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 <android_image.h> 12 #include <exports.h> 13 #include <fdt_support.h> 14 #include <fdtdec.h> 15 #include <inttypes.h> 16 #include <malloc.h> 17 #ifdef CONFIG_MTD_BLK 18 #include <mtd_blk.h> 19 #endif 20 #include <stdio_dev.h> 21 #include <asm/arch/hotkey.h> 22 #include <asm/global_data.h> 23 #include <linux/ctype.h> 24 #include <linux/libfdt.h> 25 #include <linux/types.h> 26 27 DECLARE_GLOBAL_DATA_PTR; 28 29 /** 30 * fdt_getprop_u32_default_node - Return a node's property or a default 31 * 32 * @fdt: ptr to device tree 33 * @off: offset of node 34 * @cell: cell offset in property 35 * @prop: property name 36 * @dflt: default value if the property isn't found 37 * 38 * Convenience function to return a node's property or a default value if 39 * the property doesn't exist. 40 */ 41 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, 42 const char *prop, const u32 dflt) 43 { 44 const fdt32_t *val; 45 int len; 46 47 val = fdt_getprop(fdt, off, prop, &len); 48 49 /* Check if property exists */ 50 if (!val) 51 return dflt; 52 53 /* Check if property is long enough */ 54 if (len < ((cell + 1) * sizeof(uint32_t))) 55 return dflt; 56 57 return fdt32_to_cpu(*val); 58 } 59 60 /** 61 * fdt_getprop_u32_default - Find a node and return it's property or a default 62 * 63 * @fdt: ptr to device tree 64 * @path: path of node 65 * @prop: property name 66 * @dflt: default value if the property isn't found 67 * 68 * Convenience function to find a node and return it's property or a 69 * default value if it doesn't exist. 70 */ 71 u32 fdt_getprop_u32_default(const void *fdt, const char *path, 72 const char *prop, const u32 dflt) 73 { 74 int off; 75 76 off = fdt_path_offset(fdt, path); 77 if (off < 0) 78 return dflt; 79 80 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); 81 } 82 83 /** 84 * fdt_find_and_setprop: Find a node and set it's property 85 * 86 * @fdt: ptr to device tree 87 * @node: path of node 88 * @prop: property name 89 * @val: ptr to new value 90 * @len: length of new property value 91 * @create: flag to create the property if it doesn't exist 92 * 93 * Convenience function to directly set a property given the path to the node. 94 */ 95 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 96 const void *val, int len, int create) 97 { 98 int nodeoff = fdt_path_offset(fdt, node); 99 100 if (nodeoff < 0) 101 return nodeoff; 102 103 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) 104 return 0; /* create flag not set; so exit quietly */ 105 106 return fdt_setprop(fdt, nodeoff, prop, val, len); 107 } 108 109 /** 110 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node 111 * 112 * @fdt: pointer to the device tree blob 113 * @parentoffset: structure block offset of a node 114 * @name: name of the subnode to locate 115 * 116 * fdt_subnode_offset() finds a subnode of the node with a given name. 117 * If the subnode does not exist, it will be created. 118 */ 119 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) 120 { 121 int offset; 122 123 offset = fdt_subnode_offset(fdt, parentoffset, name); 124 125 if (offset == -FDT_ERR_NOTFOUND) 126 offset = fdt_add_subnode(fdt, parentoffset, name); 127 128 if (offset < 0) 129 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset)); 130 131 return offset; 132 } 133 134 /* rename to CONFIG_OF_STDOUT_PATH ? */ 135 #if defined(OF_STDOUT_PATH) 136 static int fdt_fixup_stdout(void *fdt, int chosenoff) 137 { 138 return fdt_setprop(fdt, chosenoff, "linux,stdout-path", 139 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); 140 } 141 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) 142 static int fdt_fixup_stdout(void *fdt, int chosenoff) 143 { 144 int err; 145 int aliasoff; 146 char sername[9] = { 0 }; 147 const void *path; 148 int len; 149 char tmp[256]; /* long enough */ 150 151 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 152 153 aliasoff = fdt_path_offset(fdt, "/aliases"); 154 if (aliasoff < 0) { 155 err = aliasoff; 156 goto noalias; 157 } 158 159 path = fdt_getprop(fdt, aliasoff, sername, &len); 160 if (!path) { 161 err = len; 162 goto noalias; 163 } 164 165 /* fdt_setprop may break "path" so we copy it to tmp buffer */ 166 memcpy(tmp, path, len); 167 168 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); 169 if (err < 0) 170 printf("WARNING: could not set linux,stdout-path %s.\n", 171 fdt_strerror(err)); 172 173 return err; 174 175 noalias: 176 printf("WARNING: %s: could not read %s alias: %s\n", 177 __func__, sername, fdt_strerror(err)); 178 179 return 0; 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 int fdt_root(void *fdt) 198 { 199 char *serial; 200 int err; 201 202 err = fdt_check_header(fdt); 203 if (err < 0) { 204 printf("fdt_root: %s\n", fdt_strerror(err)); 205 return err; 206 } 207 208 serial = env_get("serial#"); 209 if (serial) { 210 err = fdt_setprop(fdt, 0, "serial-number", serial, 211 strlen(serial) + 1); 212 213 if (err < 0) { 214 printf("WARNING: could not set serial-number %s.\n", 215 fdt_strerror(err)); 216 return err; 217 } 218 } 219 220 return 0; 221 } 222 223 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) 224 { 225 int nodeoffset; 226 int err, j, total; 227 int is_u64; 228 uint64_t addr, size; 229 230 /* just return if the size of initrd is zero */ 231 if (initrd_start == initrd_end) 232 return 0; 233 234 /* find or create "/chosen" node. */ 235 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 236 if (nodeoffset < 0) 237 return nodeoffset; 238 239 total = fdt_num_mem_rsv(fdt); 240 241 /* 242 * Look for an existing entry and update it. If we don't find 243 * the entry, we will j be the next available slot. 244 */ 245 for (j = 0; j < total; j++) { 246 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 247 if (addr == initrd_start) { 248 fdt_del_mem_rsv(fdt, j); 249 break; 250 } 251 } 252 253 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 254 if (err < 0) { 255 printf("fdt_initrd: %s\n", fdt_strerror(err)); 256 return err; 257 } 258 259 is_u64 = (fdt_address_cells(fdt, 0) == 2); 260 261 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", 262 (uint64_t)initrd_start, is_u64); 263 264 if (err < 0) { 265 printf("WARNING: could not set linux,initrd-start %s.