1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2011 The Chromium OS Authors.
10 #include <dm/of_extra.h>
13 #include <fdt_support.h>
15 #include <linux/libfdt.h>
17 #include <asm/sections.h>
18 #include <linux/ctype.h>
19 #include <linux/lzo.h>
21 DECLARE_GLOBAL_DATA_PTR;
24 * Here are the type we know about. One day we might allow drivers to
25 * register. For now we just put them here. The COMPAT macro allows us to
26 * turn this into a sparse list later, and keeps the ID with the name.
28 * NOTE: This list is basically a TODO list for things that need to be
29 * converted to driver model. So don't add new things here unless there is a
30 * good reason why driver-model conversion is infeasible. Examples include
31 * things which are used before driver model is available.
33 #define COMPAT(id, name) name
34 static const char * const compat_names[COMPAT_COUNT] = {
35 COMPAT(UNKNOWN, "<none>"),
36 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
37 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
38 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
39 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
40 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
41 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
42 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
43 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
44 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
45 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
46 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
47 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
48 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
49 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
50 COMPAT(INTEL_MICROCODE, "intel,microcode"),
51 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
52 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
53 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
54 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
55 COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
56 COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
57 COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
58 COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
59 COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
60 COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
61 COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
62 COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
63 COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
64 COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
65 COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
66 COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
67 COMPAT(ALTERA_SOCFPGA_FPGA0, "altr,socfpga-a10-fpga-mgr"),
68 COMPAT(ALTERA_SOCFPGA_NOC, "altr,socfpga-a10-noc"),
69 COMPAT(ALTERA_SOCFPGA_CLK_INIT, "altr,socfpga-a10-clk-init")
72 const char *fdtdec_get_compatible(enum fdt_compat_id id)
74 /* We allow reading of the 'unknown' ID for testing purposes */
75 assert(id >= 0 && id < COMPAT_COUNT);
76 return compat_names[id];
79 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
80 const char *prop_name, int index, int na,
81 int ns, fdt_size_t *sizep,
84 const fdt32_t *prop, *prop_end;
85 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
89 debug("%s: %s: ", __func__, prop_name);
91 prop = fdt_getprop(blob, node, prop_name, &len);
93 debug("(not found)\n");
94 return FDT_ADDR_T_NONE;
96 prop_end = prop + (len / sizeof(*prop));
98 prop_addr = prop + (index * (na + ns));
99 prop_size = prop_addr + na;
100 prop_after_size = prop_size + ns;
101 if (prop_after_size > prop_end) {
102 debug("(not enough data: expected >= %d cells, got %d cells)\n",
103 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
104 return FDT_ADDR_T_NONE;
107 #if CONFIG_IS_ENABLED(OF_TRANSLATE)
109 addr = fdt_translate_address(blob, node, prop_addr);
112 addr = fdtdec_get_number(prop_addr, na);
115 *sizep = fdtdec_get_number(prop_size, ns);
116 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
117 (unsigned long long)*sizep);
119 debug("addr=%08llx\n", (unsigned long long)addr);
125 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
126 int node, const char *prop_name,
127 int index, fdt_size_t *sizep,
132 debug("%s: ", __func__);
134 na = fdt_address_cells(blob, parent);
136 debug("(bad #address-cells)\n");
137 return FDT_ADDR_T_NONE;
140 ns = fdt_size_cells(blob, parent);
142 debug("(bad #size-cells)\n");
143 return FDT_ADDR_T_NONE;
146 debug("na=%d, ns=%d, ", na, ns);
148 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
149 ns, sizep, translate);
152 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
153 const char *prop_name, int index,
159 debug("%s: ", __func__);
161 parent = fdt_parent_offset(blob, node);
163 debug("(no parent found)\n");
164 return FDT_ADDR_T_NONE;
167 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
168 index, sizep, translate);
171 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
172 const char *prop_name, fdt_size_t *sizep)
174 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
176 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
177 sizeof(fdt_addr_t) / sizeof(fdt32_t),
181 fdt_addr_t fdtdec_get_addr(const void *blob, int node, const char *prop_name)
183 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
186 #if CONFIG_IS_ENABLED(PCI) && defined(CONFIG_DM_PCI)
187 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
188 const char *prop_name, struct fdt_pci_addr *addr)
194 debug("%s: %s: ", __func__, prop_name);
197 * If we follow the pci bus bindings strictly, we should check
198 * the value of the node's parent node's #address-cells and
199 * #size-cells. They need to be 3 and 2 accordingly. However,
200 * for simplicity we skip the check here.
