1 /* 2 * (C) Copyright 2007 3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com 4 * 5 * Copyright 2010 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(void *fdt, const char *path, const char *prop, 53 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 *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_SERIAL_MULTI 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 #else 110 static inline void fdt_fill_multisername(char *sername, size_t maxlen) {} 111 #endif /* CONFIG_SERIAL_MULTI */ 112 113 static int fdt_fixup_stdout(void *fdt, int chosenoff) 114 { 115 int err = 0; 116 #ifdef CONFIG_CONS_INDEX 117 int node; 118 char sername[9] = { 0 }; 119 const char *path; 120 121 fdt_fill_multisername(sername, sizeof(sername) - 1); 122 if (!sername[0]) 123 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 124 125 err = node = fdt_path_offset(fdt, "/aliases"); 126 if (node >= 0) { 127 int len; 128 path = fdt_getprop(fdt, node, sername, &len); 129 if (path) { 130 char *p = malloc(len); 131 err = -FDT_ERR_NOSPACE; 132 if (p) { 133 memcpy(p, path, len); 134 err = fdt_setprop(fdt, chosenoff, 135 "linux,stdout-path", p, len); 136 free(p); 137 } 138 } else { 139 err = len; 140 } 141 } 142 #endif 143 if (err < 0) 144 printf("WARNING: could not set linux,stdout-path %s.\n", 145 fdt_strerror(err)); 146 147 return err; 148 } 149 #endif 150 151 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force) 152 { 153 int nodeoffset; 154 int err, j, total; 155 u32 tmp; 156 const char *path; 157 uint64_t addr, size; 158 159 /* Find the "chosen" node. */ 160 nodeoffset = fdt_path_offset (fdt, "/chosen"); 161 162 /* If there is no "chosen" node in the blob return */ 163 if (nodeoffset < 0) { 164 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset)); 165 return nodeoffset; 166 } 167 168 /* just return if initrd_start/end aren't valid */ 169 if ((initrd_start == 0) || (initrd_end == 0)) 170 return 0; 171 172 total = fdt_num_mem_rsv(fdt); 173 174 /* 175 * Look for an existing entry and update it. If we don't find 176 * the entry, we will j be the next available slot. 177 */ 178 for (j = 0; j < total; j++) { 179 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 180 if (addr == initrd_start) { 181 fdt_del_mem_rsv(fdt, j); 182 break; 183 } 184 } 185 186 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start + 1); 187 if (err < 0) { 188 printf("fdt_initrd: %s\n", fdt_strerror(err)); 189 return err; 190 } 191 192 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL); 193 if ((path == NULL) || force) { 194 tmp = __cpu_to_be32(initrd_start); 195 err = fdt_setprop(fdt, nodeoffset, 196 "linux,initrd-start", &tmp, sizeof(tmp)); 197 if (err < 0) { 198 printf("WARNING: " 199 "could not set linux,initrd-start %s.\n", 200 fdt_strerror(err)); 201 return err; 202 } 203 tmp = __cpu_to_be32(initrd_end); 204 err = fdt_setprop(fdt, nodeoffset, 205 "linux,initrd-end", &tmp, sizeof(tmp)); 206 if (err < 0) { 207 printf("WARNING: could not set linux,initrd-end %s.\n", 208 fdt_strerror(err)); 209 210 return err; 211 } 212 } 213 214 return 0; 215 } 216 217 int fdt_chosen(void *fdt, int force) 218 { 219 int nodeoffset; 220 int err; 221 char *str; /* used to set string properties */ 222 const char *path; 223 224 err = fdt_check_header(fdt); 225 if (err < 0) { 226 printf("fdt_chosen: %s\n", fdt_strerror(err)); 227 return err; 228 } 229 230 /* 231 * Find the "chosen" node. 232 */ 233 nodeoffset = fdt_path_offset (fdt, "/chosen"); 234 235 /* 236 * If there is no "chosen" node in the blob, create it. 237 */ 238 if (nodeoffset < 0) { 239 /* 240 * Create a new node "/chosen" (offset 0 is root level) 241 */ 242 nodeoffset = fdt_add_subnode(fdt, 0, "chosen"); 243 if (nodeoffset < 0) { 244 printf("WARNING: could not create /chosen %s.