1 /* 2 * Copyright (c) 2017 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <dm.h> 10 #include <fdtdec.h> 11 #include <fdt_support.h> 12 #include <libfdt.h> 13 #include <dm/of_access.h> 14 #include <dm/of_addr.h> 15 #include <dm/ofnode.h> 16 #include <linux/err.h> 17 #include <linux/ioport.h> 18 19 int ofnode_read_u32(ofnode node, const char *propname, u32 *outp) 20 { 21 assert(ofnode_valid(node)); 22 debug("%s: %s: ", __func__, propname); 23 24 if (ofnode_is_np(node)) { 25 return of_read_u32(ofnode_to_np(node), propname, outp); 26 } else { 27 const fdt32_t *cell; 28 int len; 29 30 cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), 31 propname, &len); 32 if (!cell || len < sizeof(int)) { 33 debug("(not found)\n"); 34 return -EINVAL; 35 } 36 *outp = fdt32_to_cpu(cell[0]); 37 } 38 debug("%#x (%d)\n", *outp, *outp); 39 40 return 0; 41 } 42 43 int ofnode_read_u32_default(ofnode node, const char *propname, u32 def) 44 { 45 assert(ofnode_valid(node)); 46 ofnode_read_u32(node, propname, &def); 47 48 return def; 49 } 50 51 int ofnode_read_s32_default(ofnode node, const char *propname, s32 def) 52 { 53 assert(ofnode_valid(node)); 54 ofnode_read_u32(node, propname, (u32 *)&def); 55 56 return def; 57 } 58 59 bool ofnode_read_bool(ofnode node, const char *propname) 60 { 61 const void *prop; 62 63 assert(ofnode_valid(node)); 64 debug("%s: %s: ", __func__, propname); 65 66 prop = ofnode_get_property(node, propname, NULL); 67 68 debug("%s\n", prop ? "true" : "false"); 69 70 return prop ? true : false; 71 } 72 73 const char *ofnode_read_string(ofnode node, const char *propname) 74 { 75 const char *str = NULL; 76 int len = -1; 77 78 assert(ofnode_valid(node)); 79 debug("%s: %s: ", __func__, propname); 80 81 if (ofnode_is_np(node)) { 82 struct property *prop = of_find_property( 83 ofnode_to_np(node), propname, NULL); 84 85 if (prop) { 86 str = prop->value; 87 len = prop->length; 88 } 89 } else { 90 str = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), 91 propname, &len); 92 } 93 if (!str) { 94 debug("<not found>\n"); 95 return NULL; 96 } 97 if (strnlen(str, len) >= len) { 98 debug("<invalid>\n"); 99 return NULL; 100 } 101 debug("%s\n", str); 102 103 return str; 104 } 105 106 ofnode ofnode_find_subnode(ofnode node, const char *subnode_name) 107 { 108 ofnode subnode; 109 110 assert(ofnode_valid(node)); 111 debug("%s: %s: ", __func__, subnode_name); 112 113 if (ofnode_is_np(node)) { 114 const struct device_node *np = ofnode_to_np(node); 115 116 for (np = np->child; np; np = np->sibling) { 117 if (!strcmp(subnode_name, np->name)) 118 break; 119 } 120 subnode = np_to_ofnode(np); 121 } else { 122 int ooffset = fdt_subnode_offset(gd->fdt_blob, 123 ofnode_to_offset(node), subnode_name); 124 subnode = offset_to_ofnode(ooffset); 125 } 126 debug("%s\n", ofnode_valid(subnode) ? 127 ofnode_get_name(subnode) : "<none>"); 128 129 return subnode; 130 } 131 132 int ofnode_read_u32_array(ofnode node, const char *propname, 133 u32 *out_values, size_t sz) 134 { 135 assert(ofnode_valid(node)); 136 debug("%s: %s: ", __func__, propname); 137 138 if (ofnode_is_np(node)) { 139 return of_read_u32_array(ofnode_to_np(node), propname, 140 out_values, sz); 141 } else { 142 return fdtdec_get_int_array(gd->fdt_blob, 143 ofnode_to_offset(node), propname, 144 out_values, sz); 145 } 146 } 147 148 ofnode ofnode_first_subnode(ofnode node) 149 { 150 assert(ofnode_valid(node)); 151 if (ofnode_is_np(node)) 152 return np_to_ofnode(node.np->child); 153 154 return offset_to_ofnode( 155 fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node))); 156 } 157 158 ofnode ofnode_next_subnode(ofnode node) 159 { 160 assert(ofnode_valid(node)); 161 if (ofnode_is_np(node)) 162 return np_to_ofnode(node.np->sibling); 163 164 return offset_to_ofnode( 165 fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node))); 166 } 167 168 const char *ofnode_get_name(ofnode node) 169 { 170 if(!ofnode_valid(node)){ 171 debug("%s node not valid\n", __func__); 172 return NULL; 173 } 174 if (ofnode_is_np(node)) 175 return strrchr(node.np->full_name, '/') + 1; 176 177 return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL); 178 } 179 180 ofnode ofnode_get_by_phandle(uint phandle) 181 { 182 ofnode