1 /* 2 * (C) Copyright 2007 3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com 4 * 5 * Copyright 2010-2011 Freescale Semiconductor, Inc. 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <inttypes.h> 12 #include <stdio_dev.h> 13 #include <linux/ctype.h> 14 #include <linux/types.h> 15 #include <asm/global_data.h> 16 #include <libfdt.h> 17 #include <fdt_support.h> 18 #include <exports.h> 19 #include <fdtdec.h> 20 21 /** 22 * fdt_getprop_u32_default_node - Return a node's property or a default 23 * 24 * @fdt: ptr to device tree 25 * @off: offset of node 26 * @cell: cell offset in property 27 * @prop: property name 28 * @dflt: default value if the property isn't found 29 * 30 * Convenience function to return a node's property or a default value if 31 * the property doesn't exist. 32 */ 33 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, 34 const char *prop, const u32 dflt) 35 { 36 const fdt32_t *val; 37 int len; 38 39 val = fdt_getprop(fdt, off, prop, &len); 40 41 /* Check if property exists */ 42 if (!val) 43 return dflt; 44 45 /* Check if property is long enough */ 46 if (len < ((cell + 1) * sizeof(uint32_t))) 47 return dflt; 48 49 return fdt32_to_cpu(*val); 50 } 51 52 /** 53 * fdt_getprop_u32_default - Find a node and return it's property or a default 54 * 55 * @fdt: ptr to device tree 56 * @path: path of node 57 * @prop: property name 58 * @dflt: default value if the property isn't found 59 * 60 * Convenience function to find a node and return it's property or a 61 * default value if it doesn't exist. 62 */ 63 u32 fdt_getprop_u32_default(const void *fdt, const char *path, 64 const char *prop, const u32 dflt) 65 { 66 int off; 67 68 off = fdt_path_offset(fdt, path); 69 if (off < 0) 70 return dflt; 71 72 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); 73 } 74 75 /** 76 * fdt_find_and_setprop: Find a node and set it's property 77 * 78 * @fdt: ptr to device tree 79 * @node: path of node 80 * @prop: property name 81 * @val: ptr to new value 82 * @len: length of new property value 83 * @create: flag to create the property if it doesn't exist 84 * 85 * Convenience function to directly set a property given the path to the node. 86 */ 87 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 88 const void *val, int len, int create) 89 { 90 int nodeoff = fdt_path_offset(fdt, node); 91 92 if (nodeoff < 0) 93 return nodeoff; 94 95 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) 96 return 0; /* create flag not set; so exit quietly */ 97 98 return fdt_setprop(fdt, nodeoff, prop, val, len); 99 } 100 101 /** 102 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node 103 * 104 * @fdt: pointer to the device tree blob 105 * @parentoffset: structure block offset of a node 106 * @name: name of the subnode to locate 107 * 108 * fdt_subnode_offset() finds a subnode of the node with a given name. 109 * If the subnode does not exist, it will be created. 110 */ 111 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) 112 { 113 int offset; 114 115 offset = fdt_subnode_offset(fdt, parentoffset, name); 116 117 if (offset == -FDT_ERR_NOTFOUND) 118 offset = fdt_add_subnode(fdt, parentoffset, name); 119 120 if (offset < 0) 121 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset)); 122 123 return offset; 124 } 125 126 /* rename to CONFIG_OF_STDOUT_PATH ? */ 127 #if defined(OF_STDOUT_PATH) 128 static int fdt_fixup_stdout(void *fdt, int chosenoff) 129 { 130 return fdt_setprop(fdt, chosenoff, "linux,stdout-path", 131 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); 132 } 133 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) 134 static int fdt_fixup_stdout(void *fdt, int chosenoff) 135 { 136 int err; 137 int aliasoff; 138 char sername[9] = { 0 }; 139 const void *path; 140 int len; 141 char tmp[256]; /* long enough */ 142 143 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 144 145 aliasoff = fdt_path_offset(fdt, "/aliases"); 146 if (aliasoff < 0) { 147 err = aliasoff; 148 goto noalias; 149 } 150 151 path = fdt_getprop(fdt, aliasoff, sername, &len); 152 if (!path) { 153 err = len; 154 goto noalias; 155 } 156 157 /* fdt_setprop may break "path" so we copy it to tmp buffer */ 158 memcpy(tmp, path, len); 159 160 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); 161 if (err < 0) 162 printf("WARNING: could not set linux,stdout-path %s.\n", 163 fdt_strerror(err)); 164 165 return err; 166 167 noalias: 168 printf("WARNING: %s: could not read %s alias: %s\n", 169 __func__, sername, fdt_strerror(err)); 170 171 return 0; 172 } 173 #else 174 static int fdt_fixup_stdout(void *fdt, int chosenoff) 175 { 176 return 0; 177 } 178 #endif 179 180 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, 181 uint64_t val, int is_u64) 182 { 183 if (is_u64) 184 return fdt_setprop_u64(fdt, nodeoffset, name, val); 185 else 186 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); 187 } 188 189 int fdt_root(void *fdt) 190 { 191 char *serial; 192 int err; 193 194 err = fdt_check_header(fdt); 195 if (err < 0) { 196 printf("fdt_root: %s\n", fdt_strerror(err)); 197 return err; 198 } 199 200 serial = env_get("serial#"); 201 if (serial) { 202 err = fdt_setprop(fdt, 0, "serial-number", serial, 203 strlen(serial) + 1); 204 205 if (err < 0) { 206 printf("WARNING: could not set serial-number %s.\n", 207 fdt_strerror(err)); 208 return err; 209 } 210 } 211 212 return 0; 213 } 214 215 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) 216 { 217 int nodeoffset; 218 int err, j, total; 219 int is_u64; 220 uint64_t addr, size; 221 222 /* just return if the size of initrd is zero */ 223 if (initrd_start == initrd_end) 224 return 0; 225 226 /* find or create "/chosen" node. */ 227 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 228 if (nodeoffset < 0) 229 return nodeoffset; 230 231 total = fdt_num_mem_rsv(fdt); 232 233 /* 234 * Look for an existing entry and update it. If we don't find 235 * the entry, we will j be the next available slot. 236 */ 237 for (j = 0; j < total; j++) { 238 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 239 if (addr == initrd_start) { 240 fdt_del_mem_rsv(fdt, j); 241 break; 242 } 243 } 244 245 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 246 if (err < 0) { 247 printf("fdt_initrd: %s\n", fdt_strerror(err)); 248 return err; 249 } 250 251 is_u64 = (fdt_address_cells(fdt, 0) == 2); 252 253 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", 254 (uint64_t)initrd_start, is_u64); 255 256 if (err < 0) { 257 printf("WARNING: could not set linux,initrd-start %s.