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, sizeof(tmp)); 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, sizeof(tmp)); 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 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 411 sizeof("memory")); 412 if (err < 0) { 413 printf("WARNING: could not set %s %s.\n", "device_type", 414 fdt_strerror(err)); 415 return err; 416 } 417 418 addr_cell_len = get_cells_len(blob, "#address-cells"); 419 size_cell_len = get_cells_len(blob, "#size-cells"); 420 421 for (bank = 0, len = 0; bank < banks; bank++) { 422 write_cell(tmp + len, start[bank], addr_cell_len); 423 len += addr_cell_len; 424 425 write_cell(tmp + len, size[bank], size_cell_len); 426 len += size_cell_len; 427 } 428 429 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 430 if (err < 0) { 431 printf("WARNING: could not set %s %s.\n", 432 "reg", fdt_strerror(err)); 433 return err; 434 } 435 return 0; 436 } 437 438 int fdt_fixup_memory(void *blob, u64 start, u64 size) 439 { 440 return fdt_fixup_memory_banks(blob, &start, &size, 1); 441 } 442 443 void fdt_fixup_ethernet(void *fdt) 444 { 445 int node, i, j; 446 char enet[16], *tmp, *end; 447 char mac[16]; 448 const char *path; 449 unsigned char mac_addr[6]; 450 451 node = fdt_path_offset(fdt, "/aliases"); 452 if (node < 0) 453 return; 454 455 i = 0; 456 strcpy(mac, "ethaddr"); 457 while ((tmp = getenv(mac)) != NULL) { 458 sprintf(enet, "ethernet%d", i); 459 path = fdt_getprop(fdt, node, enet, NULL); 460 if (!path) { 461 debug("No alias for %s\n", enet); 462 sprintf(mac, "eth%daddr", ++i); 463 continue; 464 } 465 466 for (j = 0; j < 6; j++) { 467 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0; 468 if (tmp) 469 tmp = (*end) ? end+1 : end; 470 } 471 472 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0); 473 do_fixup_by_path(fdt, path, "local-mac-address", 474 &mac_addr, 6, 1); 475 476 sprintf(mac, "eth%daddr", ++i); 477 } 478 } 479 480 /* Resize the fdt to its actual size + a bit of padding */ 481 int fdt_resize(void *blob) 482 { 483 int i; 484 uint64_t addr, size; 485 int total, ret; 486 uint actualsize; 487 488 if (!blob) 489 return 0; 490 491 total = fdt_num_mem_rsv(blob); 492 for (i = 0; i < total; i++) { 493 fdt_get_mem_rsv(blob, i, &addr, &size); 494 if (addr == (uintptr_t)blob) { 495 fdt_del_mem_rsv(blob, i); 496 break; 497 } 498 } 499 500 /* 501 * Calculate the actual size of the fdt 502 * plus the size needed for 5 fdt_add_mem_rsv, one 503 * for the fdt itself and 4 for a possible initrd 504 * ((initrd-start + initrd-end) * 2 (name & value)) 505 */ 506 actualsize = fdt_off_dt_strings(blob) + 507 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 508 509 /* Make it so the fdt ends on a page boundary */ 510 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 511 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 512 513 /* Change the fdt header to reflect the correct size */ 514 fdt_set_totalsize(blob, actualsize); 515 516 /* Add the new reservation */ 517 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 518 if (ret < 0) 519 return ret; 520 521 return actualsize; 522 } 523 524 #ifdef CONFIG_PCI 525 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 526 527 #define FDT_PCI_PREFETCH (0x40000000) 528 #define FDT_PCI_MEM32 (0x02000000) 529 #define FDT_PCI_IO (0x01000000) 530 #define FDT_PCI_MEM64 (0x03000000) 531 532 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 533 534 int addrcell, sizecell, len, r; 535 u32 *dma_range; 536 /* sized based on pci addr cells, size-cells, & address-cells */ 537 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 538 539 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 540 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 541 542 dma_range = &dma_ranges[0]; 543 for (r = 0; r < hose->region_count; r++) { 544 u64 bus_start, phys_start, size; 545 546 /* skip