1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2011 The Chromium OS Authors.
15 #include <dm/of_extra.h>
19 #include <fdt_support.h>
22 #include <linux/libfdt.h>
24 #include <asm/global_data.h>
25 #include <asm/sections.h>
26 #include <linux/ctype.h>
27 #include <linux/lzo.h>
28 #include <linux/ioport.h>
30 DECLARE_GLOBAL_DATA_PTR;
33 * Here are the type we know about. One day we might allow drivers to
34 * register. For now we just put them here. The COMPAT macro allows us to
35 * turn this into a sparse list later, and keeps the ID with the name.
37 * NOTE: This list is basically a TODO list for things that need to be
38 * converted to driver model. So don't add new things here unless there is a
39 * good reason why driver-model conversion is infeasible. Examples include
40 * things which are used before driver model is available.
42 #define COMPAT(id, name) name
43 static const char * const compat_names[COMPAT_COUNT] = {
44 COMPAT(UNKNOWN, "<none>"),
45 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
46 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
47 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
48 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
49 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
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_MIPI_DSI, "samsung,exynos-mipi-dsi"),
54 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
55 COMPAT(GENERIC_SPI_FLASH, "jedec,spi-nor"),
56 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
57 COMPAT(INTEL_MICROCODE, "intel,microcode"),
58 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
59 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
60 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
61 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
62 COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
63 COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
64 COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
65 COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
66 COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
67 COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
68 COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
69 COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
70 COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
71 COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
72 COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
73 COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
74 COMPAT(ALTERA_SOCFPGA_FPGA0, "altr,socfpga-a10-fpga-mgr"),
75 COMPAT(ALTERA_SOCFPGA_NOC, "altr,socfpga-a10-noc"),
76 COMPAT(ALTERA_SOCFPGA_CLK_INIT, "altr,socfpga-a10-clk-init")
79 const char *fdtdec_get_compatible(enum fdt_compat_id id)
81 /* We allow reading of the 'unknown' ID for testing purposes */
82 assert(id >= 0 && id < COMPAT_COUNT);
83 return compat_names[id];
86 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
87 const char *prop_name, int index, int na,
88 int ns, fdt_size_t *sizep,
91 const fdt32_t *prop, *prop_end;
92 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
96 debug("%s: %s: ", __func__, prop_name);
98 prop = fdt_getprop(blob, node, prop_name, &len);
100 debug("(not found)\n");
101 return FDT_ADDR_T_NONE;
103 prop_end = prop + (len / sizeof(*prop));
105 prop_addr = prop + (index * (na + ns));
106 prop_size = prop_addr + na;
107 prop_after_size = prop_size + ns;
108 if (prop_after_size > prop_end) {
109 debug("(not enough data: expected >= %d cells, got %d cells)\n",
110 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
111 return FDT_ADDR_T_NONE;
114 #if CONFIG_IS_ENABLED(OF_TRANSLATE)
116 addr = fdt_translate_address(blob, node, prop_addr);
119 addr = fdtdec_get_number(prop_addr, na);
122 *sizep = fdtdec_get_number(prop_size, ns);
123 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
124 (unsigned long long)*sizep);
126 debug("addr=%08llx\n", (unsigned long long)addr);
132 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
133 int node, const char *prop_name,
134 int index, fdt_size_t *sizep,
139 debug("%s: ", __func__);
141 na = fdt_address_cells(blob, parent);
143 debug("(bad #address-cells)\n");
144 return FDT_ADDR_T_NONE;
147 ns = fdt_size_cells(blob, parent);
149 debug("(bad #size-cells)\n");
150 return FDT_ADDR_T_NONE;
153 debug("na=%d, ns=%d, ", na, ns);
155 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
156 ns, sizep, translate);
159 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
160 const char *prop_name, int index,
166 debug("%s: ", __func__);
168 parent = fdt_parent_offset(blob, node);
170 debug("(no parent found)\n");
171 return FDT_ADDR_T_NONE;
174 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
175 index, sizep, translate);
178 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
179 const char *prop_name, fdt_size_t *sizep)
181 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
183 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
184 sizeof(fdt_addr_t) / sizeof(fdt32_t),
188 fdt_addr_t fdtdec_get_addr(const void *blob, int node, const char *prop_name)
190 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
193 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
195 const char *list, *end;
198 list = fdt_getprop(blob, node, "compatible", &len);
205 if (len >= strlen("pciVVVV,DDDD")) {
206 char *s = strstr(list, "pci");
209 * check if the string is something like pciVVVV,DDDD.RR
210 * or just pciVVVV,DDDD
212 if (s && s[7] == ',' &&
213 (s[12] == '.' || s[12] == 0)) {
215 *vendor = simple_strtol(s, NULL, 16);
218 *device = simple_strtol(s, NULL, 16);
229 int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr,
234 /* extract the bar number from fdt_pci_addr */
235 barnum = addr->phys_hi & 0xff;
236 if (barnum < PCI_BASE_ADDRESS_0 || barnum > PCI_CARDBUS_CIS)
239 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
242 * There is a strange toolchain bug with nds32 which complains about
243 * an undefined reference here, even if fdtdec_get_pci_bar32() is never
244 * called. An #ifdef seems to be the only fix!