202 cell = fdt_getprop(blob, node, prop_name, &len);
206 if ((len % FDT_PCI_REG_SIZE) == 0) {
207 int num = len / FDT_PCI_REG_SIZE;
210 for (i = 0; i < num; i++) {
211 debug("pci address #%d: %08lx %08lx %08lx\n", i,
212 (ulong)fdt32_to_cpu(cell[0]),
213 (ulong)fdt32_to_cpu(cell[1]),
214 (ulong)fdt32_to_cpu(cell[2]));
215 if ((fdt32_to_cpu(*cell) & type) == type) {
216 addr->phys_hi = fdt32_to_cpu(cell[0]);
217 addr->phys_mid = fdt32_to_cpu(cell[1]);
218 addr->phys_lo = fdt32_to_cpu(cell[1]);
222 cell += (FDT_PCI_ADDR_CELLS +
237 debug("(not found)\n");
241 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
243 const char *list, *end;
246 list = fdt_getprop(blob, node, "compatible", &len);
253 if (len >= strlen("pciVVVV,DDDD")) {
254 char *s = strstr(list, "pci");
257 * check if the string is something like pciVVVV,DDDD.RR
258 * or just pciVVVV,DDDD
260 if (s && s[7] == ',' &&
261 (s[12] == '.' || s[12] == 0)) {
263 *vendor = simple_strtol(s, NULL, 16);
266 *device = simple_strtol(s, NULL, 16);
277 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
282 /* extract the bar number from fdt_pci_addr */
283 barnum = addr->phys_hi & 0xff;
284 if (barnum < PCI_BASE_ADDRESS_0 || barnum > PCI_CARDBUS_CIS)
287 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
288 *bar = dm_pci_read_bar32(dev, barnum);
294 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
295 uint64_t default_val)
297 const uint64_t *cell64;
300 cell64 = fdt_getprop(blob, node, prop_name, &length);
301 if (!cell64 || length < sizeof(*cell64))
304 return fdt64_to_cpu(*cell64);
307 int fdtdec_get_is_enabled(const void *blob, int node)
312 * It should say "okay", so only allow that. Some fdts use "ok" but
313 * this is a bug. Please fix your device tree source file. See here
316 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
318 cell = fdt_getprop(blob, node, "status", NULL);
320 return strcmp(cell, "okay") == 0;
324 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
326 enum fdt_compat_id id;
328 /* Search our drivers */
329 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
330 if (fdt_node_check_compatible(blob, node,
331 compat_names[id]) == 0)
333 return COMPAT_UNKNOWN;
336 int fdtdec_next_compatible(const void *blob, int node, enum fdt_compat_id id)
338 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
341 int fdtdec_next_compatible_subnode(const void *blob, int node,
342 enum fdt_compat_id id, int *depthp)
345 node = fdt_next_node(blob, node, depthp);
346 } while (*depthp > 1);
348 /* If this is a direct subnode, and compatible, return it */
349 if (*depthp == 1 && 0 == fdt_node_check_compatible(
350 blob, node, compat_names[id]))
353 return -FDT_ERR_NOTFOUND;
356 int fdtdec_next_alias(const void *blob, const char *name, enum fdt_compat_id id,
359 #define MAX_STR_LEN 20
360 char str[MAX_STR_LEN + 20];
363 /* snprintf() is not available */
364 assert(strlen(name) < MAX_STR_LEN);
365 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
366 node = fdt_path_offset(blob, str);
369 err = fdt_node_check_compatible(blob, node, compat_names[id]);
373 return -FDT_ERR_NOTFOUND;
378 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
379 enum fdt_compat_id id, int *node_list,
382 memset(node_list, '\0', sizeof(*node_list) * maxcount);
384 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
387 /* TODO: Can we tighten this code up a little? */
388 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
389 enum fdt_compat_id id, int *node_list,