\n", 266 fdt_strerror(err)); 267 return err; 268 } 269 270 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", 271 (uint64_t)initrd_end, is_u64); 272 273 if (err < 0) { 274 printf("WARNING: could not set linux,initrd-end %s.\n", 275 fdt_strerror(err)); 276 277 return err; 278 } 279 280 return 0; 281 } 282 283 int fdt_bootargs_append(void *fdt, char *data) 284 { 285 const char *arr_bootargs[] = { "bootargs", "bootargs_ext" }; 286 int nodeoffset, len; 287 const char *bootargs; 288 char *str; 289 int i, ret = 0; 290 291 if (!data) 292 return 0; 293 294 /* find or create "/chosen" node. */ 295 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 296 if (nodeoffset < 0) 297 return nodeoffset; 298 299 for (i = 0; i < ARRAY_SIZE(arr_bootargs); i++) { 300 bootargs = fdt_getprop(fdt, nodeoffset, 301 arr_bootargs[i], NULL); 302 if (bootargs) { 303 len = strlen(bootargs) + strlen(data) + 2; 304 str = malloc(len); 305 if (!str) 306 return -ENOMEM; 307 308 fdt_increase_size(fdt, 512); 309 snprintf(str, len, "%s %s", bootargs, data); 310 ret = fdt_setprop(fdt, nodeoffset, arr_bootargs[i], 311 str, len); 312 if (ret < 0) 313 printf("WARNING: could not set bootargs %s.\n", fdt_strerror(ret)); 314 315 free(str); 316 break; 317 } 318 } 319 320 return ret; 321 } 322 323 int fdt_bootargs_append_ab(void *fdt, char *slot) 324 { 325 char *str; 326 int len, ret = 0; 327 328 if (!slot) 329 return 0; 330 331 len = strlen(ANDROID_ARG_SLOT_SUFFIX) + strlen(slot) + 1; 332 str = malloc(len); 333 if (!str) 334 return -ENOMEM; 335 336 snprintf(str, len, "%s%s", ANDROID_ARG_SLOT_SUFFIX, slot); 337 ret = fdt_bootargs_append(fdt, str); 338 if (ret) 339 printf("Apend slot info to bootargs fail"); 340 341 free(str); 342 343 return ret; 344 } 345 346 /** 347 * board_fdt_chosen_bootargs - boards may override this function to use 348 * alternative kernel command line arguments 349 */ 350 __weak char *board_fdt_chosen_bootargs(void *fdt) 351 { 352 return env_get("bootargs"); 353 } 354 355 int fdt_chosen(void *fdt) 356 { 357 int nodeoffset; 358 int err; 359 char *str; /* used to set string properties */ 360 361 err = fdt_check_header(fdt); 362 if (err < 0) { 363 printf("fdt_chosen: %s\n", fdt_strerror(err)); 364 return err; 365 } 366 367 /* find or create "/chosen" node. */ 368 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 369 if (nodeoffset < 0) 370 return nodeoffset; 371 372 str = board_fdt_chosen_bootargs(fdt); 373 if (str) { 374 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 375 strlen(str) + 1); 376 if (err < 0) { 377 printf("WARNING: could not set bootargs %s.\n", 378 fdt_strerror(err)); 379 return err; 380 } 381 } 382 383 return fdt_fixup_stdout(fdt, nodeoffset); 384 } 385 386 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 387 const void *val, int len, int create) 388 { 389 #if defined(DEBUG) 390 int i; 391 debug("Updating property '%s/%s' = ", path, prop); 392 for (i = 0; i < len; i++) 393 debug(" %.2x", *(u8*)(val+i)); 394 debug("\n"); 395 #endif 396 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 397 if (rc) 398 printf("Unable to update property %s:%s, err=%s\n", 399 path, prop, fdt_strerror(rc)); 400 } 401 402 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 403 u32 val, int create) 404 { 405 fdt32_t tmp = cpu_to_fdt32(val); 406 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 407 } 408 409 void do_fixup_by_prop(void *fdt, 410 const char *pname, const void *pval, int plen, 411 const char *prop, const void *val, int len, 412 int create) 413 { 414 int off; 415 #if defined(DEBUG) 416 int i; 417 debug("Updating property '%s' = ", prop); 418 for (i = 0; i < len; i++) 419 debug(" %.2x", *(u8*)(val+i)); 420 debug("\n"); 421 #endif 422 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 423 while (off != -FDT_ERR_NOTFOUND) { 424 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 425 fdt_setprop(fdt, off, prop, val, len); 426 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 427 } 428 } 429 430 void do_fixup_by_prop_u32(void *fdt, 431 const char *pname, const void *pval, int plen, 432 const char *prop, u32 val, int create) 433 { 434 fdt32_t tmp = cpu_to_fdt32(val); 435 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 436 } 437 438 void do_fixup_by_compat(void *fdt, const char *compat, 439 const char *prop, const void *val, int len, int create) 440 { 441 int off = -1; 442 #if defined(DEBUG) 443 int i; 444 debug("Updating property '%s' = ", prop); 445 for (i = 0; i < len; i++) 446 debug(" %.2x", *(u8*)(val+i)); 447 debug("\n"); 448 #endif 449 off = fdt_node_offset_by_compatible(fdt, -1, compat); 450 while (off != -FDT_ERR_NOTFOUND) { 451 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 452 fdt_setprop(fdt, off, prop, val, len); 453 off = fdt_node_offset_by_compatible(fdt, off, compat); 454 } 455 } 456 457 void do_fixup_by_compat_u32(void *fdt, const char *compat, 458 const char *prop, u32 val, int create) 459 { 460 fdt32_t tmp = cpu_to_fdt32(val); 461 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 462 } 463 464 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY 465 /* 466 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 467 */ 468 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 469 int n) 470 { 471 int i; 472 int address_cells = fdt_address_cells(fdt, 0); 473 int size_cells = fdt_size_cells(fdt, 0); 474 char *p = buf; 475 476 for (i = 0; i < n; i++) { 477 if (address_cells == 2) 478 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 479 else 480 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 481 p += 4 * address_cells; 482 483 if (size_cells == 2) 484 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 485 else 486 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 487 p += 4 * size_cells; 488 } 489 490 return p - (char *)buf; 491 } 492 493 int fdt_record_loadable(void *blob, u32 index, const char *name, 494 uintptr_t load_addr, u32 size, uintptr_t entry_point, 495 const char *type, const char *os) 496 { 497 int err, node; 498 499 err = fdt_check_header(blob); 500 if (err < 0) { 501 printf("%s: %s\n", __func__, fdt_strerror(err)); 502 return err; 503 } 504 505 /* find or create "/fit-images" node */ 506 node = fdt_find_or_add_subnode(blob, 0, "fit-images"); 507 if (node < 0) 508 return node; 509 510 /* find or create "/fit-images/<name>" node */ 511 node = fdt_find_or_add_subnode(blob, node, name); 512 if (node < 0) 513 return node; 514 515 /* 516 * We record these as 32bit entities, possibly truncating addresses. 