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 static 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, strlen(data) + 1); 309 snprintf(str, len, "%s %s", bootargs, data); 310 ret = fdt_setprop(fdt, nodeoffset, "bootargs", 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 int fdt_chosen(void *fdt) 347 { 348 /* 349 * "bootargs_ext" is used when dtbo is applied. 350 */ 351 const char *arr_bootargs[] = { "bootargs", "bootargs_ext" }; 352 int nodeoffset; 353 int err; 354 int i; 355 char *str; /* used to set string properties */ 356 int dump; 357 358 dump = is_hotkey(HK_CMDLINE); 359 360 err = fdt_check_header(fdt); 361 if (err < 0) { 362 printf("fdt_chosen: %s\n", fdt_strerror(err)); 363 return err; 364 } 365 366 /* find or create "/chosen" node. */ 367 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 368 if (nodeoffset < 0) 369 return nodeoffset; 370 371 str = env_get("bootargs"); 372 if (str) { 373 #ifdef CONFIG_ARCH_ROCKCHIP 374 const char *bootargs; 375 376 if (dump) 377 printf("## U-Boot bootargs: %s\n", str); 378 379 for (i = 0; i < ARRAY_SIZE(arr_bootargs); i++) { 380 bootargs = fdt_getprop(fdt, nodeoffset, 381 arr_bootargs[i], NULL); 382 if (bootargs) { 383 if (dump) 384 printf("## Kernel %s: %s\n", 385 arr_bootargs[i], bootargs); 386 /* 387 * Append kernel bootargs 388 * If use AB system, delete default "root=" which route 389 * to rootfs. Then the ab bootctl will choose the 390 * high priority system to boot and add its UUID 391 * to cmdline. The format is "roo=PARTUUID=xxxx...". 392 */ 393 hotkey_run(HK_INITCALL); 394 #ifdef CONFIG_ANDROID_AB 395 env_update_filter("bootargs", bootargs, "root="); 396 #else 397 env_update("bootargs", bootargs); 398 #endif 399 #ifdef CONFIG_MTD_BLK 400 char *mtd_par_info = mtd_part_parse(); 401 402 if (mtd_par_info) { 403 if (memcmp(env_get("devtype"), "mtd", 3) == 0) 404 env_update("bootargs", mtd_par_info); 405 } 406 #endif 407 /* 408 * Initrd fixup: remove unused "initrd=0x...,0x...", 409 * this for compatible with legacy parameter.txt 410 */ 411 env_delete("bootargs", "initrd=", 0); 412 413 /* 414 * If uart is required to be disabled during 415 * power on, it would be not initialized by 416 * any pre-loader and U-Boot. 417 * 418 * If we don't remove earlycon from commandline, 419 * kernel hangs while using earlycon to putc/getc 420 * which may dead loop for waiting uart status. 421 * (It seems the root cause is baundrate is not 422 * initilalized) 423 * 424 * So let's remove earlycon from commandline. 425 */ 426 if (gd->flags & GD_FLG_DISABLE_CONSOLE) 427 env_delete("bootargs", "earlycon=", 0); 428 } 429 #endif 430 } 431 432 str = env_get("bootargs"); 433 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 434 strlen(str) + 1); 435 if (err < 0) { 436 printf("WARNING: could not set bootargs %s.\n", 437 fdt_strerror(err)); 438 return err; 439 } 440 } 441 442 if (dump) 443 printf("## Merged bootargs: %s\n", env_get("bootargs")); 444 445 return fdt_fixup_stdout(fdt, nodeoffset); 446 } 447 448 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 449 const void *val, int len, int create) 450 { 451 #if defined(DEBUG) 452 int i; 453 debug("Updating property '%s/%s' = ", path, prop); 454 for (i = 0; i < len; i++) 455 debug(" %.2x", *(u8*)(val+i)); 456 debug("\n"); 457 #endif 458 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 459 if (rc) 460 printf("Unable to update property %s:%s, err=%s\n", 461 path, prop, fdt_strerror(rc)); 462 } 463 464 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 465 u32 val, int create) 466 { 467 fdt32_t tmp = cpu_to_fdt32(val); 468 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 469 } 470 471 void do_fixup_by_prop(void *fdt, 472 const char *pname, const void *pval, int plen, 473 const char *prop, const void *val, int len, 474 int create) 475 { 476 int off; 477 #if defined(DEBUG) 478 int i; 479 debug("Updating property '%s' = ", prop); 480 for (i = 0; i < len; i++) 481 debug(" %.2x", *(u8*)(val+i)); 482 debug("\n"); 483 #endif 484 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 485 while (off != -FDT_ERR_NOTFOUND) { 486 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 487 fdt_setprop(fdt, off, prop, val, len); 488 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 489 } 490 } 491 492 void do_fixup_by_prop_u32(void *fdt, 493 const char *pname, const void *pval, int plen, 494 const char *prop, u32 val, int create) 495 { 496 fdt32_t tmp = cpu_to_fdt32(val); 497 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 498 } 499 500 void do_fixup_by_compat(void *fdt, const char *compat, 501 const char *prop, const void *val, int len, int create) 502 { 503 int off = -1; 504 #if defined(DEBUG) 505 int i; 506 debug("Updating property '%s' = ", prop); 507 for (i = 0; i < len; i++) 508 debug(" %.2x", *(u8*)(val+i)); 509 debug("\n"); 510 #endif 511 off = fdt_node_offset_by_compatible(fdt, -1, compat); 512 while (off != -FDT_ERR_NOTFOUND) { 513 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 514 fdt_setprop(fdt, off, prop, val, len); 515 off = fdt_node_offset_by_compatible(fdt, off, compat); 516 } 517 } 518 519 void do_fixup_by_compat_u32(void *fdt, const char *compat, 520 const char *prop, u32 val, int create) 521 { 522 fdt32_t tmp = cpu_to_fdt32(val); 523 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 524 } 525 526 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY 527 /* 528 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 529 */ 530 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 531 