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 <exports.h> 12 #include <fdt_support.h> 13 #include <fdtdec.h> 14 #include <inttypes.h> 15 #ifdef CONFIG_MTD_BLK 16 #include <mtd_blk.h> 17 #endif 18 #include <stdio_dev.h> 19 #include <asm/arch/hotkey.h> 20 #include <asm/global_data.h> 21 #include <linux/ctype.h> 22 #include <linux/libfdt.h> 23 #include <linux/types.h> 24 25 /** 26 * fdt_getprop_u32_default_node - Return a node's property or a default 27 * 28 * @fdt: ptr to device tree 29 * @off: offset of node 30 * @cell: cell offset in property 31 * @prop: property name 32 * @dflt: default value if the property isn't found 33 * 34 * Convenience function to return a node's property or a default value if 35 * the property doesn't exist. 36 */ 37 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, 38 const char *prop, const u32 dflt) 39 { 40 const fdt32_t *val; 41 int len; 42 43 val = fdt_getprop(fdt, off, prop, &len); 44 45 /* Check if property exists */ 46 if (!val) 47 return dflt; 48 49 /* Check if property is long enough */ 50 if (len < ((cell + 1) * sizeof(uint32_t))) 51 return dflt; 52 53 return fdt32_to_cpu(*val); 54 } 55 56 /** 57 * fdt_getprop_u32_default - Find a node and return it's property or a default 58 * 59 * @fdt: ptr to device tree 60 * @path: path of node 61 * @prop: property name 62 * @dflt: default value if the property isn't found 63 * 64 * Convenience function to find a node and return it's property or a 65 * default value if it doesn't exist. 66 */ 67 u32 fdt_getprop_u32_default(const void *fdt, const char *path, 68 const char *prop, const u32 dflt) 69 { 70 int off; 71 72 off = fdt_path_offset(fdt, path); 73 if (off < 0) 74 return dflt; 75 76 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); 77 } 78 79 /** 80 * fdt_find_and_setprop: Find a node and set it's property 81 * 82 * @fdt: ptr to device tree 83 * @node: path of node 84 * @prop: property name 85 * @val: ptr to new value 86 * @len: length of new property value 87 * @create: flag to create the property if it doesn't exist 88 * 89 * Convenience function to directly set a property given the path to the node. 90 */ 91 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 92 const void *val, int len, int create) 93 { 94 int nodeoff = fdt_path_offset(fdt, node); 95 96 if (nodeoff < 0) 97 return nodeoff; 98 99 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) 100 return 0; /* create flag not set; so exit quietly */ 101 102 return fdt_setprop(fdt, nodeoff, prop, val, len); 103 } 104 105 /** 106 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node 107 * 108 * @fdt: pointer to the device tree blob 109 * @parentoffset: structure block offset of a node 110 * @name: name of the subnode to locate 111 * 112 * fdt_subnode_offset() finds a subnode of the node with a given name. 113 * If the subnode does not exist, it will be created. 114 */ 115 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) 116 { 117 int offset; 118 119 offset = fdt_subnode_offset(fdt, parentoffset, name); 120 121 if (offset == -FDT_ERR_NOTFOUND) 122 offset = fdt_add_subnode(fdt, parentoffset, name); 123 124 if (offset < 0) 125 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset)); 126 127 return offset; 128 } 129 130 /* rename to CONFIG_OF_STDOUT_PATH ? */ 131 #if defined(OF_STDOUT_PATH) 132 static int fdt_fixup_stdout(void *fdt, int chosenoff) 133 { 134 return fdt_setprop(fdt, chosenoff, "linux,stdout-path", 135 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); 136 } 137 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) 138 static int fdt_fixup_stdout(void *fdt, int chosenoff) 139 { 140 int err; 141 int aliasoff; 142 char sername[9] = { 0 }; 143 const void *path; 144 int len; 145 char tmp[256]; /* long enough */ 146 147 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 148 149 aliasoff = fdt_path_offset(fdt, "/aliases"); 150 if (aliasoff < 0) { 151 err = aliasoff; 152 goto noalias; 153 } 154 155 path = fdt_getprop(fdt, aliasoff, sername, &len); 156 if (!path) { 157 err = len; 158 goto noalias; 159 } 160 161 /* fdt_setprop may break "path" so we copy it to tmp buffer */ 162 memcpy(tmp, path, len); 163 164 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); 165 if (err < 0) 166 printf("WARNING: could not set linux,stdout-path %s.\n", 167 fdt_strerror(err)); 168 169 return err; 170 171 noalias: 172 printf("WARNING: %s: could not read %s alias: %s\n", 173 __func__, sername, fdt_strerror(err)); 174 175 return 0; 176 } 177 #else 178 static int fdt_fixup_stdout(void *fdt, int chosenoff) 179 { 180 return 0; 181 } 182 #endif 183 184 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, 185 uint64_t val, int is_u64) 186 { 187 if (is_u64) 188 return fdt_setprop_u64(fdt, nodeoffset, name, val); 189 else 190 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); 191 } 192 193 int fdt_root(void *fdt) 194 { 195 char *serial; 196 int err; 197 198 err = fdt_check_header(fdt); 199 if (err < 0) { 200 printf("fdt_root: %s\n", fdt_strerror(err)); 201 return err; 202 } 203 204 serial = env_get("serial#"); 205 if (serial) { 206 err = fdt_setprop(fdt, 0, "serial-number", serial, 207 strlen(serial) + 1); 208 209 if (err < 0) { 210 printf("WARNING: could not set serial-number %s.\n", 211 fdt_strerror(err)); 212 return err; 213 } 214 } 215 216 return 0; 217 } 218 219 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) 220 { 221 int nodeoffset; 222 int err, j, total; 223 int is_u64; 224 uint64_t addr, size; 225 226 /* just return if the size of initrd is zero */ 227 if (initrd_start == initrd_end) 228 return 0; 229 230 /* find or create "/chosen" node. */ 231 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 232 if (nodeoffset < 0) 233 return nodeoffset; 234 235 total = fdt_num_mem_rsv(fdt); 236 237 /* 238 * Look for an existing entry and update it. If we don't find 239 * the entry, we will j be the next available slot. 240 */ 241 for (j = 0; j < total; j++) { 242 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 243 if (addr == initrd_start) { 244 fdt_del_mem_rsv(fdt, j); 245 break; 246 } 247 } 248 249 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 250 if (err < 0) { 251 printf("fdt_initrd: %s\n", fdt_strerror(err)); 252 return err; 253 } 254 255 is_u64 = (fdt_address_cells(fdt, 0) == 2); 256 257 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", 258 (uint64_t)initrd_start, is_u64); 259 260 if (err < 0) { 261 printf("WARNING: could not set linux,initrd-start %s.