246 #if !IS_ENABLED(CONFIG_NDS32)
247 *bar = dm_pci_read_bar32(dev, barnum);
253 int fdtdec_get_pci_bus_range(const void *blob, int node,
254 struct fdt_resource *res)
259 values = fdt_getprop(blob, node, "bus-range", &len);
260 if (!values || len < sizeof(*values) * 2)
263 res->start = fdt32_to_cpu(*values++);
264 res->end = fdt32_to_cpu(*values);
269 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
270 uint64_t default_val)
272 const unaligned_fdt64_t *cell64;
275 cell64 = fdt_getprop(blob, node, prop_name, &length);
276 if (!cell64 || length < sizeof(*cell64))
279 return fdt64_to_cpu(*cell64);
282 int fdtdec_get_is_enabled(const void *blob, int node)
287 * It should say "okay", so only allow that. Some fdts use "ok" but
288 * this is a bug. Please fix your device tree source file. See here
291 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
293 cell = fdt_getprop(blob, node, "status", NULL);
295 return strcmp(cell, "okay") == 0;
299 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
301 enum fdt_compat_id id;
303 /* Search our drivers */
304 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
305 if (fdt_node_check_compatible(blob, node,
306 compat_names[id]) == 0)
308 return COMPAT_UNKNOWN;
311 int fdtdec_next_compatible(const void *blob, int node, enum fdt_compat_id id)
313 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
316 int fdtdec_next_compatible_subnode(const void *blob, int node,
317 enum fdt_compat_id id, int *depthp)
320 node = fdt_next_node(blob, node, depthp);
321 } while (*depthp > 1);
323 /* If this is a direct subnode, and compatible, return it */
324 if (*depthp == 1 && 0 == fdt_node_check_compatible(
325 blob, node, compat_names[id]))
328 return -FDT_ERR_NOTFOUND;
331 int fdtdec_next_alias(const void *blob, const char *name, enum fdt_compat_id id,
334 #define MAX_STR_LEN 20
335 char str[MAX_STR_LEN + 20];
338 /* snprintf() is not available */
339 assert(strlen(name) < MAX_STR_LEN);
340 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
341 node = fdt_path_offset(blob, str);
344 err = fdt_node_check_compatible(blob, node, compat_names[id]);
348 return -FDT_ERR_NOTFOUND;
353 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
354 enum fdt_compat_id id, int *node_list,
357 memset(node_list, '\0', sizeof(*node_list) * maxcount);
359 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
362 /* TODO: Can we tighten this code up a little? */
363 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
364 enum fdt_compat_id id, int *node_list,
367 int name_len = strlen(name);
375 /* find the alias node if present */
376 alias_node = fdt_path_offset(blob, "/aliases");
379 * start with nothing, and we can assume that the root node can't
382 memset(nodes, '\0', sizeof(nodes));
384 /* First find all the compatible nodes */
385 for (node = count = 0; node >= 0 && count < maxcount;) {
386 node = fdtdec_next_compatible(blob, node, id);
388 nodes[count++] = node;
391 debug("%s: warning: maxcount exceeded with alias '%s'\n",
394 /* Now find all the aliases */
395 for (offset = fdt_first_property_offset(blob, alias_node);
397 offset = fdt_next_property_offset(blob, offset)) {
398 const struct fdt_property *prop;
404 prop = fdt_get_property_by_offset(blob, offset, NULL);
405 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
406 if (prop->len && 0 == strncmp(path, name, name_len))
407 node = fdt_path_offset(blob, prop->data);
411 /* Get the alias number */
412 number = dectoul(path + name_len, NULL);
413 if (number < 0 || number >= maxcount) {
414 debug("%s: warning: alias '%s' is out of range\n",
419 /* Make sure the node we found is actually in our list! */
421 for (j = 0; j < count; j++)
422 if (nodes[j] == node) {
428 debug("%s: warning: alias '%s' points to a node "
429 "'%s' that is missing or is not compatible "
430 " with '%s'\n", __func__, path,
431 fdt_get_name(blob, node, NULL),
437 * Add this node to our list in the right place, and mark
440 if (fdtdec_get_is_enabled(blob, node)) {
441 if (node_list[number]) {
442 debug("%s: warning: alias '%s' requires that "
443 "a node be placed in the list in a "
444 "position which is already filled by "
445 "node '%s'\n", __func__, path,
446 fdt_get_name(blob, node, NULL));
449 node_list[number] = node;
450 if (number >= num_found)
451 num_found = number + 1;
456 /* Add any nodes not mentioned by an alias */
457 for (i = j = 0; i < maxcount; i++) {
459 for (; j < maxcount; j++)
461 fdtdec_get_is_enabled(blob, nodes[j]))
464 /* Have we run out of nodes to add? */
468 assert(!node_list[i]);
469 node_list[i] = nodes[j++];
478 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
481 int base_len = strlen(base);
482 const char *find_name;
487 find_name = fdt_get_name(blob, offset, &find_namelen);
488 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
490 aliases = fdt_path_offset(blob, "/aliases");
491 for (prop_offset = fdt_first_property_offset(blob, aliases);
