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 <stdio_dev.h> 12 #include <linux/ctype.h> 13 #include <linux/types.h> 14 #include <asm/global_data.h> 15 #include <libfdt.h> 16 #include <fdt_support.h> 17 #include <exports.h> 18 19 /* 20 * Global data (for the gd->bd) 21 */ 22 DECLARE_GLOBAL_DATA_PTR; 23 24 /* 25 * Get cells len in bytes 26 * if #NNNN-cells property is 2 then len is 8 27 * otherwise len is 4 28 */ 29 static int get_cells_len(void *blob, char *nr_cells_name) 30 { 31 const fdt32_t *cell; 32 33 cell = fdt_getprop(blob, 0, nr_cells_name, NULL); 34 if (cell && fdt32_to_cpu(*cell) == 2) 35 return 8; 36 37 return 4; 38 } 39 40 /* 41 * Write a 4 or 8 byte big endian cell 42 */ 43 static void write_cell(u8 *addr, u64 val, int size) 44 { 45 int shift = (size - 1) * 8; 46 while (size-- > 0) { 47 *addr++ = (val >> shift) & 0xff; 48 shift -= 8; 49 } 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 const fdt32_t *val; 67 int off; 68 69 off = fdt_path_offset(fdt, path); 70 if (off < 0) 71 return dflt; 72 73 val = fdt_getprop(fdt, off, prop, NULL); 74 if (val) 75 return fdt32_to_cpu(*val); 76 else 77 return dflt; 78 } 79 80 /** 81 * fdt_find_and_setprop: Find a node and set it's property 82 * 83 * @fdt: ptr to device tree 84 * @node: path of node 85 * @prop: property name 86 * @val: ptr to new value 87 * @len: length of new property value 88 * @create: flag to create the property if it doesn't exist 89 * 90 * Convenience function to directly set a property given the path to the node. 91 */ 92 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 93 const void *val, int len, int create) 94 { 95 int nodeoff = fdt_path_offset(fdt, node); 96 97 if (nodeoff < 0) 98 return nodeoff; 99 100 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) 101 return 0; /* create flag not set; so exit quietly */ 102 103 return fdt_setprop(fdt, nodeoff, prop, val, len); 104 } 105 106 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 107 108 #ifdef CONFIG_CONS_INDEX 109 static void fdt_fill_multisername(char *sername, size_t maxlen) 110 { 111 const char *outname = stdio_devices[stdout]->name; 112 113 if (strcmp(outname, "serial") > 0) 114 strncpy(sername, outname, maxlen); 115 116 /* eserial? */ 117 if (strcmp(outname + 1, "serial") > 0) 118 strncpy(sername, outname + 1, maxlen); 119 } 120 #endif 121 122 static int fdt_fixup_stdout(void *fdt, int chosenoff) 123 { 124 int err = 0; 125 #ifdef CONFIG_CONS_INDEX 126 int node; 127 char sername[9] = { 0 }; 128 const char *path; 129 130 fdt_fill_multisername(sername, sizeof(sername) - 1); 131 if (!sername[0]) 132 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 133 134 err = node = fdt_path_offset(fdt, "/aliases"); 135 if (node >= 0) { 136 int len; 137 path = fdt_getprop(fdt, node, sername, &len); 138 if (path) { 139 char *p = malloc(len); 140 err = -FDT_ERR_NOSPACE; 141 if (p) { 142 memcpy(p, path, len); 143 err = fdt_setprop(fdt, chosenoff, 144 "linux,stdout-path", p, len); 145 free(p); 146 } 147 } else { 148 err = len; 149 } 150 } 151 #endif 152 if (err < 0) 153 printf("WARNING: could not set linux,stdout-path %s.\n", 154 fdt_strerror(err)); 155 156 return err; 157 } 158 #endif 159 160 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force) 161 { 162 int nodeoffset, addr_cell_len; 163 int err, j, total; 164 fdt64_t tmp; 165 const char *path; 166 uint64_t addr, size; 167 168 /* Find the "chosen" node. */ 169 nodeoffset = fdt_path_offset (fdt, "/chosen"); 170 171 /* If there is no "chosen" node in the blob return */ 172 if (nodeoffset < 0) { 173 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset)); 174 return nodeoffset; 175 } 176 177 /* just return if initrd_start/end aren't valid */ 178 if ((initrd_start == 0) || (initrd_end == 0)) 179 return 0; 180 181 total = fdt_num_mem_rsv(fdt); 182 183 /* 184 * Look for an existing entry and update it. If we don't find 185 * the entry, we will j be the next available slot. 186 */ 187 for (j = 0; j < total; j++) { 188 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 189 if (addr == initrd_start) { 190 fdt_del_mem_rsv(fdt, j); 191 break; 192 } 193 } 194 195 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 196 if (err < 0) { 197 printf("fdt_initrd: %s\n", fdt_strerror(err)); 198 return err; 199 } 200 201 addr_cell_len = get_cells_len(fdt, "#address-cells"); 202 203 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL); 204 if ((path == NULL) || force) { 205 write_cell((u8 *)&tmp, initrd_start, addr_cell_len); 206 err = fdt_setprop(fdt, nodeoffset, 207 "linux,initrd-start", &tmp, addr_cell_len); 208 if (err < 0) { 209 printf("WARNING: " 210 "could not set linux,initrd-start %s.