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"),
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(const void *blob, int node,
88 const char *prop_name, fdt_size_t *sizep)
90 const fdt32_t *ptr, *end;
91 int parent, na, ns, len;
94 debug("%s: %s: ", __func__, prop_name);
96 parent = fdt_parent_offset(blob, node);
98 debug("(no parent found)\n");
99 return FDT_ADDR_T_NONE;
102 na = fdt_address_cells(blob, parent);
103 ns = fdt_size_cells(blob, parent);
105 ptr = fdt_getprop(blob, node, prop_name, &len);
107 debug("(not found)\n");
108 return FDT_ADDR_T_NONE;
111 end = ptr + len / sizeof(*ptr);
113 if (ptr + na + ns > end) {
114 debug("(not enough data: expected %d bytes, got %d bytes)\n",
116 return FDT_ADDR_T_NONE;
119 addr = fdtdec_get_number(ptr, na);
122 *sizep = fdtdec_get_number(ptr + na, ns);
123 debug("addr=%pa, size=%pa\n", &addr, sizep);
125 debug("%pa\n", &addr);
131 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
132 const char *prop_name)
134 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
138 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
139 const char *prop_name, struct fdt_pci_addr *addr)
145 debug("%s: %s: ", __func__, prop_name);
148 * If we follow the pci bus bindings strictly, we should check
149 * the value of the node's parent node's #address-cells and
150 * #size-cells. They need to be 3 and 2 accordingly. However,
151 * for simplicity we skip the check here.
153 cell = fdt_getprop(blob, node, prop_name, &len);
157 if ((len % FDT_PCI_REG_SIZE) == 0) {
158 int num = len / FDT_PCI_REG_SIZE;
161 for (i = 0; i < num; i++) {
162 debug("pci address #%d: %08lx %08lx %08lx\n", i,
163 (ulong)fdt_addr_to_cpu(cell[0]),
164 (ulong)fdt_addr_to_cpu(cell[1]),
165 (ulong)fdt_addr_to_cpu(cell[2]));
166 if ((fdt_addr_to_cpu(*cell) & type) == type) {
167 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
168 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
169 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
172 cell += (FDT_PCI_ADDR_CELLS +
188 debug("(not found)\n");
192 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
194 const char *list, *end;
197 list = fdt_getprop(blob, node, "compatible", &len);
206 if (len >= strlen("pciVVVV,DDDD")) {
207 s = strstr(list, "pci");
210 * check if the string is something like pciVVVV,DDDD.RR
211 * or just pciVVVV,DDDD
213 if (s && s[7] == ',' &&
214 (s[12] == '.' || s[12] == 0)) {
216 *vendor = simple_strtol(s, NULL, 16);
219 *device = simple_strtol(s, NULL, 16);
231 int fdtdec_get_pci_bdf(const void *blob, int node,
232 struct fdt_pci_addr *addr, pci_dev_t *bdf)
234 u16 dt_vendor, dt_device, vendor, device;
237 /* get vendor id & device id from the compatible string */
238 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
242 /* extract the bdf from fdt_pci_addr */
243 *bdf = addr->phys_hi & 0xffff00;
245 /* read vendor id & device id based on bdf */
246 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
247 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
250 * Note there are two places in the device tree to fully describe
251 * a pci device: one is via compatible string with a format of
252 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
253 * the device node's reg address property. We read the vendor id
254 * and device id based on bdf and compare the values with the
255 * "VVVV,DDDD". If they are the same, then we are good to use bdf
256 * to read device's bar. But if they are different, we have to rely
257 * on the vendor id and device id extracted from the compatible
258 * string and locate the real bdf by pci_find_device(). This is
259 * because normally we may only know device's device number and
260 * function number when writing device tree. The bus number is
261 * dynamically assigned during the pci enumeration process.