node; 183 184 if (of_live_active()) 185 node = np_to_ofnode(of_find_node_by_phandle(phandle)); 186 else 187 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob, 188 phandle); 189 190 return node; 191 } 192 193 int ofnode_read_size(ofnode node, const char *propname) 194 { 195 int len; 196 197 if (ofnode_is_np(node)) { 198 struct property *prop = of_find_property( 199 ofnode_to_np(node), propname, NULL); 200 201 if (prop) 202 return prop->length; 203 } else { 204 if (fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname, 205 &len)) 206 return len; 207 } 208 209 return -EINVAL; 210 } 211 212 fdt_addr_t ofnode_get_addr_index(ofnode node, int index) 213 { 214 if (ofnode_is_np(node)) { 215 const __be32 *prop_val; 216 uint flags; 217 u64 size; 218 int na; 219 220 prop_val = of_get_address(ofnode_to_np(node), index, &size, 221 &flags); 222 if (!prop_val) 223 return FDT_ADDR_T_NONE; 224 na = of_n_addr_cells(ofnode_to_np(node)); 225 return of_read_number(prop_val, na); 226 } else { 227 return fdt_get_base_address(gd->fdt_blob, 228 ofnode_to_offset(node)); 229 } 230 231 return FDT_ADDR_T_NONE; 232 } 233 234 fdt_addr_t ofnode_get_addr(ofnode node) 235 { 236 return ofnode_get_addr_index(node, 0); 237 } 238 239 int ofnode_stringlist_search(ofnode node, const char *property, 240 const char *string) 241 { 242 if (ofnode_is_np(node)) { 243 return of_property_match_string(ofnode_to_np(node), 244 property, string); 245 } else { 246 int ret; 247 248 ret = fdt_stringlist_search(gd->fdt_blob, 249 ofnode_to_offset(node), property, 250 string); 251 if (ret == -FDT_ERR_NOTFOUND) 252 return -ENODATA; 253 else if (ret < 0) 254 return -EINVAL; 255 256 return ret; 257 } 258 } 259 260 int ofnode_read_string_index(ofnode node, const char *property, int index, 261 const char **outp) 262 { 263 if (ofnode_is_np(node)) { 264 return of_property_read_string_index(ofnode_to_np(node), 265 property, index, outp); 266 } else { 267 int len; 268 269 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node), 270 property, index, &len); 271 if (len < 0) 272 return -EINVAL; 273 return 0; 274 } 275 } 276 277 int ofnode_read_string_count(ofnode node, const char *property) 278 { 279 if (ofnode_is_np(node)) { 280 return of_property_count_strings(ofnode_to_np(node), property); 281 } else { 282 return fdt_stringlist_count(gd->fdt_blob, 283 ofnode_to_offset(node), property); 284 } 285 } 286 287 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in, 288 struct ofnode_phandle_args *out) 289 { 290 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); 291 out->node = offset_to_ofnode(in->node); 292 out->args_count = in->args_count; 293 memcpy(out->args, in->args, sizeof(out->args)); 294 } 295 296 static void ofnode_from_of_phandle_args(struct of_phandle_args *in, 297 struct ofnode_phandle_args *out) 298 { 299 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); 300 out->node = np_to_ofnode(in->np); 301 out->args_count = in->args_count; 302 memcpy(out->args, in->args, sizeof(out->args)); 303 } 304 305 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name, 306 const char *cells_name, int cell_count, 307 int index, 308 struct ofnode_phandle_args *out_args) 309 { 310 if (ofnode_is_np(node)) { 311 struct of_phandle_args args; 312 int ret; 313 314 ret = of_parse_phandle_with_args(ofnode_to_np(node), 315 list_name, cells_name, index, &args); 316 if (ret) 317 return ret; 318 ofnode_from_of_phandle_args(&args, out_args); 319 } else { 320 struct fdtdec_phandle_args args; 321 int ret; 322 323 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, 324 ofnode_to_offset(node), list_name, cells_name, 325 cell_count, index, &args); 326 if (ret) 327 return ret; 328 ofnode_from_fdtdec_phandle_args(&args, out_args); 329 } 330 331 return 0; 332 } 333 334 int ofnode_count_phandle_with_args(ofnode node, const char *list_name, 335 const char *cells_name) 336 { 337 if (ofnode_is_np(node)) 338 return of_count_phandle_with_args(ofnode_to_np(node), 339 list_name, cells_name); 340 else 341 return fdtdec_parse_phandle_with_args(gd->fdt_blob, 342 ofnode_to_offset(node), list_name, cells_name, 343 0, -1, NULL); 344 } 345 346 ofnode ofnode_path(const char *path) 347 { 348 if (of_live_active()) 349 return