\n", 262 fdt_strerror(err)); 263 return err; 264 } 265 266 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", 267 (uint64_t)initrd_end, is_u64); 268 269 if (err < 0) { 270 printf("WARNING: could not set linux,initrd-end %s.\n", 271 fdt_strerror(err)); 272 273 return err; 274 } 275 276 return 0; 277 } 278 279 int fdt_chosen(void *fdt) 280 { 281 /* 282 * "bootargs_ext" is used when dtbo is applied. 283 */ 284 const char *arr_bootargs[] = { "bootargs", "bootargs_ext" }; 285 int nodeoffset; 286 int err; 287 int i; 288 char *str; /* used to set string properties */ 289 int dump; 290 291 dump = is_hotkey(HK_CMDLINE); 292 293 err = fdt_check_header(fdt); 294 if (err < 0) { 295 printf("fdt_chosen: %s\n", fdt_strerror(err)); 296 return err; 297 } 298 299 /* find or create "/chosen" node. */ 300 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 301 if (nodeoffset < 0) 302 return nodeoffset; 303 304 str = env_get("bootargs"); 305 if (str) { 306 #ifdef CONFIG_ARCH_ROCKCHIP 307 const char *bootargs; 308 309 if (dump) 310 printf("## U-Boot bootargs: %s\n", str); 311 312 for (i = 0; i < ARRAY_SIZE(arr_bootargs); i++) { 313 bootargs = fdt_getprop(fdt, nodeoffset, 314 arr_bootargs[i], NULL); 315 if (bootargs) { 316 if (dump) 317 printf("## Kernel %s: %s\n", 318 arr_bootargs[i], bootargs); 319 /* 320 * Append kernel bootargs 321 * If use AB system, delete default "root=" which route 322 * to rootfs. Then the ab bootctl will choose the 323 * high priority system to boot and add its UUID 324 * to cmdline. The format is "roo=PARTUUID=xxxx...". 325 */ 326 hotkey_run(HK_INITCALL); 327 #ifdef CONFIG_ANDROID_AB 328 env_update_filter("bootargs", bootargs, "root="); 329 #else 330 env_update("bootargs", bootargs); 331 #endif 332 #ifdef CONFIG_MTD_BLK 333 char *mtd_par_info = mtd_part_parse(); 334 335 if (mtd_par_info) { 336 if (memcmp(env_get("devtype"), "mtd", 3) == 0) 337 env_update("bootargs", mtd_par_info); 338 } 339 #endif 340 /* 341 * Initrd fixup: remove unused "initrd=0x...,0x...", 342 * this for compatible with legacy parameter.txt 343 */ 344 env_delete("bootargs", "initrd=", 0); 345 } 346 #endif 347 } 348 349 str = env_get("bootargs"); 350 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 351 strlen(str) + 1); 352 if (err < 0) { 353 printf("WARNING: could not set bootargs %s.\n", 354 fdt_strerror(err)); 355 return err; 356 } 357 } 358 359 if (dump) 360 printf("## Merged bootargs: %s\n", env_get("bootargs")); 361 362 return fdt_fixup_stdout(fdt, nodeoffset); 363 } 364 365 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 366 const void *val, int len, int create) 367 { 368 #if defined(DEBUG) 369 int i; 370 debug("Updating property '%s/%s' = ", path, prop); 371 for (i = 0; i < len; i++) 372 debug(" %.2x", *(u8*)(val+i)); 373 debug("\n"); 374 #endif 375 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 376 if (rc) 377 printf("Unable to update property %s:%s, err=%s\n", 378 path, prop, fdt_strerror(rc)); 379 } 380 381 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 382 u32 val, int create) 383 { 384 fdt32_t tmp = cpu_to_fdt32(val); 385 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 386 } 387 388 void do_fixup_by_prop(void *fdt, 389 const char *pname, const void *pval, int plen, 390 const char *prop, const void *val, int len, 391 int create) 392 { 393 int off; 394 #if defined(DEBUG) 395 int i; 396 debug("Updating property '%s' = ", prop); 397 for (i = 0; i < len; i++) 398 debug(" %.2x", *(u8*)(val+i)); 399 debug("\n"); 400 #endif 401 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 402 while (off != -FDT_ERR_NOTFOUND) { 403 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 404 fdt_setprop(fdt, off, prop, val, len); 405 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 406 } 407 } 408 409 void do_fixup_by_prop_u32(void *fdt, 410 const char *pname, const void *pval, int plen, 411 const char *prop, u32 val, int create) 412 { 413 fdt32_t tmp = cpu_to_fdt32(val); 414 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 415 } 416 417 void do_fixup_by_compat(void *fdt, const char *compat, 418 const char *prop, const void *val, int len, int create) 419 { 420 int off = -1; 421 #if defined(DEBUG) 422 int i; 423 debug("Updating property '%s' = ", prop); 424 for (i = 0; i < len; i++) 425 debug(" %.2x", *(u8*)(val+i)); 426 debug("\n"); 427 #endif 428 off = fdt_node_offset_by_compatible(fdt, -1, compat); 429 while (off != -FDT_ERR_NOTFOUND) { 430 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 431 fdt_setprop(fdt, off, prop, val, len); 432 off = fdt_node_offset_by_compatible(fdt, off, compat); 433 } 434 } 435 436 void do_fixup_by_compat_u32(void *fdt, const char *compat, 437 const char *prop, u32 val, int create) 438 { 439 fdt32_t tmp = cpu_to_fdt32(val); 440 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 441 } 442 443 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY 444 /* 445 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 446 */ 447 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 448 int n) 449 { 450 int i; 451 int address_cells = fdt_address_cells(fdt, 0); 452 int size_cells = fdt_size_cells(fdt, 0); 453 char *p = buf; 454 455 for (i = 0; i < n; i++) { 456 if (address_cells == 2) 457 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 458 else 459 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 460 p += 4 * address_cells; 461 462 if (size_cells == 2) 463 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 464 else 465 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 466 p += 4 * size_cells; 467 } 468 469 return p - (char *)buf; 470 } 471 472 int fdt_record_loadable(void *blob, u32 index, const char *name, 473 uintptr_t load_addr, u32 size, uintptr_t entry_point, 474 const char *type, const char *os) 475 { 476 int err, node; 477 478 err = fdt_check_header(blob); 479 if (err < 0) { 480 printf("%s: %s\n", __func__, fdt_strerror(err)); 481 return err; 482 } 483 484 /* find or create "/fit-images" node */ 485 node = fdt_find_or_add_subnode(blob, 0, "fit-images"); 486 if (node < 0) 487 return node; 488 489 /* find or create "/fit-images/<name>" node */ 490 node = fdt_find_or_add_subnode(blob, node, name); 491 if (node < 0) 492 return node; 493 494 /* 495 * We record these as 32bit entities, possibly truncating addresses. 