2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/sections.h>
14 #include <linux/ctype.h>
16 DECLARE_GLOBAL_DATA_PTR;
19 * Here are the type we know about. One day we might allow drivers to
20 * register. For now we just put them here. The COMPAT macro allows us to
21 * turn this into a sparse list later, and keeps the ID with the name.
23 #define COMPAT(id, name) name
24 static const char * const compat_names[COMPAT_COUNT] = {
25 COMPAT(UNKNOWN, "<none>"),
26 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
27 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
28 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
29 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
30 COMPAT(NVIDIA_TEGRA186_SDMMC, "nvidia,tegra186-sdhci"),
31 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
32 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
33 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
34 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
35 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
36 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
37 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
38 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
39 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
40 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
41 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
42 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
43 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
44 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
45 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
46 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
47 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
48 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
49 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
50 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
51 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
52 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
53 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
54 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
55 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
56 COMPAT(INTEL_MICROCODE, "intel,microcode"),
57 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
58 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
59 COMPAT(INTEL_GMA, "intel,gma"),
60 COMPAT(AMS_AS3722, "ams,as3722"),
61 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
62 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
63 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
64 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
65 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
66 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
67 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
68 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
69 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
70 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
73 const char *fdtdec_get_compatible(enum fdt_compat_id id)
75 /* We allow reading of the 'unknown' ID for testing purposes */
76 assert(id >= 0 && id < COMPAT_COUNT);
77 return compat_names[id];
80 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
81 const char *prop_name, int index, int na, int ns,
84 const fdt32_t *prop, *prop_end;
85 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
89 debug("%s: %s: ", __func__, prop_name);
91 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
92 debug("(na too large for fdt_addr_t type)\n");
93 return FDT_ADDR_T_NONE;
96 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
97 debug("(ns too large for fdt_size_t type)\n");
98 return FDT_ADDR_T_NONE;
101 prop = fdt_getprop(blob, node, prop_name, &len);
103 debug("(not found)\n");
104 return FDT_ADDR_T_NONE;
106 prop_end = prop + (len / sizeof(*prop));
108 prop_addr = prop + (index * (na + ns));
109 prop_size = prop_addr + na;
110 prop_after_size = prop_size + ns;
111 if (prop_after_size > prop_end) {
112 debug("(not enough data: expected >= %d cells, got %d cells)\n",
113 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
114 return FDT_ADDR_T_NONE;
117 addr = fdtdec_get_number(prop_addr, na);
120 *sizep = fdtdec_get_number(prop_size, ns);
121 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
122 (unsigned long long)*sizep);
124 debug("addr=%08llx\n", (unsigned long long)addr);
130 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
131 int node, const char *prop_name, int index, fdt_size_t *sizep)
135 debug("%s: ", __func__);
137 na = fdt_address_cells(blob, parent);
139 debug("(bad #address-cells)\n");
140 return FDT_ADDR_T_NONE;
143 ns = fdt_size_cells(blob, parent);
145 debug("(bad #size-cells)\n");
146 return FDT_ADDR_T_NONE;
149 debug("na=%d, ns=%d, ", na, ns);
151 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
155 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
156 const char *prop_name, int index, fdt_size_t *sizep)
160 debug("%s: ", __func__);
162 parent = fdt_parent_offset(blob, node);
164 debug("(no parent found)\n");
165 return FDT_ADDR_T_NONE;
168 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
172 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
173 const char *prop_name, fdt_size_t *sizep)
175 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
177 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
178 sizeof(fdt_addr_t) / sizeof(fdt32_t),
182 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
183 const char *prop_name)
185 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
188 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
189 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
190 const char *prop_name, struct fdt_pci_addr *addr)
196 debug("%s: %s: ", __func__, prop_name);
199 * If we follow the pci bus bindings strictly, we should check
200 * the value of the node's parent node's #address-cells and
201 * #size-cells. They need to be 3 and 2 accordingly. However,
202 * for simplicity we skip the check here.
