1 /* 2 * (C) Copyright 2007 3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com 4 * 5 * Copyright 2010-2011 Freescale Semiconductor, Inc. 6 * 7 * See file CREDITS for list of people who contributed to this 8 * project. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation; either version 2 of 13 * the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 23 * MA 02111-1307 USA 24 */ 25 26 #include <common.h> 27 #include <stdio_dev.h> 28 #include <linux/ctype.h> 29 #include <linux/types.h> 30 #include <asm/global_data.h> 31 #include <fdt.h> 32 #include <libfdt.h> 33 #include <fdt_support.h> 34 #include <exports.h> 35 36 /* 37 * Global data (for the gd->bd) 38 */ 39 DECLARE_GLOBAL_DATA_PTR; 40 41 /** 42 * fdt_getprop_u32_default - Find a node and return it's property or a default 43 * 44 * @fdt: ptr to device tree 45 * @path: path of node 46 * @prop: property name 47 * @dflt: default value if the property isn't found 48 * 49 * Convenience function to find a node and return it's property or a 50 * default value if it doesn't exist. 51 */ 52 u32 fdt_getprop_u32_default(const void *fdt, const char *path, 53 const char *prop, const u32 dflt) 54 { 55 const u32 *val; 56 int off; 57 58 off = fdt_path_offset(fdt, path); 59 if (off < 0) 60 return dflt; 61 62 val = fdt_getprop(fdt, off, prop, NULL); 63 if (val) 64 return fdt32_to_cpu(*val); 65 else 66 return dflt; 67 } 68 69 /** 70 * fdt_find_and_setprop: Find a node and set it's property 71 * 72 * @fdt: ptr to device tree 73 * @node: path of node 74 * @prop: property name 75 * @val: ptr to new value 76 * @len: length of new property value 77 * @create: flag to create the property if it doesn't exist 78 * 79 * Convenience function to directly set a property given the path to the node. 80 */ 81 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 82 const void *val, int len, int create) 83 { 84 int nodeoff = fdt_path_offset(fdt, node); 85 86 if (nodeoff < 0) 87 return nodeoff; 88 89 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL)) 90 return 0; /* create flag not set; so exit quietly */ 91 92 return fdt_setprop(fdt, nodeoff, prop, val, len); 93 } 94 95 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 96 97 #ifdef CONFIG_CONS_INDEX 98 static void fdt_fill_multisername(char *sername, size_t maxlen) 99 { 100 const char *outname = stdio_devices[stdout]->name; 101 102 if (strcmp(outname, "serial") > 0) 103 strncpy(sername, outname, maxlen); 104 105 /* eserial? */ 106 if (strcmp(outname + 1, "serial") > 0) 107 strncpy(sername, outname + 1, maxlen); 108 } 109 #endif 110 111 static int fdt_fixup_stdout(void *fdt, int chosenoff) 112 { 113 int err = 0; 114 #ifdef CONFIG_CONS_INDEX 115 int node; 116 char sername[9] = { 0 }; 117 const char *path; 118 119 fdt_fill_multisername(sername, sizeof(sername) - 1); 120 if (!sername[0]) 121 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 122 123 err = node = fdt_path_offset(fdt, "/aliases"); 124 if (node >= 0) { 125 int len; 126 path = fdt_getprop(fdt, node, sername, &len); 127 if (path) { 128 char *p = malloc(len); 129 err = -FDT_ERR_NOSPACE; 130 if (p) { 131 memcpy(p, path, len); 132 err = fdt_setprop(fdt, chosenoff, 133 "linux,stdout-path", p, len); 134 free(p); 135 } 136 } else { 137 err = len; 138 } 139 } 140 #endif 141 if (err < 0) 142 printf("WARNING: could not set linux,stdout-path %s.\n", 143 fdt_strerror(err)); 144 145 return err; 146 } 147 #endif 148 149 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force) 150 { 151 int nodeoffset; 152 int err, j, total; 153 u32 tmp; 154 const char *path; 155 uint64_t addr, size; 156 157 /* Find the "chosen" node. */ 158 nodeoffset = fdt_path_offset (fdt, "/chosen"); 159 160 /* If there is no "chosen" node in the blob return */ 161 if (nodeoffset < 0) { 162 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset)); 163 return nodeoffset; 164 } 165 166 /* just return if initrd_start/end aren't valid */ 167 if ((initrd_start == 0) || (initrd_end == 0)) 168 return 0; 169 170 total = fdt_num_mem_rsv(fdt); 171 172 /* 173 * Look for an existing entry and update it. If we don't find 174 * the entry, we will j be the next available slot. 175 */ 176 for (j = 0; j < total; j++) { 177 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 178 if (addr == initrd_start) { 179 fdt_del_mem_rsv(fdt, j); 180 break; 181 } 182 } 183 184 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 185 if (err < 0) { 186 printf("fdt_initrd: %s\n", fdt_strerror(err)); 187 return err; 188 } 189 190 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL); 191 if ((path == NULL) || force) { 192 tmp = __cpu_to_be32(initrd_start); 193 err = fdt_setprop(fdt, nodeoffset, 194 "linux,initrd-start", &tmp, sizeof(tmp)); 195 if (err < 0) { 196 printf("WARNING: " 197 "could not set linux,initrd-start %s.