\n", 258 fdt_strerror(err)); 259 return err; 260 } 261 262 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", 263 (uint64_t)initrd_end, is_u64); 264 265 if (err < 0) { 266 printf("WARNING: could not set linux,initrd-end %s.\n", 267 fdt_strerror(err)); 268 269 return err; 270 } 271 272 return 0; 273 } 274 275 int fdt_chosen(void *fdt) 276 { 277 int nodeoffset; 278 int err; 279 char *str; /* used to set string properties */ 280 281 err = fdt_check_header(fdt); 282 if (err < 0) { 283 printf("fdt_chosen: %s\n", fdt_strerror(err)); 284 return err; 285 } 286 287 /* find or create "/chosen" node. */ 288 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 289 if (nodeoffset < 0) 290 return nodeoffset; 291 292 str = env_get("bootargs"); 293 if (str) { 294 #ifdef CONFIG_ARCH_ROCKCHIP 295 const char *bootargs; 296 297 bootargs = fdt_getprop(fdt, nodeoffset, "bootargs", NULL); 298 if (bootargs) { 299 /* Append kernel bootargs */ 300 env_update("bootargs", bootargs); 301 /* 302 * Initrd fixup: remove unused "initrd=0x...,0x...", 303 * this for compatible with legacy parameter.txt 304 */ 305 env_delete("bootargs", "initrd="); 306 str = env_get("bootargs"); 307 } 308 #endif 309 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 310 strlen(str) + 1); 311 if (err < 0) { 312 printf("WARNING: could not set bootargs %s.\n", 313 fdt_strerror(err)); 314 return err; 315 } 316 } 317 318 debug("bootargs = %s\n", env_get("bootargs")); 319 320 return fdt_fixup_stdout(fdt, nodeoffset); 321 } 322 323 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 324 const void *val, int len, int create) 325 { 326 #if defined(DEBUG) 327 int i; 328 debug("Updating property '%s/%s' = ", path, prop); 329 for (i = 0; i < len; i++) 330 debug(" %.2x", *(u8*)(val+i)); 331 debug("\n"); 332 #endif 333 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 334 if (rc) 335 printf("Unable to update property %s:%s, err=%s\n", 336 path, prop, fdt_strerror(rc)); 337 } 338 339 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 340 u32 val, int create) 341 { 342 fdt32_t tmp = cpu_to_fdt32(val); 343 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 344 } 345 346 void do_fixup_by_prop(void *fdt, 347 const char *pname, const void *pval, int plen, 348 const char *prop, const void *val, int len, 349 int create) 350 { 351 int off; 352 #if defined(DEBUG) 353 int i; 354 debug("Updating property '%s' = ", prop); 355 for (i = 0; i < len; i++) 356 debug(" %.2x", *(u8*)(val+i)); 357 debug("\n"); 358 #endif 359 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 360 while (off != -FDT_ERR_NOTFOUND) { 361 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 362 fdt_setprop(fdt, off, prop, val, len); 363 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 364 } 365 } 366 367 void do_fixup_by_prop_u32(void *fdt, 368 const char *pname, const void *pval, int plen, 369 const char *prop, u32 val, int create) 370 { 371 fdt32_t tmp = cpu_to_fdt32(val); 372 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 373 } 374 375 void do_fixup_by_compat(void *fdt, const char *compat, 376 const char *prop, const void *val, int len, int create) 377 { 378 int off = -1; 379 #if defined(DEBUG) 380 int i; 381 debug("Updating property '%s' = ", prop); 382 for (i = 0; i < len; i++) 383 debug(" %.2x", *(u8*)(val+i)); 384 debug("\n"); 385 #endif 386 off = fdt_node_offset_by_compatible(fdt, -1, compat); 387 while (off != -FDT_ERR_NOTFOUND) { 388 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 389 fdt_setprop(fdt, off, prop, val, len); 390 off = fdt_node_offset_by_compatible(fdt, off, compat); 391 } 392 } 393 394 void do_fixup_by_compat_u32(void *fdt, const char *compat, 395 const char *prop, u32 val, int create) 396 { 397 fdt32_t tmp = cpu_to_fdt32(val); 398 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 399 } 400 401 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY 402 /* 403 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 404 */ 405 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 406 int n) 407 { 408 int i; 409 int address_cells = fdt_address_cells(fdt, 0); 410 int size_cells = fdt_size_cells(fdt, 0); 411 char *p = buf; 412 413 for (i = 0; i < n; i++) { 414 if (address_cells == 2) 415 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 416 else 417 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 418 p += 4 * address_cells; 419 420 if (size_cells == 2) 421 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 422 else 423 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 424 p += 4 * size_cells; 425 } 426 427 return p - (char *)buf; 428 } 429 430 int fdt_record_loadable(void *blob, u32 index, const char *name, 431 uintptr_t load_addr, u32 size, uintptr_t entry_point, 432 const char *type, const char *os) 433 { 434 int err, node; 435 436 err = fdt_check_header(blob); 437 if (err < 0) { 438 printf("%s: %s\n", __func__, fdt_strerror(err)); 439 return err; 440 } 441 442 /* find or create "/fit-images" node */ 443 node = fdt_find_or_add_subnode(blob, 0, "fit-images"); 444 if (node < 0) 445 return node; 446 447 /* find or create "/fit-images/<name>" node */ 448 node = fdt_find_or_add_subnode(blob, node, name); 449 if (node < 0) 450 return node; 451 452 /* 453 * We record these as 32bit entities, possibly truncating addresses. 454 * However, spl_fit.c is not 64bit safe either: i.e. we should not 455 * have an issue here. 456 */ 457 fdt_setprop_u32(blob, node, "load-addr", load_addr); 458 if (entry_point != -1) 459 fdt_setprop_u32(blob, node, "entry-point", entry_point); 460 fdt_setprop_u32(blob, node, "size", size); 461 if (type) 462 fdt_setprop_string(blob, node, "type", type); 463 if (os) 464 fdt_setprop_string(blob, node, "os", os); 465 466 return node; 467 } 468 469 #ifdef CONFIG_NR_DRAM_BANKS 470 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 471 #else 472 #define MEMORY_BANKS_MAX 4 473 #endif 474 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 475 { 476 int err, nodeoffset; 477 int len; 478 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 479 480 if (banks > MEMORY_BANKS_MAX) { 481 printf("%s: num banks %d exceeds hardcoded limit %d." 482 " Recompile with higher MEMORY_BANKS_MAX?