392 int name_len = strlen(name);
400 /* find the alias node if present */
401 alias_node = fdt_path_offset(blob, "/aliases");
404 * start with nothing, and we can assume that the root node can't
407 memset(nodes, '\0', sizeof(nodes));
409 /* First find all the compatible nodes */
410 for (node = count = 0; node >= 0 && count < maxcount;) {
411 node = fdtdec_next_compatible(blob, node, id);
413 nodes[count++] = node;
416 debug("%s: warning: maxcount exceeded with alias '%s'\n",
419 /* Now find all the aliases */
420 for (offset = fdt_first_property_offset(blob, alias_node);
422 offset = fdt_next_property_offset(blob, offset)) {
423 const struct fdt_property *prop;
429 prop = fdt_get_property_by_offset(blob, offset, NULL);
430 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
431 if (prop->len && 0 == strncmp(path, name, name_len))
432 node = fdt_path_offset(blob, prop->data);
436 /* Get the alias number */
437 number = simple_strtoul(path + name_len, NULL, 10);
438 if (number < 0 || number >= maxcount) {
439 debug("%s: warning: alias '%s' is out of range\n",
444 /* Make sure the node we found is actually in our list! */
446 for (j = 0; j < count; j++)
447 if (nodes[j] == node) {
453 debug("%s: warning: alias '%s' points to a node "
454 "'%s' that is missing or is not compatible "
455 " with '%s'\n", __func__, path,
456 fdt_get_name(blob, node, NULL),
462 * Add this node to our list in the right place, and mark
465 if (fdtdec_get_is_enabled(blob, node)) {
466 if (node_list[number]) {
467 debug("%s: warning: alias '%s' requires that "
468 "a node be placed in the list in a "
469 "position which is already filled by "
470 "node '%s'\n", __func__, path,
471 fdt_get_name(blob, node, NULL));
474 node_list[number] = node;
475 if (number >= num_found)
476 num_found = number + 1;
481 /* Add any nodes not mentioned by an alias */
482 for (i = j = 0; i < maxcount; i++) {
484 for (; j < maxcount; j++)
486 fdtdec_get_is_enabled(blob, nodes[j]))
489 /* Have we run out of nodes to add? */
493 assert(!node_list[i]);
494 node_list[i] = nodes[j++];
503 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
506 int base_len = strlen(base);
507 const char *find_name;
512 find_name = fdt_get_name(blob, offset, &find_namelen);
513 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
515 aliases = fdt_path_offset(blob, "/aliases");
516 for (prop_offset = fdt_first_property_offset(blob, aliases);
518 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
524 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
525 debug(" - %s, %s\n", name, prop);
526 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
527 strncmp(name, base, base_len))
530 slash = strrchr(prop, '/');
531 if (strcmp(slash + 1, find_name))
533 val = trailing_strtol(name);
536 debug("Found seq %d\n", *seqp);
541 debug("Not found\n");
545 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
551 chosen_node = fdt_path_offset(blob, "/chosen");
552 return fdt_getprop(blob, chosen_node, name, NULL);
555 int fdtdec_get_chosen_node(const void *blob, const char *name)
559 prop = fdtdec_get_chosen_prop(blob, name);
561 return -FDT_ERR_NOTFOUND;
562 return fdt_path_offset(blob, prop);
565 int fdtdec_check_fdt(void)
568 * We must have an FDT, but we cannot panic() yet since the console
569 * is not ready. So for now, just assert(). Boards which need an early
570 * FDT (prior to console ready) will need to make their own
571 * arrangements and do their own checks.
