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(COMPAT_NXP_PTN3460, "nxp,ptn3460"),
66 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
67 COMPAT(PARADE_PS8625, "parade,ps8625"),
68 COMPAT(INTEL_MICROCODE, "intel,microcode"),
69 COMPAT(MEMORY_SPD, "memory-spd"),
70 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
71 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
72 COMPAT(INTEL_GMA, "intel,gma"),
73 COMPAT(AMS_AS3722, "ams,as3722"),
74 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
75 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
76 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"),
77 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
78 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
79 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
82 const char *fdtdec_get_compatible(enum fdt_compat_id id)
84 /* We allow reading of the 'unknown' ID for testing purposes */
85 assert(id >= 0 && id < COMPAT_COUNT);
86 return compat_names[id];
89 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
90 const char *prop_name, fdt_size_t *sizep)
92 const fdt32_t *ptr, *end;
93 int parent, na, ns, len;
96 debug("%s: %s: ", __func__, prop_name);
98 parent = fdt_parent_offset(blob, node);
100 debug("(no parent found)\n");
101 return FDT_ADDR_T_NONE;
104 na = fdt_address_cells(blob, parent);
105 ns = fdt_size_cells(blob, parent);
107 ptr = fdt_getprop(blob, node, prop_name, &len);
109 debug("(not found)\n");
110 return FDT_ADDR_T_NONE;
113 end = ptr + len / sizeof(*ptr);
115 if (ptr + na + ns > end) {
116 debug("(not enough data: expected %d bytes, got %d bytes)\n",
118 return FDT_ADDR_T_NONE;
121 addr = fdtdec_get_number(ptr, na);
124 *sizep = fdtdec_get_number(ptr + na, ns);
125 debug("addr=%pa, size=%pa\n", &addr, sizep);
127 debug("%pa\n", &addr);
133 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
134 const char *prop_name)
136 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
140 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
141 const char *prop_name, struct fdt_pci_addr *addr)
147 debug("%s: %s: ", __func__, prop_name);
150 * If we follow the pci bus bindings strictly, we should check
151 * the value of the node's parent node's #address-cells and
152 * #size-cells. They need to be 3 and 2 accordingly. However,
153 * for simplicity we skip the check here.
155 cell = fdt_getprop(blob, node, prop_name, &len);
159 if ((len % FDT_PCI_REG_SIZE) == 0) {
160 int num = len / FDT_PCI_REG_SIZE;
163 for (i = 0; i < num; i++) {
164 debug("pci address #%d: %08lx %08lx %08lx\n", i,
165 (ulong)fdt_addr_to_cpu(cell[0]),
166 (ulong)fdt_addr_to_cpu(cell[1]),
167 (ulong)fdt_addr_to_cpu(cell[2]));
168 if ((fdt_addr_to_cpu(*cell) & type) == type) {
169 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
170 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
171 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
174 cell += (FDT_PCI_ADDR_CELLS +
190 debug("(not found)\n");
194 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
196 const char *list, *end;
199 list = fdt_getprop(blob, node, "compatible", &len);
208 if (len >= strlen("pciVVVV,DDDD")) {
209 s = strstr(list, "pci");
212 * check if the string is something like pciVVVV,DDDD.RR
213 * or just pciVVVV,DDDD
215 if (s && s[7] == ',' &&
216 (s[12] == '.' || s[12] == 0)) {
218 *vendor = simple_strtol(s, NULL, 16);
221 *device = simple_strtol(s, NULL, 16);
233 int fdtdec_get_pci_bdf(const void *blob, int node,
234 struct fdt_pci_addr *addr, pci_dev_t *bdf)
236 u16 dt_vendor, dt_device, vendor, device;
239 /* get vendor id & device id from the compatible string */
240 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
244 /* extract the bdf from fdt_pci_addr */
245 *bdf = addr->phys_hi & 0xffff00;
247 /* read vendor id & device id based on bdf */
248 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
249 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
252 * Note there are two places in the device tree to fully describe
253 * a pci device: one is via compatible string with a format of
254 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
255 * the device node's reg address property. We read the vendor id
256 * and device id based on bdf and compare the values with the
257 * "VVVV,DDDD". If they are the same, then we are good to use bdf
258 * to read device's bar. But if they are different, we have to rely
259 * on the vendor id and device id extracted from the compatible
260 * string and locate the real bdf by pci_find_device(). This is
261 * because normally we may only know device's device number and
262 * function number when writing device tree. The bus number is
263 * dynamically assigned during the pci enumeration process.
