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 <exports.h> 12 #include <fdt_support.h> 13 #include <fdtdec.h> 14 #include <inttypes.h> 15 #ifdef CONFIG_MTD_BLK 16 #include <mtd_blk.h> 17 #endif 18 #include <stdio_dev.h> 19 #include <asm/arch/hotkey.h> 20 #include <asm/global_data.h> 21 #include <linux/ctype.h> 22 #include <linux/libfdt.h> 23 #include <linux/types.h> 24 25 /** 26 * fdt_getprop_u32_default_node - Return a node's property or a default 27 * 28 * @fdt: ptr to device tree 29 * @off: offset of node 30 * @cell: cell offset in property 31 * @prop: property name 32 * @dflt: default value if the property isn't found 33 * 34 * Convenience function to return a node's property or a default value if 35 * the property doesn't exist. 36 */ 37 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, 38 const char *prop, const u32 dflt) 39 { 40 const fdt32_t *val; 41 int len; 42 43 val = fdt_getprop(fdt, off, prop, &len); 44 45 /* Check if property exists */ 46 if (!val) 47 return dflt; 48 49 /* Check if property is long enough */ 50 if (len < ((cell + 1) * sizeof(uint32_t))) 51 return dflt; 52 53 return fdt32_to_cpu(*val); 54 } 55 56 /** 57 * fdt_getprop_u32_default - Find a node and return it's property or a default 58 * 59 * @fdt: ptr to device tree 60 * @path: path of node 61 * @prop: property name 62 * @dflt: default value if the property isn't found 63 * 64 * Convenience function to find a node and return it's property or a 65 * default value if it doesn't exist. 66 */ 67 u32 fdt_getprop_u32_default(const void *fdt, const char *path, 68 const char *prop, const u32 dflt) 69 { 70 int off; 71 72 off = fdt_path_offset(fdt, path); 73 if (off < 0) 74 return dflt; 75 76 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); 77 } 78 79 /** 80 * fdt_find_and_setprop: Find a node and set it's property 81 * 82 * @fdt: ptr to device tree 83 * @node: path of node 84 * @prop: property name 85 * @val: ptr to new value 86 * @len: length of new property value 87 * @create: flag to create the property if it doesn't exist 88 * 89 * Convenience function to directly set a property given the path to the node. 90 */ 91 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 92 const void *val, int len, int create) 93 { 94 int nodeoff = fdt_path_offset(fdt, node); 95 96 if (nodeoff < 0) 97 return nodeoff; 98 99 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) 100 return 0; /* create flag not set; so exit quietly */ 101 102 return fdt_setprop(fdt, nodeoff, prop, val, len); 103 } 104 105 /** 106 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node 107 * 108 * @fdt: pointer to the device tree blob 109 * @parentoffset: structure block offset of a node 110 * @name: name of the subnode to locate 111 * 112 * fdt_subnode_offset() finds a subnode of the node with a given name. 113 * If the subnode does not exist, it will be created. 114 */ 115 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) 116 { 117 int offset; 118 119 offset = fdt_subnode_offset(fdt, parentoffset, name); 120 121 if (offset == -FDT_ERR_NOTFOUND) 122 offset = fdt_add_subnode(fdt, parentoffset, name); 123 124 if (offset < 0) 125 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset)); 126 127 return offset; 128 } 129 130 /* rename to CONFIG_OF_STDOUT_PATH ? */ 131 #if defined(OF_STDOUT_PATH) 132 static int fdt_fixup_stdout(void *fdt, int chosenoff) 133 { 134 return fdt_setprop(fdt, chosenoff, "linux,stdout-path", 135 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); 136 } 137 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) 138 static int fdt_fixup_stdout(void *fdt, int chosenoff) 139 { 140 int err; 141 int aliasoff; 142 char sername[9] = { 0 }; 143 const void *path; 144 int len; 145 char tmp[256]; /* long enough */ 146 147 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 148 149 aliasoff = fdt_path_offset(fdt, "/aliases"); 150 if (aliasoff < 0) { 151 err = aliasoff; 152 goto noalias; 153 } 154 155 path = fdt_getprop(fdt, aliasoff, sername, &len); 156 if (!path) { 157 err = len; 158 goto noalias; 159 } 160 161 /* fdt_setprop may break "path" so we copy it to tmp buffer */ 162 memcpy(tmp, path, len); 163 164 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); 165 if (err < 0) 166 printf("WARNING: could not set linux,stdout-path %s.\n", 167 fdt_strerror(err)); 168 169 return err; 170 171 noalias: 172 printf("WARNING: %s: could not read %s alias: %s\n", 173 __func__, sername, fdt_strerror(err)); 174 175 return 0; 176 } 177 #else 178 static int fdt_fixup_stdout(void *fdt, int chosenoff) 179 { 180 return 0; 181 } 182 #endif 183 184 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, 185 uint64_t val, int is_u64) 186 { 187 if (is_u64) 188 return fdt_setprop_u64(fdt, nodeoffset, name, val); 189 else 190 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); 191 } 192 193 int fdt_root(void *fdt) 194 { 195 char *serial; 196 int err; 197 198 err = fdt_check_header(fdt); 199 if (err < 0) { 200 printf("fdt_root: %s\n", fdt_strerror(err)); 201 return err; 202 } 203 204 serial = env_get("serial#"); 205 if (serial) { 206 err = fdt_setprop(fdt, 0, "serial-number", serial, 207 strlen(serial) + 1); 208 209 if (err < 0) { 210 printf("WARNING: could not set serial-number %s.\n", 211 fdt_strerror(err)); 212 return err; 213 } 214 } 215 216 return 0; 217 } 218 219 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) 220 { 221 int nodeoffset; 222 int err, j, total; 223 int is_u64; 224 uint64_t addr, size; 225 226 /* just return if the size of initrd is zero */ 227 if (initrd_start == initrd_end) 228 return 0; 229 230 /* find or create "/chosen" node. */ 231 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 232 if (nodeoffset < 0) 233 return nodeoffset; 234 235 total = fdt_num_mem_rsv(fdt); 236 237 /* 238 * Look for an existing entry and update it. If we don't find 239 * the entry, we will j be the next available slot. 240 */ 241 for (j = 0; j < total; j++) { 242 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 243 if (addr == initrd_start) { 244 fdt_del_mem_rsv(fdt, j); 245 break; 246 } 247 } 248 249 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); 250 if (err < 0) { 251 printf("fdt_initrd: %s\n", fdt_strerror(err)); 252 return err; 253 } 254 255 is_u64 = (fdt_address_cells(fdt, 0) == 2); 256 257 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", 258 (uint64_t)initrd_start, is_u64); 259 260 if (err < 0) { 261 printf("WARNING: could not set linux,initrd-start %s.