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_PCIE, "nvidia,tegra124-pcie"), 38 COMPAT(NVIDIA_TEGRA210_PCIE, "nvidia,tegra210-pcie"), 39 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), 40 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), 41 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), 42 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"), 43 COMPAT(SMSC_LAN9215, "smsc,lan9215"), 44 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), 45 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), 46 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), 47 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), 48 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), 49 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), 50 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), 51 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), 52 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), 53 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), 54 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), 55 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), 56 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), 57 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), 58 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"), 59 COMPAT(GENERIC_SPI_FLASH, "spi-flash"), 60 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), 61 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), 62 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), 63 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), 64 COMPAT(INTEL_MICROCODE, "intel,microcode"), 65 COMPAT(MEMORY_SPD, "memory-spd"), 66 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), 67 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), 68 COMPAT(INTEL_GMA, "intel,gma"), 69 COMPAT(AMS_AS3722, "ams,as3722"), 70 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), 71 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), 72 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"), 73 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"), 74 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"), 75 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"), 76 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"), 77 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"), 78 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"), 79 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"), 80 }; 81 82 const char *fdtdec_get_compatible(enum fdt_compat_id id) 83 { 84 /* We allow reading of the 'unknown' ID for testing purposes */ 85 assert(id >= 0 && id < COMPAT_COUNT); 86 return compat_names[id]; 87 } 88 89 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, 90 const char *prop_name, int index, int na, int ns, 91 fdt_size_t *sizep) 92 { 93 const fdt32_t *prop, *prop_end; 94 const fdt32_t *prop_addr, *prop_size, *prop_after_size; 95 int len; 96 fdt_addr_t addr; 97 98 debug("%s: %s: ", __func__, prop_name); 99 100 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) { 101 debug("(na too large for fdt_addr_t type)\n"); 102 return FDT_ADDR_T_NONE; 103 } 104 105 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) { 106 debug("(ns too large for fdt_size_t type)\n"); 107 return FDT_ADDR_T_NONE; 108 } 109 110 prop = fdt_getprop(blob, node, prop_name, &len); 111 if (!prop) { 112 debug("(not found)\n"); 113 return FDT_ADDR_T_NONE; 114 } 115 prop_end = prop + (len / sizeof(*prop)); 116 117 prop_addr = prop + (index * (na + ns)); 118 prop_size = prop_addr + na; 119 prop_after_size = prop_size + ns; 120 if (prop_after_size > prop_end) { 121 debug("(not enough data: expected >= %d cells, got %d cells)\n", 122 (u32)(prop_after_size - prop), ((u32)(prop_end - prop))); 123 return FDT_ADDR_T_NONE; 124 } 125 126 addr = fdtdec_get_number(prop_addr, na); 127 128 if (sizep) { 129 *sizep = fdtdec_get_number(prop_size, ns); 130 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep); 131 } else { 132 debug("addr=%08llx\n", (u64)addr); 133 } 134 135 return addr; 136 } 137 138 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent, 139 int node, const char *prop_name, int index, fdt_size_t *sizep) 140 { 141 int na, ns; 142 143 debug("%s: ", __func__); 144 145 na = fdt_address_cells(blob, parent); 146 if (na < 1) { 147 debug("(bad #address-cells)\n"); 148 return FDT_ADDR_T_NONE; 149 } 150 151 ns = fdt_size_cells(blob, parent); 152 if (ns < 0) { 153 debug("(bad #size-cells)\n"); 154 return FDT_ADDR_T_NONE; 155 } 156 157 debug("na=%d, ns=%d, ", na, ns); 158 159 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na, 160 ns, sizep); 161 } 162 163 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node, 164 const char *prop_name, int index, fdt_size_t *sizep) 165 { 166 int parent; 167 168 debug("%s: ", __func__); 169 170 parent = fdt_parent_offset(blob, node); 171 if (parent < 0) { 172 debug("(no parent found)\n"); 173 return FDT_ADDR_T_NONE; 174 } 175 176 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name, 177 index, sizep); 178 } 179 180 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, 181 const char *prop_name, fdt_size_t *sizep) 182 { 183 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0; 184 185 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0, 186 sizeof(fdt_addr_t) / sizeof(fdt32_t), 187 ns, sizep); 188 } 189 190 fdt_addr_t fdtdec_get_addr(const void *blob, int node, 191 const char *prop_name) 192 { 193 return fdtdec_get_addr_size(blob, node, prop_name, NULL); 194 } 195 196 #ifdef CONFIG_PCI 197 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, 198 const char *prop_name, struct fdt_pci_addr *addr) 199 { 200 const u32 *cell; 201 int len; 202 int ret = -ENOENT; 203 204 debug("%s: %s: ", __func__, prop_name); 205 206 /* 207 * If we follow the pci bus bindings strictly, we should check 208 * the value of the node's parent node's #address-cells and 209 * #size-cells. They need to be 3 and 2 accordingly. However, 210 * for simplicity we skip the check here. 211 */ 212 cell = fdt_getprop(blob, node, prop_name, &len); 213 if (!cell) 214 goto fail; 215 216 if ((len % FDT_PCI_REG_SIZE) == 0) { 217 int num = len / FDT_PCI_REG_SIZE; 218 int i; 219 220 for (i = 0; i < num; i++) { 221 debug("pci address #%d: %08lx %08lx %08lx\n", i, 222 (ulong)fdt32_to_cpu(cell[0]), 223 (ulong)fdt32_to_cpu(cell[1]), 224 (ulong)fdt32_to_cpu(cell[2])); 225 if ((fdt32_to_cpu(*cell) & type) == type) { 226 addr->phys_hi = fdt32_to_cpu(cell[0]); 227 addr->phys_mid = fdt32_to_cpu(cell[1]); 228 addr->phys_lo = fdt32_to_cpu(cell[1]); 229 break; 230 } else { 231 cell += (FDT_PCI_ADDR_CELLS + 232 FDT_PCI_SIZE_CELLS); 233 } 234 } 235 236 if (i == num) { 237 ret = -ENXIO; 238 goto fail; 239 } 240 241 return 0; 242 } else { 243 ret = -EINVAL; 244 } 245 246 fail: 247 debug("(not found)\n"); 248 return ret; 249 } 250 251 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) 252 { 253 const char *list, *end; 254 int len; 255 256 list = fdt_getprop(blob, node, "compatible", &len); 257 if (!list) 258 return -ENOENT; 259 260 end = list + len; 261 while (list < end) { 262 char *s; 263 264 len = strlen(list); 265 if (len >= strlen("pciVVVV,DDDD")) { 266 s = strstr(list, "pci"); 267 268 /* 269 * check if the string is something like pciVVVV,DDDD.RR 270 * or just pciVVVV,DDDD 271 */ 272 if (s && s[7] == ',' && 273 (s[12] == '.' || s[12] == 0)) { 274 s += 3; 275 *vendor = simple_strtol(s, NULL, 16); 276 277 s += 5; 278 *device = simple_strtol(s, NULL, 16); 279 280 return 0; 281 } 282 } 283 list += (len + 1); 284 } 285 286 return -ENOENT; 287 } 288 289 int fdtdec_get_pci_bdf(const void *blob, int node, 290 struct fdt_pci_addr *addr, pci_dev_t *bdf) 291 { 292 u16 dt_vendor, dt_device, vendor, device; 293 int ret; 294 295 /* get vendor id & device id from the compatible string */ 296 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); 297 if (ret) 298 return ret; 299 300 /* extract the bdf from fdt_pci_addr */ 301 *bdf = addr->phys_hi & 0xffff00; 302 303 /* read vendor id & device id based on bdf */ 304 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); 305 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); 306 307 /* 308 * Note there are two places in the device tree to fully describe 309 * a pci device: one is via compatible string with a format of 310 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in 311 * the device node's reg address property. We read the vendor id 312 * and device id based on bdf and compare the values with the 313 * "VVVV,DDDD". If they are the same, then we are good to use bdf 314 * to read device's bar. But if they are different, we have to rely 315 * on the vendor id and device id extracted from the compatible 316 * string and locate the real bdf by pci_find_device(). This is 317 * because normally we may only know device's device number and 318 * function number when writing device tree. The bus number is 319 * dynamically assigned during the pci enumeration process. 