263 if ((dt_vendor != vendor) || (dt_device != device)) {
264 *bdf = pci_find_device(dt_vendor, dt_device, 0);
272 int fdtdec_get_pci_bar32(const void *blob, int node,
273 struct fdt_pci_addr *addr, u32 *bar)
279 /* get pci devices's bdf */
280 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
284 /* extract the bar number from fdt_pci_addr */
285 barnum = addr->phys_hi & 0xff;
286 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
289 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
290 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
296 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
297 uint64_t default_val)
299 const uint64_t *cell64;
302 cell64 = fdt_getprop(blob, node, prop_name, &length);
303 if (!cell64 || length < sizeof(*cell64))
306 return fdt64_to_cpu(*cell64);
309 int fdtdec_get_is_enabled(const void *blob, int node)
314 * It should say "okay", so only allow that. Some fdts use "ok" but
315 * this is a bug. Please fix your device tree source file. See here
318 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
320 cell = fdt_getprop(blob, node, "status", NULL);
322 return 0 == strcmp(cell, "okay");
326 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
328 enum fdt_compat_id id;
330 /* Search our drivers */
331 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
332 if (0 == fdt_node_check_compatible(blob, node,
335 return COMPAT_UNKNOWN;
338 int fdtdec_next_compatible(const void *blob, int node,
339 enum fdt_compat_id id)
341 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
344 int fdtdec_next_compatible_subnode(const void *blob, int node,
345 enum fdt_compat_id id, int *depthp)
348 node = fdt_next_node(blob, node, depthp);
349 } while (*depthp > 1);
351 /* If this is a direct subnode, and compatible, return it */
352 if (*depthp == 1 && 0 == fdt_node_check_compatible(
353 blob, node, compat_names[id]))
356 return -FDT_ERR_NOTFOUND;
359 int fdtdec_next_alias(const void *blob, const char *name,
360 enum fdt_compat_id id, int *upto)
362 #define MAX_STR_LEN 20
363 char str[MAX_STR_LEN + 20];
366 /* snprintf() is not available */
367 assert(strlen(name) < MAX_STR_LEN);
368 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
369 node = fdt_path_offset(blob, str);
372 err = fdt_node_check_compatible(blob, node, compat_names[id]);
376 return -FDT_ERR_NOTFOUND;
381 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
382 enum fdt_compat_id id, int *node_list, int maxcount)
384 memset(node_list, '\0', sizeof(*node_list) * maxcount);
386 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
389 /* TODO: Can we tighten this code up a little? */
390 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
391 enum fdt_compat_id id, int *node_list, int maxcount)
393 int name_len = strlen(name);
401 /* find the alias node if present */
402 alias_node = fdt_path_offset(blob, "/aliases");
405 * start with nothing, and we can assume that the root node can't
408 memset(nodes, '\0', sizeof(nodes));
410 /* First find all the compatible nodes */
411 for (node = count = 0; node >= 0 && count < maxcount;) {
412 node = fdtdec_next_compatible(blob, node, id);
414 nodes[count++] = node;
417 debug("%s: warning: maxcount exceeded with alias '%s'\n",
420 /* Now find all the aliases */
421 for (offset = fdt_first_property_offset(blob, alias_node);
423 offset = fdt_next_property_offset(blob, offset)) {
424 const struct fdt_property *prop;
430 prop = fdt_get_property_by_offset(blob, offset, NULL);
431 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
432 if (prop->len && 0 == strncmp(path, name, name_len))
433 node = fdt_path_offset(blob, prop->data);
437 /* Get the alias number */
438 number = simple_strtoul(path + name_len, NULL, 10);
439 if (number < 0 || number >= maxcount) {
440 debug("%s: warning: alias '%s' is out of range\n",
445 /* Make sure the node we found is actually in our list! */
447 for (j = 0; j < count; j++)
448 if (nodes[j] == node) {
454 debug("%s: warning: alias '%s' points to a node "
455 "'%s' that is missing or is not compatible "
456 " with '%s'\n", __func__, path,
457 fdt_get_name(blob, node, NULL),
463 * Add this node to our list in the right place, and mark
466 if (fdtdec_get_is_enabled(blob, node)) {
467 if (node_list[number]) {
468 debug("%s: warning: alias '%s' requires that "
469 "a node be placed in the list in a "
470 "position which is already filled by "
471 "node '%s'\n", __func__, path,
472 fdt_get_name(blob, node, NULL));
475 node_list[number] = node;
476 if (number >= num_found)
477 num_found = number + 1;
482 /* Add any nodes not mentioned by an alias */
483 for (i = j = 0; i < maxcount; i++) {