493 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
499 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
500 debug(" - %s, %s\n", name, prop);
501 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
502 strncmp(name, base, base_len))
505 slash = strrchr(prop, '/');
506 if (strcmp(slash + 1, find_name))
510 * Adding an extra check to distinguish DT nodes with
513 if (IS_ENABLED(CONFIG_PHANDLE_CHECK_SEQ)) {
514 if (fdt_get_phandle(blob, offset) !=
515 fdt_get_phandle(blob, fdt_path_offset(blob, prop)))
519 val = trailing_strtol(name);
522 debug("Found seq %d\n", *seqp);
527 debug("Not found\n");
531 int fdtdec_get_alias_highest_id(const void *blob, const char *base)
533 int base_len = strlen(base);
538 debug("Looking for highest alias id for '%s'\n", base);
540 aliases = fdt_path_offset(blob, "/aliases");
541 for (prop_offset = fdt_first_property_offset(blob, aliases);
543 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
548 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
549 debug(" - %s, %s\n", name, prop);
550 if (*prop != '/' || prop[len - 1] ||
551 strncmp(name, base, base_len))
554 val = trailing_strtol(name);
556 debug("Found seq %d\n", val);
564 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
570 chosen_node = fdt_path_offset(blob, "/chosen");
571 return fdt_getprop(blob, chosen_node, name, NULL);
574 int fdtdec_get_chosen_node(const void *blob, const char *name)
578 prop = fdtdec_get_chosen_prop(blob, name);
580 return -FDT_ERR_NOTFOUND;
581 return fdt_path_offset(blob, prop);
584 int fdtdec_check_fdt(void)
587 * We must have an FDT, but we cannot panic() yet since the console
588 * is not ready. So for now, just assert(). Boards which need an early
589 * FDT (prior to console ready) will need to make their own
590 * arrangements and do their own checks.
592 assert(!fdtdec_prepare_fdt());
597 * This function is a little odd in that it accesses global data. At some
598 * point if the architecture board.c files merge this will make more sense.
599 * Even now, it is common code.
601 int fdtdec_prepare_fdt(void)
603 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
604 fdt_check_header(gd->fdt_blob)) {
605 #ifdef CONFIG_SPL_BUILD
606 puts("Missing DTB\n");
608 printf("No valid device tree binary found at %p\n",
612 printf("fdt_blob=%p\n", gd->fdt_blob);
613 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
623 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
628 debug("%s: %s\n", __func__, prop_name);
629 phandle = fdt_getprop(blob, node, prop_name, NULL);
631 return -FDT_ERR_NOTFOUND;
633 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
638 * Look up a property in a node and check that it has a minimum length.
640 * @param blob FDT blob
641 * @param node node to examine
642 * @param prop_name name of property to find
643 * @param min_len minimum property length in bytes
644 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
645 found, or -FDT_ERR_BADLAYOUT if not enough data
646 * @return pointer to cell, which is only valid if err == 0
648 static const void *get_prop_check_min_len(const void *blob, int node,
649 const char *prop_name, int min_len,
655 debug("%s: %s\n", __func__, prop_name);
656 cell = fdt_getprop(blob, node, prop_name, &len);
658 *err = -FDT_ERR_NOTFOUND;
659 else if (len < min_len)
660 *err = -FDT_ERR_BADLAYOUT;
666 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
667 u32 *array, int count)
672 debug("%s: %s\n", __func__, prop_name);
673 cell = get_prop_check_min_len(blob, node, prop_name,
674 sizeof(u32) * count, &err);
678 for (i = 0; i < count; i++)
679 array[i] = fdt32_to_cpu(cell[i]);
684 int fdtdec_get_int_array_count(const void *blob, int node,
685 const char *prop_name, u32 *array, int count)
691 debug("%s: %s\n", __func__, prop_name);
692 cell = fdt_getprop(blob, node, prop_name, &len);
694 return -FDT_ERR_NOTFOUND;
695 elems = len / sizeof(u32);
698 for (i = 0; i < count; i++)
699 array[i] = fdt32_to_cpu(cell[i]);
704 const u32 *fdtdec_locate_array(const void *blob, int node,
705 const char *prop_name, int count)
710 cell = get_prop_check_min_len(blob, node, prop_name,
711 sizeof(u32) * count, &err);
712 return err ? NULL : cell;
715 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
720 debug("%s: %s\n", __func__, prop_name);
721 cell = fdt_getprop(blob, node, prop_name, &len);
725 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
726 const char *list_name,
727 const char *cells_name,
728 int cell_count, int index,
729 struct fdtdec_phandle_args *out_args)
731 const __be32 *list, *list_end;
732 int rc = 0, size, cur_index = 0;
737 /* Retrieve the phandle list property */
738 list = fdt_getprop(blob, src_node, list_name, &size);
741 list_end = list + size / sizeof(*list);
743 /* Loop over the phandles until all the requested entry is found */
744 while (list < list_end) {
749 * If phandle is 0, then it is an empty entry with no
750 * arguments. Skip forward to the next entry.
