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"),
78 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
81 const char *fdtdec_get_compatible(enum fdt_compat_id id)
83 /* We allow reading of the 'unknown' ID for testing purposes */
84 assert(id >= 0 && id < COMPAT_COUNT);
85 return compat_names[id];
88 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
89 const char *prop_name, int index, int na, int ns,
92 const fdt32_t *prop, *prop_end;
93 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
97 debug("%s: %s: ", __func__, prop_name);
99 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
100 debug("(na too large for fdt_addr_t type)\n");
101 return FDT_ADDR_T_NONE;
104 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
105 debug("(ns too large for fdt_size_t type)\n");
106 return FDT_ADDR_T_NONE;
109 prop = fdt_getprop(blob, node, prop_name, &len);
111 debug("(not found)\n");
112 return FDT_ADDR_T_NONE;
114 prop_end = prop + (len / sizeof(*prop));
116 prop_addr = prop + (index * (na + ns));
117 prop_size = prop_addr + na;
118 prop_after_size = prop_size + ns;
119 if (prop_after_size > prop_end) {
120 debug("(not enough data: expected >= %d cells, got %d cells)\n",
121 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
122 return FDT_ADDR_T_NONE;
125 addr = fdtdec_get_number(prop_addr, na);
128 *sizep = fdtdec_get_number(prop_size, ns);
129 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep);
131 debug("addr=%08llx\n", (u64)addr);
137 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
138 int node, const char *prop_name, int index, fdt_size_t *sizep)
142 debug("%s: ", __func__);
144 na = fdt_address_cells(blob, parent);
146 debug("(bad #address-cells)\n");
147 return FDT_ADDR_T_NONE;
150 ns = fdt_size_cells(blob, parent);
152 debug("(bad #size-cells)\n");
153 return FDT_ADDR_T_NONE;
156 debug("na=%d, ns=%d, ", na, ns);
158 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
162 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
163 const char *prop_name, int index, fdt_size_t *sizep)
167 debug("%s: ", __func__);
169 parent = fdt_parent_offset(blob, node);
171 debug("(no parent found)\n");
172 return FDT_ADDR_T_NONE;
175 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
179 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
180 const char *prop_name, fdt_size_t *sizep)
182 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
184 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
185 sizeof(fdt_addr_t) / sizeof(fdt32_t),
189 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
190 const char *prop_name)
192 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
195 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
196 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
197 const char *prop_name, struct fdt_pci_addr *addr)
203 debug("%s: %s: ", __func__, prop_name);
206 * If we follow the pci bus bindings strictly, we should check
207 * the value of the node's parent node's #address-cells and
208 * #size-cells. They need to be 3 and 2 accordingly. However,
209 * for simplicity we skip the check here.
211 cell = fdt_getprop(blob, node, prop_name, &len);
215 if ((len % FDT_PCI_REG_SIZE) == 0) {
216 int num = len / FDT_PCI_REG_SIZE;
219 for (i = 0; i < num; i++) {
220 debug("pci address #%d: %08lx %08lx %08lx\n", i,
221 (ulong)fdt32_to_cpu(cell[0]),
222 (ulong)fdt32_to_cpu(cell[1]),
223 (ulong)fdt32_to_cpu(cell[2]));
224 if ((fdt32_to_cpu(*cell) & type) == type) {
225 addr->phys_hi = fdt32_to_cpu(cell[0]);
226 addr->phys_mid = fdt32_to_cpu(cell[1]);
227 addr->phys_lo = fdt32_to_cpu(cell[1]);
230 cell += (FDT_PCI_ADDR_CELLS +
246 debug("(not found)\n");
250 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
252 const char *list, *end;
255 list = fdt_getprop(blob, node, "compatible", &len);
264 if (len >= strlen("pciVVVV,DDDD")) {
265 s = strstr(list, "pci");
268 * check if the string is something like pciVVVV,DDDD.RR
269 * or just pciVVVV,DDDD
271 if (s && s[7] == ',' &&
272 (s[12] == '.' || s[12] == 0)) {
274 *vendor = simple_strtol(s, NULL, 16);
277 *device = simple_strtol(s, NULL, 16);
288 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
293 /* extract the bar number from fdt_pci_addr */
294 barnum = addr->phys_hi & 0xff;
295 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
298 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
299 *bar = dm_pci_read_bar32(dev, barnum);
