2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/sections.h>
13 #include <linux/ctype.h>
15 DECLARE_GLOBAL_DATA_PTR;
18 * Here are the type we know about. One day we might allow drivers to
19 * register. For now we just put them here. The COMPAT macro allows us to
20 * turn this into a sparse list later, and keeps the ID with the name.
22 #define COMPAT(id, name) name
23 static const char * const compat_names[COMPAT_COUNT] = {
24 COMPAT(UNKNOWN, "<none>"),
25 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
26 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
27 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
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_PCIE, "nvidia,tegra124-pcie"),
39 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"),
40 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"),
41 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
42 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
43 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
44 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
45 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
46 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
47 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
48 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
49 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
50 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
51 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
52 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
53 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
54 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
55 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
56 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
57 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
58 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
59 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
60 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
61 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
62 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645tt"),
63 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
64 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
65 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
66 COMPAT(INTEL_MICROCODE, "intel,microcode"),
67 COMPAT(MEMORY_SPD, "memory-spd"),
68 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
69 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
70 COMPAT(INTEL_GMA, "intel,gma"),
71 COMPAT(AMS_AS3722, "ams,as3722"),
72 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
73 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
74 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"),
75 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
76 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
77 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
78 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
79 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
80 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
83 const char *fdtdec_get_compatible(enum fdt_compat_id id)
85 /* We allow reading of the 'unknown' ID for testing purposes */
86 assert(id >= 0 && id < COMPAT_COUNT);
87 return compat_names[id];
90 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
91 const char *prop_name, fdt_size_t *sizep)
93 const fdt_addr_t *cell;
96 debug("%s: %s: ", __func__, prop_name);
97 cell = fdt_getprop(blob, node, prop_name, &len);
98 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
99 len == sizeof(fdt_addr_t) * 2)) {
100 fdt_addr_t addr = fdt_addr_to_cpu(*cell);
102 const fdt_size_t *size;
104 size = (fdt_size_t *)((char *)cell +
106 *sizep = fdt_size_to_cpu(*size);
107 debug("addr=%08lx, size=%llx\n",
108 (ulong)addr, (u64)*sizep);
110 debug("%08lx\n", (ulong)addr);
114 debug("(not found)\n");
115 return FDT_ADDR_T_NONE;
118 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
119 const char *prop_name)
121 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
125 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
126 const char *prop_name, struct fdt_pci_addr *addr)
132 debug("%s: %s: ", __func__, prop_name);
135 * If we follow the pci bus bindings strictly, we should check
136 * the value of the node's parent node's #address-cells and
137 * #size-cells. They need to be 3 and 2 accordingly. However,
138 * for simplicity we skip the check here.
140 cell = fdt_getprop(blob, node, prop_name, &len);
144 if ((len % FDT_PCI_REG_SIZE) == 0) {
145 int num = len / FDT_PCI_REG_SIZE;
148 for (i = 0; i < num; i++) {
149 debug("pci address #%d: %08lx %08lx %08lx\n", i,
150 (ulong)fdt_addr_to_cpu(cell[0]),
151 (ulong)fdt_addr_to_cpu(cell[1]),
152 (ulong)fdt_addr_to_cpu(cell[2]));
153 if ((fdt_addr_to_cpu(*cell) & type) == type) {
154 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
155 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
156 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
159 cell += (FDT_PCI_ADDR_CELLS +
175 debug("(not found)\n");
179 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
181 const char *list, *end;
184 list = fdt_getprop(blob, node, "compatible", &len);
193 if (len >= strlen("pciVVVV,DDDD")) {
194 s = strstr(list, "pci");
197 * check if the string is something like pciVVVV,DDDD.RR
198 * or just pciVVVV,DDDD
200 if (s && s[7] == ',' &&
201 (s[12] == '.' || s[12] == 0)) {
203 *vendor = simple_strtol(s, NULL, 16);
206 *device = simple_strtol(s, NULL, 16);
217 int fdtdec_get_pci_bdf(const void *blob, int node,
218 struct fdt_pci_addr *addr, pci_dev_t *bdf)
220 u16 dt_vendor, dt_device, vendor, device;
223 /* get vendor id & device id from the compatible string */
224 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
228 /* extract the bdf from fdt_pci_addr */
229 *bdf = addr->phys_hi & 0xffff00;
231 /* read vendor id & device id based on bdf */
232 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
233 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
236 * Note there are two places in the device tree to fully describe
237 * a pci device: one is via compatible string with a format of
238 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
239 * the device node's reg address property. We read the vendor id
240 * and device id based on bdf and compare the values with the
241 * "VVVV,DDDD". If they are the same, then we are good to use bdf
242 * to read device's bar. But if they are different, we have to rely
243 * on the vendor id and device id extracted from the compatible
244 * string and locate the real bdf by pci_find_device(). This is
245 * because normally we may only know device's device number and
246 * function number when writing device tree. The bus number is
247 * dynamically assigned during the pci enumeration process.