\n", 198 fdt_strerror(err)); 199 return err; 200 } 201 tmp = __cpu_to_be32(initrd_end); 202 err = fdt_setprop(fdt, nodeoffset, 203 "linux,initrd-end", &tmp, sizeof(tmp)); 204 if (err < 0) { 205 printf("WARNING: could not set linux,initrd-end %s.\n", 206 fdt_strerror(err)); 207 208 return err; 209 } 210 } 211 212 return 0; 213 } 214 215 int fdt_chosen(void *fdt, int force) 216 { 217 int nodeoffset; 218 int err; 219 char *str; /* used to set string properties */ 220 const char *path; 221 222 err = fdt_check_header(fdt); 223 if (err < 0) { 224 printf("fdt_chosen: %s\n", fdt_strerror(err)); 225 return err; 226 } 227 228 /* 229 * Find the "chosen" node. 230 */ 231 nodeoffset = fdt_path_offset (fdt, "/chosen"); 232 233 /* 234 * If there is no "chosen" node in the blob, create it. 235 */ 236 if (nodeoffset < 0) { 237 /* 238 * Create a new node "/chosen" (offset 0 is root level) 239 */ 240 nodeoffset = fdt_add_subnode(fdt, 0, "chosen"); 241 if (nodeoffset < 0) { 242 printf("WARNING: could not create /chosen %s.\n", 243 fdt_strerror(nodeoffset)); 244 return nodeoffset; 245 } 246 } 247 248 /* 249 * Create /chosen properites that don't exist in the fdt. 250 * If the property exists, update it only if the "force" parameter 251 * is true. 252 */ 253 str = getenv("bootargs"); 254 if (str != NULL) { 255 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL); 256 if ((path == NULL) || force) { 257 err = fdt_setprop(fdt, nodeoffset, 258 "bootargs", str, strlen(str)+1); 259 if (err < 0) 260 printf("WARNING: could not set bootargs %s.\n", 261 fdt_strerror(err)); 262 } 263 } 264 265 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 266 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 267 if ((path == NULL) || force) 268 err = fdt_fixup_stdout(fdt, nodeoffset); 269 #endif 270 271 #ifdef OF_STDOUT_PATH 272 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 273 if ((path == NULL) || force) { 274 err = fdt_setprop(fdt, nodeoffset, 275 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1); 276 if (err < 0) 277 printf("WARNING: could not set linux,stdout-path %s.\n", 278 fdt_strerror(err)); 279 } 280 #endif 281 282 return err; 283 } 284 285 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 286 const void *val, int len, int create) 287 { 288 #if defined(DEBUG) 289 int i; 290 debug("Updating property '%s/%s' = ", path, prop); 291 for (i = 0; i < len; i++) 292 debug(" %.2x", *(u8*)(val+i)); 293 debug("\n"); 294 #endif 295 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 296 if (rc) 297 printf("Unable to update property %s:%s, err=%s\n", 298 path, prop, fdt_strerror(rc)); 299 } 300 301 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 302 u32 val, int create) 303 { 304 val = cpu_to_fdt32(val); 305 do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create); 306 } 307 308 void do_fixup_by_prop(void *fdt, 309 const char *pname, const void *pval, int plen, 310 const char *prop, const void *val, int len, 311 int create) 312 { 313 int off; 314 #if defined(DEBUG) 315 int i; 316 debug("Updating property '%s' = ", prop); 317 for (i = 0; i < len; i++) 318 debug(" %.2x", *(u8*)(val+i)); 319 debug("\n"); 320 #endif 321 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 322 while (off != -FDT_ERR_NOTFOUND) { 323 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL)) 324 fdt_setprop(fdt, off, prop, val, len); 325 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 326 } 327 } 328 329 void do_fixup_by_prop_u32(void *fdt, 330 const char *pname, const void *pval, int plen, 331 const char *prop, u32 val, int create) 332 { 333 val = cpu_to_fdt32(val); 334 do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create); 335 } 336 337 void do_fixup_by_compat(void *fdt, const char *compat, 338 const char *prop, const void *val, int len, int create) 339 { 340 int off = -1; 341 #if defined(DEBUG) 342 int i; 343 debug("Updating property '%s' = ", prop); 344 for (i = 0; i < len; i++) 345 debug(" %.2x", *(u8*)(val+i)); 346 debug("\n"); 347 #endif 348 off = fdt_node_offset_by_compatible(fdt, -1, compat); 349 while (off != -FDT_ERR_NOTFOUND) { 350 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL)) 351 fdt_setprop(fdt, off, prop, val, len); 352 off = fdt_node_offset_by_compatible(fdt, off, compat); 353 } 354 } 355 356 void do_fixup_by_compat_u32(void *fdt, const char *compat, 357 const char *prop, u32 val, int create) 358 { 359 val = cpu_to_fdt32(val); 360 do_fixup_by_compat(fdt, compat, prop, &val, 4, create); 361 } 362 363 /* 364 * Get cells len in bytes 365 * if #NNNN-cells property