752 phandle = be32_to_cpup(list++);
755 * Find the provider node and parse the #*-cells
756 * property to determine the argument length.
758 * This is not needed if the cell count is hard-coded
759 * (i.e. cells_name not set, but cell_count is set),
760 * except when we're going to return the found node
763 if (cells_name || cur_index == index) {
764 node = fdt_node_offset_by_phandle(blob,
767 debug("%s: could not find phandle\n",
768 fdt_get_name(blob, src_node,
775 count = fdtdec_get_int(blob, node, cells_name,
778 debug("%s: could not get %s for %s\n",
779 fdt_get_name(blob, src_node,
782 fdt_get_name(blob, node,
791 * Make sure that the arguments actually fit in the
792 * remaining property data length
794 if (list + count > list_end) {
795 debug("%s: arguments longer than property\n",
796 fdt_get_name(blob, src_node, NULL));
802 * All of the error cases above bail out of the loop, so at
803 * this point, the parsing is successful. If the requested
804 * index matches, then fill the out_args structure and return,
805 * or return -ENOENT for an empty entry.
808 if (cur_index == index) {
815 if (count > MAX_PHANDLE_ARGS) {
816 debug("%s: too many arguments %d\n",
817 fdt_get_name(blob, src_node,
819 count = MAX_PHANDLE_ARGS;
821 out_args->node = node;
822 out_args->args_count = count;
823 for (i = 0; i < count; i++) {
825 be32_to_cpup(list++);
829 /* Found it! return success */
839 * Result will be one of:
840 * -ENOENT : index is for empty phandle
841 * -EINVAL : parsing error on data
842 * [1..n] : Number of phandle (count mode; when index = -1)
844 rc = index < 0 ? cur_index : -ENOENT;
849 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
850 u8 *array, int count)
855 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
857 memcpy(array, cell, count);
861 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
862 const char *prop_name, int count)
867 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
873 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
878 number = (number << 32) | fdt32_to_cpu(*ptr++);
883 int fdt_get_resource(const void *fdt, int node, const char *property,
884 unsigned int index, struct fdt_resource *res)
886 const fdt32_t *ptr, *end;
887 int na, ns, len, parent;
890 parent = fdt_parent_offset(fdt, node);
894 na = fdt_address_cells(fdt, parent);
895 ns = fdt_size_cells(fdt, parent);
897 ptr = fdt_getprop(fdt, node, property, &len);
901 end = ptr + len / sizeof(*ptr);
903 while (ptr + na + ns <= end) {
905 if (CONFIG_IS_ENABLED(OF_TRANSLATE))
906 res->start = fdt_translate_address(fdt, node, ptr);
908 res->start = fdtdec_get_number(ptr, na);
910 res->end = res->start;
911 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
919 return -FDT_ERR_NOTFOUND;
922 int fdt_get_named_resource(const void *fdt, int node, const char *property,
923 const char *prop_names, const char *name,
924 struct fdt_resource *res)
928 index = fdt_stringlist_search(fdt, node, prop_names, name);
932 return fdt_get_resource(fdt, node, property, index, res);
935 static int decode_timing_property(const void *blob, int node, const char *name,
936 struct timing_entry *result)
941 prop = fdt_getprop(blob, node, name, &length);
943 debug("%s: could not find property %s\n",
944 fdt_get_name(blob, node, NULL), name);
948 if (length == sizeof(u32)) {
949 result->typ = fdtdec_get_int(blob, node, name, 0);
950 result->min = result->typ;
951 result->max = result->typ;
953 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
959 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
960 struct display_timing *dt)
962 int i, node, timings_node;
966 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
967 if (timings_node < 0)
970 for (i = 0, node = fdt_first_subnode(blob, timings_node);
971 node > 0 && i != index;
972 node = fdt_next_subnode(blob, node))
978 memset(dt, 0, sizeof(*dt));
980 ret |= decode_timing_property(blob, node, "hback-porch",
982 ret |= decode_timing_property(blob, node, "hfront-porch",
984 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
985 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
986 ret |= decode_timing_property(blob, node, "vback-porch",
988 ret |= decode_timing_property(blob, node, "vfront-porch",
990 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
991 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
992 ret |= decode_timing_property(blob, node, "clock-frequency",
996 val = fdtdec_get_int(blob, node, "vsync-active", -1);