573 assert(!fdtdec_prepare_fdt());
578 * This function is a little odd in that it accesses global data. At some
579 * point if the architecture board.c files merge this will make more sense.
580 * Even now, it is common code.
582 int fdtdec_prepare_fdt(void)
584 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
585 fdt_check_header(gd->fdt_blob)) {
586 #ifdef CONFIG_SPL_BUILD
587 puts("Missing DTB\n");
589 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");
592 printf("fdt_blob=%p\n", gd->fdt_blob);
593 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
603 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
608 debug("%s: %s\n", __func__, prop_name);
609 phandle = fdt_getprop(blob, node, prop_name, NULL);
611 return -FDT_ERR_NOTFOUND;
613 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
618 * Look up a property in a node and check that it has a minimum length.
620 * @param blob FDT blob
621 * @param node node to examine
622 * @param prop_name name of property to find
623 * @param min_len minimum property length in bytes
624 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
625 found, or -FDT_ERR_BADLAYOUT if not enough data
626 * @return pointer to cell, which is only valid if err == 0
628 static const void *get_prop_check_min_len(const void *blob, int node,
629 const char *prop_name, int min_len,
635 debug("%s: %s\n", __func__, prop_name);
636 cell = fdt_getprop(blob, node, prop_name, &len);
638 *err = -FDT_ERR_NOTFOUND;
639 else if (len < min_len)
640 *err = -FDT_ERR_BADLAYOUT;
646 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
647 u32 *array, int count)
652 debug("%s: %s\n", __func__, prop_name);
653 cell = get_prop_check_min_len(blob, node, prop_name,
654 sizeof(u32) * count, &err);
658 for (i = 0; i < count; i++)
659 array[i] = fdt32_to_cpu(cell[i]);
664 int fdtdec_get_int_array_count(const void *blob, int node,
665 const char *prop_name, u32 *array, int count)
671 debug("%s: %s\n", __func__, prop_name);
672 cell = fdt_getprop(blob, node, prop_name, &len);
674 return -FDT_ERR_NOTFOUND;
675 elems = len / sizeof(u32);
678 for (i = 0; i < count; i++)
679 array[i] = fdt32_to_cpu(cell[i]);
684 const u32 *fdtdec_locate_array(const void *blob, int node,
685 const char *prop_name, int count)
690 cell = get_prop_check_min_len(blob, node, prop_name,
691 sizeof(u32) * count, &err);
692 return err ? NULL : cell;
695 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
700 debug("%s: %s\n", __func__, prop_name);
701 cell = fdt_getprop(blob, node, prop_name, &len);
705 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
706 const char *list_name,
707 const char *cells_name,
708 int cell_count, int index,
709 struct fdtdec_phandle_args *out_args)
711 const __be32 *list, *list_end;
712 int rc = 0, size, cur_index = 0;
717 /* Retrieve the phandle list property */
718 list = fdt_getprop(blob, src_node, list_name, &size);
721 list_end = list + size / sizeof(*list);
723 /* Loop over the phandles until all the requested entry is found */
724 while (list < list_end) {
729 * If phandle is 0, then it is an empty entry with no
730 * arguments. Skip forward to the next entry.
732 phandle = be32_to_cpup(list++);
735 * Find the provider node and parse the #*-cells
736 * property to determine the argument length.