\n", 211 fdt_strerror(err)); 212 return err; 213 } 214 write_cell((u8 *)&tmp, initrd_end, addr_cell_len); 215 err = fdt_setprop(fdt, nodeoffset, 216 "linux,initrd-end", &tmp, addr_cell_len); 217 if (err < 0) { 218 printf("WARNING: could not set linux,initrd-end %s.\n", 219 fdt_strerror(err)); 220 221 return err; 222 } 223 } 224 225 return 0; 226 } 227 228 int fdt_chosen(void *fdt, int force) 229 { 230 int nodeoffset; 231 int err; 232 char *str; /* used to set string properties */ 233 const char *path; 234 235 err = fdt_check_header(fdt); 236 if (err < 0) { 237 printf("fdt_chosen: %s\n", fdt_strerror(err)); 238 return err; 239 } 240 241 /* 242 * Find the "chosen" node. 243 */ 244 nodeoffset = fdt_path_offset (fdt, "/chosen"); 245 246 /* 247 * If there is no "chosen" node in the blob, create it. 248 */ 249 if (nodeoffset < 0) { 250 /* 251 * Create a new node "/chosen" (offset 0 is root level) 252 */ 253 nodeoffset = fdt_add_subnode(fdt, 0, "chosen"); 254 if (nodeoffset < 0) { 255 printf("WARNING: could not create /chosen %s.\n", 256 fdt_strerror(nodeoffset)); 257 return nodeoffset; 258 } 259 } 260 261 /* 262 * Create /chosen properites that don't exist in the fdt. 263 * If the property exists, update it only if the "force" parameter 264 * is true. 265 */ 266 str = getenv("bootargs"); 267 if (str != NULL) { 268 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL); 269 if ((path == NULL) || force) { 270 err = fdt_setprop(fdt, nodeoffset, 271 "bootargs", str, strlen(str)+1); 272 if (err < 0) 273 printf("WARNING: could not set bootargs %s.\n", 274 fdt_strerror(err)); 275 } 276 } 277 278 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 279 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 280 if ((path == NULL) || force) 281 err = fdt_fixup_stdout(fdt, nodeoffset); 282 #endif 283 284 #ifdef OF_STDOUT_PATH 285 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 286 if ((path == NULL) || force) { 287 err = fdt_setprop(fdt, nodeoffset, 288 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1); 289 if (err < 0) 290 printf("WARNING: could not set linux,stdout-path %s.\n", 291 fdt_strerror(err)); 292 } 293 #endif 294 295 return err; 296 } 297 298 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 299 const void *val, int len, int create) 300 { 301 #if defined(DEBUG) 302 int i; 303 debug("Updating property '%s/%s' = ", path, prop); 304 for (i = 0; i < len; i++) 305 debug(" %.2x", *(u8*)(val+i)); 306 debug("\n"); 307 #endif 308 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 309 if (rc) 310 printf("Unable to update property %s:%s, err=%s\n", 311 path, prop, fdt_strerror(rc)); 312 } 313 314 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 315 u32 val, int create) 316 { 317 fdt32_t tmp = cpu_to_fdt32(val); 318 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 319 } 320 321 void do_fixup_by_prop(void *fdt, 322 const char *pname, const void *pval, int plen, 323 const char *prop, const void *val, int len, 324 int create) 325 { 326 int off; 327 #if defined(DEBUG) 328 int i; 329 debug("Updating property '%s' = ", prop); 330 for (i = 0; i < len; i++) 331 debug(" %.2x", *(u8*)(val+i)); 332 debug("\n"); 333 #endif 334 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 335 while (off != -FDT_ERR_NOTFOUND) { 336 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 337 fdt_setprop(fdt, off, prop, val, len); 338 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 339 } 340 } 341 342 void do_fixup_by_prop_u32(void *fdt, 343 const char *pname, const void *pval, int plen, 344 const char *prop, u32 val, int create) 345 { 346 fdt32_t tmp = cpu_to_fdt32(val); 347 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 348 } 349 350 void do_fixup_by_compat(void *fdt, const char *compat, 351 const char *prop, const void *val, int len, int create) 352 { 353 int off = -1; 354 #if defined(DEBUG) 355 int i; 356 debug("Updating property '%s' = ", prop); 357 for (i = 0; i < len; i++) 358 debug(" %.2x", *(u8*)(val+i)); 359 debug("\n"); 360 #endif 361 off = fdt_node_offset_by_compatible(fdt, -1, compat); 362 while (off != -FDT_ERR_NOTFOUND) { 363 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 364 fdt_setprop(fdt, off, prop, val, len); 365 off = fdt_node_offset_by_compatible(fdt, off, compat); 366 } 367 } 368 369 void do_fixup_by_compat_u32(void *fdt, const char *compat, 370 const char *prop, u32 val, int create) 371 { 372 fdt32_t tmp = cpu_to_fdt32(val); 373 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 374 } 375 376 #ifdef CONFIG_NR_DRAM_BANKS 377 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 378 #else 379 #define MEMORY_BANKS_MAX 4 380 #endif 381 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 382 { 383 int err, nodeoffset; 384 int addr_cell_len, size_cell_len, len; 385 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 386 int bank; 387 388 if (banks > MEMORY_BANKS_MAX) { 389 printf("%s: num banks %d exceeds hardcoded limit %d." 390 " Recompile with higher MEMORY_BANKS_MAX?