int n) 532 { 533 int i; 534 int address_cells = fdt_address_cells(fdt, 0); 535 int size_cells = fdt_size_cells(fdt, 0); 536 char *p = buf; 537 538 for (i = 0; i < n; i++) { 539 if (address_cells == 2) 540 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 541 else 542 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 543 p += 4 * address_cells; 544 545 if (size_cells == 2) 546 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 547 else 548 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 549 p += 4 * size_cells; 550 } 551 552 return p - (char *)buf; 553 } 554 555 int fdt_record_loadable(void *blob, u32 index, const char *name, 556 uintptr_t load_addr, u32 size, uintptr_t entry_point, 557 const char *type, const char *os) 558 { 559 int err, node; 560 561 err = fdt_check_header(blob); 562 if (err < 0) { 563 printf("%s: %s\n", __func__, fdt_strerror(err)); 564 return err; 565 } 566 567 /* find or create "/fit-images" node */ 568 node = fdt_find_or_add_subnode(blob, 0, "fit-images"); 569 if (node < 0) 570 return node; 571 572 /* find or create "/fit-images/<name>" node */ 573 node = fdt_find_or_add_subnode(blob, node, name); 574 if (node < 0) 575 return node; 576 577 /* 578 * We record these as 32bit entities, possibly truncating addresses. 579 * However, spl_fit.c is not 64bit safe either: i.e. we should not 580 * have an issue here. 581 */ 582 fdt_setprop_u32(blob, node, "load-addr", load_addr); 583 if (entry_point != -1) 584 fdt_setprop_u32(blob, node, "entry-point", entry_point); 585 fdt_setprop_u32(blob, node, "size", size); 586 if (type) 587 fdt_setprop_string(blob, node, "type", type); 588 if (os) 589 fdt_setprop_string(blob, node, "os", os); 590 591 return node; 592 } 593 594 #ifdef CONFIG_NR_DRAM_BANKS 595 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 596 #else 597 #define MEMORY_BANKS_MAX 4 598 #endif 599 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 600 { 601 int err, nodeoffset; 602 int len; 603 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 604 605 if (banks > MEMORY_BANKS_MAX) { 606 printf("%s: num banks %d exceeds hardcoded limit %d." 607 " Recompile with higher MEMORY_BANKS_MAX?\n", 608 __FUNCTION__, banks, MEMORY_BANKS_MAX); 609 return -1; 610 } 611 612 err = fdt_check_header(blob); 613 if (err < 0) { 614 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 615 return err; 616 } 617 618 /* find or create "/memory" node. */ 619 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 620 if (nodeoffset < 0) 621 return nodeoffset; 622 623 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 624 sizeof("memory")); 625 if (err < 0) { 626 printf("WARNING: could not set %s %s.\n", "device_type", 627 fdt_strerror(err)); 628 return err; 629 } 630 631 if (!banks) 632 return 0; 633 634 len = fdt_pack_reg(blob, tmp, start, size, banks); 635 636 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 637 if (err < 0) { 638 printf("WARNING: could not set %s %s.\n", 639 "reg", fdt_strerror(err)); 640 return err; 641 } 642 return 0; 643 } 644 645 int fdt_fixup_memory(void *blob, u64 start, u64 size) 646 { 647 return fdt_fixup_memory_banks(blob, &start, &size, 1); 648 } 649 650 int fdt_update_reserved_memory(void *blob, char *name, u64 start, u64 size) 651 { 652 int nodeoffset, len, err; 653 u8 tmp[16]; /* Up to 64-bit address + 64-bit size */ 654 655 #if 0 656 /*name is rockchip_logo*/ 657 nodeoffset = fdt_find_or_add_subnode(blob, 0, "reserved-memory"); 658 if (nodeoffset < 0) 659 return nodeoffset; 660 printf("hjc>>reserved-memory>>%s, nodeoffset:%d\n", __func__, nodeoffset); 661 nodeoffset = fdt_find_or_add_subnode(blob, nodeoffset, name); 662 if (nodeoffset < 0) 663 return nodeoffset; 664 #else 665 nodeoffset = fdt_node_offset_by_compatible(blob, 0, name); 666 if (nodeoffset < 0) 667 debug("Can't find nodeoffset: %d\n", nodeoffset); 668 #endif 669 len = fdt_pack_reg(blob, tmp, &start, &size, 1); 670 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 671 if (err < 0) { 672 printf("WARNING: could not set %s %s.\n", 673 "reg", fdt_strerror(err)); 674 return err; 675 } 676 677 return nodeoffset; 678 } 679 #endif 680 681 void fdt_fixup_ethernet(void *fdt) 682 { 683 int i = 0, j, prop; 684 char *tmp, *end; 685 char mac[16]; 686 const char *path; 687 unsigned char mac_addr[ARP_HLEN]; 688 int offset; 689 #ifdef FDT_SEQ_MACADDR_FROM_ENV 690 int nodeoff; 691 const struct fdt_property *fdt_prop; 692 #endif 693 694 if (fdt_path_offset(fdt, "/aliases") < 0) 695 return; 696 697 /* Cycle through all aliases */ 698 for (prop = 0; ; prop++) { 699 const char *name; 700 701 /* FDT might have been edited, recompute the offset */ 702 offset = fdt_first_property_offset(fdt, 703 fdt_path_offset(fdt, "/aliases")); 704 /* Select property number 'prop' */ 705 for (j = 0; j < prop; j++) 706 offset = fdt_next_property_offset(fdt, offset); 707 708 if (offset < 0) 709 break; 710 711 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 712 if (!strncmp(name, "ethernet", 8)) { 713 /* Treat plain "ethernet" same as "ethernet0". */ 714 if (!strcmp(name, "ethernet") 715 #ifdef FDT_SEQ_MACADDR_FROM_ENV 716 || !strcmp(name, "ethernet0") 717 #endif 718 ) 719 i = 0; 720 #ifndef FDT_SEQ_MACADDR_FROM_ENV 721 else 722 i = trailing_strtol(name); 723 #endif 724 if (i != -1) { 725 if (i == 0) 726 strcpy(mac, "ethaddr"); 727 else 728 sprintf(mac, "eth%daddr", i); 729 } else { 730 continue; 731 } 732 #ifdef FDT_SEQ_MACADDR_FROM_ENV 733 nodeoff = fdt_path_offset(fdt, path); 734 fdt_prop = fdt_get_property(fdt, nodeoff, "status", 735 NULL); 736 if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) 737 continue; 738 i++; 739 #endif 740 tmp = env_get(mac); 741 if (!tmp) 742 continue; 743 744 for (j = 0; j < 6; j++) { 745 mac_addr[j] = tmp ? 