\n", 245 fdt_strerror(nodeoffset)); 246 return nodeoffset; 247 } 248 } 249 250 /* 251 * Create /chosen properites that don't exist in the fdt. 252 * If the property exists, update it only if the "force" parameter 253 * is true. 254 */ 255 str = getenv("bootargs"); 256 if (str != NULL) { 257 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL); 258 if ((path == NULL) || force) { 259 err = fdt_setprop(fdt, nodeoffset, 260 "bootargs", str, strlen(str)+1); 261 if (err < 0) 262 printf("WARNING: could not set bootargs %s.\n", 263 fdt_strerror(err)); 264 } 265 } 266 267 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 268 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 269 if ((path == NULL) || force) 270 err = fdt_fixup_stdout(fdt, nodeoffset); 271 #endif 272 273 #ifdef OF_STDOUT_PATH 274 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 275 if ((path == NULL) || force) { 276 err = fdt_setprop(fdt, nodeoffset, 277 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1); 278 if (err < 0) 279 printf("WARNING: could not set linux,stdout-path %s.\n", 280 fdt_strerror(err)); 281 } 282 #endif 283 284 return err; 285 } 286 287 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 288 const void *val, int len, int create) 289 { 290 #if defined(DEBUG) 291 int i; 292 debug("Updating property '%s/%s' = ", path, prop); 293 for (i = 0; i < len; i++) 294 debug(" %.2x", *(u8*)(val+i)); 295 debug("\n"); 296 #endif 297 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 298 if (rc) 299 printf("Unable to update property %s:%s, err=%s\n", 300 path, prop, fdt_strerror(rc)); 301 } 302 303 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 304 u32 val, int create) 305 { 306 val = cpu_to_fdt32(val); 307 do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create); 308 } 309 310 void do_fixup_by_prop(void *fdt, 311 const char *pname, const void *pval, int plen, 312 const char *prop, const void *val, int len, 313 int create) 314 { 315 int off; 316 #if defined(DEBUG) 317 int i; 318 debug("Updating property '%s' = ", prop); 319 for (i = 0; i < len; i++) 320 debug(" %.2x", *(u8*)(val+i)); 321 debug("\n"); 322 #endif 323 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 324 while (off != -FDT_ERR_NOTFOUND) { 325 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL)) 326 fdt_setprop(fdt, off, prop, val, len); 327 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 328 } 329 } 330 331 void do_fixup_by_prop_u32(void *fdt, 332 const char *pname, const void *pval, int plen, 333 const char *prop, u32 val, int create) 334 { 335 val = cpu_to_fdt32(val); 336 do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create); 337 } 338 339 void do_fixup_by_compat(void *fdt, const char *compat, 340 const char *prop, const void *val, int len, int create) 341 { 342 int off = -1; 343 #if defined(DEBUG) 344 int i; 345 debug("Updating property '%s' = ", prop); 346 for (i = 0; i < len; i++) 347 debug(" %.2x", *(u8*)(val+i)); 348 debug("\n"); 349 #endif 350 off = fdt_node_offset_by_compatible(fdt, -1, compat); 351 while (off != -FDT_ERR_NOTFOUND) { 352 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL)) 353 fdt_setprop(fdt, off, prop, val, len); 354 off = fdt_node_offset_by_compatible(fdt, off, compat); 355 } 356 } 357 358 void do_fixup_by_compat_u32(void *fdt, const char *compat, 359 const char *prop, u32 val, int create) 360 { 361 val = cpu_to_fdt32(val); 362 do_fixup_by_compat(fdt, compat, prop, &val, 4, create); 363 } 364 365 int fdt_fixup_memory(void *blob, u64 start, u64 size) 366 { 367 int err, nodeoffset, len = 0; 368 u8 tmp[16]; 369 const u32 *addrcell, *sizecell; 370 371 err = fdt_check_header(blob); 372 if (err < 0) { 373 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 374 return err; 375 } 376 377 /* update, or add and update /memory node */ 378 nodeoffset = fdt_path_offset(blob, "/memory"); 379 if (nodeoffset < 0) { 380 nodeoffset = fdt_add_subnode(blob, 0, "memory"); 381 if (nodeoffset < 0) 382 printf("WARNING: could not create /memory: %s.