\n", 483 __FUNCTION__, banks, MEMORY_BANKS_MAX); 484 return -1; 485 } 486 487 err = fdt_check_header(blob); 488 if (err < 0) { 489 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 490 return err; 491 } 492 493 /* find or create "/memory" node. */ 494 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 495 if (nodeoffset < 0) 496 return nodeoffset; 497 498 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 499 sizeof("memory")); 500 if (err < 0) { 501 printf("WARNING: could not set %s %s.\n", "device_type", 502 fdt_strerror(err)); 503 return err; 504 } 505 506 if (!banks) 507 return 0; 508 509 len = fdt_pack_reg(blob, tmp, start, size, banks); 510 511 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 512 if (err < 0) { 513 printf("WARNING: could not set %s %s.\n", 514 "reg", fdt_strerror(err)); 515 return err; 516 } 517 return 0; 518 } 519 #endif 520 521 int fdt_fixup_memory(void *blob, u64 start, u64 size) 522 { 523 return fdt_fixup_memory_banks(blob, &start, &size, 1); 524 } 525 526 int fdt_update_reserved_memory(void *blob, char *name, u64 start, u64 size) 527 { 528 int nodeoffset, len, err; 529 u8 tmp[16]; /* Up to 64-bit address + 64-bit size */ 530 531 #if 0 532 /*name is rockchip_logo*/ 533 nodeoffset = fdt_find_or_add_subnode(blob, 0, "reserved-memory"); 534 if (nodeoffset < 0) 535 return nodeoffset; 536 printf("hjc>>reserved-memory>>%s, nodeoffset:%d\n", __func__, nodeoffset); 537 nodeoffset = fdt_find_or_add_subnode(blob, nodeoffset, name); 538 if (nodeoffset < 0) 539 return nodeoffset; 540 #else 541 nodeoffset = fdt_node_offset_by_compatible(blob, 0, name); 542 if (nodeoffset < 0) 543 debug("Can't find nodeoffset: %d\n", nodeoffset); 544 #endif 545 len = fdt_pack_reg(blob, tmp, &start, &size, 1); 546 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 547 if (err < 0) { 548 printf("WARNING: could not set %s %s.\n", 549 "reg", fdt_strerror(err)); 550 return err; 551 } 552 553 return nodeoffset; 554 } 555 556 void fdt_fixup_ethernet(void *fdt) 557 { 558 int i = 0, j, prop; 559 char *tmp, *end; 560 char mac[16]; 561 const char *path; 562 unsigned char mac_addr[ARP_HLEN]; 563 int offset; 564 #ifdef FDT_SEQ_MACADDR_FROM_ENV 565 int nodeoff; 566 const struct fdt_property *fdt_prop; 567 #endif 568 569 if (fdt_path_offset(fdt, "/aliases") < 0) 570 return; 571 572 /* Cycle through all aliases */ 573 for (prop = 0; ; prop++) { 574 const char *name; 575 576 /* FDT might have been edited, recompute the offset */ 577 offset = fdt_first_property_offset(fdt, 578 fdt_path_offset(fdt, "/aliases")); 579 /* Select property number 'prop' */ 580 for (j = 0; j < prop; j++) 581 offset = fdt_next_property_offset(fdt, offset); 582 583 if (offset < 0) 584 break; 585 586 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 587 if (!strncmp(name, "ethernet", 8)) { 588 /* Treat plain "ethernet" same as "ethernet0". */ 589 if (!strcmp(name, "ethernet") 590 #ifdef FDT_SEQ_MACADDR_FROM_ENV 591 || !strcmp(name, "ethernet0") 592 #endif 593 ) 594 i = 0; 595 #ifndef FDT_SEQ_MACADDR_FROM_ENV 596 else 597 i = trailing_strtol(name); 598 #endif 599 if (i != -1) { 600 if (i == 0) 601 strcpy(mac, "ethaddr"); 602 else 603 sprintf(mac, "eth%daddr", i); 604 } else { 605 continue; 606 } 607 #ifdef FDT_SEQ_MACADDR_FROM_ENV 608 nodeoff = fdt_path_offset(fdt, path); 609 fdt_prop = fdt_get_property(fdt, nodeoff, "status", 610 NULL); 611 if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) 612 continue; 613 i++; 614 #endif 615 tmp = env_get(mac); 616 if (!tmp) 617 continue; 618 619 for (j = 0; j < 6; j++) { 620 mac_addr[j] = tmp ? 621 simple_strtoul(tmp, &end, 16) : 0; 622 if (tmp) 623 tmp = (*end) ? end + 1 : end; 624 } 625 626 do_fixup_by_path(fdt, path, "mac-address", 627 &mac_addr, 6, 0); 628 do_fixup_by_path(fdt, path, "local-mac-address", 629 &mac_addr, 6, 1); 630 } 631 } 632 } 633 634 /* Resize the fdt to its actual size + a bit of padding */ 635 int fdt_shrink_to_minimum(void *blob, uint extrasize) 636 { 637 int i; 638 uint64_t addr, size; 639 int total, ret; 640 uint actualsize; 641 642 if (!blob) 643 return 0; 644 645 total = fdt_num_mem_rsv(blob); 646 for (i = 0; i < total; i++) { 647 fdt_get_mem_rsv(blob, i, &addr, &size); 648 if (addr == (uintptr_t)blob) { 649 fdt_del_mem_rsv(blob, i); 650 break; 651 } 652 } 653 654 /* 655 * Calculate the actual size of the fdt 656 * plus the size needed for 5 fdt_add_mem_rsv, one 657 * for the fdt itself and 4 for a possible initrd 658 * ((initrd-start + initrd-end) * 2 (name & value)) 659 */ 660 actualsize = fdt_off_dt_strings(blob) + 661 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 662 663 actualsize += extrasize; 664 /* Make it so the fdt ends on a page boundary */ 665 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 666 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 667 668 /* Change the fdt header to reflect the correct size */ 669 fdt_set_totalsize(blob, actualsize); 670 671 /* Add the new reservation */ 672 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 673 if (ret < 0) 674 return ret; 675 676 return actualsize; 677 } 678 679 #ifdef CONFIG_PCI 680 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 681 682 #define FDT_PCI_PREFETCH (0x40000000) 683 #define FDT_PCI_MEM32 (0x02000000) 684 #define FDT_PCI_IO (0x01000000) 685 #define FDT_PCI_MEM64 (0x03000000) 686 687 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 688 689 int addrcell, sizecell, len, r; 690 u32 *dma_range; 691 /* sized based on pci addr cells, size-cells, & address-cells */ 692 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 693 694 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 695 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 696 