496 * However, spl_fit.c is not 64bit safe either: i.e. we should not 497 * have an issue here. 498 */ 499 fdt_setprop_u32(blob, node, "load-addr", load_addr); 500 if (entry_point != -1) 501 fdt_setprop_u32(blob, node, "entry-point", entry_point); 502 fdt_setprop_u32(blob, node, "size", size); 503 if (type) 504 fdt_setprop_string(blob, node, "type", type); 505 if (os) 506 fdt_setprop_string(blob, node, "os", os); 507 508 return node; 509 } 510 511 #ifdef CONFIG_NR_DRAM_BANKS 512 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 513 #else 514 #define MEMORY_BANKS_MAX 4 515 #endif 516 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 517 { 518 int err, nodeoffset; 519 int len; 520 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 521 522 if (banks > MEMORY_BANKS_MAX) { 523 printf("%s: num banks %d exceeds hardcoded limit %d." 524 " Recompile with higher MEMORY_BANKS_MAX?\n", 525 __FUNCTION__, banks, MEMORY_BANKS_MAX); 526 return -1; 527 } 528 529 err = fdt_check_header(blob); 530 if (err < 0) { 531 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 532 return err; 533 } 534 535 /* find or create "/memory" node. */ 536 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 537 if (nodeoffset < 0) 538 return nodeoffset; 539 540 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 541 sizeof("memory")); 542 if (err < 0) { 543 printf("WARNING: could not set %s %s.\n", "device_type", 544 fdt_strerror(err)); 545 return err; 546 } 547 548 if (!banks) 549 return 0; 550 551 len = fdt_pack_reg(blob, tmp, start, size, banks); 552 553 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 554 if (err < 0) { 555 printf("WARNING: could not set %s %s.\n", 556 "reg", fdt_strerror(err)); 557 return err; 558 } 559 return 0; 560 } 561 562 int fdt_fixup_memory(void *blob, u64 start, u64 size) 563 { 564 return fdt_fixup_memory_banks(blob, &start, &size, 1); 565 } 566 567 int fdt_update_reserved_memory(void *blob, char *name, u64 start, u64 size) 568 { 569 int nodeoffset, len, err; 570 u8 tmp[16]; /* Up to 64-bit address + 64-bit size */ 571 572 #if 0 573 /*name is rockchip_logo*/ 574 nodeoffset = fdt_find_or_add_subnode(blob, 0, "reserved-memory"); 575 if (nodeoffset < 0) 576 return nodeoffset; 577 printf("hjc>>reserved-memory>>%s, nodeoffset:%d\n", __func__, nodeoffset); 578 nodeoffset = fdt_find_or_add_subnode(blob, nodeoffset, name); 579 if (nodeoffset < 0) 580 return nodeoffset; 581 #else 582 nodeoffset = fdt_node_offset_by_compatible(blob, 0, name); 583 if (nodeoffset < 0) 584 debug("Can't find nodeoffset: %d\n", nodeoffset); 585 #endif 586 len = fdt_pack_reg(blob, tmp, &start, &size, 1); 587 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 588 if (err < 0) { 589 printf("WARNING: could not set %s %s.\n", 590 "reg", fdt_strerror(err)); 591 return err; 592 } 593 594 return nodeoffset; 595 } 596 #endif 597 598 void fdt_fixup_ethernet(void *fdt) 599 { 600 int i = 0, j, prop; 601 char *tmp, *end; 602 char mac[16]; 603 const char *path; 604 unsigned char mac_addr[ARP_HLEN]; 605 int offset; 606 #ifdef FDT_SEQ_MACADDR_FROM_ENV 607 int nodeoff; 608 const struct fdt_property *fdt_prop; 609 #endif 610 611 if (fdt_path_offset(fdt, "/aliases") < 0) 612 return; 613 614 /* Cycle through all aliases */ 615 for (prop = 0; ; prop++) { 616 const char *name; 617 618 /* FDT might have been edited, recompute the offset */ 619 offset = fdt_first_property_offset(fdt, 620 fdt_path_offset(fdt, "/aliases")); 621 /* Select property number 'prop' */ 622 for (j = 0; j < prop; j++) 623 offset = fdt_next_property_offset(fdt, offset); 624 625 if (offset < 0) 626 break; 627 628 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 629 if (!strncmp(name, "ethernet", 8)) { 630 /* Treat plain "ethernet" same as "ethernet0". */ 631 if (!strcmp(name, "ethernet") 632 #ifdef FDT_SEQ_MACADDR_FROM_ENV 633 || !strcmp(name, "ethernet0") 634 #endif 635 ) 636 i = 0; 637 #ifndef FDT_SEQ_MACADDR_FROM_ENV 638 else 639 i = trailing_strtol(name); 640 #endif 641 if (i != -1) { 642 if (i == 0) 643 strcpy(mac, "ethaddr"); 644 else 645 sprintf(mac, "eth%daddr", i); 646 } else { 647 continue; 648 } 649 #ifdef FDT_SEQ_MACADDR_FROM_ENV 650 nodeoff = fdt_path_offset(fdt, path); 651 fdt_prop = fdt_get_property(fdt, nodeoff, "status", 652 NULL); 653 if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) 654 continue; 655 i++; 656 #endif 657 tmp = env_get(mac); 658 if (!tmp) 659 continue; 660 661 for (j = 0; j < 6; j++) { 662 mac_addr[j] = tmp ? 663 simple_strtoul(tmp, &end, 16) : 0; 664 if (tmp) 665 tmp = (*end) ? end + 1 : end; 666 } 667 668 do_fixup_by_path(fdt, path, "mac-address", 669 &mac_addr, 6, 0); 670 do_fixup_by_path(fdt, path, "local-mac-address", 671 &mac_addr, 6, 1); 672 } 673 } 674 } 675 676 /* Resize the fdt to its actual size + a bit of padding */ 677 int fdt_shrink_to_minimum(void *blob, uint extrasize) 678 { 679 int i; 680 uint64_t addr, size; 681 int total, ret; 682 uint actualsize; 683 684 if (!blob) 685 return 0; 686 687 total = fdt_num_mem_rsv(blob); 688 for (i = 0; i < total; i++) { 689 fdt_get_mem_rsv(blob, i, &addr, &size); 690 if (addr == (uintptr_t)blob) { 691 fdt_del_mem_rsv(blob, i); 692 break; 693 } 694 } 695 696 /* 697 * Calculate the actual size of the fdt 698 * plus the size needed for 5 fdt_add_mem_rsv, one 699 * for the fdt itself and 4 for a possible initrd 700 * ((initrd-start + initrd-end) * 2 (name & value)) 701 */ 702 actualsize = fdt_off_dt_strings(blob) + 703 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 704 705 actualsize += extrasize; 706 /* Make it so the fdt ends on a page boundary */ 707 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 708 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 709 710 /* Change the fdt header to reflect the correct size */ 711 fdt_set_totalsize(blob, actualsize); 712 713 /* Add the new reservation */ 714 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 715 if (ret < 0) 716 return ret; 717 718 return actualsize; 719 } 720 721 #ifdef CONFIG_PCI 722 