1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * SPDX-License-Identifier: GPL-2.0+ 4 */ 5 6 #ifndef USE_HOSTCC 7 #include <common.h> 8 #include <errno.h> 9 #include <serial.h> 10 #include <libfdt.h> 11 #include <fdtdec.h> 12 #include <asm/sections.h> 13 #include <linux/ctype.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 /* 18 * Here are the type we know about. One day we might allow drivers to 19 * register. For now we just put them here. The COMPAT macro allows us to 20 * turn this into a sparse list later, and keeps the ID with the name. 21 */ 22 #define COMPAT(id, name) name 23 static const char * const compat_names[COMPAT_COUNT] = { 24 COMPAT(UNKNOWN, "<none>"), 25 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), 26 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), 27 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), 28 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), 29 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"), 30 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"), 31 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"), 32 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), 33 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"), 34 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), 35 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), 36 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), 37 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 38 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 39 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 40 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 41 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 42 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 43 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 44 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 45 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 46 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 47 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 48 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 49 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 50 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 51 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 52 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 53 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 54 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 55 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 56 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 57 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 58 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 59 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 60 COMPAT(INTEL_MICROCODE, "intel,microcode"), 61 COMPAT(MEMORY_SPD, "memory-spd"), 62 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 63 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 64 COMPAT(INTEL_GMA, "intel,gma"), 65 COMPAT(AMS_AS3722, "ams,as3722"), 66 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 67 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 68 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 69 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 70 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 71 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 72 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 73 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 74 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"), 75 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 76 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 77 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"), 78 }; 79 80 const char *fdtdec_get_compatible(enum fdt_compat_id id) 81 { 82 /* We allow reading of the 'unknown' ID for testing purposes */ 83 assert(id >= 0 && id < COMPAT_COUNT); 84 return compat_names[id]; 85 } 86 87 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 88 const char *prop_name, int index, int na, int ns, 89 fdt_size_t *sizep) 90 { 91 const fdt32_t *prop, *prop_end; 92 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 93 int len; 94 fdt_addr_t addr; 95 96 debug("%s: %s: ", __func__, prop_name); 97 98 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 99 debug("(na too large for fdt_addr_t type)\n"); 100 return FDT_ADDR_T_NONE; 101 } 102 103 