265 if ((dt_vendor != vendor) || (dt_device != device)) {
266 *bdf = pci_find_device(dt_vendor, dt_device, 0);
274 int fdtdec_get_pci_bar32(const void *blob, int node,
275 struct fdt_pci_addr *addr, u32 *bar)
281 /* get pci devices's bdf */
282 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
286 /* extract the bar number from fdt_pci_addr */
287 barnum = addr->phys_hi & 0xff;
288 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
291 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
292 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
298 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
299 uint64_t default_val)
301 const uint64_t *cell64;
304 cell64 = fdt_getprop(blob, node, prop_name, &length);
305 if (!cell64 || length < sizeof(*cell64))
308 return fdt64_to_cpu(*cell64);
311 int fdtdec_get_is_enabled(const void *blob, int node)
316 * It should say "okay", so only allow that. Some fdts use "ok" but
317 * this is a bug. Please fix your device tree source file. See here
320 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
322 cell = fdt_getprop(blob, node, "status", NULL);
324 return 0 == strcmp(cell, "okay");
328 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
330 enum fdt_compat_id id;
332 /* Search our drivers */
333 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
334 if (0 == fdt_node_check_compatible(blob, node,
337 return COMPAT_UNKNOWN;
340 int fdtdec_next_compatible(const void *blob, int node,
341 enum fdt_compat_id id)
343 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
346 int fdtdec_next_compatible_subnode(const void *blob, int node,
347 enum fdt_compat_id id, int *depthp)
350 node = fdt_next_node(blob, node, depthp);
351 } while (*depthp > 1);
353 /* If this is a direct subnode, and compatible, return it */
354 if (*depthp == 1 && 0 == fdt_node_check_compatible(
355 blob, node, compat_names[id]))
358 return -FDT_ERR_NOTFOUND;
361 int fdtdec_next_alias(const void *blob, const char *name,
362 enum fdt_compat_id id, int *upto)
364 #define MAX_STR_LEN 20
365 char str[MAX_STR_LEN + 20];
368 /* snprintf() is not available */
369 assert(strlen(name) < MAX_STR_LEN);
370 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
371 node = fdt_path_offset(blob, str);
374 err = fdt_node_check_compatible(blob, node, compat_names[id]);
378 return -FDT_ERR_NOTFOUND;
383 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
384 enum fdt_compat_id id, int *node_list, int maxcount)
386 memset(node_list, '\0', sizeof(*node_list) * maxcount);
388 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
391 /* TODO: Can we tighten this code up a little? */
392 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
393 enum fdt_compat_id id, int *node_list, int maxcount)
395 int name_len = strlen(name);
403 /* find the alias node if present */
404 alias_node = fdt_path_offset(blob, "/aliases");
407 * start with nothing, and we can assume that the root node can't
410 memset(nodes, '\0', sizeof(nodes));
412 /* First find all the compatible nodes */
413 for (node = count = 0; node >= 0 && count < maxcount;) {
414 node = fdtdec_next_compatible(blob, node, id);
416 nodes[count++] = node;
419 debug("%s: warning: maxcount exceeded with alias '%s'\n",
422 /* Now find all the aliases */
423 for (offset = fdt_first_property_offset(blob, alias_node);
425 offset = fdt_next_property_offset(blob, offset)) {
426 const struct fdt_property *prop;
432 prop = fdt_get_property_by_offset(blob, offset, NULL);
433 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
434 if (prop->len && 0 == strncmp(path, name, name_len))
435 node = fdt_path_offset(blob, prop->data);
439 /* Get the alias number */
440 number = simple_strtoul(path + name_len, NULL, 10);
441 if (number < 0 || number >= maxcount) {
442 debug("%s: warning: alias '%s' is out of range\n",
447 /* Make sure the node we found is actually in our list! */
449 for (j = 0; j < count; j++)
450 if (nodes[j] == node) {
456 debug("%s: warning: alias '%s' points to a node "
457 "'%s' that is missing or is not compatible "
458 " with '%s'\n", __func__, path,
459 fdt_get_name(blob, node, NULL),
465 * Add this node to our list in the right place, and mark
468 if (fdtdec_get_is_enabled(blob, node)) {
469 if (node_list[number]) {
470 debug("%s: warning: alias '%s' requires that "
471 "a node be placed in the list in a "
472 "position which is already filled by "
473 "node '%s'\n", __func__, path,
474 fdt_get_name(blob, node, NULL));
477 node_list[number] = node;
478 if (number >= num_found)
479 num_found = number + 1;
484 /* Add any nodes not mentioned by an alias */
485 for (i = j = 0; i < maxcount; i++) {