320 */ 321 if ((dt_vendor != vendor) || (dt_device != device)) { 322 *bdf = pci_find_device(dt_vendor, dt_device, 0); 323 if (*bdf == -1) 324 return -ENODEV; 325 } 326 327 return 0; 328 } 329 330 int fdtdec_get_pci_bar32(const void *blob, int node, 331 struct fdt_pci_addr *addr, u32 *bar) 332 { 333 pci_dev_t bdf; 334 int barnum; 335 int ret; 336 337 /* get pci devices's bdf */ 338 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); 339 if (ret) 340 return ret; 341 342 /* extract the bar number from fdt_pci_addr */ 343 barnum = addr->phys_hi & 0xff; 344 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) 345 return -EINVAL; 346 347 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; 348 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); 349 350 return 0; 351 } 352 #endif 353 354 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, 355 uint64_t default_val) 356 { 357 const uint64_t *cell64; 358 int length; 359 360 cell64 = fdt_getprop(blob, node, prop_name, &length); 361 if (!cell64 || length < sizeof(*cell64)) 362 return default_val; 363 364 return fdt64_to_cpu(*cell64); 365 } 366 367 int fdtdec_get_is_enabled(const void *blob, int node) 368 { 369 const char *cell; 370 371 /* 372 * It should say "okay", so only allow that. Some fdts use "ok" but 373 * this is a bug. Please fix your device tree source file. See here 374 * for discussion: 375 * 376 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html 377 */ 378 cell = fdt_getprop(blob, node, "status", NULL); 379 if (cell) 380 return 0 == strcmp(cell, "okay"); 381 return 1; 382 } 383 384 enum fdt_compat_id fdtdec_lookup(const void *blob, int node) 385 { 386 enum fdt_compat_id id; 387 388 /* Search our drivers */ 389 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) 390 if (0 == fdt_node_check_compatible(blob, node, 391 compat_names[id])) 392 return id; 393 return COMPAT_UNKNOWN; 394 } 395 396 int fdtdec_next_compatible(const void *blob, int node, 397 enum fdt_compat_id id) 398 { 399 return fdt_node_offset_by_compatible(blob, node, compat_names[id]); 400 } 401 402 int fdtdec_next_compatible_subnode(const void *blob, int node, 403 enum fdt_compat_id id, int *depthp) 404 { 405 do { 406 node = fdt_next_node(blob, node, depthp); 407 } while (*depthp > 1); 408 409 /* If this is a direct subnode, and compatible, return it */ 410 if (*depthp == 1 && 0 == fdt_node_check_compatible( 411 blob, node, compat_names[id])) 412 return node; 413 414 return -FDT_ERR_NOTFOUND; 415 } 416 417 int fdtdec_next_alias(const void *blob, const char *name, 418 enum fdt_compat_id id, int *upto) 419 { 420 #define MAX_STR_LEN 20 421 char str[MAX_STR_LEN + 20]; 422 int node, err; 423 424 /* snprintf() is not available */ 425 assert(strlen(name) < MAX_STR_LEN); 426 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); 427 node = fdt_path_offset(blob, str); 428 if (node < 0) 429 return node; 430 err = fdt_node_check_compatible(blob, node, compat_names[id]); 431 if (err < 0) 432 return err; 433 if (err) 434 return -FDT_ERR_NOTFOUND; 435 (*upto)++; 436 return node; 437 } 438 439 int fdtdec_find_aliases_for_id(const void *blob, const char *name, 440 enum fdt_compat_id id, int *node_list, int maxcount) 441 { 442 memset(node_list, '\0', sizeof(*node_list) * maxcount); 443 444 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); 445 } 446 447 /* TODO: Can we tighten this code up a little? */ 448 int fdtdec_add_aliases_for_id(const void *blob, const char *name, 449 enum fdt_compat_id id, int *node_list, int maxcount) 450 { 451 int name_len = strlen(name); 452 int nodes[maxcount]; 453 int num_found = 0; 454 int offset, node; 455 int alias_node; 456 int count; 457 int i, j; 458 459 /* find the alias node if present */ 460 alias_node = fdt_path_offset(blob, "/aliases"); 461 462 /* 