738 * This is not needed if the cell count is hard-coded
739 * (i.e. cells_name not set, but cell_count is set),
740 * except when we're going to return the found node
743 if (cells_name || cur_index == index) {
744 node = fdt_node_offset_by_phandle(blob,
747 debug("%s: could not find phandle\n",
748 fdt_get_name(blob, src_node,
755 count = fdtdec_get_int(blob, node, cells_name,
758 debug("%s: could not get %s for %s\n",
759 fdt_get_name(blob, src_node,
762 fdt_get_name(blob, node,
771 * Make sure that the arguments actually fit in the
772 * remaining property data length
774 if (list + count > list_end) {
775 debug("%s: arguments longer than property\n",
776 fdt_get_name(blob, src_node, NULL));
782 * All of the error cases above bail out of the loop, so at
783 * this point, the parsing is successful. If the requested
784 * index matches, then fill the out_args structure and return,
785 * or return -ENOENT for an empty entry.
788 if (cur_index == index) {
795 if (count > MAX_PHANDLE_ARGS) {
796 debug("%s: too many arguments %d\n",
797 fdt_get_name(blob, src_node,
799 count = MAX_PHANDLE_ARGS;
801 out_args->node = node;
802 out_args->args_count = count;
803 for (i = 0; i < count; i++) {
805 be32_to_cpup(list++);
809 /* Found it! return success */
819 * Result will be one of:
820 * -ENOENT : index is for empty phandle
821 * -EINVAL : parsing error on data
822 * [1..n] : Number of phandle (count mode; when index = -1)
824 rc = index < 0 ? cur_index : -ENOENT;
829 int fdtdec_get_child_count(const void *blob, int node)
834 fdt_for_each_subnode(subnode, blob, node)
840 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
841 u8 *array, int count)
846 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
848 memcpy(array, cell, count);
852 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
853 const char *prop_name, int count)
858 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
864 int fdtdec_get_config_int(const void *blob, const char *prop_name,
869 debug("%s: %s\n", __func__, prop_name);
870 config_node = fdt_path_offset(blob, "/config");
873 return fdtdec_get_int(blob, config_node, prop_name, default_val);
876 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
881 debug("%s: %s\n", __func__, prop_name);
882 config_node = fdt_path_offset(blob, "/config");
885 prop = fdt_get_property(blob, config_node, prop_name, NULL);
890 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
896 debug("%s: %s\n", __func__, prop_name);
897 nodeoffset = fdt_path_offset(blob, "/config");
901 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
905 return (char *)nodep;
908 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
913 number = (number << 32) | fdt32_to_cpu(*ptr++);
918 int fdt_get_resource(const void *fdt, int node, const char *property,
919 unsigned int index, struct fdt_resource *res)
921 const fdt32_t *ptr, *end;
922 int na, ns, len, parent;
925 parent = fdt_parent_offset(fdt, node);
929 na = fdt_address_cells(fdt, parent);
930 ns = fdt_size_cells(fdt, parent);
932 ptr = fdt_getprop(fdt, node, property, &len);
936 end = ptr + len / sizeof(*ptr);
938 while (ptr + na + ns <= end) {
940 res->start = fdtdec_get_number(ptr, na);
941 res->end = res->start;
942 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
950 return -FDT_ERR_NOTFOUND;
953 int fdt_get_named_resource(const void *fdt, int node, const char *property,
954 const char *prop_names, const char *name,
955 struct fdt_resource *res)
959 index = fdt_stringlist_search(fdt, node, prop_names, name);
963 return fdt_get_resource(fdt, node, property, index, res);
966 static int decode_timing_property(const void *blob, int node, const char *name,
967 struct timing_entry *result)
972 prop = fdt_getprop(blob, node, name, &length);
974 debug("%s: could not find property %s\n",
975 fdt_get_name(blob, node, NULL), name);
979 if (length == sizeof(u32)) {
980 result->typ = fdtdec_get_int(blob, node, name, 0);
981 result->min = result->typ;
982 result->max = result->typ;
984 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
990 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
991 struct display_timing *dt)
993 int i, node, timings_node;
997 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
998 if (timings_node < 0)
1001 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1002 node > 0 && i != index;
1003 node = fdt_next_subnode(blob, node))
1009 memset(dt, 0, sizeof(*dt));