697 dma_range = &dma_ranges[0]; 698 for (r = 0; r < hose->region_count; r++) { 699 u64 bus_start, phys_start, size; 700 701 /* skip if !PCI_REGION_SYS_MEMORY */ 702 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 703 continue; 704 705 bus_start = (u64)hose->regions[r].bus_start; 706 phys_start = (u64)hose->regions[r].phys_start; 707 size = (u64)hose->regions[r].size; 708 709 dma_range[0] = 0; 710 if (size >= 0x100000000ull) 711 dma_range[0] |= FDT_PCI_MEM64; 712 else 713 dma_range[0] |= FDT_PCI_MEM32; 714 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 715 dma_range[0] |= FDT_PCI_PREFETCH; 716 #ifdef CONFIG_SYS_PCI_64BIT 717 dma_range[1] = bus_start >> 32; 718 #else 719 dma_range[1] = 0; 720 #endif 721 dma_range[2] = bus_start & 0xffffffff; 722 723 if (addrcell == 2) { 724 dma_range[3] = phys_start >> 32; 725 dma_range[4] = phys_start & 0xffffffff; 726 } else { 727 dma_range[3] = phys_start & 0xffffffff; 728 } 729 730 if (sizecell == 2) { 731 dma_range[3 + addrcell + 0] = size >> 32; 732 dma_range[3 + addrcell + 1] = size & 0xffffffff; 733 } else { 734 dma_range[3 + addrcell + 0] = size & 0xffffffff; 735 } 736 737 dma_range += (3 + addrcell + sizecell); 738 } 739 740 len = dma_range - &dma_ranges[0]; 741 if (len) 742 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 743 744 return 0; 745 } 746 #endif 747 748 int fdt_increase_size(void *fdt, int add_len) 749 { 750 int newlen; 751 752 newlen = fdt_totalsize(fdt) + add_len; 753 754 /* Open in place with a new len */ 755 return fdt_open_into(fdt, fdt, newlen); 756 } 757 758 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 759 #include <jffs2/load_kernel.h> 760 #include <mtd_node.h> 761 762 struct reg_cell { 763 unsigned int r0; 764 unsigned int r1; 765 }; 766 767 int fdt_del_subnodes(const void *blob, int parent_offset) 768 { 769 int off, ndepth; 770 int ret; 771 772 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 773 (off >= 0) && (ndepth > 0); 774 off = fdt_next_node(blob, off, &ndepth)) { 775 if (ndepth == 1) { 776 debug("delete %s: offset: %x\n", 777 fdt_get_name(blob, off, 0), off); 778 ret = fdt_del_node((void *)blob, off); 779 if (ret < 0) { 780 printf("Can't delete node: %s\n", 781 fdt_strerror(ret)); 782 return ret; 783 } else { 784 ndepth = 0; 785 off = parent_offset; 786 } 787 } 788 } 789 return 0; 790 } 791 792 int fdt_del_partitions(void *blob, int parent_offset) 793 { 794 const void *prop; 795 int ndepth = 0; 796 int off; 797 int ret; 798 799 off = fdt_next_node(blob, parent_offset, &ndepth); 800 if (off > 0 && ndepth == 1) { 801 prop = fdt_getprop(blob, off, "label", NULL); 802 if (prop == NULL) { 803 /* 804 * Could not find label property, nand {}; node? 805 * Check subnode, delete partitions there if any. 806 */ 807 return fdt_del_partitions(blob, off); 808 } else { 809 ret = fdt_del_subnodes(blob, parent_offset); 810 if (ret < 0) { 811 printf("Can't remove subnodes: %s\n", 812 fdt_strerror(ret)); 813 return ret; 814 } 815 } 816 } 817 return 0; 818 } 819 820 int fdt_node_set_part_info(void *blob, int parent_offset, 821 struct mtd_device *dev) 822 { 823 struct list_head *pentry; 824 struct part_info *part; 825 struct reg_cell cell; 826 int off, ndepth = 0; 827 int part_num, ret; 828 char buf[64]; 829 830 ret = fdt_del_partitions(blob, parent_offset); 831 if (ret < 0) 832 return ret; 833 834 /* 835 * Check if it is nand {}; subnode, adjust 836 * the offset in this case 837 */ 838 off = fdt_next_node(blob, parent_offset, &ndepth); 839 if (off > 0 && ndepth == 1) 840 parent_offset = off; 841 842 part_num = 0; 843 list_for_each_prev(pentry, &dev->parts) { 844 int newoff; 845 846 part = list_entry(pentry, struct part_info, link); 847 848 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 849 part_num, part->name, part->size, 850 part->offset, part->mask_flags); 851 852 sprintf(buf, "partition@%llx", part->offset); 853 add_sub: 854 ret = fdt_add_subnode(blob, parent_offset, buf); 855 if (ret == -FDT_ERR_NOSPACE) { 856 ret = fdt_increase_size(blob, 512); 857 if (!ret) 858 goto add_sub; 859 else 860 goto err_size; 861 } else if (ret < 0) { 862 printf("Can't add partition node: %s\n", 863 fdt_strerror(ret)); 864 return ret; 865 } 866 newoff = ret; 867 868 /* Check MTD_WRITEABLE_CMD flag */ 869 if (part->mask_flags & 1) { 870 add_ro: 871 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 872 if (ret == -FDT_ERR_NOSPACE) { 873 ret = fdt_increase_size(blob, 512); 874 if (!ret) 875 goto add_ro; 876 else 877 goto err_size; 878 } else if (ret < 0) 879 goto err_prop; 880 } 881 882 cell.r0 = cpu_to_fdt32(part->offset); 883 cell.r1 = cpu_to_fdt32(part->size); 884 add_reg: 885 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 886 if (ret == -FDT_ERR_NOSPACE) { 887 ret = fdt_increase_size(blob, 512); 888 if (!ret) 889 goto add_reg; 890 else 891 goto err_size; 892 } else if (ret < 0) 893 goto err_prop; 894 895 add_label: 896 ret = fdt_setprop_string(blob, newoff, "label", part->name); 897 if (ret == -FDT_ERR_NOSPACE) { 898 ret = fdt_increase_size(blob, 512); 899 if (!ret) 900 goto add_label; 901 else 902 goto err_size; 903 } else if (ret < 0) 904 goto err_prop; 905 906 part_num++; 907 } 908 return 0; 909 err_size: 910 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 911 return ret; 912 err_prop: 913 printf("Can't add property: %s\n", fdt_strerror(ret)); 914 return ret; 915 } 916 917 /* 918 * Update partitions in nor/nand nodes using info from 919 * mtdparts environment variable. The nodes to update are 920 * specified by node_info structure which contains mtd device 921 * type and compatible string: E. g. the board code in 922 * ft_board_setup() could use: 923 * 924 * struct node_info nodes[] = { 925 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 926 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 927 * }; 928 * 929 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 930 */ 931 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 932 { 933 struct node_info *ni = node_info; 934 struct mtd_device *dev; 935 int i, idx; 936 int noff; 937 938 if (mtdparts_init() != 0) 939 return; 940 941 for (i = 0; i < node_info_size; i++) { 