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 assert(ofnode_valid(node)); 171 if (ofnode_is_np(node)) 172 return strrchr(node.np->full_name, '/') + 1; 173 174 return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL); 175 } 176 177 int ofnode_read_size(ofnode node, const char *propname) 178 { 179 int len; 180 181 if (ofnode_is_np(node)) { 182 struct property *prop = of_find_property( 183 ofnode_to_np(node), propname, NULL); 184 185 if (prop) 186 return prop->length; 187 } else { 188 if (fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname, 189 &len)) 190 return len; 191 } 192 193 return -EINVAL; 194 } 195 196 fdt_addr_t ofnode_get_addr_index(ofnode node, int index) 197 { 198 if (ofnode_is_np(node)) { 199 const __be32 *prop_val; 200 uint flags; 201 u64 size; 202 int na; 203 204 prop_val = of_get_address(ofnode_to_np(node), index, &size, 205 &flags); 206 if (!prop_val) 207 return FDT_ADDR_T_NONE; 208 na = of_n_addr_cells(ofnode_to_np(node)); 209 return of_read_number(prop_val, na); 210 } else { 211 return fdt_get_base_address(gd->fdt_blob, 212 ofnode_to_offset(node)); 213 } 214 215 return FDT_ADDR_T_NONE; 216 } 217 218 fdt_addr_t ofnode_get_addr(ofnode node) 219 { 220 return ofnode_get_addr_index(node, 0); 221 } 222 223 int ofnode_stringlist_search(ofnode node, const char *property, 224 const char *string) 225 { 226 if (ofnode_is_np(node)) { 227 return of_property_match_string(ofnode_to_np(node), 228 property, string); 229 } else { 230 int ret; 231 232 ret = fdt_stringlist_search(gd->fdt_blob, 233 ofnode_to_offset(node), property, 234 string); 235 if (ret == -FDT_ERR_NOTFOUND) 236 return -ENODATA; 237 else if (ret < 0) 238 return -EINVAL; 239 240 return ret; 241 } 242 } 243 244 int ofnode_read_string_index(ofnode node, const char *property, int index, 245 const char **outp) 246 { 247 if (ofnode_is_np(node)) { 248 return of_property_read_string_index(ofnode_to_np(node), 249 property, index, outp); 250 } else { 251 int len; 252 253 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node), 254 property, index, &len); 255 if (len < 0) 256 return -EINVAL; 257 return 0; 258 } 259 } 260 261 int ofnode_read_string_count(ofnode node, const char *property) 262 { 263 if (ofnode_is_np(node)) { 264 return of_property_count_strings(ofnode_to_np(node), property); 265 } else { 266 return fdt_stringlist_count(gd->fdt_blob, 267 ofnode_to_offset(node), property); 268 } 269 } 270 271 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in, 272 struct ofnode_phandle_args *out) 273 { 274 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); 275 out->node = offset_to_ofnode(in->node); 276 out->args_count = in->args_count; 277 memcpy(out->args, in->args, sizeof(out->args)); 278 } 279 280 static void ofnode_from_of_phandle_args(struct of_phandle_args *in, 281 struct ofnode_phandle_args *out) 282 { 283 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); 284 out->node = np_to_ofnode(in->np); 285 out->args_count = in->args_count; 286 memcpy(out->args, in->args, sizeof(out->args)); 287 } 288 289 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name, 290 const char *cells_name, int cell_count, 291 int index, 292 struct ofnode_phandle_args *out_args) 293 { 294 if (ofnode_is_np(node)) { 295 struct of_phandle_args args; 296 int ret; 297 298 ret = of_parse_phandle_with_args(ofnode_to_np(node), 299 list_name, cells_name, index, &args); 300 if (ret) 301 return ret; 302 ofnode_from_of_phandle_args(&args, out_args); 303 } else { 304 struct fdtdec_phandle_args args; 305 int ret; 306 307 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, 308 ofnode_to_offset(node), list_name, cells_name, 309 cell_count, index, &args); 310 if (ret) 311 return ret; 312 ofnode_from_fdtdec_phandle_args(&args, out_args); 313 } 314 315 return 0; 316 } 317 318 int ofnode_count_phandle_with_args(ofnode node, const char *list_name, 319 const char *cells_name) 320 { 321 if (ofnode_is_np(node)) 322 return of_count_phandle_with_args(ofnode_to_np(node), 323 list_name, cells_name); 324 else 325 return fdtdec_parse_phandle_with_args(gd->fdt_blob, 326 ofnode_to_offset(node), list_name, cells_name, 327 0, -1, NULL); 328 } 329 330 ofnode ofnode_path(const char *path) 331 { 