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_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_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(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
60 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
61 COMPAT(INTEL_MICROCODE, "intel,microcode"),
62 COMPAT(MEMORY_SPD, "memory-spd"),
63 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
64 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
65 COMPAT(INTEL_GMA, "intel,gma"),
66 COMPAT(AMS_AS3722, "ams,as3722"),
67 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
68 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
69 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"),
70 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
71 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
72 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
73 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
74 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
75 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
76 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
77 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
80 const char *fdtdec_get_compatible(enum fdt_compat_id id)
82 /* We allow reading of the 'unknown' ID for testing purposes */
83 assert(id >= 0 && id < COMPAT_COUNT);
84 return compat_names[id];
87 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
88 const char *prop_name, int index, int na, int ns,
91 const fdt32_t *prop, *prop_end;
92 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
96 debug("%s: %s: ", __func__, prop_name);
98 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
99 debug("(na too large for fdt_addr_t type)\n");
100 return FDT_ADDR_T_NONE;
103 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
104 debug("(ns too large for fdt_size_t type)\n");
105 return FDT_ADDR_T_NONE;
108 prop = fdt_getprop(blob, node, prop_name, &len);
110 debug("(not found)\n");
111 return FDT_ADDR_T_NONE;
113 prop_end = prop + (len / sizeof(*prop));
115 prop_addr = prop + (index * (na + ns));
116 prop_size = prop_addr + na;
117 prop_after_size = prop_size + ns;
118 if (prop_after_size > prop_end) {
119 debug("(not enough data: expected >= %d cells, got %d cells)\n",
120 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
121 return FDT_ADDR_T_NONE;
124 addr = fdtdec_get_number(prop_addr, na);
127 *sizep = fdtdec_get_number(prop_size, ns);
128 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep);
130 debug("addr=%08llx\n", (u64)addr);
136 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
137 int node, const char *prop_name, int index, fdt_size_t *sizep)
141 debug("%s: ", __func__);
143 na = fdt_address_cells(blob, parent);
145 debug("(bad #address-cells)\n");
146 return FDT_ADDR_T_NONE;
149 ns = fdt_size_cells(blob, parent);
151 debug("(bad #size-cells)\n");
152 return FDT_ADDR_T_NONE;
155 debug("na=%d, ns=%d, ", na, ns);
157 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
161 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
162 const char *prop_name, int index, fdt_size_t *sizep)
166 debug("%s: ", __func__);
168 parent = fdt_parent_offset(blob, node);
170 debug("(no parent found)\n");
171 return FDT_ADDR_T_NONE;
174 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
178 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
179 const char *prop_name, fdt_size_t *sizep)
181 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
183 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
184 sizeof(fdt_addr_t) / sizeof(fdt32_t),
188 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
189 const char *prop_name)
191 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
194 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
195 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
196 const char *prop_name, struct fdt_pci_addr *addr)
202 debug("%s: %s: ", __func__, prop_name);
205 * If we follow the pci bus bindings strictly, we should check
206 * the value of the node's parent node's #address-cells and
207 * #size-cells. They need to be 3 and 2 accordingly. However,
208 * for simplicity we skip the check here.