463 * start with nothing, and we can assume that the root node can't 464 * match 465 */ 466 memset(nodes, '\0', sizeof(nodes)); 467 468 /* First find all the compatible nodes */ 469 for (node = count = 0; node >= 0 && count < maxcount;) { 470 node = fdtdec_next_compatible(blob, node, id); 471 if (node >= 0) 472 nodes[count++] = node; 473 } 474 if (node >= 0) 475 debug("%s: warning: maxcount exceeded with alias '%s'\n", 476 __func__, name); 477 478 /* Now find all the aliases */ 479 for (offset = fdt_first_property_offset(blob, alias_node); 480 offset > 0; 481 offset = fdt_next_property_offset(blob, offset)) { 482 const struct fdt_property *prop; 483 const char *path; 484 int number; 485 int found; 486 487 node = 0; 488 prop = fdt_get_property_by_offset(blob, offset, NULL); 489 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); 490 if (prop->len && 0 == strncmp(path, name, name_len)) 491 node = fdt_path_offset(blob, prop->data); 492 if (node <= 0) 493 continue; 494 495 /* Get the alias number */ 496 number = simple_strtoul(path + name_len, NULL, 10); 497 if (number < 0 || number >= maxcount) { 498 debug("%s: warning: alias '%s' is out of range\n", 499 __func__, path); 500 continue; 501 } 502 503 /* Make sure the node we found is actually in our list! */ 504 found = -1; 505 for (j = 0; j < count; j++) 506 if (nodes[j] == node) { 507 found = j; 508 break; 509 } 510 511 if (found == -1) { 512 debug("%s: warning: alias '%s' points to a node " 513 "'%s' that is missing or is not compatible " 514 " with '%s'\n", __func__, path, 515 fdt_get_name(blob, node, NULL), 516 compat_names[id]); 517 continue; 518 } 519 520 /* 521 * Add this node to our list in the right place, and mark 522 * it as done. 523 */ 524 if (fdtdec_get_is_enabled(blob, node)) { 525 if (node_list[number]) { 526 debug("%s: warning: alias '%s' requires that " 527 "a node be placed in the list in a " 528 "position which is already filled by " 529 "node '%s'\n", __func__, path, 530 fdt_get_name(blob, node, NULL)); 531 continue; 532 } 533 node_list[number] = node; 534 if (number >= num_found) 535 num_found = number + 1; 536 } 537 nodes[found] = 0; 538 } 539 540 /* Add any nodes not mentioned by an alias */ 541 for (i = j = 0; i < maxcount; i++) { 542 if (!node_list[i]) { 543 for (; j < maxcount; j++) 544 if (nodes[j] && 545 fdtdec_get_is_enabled(blob, nodes[j])) 546 break; 547 548 /* Have we run out of nodes to add? */ 549 if (j == maxcount) 550 break; 551 552 assert(!node_list[i]); 553 node_list[i] = nodes[j++]; 554 if (i >= num_found) 555 num_found = i + 1; 556 } 557 } 558 559 return num_found; 560 } 561 562 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, 563 int *seqp) 564 { 565 int base_len = strlen(base); 566 const char *find_name; 567 int find_namelen; 568 int prop_offset; 569 int aliases; 570 571 find_name = fdt_get_name(blob, offset, &find_namelen); 572 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); 573 574 aliases = fdt_path_offset(blob, "/aliases"); 575 for (prop_offset = fdt_first_property_offset(blob, aliases); 576 prop_offset > 0; 577 prop_offset = fdt_next_property_offset(blob, prop_offset)) { 578 const char *prop; 579 const char *name; 580 const char *slash; 581 int len, val; 582 583 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); 584 debug(" - %s, %s\n", name, prop); 585 if (len < find_namelen || *prop != '/' || prop[len - 1] || 586 strncmp(name, base, base_len)) 587 continue; 588 589 slash = strrchr(prop, '/'); 590 if (strcmp(slash + 1, find_name)) 591 continue; 592 val = trailing_strtol(name); 593 if (val != -1) { 594 *seqp = val; 595 debug("Found seq %d\n", *seqp); 596 return 0; 597 } 598 } 599 600 debug("Not found\n"); 601 return -ENOENT; 602 } 603 604 const char *fdtdec_get_chosen_prop(const void *blob, const char *name) 605 { 606 int chosen_node; 607 608 if (!blob) 609 return NULL; 610 chosen_node = fdt_path_offset(blob, "/chosen"); 611 return fdt_getprop(blob, chosen_node, name, NULL); 612 } 613 614 int fdtdec_get_chosen_node(const void *blob, const char *name) 615 { 616 const char *prop; 617 618 prop = fdtdec_get_chosen_prop(blob, name); 619 if (!prop) 620 return -FDT_ERR_NOTFOUND; 621 return fdt_path_offset(blob, prop); 622 } 623 624 int fdtdec_check_fdt(void) 625 { 626 /* 627 * We must have an FDT, but we cannot panic() yet since the console 628 * is not ready. So for now, just assert(). Boards which need an early 629 * FDT (prior to console ready) will need to make their own 630 * arrangements and do their own checks. 