\n", 383 fdt_strerror(nodeoffset)); 384 return nodeoffset; 385 } 386 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 387 sizeof("memory")); 388 if (err < 0) { 389 printf("WARNING: could not set %s %s.\n", "device_type", 390 fdt_strerror(err)); 391 return err; 392 } 393 394 addrcell = fdt_getprop(blob, 0, "#address-cells", NULL); 395 /* use shifts and mask to ensure endianness */ 396 if ((addrcell) && (*addrcell == 2)) { 397 tmp[0] = (start >> 56) & 0xff; 398 tmp[1] = (start >> 48) & 0xff; 399 tmp[2] = (start >> 40) & 0xff; 400 tmp[3] = (start >> 32) & 0xff; 401 tmp[4] = (start >> 24) & 0xff; 402 tmp[5] = (start >> 16) & 0xff; 403 tmp[6] = (start >> 8) & 0xff; 404 tmp[7] = (start ) & 0xff; 405 len = 8; 406 } else { 407 tmp[0] = (start >> 24) & 0xff; 408 tmp[1] = (start >> 16) & 0xff; 409 tmp[2] = (start >> 8) & 0xff; 410 tmp[3] = (start ) & 0xff; 411 len = 4; 412 } 413 414 sizecell = fdt_getprop(blob, 0, "#size-cells", NULL); 415 /* use shifts and mask to ensure endianness */ 416 if ((sizecell) && (*sizecell == 2)) { 417 tmp[0+len] = (size >> 56) & 0xff; 418 tmp[1+len] = (size >> 48) & 0xff; 419 tmp[2+len] = (size >> 40) & 0xff; 420 tmp[3+len] = (size >> 32) & 0xff; 421 tmp[4+len] = (size >> 24) & 0xff; 422 tmp[5+len] = (size >> 16) & 0xff; 423 tmp[6+len] = (size >> 8) & 0xff; 424 tmp[7+len] = (size ) & 0xff; 425 len += 8; 426 } else { 427 tmp[0+len] = (size >> 24) & 0xff; 428 tmp[1+len] = (size >> 16) & 0xff; 429 tmp[2+len] = (size >> 8) & 0xff; 430 tmp[3+len] = (size ) & 0xff; 431 len += 4; 432 } 433 434 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 435 if (err < 0) { 436 printf("WARNING: could not set %s %s.\n", 437 "reg", fdt_strerror(err)); 438 return err; 439 } 440 return 0; 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] = "ethaddr"; 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 while ((tmp = getenv(mac)) != NULL) { 457 sprintf(enet, "ethernet%d", i); 458 path = fdt_getprop(fdt, node, enet, NULL); 459 if (!path) { 460 debug("No alias for %s\n", enet); 461 sprintf(mac, "eth%daddr", ++i); 462 continue; 463 } 464 465 for (j = 0; j < 6; j++) { 466 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0; 467 if (tmp) 468 tmp = (*end) ? end+1 : end; 469 } 470 471 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0); 472 do_fixup_by_path(fdt, path, "local-mac-address", 473 &mac_addr, 6, 1); 474 475 sprintf(mac, "eth%daddr", ++i); 476 } 477 } 478 479 /* Resize the fdt to its actual size + a bit of padding */ 480 int fdt_resize(void *blob) 481 { 482 int i; 483 uint64_t addr, size; 484 int total, ret; 485 uint actualsize; 486 487 if (!blob) 488 return 0; 489 490 total = fdt_num_mem_rsv(blob); 491 for (i = 0; i < total; i++) { 492 fdt_get_mem_rsv(blob, i, &addr, &size); 493 if (addr == (uint64_t)(u32)blob) { 494 fdt_del_mem_rsv(blob, i); 495 break; 496 } 497 } 498 499 /* 500 * Calculate the actual size of the fdt 501 * plus the size needed for 5 fdt_add_mem_rsv, one 502 * for the fdt itself and 4 for a possible initrd 503 * ((initrd-start + initrd-end) * 2 (name & value)) 504 */ 505 actualsize = fdt_off_dt_strings(blob) + 506 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 507 508 /* Make it so the fdt ends on a page boundary */ 509 actualsize = ALIGN(actualsize + ((uint)blob & 0xfff), 0x1000); 510 actualsize = actualsize - ((uint)blob & 0xfff); 511 512 /* Change the fdt header to reflect the correct size */ 513 fdt_set_totalsize(blob, actualsize); 514 515 /* Add the new reservation */ 516 ret = fdt_add_mem_rsv(blob, (uint)blob, actualsize); 517 if (ret < 0) 518 return ret; 519 520 return actualsize; 521 } 522 523 #ifdef CONFIG_PCI 524 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 525 526 #define FDT_PCI_PREFETCH (0x40000000) 527 #define FDT_PCI_MEM32 (0x02000000) 528 #define FDT_PCI_IO (0x01000000) 529 #define FDT_PCI_MEM64 (0x03000000) 530 531 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 532 533 int addrcell, sizecell, len, r; 534 u32 *dma_range; 535 /* sized based on pci addr cells, size-cells, & address-cells */ 536 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 537 538 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 539 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 540 541 dma_range = &dma_ranges[0]; 542 for (r = 0; r < hose->region_count; r++) { 543 u64 bus_start, phys_start, size; 544 545 /* skip if !PCI_REGION_SYS_MEMORY */ 546 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 547 continue; 548 549 bus_start = (u64)hose->regions[r].bus_start; 550 phys_start = (u64)hose->regions[r].phys_start; 551 size = (u64)hose->regions[r].size; 552 553 dma_range[0] = 0; 554 if (size >= 0x100000000ull) 555 dma_range[0] |= FDT_PCI_MEM64; 556 else 557 dma_range[0] |= FDT_PCI_MEM32; 558 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 559 dma_range[0] |= FDT_PCI_PREFETCH; 560 #ifdef CONFIG_SYS_PCI_64BIT 561 dma_range[1] = bus_start >> 32; 562 #else 563 dma_range[1] = 0; 564 #endif 565 dma_range[2] = bus_start & 0xffffffff; 566 567 if (addrcell == 2) { 568 dma_range[3] = phys_start >> 32; 569 dma_range[4] = phys_start & 0xffffffff; 570 } else { 571 dma_range[3] = phys_start & 0xffffffff; 572 } 573 574 if (sizecell == 2) { 575 dma_range[3 + addrcell + 0] = size >> 32; 576 dma_range[3 + addrcell + 1] = size & 0xffffffff; 577 } else { 578 dma_range[3 + addrcell + 0] = size & 0xffffffff; 579 } 580 581 dma_range += (3 + addrcell + sizecell); 582 } 583 584 len = dma_range - &dma_ranges[0]; 585 if (len) 586 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 587 588 return 0; 589 } 590 #endif 591 592 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE 593 /* 594 * Provide a weak default function to return the flash bank size. 595 * There might be multiple non-identical flash chips connected to one 596 * chip-select, so we need to pass an index as well. 597 */ 598 u32 __flash_get_bank_size(int cs, int idx) 599 { 600 extern flash_info_t flash_info[]; 601 602 /* 603 * As default, a simple 1:1 mapping is provided. Boards with 604 * a different mapping need to supply a board specific mapping 605 * routine. 606 */ 607 return flash_info[cs].size; 608 } 609 u32 flash_get_bank_size(int cs, int idx) 610 __attribute__((weak, alias("__flash_get_bank_size"))); 611 612 /* 613 * This function can be used to update the size in the "reg" property 614 * of all NOR FLASH device nodes. This is necessary for boards with 615 * non-fixed NOR FLASH sizes. 