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 * NOTE: This list is basically a TODO list for things that need to be
24 * converted to driver model. So don't add new things here unless there is a
25 * good reason why driver-model conversion is infeasible. Examples include
26 * things which are used before driver model is available.
28 #define COMPAT(id, name) name
29 static const char * const compat_names[COMPAT_COUNT] = {
30 COMPAT(UNKNOWN, "<none>"),
31 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
32 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
33 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
34 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
35 COMPAT(NVIDIA_TEGRA186_SDMMC, "nvidia,tegra186-sdhci"),
36 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
37 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
38 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
39 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
40 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
41 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
42 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
43 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
44 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
45 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
46 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
47 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
48 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
49 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
50 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
51 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
52 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
53 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
54 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
55 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
56 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
57 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
58 COMPAT(INTEL_MICROCODE, "intel,microcode"),
59 COMPAT(AMS_AS3722, "ams,as3722"),
60 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
61 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
62 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
63 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
64 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
65 COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
66 COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
67 COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
70 const char *fdtdec_get_compatible(enum fdt_compat_id id)
72 /* We allow reading of the 'unknown' ID for testing purposes */
73 assert(id >= 0 && id < COMPAT_COUNT);
74 return compat_names[id];
77 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
78 const char *prop_name, int index, int na, int ns,
81 const fdt32_t *prop, *prop_end;
82 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
86 debug("%s: %s: ", __func__, prop_name);
88 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
89 debug("(na too large for fdt_addr_t type)\n");
90 return FDT_ADDR_T_NONE;
93 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
94 debug("(ns too large for fdt_size_t type)\n");
95 return FDT_ADDR_T_NONE;
98 prop = fdt_getprop(blob, node, prop_name, &len);
100 debug("(not found)\n");
101 return FDT_ADDR_T_NONE;
103 prop_end = prop + (len / sizeof(*prop));
105 prop_addr = prop + (index * (na + ns));
106 prop_size = prop_addr + na;
107 prop_after_size = prop_size + ns;
108 if (prop_after_size > prop_end) {
109 debug("(not enough data: expected >= %d cells, got %d cells)\n",
110 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
111 return FDT_ADDR_T_NONE;
114 addr = fdtdec_get_number(prop_addr, na);
117 *sizep = fdtdec_get_number(prop_size, ns);
118 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
119 (unsigned long long)*sizep);
121 debug("addr=%08llx\n", (unsigned long long)addr);
127 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
128 int node, const char *prop_name, int index, fdt_size_t *sizep)
132 debug("%s: ", __func__);
134 na = fdt_address_cells(blob, parent);
136 debug("(bad #address-cells)\n");
137 return FDT_ADDR_T_NONE;
140 ns = fdt_size_cells(blob, parent);
142 debug("(bad #size-cells)\n");
143 return FDT_ADDR_T_NONE;
146 debug("na=%d, ns=%d, ", na, ns);
148 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
152 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
153 const char *prop_name, int index, fdt_size_t *sizep)
157 debug("%s: ", __func__);
159 parent = fdt_parent_offset(blob, node);
161 debug("(no parent found)\n");
162 return FDT_ADDR_T_NONE;
165 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
169 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
170 const char *prop_name, fdt_size_t *sizep)
172 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
174 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
175 sizeof(fdt_addr_t) / sizeof(fdt32_t),
179 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
180 const char *prop_name)
182 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
185 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
186 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
187 const char *prop_name, struct fdt_pci_addr *addr)
193 debug("%s: %s: ", __func__, prop_name);
196 * If we follow the pci bus bindings strictly, we should check
197 * the value of the node's parent node's #address-cells and
198 * #size-cells. They need to be 3 and 2 accordingly. However,
199 * for simplicity we skip the check here.