485 for (; j < maxcount; j++)
487 fdtdec_get_is_enabled(blob, nodes[j]))
490 /* Have we run out of nodes to add? */
494 assert(!node_list[i]);
495 node_list[i] = nodes[j++];
504 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
507 int base_len = strlen(base);
508 const char *find_name;
513 find_name = fdt_get_name(blob, offset, &find_namelen);
514 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
516 aliases = fdt_path_offset(blob, "/aliases");
517 for (prop_offset = fdt_first_property_offset(blob, aliases);
519 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
525 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
526 debug(" - %s, %s\n", name, prop);
527 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
528 strncmp(name, base, base_len))
531 slash = strrchr(prop, '/');
532 if (strcmp(slash + 1, find_name))
534 val = trailing_strtol(name);
537 debug("Found seq %d\n", *seqp);
542 debug("Not found\n");
546 int fdtdec_get_chosen_node(const void *blob, const char *name)
553 return -FDT_ERR_NOTFOUND;
554 chosen_node = fdt_path_offset(blob, "/chosen");
555 prop = fdt_getprop(blob, chosen_node, name, &len);
557 return -FDT_ERR_NOTFOUND;
558 return fdt_path_offset(blob, prop);
561 int fdtdec_check_fdt(void)
564 * We must have an FDT, but we cannot panic() yet since the console
565 * is not ready. So for now, just assert(). Boards which need an early
566 * FDT (prior to console ready) will need to make their own
567 * arrangements and do their own checks.
569 assert(!fdtdec_prepare_fdt());
574 * This function is a little odd in that it accesses global data. At some
575 * point if the architecture board.c files merge this will make more sense.
576 * Even now, it is common code.
578 int fdtdec_prepare_fdt(void)
580 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
581 fdt_check_header(gd->fdt_blob)) {
582 #ifdef CONFIG_SPL_BUILD
583 puts("Missing DTB\n");
585 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");
588 printf("fdt_blob=%p\n", gd->fdt_blob);
589 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
599 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
604 debug("%s: %s\n", __func__, prop_name);
605 phandle = fdt_getprop(blob, node, prop_name, NULL);
607 return -FDT_ERR_NOTFOUND;
609 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
614 * Look up a property in a node and check that it has a minimum length.
616 * @param blob FDT blob
617 * @param node node to examine
618 * @param prop_name name of property to find
619 * @param min_len minimum property length in bytes
620 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
621 found, or -FDT_ERR_BADLAYOUT if not enough data
622 * @return pointer to cell, which is only valid if err == 0
624 static const void *get_prop_check_min_len(const void *blob, int node,
625 const char *prop_name, int min_len, int *err)
630 debug("%s: %s\n", __func__, prop_name);
631 cell = fdt_getprop(blob, node, prop_name, &len);
633 *err = -FDT_ERR_NOTFOUND;
634 else if (len < min_len)
635 *err = -FDT_ERR_BADLAYOUT;
641 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
642 u32 *array, int count)
647 debug("%s: %s\n", __func__, prop_name);
648 cell = get_prop_check_min_len(blob, node, prop_name,
649 sizeof(u32) * count, &err);
651 for (i = 0; i < count; i++)
652 array[i] = fdt32_to_cpu(cell[i]);
657 int fdtdec_get_int_array_count(const void *blob, int node,
658 const char *prop_name, u32 *array, int count)
664 debug("%s: %s\n", __func__, prop_name);
665 cell = fdt_getprop(blob, node, prop_name, &len);
667 return -FDT_ERR_NOTFOUND;
668 elems = len / sizeof(u32);
671 for (i = 0; i < count; i++)
672 array[i] = fdt32_to_cpu(cell[i]);
677 const u32 *fdtdec_locate_array(const void *blob, int node,
678 const char *prop_name, int count)
683 cell = get_prop_check_min_len(blob, node, prop_name,
684 sizeof(u32) * count, &err);
685 return err ? NULL : cell;
688 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
693 debug("%s: %s\n", __func__, prop_name);
694 cell = fdt_getprop(blob, node, prop_name, &len);
698 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
699 const char *list_name,
700 const char *cells_name,
701 int cell_count, int index,
702 struct fdtdec_phandle_args *out_args)
704 const __be32 *list, *list_end;
705 int rc = 0, size, cur_index = 0;
710 /* Retrieve the phandle list property */
711 list = fdt_getprop(blob, src_node, list_name, &size);
714 list_end = list + size / sizeof(*list);
716 /* Loop over the phandles until all the requested entry is found */
717 while (list < list_end) {
722 * If phandle is 0, then it is an empty entry with no
723 * arguments. Skip forward to the next entry.