\n", 391 __FUNCTION__, banks, MEMORY_BANKS_MAX); 392 return -1; 393 } 394 395 err = fdt_check_header(blob); 396 if (err < 0) { 397 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 398 return err; 399 } 400 401 /* update, or add and update /memory node */ 402 nodeoffset = fdt_path_offset(blob, "/memory"); 403 if (nodeoffset < 0) { 404 nodeoffset = fdt_add_subnode(blob, 0, "memory"); 405 if (nodeoffset < 0) { 406 printf("WARNING: could not create /memory: %s.\n", 407 fdt_strerror(nodeoffset)); 408 return nodeoffset; 409 } 410 } 411 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 412 sizeof("memory")); 413 if (err < 0) { 414 printf("WARNING: could not set %s %s.\n", "device_type", 415 fdt_strerror(err)); 416 return err; 417 } 418 419 addr_cell_len = get_cells_len(blob, "#address-cells"); 420 size_cell_len = get_cells_len(blob, "#size-cells"); 421 422 for (bank = 0, len = 0; bank < banks; bank++) { 423 write_cell(tmp + len, start[bank], addr_cell_len); 424 len += addr_cell_len; 425 426 write_cell(tmp + len, size[bank], size_cell_len); 427 len += size_cell_len; 428 } 429 430 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 431 if (err < 0) { 432 printf("WARNING: could not set %s %s.\n", 433 "reg", fdt_strerror(err)); 434 return err; 435 } 436 return 0; 437 } 438 439 int fdt_fixup_memory(void *blob, u64 start, u64 size) 440 { 441 return fdt_fixup_memory_banks(blob, &start, &size, 1); 442 } 443 444 void fdt_fixup_ethernet(void *fdt) 445 { 446 int node, i, j; 447 char enet[16], *tmp, *end; 448 char mac[16]; 449 const char *path; 450 unsigned char mac_addr[6]; 451 452 node = fdt_path_offset(fdt, "/aliases"); 453 if (node < 0) 454 return; 455 456 i = 0; 457 strcpy(mac, "ethaddr"); 458 while ((tmp = getenv(mac)) != NULL) { 459 sprintf(enet, "ethernet%d", i); 460 path = fdt_getprop(fdt, node, enet, NULL); 461 if (!path) { 462 debug("No alias for %s\n", enet); 463 sprintf(mac, "eth%daddr", ++i); 464 continue; 465 } 466 467 for (j = 0; j < 6; j++) { 468 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0; 469 if (tmp) 470 tmp = (*end) ? end+1 : end; 471 } 472 473 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0); 474 do_fixup_by_path(fdt, path, "local-mac-address", 475 &mac_addr, 6, 1); 476 477 sprintf(mac, "eth%daddr", ++i); 478 } 479 } 480 481 /* Resize the fdt to its actual size + a bit of padding */ 482 int fdt_resize(void *blob) 483 { 484 int i; 485 uint64_t addr, size; 486 int total, ret; 487 uint actualsize; 488 489 if (!blob) 490 return 0; 491 492 total = fdt_num_mem_rsv(blob); 493 for (i = 0; i < total; i++) { 494 fdt_get_mem_rsv(blob, i, &addr, &size); 495 if (addr == (uintptr_t)blob) { 496 fdt_del_mem_rsv(blob, i); 497 break; 498 } 499 } 500 501 /* 502 * Calculate the actual size of the fdt 503 * plus the size needed for 5 fdt_add_mem_rsv, one 504 * for the fdt itself and 4 for a possible initrd 505 * ((initrd-start + initrd-end) * 2 (name & value)) 506 */ 507 actualsize = fdt_off_dt_strings(blob) + 508 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 509 510 /* Make it so the fdt ends on a page boundary */ 511 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 512 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 513 514 /* Change the fdt header to reflect the correct size */ 515 fdt_set_totalsize(blob, actualsize); 516 517 /* Add the new reservation */ 518 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 519 if (ret < 0) 520 return ret; 521 522 return actualsize; 523 } 524 525 #ifdef CONFIG_PCI 526 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 527 528 #define FDT_PCI_PREFETCH (0x40000000) 529 #define FDT_PCI_MEM32 (0x02000000) 530 #define FDT_PCI_IO (0x01000000) 531 #define FDT_PCI_MEM64 (0x03000000) 532 533 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 534 535 int addrcell, sizecell, len, r; 536 u32 *dma_range; 537 /* sized based on pci addr cells, size-cells, & address-cells */ 538 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 539 540 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 541 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 542 543 dma_range = &dma_ranges[0]; 544 for (r = 0; r < hose->region_count; r++) { 545 u64 bus_start, phys_start, size; 546 547 /* skip if !PCI_REGION_SYS_MEMORY */ 548 