204 cell = fdt_getprop(blob, node, prop_name, &len);
208 if ((len % FDT_PCI_REG_SIZE) == 0) {
209 int num = len / FDT_PCI_REG_SIZE;
212 for (i = 0; i < num; i++) {
213 debug("pci address #%d: %08lx %08lx %08lx\n", i,
214 (ulong)fdt32_to_cpu(cell[0]),
215 (ulong)fdt32_to_cpu(cell[1]),
216 (ulong)fdt32_to_cpu(cell[2]));
217 if ((fdt32_to_cpu(*cell) & type) == type) {
218 addr->phys_hi = fdt32_to_cpu(cell[0]);
219 addr->phys_mid = fdt32_to_cpu(cell[1]);
220 addr->phys_lo = fdt32_to_cpu(cell[1]);
223 cell += (FDT_PCI_ADDR_CELLS +
239 debug("(not found)\n");
243 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
245 const char *list, *end;
248 list = fdt_getprop(blob, node, "compatible", &len);
257 if (len >= strlen("pciVVVV,DDDD")) {
258 s = strstr(list, "pci");
261 * check if the string is something like pciVVVV,DDDD.RR
262 * or just pciVVVV,DDDD
264 if (s && s[7] == ',' &&
265 (s[12] == '.' || s[12] == 0)) {
267 *vendor = simple_strtol(s, NULL, 16);
270 *device = simple_strtol(s, NULL, 16);
281 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
286 /* extract the bar number from fdt_pci_addr */
287 barnum = addr->phys_hi & 0xff;
288 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
291 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
292 *bar = dm_pci_read_bar32(dev, barnum);
298 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
299 uint64_t default_val)
301 const uint64_t *cell64;
304 cell64 = fdt_getprop(blob, node, prop_name, &length);
305 if (!cell64 || length < sizeof(*cell64))
308 return fdt64_to_cpu(*cell64);
311 int fdtdec_get_is_enabled(const void *blob, int node)
316 * It should say "okay", so only allow that. Some fdts use "ok" but
317 * this is a bug. Please fix your device tree source file. See here
320 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
322 cell = fdt_getprop(blob, node, "status", NULL);
324 return 0 == strcmp(cell, "okay");
328 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
330 enum fdt_compat_id id;
332 /* Search our drivers */
333 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
334 if (0 == fdt_node_check_compatible(blob, node,
337 return COMPAT_UNKNOWN;
340 int fdtdec_next_compatible(const void *blob, int node,
341 enum fdt_compat_id id)
343 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
346 int fdtdec_next_compatible_subnode(const void *blob, int node,
347 enum fdt_compat_id id, int *depthp)
350 node = fdt_next_node(blob, node, depthp);
351 } while (*depthp > 1);
353 /* If this is a direct subnode, and compatible, return it */
354 if (*depthp == 1 && 0 == fdt_node_check_compatible(
355 blob, node, compat_names[id]))
358 return -FDT_ERR_NOTFOUND;
361 int fdtdec_next_alias(const void *blob, const char *name,
362 enum fdt_compat_id id, int *upto)
364 #define MAX_STR_LEN 20
365 char str[MAX_STR_LEN + 20];
368 /* snprintf() is not available */
369 assert(strlen(name) < MAX_STR_LEN);
370 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
371 node = fdt_path_offset(blob, str);
374 err = fdt_node_check_compatible(blob, node, compat_names[id]);
378 return -FDT_ERR_NOTFOUND;
383 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
384 enum fdt_compat_id id, int *node_list, int maxcount)
386 memset(node_list, '\0', sizeof(*node_list) * maxcount);
388 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
391 /* TODO: Can we tighten this code up a little? */
392 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
393 enum fdt_compat_id id, int *node_list, int maxcount)
395 int name_len = strlen(name);
403 /* find the alias node if present */
404 alias_node = fdt_path_offset(blob, "/aliases");
407 * start with nothing, and we can assume that the root node can't
410 memset(nodes, '\0', sizeof(nodes));
412 /* First find all the compatible nodes */
413 for (node = count = 0; node >= 0 && count < maxcount;) {
414 node = fdtdec_next_compatible(blob, node, id);
416 nodes[count++] = node;
419 debug("%s: warning: maxcount exceeded with alias '%s'\n",
422 /* Now find all the aliases */
423 for (offset = fdt_first_property_offset(blob, alias_node);
425 offset = fdt_next_property_offset(blob, offset)) {
426 const struct fdt_property *prop;
432 prop = fdt_get_property_by_offset(blob, offset, NULL);
433 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
434 if (prop->len && 0 == strncmp(path, name, name_len))
435 node = fdt_path_offset(blob, prop->data);
439 /* Get the alias number */
440 number = simple_strtoul(path + name_len, NULL, 10);
441 if (number < 0 || number >= maxcount) {
442 debug("%s: warning: alias '%s' is out of range\n",
447 /* Make sure the node we found is actually in our list! */
449 for (j = 0; j < count; j++)
450 if (nodes[j] == node) {
456 debug("%s: warning: alias '%s' points to a node "
457 "'%s' that is missing or is not compatible "
458 " with '%s'\n", __func__, path,
459 fdt_get_name(blob, node, NULL),
465 * Add this node to our list in the right place, and mark
468 if (fdtdec_get_is_enabled(blob, node)) {
469 if (node_list[number]) {
470 debug("%s: warning: alias '%s' requires that "