517 * However, spl_fit.c is not 64bit safe either: i.e. we should not 518 * have an issue here. 519 */ 520 fdt_setprop_u32(blob, node, "load-addr", load_addr); 521 if (entry_point != -1) 522 fdt_setprop_u32(blob, node, "entry-point", entry_point); 523 fdt_setprop_u32(blob, node, "size", size); 524 if (type) 525 fdt_setprop_string(blob, node, "type", type); 526 if (os) 527 fdt_setprop_string(blob, node, "os", os); 528 529 return node; 530 } 531 532 #ifdef CONFIG_NR_DRAM_BANKS 533 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 534 #else 535 #define MEMORY_BANKS_MAX 4 536 #endif 537 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 538 { 539 int err, nodeoffset; 540 int len; 541 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 542 543 if (banks > MEMORY_BANKS_MAX) { 544 printf("%s: num banks %d exceeds hardcoded limit %d." 545 " Recompile with higher MEMORY_BANKS_MAX?\n", 546 __FUNCTION__, banks, MEMORY_BANKS_MAX); 547 return -1; 548 } 549 550 err = fdt_check_header(blob); 551 if (err < 0) { 552 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 553 return err; 554 } 555 556 /* find or create "/memory" node. */ 557 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 558 if (nodeoffset < 0) 559 return nodeoffset; 560 561 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 562 sizeof("memory")); 563 if (err < 0) { 564 printf("WARNING: could not set %s %s.\n", "device_type", 565 fdt_strerror(err)); 566 return err; 567 } 568 569 if (!banks) 570 return 0; 571 572 len = fdt_pack_reg(blob, tmp, start, size, banks); 573 574 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 575 if (err < 0) { 576 printf("WARNING: could not set %s %s.\n", 577 "reg", fdt_strerror(err)); 578 return err; 579 } 580 return 0; 581 } 582 583 int fdt_fixup_memory(void *blob, u64 start, u64 size) 584 { 585 return fdt_fixup_memory_banks(blob, &start, &size, 1); 586 } 587 588 int fdt_update_reserved_memory(void *blob, char *name, u64 start, u64 size) 589 { 590 int nodeoffset, len, err; 591 u8 tmp[16]; /* Up to 64-bit address + 64-bit size */ 592 593 nodeoffset = fdt_node_offset_by_compatible(blob, 0, name); 594 if (nodeoffset < 0) 595 debug("Can't find nodeoffset: %d\n", nodeoffset); 596 597 if (!size) 598 return nodeoffset; 599 600 len = fdt_pack_reg(blob, tmp, &start, &size, 1); 601 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 602 if (err < 0) { 603 printf("WARNING: could not set %s %s.\n", 604 "reg", fdt_strerror(err)); 605 return err; 606 } 607 608 return nodeoffset; 609 } 610 #endif 611 612 void fdt_fixup_ethernet(void *fdt) 613 { 614 int i = 0, j, prop; 615 char *tmp, *end; 616 char mac[16]; 617 const char *path; 618 unsigned char mac_addr[ARP_HLEN]; 619 int offset; 620 #ifdef FDT_SEQ_MACADDR_FROM_ENV 621 int nodeoff; 622 const struct fdt_property *fdt_prop; 623 #endif 624 625 if (fdt_path_offset(fdt, "/aliases") < 0) 626 return; 627 628 /* Cycle through all aliases */ 629 for (prop = 0; ; prop++) { 630 const char *name; 631 632 /* FDT might have been edited, recompute the offset */ 633 offset = fdt_first_property_offset(fdt, 634 fdt_path_offset(fdt, "/aliases")); 635 /* Select property number 'prop' */ 636 for (j = 0; j < prop; j++) 637 offset = fdt_next_property_offset(fdt, offset); 638 639 if (offset < 0) 640 break; 641 642 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 643 if (!strncmp(name, "ethernet", 8)) { 644 /* Treat plain "ethernet" same as "ethernet0". */ 645 if (!strcmp(name, "ethernet") 646 #ifdef FDT_SEQ_MACADDR_FROM_ENV 647 || !strcmp(name, "ethernet0") 648 #endif 649 ) 650 i = 0; 651 #ifndef FDT_SEQ_MACADDR_FROM_ENV 652 else 653 i = trailing_strtol(name); 654 #endif 655 if (i != -1) { 656 if (i == 0) 657 strcpy(mac, "ethaddr"); 658 else 659 sprintf(mac, "eth%daddr", i); 660 } else { 661 continue; 662 } 663 #ifdef FDT_SEQ_MACADDR_FROM_ENV 664 nodeoff = fdt_path_offset(fdt, path); 665 fdt_prop = fdt_get_property(fdt, nodeoff, "status", 666 NULL); 667 if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) 668 continue; 669 i++; 670 #endif 671 tmp = env_get(mac); 672 if (!tmp) 673 continue; 674 675 for (j = 0; j < 6; j++) { 676 mac_addr[j] = tmp ? 677 simple_strtoul(tmp, &end, 16) : 0; 678 if (tmp) 679 tmp = (*end) ? end + 1 : end; 680 } 681 682 do_fixup_by_path(fdt, path, "mac-address", 683 &mac_addr, 6, 0); 684 do_fixup_by_path(fdt, path, "local-mac-address", 685 &mac_addr, 6, 1); 686 } 687 } 688 } 689 690 /* Resize the fdt to its actual size + a bit of padding */ 691 int fdt_shrink_to_minimum(void *blob, uint extrasize) 692 { 693 int i; 694 uint64_t addr, size; 695 int total, ret; 696 uint actualsize; 697 698 if (!blob) 699 return 0; 700 701 total = fdt_num_mem_rsv(blob); 702 for (i = 0; i < total; i++) { 703 fdt_get_mem_rsv(blob, i, &addr, &size); 704 if (addr == (uintptr_t)blob) { 705 fdt_del_mem_rsv(blob, i); 706 break; 707 } 708 } 709 710 /* 711 * Calculate the actual size of the fdt 712 * plus the size needed for 5 fdt_add_mem_rsv, one 713 * for the fdt itself and 4 for a possible initrd 714 * ((initrd-start + initrd-end) * 2 (name & value)) 715 */ 716 actualsize = fdt_off_dt_strings(blob) + 717 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 718 719 actualsize += extrasize; 720 /* Make it so the fdt ends on a page boundary */ 721 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 722 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 723 724 /* Change the fdt header to reflect the correct size */ 725 fdt_set_totalsize(blob, actualsize); 726 727 /* Add the new reservation */ 728 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 729 if (ret < 0) 730 return ret; 731 732 return actualsize; 733 } 734 735 #ifdef CONFIG_PCI 736 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 737 738 #define FDT_PCI_PREFETCH (0x40000000) 739 #define FDT_PCI_MEM32 (0x02000000) 740 #define FDT_PCI_IO (0x01000000) 741 #define FDT_PCI_MEM64 (0x03000000) 742 743 