998 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
999 DISPLAY_FLAGS_VSYNC_LOW;
1001 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1003 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1004 DISPLAY_FLAGS_HSYNC_LOW;
1006 val = fdtdec_get_int(blob, node, "de-active", -1);
1008 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1009 DISPLAY_FLAGS_DE_LOW;
1011 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1013 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1014 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1017 if (fdtdec_get_bool(blob, node, "interlaced"))
1018 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1019 if (fdtdec_get_bool(blob, node, "doublescan"))
1020 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1021 if (fdtdec_get_bool(blob, node, "doubleclk"))
1022 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1027 int fdtdec_setup_mem_size_base(void)
1031 struct resource res;
1033 mem = ofnode_path("/memory");
1034 if (!ofnode_valid(mem)) {
1035 debug("%s: Missing /memory node\n", __func__);
1039 ret = ofnode_read_resource(mem, 0, &res);
1041 debug("%s: Unable to decode first memory bank\n", __func__);
1045 gd->ram_size = (phys_size_t)(res.end - res.start + 1);
1046 gd->ram_base = (unsigned long)res.start;
1047 debug("%s: Initial DRAM size %llx\n", __func__,
1048 (unsigned long long)gd->ram_size);
1053 ofnode get_next_memory_node(ofnode mem)
1056 mem = ofnode_by_prop_value(mem, "device_type", "memory", 7);
1057 } while (!ofnode_is_available(mem));
1062 int fdtdec_setup_memory_banksize(void)
1064 int bank, ret, reg = 0;
1065 struct resource res;
1066 ofnode mem = ofnode_null();
1068 mem = get_next_memory_node(mem);
1069 if (!ofnode_valid(mem)) {
1070 debug("%s: Missing /memory node\n", __func__);
1074 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1075 ret = ofnode_read_resource(mem, reg++, &res);
1078 mem = get_next_memory_node(mem);
1079 if (!ofnode_valid(mem))
1082 ret = ofnode_read_resource(mem, reg++, &res);
1090 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
1091 gd->bd->bi_dram[bank].size =
1092 (phys_size_t)(res.end - res.start + 1);
1094 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
1096 (unsigned long long)gd->bd->bi_dram[bank].start,
1097 (unsigned long long)gd->bd->bi_dram[bank].size);
1103 int fdtdec_setup_mem_size_base_lowest(void)
1105 int bank, ret, reg = 0;
1106 struct resource res;
1109 ofnode mem = ofnode_null();
1111 gd->ram_base = (unsigned long)~0;
1113 mem = get_next_memory_node(mem);
1114 if (!ofnode_valid(mem)) {
1115 debug("%s: Missing /memory node\n", __func__);
1119 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1120 ret = ofnode_read_resource(mem, reg++, &res);
1123 mem = get_next_memory_node(mem);
1124 if (!ofnode_valid(mem))
1127 ret = ofnode_read_resource(mem, reg++, &res);
1135 base = (unsigned long)res.start;
1136 size = (phys_size_t)(res.end - res.start + 1);
1138 if (gd->ram_base > base && size) {
1139 gd->ram_base = base;
1140 gd->ram_size = size;
1141 debug("%s: Initial DRAM base %lx size %lx\n",
1142 __func__, base, (unsigned long)size);
1149 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1150 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\
1151 CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO)
1152 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1154 size_t sz_out = CONFIG_VAL(MULTI_DTB_FIT_UNCOMPRESS_SZ);
1155 bool gzip = 0, lzo = 0;
1156 ulong sz_in = sz_src;
1160 if (CONFIG_IS_ENABLED(GZIP))
1161 if (gzip_parse_header(src, sz_in) >= 0)
1163 if (CONFIG_IS_ENABLED(LZO))
1164 if (!gzip && lzop_is_valid_header(src))
1171 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
1172 dst = malloc(sz_out);
1174 puts("uncompress_blob: Unable to allocate memory\n");
1178 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA)
1179 dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
1185 if (CONFIG_IS_ENABLED(GZIP) && gzip)
1186 rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
1187 else if (CONFIG_IS_ENABLED(LZO) && lzo)
1188 rc = lzop_decompress(src, sz_in, dst, &sz_out);
1193 /* not a valid compressed blob */
1194 puts("uncompress_blob: Unable to uncompress\n");
1195 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC))
1203 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1205 *dstp = (void *)src;
1211 #if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
1213 * For CONFIG_OF_SEPARATE, the board may optionally implement this to
1214 * provide and/or fixup the fdt.