249 if ((dt_vendor != vendor) || (dt_device != device)) {
250 *bdf = pci_find_device(dt_vendor, dt_device, 0);
258 int fdtdec_get_pci_bar32(const void *blob, int node,
259 struct fdt_pci_addr *addr, u32 *bar)
265 /* get pci devices's bdf */
266 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
270 /* extract the bar number from fdt_pci_addr */
271 barnum = addr->phys_hi & 0xff;
272 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
275 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
276 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
282 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
283 uint64_t default_val)
285 const uint64_t *cell64;
288 cell64 = fdt_getprop(blob, node, prop_name, &length);
289 if (!cell64 || length < sizeof(*cell64))
292 return fdt64_to_cpu(*cell64);
295 int fdtdec_get_is_enabled(const void *blob, int node)
300 * It should say "okay", so only allow that. Some fdts use "ok" but
301 * this is a bug. Please fix your device tree source file. See here
304 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
306 cell = fdt_getprop(blob, node, "status", NULL);
308 return 0 == strcmp(cell, "okay");
312 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
314 enum fdt_compat_id id;
316 /* Search our drivers */
317 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
318 if (0 == fdt_node_check_compatible(blob, node,
321 return COMPAT_UNKNOWN;
324 int fdtdec_next_compatible(const void *blob, int node,
325 enum fdt_compat_id id)
327 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
330 int fdtdec_next_compatible_subnode(const void *blob, int node,
331 enum fdt_compat_id id, int *depthp)
334 node = fdt_next_node(blob, node, depthp);
335 } while (*depthp > 1);
337 /* If this is a direct subnode, and compatible, return it */
338 if (*depthp == 1 && 0 == fdt_node_check_compatible(
339 blob, node, compat_names[id]))
342 return -FDT_ERR_NOTFOUND;
345 int fdtdec_next_alias(const void *blob, const char *name,
346 enum fdt_compat_id id, int *upto)
348 #define MAX_STR_LEN 20
349 char str[MAX_STR_LEN + 20];
352 /* snprintf() is not available */
353 assert(strlen(name) < MAX_STR_LEN);
354 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
355 node = fdt_path_offset(blob, str);
358 err = fdt_node_check_compatible(blob, node, compat_names[id]);
362 return -FDT_ERR_NOTFOUND;
367 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
368 enum fdt_compat_id id, int *node_list, int maxcount)
370 memset(node_list, '\0', sizeof(*node_list) * maxcount);
372 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
375 /* TODO: Can we tighten this code up a little? */
376 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
377 enum fdt_compat_id id, int *node_list, int maxcount)
379 int name_len = strlen(name);
387 /* find the alias node if present */
388 alias_node = fdt_path_offset(blob, "/aliases");
391 * start with nothing, and we can assume that the root node can't
394 memset(nodes, '\0', sizeof(nodes));
396 /* First find all the compatible nodes */
397 for (node = count = 0; node >= 0 && count < maxcount;) {
398 node = fdtdec_next_compatible(blob, node, id);
400 nodes[count++] = node;
403 debug("%s: warning: maxcount exceeded with alias '%s'\n",
406 /* Now find all the aliases */
407 for (offset = fdt_first_property_offset(blob, alias_node);
409 offset = fdt_next_property_offset(blob, offset)) {
410 const struct fdt_property *prop;
416 prop = fdt_get_property_by_offset(blob, offset, NULL);
417 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
418 if (prop->len && 0 == strncmp(path, name, name_len))
419 node = fdt_path_offset(blob, prop->data);
423 /* Get the alias number */
424 number = simple_strtoul(path + name_len, NULL, 10);
425 if (number < 0 || number >= maxcount) {
426 debug("%s: warning: alias '%s' is out of range\n",
431 /* Make sure the node we found is actually in our list! */
433 for (j = 0; j < count; j++)
434 if (nodes[j] == node) {
440 debug("%s: warning: alias '%s' points to a node "
441 "'%s' that is missing or is not compatible "
442 " with '%s'\n", __func__, path,
443 fdt_get_name(blob, node, NULL),
449 * Add this node to our list in the right place, and mark
452 if (fdtdec_get_is_enabled(blob, node)) {
453 if (node_list[number]) {
454 debug("%s: warning: alias '%s' requires that "
455 "a node be placed in the list in a "
456 "position which is already filled by "
457 "node '%s'\n", __func__, path,
458 fdt_get_name(blob, node, NULL));
461 node_list[number] = node;
462 if (number >= num_found)
463 num_found = number + 1;
468 /* Add any nodes not mentioned by an alias */
469 for (i = j = 0; i < maxcount; i++) {