\n", 262 fdt_strerror(err)); 263 return err; 264 } 265 266 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", 267 (uint64_t)initrd_end, is_u64); 268 269 if (err < 0) { 270 printf("WARNING: could not set linux,initrd-end %s.\n", 271 fdt_strerror(err)); 272 273 return err; 274 } 275 276 return 0; 277 } 278 279 int fdt_chosen(void *fdt) 280 { 281 /* 282 * "bootargs_ext" is used when dtbo is applied. 283 */ 284 const char *arr_bootargs[] = { "bootargs", "bootargs_ext" }; 285 int nodeoffset; 286 int err; 287 int i; 288 char *str; /* used to set string properties */ 289 290 err = fdt_check_header(fdt); 291 if (err < 0) { 292 printf("fdt_chosen: %s\n", fdt_strerror(err)); 293 return err; 294 } 295 296 /* find or create "/chosen" node. */ 297 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); 298 if (nodeoffset < 0) 299 return nodeoffset; 300 301 str = env_get("bootargs"); 302 if (str) { 303 #ifdef CONFIG_ARCH_ROCKCHIP 304 const char *bootargs; 305 306 debug("uboot bootargs: %s\n\n", str); 307 for (i = 0; i < ARRAY_SIZE(arr_bootargs); i++) { 308 bootargs = fdt_getprop(fdt, nodeoffset, 309 arr_bootargs[i], NULL); 310 if (bootargs) { 311 debug("kernel %s: %s\n\n", arr_bootargs[i], bootargs); 312 /* 313 * Append kernel bootargs 314 * If use AB system, delete default "root=" which route 315 * to rootfs. Then the ab bootctl will choose the 316 * high priority system to boot and add its UUID 317 * to cmdline. The format is "roo=PARTUUID=xxxx...". 318 */ 319 hotkey_run(HK_INITCALL); 320 #ifdef CONFIG_ANDROID_AB 321 env_update_filter("bootargs", bootargs, "root="); 322 #else 323 env_update("bootargs", bootargs); 324 #endif 325 #ifdef CONFIG_MTD_BLK 326 char *mtd_par_info = mtd_part_parse(); 327 328 if (mtd_par_info) { 329 if (memcmp(env_get("devtype"), "mtd", 3) == 0) 330 env_update("bootargs", mtd_par_info); 331 } 332 #endif 333 /* 334 * Initrd fixup: remove unused "initrd=0x...,0x...", 335 * this for compatible with legacy parameter.txt 336 */ 337 env_delete("bootargs", "initrd=", 0); 338 } 339 #endif 340 } 341 342 str = env_get("bootargs"); 343 err = fdt_setprop(fdt, nodeoffset, "bootargs", str, 344 strlen(str) + 1); 345 if (err < 0) { 346 printf("WARNING: could not set bootargs %s.\n", 347 fdt_strerror(err)); 348 return err; 349 } 350 } 351 352 debug("merged bootargs: %s\n\n", env_get("bootargs")); 353 354 return fdt_fixup_stdout(fdt, nodeoffset); 355 } 356 357 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 358 const void *val, int len, int create) 359 { 360 #if defined(DEBUG) 361 int i; 362 debug("Updating property '%s/%s' = ", path, prop); 363 for (i = 0; i < len; i++) 364 debug(" %.2x", *(u8*)(val+i)); 365 debug("\n"); 366 #endif 367 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 368 if (rc) 369 printf("Unable to update property %s:%s, err=%s\n", 370 path, prop, fdt_strerror(rc)); 371 } 372 373 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 374 u32 val, int create) 375 { 376 fdt32_t tmp = cpu_to_fdt32(val); 377 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); 378 } 379 380 void do_fixup_by_prop(void *fdt, 381 const char *pname, const void *pval, int plen, 382 const char *prop, const void *val, int len, 383 int create) 384 { 385 int off; 386 #if defined(DEBUG) 387 int i; 388 debug("Updating property '%s' = ", prop); 389 for (i = 0; i < len; i++) 390 debug(" %.2x", *(u8*)(val+i)); 391 debug("\n"); 392 #endif 393 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 394 while (off != -FDT_ERR_NOTFOUND) { 395 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 396 fdt_setprop(fdt, off, prop, val, len); 397 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 398 } 399 } 400 401 void do_fixup_by_prop_u32(void *fdt, 402 const char *pname, const void *pval, int plen, 403 const char *prop, u32 val, int create) 404 { 405 fdt32_t tmp = cpu_to_fdt32(val); 406 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); 407 } 408 409 void do_fixup_by_compat(void *fdt, const char *compat, 410 const char *prop, const void *val, int len, int create) 411 { 412 int off = -1; 413 #if defined(DEBUG) 414 int i; 415 debug("Updating property '%s' = ", prop); 416 for (i = 0; i < len; i++) 417 debug(" %.2x", *(u8*)(val+i)); 418 debug("\n"); 419 #endif 420 off = fdt_node_offset_by_compatible(fdt, -1, compat); 421 while (off != -FDT_ERR_NOTFOUND) { 422 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) 423 fdt_setprop(fdt, off, prop, val, len); 424 off = fdt_node_offset_by_compatible(fdt, off, compat); 425 } 426 } 427 428 void do_fixup_by_compat_u32(void *fdt, const char *compat, 429 const char *prop, u32 val, int create) 430 { 431 fdt32_t tmp = cpu_to_fdt32(val); 432 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); 433 } 434 435 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY 436 /* 437 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream 438 */ 439 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, 440 int n) 441 { 442 int i; 443 int address_cells = fdt_address_cells(fdt, 0); 444 int size_cells = fdt_size_cells(fdt, 0); 445 char *p = buf; 446 447 for (i = 0; i < n; i++) { 448 if (address_cells == 2) 449 *(fdt64_t *)p = cpu_to_fdt64(address[i]); 450 else 451 *(fdt32_t *)p = cpu_to_fdt32(address[i]); 452 p += 4 * address_cells; 453 454 if (size_cells == 2) 455 *(fdt64_t *)p = cpu_to_fdt64(size[i]); 456 else 457 *(fdt32_t *)p = cpu_to_fdt32(size[i]); 458 p += 4 * size_cells; 459 } 460 461 return p - (char *)buf; 462 } 463 464 int fdt_record_loadable(void *blob, u32 index, const char *name, 465 uintptr_t load_addr, u32 size, uintptr_t entry_point, 466 const char *type, const char *os) 467 { 468 int err, node; 469 470 err = fdt_check_header(blob); 471 if (err < 0) { 472 printf("%s: %s\n", __func__, fdt_strerror(err)); 473 return err; 474 } 475 476 /* find or create "/fit-images" node */ 477 node = fdt_find_or_add_subnode(blob, 0, "fit-images"); 478 if (node < 0) 479 return node; 480 481 /* find or create "/fit-images/<name>" node */ 482 node = fdt_find_or_add_subnode(blob, node, name); 483 if (node < 0) 484 return node; 485 486 /* 487 * We record these as 32bit entities, possibly truncating addresses. 