1011 ret |= decode_timing_property(blob, node, "hback-porch",
1013 ret |= decode_timing_property(blob, node, "hfront-porch",
1015 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1016 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1017 ret |= decode_timing_property(blob, node, "vback-porch",
1019 ret |= decode_timing_property(blob, node, "vfront-porch",
1021 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1022 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1023 ret |= decode_timing_property(blob, node, "clock-frequency",
1027 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1029 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1030 DISPLAY_FLAGS_VSYNC_LOW;
1032 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1034 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1035 DISPLAY_FLAGS_HSYNC_LOW;
1037 val = fdtdec_get_int(blob, node, "de-active", -1);
1039 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1040 DISPLAY_FLAGS_DE_LOW;
1042 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1044 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1045 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1048 if (fdtdec_get_bool(blob, node, "interlaced"))
1049 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1050 if (fdtdec_get_bool(blob, node, "doublescan"))
1051 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1052 if (fdtdec_get_bool(blob, node, "doubleclk"))
1053 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1058 int fdtdec_setup_mem_size_base(void)
1061 struct fdt_resource res;
1063 mem = fdt_path_offset(gd->fdt_blob, "/memory");
1065 debug("%s: Missing /memory node\n", __func__);
1069 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res);
1071 debug("%s: Unable to decode first memory bank\n", __func__);
1075 gd->ram_size = (phys_size_t)(res.end - res.start + 1);
1076 gd->ram_base = (unsigned long)res.start;
1077 debug("%s: Initial DRAM size %llx\n", __func__,
1078 (unsigned long long)gd->ram_size);
1083 #if defined(CONFIG_NR_DRAM_BANKS)
1085 static int get_next_memory_node(const void *blob, int mem)
1088 mem = fdt_node_offset_by_prop_value(gd->fdt_blob, mem,
1089 "device_type", "memory", 7);
1090 } while (!fdtdec_get_is_enabled(blob, mem));
1095 int fdtdec_setup_memory_banksize(void)
1097 int bank, ret, mem, reg = 0;
1098 struct fdt_resource res;
1100 mem = get_next_memory_node(gd->fdt_blob, -1);
1102 debug("%s: Missing /memory node\n", __func__);
1106 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1107 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
1108 if (ret == -FDT_ERR_NOTFOUND) {
1110 mem = get_next_memory_node(gd->fdt_blob, mem);
1111 if (mem == -FDT_ERR_NOTFOUND)
1114 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
1115 if (ret == -FDT_ERR_NOTFOUND)
1122 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
1123 gd->bd->bi_dram[bank].size =
1124 (phys_size_t)(res.end - res.start + 1);
1126 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
1128 (unsigned long long)gd->bd->bi_dram[bank].start,
1129 (unsigned long long)gd->bd->bi_dram[bank].size);
1136 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1137 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\
1138 CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO)
1139 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1141 size_t sz_out = CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ;
1142 ulong sz_in = sz_src;
1146 if (CONFIG_IS_ENABLED(GZIP))
1147 if (gzip_parse_header(src, sz_in) < 0)
1149 if (CONFIG_IS_ENABLED(LZO))
1150 if (!lzop_is_valid_header(src))
1153 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
1154 dst = malloc(sz_out);
1156 puts("uncompress_blob: Unable to allocate memory\n");
1160 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA)
1161 dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
1167 if (CONFIG_IS_ENABLED(GZIP))
1168 rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
1169 else if (CONFIG_IS_ENABLED(LZO))
1170 rc = lzop_decompress(src, sz_in, dst, &sz_out);
1173 /* not a valid compressed blob */
1174 puts("uncompress_blob: Unable to uncompress\n");
1175 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC))
1183 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1185 *dstp = (void *)src;
1191 #if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
1193 * For CONFIG_OF_SEPARATE, the board may optionally implement this to
1194 * provide and/or fixup the fdt.
