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_TEGRA20_PWM, "nvidia,tegra20-pwm"),
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_TEGRA186_SDMMC, "nvidia,tegra186-sdhci"),
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_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
39 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
40 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
41 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
42 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
43 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
44 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
45 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
46 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
47 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
48 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
49 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
50 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
51 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
52 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
53 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
54 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
55 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
56 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
57 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
58 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
59 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
60 COMPAT(INTEL_MICROCODE, "intel,microcode"),
61 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
62 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
63 COMPAT(INTEL_GMA, "intel,gma"),
64 COMPAT(AMS_AS3722, "ams,as3722"),
65 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
66 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
67 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
68 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
69 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
70 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
71 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
72 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
73 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
74 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
77 const char *fdtdec_get_compatible(enum fdt_compat_id id)
79 /* We allow reading of the 'unknown' ID for testing purposes */
80 assert(id >= 0 && id < COMPAT_COUNT);
81 return compat_names[id];
84 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
85 const char *prop_name, int index, int na, int ns,
88 const fdt32_t *prop, *prop_end;
89 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
93 debug("%s: %s: ", __func__, prop_name);
95 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
96 debug("(na too large for fdt_addr_t type)\n");
97 return FDT_ADDR_T_NONE;
100 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
101 debug("(ns too large for fdt_size_t type)\n");
102 return FDT_ADDR_T_NONE;
105 prop = fdt_getprop(blob, node, prop_name, &len);
107 debug("(not found)\n");
108 return FDT_ADDR_T_NONE;
110 prop_end = prop + (len / sizeof(*prop));
112 prop_addr = prop + (index * (na + ns));
113 prop_size = prop_addr + na;
114 prop_after_size = prop_size + ns;
115 if (prop_after_size > prop_end) {
116 debug("(not enough data: expected >= %d cells, got %d cells)\n",
117 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
118 return FDT_ADDR_T_NONE;
121 addr = fdtdec_get_number(prop_addr, na);
124 *sizep = fdtdec_get_number(prop_size, ns);
125 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
126 (unsigned long long)*sizep);
128 debug("addr=%08llx\n", (unsigned long long)addr);
134 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
135 int node, const char *prop_name, int index, fdt_size_t *sizep)
139 debug("%s: ", __func__);
141 na = fdt_address_cells(blob, parent);
143 debug("(bad #address-cells)\n");
144 return FDT_ADDR_T_NONE;
147 ns = fdt_size_cells(blob, parent);
149 debug("(bad #size-cells)\n");
150 return FDT_ADDR_T_NONE;
153 debug("na=%d, ns=%d, ", na, ns);
155 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
159 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
160 const char *prop_name, int index, fdt_size_t *sizep)
164 debug("%s: ", __func__);
166 parent = fdt_parent_offset(blob, node);
168 debug("(no parent found)\n");
169 return FDT_ADDR_T_NONE;
172 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
176 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
177 const char *prop_name, fdt_size_t *sizep)
179 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
181 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
182 sizeof(fdt_addr_t) / sizeof(fdt32_t),
186 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
187 const char *prop_name)
189 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
192 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
193 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
194 const char *prop_name, struct fdt_pci_addr *addr)
200 debug("%s: %s: ", __func__, prop_name);
203 * If we follow the pci bus bindings strictly, we should check
204 * the value of the node's parent node's #address-cells and
205 * #size-cells. They need to be 3 and 2 accordingly. However,
206 * for simplicity we skip the check here.
