2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/sections.h>
13 #include <linux/ctype.h>
15 DECLARE_GLOBAL_DATA_PTR;
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.
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_KBC, "nvidia,tegra20-kbc"),
28 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
29 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
30 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"),
31 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"),
32 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
33 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
34 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
35 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
36 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
37 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
38 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-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"),
82 const char *fdtdec_get_compatible(enum fdt_compat_id id)
84 /* We allow reading of the 'unknown' ID for testing purposes */
85 assert(id >= 0 && id < COMPAT_COUNT);
86 return compat_names[id];
89 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
90 const char *prop_name, fdt_size_t *sizep)
92 const fdt_addr_t *cell;
95 debug("%s: %s: ", __func__, prop_name);
96 cell = fdt_getprop(blob, node, prop_name, &len);
97 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
98 len == sizeof(fdt_addr_t) * 2)) {
99 fdt_addr_t addr = fdt_addr_to_cpu(*cell);
101 const fdt_size_t *size;
103 size = (fdt_size_t *)((char *)cell +
105 *sizep = fdt_size_to_cpu(*size);
106 debug("addr=%08lx, size=%llx\n",
107 (ulong)addr, (u64)*sizep);
109 debug("%08lx\n", (ulong)addr);
113 debug("(not found)\n");
114 return FDT_ADDR_T_NONE;
117 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
118 const char *prop_name)
120 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
124 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
125 const char *prop_name, struct fdt_pci_addr *addr)
131 debug("%s: %s: ", __func__, prop_name);
134 * If we follow the pci bus bindings strictly, we should check
135 * the value of the node's parent node's #address-cells and
136 * #size-cells. They need to be 3 and 2 accordingly. However,
137 * for simplicity we skip the check here.
139 cell = fdt_getprop(blob, node, prop_name, &len);
143 if ((len % FDT_PCI_REG_SIZE) == 0) {
144 int num = len / FDT_PCI_REG_SIZE;
147 for (i = 0; i < num; i++) {
148 debug("pci address #%d: %08lx %08lx %08lx\n", i,
149 (ulong)fdt_addr_to_cpu(cell[0]),
150 (ulong)fdt_addr_to_cpu(cell[1]),
151 (ulong)fdt_addr_to_cpu(cell[2]));
152 if ((fdt_addr_to_cpu(*cell) & type) == type) {
153 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
154 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
155 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
158 cell += (FDT_PCI_ADDR_CELLS +
174 debug("(not found)\n");
178 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
180 const char *list, *end;
183 list = fdt_getprop(blob, node, "compatible", &len);
192 if (len >= strlen("pciVVVV,DDDD")) {
193 s = strstr(list, "pci");
196 * check if the string is something like pciVVVV,DDDD.RR
197 * or just pciVVVV,DDDD
199 if (s && s[7] == ',' &&
200 (s[12] == '.' || s[12] == 0)) {
202 *vendor = simple_strtol(s, NULL, 16);
205 *device = simple_strtol(s, NULL, 16);
216 int fdtdec_get_pci_bdf(const void *blob, int node,
217 struct fdt_pci_addr *addr, pci_dev_t *bdf)
219 u16 dt_vendor, dt_device, vendor, device;
222 /* get vendor id & device id from the compatible string */
223 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
227 /* extract the bdf from fdt_pci_addr */
228 *bdf = addr->phys_hi & 0xffff00;
230 /* read vendor id & device id based on bdf */
231 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
232 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
235 * Note there are two places in the device tree to fully describe
236 * a pci device: one is via compatible string with a format of
237 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
238 * the device node's reg address property. We read the vendor id
239 * and device id based on bdf and compare the values with the
240 * "VVVV,DDDD". If they are the same, then we are good to use bdf
241 * to read device's bar. But if they are different, we have to rely
242 * on the vendor id and device id extracted from the compatible
243 * string and locate the real bdf by pci_find_device(). This is
244 * because normally we may only know device's device number and
245 * function number when writing device tree. The bus number is
246 * dynamically assigned during the pci enumeration process.