210 cell = fdt_getprop(blob, node, prop_name, &len);
214 if ((len % FDT_PCI_REG_SIZE) == 0) {
215 int num = len / FDT_PCI_REG_SIZE;
218 for (i = 0; i < num; i++) {
219 debug("pci address #%d: %08lx %08lx %08lx\n", i,
220 (ulong)fdt32_to_cpu(cell[0]),
221 (ulong)fdt32_to_cpu(cell[1]),
222 (ulong)fdt32_to_cpu(cell[2]));
223 if ((fdt32_to_cpu(*cell) & type) == type) {
224 addr->phys_hi = fdt32_to_cpu(cell[0]);
225 addr->phys_mid = fdt32_to_cpu(cell[1]);
226 addr->phys_lo = fdt32_to_cpu(cell[1]);
229 cell += (FDT_PCI_ADDR_CELLS +
245 debug("(not found)\n");
249 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
251 const char *list, *end;
254 list = fdt_getprop(blob, node, "compatible", &len);
263 if (len >= strlen("pciVVVV,DDDD")) {
264 s = strstr(list, "pci");
267 * check if the string is something like pciVVVV,DDDD.RR
268 * or just pciVVVV,DDDD
270 if (s && s[7] == ',' &&
271 (s[12] == '.' || s[12] == 0)) {
273 *vendor = simple_strtol(s, NULL, 16);
276 *device = simple_strtol(s, NULL, 16);
287 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
292 /* extract the bar number from fdt_pci_addr */
293 barnum = addr->phys_hi & 0xff;
294 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
297 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
298 *bar = dm_pci_read_bar32(dev, barnum);
304 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
305 uint64_t default_val)
307 const uint64_t *cell64;
310 cell64 = fdt_getprop(blob, node, prop_name, &length);
311 if (!cell64 || length < sizeof(*cell64))
314 return fdt64_to_cpu(*cell64);
317 int fdtdec_get_is_enabled(const void *blob, int node)
322 * It should say "okay", so only allow that. Some fdts use "ok" but
323 * this is a bug. Please fix your device tree source file. See here
328 cell = fdt_getprop(blob, node, "status", NULL);
330 return 0 == strcmp(cell, "okay");
334 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
336 enum fdt_compat_id id;
338 /* Search our drivers */
339 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
340 if (0 == fdt_node_check_compatible(blob, node,
343 return COMPAT_UNKNOWN;
346 int fdtdec_next_compatible(const void *blob, int node,
347 enum fdt_compat_id id)
349 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
352 int fdtdec_next_compatible_subnode(const void *blob, int node,
353 enum fdt_compat_id id, int *depthp)
356 node = fdt_next_node(blob, node, depthp);
357 } while (*depthp > 1);
359 /* If this is a direct subnode, and compatible, return it */
360 if (*depthp == 1 && 0 == fdt_node_check_compatible(
361 blob, node, compat_names[id]))
364 return -FDT_ERR_NOTFOUND;
367 int fdtdec_next_alias(const void *blob, const char *name,
368 enum fdt_compat_id id, int *upto)
370 #define MAX_STR_LEN 20
371 char str[MAX_STR_LEN + 20];
374 /* snprintf() is not available */
375 assert(strlen(name) < MAX_STR_LEN);
376 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
377 node = fdt_path_offset(blob, str);
380 err = fdt_node_check_compatible(blob, node, compat_names[id]);
384 return -FDT_ERR_NOTFOUND;
389 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
390 enum fdt_compat_id id, int *node_list, int maxcount)
392 memset(node_list, '\0', sizeof(*node_list) * maxcount);
394 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
397 /* TODO: Can we tighten this code up a little? */
398 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
399 enum fdt_compat_id id, int *node_list, int maxcount)
401 int name_len = strlen(name);
409 /* find the alias node if present */
410 alias_node = fdt_path_offset(blob, "/aliases");
413 * start with nothing, and we can assume that the root node can't
416 memset(nodes, '\0', sizeof(nodes));
418 /* First find all the compatible nodes */
419 for (node = count = 0; node >= 0 && count < maxcount;) {
420 node = fdtdec_next_compatible(blob, node, id);
422 nodes[count++] = node;
425 debug("%s: warning: maxcount exceeded with alias '%s'\n",
428 /* Now find all the aliases */
429 for (offset = fdt_first_property_offset(blob, alias_node);
431 offset = fdt_next_property_offset(blob, offset)) {
432 const struct fdt_property *prop;
438 prop = fdt_get_property_by_offset(blob, offset, NULL);
439 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
440 if (prop->len && 0 == strncmp(path, name, name_len))
441 node = fdt_path_offset(blob, prop->data);
445 /* Get the alias number */
446 number = simple_strtoul(path + name_len, NULL, 10);
447 if (number < 0 || number >= maxcount) {
448 debug("%s: warning: alias '%s' is out of range\n",
453 /* Make sure the node we found is actually in our list! */
455 for (j = 0; j < count; j++)
456 if (nodes[j] == node) {
462 debug("%s: warning: alias '%s' points to a node "
463 "'%s' that is missing or is not compatible "
464 " with '%s'\n", __func__, path,
465 fdt_get_name(blob, node, NULL),
471 * Add this node to our list in the right place, and mark
474 if (fdtdec_get_is_enabled(blob, node)) {
475 if (node_list[number]) {
476 debug("%s: warning: alias '%s' requires that "
477 "a node be placed in the list in a "