208 cell = fdt_getprop(blob, node, prop_name, &len);
212 if ((len % FDT_PCI_REG_SIZE) == 0) {
213 int num = len / FDT_PCI_REG_SIZE;
216 for (i = 0; i < num; i++) {
217 debug("pci address #%d: %08lx %08lx %08lx\n", i,
218 (ulong)fdt32_to_cpu(cell[0]),
219 (ulong)fdt32_to_cpu(cell[1]),
220 (ulong)fdt32_to_cpu(cell[2]));
221 if ((fdt32_to_cpu(*cell) & type) == type) {
222 addr->phys_hi = fdt32_to_cpu(cell[0]);
223 addr->phys_mid = fdt32_to_cpu(cell[1]);
224 addr->phys_lo = fdt32_to_cpu(cell[1]);
227 cell += (FDT_PCI_ADDR_CELLS +
243 debug("(not found)\n");
247 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
249 const char *list, *end;
252 list = fdt_getprop(blob, node, "compatible", &len);
261 if (len >= strlen("pciVVVV,DDDD")) {
262 s = strstr(list, "pci");
265 * check if the string is something like pciVVVV,DDDD.RR
266 * or just pciVVVV,DDDD
268 if (s && s[7] == ',' &&
269 (s[12] == '.' || s[12] == 0)) {
271 *vendor = simple_strtol(s, NULL, 16);
274 *device = simple_strtol(s, NULL, 16);
285 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
290 /* extract the bar number from fdt_pci_addr */
291 barnum = addr->phys_hi & 0xff;
292 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
295 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
296 *bar = dm_pci_read_bar32(dev, barnum);
302 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
303 uint64_t default_val)
305 const uint64_t *cell64;
308 cell64 = fdt_getprop(blob, node, prop_name, &length);
309 if (!cell64 || length < sizeof(*cell64))
312 return fdt64_to_cpu(*cell64);
315 int fdtdec_get_is_enabled(const void *blob, int node)
320 * It should say "okay", so only allow that. Some fdts use "ok" but
321 * this is a bug. Please fix your device tree source file. See here
324 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
326 cell = fdt_getprop(blob, node, "status", NULL);
328 return 0 == strcmp(cell, "okay");
332 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
334 enum fdt_compat_id id;
336 /* Search our drivers */
337 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
338 if (0 == fdt_node_check_compatible(blob, node,
341 return COMPAT_UNKNOWN;
344 int fdtdec_next_compatible(const void *blob, int node,
345 enum fdt_compat_id id)
347 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
350 int fdtdec_next_compatible_subnode(const void *blob, int node,
351 enum fdt_compat_id id, int *depthp)
354 node = fdt_next_node(blob, node, depthp);
355 } while (*depthp > 1);
357 /* If this is a direct subnode, and compatible, return it */
358 if (*depthp == 1 && 0 == fdt_node_check_compatible(
359 blob, node, compat_names[id]))
362 return -FDT_ERR_NOTFOUND;
365 int fdtdec_next_alias(const void *blob, const char *name,
366 enum fdt_compat_id id, int *upto)
368 #define MAX_STR_LEN 20
369 char str[MAX_STR_LEN + 20];
372 /* snprintf() is not available */
373 assert(strlen(name) < MAX_STR_LEN);
374 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
375 node = fdt_path_offset(blob, str);
378 err = fdt_node_check_compatible(blob, node, compat_names[id]);
382 return -FDT_ERR_NOTFOUND;
387 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
388 enum fdt_compat_id id, int *node_list, int maxcount)
390 memset(node_list, '\0', sizeof(*node_list) * maxcount);
392 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
395 /* TODO: Can we tighten this code up a little? */
396 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
397 enum fdt_compat_id id, int *node_list, int maxcount)
399 int name_len = strlen(name);
407 /* find the alias node if present */
408 alias_node = fdt_path_offset(blob, "/aliases");
411 * start with nothing, and we can assume that the root node can't
414 memset(nodes, '\0', sizeof(nodes));
416 /* First find all the compatible nodes */
417 for (node = count = 0; node >= 0 && count < maxcount;) {
418 node = fdtdec_next_compatible(blob, node, id);
420 nodes[count++] = node;
423 debug("%s: warning: maxcount exceeded with alias '%s'\n",
426 /* Now find all the aliases */
427 for (offset = fdt_first_property_offset(blob, alias_node);
429 offset = fdt_next_property_offset(blob, offset)) {
430 const struct fdt_property *prop;
436 prop = fdt_get_property_by_offset(blob, offset, NULL);
437 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
438 if (prop->len && 0 == strncmp(path, name, name_len))
439 node = fdt_path_offset(blob, prop->data);
443 /* Get the alias number */
444 number = simple_strtoul(path + name_len, NULL, 10);
445 if (number < 0 || number >= maxcount) {
446 debug("%s: warning: alias '%s' is out of range\n",
451 /* Make sure the node we found is actually in our list! */
453 for (j = 0; j < count; j++)
454 if (nodes[j] == node) {
460 debug("%s: warning: alias '%s' points to a node "
461 "'%s' that is missing or is not compatible "
462 " with '%s'\n", __func__, path,
463 fdt_get_name(blob, node, NULL),
469 * Add this node to our list in the right place, and mark
472 if (fdtdec_get_is_enabled(blob, node)) {
473 if (node_list[number]) {
474 debug("%s: warning: alias '%s' requires that "