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 104 debug("(ns too large for fdt_size_t type)\n"); 105 return FDT_ADDR_T_NONE; 106 } 107 108 prop = fdt_getprop(blob, node, prop_name, &len); 109 if (!prop) { 110 debug("(not found)\n"); 111 return FDT_ADDR_T_NONE; 112 } 113 prop_end = prop + (len / sizeof(*prop)); 114 115 prop_addr = prop + (index * (na + ns)); 116 prop_size = prop_addr + na; 117 prop_after_size = prop_size + ns; 118 if (prop_after_size > prop_end) { 119 debug("(not enough data: expected >= %d cells, got %d cells)\n", 120 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 121 return FDT_ADDR_T_NONE; 122 } 123 124 addr = fdtdec_get_number(prop_addr, na); 125 126 if (sizep) { 127 *sizep = fdtdec_get_number(prop_size, ns); 128 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep); 129 } else { 130 debug("addr=%08llx\n", (u64)addr); 131 } 132 133 return addr; 134 } 135 136 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 137 int node, const char *prop_name, int index, fdt_size_t *sizep) 138 { 139 int na, ns; 140 141 debug("%s: ", __func__); 142 143 na = fdt_address_cells(blob, parent); 144 if (na < 1) { 145 debug("(bad #address-cells)\n"); 146 return FDT_ADDR_T_NONE; 147 } 148 149 ns = fdt_size_cells(blob, parent); 150 if (ns < 0) { 151 debug("(bad #size-cells)\n"); 152 return FDT_ADDR_T_NONE; 153 } 154 155 debug("na=%d, ns=%d, ", na, ns); 156 157 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 158 ns, sizep); 159 } 160 161 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 162 const char *prop_name, int index, fdt_size_t *sizep) 163 { 164 int parent; 165 166 debug("%s: ", __func__); 167 168 parent = fdt_parent_offset(blob, node); 169 if (parent < 0) { 170 debug("(no parent found)\n"); 171 return FDT_ADDR_T_NONE; 172 } 173 174 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 175 index, sizep); 176 } 177 178 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 179 const char *prop_name, fdt_size_t *sizep) 180 { 181 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 182 183 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 184 sizeof(fdt_addr_t) / sizeof(fdt32_t), 185 ns, sizep); 186 } 187 188 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 189 const char *prop_name) 190 { 191 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 192 } 193 194 #ifdef CONFIG_PCI 195 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 196 const char *prop_name, struct fdt_pci_addr *addr) 197 { 198 const u32 *cell; 199 int len; 200 int ret = -ENOENT; 201 202 debug("%s: %s: ", __func__, prop_name); 203 204 /* 205 * If we follow the pci bus bindings strictly, we should check 206 * the value of the node's parent node's #address-cells and 207 * #size-cells. They need to be 3 and 2 accordingly. However, 208 * for simplicity we skip the check here. 209 */ 210 cell = fdt_getprop(blob, node, prop_name, &len); 211 if (!cell) 212 goto fail; 213 214 if ((len % FDT_PCI_REG_SIZE) == 0) { 215 int num = len / FDT_PCI_REG_SIZE; 216 int i; 217 218 for (i = 0; i < num; i++) { 219 debug("pci address #%d: %08lx %08lx %08lx\n", i, 220 (ulong)fdt32_to_cpu(cell[0]), 221 (ulong)fdt32_to_cpu(cell[1]), 222 (ulong)fdt32_to_cpu(cell[2])); 223 if ((fdt32_to_cpu(*cell) & type) == type) { 224 addr->phys_hi = fdt32_to_cpu(cell[0]); 225 addr->phys_mid = fdt32_to_cpu(cell[1]); 226 addr->phys_lo = fdt32_to_cpu(cell[1]); 227 break; 228 } else { 229 cell += (FDT_PCI_ADDR_CELLS + 230 FDT_PCI_SIZE_CELLS); 231 } 232 } 233 234 if (i == num) { 235 ret = -ENXIO; 236 goto fail; 237 } 238 239 return 0; 240 } else { 241 ret = -EINVAL; 242 } 243 244 fail: 245 debug("(not found)\n"); 246 return ret; 247 } 248 249 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 250 { 251 const char *list, *end; 252 int len; 253 254 list = fdt_getprop(blob, node, "compatible", &len); 255 if (!list) 256 return -ENOENT; 257 258 end = list + len; 259 while (list < end) { 260 char *s; 261 262 len = strlen(list); 263 if (len >= strlen("pciVVVV,DDDD")) { 264 s = strstr(list, "pci"); 265 266 /* 267 * check if the string is something like pciVVVV,DDDD.RR 268 * or just pciVVVV,DDDD 269 */ 270 if (s && s[7] == ',' && 271 (s[12] == '.' || s[12] == 0)) { 272 s += 3; 273 *vendor = simple_strtol(s, NULL, 16); 274 275 s += 5; 276 *device = simple_strtol(s, NULL, 16); 277 278 return 0; 279 } 280 } 281 list += (len + 1); 282 } 283 