471 "a node be placed in the list in a "
472 "position which is already filled by "
473 "node '%s'\n", __func__, path,
474 fdt_get_name(blob, node, NULL));
477 node_list[number] = node;
478 if (number >= num_found)
479 num_found = number + 1;
484 /* Add any nodes not mentioned by an alias */
485 for (i = j = 0; i < maxcount; i++) {
487 for (; j < maxcount; j++)
489 fdtdec_get_is_enabled(blob, nodes[j]))
492 /* Have we run out of nodes to add? */
496 assert(!node_list[i]);
497 node_list[i] = nodes[j++];
506 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
509 int base_len = strlen(base);
510 const char *find_name;
515 find_name = fdt_get_name(blob, offset, &find_namelen);
516 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
518 aliases = fdt_path_offset(blob, "/aliases");
519 for (prop_offset = fdt_first_property_offset(blob, aliases);
521 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
527 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
528 debug(" - %s, %s\n", name, prop);
529 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
530 strncmp(name, base, base_len))
533 slash = strrchr(prop, '/');
534 if (strcmp(slash + 1, find_name))
536 val = trailing_strtol(name);
539 debug("Found seq %d\n", *seqp);
544 debug("Not found\n");
548 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
554 chosen_node = fdt_path_offset(blob, "/chosen");
555 return fdt_getprop(blob, chosen_node, name, NULL);
558 int fdtdec_get_chosen_node(const void *blob, const char *name)
562 prop = fdtdec_get_chosen_prop(blob, name);
564 return -FDT_ERR_NOTFOUND;
565 return fdt_path_offset(blob, prop);
568 int fdtdec_check_fdt(void)
571 * We must have an FDT, but we cannot panic() yet since the console
572 * is not ready. So for now, just assert(). Boards which need an early
573 * FDT (prior to console ready) will need to make their own
574 * arrangements and do their own checks.
576 assert(!fdtdec_prepare_fdt());
581 * This function is a little odd in that it accesses global data. At some
582 * point if the architecture board.c files merge this will make more sense.
583 * Even now, it is common code.
585 int fdtdec_prepare_fdt(void)
587 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
588 fdt_check_header(gd->fdt_blob)) {
589 #ifdef CONFIG_SPL_BUILD
590 puts("Missing DTB\n");
592 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");
595 printf("fdt_blob=%p\n", gd->fdt_blob);
596 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
606 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
611 debug("%s: %s\n", __func__, prop_name);
612 phandle = fdt_getprop(blob, node, prop_name, NULL);
614 return -FDT_ERR_NOTFOUND;
616 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
621 * Look up a property in a node and check that it has a minimum length.
623 * @param blob FDT blob
624 * @param node node to examine
625 * @param prop_name name of property to find
626 * @param min_len minimum property length in bytes
627 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
628 found, or -FDT_ERR_BADLAYOUT if not enough data
629 * @return pointer to cell, which is only valid if err == 0
631 static const void *get_prop_check_min_len(const void *blob, int node,
632 const char *prop_name, int min_len, int *err)
637 debug("%s: %s\n", __func__, prop_name);
638 cell = fdt_getprop(blob, node, prop_name, &len);
640 *err = -FDT_ERR_NOTFOUND;
641 else if (len < min_len)
642 *err = -FDT_ERR_BADLAYOUT;
648 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
649 u32 *array, int count)
654 debug("%s: %s\n", __func__, prop_name);
655 cell = get_prop_check_min_len(blob, node, prop_name,
656 sizeof(u32) * count, &err);
658 for (i = 0; i < count; i++)
659 array[i] = fdt32_to_cpu(cell[i]);
664 int fdtdec_get_int_array_count(const void *blob, int node,
665 const char *prop_name, u32 *array, int count)
671 debug("%s: %s\n", __func__, prop_name);
672 cell = fdt_getprop(blob, node, prop_name, &len);
674 return -FDT_ERR_NOTFOUND;
675 elems = len / sizeof(u32);
678 for (i = 0; i < count; i++)
679 array[i] = fdt32_to_cpu(cell[i]);
684 const u32 *fdtdec_locate_array(const void *blob, int node,
685 const char *prop_name, int count)
690 cell = get_prop_check_min_len(blob, node, prop_name,
691 sizeof(u32) * count, &err);
692 return err ? NULL : cell;
695 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
700 debug("%s: %s\n", __func__, prop_name);
701 cell = fdt_getprop(blob, node, prop_name, &len);
705 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
706 const char *list_name,
707 const char *cells_name,
708 int cell_count, int index,
709 struct fdtdec_phandle_args *out_args)
711 const __be32 *list, *list_end;
712 int rc = 0, size, cur_index = 0;
717 /* Retrieve the phandle list property */
718 list = fdt_getprop(blob, src_node, list_name, &size);
721 list_end = list + size / sizeof(*list);
723 /* Loop over the phandles until all the requested entry is found */
724 while (list < list_end) {
729 * If phandle is 0, then it is an empty entry with no
730 * arguments. Skip forward to the next entry.