475 "a node be placed in the list in a "
476 "position which is already filled by "
477 "node '%s'\n", __func__, path,
478 fdt_get_name(blob, node, NULL));
481 node_list[number] = node;
482 if (number >= num_found)
483 num_found = number + 1;
488 /* Add any nodes not mentioned by an alias */
489 for (i = j = 0; i < maxcount; i++) {
491 for (; j < maxcount; j++)
493 fdtdec_get_is_enabled(blob, nodes[j]))
496 /* Have we run out of nodes to add? */
500 assert(!node_list[i]);
501 node_list[i] = nodes[j++];
510 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
513 int base_len = strlen(base);
514 const char *find_name;
519 find_name = fdt_get_name(blob, offset, &find_namelen);
520 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
522 aliases = fdt_path_offset(blob, "/aliases");
523 for (prop_offset = fdt_first_property_offset(blob, aliases);
525 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
531 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
532 debug(" - %s, %s\n", name, prop);
533 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
534 strncmp(name, base, base_len))
537 slash = strrchr(prop, '/');
538 if (strcmp(slash + 1, find_name))
540 val = trailing_strtol(name);
543 debug("Found seq %d\n", *seqp);
548 debug("Not found\n");
552 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
558 chosen_node = fdt_path_offset(blob, "/chosen");
559 return fdt_getprop(blob, chosen_node, name, NULL);
562 int fdtdec_get_chosen_node(const void *blob, const char *name)
566 prop = fdtdec_get_chosen_prop(blob, name);
568 return -FDT_ERR_NOTFOUND;
569 return fdt_path_offset(blob, prop);
572 int fdtdec_check_fdt(void)
575 * We must have an FDT, but we cannot panic() yet since the console
576 * is not ready. So for now, just assert(). Boards which need an early
577 * FDT (prior to console ready) will need to make their own
578 * arrangements and do their own checks.
580 assert(!fdtdec_prepare_fdt());
585 * This function is a little odd in that it accesses global data. At some
586 * point if the architecture board.c files merge this will make more sense.
587 * Even now, it is common code.
589 int fdtdec_prepare_fdt(void)
591 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
592 fdt_check_header(gd->fdt_blob)) {
593 #ifdef CONFIG_SPL_BUILD
594 puts("Missing DTB\n");
596 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");
599 printf("fdt_blob=%p\n", gd->fdt_blob);
600 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
610 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
615 debug("%s: %s\n", __func__, prop_name);
616 phandle = fdt_getprop(blob, node, prop_name, NULL);
618 return -FDT_ERR_NOTFOUND;
620 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
625 * Look up a property in a node and check that it has a minimum length.
627 * @param blob FDT blob
628 * @param node node to examine
629 * @param prop_name name of property to find
630 * @param min_len minimum property length in bytes
631 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
632 found, or -FDT_ERR_BADLAYOUT if not enough data
633 * @return pointer to cell, which is only valid if err == 0
635 static const void *get_prop_check_min_len(const void *blob, int node,
636 const char *prop_name, int min_len, int *err)
641 debug("%s: %s\n", __func__, prop_name);
642 cell = fdt_getprop(blob, node, prop_name, &len);
644 *err = -FDT_ERR_NOTFOUND;
645 else if (len < min_len)
646 *err = -FDT_ERR_BADLAYOUT;
652 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
653 u32 *array, int count)
658 debug("%s: %s\n", __func__, prop_name);
659 cell = get_prop_check_min_len(blob, node, prop_name,
660 sizeof(u32) * count, &err);
662 for (i = 0; i < count; i++)
663 array[i] = fdt32_to_cpu(cell[i]);
668 int fdtdec_get_int_array_count(const void *blob, int node,
669 const char *prop_name, u32 *array, int count)
675 debug("%s: %s\n", __func__, prop_name);
676 cell = fdt_getprop(blob, node, prop_name, &len);
678 return -FDT_ERR_NOTFOUND;
679 elems = len / sizeof(u32);
682 for (i = 0; i < count; i++)
683 array[i] = fdt32_to_cpu(cell[i]);
688 const u32 *fdtdec_locate_array(const void *blob, int node,
689 const char *prop_name, int count)
694 cell = get_prop_check_min_len(blob, node, prop_name,
695 sizeof(u32) * count, &err);
696 return err ? NULL : cell;
699 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
704 debug("%s: %s\n", __func__, prop_name);
705 cell = fdt_getprop(blob, node, prop_name, &len);
709 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
710 const char *list_name,
711 const char *cells_name,
712 int cell_count, int index,
713 struct fdtdec_phandle_args *out_args)
715 const __be32 *list, *list_end;
716 int rc = 0, size, cur_index = 0;
721 /* Retrieve the phandle list property */
722 list = fdt_getprop(blob, src_node, list_name, &size);
725 list_end = list + size / sizeof(*list);
727 /* Loop over the phandles until all the requested entry is found */
728 while (list < list_end) {
733 * If phandle is 0, then it is an empty entry with no
734 * arguments. Skip forward to the next entry.