488 * However, spl_fit.c is not 64bit safe either: i.e. we should not 489 * have an issue here. 490 */ 491 fdt_setprop_u32(blob, node, "load-addr", load_addr); 492 if (entry_point != -1) 493 fdt_setprop_u32(blob, node, "entry-point", entry_point); 494 fdt_setprop_u32(blob, node, "size", size); 495 if (type) 496 fdt_setprop_string(blob, node, "type", type); 497 if (os) 498 fdt_setprop_string(blob, node, "os", os); 499 500 return node; 501 } 502 503 #ifdef CONFIG_NR_DRAM_BANKS 504 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS 505 #else 506 #define MEMORY_BANKS_MAX 4 507 #endif 508 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) 509 { 510 int err, nodeoffset; 511 int len; 512 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ 513 514 if (banks > MEMORY_BANKS_MAX) { 515 printf("%s: num banks %d exceeds hardcoded limit %d." 516 " Recompile with higher MEMORY_BANKS_MAX?\n", 517 __FUNCTION__, banks, MEMORY_BANKS_MAX); 518 return -1; 519 } 520 521 err = fdt_check_header(blob); 522 if (err < 0) { 523 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 524 return err; 525 } 526 527 /* find or create "/memory" node. */ 528 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); 529 if (nodeoffset < 0) 530 return nodeoffset; 531 532 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 533 sizeof("memory")); 534 if (err < 0) { 535 printf("WARNING: could not set %s %s.\n", "device_type", 536 fdt_strerror(err)); 537 return err; 538 } 539 540 if (!banks) 541 return 0; 542 543 len = fdt_pack_reg(blob, tmp, start, size, banks); 544 545 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 546 if (err < 0) { 547 printf("WARNING: could not set %s %s.\n", 548 "reg", fdt_strerror(err)); 549 return err; 550 } 551 return 0; 552 } 553 #endif 554 555 int fdt_fixup_memory(void *blob, u64 start, u64 size) 556 { 557 return fdt_fixup_memory_banks(blob, &start, &size, 1); 558 } 559 560 int fdt_update_reserved_memory(void *blob, char *name, u64 start, u64 size) 561 { 562 int nodeoffset, len, err; 563 u8 tmp[16]; /* Up to 64-bit address + 64-bit size */ 564 565 #if 0 566 /*name is rockchip_logo*/ 567 nodeoffset = fdt_find_or_add_subnode(blob, 0, "reserved-memory"); 568 if (nodeoffset < 0) 569 return nodeoffset; 570 printf("hjc>>reserved-memory>>%s, nodeoffset:%d\n", __func__, nodeoffset); 571 nodeoffset = fdt_find_or_add_subnode(blob, nodeoffset, name); 572 if (nodeoffset < 0) 573 return nodeoffset; 574 #else 575 nodeoffset = fdt_node_offset_by_compatible(blob, 0, name); 576 if (nodeoffset < 0) 577 debug("Can't find nodeoffset: %d\n", nodeoffset); 578 #endif 579 len = fdt_pack_reg(blob, tmp, &start, &size, 1); 580 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 581 if (err < 0) { 582 printf("WARNING: could not set %s %s.\n", 583 "reg", fdt_strerror(err)); 584 return err; 585 } 586 587 return nodeoffset; 588 } 589 590 void fdt_fixup_ethernet(void *fdt) 591 { 592 int i = 0, j, prop; 593 char *tmp, *end; 594 char mac[16]; 595 const char *path; 596 unsigned char mac_addr[ARP_HLEN]; 597 int offset; 598 #ifdef FDT_SEQ_MACADDR_FROM_ENV 599 int nodeoff; 600 const struct fdt_property *fdt_prop; 601 #endif 602 603 if (fdt_path_offset(fdt, "/aliases") < 0) 604 return; 605 606 /* Cycle through all aliases */ 607 for (prop = 0; ; prop++) { 608 const char *name; 609 610 /* FDT might have been edited, recompute the offset */ 611 offset = fdt_first_property_offset(fdt, 612 fdt_path_offset(fdt, "/aliases")); 613 /* Select property number 'prop' */ 614 for (j = 0; j < prop; j++) 615 offset = fdt_next_property_offset(fdt, offset); 616 617 if (offset < 0) 618 break; 619 620 path = fdt_getprop_by_offset(fdt, offset, &name, NULL); 621 if (!strncmp(name, "ethernet", 8)) { 622 /* Treat plain "ethernet" same as "ethernet0". */ 623 if (!strcmp(name, "ethernet") 624 #ifdef FDT_SEQ_MACADDR_FROM_ENV 625 || !strcmp(name, "ethernet0") 626 #endif 627 ) 628 i = 0; 629 #ifndef FDT_SEQ_MACADDR_FROM_ENV 630 else 631 i = trailing_strtol(name); 632 #endif 633 if (i != -1) { 634 if (i == 0) 635 strcpy(mac, "ethaddr"); 636 else 637 sprintf(mac, "eth%daddr", i); 638 } else { 639 continue; 640 } 641 #ifdef FDT_SEQ_MACADDR_FROM_ENV 642 nodeoff = fdt_path_offset(fdt, path); 643 fdt_prop = fdt_get_property(fdt, nodeoff, "status", 644 NULL); 645 if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) 646 continue; 647 i++; 648 #endif 649 tmp = env_get(mac); 650 if (!tmp) 651 continue; 652 653 for (j = 0; j < 6; j++) { 654 mac_addr[j] = tmp ? 655 simple_strtoul(tmp, &end, 16) : 0; 656 if (tmp) 657 tmp = (*end) ? end + 1 : end; 658 } 659 660 do_fixup_by_path(fdt, path, "mac-address", 661 &mac_addr, 6, 0); 662 do_fixup_by_path(fdt, path, "local-mac-address", 663 &mac_addr, 6, 1); 664 } 665 } 666 } 667 668 /* Resize the fdt to its actual size + a bit of padding */ 669 int fdt_shrink_to_minimum(void *blob, uint extrasize) 670 { 671 int i; 672 uint64_t addr, size; 673 int total, ret; 674 uint actualsize; 675 676 if (!blob) 677 return 0; 678 679 total = fdt_num_mem_rsv(blob); 680 for (i = 0; i < total; i++) { 681 fdt_get_mem_rsv(blob, i, &addr, &size); 682 if (addr == (uintptr_t)blob) { 683 fdt_del_mem_rsv(blob, i); 684 break; 685 } 686 } 687 688 /* 689 * Calculate the actual size of the fdt 690 * plus the size needed for 5 fdt_add_mem_rsv, one 691 * for the fdt itself and 4 for a possible initrd 692 * ((initrd-start + initrd-end) * 2 (name & value)) 693 */ 694 actualsize = fdt_off_dt_strings(blob) + 695 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry); 696 697 actualsize += extrasize; 698 /* Make it so the fdt ends on a page boundary */ 699 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000); 700 actualsize = actualsize - ((uintptr_t)blob & 0xfff); 701 702 /* Change the fdt header to reflect the correct size */ 703 fdt_set_totalsize(blob, actualsize); 704 705 /* Add the new reservation */ 706 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize); 707 if (ret < 0) 708 return ret; 709 710 return actualsize; 711 } 712 713 #ifdef CONFIG_PCI 714 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4 715 716 #define FDT_PCI_PREFETCH (0x40000000) 717 #define FDT_PCI_MEM32 (0x02000000) 718 #define FDT_PCI_IO (0x01000000) 719 #define FDT_PCI_MEM64 (0x03000000) 720 721 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { 722 723 int addrcell, sizecell, len, r; 724 u32 *dma_range; 725 /* sized based on pci addr cells, size-cells, & address-cells */ 726 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; 727 728 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); 729 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); 730 731 dma_range = &dma_ranges[0]; 732 for (r = 0; r < hose->region_count; r++) { 733 u64 bus_start, phys_start, size; 734 735 /* skip if !PCI_REGION_SYS_MEMORY */ 736 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY)) 737 continue; 738 739 bus_start = (u64)hose->regions[r].bus_start; 740 phys_start = (u64)hose->regions[r].phys_start; 741 size = (u64)hose->regions[r].size; 742 743 dma_range[0] = 0; 744 if (size >= 0x100000000ull) 745 dma_range[0] |= FDT_PCI_MEM64; 746 else 747 dma_range[0] |= FDT_PCI_MEM32; 748 if (hose->regions[r].flags & PCI_REGION_PREFETCH) 749 dma_range[0] |= FDT_PCI_PREFETCH; 750 #ifdef CONFIG_SYS_PCI_64BIT 751 dma_range[1] = bus_start >> 32; 752 #else 753 dma_range[1] = 0; 754 #endif 755 dma_range[2] = bus_start & 0xffffffff; 756 757 if (addrcell == 2) { 758 dma_range[3] = phys_start >> 32; 759 dma_range[4] = phys_start & 0xffffffff; 760 } else { 761 dma_range[3] = phys_start & 0xffffffff; 762 } 763 764 if (sizecell == 2) { 765 dma_range[3 + addrcell + 0] = size >> 32; 766 dma_range[3 + addrcell + 1] = size & 0xffffffff; 767 } else { 768 dma_range[3 + addrcell + 0] = size & 0xffffffff; 769 } 770 771 dma_range += (3 + addrcell + sizecell); 772 } 773 774 len = dma_range - &dma_ranges[0]; 775 if (len) 776 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); 777 778 return 0; 779 } 780 #endif 781 782 int fdt_increase_size(void *fdt, int add_len) 783 { 784 int newlen; 785 786 newlen = fdt_totalsize(fdt) + add_len; 787 788 /* Open in place with a new len */ 789 return fdt_open_into(fdt, fdt, newlen); 790 } 791 792 #ifdef CONFIG_FDT_FIXUP_PARTITIONS 793 #include <jffs2/load_kernel.h> 794 #include <mtd_node.h> 795 796 struct reg_cell { 797 unsigned int r0; 798 unsigned int r1; 799 }; 800 801 int fdt_del_subnodes(const void *blob, int parent_offset) 802 { 803 int off, ndepth; 804 int ret; 805 806 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth); 807 (off >= 0) && (ndepth > 0); 808 off = fdt_next_node(blob, off, &ndepth)) { 809 if (ndepth == 1) { 810 debug("delete %s: offset: %x\n", 811 fdt_get_name(blob, off, 0), off); 812 ret = fdt_del_node((void *)blob, off); 813 if (ret < 0) { 814 printf("Can't delete node: %s\n", 815 fdt_strerror(ret)); 816 return ret; 817 } else { 818 ndepth = 0; 819 off = parent_offset; 820 } 821 } 822 } 823 return 0; 824 } 825 826 int fdt_del_partitions(void *blob, int parent_offset) 827 { 828 const void *prop; 829 int ndepth = 0; 830 int off; 831 int ret; 832 833 off = fdt_next_node(blob, parent_offset, &ndepth); 834 if (off > 0 && ndepth == 1) { 835 prop = fdt_getprop(blob, off, "label", NULL); 836 if (prop == NULL) { 837 /* 838 * Could not find label property, nand {}; node? 839 * Check subnode, delete partitions there if any. 840 */ 841 return fdt_del_partitions(blob, off); 842 } else { 843 ret = fdt_del_subnodes(blob, parent_offset); 844 if (ret < 0) { 845 printf("Can't remove subnodes: %s\n", 846 fdt_strerror(ret)); 847 return ret; 848 } 849 } 850 } 851 return 0; 852 } 853 854 int fdt_node_set_part_info(void *blob, int parent_offset, 855 struct mtd_device *dev) 856 { 857 struct list_head *pentry; 858 struct part_info *part; 859 struct reg_cell cell; 860 int off, ndepth = 0; 861 int part_num, ret; 862 char buf[64]; 863 864 ret = fdt_del_partitions(blob, parent_offset); 865 if (ret < 0) 866 return ret; 867 868 /* 869 * Check if it is nand {}; subnode, adjust 870 * the offset in this case 871 */ 872 off = fdt_next_node(blob, parent_offset, &ndepth); 873 if (off > 0 && ndepth == 1) 874 parent_offset = off; 875 876 part_num = 0; 877 list_for_each_prev(pentry, &dev->parts) { 878 int newoff; 879 880 part = list_entry(pentry, struct part_info, link); 881 882 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", 883 part_num, part->name, part->size, 884 part->offset, part->mask_flags); 885 886 sprintf(buf, "partition@%llx", part->offset); 887 add_sub: 888 ret = fdt_add_subnode(blob, parent_offset, buf); 889 if (ret == -FDT_ERR_NOSPACE) { 890 ret = fdt_increase_size(blob, 512); 891 if (!ret) 892 goto add_sub; 893 else 894 goto err_size; 895 } else if (ret < 0) { 896 printf("Can't add partition node: %s\n", 897 fdt_strerror(ret)); 898 return ret; 899 } 900 newoff = ret; 901 902 /* Check MTD_WRITEABLE_CMD flag */ 903 if (part->mask_flags & 1) { 904 add_ro: 905 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0); 906 if (ret == -FDT_ERR_NOSPACE) { 907 ret = fdt_increase_size(blob, 512); 908 if (!ret) 909 goto add_ro; 910 else 911 goto err_size; 912 } else if (ret < 0) 913 goto err_prop; 914 } 915 916 cell.r0 = cpu_to_fdt32(part->offset); 917 cell.r1 = cpu_to_fdt32(part->size); 918 add_reg: 919 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell)); 920 if (ret == -FDT_ERR_NOSPACE) { 921 ret = fdt_increase_size(blob, 512); 922 if (!ret) 923 goto add_reg; 924 else 925 goto err_size; 926 } else if (ret < 0) 927 goto err_prop; 928 929 add_label: 930 ret = fdt_setprop_string(blob, newoff, "label", part->name); 931 if (ret == -FDT_ERR_NOSPACE) { 932 ret = fdt_increase_size(blob, 512); 933 if (!ret) 934 goto add_label; 935 else 936 goto err_size; 937 } else if (ret < 0) 938 goto err_prop; 939 940 part_num++; 941 } 942 return 0; 943 err_size: 944 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 945 return ret; 946 err_prop: 947 printf("Can't add property: %s\n", fdt_strerror(ret)); 948 return ret; 949 } 950 951 /* 952 * Update partitions in nor/nand nodes using info from 953 * mtdparts environment variable. The nodes to update are 954 * specified by node_info structure which contains mtd device 955 * type and compatible string: E. g. the board code in 956 * ft_board_setup() could use: 957 * 958 * struct node_info nodes[] = { 959 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, }, 960 * { "cfi-flash", MTD_DEV_TYPE_NOR, }, 961 * }; 962 * 963 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes)); 