746 simple_strtoul(tmp, &end, 16) : 0; 747 if (tmp) 748 tmp = (*end) ? end + 1 : end; 749 } 750 751 do_fixup_by_path(fdt, path, "mac-address", 752 &mac_addr, 6, 0); 753 do_fixup_by_path(fdt, path, "local-mac-address", 754 &mac_addr, 6, 1); 755 } 756 } 757 } 758 759 /* Resize the fdt to its actual size + a bit of padding */ 760 int fdt_shrink_to_minimum(void *blob, uint extrasize) 761 { 762 int i; 763 uint64_t addr, size; 764 int total, ret; 765 uint actualsize; 766 767 if (!blob) 768 return 0; 769 770 total = fdt_num_mem_rsv(blob); 771 for (i = 0; i < total; i++) { 772 fdt_get_mem_rsv(blob, i, &addr, &size); 773 if (addr == (uintptr_t)blob) { 774 fdt_del_mem_rsv(blob, i); 775 break; 776 } 777 } 778 779 /* 780 * Calculate the actual size of the fdt 781 * plus the size needed for 5 fdt_add_mem_rsv, one 782 * for the fdt itself and 4 for a possible initrd 783 * ((initrd-start + initrd-end) * 2 (name & value)) 784 */ 785 actualsize = fdt_off_dt_strings(blob) + 786 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 787 788 actualsize += extrasize; 789 /* Make it so the fdt ends on a page boundary */ 790 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 791 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 792 793 /* Change the fdt header to reflect the correct size */ 794 fdt_set_totalsize(blob, actualsize); 795 796 /* Add the new reservation */ 797 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 798 if (ret < 0) 799 return ret; 800 801 return actualsize; 802 } 803 804 #ifdef CONFIG_PCI 805 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 806 807 #define FDT_PCI_PREFETCH (0x40000000) 808 #define FDT_PCI_MEM32 (0x02000000) 809 #define FDT_PCI_IO (0x01000000) 810 #define FDT_PCI_MEM64 (0x03000000) 811 812 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 813 814 int addrcell, sizecell, len, r; 815 u32 *dma_range; 816 /* sized based on pci addr cells, size-cells, & address-cells */ 817 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 818 819 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 820 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 821 822 dma_range = &dma_ranges[0]; 823 for (r = 0; r < hose->region_count; r++) { 824 u64 bus_start, phys_start, size; 825 826 /* skip if !PCI_REGION_SYS_MEMORY */ 827 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 828 continue; 829 830 bus_start = (u64)hose->regions[r].bus_start; 831 phys_start = (u64)hose->regions[r].phys_start; 832 size = (u64)hose->regions[r].size; 833 834 dma_range[0] = 0; 835 if (size >= 0x100000000ull) 836 dma_range[0] |= FDT_PCI_MEM64; 837 else 838 dma_range[0] |= FDT_PCI_MEM32; 839 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 840 dma_range[0] |= FDT_PCI_PREFETCH; 841 #ifdef CONFIG_SYS_PCI_64BIT 842 dma_range[1] = bus_start >> 32; 843 #else 844 dma_range[1] = 0; 845 #endif 846 dma_range[2] = bus_start & 0xffffffff; 847 848 if (addrcell == 2) { 849 dma_range[3] = phys_start >> 32; 850 dma_range[4] = phys_start & 0xffffffff; 851 } else { 852 dma_range[3] = phys_start & 0xffffffff; 853 } 854 855 if (sizecell == 2) { 856 dma_range[3 + addrcell + 0] = size >> 32; 857 dma_range[3 + addrcell + 1] = size & 0xffffffff; 858 } else { 859 dma_range[3 + addrcell + 0] = size & 0xffffffff; 860 } 861 862 dma_range += (3 + addrcell + sizecell); 863 } 864 865 len = dma_range - &dma_ranges[0]; 866 if (len) 867 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 868 869 return 0; 870 } 871 #endif 872 873 int fdt_increase_size(void *fdt, int add_len) 874 { 875 int newlen; 876 877 newlen = fdt_totalsize(fdt) + add_len; 878 879 /* Open in place with a new len */ 880 return fdt_open_into(fdt, fdt, newlen); 881 } 882 883 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 884 #include <jffs2/load_kernel.h> 885 #include <mtd_node.h> 886 887 struct reg_cell { 888 unsigned int r0; 889 unsigned int r1; 890 }; 891 892 int fdt_del_subnodes(const void *blob, int parent_offset) 893 { 894 int off, ndepth; 895 int ret; 896 897 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 898 (off >= 0) && (ndepth > 0); 899 off = fdt_next_node(blob, off, &ndepth)) { 900 if (ndepth == 1) { 901 debug("delete %s: offset: %x\n", 902 fdt_get_name(blob, off, 0), off); 903 ret = fdt_del_node((void *)blob, off); 904 if (ret < 0) { 905 printf("Can't delete node: %s\n", 906 fdt_strerror(ret)); 907 return ret; 908 } else { 909 ndepth = 0; 910 off = parent_offset; 911 } 912 } 913 } 914 return 0; 915 } 916 917 int fdt_del_partitions(void *blob, int parent_offset) 918 { 919 const void *prop; 920 int ndepth = 0; 921 int off; 922 int ret; 923 924 off = fdt_next_node(blob, parent_offset, &ndepth); 925 if (off > 0 && ndepth == 1) { 926 prop = fdt_getprop(blob, off, "label", NULL); 927 if (prop == NULL) { 928 /* 929 * Could not find label property, nand {}; node? 930 * Check subnode, delete partitions there if any. 931 */ 932 return fdt_del_partitions(blob, off); 933 } else { 934 ret = fdt_del_subnodes(blob, parent_offset); 935 if (ret < 0) { 936 printf("Can't remove subnodes: %s\n", 937 fdt_strerror(ret)); 938 return ret; 939 } 940 } 941 } 942 return 0; 943 } 944 945 int fdt_node_set_part_info(void *blob, int parent_offset, 946 struct mtd_device *dev) 947 { 948 struct list_head *pentry; 949 struct part_info *part; 950 struct reg_cell cell; 