248 if ((dt_vendor != vendor) || (dt_device != device)) {
249 *bdf = pci_find_device(dt_vendor, dt_device, 0);
257 int fdtdec_get_pci_bar32(const void *blob, int node,
258 struct fdt_pci_addr *addr, u32 *bar)
264 /* get pci devices's bdf */
265 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
269 /* extract the bar number from fdt_pci_addr */
270 barnum = addr->phys_hi & 0xff;
271 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
274 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
275 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
281 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
282 uint64_t default_val)
284 const uint64_t *cell64;
287 cell64 = fdt_getprop(blob, node, prop_name, &length);
288 if (!cell64 || length < sizeof(*cell64))
291 return fdt64_to_cpu(*cell64);
294 int fdtdec_get_is_enabled(const void *blob, int node)
299 * It should say "okay", so only allow that. Some fdts use "ok" but
300 * this is a bug. Please fix your device tree source file. See here
303 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
305 cell = fdt_getprop(blob, node, "status", NULL);
307 return 0 == strcmp(cell, "okay");
311 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
313 enum fdt_compat_id id;
315 /* Search our drivers */
316 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
317 if (0 == fdt_node_check_compatible(blob, node,
320 return COMPAT_UNKNOWN;
323 int fdtdec_next_compatible(const void *blob, int node,
324 enum fdt_compat_id id)
326 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
329 int fdtdec_next_compatible_subnode(const void *blob, int node,
330 enum fdt_compat_id id, int *depthp)
333 node = fdt_next_node(blob, node, depthp);
334 } while (*depthp > 1);
336 /* If this is a direct subnode, and compatible, return it */
337 if (*depthp == 1 && 0 == fdt_node_check_compatible(
338 blob, node, compat_names[id]))
341 return -FDT_ERR_NOTFOUND;
344 int fdtdec_next_alias(const void *blob, const char *name,
345 enum fdt_compat_id id, int *upto)
347 #define MAX_STR_LEN 20
348 char str[MAX_STR_LEN + 20];
351 /* snprintf() is not available */
352 assert(strlen(name) < MAX_STR_LEN);
353 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
354 node = fdt_path_offset(blob, str);
357 err = fdt_node_check_compatible(blob, node, compat_names[id]);
361 return -FDT_ERR_NOTFOUND;
366 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
367 enum fdt_compat_id id, int *node_list, int maxcount)
369 memset(node_list, '\0', sizeof(*node_list) * maxcount);
371 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
374 /* TODO: Can we tighten this code up a little? */
375 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
376 enum fdt_compat_id id, int *node_list, int maxcount)
378 int name_len = strlen(name);
386 /* find the alias node if present */
387 alias_node = fdt_path_offset(blob, "/aliases");
390 * start with nothing, and we can assume that the root node can't
393 memset(nodes, '\0', sizeof(nodes));
395 /* First find all the compatible nodes */
396 for (node = count = 0; node >= 0 && count < maxcount;) {
397 node = fdtdec_next_compatible(blob, node, id);
399 nodes[count++] = node;
402 debug("%s: warning: maxcount exceeded with alias '%s'\n",
405 /* Now find all the aliases */
406 for (offset = fdt_first_property_offset(blob, alias_node);
408 offset = fdt_next_property_offset(blob, offset)) {
409 const struct fdt_property *prop;
415 prop = fdt_get_property_by_offset(blob, offset, NULL);
416 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
417 if (prop->len && 0 == strncmp(path, name, name_len))
418 node = fdt_path_offset(blob, prop->data);
422 /* Get the alias number */
423 number = simple_strtoul(path + name_len, NULL, 10);
424 if (number < 0 || number >= maxcount) {
425 debug("%s: warning: alias '%s' is out of range\n",
430 /* Make sure the node we found is actually in our list! */
432 for (j = 0; j < count; j++)
433 if (nodes[j] == node) {
439 debug("%s: warning: alias '%s' points to a node "
440 "'%s' that is missing or is not compatible "
441 " with '%s'\n", __func__, path,
442 fdt_get_name(blob, node, NULL),
448 * Add this node to our list in the right place, and mark
451 if (fdtdec_get_is_enabled(blob, node)) {
452 if (node_list[number]) {
453 debug("%s: warning: alias '%s' requires that "
454 "a node be placed in the list in a "
455 "position which is already filled by "
456 "node '%s'\n", __func__, path,
457 fdt_get_name(blob, node, NULL));
460 node_list[number] = node;
461 if (number >= num_found)
462 num_found = number + 1;
467 /* Add any nodes not mentioned by an alias */
468 for (i = j = 0; i < maxcount; i++) {