1216 __weak void *board_fdt_blob_setup(void)
1218 void *fdt_blob = NULL;
1219 #ifdef CONFIG_SPL_BUILD
1220 /* FDT is at end of BSS unless it is in a different memory region */
1221 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1222 fdt_blob = (ulong *)&_image_binary_end;
1224 fdt_blob = (ulong *)&__bss_end;
1226 /* FDT is at end of image */
1227 fdt_blob = (ulong *)&_end;
1233 int fdtdec_set_ethernet_mac_address(void *fdt, const u8 *mac, size_t size)
1238 if (!is_valid_ethaddr(mac))
1241 path = fdt_get_alias(fdt, "ethernet");
1245 debug("ethernet alias found: %s\n", path);
1247 offset = fdt_path_offset(fdt, path);
1249 debug("ethernet alias points to absent node %s\n", path);
1253 err = fdt_setprop_inplace(fdt, offset, "local-mac-address", mac, size);
1257 debug("MAC address: %pM\n", mac);
1262 static int fdtdec_init_reserved_memory(void *blob)
1264 int na, ns, node, err;
1267 /* inherit #address-cells and #size-cells from the root node */
1268 na = fdt_address_cells(blob, 0);
1269 ns = fdt_size_cells(blob, 0);
1271 node = fdt_add_subnode(blob, 0, "reserved-memory");
1275 err = fdt_setprop(blob, node, "ranges", NULL, 0);
1279 value = cpu_to_fdt32(ns);
1281 err = fdt_setprop(blob, node, "#size-cells", &value, sizeof(value));
1285 value = cpu_to_fdt32(na);
1287 err = fdt_setprop(blob, node, "#address-cells", &value, sizeof(value));
1294 int fdtdec_add_reserved_memory(void *blob, const char *basename,
1295 const struct fdt_memory *carveout,
1296 const char **compatibles, unsigned int count,
1297 uint32_t *phandlep, unsigned long flags)
1299 fdt32_t cells[4] = {}, *ptr = cells;
1300 uint32_t upper, lower, phandle;
1301 int parent, node, na, ns, err;
1305 /* create an empty /reserved-memory node if one doesn't exist */
1306 parent = fdt_path_offset(blob, "/reserved-memory");
1308 parent = fdtdec_init_reserved_memory(blob);
1313 /* only 1 or 2 #address-cells and #size-cells are supported */
1314 na = fdt_address_cells(blob, parent);
1315 if (na < 1 || na > 2)
1316 return -FDT_ERR_BADNCELLS;
1318 ns = fdt_size_cells(blob, parent);
1319 if (ns < 1 || ns > 2)
1320 return -FDT_ERR_BADNCELLS;
1322 /* find a matching node and return the phandle to that */
1323 fdt_for_each_subnode(node, blob, parent) {
1324 const char *name = fdt_get_name(blob, node, NULL);
1328 addr = fdtdec_get_addr_size_fixed(blob, node, "reg", 0, na, ns,
1330 if (addr == FDT_ADDR_T_NONE) {
1331 debug("failed to read address/size for %s\n", name);
1335 if (addr == carveout->start && (addr + size - 1) ==
1338 *phandlep = fdt_get_phandle(blob, node);
1344 * Unpack the start address and generate the name of the new node
1345 * base on the basename and the unit-address.