201 cell = fdt_getprop(blob, node, prop_name, &len);
205 if ((len % FDT_PCI_REG_SIZE) == 0) {
206 int num = len / FDT_PCI_REG_SIZE;
209 for (i = 0; i < num; i++) {
210 debug("pci address #%d: %08lx %08lx %08lx\n", i,
211 (ulong)fdt32_to_cpu(cell[0]),
212 (ulong)fdt32_to_cpu(cell[1]),
213 (ulong)fdt32_to_cpu(cell[2]));
214 if ((fdt32_to_cpu(*cell) & type) == type) {
215 addr->phys_hi = fdt32_to_cpu(cell[0]);
216 addr->phys_mid = fdt32_to_cpu(cell[1]);
217 addr->phys_lo = fdt32_to_cpu(cell[1]);
220 cell += (FDT_PCI_ADDR_CELLS +
236 debug("(not found)\n");
240 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
242 const char *list, *end;
245 list = fdt_getprop(blob, node, "compatible", &len);
254 if (len >= strlen("pciVVVV,DDDD")) {
255 s = strstr(list, "pci");
258 * check if the string is something like pciVVVV,DDDD.RR
259 * or just pciVVVV,DDDD
261 if (s && s[7] == ',' &&
262 (s[12] == '.' || s[12] == 0)) {
264 *vendor = simple_strtol(s, NULL, 16);
267 *device = simple_strtol(s, NULL, 16);
278 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
283 /* extract the bar number from fdt_pci_addr */
284 barnum = addr->phys_hi & 0xff;
285 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
288 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
289 *bar = dm_pci_read_bar32(dev, barnum);
295 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
296 uint64_t default_val)
298 const uint64_t *cell64;
301 cell64 = fdt_getprop(blob, node, prop_name, &length);
302 if (!cell64 || length < sizeof(*cell64))
305 return fdt64_to_cpu(*cell64);
308 int fdtdec_get_is_enabled(const void *blob, int node)
313 * It should say "okay", so only allow that. Some fdts use "ok" but
314 * this is a bug. Please fix your device tree source file. See here
317 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
319 cell = fdt_getprop(blob, node, "status", NULL);
321 return 0 == strcmp(cell, "okay");
325 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
327 enum fdt_compat_id id;
329 /* Search our drivers */
330 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
331 if (0 == fdt_node_check_compatible(blob, node,
334 return COMPAT_UNKNOWN;
337 int fdtdec_next_compatible(const void *blob, int node,
338 enum fdt_compat_id id)
340 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
343 int fdtdec_next_compatible_subnode(const void *blob, int node,
344 enum fdt_compat_id id, int *depthp)
347 node = fdt_next_node(blob, node, depthp);
348 } while (*depthp > 1);
350 /* If this is a direct subnode, and compatible, return it */
351 if (*depthp == 1 && 0 == fdt_node_check_compatible(
352 blob, node, compat_names[id]))
355 return -FDT_ERR_NOTFOUND;
358 int fdtdec_next_alias(const void *blob, const char *name,
359 enum fdt_compat_id id, int *upto)
361 #define MAX_STR_LEN 20
362 char str[MAX_STR_LEN + 20];
365 /* snprintf() is not available */
366 assert(strlen(name) < MAX_STR_LEN);
367 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
368 node = fdt_path_offset(blob, str);
371 err = fdt_node_check_compatible(blob, node, compat_names[id]);
375 return -FDT_ERR_NOTFOUND;
380 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
381 enum fdt_compat_id id, int *node_list, int maxcount)
383 memset(node_list, '\0', sizeof(*node_list) * maxcount);
385 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
388 /* TODO: Can we tighten this code up a little? */
389 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
390 enum fdt_compat_id id, int *node_list, int maxcount)
392 int name_len = strlen(name);
400 /* find the alias node if present */
401 alias_node = fdt_path_offset(blob, "/aliases");
404 * start with nothing, and we can assume that the root node can't
407 memset(nodes, '\0', sizeof(nodes));
409 /* First find all the compatible nodes */
410 for (node = count = 0; node >= 0 && count < maxcount;) {
411 node = fdtdec_next_compatible(blob, node, id);
413 nodes[count++] = node;
416 debug("%s: warning: maxcount exceeded with alias '%s'\n",
419 /* Now find all the aliases */
420 for (offset = fdt_first_property_offset(blob, alias_node);
422 offset = fdt_next_property_offset(blob, offset)) {
423 const struct fdt_property *prop;
429 prop = fdt_get_property_by_offset(blob, offset, NULL);
430 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
431 if (prop->len && 0 == strncmp(path, name, name_len))
432 node = fdt_path_offset(blob, prop->data);
436 /* Get the alias number */
437 number = simple_strtoul(path + name_len, NULL, 10);
438 if (number < 0 || number >= maxcount) {
439 debug("%s: warning: alias '%s' is out of range\n",
444 /* Make sure the node we found is actually in our list! */
446 for (j = 0; j < count; j++)
447 if (nodes[j] == node) {
453 debug("%s: warning: alias '%s' points to a node "
454 "'%s' that is missing or is not compatible "
455 " with '%s'\n", __func__, path,
456 fdt_get_name(blob, node, NULL),
462 * Add this node to our list in the right place, and mark
465 if (fdtdec_get_is_enabled(blob, node)) {
466 if (node_list[number]) {
467 debug("%s: warning: alias '%s' requires that "