951 int off, ndepth = 0; 952 int part_num, ret; 953 char buf[64]; 954 955 ret = fdt_del_partitions(blob, parent_offset); 956 if (ret < 0) 957 return ret; 958 959 /* 960 * Check if it is nand {}; subnode, adjust 961 * the offset in this case 962 */ 963 off = fdt_next_node(blob, parent_offset, &ndepth); 964 if (off > 0 && ndepth == 1) 965 parent_offset = off; 966 967 part_num = 0; 968 list_for_each_prev(pentry, &dev->parts) { 969 int newoff; 970 971 part = list_entry(pentry, struct part_info, link); 972 973 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 974 part_num, part->name, part->size, 975 part->offset, part->mask_flags); 976 977 sprintf(buf, "partition@%llx", part->offset); 978 add_sub: 979 ret = fdt_add_subnode(blob, parent_offset, buf); 980 if (ret == -FDT_ERR_NOSPACE) { 981 ret = fdt_increase_size(blob, 512); 982 if (!ret) 983 goto add_sub; 984 else 985 goto err_size; 986 } else if (ret < 0) { 987 printf("Can't add partition node: %s\n", 988 fdt_strerror(ret)); 989 return ret; 990 } 991 newoff = ret; 992 993 /* Check MTD_WRITEABLE_CMD flag */ 994 if (part->mask_flags & 1) { 995 add_ro: 996 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 997 if (ret == -FDT_ERR_NOSPACE) { 998 ret = fdt_increase_size(blob, 512); 999 if (!ret) 1000 goto add_ro; 1001 else 1002 goto err_size; 1003 } else if (ret < 0) 1004 goto err_prop; 1005 } 1006 1007 cell.r0 = cpu_to_fdt32(part->offset); 1008 cell.r1 = cpu_to_fdt32(part->size); 1009 add_reg: 1010 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 1011 if (ret == -FDT_ERR_NOSPACE) { 1012 ret = fdt_increase_size(blob, 512); 1013 if (!ret) 1014 goto add_reg; 1015 else 1016 goto err_size; 1017 } else if (ret < 0) 1018 goto err_prop; 1019 1020 add_label: 1021 ret = fdt_setprop_string(blob, newoff, "label", part->name); 1022 if (ret == -FDT_ERR_NOSPACE) { 1023 ret = fdt_increase_size(blob, 512); 1024 if (!ret) 1025 goto add_label; 1026 else 1027 goto err_size; 1028 } else if (ret < 0) 1029 goto err_prop; 1030 1031 part_num++; 1032 } 1033 return 0; 1034 err_size: 1035 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1036 return ret; 1037 err_prop: 1038 printf("Can't add property: %s\n", fdt_strerror(ret)); 1039 return ret; 1040 } 1041 1042 /* 1043 * Update partitions in nor/nand nodes using info from 1044 * mtdparts environment variable. The nodes to update are 1045 * specified by node_info structure which contains mtd device 1046 * type and compatible string: E. g. the board code in 1047 * ft_board_setup() could use: 1048 * 1049 * struct node_info nodes[] = { 1050 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 1051 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 1052 * }; 1053 * 1054 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 1055 */ 1056 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 1057 { 1058 struct node_info *ni = node_info; 1059 struct mtd_device *dev; 1060 int i, idx; 1061 int noff; 1062 1063 if (mtdparts_init() != 0) 1064 return; 1065 1066 for (i = 0; i < node_info_size; i++) { 1067 idx = 0; 1068 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 1069 while (noff != -FDT_ERR_NOTFOUND) { 1070 debug("%s: %s, mtd dev type %d\n", 1071 fdt_get_name(blob, noff, 0), 1072 ni[i].compat, ni[i].type); 1073 dev = device_find(ni[i].type, idx++); 1074 if (dev) { 1075 if (fdt_node_set_part_info(blob, noff, dev)) 1076 return; /* return on error */ 1077 } 1078 1079 /* Jump to next flash node */ 1080 noff = fdt_node_offset_by_compatible(blob, noff, 1081 ni[i].compat); 1082 } 1083 } 1084 } 1085 #endif 1086 1087 void fdt_del_node_and_alias(void *blob, const char *alias) 1088 { 1089 int off = fdt_path_offset(blob, alias); 1090 1091 if (off < 0) 1092 return; 1093 1094 fdt_del_node(blob, off); 1095 1096 off = fdt_path_offset(blob, "/aliases"); 1097 fdt_delprop(blob, off, alias); 1098 } 1099 1100 /* Max address size we deal with */ 1101 #define OF_MAX_ADDR_CELLS 4 1102 #define OF_BAD_ADDR FDT_ADDR_T_NONE 1103 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 1104 (ns) > 0) 1105 1106 /* Debug utility */ 1107 #ifdef DEBUG 1108 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 1109 { 1110 printf("%s", s); 1111 while(na--) 1112 printf(" %08x", *(addr++)); 1113 printf("\n"); 1114 } 1115 #else 1116 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 1117 #endif 1118 1119 /** 1120 * struct of_bus - Callbacks for bus specific translators 1121 * @name: A string used to identify this bus in debug output. 1122 * @addresses: The name of the DT property from which addresses are 1123 * to be read, typically "reg". 1124 * @match: Return non-zero if the node whose parent is at 1125 * parentoffset in the FDT blob corresponds to a bus 1126 * of this type, otherwise return zero. If NULL a match 1127 * is assumed. 1128 * @count_cells:Count how many cells (be32 values) a node whose parent 1129 * is at parentoffset in the FDT blob will require to 1130 * represent its address (written to *addrc) & size 1131 * (written to *sizec). 1132 * @map: Map the address addr from the address space of this 1133 * bus to that of its parent, making use of the ranges 1134 * read from DT to an array at range. na and ns are the 1135 * number of cells (be32 values) used to hold and address 1136 * or size, respectively, for this bus. pna is the number 1137 * of cells used to hold an address for the parent bus. 1138 * Returns the address in the address space of the parent 1139 * bus. 1140 * @translate: Update the value of the address cells at addr within an 1141 * FDT by adding offset to it. na specifies the number of 1142 * cells used to hold the address being translated. Returns 1143 * zero on success, non-zero on error. 