478 "position which is already filled by "
479 "node '%s'\n", __func__, path,
480 fdt_get_name(blob, node, NULL));
483 node_list[number] = node;
484 if (number >= num_found)
485 num_found = number + 1;
490 /* Add any nodes not mentioned by an alias */
491 for (i = j = 0; i < maxcount; i++) {
493 for (; j < maxcount; j++)
495 fdtdec_get_is_enabled(blob, nodes[j]))
498 /* Have we run out of nodes to add? */
502 assert(!node_list[i]);
503 node_list[i] = nodes[j++];
512 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
515 int base_len = strlen(base);
516 const char *find_name;
521 find_name = fdt_get_name(blob, offset, &find_namelen);
522 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
524 aliases = fdt_path_offset(blob, "/aliases");
525 for (prop_offset = fdt_first_property_offset(blob, aliases);
527 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
533 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
534 debug(" - %s, %s\n", name, prop);
535 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
536 strncmp(name, base, base_len))
539 slash = strrchr(prop, '/');
540 if (strcmp(slash + 1, find_name))
542 val = trailing_strtol(name);
545 debug("Found seq %d\n", *seqp);
550 debug("Not found\n");
554 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
560 chosen_node = fdt_path_offset(blob, "/chosen");
561 return fdt_getprop(blob, chosen_node, name, NULL);
564 int fdtdec_get_chosen_node(const void *blob, const char *name)
568 prop = fdtdec_get_chosen_prop(blob, name);
570 return -FDT_ERR_NOTFOUND;
571 return fdt_path_offset(blob, prop);
574 int fdtdec_check_fdt(void)
577 * We must have an FDT, but we cannot panic() yet since the console
578 * is not ready. So for now, just assert(). Boards which need an early
579 * FDT (prior to console ready) will need to make their own
580 * arrangements and do their own checks.
582 assert(!fdtdec_prepare_fdt());
587 * This function is a little odd in that it accesses global data. At some
588 * point if the architecture board.c files merge this will make more sense.
589 * Even now, it is common code.
591 int fdtdec_prepare_fdt(void)
593 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
594 fdt_check_header(gd->fdt_blob)) {
595 #ifdef CONFIG_SPL_BUILD
596 puts("Missing DTB\n");
598 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");
601 printf("fdt_blob=%p\n", gd->fdt_blob);
602 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
612 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
617 debug("%s: %s\n", __func__, prop_name);
618 phandle = fdt_getprop(blob, node, prop_name, NULL);
620 return -FDT_ERR_NOTFOUND;
622 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
627 * Look up a property in a node and check that it has a minimum length.
629 * @param blob FDT blob
630 * @param node node to examine
631 * @param prop_name name of property to find
632 * @param min_len minimum property length in bytes
633 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
634 found, or -FDT_ERR_BADLAYOUT if not enough data
635 * @return pointer to cell, which is only valid if err == 0
637 static const void *get_prop_check_min_len(const void *blob, int node,
638 const char *prop_name, int min_len, int *err)
643 debug("%s: %s\n", __func__, prop_name);
644 cell = fdt_getprop(blob, node, prop_name, &len);
646 *err = -FDT_ERR_NOTFOUND;
647 else if (len < min_len)
648 *err = -FDT_ERR_BADLAYOUT;
654 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
655 u32 *array, int count)
660 debug("%s: %s\n", __func__, prop_name);
661 cell = get_prop_check_min_len(blob, node, prop_name,
662 sizeof(u32) * count, &err);
664 for (i = 0; i < count; i++)
665 array[i] = fdt32_to_cpu(cell[i]);
670 int fdtdec_get_int_array_count(const void *blob, int node,
671 const char *prop_name, u32 *array, int count)
677 debug("%s: %s\n", __func__, prop_name);
678 cell = fdt_getprop(blob, node, prop_name, &len);
680 return -FDT_ERR_NOTFOUND;
681 elems = len / sizeof(u32);
684 for (i = 0; i < count; i++)
685 array[i] = fdt32_to_cpu(cell[i]);
690 const u32 *fdtdec_locate_array(const void *blob, int node,
691 const char *prop_name, int count)
696 cell = get_prop_check_min_len(blob, node, prop_name,
697 sizeof(u32) * count, &err);
698 return err ? NULL : cell;
701 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
706 debug("%s: %s\n", __func__, prop_name);
707 cell = fdt_getprop(blob, node, prop_name, &len);
711 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
712 const char *list_name,
713 const char *cells_name,
714 int cell_count, int index,
715 struct fdtdec_phandle_args *out_args)
717 const __be32 *list, *list_end;
718 int rc = 0, size, cur_index = 0;
723 /* Retrieve the phandle list property */
724 list = fdt_getprop(blob, src_node, list_name, &size);
727 list_end = list + size / sizeof(*list);
729 /* Loop over the phandles until all the requested entry is found */
730 while (list < list_end) {
735 * If phandle is 0, then it is an empty entry with no
736 * arguments. Skip forward to the next entry.