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 723 724 #define FDT_PCI_PREFETCH (0x40000000) 725 #define FDT_PCI_MEM32 (0x02000000) 726 #define FDT_PCI_IO (0x01000000) 727 #define FDT_PCI_MEM64 (0x03000000) 728 729 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 730 731 int addrcell, sizecell, len, r; 732 u32 *dma_range; 733 /* sized based on pci addr cells, size-cells, & address-cells */ 734 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 735 736 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 737 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 738 739 dma_range = &dma_ranges[0]; 740 for (r = 0; r < hose->region_count; r++) { 741 u64 bus_start, phys_start, size; 742 743 /* skip if !PCI_REGION_SYS_MEMORY */ 744 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 745 continue; 746 747 bus_start = (u64)hose->regions[r].bus_start; 748 phys_start = (u64)hose->regions[r].phys_start; 749 size = (u64)hose->regions[r].size; 750 751 dma_range[0] = 0; 752 if (size >= 0x100000000ull) 753 dma_range[0] |= FDT_PCI_MEM64; 754 else 755 dma_range[0] |= FDT_PCI_MEM32; 756 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 757 dma_range[0] |= FDT_PCI_PREFETCH; 758 #ifdef CONFIG_SYS_PCI_64BIT 759 dma_range[1] = bus_start >> 32; 760 #else 761 dma_range[1] = 0; 762 #endif 763 dma_range[2] = bus_start & 0xffffffff; 764 765 if (addrcell == 2) { 766 dma_range[3] = phys_start >> 32; 767 dma_range[4] = phys_start & 0xffffffff; 768 } else { 769 dma_range[3] = phys_start & 0xffffffff; 770 } 771 772 if (sizecell == 2) { 773 dma_range[3 + addrcell + 0] = size >> 32; 774 dma_range[3 + addrcell + 1] = size & 0xffffffff; 775 } else { 776 dma_range[3 + addrcell + 0] = size & 0xffffffff; 777 } 778 779 dma_range += (3 + addrcell + sizecell); 780 } 781 782 len = dma_range - &dma_ranges[0]; 783 if (len) 784 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 785 786 return 0; 787 } 788 #endif 789 790 int fdt_increase_size(void *fdt, int add_len) 791 { 792 int newlen; 793 794 newlen = fdt_totalsize(fdt) + add_len; 795 796 /* Open in place with a new len */ 797 return fdt_open_into(fdt, fdt, newlen); 798 } 799 800 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 801 #include <jffs2/load_kernel.h> 802 #include <mtd_node.h> 803 804 struct reg_cell { 805 unsigned int r0; 806 unsigned int r1; 807 }; 808 809 int fdt_del_subnodes(const void *blob, int parent_offset) 810 { 811 int off, ndepth; 812 int ret; 813 814 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 815 (off >= 0) && (ndepth > 0); 816 off = fdt_next_node(blob, off, &ndepth)) { 817 if (ndepth == 1) { 818 debug("delete %s: offset: %x\n", 819 fdt_get_name(blob, off, 0), off); 820 ret = fdt_del_node((void *)blob, off); 821 if (ret < 0) { 822 printf("Can't delete node: %s\n", 823 fdt_strerror(ret)); 824 return ret; 825 } else { 826 ndepth = 0; 827 off = parent_offset; 828 } 829 } 830 } 831 return 0; 832 } 833 834 int fdt_del_partitions(void *blob, int parent_offset) 835 { 836 const void *prop; 837 int ndepth = 0; 838 int off; 839 int ret; 840 841 off = fdt_next_node(blob, parent_offset, &ndepth); 842 if (off > 0 && ndepth == 1) { 843 prop = fdt_getprop(blob, off, "label", NULL); 844 if (prop == NULL) { 845 /* 846 * Could not find label property, nand {}; node? 847 * Check subnode, delete partitions there if any. 848 */ 849 return fdt_del_partitions(blob, off); 850 } else { 851 ret = fdt_del_subnodes(blob, parent_offset); 852 if (ret < 0) { 853 printf("Can't remove subnodes: %s\n", 854 fdt_strerror(ret)); 855 return ret; 856 } 857 } 858 } 859 return 0; 860 } 861 862 int fdt_node_set_part_info(void *blob, int parent_offset, 863 struct mtd_device *dev) 864 { 865 struct list_head *pentry; 866 struct part_info *part; 867 struct reg_cell cell; 868 int off, ndepth = 0; 869 int part_num, ret; 870 char buf[64]; 871 872 ret = fdt_del_partitions(blob, parent_offset); 873 if (ret < 0) 874 return ret; 875 876 /* 877 * Check if it is nand {}; subnode, adjust 878 * the offset in this case 879 */ 880 off = fdt_next_node(blob, parent_offset, &ndepth); 881 if (off > 0 && ndepth == 1) 882 parent_offset = off; 883 884 part_num = 0; 885 list_for_each_prev(pentry, &dev->parts) { 886 int newoff; 887 888 part = list_entry(pentry, struct part_info, link); 889 890 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 891 part_num, part->name, part->size, 892 part->offset, part->mask_flags); 893 894 sprintf(buf, "partition@%llx", part->offset); 895 add_sub: 896 ret = fdt_add_subnode(blob, parent_offset, buf); 897 if (ret == -FDT_ERR_NOSPACE) { 898 ret = fdt_increase_size(blob, 512); 899 if (!ret) 900 goto add_sub; 901 else 902 goto err_size; 903 } else if (ret < 0) { 904 printf("Can't add partition node: %s\n", 905 fdt_strerror(ret)); 906 return ret; 907 } 908 newoff = ret; 909 910 /* Check MTD_WRITEABLE_CMD flag */ 911 if (part->mask_flags & 1) { 912 add_ro: 913 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 914 if (ret == -FDT_ERR_NOSPACE) { 915 ret = fdt_increase_size(blob, 512); 916 if (!ret) 917 goto add_ro; 918 else 919 goto err_size; 920 } else if (ret < 0) 921 goto err_prop; 922 } 923 924 cell.r0 = cpu_to_fdt32(part->offset); 925 cell.r1 = cpu_to_fdt32(part->size); 926 add_reg: 927 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 928 if (ret == -FDT_ERR_NOSPACE) { 929 ret = fdt_increase_size(blob, 512); 930 if (!ret) 931 goto add_reg; 932 else 933 goto err_size; 934 } else if (ret < 0) 935 goto err_prop; 936 937 add_label: 938 ret = fdt_setprop_string(blob, newoff, "label", part->name); 939 if (ret == -FDT_ERR_NOSPACE) { 940 ret = fdt_increase_size(blob, 512); 941 if (!ret) 942 goto add_label; 943 else 944 goto err_size; 945 } else if (ret < 0) 946 goto err_prop; 947 948 part_num++; 949 } 950 return 0; 951 err_size: 952 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 953 return ret; 954 err_prop: 955 printf("Can't add property: %s\n", fdt_strerror(ret)); 956 return ret; 957 } 958 959 /* 960 * Update partitions in nor/nand nodes using info from 961 * mtdparts environment variable. The nodes to update are 962 * specified by node_info structure which contains mtd device 963 * type and compatible string: E. g. the board code in 964 * ft_board_setup() could use: 965 * 966 * struct node_info