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 549 continue; 550 551 bus_start = (u64)hose->regions[r].bus_start; 552 phys_start = (u64)hose->regions[r].phys_start; 553 size = (u64)hose->regions[r].size; 554 555 dma_range[0] = 0; 556 if (size >= 0x100000000ull) 557 dma_range[0] |= FDT_PCI_MEM64; 558 else 559 dma_range[0] |= FDT_PCI_MEM32; 560 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 561 dma_range[0] |= FDT_PCI_PREFETCH; 562 #ifdef CONFIG_SYS_PCI_64BIT 563 dma_range[1] = bus_start >> 32; 564 #else 565 dma_range[1] = 0; 566 #endif 567 dma_range[2] = bus_start & 0xffffffff; 568 569 if (addrcell == 2) { 570 dma_range[3] = phys_start >> 32; 571 dma_range[4] = phys_start & 0xffffffff; 572 } else { 573 dma_range[3] = phys_start & 0xffffffff; 574 } 575 576 if (sizecell == 2) { 577 dma_range[3 + addrcell + 0] = size >> 32; 578 dma_range[3 + addrcell + 1] = size & 0xffffffff; 579 } else { 580 dma_range[3 + addrcell + 0] = size & 0xffffffff; 581 } 582 583 dma_range += (3 + addrcell + sizecell); 584 } 585 586 len = dma_range - &dma_ranges[0]; 587 if (len) 588 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 589 590 return 0; 591 } 592 #endif 593 594 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE 595 /* 596 * Provide a weak default function to return the flash bank size. 597 * There might be multiple non-identical flash chips connected to one 598 * chip-select, so we need to pass an index as well. 599 */ 600 u32 __flash_get_bank_size(int cs, int idx) 601 { 602 extern flash_info_t flash_info[]; 603 604 /* 605 * As default, a simple 1:1 mapping is provided. Boards with 606 * a different mapping need to supply a board specific mapping 607 * routine. 608 */ 609 return flash_info[cs].size; 610 } 611 u32 flash_get_bank_size(int cs, int idx) 612 __attribute__((weak, alias("__flash_get_bank_size"))); 613 614 /* 615 * This function can be used to update the size in the "reg" property 616 * of all NOR FLASH device nodes. This is necessary for boards with 617 * non-fixed NOR FLASH sizes. 618 */ 619 int fdt_fixup_nor_flash_size(void *blob) 620 { 621 char compat[][16] = { "cfi-flash", "jedec-flash" }; 622 int off; 623 int len; 624 struct fdt_property *prop; 625 u32 *reg, *reg2; 626 int i; 627 628 for (i = 0; i < 2; i++) { 629 off = fdt_node_offset_by_compatible(blob, -1, compat[i]); 630 while (off != -FDT_ERR_NOTFOUND) { 631 int idx; 632 633 /* 634 * Found one compatible node, so fixup the size 635 * int its reg properties 636 */ 637 prop = fdt_get_property_w(blob, off, "reg", &len); 638 if (prop) { 639 int tuple_size = 3 * sizeof(reg); 640 641 /* 642 * There might be multiple reg-tuples, 643 * so loop through them all 644 */ 645 reg = reg2 = (u32 *)&prop->data[0]; 646 for (idx = 0; idx < (len / tuple_size); idx++) { 647 /* 648 * Update size in reg property 649 */ 650 reg[2] = flash_get_bank_size(reg[0], 651 idx); 652 653 /* 654 * Point to next reg tuple 655 */ 656 reg += 3; 657 } 658 659 fdt_setprop(blob, off, "reg", reg2, len); 660 } 661 662 /* Move to next compatible node */ 663 off = fdt_node_offset_by_compatible(blob, off, 664 compat[i]); 665 } 666 } 667 668 return 0; 669 } 670 #endif 671 672 int fdt_increase_size(void *fdt, int add_len) 673 { 674 int newlen; 675 676 newlen = fdt_totalsize(fdt) + add_len; 677 678 /* Open in place with a new len */ 679 return fdt_open_into(fdt, fdt, newlen); 680 } 681 682 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 683 #include <jffs2/load_kernel.h> 684 #include <mtd_node.h> 685 686 struct reg_cell { 687 unsigned int r0; 688 unsigned int r1; 689 }; 690 691 int fdt_del_subnodes(const void *blob, int parent_offset) 692 { 693 int off, ndepth; 694 int ret; 695 696 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 697 (off >= 0) && (ndepth > 0); 698 off = fdt_next_node(blob, off, &ndepth)) { 699 if (ndepth == 1) { 700 debug("delete %s: offset: %x\n", 701 fdt_get_name(blob, off, 0), off); 702 ret = fdt_del_node((void *)blob, off); 703 if (ret < 0) { 704 printf("Can't delete node: %s\n", 705 fdt_strerror(ret)); 706 return ret; 707 } else { 708 ndepth = 0; 709 off = parent_offset; 710 } 711 } 712 } 713 return 0; 714 } 715 716 int fdt_del_partitions(void *blob, int parent_offset) 717 { 718 const void *prop; 719 int ndepth = 0; 720 int off; 721 int ret; 722 723 off = fdt_next_node(blob, parent_offset, &ndepth); 724 if (off > 0 && ndepth == 1) { 725 prop = fdt_getprop(blob, off, "label", NULL); 726 if (prop == NULL) { 727 /* 728 * Could not find label property, nand {}; node? 729 * Check subnode, delete partitions there if any. 730 */ 731 return fdt_del_partitions(blob, off); 732 } else { 733 ret = fdt_del_subnodes(blob, parent_offset); 734 if (ret < 0) { 735 printf("Can't remove subnodes: %s\n", 736 fdt_strerror(ret)); 737 return ret; 738 } 739 } 740 } 741 return 0; 742 } 743 744 int fdt_node_set_part_info(void *blob, int parent_offset, 745 struct mtd_device *dev) 746 { 747 struct list_head *pentry; 748 struct part_info *part; 749 struct reg_cell cell; 750 int off, ndepth = 0; 751 int part_num, ret; 752 char buf[64]; 753 754 ret = fdt_del_partitions(blob, parent_offset); 755 if (ret < 0) 756 return ret; 757 758 /* 759 * Check if it is nand {}; subnode, adjust 760 * the offset in this case 761 */ 762 off = fdt_next_node(blob, parent_offset, &ndepth); 763 if (off > 0 && ndepth == 1) 764 parent_offset = off; 765 766 part_num = 0; 767 list_for_each_prev(pentry, &dev->parts) { 768 int newoff; 769 770 part = list_entry(pentry, struct part_info, link); 771 772 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 773 part_num, part->name, part->size, 774 part->offset, part->mask_flags); 775 776 sprintf(buf, "partition@%llx", part->offset); 777 add_sub: 778 ret = fdt_add_subnode(blob, parent_offset, buf); 779 if (ret == -FDT_ERR_NOSPACE) { 780 ret = fdt_increase_size(blob, 512); 781 if (!ret) 782 goto add_sub; 783 else 784 goto err_size; 785 } else if (ret < 0) { 786 printf("Can't add partition node: %s\n", 787 fdt_strerror(ret)); 788 return ret; 789 } 790 newoff = ret; 791 792 /* Check MTD_WRITEABLE_CMD flag */ 793 if (part->mask_flags & 1) { 794 add_ro: 795 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 796 if (ret == -FDT_ERR_NOSPACE) { 797 ret = fdt_increase_size(blob, 512); 798 if (!ret) 799 goto add_ro; 800 else 801 goto err_size; 802 } else if (ret < 0) 803 goto err_prop; 804 } 805 806 cell.r0 = cpu_to_fdt32(part->offset); 807 cell.r1 = cpu_to_fdt32(part->size); 808 add_reg: 809 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 810 if (ret == -FDT_ERR_NOSPACE) { 811 ret = fdt_increase_size(blob, 512); 812 if (!ret) 813 goto add_reg; 814 else 815 goto err_size; 816 } else if (ret < 0) 817 goto err_prop; 818 819 add_label: 820 ret = fdt_setprop_string(blob, newoff, "label", part->name); 821 if (ret == -FDT_ERR_NOSPACE) { 822 ret = fdt_increase_size(blob, 512); 823 if (!ret) 824 goto add_label; 825 else 826 goto err_size; 827 } else if (ret < 0) 828 goto err_prop; 829 830 part_num++; 831 } 832 return 0; 833 err_size: 834 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 835 return ret; 836 err_prop: 837 printf("Can't add property: %s\n", fdt_strerror(ret)); 838 return ret; 839 } 840 841 /* 842 * Update partitions in nor/nand nodes using info from 843 * mtdparts environment variable. The nodes to update are 844 * specified by node_info structure which contains mtd device 845 * type and compatible string: E. g. the board code in 846 * ft_board_setup() could use: 847 * 848 * struct node_info nodes[] = { 849 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 850 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 851 * }; 852 * 853 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 854 */ 855 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 856 { 857 struct node_info *ni = node_info; 858 struct mtd_device *dev; 859 char *parts; 860 int i, idx; 861 int noff; 862 863 parts = getenv("mtdparts"); 864 if (!parts) 865 return; 866 867 if (mtdparts_init() != 0) 868 return; 869 870 for (i = 0; i < node_info_size; i++) { 871 idx = 0; 872 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 873 while (noff != -FDT_ERR_NOTFOUND) { 874 debug("%s: %s, mtd dev type %d\n", 875 fdt_get_name(blob, noff, 0), 876 ni[i].compat, ni[i].type); 877 dev = device_find(ni[i].type, idx++); 878 if (dev) { 879 if (fdt_node_set_part_info(blob, noff, dev)) 880 return; /* return on error */ 881 } 882 883 /* Jump to next flash node */ 884 noff = fdt_node_offset_by_compatible(blob, noff, 885 ni[i].compat); 886 } 887 } 888 } 889 #endif 890 891 void fdt_del_node_and_alias(void *blob, const char *alias) 892 { 893 int off = fdt_path_offset(blob, alias); 894 895 if (off < 0) 896 return; 897 898 fdt_del_node(blob, off); 899 900 off = fdt_path_offset(blob, "/aliases"); 901 fdt_delprop(blob, off, alias); 902 } 903 904 /* Helper to read a big number; size is in cells (not bytes) */ 905 static inline u64 of_read_number(const fdt32_t *cell, int size) 906 { 907 u64 r = 0; 908 while (size--) 909 r = (r << 32) | fdt32_to_cpu(*(cell++)); 910 return r; 911 } 912 913 #define PRu64 "%llx" 914 915 /* Max address size we deal with */ 916 #define OF_MAX_ADDR_CELLS 4 917 #define OF_BAD_ADDR ((u64)-1) 918 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 919 (ns) > 0) 920 921 /* Debug utility */ 