470 for (; j < maxcount; j++)
472 fdtdec_get_is_enabled(blob, nodes[j]))
475 /* Have we run out of nodes to add? */
479 assert(!node_list[i]);
480 node_list[i] = nodes[j++];
489 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
492 int base_len = strlen(base);
493 const char *find_name;
498 find_name = fdt_get_name(blob, offset, &find_namelen);
499 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
501 aliases = fdt_path_offset(blob, "/aliases");
502 for (prop_offset = fdt_first_property_offset(blob, aliases);
504 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
510 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
511 debug(" - %s, %s\n", name, prop);
512 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
513 strncmp(name, base, base_len))
516 slash = strrchr(prop, '/');
517 if (strcmp(slash + 1, find_name))
519 val = trailing_strtol(name);
522 debug("Found seq %d\n", *seqp);
527 debug("Not found\n");
531 int fdtdec_get_chosen_node(const void *blob, const char *name)
538 return -FDT_ERR_NOTFOUND;
539 chosen_node = fdt_path_offset(blob, "/chosen");
540 prop = fdt_getprop(blob, chosen_node, name, &len);
542 return -FDT_ERR_NOTFOUND;
543 return fdt_path_offset(blob, prop);
546 int fdtdec_check_fdt(void)
549 * We must have an FDT, but we cannot panic() yet since the console
550 * is not ready. So for now, just assert(). Boards which need an early
551 * FDT (prior to console ready) will need to make their own
552 * arrangements and do their own checks.
554 assert(!fdtdec_prepare_fdt());
559 * This function is a little odd in that it accesses global data. At some
560 * point if the architecture board.c files merge this will make more sense.
561 * Even now, it is common code.
563 int fdtdec_prepare_fdt(void)
565 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
566 fdt_check_header(gd->fdt_blob)) {
567 #ifdef CONFIG_SPL_BUILD
568 puts("Missing DTB\n");
570 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");
573 printf("fdt_blob=%p\n", gd->fdt_blob);
574 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
584 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
589 debug("%s: %s\n", __func__, prop_name);
590 phandle = fdt_getprop(blob, node, prop_name, NULL);
592 return -FDT_ERR_NOTFOUND;
594 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
599 * Look up a property in a node and check that it has a minimum length.
601 * @param blob FDT blob
602 * @param node node to examine
603 * @param prop_name name of property to find
604 * @param min_len minimum property length in bytes
605 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
606 found, or -FDT_ERR_BADLAYOUT if not enough data
607 * @return pointer to cell, which is only valid if err == 0
609 static const void *get_prop_check_min_len(const void *blob, int node,
610 const char *prop_name, int min_len, int *err)
615 debug("%s: %s\n", __func__, prop_name);
616 cell = fdt_getprop(blob, node, prop_name, &len);
618 *err = -FDT_ERR_NOTFOUND;
619 else if (len < min_len)
620 *err = -FDT_ERR_BADLAYOUT;
626 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
627 u32 *array, int count)
632 debug("%s: %s\n", __func__, prop_name);
633 cell = get_prop_check_min_len(blob, node, prop_name,
634 sizeof(u32) * count, &err);
636 for (i = 0; i < count; i++)
637 array[i] = fdt32_to_cpu(cell[i]);
642 int fdtdec_get_int_array_count(const void *blob, int node,
643 const char *prop_name, u32 *array, int count)
649 debug("%s: %s\n", __func__, prop_name);
650 cell = fdt_getprop(blob, node, prop_name, &len);
652 return -FDT_ERR_NOTFOUND;
653 elems = len / sizeof(u32);
656 for (i = 0; i < count; i++)
657 array[i] = fdt32_to_cpu(cell[i]);
662 const u32 *fdtdec_locate_array(const void *blob, int node,
663 const char *prop_name, int count)
668 cell = get_prop_check_min_len(blob, node, prop_name,
669 sizeof(u32) * count, &err);
670 return err ? NULL : cell;
673 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
678 debug("%s: %s\n", __func__, prop_name);
679 cell = fdt_getprop(blob, node, prop_name, &len);
683 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
684 const char *list_name,
685 const char *cells_name,
686 int cell_count, int index,
687 struct fdtdec_phandle_args *out_args)
689 const __be32 *list, *list_end;
690 int rc = 0, size, cur_index = 0;
695 /* Retrieve the phandle list property */
696 list = fdt_getprop(blob, src_node, list_name, &size);
699 list_end = list + size / sizeof(*list);
701 /* Loop over the phandles until all the requested entry is found */
702 while (list < list_end) {
707 * If phandle is 0, then it is an empty entry with no
708 * arguments. Skip forward to the next entry.