616 */ 617 int fdt_fixup_nor_flash_size(void *blob) 618 { 619 char compat[][16] = { "cfi-flash", "jedec-flash" }; 620 int off; 621 int len; 622 struct fdt_property *prop; 623 u32 *reg, *reg2; 624 int i; 625 626 for (i = 0; i < 2; i++) { 627 off = fdt_node_offset_by_compatible(blob, -1, compat[i]); 628 while (off != -FDT_ERR_NOTFOUND) { 629 int idx; 630 631 /* 632 * Found one compatible node, so fixup the size 633 * int its reg properties 634 */ 635 prop = fdt_get_property_w(blob, off, "reg", &len); 636 if (prop) { 637 int tuple_size = 3 * sizeof(reg); 638 639 /* 640 * There might be multiple reg-tuples, 641 * so loop through them all 642 */ 643 reg = reg2 = (u32 *)&prop->data[0]; 644 for (idx = 0; idx < (len / tuple_size); idx++) { 645 /* 646 * Update size in reg property 647 */ 648 reg[2] = flash_get_bank_size(reg[0], 649 idx); 650 651 /* 652 * Point to next reg tuple 653 */ 654 reg += 3; 655 } 656 657 fdt_setprop(blob, off, "reg", reg2, len); 658 } 659 660 /* Move to next compatible node */ 661 off = fdt_node_offset_by_compatible(blob, off, 662 compat[i]); 663 } 664 } 665 666 return 0; 667 } 668 #endif 669 670 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 671 #include <jffs2/load_kernel.h> 672 #include <mtd_node.h> 673 674 struct reg_cell { 675 unsigned int r0; 676 unsigned int r1; 677 }; 678 679 int fdt_del_subnodes(const void *blob, int parent_offset) 680 { 681 int off, ndepth; 682 int ret; 683 684 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 685 (off >= 0) && (ndepth > 0); 686 off = fdt_next_node(blob, off, &ndepth)) { 687 if (ndepth == 1) { 688 debug("delete %s: offset: %x\n", 689 fdt_get_name(blob, off, 0), off); 690 ret = fdt_del_node((void *)blob, off); 691 if (ret < 0) { 692 printf("Can't delete node: %s\n", 693 fdt_strerror(ret)); 694 return ret; 695 } else { 696 ndepth = 0; 697 off = parent_offset; 698 } 699 } 700 } 701 return 0; 702 } 703 704 int fdt_increase_size(void *fdt, int add_len) 705 { 706 int newlen; 707 708 newlen = fdt_totalsize(fdt) + add_len; 709 710 /* Open in place with a new len */ 711 return fdt_open_into(fdt, fdt, newlen); 712 } 713 714 int fdt_del_partitions(void *blob, int parent_offset) 715 { 716 const void *prop; 717 int ndepth = 0; 718 int off; 719 int ret; 720 721 off = fdt_next_node(blob, parent_offset, &ndepth); 722 if (off > 0 && ndepth == 1) { 723 prop = fdt_getprop(blob, off, "label", NULL); 724 if (prop == NULL) { 725 /* 726 * Could not find label property, nand {}; node? 727 * Check subnode, delete partitions there if any. 728 */ 729 return fdt_del_partitions(blob, off); 730 } else { 731 ret = fdt_del_subnodes(blob, parent_offset); 732 if (ret < 0) { 733 printf("Can't remove subnodes: %s\n", 734 fdt_strerror(ret)); 735 return ret; 736 } 737 } 738 } 739 return 0; 740 } 741 742 int fdt_node_set_part_info(void *blob, int parent_offset, 743 struct mtd_device *dev) 744 { 745 struct list_head *pentry; 746 struct part_info *part; 747 struct reg_cell cell; 748 int off, ndepth = 0; 749 int part_num, ret; 750 char buf[64]; 751 752 ret = fdt_del_partitions(blob, parent_offset); 753 if (ret < 0) 754 return ret; 755 756 /* 757 * Check if it is nand {}; subnode, adjust 758 * the offset in this case 759 */ 760 off = fdt_next_node(blob, parent_offset, &ndepth); 761 if (off > 0 && ndepth == 1) 762 parent_offset = off; 763 764 part_num = 0; 765 list_for_each_prev(pentry, &dev->parts) { 766 int newoff; 767 768 part = list_entry(pentry, struct part_info, link); 769 770 debug("%2d: %-20s0x%08x\t0x%08x\t%d\n", 771 part_num, part->name, part->size, 772 part->offset, part->mask_flags); 773 774 sprintf(buf, "partition@%x", part->offset); 775 add_sub: 776 ret = fdt_add_subnode(blob, parent_offset, buf); 777 if (ret == -FDT_ERR_NOSPACE) { 778 ret = fdt_increase_size(blob, 512); 779 if (!ret) 780 goto add_sub; 781 else 782 goto err_size; 783 } else if (ret < 0) { 784 printf("Can't add partition node: %s\n", 785 fdt_strerror(ret)); 786 return ret; 787 } 788 newoff = ret; 789 790 /* Check MTD_WRITEABLE_CMD flag */ 791 if (part->mask_flags & 1) { 792 add_ro: 793 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 794 if (ret == -FDT_ERR_NOSPACE) { 795 