 1015 1016 /* Normally, an absence of a "ranges" property means we are 1017 * crossing a non-translatable boundary, and thus the addresses 1018 * below the current not cannot be converted to CPU physical ones. 1019 * Unfortunately, while this is very clear in the spec, it's not 1020 * what Apple understood, and they do have things like /uni-n or 1021 * /ht nodes with no "ranges" property and a lot of perfectly 1022 * useable mapped devices below them. Thus we treat the absence of 1023 * "ranges" as equivalent to an empty "ranges" property which means 1024 * a 1:1 translation at that level. It's up to the caller not to try 1025 * to translate addresses that aren't supposed to be translated in 1026 * the first place. --BenH. 1027 */ 1028 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1029 if (ranges == NULL || rlen == 0) { 1030 offset = of_read_number(addr, na); 1031 memset(addr, 0, pna * 4); 1032 debug("OF: no ranges, 1:1 translation\n"); 1033 goto finish; 1034 } 1035 1036 debug("OF: walking ranges...\n"); 1037 1038 /* Now walk through the ranges */ 1039 rlen /= 4; 1040 rone = na + pna + ns; 1041 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1042 offset = bus->map(addr, ranges, na, ns, pna); 1043 if (offset != OF_BAD_ADDR) 1044 break; 1045 } 1046 if (offset == OF_BAD_ADDR) { 1047 debug("OF: not found !\n"); 1048 return 1; 1049 } 1050 memcpy(addr, ranges + na, 4 * pna); 1051 1052 finish: 1053 of_dump_addr("OF: parent translation for:", addr, pna); 1054 debug("OF: with offset: %" PRIu64 "\n", offset); 1055 1056 /* Translate it into parent bus space */ 1057 return pbus->translate(addr, offset, pna); 1058 } 1059 1060 /* 1061 * Translate an address from the device-tree into a CPU physical address, 1062 * this walks up the tree and applies the various bus mappings on the 1063 * way. 1064 * 1065 * Note: We consider that crossing any level with #size-cells == 0 to mean 1066 * that translation is impossible (that is we are not dealing with a value 1067 * that can be mapped to a cpu physical address). This is not really specified 1068 * that way, but this is traditionally the way IBM at least do things 1069 */ 1070 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr, 1071 const char *rprop) 1072 { 1073 int parent; 1074 struct of_bus *bus, *pbus; 1075 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1076 int na, ns, pna, pns; 1077 u64 result = OF_BAD_ADDR; 1078 1079 debug("OF: ** translation for device %s **\n", 1080 fdt_get_name(blob, node_offset, NULL)); 1081 1082 /* Get parent & match bus type */ 1083 parent = fdt_parent_offset(blob, node_offset); 1084 if (parent < 0) 1085 goto bail; 1086 bus = &of_busses[0]; 1087 1088 /* Cound address cells & copy address locally */ 1089 bus->count_cells(blob, parent, &na, &ns); 1090 if (!OF_CHECK_COUNTS(na, ns)) { 1091 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1092 fdt_get_name(blob, node_offset, NULL)); 1093 goto bail; 1094 } 1095 memcpy(addr, in_addr, na * 4); 1096 1097 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1098 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1099 of_dump_addr("OF: translating address:", addr, na); 1100 1101 /* Translate */ 1102 for (;;) { 1103 /* Switch to parent bus */ 1104 node_offset = parent; 1105 parent = fdt_parent_offset(blob, node_offset); 1106 1107 /* If root, we have finished */ 1108 if (parent < 0) { 1109 debug("OF: reached root node\n"); 1110 result = of_read_number(addr, na); 1111 break; 1112 } 1113 1114 /* Get new parent bus and counts */ 1115 pbus = &of_busses[0]; 1116 pbus->count_cells(blob, parent, &pna, &pns); 1117 if (!OF_CHECK_COUNTS(pna, pns)) { 1118 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1119 fdt_get_name(blob, node_offset, NULL)); 1120 break; 1121 } 1122 1123 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1124 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1125 1126 /* Apply bus translation */ 1127 if (of_translate_one(blob, node_offset, bus, pbus, 1128 addr, na, ns, pna, rprop)) 1129 break; 1130 1131 /* Complete the move up one level */ 1132 na = pna; 1133 ns = pns; 1134 bus = pbus; 1135 1136 of_dump_addr("OF: one level translation:", addr, na); 1137 } 1138 bail: 1139 1140 return result; 1141 } 1142 1143 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr) 1144 { 1145 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1146 } 1147 1148 /** 1149 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1150 * who's reg property matches a physical cpu address 1151 * 1152 * @blob: ptr to device tree 1153 * @compat: compatiable string to match 1154 * @compat_off: property name 1155 * 1156 */ 1157 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1158 phys_addr_t compat_off) 1159 { 1160 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1161 while (off != -FDT_ERR_NOTFOUND) { 1162 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1163 if (reg) { 1164 if (compat_off == fdt_translate_address(blob, off, reg)) 1165 return off; 1166 } 1167 off = fdt_node_offset_by_compatible(blob, off, compat); 1168 } 1169 1170 return -FDT_ERR_NOTFOUND; 1171 } 1172 1173 /** 1174 * fdt_alloc_phandle: Return next free phandle value 1175 * 1176 * @blob: ptr to device tree 1177 */ 1178 int fdt_alloc_phandle(void *blob) 1179 { 1180 int offset; 1181 uint32_t phandle = 0; 1182 1183 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1184 offset = fdt_next_node(blob, offset, NULL)) { 1185 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1186 } 1187 1188 return phandle + 1; 1189 } 1190 1191 /* 1192 * fdt_set_phandle: Create a phandle property for the given node 1193 * 1194 * @fdt: ptr to device tree 1195 * @nodeoffset: node to update 1196 * @phandle: phandle value to set (must be unique) 1197 */ 1198 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1199 { 1200 int ret; 1201 1202 #ifdef DEBUG 1203 int off = fdt_node_offset_by_phandle(fdt, phandle); 1204 1205 if ((off >= 0) && (off != nodeoffset)) { 1206 char buf[64]; 1207 1208 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1209 printf("Trying to update node %s with phandle %u ", 1210 buf, phandle); 1211 1212 fdt_get_path(fdt, off, buf, sizeof(buf)); 1213 printf("that already exists in node %s.\n", buf); 1214 return -FDT_ERR_BADPHANDLE; 1215 } 1216 #endif 1217 1218 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1219 if (ret < 0) 1220 return ret; 1221 1222 /* 1223 * For now, also set the deprecated "linux,phandle" property, so that we 1224 * don't break older kernels. 1225 */ 1226 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1227 1228 return ret; 1229 } 1230 1231 /* 1232 * fdt_create_phandle: Create a phandle property for the given node 1233 * 1234 * @fdt: ptr to device tree 1235 * @nodeoffset: node to update 1236 */ 1237 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1238 { 1239 /* see if there is a phandle already */ 1240 int phandle = fdt_get_phandle(fdt, nodeoffset); 1241 1242 /* if we got 0, means no phandle so create one */ 1243 if (phandle == 0) { 1244 int ret; 1245 1246 phandle = fdt_alloc_phandle(fdt); 1247 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1248 if (ret < 0) { 1249 printf("Can't set phandle %u: %s\n", phandle, 1250 fdt_strerror(ret)); 1251 return 0; 1252 } 1253 } 1254 1255 return phandle; 1256 } 1257 1258 /* 1259 * fdt_set_node_status: Set status for the given node 1260 * 1261 * @fdt: ptr to device tree 1262 * @nodeoffset: node to update 1263 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1264 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1265 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1266 */ 1267 int fdt_set_node_status(void *fdt, int nodeoffset, 1268 enum fdt_status status, unsigned int error_code) 1269 { 1270 char buf[16]; 1271 int ret = 0; 1272 1273 if (nodeoffset < 0) 1274 return nodeoffset; 1275 1276 switch (status) { 1277 case FDT_STATUS_OKAY: 1278 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1279 break; 1280 case FDT_STATUS_DISABLED: 1281 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1282 break; 1283 case FDT_STATUS_FAIL: 1284 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1285 break; 1286 case FDT_STATUS_FAIL_ERROR_CODE: 1287 sprintf(buf, "fail-%d", error_code); 1288 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1289 break; 