284 return -ENOENT; 285 } 286 287 int fdtdec_get_pci_bdf(const void *blob, int node, 288 struct fdt_pci_addr *addr, pci_dev_t *bdf) 289 { 290 u16 dt_vendor, dt_device, vendor, device; 291 int ret; 292 293 /* get vendor id & device id from the compatible string */ 294 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 295 if (ret) 296 return ret; 297 298 /* extract the bdf from fdt_pci_addr */ 299 *bdf = addr->phys_hi & 0xffff00; 300 301 /* read vendor id & device id based on bdf */ 302 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 303 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 304 305 /* 306 * Note there are two places in the device tree to fully describe 307 * a pci device: one is via compatible string with a format of 308 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 309 * the device node's reg address property. We read the vendor id 310 * and device id based on bdf and compare the values with the 311 * "VVVV,DDDD". If they are the same, then we are good to use bdf 312 * to read device's bar. But if they are different, we have to rely 313 * on the vendor id and device id extracted from the compatible 314 * string and locate the real bdf by pci_find_device(). This is 315 * because normally we may only know device's device number and 316 * function number when writing device tree. The bus number is 317 * dynamically assigned during the pci enumeration process. 318 */ 319 if ((dt_vendor != vendor) || (dt_device != device)) { 320 *bdf = pci_find_device(dt_vendor, dt_device, 0); 321 if (*bdf == -1) 322 return -ENODEV; 323 } 324 325 return 0; 326 } 327 328 int fdtdec_get_pci_bar32(const void *blob, int node, 329 struct fdt_pci_addr *addr, u32 *bar) 330 { 331 pci_dev_t bdf; 332 int barnum; 333 int ret; 334 335 /* get pci devices's bdf */ 336 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 337 if (ret) 338 return ret; 339 340 /* extract the bar number from fdt_pci_addr */ 341 barnum = addr->phys_hi & 0xff; 342 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 343 return -EINVAL; 344 345 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 346 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 347 348 return 0; 349 } 350 #endif 351 352 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 353 uint64_t default_val) 354 { 355 const uint64_t *cell64; 356 int length; 357 358 cell64 = fdt_getprop(blob, node, prop_name, &length); 359 if (!cell64 || length < sizeof(*cell64)) 360 return default_val; 361 362 return fdt64_to_cpu(*cell64); 363 } 364 365 int fdtdec_get_is_enabled(const void *blob, int node) 366 { 367 const char *cell; 368 369 /* 370 * It should say "okay", so only allow that. Some fdts use "ok" but 371 * this is a bug. Please fix your device tree source file. See here 372 * for discussion: 373 * 374 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 375 */ 376 cell = fdt_getprop(blob, node, "status", NULL); 377 if (cell) 378 return 0 == strcmp(cell, "okay"); 379 return 1; 380 } 381 382 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 383 { 384 enum fdt_compat_id id; 385 386 /* Search our drivers */ 387 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 388 if (0 == fdt_node_check_compatible(blob, node, 389 compat_names[id])) 390 return id; 391 return COMPAT_UNKNOWN; 392 } 393 394 int fdtdec_next_compatible(const void *blob, int node, 395 enum fdt_compat_id id) 396 { 397 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 398 } 399 400 int fdtdec_next_compatible_subnode(const void *blob, int node, 401 enum fdt_compat_id id, int *depthp) 402 { 403 do { 404 node = fdt_next_node(blob, node, depthp); 405 } while (*depthp > 1); 406 407 /* If this is a direct subnode, and compatible, return it */ 408 if (*depthp == 1 && 0 == fdt_node_check_compatible( 409 blob, node, compat_names[id])) 410 return node; 411 412 return -FDT_ERR_NOTFOUND; 413 } 414 415 int fdtdec_next_alias(const void *blob, const char *name, 416 enum fdt_compat_id id, int *upto) 417 { 418 #define MAX_STR_LEN 20 419 char str[MAX_STR_LEN + 20]; 420 int node, err; 421 422 /* snprintf() is not available */ 423 assert(strlen(name) < MAX_STR_LEN); 424 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 425 node = fdt_path_offset(blob, str); 426 if (node < 0) 427 return node; 428 err = fdt_node_check_compatible(blob, node, compat_names[id]); 429 if (err < 0) 430 return err; 