487 for (; j < maxcount; j++)
489 fdtdec_get_is_enabled(blob, nodes[j]))
492 /* Have we run out of nodes to add? */
496 assert(!node_list[i]);
497 node_list[i] = nodes[j++];
506 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
509 int base_len = strlen(base);
510 const char *find_name;
515 find_name = fdt_get_name(blob, offset, &find_namelen);
516 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
518 aliases = fdt_path_offset(blob, "/aliases");
519 for (prop_offset = fdt_first_property_offset(blob, aliases);
521 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
527 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
528 debug(" - %s, %s\n", name, prop);
529 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
530 strncmp(name, base, base_len))
533 slash = strrchr(prop, '/');
534 if (strcmp(slash + 1, find_name))
536 val = trailing_strtol(name);
539 debug("Found seq %d\n", *seqp);
544 debug("Not found\n");
548 int fdtdec_get_chosen_node(const void *blob, const char *name)
555 return -FDT_ERR_NOTFOUND;
556 chosen_node = fdt_path_offset(blob, "/chosen");
557 prop = fdt_getprop(blob, chosen_node, name, &len);
559 return -FDT_ERR_NOTFOUND;
560 return fdt_path_offset(blob, prop);
563 int fdtdec_check_fdt(void)
566 * We must have an FDT, but we cannot panic() yet since the console
567 * is not ready. So for now, just assert(). Boards which need an early
568 * FDT (prior to console ready) will need to make their own
569 * arrangements and do their own checks.
571 assert(!fdtdec_prepare_fdt());
576 * This function is a little odd in that it accesses global data. At some
577 * point if the architecture board.c files merge this will make more sense.
578 * Even now, it is common code.
580 int fdtdec_prepare_fdt(void)
582 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
583 fdt_check_header(gd->fdt_blob)) {
584 #ifdef CONFIG_SPL_BUILD
585 puts("Missing DTB\n");
587 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");
590 printf("fdt_blob=%p\n", gd->fdt_blob);
591 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
601 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
606 debug("%s: %s\n", __func__, prop_name);
607 phandle = fdt_getprop(blob, node, prop_name, NULL);
609 return -FDT_ERR_NOTFOUND;
611 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
616 * Look up a property in a node and check that it has a minimum length.
618 * @param blob FDT blob
619 * @param node node to examine
620 * @param prop_name name of property to find
621 * @param min_len minimum property length in bytes
622 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
623 found, or -FDT_ERR_BADLAYOUT if not enough data
624 * @return pointer to cell, which is only valid if err == 0
626 static const void *get_prop_check_min_len(const void *blob, int node,
627 const char *prop_name, int min_len, int *err)
632 debug("%s: %s\n", __func__, prop_name);
633 cell = fdt_getprop(blob, node, prop_name, &len);
635 *err = -FDT_ERR_NOTFOUND;
636 else if (len < min_len)
637 *err = -FDT_ERR_BADLAYOUT;
643 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
644 u32 *array, int count)
649 debug("%s: %s\n", __func__, prop_name);
650 cell = get_prop_check_min_len(blob, node, prop_name,
651 sizeof(u32) * count, &err);
653 for (i = 0; i < count; i++)
654 array[i] = fdt32_to_cpu(cell[i]);
659 int fdtdec_get_int_array_count(const void *blob, int node,
660 const char *prop_name, u32 *array, int count)
666 debug("%s: %s\n", __func__, prop_name);
667 cell = fdt_getprop(blob, node, prop_name, &len);
669 return -FDT_ERR_NOTFOUND;
670 elems = len / sizeof(u32);
673 for (i = 0; i < count; i++)
674 array[i] = fdt32_to_cpu(cell[i]);
679 const u32 *fdtdec_locate_array(const void *blob, int node,
680 const char *prop_name, int count)
685 cell = get_prop_check_min_len(blob, node, prop_name,
686 sizeof(u32) * count, &err);
687 return err ? NULL : cell;
690 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
695 debug("%s: %s\n", __func__, prop_name);
696 cell = fdt_getprop(blob, node, prop_name, &len);
700 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
701 const char *list_name,
702 const char *cells_name,
703 int cell_count, int index,
704 struct fdtdec_phandle_args *out_args)
706 const __be32 *list, *list_end;
707 int rc = 0, size, cur_index = 0;
712 /* Retrieve the phandle list property */
713 list = fdt_getprop(blob, src_node, list_name, &size);
716 list_end = list + size / sizeof(*list);
718 /* Loop over the phandles until all the requested entry is found */
719 while (list < list_end) {
724 * If phandle is 0, then it is an empty entry with no
725 * arguments. Skip forward to the next entry.