if !PCI_REGION_SYS_MEMORY */ 547 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 548 continue; 549 550 bus_start = (u64)hose->regions[r].bus_start; 551 phys_start = (u64)hose->regions[r].phys_start; 552 size = (u64)hose->regions[r].size; 553 554 dma_range[0] = 0; 555 if (size >= 0x100000000ull) 556 dma_range[0] |= FDT_PCI_MEM64; 557 else 558 dma_range[0] |= FDT_PCI_MEM32; 559 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 560 dma_range[0] |= FDT_PCI_PREFETCH; 561 #ifdef CONFIG_SYS_PCI_64BIT 562 dma_range[1] = bus_start >> 32; 563 #else 564 dma_range[1] = 0; 565 #endif 566 dma_range[2] = bus_start & 0xffffffff; 567 568 if (addrcell == 2) { 569 dma_range[3] = phys_start >> 32; 570 dma_range[4] = phys_start & 0xffffffff; 571 } else { 572 dma_range[3] = phys_start & 0xffffffff; 573 } 574 575 if (sizecell == 2) { 576 dma_range[3 + addrcell + 0] = size >> 32; 577 dma_range[3 + addrcell + 1] = size & 0xffffffff; 578 } else { 579 dma_range[3 + addrcell + 0] = size & 0xffffffff; 580 } 581 582 dma_range += (3 + addrcell + sizecell); 583 } 584 585 len = dma_range - &dma_ranges[0]; 586 if (len) 587 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 588 589 return 0; 590 } 591 #endif 592 593 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE 594 /* 595 * Provide a weak default function to return the flash bank size. 596 * There might be multiple non-identical flash chips connected to one 597 * chip-select, so we need to pass an index as well. 598 */ 599 u32 __flash_get_bank_size(int cs, int idx) 600 { 601 extern flash_info_t flash_info[]; 602 603 /* 604 * As default, a simple 1:1 mapping is provided. Boards with 605 * a different mapping need to supply a board specific mapping 606 * routine. 607 */ 608 return flash_info[cs].size; 609 } 610 u32 flash_get_bank_size(int cs, int idx) 611 __attribute__((weak, alias("__flash_get_bank_size"))); 612 613 /* 614 * This function can be used to update the size in the "reg" property 615 * of all NOR FLASH device nodes. This is necessary for boards with 616 * non-fixed NOR FLASH sizes. 617 */ 618 int fdt_fixup_nor_flash_size(void *blob) 619 { 620 char compat[][16] = { "cfi-flash", "jedec-flash" }; 621 int off; 622 int len; 623 struct fdt_property *prop; 624 u32 *reg, *reg2; 625 int i; 626 627 for (i = 0; i < 2; i++) { 628 off = fdt_node_offset_by_compatible(blob, -1, compat[i]); 629 while (off != -FDT_ERR_NOTFOUND) { 630 int idx; 631 632 /* 633 * Found one compatible node, so fixup the size 634 * int its reg properties 635 */ 636 prop = fdt_get_property_w(blob, off, "reg", &len); 637 if (prop) { 638 int tuple_size = 3 * sizeof(reg); 639 640 /* 641 * There might be multiple reg-tuples, 642 * so loop through them all 643 */ 644 reg = reg2 = (u32 *)&prop->data[0]; 645 for (idx = 0; idx < (len / tuple_size); idx++) { 646 /* 647 * Update size in reg property 648 */ 649 reg[2] = flash_get_bank_size(reg[0], 650 idx); 651 652 /* 653 * Point to next reg tuple 654 */ 655 reg += 3; 656 } 657 658 fdt_setprop(blob, off, "reg", reg2, len); 659 } 660 661 /* Move to next compatible node */ 662 off = fdt_node_offset_by_compatible(blob, off, 663 compat[i]); 664 } 665 } 666 667 return 0; 668 } 669 #endif 670 671 int fdt_increase_size(void *fdt, int add_len) 672 { 673 int newlen; 674 675 newlen = fdt_totalsize(fdt) + add_len; 676 677 /* Open in place with a new len */ 678 return fdt_open_into(fdt, fdt, newlen); 679 } 680 681 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 682 #include <jffs2/load_kernel.h> 683 #include <mtd_node.h> 684 685 struct reg_cell { 686 unsigned int r0; 687 unsigned int r1; 688 }; 689 690 int fdt_del_subnodes(const void *blob, int parent_offset) 691 { 692 int off, ndepth; 693 int ret; 694 695 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 696 (off >= 0) && (ndepth > 0); 697 off = fdt_next_node(blob, off, &ndepth)) { 698 if (ndepth == 1) { 699 