nodes[] = { 967 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 968 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 969 * }; 970 * 971 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 972 */ 973 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 974 { 975 struct node_info *ni = node_info; 976 struct mtd_device *dev; 977 int i, idx; 978 int noff; 979 980 if (mtdparts_init() != 0) 981 return; 982 983 for (i = 0; i < node_info_size; i++) { 984 idx = 0; 985 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 986 while (noff != -FDT_ERR_NOTFOUND) { 987 debug("%s: %s, mtd dev type %d\n", 988 fdt_get_name(blob, noff, 0), 989 ni[i].compat, ni[i].type); 990 dev = device_find(ni[i].type, idx++); 991 if (dev) { 992 if (fdt_node_set_part_info(blob, noff, dev)) 993 return; /* return on error */ 994 } 995 996 /* Jump to next flash node */ 997 noff = fdt_node_offset_by_compatible(blob, noff, 998 ni[i].compat); 999 } 1000 } 1001 } 1002 #endif 1003 1004 void fdt_del_node_and_alias(void *blob, const char *alias) 1005 { 1006 int off = fdt_path_offset(blob, alias); 1007 1008 if (off < 0) 1009 return; 1010 1011 fdt_del_node(blob, off); 1012 1013 off = fdt_path_offset(blob, "/aliases"); 1014 fdt_delprop(blob, off, alias); 1015 } 1016 1017 /* Max address size we deal with */ 1018 #define OF_MAX_ADDR_CELLS 4 1019 #define OF_BAD_ADDR FDT_ADDR_T_NONE 1020 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 1021 (ns) > 0) 1022 1023 /* Debug utility */ 1024 #ifdef DEBUG 1025 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 1026 { 1027 printf("%s", s); 1028 while(na--) 1029 printf(" %08x", *(addr++)); 1030 printf("\n"); 1031 } 1032 #else 1033 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 1034 #endif 1035 1036 /** 1037 * struct of_bus - Callbacks for bus specific translators 1038 * @name: A string used to identify this bus in debug output. 1039 * @addresses: The name of the DT property from which addresses are 1040 * to be read, typically "reg". 1041 * @match: Return non-zero if the node whose parent is at 1042 * parentoffset in the FDT blob corresponds to a bus 1043 * of this type, otherwise return zero. If NULL a match 1044 * is assumed. 1045 * @count_cells:Count how many cells (be32 values) a node whose parent 1046 * is at parentoffset in the FDT blob will require to 1047 * represent its address (written to *addrc) & size 1048 * (written to *sizec). 1049 * @map: Map the address addr from the address space of this 1050 * bus to that of its parent, making use of the ranges 1051 * read from DT to an array at range. na and ns are the 1052 * number of cells (be32 values) used to hold and address 1053 * or size, respectively, for this bus. pna is the number 1054 * of cells used to hold an address for the parent bus. 1055 * Returns the address in the address space of the parent 1056 * bus. 1057 * @translate: Update the value of the address cells at addr within an 1058 * FDT by adding offset to it. na specifies the number of 1059 * cells used to hold the address being translated. Returns 1060 * zero on success, non-zero on error. 1061 * 1062 * Each bus type will include a struct of_bus in the of_busses array, 1063 * providing implementations of some or all of the functions used to 1064 * match the bus & handle address translation for its children. 1065 */ 1066 struct of_bus { 1067 const char *name; 1068 const char *addresses; 1069 int (*match)(const void *blob, int parentoffset); 1070 void (*count_cells)(const void *blob, int parentoffset, 1071 int *addrc, int *sizec); 1072 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 1073 int na, int ns, int pna); 1074 int (*translate)(fdt32_t *addr, u64 offset, int na); 1075 }; 1076 1077 /* Default translator (generic bus) */ 1078 void fdt_support_default_count_cells(const void *blob, int parentoffset, 1079 int *addrc, int *sizec) 1080 { 1081 const fdt32_t *prop; 1082 1083 if (addrc) 1084 *addrc = fdt_address_cells(blob, parentoffset); 1085 1086 if (sizec) { 1087 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 1088 if (prop) 1089 *sizec = be32_to_cpup(prop); 1090 else 1091 *sizec = 1; 1092 } 1093 } 1094 1095 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1096 int na, int ns, int pna) 1097 { 1098 u64 cp, s, da; 1099 1100 cp = fdt_read_number(range, na); 1101 s = fdt_read_number(range + na + pna, ns); 1102 da = fdt_read_number(addr, na); 1103 1104 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 1105 ", da=%" PRIu64 "\n", cp, s, da); 1106 1107 if (da < cp || da >= (cp + s)) 1108 return OF_BAD_ADDR; 1109 return da - cp; 1110 } 1111 1112 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1113 { 1114 u64 a = fdt_read_number(addr, na); 1115 memset(addr, 0, na * 4); 1116 a += offset; 1117 if (na > 1) 1118 addr[na - 2] = cpu_to_fdt32(a >> 32); 1119 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1120 1121 return 0; 1122 } 1123 1124 #ifdef CONFIG_OF_ISA_BUS 1125 1126 /* ISA bus translator */ 1127 static int of_bus_isa_match(const void *blob, int parentoffset) 1128 { 1129 const char *name; 1130 1131 name = fdt_get_name(blob, parentoffset, NULL); 1132 if (!name) 1133 return 0; 1134 1135 return !strcmp(name, "isa"); 1136 } 1137 1138 static void of_bus_isa_count_cells(const void *blob, int parentoffset, 1139 int *addrc, int *sizec) 1140 { 1141 if (addrc) 1142 *addrc = 2; 1143 if (sizec) 1144 *sizec = 1; 1145 } 1146 1147 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range, 1148 int na, int ns, int pna) 1149 { 1150 u64 cp, s, da; 1151 1152 /* Check address type match */ 1153 if ((addr[0] ^ range[0]) & cpu_to_be32(1)) 1154 return OF_BAD_ADDR; 1155 1156 cp = fdt_read_number(range + 1, na - 1); 1157 s = fdt_read_number(range + na + pna, ns); 1158 da = fdt_read_number(addr + 1, na - 1); 1159 1160 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64 1161 ", da=%" PRIu64 "\n", cp, s, da); 1162 1163 if (da < cp || da >= (cp + s)) 1164 return OF_BAD_ADDR; 1165 return da - cp; 1166 } 1167 1168 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na) 1169 { 1170 return of_bus_default_translate(addr + 1, offset, na - 1); 1171 } 1172 1173 #endif /* CONFIG_OF_ISA_BUS */ 1174 1175 /* Array of bus specific translators */ 1176 static struct of_bus of_busses[] = { 1177 #ifdef