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_USB, "nvidia,tegra20-ehci"),
26 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
27 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
28 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
29 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
30 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
31 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
32 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
33 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"),
34 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"),
35 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
36 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
37 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
38 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
39 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
40 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"),
41 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"),
42 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"),
43 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
44 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
45 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
46 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
47 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
48 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
49 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
50 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
51 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
52 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
53 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
54 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
55 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
56 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
57 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
58 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
59 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
60 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
61 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
62 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
63 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645tt"),
64 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
65 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
66 COMPAT(TI_TPS65090, "ti,tps65090"),
67 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"),
68 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
69 COMPAT(PARADE_PS8625, "parade,ps8625"),
70 COMPAT(INTEL_MICROCODE, "intel,microcode"),
71 COMPAT(MEMORY_SPD, "memory-spd"),
72 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
73 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
74 COMPAT(INTEL_GMA, "intel,gma"),
75 COMPAT(AMS_AS3722, "ams,as3722"),
76 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
77 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
78 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"),
79 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
80 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
81 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
84 const char *fdtdec_get_compatible(enum fdt_compat_id id)
86 /* We allow reading of the 'unknown' ID for testing purposes */
87 assert(id >= 0 && id < COMPAT_COUNT);
88 return compat_names[id];
91 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
92 const char *prop_name, fdt_size_t *sizep)
94 const fdt_addr_t *cell;
97 debug("%s: %s: ", __func__, prop_name);
98 cell = fdt_getprop(blob, node, prop_name, &len);
99 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
100 len == sizeof(fdt_addr_t) * 2)) {
101 fdt_addr_t addr = fdt_addr_to_cpu(*cell);
103 const fdt_size_t *size;
105 size = (fdt_size_t *)((char *)cell +
107 *sizep = fdt_size_to_cpu(*size);
108 debug("addr=%08lx, size=%08x\n",
109 (ulong)addr, *sizep);
111 debug("%08lx\n", (ulong)addr);
115 debug("(not found)\n");
116 return FDT_ADDR_T_NONE;
119 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
120 const char *prop_name)
122 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
126 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
127 const char *prop_name, struct fdt_pci_addr *addr)
133 debug("%s: %s: ", __func__, prop_name);
136 * If we follow the pci bus bindings strictly, we should check
137 * the value of the node's parent node's #address-cells and
138 * #size-cells. They need to be 3 and 2 accordingly. However,
139 * for simplicity we skip the check here.
141 cell = fdt_getprop(blob, node, prop_name, &len);
145 if ((len % FDT_PCI_REG_SIZE) == 0) {
146 int num = len / FDT_PCI_REG_SIZE;
149 for (i = 0; i < num; i++) {
150 debug("pci address #%d: %08lx %08lx %08lx\n", i,
151 (ulong)fdt_addr_to_cpu(cell[0]),
152 (ulong)fdt_addr_to_cpu(cell[1]),
153 (ulong)fdt_addr_to_cpu(cell[2]));
154 if ((fdt_addr_to_cpu(*cell) & type) == type) {
155 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
156 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
157 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
160 cell += (FDT_PCI_ADDR_CELLS +
176 debug("(not found)\n");
180 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
182 const char *list, *end;
185 list = fdt_getprop(blob, node, "compatible", &len);
194 if (len >= strlen("pciVVVV,DDDD")) {
195 s = strstr(list, "pci");
198 * check if the string is something like pciVVVV,DDDD.RR
199 * or just pciVVVV,DDDD
201 if (s && s[7] == ',' &&
202 (s[12] == '.' || s[12] == 0)) {
204 *vendor = simple_strtol(s, NULL, 16);
207 *device = simple_strtol(s, NULL, 16);
219 int fdtdec_get_pci_bdf(const void *blob, int node,
220 struct fdt_pci_addr *addr, pci_dev_t *bdf)
222 u16 dt_vendor, dt_device, vendor, device;
225 /* get vendor id & device id from the compatible string */
226 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
230 /* extract the bdf from fdt_pci_addr */
231 *bdf = addr->phys_hi & 0xffff00;
233 /* read vendor id & device id based on bdf */
234 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
235 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
238 * Note there are two places in the device tree to fully describe
239 * a pci device: one is via compatible string with a format of
240 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
241 * the device node's reg address property. We read the vendor id
242 * and device id based on bdf and compare the values with the
243 * "VVVV,DDDD". If they are the same, then we are good to use bdf
244 * to read device's bar. But if they are different, we have to rely
245 * on the vendor id and device id extracted from the compatible
246 * string and locate the real bdf by pci_find_device(). This is
247 * because normally we may only know device's device number and
248 * function number when writing device tree. The bus number is
249 * dynamically assigned during the pci enumeration process.