732 phandle = be32_to_cpup(list++);
735 * Find the provider node and parse the #*-cells
736 * property to determine the argument length.
738 * This is not needed if the cell count is hard-coded
739 * (i.e. cells_name not set, but cell_count is set),
740 * except when we're going to return the found node
743 if (cells_name || cur_index == index) {
744 node = fdt_node_offset_by_phandle(blob,
747 debug("%s: could not find phandle\n",
748 fdt_get_name(blob, src_node,
755 count = fdtdec_get_int(blob, node, cells_name,
758 debug("%s: could not get %s for %s\n",
759 fdt_get_name(blob, src_node,
762 fdt_get_name(blob, node,
771 * Make sure that the arguments actually fit in the
772 * remaining property data length
774 if (list + count > list_end) {
775 debug("%s: arguments longer than property\n",
776 fdt_get_name(blob, src_node, NULL));
782 * All of the error cases above bail out of the loop, so at
783 * this point, the parsing is successful. If the requested
784 * index matches, then fill the out_args structure and return,
785 * or return -ENOENT for an empty entry.
788 if (cur_index == index) {
795 if (count > MAX_PHANDLE_ARGS) {
796 debug("%s: too many arguments %d\n",
797 fdt_get_name(blob, src_node,
799 count = MAX_PHANDLE_ARGS;
801 out_args->node = node;
802 out_args->args_count = count;
803 for (i = 0; i < count; i++) {
805 be32_to_cpup(list++);
809 /* Found it! return success */
819 * Result will be one of:
820 * -ENOENT : index is for empty phandle
821 * -EINVAL : parsing error on data
822 * [1..n] : Number of phandle (count mode; when index = -1)
824 rc = index < 0 ? cur_index : -ENOENT;
829 int fdtdec_get_child_count(const void *blob, int node)
834 fdt_for_each_subnode(blob, subnode, node)
840 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
841 u8 *array, int count)
846 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
848 memcpy(array, cell, count);
852 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
853 const char *prop_name, int count)
858 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
864 int fdtdec_get_config_int(const void *blob, const char *prop_name,
869 debug("%s: %s\n", __func__, prop_name);
870 config_node = fdt_path_offset(blob, "/config");
873 return fdtdec_get_int(blob, config_node, prop_name, default_val);
876 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
881 debug("%s: %s\n", __func__, prop_name);
882 config_node = fdt_path_offset(blob, "/config");
885 prop = fdt_get_property(blob, config_node, prop_name, NULL);
890 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
896 debug("%s: %s\n", __func__, prop_name);
897 nodeoffset = fdt_path_offset(blob, "/config");
901 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
905 return (char *)nodep;
908 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
909 fdt_addr_t *basep, fdt_size_t *sizep)
911 const fdt_addr_t *cell;
914 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
916 cell = fdt_getprop(blob, node, prop_name, &len);
917 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
918 debug("cell=%p, len=%d\n", cell, len);
922 *basep = fdt_addr_to_cpu(*cell);
923 *sizep = fdt_size_to_cpu(cell[1]);
924 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
931 * Read a flash entry from the fdt
933 * @param blob FDT blob
934 * @param node Offset of node to read
935 * @param name Name of node being read
936 * @param entry Place to put offset and size of this node
937 * @return 0 if ok, -ve on error
939 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
940 struct fmap_entry *entry)
945 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
946 debug("Node '%s' has bad/missing 'reg' property\n", name);
947 return -FDT_ERR_NOTFOUND;
949 entry->offset = reg[0];
950 entry->length = reg[1];
951 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
952 prop = fdt_getprop(blob, node, "compress", NULL);
953 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
954 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
955 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
956 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
957 entry->hash = (uint8_t *)prop;
962 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
967 number = (number << 32) | fdt32_to_cpu(*ptr++);
972 int fdt_get_resource(const void *fdt, int node, const char *property,
973 unsigned int index, struct fdt_resource *res)
975 const fdt32_t *ptr, *end;
976 int na, ns, len, parent;
979 parent = fdt_parent_offset(fdt, node);
983 na = fdt_address_cells(fdt, parent);
984 ns = fdt_size_cells(fdt, parent);
986 ptr = fdt_getprop(fdt, node, property, &len);
990 end = ptr + len / sizeof(*ptr);
992 while (ptr + na + ns <= end) {
994 res->start = res->end = fdtdec_get_number(ptr, na);