727 phandle = be32_to_cpup(list++);
730 * Find the provider node and parse the #*-cells
731 * property to determine the argument length.
733 * This is not needed if the cell count is hard-coded
734 * (i.e. cells_name not set, but cell_count is set),
735 * except when we're going to return the found node
738 if (cells_name || cur_index == index) {
739 node = fdt_node_offset_by_phandle(blob,
742 debug("%s: could not find phandle\n",
743 fdt_get_name(blob, src_node,
750 count = fdtdec_get_int(blob, node, cells_name,
753 debug("%s: could not get %s for %s\n",
754 fdt_get_name(blob, src_node,
757 fdt_get_name(blob, node,
766 * Make sure that the arguments actually fit in the
767 * remaining property data length
769 if (list + count > list_end) {
770 debug("%s: arguments longer than property\n",
771 fdt_get_name(blob, src_node, NULL));
777 * All of the error cases above bail out of the loop, so at
778 * this point, the parsing is successful. If the requested
779 * index matches, then fill the out_args structure and return,
780 * or return -ENOENT for an empty entry.
783 if (cur_index == index) {
790 if (count > MAX_PHANDLE_ARGS) {
791 debug("%s: too many arguments %d\n",
792 fdt_get_name(blob, src_node,
794 count = MAX_PHANDLE_ARGS;
796 out_args->node = node;
797 out_args->args_count = count;
798 for (i = 0; i < count; i++) {
800 be32_to_cpup(list++);
804 /* Found it! return success */
814 * Result will be one of:
815 * -ENOENT : index is for empty phandle
816 * -EINVAL : parsing error on data
817 * [1..n] : Number of phandle (count mode; when index = -1)
819 rc = index < 0 ? cur_index : -ENOENT;
824 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
825 u8 *array, int count)
830 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
832 memcpy(array, cell, count);
836 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
837 const char *prop_name, int count)
842 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
848 int fdtdec_get_config_int(const void *blob, const char *prop_name,
853 debug("%s: %s\n", __func__, prop_name);
854 config_node = fdt_path_offset(blob, "/config");
857 return fdtdec_get_int(blob, config_node, prop_name, default_val);
860 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
865 debug("%s: %s\n", __func__, prop_name);
866 config_node = fdt_path_offset(blob, "/config");
869 prop = fdt_get_property(blob, config_node, prop_name, NULL);
874 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
880 debug("%s: %s\n", __func__, prop_name);
881 nodeoffset = fdt_path_offset(blob, "/config");
885 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
889 return (char *)nodep;
892 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
893 fdt_addr_t *basep, fdt_size_t *sizep)
895 const fdt_addr_t *cell;
898 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
900 cell = fdt_getprop(blob, node, prop_name, &len);
901 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
902 debug("cell=%p, len=%d\n", cell, len);
906 *basep = fdt_addr_to_cpu(*cell);
907 *sizep = fdt_size_to_cpu(cell[1]);
908 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
915 * Read a flash entry from the fdt
917 * @param blob FDT blob
918 * @param node Offset of node to read
919 * @param name Name of node being read
920 * @param entry Place to put offset and size of this node
921 * @return 0 if ok, -ve on error
923 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
924 struct fmap_entry *entry)
929 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
930 debug("Node '%s' has bad/missing 'reg' property\n", name);
931 return -FDT_ERR_NOTFOUND;
933 entry->offset = reg[0];
934 entry->length = reg[1];
935 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
936 prop = fdt_getprop(blob, node, "compress", NULL);
937 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
938 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
939 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
940 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
941 entry->hash = (uint8_t *)prop;
946 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
951 number = (number << 32) | fdt32_to_cpu(*ptr++);
956 int fdt_get_resource(const void *fdt, int node, const char *property,
957 unsigned int index, struct fdt_resource *res)
959 const fdt32_t *ptr, *end;
960 int na, ns, len, parent;
963 parent = fdt_parent_offset(fdt, node);
967 na = fdt_address_cells(fdt, parent);
968 ns = fdt_size_cells(fdt, parent);
970 ptr = fdt_getprop(fdt, node, property, &len);
974 end = ptr + len / sizeof(*ptr);
976 while (ptr + na + ns <= end) {
978 res->start = res->end = fdtdec_get_number(ptr, na);