471 for (; j < maxcount; j++)
473 fdtdec_get_is_enabled(blob, nodes[j]))
476 /* Have we run out of nodes to add? */
480 assert(!node_list[i]);
481 node_list[i] = nodes[j++];
490 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
493 int base_len = strlen(base);
494 const char *find_name;
499 find_name = fdt_get_name(blob, offset, &find_namelen);
500 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
502 aliases = fdt_path_offset(blob, "/aliases");
503 for (prop_offset = fdt_first_property_offset(blob, aliases);
505 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
511 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
512 debug(" - %s, %s\n", name, prop);
513 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
514 strncmp(name, base, base_len))
517 slash = strrchr(prop, '/');
518 if (strcmp(slash + 1, find_name))
520 val = trailing_strtol(name);
523 debug("Found seq %d\n", *seqp);
528 debug("Not found\n");
532 int fdtdec_get_chosen_node(const void *blob, const char *name)
539 return -FDT_ERR_NOTFOUND;
540 chosen_node = fdt_path_offset(blob, "/chosen");
541 prop = fdt_getprop(blob, chosen_node, name, &len);
543 return -FDT_ERR_NOTFOUND;
544 return fdt_path_offset(blob, prop);
547 int fdtdec_check_fdt(void)
550 * We must have an FDT, but we cannot panic() yet since the console
551 * is not ready. So for now, just assert(). Boards which need an early
552 * FDT (prior to console ready) will need to make their own
553 * arrangements and do their own checks.
555 assert(!fdtdec_prepare_fdt());
560 * This function is a little odd in that it accesses global data. At some
561 * point if the architecture board.c files merge this will make more sense.
562 * Even now, it is common code.
564 int fdtdec_prepare_fdt(void)
566 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
567 fdt_check_header(gd->fdt_blob)) {
568 #ifdef CONFIG_SPL_BUILD
569 puts("Missing DTB\n");
571 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");
574 printf("fdt_blob=%p\n", gd->fdt_blob);
575 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
585 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
590 debug("%s: %s\n", __func__, prop_name);
591 phandle = fdt_getprop(blob, node, prop_name, NULL);
593 return -FDT_ERR_NOTFOUND;
595 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
600 * Look up a property in a node and check that it has a minimum length.
602 * @param blob FDT blob
603 * @param node node to examine
604 * @param prop_name name of property to find
605 * @param min_len minimum property length in bytes
606 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
607 found, or -FDT_ERR_BADLAYOUT if not enough data
608 * @return pointer to cell, which is only valid if err == 0
610 static const void *get_prop_check_min_len(const void *blob, int node,
611 const char *prop_name, int min_len, int *err)
616 debug("%s: %s\n", __func__, prop_name);
617 cell = fdt_getprop(blob, node, prop_name, &len);
619 *err = -FDT_ERR_NOTFOUND;
620 else if (len < min_len)
621 *err = -FDT_ERR_BADLAYOUT;
627 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
628 u32 *array, int count)
633 debug("%s: %s\n", __func__, prop_name);
634 cell = get_prop_check_min_len(blob, node, prop_name,
635 sizeof(u32) * count, &err);
637 for (i = 0; i < count; i++)
638 array[i] = fdt32_to_cpu(cell[i]);
643 int fdtdec_get_int_array_count(const void *blob, int node,
644 const char *prop_name, u32 *array, int count)
650 debug("%s: %s\n", __func__, prop_name);
651 cell = fdt_getprop(blob, node, prop_name, &len);
653 return -FDT_ERR_NOTFOUND;
654 elems = len / sizeof(u32);
657 for (i = 0; i < count; i++)
658 array[i] = fdt32_to_cpu(cell[i]);
663 const u32 *fdtdec_locate_array(const void *blob, int node,
664 const char *prop_name, int count)
669 cell = get_prop_check_min_len(blob, node, prop_name,
670 sizeof(u32) * count, &err);
671 return err ? NULL : cell;
674 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
679 debug("%s: %s\n", __func__, prop_name);
680 cell = fdt_getprop(blob, node, prop_name, &len);
684 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
685 const char *list_name,
686 const char *cells_name,
687 int cell_count, int index,
688 struct fdtdec_phandle_args *out_args)
690 const __be32 *list, *list_end;
691 int rc = 0, size, cur_index = 0;
696 /* Retrieve the phandle list property */
697 list = fdt_getprop(blob, src_node, list_name, &size);
700 list_end = list + size / sizeof(*list);
702 /* Loop over the phandles until all the requested entry is found */
703 while (list < list_end) {
708 * If phandle is 0, then it is an empty entry with no
709 * arguments. Skip forward to the next entry.