738 phandle = be32_to_cpup(list++);
741 * Find the provider node and parse the #*-cells
742 * property to determine the argument length.
744 * This is not needed if the cell count is hard-coded
745 * (i.e. cells_name not set, but cell_count is set),
746 * except when we're going to return the found node
749 if (cells_name || cur_index == index) {
750 node = fdt_node_offset_by_phandle(blob,
753 debug("%s: could not find phandle\n",
754 fdt_get_name(blob, src_node,
761 count = fdtdec_get_int(blob, node, cells_name,
764 debug("%s: could not get %s for %s\n",
765 fdt_get_name(blob, src_node,
768 fdt_get_name(blob, node,
777 * Make sure that the arguments actually fit in the
778 * remaining property data length
780 if (list + count > list_end) {
781 debug("%s: arguments longer than property\n",
782 fdt_get_name(blob, src_node, NULL));
788 * All of the error cases above bail out of the loop, so at
789 * this point, the parsing is successful. If the requested
790 * index matches, then fill the out_args structure and return,
791 * or return -ENOENT for an empty entry.
794 if (cur_index == index) {
801 if (count > MAX_PHANDLE_ARGS) {
802 debug("%s: too many arguments %d\n",
803 fdt_get_name(blob, src_node,
805 count = MAX_PHANDLE_ARGS;
807 out_args->node = node;
808 out_args->args_count = count;
809 for (i = 0; i < count; i++) {
811 be32_to_cpup(list++);
815 /* Found it! return success */
825 * Result will be one of:
826 * -ENOENT : index is for empty phandle
827 * -EINVAL : parsing error on data
828 * [1..n] : Number of phandle (count mode; when index = -1)
830 rc = index < 0 ? cur_index : -ENOENT;
835 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
836 u8 *array, int count)
841 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
843 memcpy(array, cell, count);
847 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
848 const char *prop_name, int count)
853 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
859 int fdtdec_get_config_int(const void *blob, const char *prop_name,
864 debug("%s: %s\n", __func__, prop_name);
865 config_node = fdt_path_offset(blob, "/config");
868 return fdtdec_get_int(blob, config_node, prop_name, default_val);
871 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
876 debug("%s: %s\n", __func__, prop_name);
877 config_node = fdt_path_offset(blob, "/config");
880 prop = fdt_get_property(blob, config_node, prop_name, NULL);
885 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
891 debug("%s: %s\n", __func__, prop_name);
892 nodeoffset = fdt_path_offset(blob, "/config");
896 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
900 return (char *)nodep;
903 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
904 fdt_addr_t *basep, fdt_size_t *sizep)
906 const fdt_addr_t *cell;
909 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
911 cell = fdt_getprop(blob, node, prop_name, &len);
912 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
913 debug("cell=%p, len=%d\n", cell, len);
917 *basep = fdt_addr_to_cpu(*cell);
918 *sizep = fdt_size_to_cpu(cell[1]);
919 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
926 * Read a flash entry from the fdt
928 * @param blob FDT blob
929 * @param node Offset of node to read
930 * @param name Name of node being read
931 * @param entry Place to put offset and size of this node
932 * @return 0 if ok, -ve on error
934 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
935 struct fmap_entry *entry)
940 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
941 debug("Node '%s' has bad/missing 'reg' property\n", name);
942 return -FDT_ERR_NOTFOUND;
944 entry->offset = reg[0];
945 entry->length = reg[1];
946 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
947 prop = fdt_getprop(blob, node, "compress", NULL);
948 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
949 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
950 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
951 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
952 entry->hash = (uint8_t *)prop;
957 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
962 number = (number << 32) | fdt32_to_cpu(*ptr++);
967 int fdt_get_resource(const void *fdt, int node, const char *property,
968 unsigned int index, struct fdt_resource *res)
970 const fdt32_t *ptr, *end;
971 int na, ns, len, parent;
974 parent = fdt_parent_offset(fdt, node);
978 na = fdt_address_cells(fdt, parent);
979 ns = fdt_size_cells(fdt, parent);
981 ptr = fdt_getprop(fdt, node, property, &len);
985 end = ptr + len / sizeof(*ptr);
987 while (ptr + na + ns <= end) {
989 res->start = res->end = fdtdec_get_number(ptr, na);
990 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