942 idx = 0; 943 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 944 while (noff != -FDT_ERR_NOTFOUND) { 945 debug("%s: %s, mtd dev type %d\n", 946 fdt_get_name(blob, noff, 0), 947 ni[i].compat, ni[i].type); 948 dev = device_find(ni[i].type, idx++); 949 if (dev) { 950 if (fdt_node_set_part_info(blob, noff, dev)) 951 return; /* return on error */ 952 } 953 954 /* Jump to next flash node */ 955 noff = fdt_node_offset_by_compatible(blob, noff, 956 ni[i].compat); 957 } 958 } 959 } 960 #endif 961 962 void fdt_del_node_and_alias(void *blob, const char *alias) 963 { 964 int off = fdt_path_offset(blob, alias); 965 966 if (off < 0) 967 return; 968 969 fdt_del_node(blob, off); 970 971 off = fdt_path_offset(blob, "/aliases"); 972 fdt_delprop(blob, off, alias); 973 } 974 975 /* Max address size we deal with */ 976 #define OF_MAX_ADDR_CELLS 4 977 #define OF_BAD_ADDR FDT_ADDR_T_NONE 978 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 979 (ns) > 0) 980 981 /* Debug utility */ 982 #ifdef DEBUG 983 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 984 { 985 printf("%s", s); 986 while(na--) 987 printf(" %08x", *(addr++)); 988 printf("\n"); 989 } 990 #else 991 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 992 #endif 993 994 /** 995 * struct of_bus - Callbacks for bus specific translators 996 * @name: A string used to identify this bus in debug output. 997 * @addresses: The name of the DT property from which addresses are 998 * to be read, typically "reg". 999 * @match: Return non-zero if the node whose parent is at 1000 * parentoffset in the FDT blob corresponds to a bus 1001 * of this type, otherwise return zero. If NULL a match 1002 * is assumed. 1003 * @count_cells:Count how many cells (be32 values) a node whose parent 1004 * is at parentoffset in the FDT blob will require to 1005 * represent its address (written to *addrc) & size 1006 * (written to *sizec). 1007 * @map: Map the address addr from the address space of this 1008 * bus to that of its parent, making use of the ranges 1009 * read from DT to an array at range. na and ns are the 1010 * number of cells (be32 values) used to hold and address 1011 * or size, respectively, for this bus. pna is the number 1012 * of cells used to hold an address for the parent bus. 1013 * Returns the address in the address space of the parent 1014 * bus. 1015 * @translate: Update the value of the address cells at addr within an 1016 * FDT by adding offset to it. na specifies the number of 1017 * cells used to hold the address being translated. Returns 1018 * zero on success, non-zero on error. 1019 * 1020 * Each bus type will include a struct of_bus in the of_busses array, 1021 * providing implementations of some or all of the functions used to 1022 * match the bus & handle address translation for its children. 1023 */ 1024 struct of_bus { 1025 const char *name; 1026 const char *addresses; 1027 int (*match)(const void *blob, int parentoffset); 1028 void (*count_cells)(const void *blob, int parentoffset, 1029 int *addrc, int *sizec); 1030 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 1031 int na, int ns, int pna); 1032 int (*translate)(fdt32_t *addr, u64 offset, int na); 1033 }; 1034 1035 /* Default translator (generic bus) */ 1036 void fdt_support_default_count_cells(const void *blob, int parentoffset, 1037 int *addrc, int *sizec) 1038 { 1039 const fdt32_t *prop; 1040 1041 if (addrc) 1042 *addrc = fdt_address_cells(blob, parentoffset); 1043 1044 if (sizec) { 1045 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 1046 if (prop) 1047 *sizec = be32_to_cpup(prop); 1048 else 1049 *sizec = 1; 1050 } 1051 } 1052 1053 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1054 int na, int ns, int pna) 1055 { 1056 u64 cp, s, da; 1057 1058 cp = fdt_read_number(range, na); 1059 s = fdt_read_number(range + na + pna, ns); 1060 da = fdt_read_number(addr, na); 1061 1062 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 1063 ", da=%" PRIu64 "\n", cp, s, da); 1064 1065 if (da < cp || da >= (cp + s)) 1066 return OF_BAD_ADDR; 1067 return da - cp; 1068 } 1069 1070 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1071 { 1072 u64 a = fdt_read_number(addr, na); 1073 memset(addr, 0, na * 4); 1074 a += offset; 1075 if (na > 1) 1076 addr[na - 2] = cpu_to_fdt32(a >> 32); 1077 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1078 1079 return 0; 1080 } 1081 1082 #ifdef CONFIG_OF_ISA_BUS 1083 1084 /* ISA bus translator */ 1085 static int of_bus_isa_match(const void *blob, int parentoffset) 1086 { 1087 const char *name; 1088 1089 name = fdt_get_name(blob, parentoffset, NULL); 1090 if (!name) 1091 return 0; 1092 1093 return !strcmp(name, "isa"); 1094 } 1095 1096 static void of_bus_isa_count_cells(const void *blob, int parentoffset, 1097 int *addrc, int *sizec) 1098 { 1099 if (addrc) 1100 *addrc = 2; 1101 if (sizec) 1102 *sizec = 1; 1103 } 1104 1105 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range, 1106 int na, int ns, int pna) 1107 { 1108 u64 cp, s, da; 1109 1110 /* Check address type match */ 1111 if ((addr[0] ^ range[0]) & cpu_to_be32(1)) 1112 return OF_BAD_ADDR; 1113 1114 cp = fdt_read_number(range + 1, na - 1); 1115 s = fdt_read_number(range + na + pna, ns); 1116 da = fdt_read_number(addr + 1, na - 1); 1117 1118 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64 1119 ", da=%" PRIu64 "\n", cp, s, da); 1120 1121 if (da < cp || da >= (cp + s)) 1122 return OF_BAD_ADDR; 1123 return da - cp; 1124 } 1125 1126 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na) 1127 { 1128 return of_bus_default_translate(addr + 1, offset, na - 1); 1129 } 1130 1131 #endif /* CONFIG_OF_ISA_BUS */ 1132 1133 /* Array of bus specific translators */ 1134 static struct of_bus of_busses[] = { 1135 #ifdef CONFIG_OF_ISA_BUS 1136 /* ISA */ 1137 { 1138 .name = "isa", 1139 .addresses = "reg", 1140 .match = of_bus_isa_match, 1141 .count_cells = of_bus_isa_count_cells, 1142 .map = of_bus_isa_map, 1143 .translate = of_bus_isa_translate, 1144 }, 1145 #endif /* CONFIG_OF_ISA_BUS */ 1146 /* Default */ 1147 { 1148 .name = "default", 1149 .addresses = "reg", 1150 .count_cells = fdt_support_default_count_cells, 1151 .map = of_bus_default_map, 1152 .translate = of_bus_default_translate, 1153 }, 1154 }; 1155 1156 static struct of_bus *of_match_bus(const void *blob, int parentoffset) 1157 { 1158 struct of_bus *bus; 1159 1160 if (ARRAY_SIZE(of_busses) == 1) 1161 return of_busses; 1162 1163 for (bus = of_busses; bus; bus++) { 1164 if (!bus->match || bus->match(blob, parentoffset)) 1165 return bus; 1166 } 1167 1168 /* 1169 * We should always have matched the default bus at least, since 1170 * it has a NULL match field. If we didn't then it somehow isn't 1171 * in the of_busses array or something equally catastrophic has 1172 * gone wrong. 