332 if (of_live_active()) 333 return np_to_ofnode(of_find_node_by_path(path)); 334 else 335 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path)); 336 } 337 338 const char *ofnode_get_chosen_prop(const char *name) 339 { 340 ofnode chosen_node; 341 342 chosen_node = ofnode_path("/chosen"); 343 344 return ofnode_read_string(chosen_node, name); 345 } 346 347 ofnode ofnode_get_chosen_node(const char *name) 348 { 349 const char *prop; 350 351 prop = ofnode_get_chosen_prop(name); 352 if (!prop) 353 return ofnode_null(); 354 355 return ofnode_path(prop); 356 } 357 358 static int decode_timing_property(ofnode node, const char *name, 359 struct timing_entry *result) 360 { 361 int length, ret = 0; 362 363 length = ofnode_read_size(node, name); 364 if (length < 0) { 365 debug("%s: could not find property %s\n", 366 ofnode_get_name(node), name); 367 return length; 368 } 369 370 if (length == sizeof(u32)) { 371 result->typ = ofnode_read_u32_default(node, name, 0); 372 result->min = result->typ; 373 result->max = result->typ; 374 } else { 375 ret = ofnode_read_u32_array(node, name, &result->min, 3); 376 } 377 378 return ret; 379 } 380 381 int ofnode_decode_display_timing(ofnode parent, int index, 382 struct display_timing *dt) 383 { 384 int i; 385 ofnode timings, node; 386 u32 val = 0; 387 int ret = 0; 388 389 timings = ofnode_find_subnode(parent, "display-timings"); 390 if (!ofnode_valid(timings)) 391 return -EINVAL; 392 393 i = 0; 394 ofnode_for_each_subnode(node, timings) { 395 if (i++ == index) 396 break; 397 } 398 399 if (!ofnode_valid(node)) 400 return -EINVAL; 401 402 memset(dt, 0, sizeof(*dt)); 403 404 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch); 405 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch); 406 ret |= decode_timing_property(node, "hactive", &dt->hactive); 407 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len); 408 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch); 409 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch); 410 ret |= decode_timing_property(node, "vactive", &dt->vactive); 411 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len); 412 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock); 413 414 dt->flags = 0; 415 val = ofnode_read_u32_default(node, "vsync-active", -1); 416 if (val != -1) { 417 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 418 DISPLAY_FLAGS_VSYNC_LOW; 419 } 420 val = ofnode_read_u32_default(node, "hsync-active", -1); 421 if (val != -1) { 422 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 423 DISPLAY_FLAGS_HSYNC_LOW; 424 } 425 val = ofnode_read_u32_default(node, "de-active", -1); 426 if (val != -1) { 427 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 428 DISPLAY_FLAGS_DE_LOW; 429 } 430 val = ofnode_read_u32_default(node, "pixelclk-active", -1); 431 if (val != -1) { 432 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 433 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 434 } 435 436 if (ofnode_read_bool(node, "interlaced")) 437 dt->flags |= DISPLAY_FLAGS_INTERLACED; 438 if (ofnode_read_bool(node, "doublescan")) 439 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 440 if (ofnode_read_bool(node, "doubleclk")) 441 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 442 443 return ret; 444 } 445 446 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp) 447 { 448 if (ofnode_is_np(node)) 449 return of_get_property(ofnode_to_np(node), propname, lenp); 450 else 451 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), 452 propname, lenp); 453 } 454 455 bool ofnode_is_available(ofnode node) 456 { 457 if (ofnode_is_np(node)) 458 return of_device_is_available(ofnode_to_np(node)); 459 else 460 return fdtdec_get_is_enabled(gd->fdt_blob, 461 ofnode_to_offset(node)); 462 } 463 464 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property, 465 fdt_size_t *sizep) 466 { 467 if (ofnode_is_np(node)) { 468 int na, ns; 469 int psize; 470 const struct device_node *np = ofnode_to_np(node); 471 const __be32 *prop = of_get_property(np, "reg", &psize); 472 473 na = of_n_addr_cells(np); 474 ns = of_n_addr_cells(np); 475 *sizep = of_read_number(prop + na, ns); 476 return of_read_number(prop, na); 477 } else { 478 return