1144 * 1145 * Each bus type will include a struct of_bus in the of_busses array, 1146 * providing implementations of some or all of the functions used to 1147 * match the bus & handle address translation for its children. 1148 */ 1149 struct of_bus { 1150 const char *name; 1151 const char *addresses; 1152 int (*match)(const void *blob, int parentoffset); 1153 void (*count_cells)(const void *blob, int parentoffset, 1154 int *addrc, int *sizec); 1155 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 1156 int na, int ns, int pna); 1157 int (*translate)(fdt32_t *addr, u64 offset, int na); 1158 }; 1159 1160 /* Default translator (generic bus) */ 1161 void fdt_support_default_count_cells(const void *blob, int parentoffset, 1162 int *addrc, int *sizec) 1163 { 1164 const fdt32_t *prop; 1165 1166 if (addrc) 1167 *addrc = fdt_address_cells(blob, parentoffset); 1168 1169 if (sizec) { 1170 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 1171 if (prop) 1172 *sizec = be32_to_cpup(prop); 1173 else 1174 *sizec = 1; 1175 } 1176 } 1177 1178 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1179 int na, int ns, int pna) 1180 { 1181 u64 cp, s, da; 1182 1183 cp = fdt_read_number(range, na); 1184 s = fdt_read_number(range + na + pna, ns); 1185 da = fdt_read_number(addr, na); 1186 1187 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 1188 ", da=%" PRIu64 "\n", cp, s, da); 1189 1190 if (da < cp || da >= (cp + s)) 1191 return OF_BAD_ADDR; 1192 return da - cp; 1193 } 1194 1195 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1196 { 1197 u64 a = fdt_read_number(addr, na); 1198 memset(addr, 0, na * 4); 1199 a += offset; 1200 if (na > 1) 1201 addr[na - 2] = cpu_to_fdt32(a >> 32); 1202 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1203 1204 return 0; 1205 } 1206 1207 #ifdef CONFIG_OF_ISA_BUS 1208 1209 /* ISA bus translator */ 1210 static int of_bus_isa_match(const void *blob, int parentoffset) 1211 { 1212 const char *name; 1213 1214 name = fdt_get_name(blob, parentoffset, NULL); 1215 if (!name) 1216 return 0; 1217 1218 return !strcmp(name, "isa"); 1219 } 1220 1221 static void of_bus_isa_count_cells(const void *blob, int parentoffset, 1222 int *addrc, int *sizec) 1223 { 1224 if (addrc) 1225 *addrc = 2; 1226 if (sizec) 1227 *sizec = 1; 1228 } 1229 1230 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range, 1231 int na, int ns, int pna) 1232 { 1233 u64 cp, s, da; 1234 1235 /* Check address type match */ 1236 if ((addr[0] ^ range[0]) & cpu_to_be32(1)) 1237 return OF_BAD_ADDR; 1238 1239 cp = fdt_read_number(range + 1, na - 1); 1240 s = fdt_read_number(range + na + pna, ns); 1241 da = fdt_read_number(addr + 1, na - 1); 1242 1243 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64 1244 ", da=%" PRIu64 "\n", cp, s, da); 1245 1246 if (da < cp || da >= (cp + s)) 1247 return OF_BAD_ADDR; 1248 return da - cp; 1249 } 1250 1251 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na) 1252 { 1253 return of_bus_default_translate(addr + 1, offset, na - 1); 1254 } 1255 1256 #endif /* CONFIG_OF_ISA_BUS */ 1257 1258 /* Array of bus specific translators */ 1259 static struct of_bus of_busses[] = { 1260 #ifdef CONFIG_OF_ISA_BUS 1261 /* ISA */ 1262 { 1263 .name = "isa", 1264 .addresses = "reg", 1265 .match = of_bus_isa_match, 1266 .count_cells = of_bus_isa_count_cells, 1267 .map = of_bus_isa_map, 1268 .translate = of_bus_isa_translate, 1269 }, 1270 #endif /* CONFIG_OF_ISA_BUS */ 1271 /* Default */ 1272 { 1273 .name = "default", 1274 .addresses = "reg", 1275 .count_cells = fdt_support_default_count_cells, 1276 .map = of_bus_default_map, 1277 .translate = of_bus_default_translate, 1278 }, 1279 }; 1280 1281 static struct of_bus *of_match_bus(const void *blob, int parentoffset) 1282 { 1283 struct of_bus *bus; 1284 1285 if (ARRAY_SIZE(of_busses) == 1) 1286 return of_busses; 1287 1288 for (bus = of_busses; bus; bus++) { 1289 if (!bus->match || bus->match(blob, parentoffset)) 1290 return bus; 1291 } 1292 1293 /* 1294 * We should always have matched the default bus at least, since 1295 * it has a NULL match field. If we didn't then it somehow isn't 1296 * in the of_busses array or something equally catastrophic has 1297 * gone wrong. 1298 */ 1299 assert(0); 1300 return NULL; 1301 } 1302 1303 static int of_translate_one(const void *blob, int parent, struct of_bus *bus, 1304 struct of_bus *pbus, fdt32_t *addr, 1305 int na, int ns, int pna, const char *rprop) 1306 { 1307 const fdt32_t *ranges; 1308 int rlen; 1309 int rone; 1310 u64 offset = OF_BAD_ADDR; 1311 1312 /* Normally, an absence of a "ranges" property means we are 1313 * crossing a non-translatable boundary, and thus the addresses 1314 * below the current not cannot be converted to CPU physical ones. 1315 * Unfortunately, while this is very clear in the spec, it's not 1316 * what Apple understood, and they do have things like /uni-n or 1317 * /ht nodes with no "ranges" property and a lot of perfectly 1318 * useable mapped devices below them. Thus we treat the absence of 1319 * "ranges" as equivalent to an empty "ranges" property which means 1320 * a 1:1 translation at that level. It's up to the caller not to try 1321 * to translate addresses that aren't supposed to be translated in 1322 * the first place. --BenH. 1323 */ 1324 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1325 if (ranges == NULL || rlen == 0) { 1326 offset = fdt_read_number(addr, na); 1327 memset(addr, 0, pna * 4); 1328 debug("OF: no ranges, 1:1 translation\n"); 1329 goto finish; 1330 } 1331 1332 debug("OF: walking ranges...