922 #ifdef DEBUG 923 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 924 { 925 printf("%s", s); 926 while(na--) 927 printf(" %08x", *(addr++)); 928 printf("\n"); 929 } 930 #else 931 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 932 #endif 933 934 /* Callbacks for bus specific translators */ 935 struct of_bus { 936 const char *name; 937 const char *addresses; 938 void (*count_cells)(void *blob, int parentoffset, 939 int *addrc, int *sizec); 940 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 941 int na, int ns, int pna); 942 int (*translate)(fdt32_t *addr, u64 offset, int na); 943 }; 944 945 /* Default translator (generic bus) */ 946 static void of_bus_default_count_cells(void *blob, int parentoffset, 947 int *addrc, int *sizec) 948 { 949 const fdt32_t *prop; 950 951 if (addrc) { 952 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL); 953 if (prop) 954 *addrc = be32_to_cpup(prop); 955 else 956 *addrc = 2; 957 } 958 959 if (sizec) { 960 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 961 if (prop) 962 *sizec = be32_to_cpup(prop); 963 else 964 *sizec = 1; 965 } 966 } 967 968 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 969 int na, int ns, int pna) 970 { 971 u64 cp, s, da; 972 973 cp = of_read_number(range, na); 974 s = of_read_number(range + na + pna, ns); 975 da = of_read_number(addr, na); 976 977 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n", 978 cp, s, da); 979 980 if (da < cp || da >= (cp + s)) 981 return OF_BAD_ADDR; 982 return da - cp; 983 } 984 985 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 986 { 987 u64 a = of_read_number(addr, na); 988 memset(addr, 0, na * 4); 989 a += offset; 990 if (na > 1) 991 addr[na - 2] = cpu_to_fdt32(a >> 32); 992 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 993 994 return 0; 995 } 996 997 /* Array of bus specific translators */ 998 static struct of_bus of_busses[] = { 999 /* Default */ 1000 { 1001 .name = "default", 1002 .addresses = "reg", 1003 .count_cells = of_bus_default_count_cells, 1004 .map = of_bus_default_map, 1005 .translate = of_bus_default_translate, 1006 }, 1007 }; 1008 1009 static int of_translate_one(void * blob, int parent, struct of_bus *bus, 1010 struct of_bus *pbus, fdt32_t *addr, 1011 int na, int ns, int pna, const char *rprop) 1012 { 1013 const fdt32_t *ranges; 1014 int rlen; 1015 int rone; 1016 u64 offset = OF_BAD_ADDR; 1017 1018 /* Normally, an absence of a "ranges" property means we are 1019 * crossing a non-translatable boundary, and thus the addresses 1020 * below the current not cannot be converted to CPU physical ones. 1021 * Unfortunately, while this is very clear in the spec, it's not 1022 * what Apple understood, and they do have things like /uni-n or 1023 * /ht nodes with no "ranges" property and a lot of perfectly 1024 * useable mapped devices below them. Thus we treat the absence of 1025 * "ranges" as equivalent to an empty "ranges" property which means 1026 * a 1:1 translation at that level. It's up to the caller not to try 1027 * to translate addresses that aren't supposed to be translated in 1028 * the first place. --BenH. 1029 */ 1030 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1031 if (ranges == NULL || rlen == 0) { 1032 offset = of_read_number(addr, na); 1033 memset(addr, 0, pna * 4); 1034 debug("OF: no ranges, 1:1 translation\n"); 1035 goto finish; 1036 } 1037 1038 debug("OF: walking ranges...\n"); 1039 1040 /* Now walk through the ranges */ 1041 rlen /= 4; 1042 rone = na + pna + ns; 1043 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1044 offset = bus->map(addr, ranges, na, ns, pna); 1045 if (offset != OF_BAD_ADDR) 1046 break; 1047 } 1048 if (offset == OF_BAD_ADDR) { 1049 debug("OF: not found !\n"); 1050 return 1; 1051 } 1052 memcpy(addr, ranges + na, 4 * pna); 1053 1054 finish: 1055 of_dump_addr("OF: parent translation for:", addr, pna); 1056 debug("OF: with offset: "PRu64"\n", offset); 1057 1058 /* Translate it into parent bus space */ 1059 return pbus->translate(addr, offset, pna); 1060 } 1061 1062 /* 1063 * Translate an address from the device-tree into a CPU physical address, 1064 * this walks up the tree and applies the various bus mappings on the 1065 * way. 1066 * 1067 * Note: We consider that crossing any level with #size-cells == 0 to mean 1068 * that translation is impossible (that is we are not dealing with a value 1069 * that can be mapped to a cpu physical address). This is not really specified 1070 * that way, but this is traditionally the way IBM at least do things 1071 */ 1072 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr, 1073 const char *rprop) 1074 { 1075 int parent; 1076 