431 if (err) 432 return -FDT_ERR_NOTFOUND; 433 (*upto)++; 434 return node; 435 } 436 437 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 438 enum fdt_compat_id id, int *node_list, int maxcount) 439 { 440 memset(node_list, '\0', sizeof(*node_list) * maxcount); 441 442 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 443 } 444 445 /* TODO: Can we tighten this code up a little? */ 446 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 447 enum fdt_compat_id id, int *node_list, int maxcount) 448 { 449 int name_len = strlen(name); 450 int nodes[maxcount]; 451 int num_found = 0; 452 int offset, node; 453 int alias_node; 454 int count; 455 int i, j; 456 457 /* find the alias node if present */ 458 alias_node = fdt_path_offset(blob, "/aliases"); 459 460 /* 461 * start with nothing, and we can assume that the root node can't 462 * match 463 */ 464 memset(nodes, '\0', sizeof(nodes)); 465 466 /* First find all the compatible nodes */ 467 for (node = count = 0; node >= 0 && count < maxcount;) { 468 node = fdtdec_next_compatible(blob, node, id); 469 if (node >= 0) 470 nodes[count++] = node; 471 } 472 if (node >= 0) 473 debug("%s: warning: maxcount exceeded with alias '%s'\n", 474 __func__, name); 475 476 /* Now find all the aliases */ 477 for (offset = fdt_first_property_offset(blob, alias_node); 478 offset > 0; 479 offset = fdt_next_property_offset(blob, offset)) { 480 const struct fdt_property *prop; 481 const char *path; 482 int number; 483 int found; 484 485 node = 0; 486 prop = fdt_get_property_by_offset(blob, offset, NULL); 487 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 488 if (prop->len && 0 == strncmp(path, name, name_len)) 489 node = fdt_path_offset(blob, prop->data); 490 if (node <= 0) 491 continue; 492 493 /* Get the alias number */ 494 number = simple_strtoul(path + name_len, NULL, 10); 495 if (number < 0 || number >= maxcount) { 496 debug("%s: warning: alias '%s' is out of range\n", 497 __func__, path); 498 continue; 499 } 500 501 /* Make sure the node we found is actually in our list! */ 502 found = -1; 503 for (j = 0; j < count; j++) 504 if (nodes[j] == node) { 505 found = j; 506 break; 507 } 508 509 if (found == -1) { 510 debug("%s: warning: alias '%s' points to a node " 511 "'%s' that is missing or is not compatible " 512 " with '%s'\n", __func__, path, 513 fdt_get_name(blob, node, NULL), 514 compat_names[id]); 515 continue; 516 } 517 518 /* 519 * Add this node to our list in the right place, and mark 520 * it as done. 521 */ 522 if (fdtdec_get_is_enabled(blob, node)) { 523 if (node_list[number]) { 524 debug("%s: warning: alias '%s' requires that " 525 "a node be placed in the list in a " 526 "position which is already filled by " 527 "node '%s'\n", __func__, path, 528 fdt_get_name(blob, node, NULL)); 529 continue; 530 } 531 node_list[number] = node; 532 if (number >= num_found) 533 num_found = number + 1; 534 } 535 nodes[found] = 0; 536 } 537 538 /* Add any nodes not mentioned by an alias */ 539 for (i = j = 0; i < maxcount; i++) { 540 if (!node_list[i]) { 541 for (; j < maxcount; j++) 542 if (nodes[j] && 543 fdtdec_get_is_enabled(blob, nodes[j])) 544 break; 545 546 /* Have we run out of nodes to add? */ 547 if (j == maxcount) 548 break; 549 550 assert(!node_list[i]); 551 node_list[i] = nodes[j++]; 552 if (i >= num_found) 553 num_found = i + 1; 554 } 555 } 556 557 return num_found; 558 } 559 560 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 561 int *seqp) 562 { 563 int base_len = strlen(base); 564 const char *find_name; 565 int find_namelen; 566 int prop_offset; 567 int aliases; 568 569 find_name = fdt_get_name(blob, offset, &find_namelen); 570 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 571 572 aliases = fdt_path_offset(blob, "/aliases"); 573 for (prop_offset = fdt_first_property_offset(blob, aliases); 574 prop_offset > 0; 575 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 576 const char *prop; 577 const char *name; 578 const char *slash; 579 int len, val; 580 581 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 582 debug(" - %s, %s\n", name, prop); 583 if (len < find_namelen || *prop != '/' || prop[len - 1] || 584 strncmp(name, base, base_len)) 585 continue; 586 587 slash = strrchr(prop, '/'); 588 if (strcmp(slash + 1, find_name)) 589 continue; 590 val = trailing_strtol(name); 591 if (val != -1) { 592 *seqp = val; 593 