fdtdec_get_addr_size(gd->fdt_blob, 479 ofnode_to_offset(node), property, 480 sizep); 481 } 482 } 483 484 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname, 485 size_t sz) 486 { 487 if (ofnode_is_np(node)) { 488 const struct device_node *np = ofnode_to_np(node); 489 int psize; 490 const __be32 *prop = of_get_property(np, propname, &psize); 491 492 if (!prop || sz != psize) 493 return NULL; 494 return (uint8_t *)prop; 495 496 } else { 497 return fdtdec_locate_byte_array(gd->fdt_blob, 498 ofnode_to_offset(node), propname, sz); 499 } 500 } 501 502 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type, 503 const char *propname, struct fdt_pci_addr *addr) 504 { 505 const fdt32_t *cell; 506 int len; 507 int ret = -ENOENT; 508 509 debug("%s: %s: ", __func__, propname); 510 511 /* 512 * If we follow the pci bus bindings strictly, we should check 513 * the value of the node's parent node's #address-cells and 514 * #size-cells. They need to be 3 and 2 accordingly. However, 515 * for simplicity we skip the check here. 516 */ 517 cell = ofnode_get_property(node, propname, &len); 518 if (!cell) 519 goto fail; 520 521 if ((len % FDT_PCI_REG_SIZE) == 0) { 522 int num = len / FDT_PCI_REG_SIZE; 523 int i; 524 525 for (i = 0; i < num; i++) { 526 debug("pci address #%d: %08lx %08lx %08lx\n", i, 527 (ulong)fdt32_to_cpu(cell[0]), 528 (ulong)fdt32_to_cpu(cell[1]), 529 (ulong)fdt32_to_cpu(cell[2])); 530 if ((fdt32_to_cpu(*cell) & type) == type) { 531 addr->phys_hi = fdt32_to_cpu(cell[0]); 532 addr->phys_mid = fdt32_to_cpu(cell[1]); 533 addr->phys_lo = fdt32_to_cpu(cell[1]); 534 break; 535 } else { 536 cell += (FDT_PCI_ADDR_CELLS + 537 FDT_PCI_SIZE_CELLS); 538 } 539 } 540 541 if (i == num) { 542 ret = -ENXIO; 543 goto fail; 544 } 545 546 return 0; 547 } else { 548 ret = -EINVAL; 549 } 550 551 fail: 552 debug("(not found)\n"); 553 return ret; 554 } 555 556 int ofnode_read_addr_cells(ofnode node) 557 { 558 if (ofnode_is_np(node)) 559 return of_n_addr_cells(ofnode_to_np(node)); 560 else /* NOTE: this call should walk up the parent stack */ 561 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); 562 } 563 564 int ofnode_read_size_cells(ofnode node) 565 { 566 if (ofnode_is_np(node)) 567 return of_n_size_cells(ofnode_to_np(node)); 568 else /* NOTE: this call should walk up the parent stack */ 569 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); 570 } 571 572 int ofnode_read_simple_addr_cells(ofnode node) 573 { 574 if (ofnode_is_np(node)) 575 return of_simple_addr_cells(ofnode_to_np(node)); 576 else 577 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); 578 } 579 580 int ofnode_read_simple_size_cells(ofnode node) 581 { 582 if (ofnode_is_np(node)) 583 return of_simple_size_cells(ofnode_to_np(node)); 584 else 585 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); 586 } 587 588 bool ofnode_pre_reloc(ofnode node) 589 { 590 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc")) 591 return true; 592 593 #ifdef CONFIG_TPL_BUILD 594 if (ofnode_read_bool(node, "u-boot,dm-tpl")) 595 return true; 596 #elif defined(CONFIG_SPL_BUILD) 597 if (ofnode_read_bool(node, "u-boot,dm-spl")) 598 return true; 599 #else 600 /* 601 * In regular builds individual spl and tpl handling both 602 * count as handled pre-relocation for later second init. 603 */ 604 if (ofnode_read_bool(node, "u-boot,dm-spl") || 605 ofnode_read_bool(node, "u-boot,dm-tpl")) 606 return true; 607 #endif 608 609 return false; 610 } 611 612 int ofnode_read_resource(ofnode node, uint index, struct resource *res) 613 { 614 if (ofnode_is_np(node)) { 615 return of_address_to_resource(ofnode_to_np(node), index, res); 616 } else { 617 struct fdt_resource fres; 618 int ret; 619 620 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node), 621 "reg", index, &fres); 622 if (ret < 0) 623 return -EINVAL; 624 memset(res, '\0', sizeof(*res)); 625 res->start = fres.start; 626 res->end = fres.end; 627 628 return 0; 629 } 630 } 631 632 int ofnode_read_resource_byname(ofnode node, const char *name, 633 struct resource *res) 634 { 635 int index; 636 637 index = ofnode_stringlist_search(node, "reg-names", name); 638 if (index < 0) 639 return index; 640 641 return ofnode_read_resource(node, index, res); 642 } 643