struct of_bus *bus, *pbus; 1077 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1078 int na, ns, pna, pns; 1079 u64 result = OF_BAD_ADDR; 1080 1081 debug("OF: ** translation for device %s **\n", 1082 fdt_get_name(blob, node_offset, NULL)); 1083 1084 /* Get parent & match bus type */ 1085 parent = fdt_parent_offset(blob, node_offset); 1086 if (parent < 0) 1087 goto bail; 1088 bus = &of_busses[0]; 1089 1090 /* Cound address cells & copy address locally */ 1091 bus->count_cells(blob, parent, &na, &ns); 1092 if (!OF_CHECK_COUNTS(na, ns)) { 1093 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1094 fdt_get_name(blob, node_offset, NULL)); 1095 goto bail; 1096 } 1097 memcpy(addr, in_addr, na * 4); 1098 1099 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1100 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1101 of_dump_addr("OF: translating address:", addr, na); 1102 1103 /* Translate */ 1104 for (;;) { 1105 /* Switch to parent bus */ 1106 node_offset = parent; 1107 parent = fdt_parent_offset(blob, node_offset); 1108 1109 /* If root, we have finished */ 1110 if (parent < 0) { 1111 debug("OF: reached root node\n"); 1112 result = of_read_number(addr, na); 1113 break; 1114 } 1115 1116 /* Get new parent bus and counts */ 1117 pbus = &of_busses[0]; 1118 pbus->count_cells(blob, parent, &pna, &pns); 1119 if (!OF_CHECK_COUNTS(pna, pns)) { 1120 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1121 fdt_get_name(blob, node_offset, NULL)); 1122 break; 1123 } 1124 1125 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1126 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1127 1128 /* Apply bus translation */ 1129 if (of_translate_one(blob, node_offset, bus, pbus, 1130 addr, na, ns, pna, rprop)) 1131 break; 1132 1133 /* Complete the move up one level */ 1134 na = pna; 1135 ns = pns; 1136 bus = pbus; 1137 1138 of_dump_addr("OF: one level translation:", addr, na); 1139 } 1140 bail: 1141 1142 return result; 1143 } 1144 1145 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr) 1146 { 1147 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1148 } 1149 1150 /** 1151 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1152 * who's reg property matches a physical cpu address 1153 * 1154 * @blob: ptr to device tree 1155 * @compat: compatiable string to match 1156 * @compat_off: property name 1157 * 1158 */ 1159 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1160 phys_addr_t compat_off) 1161 { 1162 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1163 while (off != -FDT_ERR_NOTFOUND) { 1164 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1165 if (reg) { 1166 if (compat_off == fdt_translate_address(blob, off, reg)) 1167 return off; 1168 } 1169 off = fdt_node_offset_by_compatible(blob, off, compat); 1170 } 1171 1172 return -FDT_ERR_NOTFOUND; 1173 } 1174 1175 /** 1176 * fdt_alloc_phandle: Return next free phandle value 1177 * 1178 * @blob: ptr to device tree 1179 */ 1180 int fdt_alloc_phandle(void *blob) 1181 { 1182 int offset, phandle = 0; 1183 1184 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1185 offset = fdt_next_node(blob, offset, NULL)) { 1186 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1187 } 1188 1189 return phandle + 1; 1190 } 1191 1192 /* 1193 * fdt_set_phandle: Create a phandle property for the given node 1194 * 1195 * @fdt: ptr to device tree 1196 * @nodeoffset: node to update 1197 * @phandle: phandle value to set (must be unique) 1198 */ 1199 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1200 { 1201 int ret; 1202 1203 #ifdef DEBUG 1204 int off = fdt_node_offset_by_phandle(fdt, phandle); 1205 1206 if ((off >= 0) && (off != nodeoffset)) { 1207 char buf[64]; 1208 1209 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1210 printf("Trying to update node %s with phandle %u ", 1211 buf, phandle); 1212 1213 fdt_get_path(fdt, off, buf, sizeof(buf)); 1214 printf("that already exists in node %s.\n", buf); 1215 return -FDT_ERR_BADPHANDLE; 1216 } 1217 #endif 1218 1219 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1220 if (ret < 0) 1221 return ret; 1222 1223 /* 1224 * For now, also set the deprecated "linux,phandle" property, so that we 1225 * don't break older kernels. 