305 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
306 uint64_t default_val)
308 const uint64_t *cell64;
311 cell64 = fdt_getprop(blob, node, prop_name, &length);
312 if (!cell64 || length < sizeof(*cell64))
315 return fdt64_to_cpu(*cell64);
318 int fdtdec_get_is_enabled(const void *blob, int node)
323 * It should say "okay", so only allow that. Some fdts use "ok" but
324 * this is a bug. Please fix your device tree source file. See here
327 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
329 cell = fdt_getprop(blob, node, "status", NULL);
331 return 0 == strcmp(cell, "okay");
335 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
337 enum fdt_compat_id id;
339 /* Search our drivers */
340 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
341 if (0 == fdt_node_check_compatible(blob, node,
344 return COMPAT_UNKNOWN;
347 int fdtdec_next_compatible(const void *blob, int node,
348 enum fdt_compat_id id)
350 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
353 int fdtdec_next_compatible_subnode(const void *blob, int node,
354 enum fdt_compat_id id, int *depthp)
357 node = fdt_next_node(blob, node, depthp);
358 } while (*depthp > 1);
360 /* If this is a direct subnode, and compatible, return it */
361 if (*depthp == 1 && 0 == fdt_node_check_compatible(
362 blob, node, compat_names[id]))
365 return -FDT_ERR_NOTFOUND;
368 int fdtdec_next_alias(const void *blob, const char *name,
369 enum fdt_compat_id id, int *upto)
371 #define MAX_STR_LEN 20
372 char str[MAX_STR_LEN + 20];
375 /* snprintf() is not available */
376 assert(strlen(name) < MAX_STR_LEN);
377 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
378 node = fdt_path_offset(blob, str);
381 err = fdt_node_check_compatible(blob, node, compat_names[id]);
385 return -FDT_ERR_NOTFOUND;
390 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
391 enum fdt_compat_id id, int *node_list, int maxcount)
393 memset(node_list, '\0', sizeof(*node_list) * maxcount);
395 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
398 /* TODO: Can we tighten this code up a little? */
399 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
400 enum fdt_compat_id id, int *node_list, int maxcount)
402 int name_len = strlen(name);
410 /* find the alias node if present */
411 alias_node = fdt_path_offset(blob, "/aliases");
414 * start with nothing, and we can assume that the root node can't
417 memset(nodes, '\0', sizeof(nodes));
419 /* First find all the compatible nodes */
420 for (node = count = 0; node >= 0 && count < maxcount;) {
421 node = fdtdec_next_compatible(blob, node, id);
423 nodes[count++] = node;
426 debug("%s: warning: maxcount exceeded with alias '%s'\n",
429 /* Now find all the aliases */
430 for (offset = fdt_first_property_offset(blob, alias_node);
432 offset = fdt_next_property_offset(blob, offset)) {
433 const struct fdt_property *prop;
439 prop = fdt_get_property_by_offset(blob, offset, NULL);
440 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
441 if (prop->len && 0 == strncmp(path, name, name_len))
442 node = fdt_path_offset(blob, prop->data);
446 /* Get the alias number */
447 number = simple_strtoul(path + name_len, NULL, 10);
448 if (number < 0 || number >= maxcount) {
449 debug("%s: warning: alias '%s' is out of range\n",
454 /* Make sure the node we found is actually in our list! */
456 for (j = 0; j < count; j++)
457 if (nodes[j] == node) {
463 debug("%s: warning: alias '%s' points to a node "
464 "'%s' that is missing or is not compatible "
465 " with '%s'\n", __func__, path,
466 fdt_get_name(blob, node, NULL),
472 * Add this node to our list in the right place, and mark
475 if (fdtdec_get_is_enabled(blob, node)) {
476 if (node_list[number]) {
477 debug("%s: warning: alias '%s' requires that "
478 "a node be placed in the list in a "
479 "position which is already filled by "
480 "node '%s'\n", __func__, path,
481 fdt_get_name(blob, node, NULL));
484 node_list[number] = node;
485 if (number >= num_found)
486 num_found = number + 1;
491 /* Add any nodes not mentioned by an alias */
492 for (i = j = 0; i < maxcount; i++) {
494 for (; j < maxcount; j++)
496 fdtdec_get_is_enabled(blob, nodes[j]))
499 /* Have we run out of nodes to add? */
503 assert(!node_list[i]);
504 node_list[i] = nodes[j++];
513 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
516 int base_len = strlen(base);
517 const char *find_name;