ret = fdt_increase_size(blob, 512); 796 if (!ret) 797 goto add_ro; 798 else 799 goto err_size; 800 } else if (ret < 0) 801 goto err_prop; 802 } 803 804 cell.r0 = cpu_to_fdt32(part->offset); 805 cell.r1 = cpu_to_fdt32(part->size); 806 add_reg: 807 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 808 if (ret == -FDT_ERR_NOSPACE) { 809 ret = fdt_increase_size(blob, 512); 810 if (!ret) 811 goto add_reg; 812 else 813 goto err_size; 814 } else if (ret < 0) 815 goto err_prop; 816 817 add_label: 818 ret = fdt_setprop_string(blob, newoff, "label", part->name); 819 if (ret == -FDT_ERR_NOSPACE) { 820 ret = fdt_increase_size(blob, 512); 821 if (!ret) 822 goto add_label; 823 else 824 goto err_size; 825 } else if (ret < 0) 826 goto err_prop; 827 828 part_num++; 829 } 830 return 0; 831 err_size: 832 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 833 return ret; 834 err_prop: 835 printf("Can't add property: %s\n", fdt_strerror(ret)); 836 return ret; 837 } 838 839 /* 840 * Update partitions in nor/nand nodes using info from 841 * mtdparts environment variable. The nodes to update are 842 * specified by node_info structure which contains mtd device 843 * type and compatible string: E. g. the board code in 844 * ft_board_setup() could use: 845 * 846 * struct node_info nodes[] = { 847 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 848 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 849 * }; 850 * 851 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 852 */ 853 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 854 { 855 struct node_info *ni = node_info; 856 struct mtd_device *dev; 857 char *parts; 858 int i, idx; 859 int noff; 860 861 parts = getenv("mtdparts"); 862 if (!parts) 863 return; 864 865 if (mtdparts_init() != 0) 866 return; 867 868 for (i = 0; i < node_info_size; i++) { 869 idx = 0; 870 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 871 while (noff != -FDT_ERR_NOTFOUND) { 872 debug("%s: %s, mtd dev type %d\n", 873 fdt_get_name(blob, noff, 0), 874 ni[i].compat, ni[i].type); 875 dev = device_find(ni[i].type, idx++); 876 if (dev) { 877 if (fdt_node_set_part_info(blob, noff, dev)) 878 return; /* return on error */ 879 } 880 881 /* Jump to next flash node */ 882 noff = fdt_node_offset_by_compatible(blob, noff, 883 ni[i].compat); 884 } 885 } 886 } 887 #endif 888 889 void fdt_del_node_and_alias(void *blob, const char *alias) 890 { 891 int off = fdt_path_offset(blob, alias); 892 893 if (off < 0) 894 return; 895 896 fdt_del_node(blob, off); 897 898 off = fdt_path_offset(blob, "/aliases"); 899 fdt_delprop(blob, off, alias); 900 } 901 902 /* Helper to read a big number; size is in cells (not bytes) */ 903 static inline u64 of_read_number(const __be32 *cell, int size) 904 { 905 u64 r = 0; 906 while (size--) 907 r = (r << 32) | be32_to_cpu(*(cell++)); 908 return r; 909 } 910 911 #define PRu64 "%llx" 912 913 /* Max address size we deal with */ 914 #define OF_MAX_ADDR_CELLS 4 915 #define OF_BAD_ADDR ((u64)-1) 916 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 917 (ns) > 0) 918 919 /* Debug utility */ 920 #ifdef DEBUG 921 static void of_dump_addr(const char *s, const u32 *addr, int na) 922 { 923 printf("%s", s); 924 while(na--) 925 printf(" %08x", *(addr++)); 926 printf("\n"); 927 } 928 #else 929 static void of_dump_addr(const char *s, const u32 *addr, int na) { } 930 #endif 931 932 /* Callbacks for bus specific translators */ 933 struct of_bus { 934 const char *name; 935 const char *addresses; 936 void (*count_cells)(void *blob, int parentoffset, 937 int *addrc, int *sizec); 938 u64 (*map)(u32 *addr, const u32 *range, 939 int na, int ns, int pna); 940 int (*translate)(u32 *addr, u64 