np_to_ofnode(of_find_node_by_path(path)); 350 else 351 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path)); 352 } 353 354 const char *ofnode_get_chosen_prop(const char *name) 355 { 356 ofnode chosen_node; 357 358 chosen_node = ofnode_path("/chosen"); 359 360 return ofnode_read_string(chosen_node, name); 361 } 362 363 ofnode ofnode_get_chosen_node(const char *name) 364 { 365 const char *prop; 366 367 prop = ofnode_get_chosen_prop(name); 368 if (!prop) 369 return ofnode_null(); 370 371 return ofnode_path(prop); 372 } 373 374 static int decode_timing_property(ofnode node, const char *name, 375 struct timing_entry *result) 376 { 377 int length, ret = 0; 378 379 length = ofnode_read_size(node, name); 380 if (length < 0) { 381 debug("%s: could not find property %s\n", 382 ofnode_get_name(node), name); 383 return length; 384 } 385 386 if (length == sizeof(u32)) { 387 result->typ = ofnode_read_u32_default(node, name, 0); 388 result->min = result->typ; 389 result->max = result->typ; 390 } else { 391 ret = ofnode_read_u32_array(node, name, &result->min, 3); 392 } 393 394 return ret; 395 } 396 397 int ofnode_decode_display_timing(ofnode parent, int index, 398 struct display_timing *dt) 399 { 400 int i; 401 ofnode timings, node; 402 u32 val = 0; 403 int ret = 0; 404 405 timings = ofnode_find_subnode(parent, "display-timings"); 406 if (!ofnode_valid(timings)) 407 return -EINVAL; 408 409 i = 0; 410 ofnode_for_each_subnode(node, timings) { 411 if (i++ == index) 412 break; 413 } 414 415 if (!ofnode_valid(node)) 416 return -EINVAL; 417 418 memset(dt, 0, sizeof(*dt)); 419 420 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch); 421 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch); 422 ret |= decode_timing_property(node, "hactive", &dt->hactive); 423 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len); 424 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch); 425 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch); 426 ret |= decode_timing_property(node, "vactive", &dt->vactive); 427 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len); 428 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock); 429 430 dt->flags = 0; 431 val = ofnode_read_u32_default(node, "vsync-active", -1); 432 if (val != -1) { 433 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 434 DISPLAY_FLAGS_VSYNC_LOW; 435 } 436 val = ofnode_read_u32_default(node, "hsync-active", -1); 437 if (val != -1) { 438 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 439 DISPLAY_FLAGS_HSYNC_LOW; 440 } 441 val = ofnode_read_u32_default(node, "de-active", -1); 442 if (val != -1) { 443 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 444 DISPLAY_FLAGS_DE_LOW; 445 } 446 val = ofnode_read_u32_default(node, "pixelclk-active", -1); 447 if (val != -1) { 448 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 449 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 450 } 451 452 if (ofnode_read_bool(node, "interlaced")) 453 dt->flags |= DISPLAY_FLAGS_INTERLACED; 454 if (ofnode_read_bool(node, "doublescan")) 455 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 456 if (ofnode_read_bool(node, "doubleclk")) 457 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 458 459 return ret; 460 } 461 462 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp) 463 { 464 if (ofnode_is_np(node)) 465 return of_get_property(ofnode_to_np(node), propname, lenp); 466 else 467 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), 468 propname, lenp); 469 } 470 471 bool ofnode_is_available(ofnode node) 472 { 473 if (ofnode_is_np(node)) 474 return of_device_is_available(ofnode_to_np(node)); 475 else 476 return fdtdec_get_is_enabled(gd->fdt_blob, 477 ofnode_to_offset(node)); 478 } 479 480 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property, 481 fdt_size_t *sizep) 482 { 483 if (ofnode_is_np(node)) { 484 int na, ns; 485 int psize; 486 const struct device_node *np = ofnode_to_np(node); 487 const __be32 *prop = of_get_property(np, property, &psize); 488 489 if (!prop) 490 return FDT_ADDR_T_NONE; 491 na = of_n_addr_cells(np); 492 ns = of_n_addr_cells(np); 493 *sizep = of_read_number(prop + na, ns); 494 return of_read_number(prop, na); 495 } else { 496 return