468 "a node be placed in the list in a "
469 "position which is already filled by "
470 "node '%s'\n", __func__, path,
471 fdt_get_name(blob, node, NULL));
474 node_list[number] = node;
475 if (number >= num_found)
476 num_found = number + 1;
481 /* Add any nodes not mentioned by an alias */
482 for (i = j = 0; i < maxcount; i++) {
484 for (; j < maxcount; j++)
486 fdtdec_get_is_enabled(blob, nodes[j]))
489 /* Have we run out of nodes to add? */
493 assert(!node_list[i]);
494 node_list[i] = nodes[j++];
503 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
506 int base_len = strlen(base);
507 const char *find_name;
512 find_name = fdt_get_name(blob, offset, &find_namelen);
513 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
515 aliases = fdt_path_offset(blob, "/aliases");
516 for (prop_offset = fdt_first_property_offset(blob, aliases);
518 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
524 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
525 debug(" - %s, %s\n", name, prop);
526 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
527 strncmp(name, base, base_len))
530 slash = strrchr(prop, '/');
531 if (strcmp(slash + 1, find_name))
533 val = trailing_strtol(name);
536 debug("Found seq %d\n", *seqp);
541 debug("Not found\n");
545 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
551 chosen_node = fdt_path_offset(blob, "/chosen");
552 return fdt_getprop(blob, chosen_node, name, NULL);
555 int fdtdec_get_chosen_node(const void *blob, const char *name)
559 prop = fdtdec_get_chosen_prop(blob, name);
561 return -FDT_ERR_NOTFOUND;
562 return fdt_path_offset(blob, prop);
565 int fdtdec_check_fdt(void)
568 * We must have an FDT, but we cannot panic() yet since the console
569 * is not ready. So for now, just assert(). Boards which need an early
570 * FDT (prior to console ready) will need to make their own
571 * arrangements and do their own checks.
573 assert(!fdtdec_prepare_fdt());
578 * This function is a little odd in that it accesses global data. At some
579 * point if the architecture board.c files merge this will make more sense.
580 * Even now, it is common code.
582 int fdtdec_prepare_fdt(void)
584 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
585 fdt_check_header(gd->fdt_blob)) {
586 #ifdef CONFIG_SPL_BUILD
587 puts("Missing DTB\n");
589 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");
592 printf("fdt_blob=%p\n", gd->fdt_blob);
593 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
603 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
608 debug("%s: %s\n", __func__, prop_name);
609 phandle = fdt_getprop(blob, node, prop_name, NULL);
611 return -FDT_ERR_NOTFOUND;
613 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
618 * Look up a property in a node and check that it has a minimum length.
620 * @param blob FDT blob
621 * @param node node to examine
622 * @param prop_name name of property to find
623 * @param min_len minimum property length in bytes
624 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
625 found, or -FDT_ERR_BADLAYOUT if not enough data
626 * @return pointer to cell, which is only valid if err == 0
628 static const void *get_prop_check_min_len(const void *blob, int node,
629 const char *prop_name, int min_len, int *err)
634 debug("%s: %s\n", __func__, prop_name);
635 cell = fdt_getprop(blob, node, prop_name, &len);
637 *err = -FDT_ERR_NOTFOUND;
638 else if (len < min_len)
639 *err = -FDT_ERR_BADLAYOUT;
645 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
646 u32 *array, int count)
651 debug("%s: %s\n", __func__, prop_name);
652 cell = get_prop_check_min_len(blob, node, prop_name,
653 sizeof(u32) * count, &err);
655 for (i = 0; i < count; i++)
656 array[i] = fdt32_to_cpu(cell[i]);
661 int fdtdec_get_int_array_count(const void *blob, int node,
662 const char *prop_name, u32 *array, int count)
668 debug("%s: %s\n", __func__, prop_name);
669 cell = fdt_getprop(blob, node, prop_name, &len);
671 return -FDT_ERR_NOTFOUND;
672 elems = len / sizeof(u32);
675 for (i = 0; i < count; i++)
676 array[i] = fdt32_to_cpu(cell[i]);
681 const u32 *fdtdec_locate_array(const void *blob, int node,
682 const char *prop_name, int count)
687 cell = get_prop_check_min_len(blob, node, prop_name,
688 sizeof(u32) * count, &err);
689 return err ? NULL : cell;
692 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
697 debug("%s: %s\n", __func__, prop_name);
698 cell = fdt_getprop(blob, node, prop_name, &len);
702 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
703 const char *list_name,
704 const char *cells_name,
705 int cell_count, int index,
706 struct fdtdec_phandle_args *out_args)
708 const __be32 *list, *list_end;
709 int rc = 0, size, cur_index = 0;
714 /* Retrieve the phandle list property */
715 list = fdt_getprop(blob, src_node, list_name, &size);
718 list_end = list + size / sizeof(*list);
720 /* Loop over the phandles until all the requested entry is found */
721 while (list < list_end) {
726 * If phandle is 0, then it is an empty entry with no
727 * arguments. Skip forward to the next entry.