is 2 then len is 8 366 * otherwise len is 4 367 */ 368 static int get_cells_len(void *blob, char *nr_cells_name) 369 { 370 const u32 *cell; 371 372 cell = fdt_getprop(blob, 0, nr_cells_name, NULL); 373 if (cell && fdt32_to_cpu(*cell) == 2) 374 return 8; 375 376 return 4; 377 } 378 379 /* 380 * Write a 4 or 8 byte big endian cell 381 */ 382 static void write_cell(u8 *addr, u64 val, int size) 383 { 384 int shift = (size - 1) * 8; 385 while (size-- > 0) { 386 *addr++ = (val >> shift) & 0xff; 387 shift -= 8; 388 } 389 } 390 391 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 392 { 393 int err, nodeoffset; 394 int addr_cell_len, size_cell_len, len; 395 u8 tmp[banks * 16]; /* Up to 64-bit address + 64-bit size */ 396 int bank; 397 398 err = fdt_check_header(blob); 399 if (err < 0) { 400 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 401 return err; 402 } 403 404 /* update, or add and update /memory node */ 405 nodeoffset = fdt_path_offset(blob, "/memory"); 406 if (nodeoffset < 0) { 407 nodeoffset = fdt_add_subnode(blob, 0, "memory"); 408 if (nodeoffset < 0) 409 printf("WARNING: could not create /memory: %s.\n", 410 fdt_strerror(nodeoffset)); 411 return nodeoffset; 412 } 413 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 414 sizeof("memory")); 415 if (err < 0) { 416 printf("WARNING: could not set %s %s.\n", "device_type", 417 fdt_strerror(err)); 418 return err; 419 } 420 421 addr_cell_len = get_cells_len(blob, "#address-cells"); 422 size_cell_len = get_cells_len(blob, "#size-cells"); 423 424 for (bank = 0, len = 0; bank < banks; bank++) { 425 write_cell(tmp + len, start[bank], addr_cell_len); 426 len += addr_cell_len; 427 428 write_cell(tmp + len, size[bank], size_cell_len); 429 len += size_cell_len; 430 } 431 432 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 433 if (err < 0) { 434 printf("WARNING: could not set %s %s.\n", 435 "reg", fdt_strerror(err)); 436 return err; 437 } 438 return 0; 439 } 440 441 int fdt_fixup_memory(void *blob, u64 start, u64 size) 442 { 443 return fdt_fixup_memory_banks(blob, &start, &size, 1); 444 } 445 446 void fdt_fixup_ethernet(void *fdt) 447 { 448 int node, i, j; 449 char enet[16], *tmp, *end; 450 char mac[16] = "ethaddr"; 451 const char *path; 452 unsigned char mac_addr[6]; 453 454 node = fdt_path_offset(fdt, "/aliases"); 455 if (node < 0) 456 return; 457 458 i = 0; 459 while ((tmp = getenv(mac)) != NULL) { 460 sprintf(enet, "ethernet%d", i); 461 path = fdt_getprop(fdt, node, enet, NULL); 462 if (!path) { 463 debug("No alias for %s\n", enet); 464 sprintf(mac, "eth%daddr", ++i); 465 continue; 466 } 467 468 for (j = 0; j < 6; j++) { 469 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0; 470 if (tmp) 471 tmp = (*end) ? end+1 : end; 472 } 473 474 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0); 475 do_fixup_by_path(fdt, path, "local-mac-address", 476 &mac_addr, 6, 1); 477 478 sprintf(mac, "eth%daddr", ++i); 479 } 480 } 481 482 /* Resize the fdt to its actual size + a bit of padding */ 483 int fdt_resize(void *blob) 484 { 485 int i; 486 uint64_t addr, size; 487 int total, ret; 488 uint actualsize; 489 490 if (!blob) 491 return 0; 492 493 total = fdt_num_mem_rsv(blob); 494 for (i = 0; i < total; i++) { 495 fdt_get_mem_rsv(blob, i, &addr, &size); 496 if (addr == (uintptr_t)blob) { 497 fdt_del_mem_rsv(blob, i); 498 break; 499 } 500 } 501 502 /* 503 * Calculate the actual size of the fdt 504 * plus the size needed for 5 fdt_add_mem_rsv, one 505 * for the fdt itself and 4 for a possible initrd 506 * ((initrd-start + initrd-end) * 2 (name & value)) 507 */ 508 actualsize = fdt_off_dt_strings(blob) + 509 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 510 511 /* Make it so the fdt ends on a page boundary */ 512 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 513 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 514 515 /* Change the fdt header to reflect the correct size */ 516 fdt_set_totalsize(blob, actualsize); 517 518 /* Add the new reservation */ 519 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 520 if (ret < 0) 521 return ret; 522 523 return actualsize; 524 } 525 526 #ifdef CONFIG_PCI 527 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 528 529 #define FDT_PCI_PREFETCH (0x40000000) 530 #define FDT_PCI_MEM32 (0x02000000) 531 #define FDT_PCI_IO (0x01000000) 532 #define FDT_PCI_MEM64 (0x03000000) 533 534 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 535 536 int addrcell, sizecell, len, r; 537 u32 *dma_range; 538 /* sized based on pci addr cells, size-cells, & address-cells */ 539 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 540 541 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 