debug("delete %s: offset: %x\n", 700 fdt_get_name(blob, off, 0), off); 701 ret = fdt_del_node((void *)blob, off); 702 if (ret < 0) { 703 printf("Can't delete node: %s\n", 704 fdt_strerror(ret)); 705 return ret; 706 } else { 707 ndepth = 0; 708 off = parent_offset; 709 } 710 } 711 } 712 return 0; 713 } 714 715 int fdt_del_partitions(void *blob, int parent_offset) 716 { 717 const void *prop; 718 int ndepth = 0; 719 int off; 720 int ret; 721 722 off = fdt_next_node(blob, parent_offset, &ndepth); 723 if (off > 0 && ndepth == 1) { 724 prop = fdt_getprop(blob, off, "label", NULL); 725 if (prop == NULL) { 726 /* 727 * Could not find label property, nand {}; node? 728 * Check subnode, delete partitions there if any. 729 */ 730 return fdt_del_partitions(blob, off); 731 } else { 732 ret = fdt_del_subnodes(blob, parent_offset); 733 if (ret < 0) { 734 printf("Can't remove subnodes: %s\n", 735 fdt_strerror(ret)); 736 return ret; 737 } 738 } 739 } 740 return 0; 741 } 742 743 int fdt_node_set_part_info(void *blob, int parent_offset, 744 struct mtd_device *dev) 745 { 746 struct list_head *pentry; 747 struct part_info *part; 748 struct reg_cell cell; 749 int off, ndepth = 0; 750 int part_num, ret; 751 char buf[64]; 752 753 ret = fdt_del_partitions(blob, parent_offset); 754 if (ret < 0) 755 return ret; 756 757 /* 758 * Check if it is nand {}; subnode, adjust 759 * the offset in this case 760 */ 761 off = fdt_next_node(blob, parent_offset, &ndepth); 762 if (off > 0 && ndepth == 1) 763 parent_offset = off; 764 765 part_num = 0; 766 list_for_each_prev(pentry, &dev->parts) { 767 int newoff; 768 769 part = list_entry(pentry, struct part_info, link); 770 771 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 772 part_num, part->name, part->size, 773 part->offset, part->mask_flags); 774 775 sprintf(buf, "partition@%llx", part->offset); 776 add_sub: 777 ret = fdt_add_subnode(blob, parent_offset, buf); 778 if (ret == -FDT_ERR_NOSPACE) { 779 ret = fdt_increase_size(blob, 512); 780 if (!ret) 781 goto add_sub; 782 else 783 goto err_size; 784 } else if (ret < 0) { 785 printf("Can't add partition node: %s\n", 786 fdt_strerror(ret)); 787 return ret; 788 } 789 newoff = ret; 790 791 /* Check MTD_WRITEABLE_CMD flag */ 792 if (part->mask_flags & 1) { 793 add_ro: 794 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 795 if (ret == -FDT_ERR_NOSPACE) { 796 ret = fdt_increase_size(blob, 512); 797 if (!ret) 798 goto add_ro; 799 else 800 goto err_size; 801 } else if (ret < 0) 802 goto err_prop; 803 } 804 805 cell.r0 = cpu_to_fdt32(part->offset); 806 cell.r1 = cpu_to_fdt32(part->size); 807 add_reg: 808 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 809 if (ret == -FDT_ERR_NOSPACE) { 810 ret = fdt_increase_size(blob, 512); 811 if (!ret) 812 goto add_reg; 813 else 814 goto err_size; 815 } else if (ret < 0) 816 goto err_prop; 817 818 add_label: 819 ret = fdt_setprop_string(blob, newoff, "label", part->name); 820 if (ret == -FDT_ERR_NOSPACE) { 821 ret = fdt_increase_size(blob, 512); 822 if (!ret) 823 goto add_label; 824 else 825 goto err_size; 826 } else if (ret < 0) 827 goto err_prop; 828 829 part_num++; 830 } 831 return 0; 832 err_size: 833 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 834 return ret; 835 err_prop: 836 printf("Can't add property: %s\n", fdt_strerror(ret)); 837 return ret; 838 } 839 840 /* 841 * Update partitions in nor/nand nodes using info from 842 * mtdparts environment variable. The nodes to update are 843 * specified by node_info structure which contains mtd device 844 * type and compatible string: E. g. the board code in 845 * ft_board_setup() could use: 846 * 847 * struct node_info nodes[] = { 848 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 849 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 850 * }; 851 * 852 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 853 */ 854 