725 phandle = be32_to_cpup(list++);
728 * Find the provider node and parse the #*-cells
729 * property to determine the argument length.
731 * This is not needed if the cell count is hard-coded
732 * (i.e. cells_name not set, but cell_count is set),
733 * except when we're going to return the found node
736 if (cells_name || cur_index == index) {
737 node = fdt_node_offset_by_phandle(blob,
740 debug("%s: could not find phandle\n",
741 fdt_get_name(blob, src_node,
748 count = fdtdec_get_int(blob, node, cells_name,
751 debug("%s: could not get %s for %s\n",
752 fdt_get_name(blob, src_node,
755 fdt_get_name(blob, node,
764 * Make sure that the arguments actually fit in the
765 * remaining property data length
767 if (list + count > list_end) {
768 debug("%s: arguments longer than property\n",
769 fdt_get_name(blob, src_node, NULL));
775 * All of the error cases above bail out of the loop, so at
776 * this point, the parsing is successful. If the requested
777 * index matches, then fill the out_args structure and return,
778 * or return -ENOENT for an empty entry.
781 if (cur_index == index) {
788 if (count > MAX_PHANDLE_ARGS) {
789 debug("%s: too many arguments %d\n",
790 fdt_get_name(blob, src_node,
792 count = MAX_PHANDLE_ARGS;
794 out_args->node = node;
795 out_args->args_count = count;
796 for (i = 0; i < count; i++) {
798 be32_to_cpup(list++);
802 /* Found it! return success */
812 * Result will be one of:
813 * -ENOENT : index is for empty phandle
814 * -EINVAL : parsing error on data
815 * [1..n] : Number of phandle (count mode; when index = -1)
817 rc = index < 0 ? cur_index : -ENOENT;
822 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
823 u8 *array, int count)
828 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
830 memcpy(array, cell, count);
834 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
835 const char *prop_name, int count)
840 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
846 int fdtdec_get_config_int(const void *blob, const char *prop_name,
851 debug("%s: %s\n", __func__, prop_name);
852 config_node = fdt_path_offset(blob, "/config");
855 return fdtdec_get_int(blob, config_node, prop_name, default_val);
858 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
863 debug("%s: %s\n", __func__, prop_name);
864 config_node = fdt_path_offset(blob, "/config");
867 prop = fdt_get_property(blob, config_node, prop_name, NULL);
872 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
878 debug("%s: %s\n", __func__, prop_name);
879 nodeoffset = fdt_path_offset(blob, "/config");
883 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
887 return (char *)nodep;
890 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
891 fdt_addr_t *basep, fdt_size_t *sizep)
893 const fdt_addr_t *cell;
896 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
898 cell = fdt_getprop(blob, node, prop_name, &len);
899 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
900 debug("cell=%p, len=%d\n", cell, len);
904 *basep = fdt_addr_to_cpu(*cell);
905 *sizep = fdt_size_to_cpu(cell[1]);
906 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
913 * Read a flash entry from the fdt
915 * @param blob FDT blob
916 * @param node Offset of node to read
917 * @param name Name of node being read
918 * @param entry Place to put offset and size of this node
919 * @return 0 if ok, -ve on error
921 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
922 struct fmap_entry *entry)
927 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
928 debug("Node '%s' has bad/missing 'reg' property\n", name);
929 return -FDT_ERR_NOTFOUND;
931 entry->offset = reg[0];
932 entry->length = reg[1];
933 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
934 prop = fdt_getprop(blob, node, "compress", NULL);
935 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
936 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
937 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
938 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
939 entry->hash = (uint8_t *)prop;
944 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
949 number = (number << 32) | fdt32_to_cpu(*ptr++);
954 int fdt_get_resource(const void *fdt, int node, const char *property,
955 unsigned int index, struct fdt_resource *res)
957 const fdt32_t *ptr, *end;
958 int na, ns, len, parent;
961 parent = fdt_parent_offset(fdt, node);
965 na = fdt_address_cells(fdt, parent);
966 ns = fdt_size_cells(fdt, parent);
968 ptr = fdt_getprop(fdt, node, property, &len);
972 end = ptr + len / sizeof(*ptr);
974 while (ptr + na + ns <= end) {
976 res->start = res->end = fdtdec_get_number(ptr, na);