542 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 543 544 dma_range = &dma_ranges[0]; 545 for (r = 0; r < hose->region_count; r++) { 546 u64 bus_start, phys_start, size; 547 548 /* skip if !PCI_REGION_SYS_MEMORY */ 549 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 550 continue; 551 552 bus_start = (u64)hose->regions[r].bus_start; 553 phys_start = (u64)hose->regions[r].phys_start; 554 size = (u64)hose->regions[r].size; 555 556 dma_range[0] = 0; 557 if (size >= 0x100000000ull) 558 dma_range[0] |= FDT_PCI_MEM64; 559 else 560 dma_range[0] |= FDT_PCI_MEM32; 561 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 562 dma_range[0] |= FDT_PCI_PREFETCH; 563 #ifdef CONFIG_SYS_PCI_64BIT 564 dma_range[1] = bus_start >> 32; 565 #else 566 dma_range[1] = 0; 567 #endif 568 dma_range[2] = bus_start & 0xffffffff; 569 570 if (addrcell == 2) { 571 dma_range[3] = phys_start >> 32; 572 dma_range[4] = phys_start & 0xffffffff; 573 } else { 574 dma_range[3] = phys_start & 0xffffffff; 575 } 576 577 if (sizecell == 2) { 578 dma_range[3 + addrcell + 0] = size >> 32; 579 dma_range[3 + addrcell + 1] = size & 0xffffffff; 580 } else { 581 dma_range[3 + addrcell + 0] = size & 0xffffffff; 582 } 583 584 dma_range += (3 + addrcell + sizecell); 585 } 586 587 len = dma_range - &dma_ranges[0]; 588 if (len) 589 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 590 591 return 0; 592 } 593 #endif 594 595 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE 596 /* 597 * Provide a weak default function to return the flash bank size. 598 * There might be multiple non-identical flash chips connected to one 599 * chip-select, so we need to pass an index as well. 600 */ 601 u32 __flash_get_bank_size(int cs, int idx) 602 { 603 extern flash_info_t flash_info[]; 604 605 /* 606 * As default, a simple 1:1 mapping is provided. Boards with 607 * a different mapping need to supply a board specific mapping 608 * routine. 609 */ 610 return flash_info[cs].size; 611 } 612 u32 flash_get_bank_size(int cs, int idx) 613 __attribute__((weak, alias("__flash_get_bank_size"))); 614 615 /* 616 * This function can be used to update the size in the "reg" property 617 * of all NOR FLASH device nodes. This is necessary for boards with 618 * non-fixed NOR FLASH sizes. 619 */ 620 int fdt_fixup_nor_flash_size(void *blob) 621 { 622 char compat[][16] = { "cfi-flash", "jedec-flash" }; 623 int off; 624 int len; 625 struct fdt_property *prop; 626 u32 *reg, *reg2; 627 int i; 628 629 for (i = 0; i < 2; i++) { 630 off = fdt_node_offset_by_compatible(blob, -1, compat[i]); 631 while (off != -FDT_ERR_NOTFOUND) { 632 int idx; 633 634 /* 635 * Found one compatible node, so fixup the size 636 * int its reg properties 637 */ 638 prop = fdt_get_property_w(blob, off, "reg", &len); 639 if (prop) { 640 int tuple_size = 3 * sizeof(reg); 641 642 /* 643 * There might be multiple reg-tuples, 644 * so loop through them all 645 */ 646 reg = reg2 = (u32 *)&prop->data[0]; 647 for (idx = 0; idx < (len / tuple_size); idx++) { 648 /* 649 * Update size in reg property 650 */ 651 reg[2] = flash_get_bank_size(reg[0], 652 idx); 653 654 /* 655 * Point to next reg tuple 656 */ 657 reg += 3; 658 } 659 660 fdt_setprop(blob, off, "reg", reg2, len); 661 } 662 663 /* Move to next compatible node */ 664 off = fdt_node_offset_by_compatible(blob, off, 665 compat[i]); 666 } 667 } 668 669 return 0; 670 } 671 #endif 672 673 int fdt_increase_size(void *fdt, int add_len) 674 { 675 int newlen; 676 677 newlen = fdt_totalsize(fdt) + add_len; 678 679 /* Open in place with a new len */ 680 return fdt_open_into(fdt, fdt, newlen); 681 } 682 683 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 684 #include <jffs2/load_kernel.h> 685 #include <mtd_node.h> 686 687 struct reg_cell { 688 unsigned int r0; 689 unsigned int r1; 690 }; 691 692 int fdt_del_subnodes(const void *blob, int parent_offset) 693 { 694 int off, ndepth; 695 int ret; 696 697 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 698 (off >= 0) && (ndepth > 0); 699 off = fdt_next_node(blob, off, &ndepth)) { 700 if (ndepth == 1) { 701 debug("delete %s: offset: %x\n", 702 fdt_get_name(blob, off, 0), off); 703 ret = fdt_del_node((void *)blob, off); 704 if (ret < 0) { 705 printf("Can't delete node: %s\n", 706 fdt_strerror(ret)); 707 return ret; 708 } else { 709 ndepth = 0; 710 off = parent_offset; 711 } 712 } 713 } 714 return 0; 715 } 716 717 int fdt_del_partitions(void *blob, int parent_offset) 718 { 719 const void *prop; 720 int ndepth = 0; 721 int off; 722 int ret; 723 724 off = fdt_next_node(blob, parent_offset, &ndepth); 725 if (off > 0 && ndepth == 1) { 726 prop = fdt_getprop(blob, off, "label", NULL); 727 if (prop == NULL) { 