1347 upper = upper_32_bits(carveout->start);
1348 lower = lower_32_bits(carveout->start);
1350 if (na > 1 && upper > 0)
1351 snprintf(name, sizeof(name), "%s@%x,%x", basename, upper,
1355 debug("address %08x:%08x exceeds addressable space\n",
1357 return -FDT_ERR_BADVALUE;
1360 snprintf(name, sizeof(name), "%s@%x", basename, lower);
1363 node = fdt_add_subnode(blob, parent, name);
1367 if (flags & FDTDEC_RESERVED_MEMORY_NO_MAP) {
1368 err = fdt_setprop(blob, node, "no-map", NULL, 0);
1374 err = fdt_generate_phandle(blob, &phandle);
1378 err = fdtdec_set_phandle(blob, node, phandle);
1383 /* store one or two address cells */
1385 *ptr++ = cpu_to_fdt32(upper);
1387 *ptr++ = cpu_to_fdt32(lower);
1389 /* store one or two size cells */
1390 size = carveout->end - carveout->start + 1;
1391 upper = upper_32_bits(size);
1392 lower = lower_32_bits(size);
1395 *ptr++ = cpu_to_fdt32(upper);
1397 *ptr++ = cpu_to_fdt32(lower);
1399 err = fdt_setprop(blob, node, "reg", cells, (na + ns) * sizeof(*cells));
1403 if (compatibles && count > 0) {
1404 size_t length = 0, len = 0;
1408 for (i = 0; i < count; i++)
1409 length += strlen(compatibles[i]) + 1;
1411 buffer = malloc(length);
1413 return -FDT_ERR_INTERNAL;
1415 for (i = 0; i < count; i++)
1416 len += strlcpy(buffer + len, compatibles[i],
1419 err = fdt_setprop(blob, node, "compatible", buffer, length);
1425 /* return the phandle for the new node for the caller to use */
1427 *phandlep = phandle;
1432 int fdtdec_get_carveout(const void *blob, const char *node,
1433 const char *prop_name, unsigned int index,
1434 struct fdt_memory *carveout, const char **name,
1435 const char ***compatiblesp, unsigned int *countp,
1436 unsigned long *flags)
1438 const fdt32_t *prop;
1443 offset = fdt_path_offset(blob, node);
1447 prop = fdt_getprop(blob, offset, prop_name, &len);
1449 debug("failed to get %s for %s\n", prop_name, node);
1450 return -FDT_ERR_NOTFOUND;
1453 if ((len % sizeof(phandle)) != 0) {
1454 debug("invalid phandle property\n");
1455 return -FDT_ERR_BADPHANDLE;
1458 if (len < (sizeof(phandle) * (index + 1))) {
1459 debug("invalid phandle index\n");
1460 return -FDT_ERR_NOTFOUND;
1463 phandle = fdt32_to_cpu(prop[index]);
1465 offset = fdt_node_offset_by_phandle(blob, phandle);
1467 debug("failed to find node for phandle %u\n", phandle);
1472 *name = fdt_get_name(blob, offset, NULL);
1475 const char **compatibles = NULL;
1476 const char *start, *end, *ptr;
1477 unsigned int count = 0;
1479 prop = fdt_getprop(blob, offset, "compatible", &len);
1483 start = ptr = (const char *)prop;
1487 ptr = strchrnul(ptr, '\0');
1492 compatibles = malloc(sizeof(ptr) * count);
1494 return -FDT_ERR_INTERNAL;
1500 compatibles[count] = ptr;
1501 ptr = strchrnul(ptr, '\0');
1507 *compatiblesp = compatibles;
1513 carveout->start = fdtdec_get_addr_size_auto_noparent(blob, offset,
1516 if (carveout->start == FDT_ADDR_T_NONE) {
1517 debug("failed to read address/size from \"reg\" property\n");
1518 return -FDT_ERR_NOTFOUND;
1521 carveout->end = carveout->start + size - 1;
1526 if (fdtdec_get_bool(blob, offset, "no-map"))
1527 *flags |= FDTDEC_RESERVED_MEMORY_NO_MAP;
1533 int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
1534 unsigned int index, const struct fdt_memory *carveout,
1535 const char *name, const char **compatibles,
1536 unsigned int count, unsigned long flags)
1539 int err, offset, len;
1543 err = fdtdec_add_reserved_memory(blob, name, carveout, compatibles,
1544 count, &phandle, flags);
1546 debug("failed to add reserved memory: %d\n", err);
1550 offset = fdt_path_offset(blob, node);
1552 debug("failed to find offset for node %s: %d\n", node, offset);
1556 value = cpu_to_fdt32(phandle);
1558 if (!fdt_getprop(blob, offset, prop_name, &len)) {
1559 if (len == -FDT_ERR_NOTFOUND)
1565 if ((index + 1) * sizeof(value) > len) {
1566 err = fdt_setprop_placeholder(blob, offset, prop_name,
1567 (index + 1) * sizeof(value),
1570 debug("failed to resize reserved memory property: %s\n",
1576 err = fdt_setprop_inplace_namelen_partial(blob, offset, prop_name,
1578 index * sizeof(value),
1579 &value, sizeof(value));
1581 debug("failed to update %s property for node %s: %s\n",
1582 prop_name, node, fdt_strerror(err));
1589 __weak int fdtdec_board_setup(const void *fdt_blob)
1594 int fdtdec_setup(void)
1597 #if CONFIG_IS_ENABLED(OF_CONTROL)
1598 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1601 # ifdef CONFIG_OF_EMBED
1602 /* Get a pointer to the FDT */
1603 # ifdef CONFIG_SPL_BUILD
1604 gd->fdt_blob = __dtb_dt_spl_begin;
1606 gd->fdt_blob = __dtb_dt_begin;
1608 # elif defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
1609 /* Allow the board to override the fdt address. */
1610 gd->fdt_blob = board_fdt_blob_setup();
1611 # elif defined(CONFIG_OF_HOSTFILE)
1612 if (sandbox_read_fdt_from_file()) {
1613 puts("Failed to read control FDT\n");
1617 # ifndef CONFIG_SPL_BUILD
1618 /* Allow the early environment to override the fdt address */
1619 gd->fdt_blob = map_sysmem
1620 (env_get_ulong("fdtcontroladdr", 16,
1621 (unsigned long)map_to_sysmem(gd->fdt_blob)), 0);
1624 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1626 * Try and uncompress the blob.