729 phandle = be32_to_cpup(list++);
732 * Find the provider node and parse the #*-cells
733 * property to determine the argument length.
735 * This is not needed if the cell count is hard-coded
736 * (i.e. cells_name not set, but cell_count is set),
737 * except when we're going to return the found node
740 if (cells_name || cur_index == index) {
741 node = fdt_node_offset_by_phandle(blob,
744 debug("%s: could not find phandle\n",
745 fdt_get_name(blob, src_node,
752 count = fdtdec_get_int(blob, node, cells_name,
755 debug("%s: could not get %s for %s\n",
756 fdt_get_name(blob, src_node,
759 fdt_get_name(blob, node,
768 * Make sure that the arguments actually fit in the
769 * remaining property data length
771 if (list + count > list_end) {
772 debug("%s: arguments longer than property\n",
773 fdt_get_name(blob, src_node, NULL));
779 * All of the error cases above bail out of the loop, so at
780 * this point, the parsing is successful. If the requested
781 * index matches, then fill the out_args structure and return,
782 * or return -ENOENT for an empty entry.
785 if (cur_index == index) {
792 if (count > MAX_PHANDLE_ARGS) {
793 debug("%s: too many arguments %d\n",
794 fdt_get_name(blob, src_node,
796 count = MAX_PHANDLE_ARGS;
798 out_args->node = node;
799 out_args->args_count = count;
800 for (i = 0; i < count; i++) {
802 be32_to_cpup(list++);
806 /* Found it! return success */
816 * Result will be one of:
817 * -ENOENT : index is for empty phandle
818 * -EINVAL : parsing error on data
819 * [1..n] : Number of phandle (count mode; when index = -1)
821 rc = index < 0 ? cur_index : -ENOENT;
826 int fdtdec_get_child_count(const void *blob, int node)
831 fdt_for_each_subnode(blob, subnode, node)
837 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
838 u8 *array, int count)
843 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
845 memcpy(array, cell, count);
849 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
850 const char *prop_name, int count)
855 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
861 int fdtdec_get_config_int(const void *blob, const char *prop_name,
866 debug("%s: %s\n", __func__, prop_name);
867 config_node = fdt_path_offset(blob, "/config");
870 return fdtdec_get_int(blob, config_node, prop_name, default_val);
873 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
878 debug("%s: %s\n", __func__, prop_name);
879 config_node = fdt_path_offset(blob, "/config");
882 prop = fdt_get_property(blob, config_node, prop_name, NULL);
887 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
893 debug("%s: %s\n", __func__, prop_name);
894 nodeoffset = fdt_path_offset(blob, "/config");
898 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
902 return (char *)nodep;
905 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
906 fdt_addr_t *basep, fdt_size_t *sizep)
908 const fdt_addr_t *cell;
911 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
913 cell = fdt_getprop(blob, node, prop_name, &len);
914 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
915 debug("cell=%p, len=%d\n", cell, len);
919 *basep = fdt_addr_to_cpu(*cell);
920 *sizep = fdt_size_to_cpu(cell[1]);
921 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
928 * Read a flash entry from the fdt
930 * @param blob FDT blob
931 * @param node Offset of node to read
932 * @param name Name of node being read
933 * @param entry Place to put offset and size of this node
934 * @return 0 if ok, -ve on error
936 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
937 struct fmap_entry *entry)
942 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
943 debug("Node '%s' has bad/missing 'reg' property\n", name);
944 return -FDT_ERR_NOTFOUND;
946 entry->offset = reg[0];
947 entry->length = reg[1];
948 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
949 prop = fdt_getprop(blob, node, "compress", NULL);
950 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
951 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
952 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
953 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
954 entry->hash = (uint8_t *)prop;
959 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
964 number = (number << 32) | fdt32_to_cpu(*ptr++);
969 int fdt_get_resource(const void *fdt, int node, const char *property,
970 unsigned int index, struct fdt_resource *res)
972 const fdt32_t *ptr, *end;
973 int na, ns, len, parent;
976 parent = fdt_parent_offset(fdt, node);
980 na = fdt_address_cells(fdt, parent);
981 ns = fdt_size_cells(fdt, parent);
983 ptr = fdt_getprop(fdt, node, property, &len);
987 end = ptr + len / sizeof(*ptr);
989 while (ptr + na + ns <= end) {
991 res->start = res->end = fdtdec_get_number(ptr, na);