1290 default: 1291 printf("Invalid fdt status: %x\n", status); 1292 ret = -1; 1293 break; 1294 } 1295 1296 return ret; 1297 } 1298 1299 /* 1300 * fdt_set_status_by_alias: Set status for the given node given an alias 1301 * 1302 * @fdt: ptr to device tree 1303 * @alias: alias of node to update 1304 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1305 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1306 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1307 */ 1308 int fdt_set_status_by_alias(void *fdt, const char* alias, 1309 enum fdt_status status, unsigned int error_code) 1310 { 1311 int offset = fdt_path_offset(fdt, alias); 1312 1313 return fdt_set_node_status(fdt, offset, status, error_code); 1314 } 1315 1316 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1317 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1318 { 1319 int noff; 1320 int ret; 1321 1322 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1323 if (noff != -FDT_ERR_NOTFOUND) { 1324 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1325 add_edid: 1326 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1327 if (ret == -FDT_ERR_NOSPACE) { 1328 ret = fdt_increase_size(blob, 512); 1329 if (!ret) 1330 goto add_edid; 1331 else 1332 goto err_size; 1333 } else if (ret < 0) { 1334 printf("Can't add property: %s\n", fdt_strerror(ret)); 1335 return ret; 1336 } 1337 } 1338 return 0; 1339 err_size: 1340 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1341 return ret; 1342 } 1343 #endif 1344 1345 /* 1346 * Verify the physical address of device tree node for a given alias 1347 * 1348 * This function locates the device tree node of a given alias, and then 1349 * verifies that the physical address of that device matches the given 1350 * parameter. It displays a message if there is a mismatch. 1351 * 1352 * Returns 1 on success, 0 on failure 1353 */ 1354 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1355 { 1356 const char *path; 1357 const fdt32_t *reg; 1358 int node, len; 1359 u64 dt_addr; 1360 1361 path = fdt_getprop(fdt, anode, alias, NULL); 1362 if (!path) { 1363 /* If there's no such alias, then it's not a failure */ 1364 return 1; 1365 } 1366 1367 node = fdt_path_offset(fdt, path); 1368 if (node < 0) { 1369 printf("Warning: device tree alias '%s' points to invalid " 1370 "node %s.\n", alias, path); 1371 return 0; 1372 } 1373 1374 reg = fdt_getprop(fdt, node, "reg", &len); 1375 if (!reg) { 1376 printf("Warning: device tree node '%s' has no address.\n", 1377 path); 1378 return 0; 1379 } 1380 1381 dt_addr = fdt_translate_address(fdt, node, reg); 1382 if (addr != dt_addr) { 1383 printf("Warning: U-Boot configured device %s at address %" 1384 PRIx64 ",\n but the device tree has it address %" 1385 PRIx64 ".\n", alias, addr, dt_addr); 1386 return 0; 1387 } 1388 1389 return 1; 1390 } 1391 1392 /* 1393 * Returns the base address of an SOC or PCI node 1394 */ 1395 u64 fdt_get_base_address(void *fdt, int node) 1396 { 1397 int size; 1398 u32 naddr; 1399 const fdt32_t *prop; 1400 1401 naddr = fdt_address_cells(fdt, node); 1402 1403 prop = fdt_getprop(fdt, node, "ranges", &size); 1404 1405 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0; 1406 } 1407 1408 /* 1409 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1410 */ 1411 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1412 uint64_t *val, int cells) 1413 { 1414 const fdt32_t *prop32 = &prop[cell_off]; 1415 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1416 1417 if ((cell_off + cells) > prop_len) 1418 return -FDT_ERR_NOSPACE; 1419 1420 switch (cells) { 1421 case 1: 1422 *val = fdt32_to_cpu(*prop32); 1423 break; 1424 case 2: 1425 *val = fdt64_to_cpu(*prop64); 1426 break; 1427 default: 1428 return -FDT_ERR_NOSPACE; 1429 } 1430 1431 return 0; 1432 } 1433 1434 /** 1435 * fdt_read_range - Read a node's n'th range property 1436 * 1437 * @fdt: ptr to device tree 1438 * @node: offset of node 1439 * @n: range index 1440 * @child_addr: pointer to storage for the "child address" field 1441 * @addr: pointer to storage for the CPU view translated physical start 1442 * @len: pointer to storage for the range length 1443 * 1444 * Convenience function that reads and interprets a specific range out of 1445 * a number of the "ranges" property array. 