1226 */ 1227 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1228 1229 return ret; 1230 } 1231 1232 /* 1233 * fdt_create_phandle: Create a phandle property for the given node 1234 * 1235 * @fdt: ptr to device tree 1236 * @nodeoffset: node to update 1237 */ 1238 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1239 { 1240 /* see if there is a phandle already */ 1241 int phandle = fdt_get_phandle(fdt, nodeoffset); 1242 1243 /* if we got 0, means no phandle so create one */ 1244 if (phandle == 0) { 1245 int ret; 1246 1247 phandle = fdt_alloc_phandle(fdt); 1248 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1249 if (ret < 0) { 1250 printf("Can't set phandle %u: %s\n", phandle, 1251 fdt_strerror(ret)); 1252 return 0; 1253 } 1254 } 1255 1256 return phandle; 1257 } 1258 1259 /* 1260 * fdt_set_node_status: Set status for the given node 1261 * 1262 * @fdt: ptr to device tree 1263 * @nodeoffset: node to update 1264 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1265 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1266 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1267 */ 1268 int fdt_set_node_status(void *fdt, int nodeoffset, 1269 enum fdt_status status, unsigned int error_code) 1270 { 1271 char buf[16]; 1272 int ret = 0; 1273 1274 if (nodeoffset < 0) 1275 return nodeoffset; 1276 1277 switch (status) { 1278 case FDT_STATUS_OKAY: 1279 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1280 break; 1281 case FDT_STATUS_DISABLED: 1282 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1283 break; 1284 case FDT_STATUS_FAIL: 1285 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1286 break; 1287 case FDT_STATUS_FAIL_ERROR_CODE: 1288 sprintf(buf, "fail-%d", error_code); 1289 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1290 break; 1291 default: 1292 printf("Invalid fdt status: %x\n", status); 1293 ret = -1; 1294 break; 1295 } 1296 1297 return ret; 1298 } 1299 1300 /* 1301 * fdt_set_status_by_alias: Set status for the given node given an alias 1302 * 1303 * @fdt: ptr to device tree 1304 * @alias: alias of node to update 1305 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1306 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1307 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1308 */ 1309 int fdt_set_status_by_alias(void *fdt, const char* alias, 1310 enum fdt_status status, unsigned int error_code) 1311 { 1312 int offset = fdt_path_offset(fdt, alias); 1313 1314 return fdt_set_node_status(fdt, offset, status, error_code); 1315 } 1316 1317 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1318 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1319 { 1320 int noff; 1321 int ret; 1322 1323 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1324 if (noff != -FDT_ERR_NOTFOUND) { 1325 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1326 add_edid: 1327 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1328 if (ret == -FDT_ERR_NOSPACE) { 1329 ret = fdt_increase_size(blob, 512); 1330 if (!ret) 1331 goto add_edid; 1332 else 1333 goto err_size; 1334 } else if (ret < 0) { 1335 printf("Can't add property: %s\n", fdt_strerror(ret)); 1336 return ret; 1337 } 1338 } 1339 return 0; 1340 err_size: 1341 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1342 return ret; 1343 } 1344 #endif 1345 1346 /* 1347 * Verify the physical address of device tree node for a given alias 1348 * 1349 * This function locates the device tree node of a given alias, and then 1350 * verifies that the physical address of that device matches the given 1351 * parameter. It displays a message if there is a mismatch. 1352 * 1353 * Returns 1 on success, 0 on failure 1354 */ 1355 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1356 { 1357 const char *path; 1358 const fdt32_t *reg; 1359 int node, len; 1360 u64 dt_addr; 1361 1362 path = fdt_getprop(fdt, anode, alias, NULL); 1363 if (!path) { 1364 /* If there's no such alias, then it's not a failure */ 1365 return 1; 1366 } 1367 1368 node = fdt_path_offset(fdt, path); 1369 if (node < 0) { 1370 printf("Warning: device tree alias '%s' points to invalid " 1371 "node %s.\n", alias, path); 1372 return 0; 1373 } 1374 1375 reg = fdt_getprop(fdt, node, "reg", &len); 1376 if (!reg) { 1377 printf("Warning: device tree node '%s' has no address.\n", 1378 path); 1379 return 0; 1380 } 1381 1382 dt_addr = fdt_translate_address(fdt, node, reg); 1383 if (addr != dt_addr) { 1384 printf("Warning: U-Boot configured device %s at address %llx,\n" 1385 " but the device tree has it address %llx.\n", 1386 alias, addr, dt_addr); 1387 return 0; 1388 } 1389 1390 return 1; 1391 } 1392 1393 /* 1394 * Returns the base address of an SOC or PCI node 1395 */ 1396 u64 fdt_get_base_address(void *fdt, int node) 1397 { 1398 int size; 1399 u32 naddr; 1400 const fdt32_t *prop; 1401 1402 prop = fdt_getprop(fdt, node, "#address-cells", &size); 1403 if (prop && size == 4) 1404 naddr = be32_to_cpup(prop); 1405 else 1406 naddr = 2; 1407 1408 prop = fdt_getprop(fdt, node, "ranges", &size); 1409 1410 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0; 1411 } 1412