710 phandle = be32_to_cpup(list++);
713 * Find the provider node and parse the #*-cells
714 * property to determine the argument length.
716 * This is not needed if the cell count is hard-coded
717 * (i.e. cells_name not set, but cell_count is set),
718 * except when we're going to return the found node
721 if (cells_name || cur_index == index) {
722 node = fdt_node_offset_by_phandle(blob,
725 debug("%s: could not find phandle\n",
726 fdt_get_name(blob, src_node,
733 count = fdtdec_get_int(blob, node, cells_name,
736 debug("%s: could not get %s for %s\n",
737 fdt_get_name(blob, src_node,
740 fdt_get_name(blob, node,
749 * Make sure that the arguments actually fit in the
750 * remaining property data length
752 if (list + count > list_end) {
753 debug("%s: arguments longer than property\n",
754 fdt_get_name(blob, src_node, NULL));
760 * All of the error cases above bail out of the loop, so at
761 * this point, the parsing is successful. If the requested
762 * index matches, then fill the out_args structure and return,
763 * or return -ENOENT for an empty entry.
766 if (cur_index == index) {
773 if (count > MAX_PHANDLE_ARGS) {
774 debug("%s: too many arguments %d\n",
775 fdt_get_name(blob, src_node,
777 count = MAX_PHANDLE_ARGS;
779 out_args->node = node;
780 out_args->args_count = count;
781 for (i = 0; i < count; i++) {
783 be32_to_cpup(list++);
787 /* Found it! return success */
797 * Result will be one of:
798 * -ENOENT : index is for empty phandle
799 * -EINVAL : parsing error on data
800 * [1..n] : Number of phandle (count mode; when index = -1)
802 rc = index < 0 ? cur_index : -ENOENT;
807 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
808 u8 *array, int count)
813 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
815 memcpy(array, cell, count);
819 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
820 const char *prop_name, int count)
825 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
831 int fdtdec_get_config_int(const void *blob, const char *prop_name,
836 debug("%s: %s\n", __func__, prop_name);
837 config_node = fdt_path_offset(blob, "/config");
840 return fdtdec_get_int(blob, config_node, prop_name, default_val);
843 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
848 debug("%s: %s\n", __func__, prop_name);
849 config_node = fdt_path_offset(blob, "/config");
852 prop = fdt_get_property(blob, config_node, prop_name, NULL);
857 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
863 debug("%s: %s\n", __func__, prop_name);
864 nodeoffset = fdt_path_offset(blob, "/config");
868 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
872 return (char *)nodep;
875 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
876 fdt_addr_t *basep, fdt_size_t *sizep)
878 const fdt_addr_t *cell;
881 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
883 cell = fdt_getprop(blob, node, prop_name, &len);
884 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
885 debug("cell=%p, len=%d\n", cell, len);
889 *basep = fdt_addr_to_cpu(*cell);
890 *sizep = fdt_size_to_cpu(cell[1]);
891 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
898 * Read a flash entry from the fdt
900 * @param blob FDT blob
901 * @param node Offset of node to read
902 * @param name Name of node being read
903 * @param entry Place to put offset and size of this node
904 * @return 0 if ok, -ve on error
906 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
907 struct fmap_entry *entry)
912 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
913 debug("Node '%s' has bad/missing 'reg' property\n", name);
914 return -FDT_ERR_NOTFOUND;
916 entry->offset = reg[0];
917 entry->length = reg[1];
918 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
919 prop = fdt_getprop(blob, node, "compress", NULL);
920 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
921 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
922 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
923 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
924 entry->hash = (uint8_t *)prop;
929 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
934 number = (number << 32) | fdt32_to_cpu(*ptr++);
939 int fdt_get_resource(const void *fdt, int node, const char *property,
940 unsigned int index, struct fdt_resource *res)
942 const fdt32_t *ptr, *end;
943 int na, ns, len, parent;
946 parent = fdt_parent_offset(fdt, node);
950 na = fdt_address_cells(fdt, parent);
951 ns = fdt_size_cells(fdt, parent);
953 ptr = fdt_getprop(fdt, node, property, &len);
957 end = ptr + len / sizeof(*ptr);
959 while (ptr + na + ns <= end) {
961 res->start = res->end = fdtdec_get_number(ptr, na);