1173 */ 1174 assert(0); 1175 return NULL; 1176 } 1177 1178 static int of_translate_one(const void *blob, int parent, struct of_bus *bus, 1179 struct of_bus *pbus, fdt32_t *addr, 1180 int na, int ns, int pna, const char *rprop) 1181 { 1182 const fdt32_t *ranges; 1183 int rlen; 1184 int rone; 1185 u64 offset = OF_BAD_ADDR; 1186 1187 /* Normally, an absence of a "ranges" property means we are 1188 * crossing a non-translatable boundary, and thus the addresses 1189 * below the current not cannot be converted to CPU physical ones. 1190 * Unfortunately, while this is very clear in the spec, it's not 1191 * what Apple understood, and they do have things like /uni-n or 1192 * /ht nodes with no "ranges" property and a lot of perfectly 1193 * useable mapped devices below them. Thus we treat the absence of 1194 * "ranges" as equivalent to an empty "ranges" property which means 1195 * a 1:1 translation at that level. It's up to the caller not to try 1196 * to translate addresses that aren't supposed to be translated in 1197 * the first place. --BenH. 1198 */ 1199 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1200 if (ranges == NULL || rlen == 0) { 1201 offset = fdt_read_number(addr, na); 1202 memset(addr, 0, pna * 4); 1203 debug("OF: no ranges, 1:1 translation\n"); 1204 goto finish; 1205 } 1206 1207 debug("OF: walking ranges...\n"); 1208 1209 /* Now walk through the ranges */ 1210 rlen /= 4; 1211 rone = na + pna + ns; 1212 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1213 offset = bus->map(addr, ranges, na, ns, pna); 1214 if (offset != OF_BAD_ADDR) 1215 break; 1216 } 1217 if (offset == OF_BAD_ADDR) { 1218 debug("OF: not found !\n"); 1219 return 1; 1220 } 1221 memcpy(addr, ranges + na, 4 * pna); 1222 1223 finish: 1224 of_dump_addr("OF: parent translation for:", addr, pna); 1225 debug("OF: with offset: %" PRIu64 "\n", offset); 1226 1227 /* Translate it into parent bus space */ 1228 return pbus->translate(addr, offset, pna); 1229 } 1230 1231 /* 1232 * Translate an address from the device-tree into a CPU physical address, 1233 * this walks up the tree and applies the various bus mappings on the 1234 * way. 1235 * 1236 * Note: We consider that crossing any level with #size-cells == 0 to mean 1237 * that translation is impossible (that is we are not dealing with a value 1238 * that can be mapped to a cpu physical address). This is not really specified 1239 * that way, but this is traditionally the way IBM at least do things 1240 */ 1241 static u64 __of_translate_address(const void *blob, int node_offset, 1242 const fdt32_t *in_addr, const char *rprop) 1243 { 1244 int parent; 1245 struct of_bus *bus, *pbus; 1246 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1247 int na, ns, pna, pns; 1248 u64 result = OF_BAD_ADDR; 1249 1250 debug("OF: ** translation for device %s **\n", 1251 fdt_get_name(blob, node_offset, NULL)); 1252 1253 /* Get parent & match bus type */ 1254 parent = fdt_parent_offset(blob, node_offset); 1255 if (parent < 0) 1256 goto bail; 1257 bus = of_match_bus(blob, parent); 1258 1259 /* Cound address cells & copy address locally */ 1260 bus->count_cells(blob, parent, &na, &ns); 1261 if (!OF_CHECK_COUNTS(na, ns)) { 1262 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1263 fdt_get_name(blob, node_offset, NULL)); 1264 goto bail; 1265 } 1266 memcpy(addr, in_addr, na * 4); 1267 1268 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1269 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1270 of_dump_addr("OF: translating address:", addr, na); 1271 1272 /* Translate */ 1273 for (;;) { 1274 /* Switch to parent bus */ 1275 node_offset = parent; 1276 parent = fdt_parent_offset(blob, node_offset); 1277 1278 /* If root, we have finished */ 1279 if (parent < 0) { 1280 debug("OF: reached root node\n"); 1281 result = fdt_read_number(addr, na); 1282 break; 1283 } 1284 1285 /* Get new parent bus and counts */ 1286 pbus = of_match_bus(blob, parent); 1287 pbus->count_cells(blob, parent, &pna, &pns); 1288 if (!OF_CHECK_COUNTS(pna, pns)) { 1289 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1290 fdt_get_name(blob, node_offset, NULL)); 1291 break; 1292 } 1293 1294 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1295 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1296 1297 /* Apply bus translation */ 1298 if (of_translate_one(blob, node_offset, bus, pbus, 1299 addr, na, ns, pna, rprop)) 1300 break; 1301 1302 /* Complete the move up one level */ 1303 na = pna; 1304 ns = pns; 1305 bus = pbus; 1306 1307 of_dump_addr("OF: one level translation:", addr, na); 1308 } 1309 bail: 1310 1311 return result; 1312 } 1313 1314 u64 fdt_translate_address(const void *blob, int node_offset, 1315 const fdt32_t *in_addr) 1316 { 1317 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1318 } 1319 1320 /** 1321 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1322 * who's reg property matches a physical cpu address 1323 * 1324 * @blob: ptr to device tree 1325 * @compat: compatiable string to match 1326 * @compat_off: property name 1327 * 1328 */ 1329 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1330 phys_addr_t compat_off) 1331 { 1332 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1333 while (off != -FDT_ERR_NOTFOUND) { 1334 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1335 if (reg) { 1336 if (compat_off == fdt_translate_address(blob, off, reg)) 1337 return off; 1338 } 1339 off = fdt_node_offset_by_compatible(blob, off, compat); 1340 } 1341 1342 return -FDT_ERR_NOTFOUND; 1343 } 1344 1345 /** 1346 * fdt_alloc_phandle: Return next free phandle value 1347 * 1348 * @blob: ptr to device tree 1349 */ 1350 int fdt_alloc_phandle(void *blob) 1351 { 1352 int offset; 1353 uint32_t phandle = 0; 1354 1355 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1356 offset = fdt_next_node(blob, offset, NULL)) { 1357 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1358 } 1359 1360 return phandle + 1; 1361 } 1362 1363 /* 1364 * fdt_set_phandle: Create a phandle property for the given node 1365 * 1366 * @fdt: ptr to device tree 1367 * @nodeoffset: node to update 1368 * @phandle: phandle value to set (must be unique) 1369 */ 1370 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1371 { 1372 int ret; 1373 1374 #ifdef DEBUG 1375 int off = fdt_node_offset_by_phandle(fdt, phandle); 1376 1377 if ((off >= 0) && (off != nodeoffset)) { 1378 char buf[64]; 1379 1380 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1381 printf("Trying to update node %s with phandle %u ", 1382 buf, phandle); 1383 1384 fdt_get_path(fdt, off, buf, sizeof(buf)); 1385 printf("that already exists in node %s.\n", buf); 1386 return -FDT_ERR_BADPHANDLE; 1387 } 1388 #endif 1389 1390 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1391 if (ret < 0) 1392 return ret; 1393 1394 /* 1395 * For now, also set the deprecated "linux,phandle" property, so that we 1396 * don't break older kernels. 1397 */ 1398 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1399 1400 return ret; 1401 } 1402 1403 /* 1404 * fdt_create_phandle: Create a phandle property for the given node 1405 * 1406 * @fdt: ptr to device tree 1407 * @nodeoffset: node to update 1408 */ 1409 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1410 { 1411 /* see if there is a phandle already */ 1412 int phandle = fdt_get_phandle(fdt, nodeoffset); 1413 1414 /* if we got 0, means no phandle so create one */ 1415 if (phandle == 0) { 1416 int ret; 1417 1418 phandle = fdt_alloc_phandle(fdt); 1419 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1420 if (ret < 0) { 1421 printf("Can't set phandle %u: %s\n", phandle, 1422 fdt_strerror(ret)); 1423 return 0; 1424 } 1425 } 1426 1427 return phandle; 1428 } 1429 1430 /* 1431 * fdt_set_node_status: Set status for the given node 1432 * 1433 * @fdt: ptr to device tree 1434 * @nodeoffset: node to update 1435 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1436 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1437 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1438 */ 1439 int fdt_set_node_status(void *fdt, int nodeoffset, 1440 enum fdt_status status, unsigned int error_code) 1441 { 1442 char buf[16]; 1443 int ret = 0; 1444 1445 if (nodeoffset < 0) 1446 return nodeoffset; 1447 1448 switch (status) { 1449 case FDT_STATUS_OKAY: 1450 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1451 break; 1452 case FDT_STATUS_DISABLED: 1453 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1454 break; 1455 case FDT_STATUS_FAIL: 1456 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1457 break; 1458 case FDT_STATUS_FAIL_ERROR_CODE: 1459 sprintf(buf, "fail-%d", error_code); 1460 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1461 break; 1462 default: 1463 printf("Invalid fdt status: %x\n", status); 1464 ret = -1; 1465 break; 1466 } 1467 1468 return ret; 1469 } 1470 1471 /* 1472 * fdt_set_status_by_alias: Set status for the given node given an alias 1473 * 1474 * @fdt: ptr to device tree 1475 * @alias: alias of node to update 1476 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1477 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1478 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1479 */ 1480 int fdt_set_status_by_alias(void *fdt, const char* alias, 1481 enum fdt_status status, unsigned int error_code) 1482 { 1483 int offset = fdt_path_offset(fdt, alias); 1484 1485 return fdt_set_node_status(fdt, offset, status, error_code); 1486 } 1487 1488 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1489 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1490 { 1491 int noff; 1492 int ret; 1493 1494 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1495 if (noff != -FDT_ERR_NOTFOUND) { 1496 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1497 add_edid: 1498 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1499 if (ret == -FDT_ERR_NOSPACE) { 1500 ret = fdt_increase_size(blob, 512); 1501 if (!ret) 1502 goto add_edid; 1503 else 1504 goto err_size; 1505 } else if (ret < 0) { 1506 printf("Can't add property: %s\n", fdt_strerror(ret)); 1507 return ret; 1508 } 1509 } 1510 return 0; 1511 err_size: 1512 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1513 return ret; 1514 } 1515 #endif 1516 1517 /* 1518 * Verify the physical address of device tree node for a given alias 1519 * 1520 * This function locates the device tree node of a given alias, and then 1521 * verifies that the physical address of that device matches the given 1522 * parameter. It displays a message if there is a mismatch. 1523 * 1524 * Returns 1 on success, 0 on failure 1525 */ 1526 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1527 { 1528 const char *path; 1529 const fdt32_t *reg; 1530 int node, len; 1531 u64 dt_addr; 1532 1533 path = fdt_getprop(fdt, anode, alias, NULL); 1534 if (!path) { 1535 /* If there's no such alias, then it's not a failure */ 1536 return 1; 1537 } 1538 1539 node = fdt_path_offset(fdt, path); 1540 if (node < 0) { 1541 printf("Warning: device tree alias '%s' points to invalid " 1542 "node %s.\n", alias, path); 1543 return 0; 1544 } 1545 1546 reg = fdt_getprop(fdt, node, "reg", &len); 1547 if (!reg) { 1548 printf("Warning: device tree node '%s' has no address.\n", 1549 path); 1550 return 0; 1551 } 1552 1553 dt_addr = fdt_translate_address(fdt, node, reg); 1554 if (addr != dt_addr) { 1555 printf("Warning: U-Boot configured device %s at address %" 1556 PRIx64 ",\n but the device tree has it address %" 1557 PRIx64 ".