631 */ 632 assert(!fdtdec_prepare_fdt()); 633 return 0; 634 } 635 636 /* 637 * This function is a little odd in that it accesses global data. At some 638 * point if the architecture board.c files merge this will make more sense. 639 * Even now, it is common code. 640 */ 641 int fdtdec_prepare_fdt(void) 642 { 643 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || 644 fdt_check_header(gd->fdt_blob)) { 645 #ifdef CONFIG_SPL_BUILD 646 puts("Missing DTB\n"); 647 #else 648 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"); 649 # ifdef DEBUG 650 if (gd->fdt_blob) { 651 printf("fdt_blob=%p\n", gd->fdt_blob); 652 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4, 653 32, 0); 654 } 655 # endif 656 #endif 657 return -1; 658 } 659 return 0; 660 } 661 662 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) 663 { 664 const u32 *phandle; 665 int lookup; 666 667 debug("%s: %s\n", __func__, prop_name); 668 phandle = fdt_getprop(blob, node, prop_name, NULL); 669 if (!phandle) 670 return -FDT_ERR_NOTFOUND; 671 672 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); 673 return lookup; 674 } 675 676 /** 677 * Look up a property in a node and check that it has a minimum length. 678 * 679 * @param blob FDT blob 680 * @param node node to examine 681 * @param prop_name name of property to find 682 * @param min_len minimum property length in bytes 683 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not 684 found, or -FDT_ERR_BADLAYOUT if not enough data 685 * @return pointer to cell, which is only valid if err == 0 686 */ 687 static const void *get_prop_check_min_len(const void *blob, int node, 688 const char *prop_name, int min_len, int *err) 689 { 690 const void *cell; 691 int len; 692 693 debug("%s: %s\n", __func__, prop_name); 694 cell = fdt_getprop(blob, node, prop_name, &len); 695 if (!cell) 696 *err = -FDT_ERR_NOTFOUND; 697 else if (len < min_len) 698 *err = -FDT_ERR_BADLAYOUT; 699 else 700 *err = 0; 701 return cell; 702 } 703 704 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, 705 u32 *array, int count) 706 { 707 const u32 *cell; 708 int i, err = 0; 709 710 debug("%s: %s\n", __func__, prop_name); 711 cell = get_prop_check_min_len(blob, node, prop_name, 712 sizeof(u32) * count, &err); 713 if (!err) { 714 for (i = 0; i < count; i++) 715 array[i] = fdt32_to_cpu(cell[i]); 716 } 717 return err; 718 } 719 720 int fdtdec_get_int_array_count(const void *blob, int node, 721 const char *prop_name, u32 *array, int count) 722 { 723 const u32 *cell; 724 int len, elems; 725 int i; 726 727 debug("%s: %s\n", __func__, prop_name); 728 cell = fdt_getprop(blob, node, prop_name, &len); 729 if (!cell) 730 return -FDT_ERR_NOTFOUND; 731 elems = len / sizeof(u32); 732 if (count > elems) 733 count = elems; 734 for (i = 0; i < count; i++) 735 array[i] = fdt32_to_cpu(cell[i]); 736 737 return count; 738 } 739 740 const u32 *fdtdec_locate_array(const void *blob, int node, 741 const char *prop_name, int count) 742 { 743 const u32 *cell; 744 int err; 745 746 cell = get_prop_check_min_len(blob, node, prop_name, 747 sizeof(u32) * count, &err); 748 return err ? NULL : cell; 749 } 750 751 int fdtdec_get_bool(const void *blob, int node, const char *prop_name) 752 { 753 const s32 *cell; 754 int len; 755 756 debug("%s: %s\n", __func__, prop_name); 757 cell = fdt_getprop(blob, node, prop_name, &len); 758 return cell != NULL; 759 } 760 761 int fdtdec_parse_phandle_with_args(const void *blob, int src_node, 762 const char *list_name, 763 const char *cells_name, 764 int cell_count, int index, 765 struct fdtdec_phandle_args *out_args) 766 { 767 const __be32 *list, *list_end; 768 int rc = 0, size, cur_index = 0; 769 uint32_t count = 0; 770 int node = -1; 771 int phandle; 772 773 /* Retrieve the phandle list property */ 774 list = fdt_getprop(blob, src_node, list_name, &size); 775 if (!list) 776 return -ENOENT; 777 list_end = list + size / sizeof(*list); 778 779 /* Loop over the phandles until all the requested entry is found */ 780 while (list < list_end) { 781 rc = -EINVAL; 782 count = 0; 783 784 /* 785 * If phandle is 0, then it is an empty entry with no 786 * arguments. Skip forward to the next entry. 