522 find_name = fdt_get_name(blob, offset, &find_namelen);
523 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
525 aliases = fdt_path_offset(blob, "/aliases");
526 for (prop_offset = fdt_first_property_offset(blob, aliases);
528 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
534 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
535 debug(" - %s, %s\n", name, prop);
536 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
537 strncmp(name, base, base_len))
540 slash = strrchr(prop, '/');
541 if (strcmp(slash + 1, find_name))
543 val = trailing_strtol(name);
546 debug("Found seq %d\n", *seqp);
551 debug("Not found\n");
555 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
561 chosen_node = fdt_path_offset(blob, "/chosen");
562 return fdt_getprop(blob, chosen_node, name, NULL);
565 int fdtdec_get_chosen_node(const void *blob, const char *name)
569 prop = fdtdec_get_chosen_prop(blob, name);
571 return -FDT_ERR_NOTFOUND;
572 return fdt_path_offset(blob, prop);
575 int fdtdec_check_fdt(void)
578 * We must have an FDT, but we cannot panic() yet since the console
579 * is not ready. So for now, just assert(). Boards which need an early
580 * FDT (prior to console ready) will need to make their own
581 * arrangements and do their own checks.
583 assert(!fdtdec_prepare_fdt());
588 * This function is a little odd in that it accesses global data. At some
589 * point if the architecture board.c files merge this will make more sense.
590 * Even now, it is common code.
592 int fdtdec_prepare_fdt(void)
594 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
595 fdt_check_header(gd->fdt_blob)) {
596 #ifdef CONFIG_SPL_BUILD
597 puts("Missing DTB\n");
599 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");
602 printf("fdt_blob=%p\n", gd->fdt_blob);
603 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
613 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
618 debug("%s: %s\n", __func__, prop_name);
619 phandle = fdt_getprop(blob, node, prop_name, NULL);
621 return -FDT_ERR_NOTFOUND;
623 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
628 * Look up a property in a node and check that it has a minimum length.
630 * @param blob FDT blob
631 * @param node node to examine
632 * @param prop_name name of property to find
633 * @param min_len minimum property length in bytes
634 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
635 found, or -FDT_ERR_BADLAYOUT if not enough data
636 * @return pointer to cell, which is only valid if err == 0
638 static const void *get_prop_check_min_len(const void *blob, int node,
639 const char *prop_name, int min_len, int *err)
644 debug("%s: %s\n", __func__, prop_name);
645 cell = fdt_getprop(blob, node, prop_name, &len);
647 *err = -FDT_ERR_NOTFOUND;
648 else if (len < min_len)
649 *err = -FDT_ERR_BADLAYOUT;
655 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
656 u32 *array, int count)
661 debug("%s: %s\n", __func__, prop_name);
662 cell = get_prop_check_min_len(blob, node, prop_name,
663 sizeof(u32) * count, &err);
665 for (i = 0; i < count; i++)
666 array[i] = fdt32_to_cpu(cell[i]);
671 int fdtdec_get_int_array_count(const void *blob, int node,
672 const char *prop_name, u32 *array, int count)
678 debug("%s: %s\n", __func__, prop_name);
679 cell = fdt_getprop(blob, node, prop_name, &len);
681 return -FDT_ERR_NOTFOUND;
682 elems = len / sizeof(u32);
685 for (i = 0; i < count; i++)
686 array[i] = fdt32_to_cpu(cell[i]);
691 const u32 *fdtdec_locate_array(const void *blob, int node,
692 const char *prop_name, int count)
697 cell = get_prop_check_min_len(blob, node, prop_name,
698 sizeof(u32) * count, &err);
699 return err ? NULL : cell;
702 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
707 debug("%s: %s\n", __func__, prop_name);
708 cell = fdt_getprop(blob, node, prop_name, &len);
712 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
713 const char *list_name,
714 const char *cells_name,
715 int cell_count, int index,
716 struct fdtdec_phandle_args *out_args)
718 const __be32 *list, *list_end;
719 int rc = 0, size, cur_index = 0;
724 /* Retrieve the phandle list property */
725 list = fdt_getprop(blob, src_node, list_name, &size);
728 list_end = list + size / sizeof(*list);
730 /* Loop over the phandles until all the requested entry is found */
731 while (list < list_end) {
736 * If phandle is 0, then it is an empty entry with no
737 * arguments. Skip forward to the next entry.