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 855 { 856 struct node_info *ni = node_info; 857 struct mtd_device *dev; 858 char *parts; 859 int i, idx; 860 int noff; 861 862 parts = getenv("mtdparts"); 863 if (!parts) 864 return; 865 866 if (mtdparts_init() != 0) 867 return; 868 869 for (i = 0; i < node_info_size; i++) { 870 idx = 0; 871 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 872 while (noff != -FDT_ERR_NOTFOUND) { 873 debug("%s: %s, mtd dev type %d\n", 874 fdt_get_name(blob, noff, 0), 875 ni[i].compat, ni[i].type); 876 dev = device_find(ni[i].type, idx++); 877 if (dev) { 878 if (fdt_node_set_part_info(blob, noff, dev)) 879 return; /* return on error */ 880 } 881 882 /* Jump to next flash node */ 883 noff = fdt_node_offset_by_compatible(blob, noff, 884 ni[i].compat); 885 } 886 } 887 } 888 #endif 889 890 void fdt_del_node_and_alias(void *blob, const char *alias) 891 { 892 int off = fdt_path_offset(blob, alias); 893 894 if (off < 0) 895 return; 896 897 fdt_del_node(blob, off); 898 899 off = fdt_path_offset(blob, "/aliases"); 900 fdt_delprop(blob, off, alias); 901 } 902 903 /* Helper to read a big number; size is in cells (not bytes) */ 904 static inline u64 of_read_number(const fdt32_t *cell, int size) 905 { 906 u64 r = 0; 907 while (size--) 908 r = (r << 32) | fdt32_to_cpu(*(cell++)); 909 return r; 910 } 911 912 #define PRu64 "%llx" 913 914 /* Max address size we deal with */ 915 #define OF_MAX_ADDR_CELLS 4 916 #define OF_BAD_ADDR ((u64)-1) 917 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 918 (ns) > 0) 919 920 /* Debug utility */ 921 #ifdef DEBUG 922 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 923 { 924 printf("%s", s); 925 while(na--) 926 printf(" %08x", *(addr++)); 927 printf("\n"); 928 } 929 #else 930 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 931 #endif 932 933 /* Callbacks for bus specific translators */ 934 struct of_bus { 935 const char *name; 936 const char *addresses; 937 void (*count_cells)(void *blob, int parentoffset, 938 int *addrc, int *sizec); 939 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 940 int na, int ns, int pna); 941 int (*translate)(fdt32_t *addr, u64 offset, int na); 942 }; 943 944 /* Default translator (generic bus) */ 945 static void of_bus_default_count_cells(void *blob, int parentoffset, 946 int *addrc, int *sizec) 947 { 948 const fdt32_t *prop; 949 950 if (addrc) { 951 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL); 952 if (prop) 953 *addrc = be32_to_cpup(prop); 954 else 955 *addrc = 2; 956 } 957 958 if (sizec) { 959 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 960 if (prop) 961 *sizec = be32_to_cpup(prop); 962 else 963 *sizec = 1; 964 } 965 } 966 967 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 968 int na, int ns, int pna) 969 { 970 u64 cp, s, da; 971 972 cp = of_read_number(range, na); 973 s = of_read_number(range + na + pna, ns); 974 da = of_read_number(addr, na); 975 976 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n", 977 cp, s, da); 978 979 if (da < cp || da >= (cp + s)) 980 return OF_BAD_ADDR; 981 return da - cp; 982 } 983 984 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 985 { 986 u64 a = of_read_number(addr, na); 987 memset(addr, 0, na * 4); 988 a += offset; 989 if (na > 1) 990 addr[na - 2] = cpu_to_fdt32(a >> 32); 991 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 992 993 return 0; 994 } 995 996 /* Array of bus specific translators */ 997 static struct of_bus of_busses[] = { 998 /* Default */ 999 { 1000 .name = "default", 1001 .addresses = "reg", 1002 .count_cells = of_bus_default_count_cells, 1003 .map = of_bus_default_map, 1004 .translate = of_bus_default_translate, 1005 }, 1006 }; 1007 1008 static int of_translate_one(void * blob, int parent, struct of_bus *bus, 1009 struct of_bus *pbus, fdt32_t *addr, 1010 int na, int ns, int pna, const char *rprop) 1011 { 1012 