CONFIG_OF_ISA_BUS 1178 /* ISA */ 1179 { 1180 .name = "isa", 1181 .addresses = "reg", 1182 .match = of_bus_isa_match, 1183 .count_cells = of_bus_isa_count_cells, 1184 .map = of_bus_isa_map, 1185 .translate = of_bus_isa_translate, 1186 }, 1187 #endif /* CONFIG_OF_ISA_BUS */ 1188 /* Default */ 1189 { 1190 .name = "default", 1191 .addresses = "reg", 1192 .count_cells = fdt_support_default_count_cells, 1193 .map = of_bus_default_map, 1194 .translate = of_bus_default_translate, 1195 }, 1196 }; 1197 1198 static struct of_bus *of_match_bus(const void *blob, int parentoffset) 1199 { 1200 struct of_bus *bus; 1201 1202 if (ARRAY_SIZE(of_busses) == 1) 1203 return of_busses; 1204 1205 for (bus = of_busses; bus; bus++) { 1206 if (!bus->match || bus->match(blob, parentoffset)) 1207 return bus; 1208 } 1209 1210 /* 1211 * We should always have matched the default bus at least, since 1212 * it has a NULL match field. If we didn't then it somehow isn't 1213 * in the of_busses array or something equally catastrophic has 1214 * gone wrong. 1215 */ 1216 assert(0); 1217 return NULL; 1218 } 1219 1220 static int of_translate_one(const void *blob, int parent, struct of_bus *bus, 1221 struct of_bus *pbus, fdt32_t *addr, 1222 int na, int ns, int pna, const char *rprop) 1223 { 1224 const fdt32_t *ranges; 1225 int rlen; 1226 int rone; 1227 u64 offset = OF_BAD_ADDR; 1228 1229 /* Normally, an absence of a "ranges" property means we are 1230 * crossing a non-translatable boundary, and thus the addresses 1231 * below the current not cannot be converted to CPU physical ones. 1232 * Unfortunately, while this is very clear in the spec, it's not 1233 * what Apple understood, and they do have things like /uni-n or 1234 * /ht nodes with no "ranges" property and a lot of perfectly 1235 * useable mapped devices below them. Thus we treat the absence of 1236 * "ranges" as equivalent to an empty "ranges" property which means 1237 * a 1:1 translation at that level. It's up to the caller not to try 1238 * to translate addresses that aren't supposed to be translated in 1239 * the first place. --BenH. 1240 */ 1241 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1242 if (ranges == NULL || rlen == 0) { 1243 offset = fdt_read_number(addr, na); 1244 memset(addr, 0, pna * 4); 1245 debug("OF: no ranges, 1:1 translation\n"); 1246 goto finish; 1247 } 1248 1249 debug("OF: walking ranges...\n"); 1250 1251 /* Now walk through the ranges */ 1252 rlen /= 4; 1253 rone = na + pna + ns; 1254 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1255 offset = bus->map(addr, ranges, na, ns, pna); 1256 if (offset != OF_BAD_ADDR) 1257 break; 1258 } 1259 if (offset == OF_BAD_ADDR) { 1260 debug("OF: not found !\n"); 1261 return 1; 1262 } 1263 memcpy(addr, ranges + na, 4 * pna); 1264 1265 finish: 1266 of_dump_addr("OF: parent translation for:", addr, pna); 1267 debug("OF: with offset: %" PRIu64 "\n", offset); 1268 1269 /* Translate it into parent bus space */ 1270 return pbus->translate(addr, offset, pna); 1271 } 1272 1273 /* 1274 * Translate an address from the device-tree into a CPU physical address, 1275 * this walks up the tree and applies the various bus mappings on the 1276 * way. 1277 * 1278 * Note: We consider that crossing any level with #size-cells == 0 to mean 1279 * that translation is impossible (that is we are not dealing with a value 1280 * that can be mapped to a cpu physical address). This is not really specified 1281 * that way, but this is traditionally the way IBM at least do things 1282 */ 1283 static u64 __of_translate_address(const void *blob, int node_offset, 1284 const fdt32_t *in_addr, const char *rprop) 1285 { 1286 int parent; 1287 struct of_bus *bus, *pbus; 1288 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1289 int na, ns, pna, pns; 1290 u64 result = OF_BAD_ADDR; 1291 1292 debug("OF: ** translation for device %s **\n", 1293 fdt_get_name(blob, node_offset, NULL)); 1294 1295 /* Get parent & match bus type */ 1296 parent = fdt_parent_offset(blob, node_offset); 1297 if (parent < 0) 1298 goto bail; 1299 bus = of_match_bus(blob, parent); 1300 1301 /* Cound address cells & copy address locally */ 1302 bus->count_cells(blob, parent, &na, &ns); 1303 if (!OF_CHECK_COUNTS(na, ns)) { 1304 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1305 fdt_get_name(blob, node_offset, NULL)); 1306 goto bail; 1307 } 1308 memcpy(addr, in_addr, na * 4); 1309 1310 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1311 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1312 of_dump_addr("OF: translating address:", addr, na); 1313 1314 /* Translate */ 1315 for (;;) { 1316 /* Switch to parent bus */ 1317 node_offset = parent; 1318 parent = fdt_parent_offset(blob, node_offset); 1319 1320 /* If root, we have finished */ 1321 if (parent < 0) { 1322 debug("OF: reached root node\n"); 1323 result = fdt_read_number(addr, na); 1324 break; 1325 } 1326 1327 /* Get new parent bus and counts */ 1328 pbus = of_match_bus(blob, parent); 1329 pbus->count_cells(blob, parent, &pna, &pns); 1330 if (!OF_CHECK_COUNTS(pna, pns)) { 1331 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1332 fdt_get_name(blob, node_offset, NULL)); 1333 break; 1334 } 1335 1336 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1337 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1338 1339 /* Apply bus translation */ 1340 if (of_translate_one(blob, node_offset, bus, pbus, 1341 addr, na, ns, pna, rprop)) 1342 break; 1343 1344 /* Complete the move up one level */ 1345 na = pna; 1346 ns = pns; 1347 bus = pbus; 1348 1349 of_dump_addr("OF: one level translation:", addr, na); 1350 } 1351 bail: 1352 1353 return result; 1354 } 1355 1356 u64 fdt_translate_address(const void *blob, int node_offset, 1357 const fdt32_t *in_addr) 1358 { 1359 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1360 } 1361 1362 /** 1363 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1364 * who's reg property matches a physical cpu address 1365 * 1366 * @blob: ptr to device tree 1367 * @compat: compatiable string to match 1368 * @compat_off: property name 1369 * 1370 */ 1371 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1372 phys_addr_t compat_off) 1373 { 1374 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1375 while (off != -FDT_ERR_NOTFOUND) { 