debug("Found seq %d\n", *seqp); 594 return 0; 595 } 596 } 597 598 debug("Not found\n"); 599 return -ENOENT; 600 } 601 602 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 603 { 604 int chosen_node; 605 606 if (!blob) 607 return NULL; 608 chosen_node = fdt_path_offset(blob, "/chosen"); 609 return fdt_getprop(blob, chosen_node, name, NULL); 610 } 611 612 int fdtdec_get_chosen_node(const void *blob, const char *name) 613 { 614 const char *prop; 615 616 prop = fdtdec_get_chosen_prop(blob, name); 617 if (!prop) 618 return -FDT_ERR_NOTFOUND; 619 return fdt_path_offset(blob, prop); 620 } 621 622 int fdtdec_check_fdt(void) 623 { 624 /* 625 * We must have an FDT, but we cannot panic() yet since the console 626 * is not ready. So for now, just assert(). Boards which need an early 627 * FDT (prior to console ready) will need to make their own 628 * arrangements and do their own checks. 629 */ 630 assert(!fdtdec_prepare_fdt()); 631 return 0; 632 } 633 634 /* 635 * This function is a little odd in that it accesses global data. At some 636 * point if the architecture board.c files merge this will make more sense. 637 * Even now, it is common code. 638 */ 639 int fdtdec_prepare_fdt(void) 640 { 641 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 642 fdt_check_header(gd->fdt_blob)) { 643 #ifdef CONFIG_SPL_BUILD 644 puts("Missing DTB\n"); 645 #else 646 puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); 647 # ifdef DEBUG 648 if (gd->fdt_blob) { 649 printf("fdt_blob=%p\n", gd->fdt_blob); 650 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 651 32, 0); 652 } 653 # endif 654 #endif 655 return -1; 656 } 657 return 0; 658 } 659 660 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 661 { 662 const u32 *phandle; 663 int lookup; 664 665 debug("%s: %s\n", __func__, prop_name); 666 phandle = fdt_getprop(blob, node, prop_name, NULL); 667 if (!phandle) 668 return -FDT_ERR_NOTFOUND; 669 670 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 671 return lookup; 672 } 673 674 /** 675 * Look up a property in a node and check that it has a minimum length. 676 * 677 * @param blob FDT blob 678 * @param node node to examine 679 * @param prop_name name of property to find 680 * @param min_len minimum property length in bytes 681 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 682 found, or -FDT_ERR_BADLAYOUT if not enough data 683 * @return pointer to cell, which is only valid if err == 0 684 */ 685 static const void *get_prop_check_min_len(const void *blob, int node, 686 const char *prop_name, int min_len, int *err) 687 { 688 const void *cell; 689 int len; 690 691 debug("%s: %s\n", __func__, prop_name); 692 cell = fdt_getprop(blob, node, prop_name, &len); 693 if (!cell) 694 *err = -FDT_ERR_NOTFOUND; 695 else if (len < min_len) 696 *err = -FDT_ERR_BADLAYOUT; 697 else 698 *err = 0; 699 return cell; 700 } 701 702 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 703 u32 *array, int count) 704 { 705 const u32 *cell; 706 int i, err = 0; 707 708 debug("%s: %s\n", __func__, prop_name); 709 cell = get_prop_check_min_len(blob, node, prop_name, 710 sizeof(u32) * count, &err); 711 if (!err) { 712 for (i = 0; i < count; i++) 713 array[i] = fdt32_to_cpu(cell[i]); 714 } 715 return err; 716 } 717 718 int fdtdec_get_int_array_count(const void *blob, int node, 719 const char *prop_name, u32 *array, int count) 720 { 721 const u32 *cell; 722 int len, elems; 723 int i; 724 725 debug("%s: %s\n", __func__, prop_name); 726 cell = fdt_getprop(blob, node, prop_name, &len); 727 if (!cell) 728 return -FDT_ERR_NOTFOUND; 729 elems = len / sizeof(u32); 730 if (count > elems) 731 count = elems; 732 for (i = 0; i < count; i++) 733 array[i] = fdt32_to_cpu(cell[i]); 734 735 return count; 736 } 737 738 const u32 *fdtdec_locate_array(const void *blob, int node, 739 const char *prop_name, int count) 740 { 741 const u32 *cell; 742 int err; 743 744 cell = get_prop_check_min_len(blob, node, prop_name, 745 sizeof(u32) * count, &err); 746 return err ? NULL : cell; 747 } 748 749 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 750 { 751 const s32 *cell; 752 int len; 753 754 debug("%s: %s\n", __func__, prop_name); 755 cell = fdt_getprop(blob, node, prop_name, &len); 756 return cell != NULL; 757 } 758 759 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 760 const char *list_name, 761 const char *cells_name, 762 int cell_count, int index, 763 struct fdtdec_phandle_args *out_args) 764 { 765 const __be32 *list, *list_end; 766 int rc = 0, size, cur_index = 0; 767 uint32_t count = 0; 768 int node = -1; 769 int phandle; 770 771 /* Retrieve the phandle list property */ 772 list = fdt_getprop(blob, src_node, list_name, &size); 773 if (!list) 774 return -ENOENT; 775 list_end = list + size / sizeof(*list); 776 777 /* Loop over the phandles until all the requested entry is found */ 778 while (list < list_end) { 779 rc = -EINVAL; 780 count = 0; 781 782 /* 783 * If phandle is 0, then it is an empty entry with no 784 * arguments. Skip forward to the next entry. 