787 */ 788 phandle = be32_to_cpup(list++); 789 if (phandle) { 790 /* 791 * Find the provider node and parse the #*-cells 792 * property to determine the argument length. 793 * 794 * This is not needed if the cell count is hard-coded 795 * (i.e. cells_name not set, but cell_count is set), 796 * except when we're going to return the found node 797 * below. 798 */ 799 if (cells_name || cur_index == index) { 800 node = fdt_node_offset_by_phandle(blob, 801 phandle); 802 if (!node) { 803 debug("%s: could not find phandle\n", 804 fdt_get_name(blob, src_node, 805 NULL)); 806 goto err; 807 } 808 } 809 810 if (cells_name) { 811 count = fdtdec_get_int(blob, node, cells_name, 812 -1); 813 if (count == -1) { 814 debug("%s: could not get %s for %s\n", 815 fdt_get_name(blob, src_node, 816 NULL), 817 cells_name, 818 fdt_get_name(blob, node, 819 NULL)); 820 goto err; 821 } 822 } else { 823 count = cell_count; 824 } 825 826 /* 827 * Make sure that the arguments actually fit in the 828 * remaining property data length 829 */ 830 if (list + count > list_end) { 831 debug("%s: arguments longer than property\n", 832 fdt_get_name(blob, src_node, NULL)); 833 goto err; 834 } 835 } 836 837 /* 838 * All of the error cases above bail out of the loop, so at 839 * this point, the parsing is successful. If the requested 840 * index matches, then fill the out_args structure and return, 841 * or return -ENOENT for an empty entry. 842 */ 843 rc = -ENOENT; 844 if (cur_index == index) { 845 if (!phandle) 846 goto err; 847 848 if (out_args) { 849 int i; 850 851 if (count > MAX_PHANDLE_ARGS) { 852 debug("%s: too many arguments %d\n", 853 fdt_get_name(blob, src_node, 854 NULL), count); 855 count = MAX_PHANDLE_ARGS; 856 } 857 out_args->node = node; 858 out_args->args_count = count; 859 for (i = 0; i < count; i++) { 860 out_args->args[i] = 861 be32_to_cpup(list++); 862 } 863 } 864 865 /* Found it! return success */ 866 return 0; 867 } 868 869 node = -1; 870 list += count; 871 cur_index++; 872 } 873 874 /* 875 * Result will be one of: 876 * -ENOENT : index is for empty phandle 877 * -EINVAL : parsing error on data 878 * [1..n] : Number of phandle (count mode; when index = -1) 879 */ 880 rc = index < 0 ? cur_index : -ENOENT; 881 err: 882 return rc; 883 } 884 885 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, 886 u8 *array, int count) 887 { 888 const u8 *cell; 889 int err; 890 891 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 892 if (!err) 893 memcpy(array, cell, count); 894 return err; 895 } 896 897 const u8 *fdtdec_locate_byte_array(const void *blob, int node, 898 const char *prop_name, int count) 899 { 900 const u8 *cell; 901 int err; 902 903 cell = get_prop_check_min_len(blob, node, prop_name, count, &err); 904 if (err) 905 return NULL; 906 return cell; 907 } 908 909 int fdtdec_get_config_int(const void *blob, const char *prop_name, 910 int default_val) 911 { 912 int config_node; 913 914 debug("%s: %s\n", __func__, prop_name); 915 config_node = fdt_path_offset(blob, "/config"); 916 if (config_node < 0) 917 return default_val; 918 return fdtdec_get_int(blob, config_node, prop_name, default_val); 919 } 920 921 int fdtdec_get_config_bool(const void *blob, const char *prop_name) 922 { 923 int config_node; 924 const void *prop; 925 926 debug("%s: %s\n", __func__, prop_name); 927 config_node = fdt_path_offset(blob, "/config"); 928 if (config_node < 0) 929 return 0; 930 prop = fdt_get_property(blob, config_node, prop_name, NULL); 931 932 return prop != NULL; 933 } 934 935 char *fdtdec_get_config_string(const void *blob, const char *prop_name) 936 { 937 const char *nodep; 938 int nodeoffset; 939 int len; 940 941 debug("%s: %s\n", __func__, prop_name); 942 nodeoffset = fdt_path_offset(blob, "/config"); 943 if (nodeoffset < 0) 944 return NULL; 945 946 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); 947 if (!nodep) 948 return NULL; 949 950 return (char *)nodep; 951 } 952 953 int fdtdec_decode_region(const void *blob, int node, const char *prop_name, 954 fdt_addr_t *basep, fdt_size_t *sizep) 955 { 956 const fdt_addr_t *cell; 957 int len; 958 