964 */ 965 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size) 966 { 967 struct node_info *ni = node_info; 968 struct mtd_device *dev; 969 int i, idx; 970 int noff; 971 972 if (mtdparts_init() != 0) 973 return; 974 975 for (i = 0; i < node_info_size; i++) { 976 idx = 0; 977 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat); 978 while (noff != -FDT_ERR_NOTFOUND) { 979 debug("%s: %s, mtd dev type %d\n", 980 fdt_get_name(blob, noff, 0), 981 ni[i].compat, ni[i].type); 982 dev = device_find(ni[i].type, idx++); 983 if (dev) { 984 if (fdt_node_set_part_info(blob, noff, dev)) 985 return; /* return on error */ 986 } 987 988 /* Jump to next flash node */ 989 noff = fdt_node_offset_by_compatible(blob, noff, 990 ni[i].compat); 991 } 992 } 993 } 994 #endif 995 996 void fdt_del_node_and_alias(void *blob, const char *alias) 997 { 998 int off = fdt_path_offset(blob, alias); 999 1000 if (off < 0) 1001 return; 1002 1003 fdt_del_node(blob, off); 1004 1005 off = fdt_path_offset(blob, "/aliases"); 1006 fdt_delprop(blob, off, alias); 1007 } 1008 1009 /* Max address size we deal with */ 1010 #define OF_MAX_ADDR_CELLS 4 1011 #define OF_BAD_ADDR FDT_ADDR_T_NONE 1012 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ 1013 (ns) > 0) 1014 1015 /* Debug utility */ 1016 #ifdef DEBUG 1017 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) 1018 { 1019 printf("%s", s); 1020 while(na--) 1021 printf(" %08x", *(addr++)); 1022 printf("\n"); 1023 } 1024 #else 1025 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { } 1026 #endif 1027 1028 /** 1029 * struct of_bus - Callbacks for bus specific translators 1030 * @name: A string used to identify this bus in debug output. 1031 * @addresses: The name of the DT property from which addresses are 1032 * to be read, typically "reg". 1033 * @match: Return non-zero if the node whose parent is at 1034 * parentoffset in the FDT blob corresponds to a bus 1035 * of this type, otherwise return zero. If NULL a match 1036 * is assumed. 1037 * @count_cells:Count how many cells (be32 values) a node whose parent 1038 * is at parentoffset in the FDT blob will require to 1039 * represent its address (written to *addrc) & size 1040 * (written to *sizec). 1041 * @map: Map the address addr from the address space of this 1042 * bus to that of its parent, making use of the ranges 1043 * read from DT to an array at range. na and ns are the 1044 * number of cells (be32 values) used to hold and address 1045 * or size, respectively, for this bus. pna is the number 1046 * of cells used to hold an address for the parent bus. 1047 * Returns the address in the address space of the parent 1048 * bus. 1049 * @translate: Update the value of the address cells at addr within an 1050 * FDT by adding offset to it. na specifies the number of 1051 * cells used to hold the address being translated. Returns 1052 * zero on success, non-zero on error. 1053 * 1054 * Each bus type will include a struct of_bus in the of_busses array, 1055 * providing implementations of some or all of the functions used to 1056 * match the bus & handle address translation for its children. 1057 */ 1058 struct of_bus { 1059 const char *name; 1060 const char *addresses; 1061 int (*match)(const void *blob, int parentoffset); 1062 void (*count_cells)(const void *blob, int parentoffset, 1063 int *addrc, int *sizec); 1064 u64 (*map)(fdt32_t *addr, const fdt32_t *range, 1065 int na, int ns, int pna); 1066 int (*translate)(fdt32_t *addr, u64 offset, int na); 1067 }; 1068 1069 /* Default translator (generic bus) */ 1070 void fdt_support_default_count_cells(const void *blob, int parentoffset, 1071 int *addrc, int *sizec) 1072 { 1073 const fdt32_t *prop; 1074 1075 if (addrc) 1076 *addrc = fdt_address_cells(blob, parentoffset); 1077 1078 if (sizec) { 1079 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL); 1080 if (prop) 1081 *sizec = be32_to_cpup(prop); 1082 else 1083 *sizec = 1; 1084 } 1085 } 1086 1087 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range, 1088 int na, int ns, int pna) 1089 { 1090 u64 cp, s, da; 1091 1092 cp = fdt_read_number(range, na); 1093 s = fdt_read_number(range + na + pna, ns); 1094 da = fdt_read_number(addr, na); 1095 1096 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64 1097 ", da=%" PRIu64 "\n", cp, s, da); 1098 1099 if (da < cp || da >= (cp + s)) 1100 return OF_BAD_ADDR; 1101 return da - cp; 1102 } 1103 1104 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na) 1105 { 1106 u64 a = fdt_read_number(addr, na); 1107 memset(addr, 0, na * 4); 1108 a += offset; 1109 if (na > 1) 1110 addr[na - 2] = cpu_to_fdt32(a >> 32); 1111 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu); 1112 1113 return 0; 1114 } 1115 1116 #ifdef CONFIG_OF_ISA_BUS 1117 1118 /* ISA bus translator */ 1119 static int of_bus_isa_match(const void *blob, int parentoffset) 1120 { 1121 const char *name; 1122 1123 name = fdt_get_name(blob, parentoffset, NULL); 1124 if (!name) 1125 return 0; 1126 1127 return !strcmp(name, "isa"); 1128 } 1129 1130 static void of_bus_isa_count_cells(const void *blob, int parentoffset, 1131 int *addrc, int *sizec) 1132 { 1133 if (addrc) 1134 *addrc = 2; 1135 if (sizec) 1136 *sizec = 1; 1137 } 1138 1139 static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range, 1140 int na, int ns, int pna) 1141 { 1142 u64 cp, s, da; 1143 1144 /* Check address type match */ 1145 if ((addr[0] ^ range[0]) & cpu_to_be32(1)) 1146 return OF_BAD_ADDR; 1147 1148 cp = fdt_read_number(range + 1, na - 1); 1149 s = fdt_read_number(range + na + pna, ns); 1150 da = fdt_read_number(addr + 1, na - 1); 1151 1152 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64 1153 ", da=%" PRIu64 "\n", cp, s, da); 1154 1155 if (da < cp || da >= (cp + s)) 1156 return OF_BAD_ADDR; 1157 return da - cp; 1158 } 1159 1160 static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na) 1161 { 1162 return of_bus_default_translate(addr + 1, offset, na - 1); 1163 } 1164 1165 #endif /* CONFIG_OF_ISA_BUS */ 1166 1167 /* Array of bus specific translators */ 1168 static struct of_bus of_busses[] = { 1169 #ifdef CONFIG_OF_ISA_BUS 1170 /* ISA */ 1171 { 1172 .name = "isa", 1173 .addresses = "reg", 1174 .match = of_bus_isa_match, 1175 .count_cells = of_bus_isa_count_cells, 1176 .map = of_bus_isa_map, 1177 .translate = of_bus_isa_translate, 1178 }, 1179 #endif /* CONFIG_OF_ISA_BUS */ 1180 /* Default */ 1181 { 1182 .name = "default", 1183 .addresses = "reg", 1184 .count_cells = fdt_support_default_count_cells, 1185 .map = of_bus_default_map, 1186 .translate = of_bus_default_translate, 1187 }, 1188 }; 1189 1190 static struct of_bus *of_match_bus(const void *blob, int parentoffset) 1191 { 1192 struct of_bus *bus; 1193 1194 if (ARRAY_SIZE(of_busses) == 1) 1195 return of_busses; 1196 1197 for (bus = of_busses; bus; bus++) { 1198 if (!bus->match || bus->match(blob, parentoffset)) 1199 return bus; 1200 } 1201 1202 /* 1203 * We should always have matched the default bus at least, since 1204 * it has a NULL match field. If we didn't then it somehow isn't 1205 * in the of_busses array or something equally catastrophic has 1206 * gone wrong. 