977 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
985 return -FDT_ERR_NOTFOUND;
988 int fdt_get_named_resource(const void *fdt, int node, const char *property,
989 const char *prop_names, const char *name,
990 struct fdt_resource *res)
994 index = fdt_find_string(fdt, node, prop_names, name);
998 return fdt_get_resource(fdt, node, property, index, res);
1001 int fdtdec_decode_memory_region(const void *blob, int config_node,
1002 const char *mem_type, const char *suffix,
1003 fdt_addr_t *basep, fdt_size_t *sizep)
1007 fdt_size_t size, offset_size;
1008 fdt_addr_t base, offset;
1011 if (config_node == -1) {
1012 config_node = fdt_path_offset(blob, "/config");
1013 if (config_node < 0) {
1014 debug("%s: Cannot find /config node\n", __func__);
1021 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1023 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1025 debug("%s: No memory type for '%s', using /memory\n", __func__,
1030 node = fdt_path_offset(blob, mem);
1032 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1033 fdt_strerror(node));
1038 * Not strictly correct - the memory may have multiple banks. We just
1041 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1042 debug("%s: Failed to decode memory region %s\n", __func__,
1047 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1049 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1051 debug("%s: Failed to decode memory region '%s'\n", __func__,
1056 *basep = base + offset;
1057 *sizep = offset_size;
1062 static int decode_timing_property(const void *blob, int node, const char *name,
1063 struct timing_entry *result)
1065 int length, ret = 0;
1068 prop = fdt_getprop(blob, node, name, &length);
1070 debug("%s: could not find property %s\n",
1071 fdt_get_name(blob, node, NULL), name);
1075 if (length == sizeof(u32)) {
1076 result->typ = fdtdec_get_int(blob, node, name, 0);
1077 result->min = result->typ;
1078 result->max = result->typ;
1080 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1086 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1087 struct display_timing *dt)
1089 int i, node, timings_node;
1093 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1094 if (timings_node < 0)
1095 return timings_node;
1097 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1098 node > 0 && i != index;
1099 node = fdt_next_subnode(blob, node))
1105 memset(dt, 0, sizeof(*dt));
1107 ret |= decode_timing_property(blob, node, "hback-porch",
1109 ret |= decode_timing_property(blob, node, "hfront-porch",
1111 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1112 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1113 ret |= decode_timing_property(blob, node, "vback-porch",
1115 ret |= decode_timing_property(blob, node, "vfront-porch",
1117 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1118 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1119 ret |= decode_timing_property(blob, node, "clock-frequency",
1123 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1125 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1126 DISPLAY_FLAGS_VSYNC_LOW;
1128 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1130 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1131 DISPLAY_FLAGS_HSYNC_LOW;
1133 val = fdtdec_get_int(blob, node, "de-active", -1);
1135 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1136 DISPLAY_FLAGS_DE_LOW;
1138 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1140 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1141 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1144 if (fdtdec_get_bool(blob, node, "interlaced"))
1145 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1146 if (fdtdec_get_bool(blob, node, "doublescan"))
1147 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1148 if (fdtdec_get_bool(blob, node, "doubleclk"))
1149 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1154 int fdtdec_setup(void)
1156 #ifdef CONFIG_OF_CONTROL
1157 # ifdef CONFIG_OF_EMBED
1158 /* Get a pointer to the FDT */
1159 gd->fdt_blob = __dtb_dt_begin;
1160 # elif defined CONFIG_OF_SEPARATE
1161 # ifdef CONFIG_SPL_BUILD
1162 /* FDT is at end of BSS */
1163 gd->fdt_blob = (ulong *)&__bss_end;
1165 /* FDT is at end of image */
1166 gd->fdt_blob = (ulong *)&_end;
1168 # elif defined(CONFIG_OF_HOSTFILE)
1169 if (sandbox_read_fdt_from_file()) {
1170 puts("Failed to read control FDT\n");
1174 # ifndef CONFIG_SPL_BUILD
1175 /* Allow the early environment to override the fdt address */
1176 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1177 (uintptr_t)gd->fdt_blob);
1180 return fdtdec_prepare_fdt();
1183 #endif /* !USE_HOSTCC */