959 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), 960 prop_name); 961 cell = fdt_getprop(blob, node, prop_name, &len); 962 if (!cell || (len < sizeof(fdt_addr_t) * 2)) { 963 debug("cell=%p, len=%d\n", cell, len); 964 return -1; 965 } 966 967 *basep = fdt_addr_to_cpu(*cell); 968 *sizep = fdt_size_to_cpu(cell[1]); 969 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, 970 (ulong)*sizep); 971 972 return 0; 973 } 974 975 /** 976 * Read a flash entry from the fdt 977 * 978 * @param blob FDT blob 979 * @param node Offset of node to read 980 * @param name Name of node being read 981 * @param entry Place to put offset and size of this node 982 * @return 0 if ok, -ve on error 983 */ 984 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, 985 struct fmap_entry *entry) 986 { 987 const char *prop; 988 u32 reg[2]; 989 990 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { 991 debug("Node '%s' has bad/missing 'reg' property\n", name); 992 return -FDT_ERR_NOTFOUND; 993 } 994 entry->offset = reg[0]; 995 entry->length = reg[1]; 996 entry->used = fdtdec_get_int(blob, node, "used", entry->length); 997 prop = fdt_getprop(blob, node, "compress", NULL); 998 entry->compress_algo = prop && !strcmp(prop, "lzo") ? 999 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; 1000 prop = fdt_getprop(blob, node, "hash", &entry->hash_size); 1001 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; 1002 entry->hash = (uint8_t *)prop; 1003 1004 return 0; 1005 } 1006 1007 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) 1008 { 1009 u64 number = 0; 1010 1011 while (cells--) 1012 number = (number << 32) | fdt32_to_cpu(*ptr++); 1013 1014 return number; 1015 } 1016 1017 int fdt_get_resource(const void *fdt, int node, const char *property, 1018 unsigned int index, struct fdt_resource *res) 1019 { 1020 const fdt32_t *ptr, *end; 1021 int na, ns, len, parent; 1022 unsigned int i = 0; 1023 1024 parent = fdt_parent_offset(fdt, node); 1025 if (parent < 0) 1026 return parent; 1027 1028 na = fdt_address_cells(fdt, parent); 1029 ns = fdt_size_cells(fdt, parent); 1030 1031 ptr = fdt_getprop(fdt, node, property, &len); 1032 if (!ptr) 1033 return len; 1034 1035 end = ptr + len / sizeof(*ptr); 1036 1037 while (ptr + na + ns <= end) { 1038 if (i == index) { 1039 res->start = res->end = fdtdec_get_number(ptr, na); 1040 res->end += fdtdec_get_number(&ptr[na], ns) - 1; 1041 return 0; 1042 } 1043 1044 ptr += na + ns; 1045 i++; 1046 } 1047 1048 return -FDT_ERR_NOTFOUND; 1049 } 1050 1051 int fdt_get_named_resource(const void *fdt, int node, const char *property, 1052 const char *prop_names, const char *name, 1053 struct fdt_resource *res) 1054 { 1055 int index; 1056 1057 index = fdt_find_string(fdt, node, prop_names, name); 1058 if (index < 0) 1059 return index; 1060 1061 return fdt_get_resource(fdt, node, property, index, res); 1062 } 1063 1064 int fdtdec_decode_memory_region(const void *blob, int config_node, 1065 const char *mem_type, const char *suffix, 1066 fdt_addr_t *basep, fdt_size_t *sizep) 1067 { 1068 char prop_name[50]; 1069 const char *mem; 1070 fdt_size_t size, offset_size; 1071 fdt_addr_t base, offset; 1072 int node; 1073 1074 if (config_node == -1) { 1075 config_node = fdt_path_offset(blob, "/config"); 1076 if (config_node < 0) { 1077 debug("%s: Cannot find /config node\n", __func__); 1078 return -ENOENT; 1079 } 1080 } 1081 if (!suffix) 1082 suffix = ""; 1083 1084 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, 1085 suffix); 1086 mem = fdt_getprop(blob, config_node, prop_name, NULL); 1087 if (!mem) { 1088 debug("%s: No memory type for '%s', using /memory\n", __func__, 1089 prop_name); 1090 mem = "/memory"; 1091 } 1092 1093 node = fdt_path_offset(blob, mem); 1094 if (node < 0) { 1095 debug("%s: Failed to find node '%s': %s\n", __func__, mem, 1096 fdt_strerror(node)); 1097 return -ENOENT; 1098 } 1099 1100 /* 1101 * Not strictly correct - the memory may have multiple banks. We just 1102 * use the first 1103 */ 1104 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { 1105 debug("%s: Failed to decode memory region %s\n", __func__, 1106 mem); 1107 return -EINVAL; 1108 } 1109 1110 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, 1111 suffix); 1112 if (fdtdec_decode_region(blob, config_node, prop_name, &offset, 1113 &offset_size)) { 1114 debug("%s: Failed to decode memory region '%s'\n", __func__, 1115 prop_name); 1116 return -EINVAL; 1117 } 1118 1119 *basep = base + offset; 1120 *sizep = offset_size; 1121 1122 return 0; 1123 } 1124 1125 static int decode_timing_property(const void *blob, int node, const char *name, 1126 struct timing_entry *result) 1127 { 1128 int length, ret = 0; 1129 const u32 *prop; 1130 1131 prop = fdt_getprop(blob, node, name, &length); 1132 if (!prop) { 1133 debug("%s: could not find property %s\n", 1134 fdt_get_name(blob, node, NULL), name); 1135 return length; 1136 } 1137 1138 if (length == sizeof(u32)) { 1139 result->typ = fdtdec_get_int(blob, node, name, 0); 1140 result->min = result->typ; 1141 result->max = result->typ; 1142 } else { 1143 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3); 1144 } 1145 1146 return ret; 1147 } 1148 1149 int fdtdec_decode_display_timing(const void *blob, int parent, int index, 1150 struct display_timing *dt) 1151 { 1152 int i, node, timings_node; 1153 u32 val = 0; 1154 int ret = 0; 1155 1156 timings_node = fdt_subnode_offset(blob, parent, "display-timings"); 1157 if (timings_node < 0) 1158 return timings_node; 1159 1160 for (i = 0, node = fdt_first_subnode(blob, timings_node); 1161 node > 0 && i != index; 1162 node = fdt_next_subnode(blob, node)) 1163 i++; 1164 1165 if (node < 0) 1166 return node; 1167 1168 memset(dt, 0, sizeof(*dt)); 1169 1170 ret |= decode_timing_property(blob, node, "hback-porch", 1171 &dt->hback_porch); 1172 ret |= decode_timing_property(blob, node, "hfront-porch", 1173 &dt->hfront_porch); 1174 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive); 1175 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len); 1176 ret |= decode_timing_property(blob, node, "vback-porch", 1177 &dt->vback_porch); 1178 ret |= decode_timing_property(blob, node, "vfront-porch", 1179 &dt->vfront_porch); 1180 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive); 1181 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len); 1182 ret |= decode_timing_property(blob, node, "clock-frequency", 1183 &dt->pixelclock); 1184 1185 dt->flags = 0; 1186 val = fdtdec_get_int(blob, node, "vsync-active", -1); 1187 if (val != -1) { 1188 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : 1189 DISPLAY_FLAGS_VSYNC_LOW; 1190 } 1191 val = fdtdec_get_int(blob, node, "hsync-active", -1); 1192 if (val != -1) { 1193 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : 1194 DISPLAY_FLAGS_HSYNC_LOW; 1195 } 1196 val = fdtdec_get_int(blob, node, "de-active", -1); 1197 if (val != -1) { 1198 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : 1199 DISPLAY_FLAGS_DE_LOW; 1200 } 1201 val = fdtdec_get_int(blob, node, "pixelclk-active", -1); 1202 if (val != -1) { 1203 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : 1204 DISPLAY_FLAGS_PIXDATA_NEGEDGE; 1205 } 1206 1207 if (fdtdec_get_bool(blob, node, "interlaced")) 1208 dt->flags |= DISPLAY_FLAGS_INTERLACED; 1209 if (fdtdec_get_bool(blob, node, "doublescan")) 1210 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; 1211 if (fdtdec_get_bool(blob, node, "doubleclk")) 1212 dt->flags |= DISPLAY_FLAGS_DOUBLECLK; 1213 1214 return 0; 1215 } 1216 1217 int fdtdec_setup(void) 1218 { 1219 #if CONFIG_IS_ENABLED(OF_CONTROL) 1220 # ifdef CONFIG_OF_EMBED 1221 /* Get a pointer to the FDT */ 1222 gd->fdt_blob = __dtb_dt_begin; 1223 # elif defined CONFIG_OF_SEPARATE 1224 # ifdef CONFIG_SPL_BUILD 1225 /* FDT is at end of BSS unless it is in a different memory region */ 1226 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) 1227 gd->fdt_blob = (ulong *)&_image_binary_end; 1228 else 1229 gd->fdt_blob = (ulong *)&__bss_end; 1230 # else 1231 /* FDT is at end of image */ 1232 gd->fdt_blob = (ulong *)&_end; 1233 # endif 1234 # elif defined(CONFIG_OF_HOSTFILE) 1235 if (sandbox_read_fdt_from_file()) { 1236 puts("Failed to read control FDT\n"); 1237 return -1; 1238 } 1239 # endif 1240 # ifndef CONFIG_SPL_BUILD 1241 /* Allow the early environment to override the fdt address */ 1242 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, 1243 (uintptr_t)gd->fdt_blob); 1244 # endif 1245 #endif 1246 return fdtdec_prepare_fdt(); 1247 } 1248 1249 #endif /* !USE_HOSTCC */ 1250