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 744 745 int addrcell, sizecell, len, r; 746 u32 *dma_range; 747 /* sized based on pci addr cells, size-cells, & address-cells */ 748 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 749 750 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 751 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 752 753 dma_range = &dma_ranges[0]; 754 for (r = 0; r < hose->region_count; r++) { 755 u64 bus_start, phys_start, size; 756 757 /* skip if !PCI_REGION_SYS_MEMORY */ 758 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 759 continue; 760 761 bus_start = (u64)hose->regions[r].bus_start; 762 phys_start = (u64)hose->regions[r].phys_start; 763 size = (u64)hose->regions[r].size; 764 765 dma_range[0] = 0; 766 if (size >= 0x100000000ull) 767 dma_range[0] |= FDT_PCI_MEM64; 768 else 769 dma_range[0] |= FDT_PCI_MEM32; 770 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 771 dma_range[0] |= FDT_PCI_PREFETCH; 772 #ifdef CONFIG_SYS_PCI_64BIT 773 dma_range[1] = bus_start >> 32; 774 #else 775 dma_range[1] = 0; 776 #endif 777 dma_range[2] = bus_start & 0xffffffff; 778 779 if (addrcell == 2) { 780 dma_range[3] = phys_start >> 32; 781 dma_range[4] = phys_start & 0xffffffff; 782 } else { 783 dma_range[3] = phys_start & 0xffffffff; 784 } 785 786 if (sizecell == 2) { 787 dma_range[3 + addrcell + 0] = size >> 32; 788 dma_range[3 + addrcell + 1] = size & 0xffffffff; 789 } else { 790 dma_range[3 + addrcell + 0] = size & 0xffffffff; 791 } 792 793 dma_range += (3 + addrcell + sizecell); 794 } 795 796 len = dma_range - &dma_ranges[0]; 797 if (len) 798 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 799 800 return 0; 801 } 802 #endif 803 804 int fdt_increase_size(void *fdt, int add_len) 805 { 806 int newlen; 807 808 newlen = fdt_totalsize(fdt) + add_len; 809 810 /* Open in place with a new len */ 811 return fdt_open_into(fdt, fdt, newlen); 812 } 813 814 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 815 #include <jffs2/load_kernel.h> 816 #include <mtd_node.h> 817 818 struct reg_cell { 819 unsigned int r0; 820 unsigned int r1; 821 }; 822 823 int fdt_del_subnodes(const void *blob, int parent_offset) 824 { 825 int off, ndepth; 826 int ret; 827 828 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 829 (off >= 0) && (ndepth > 0); 830 off = fdt_next_node(blob, off, &ndepth)) { 831 if (ndepth == 1) { 832 debug("delete %s: offset: %x\n", 833 fdt_get_name(blob, off, 0), off); 834 ret = fdt_del_node((void *)blob, off); 835 if (ret < 0) { 836 printf("Can't delete node: %s\n", 837 fdt_strerror(ret)); 838 return ret; 839 } else { 840 ndepth = 0; 841 off = parent_offset; 842 } 843 } 844 } 845 return 0; 846 } 847 848 int fdt_del_partitions(void *blob, int parent_offset) 849 { 850 const void *prop; 851 int ndepth = 0; 852 int off; 853 int ret; 854 855 off = fdt_next_node(blob, parent_offset, &ndepth); 856 if (off > 0 && ndepth == 1) { 857 prop = fdt_getprop(blob, off, "label", NULL); 858 if (prop == NULL) { 859 /* 860 * Could not find label property, nand {}; node? 861 * Check subnode, delete partitions there if any. 862 */ 863 return fdt_del_partitions(blob, off); 864 } else { 865 ret = fdt_del_subnodes(blob, parent_offset); 866 if (ret < 0) { 867 printf("Can't remove subnodes: %s\n", 868 fdt_strerror(ret)); 869 return ret; 870 } 871 } 872 } 873 return 0; 874 } 875 876 int fdt_node_set_part_info(void *blob, int parent_offset, 877 struct mtd_device *dev) 878 { 879 struct list_head *pentry; 880 struct part_info *part; 881 struct reg_cell cell; 882 int off, ndepth = 0; 883 int part_num, ret; 884 char buf[64]; 885 886 ret = fdt_del_partitions(blob, parent_offset); 887 if (ret < 0) 888 return ret; 889 890 /* 891 * Check if it is nand {}; subnode, adjust 892 * the offset in this case 893 */ 894 off = fdt_next_node(blob, parent_offset, &ndepth); 895 if (off > 0 && ndepth == 1) 896 parent_offset = off; 897 898 part_num = 0; 899 list_for_each_prev(pentry, &dev->parts) { 900 int newoff; 901 902 part = list_entry(pentry, struct part_info, link); 903 904 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 905 part_num, part->name, part->size, 906 part->offset, part->mask_flags); 907 908 sprintf(buf, "partition@%llx", part->offset); 909 add_sub: 910 ret = fdt_add_subnode(blob, parent_offset, buf); 911 if (ret == -FDT_ERR_NOSPACE) { 912 ret = fdt_increase_size(blob, 512); 913 if (!ret) 914 goto add_sub; 915 else 916 goto err_size; 917 } else if (ret < 0) { 918 printf("Can't add partition node: %s\n", 919 fdt_strerror(ret)); 920 return ret; 921 } 922 newoff = ret; 923 924 /* Check MTD_WRITEABLE_CMD flag */ 925 if (part->mask_flags & 1) { 926 add_ro: 927 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 928 if (ret == -FDT_ERR_NOSPACE) { 929 ret = fdt_increase_size(blob, 512); 930 if (!ret) 931 goto add_ro; 932 else 933 goto err_size; 934 } else if (ret < 0) 935 goto err_prop; 936 } 937 938 cell.r0 = cpu_to_fdt32(part->offset); 939 cell.r1 = cpu_to_fdt32(part->size); 940 add_reg: 941 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 942 if (ret == -FDT_ERR_NOSPACE) { 943 ret = fdt_increase_size(blob, 512); 944 if (!ret) 945 goto add_reg; 946 else 947 goto err_size; 948 } else if (ret < 0) 949 goto err_prop; 950 951 add_label: 952 ret = fdt_setprop_string(blob, newoff, "label", part->name); 953 if (ret == -FDT_ERR_NOSPACE) { 954 ret = fdt_increase_size(blob, 512); 955 if (!ret) 956 goto add_label; 957 else 958 goto err_size; 959 } else if (ret < 0) 960 goto err_prop; 961 962 part_num++; 963 } 964 return 0; 965 err_size: 966 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 967 return ret; 968 err_prop: 969 printf("Can't add property: %s\n", fdt_strerror(ret)); 970 return ret; 971 } 972 973 /* 974 * Update partitions in nor/nand nodes using info from 975 * mtdparts environment variable. The nodes to update are 976 * specified by node_info structure which contains mtd device 977 * type and compatible string: E. g. the board code in 978 * ft_board_setup() could use: 979 * 980 * struct node_info nodes[] = { 981 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 982 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 983 * }; 984 * 985 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 