1376 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1377 if (reg) { 1378 if (compat_off == fdt_translate_address(blob, off, reg)) 1379 return off; 1380 } 1381 off = fdt_node_offset_by_compatible(blob, off, compat); 1382 } 1383 1384 return -FDT_ERR_NOTFOUND; 1385 } 1386 1387 /** 1388 * fdt_alloc_phandle: Return next free phandle value 1389 * 1390 * @blob: ptr to device tree 1391 */ 1392 int fdt_alloc_phandle(void *blob) 1393 { 1394 int offset; 1395 uint32_t phandle = 0; 1396 1397 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1398 offset = fdt_next_node(blob, offset, NULL)) { 1399 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1400 } 1401 1402 return phandle + 1; 1403 } 1404 1405 /* 1406 * fdt_set_phandle: Create a phandle property for the given node 1407 * 1408 * @fdt: ptr to device tree 1409 * @nodeoffset: node to update 1410 * @phandle: phandle value to set (must be unique) 1411 */ 1412 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1413 { 1414 int ret; 1415 1416 #ifdef DEBUG 1417 int off = fdt_node_offset_by_phandle(fdt, phandle); 1418 1419 if ((off >= 0) && (off != nodeoffset)) { 1420 char buf[64]; 1421 1422 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1423 printf("Trying to update node %s with phandle %u ", 1424 buf, phandle); 1425 1426 fdt_get_path(fdt, off, buf, sizeof(buf)); 1427 printf("that already exists in node %s.\n", buf); 1428 return -FDT_ERR_BADPHANDLE; 1429 } 1430 #endif 1431 1432 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1433 if (ret < 0) 1434 return ret; 1435 1436 /* 1437 * For now, also set the deprecated "linux,phandle" property, so that we 1438 * don't break older kernels. 1439 */ 1440 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1441 1442 return ret; 1443 } 1444 1445 /* 1446 * fdt_create_phandle: Create a phandle property for the given node 1447 * 1448 * @fdt: ptr to device tree 1449 * @nodeoffset: node to update 1450 */ 1451 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1452 { 1453 /* see if there is a phandle already */ 1454 int phandle = fdt_get_phandle(fdt, nodeoffset); 1455 1456 /* if we got 0, means no phandle so create one */ 1457 if (phandle == 0) { 1458 int ret; 1459 1460 phandle = fdt_alloc_phandle(fdt); 1461 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1462 if (ret < 0) { 1463 printf("Can't set phandle %u: %s\n", phandle, 1464 fdt_strerror(ret)); 1465 return 0; 1466 } 1467 } 1468 1469 return phandle; 1470 } 1471 1472 /* 1473 * fdt_set_node_status: Set status for the given node 1474 * 1475 * @fdt: ptr to device tree 1476 * @nodeoffset: node to update 1477 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1478 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1479 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1480 */ 1481 int fdt_set_node_status(void *fdt, int nodeoffset, 1482 enum fdt_status status, unsigned int error_code) 1483 { 1484 char buf[16]; 1485 int ret = 0; 1486 1487 if (nodeoffset < 0) 1488 return nodeoffset; 1489 1490 switch (status) { 1491 case FDT_STATUS_OKAY: 1492 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1493 break; 1494 case FDT_STATUS_DISABLED: 1495 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1496 break; 1497 case FDT_STATUS_FAIL: 1498 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1499 break; 1500 case FDT_STATUS_FAIL_ERROR_CODE: 1501 sprintf(buf, "fail-%d", error_code); 1502 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1503 break; 1504 default: 1505 printf("Invalid fdt status: %x\n", status); 1506 ret = -1; 1507 break; 1508 } 1509 1510 return ret; 1511 } 1512 1513 /* 1514 * fdt_set_status_by_alias: Set status for the given node given an alias 1515 * 1516 * @fdt: ptr to device tree 1517 * @alias: alias of node to update 1518 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1519 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1520 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1521 */ 1522 int fdt_set_status_by_alias(void *fdt, const char* alias, 1523 enum fdt_status status, unsigned int error_code) 1524 { 1525 int offset = fdt_path_offset(fdt, alias); 1526 1527 return fdt_set_node_status(fdt, offset, status, error_code); 1528 } 1529 1530 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1531 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1532 { 1533 int noff; 1534 int ret; 1535 1536 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1537 if (noff != -FDT_ERR_NOTFOUND) { 1538 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1539 add_edid: 1540 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1541 if (ret == -FDT_ERR_NOSPACE) { 1542 ret = fdt_increase_size(blob, 512); 1543 if (!ret) 1544 goto add_edid; 1545 else 1546 goto err_size; 1547 } else if (ret < 0) { 1548 printf("Can't add property: %s\n", fdt_strerror(ret)); 1549 return ret; 1550 } 1551 } 1552 return 0; 1553 err_size: 1554 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1555 return ret; 1556 } 1557 #endif 1558 1559 /* 1560 * Verify the physical address of device tree node for a given alias 1561 * 1562 * This function locates the device tree node of a given alias, and then 1563 * verifies that the physical address of that device matches the given 1564 * parameter. It displays a message if there is a mismatch. 1565 * 1566 * Returns 1 on success, 0 on failure 1567 */ 1568 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1569 { 1570 const char *path; 1571 const fdt32_t *reg; 1572 int node, len; 1573 u64 dt_addr; 1574 1575 path = fdt_getprop(fdt, anode, alias, NULL); 1576 if (!path) { 1577 /* If there's no such alias, then it's not a failure */ 1578 return 1; 1579 } 1580 1581 node = fdt_path_offset(fdt, path); 1582 if (node < 0) { 1583 printf("Warning: device tree alias '%s' points to invalid " 1584 "node %s.\n", alias, path); 1585 return 0; 1586 } 1587 1588 reg = fdt_getprop(fdt, node, "reg", &len); 1589 if (!reg) { 1590 printf("Warning: device tree node '%s' has no address.\n", 1591 path); 1592 return 0; 1593 } 1594 1595 dt_addr = fdt_translate_address(fdt, node, reg); 1596 if (addr != dt_addr) { 1597 printf("Warning: U-Boot configured device %s at address %" 1598 PRIx64 ",\n but the device tree has it address %" 1599 PRIx64 ".