785 */ 786 phandle = be32_to_cpup(list++); 787 if (phandle) { 788 /* 789 * Find the provider node and parse the #*-cells 790 * property to determine the argument length. 791 * 792 * This is not needed if the cell count is hard-coded 793 * (i.e. cells_name not set, but cell_count is set), 794 * except when we're going to return the found node 795 * below. 796 */ 797 if (cells_name || cur_index == index) { 798 node = fdt_node_offset_by_phandle(blob, 799 phandle); 800 if (!node) { 801 debug("%s: could not find phandle\n", 802 fdt_get_name(blob, src_node, 803 NULL)); 804 goto err; 805 } 806 } 807 808 if (cells_name) { 809 count = fdtdec_get_int(blob, node, cells_name, 810 -1); 811 if (count == -1) { 812 debug("%s: could not get %s for %s\n", 813 fdt_get_name(blob, src_node, 814 NULL), 815 cells_name, 816 fdt_get_name(blob, node, 817 NULL)); 818 goto err; 819 } 820 } else { 821 count = cell_count; 822 } 823 824 /* 825 * Make sure that the arguments actually fit in the 826 * remaining property data length 827 */ 828 if (list + count > list_end) { 829 debug("%s: arguments longer than property\n", 830 fdt_get_name(blob, src_node, NULL)); 831 goto err; 832 } 833 } 834 835 /* 836 * All of the error cases above bail out of the loop, so at 837 * this point, the parsing is successful. If the requested 838 * index matches, then fill the out_args structure and return, 839 * or return -ENOENT for an empty entry. 840 */ 841 rc = -ENOENT; 842 if (cur_index == index) { 843 if (!phandle) 844 goto err; 845 846 if (out_args) { 847 int i; 848 849 if (count > MAX_PHANDLE_ARGS) { 850 debug("%s: too many arguments %d\n", 851 fdt_get_name(blob, src_node, 852 NULL), count); 853 count = MAX_PHANDLE_ARGS; 854 } 855 out_args->node = node; 856 out_args->args_count = count; 857 for (i = 0; i < count; i++) { 858 out_args->args[i] = 859 be32_to_cpup(list++); 860 } 861 } 862 863 /* Found it! return success */ 864 return 0; 865 } 866 867 node = -1; 868 list += count; 869 cur_index++; 870 } 871 872 /* 873 * Result will be one of: 874 * -ENOENT : index is for empty phandle 875 * -EINVAL : parsing error on data 876 * [1..n] : Number of phandle (count mode; when index = -1) 877 */ 878 rc = index < 0 ? cur_index : -ENOENT; 879 err: 880 return rc; 881 } 882 883 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 884 u8 *array, int count) 885 { 886 const u8 *cell; 887 int err; 888 889 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 890 if (!err) 891 memcpy(array, cell, count); 892 return err; 893 } 894 895 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 896 const char *prop_name, int count) 897 { 898 const u8 *cell; 899 int err; 900 901 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 902 if (err) 903 return NULL; 904 return cell; 905 } 906 907 int fdtdec_get_config_int(const void *blob, const char *prop_name, 908 int default_val) 909 { 910 int config_node; 911 912 debug("%s: %s\n", __func__, prop_name); 913 config_node = fdt_path_offset(blob, "/config"); 914 if (config_node < 0) 915 return default_val; 916 return fdtdec_get_int(blob, config_node, prop_name, default_val); 917 } 918 919 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 920 { 921 int config_node; 922 const void *prop; 923 924 debug("%s: %s\n", __func__, prop_name); 925 config_node = fdt_path_offset(blob, "/config"); 926 if (config_node < 0) 927 return 0; 928 prop = fdt_get_property(blob, config_node, prop_name, NULL); 929 930 return prop != NULL; 931 } 932 933 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 934 { 935 const char *nodep; 936 int nodeoffset; 937 int len; 938 939 debug("%s: %s\n", __func__, prop_name); 940 nodeoffset = fdt_path_offset(blob, "/config"); 941 if (nodeoffset < 0) 942 