const fdt32_t *ranges; 1013 int rlen; 1014 int rone; 1015 u64 offset = OF_BAD_ADDR; 1016 1017 /* Normally, an absence of a "ranges" property means we are 1018 * crossing a non-translatable boundary, and thus the addresses 1019 * below the current not cannot be converted to CPU physical ones. 1020 * Unfortunately, while this is very clear in the spec, it's not 1021 * what Apple understood, and they do have things like /uni-n or 1022 * /ht nodes with no "ranges" property and a lot of perfectly 1023 * useable mapped devices below them. Thus we treat the absence of 1024 * "ranges" as equivalent to an empty "ranges" property which means 1025 * a 1:1 translation at that level. It's up to the caller not to try 1026 * to translate addresses that aren't supposed to be translated in 1027 * the first place. --BenH. 1028 */ 1029 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1030 if (ranges == NULL || rlen == 0) { 1031 offset = of_read_number(addr, na); 1032 memset(addr, 0, pna * 4); 1033 debug("OF: no ranges, 1:1 translation\n"); 1034 goto finish; 1035 } 1036 1037 debug("OF: walking ranges...\n"); 1038 1039 /* Now walk through the ranges */ 1040 rlen /= 4; 1041 rone = na + pna + ns; 1042 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1043 offset = bus->map(addr, ranges, na, ns, pna); 1044 if (offset != OF_BAD_ADDR) 1045 break; 1046 } 1047 if (offset == OF_BAD_ADDR) { 1048 debug("OF: not found !\n"); 1049 return 1; 1050 } 1051 memcpy(addr, ranges + na, 4 * pna); 1052 1053 finish: 1054 of_dump_addr("OF: parent translation for:", addr, pna); 1055 debug("OF: with offset: "PRu64"\n", offset); 1056 1057 /* Translate it into parent bus space */ 1058 return pbus->translate(addr, offset, pna); 1059 } 1060 1061 /* 1062 * Translate an address from the device-tree into a CPU physical address, 1063 * this walks up the tree and applies the various bus mappings on the 1064 * way. 1065 * 1066 * Note: We consider that crossing any level with #size-cells == 0 to mean 1067 * that translation is impossible (that is we are not dealing with a value 1068 * that can be mapped to a cpu physical address). This is not really specified 1069 * that way, but this is traditionally the way IBM at least do things 1070 */ 1071 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr, 1072 const char *rprop) 1073 { 1074 int parent; 1075 struct of_bus *bus, *pbus; 1076 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1077 int na, ns, pna, pns; 1078 u64 result = OF_BAD_ADDR; 1079 1080 debug("OF: ** translation for device %s **\n", 1081 fdt_get_name(blob, node_offset, NULL)); 1082 1083 /* Get parent & match bus type */ 1084 parent = fdt_parent_offset(blob, node_offset); 1085 if (parent < 0) 1086 goto bail; 1087 bus = &of_busses[0]; 1088 1089 /* Cound address cells & copy address locally */ 1090 bus->count_cells(blob, parent, &na, &ns); 1091 if (!OF_CHECK_COUNTS(na, ns)) { 1092 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1093 fdt_get_name(blob, node_offset, NULL)); 1094 goto bail; 1095 } 1096 memcpy(addr, in_addr, na * 4); 1097 1098 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1099 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1100 of_dump_addr("OF: translating address:", addr, na); 1101 1102 /* Translate */ 1103 for (;;) { 1104 /* Switch to parent bus */ 1105 node_offset = parent; 1106 parent = fdt_parent_offset(blob, node_offset); 1107 1108 /* If root, we have finished */ 1109 if (parent < 0) { 1110 debug("OF: reached root node\n"); 1111 result = of_read_number(addr, na); 1112 break; 1113 } 1114 1115 /* Get new parent bus and counts */ 1116 pbus = &of_busses[0]; 1117 pbus->count_cells(blob, parent, &pna, &pns); 1118 if (!OF_CHECK_COUNTS(pna, pns)) { 1119 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1120 fdt_get_name(blob, node_offset, NULL)); 1121 break; 1122 } 1123 1124 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1125 