\n"); 1333 1334 /* Now walk through the ranges */ 1335 rlen /= 4; 1336 rone = na + pna + ns; 1337 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1338 offset = bus->map(addr, ranges, na, ns, pna); 1339 if (offset != OF_BAD_ADDR) 1340 break; 1341 } 1342 if (offset == OF_BAD_ADDR) { 1343 debug("OF: not found !\n"); 1344 return 1; 1345 } 1346 memcpy(addr, ranges + na, 4 * pna); 1347 1348 finish: 1349 of_dump_addr("OF: parent translation for:", addr, pna); 1350 debug("OF: with offset: %" PRIu64 "\n", offset); 1351 1352 /* Translate it into parent bus space */ 1353 return pbus->translate(addr, offset, pna); 1354 } 1355 1356 /* 1357 * Translate an address from the device-tree into a CPU physical address, 1358 * this walks up the tree and applies the various bus mappings on the 1359 * way. 1360 * 1361 * Note: We consider that crossing any level with #size-cells == 0 to mean 1362 * that translation is impossible (that is we are not dealing with a value 1363 * that can be mapped to a cpu physical address). This is not really specified 1364 * that way, but this is traditionally the way IBM at least do things 1365 */ 1366 static u64 __of_translate_address(const void *blob, int node_offset, 1367 const fdt32_t *in_addr, const char *rprop) 1368 { 1369 int parent; 1370 struct of_bus *bus, *pbus; 1371 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1372 int na, ns, pna, pns; 1373 u64 result = OF_BAD_ADDR; 1374 1375 debug("OF: ** translation for device %s **\n", 1376 fdt_get_name(blob, node_offset, NULL)); 1377 1378 /* Get parent & match bus type */ 1379 parent = fdt_parent_offset(blob, node_offset); 1380 if (parent < 0) 1381 goto bail; 1382 bus = of_match_bus(blob, parent); 1383 1384 /* Cound address cells & copy address locally */ 1385 bus->count_cells(blob, parent, &na, &ns); 1386 if (!OF_CHECK_COUNTS(na, ns)) { 1387 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1388 fdt_get_name(blob, node_offset, NULL)); 1389 goto bail; 1390 } 1391 memcpy(addr, in_addr, na * 4); 1392 1393 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1394 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1395 of_dump_addr("OF: translating address:", addr, na); 1396 1397 /* Translate */ 1398 for (;;) { 1399 /* Switch to parent bus */ 1400 node_offset = parent; 1401 parent = fdt_parent_offset(blob, node_offset); 1402 1403 /* If root, we have finished */ 1404 if (parent < 0) { 1405 debug("OF: reached root node\n"); 1406 result = fdt_read_number(addr, na); 1407 break; 1408 } 1409 1410 /* Get new parent bus and counts */ 1411 pbus = of_match_bus(blob, parent); 1412 pbus->count_cells(blob, parent, &pna, &pns); 1413 if (!OF_CHECK_COUNTS(pna, pns)) { 1414 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1415 fdt_get_name(blob, node_offset, NULL)); 1416 break; 1417 } 1418 1419 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1420 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1421 1422 /* Apply bus translation */ 1423 if (of_translate_one(blob, node_offset, bus, pbus, 1424 addr, na, ns, pna, rprop)) 1425 break; 1426 1427 /* Complete the move up one level */ 1428 na = pna; 1429 ns = pns; 1430 bus = pbus; 1431 1432 of_dump_addr("OF: one level translation:", addr, na); 1433 } 1434 bail: 1435 1436 return result; 1437 } 1438 1439 u64 fdt_translate_address(const void *blob, int node_offset, 1440 const fdt32_t *in_addr) 1441 { 1442 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1443 } 1444 1445 /** 1446 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1447 * who's reg property matches a physical cpu address 1448 * 1449 * @blob: ptr to device tree 1450 * @compat: compatiable string to match 1451 * @compat_off: property name 1452 * 1453 */ 1454 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1455 phys_addr_t compat_off) 1456 { 1457 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1458 while (off != -FDT_ERR_NOTFOUND) { 1459 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1460 if (reg) { 1461 if (compat_off == fdt_translate_address(blob, off, reg)) 1462 return off; 1463 } 1464 off = fdt_node_offset_by_compatible(blob, off, compat); 1465 } 1466 1467 return -FDT_ERR_NOTFOUND; 1468 } 1469 1470 /** 1471 * fdt_alloc_phandle: Return next free phandle value 1472 * 1473 * @blob: ptr to device tree 1474 */ 1475 int fdt_alloc_phandle(void *blob) 1476 { 1477 int offset; 1478 uint32_t phandle = 0; 1479 1480 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1481 offset = fdt_next_node(blob, offset, NULL)) { 1482 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1483 } 1484 1485 return phandle + 1; 1486 } 1487 1488 /* 1489 * fdt_set_phandle: Create a phandle property for the given node 1490 * 1491 * @fdt: ptr to device tree 1492 * @nodeoffset: node to update 1493 * @phandle: phandle value to set (must be unique) 1494 */ 1495 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1496 { 1497 int ret; 1498 1499 #ifdef DEBUG 1500 int off = fdt_node_offset_by_phandle(fdt, phandle); 1501 1502 if ((off >= 0) && (off != nodeoffset)) { 1503 char buf[64]; 1504 1505 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1506 printf("Trying to update node %s with phandle %u ", 1507 buf, phandle); 1508 1509 fdt_get_path(fdt, off, buf, sizeof(buf)); 1510 printf("that already exists in node %s.