962 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
970 return -FDT_ERR_NOTFOUND;
973 int fdt_get_named_resource(const void *fdt, int node, const char *property,
974 const char *prop_names, const char *name,
975 struct fdt_resource *res)
979 index = fdt_find_string(fdt, node, prop_names, name);
983 return fdt_get_resource(fdt, node, property, index, res);
986 int fdtdec_decode_memory_region(const void *blob, int config_node,
987 const char *mem_type, const char *suffix,
988 fdt_addr_t *basep, fdt_size_t *sizep)
992 fdt_size_t size, offset_size;
993 fdt_addr_t base, offset;
996 if (config_node == -1) {
997 config_node = fdt_path_offset(blob, "/config");
998 if (config_node < 0) {
999 debug("%s: Cannot find /config node\n", __func__);
1006 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1008 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1010 debug("%s: No memory type for '%s', using /memory\n", __func__,
1015 node = fdt_path_offset(blob, mem);
1017 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1018 fdt_strerror(node));
1023 * Not strictly correct - the memory may have multiple banks. We just
1026 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1027 debug("%s: Failed to decode memory region %s\n", __func__,
1032 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1034 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1036 debug("%s: Failed to decode memory region '%s'\n", __func__,
1041 *basep = base + offset;
1042 *sizep = offset_size;
1047 static int decode_timing_property(const void *blob, int node, const char *name,
1048 struct timing_entry *result)
1050 int length, ret = 0;
1053 prop = fdt_getprop(blob, node, name, &length);
1055 debug("%s: could not find property %s\n",
1056 fdt_get_name(blob, node, NULL), name);
1060 if (length == sizeof(u32)) {
1061 result->typ = fdtdec_get_int(blob, node, name, 0);
1062 result->min = result->typ;
1063 result->max = result->typ;
1065 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1071 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1072 struct display_timing *dt)
1074 int i, node, timings_node;
1078 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1079 if (timings_node < 0)
1080 return timings_node;
1082 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1083 node > 0 && i != index;
1084 node = fdt_next_subnode(blob, node))
1090 memset(dt, 0, sizeof(*dt));
1092 ret |= decode_timing_property(blob, node, "hback-porch",
1094 ret |= decode_timing_property(blob, node, "hfront-porch",
1096 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1097 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1098 ret |= decode_timing_property(blob, node, "vback-porch",
1100 ret |= decode_timing_property(blob, node, "vfront-porch",
1102 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1103 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1104 ret |= decode_timing_property(blob, node, "clock-frequency",
1108 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1110 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1111 DISPLAY_FLAGS_VSYNC_LOW;
1113 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1115 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1116 DISPLAY_FLAGS_HSYNC_LOW;
1118 val = fdtdec_get_int(blob, node, "de-active", -1);
1120 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1121 DISPLAY_FLAGS_DE_LOW;
1123 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1125 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1126 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1129 if (fdtdec_get_bool(blob, node, "interlaced"))
1130 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1131 if (fdtdec_get_bool(blob, node, "doublescan"))
1132 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1133 if (fdtdec_get_bool(blob, node, "doubleclk"))
1134 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1139 int fdtdec_setup(void)
1141 #if CONFIG_IS_ENABLED(OF_CONTROL)
1142 # ifdef CONFIG_OF_EMBED
1143 /* Get a pointer to the FDT */
1144 gd->fdt_blob = __dtb_dt_begin;
1145 # elif defined CONFIG_OF_SEPARATE
1146 # ifdef CONFIG_SPL_BUILD
1147 /* FDT is at end of BSS */
1148 gd->fdt_blob = (ulong *)&__bss_end;
1150 /* FDT is at end of image */
1151 gd->fdt_blob = (ulong *)&_end;
1153 # elif defined(CONFIG_OF_HOSTFILE)
1154 if (sandbox_read_fdt_from_file()) {
1155 puts("Failed to read control FDT\n");
1159 # ifndef CONFIG_SPL_BUILD
1160 /* Allow the early environment to override the fdt address */
1161 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1162 (uintptr_t)gd->fdt_blob);
1165 return fdtdec_prepare_fdt();
1168 #endif /* !USE_HOSTCC */