992 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
1000 return -FDT_ERR_NOTFOUND;
1003 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1004 const char *prop_names, const char *name,
1005 struct fdt_resource *res)
1009 index = fdt_find_string(fdt, node, prop_names, name);
1013 return fdt_get_resource(fdt, node, property, index, res);
1016 int fdtdec_decode_memory_region(const void *blob, int config_node,
1017 const char *mem_type, const char *suffix,
1018 fdt_addr_t *basep, fdt_size_t *sizep)
1022 fdt_size_t size, offset_size;
1023 fdt_addr_t base, offset;
1026 if (config_node == -1) {
1027 config_node = fdt_path_offset(blob, "/config");
1028 if (config_node < 0) {
1029 debug("%s: Cannot find /config node\n", __func__);
1036 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1038 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1040 debug("%s: No memory type for '%s', using /memory\n", __func__,
1045 node = fdt_path_offset(blob, mem);
1047 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1048 fdt_strerror(node));
1053 * Not strictly correct - the memory may have multiple banks. We just
1056 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1057 debug("%s: Failed to decode memory region %s\n", __func__,
1062 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1064 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1066 debug("%s: Failed to decode memory region '%s'\n", __func__,
1071 *basep = base + offset;
1072 *sizep = offset_size;
1077 static int decode_timing_property(const void *blob, int node, const char *name,
1078 struct timing_entry *result)
1080 int length, ret = 0;
1083 prop = fdt_getprop(blob, node, name, &length);
1085 debug("%s: could not find property %s\n",
1086 fdt_get_name(blob, node, NULL), name);
1090 if (length == sizeof(u32)) {
1091 result->typ = fdtdec_get_int(blob, node, name, 0);
1092 result->min = result->typ;
1093 result->max = result->typ;
1095 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1101 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1102 struct display_timing *dt)
1104 int i, node, timings_node;
1108 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1109 if (timings_node < 0)
1110 return timings_node;
1112 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1113 node > 0 && i != index;
1114 node = fdt_next_subnode(blob, node))
1120 memset(dt, 0, sizeof(*dt));
1122 ret |= decode_timing_property(blob, node, "hback-porch",
1124 ret |= decode_timing_property(blob, node, "hfront-porch",
1126 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1127 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1128 ret |= decode_timing_property(blob, node, "vback-porch",
1130 ret |= decode_timing_property(blob, node, "vfront-porch",
1132 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1133 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1134 ret |= decode_timing_property(blob, node, "clock-frequency",
1138 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1140 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1141 DISPLAY_FLAGS_VSYNC_LOW;
1143 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1145 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1146 DISPLAY_FLAGS_HSYNC_LOW;
1148 val = fdtdec_get_int(blob, node, "de-active", -1);
1150 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1151 DISPLAY_FLAGS_DE_LOW;
1153 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1155 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1156 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1159 if (fdtdec_get_bool(blob, node, "interlaced"))
1160 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1161 if (fdtdec_get_bool(blob, node, "doublescan"))
1162 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1163 if (fdtdec_get_bool(blob, node, "doubleclk"))
1164 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1169 int fdtdec_setup(void)
1171 #if CONFIG_IS_ENABLED(OF_CONTROL)
1172 # ifdef CONFIG_OF_EMBED
1173 /* Get a pointer to the FDT */
1174 gd->fdt_blob = __dtb_dt_begin;
1175 # elif defined CONFIG_OF_SEPARATE
1176 # ifdef CONFIG_SPL_BUILD
1177 /* FDT is at end of BSS unless it is in a different memory region */
1178 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1179 gd->fdt_blob = (ulong *)&_image_binary_end;
1181 gd->fdt_blob = (ulong *)&__bss_end;
1183 /* FDT is at end of image */
1184 gd->fdt_blob = (ulong *)&_end;
1186 # elif defined(CONFIG_OF_HOSTFILE)
1187 if (sandbox_read_fdt_from_file()) {
1188 puts("Failed to read control FDT\n");
1192 # ifndef CONFIG_SPL_BUILD
1193 /* Allow the early environment to override the fdt address */
1194 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1195 (uintptr_t)gd->fdt_blob);
1198 return fdtdec_prepare_fdt();
1201 #endif /* !USE_HOSTCC */