fdtdec_get_addr_size(gd->fdt_blob, 497 ofnode_to_offset(node), property, 498 sizep); 499 } 500 } 501 502 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname, 503 size_t sz) 504 { 505 if (ofnode_is_np(node)) { 506 const struct device_node *np = ofnode_to_np(node); 507 int psize; 508 const __be32 *prop = of_get_property(np, propname, &psize); 509 510 if (!prop || sz != psize) 511 return NULL; 512 return (uint8_t *)prop; 513 514 } else { 515 return fdtdec_locate_byte_array(gd->fdt_blob, 516 ofnode_to_offset(node), propname, sz); 517 } 518 } 519 520 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type, 521 const char *propname, struct fdt_pci_addr *addr) 522 { 523 const fdt32_t *cell; 524 int len; 525 int ret = -ENOENT; 526 527 debug("%s: %s: ", __func__, propname); 528 529 /* 530 * If we follow the pci bus bindings strictly, we should check 531 * the value of the node's parent node's #address-cells and 532 * #size-cells. They need to be 3 and 2 accordingly. However, 533 * for simplicity we skip the check here. 534 */ 535 cell = ofnode_get_property(node, propname, &len); 536 if (!cell) 537 goto fail; 538 539 if ((len % FDT_PCI_REG_SIZE) == 0) { 540 int num = len / FDT_PCI_REG_SIZE; 541 int i; 542 543 for (i = 0; i < num; i++) { 544 debug("pci address #%d: %08lx %08lx %08lx\n", i, 545 (ulong)fdt32_to_cpu(cell[0]), 546 (ulong)fdt32_to_cpu(cell[1]), 547 (ulong)fdt32_to_cpu(cell[2])); 548 if ((fdt32_to_cpu(*cell) & type) == type) { 549 addr->phys_hi = fdt32_to_cpu(cell[0]); 550 addr->phys_mid = fdt32_to_cpu(cell[1]); 551 addr->phys_lo = fdt32_to_cpu(cell[1]); 552 break; 553 } else { 554 cell += (FDT_PCI_ADDR_CELLS + 555 FDT_PCI_SIZE_CELLS); 556 } 557 } 558 559 if (i == num) { 560 ret = -ENXIO; 561 goto fail; 562 } 563 564 return 0; 565 } else { 566 ret = -EINVAL; 567 } 568 569 fail: 570 debug("(not found)\n"); 571 return ret; 572 } 573 574 int ofnode_read_addr_cells(ofnode node) 575 { 576 if (ofnode_is_np(node)) 577 return of_n_addr_cells(ofnode_to_np(node)); 578 else /* NOTE: this call should walk up the parent stack */ 579 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); 580 } 581 582 int ofnode_read_size_cells(ofnode node) 583 { 584 if (ofnode_is_np(node)) 585 return of_n_size_cells(ofnode_to_np(node)); 586 else /* NOTE: this call should walk up the parent stack */ 587 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); 588 } 589 590 int ofnode_read_simple_addr_cells(ofnode node) 591 { 592 if (ofnode_is_np(node)) 593 return of_simple_addr_cells(ofnode_to_np(node)); 594 else 595 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); 596 } 597 598 int ofnode_read_simple_size_cells(ofnode node) 599 { 600 if (ofnode_is_np(node)) 601 return of_simple_size_cells(ofnode_to_np(node)); 602 else 603 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); 604 } 605 606 bool ofnode_pre_reloc(ofnode node) 607 { 608 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc")) 609 return true; 610 611 #ifdef CONFIG_TPL_BUILD 612 if (ofnode_read_bool(node, "u-boot,dm-tpl")) 613 return true; 614 #elif defined(CONFIG_SPL_BUILD) 615 if (ofnode_read_bool(node, "u-boot,dm-spl")) 616 return true; 617 #else 618 /* 619 * In regular builds individual spl and tpl handling both 620 * count as handled pre-relocation for later second init. 621 */ 622 if (ofnode_read_bool(node, "u-boot,dm-spl") || 623 ofnode_read_bool(node, "u-boot,dm-tpl")) 624 return true; 625 #endif 626 627 return false; 628 } 629 630 int ofnode_read_resource(ofnode node, uint index, struct resource *res) 631 { 632 if (ofnode_is_np(node)) { 633 return of_address_to_resource(ofnode_to_np(node), index, res); 634 } else { 635 struct fdt_resource fres; 636 int ret; 637 638 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node), 639 "reg", index, &fres); 640 if (ret < 0) 641 return -EINVAL; 642 memset(res, '\0', sizeof(*res)); 643 res->start = fres.start; 644 res->end = fres.end; 645 646 return 0; 647 } 648 } 649 650 int ofnode_read_resource_byname(ofnode node, const char *name, 651 struct resource *res) 652 { 653 int index; 654 655 index = ofnode_stringlist_search(node, "reg-names", name); 656 if (index < 0) 657 return index; 658 659 return ofnode_read_resource(node, index, res); 660 } 661