995 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
1003 return -FDT_ERR_NOTFOUND;
1006 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1007 const char *prop_names, const char *name,
1008 struct fdt_resource *res)
1012 index = fdt_find_string(fdt, node, prop_names, name);
1016 return fdt_get_resource(fdt, node, property, index, res);
1019 int fdtdec_decode_memory_region(const void *blob, int config_node,
1020 const char *mem_type, const char *suffix,
1021 fdt_addr_t *basep, fdt_size_t *sizep)
1025 fdt_size_t size, offset_size;
1026 fdt_addr_t base, offset;
1029 if (config_node == -1) {
1030 config_node = fdt_path_offset(blob, "/config");
1031 if (config_node < 0) {
1032 debug("%s: Cannot find /config node\n", __func__);
1039 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1041 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1043 debug("%s: No memory type for '%s', using /memory\n", __func__,
1048 node = fdt_path_offset(blob, mem);
1050 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1051 fdt_strerror(node));
1056 * Not strictly correct - the memory may have multiple banks. We just
1059 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1060 debug("%s: Failed to decode memory region %s\n", __func__,
1065 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1067 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1069 debug("%s: Failed to decode memory region '%s'\n", __func__,
1074 *basep = base + offset;
1075 *sizep = offset_size;
1080 static int decode_timing_property(const void *blob, int node, const char *name,
1081 struct timing_entry *result)
1083 int length, ret = 0;
1086 prop = fdt_getprop(blob, node, name, &length);
1088 debug("%s: could not find property %s\n",
1089 fdt_get_name(blob, node, NULL), name);
1093 if (length == sizeof(u32)) {
1094 result->typ = fdtdec_get_int(blob, node, name, 0);
1095 result->min = result->typ;
1096 result->max = result->typ;
1098 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1104 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1105 struct display_timing *dt)
1107 int i, node, timings_node;
1111 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1112 if (timings_node < 0)
1113 return timings_node;
1115 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1116 node > 0 && i != index;
1117 node = fdt_next_subnode(blob, node))
1123 memset(dt, 0, sizeof(*dt));
1125 ret |= decode_timing_property(blob, node, "hback-porch",
1127 ret |= decode_timing_property(blob, node, "hfront-porch",
1129 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1130 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1131 ret |= decode_timing_property(blob, node, "vback-porch",
1133 ret |= decode_timing_property(blob, node, "vfront-porch",
1135 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1136 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1137 ret |= decode_timing_property(blob, node, "clock-frequency",
1141 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1143 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1144 DISPLAY_FLAGS_VSYNC_LOW;
1146 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1148 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1149 DISPLAY_FLAGS_HSYNC_LOW;
1151 val = fdtdec_get_int(blob, node, "de-active", -1);
1153 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1154 DISPLAY_FLAGS_DE_LOW;
1156 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1158 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1159 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1162 if (fdtdec_get_bool(blob, node, "interlaced"))
1163 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1164 if (fdtdec_get_bool(blob, node, "doublescan"))
1165 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1166 if (fdtdec_get_bool(blob, node, "doubleclk"))
1167 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1172 int fdtdec_setup(void)
1174 #if CONFIG_IS_ENABLED(OF_CONTROL)
1175 # ifdef CONFIG_OF_EMBED
1176 /* Get a pointer to the FDT */
1177 gd->fdt_blob = __dtb_dt_begin;
1178 # elif defined CONFIG_OF_SEPARATE
1179 # ifdef CONFIG_SPL_BUILD
1180 /* FDT is at end of BSS unless it is in a different memory region */
1181 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1182 gd->fdt_blob = (ulong *)&_image_binary_end;
1184 gd->fdt_blob = (ulong *)&__bss_end;
1186 /* FDT is at end of image */
1187 gd->fdt_blob = (ulong *)&_end;
1189 # elif defined(CONFIG_OF_HOSTFILE)
1190 if (sandbox_read_fdt_from_file()) {
1191 puts("Failed to read control FDT\n");
1195 # ifndef CONFIG_SPL_BUILD
1196 /* Allow the early environment to override the fdt address */
1197 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1198 (uintptr_t)gd->fdt_blob);
1201 return fdtdec_prepare_fdt();
1204 #endif /* !USE_HOSTCC */