1207 */ 1208 assert(0); 1209 return NULL; 1210 } 1211 1212 static int of_translate_one(const void *blob, int parent, struct of_bus *bus, 1213 struct of_bus *pbus, fdt32_t *addr, 1214 int na, int ns, int pna, const char *rprop) 1215 { 1216 const fdt32_t *ranges; 1217 int rlen; 1218 int rone; 1219 u64 offset = OF_BAD_ADDR; 1220 1221 /* Normally, an absence of a "ranges" property means we are 1222 * crossing a non-translatable boundary, and thus the addresses 1223 * below the current not cannot be converted to CPU physical ones. 1224 * Unfortunately, while this is very clear in the spec, it's not 1225 * what Apple understood, and they do have things like /uni-n or 1226 * /ht nodes with no "ranges" property and a lot of perfectly 1227 * useable mapped devices below them. Thus we treat the absence of 1228 * "ranges" as equivalent to an empty "ranges" property which means 1229 * a 1:1 translation at that level. It's up to the caller not to try 1230 * to translate addresses that aren't supposed to be translated in 1231 * the first place. --BenH. 1232 */ 1233 ranges = fdt_getprop(blob, parent, rprop, &rlen); 1234 if (ranges == NULL || rlen == 0) { 1235 offset = fdt_read_number(addr, na); 1236 memset(addr, 0, pna * 4); 1237 debug("OF: no ranges, 1:1 translation\n"); 1238 goto finish; 1239 } 1240 1241 debug("OF: walking ranges...\n"); 1242 1243 /* Now walk through the ranges */ 1244 rlen /= 4; 1245 rone = na + pna + ns; 1246 for (; rlen >= rone; rlen -= rone, ranges += rone) { 1247 offset = bus->map(addr, ranges, na, ns, pna); 1248 if (offset != OF_BAD_ADDR) 1249 break; 1250 } 1251 if (offset == OF_BAD_ADDR) { 1252 debug("OF: not found !\n"); 1253 return 1; 1254 } 1255 memcpy(addr, ranges + na, 4 * pna); 1256 1257 finish: 1258 of_dump_addr("OF: parent translation for:", addr, pna); 1259 debug("OF: with offset: %" PRIu64 "\n", offset); 1260 1261 /* Translate it into parent bus space */ 1262 return pbus->translate(addr, offset, pna); 1263 } 1264 1265 /* 1266 * Translate an address from the device-tree into a CPU physical address, 1267 * this walks up the tree and applies the various bus mappings on the 1268 * way. 1269 * 1270 * Note: We consider that crossing any level with #size-cells == 0 to mean 1271 * that translation is impossible (that is we are not dealing with a value 1272 * that can be mapped to a cpu physical address). This is not really specified 1273 * that way, but this is traditionally the way IBM at least do things 1274 */ 1275 static u64 __of_translate_address(const void *blob, int node_offset, 1276 const fdt32_t *in_addr, const char *rprop) 1277 { 1278 int parent; 1279 struct of_bus *bus, *pbus; 1280 fdt32_t addr[OF_MAX_ADDR_CELLS]; 1281 int na, ns, pna, pns; 1282 u64 result = OF_BAD_ADDR; 1283 1284 debug("OF: ** translation for device %s **\n", 1285 fdt_get_name(blob, node_offset, NULL)); 1286 1287 /* Get parent & match bus type */ 1288 parent = fdt_parent_offset(blob, node_offset); 1289 if (parent < 0) 1290 goto bail; 1291 bus = of_match_bus(blob, parent); 1292 1293 /* Cound address cells & copy address locally */ 1294 bus->count_cells(blob, parent, &na, &ns); 1295 if (!OF_CHECK_COUNTS(na, ns)) { 1296 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1297 fdt_get_name(blob, node_offset, NULL)); 1298 goto bail; 1299 } 1300 memcpy(addr, in_addr, na * 4); 1301 1302 debug("OF: bus is %s (na=%d, ns=%d) on %s\n", 1303 bus->name, na, ns, fdt_get_name(blob, parent, NULL)); 1304 of_dump_addr("OF: translating address:", addr, na); 1305 1306 /* Translate */ 1307 for (;;) { 1308 /* Switch to parent bus */ 1309 node_offset = parent; 1310 parent = fdt_parent_offset(blob, node_offset); 1311 1312 /* If root, we have finished */ 1313 if (parent < 0) { 1314 debug("OF: reached root node\n"); 1315 result = fdt_read_number(addr, na); 1316 break; 1317 } 1318 1319 /* Get new parent bus and counts */ 1320 pbus = of_match_bus(blob, parent); 1321 pbus->count_cells(blob, parent, &pna, &pns); 1322 if (!OF_CHECK_COUNTS(pna, pns)) { 1323 printf("%s: Bad cell count for %s\n", __FUNCTION__, 1324 fdt_get_name(blob, node_offset, NULL)); 1325 break; 1326 } 1327 1328 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", 1329 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL)); 1330 1331 /* Apply bus translation */ 1332 if (of_translate_one(blob, node_offset, bus, pbus, 1333 addr, na, ns, pna, rprop)) 1334 break; 1335 1336 /* Complete the move up one level */ 1337 na = pna; 1338 ns = pns; 1339 bus = pbus; 1340 1341 of_dump_addr("OF: one level translation:", addr, na); 1342 } 1343 bail: 1344 1345 return result; 1346 } 1347 1348 u64 fdt_translate_address(const void *blob, int node_offset, 1349 const fdt32_t *in_addr) 1350 { 1351 return __of_translate_address(blob, node_offset, in_addr, "ranges"); 1352 } 1353 1354 /** 1355 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and 1356 * who's reg property matches a physical cpu address 1357 * 1358 * @blob: ptr to device tree 1359 * @compat: compatiable string to match 1360 * @compat_off: property name 1361 * 1362 */ 1363 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 1364 phys_addr_t compat_off) 1365 { 1366 int len, off = fdt_node_offset_by_compatible(blob, -1, compat); 1367 while (off != -FDT_ERR_NOTFOUND) { 1368 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len); 1369 if (reg) { 1370 if (compat_off == fdt_translate_address(blob, off, reg)) 1371 return