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1126 1127 /* Apply bus translation */ 1128 if (of_translate_one(blob, node_offset, bus, pbus, 1129 addr, na, ns, pna, rprop)) 1130 break; 1131 1132 /* Complete the move up one level */ 1133 na = pna; 1134 ns = pns; 1135 bus = pbus; 1136 1137 of_dump_addr("OF: one level translation:", addr, na); 1138 } 1139 bail: 1140 1141 return result; 1142 } 1143 1144 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr) 1145 { 1146 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1147 } 1148 1149 /** 1150 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1151 * who's reg property matches a physical cpu address 1152 * 1153 * @blob: ptr to device tree 1154 * @compat: compatiable string to match 1155 * @compat_off: property name 1156 * 1157 */ 1158 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1159 phys_addr_t compat_off) 1160 { 1161 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1162 while (off != -FDT_ERR_NOTFOUND) { 1163 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1164 if (reg) { 1165 if (compat_off == fdt_translate_address(blob, off, reg)) 1166 return off; 1167 } 1168 off = fdt_node_offset_by_compatible(blob, off, compat); 1169 } 1170 1171 return -FDT_ERR_NOTFOUND; 1172 } 1173 1174 /** 1175 * fdt_alloc_phandle: Return next free phandle value 1176 * 1177 * @blob: ptr to device tree 1178 */ 1179 int fdt_alloc_phandle(void *blob) 1180 { 1181 int offset, phandle = 0; 1182 1183 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1184 offset = fdt_next_node(blob, offset, NULL)) { 1185 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1186 } 1187 1188 return phandle + 1; 1189 } 1190 1191 /* 1192 * fdt_set_phandle: Create a phandle property for the given node 1193 * 1194 * @fdt: ptr to device tree 1195 * @nodeoffset: node to update 1196 * @phandle: phandle value to set (must be unique) 1197 */ 1198 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1199 { 1200 int ret; 1201 1202 #ifdef DEBUG 1203 int off = fdt_node_offset_by_phandle(fdt, phandle); 1204 1205 if ((off >= 0) && (off != nodeoffset)) { 1206 char buf[64]; 1207 1208 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1209 printf("Trying to update node %s with phandle %u ", 1210 buf, phandle); 1211 1212 fdt_get_path(fdt, off, buf, sizeof(buf)); 1213 printf("that already exists in node %s.\n", buf); 1214 return -FDT_ERR_BADPHANDLE; 1215 } 1216 #endif 1217 1218 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1219 if (ret < 0) 1220 return ret; 1221 1222 /* 1223 * For now, also set the deprecated "linux,phandle" property, so that we 1224 * don't break older kernels. 1225 */ 1226 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1227 1228 return ret; 1229 } 1230 1231 /* 1232 * fdt_create_phandle: Create a phandle property for the given node 1233 * 1234 * @fdt: ptr to device tree 1235 * @nodeoffset: node to update 1236 */ 1237 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1238 { 1239 /* see if there is a phandle already */ 1240 int phandle = fdt_get_phandle(fdt, nodeoffset); 1241 1242 /* if we got 0, means no phandle so create one */ 1243 if (phandle == 0) { 1244 int ret; 1245 1246 phandle = fdt_alloc_phandle(fdt); 1247 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1248 if (ret < 0) { 1249 printf("Can't set phandle %u: %s\n", phandle, 1250 fdt_strerror(ret)); 1251 return 0; 1252 } 1253 } 1254 1255 return phandle; 1256 } 1257 1258 /* 1259 * fdt_set_node_status: Set status for the given node 1260 * 1261 * @fdt: ptr to device tree 1262 * @nodeoffset: node to update 1263 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1264 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1265 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1266 */ 1267 int fdt_set_node_status(void *fdt, int nodeoffset, 1268 enum fdt_status status, unsigned int