736 phandle = be32_to_cpup(list++);
739 * Find the provider node and parse the #*-cells
740 * property to determine the argument length.
742 * This is not needed if the cell count is hard-coded
743 * (i.e. cells_name not set, but cell_count is set),
744 * except when we're going to return the found node
747 if (cells_name || cur_index == index) {
748 node = fdt_node_offset_by_phandle(blob,
751 debug("%s: could not find phandle\n",
752 fdt_get_name(blob, src_node,
759 count = fdtdec_get_int(blob, node, cells_name,
762 debug("%s: could not get %s for %s\n",
763 fdt_get_name(blob, src_node,
766 fdt_get_name(blob, node,
775 * Make sure that the arguments actually fit in the
776 * remaining property data length
778 if (list + count > list_end) {
779 debug("%s: arguments longer than property\n",
780 fdt_get_name(blob, src_node, NULL));
786 * All of the error cases above bail out of the loop, so at
787 * this point, the parsing is successful. If the requested
788 * index matches, then fill the out_args structure and return,
789 * or return -ENOENT for an empty entry.
792 if (cur_index == index) {
799 if (count > MAX_PHANDLE_ARGS) {
800 debug("%s: too many arguments %d\n",
801 fdt_get_name(blob, src_node,
803 count = MAX_PHANDLE_ARGS;
805 out_args->node = node;
806 out_args->args_count = count;
807 for (i = 0; i < count; i++) {
809 be32_to_cpup(list++);
813 /* Found it! return success */
823 * Result will be one of:
824 * -ENOENT : index is for empty phandle
825 * -EINVAL : parsing error on data
826 * [1..n] : Number of phandle (count mode; when index = -1)
828 rc = index < 0 ? cur_index : -ENOENT;
833 int fdtdec_get_child_count(const void *blob, int node)
838 fdt_for_each_subnode(blob, subnode, node)
844 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
845 u8 *array, int count)
850 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
852 memcpy(array, cell, count);
856 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
857 const char *prop_name, int count)
862 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
868 int fdtdec_get_config_int(const void *blob, const char *prop_name,
873 debug("%s: %s\n", __func__, prop_name);
874 config_node = fdt_path_offset(blob, "/config");
877 return fdtdec_get_int(blob, config_node, prop_name, default_val);
880 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
885 debug("%s: %s\n", __func__, prop_name);
886 config_node = fdt_path_offset(blob, "/config");
889 prop = fdt_get_property(blob, config_node, prop_name, NULL);
894 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
900 debug("%s: %s\n", __func__, prop_name);
901 nodeoffset = fdt_path_offset(blob, "/config");
905 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
909 return (char *)nodep;
912 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
913 fdt_addr_t *basep, fdt_size_t *sizep)
915 const fdt_addr_t *cell;
918 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
920 cell = fdt_getprop(blob, node, prop_name, &len);
921 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
922 debug("cell=%p, len=%d\n", cell, len);
926 *basep = fdt_addr_to_cpu(*cell);
927 *sizep = fdt_size_to_cpu(cell[1]);
928 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
935 * Read a flash entry from the fdt
937 * @param blob FDT blob
938 * @param node Offset of node to read
939 * @param name Name of node being read
940 * @param entry Place to put offset and size of this node
941 * @return 0 if ok, -ve on error
943 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
944 struct fmap_entry *entry)
949 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
950 debug("Node '%s' has bad/missing 'reg' property\n", name);
951 return -FDT_ERR_NOTFOUND;
953 entry->offset = reg[0];
954 entry->length = reg[1];
955 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
956 prop = fdt_getprop(blob, node, "compress", NULL);
957 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
958 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
959 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
960 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
961 entry->hash = (uint8_t *)prop;
966 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
971 number = (number << 32) | fdt32_to_cpu(*ptr++);
976 int fdt_get_resource(const void *fdt, int node, const char *property,
977 unsigned int index, struct fdt_resource *res)
979 const fdt32_t *ptr, *end;
980 int na, ns, len, parent;
983 parent = fdt_parent_offset(fdt, node);
987 na = fdt_address_cells(fdt, parent);
988 ns = fdt_size_cells(fdt, parent);
990 ptr = fdt_getprop(fdt, node, property, &len);
994 end = ptr + len / sizeof(*ptr);
996 while (ptr + na + ns <= end) {
998 res->start = res->end = fdtdec_get_number(ptr, na);