711 phandle = be32_to_cpup(list++);
714 * Find the provider node and parse the #*-cells
715 * property to determine the argument length.
717 * This is not needed if the cell count is hard-coded
718 * (i.e. cells_name not set, but cell_count is set),
719 * except when we're going to return the found node
722 if (cells_name || cur_index == index) {
723 node = fdt_node_offset_by_phandle(blob,
726 debug("%s: could not find phandle\n",
727 fdt_get_name(blob, src_node,
734 count = fdtdec_get_int(blob, node, cells_name,
737 debug("%s: could not get %s for %s\n",
738 fdt_get_name(blob, src_node,
741 fdt_get_name(blob, node,
750 * Make sure that the arguments actually fit in the
751 * remaining property data length
753 if (list + count > list_end) {
754 debug("%s: arguments longer than property\n",
755 fdt_get_name(blob, src_node, NULL));
761 * All of the error cases above bail out of the loop, so at
762 * this point, the parsing is successful. If the requested
763 * index matches, then fill the out_args structure and return,
764 * or return -ENOENT for an empty entry.
767 if (cur_index == index) {
774 if (count > MAX_PHANDLE_ARGS) {
775 debug("%s: too many arguments %d\n",
776 fdt_get_name(blob, src_node,
778 count = MAX_PHANDLE_ARGS;
780 out_args->node = node;
781 out_args->args_count = count;
782 for (i = 0; i < count; i++) {
784 be32_to_cpup(list++);
788 /* Found it! return success */
798 * Result will be one of:
799 * -ENOENT : index is for empty phandle
800 * -EINVAL : parsing error on data
801 * [1..n] : Number of phandle (count mode; when index = -1)
803 rc = index < 0 ? cur_index : -ENOENT;
808 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
809 u8 *array, int count)
814 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
816 memcpy(array, cell, count);
820 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
821 const char *prop_name, int count)
826 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
832 int fdtdec_get_config_int(const void *blob, const char *prop_name,
837 debug("%s: %s\n", __func__, prop_name);
838 config_node = fdt_path_offset(blob, "/config");
841 return fdtdec_get_int(blob, config_node, prop_name, default_val);
844 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
849 debug("%s: %s\n", __func__, prop_name);
850 config_node = fdt_path_offset(blob, "/config");
853 prop = fdt_get_property(blob, config_node, prop_name, NULL);
858 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
864 debug("%s: %s\n", __func__, prop_name);
865 nodeoffset = fdt_path_offset(blob, "/config");
869 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
873 return (char *)nodep;
876 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
877 fdt_addr_t *basep, fdt_size_t *sizep)
879 const fdt_addr_t *cell;
882 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
884 cell = fdt_getprop(blob, node, prop_name, &len);
885 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
886 debug("cell=%p, len=%d\n", cell, len);
890 *basep = fdt_addr_to_cpu(*cell);
891 *sizep = fdt_size_to_cpu(cell[1]);
892 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
899 * Read a flash entry from the fdt
901 * @param blob FDT blob
902 * @param node Offset of node to read
903 * @param name Name of node being read
904 * @param entry Place to put offset and size of this node
905 * @return 0 if ok, -ve on error
907 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
908 struct fmap_entry *entry)
913 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
914 debug("Node '%s' has bad/missing 'reg' property\n", name);
915 return -FDT_ERR_NOTFOUND;
917 entry->offset = reg[0];
918 entry->length = reg[1];
919 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
920 prop = fdt_getprop(blob, node, "compress", NULL);
921 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
922 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
923 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
924 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
925 entry->hash = (uint8_t *)prop;
930 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
935 number = (number << 32) | fdt32_to_cpu(*ptr++);
940 int fdt_get_resource(const void *fdt, int node, const char *property,
941 unsigned int index, struct fdt_resource *res)
943 const fdt32_t *ptr, *end;
944 int na, ns, len, parent;
947 parent = fdt_parent_offset(fdt, node);
951 na = fdt_address_cells(fdt, parent);
952 ns = fdt_size_cells(fdt, parent);
954 ptr = fdt_getprop(fdt, node, property, &len);
958 end = ptr + len / sizeof(*ptr);
960 while (ptr + na + ns <= end) {
962 res->start = res->end = fdtdec_get_number(ptr, na);