251 if ((dt_vendor != vendor) || (dt_device != device)) {
252 *bdf = pci_find_device(dt_vendor, dt_device, 0);
260 int fdtdec_get_pci_bar32(const void *blob, int node,
261 struct fdt_pci_addr *addr, u32 *bar)
267 /* get pci devices's bdf */
268 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
272 /* extract the bar number from fdt_pci_addr */
273 barnum = addr->phys_hi & 0xff;
274 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
277 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
278 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
284 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
285 uint64_t default_val)
287 const uint64_t *cell64;
290 cell64 = fdt_getprop(blob, node, prop_name, &length);
291 if (!cell64 || length < sizeof(*cell64))
294 return fdt64_to_cpu(*cell64);
297 int fdtdec_get_is_enabled(const void *blob, int node)
302 * It should say "okay", so only allow that. Some fdts use "ok" but
303 * this is a bug. Please fix your device tree source file. See here
306 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
308 cell = fdt_getprop(blob, node, "status", NULL);
310 return 0 == strcmp(cell, "okay");
314 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
316 enum fdt_compat_id id;
318 /* Search our drivers */
319 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
320 if (0 == fdt_node_check_compatible(blob, node,
323 return COMPAT_UNKNOWN;
326 int fdtdec_next_compatible(const void *blob, int node,
327 enum fdt_compat_id id)
329 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
332 int fdtdec_next_compatible_subnode(const void *blob, int node,
333 enum fdt_compat_id id, int *depthp)
336 node = fdt_next_node(blob, node, depthp);
337 } while (*depthp > 1);
339 /* If this is a direct subnode, and compatible, return it */
340 if (*depthp == 1 && 0 == fdt_node_check_compatible(
341 blob, node, compat_names[id]))
344 return -FDT_ERR_NOTFOUND;
347 int fdtdec_next_alias(const void *blob, const char *name,
348 enum fdt_compat_id id, int *upto)
350 #define MAX_STR_LEN 20
351 char str[MAX_STR_LEN + 20];
354 /* snprintf() is not available */
355 assert(strlen(name) < MAX_STR_LEN);
356 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
357 node = fdt_path_offset(blob, str);
360 err = fdt_node_check_compatible(blob, node, compat_names[id]);
364 return -FDT_ERR_NOTFOUND;
369 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
370 enum fdt_compat_id id, int *node_list, int maxcount)
372 memset(node_list, '\0', sizeof(*node_list) * maxcount);
374 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
377 /* TODO: Can we tighten this code up a little? */
378 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
379 enum fdt_compat_id id, int *node_list, int maxcount)
381 int name_len = strlen(name);
389 /* find the alias node if present */
390 alias_node = fdt_path_offset(blob, "/aliases");
393 * start with nothing, and we can assume that the root node can't
396 memset(nodes, '\0', sizeof(nodes));
398 /* First find all the compatible nodes */
399 for (node = count = 0; node >= 0 && count < maxcount;) {
400 node = fdtdec_next_compatible(blob, node, id);
402 nodes[count++] = node;
405 debug("%s: warning: maxcount exceeded with alias '%s'\n",
408 /* Now find all the aliases */
409 for (offset = fdt_first_property_offset(blob, alias_node);
411 offset = fdt_next_property_offset(blob, offset)) {
412 const struct fdt_property *prop;
418 prop = fdt_get_property_by_offset(blob, offset, NULL);
419 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
420 if (prop->len && 0 == strncmp(path, name, name_len))
421 node = fdt_path_offset(blob, prop->data);
425 /* Get the alias number */
426 number = simple_strtoul(path + name_len, NULL, 10);
427 if (number < 0 || number >= maxcount) {
428 debug("%s: warning: alias '%s' is out of range\n",
433 /* Make sure the node we found is actually in our list! */
435 for (j = 0; j < count; j++)
436 if (nodes[j] == node) {
442 debug("%s: warning: alias '%s' points to a node "
443 "'%s' that is missing or is not compatible "
444 " with '%s'\n", __func__, path,
445 fdt_get_name(blob, node, NULL),
451 * Add this node to our list in the right place, and mark
454 if (fdtdec_get_is_enabled(blob, node)) {
455 if (node_list[number]) {
456 debug("%s: warning: alias '%s' requires that "
457 "a node be placed in the list in a "
458 "position which is already filled by "
459 "node '%s'\n", __func__, path,
460 fdt_get_name(blob, node, NULL));
463 node_list[number] = node;
464 if (number >= num_found)
465 num_found = number + 1;
470 /* Add any nodes not mentioned by an alias */
471 for (i = j = 0; i < maxcount; i++) {