off; 1372 } 1373 off = fdt_node_offset_by_compatible(blob, off, compat); 1374 } 1375 1376 return -FDT_ERR_NOTFOUND; 1377 } 1378 1379 /** 1380 * fdt_alloc_phandle: Return next free phandle value 1381 * 1382 * @blob: ptr to device tree 1383 */ 1384 int fdt_alloc_phandle(void *blob) 1385 { 1386 int offset; 1387 uint32_t phandle = 0; 1388 1389 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0; 1390 offset = fdt_next_node(blob, offset, NULL)) { 1391 phandle = max(phandle, fdt_get_phandle(blob, offset)); 1392 } 1393 1394 return phandle + 1; 1395 } 1396 1397 /* 1398 * fdt_set_phandle: Create a phandle property for the given node 1399 * 1400 * @fdt: ptr to device tree 1401 * @nodeoffset: node to update 1402 * @phandle: phandle value to set (must be unique) 1403 */ 1404 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle) 1405 { 1406 int ret; 1407 1408 #ifdef DEBUG 1409 int off = fdt_node_offset_by_phandle(fdt, phandle); 1410 1411 if ((off >= 0) && (off != nodeoffset)) { 1412 char buf[64]; 1413 1414 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf)); 1415 printf("Trying to update node %s with phandle %u ", 1416 buf, phandle); 1417 1418 fdt_get_path(fdt, off, buf, sizeof(buf)); 1419 printf("that already exists in node %s.\n", buf); 1420 return -FDT_ERR_BADPHANDLE; 1421 } 1422 #endif 1423 1424 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle); 1425 if (ret < 0) 1426 return ret; 1427 1428 /* 1429 * For now, also set the deprecated "linux,phandle" property, so that we 1430 * don't break older kernels. 1431 */ 1432 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle); 1433 1434 return ret; 1435 } 1436 1437 /* 1438 * fdt_create_phandle: Create a phandle property for the given node 1439 * 1440 * @fdt: ptr to device tree 1441 * @nodeoffset: node to update 1442 */ 1443 unsigned int fdt_create_phandle(void *fdt, int nodeoffset) 1444 { 1445 /* see if there is a phandle already */ 1446 int phandle = fdt_get_phandle(fdt, nodeoffset); 1447 1448 /* if we got 0, means no phandle so create one */ 1449 if (phandle == 0) { 1450 int ret; 1451 1452 phandle = fdt_alloc_phandle(fdt); 1453 ret = fdt_set_phandle(fdt, nodeoffset, phandle); 1454 if (ret < 0) { 1455 printf("Can't set phandle %u: %s\n", phandle, 1456 fdt_strerror(ret)); 1457 return 0; 1458 } 1459 } 1460 1461 return phandle; 1462 } 1463 1464 /* 1465 * fdt_set_node_status: Set status for the given node 1466 * 1467 * @fdt: ptr to device tree 1468 * @nodeoffset: node to update 1469 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1470 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1471 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1472 */ 1473 int fdt_set_node_status(void *fdt, int nodeoffset, 1474 enum fdt_status status, unsigned int error_code) 1475 { 1476 char buf[16]; 1477 int ret = 0; 1478 1479 if (nodeoffset < 0) 1480 return nodeoffset; 1481 1482 switch (status) { 1483 case FDT_STATUS_OKAY: 1484 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay"); 1485 break; 1486 case FDT_STATUS_DISABLED: 1487 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled"); 1488 break; 1489 case FDT_STATUS_FAIL: 1490 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail"); 1491 break; 1492 case FDT_STATUS_FAIL_ERROR_CODE: 1493 sprintf(buf, "fail-%d", error_code); 1494 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf); 1495 break; 1496 default: 1497 printf("Invalid fdt status: %x\n", status); 1498 ret = -1; 1499 break; 1500 } 1501 1502 return ret; 1503 } 1504 1505 /* 1506 * fdt_set_status_by_alias: Set status for the given node given an alias 1507 * 1508 * @fdt: ptr to device tree 1509 * @alias: alias of node to update 1510 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, 1511 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE 1512 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE 1513 */ 1514 int fdt_set_status_by_alias(void *fdt, const char* alias, 1515 enum fdt_status status, unsigned int error_code) 1516 { 1517 int offset = fdt_path_offset(fdt, alias); 1518 1519 return fdt_set_node_status(fdt, offset, status, error_code); 1520 } 1521 1522 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD) 1523 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf) 1524 { 1525 int noff; 1526 int ret; 1527 1528 noff = fdt_node_offset_by_compatible(blob, -1, compat); 1529 if (noff != -FDT_ERR_NOTFOUND) { 1530 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat); 1531 add_edid: 1532 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128); 1533 if (ret == -FDT_ERR_NOSPACE) { 1534 ret = fdt_increase_size(blob, 512); 1535 if (!ret) 1536 goto add_edid; 1537 else 1538 goto err_size; 1539 } else if (ret < 0) { 1540 printf("Can't add property: %s\n", fdt_strerror(ret)); 1541 return ret; 1542 } 1543 } 1544 return 0; 1545 err_size: 1546 printf("Can't increase blob size: %s\n", fdt_strerror(ret)); 1547 return ret; 1548 } 1549 #endif 1550 1551 /* 1552 * Verify the physical address of device tree node for a given alias 1553 * 1554 * This function locates the device tree node of a given alias, and then 1555 * verifies that the physical address of that device matches the given 1556 * parameter. It displays a message if there is a mismatch. 1557 * 1558 * Returns 1 on success, 0 on failure 1559 */ 1560 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr) 1561 { 1562 const char *path; 1563 const fdt32_t *reg; 1564 int node, len; 1565 u64 dt_addr; 1566 1567 path = fdt_getprop(fdt, anode, alias, NULL); 1568 if (!path) { 1569 /* If there's no such alias, then it's not a failure */ 1570 return 1; 1571 } 1572 1573 node = fdt_path_offset(fdt, path); 1574 if (node < 0) { 1575 printf("Warning: device tree alias '%s' points to invalid " 1576 "node %s.\n", alias, path); 1577 return 0; 1578 } 1579 1580 reg = fdt_getprop(fdt, node, "reg", &len); 1581 if (!reg) { 1582 printf("Warning: device tree node '%s' has no address.\n", 1583 path); 1584 return 0; 1585 } 1586 1587 dt_addr = fdt_translate_address(fdt, node, reg); 1588 if (addr != dt_addr) { 1589 printf("Warning: U-Boot configured device %s at address %" 1590 PRIx64 ",\n but the device tree has it address %" 1591 PRIx64 ".