998 return -FDT_ERR_NOTFOUND;
1001 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1002 const char *prop_names, const char *name,
1003 struct fdt_resource *res)
1007 index = fdt_find_string(fdt, node, prop_names, name);
1011 return fdt_get_resource(fdt, node, property, index, res);
1014 int fdtdec_decode_memory_region(const void *blob, int config_node,
1015 const char *mem_type, const char *suffix,
1016 fdt_addr_t *basep, fdt_size_t *sizep)
1020 fdt_size_t size, offset_size;
1021 fdt_addr_t base, offset;
1024 if (config_node == -1) {
1025 config_node = fdt_path_offset(blob, "/config");
1026 if (config_node < 0) {
1027 debug("%s: Cannot find /config node\n", __func__);
1034 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1036 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1038 debug("%s: No memory type for '%s', using /memory\n", __func__,
1043 node = fdt_path_offset(blob, mem);
1045 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1046 fdt_strerror(node));
1051 * Not strictly correct - the memory may have multiple banks. We just
1054 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1055 debug("%s: Failed to decode memory region %s\n", __func__,
1060 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1062 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1064 debug("%s: Failed to decode memory region '%s'\n", __func__,
1069 *basep = base + offset;
1070 *sizep = offset_size;
1075 static int decode_timing_property(const void *blob, int node, const char *name,
1076 struct timing_entry *result)
1078 int length, ret = 0;
1081 prop = fdt_getprop(blob, node, name, &length);
1083 debug("%s: could not find property %s\n",
1084 fdt_get_name(blob, node, NULL), name);
1088 if (length == sizeof(u32)) {
1089 result->typ = fdtdec_get_int(blob, node, name, 0);
1090 result->min = result->typ;
1091 result->max = result->typ;
1093 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1099 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1100 struct display_timing *dt)
1102 int i, node, timings_node;
1106 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1107 if (timings_node < 0)
1108 return timings_node;
1110 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1111 node > 0 && i != index;
1112 node = fdt_next_subnode(blob, node))
1118 memset(dt, 0, sizeof(*dt));
1120 ret |= decode_timing_property(blob, node, "hback-porch",
1122 ret |= decode_timing_property(blob, node, "hfront-porch",
1124 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1125 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1126 ret |= decode_timing_property(blob, node, "vback-porch",
1128 ret |= decode_timing_property(blob, node, "vfront-porch",
1130 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1131 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1132 ret |= decode_timing_property(blob, node, "clock-frequency",
1136 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1138 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1139 DISPLAY_FLAGS_VSYNC_LOW;
1141 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1143 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1144 DISPLAY_FLAGS_HSYNC_LOW;
1146 val = fdtdec_get_int(blob, node, "de-active", -1);
1148 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1149 DISPLAY_FLAGS_DE_LOW;
1151 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1153 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1154 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1157 if (fdtdec_get_bool(blob, node, "interlaced"))
1158 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1159 if (fdtdec_get_bool(blob, node, "doublescan"))
1160 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1161 if (fdtdec_get_bool(blob, node, "doubleclk"))
1162 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1167 int fdtdec_setup(void)
1169 #if CONFIG_IS_ENABLED(OF_CONTROL)
1170 # ifdef CONFIG_OF_EMBED
1171 /* Get a pointer to the FDT */
1172 gd->fdt_blob = __dtb_dt_begin;
1173 # elif defined CONFIG_OF_SEPARATE
1174 # ifdef CONFIG_SPL_BUILD
1175 /* FDT is at end of BSS unless it is in a different memory region */
1176 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1177 gd->fdt_blob = (ulong *)&_image_binary_end;
1179 gd->fdt_blob = (ulong *)&__bss_end;
1181 /* FDT is at end of image */
1182 gd->fdt_blob = (ulong *)&_end;
1184 # elif defined(CONFIG_OF_HOSTFILE)
1185 if (sandbox_read_fdt_from_file()) {
1186 puts("Failed to read control FDT\n");
1190 # ifndef CONFIG_SPL_BUILD
1191 /* Allow the early environment to override the fdt address */
1192 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1193 (uintptr_t)gd->fdt_blob);
1196 return fdtdec_prepare_fdt();
1199 #endif /* !USE_HOSTCC */