1627 * Unfortunately there is no way to know how big the input blob really
1628 * is. So let us set the maximum input size arbitrarily high. 16MB
1629 * ought to be more than enough for packed DTBs.
1631 if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0)
1632 gd->fdt_blob = fdt_blob;
1635 * Check if blob is a FIT images containings DTBs.
1636 * If so, pick the most relevant
1638 fdt_blob = locate_dtb_in_fit(gd->fdt_blob);
1640 gd->multi_dtb_fit = gd->fdt_blob;
1641 gd->fdt_blob = fdt_blob;
1647 ret = fdtdec_prepare_fdt();
1649 ret = fdtdec_board_setup(gd->fdt_blob);
1653 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1654 int fdtdec_resetup(int *rescan)
1659 * If the current DTB is part of a compressed FIT image,
1660 * try to locate the best match from the uncompressed
1661 * FIT image stillpresent there. Save the time and space
1662 * required to uncompress it again.
1664 if (gd->multi_dtb_fit) {
1665 fdt_blob = locate_dtb_in_fit(gd->multi_dtb_fit);
1667 if (fdt_blob == gd->fdt_blob) {
1669 * The best match did not change. no need to tear down
1670 * the DM and rescan the fdt.
1677 gd->fdt_blob = fdt_blob;
1678 return fdtdec_prepare_fdt();
1682 * If multi_dtb_fit is NULL, it means that blob appended to u-boot is
1683 * not a FIT image containings DTB, but a single DTB. There is no need
1684 * to teard down DM and rescan the DT in this case.
1691 int fdtdec_decode_ram_size(const void *blob, const char *area, int board_id,
1692 phys_addr_t *basep, phys_size_t *sizep,
1695 int addr_cells, size_cells;
1696 const u32 *cell, *end;
1697 u64 total_size, size, addr;
1703 debug("%s: board_id=%d\n", __func__, board_id);
1706 node = fdt_path_offset(blob, area);
1708 debug("No %s node found\n", area);
1712 cell = fdt_getprop(blob, node, "reg", &len);
1714 debug("No reg property found\n");
1718 addr_cells = fdt_address_cells(blob, node);
1719 size_cells = fdt_size_cells(blob, node);
1721 /* Check the board id and mask */
1722 for (child = fdt_first_subnode(blob, node);
1724 child = fdt_next_subnode(blob, child)) {
1725 int match_mask, match_value;
1727 match_mask = fdtdec_get_int(blob, child, "match-mask", -1);
1728 match_value = fdtdec_get_int(blob, child, "match-value", -1);
1730 if (match_value >= 0 &&
1731 ((board_id & match_mask) == match_value)) {
1732 /* Found matching mask */
1733 debug("Found matching mask %d\n", match_mask);
1735 cell = fdt_getprop(blob, node, "reg", &len);
1737 debug("No memory-banks property found\n");
1743 /* Note: if no matching subnode was found we use the parent node */
1746 memset(bd->bi_dram, '\0', sizeof(bd->bi_dram[0]) *
1747 CONFIG_NR_DRAM_BANKS);
1750 auto_size = fdtdec_get_bool(blob, node, "auto-size");
1753 end = cell + len / 4 - addr_cells - size_cells;
1754 debug("cell at %p, end %p\n", cell, end);
1755 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1759 if (addr_cells == 2)
1760 addr += (u64)fdt32_to_cpu(*cell++) << 32UL;
1761 addr += fdt32_to_cpu(*cell++);
1763 bd->bi_dram[bank].start = addr;
1765 *basep = (phys_addr_t)addr;
1768 if (size_cells == 2)
1769 size += (u64)fdt32_to_cpu(*cell++) << 32UL;
1770 size += fdt32_to_cpu(*cell++);
1775 debug("Auto-sizing %llx, size %llx: ", addr, size);
1776 new_size = get_ram_size((long *)(uintptr_t)addr, size);
1777 if (new_size == size) {
1780 debug("sized to %llx\n", new_size);
1786 bd->bi_dram[bank].size = size;
1790 debug("Memory size %llu\n", total_size);
1792 *sizep = (phys_size_t)total_size;
1797 #endif /* !USE_HOSTCC */