728 /* 729 * Could not find label property, nand {}; node? 730 * Check subnode, delete partitions there if any. 731 */ 732 return fdt_del_partitions(blob, off); 733 } else { 734 ret = fdt_del_subnodes(blob, parent_offset); 735 if (ret < 0) { 736 printf("Can't remove subnodes: %s\n", 737 fdt_strerror(ret)); 738 return ret; 739 } 740 } 741 } 742 return 0; 743 } 744 745 int fdt_node_set_part_info(void *blob, int parent_offset, 746 struct mtd_device *dev) 747 { 748 struct list_head *pentry; 749 struct part_info *part; 750 struct reg_cell cell; 751 int off, ndepth = 0; 752 int part_num, ret; 753 char buf[64]; 754 755 ret = fdt_del_partitions(blob, parent_offset); 756 if (ret < 0) 757 return ret; 758 759 /* 760 * Check if it is nand {}; subnode, adjust 761 * the offset in this case 762 */ 763 off = fdt_next_node(blob, parent_offset, &ndepth); 764 if (off > 0 && ndepth == 1) 765 parent_offset = off; 766 767 part_num = 0; 768 list_for_each_prev(pentry, &dev->parts) { 769 int newoff; 770 771 part = list_entry(pentry, struct part_info, link); 772 773 debug("%2d: %-20s0x%08x\t0x%08x\t%d\n", 774 part_num, part->name, part->size, 775 part->offset, part->mask_flags); 776 777 sprintf(buf, "partition@%x", part->offset); 778 add_sub: 779 ret = fdt_add_subnode(blob, parent_offset, buf); 780 if (ret == -FDT_ERR_NOSPACE) { 781 ret = fdt_increase_size(blob, 512); 782 if (!ret) 783 goto add_sub; 784 else 785 goto err_size; 786 } else if (ret < 0) { 787 printf("Can't add partition node: %s\n", 788 fdt_strerror(ret)); 789 return ret; 790 } 791 newoff = ret; 792 793 /* Check MTD_WRITEABLE_CMD flag */ 794 if (part->mask_flags & 1) { 795 add_ro: 796 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 797 if (ret == -FDT_ERR_NOSPACE) { 798 ret = fdt_increase_size(blob, 512); 799 if (!ret) 800 goto add_ro; 801 else 802 goto err_size; 803 } else if (ret < 0) 804 goto err_prop; 805 } 806 807 cell.r0 = cpu_to_fdt32(part->offset); 808 cell.r1 = cpu_to_fdt32(part->size); 809 add_reg: 810 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 811 if (ret == -FDT_ERR_NOSPACE) { 812 ret = fdt_increase_size(blob, 512); 813 if (!ret) 814 goto add_reg; 815 else 816 goto err_size; 817 } else if (ret < 0) 818 goto err_prop; 819 820 add_label: 821 ret = fdt_setprop_string(blob, newoff, "label", part->name); 822 if (ret == -FDT_ERR_NOSPACE) { 823 ret = fdt_increase_size(blob, 512); 824 if (!ret) 825 goto add_label; 826 else 827 goto err_size; 828 } else if (ret < 0) 829 goto err_prop; 830 831 part_num++; 832 } 833 return 0; 834 err_size: 835 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 836 return ret; 837 err_prop: 838 printf("Can't add property: %s\n", fdt_strerror(ret)); 839 return ret; 840 } 841 842 /* 843 * Update partitions in nor/nand nodes using info from 844 * mtdparts environment variable. The nodes to update are 845 * specified by node_info structure which contains mtd device 846 * type and compatible string: E. g. the board code in 847 * ft_board_setup() could use: 848 * 849 * struct node_info nodes[] = { 850 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 851 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 852 * }; 853 * 854 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 855 */ 856 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 857 { 858 struct node_info *ni = node_info; 859 struct mtd_device *dev; 860 char *parts; 861 int i, idx; 862 int noff; 863 864 parts = getenv("mtdparts"); 865 if (!parts) 866 return; 867 868 if (mtdparts_init() != 0) 869 return; 870 871 for (i = 0; i < node_info_size; i++) { 872 idx = 0; 873 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 874 while (noff != -FDT_ERR_NOTFOUND) { 875 debug("%s: %s, mtd dev type %d\n", 876 fdt_get_name(blob, noff, 0), 877 ni[i].compat, ni[i].type); 878 dev = device_find(ni[i].type, idx++); 879 if (dev) { 880 if (fdt_node_set_part_info(blob, noff, dev)) 881 return; /* return on error */ 882 } 883 884 /* Jump to next flash node */ 885 noff = fdt_node_offset_by_compatible(blob, noff, 886 ni[i].compat); 887 } 888 } 889 } 890 #endif 891 892 void fdt_del_node_and_alias(void *blob, const char *alias) 893 { 894 int off = fdt_path_offset(blob, alias); 895 896 if (off < 0) 897 return; 898 899 fdt_del_node(blob, off); 900 901 off = fdt_path_offset(blob, "/aliases"); 902 fdt_delprop(blob, off, alias); 903 } 904 905 /* Helper to read a big number; size is in cells (not bytes) */ 906 static inline u64 of_read_number(const __be32 *cell, int size) 907 { 908 u64 r = 0; 909 while (size--) 910 r = (r << 32) | be32_to_cpu(*(cell++)); 911 return r; 912 } 913 914 #define PRu64 "%llx" 915 916 /* Max address size we deal with */ 917 #define