473 for (; j < maxcount; j++)
475 fdtdec_get_is_enabled(blob, nodes[j]))
478 /* Have we run out of nodes to add? */
482 assert(!node_list[i]);
483 node_list[i] = nodes[j++];
492 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
495 int base_len = strlen(base);
496 const char *find_name;
501 find_name = fdt_get_name(blob, offset, &find_namelen);
502 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
504 aliases = fdt_path_offset(blob, "/aliases");
505 for (prop_offset = fdt_first_property_offset(blob, aliases);
507 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
514 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
515 debug(" - %s, %s\n", name, prop);
516 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
517 strncmp(name, base, base_len))
520 slash = strrchr(prop, '/');
521 if (strcmp(slash + 1, find_name))
523 for (p = name + strlen(name) - 1; p > name; p--) {
525 *seqp = simple_strtoul(p + 1, NULL, 10);
526 debug("Found seq %d\n", *seqp);
532 debug("Not found\n");
536 int fdtdec_get_chosen_node(const void *blob, const char *name)
543 return -FDT_ERR_NOTFOUND;
544 chosen_node = fdt_path_offset(blob, "/chosen");
545 prop = fdt_getprop(blob, chosen_node, name, &len);
547 return -FDT_ERR_NOTFOUND;
548 return fdt_path_offset(blob, prop);
551 int fdtdec_check_fdt(void)
554 * We must have an FDT, but we cannot panic() yet since the console
555 * is not ready. So for now, just assert(). Boards which need an early
556 * FDT (prior to console ready) will need to make their own
557 * arrangements and do their own checks.
559 assert(!fdtdec_prepare_fdt());
564 * This function is a little odd in that it accesses global data. At some
565 * point if the architecture board.c files merge this will make more sense.
566 * Even now, it is common code.
568 int fdtdec_prepare_fdt(void)
570 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
571 fdt_check_header(gd->fdt_blob)) {
572 #ifdef CONFIG_SPL_BUILD
573 puts("Missing DTB\n");
575 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");
582 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
587 debug("%s: %s\n", __func__, prop_name);
588 phandle = fdt_getprop(blob, node, prop_name, NULL);
590 return -FDT_ERR_NOTFOUND;
592 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
597 * Look up a property in a node and check that it has a minimum length.
599 * @param blob FDT blob
600 * @param node node to examine
601 * @param prop_name name of property to find
602 * @param min_len minimum property length in bytes
603 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
604 found, or -FDT_ERR_BADLAYOUT if not enough data
605 * @return pointer to cell, which is only valid if err == 0
607 static const void *get_prop_check_min_len(const void *blob, int node,
608 const char *prop_name, int min_len, int *err)
613 debug("%s: %s\n", __func__, prop_name);
614 cell = fdt_getprop(blob, node, prop_name, &len);
616 *err = -FDT_ERR_NOTFOUND;
617 else if (len < min_len)
618 *err = -FDT_ERR_BADLAYOUT;
624 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
625 u32 *array, int count)
630 debug("%s: %s\n", __func__, prop_name);
631 cell = get_prop_check_min_len(blob, node, prop_name,
632 sizeof(u32) * count, &err);
634 for (i = 0; i < count; i++)
635 array[i] = fdt32_to_cpu(cell[i]);
640 int fdtdec_get_int_array_count(const void *blob, int node,
641 const char *prop_name, u32 *array, int count)
647 debug("%s: %s\n", __func__, prop_name);
648 cell = fdt_getprop(blob, node, prop_name, &len);
650 return -FDT_ERR_NOTFOUND;
651 elems = len / sizeof(u32);
654 for (i = 0; i < count; i++)
655 array[i] = fdt32_to_cpu(cell[i]);
660 const u32 *fdtdec_locate_array(const void *blob, int node,
661 const char *prop_name, int count)
666 cell = get_prop_check_min_len(blob, node, prop_name,
667 sizeof(u32) * count, &err);
668 return err ? NULL : cell;
671 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
676 debug("%s: %s\n", __func__, prop_name);
677 cell = fdt_getprop(blob, node, prop_name, &len);
681 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
682 const char *list_name,
683 const char *cells_name,
684 int cell_count, int index,
685 struct fdtdec_phandle_args *out_args)
687 const __be32 *list, *list_end;
688 int rc = 0, size, cur_index = 0;
693 /* Retrieve the phandle list property */
694 list = fdt_getprop(blob, src_node, list_name, &size);
697 list_end = list + size / sizeof(*list);
699 /* Loop over the phandles until all the requested entry is found */
700 while (list < list_end) {
705 * If phandle is 0, then it is an empty entry with no
706 * arguments. Skip forward to the next entry.