986 */ 987 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 988 { 989 struct node_info *ni = node_info; 990 struct mtd_device *dev; 991 int i, idx; 992 int noff; 993 994 if (mtdparts_init() != 0) 995 return; 996 997 for (i = 0; i < node_info_size; i++) { 998 idx = 0; 999 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 1000 while (noff != -FDT_ERR_NOTFOUND) { 1001 debug("%s: %s, mtd dev type %d\n", 1002 fdt_get_name(blob, noff, 0), 1003 ni[i].compat, ni[i].type); 1004 dev = device_find(ni[i].type, idx++); 1005 if (dev) { 1006 if (fdt_node_set_part_info(blob, noff, dev)) 1007 return; /* return on error */ 1008 } 1009 1010 /* Jump to next flash node */ 1011 noff = fdt_node_offset_by_compatible(blob, noff, 1012 ni[i].compat); 1013 } 1014 } 1015 } 1016 #endif 1017 1018 void fdt_del_node_and_alias(void *blob, const char *alias) 1019 { 1020 int off = fdt_path_offset(blob, alias); 1021 1022 if (off < 0) 1023 return; 1024 1025 fdt_del_node(blob, off); 1026 1027 off = fdt_path_offset(blob, "/aliases"); 1028 fdt_delprop(blob, off, alias); 1029 } 1030 1031 /* Max address size we deal with */ 1032 #define OF_MAX_ADDR_CELLS 4 1033 #define OF_BAD_ADDR FDT_ADDR_T_NONE 1034 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 1035 (ns) > 0) 1036 1037 /* Debug utility */ 1038 #ifdef DEBUG 1039 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 1040 { 1041 printf("%s", s); 1042 while(na--) 1043 printf(" %08x", *(addr++)); 1044 printf("\n"); 1045 } 1046 #else 1047 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 1048 #endif 1049 1050 /** 1051 * struct of_bus - Callbacks for bus specific translators 1052 * @name: A string used to identify this bus in debug output. 1053 * @addresses: The name of the DT property from which addresses are 1054 * to be read, typically "reg". 1055 * @match: Return non-zero if the node whose parent is at 1056 * parentoffset in the FDT blob corresponds to a bus 1057 * of this type, otherwise return zero. If NULL a match 1058 * is assumed. 1059 * @count_cells:Count how many cells (be32 values) a node whose parent 1060 * is at parentoffset in the FDT blob will require to 1061 * represent its address (written to *addrc) & size 1062 * (written to *sizec). 1063 * @map: Map the address addr from the address space of this 1064 * bus to that of its parent, making use of the ranges 1065 * read from DT to an array at range. na and ns are the 1066 * number of cells (be32 values) used to hold and address 1067 * or size, respectively, for this bus. pna is the number 1068 * of cells used to hold an address for the parent bus. 1069 * Returns the address in the address space of the parent 1070 * bus. 1071 * @translate: Update the value of the address cells at addr within an 1072 * FDT by adding offset to it. na specifies the number of 1073 * cells used to hold the address being translated. Returns 1074 * zero on success, non-zero on error. 1075 * 1076 * Each bus type will include a struct of_bus in the of_busses array, 1077 * providing implementations of some or all of the functions used to 1078 * match the bus & handle address translation for its children. 1079 */ 1080 struct of_bus { 1081 const char *name; 1082 const char *addresses; 1083 int (*match)(const void *blob, int parentoffset); 1084 void (*count_cells)(const void *blob, int parentoffset, 1085 int *addrc, int *sizec); 1086 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 1087 int na, int ns, int pna); 1088 int (*translate)(fdt32_t *addr, u64 offset, int na); 1089 }; 1090 1091 /* Default translator (generic bus) */ 1092 void fdt_support_default_count_cells(const void *blob, int parentoffset, 1093 int *addrc, int *sizec) 1094 { 1095 const fdt32_t *prop; 1096 1097 if (addrc) 1098 *addrc = fdt_address_cells(blob, parentoffset); 1099 1100 if (sizec) { 1101 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 1102 if (prop) 1103 *sizec = be32_to_cpup(prop); 1104 else 1105 *sizec = 1; 1106 } 1107 } 1108 1109 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1110 int na, int ns, int pna) 1111 { 1112 u64 cp, s, da; 1113 1114 cp = fdt_read_number(range, na); 1115 s = fdt_read_number(range + na + pna, ns); 1116 da = fdt_read_number(addr, na); 1117 1118 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 1119 ", da=%" PRIu64 "\n", cp, s, da); 1120 1121 if (da < cp || da >= (cp + s)) 1122 return OF_BAD_ADDR; 1123 return da - cp; 1124 } 1125 1126 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1127 { 1128 u64 a = fdt_read_number(addr, na); 1129 memset(addr, 0, na * 4); 1130 a += offset; 1131 if (na > 1) 1132 addr[na - 2] = cpu_to_fdt32(a >> 32); 1133 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1134 1135 return 0; 1136 } 1137 1138 #ifdef CONFIG_OF_ISA_BUS 1139 1140 /* ISA bus translator */ 1141 static int of_bus_isa_match(const void *blob, int parentoffset) 1142 { 1143 const char *name; 1144 1145 name = fdt_get_name(blob, parentoffset, NULL); 1146 if (!name) 1147 return 0; 1148 1149 return !strcmp(name, "isa"); 1150 } 1151 1152 static void of_bus_isa_count_cells(const void *blob, int parentoffset, 1153 int *addrc, int *sizec) 1154 { 1155 if (addrc) 1156 *addrc = 2; 1157 if (sizec) 1158 *sizec = 1; 1159 } 1160 1161 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range, 1162 int na, int ns, int pna) 1163 { 1164 u64 cp, s, da; 1165 1166 /* Check address type match */ 1167 if ((addr[0] ^ range[0]) & cpu_to_be32(1)) 1168 return OF_BAD_ADDR; 1169 1170 cp = fdt_read_number(range + 1, na - 1); 1171 s = fdt_read_number(range + na + pna, ns); 1172 da = fdt_read_number(addr + 1, na - 1); 1173 1174 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64 1175 ", da=%" PRIu64 "\n", cp, s, da); 1176 1177 if (da < cp || da >= (cp + s)) 1178 return OF_BAD_ADDR; 1179 return da - cp; 1180 } 1181 1182 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na) 1183 { 1184 return of_bus_default_translate(addr + 1, offset, na - 1); 1185 } 1186 1187 #endif /* CONFIG_OF_ISA_BUS */ 1188 1189 /* Array of bus specific translators */ 1190 static struct of_bus of_busses[] = { 1191 #ifdef CONFIG_OF_ISA_BUS 1192 /* ISA */ 1193 { 1194 .name = "isa", 1195 .addresses = "reg", 1196 .match = of_bus_isa_match, 1197 .count_cells = of_bus_isa_count_cells, 1198 .map = of_bus_isa_map, 1199 .translate = of_bus_isa_translate, 1200 }, 1201 #endif /* CONFIG_OF_ISA_BUS */ 1202 /* Default */ 1203 { 1204 .name = "default", 1205 .addresses = "reg", 1206 .count_cells = fdt_support_default_count_cells, 1207 .map = of_bus_default_map, 1208 .translate = of_bus_default_translate, 1209 }, 1210 }; 1211 1212 static struct of_bus *of_match_bus(const void *blob, int parentoffset) 1213 { 1214 struct of_bus *bus; 1215 1216 if (ARRAY_SIZE(of_busses) == 1) 1217 return of_busses; 1218 1219 for (bus = of_busses; bus; bus++) { 1220 if (!bus->match || bus->match(blob, parentoffset)) 1221 return bus; 1222 } 1223 1224 /* 1225 * We should always have matched the default bus at least, since 1226 * it has a NULL match field. If we didn't then it somehow isn't 1227 * in the of_busses array or something equally catastrophic has 1228 * gone wrong. 