739 phandle = be32_to_cpup(list++);
742 * Find the provider node and parse the #*-cells
743 * property to determine the argument length.
745 * This is not needed if the cell count is hard-coded
746 * (i.e. cells_name not set, but cell_count is set),
747 * except when we're going to return the found node
750 if (cells_name || cur_index == index) {
751 node = fdt_node_offset_by_phandle(blob,
754 debug("%s: could not find phandle\n",
755 fdt_get_name(blob, src_node,
762 count = fdtdec_get_int(blob, node, cells_name,
765 debug("%s: could not get %s for %s\n",
766 fdt_get_name(blob, src_node,
769 fdt_get_name(blob, node,
778 * Make sure that the arguments actually fit in the
779 * remaining property data length
781 if (list + count > list_end) {
782 debug("%s: arguments longer than property\n",
783 fdt_get_name(blob, src_node, NULL));
789 * All of the error cases above bail out of the loop, so at
790 * this point, the parsing is successful. If the requested
791 * index matches, then fill the out_args structure and return,
792 * or return -ENOENT for an empty entry.
795 if (cur_index == index) {
802 if (count > MAX_PHANDLE_ARGS) {
803 debug("%s: too many arguments %d\n",
804 fdt_get_name(blob, src_node,
806 count = MAX_PHANDLE_ARGS;
808 out_args->node = node;
809 out_args->args_count = count;
810 for (i = 0; i < count; i++) {
812 be32_to_cpup(list++);
816 /* Found it! return success */
826 * Result will be one of:
827 * -ENOENT : index is for empty phandle
828 * -EINVAL : parsing error on data
829 * [1..n] : Number of phandle (count mode; when index = -1)
831 rc = index < 0 ? cur_index : -ENOENT;
836 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
837 u8 *array, int count)
842 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
844 memcpy(array, cell, count);
848 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
849 const char *prop_name, int count)
854 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
860 int fdtdec_get_config_int(const void *blob, const char *prop_name,
865 debug("%s: %s\n", __func__, prop_name);
866 config_node = fdt_path_offset(blob, "/config");
869 return fdtdec_get_int(blob, config_node, prop_name, default_val);
872 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
877 debug("%s: %s\n", __func__, prop_name);
878 config_node = fdt_path_offset(blob, "/config");
881 prop = fdt_get_property(blob, config_node, prop_name, NULL);
886 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
892 debug("%s: %s\n", __func__, prop_name);
893 nodeoffset = fdt_path_offset(blob, "/config");
897 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
901 return (char *)nodep;
904 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
905 fdt_addr_t *basep, fdt_size_t *sizep)
907 const fdt_addr_t *cell;
910 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
912 cell = fdt_getprop(blob, node, prop_name, &len);
913 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
914 debug("cell=%p, len=%d\n", cell, len);
918 *basep = fdt_addr_to_cpu(*cell);
919 *sizep = fdt_size_to_cpu(cell[1]);
920 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
927 * Read a flash entry from the fdt
929 * @param blob FDT blob
930 * @param node Offset of node to read
931 * @param name Name of node being read
932 * @param entry Place to put offset and size of this node
933 * @return 0 if ok, -ve on error
935 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
936 struct fmap_entry *entry)
941 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
942 debug("Node '%s' has bad/missing 'reg' property\n", name);
943 return -FDT_ERR_NOTFOUND;
945 entry->offset = reg[0];
946 entry->length = reg[1];
947 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
948 prop = fdt_getprop(blob, node, "compress", NULL);
949 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
950 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
951 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
952 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
953 entry->hash = (uint8_t *)prop;
958 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
963 number = (number << 32) | fdt32_to_cpu(*ptr++);
968 int fdt_get_resource(const void *fdt, int node, const char *property,
969 unsigned int index, struct fdt_resource *res)
971 const fdt32_t *ptr, *end;
972 int na, ns, len, parent;
975 parent = fdt_parent_offset(fdt, node);
979 na = fdt_address_cells(fdt, parent);
980 ns = fdt_size_cells(fdt, parent);
982 ptr = fdt_getprop(fdt, node, property, &len);
986 end = ptr + len / sizeof(*ptr);
988 while (ptr + na + ns <= end) {
990 res->start = res->end = fdtdec_get_number(ptr, na);
991 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