708 phandle = be32_to_cpup(list++);
711 * Find the provider node and parse the #*-cells
712 * property to determine the argument length.
714 * This is not needed if the cell count is hard-coded
715 * (i.e. cells_name not set, but cell_count is set),
716 * except when we're going to return the found node
719 if (cells_name || cur_index == index) {
720 node = fdt_node_offset_by_phandle(blob,
723 debug("%s: could not find phandle\n",
724 fdt_get_name(blob, src_node,
731 count = fdtdec_get_int(blob, node, cells_name,
734 debug("%s: could not get %s for %s\n",
735 fdt_get_name(blob, src_node,
738 fdt_get_name(blob, node,
747 * Make sure that the arguments actually fit in the
748 * remaining property data length
750 if (list + count > list_end) {
751 debug("%s: arguments longer than property\n",
752 fdt_get_name(blob, src_node, NULL));
758 * All of the error cases above bail out of the loop, so at
759 * this point, the parsing is successful. If the requested
760 * index matches, then fill the out_args structure and return,
761 * or return -ENOENT for an empty entry.
764 if (cur_index == index) {
771 if (count > MAX_PHANDLE_ARGS) {
772 debug("%s: too many arguments %d\n",
773 fdt_get_name(blob, src_node,
775 count = MAX_PHANDLE_ARGS;
777 out_args->node = node;
778 out_args->args_count = count;
779 for (i = 0; i < count; i++) {
781 be32_to_cpup(list++);
785 /* Found it! return success */
795 * Result will be one of:
796 * -ENOENT : index is for empty phandle
797 * -EINVAL : parsing error on data
798 * [1..n] : Number of phandle (count mode; when index = -1)
800 rc = index < 0 ? cur_index : -ENOENT;
805 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
806 u8 *array, int count)
811 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
813 memcpy(array, cell, count);
817 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
818 const char *prop_name, int count)
823 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
829 int fdtdec_get_config_int(const void *blob, const char *prop_name,
834 debug("%s: %s\n", __func__, prop_name);
835 config_node = fdt_path_offset(blob, "/config");
838 return fdtdec_get_int(blob, config_node, prop_name, default_val);
841 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
846 debug("%s: %s\n", __func__, prop_name);
847 config_node = fdt_path_offset(blob, "/config");
850 prop = fdt_get_property(blob, config_node, prop_name, NULL);
855 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
861 debug("%s: %s\n", __func__, prop_name);
862 nodeoffset = fdt_path_offset(blob, "/config");
866 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
870 return (char *)nodep;
873 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
874 fdt_addr_t *basep, fdt_size_t *sizep)
876 const fdt_addr_t *cell;
879 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
881 cell = fdt_getprop(blob, node, prop_name, &len);
882 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
883 debug("cell=%p, len=%d\n", cell, len);
887 *basep = fdt_addr_to_cpu(*cell);
888 *sizep = fdt_size_to_cpu(cell[1]);
889 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
896 * Read a flash entry from the fdt
898 * @param blob FDT blob
899 * @param node Offset of node to read
900 * @param name Name of node being read
901 * @param entry Place to put offset and size of this node
902 * @return 0 if ok, -ve on error
904 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
905 struct fmap_entry *entry)
910 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
911 debug("Node '%s' has bad/missing 'reg' property\n", name);
912 return -FDT_ERR_NOTFOUND;
914 entry->offset = reg[0];
915 entry->length = reg[1];
916 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
917 prop = fdt_getprop(blob, node, "compress", NULL);
918 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
919 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
920 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
921 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
922 entry->hash = (uint8_t *)prop;
927 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
932 number = (number << 32) | fdt32_to_cpu(*ptr++);
937 int fdt_get_resource(const void *fdt, int node, const char *property,
938 unsigned int index, struct fdt_resource *res)
940 const fdt32_t *ptr, *end;
941 int na, ns, len, parent;
944 parent = fdt_parent_offset(fdt, node);
948 na = fdt_address_cells(fdt, parent);
949 ns = fdt_size_cells(fdt, parent);
951 ptr = fdt_getprop(fdt, node, property, &len);
955 end = ptr + len / sizeof(*ptr);
957 while (ptr + na + ns <= end) {
959 res->start = res->end = fdtdec_get_number(ptr, na);