1446 */ 1447 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1448 uint64_t *addr, uint64_t *len) 1449 { 1450 int pnode = fdt_parent_offset(fdt, node); 1451 const fdt32_t *ranges; 1452 int pacells; 1453 int acells; 1454 int scells; 1455 int ranges_len; 1456 int cell = 0; 1457 int r = 0; 1458 1459 /* 1460 * The "ranges" property is an array of 1461 * { <child address> <parent address> <size in child address space> } 1462 * 1463 * All 3 elements can span a diffent number of cells. Fetch their size. 1464 */ 1465 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1466 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1467 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1468 1469 /* Now try to get the ranges property */ 1470 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1471 if (!ranges) 1472 return -FDT_ERR_NOTFOUND; 1473 ranges_len /= sizeof(uint32_t); 1474 1475 /* Jump to the n'th entry */ 1476 cell = n * (pacells + acells + scells); 1477 1478 /* Read <child address> */ 1479 if (child_addr) { 1480 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1481 acells); 1482 if (r) 1483 return r; 1484 } 1485 cell += acells; 1486 1487 /* Read <parent address> */ 1488 if (addr) 1489 *addr = fdt_translate_address(fdt, node, ranges + cell); 1490 cell += pacells; 1491 1492 /* Read <size in child address space> */ 1493 if (len) { 1494 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1495 if (r) 1496 return r; 1497 } 1498 1499 return 0; 1500 } 1501 1502 /** 1503 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1504 * 1505 * @fdt: ptr to device tree 1506 * @node: offset of the simplefb node 1507 * @base_address: framebuffer base address 1508 * @width: width in pixels 1509 * @height: height in pixels 1510 * @stride: bytes per line 1511 * @format: pixel format string 1512 * 1513 * Convenience function to fill and enable a simplefb node. 1514 */ 1515 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1516 u32 height, u32 stride, const char *format) 1517 { 1518 char name[32]; 1519 fdt32_t cells[4]; 1520 int i, addrc, sizec, ret; 1521 1522 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1523 &addrc, &sizec); 1524 i = 0; 1525 if (addrc == 2) 1526 cells[i++] = cpu_to_fdt32(base_address >> 32); 1527 cells[i++] = cpu_to_fdt32(base_address); 1528 if (sizec == 2) 1529 cells[i++] = 0; 1530 cells[i++] = cpu_to_fdt32(height * stride); 1531 1532 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1533 if (ret < 0) 1534 return ret; 1535 1536 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1537 ret = fdt_set_name(fdt, node, name); 1538 if (ret < 0) 1539 return ret; 1540 1541 ret = fdt_setprop_u32(fdt, node, "width", width); 1542 if (ret < 0) 1543 return ret; 1544 1545 ret = fdt_setprop_u32(fdt, node, "height", height); 1546 if (ret < 0) 1547 return ret; 1548 1549 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1550 if (ret < 0) 1551 return ret; 1552 1553 ret = fdt_setprop_string(fdt, node, "format", format); 1554 if (ret < 0) 1555 return ret; 1556 1557 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1558 if (ret < 0) 1559 return ret; 1560 1561 return 0; 1562 } 1563 1564 /* 1565 * Update native-mode in display-timings from display environment variable. 1566 * The node to update are specified by path. 1567 */ 1568 int fdt_fixup_display(void *blob, const char *path, const char *display) 1569 { 1570 int off, toff; 1571 1572 if (!display || !path) 1573 return -FDT_ERR_NOTFOUND; 1574 1575 toff = fdt_path_offset(blob, path); 1576 if (toff >= 0) 1577 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1578 if (toff < 0) 1579 return toff; 1580 1581 for (off = fdt_first_subnode(blob, toff); 1582 off >= 0; 1583 off = fdt_next_subnode(blob, off)) { 1584 uint32_t h = fdt_get_phandle(blob, off); 1585 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1586 fdt32_to_cpu(h)); 1587 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1588 return fdt_setprop_u32(blob, toff, "native-mode", h); 1589 } 1590 return toff; 1591 } 1592