1229 */ 1230 assert(0); 1231 return NULL; 1232 } 1233 1234 static int of_translate_one(const void *blob, int parent, struct of_bus *bus, 1235 struct of_bus *pbus, fdt32_t *addr, 1236 int na, int ns, int pna, const char *rprop) 1237 { 1238 const fdt32_t *ranges; 1239 int rlen; 1240 int rone; 1241 u64 offset = OF_BAD_ADDR; 1242 1243 /* Normally, an absence of a "ranges" property means we are 1244 * crossing a non-translatable boundary, and thus the addresses 1245 * below the current not cannot be converted to CPU physical ones. 1246 * Unfortunately, while this is very clear in the spec, it's not 1247 * what Apple understood, and they do have things like /uni-n or 1248 * /ht nodes with no "ranges" property and a lot of perfectly 1249 * useable mapped devices below them. Thus we treat the absence of 1250 * "ranges" as equivalent to an empty "ranges" property which means 1251 * a 1:1 translation at that level. It's up to the caller not to try 1252 * to translate addresses that aren't supposed to be translated in 1253 * the first place. --BenH. 1254 */ 1255 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1256 if (ranges == NULL || rlen == 0) { 1257 offset = fdt_read_number(addr, na); 1258 memset(addr, 0, pna * 4); 1259 debug("OF: no ranges, 1:1 translation\n"); 1260 goto finish; 1261 } 1262 1263 debug("OF: walking ranges...\n"); 1264 1265 /* Now walk through the ranges */ 1266 rlen /= 4; 1267 rone = na + pna + ns; 1268 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1269 offset = bus->map(addr, ranges, na, ns, pna); 1270 if (offset != OF_BAD_ADDR) 1271 break; 1272 } 1273 if (offset == OF_BAD_ADDR) { 1274 debug("OF: not found !\n"); 1275 return 1; 1276 } 1277 memcpy(addr, ranges + na, 4 * pna); 1278 1279 finish: 1280 of_dump_addr("OF: parent translation for:", addr, pna); 1281 debug("OF: with offset: %" PRIu64 "\n", offset); 1282 1283 /* Translate it into parent bus space */ 1284 return pbus->translate(addr, offset, pna); 1285 } 1286 1287 /* 1288 * Translate an address from the device-tree into a CPU physical address, 1289 * this walks up the tree and applies the various bus mappings on the 1290 * way. 1291 * 1292 * Note: We consider that crossing any level with #size-cells == 0 to mean 1293 * that translation is impossible (that is we are not dealing with a value 1294 * that can be mapped to a cpu physical address). This is not really specified 1295 * that way, but this is traditionally the way IBM at least do things 1296 */ 1297 static u64 __of_translate_address(const void *blob, int node_offset, 1298 const fdt32_t *in_addr, const char *rprop) 1299 { 1300 int parent; 1301 struct of_bus *bus, *pbus; 1302 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1303 int na, ns, pna, pns; 1304 u64 result = OF_BAD_ADDR; 1305 1306 debug("OF: ** translation for device %s **\n", 1307 fdt_get_name(blob, node_offset, NULL)); 1308 1309 /* Get parent & match bus type */ 1310 parent = fdt_parent_offset(blob, node_offset); 1311 if (parent < 0) 1312 goto bail; 1313 bus = of_match_bus(blob, parent); 1314 1315 /* Cound address cells & copy address locally */ 1316 bus->count_cells(blob, parent, &na, &ns); 1317 if (!OF_CHECK_COUNTS(na, ns)) { 1318 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1319 fdt_get_name(blob, node_offset, NULL)); 1320 goto bail; 1321 } 1322 memcpy(addr, in_addr, na * 4); 1323 1324 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1325 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1326 of_dump_addr("OF: translating address:", addr, na); 1327 1328 /* Translate */ 1329 for (;;) { 1330 /* Switch to parent bus */ 1331 node_offset = parent; 1332 parent = fdt_parent_offset(blob, node_offset); 1333 1334 /* If root, we have finished */ 1335 if (parent < 0) { 1336 debug("OF: reached root node\n"); 1337 result = fdt_read_number(addr, na); 1338 break; 1339 } 1340 1341 /* Get new parent bus and counts */ 1342 pbus = of_match_bus(blob, parent); 1343 pbus->count_cells(blob, parent, &pna, &pns); 1344 if (!OF_CHECK_COUNTS(pna, pns)) { 1345 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1346 fdt_get_name(blob, node_offset, NULL)); 1347 break; 1348 } 1349 1350 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1351 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1352 1353 /* Apply bus translation */ 1354 if (of_translate_one(blob, node_offset, bus, pbus, 1355 addr, na, ns, pna, rprop)) 1356 break; 1357 1358 /* Complete the move up one level */ 1359 na = pna; 1360 ns = pns; 1361 bus = pbus; 1362 1363 of_dump_addr("OF: one level translation:", addr, na); 1364 } 1365 bail: 1366 1367 return result; 1368 } 1369 1370 u64 fdt_translate_address(const void *blob, int node_offset, 1371 const fdt32_t *in_addr) 1372 { 1373 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1374 } 1375 1376 /** 1377 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1378 * who's reg property matches a physical cpu address 1379 * 1380 * @blob: ptr to device tree 1381 * @compat: compatiable string to match 1382 * @compat_off: property name 1383 * 1384 */ 1385 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1386 phys_addr_t compat_off) 1387 { 1388 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1389 while (off != -FDT_ERR_NOTFOUND) { 1390 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1391 if (reg) { 1392 