\n", alias, addr, dt_addr); 1600 return 0; 1601 } 1602 1603 return 1; 1604 } 1605 1606 /* 1607 * Returns the base address of an SOC or PCI node 1608 */ 1609 u64 fdt_get_base_address(const void *fdt, int node) 1610 { 1611 int size; 1612 const fdt32_t *prop; 1613 1614 prop = fdt_getprop(fdt, node, "reg", &size); 1615 1616 return prop ? fdt_translate_address(fdt, node, prop) : 0; 1617 } 1618 1619 /* 1620 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1621 */ 1622 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1623 uint64_t *val, int cells) 1624 { 1625 const fdt32_t *prop32 = &prop[cell_off]; 1626 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1627 1628 if ((cell_off + cells) > prop_len) 1629 return -FDT_ERR_NOSPACE; 1630 1631 switch (cells) { 1632 case 1: 1633 *val = fdt32_to_cpu(*prop32); 1634 break; 1635 case 2: 1636 *val = fdt64_to_cpu(*prop64); 1637 break; 1638 default: 1639 return -FDT_ERR_NOSPACE; 1640 } 1641 1642 return 0; 1643 } 1644 1645 /** 1646 * fdt_read_range - Read a node's n'th range property 1647 * 1648 * @fdt: ptr to device tree 1649 * @node: offset of node 1650 * @n: range index 1651 * @child_addr: pointer to storage for the "child address" field 1652 * @addr: pointer to storage for the CPU view translated physical start 1653 * @len: pointer to storage for the range length 1654 * 1655 * Convenience function that reads and interprets a specific range out of 1656 * a number of the "ranges" property array. 1657 */ 1658 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1659 uint64_t *addr, uint64_t *len) 1660 { 1661 int pnode = fdt_parent_offset(fdt, node); 1662 const fdt32_t *ranges; 1663 int pacells; 1664 int acells; 1665 int scells; 1666 int ranges_len; 1667 int cell = 0; 1668 int r = 0; 1669 1670 /* 1671 * The "ranges" property is an array of 1672 * { <child address> <parent address> <size in child address space> } 1673 * 1674 * All 3 elements can span a diffent number of cells. Fetch their size. 1675 */ 1676 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1677 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1678 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1679 1680 /* Now try to get the ranges property */ 1681 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1682 if (!ranges) 1683 return -FDT_ERR_NOTFOUND; 1684 ranges_len /= sizeof(uint32_t); 1685 1686 /* Jump to the n'th entry */ 1687 cell = n * (pacells + acells + scells); 1688 1689 /* Read <child address> */ 1690 if (child_addr) { 1691 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1692 acells); 1693 if (r) 1694 return r; 1695 } 1696 cell += acells; 1697 1698 /* Read <parent address> */ 1699 if (addr) 1700 *addr = fdt_translate_address(fdt, node, ranges + cell); 1701 cell += pacells; 1702 1703 /* Read <size in child address space> */ 1704 if (len) { 1705 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1706 if (r) 1707 return r; 1708 } 1709 1710 return 0; 1711 } 1712 1713 /** 1714 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1715 * 1716 * @fdt: ptr to device tree 1717 * @node: offset of the simplefb node 1718 * @base_address: framebuffer base address 1719 * @width: width in pixels 1720 * @height: height in pixels 1721 * @stride: bytes per line 1722 * @format: pixel format string 1723 * 1724 * Convenience function to fill and enable a simplefb node. 1725 */ 1726 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1727 u32 height, u32 stride, const char *format) 1728 { 1729 char name[32]; 1730 fdt32_t cells[4]; 1731 int i, addrc, sizec, ret; 1732 1733 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1734 &addrc, &sizec); 1735 i = 0; 1736 if (addrc == 2) 1737 cells[i++] = cpu_to_fdt32(base_address >> 32); 1738 cells[i++] = cpu_to_fdt32(base_address); 1739 if (sizec == 2) 1740 cells[i++] = 0; 1741 cells[i++] = cpu_to_fdt32(height * stride); 1742 1743 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1744 if (ret < 0) 1745 return ret; 1746 1747 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1748 ret = fdt_set_name(fdt, node, name); 1749 if (ret < 0) 1750 return ret; 1751 1752 ret = fdt_setprop_u32(fdt, node, "width", width); 1753 if (ret < 0) 1754 return ret; 1755 1756 ret = fdt_setprop_u32(fdt, node, "height", height); 1757 if (ret < 0) 1758 return ret; 1759 1760 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1761 if (ret < 0) 1762 return ret; 1763 1764 ret = fdt_setprop_string(fdt, node, "format", format); 1765 if (ret < 0) 1766 return ret; 1767 1768 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1769 if (ret < 0) 1770 return ret; 1771 1772 return 0; 1773 } 1774 1775 /* 1776 * Update native-mode in display-timings from display environment variable. 1777 * The node to update are specified by path. 1778 */ 1779 int fdt_fixup_display(void *blob, const char *path, const char *display) 1780 { 1781 int off, toff; 1782 1783 if (!display || !path) 1784 return -FDT_ERR_NOTFOUND; 1785 1786 toff = fdt_path_offset(blob, path); 1787 if (toff >= 0) 1788 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1789 if (toff < 0) 1790 return toff; 1791 1792 for (off = fdt_first_subnode(blob, toff); 1793 off >= 0; 1794 off = fdt_next_subnode(blob, off)) { 1795 uint32_t h = fdt_get_phandle(blob, off); 1796 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1797 fdt32_to_cpu(h)); 1798 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1799 return fdt_setprop_u32(blob, toff, "native-mode", h); 1800 } 1801 return toff; 1802 } 1803 1804 #ifdef CONFIG_OF_LIBFDT_OVERLAY 1805 /** 1806 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting 1807 * 1808 * @fdt: ptr to device tree 1809 * @fdto: ptr to device tree overlay 1810 * 1811 * Convenience function to apply an overlay and display helpful messages 1812 * in the case of an error 1813 */ 1814 int fdt_overlay_apply_verbose(void *fdt, void *fdto) 1815 { 1816 int err; 1817 bool has_symbols; 1818 1819 err = fdt_path_offset(fdt, "/__symbols__"); 1820 has_symbols = err >= 0; 1821 1822 err = fdt_overlay_apply(fdt, fdto); 1823 if (err < 0) { 1824 printf("failed on fdt_overlay_apply(): %s\n", 1825 fdt_strerror(err)); 1826 if (!has_symbols) { 1827 printf("base fdt does did not have a /__symbols__ node\n"); 1828 printf("make sure you've compiled with -@\n"); 1829 } 1830 } 1831 return err; 1832 } 1833 #endif 1834