return NULL; 943 944 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 945 if (!nodep) 946 return NULL; 947 948 return (char *)nodep; 949 } 950 951 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 952 fdt_addr_t *basep, fdt_size_t *sizep) 953 { 954 const fdt_addr_t *cell; 955 int len; 956 957 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 958 prop_name); 959 cell = fdt_getprop(blob, node, prop_name, &len); 960 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 961 debug("cell=%p, len=%d\n", cell, len); 962 return -1; 963 } 964 965 *basep = fdt_addr_to_cpu(*cell); 966 *sizep = fdt_size_to_cpu(cell[1]); 967 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 968 (ulong)*sizep); 969 970 return 0; 971 } 972 973 /** 974 * Read a flash entry from the fdt 975 * 976 * @param blob FDT blob 977 * @param node Offset of node to read 978 * @param name Name of node being read 979 * @param entry Place to put offset and size of this node 980 * @return 0 if ok, -ve on error 981 */ 982 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 983 struct fmap_entry *entry) 984 { 985 const char *prop; 986 u32 reg[2]; 987 988 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 989 debug("Node '%s' has bad/missing 'reg' property\n", name); 990 return -FDT_ERR_NOTFOUND; 991 } 992 entry->offset = reg[0]; 993 entry->length = reg[1]; 994 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 995 prop = fdt_getprop(blob, node, "compress", NULL); 996 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 997 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 998 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 999 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 1000 entry->hash = (uint8_t *)prop; 1001 1002 return 0; 1003 } 1004 1005 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 1006 { 1007 u64 number = 0; 1008 1009 while (cells--) 1010 number = (number << 32) | fdt32_to_cpu(*ptr++); 1011 1012 return number; 1013 } 1014 1015 int fdt_get_resource(const void *fdt, int node, const char *property, 1016 unsigned int index, struct fdt_resource *res) 1017 { 1018 const fdt32_t *ptr, *end; 1019 int na, ns, len, parent; 1020 unsigned int i = 0; 1021 1022 parent = fdt_parent_offset(fdt, node); 1023 if (parent < 0) 1024 return parent; 1025 1026 na = fdt_address_cells(fdt, parent); 1027 ns = fdt_size_cells(fdt, parent); 1028 1029 ptr = fdt_getprop(fdt, node, property, &len); 1030 if (!ptr) 1031 return len; 1032 1033 end = ptr + len / sizeof(*ptr); 1034 1035 while (ptr + na + ns <= end) { 1036 if (i == index) { 1037 res->start = res->end = fdtdec_get_number(ptr, na); 1038 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 1039 return 0; 1040 } 1041 1042 ptr += na + ns; 1043 i++; 1044 } 1045 1046 return -FDT_ERR_NOTFOUND; 1047 } 1048 1049 int fdt_get_named_resource(const void *fdt, int node, const char *property, 1050 const char *prop_names, const char *name, 1051 struct fdt_resource *res) 1052 { 1053 int index; 1054 1055 index = fdt_find_string(fdt, node, prop_names, name); 1056 if (index < 0) 1057 return index; 1058 1059 return fdt_get_resource(fdt, node, property, index, res); 1060 } 1061 1062 int fdtdec_decode_memory_region(const void *blob, int config_node, 1063 const char *mem_type, const char *suffix, 1064 fdt_addr_t *basep, fdt_size_t *sizep) 1065 { 1066 char prop_name[50]; 1067 const char *mem; 1068 fdt_size_t size, offset_size; 1069 fdt_addr_t base, offset; 1070 int node; 1071 1072 if (config_node == -1) { 1073 config_node = fdt_path_offset(blob, "/config"); 1074 if (config_node < 0) { 1075 debug("%s: Cannot find /config node\n", __func__); 1076 return -ENOENT; 1077 } 1078 } 1079 if (!suffix) 1080 suffix = ""; 1081 1082 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1083 suffix); 1084 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1085 if (!mem) { 1086 debug("%s: No memory type for '%s', using /memory\n", __func__, 1087 prop_name); 1088 mem = "/memory"; 1089 } 1090 1091 node = fdt_path_offset(blob, mem); 1092 if (node < 0) { 1093 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1094 fdt_strerror(node)); 1095 return -ENOENT; 1096 } 1097 1098 /* 1099 * Not strictly correct - the memory may have multiple banks. We just 1100 * use the first 1101 */ 1102 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1103 debug("%s: Failed to decode memory region %s\n", __func__, 