error_code) 1269 { 1270 char buf[16]; 1271 int ret = 0; 1272 1273 if (nodeoffset < 0) 1274 return nodeoffset; 1275 1276 switch (status) { 1277 case FDT_STATUS_OKAY: 1278 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1279 break; 1280 case FDT_STATUS_DISABLED: 1281 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1282 break; 1283 case FDT_STATUS_FAIL: 1284 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1285 break; 1286 case FDT_STATUS_FAIL_ERROR_CODE: 1287 sprintf(buf, "fail-%d", error_code); 1288 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1289 break; 1290 default: 1291 printf("Invalid fdt status: %x\n", status); 1292 ret = -1; 1293 break; 1294 } 1295 1296 return ret; 1297 } 1298 1299 /* 1300 * fdt_set_status_by_alias: Set status for the given node given an alias 1301 * 1302 * @fdt: ptr to device tree 1303 * @alias: alias of node to update 1304 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1305 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1306 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1307 */ 1308 int fdt_set_status_by_alias(void *fdt, const char* alias, 1309 enum fdt_status status, unsigned int error_code) 1310 { 1311 int offset = fdt_path_offset(fdt, alias); 1312 1313 return fdt_set_node_status(fdt, offset, status, error_code); 1314 } 1315 1316 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1317 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1318 { 1319 int noff; 1320 int ret; 1321 1322 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1323 if (noff != -FDT_ERR_NOTFOUND) { 1324 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1325 add_edid: 1326 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1327 if (ret == -FDT_ERR_NOSPACE) { 1328 ret = fdt_increase_size(blob, 512); 1329 if (!ret) 1330 goto add_edid; 1331 else 1332 goto err_size; 1333 } else if (ret < 0) { 1334 printf("Can't add property: %s\n", fdt_strerror(ret)); 1335 return ret; 1336 } 1337 } 1338 return 0; 1339 err_size: 1340 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1341 return ret; 1342 } 1343 #endif 1344 1345 /* 1346 * Verify the physical address of device tree node for a given alias 1347 * 1348 * This function locates the device tree node of a given alias, and then 1349 * verifies that the physical address of that device matches the given 1350 * parameter. It displays a message if there is a mismatch. 1351 * 1352 * Returns 1 on success, 0 on failure 1353 */ 1354 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1355 { 1356 const char *path; 1357 const fdt32_t *reg; 1358 int node, len; 1359 u64 dt_addr; 1360 1361 path = fdt_getprop(fdt, anode, alias, NULL); 1362 if (!path) { 1363 /* If there's no such alias, then it's not a failure */ 1364 return 1; 1365 } 1366 1367 node = fdt_path_offset(fdt, path); 1368 if (node < 0) { 1369 printf("Warning: device tree alias '%s' points to invalid " 1370 "node %s.\n", alias, path); 1371 return 0; 1372 } 1373 1374 reg = fdt_getprop(fdt, node, "reg", &len); 1375 if (!reg) { 1376 printf("Warning: device tree node '%s' has no address.\n", 1377 path); 1378 return 0; 1379 } 1380 1381 dt_addr = fdt_translate_address(fdt, node, reg); 1382 if (addr != dt_addr) { 1383 printf("Warning: U-Boot configured device %s at address %llx,\n" 1384 " but the device tree has it address %llx.\n", 1385 alias, addr, dt_addr); 1386 return 0; 1387 } 1388 1389 return 1; 1390 } 1391 1392 /* 1393 * Returns the base address of an SOC or PCI node 1394 */ 1395 u64 fdt_get_base_address(void *fdt, int node) 1396 { 1397 int size; 1398 u32 naddr; 1399 const fdt32_t *prop; 1400 1401 prop = fdt_getprop(fdt, node, "#address-cells", &size); 1402 if (prop && size == 4) 1403 naddr = be32_to_cpup(prop); 1404 else 1405 naddr = 2; 1406 1407 prop = fdt_getprop(fdt, node, "ranges", &size); 1408 1409 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0; 1410 } 1411