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