\n", buf); 1511 return -FDT_ERR_BADPHANDLE; 1512 } 1513 #endif 1514 1515 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1516 if (ret < 0) 1517 return ret; 1518 1519 /* 1520 * For now, also set the deprecated "linux,phandle" property, so that we 1521 * don't break older kernels. 1522 */ 1523 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1524 1525 return ret; 1526 } 1527 1528 /* 1529 * fdt_create_phandle: Create a phandle property for the given node 1530 * 1531 * @fdt: ptr to device tree 1532 * @nodeoffset: node to update 1533 */ 1534 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1535 { 1536 /* see if there is a phandle already */ 1537 int phandle = fdt_get_phandle(fdt, nodeoffset); 1538 1539 /* if we got 0, means no phandle so create one */ 1540 if (phandle == 0) { 1541 int ret; 1542 1543 phandle = fdt_alloc_phandle(fdt); 1544 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1545 if (ret < 0) { 1546 printf("Can't set phandle %u: %s\n", phandle, 1547 fdt_strerror(ret)); 1548 return 0; 1549 } 1550 } 1551 1552 return phandle; 1553 } 1554 1555 /* 1556 * fdt_set_node_status: Set status for the given node 1557 * 1558 * @fdt: ptr to device tree 1559 * @nodeoffset: node to update 1560 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1561 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1562 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1563 */ 1564 int fdt_set_node_status(void *fdt, int nodeoffset, 1565 enum fdt_status status, unsigned int error_code) 1566 { 1567 char buf[16]; 1568 int ret = 0; 1569 1570 if (nodeoffset < 0) 1571 return nodeoffset; 1572 1573 switch (status) { 1574 case FDT_STATUS_OKAY: 1575 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1576 break; 1577 case FDT_STATUS_DISABLED: 1578 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1579 break; 1580 case FDT_STATUS_FAIL: 1581 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1582 break; 1583 case FDT_STATUS_FAIL_ERROR_CODE: 1584 sprintf(buf, "fail-%d", error_code); 1585 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1586 break; 1587 default: 1588 printf("Invalid fdt status: %x\n", status); 1589 ret = -1; 1590 break; 1591 } 1592 1593 return ret; 1594 } 1595 1596 /* 1597 * fdt_set_status_by_alias: Set status for the given node given an alias 1598 * 1599 * @fdt: ptr to device tree 1600 * @alias: alias of node to update 1601 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1602 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1603 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1604 */ 1605 int fdt_set_status_by_alias(void *fdt, const char* alias, 1606 enum fdt_status status, unsigned int error_code) 1607 { 1608 int offset = fdt_path_offset(fdt, alias); 1609 1610 return fdt_set_node_status(fdt, offset, status, error_code); 1611 } 1612 1613 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1614 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1615 { 1616 int noff; 1617 int ret; 1618 1619 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1620 if (noff != -FDT_ERR_NOTFOUND) { 1621 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1622 add_edid: 1623 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1624 if (ret == -FDT_ERR_NOSPACE) { 1625 ret = fdt_increase_size(blob, 512); 1626 if (!ret) 1627 goto add_edid; 1628 else 1629 goto err_size; 1630 } else if (ret < 0) { 1631 printf("Can't add property: %s\n", fdt_strerror(ret)); 1632 return ret; 1633 } 1634 } 1635 return 0; 1636 err_size: 1637 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1638 return ret; 1639 } 1640 #endif 1641 1642 /* 1643 * Verify the physical address of device tree node for a given alias 1644 * 1645 * This function locates the device tree node of a given alias, and then 1646 * verifies that the physical address of that device matches the given 1647 * parameter. It displays a message if there is a mismatch. 1648 * 1649 * Returns 1 on success, 0 on failure 1650 */ 1651 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1652 { 1653 const char *path; 1654 const fdt32_t *reg; 1655 int node, len; 1656 u64 dt_addr; 1657 1658 path = fdt_getprop(fdt, anode, alias, NULL); 1659 if (!path) { 1660 /* If there's no such alias, then it's not a failure */ 1661 return 1; 1662 } 1663 1664 node = fdt_path_offset(fdt, path); 1665 if (node < 0) { 1666 printf("Warning: device tree alias '%s' points to invalid " 1667 "node %s.\n", alias, path); 1668 return 0; 1669 } 1670 1671 reg = fdt_getprop(fdt, node, "reg", &len); 1672 if (!reg) { 1673 printf("Warning: device tree node '%s' has no address.\n", 1674 path); 1675 return 0; 1676 } 1677 1678 dt_addr = fdt_translate_address(fdt, node, reg); 1679 if (addr != dt_addr) { 1680 printf("Warning: U-Boot configured device %s at address %" 1681 PRIx64 ",\n but the device tree has it address %" 1682 PRIx64 ".\n", alias, addr, dt_addr); 1683 return 0; 1684 } 1685 1686 return 1; 1687 } 1688 1689 /* 1690 * Returns the base address of an SOC or PCI node 1691 */ 1692 u64 fdt_get_base_address(const void *fdt, int node) 1693 { 1694 int size; 1695 const fdt32_t *prop; 1696 1697 prop = fdt_getprop(fdt, node, "reg", &size); 1698 1699 return prop ? fdt_translate_address(fdt, node, prop) : 0; 1700 } 1701 1702 /* 1703 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1704 */ 1705 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1706 uint64_t *val, int cells) 1707 { 1708 const fdt32_t *prop32 = &prop[cell_off]; 1709 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1710 1711 if ((cell_off + cells) > prop_len) 1712 return -FDT_ERR_NOSPACE; 1713 1714 switch (cells) { 1715 case 1: 1716 *val = fdt32_to_cpu(*prop32); 1717 break; 1718 case 2: 1719 *val = fdt64_to_cpu(*prop64); 1720 break; 1721 default: 1722 return -FDT_ERR_NOSPACE; 1723 } 1724 1725 return 0; 1726 } 1727 1728 /** 1729 * fdt_read_range - Read a node's n'th range property 1730 * 1731 * @fdt: ptr to device tree 1732 * @node: offset of node 1733 * @n: range index 1734 * @child_addr: pointer to storage for the "child address" field 1735 * @addr: pointer to storage for the CPU view translated physical start 1736 * @len: pointer to storage for the range length 1737 * 1738 * Convenience function that reads and interprets a specific range out of 1739 * a number of the "ranges" property array. 