979 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
987 return -FDT_ERR_NOTFOUND;
990 int fdt_get_named_resource(const void *fdt, int node, const char *property,
991 const char *prop_names, const char *name,
992 struct fdt_resource *res)
996 index = fdt_find_string(fdt, node, prop_names, name);
1000 return fdt_get_resource(fdt, node, property, index, res);
1003 int fdtdec_decode_memory_region(const void *blob, int config_node,
1004 const char *mem_type, const char *suffix,
1005 fdt_addr_t *basep, fdt_size_t *sizep)
1009 fdt_size_t size, offset_size;
1010 fdt_addr_t base, offset;
1013 if (config_node == -1) {
1014 config_node = fdt_path_offset(blob, "/config");
1015 if (config_node < 0) {
1016 debug("%s: Cannot find /config node\n", __func__);
1023 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1025 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1027 debug("%s: No memory type for '%s', using /memory\n", __func__,
1032 node = fdt_path_offset(blob, mem);
1034 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1035 fdt_strerror(node));
1040 * Not strictly correct - the memory may have multiple banks. We just
1043 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1044 debug("%s: Failed to decode memory region %s\n", __func__,
1049 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1051 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1053 debug("%s: Failed to decode memory region '%s'\n", __func__,
1058 *basep = base + offset;
1059 *sizep = offset_size;
1064 static int decode_timing_property(const void *blob, int node, const char *name,
1065 struct timing_entry *result)
1067 int length, ret = 0;
1070 prop = fdt_getprop(blob, node, name, &length);
1072 debug("%s: could not find property %s\n",
1073 fdt_get_name(blob, node, NULL), name);
1077 if (length == sizeof(u32)) {
1078 result->typ = fdtdec_get_int(blob, node, name, 0);
1079 result->min = result->typ;
1080 result->max = result->typ;
1082 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1088 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1089 struct display_timing *dt)
1091 int i, node, timings_node;
1095 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1096 if (timings_node < 0)
1097 return timings_node;
1099 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1100 node > 0 && i != index;
1101 node = fdt_next_subnode(blob, node))
1107 memset(dt, 0, sizeof(*dt));
1109 ret |= decode_timing_property(blob, node, "hback-porch",
1111 ret |= decode_timing_property(blob, node, "hfront-porch",
1113 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1114 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1115 ret |= decode_timing_property(blob, node, "vback-porch",
1117 ret |= decode_timing_property(blob, node, "vfront-porch",
1119 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1120 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1121 ret |= decode_timing_property(blob, node, "clock-frequency",
1125 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1127 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1128 DISPLAY_FLAGS_VSYNC_LOW;
1130 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1132 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1133 DISPLAY_FLAGS_HSYNC_LOW;
1135 val = fdtdec_get_int(blob, node, "de-active", -1);
1137 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1138 DISPLAY_FLAGS_DE_LOW;
1140 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1142 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1143 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1146 if (fdtdec_get_bool(blob, node, "interlaced"))
1147 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1148 if (fdtdec_get_bool(blob, node, "doublescan"))
1149 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1150 if (fdtdec_get_bool(blob, node, "doubleclk"))
1151 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1156 int fdtdec_setup(void)
1158 #ifdef CONFIG_OF_CONTROL
1159 # ifdef CONFIG_OF_EMBED
1160 /* Get a pointer to the FDT */
1161 gd->fdt_blob = __dtb_dt_begin;
1162 # elif defined CONFIG_OF_SEPARATE
1163 # ifdef CONFIG_SPL_BUILD
1164 /* FDT is at end of BSS */
1165 gd->fdt_blob = (ulong *)&__bss_end;
1167 /* FDT is at end of image */
1168 gd->fdt_blob = (ulong *)&_end;
1170 # elif defined(CONFIG_OF_HOSTFILE)
1171 if (sandbox_read_fdt_from_file()) {
1172 puts("Failed to read control FDT\n");
1176 # ifndef CONFIG_SPL_BUILD
1177 /* Allow the early environment to override the fdt address */
1178 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1179 (uintptr_t)gd->fdt_blob);
1182 return fdtdec_prepare_fdt();
1185 #endif /* !USE_HOSTCC */