offset, int na); 941 }; 942 943 /* Default translator (generic bus) */ 944 static void of_bus_default_count_cells(void *blob, int parentoffset, 945 int *addrc, int *sizec) 946 { 947 const u32 *prop; 948 949 if (addrc) { 950 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL); 951 if (prop) 952 *addrc = be32_to_cpup(prop); 953 else 954 *addrc = 2; 955 } 956 957 if (sizec) { 958 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 959 if (prop) 960 *sizec = be32_to_cpup(prop); 961 else 962 *sizec = 1; 963 } 964 } 965 966 static u64 of_bus_default_map(u32 *addr, const u32 *range, 967 int na, int ns, int pna) 968 { 969 u64 cp, s, da; 970 971 cp = of_read_number(range, na); 972 s = of_read_number(range + na + pna, ns); 973 da = of_read_number(addr, na); 974 975 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n", 976 cp, s, da); 977 978 if (da < cp || da >= (cp + s)) 979 return OF_BAD_ADDR; 980 return da - cp; 981 } 982 983 static int of_bus_default_translate(u32 *addr, u64 offset, int na) 984 { 985 u64 a = of_read_number(addr, na); 986 memset(addr, 0, na * 4); 987 a += offset; 988 if (na > 1) 989 addr[na - 2] = a >> 32; 990 addr[na - 1] = a & 0xffffffffu; 991 992 return 0; 993 } 994 995 /* Array of bus specific translators */ 996 static struct of_bus of_busses[] = { 997 /* Default */ 998 { 999 .name = "default", 1000 .addresses = "reg", 1001 .count_cells = of_bus_default_count_cells, 1002 .map = of_bus_default_map, 1003 .translate = of_bus_default_translate, 1004 }, 1005 }; 1006 1007 static int of_translate_one(void * blob, int parent, struct of_bus *bus, 1008 struct of_bus *pbus, u32 *addr, 1009 int na, int ns, int pna, const char *rprop) 1010 { 1011 const u32 *ranges; 1012 int rlen; 1013 int rone; 1014 u64 offset = OF_BAD_ADDR; 1015 1016 /* Normally, an absence of a "ranges" property means we are 1017 * crossing a non-translatable boundary, and thus the addresses 1018 * below the current not cannot be converted to CPU physical ones. 1019 * Unfortunately, while this is very clear in the spec, it's not 1020 * what Apple understood, and they do have things like /uni-n or 1021 * /ht nodes with no "ranges" property and a lot of perfectly 1022 * useable mapped devices below them. Thus we treat the absence of 1023 * "ranges" as equivalent to an empty "ranges" property which means 1024 * a 1:1 translation at that level. It's up to the caller not to try 1025 * to translate addresses that aren't supposed to be translated in 1026 * the first place. --BenH. 1027 */ 1028 ranges = (u32 *)fdt_getprop(blob, parent, rprop, &rlen); 1029 if (ranges == NULL || rlen == 0) { 1030 offset = of_read_number(addr, na); 1031 memset(addr, 0, pna * 4); 1032 debug("OF: no ranges, 1:1 translation\n"); 1033 goto finish; 1034 } 1035 1036 debug("OF: walking ranges...\n"); 1037 1038 /* Now walk through the ranges */ 1039 rlen /= 4; 1040 rone = na + pna + ns; 1041 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1042 offset = bus->map(addr, ranges, na, ns, pna); 1043 if (offset != OF_BAD_ADDR) 1044 break; 1045 } 1046 if (offset == OF_BAD_ADDR) { 1047 debug("OF: not found !\n"); 1048 return 1; 1049 } 1050 memcpy(addr, ranges + na, 4 * pna); 1051 1052 finish: 1053 of_dump_addr("OF: parent translation for:", addr, pna); 1054 debug("OF: with offset: "PRu64"\n", offset); 1055 1056 /* Translate it into parent bus space */ 1057 return pbus->translate(addr, offset, pna); 1058 } 1059 1060 /* 1061 * Translate an address from the device-tree into a CPU physical address, 1062 * this walks up the tree and applies the various bus mappings on the 1063 * way. 1064 * 1065 * Note: We consider that crossing any level with #size-cells == 0 to mean 1066 * that translation is impossible (that is we are not dealing with a value 1067 * that can be mapped to a cpu physical address). This is not really specified 1068 * that way, but this is traditionally the way IBM at least do things 1069 */ 1070 u64 __of_translate_address(void *blob, int node_offset, const u32 *in_addr, 1071 const char *rprop) 1072 { 1073 int parent; 1074 struct of_bus *bus, *pbus; 1075 u32 addr[OF_MAX_ADDR_CELLS]; 1076 int na, ns, pna, pns; 1077 u64 result = OF_BAD_ADDR; 1078 1079 debug("OF: ** translation for device %s **\n", 1080 fdt_get_name(blob, node_offset, NULL)); 1081 1082 /* Get parent & match bus type */ 1083 parent = fdt_parent_offset(blob, node_offset); 1084 if (parent < 0) 1085 goto bail; 1086 bus = &of_busses[0]; 1087 1088 /* Cound address cells & copy address locally */ 1089 bus->count_cells(blob, parent, &na, &ns); 1090 if (!OF_CHECK_COUNTS(na, ns)) { 1091 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1092 fdt_get_name(blob, node_offset, NULL)); 1093 goto bail; 1094 } 1095 memcpy(addr, in_addr, na * 4); 1096 1097 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1098 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1099 of_dump_addr("OF: translating address:", addr, na); 1100 1101 /* Translate */ 1102 for (;;) { 1103 /* Switch to parent bus */ 1104 node_offset = parent; 1105 parent = fdt_parent_offset(blob, node_offset); 1106 1107 /* If root, we have finished */ 1108 if (parent < 0) { 1109 debug("OF: reached root node\n"); 1110 result = of_read_number(addr, na); 1111 break; 1112 } 1113 1114 /* Get new parent bus and counts */ 1115 pbus = &of_busses[0]; 1116 pbus->count_cells(blob, parent, &pna, &pns); 1117 if (!OF_CHECK_COUNTS(pna, pns)) { 1118 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1119 fdt_get_name(blob, node_offset, NULL)); 1120 break; 1121 } 1122 1123 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1124 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1125 1126 /* Apply bus translation */ 1127 if (of_translate_one(blob, node_offset, bus, pbus, 1128 addr, na, ns, pna, rprop)) 1129 break; 1130 1131 /* Complete the move up one level */ 1132 na = pna; 1133 ns = pns; 1134 bus = pbus; 1135 1136 of_dump_addr("OF: one level translation:", addr, na); 1137 } 1138 bail: 1139 1140 return result; 1141 } 1142 1143 u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr) 1144 { 1145 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1146 } 1147 1148 /** 1149 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1150 * who's reg property matches a physical cpu address 1151 * 1152 * @blob: ptr to device tree 1153 * @compat: compatiable string to match 1154 * @compat_off: property name 1155 * 1156 */ 1157 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1158 phys_addr_t compat_off) 1159 { 1160 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1161 while (off != -FDT_ERR_NOTFOUND) { 1162 u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", &len); 1163 if (reg) { 1164 if (compat_off == fdt_translate_address(blob, off, reg)) 1165 return off; 1166 } 1167 off = fdt_node_offset_by_compatible(blob, off, compat); 1168 } 1169 1170 return -FDT_ERR_NOTFOUND; 1171 } 1172 1173 /** 1174 * fdt_alloc_phandle: Return next free phandle value 1175 * 1176 * @blob: ptr to device tree 1177 */ 1178 int fdt_alloc_phandle(void *blob) 1179 { 1180 int offset, len, phandle = 0; 1181 const u32 *val; 1182 1183 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1184 offset = fdt_next_node(blob, offset, NULL)) { 1185 val = fdt_getprop(blob, offset, "linux,phandle", &len); 1186 if (val) 1187 phandle = max(*val, phandle); 1188 } 1189 1190 return phandle + 1; 1191 } 1192