963 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
971 return -FDT_ERR_NOTFOUND;
974 int fdt_get_named_resource(const void *fdt, int node, const char *property,
975 const char *prop_names, const char *name,
976 struct fdt_resource *res)
980 index = fdt_find_string(fdt, node, prop_names, name);
984 return fdt_get_resource(fdt, node, property, index, res);
987 int fdtdec_decode_memory_region(const void *blob, int config_node,
988 const char *mem_type, const char *suffix,
989 fdt_addr_t *basep, fdt_size_t *sizep)
993 fdt_size_t size, offset_size;
994 fdt_addr_t base, offset;
997 if (config_node == -1) {
998 config_node = fdt_path_offset(blob, "/config");
999 if (config_node < 0) {
1000 debug("%s: Cannot find /config node\n", __func__);
1007 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1009 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1011 debug("%s: No memory type for '%s', using /memory\n", __func__,
1016 node = fdt_path_offset(blob, mem);
1018 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1019 fdt_strerror(node));
1024 * Not strictly correct - the memory may have multiple banks. We just
1027 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1028 debug("%s: Failed to decode memory region %s\n", __func__,
1033 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1035 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1037 debug("%s: Failed to decode memory region '%s'\n", __func__,
1042 *basep = base + offset;
1043 *sizep = offset_size;
1048 static int decode_timing_property(const void *blob, int node, const char *name,
1049 struct timing_entry *result)
1051 int length, ret = 0;
1054 prop = fdt_getprop(blob, node, name, &length);
1056 debug("%s: could not find property %s\n",
1057 fdt_get_name(blob, node, NULL), name);
1061 if (length == sizeof(u32)) {
1062 result->typ = fdtdec_get_int(blob, node, name, 0);
1063 result->min = result->typ;
1064 result->max = result->typ;
1066 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1072 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1073 struct display_timing *dt)
1075 int i, node, timings_node;
1079 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1080 if (timings_node < 0)
1081 return timings_node;
1083 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1084 node > 0 && i != index;
1085 node = fdt_next_subnode(blob, node))
1091 memset(dt, 0, sizeof(*dt));
1093 ret |= decode_timing_property(blob, node, "hback-porch",
1095 ret |= decode_timing_property(blob, node, "hfront-porch",
1097 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1098 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1099 ret |= decode_timing_property(blob, node, "vback-porch",
1101 ret |= decode_timing_property(blob, node, "vfront-porch",
1103 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1104 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1105 ret |= decode_timing_property(blob, node, "clock-frequency",
1109 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1111 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1112 DISPLAY_FLAGS_VSYNC_LOW;
1114 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1116 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1117 DISPLAY_FLAGS_HSYNC_LOW;
1119 val = fdtdec_get_int(blob, node, "de-active", -1);
1121 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1122 DISPLAY_FLAGS_DE_LOW;
1124 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1126 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1127 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1130 if (fdtdec_get_bool(blob, node, "interlaced"))
1131 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1132 if (fdtdec_get_bool(blob, node, "doublescan"))
1133 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1134 if (fdtdec_get_bool(blob, node, "doubleclk"))
1135 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1140 int fdtdec_setup(void)
1142 #if CONFIG_IS_ENABLED(OF_CONTROL)
1143 # ifdef CONFIG_OF_EMBED
1144 /* Get a pointer to the FDT */
1145 gd->fdt_blob = __dtb_dt_begin;
1146 # elif defined CONFIG_OF_SEPARATE
1147 # ifdef CONFIG_SPL_BUILD
1148 /* FDT is at end of BSS */
1149 gd->fdt_blob = (ulong *)&__bss_end;
1151 /* FDT is at end of image */
1152 gd->fdt_blob = (ulong *)&_end;
1154 # elif defined(CONFIG_OF_HOSTFILE)
1155 if (sandbox_read_fdt_from_file()) {
1156 puts("Failed to read control FDT\n");
1160 # ifndef CONFIG_SPL_BUILD
1161 /* Allow the early environment to override the fdt address */
1162 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1163 (uintptr_t)gd->fdt_blob);
1166 return fdtdec_prepare_fdt();
1169 #endif /* !USE_HOSTCC */