960 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
968 return -FDT_ERR_NOTFOUND;
971 int fdt_get_named_resource(const void *fdt, int node, const char *property,
972 const char *prop_names, const char *name,
973 struct fdt_resource *res)
977 index = fdt_find_string(fdt, node, prop_names, name);
981 return fdt_get_resource(fdt, node, property, index, res);
984 int fdtdec_decode_memory_region(const void *blob, int config_node,
985 const char *mem_type, const char *suffix,
986 fdt_addr_t *basep, fdt_size_t *sizep)
990 fdt_size_t size, offset_size;
991 fdt_addr_t base, offset;
994 if (config_node == -1) {
995 config_node = fdt_path_offset(blob, "/config");
996 if (config_node < 0) {
997 debug("%s: Cannot find /config node\n", __func__);
1004 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1006 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1008 debug("%s: No memory type for '%s', using /memory\n", __func__,
1013 node = fdt_path_offset(blob, mem);
1015 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1016 fdt_strerror(node));
1021 * Not strictly correct - the memory may have multiple banks. We just
1024 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1025 debug("%s: Failed to decode memory region %s\n", __func__,
1030 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1032 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1034 debug("%s: Failed to decode memory region '%s'\n", __func__,
1039 *basep = base + offset;
1040 *sizep = offset_size;
1045 static int decode_timing_property(const void *blob, int node, const char *name,
1046 struct timing_entry *result)
1048 int length, ret = 0;
1051 prop = fdt_getprop(blob, node, name, &length);
1053 debug("%s: could not find property %s\n",
1054 fdt_get_name(blob, node, NULL), name);
1058 if (length == sizeof(u32)) {
1059 result->typ = fdtdec_get_int(blob, node, name, 0);
1060 result->min = result->typ;
1061 result->max = result->typ;
1063 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1069 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1070 struct display_timing *dt)
1072 int i, node, timings_node;
1076 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1077 if (timings_node < 0)
1078 return timings_node;
1080 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1081 node > 0 && i != index;
1082 node = fdt_next_subnode(blob, node))
1088 memset(dt, 0, sizeof(*dt));
1090 ret |= decode_timing_property(blob, node, "hback-porch",
1092 ret |= decode_timing_property(blob, node, "hfront-porch",
1094 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1095 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1096 ret |= decode_timing_property(blob, node, "vback-porch",
1098 ret |= decode_timing_property(blob, node, "vfront-porch",
1100 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1101 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1102 ret |= decode_timing_property(blob, node, "clock-frequency",
1106 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1108 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1109 DISPLAY_FLAGS_VSYNC_LOW;
1111 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1113 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1114 DISPLAY_FLAGS_HSYNC_LOW;
1116 val = fdtdec_get_int(blob, node, "de-active", -1);
1118 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1119 DISPLAY_FLAGS_DE_LOW;
1121 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1123 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1124 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1127 if (fdtdec_get_bool(blob, node, "interlaced"))
1128 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1129 if (fdtdec_get_bool(blob, node, "doublescan"))
1130 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1131 if (fdtdec_get_bool(blob, node, "doubleclk"))
1132 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1137 int fdtdec_setup(void)
1139 #ifdef CONFIG_OF_CONTROL
1140 # ifdef CONFIG_OF_EMBED
1141 /* Get a pointer to the FDT */
1142 gd->fdt_blob = __dtb_dt_begin;
1143 # elif defined CONFIG_OF_SEPARATE
1144 # ifdef CONFIG_SPL_BUILD
1145 /* FDT is at end of BSS */
1146 gd->fdt_blob = (ulong *)&__bss_end;
1148 /* FDT is at end of image */
1149 gd->fdt_blob = (ulong *)&_end;
1151 # elif defined(CONFIG_OF_HOSTFILE)
1152 if (sandbox_read_fdt_from_file()) {
1153 puts("Failed to read control FDT\n");
1157 # ifndef CONFIG_SPL_BUILD
1158 /* Allow the early environment to override the fdt address */
1159 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1160 (uintptr_t)gd->fdt_blob);
1163 return fdtdec_prepare_fdt();
1166 #endif /* !USE_HOSTCC */