if (compat_off == fdt_translate_address(blob, off, reg)) 1393 return off; 1394 } 1395 off = fdt_node_offset_by_compatible(blob, off, compat); 1396 } 1397 1398 return -FDT_ERR_NOTFOUND; 1399 } 1400 1401 /** 1402 * fdt_alloc_phandle: Return next free phandle value 1403 * 1404 * @blob: ptr to device tree 1405 */ 1406 int fdt_alloc_phandle(void *blob) 1407 { 1408 int offset; 1409 uint32_t phandle = 0; 1410 1411 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1412 offset = fdt_next_node(blob, offset, NULL)) { 1413 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1414 } 1415 1416 return phandle + 1; 1417 } 1418 1419 /* 1420 * fdt_set_phandle: Create a phandle property for the given node 1421 * 1422 * @fdt: ptr to device tree 1423 * @nodeoffset: node to update 1424 * @phandle: phandle value to set (must be unique) 1425 */ 1426 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1427 { 1428 int ret; 1429 1430 #ifdef DEBUG 1431 int off = fdt_node_offset_by_phandle(fdt, phandle); 1432 1433 if ((off >= 0) && (off != nodeoffset)) { 1434 char buf[64]; 1435 1436 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1437 printf("Trying to update node %s with phandle %u ", 1438 buf, phandle); 1439 1440 fdt_get_path(fdt, off, buf, sizeof(buf)); 1441 printf("that already exists in node %s.\n", buf); 1442 return -FDT_ERR_BADPHANDLE; 1443 } 1444 #endif 1445 1446 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1447 if (ret < 0) 1448 return ret; 1449 1450 /* 1451 * For now, also set the deprecated "linux,phandle" property, so that we 1452 * don't break older kernels. 1453 */ 1454 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1455 1456 return ret; 1457 } 1458 1459 /* 1460 * fdt_create_phandle: Create a phandle property for the given node 1461 * 1462 * @fdt: ptr to device tree 1463 * @nodeoffset: node to update 1464 */ 1465 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1466 { 1467 /* see if there is a phandle already */ 1468 int phandle = fdt_get_phandle(fdt, nodeoffset); 1469 1470 /* if we got 0, means no phandle so create one */ 1471 if (phandle == 0) { 1472 int ret; 1473 1474 phandle = fdt_alloc_phandle(fdt); 1475 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1476 if (ret < 0) { 1477 printf("Can't set phandle %u: %s\n", phandle, 1478 fdt_strerror(ret)); 1479 return 0; 1480 } 1481 } 1482 1483 return phandle; 1484 } 1485 1486 /* 1487 * fdt_set_node_status: Set status for the given node 1488 * 1489 * @fdt: ptr to device tree 1490 * @nodeoffset: node to update 1491 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1492 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1493 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1494 */ 1495 int fdt_set_node_status(void *fdt, int nodeoffset, 1496 enum fdt_status status, unsigned int error_code) 1497 { 1498 char buf[16]; 1499 int ret = 0; 1500 1501 if (nodeoffset < 0) 1502 return nodeoffset; 1503 1504 switch (status) { 1505 case FDT_STATUS_OKAY: 1506 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1507 break; 1508 case FDT_STATUS_DISABLED: 1509 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1510 break; 1511 case FDT_STATUS_FAIL: 1512 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1513 break; 1514 case FDT_STATUS_FAIL_ERROR_CODE: 1515 sprintf(buf, "fail-%d", error_code); 1516 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1517 break; 1518 default: 1519 printf("Invalid fdt status: %x\n", status); 1520 ret = -1; 1521 break; 1522 } 1523 1524 return ret; 1525 } 1526 1527 /* 1528 * fdt_set_status_by_alias: Set status for the given node given an alias 1529 * 1530 * @fdt: ptr to device tree 1531 * @alias: alias of node to update 1532 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1533 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1534 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1535 */ 1536 int fdt_set_status_by_alias(void *fdt, const char* alias, 1537 enum fdt_status status, unsigned int error_code) 1538 { 1539 int offset = fdt_path_offset(fdt, alias); 1540 1541 return fdt_set_node_status(fdt, offset, status, error_code); 1542 } 1543 1544 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1545 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1546 { 1547 int noff; 1548 int ret; 1549 1550 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1551 if (noff != -FDT_ERR_NOTFOUND) { 1552 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1553 add_edid: 1554 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1555 if (ret == -FDT_ERR_NOSPACE) { 1556 ret = fdt_increase_size(blob, 512); 1557 if (!ret) 1558 goto add_edid; 1559 else 1560 goto err_size; 1561 } else if (ret < 0) { 1562 printf("Can't add property: %s\n", fdt_strerror(ret)); 1563 return ret; 1564 } 1565 } 1566 return 0; 1567 err_size: 1568 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1569 return ret; 1570 } 1571 #endif 1572 1573 /* 1574 * Verify the physical address of device tree node for a given alias 1575 * 1576 * This function locates the device tree node of a given alias, and then 1577 * verifies that the physical address of that device matches the given 1578 * parameter. It displays a message if there is a mismatch. 1579 * 1580 * Returns 1 on success, 0 on failure 1581 */ 1582 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1583 { 1584 const char *path; 1585 const fdt32_t *reg; 1586 int node, len; 1587 u64 dt_addr; 1588 1589 path = fdt_getprop(fdt, anode, alias, NULL); 1590 if (!path) { 1591 /* If there's no such alias, then it's not a failure */ 1592 return 1; 1593 } 1594 1595 node = fdt_path_offset(fdt, path); 1596 if (node < 0) { 1597 printf("Warning: device tree alias '%s' points to invalid " 1598 "node %s.\n", alias, path); 1599 return 0; 1600 } 1601 1602 reg = fdt_getprop(fdt, node, "reg", &len); 1603 if (!reg) { 1604 printf("Warning: device tree node '%s' has no address.\n", 1605 path); 1606 return 0; 1607 } 1608 1609 dt_addr = fdt_translate_address(fdt, node, reg); 1610 if (addr != dt_addr) { 1611 printf("Warning: U-Boot configured device %s at address %" 1612 PRIx64 ",\n but the device tree has it address %" 1613 PRIx64 ".