1740 */ 1741 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1742 uint64_t *addr, uint64_t *len) 1743 { 1744 int pnode = fdt_parent_offset(fdt, node); 1745 const fdt32_t *ranges; 1746 int pacells; 1747 int acells; 1748 int scells; 1749 int ranges_len; 1750 int cell = 0; 1751 int r = 0; 1752 1753 /* 1754 * The "ranges" property is an array of 1755 * { <child address> <parent address> <size in child address space> } 1756 * 1757 * All 3 elements can span a diffent number of cells. Fetch their size. 1758 */ 1759 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1760 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1761 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1762 1763 /* Now try to get the ranges property */ 1764 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1765 if (!ranges) 1766 return -FDT_ERR_NOTFOUND; 1767 ranges_len /= sizeof(uint32_t); 1768 1769 /* Jump to the n'th entry */ 1770 cell = n * (pacells + acells + scells); 1771 1772 /* Read <child address> */ 1773 if (child_addr) { 1774 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1775 acells); 1776 if (r) 1777 return r; 1778 } 1779 cell += acells; 1780 1781 /* Read <parent address> */ 1782 if (addr) 1783 *addr = fdt_translate_address(fdt, node, ranges + cell); 1784 cell += pacells; 1785 1786 /* Read <size in child address space> */ 1787 if (len) { 1788 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1789 if (r) 1790 return r; 1791 } 1792 1793 return 0; 1794 } 1795 1796 /** 1797 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1798 * 1799 * @fdt: ptr to device tree 1800 * @node: offset of the simplefb node 1801 * @base_address: framebuffer base address 1802 * @width: width in pixels 1803 * @height: height in pixels 1804 * @stride: bytes per line 1805 * @format: pixel format string 1806 * 1807 * Convenience function to fill and enable a simplefb node. 1808 */ 1809 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1810 u32 height, u32 stride, const char *format) 1811 { 1812 char name[32]; 1813 fdt32_t cells[4]; 1814 int i, addrc, sizec, ret; 1815 1816 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1817 &addrc, &sizec); 1818 i = 0; 1819 if (addrc == 2) 1820 cells[i++] = cpu_to_fdt32(base_address >> 32); 1821 cells[i++] = cpu_to_fdt32(base_address); 1822 if (sizec == 2) 1823 cells[i++] = 0; 1824 cells[i++] = cpu_to_fdt32(height * stride); 1825 1826 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1827 if (ret < 0) 1828 return ret; 1829 1830 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1831 ret = fdt_set_name(fdt, node, name); 1832 if (ret < 0) 1833 return ret; 1834 1835 ret = fdt_setprop_u32(fdt, node, "width", width); 1836 if (ret < 0) 1837 return ret; 1838 1839 ret = fdt_setprop_u32(fdt, node, "height", height); 1840 if (ret < 0) 1841 return ret; 1842 1843 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1844 if (ret < 0) 1845 return ret; 1846 1847 ret = fdt_setprop_string(fdt, node, "format", format); 1848 if (ret < 0) 1849 return ret; 1850 1851 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1852 if (ret < 0) 1853 return ret; 1854 1855 return 0; 1856 } 1857 1858 /* 1859 * Update native-mode in display-timings from display environment variable. 1860 * The node to update are specified by path. 1861 */ 1862 int fdt_fixup_display(void *blob, const char *path, const char *display) 1863 { 1864 int off, toff; 1865 1866 if (!display || !path) 1867 return -FDT_ERR_NOTFOUND; 1868 1869 toff = fdt_path_offset(blob, path); 1870 if (toff >= 0) 1871 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1872 if (toff < 0) 1873 return toff; 1874 1875 for (off = fdt_first_subnode(blob, toff); 1876 off >= 0; 1877 off = fdt_next_subnode(blob, off)) { 1878 uint32_t h = fdt_get_phandle(blob, off); 1879 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1880 fdt32_to_cpu(h)); 1881 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1882 return fdt_setprop_u32(blob, toff, "native-mode", h); 1883 } 1884 return toff; 1885 } 1886 1887 #ifdef CONFIG_OF_LIBFDT_OVERLAY 1888 /** 1889 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting 1890 * 1891 * @fdt: ptr to device tree 1892 * @fdto: ptr to device tree overlay 1893 * 1894 * Convenience function to apply an overlay and display helpful messages 1895 * in the case of an error 1896 */ 1897 int fdt_overlay_apply_verbose(void *fdt, void *fdto) 1898 { 1899 int err; 1900 bool has_symbols; 1901 1902 err = fdt_path_offset(fdt, "/__symbols__"); 1903 has_symbols = err >= 0; 1904 1905 err = fdt_overlay_apply(fdt, fdto); 1906 if (err < 0) { 1907 printf("failed on fdt_overlay_apply(): %s\n", 1908 fdt_strerror(err)); 1909 if (!has_symbols) { 1910 printf("base fdt does did not have a /__symbols__ node\n"); 1911 printf("make sure you've compiled with -@\n"); 1912 } 1913 } 1914 return err; 1915 } 1916 #endif 1917