OF_MAX_ADDR_CELLS 4 918 #define OF_BAD_ADDR ((u64)-1) 919 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 920 (ns) > 0) 921 922 /* Debug utility */ 923 #ifdef DEBUG 924 static void of_dump_addr(const char *s, const u32 *addr, int na) 925 { 926 printf("%s", s); 927 while(na--) 928 printf(" %08x", *(addr++)); 929 printf("\n"); 930 } 931 #else 932 static void of_dump_addr(const char *s, const u32 *addr, int na) { } 933 #endif 934 935 /* Callbacks for bus specific translators */ 936 struct of_bus { 937 const char *name; 938 const char *addresses; 939 void (*count_cells)(void *blob, int parentoffset, 940 int *addrc, int *sizec); 941 u64 (*map)(u32 *addr, const u32 *range, 942 int na, int ns, int pna); 943 int (*translate)(u32 *addr, u64 offset, int na); 944 }; 945 946 /* Default translator (generic bus) */ 947 static void of_bus_default_count_cells(void *blob, int parentoffset, 948 int *addrc, int *sizec) 949 { 950 const u32 *prop; 951 952 if (addrc) { 953 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL); 954 if (prop) 955 *addrc = be32_to_cpup((u32 *)prop); 956 else 957 *addrc = 2; 958 } 959 960 if (sizec) { 961 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 962 if (prop) 963 *sizec = be32_to_cpup((u32 *)prop); 964 else 965 *sizec = 1; 966 } 967 } 968 969 static u64 of_bus_default_map(u32 *addr, const u32 *range, 970 int na, int ns, int pna) 971 { 972 u64 cp, s, da; 973 974 cp = of_read_number(range, na); 975 s = of_read_number(range + na + pna, ns); 976 da = of_read_number(addr, na); 977 978 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n", 979 cp, s, da); 980 981 if (da < cp || da >= (cp + s)) 982 return OF_BAD_ADDR; 983 return da - cp; 984 } 985 986 static int of_bus_default_translate(u32 *addr, u64 offset, int na) 987 { 988 u64 a = of_read_number(addr, na); 989 memset(addr, 0, na * 4); 990 a += offset; 991 if (na > 1) 992 addr[na - 2] = a >> 32; 993 addr[na - 1] = a & 0xffffffffu; 994 995 return 0; 996 } 997 998 /* Array of bus specific translators */ 999 static struct of_bus of_busses[] = { 1000 /* Default */ 1001 { 1002 .name = "default", 1003 .addresses = "reg", 1004 .count_cells = of_bus_default_count_cells, 1005 .map = of_bus_default_map, 1006 .translate = of_bus_default_translate, 1007 }, 1008 }; 1009 1010 static int of_translate_one(void * blob, int parent, struct of_bus *bus, 1011 struct of_bus *pbus, u32 *addr, 1012 int na, int ns, int pna, const char *rprop) 1013 { 1014 const u32 *ranges; 1015 int rlen; 1016 int rone; 1017 u64 offset = OF_BAD_ADDR; 1018 1019 /* Normally, an absence of a "ranges" property means we are 1020 * crossing a non-translatable boundary, and thus the addresses 1021 * below the current not cannot be converted to CPU physical ones. 1022 * Unfortunately, while this is very clear in the spec, it's not 1023 * what Apple understood, and they do have things like /uni-n or 1024 * /ht nodes with no "ranges" property and a lot of perfectly 1025 * useable mapped devices below them. Thus we treat the absence of 1026 * "ranges" as equivalent to an empty "ranges" property which means 1027 * a 1:1 translation at that level. It's up to the caller not to try 1028 * to translate addresses that aren't supposed to be translated in 1029 * the first place. --BenH. 1030 */ 1031 ranges = (u32 *)fdt_getprop(blob, parent, rprop, &rlen); 1032 if (ranges == NULL || rlen == 0) { 1033 offset = of_read_number(addr, na); 1034 memset(addr, 0, pna * 4); 1035 debug("OF: no ranges, 1:1 translation\n"); 1036 goto finish; 1037 } 1038 1039 debug("OF: walking ranges...\n"); 1040 1041 /* Now walk through the ranges */ 1042 rlen /= 4; 1043 rone = na + pna + ns; 1044 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1045 offset = bus->map(addr, ranges, na, ns, pna); 1046 if (offset != OF_BAD_ADDR) 1047 break; 1048 } 1049 if (offset == OF_BAD_ADDR) { 1050 debug("OF: not found !\n"); 1051 return 1; 1052 } 1053 memcpy(addr, ranges + na, 4 * pna); 1054 1055 finish: 1056 of_dump_addr("OF: parent translation for:", addr, pna); 1057 debug("OF: with offset: "PRu64"\n", offset); 1058 1059 /* Translate it into parent bus space */ 1060 return pbus->translate(addr, offset, pna); 1061 } 1062 1063 /* 1064 * Translate an address from the device-tree into a CPU physical address, 1065 * this walks up the tree and applies the various bus mappings on the 1066 * way. 1067 * 1068 * Note: We consider that crossing any level with #size-cells == 0 to mean 1069 * that translation is impossible (that is we are not dealing with a value 1070 * that can be mapped to a cpu physical address). This is not really specified 1071 * that way, but this is traditionally the way IBM at least do things 1072 */ 1073 