\n", alias, addr, dt_addr); 1558 return 0; 1559 } 1560 1561 return 1; 1562 } 1563 1564 /* 1565 * Returns the base address of an SOC or PCI node 1566 */ 1567 u64 fdt_get_base_address(const void *fdt, int node) 1568 { 1569 int size; 1570 const fdt32_t *prop; 1571 1572 prop = fdt_getprop(fdt, node, "reg", &size); 1573 1574 return prop ? fdt_translate_address(fdt, node, prop) : 0; 1575 } 1576 1577 /* 1578 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1579 */ 1580 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1581 uint64_t *val, int cells) 1582 { 1583 const fdt32_t *prop32 = &prop[cell_off]; 1584 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1585 1586 if ((cell_off + cells) > prop_len) 1587 return -FDT_ERR_NOSPACE; 1588 1589 switch (cells) { 1590 case 1: 1591 *val = fdt32_to_cpu(*prop32); 1592 break; 1593 case 2: 1594 *val = fdt64_to_cpu(*prop64); 1595 break; 1596 default: 1597 return -FDT_ERR_NOSPACE; 1598 } 1599 1600 return 0; 1601 } 1602 1603 /** 1604 * fdt_read_range - Read a node's n'th range property 1605 * 1606 * @fdt: ptr to device tree 1607 * @node: offset of node 1608 * @n: range index 1609 * @child_addr: pointer to storage for the "child address" field 1610 * @addr: pointer to storage for the CPU view translated physical start 1611 * @len: pointer to storage for the range length 1612 * 1613 * Convenience function that reads and interprets a specific range out of 1614 * a number of the "ranges" property array. 1615 */ 1616 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1617 uint64_t *addr, uint64_t *len) 1618 { 1619 int pnode = fdt_parent_offset(fdt, node); 1620 const fdt32_t *ranges; 1621 int pacells; 1622 int acells; 1623 int scells; 1624 int ranges_len; 1625 int cell = 0; 1626 int r = 0; 1627 1628 /* 1629 * The "ranges" property is an array of 1630 * { <child address> <parent address> <size in child address space> } 1631 * 1632 * All 3 elements can span a diffent number of cells. Fetch their size. 1633 */ 1634 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1635 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1636 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1637 1638 /* Now try to get the ranges property */ 1639 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1640 if (!ranges) 1641 return -FDT_ERR_NOTFOUND; 1642 ranges_len /= sizeof(uint32_t); 1643 1644 /* Jump to the n'th entry */ 1645 cell = n * (pacells + acells + scells); 1646 1647 /* Read <child address> */ 1648 if (child_addr) { 1649 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1650 acells); 1651 if (r) 1652 return r; 1653 } 1654 cell += acells; 1655 1656 /* Read <parent address> */ 1657 if (addr) 1658 *addr = fdt_translate_address(fdt, node, ranges + cell); 1659 cell += pacells; 1660 1661 /* Read <size in child address space> */ 1662 if (len) { 1663 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1664 if (r) 1665 return r; 1666 } 1667 1668 return 0; 1669 } 1670 1671 /** 1672 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1673 * 1674 * @fdt: ptr to device tree 1675 * @node: offset of the simplefb node 1676 * @base_address: framebuffer base address 1677 * @width: width in pixels 1678 * @height: height in pixels 1679 * @stride: bytes per line 1680 * @format: pixel format string 1681 * 1682 * Convenience function to fill and enable a simplefb node. 1683 */ 1684 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1685 u32 height, u32 stride, const char *format) 1686 { 1687 char name[32]; 1688 fdt32_t cells[4]; 1689 int i, addrc, sizec, ret; 1690 1691 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1692 &addrc, &sizec); 1693 i = 0; 1694 if (addrc == 2) 1695 cells[i++] = cpu_to_fdt32(base_address >> 32); 1696 cells[i++] = cpu_to_fdt32(base_address); 1697 if (sizec == 2) 1698 cells[i++] = 0; 1699 cells[i++] = cpu_to_fdt32(height * stride); 1700 1701 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1702 if (ret < 0) 1703 return ret; 1704 1705 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1706 ret = fdt_set_name(fdt, node, name); 1707 if (ret < 0) 1708 return ret; 1709 1710 ret = fdt_setprop_u32(fdt, node, "width", width); 1711 if (ret < 0) 1712 return ret; 1713 1714 ret = fdt_setprop_u32(fdt, node, "height", height); 1715 if (ret < 0) 1716 return ret; 1717 1718 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1719 if (ret < 0) 1720 return ret; 1721 1722 ret = fdt_setprop_string(fdt, node, "format", format); 1723 if (ret < 0) 1724 return ret; 1725 1726 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1727 if (ret < 0) 1728 return ret; 1729 1730 return 0; 1731 } 1732 1733 /* 1734 * Update native-mode in display-timings from display environment variable. 1735 * The node to update are specified by path. 1736 */ 1737 int fdt_fixup_display(void *blob, const char *path, const char *display) 1738 { 1739 int off, toff; 1740 1741 if (!display || !path) 1742 return -FDT_ERR_NOTFOUND; 1743 1744 toff = fdt_path_offset(blob, path); 1745 if (toff >= 0) 1746 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1747 if (toff < 0) 1748 return toff; 1749 1750 for (off = fdt_first_subnode(blob, toff); 1751 off >= 0; 1752 off = fdt_next_subnode(blob, off)) { 1753 uint32_t h = fdt_get_phandle(blob, off); 1754 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1755 fdt32_to_cpu(h)); 1756 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1757 return fdt_setprop_u32(blob, toff, "native-mode", h); 1758 } 1759 return toff; 1760 } 1761 1762 #ifdef CONFIG_OF_LIBFDT_OVERLAY 1763 /** 1764 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting 1765 * 1766 * @fdt: ptr to device tree 1767 * @fdto: ptr to device tree overlay 1768 * 1769 * Convenience function to apply an overlay and display helpful messages 1770 * in the case of an error 1771 */ 1772 int fdt_overlay_apply_verbose(void *fdt, void *fdto) 1773 { 1774 int err; 1775 bool has_symbols; 1776 1777 err = fdt_path_offset(fdt, "/__symbols__"); 1778 has_symbols = err >= 0; 1779 1780 err = fdt_overlay_apply(fdt, fdto); 1781 if (err < 0) { 1782 printf("failed on fdt_overlay_apply(): %s\n", 1783 fdt_strerror(err)); 1784 if (!has_symbols) { 1785 printf("base fdt does did not have a /__symbols__ node\n"); 1786 printf("make sure you've compiled with -@\n"); 1787 } 1788 } 1789 return err; 1790 } 1791 #endif 1792