999 return -FDT_ERR_NOTFOUND;
1002 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1003 const char *prop_names, const char *name,
1004 struct fdt_resource *res)
1008 index = fdt_find_string(fdt, node, prop_names, name);
1012 return fdt_get_resource(fdt, node, property, index, res);
1015 int fdtdec_decode_memory_region(const void *blob, int config_node,
1016 const char *mem_type, const char *suffix,
1017 fdt_addr_t *basep, fdt_size_t *sizep)
1021 fdt_size_t size, offset_size;
1022 fdt_addr_t base, offset;
1025 if (config_node == -1) {
1026 config_node = fdt_path_offset(blob, "/config");
1027 if (config_node < 0) {
1028 debug("%s: Cannot find /config node\n", __func__);
1035 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1037 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1039 debug("%s: No memory type for '%s', using /memory\n", __func__,
1044 node = fdt_path_offset(blob, mem);
1046 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1047 fdt_strerror(node));
1052 * Not strictly correct - the memory may have multiple banks. We just
1055 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1056 debug("%s: Failed to decode memory region %s\n", __func__,
1061 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1063 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1065 debug("%s: Failed to decode memory region '%s'\n", __func__,
1070 *basep = base + offset;
1071 *sizep = offset_size;
1076 static int decode_timing_property(const void *blob, int node, const char *name,
1077 struct timing_entry *result)
1079 int length, ret = 0;
1082 prop = fdt_getprop(blob, node, name, &length);
1084 debug("%s: could not find property %s\n",
1085 fdt_get_name(blob, node, NULL), name);
1089 if (length == sizeof(u32)) {
1090 result->typ = fdtdec_get_int(blob, node, name, 0);
1091 result->min = result->typ;
1092 result->max = result->typ;
1094 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1100 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1101 struct display_timing *dt)
1103 int i, node, timings_node;
1107 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1108 if (timings_node < 0)
1109 return timings_node;
1111 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1112 node > 0 && i != index;
1113 node = fdt_next_subnode(blob, node))
1119 memset(dt, 0, sizeof(*dt));
1121 ret |= decode_timing_property(blob, node, "hback-porch",
1123 ret |= decode_timing_property(blob, node, "hfront-porch",
1125 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1126 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1127 ret |= decode_timing_property(blob, node, "vback-porch",
1129 ret |= decode_timing_property(blob, node, "vfront-porch",
1131 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1132 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1133 ret |= decode_timing_property(blob, node, "clock-frequency",
1137 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1139 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1140 DISPLAY_FLAGS_VSYNC_LOW;
1142 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1144 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1145 DISPLAY_FLAGS_HSYNC_LOW;
1147 val = fdtdec_get_int(blob, node, "de-active", -1);
1149 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1150 DISPLAY_FLAGS_DE_LOW;
1152 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1154 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1155 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1158 if (fdtdec_get_bool(blob, node, "interlaced"))
1159 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1160 if (fdtdec_get_bool(blob, node, "doublescan"))
1161 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1162 if (fdtdec_get_bool(blob, node, "doubleclk"))
1163 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1168 int fdtdec_setup(void)
1170 #if CONFIG_IS_ENABLED(OF_CONTROL)
1171 # ifdef CONFIG_OF_EMBED
1172 /* Get a pointer to the FDT */
1173 gd->fdt_blob = __dtb_dt_begin;
1174 # elif defined CONFIG_OF_SEPARATE
1175 # ifdef CONFIG_SPL_BUILD
1176 /* FDT is at end of BSS unless it is in a different memory region */
1177 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1178 gd->fdt_blob = (ulong *)&_image_binary_end;
1180 gd->fdt_blob = (ulong *)&__bss_end;
1182 /* FDT is at end of image */
1183 gd->fdt_blob = (ulong *)&_end;
1185 # elif defined(CONFIG_OF_HOSTFILE)
1186 if (sandbox_read_fdt_from_file()) {
1187 puts("Failed to read control FDT\n");
1191 # ifndef CONFIG_SPL_BUILD
1192 /* Allow the early environment to override the fdt address */
1193 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1194 (uintptr_t)gd->fdt_blob);
1197 return fdtdec_prepare_fdt();
1200 #endif /* !USE_HOSTCC */