\n", alias, addr, dt_addr); 1614 return 0; 1615 } 1616 1617 return 1; 1618 } 1619 1620 /* 1621 * Returns the base address of an SOC or PCI node 1622 */ 1623 u64 fdt_get_base_address(const void *fdt, int node) 1624 { 1625 int size; 1626 const fdt32_t *prop; 1627 1628 prop = fdt_getprop(fdt, node, "reg", &size); 1629 1630 return prop ? fdt_translate_address(fdt, node, prop) : 0; 1631 } 1632 1633 /* 1634 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1635 */ 1636 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1637 uint64_t *val, int cells) 1638 { 1639 const fdt32_t *prop32 = &prop[cell_off]; 1640 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1641 1642 if ((cell_off + cells) > prop_len) 1643 return -FDT_ERR_NOSPACE; 1644 1645 switch (cells) { 1646 case 1: 1647 *val = fdt32_to_cpu(*prop32); 1648 break; 1649 case 2: 1650 *val = fdt64_to_cpu(*prop64); 1651 break; 1652 default: 1653 return -FDT_ERR_NOSPACE; 1654 } 1655 1656 return 0; 1657 } 1658 1659 /** 1660 * fdt_read_range - Read a node's n'th range property 1661 * 1662 * @fdt: ptr to device tree 1663 * @node: offset of node 1664 * @n: range index 1665 * @child_addr: pointer to storage for the "child address" field 1666 * @addr: pointer to storage for the CPU view translated physical start 1667 * @len: pointer to storage for the range length 1668 * 1669 * Convenience function that reads and interprets a specific range out of 1670 * a number of the "ranges" property array. 1671 */ 1672 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1673 uint64_t *addr, uint64_t *len) 1674 { 1675 int pnode = fdt_parent_offset(fdt, node); 1676 const fdt32_t *ranges; 1677 int pacells; 1678 int acells; 1679 int scells; 1680 int ranges_len; 1681 int cell = 0; 1682 int r = 0; 1683 1684 /* 1685 * The "ranges" property is an array of 1686 * { <child address> <parent address> <size in child address space> } 1687 * 1688 * All 3 elements can span a diffent number of cells. Fetch their size. 1689 */ 1690 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1691 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1692 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1693 1694 /* Now try to get the ranges property */ 1695 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1696 if (!ranges) 1697 return -FDT_ERR_NOTFOUND; 1698 ranges_len /= sizeof(uint32_t); 1699 1700 /* Jump to the n'th entry */ 1701 cell = n * (pacells + acells + scells); 1702 1703 /* Read <child address> */ 1704 if (child_addr) { 1705 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1706 acells); 1707 if (r) 1708 return r; 1709 } 1710 cell += acells; 1711 1712 /* Read <parent address> */ 1713 if (addr) 1714 *addr = fdt_translate_address(fdt, node, ranges + cell); 1715 cell += pacells; 1716 1717 /* Read <size in child address space> */ 1718 if (len) { 1719 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1720 if (r) 1721 return r; 1722 } 1723 1724 return 0; 1725 } 1726 1727 /** 1728 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1729 * 1730 * @fdt: ptr to device tree 1731 * @node: offset of the simplefb node 1732 * @base_address: framebuffer base address 1733 * @width: width in pixels 1734 * @height: height in pixels 1735 * @stride: bytes per line 1736 * @format: pixel format string 1737 * 1738 * Convenience function to fill and enable a simplefb node. 1739 */ 1740 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1741 u32 height, u32 stride, const char *format) 1742 { 1743 char name[32]; 1744 fdt32_t cells[4]; 1745 int i, addrc, sizec, ret; 1746 1747 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1748 &addrc, &sizec); 1749 i = 0; 1750 if (addrc == 2) 1751 cells[i++] = cpu_to_fdt32(base_address >> 32); 1752 cells[i++] = cpu_to_fdt32(base_address); 1753 if (sizec == 2) 1754 cells[i++] = 0; 1755 cells[i++] = cpu_to_fdt32(height * stride); 1756 1757 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1758 if (ret < 0) 1759 return ret; 1760 1761 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1762 ret = fdt_set_name(fdt, node, name); 1763 if (ret < 0) 1764 return ret; 1765 1766 ret = fdt_setprop_u32(fdt, node, "width", width); 1767 if (ret < 0) 1768 return ret; 1769 1770 ret = fdt_setprop_u32(fdt, node, "height", height); 1771 if (ret < 0) 1772 return ret; 1773 1774 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1775 if (ret < 0) 1776 return ret; 1777 1778 ret = fdt_setprop_string(fdt, node, "format", format); 1779 if (ret < 0) 1780 return ret; 1781 1782 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1783 if (ret < 0) 1784 return ret; 1785 1786 return 0; 1787 } 1788 1789 /* 1790 * Update native-mode in display-timings from display environment variable. 1791 * The node to update are specified by path. 1792 */ 1793 int fdt_fixup_display(void *blob, const char *path, const char *display) 1794 { 1795 int off, toff; 1796 1797 if (!display || !path) 1798 return -FDT_ERR_NOTFOUND; 1799 1800 toff = fdt_path_offset(blob, path); 1801 if (toff >= 0) 1802 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1803 if (toff < 0) 1804 return toff; 1805 1806 for (off = fdt_first_subnode(blob, toff); 1807 off >= 0; 1808 off = fdt_next_subnode(blob, off)) { 1809 uint32_t h = fdt_get_phandle(blob, off); 1810 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1811 fdt32_to_cpu(h)); 1812 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1813 return fdt_setprop_u32(blob, toff, "native-mode", h); 1814 } 1815 return toff; 1816 } 1817 1818 #ifdef CONFIG_OF_LIBFDT_OVERLAY 1819 /** 1820 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting 1821 * 1822 * @fdt: ptr to device tree 1823 * @fdto: ptr to device tree overlay 1824 * 1825 * Convenience function to apply an overlay and display helpful messages 1826 * in the case of an error 1827 */ 1828 int fdt_overlay_apply_verbose(void *fdt, void *fdto) 1829 { 1830 int err; 1831 bool has_symbols; 1832 1833 err = fdt_path_offset(fdt, "/__symbols__"); 1834 has_symbols = err >= 0; 1835 1836 err = fdt_overlay_apply(fdt, fdto); 1837 if (err < 0) { 1838 printf("failed on fdt_overlay_apply(): %s\n", 1839 fdt_strerror(err)); 1840 if (!has_symbols) { 1841 printf("base fdt does did not have a /__symbols__ node\n"); 1842 printf("make sure you've compiled with -@\n"); 1843 } 1844 } 1845 return err; 1846 } 1847 #endif 1848