999 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
1007 return -FDT_ERR_NOTFOUND;
1010 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1011 const char *prop_names, const char *name,
1012 struct fdt_resource *res)
1016 index = fdt_find_string(fdt, node, prop_names, name);
1020 return fdt_get_resource(fdt, node, property, index, res);
1023 int fdtdec_decode_memory_region(const void *blob, int config_node,
1024 const char *mem_type, const char *suffix,
1025 fdt_addr_t *basep, fdt_size_t *sizep)
1029 fdt_size_t size, offset_size;
1030 fdt_addr_t base, offset;
1033 if (config_node == -1) {
1034 config_node = fdt_path_offset(blob, "/config");
1035 if (config_node < 0) {
1036 debug("%s: Cannot find /config node\n", __func__);
1043 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1045 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1047 debug("%s: No memory type for '%s', using /memory\n", __func__,
1052 node = fdt_path_offset(blob, mem);
1054 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1055 fdt_strerror(node));
1060 * Not strictly correct - the memory may have multiple banks. We just
1063 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1064 debug("%s: Failed to decode memory region %s\n", __func__,
1069 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1071 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1073 debug("%s: Failed to decode memory region '%s'\n", __func__,
1078 *basep = base + offset;
1079 *sizep = offset_size;
1084 static int decode_timing_property(const void *blob, int node, const char *name,
1085 struct timing_entry *result)
1087 int length, ret = 0;
1090 prop = fdt_getprop(blob, node, name, &length);
1092 debug("%s: could not find property %s\n",
1093 fdt_get_name(blob, node, NULL), name);
1097 if (length == sizeof(u32)) {
1098 result->typ = fdtdec_get_int(blob, node, name, 0);
1099 result->min = result->typ;
1100 result->max = result->typ;
1102 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1108 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1109 struct display_timing *dt)
1111 int i, node, timings_node;
1115 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1116 if (timings_node < 0)
1117 return timings_node;
1119 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1120 node > 0 && i != index;
1121 node = fdt_next_subnode(blob, node))
1127 memset(dt, 0, sizeof(*dt));
1129 ret |= decode_timing_property(blob, node, "hback-porch",
1131 ret |= decode_timing_property(blob, node, "hfront-porch",
1133 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1134 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1135 ret |= decode_timing_property(blob, node, "vback-porch",
1137 ret |= decode_timing_property(blob, node, "vfront-porch",
1139 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1140 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1141 ret |= decode_timing_property(blob, node, "clock-frequency",
1145 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1147 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1148 DISPLAY_FLAGS_VSYNC_LOW;
1150 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1152 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1153 DISPLAY_FLAGS_HSYNC_LOW;
1155 val = fdtdec_get_int(blob, node, "de-active", -1);
1157 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1158 DISPLAY_FLAGS_DE_LOW;
1160 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1162 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1163 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1166 if (fdtdec_get_bool(blob, node, "interlaced"))
1167 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1168 if (fdtdec_get_bool(blob, node, "doublescan"))
1169 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1170 if (fdtdec_get_bool(blob, node, "doubleclk"))
1171 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1176 int fdtdec_setup(void)
1178 #if CONFIG_IS_ENABLED(OF_CONTROL)
1179 # ifdef CONFIG_OF_EMBED
1180 /* Get a pointer to the FDT */
1181 gd->fdt_blob = __dtb_dt_begin;
1182 # elif defined CONFIG_OF_SEPARATE
1183 # ifdef CONFIG_SPL_BUILD
1184 /* FDT is at end of BSS unless it is in a different memory region */
1185 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1186 gd->fdt_blob = (ulong *)&_image_binary_end;
1188 gd->fdt_blob = (ulong *)&__bss_end;
1190 /* FDT is at end of image */
1191 gd->fdt_blob = (ulong *)&_end;
1193 # elif defined(CONFIG_OF_HOSTFILE)
1194 if (sandbox_read_fdt_from_file()) {
1195 puts("Failed to read control FDT\n");
1199 # ifndef CONFIG_SPL_BUILD
1200 /* Allow the early environment to override the fdt address */
1201 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1202 (uintptr_t)gd->fdt_blob);
1205 return fdtdec_prepare_fdt();
1208 #endif /* !USE_HOSTCC */