\n", alias, addr, dt_addr); 1592 return 0; 1593 } 1594 1595 return 1; 1596 } 1597 1598 /* 1599 * Returns the base address of an SOC or PCI node 1600 */ 1601 u64 fdt_get_base_address(const void *fdt, int node) 1602 { 1603 int size; 1604 const fdt32_t *prop; 1605 1606 prop = fdt_getprop(fdt, node, "reg", &size); 1607 1608 return prop ? fdt_translate_address(fdt, node, prop) : 0; 1609 } 1610 1611 /* 1612 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells. 1613 */ 1614 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off, 1615 uint64_t *val, int cells) 1616 { 1617 const fdt32_t *prop32 = &prop[cell_off]; 1618 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off]; 1619 1620 if ((cell_off + cells) > prop_len) 1621 return -FDT_ERR_NOSPACE; 1622 1623 switch (cells) { 1624 case 1: 1625 *val = fdt32_to_cpu(*prop32); 1626 break; 1627 case 2: 1628 *val = fdt64_to_cpu(*prop64); 1629 break; 1630 default: 1631 return -FDT_ERR_NOSPACE; 1632 } 1633 1634 return 0; 1635 } 1636 1637 /** 1638 * fdt_read_range - Read a node's n'th range property 1639 * 1640 * @fdt: ptr to device tree 1641 * @node: offset of node 1642 * @n: range index 1643 * @child_addr: pointer to storage for the "child address" field 1644 * @addr: pointer to storage for the CPU view translated physical start 1645 * @len: pointer to storage for the range length 1646 * 1647 * Convenience function that reads and interprets a specific range out of 1648 * a number of the "ranges" property array. 1649 */ 1650 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 1651 uint64_t *addr, uint64_t *len) 1652 { 1653 int pnode = fdt_parent_offset(fdt, node); 1654 const fdt32_t *ranges; 1655 int pacells; 1656 int acells; 1657 int scells; 1658 int ranges_len; 1659 int cell = 0; 1660 int r = 0; 1661 1662 /* 1663 * The "ranges" property is an array of 1664 * { <child address> <parent address> <size in child address space> } 1665 * 1666 * All 3 elements can span a diffent number of cells. Fetch their size. 1667 */ 1668 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1); 1669 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1); 1670 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1); 1671 1672 /* Now try to get the ranges property */ 1673 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len); 1674 if (!ranges) 1675 return -FDT_ERR_NOTFOUND; 1676 ranges_len /= sizeof(uint32_t); 1677 1678 /* Jump to the n'th entry */ 1679 cell = n * (pacells + acells + scells); 1680 1681 /* Read <child address> */ 1682 if (child_addr) { 1683 r = fdt_read_prop(ranges, ranges_len, cell, child_addr, 1684 acells); 1685 if (r) 1686 return r; 1687 } 1688 cell += acells; 1689 1690 /* Read <parent address> */ 1691 if (addr) 1692 *addr = fdt_translate_address(fdt, node, ranges + cell); 1693 cell += pacells; 1694 1695 /* Read <size in child address space> */ 1696 if (len) { 1697 r = fdt_read_prop(ranges, ranges_len, cell, len, scells); 1698 if (r) 1699 return r; 1700 } 1701 1702 return 0; 1703 } 1704 1705 /** 1706 * fdt_setup_simplefb_node - Fill and enable a simplefb node 1707 * 1708 * @fdt: ptr to device tree 1709 * @node: offset of the simplefb node 1710 * @base_address: framebuffer base address 1711 * @width: width in pixels 1712 * @height: height in pixels 1713 * @stride: bytes per line 1714 * @format: pixel format string 1715 * 1716 * Convenience function to fill and enable a simplefb node. 1717 */ 1718 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 1719 u32 height, u32 stride, const char *format) 1720 { 1721 char name[32]; 1722 fdt32_t cells[4]; 1723 int i, addrc, sizec, ret; 1724 1725 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node), 1726 &addrc, &sizec); 1727 i = 0; 1728 if (addrc == 2) 1729 cells[i++] = cpu_to_fdt32(base_address >> 32); 1730 cells[i++] = cpu_to_fdt32(base_address); 1731 if (sizec == 2) 1732 cells[i++] = 0; 1733 cells[i++] = cpu_to_fdt32(height * stride); 1734 1735 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i); 1736 if (ret < 0) 1737 return ret; 1738 1739 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address); 1740 ret = fdt_set_name(fdt, node, name); 1741 if (ret < 0) 1742 return ret; 1743 1744 ret = fdt_setprop_u32(fdt, node, "width", width); 1745 if (ret < 0) 1746 return ret; 1747 1748 ret = fdt_setprop_u32(fdt, node, "height", height); 1749 if (ret < 0) 1750 return ret; 1751 1752 ret = fdt_setprop_u32(fdt, node, "stride", stride); 1753 if (ret < 0) 1754 return ret; 1755 1756 ret = fdt_setprop_string(fdt, node, "format", format); 1757 if (ret < 0) 1758 return ret; 1759 1760 ret = fdt_setprop_string(fdt, node, "status", "okay"); 1761 if (ret < 0) 1762 return ret; 1763 1764 return 0; 1765 } 1766 1767 /* 1768 * Update native-mode in display-timings from display environment variable. 1769 * The node to update are specified by path. 1770 */ 1771 int fdt_fixup_display(void *blob, const char *path, const char *display) 1772 { 1773 int off, toff; 1774 1775 if (!display || !path) 1776 return -FDT_ERR_NOTFOUND; 1777 1778 toff = fdt_path_offset(blob, path); 1779 if (toff >= 0) 1780 toff = fdt_subnode_offset(blob, toff, "display-timings"); 1781 if (toff < 0) 1782 return toff; 1783 1784 for (off = fdt_first_subnode(blob, toff); 1785 off >= 0; 1786 off = fdt_next_subnode(blob, off)) { 1787 uint32_t h = fdt_get_phandle(blob, off); 1788 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL), 1789 fdt32_to_cpu(h)); 1790 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0) 1791 return fdt_setprop_u32(blob, toff, "native-mode", h); 1792 } 1793 return toff; 1794 } 1795 1796 #ifdef CONFIG_OF_LIBFDT_OVERLAY 1797 /** 1798 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting 1799 * 1800 * @fdt: ptr to device tree 1801 * @fdto: ptr to device tree overlay 1802 * 1803 * Convenience function to apply an overlay and display helpful messages 1804 * in the case of an error 1805 */ 1806 int fdt_overlay_apply_verbose(void *fdt, void *fdto) 1807 { 1808 int err; 1809 bool has_symbols; 1810 1811 err = fdt_path_offset(fdt, "/__symbols__"); 1812 has_symbols = err >= 0; 1813 1814 err = fdt_overlay_apply(fdt, fdto); 1815 if (err < 0) { 1816 printf("failed on fdt_overlay_apply(): %s\n", 1817 fdt_strerror(err)); 1818 if (!has_symbols) { 1819 printf("base fdt does did not have a /__symbols__ node\n"); 1820 printf("make sure you've compiled with -@\n"); 1821 } 1822 } 1823 return err; 1824 } 1825 #endif 1826