1104 mem); 1105 return -EINVAL; 1106 } 1107 1108 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1109 suffix); 1110 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1111 &offset_size)) { 1112 debug("%s: Failed to decode memory region '%s'\n", __func__, 1113 prop_name); 1114 return -EINVAL; 1115 } 1116 1117 *basep = base + offset; 1118 *sizep = offset_size; 1119 1120 return 0; 1121 } 1122 1123 static int decode_timing_property(const void *blob, int node, const char *name, 1124 struct timing_entry *result) 1125 { 1126 int length, ret = 0; 1127 const u32 *prop; 1128 1129 prop = fdt_getprop(blob, node, name, &length); 1130 if (!prop) { 1131 debug("%s: could not find property %s\n", 1132 fdt_get_name(blob, node, NULL), name); 1133 return length; 1134 } 1135 1136 if (length == sizeof(u32)) { 1137 result->typ = fdtdec_get_int(blob, node, name, 0); 1138 result->min = result->typ; 1139 result->max = result->typ; 1140 } else { 1141 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1142 } 1143 1144 return ret; 1145 } 1146 1147 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1148 struct display_timing *dt) 1149 { 1150 int i, node, timings_node; 1151 u32 val = 0; 1152 int ret = 0; 1153 1154 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1155 if (timings_node < 0) 1156 return timings_node; 1157 1158 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1159 node > 0 && i != index; 1160 node = fdt_next_subnode(blob, node)) 1161 i++; 1162 1163 if (node < 0) 1164 return node; 1165 1166 memset(dt, 0, sizeof(*dt)); 1167 1168 ret |= decode_timing_property(blob, node, "hback-porch", 1169 &dt->hback_porch); 1170 ret |= decode_timing_property(blob, node, "hfront-porch", 1171 &dt->hfront_porch); 1172 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1173 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1174 ret |= decode_timing_property(blob, node, "vback-porch", 1175 &dt->vback_porch); 1176 ret |= decode_timing_property(blob, node, "vfront-porch", 1177 &dt->vfront_porch); 1178 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1179 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1180 ret |= decode_timing_property(blob, node, "clock-frequency", 1181 &dt->pixelclock); 1182 1183 dt->flags = 0; 1184 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1185 if (val != -1) { 1186 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1187 DISPLAY_FLAGS_VSYNC_LOW; 1188 } 1189 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1190 if (val != -1) { 1191 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1192 DISPLAY_FLAGS_HSYNC_LOW; 1193 } 1194 val = fdtdec_get_int(blob, node, "de-active", -1); 1195 if (val != -1) { 1196 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1197 DISPLAY_FLAGS_DE_LOW; 1198 } 1199 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1200 if (val != -1) { 1201 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1202 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1203 } 1204 1205 if (fdtdec_get_bool(blob, node, "interlaced")) 1206 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1207 if (fdtdec_get_bool(blob, node, "doublescan")) 1208 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1209 if (fdtdec_get_bool(blob, node, "doubleclk")) 1210 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1211 1212 return 0; 1213 } 1214 1215 int fdtdec_setup(void) 1216 { 1217 #if CONFIG_IS_ENABLED(OF_CONTROL) 1218 # ifdef CONFIG_OF_EMBED 1219 /* Get a pointer to the FDT */ 1220 gd->fdt_blob = __dtb_dt_begin; 1221 # elif defined CONFIG_OF_SEPARATE 1222 # ifdef CONFIG_SPL_BUILD 1223 /* FDT is at end of BSS unless it is in a different memory region */ 1224 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1225 gd->fdt_blob = (ulong *)&_image_binary_end; 1226 else 1227 gd->fdt_blob = (ulong *)&__bss_end; 1228 # else 1229 /* FDT is at end of image */ 1230 gd->fdt_blob = (ulong *)&_end; 1231 # endif 1232 # elif defined(CONFIG_OF_HOSTFILE) 1233 if (sandbox_read_fdt_from_file()) { 1234 puts("Failed to read control FDT\n"); 1235 return -1; 1236 } 1237 # endif 1238 # ifndef CONFIG_SPL_BUILD 1239 /* Allow the early environment to override the fdt address */ 1240 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1241 (uintptr_t)gd->fdt_blob); 1242 # endif 1243 #endif 1244 return fdtdec_prepare_fdt(); 1245 } 1246 1247 #endif /* !USE_HOSTCC */ 1248