u64 __of_translate_address(void *blob, int node_offset, const u32 *in_addr, 1074 const char *rprop) 1075 { 1076 int parent; 1077 struct of_bus *bus, *pbus; 1078 u32 addr[OF_MAX_ADDR_CELLS]; 1079 int na, ns, pna, pns; 1080 u64 result = OF_BAD_ADDR; 1081 1082 debug("OF: ** translation for device %s **\n", 1083 fdt_get_name(blob, node_offset, NULL)); 1084 1085 /* Get parent & match bus type */ 1086 parent = fdt_parent_offset(blob, node_offset); 1087 if (parent < 0) 1088 goto bail; 1089 bus = &of_busses[0]; 1090 1091 /* Cound address cells & copy address locally */ 1092 bus->count_cells(blob, parent, &na, &ns); 1093 if (!OF_CHECK_COUNTS(na, ns)) { 1094 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1095 fdt_get_name(blob, node_offset, NULL)); 1096 goto bail; 1097 } 1098 memcpy(addr, in_addr, na * 4); 1099 1100 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1101 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1102 of_dump_addr("OF: translating address:", addr, na); 1103 1104 /* Translate */ 1105 for (;;) { 1106 /* Switch to parent bus */ 1107 node_offset = parent; 1108 parent = fdt_parent_offset(blob, node_offset); 1109 1110 /* If root, we have finished */ 1111 if (parent < 0) { 1112 debug("OF: reached root node\n"); 1113 result = of_read_number(addr, na); 1114 break; 1115 } 1116 1117 /* Get new parent bus and counts */ 1118 pbus = &of_busses[0]; 1119 pbus->count_cells(blob, parent, &pna, &pns); 1120 if (!OF_CHECK_COUNTS(pna, pns)) { 1121 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1122 fdt_get_name(blob, node_offset, NULL)); 1123 break; 1124 } 1125 1126 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1127 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1128 1129 /* Apply bus translation */ 1130 if (of_translate_one(blob, node_offset, bus, pbus, 1131 addr, na, ns, pna, rprop)) 1132 break; 1133 1134 /* Complete the move up one level */ 1135 na = pna; 1136 ns = pns; 1137 bus = pbus; 1138 1139 of_dump_addr("OF: one level translation:", addr, na); 1140 } 1141 bail: 1142 1143 return result; 1144 } 1145 1146 u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr) 1147 { 1148 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1149 } 1150 1151 /** 1152 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1153 * who's reg property matches a physical cpu address 1154 * 1155 * @blob: ptr to device tree 1156 * @compat: compatiable string to match 1157 * @compat_off: property name 1158 * 1159 */ 1160 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1161 phys_addr_t compat_off) 1162 { 1163 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1164 while (off != -FDT_ERR_NOTFOUND) { 1165 u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", &len); 1166 if (reg) { 1167 if (compat_off == fdt_translate_address(blob, off, reg)) 1168 return off; 1169 } 1170 off = fdt_node_offset_by_compatible(blob, off, compat); 1171 } 1172 1173 return -FDT_ERR_NOTFOUND; 1174 } 1175 1176 /** 1177 * fdt_alloc_phandle: Return next free phandle value 1178 * 1179 * @blob: ptr to device tree 1180 */ 1181 int fdt_alloc_phandle(void *blob) 1182 { 1183 int offset, phandle = 0; 1184 1185 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1186 offset = fdt_next_node(blob, offset, NULL)) { 1187 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1188 } 1189 1190 return phandle + 1; 1191 } 1192 1193 /* 1194 * fdt_set_phandle: Create a phandle property for the given node 1195 * 1196 * @fdt: ptr to device tree 1197 * @nodeoffset: node to update 1198 * @phandle: phandle value to set (must be unique) 1199 */ 1200 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1201 { 1202 int ret; 1203 1204 #ifdef DEBUG 1205 int off = fdt_node_offset_by_phandle(fdt, phandle); 1206 1207 if ((off >= 0) && (off != nodeoffset)) { 1208 char buf[64]; 1209 1210 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1211 printf("Trying to update node %s with phandle %u ", 1212 buf, phandle); 1213 1214 fdt_get_path(fdt, off, buf, sizeof(buf)); 1215 printf("that already exists in node %s.\n", buf); 1216 return -FDT_ERR_BADPHANDLE; 1217 } 1218 #endif 1219 1220 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1221 if (ret < 0) 1222 return ret; 1223 1224 /* 1225 * For now, also set the deprecated "linux,phandle" property, so that we 1226 * don't break older kernels. 1227 */ 1228 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1229 1230 return ret; 1231 } 1232 1233 /* 1234 * fdt_create_phandle: Create a phandle property for the given node 1235 * 1236 * @fdt: ptr to device tree 1237 * @nodeoffset: node to update 1238 */ 1239 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1240 { 1241 /* see if there is a phandle already */ 1242 int phandle = fdt_get_phandle(fdt, nodeoffset); 1243 1244 /* if we got 0, means no phandle so create one */ 1245 if (phandle == 0) { 1246 int ret; 1247 1248 phandle = fdt_alloc_phandle(fdt); 1249 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1250 if (ret < 0) { 1251 printf("Can't set phandle %u: %s\n", phandle, 1252 fdt_strerror(ret)); 1253 return 0; 1254 } 1255 } 1256 1257 return phandle; 1258 } 1259 1260 /* 1261 * fdt_set_node_status: Set status for the given node 1262 * 1263 * @fdt: ptr to device tree 1264 * @nodeoffset: node to update 1265 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1266 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1267 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1268 */ 1269 int fdt_set_node_status(void *fdt, int nodeoffset, 1270 enum fdt_status status, unsigned int error_code) 1271 { 1272 char buf[16]; 1273 int ret = 0; 1274 1275 if (nodeoffset < 0) 1276 return nodeoffset; 1277 1278 switch (status) { 1279 case FDT_STATUS_OKAY: 1280 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1281 break; 1282 case FDT_STATUS_DISABLED: 1283 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1284 break; 1285 case FDT_STATUS_FAIL: 1286 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1287 break; 1288 case FDT_STATUS_FAIL_ERROR_CODE: 1289 sprintf(buf, "fail-%d", error_code); 1290 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1291 break; 1292 default: 1293 printf("Invalid fdt status: %x\n", status); 1294 ret = -1; 1295 break; 1296 } 1297 1298 return ret; 1299 } 1300 1301 /* 1302 * fdt_set_status_by_alias: Set status for the given node given an alias 1303 * 1304 * @fdt: ptr to device tree 1305 * @alias: alias of node to update 1306 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1307 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1308 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1309 */ 1310 int fdt_set_status_by_alias(void *fdt, const char* alias, 1311 enum fdt_status status, unsigned int error_code) 1312 { 1313 int offset = fdt_path_offset(fdt, alias); 1314 1315 return fdt_set_node_status(fdt, offset, status, error_code); 1316 } 1317 1318 #if defined(CONFIG_VIDEO) 1319 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1320 { 1321 int noff; 1322 int ret; 1323 1324 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1325 if (noff != -FDT_ERR_NOTFOUND) { 1326 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1327 add_edid: 1328 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1329 if (ret == -FDT_ERR_NOSPACE) { 1330 ret = fdt_increase_size(blob, 512); 1331 if (!ret) 1332 goto add_edid; 1333 else 1334 goto err_size; 1335 } else if (ret < 0) { 1336 printf("Can't add property: %s\n", fdt_strerror(ret)); 1337 return ret; 1338 } 1339 } 1340 return 0; 1341 err_size: 1342 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1343 return ret; 1344 } 1345 #endif 1346 1347 /* 1348 * Verify the physical address of device tree node for a given alias 1349 * 1350 * This function locates the device tree node of a given alias, and then 1351 * verifies that the physical address of that device matches the given 1352 * parameter. It displays a message if there is a mismatch. 1353 * 1354 * Returns 1 on success, 0 on failure 1355 */ 1356 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1357 { 1358 const char *path; 1359 const u32 *reg; 1360 int node, len; 1361 u64 dt_addr; 1362 1363 path = fdt_getprop(fdt, anode, alias, NULL); 1364 if (!path) { 1365 /* If there's no such alias, then it's not a failure */ 1366 return 1; 1367 } 1368 1369 node = fdt_path_offset(fdt, path); 1370 if (node < 0) { 1371 printf("Warning: device tree alias '%s' points to invalid " 1372 "node %s.\n", alias, path); 1373 return 0; 1374 } 1375 1376 reg = fdt_getprop(fdt, node, "reg", &len); 1377 if (!reg) { 1378 printf("Warning: device tree node '%s' has no address.\n", 1379 path); 1380 return 0; 1381 } 1382 1383 dt_addr = fdt_translate_address(fdt, node, reg); 1384 if (addr != dt_addr) { 1385 printf("Warning: U-Boot configured device %s at address %llx,\n" 1386 " but the device tree has it address %llx.\n", 1387 alias, addr, dt_addr); 1388 return 0; 1389 } 1390 1391 return 1; 1392 } 1393 1394 /* 1395 * Returns the base address of an SOC or PCI node 1396 */ 1397 u64 fdt_get_base_address(void *fdt, int node) 1398 { 1399 int size; 1400 u32 naddr; 1401 const u32 *prop; 1402 1403 prop = fdt_getprop(fdt, node, "#address-cells", &size); 1404 if (prop && size == 4) 1405 naddr = *prop; 1406 else 1407 naddr = 2; 1408 1409 prop = fdt_getprop(fdt, node, "ranges", &size); 1410 1411 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0; 1412 } 1413