1196 __weak void *board_fdt_blob_setup(void)
1198 void *fdt_blob = NULL;
1199 #ifdef CONFIG_SPL_BUILD
1200 /* FDT is at end of BSS unless it is in a different memory region */
1201 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1202 fdt_blob = (ulong *)&_image_binary_end;
1204 fdt_blob = (ulong *)&__bss_end;
1206 /* FDT is at end of image */
1207 fdt_blob = (ulong *)&_end;
1213 int fdtdec_setup(void)
1215 #if CONFIG_IS_ENABLED(OF_CONTROL)
1216 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1219 # ifdef CONFIG_OF_EMBED
1220 /* Get a pointer to the FDT */
1221 # ifdef CONFIG_SPL_BUILD
1222 gd->fdt_blob = __dtb_dt_spl_begin;
1224 gd->fdt_blob = __dtb_dt_begin;
1226 # elif defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
1227 /* Allow the board to override the fdt address. */
1228 gd->fdt_blob = board_fdt_blob_setup();
1229 # elif defined(CONFIG_OF_HOSTFILE)
1230 if (sandbox_read_fdt_from_file()) {
1231 puts("Failed to read control FDT\n");
1235 # ifndef CONFIG_SPL_BUILD
1236 /* Allow the early environment to override the fdt address */
1237 # if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
1238 gd->fdt_blob = (void *)prior_stage_fdt_address;
1240 gd->fdt_blob = map_sysmem
1241 (env_get_ulong("fdtcontroladdr", 16,
1242 (unsigned long)map_to_sysmem(gd->fdt_blob)), 0);
1246 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1248 * Try and uncompress the blob.
1249 * Unfortunately there is no way to know how big the input blob really
1250 * is. So let us set the maximum input size arbitrarily high. 16MB
1251 * ought to be more than enough for packed DTBs.
1253 if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0)
1254 gd->fdt_blob = fdt_blob;
1257 * Check if blob is a FIT images containings DTBs.
1258 * If so, pick the most relevant
1260 fdt_blob = locate_dtb_in_fit(gd->fdt_blob);
1262 gd->multi_dtb_fit = gd->fdt_blob;
1263 gd->fdt_blob = fdt_blob;
1269 return fdtdec_prepare_fdt();
1272 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1273 int fdtdec_resetup(int *rescan)
1278 * If the current DTB is part of a compressed FIT image,
1279 * try to locate the best match from the uncompressed
1280 * FIT image stillpresent there. Save the time and space
1281 * required to uncompress it again.
1283 if (gd->multi_dtb_fit) {
1284 fdt_blob = locate_dtb_in_fit(gd->multi_dtb_fit);
1286 if (fdt_blob == gd->fdt_blob) {
1288 * The best match did not change. no need to tear down
1289 * the DM and rescan the fdt.
1296 gd->fdt_blob = fdt_blob;
1297 return fdtdec_prepare_fdt();
1301 * If multi_dtb_fit is NULL, it means that blob appended to u-boot is
1302 * not a FIT image containings DTB, but a single DTB. There is no need
1303 * to teard down DM and rescan the DT in this case.
1310 #ifdef CONFIG_NR_DRAM_BANKS
1311 int fdtdec_decode_ram_size(const void *blob, const char *area, int board_id,
1312 phys_addr_t *basep, phys_size_t *sizep, bd_t *bd)
1314 int addr_cells, size_cells;
1315 const u32 *cell, *end;
1316 u64 total_size, size, addr;
1322 debug("%s: board_id=%d\n", __func__, board_id);
1325 node = fdt_path_offset(blob, area);
1327 debug("No %s node found\n", area);
1331 cell = fdt_getprop(blob, node, "reg", &len);
1333 debug("No reg property found\n");
1337 addr_cells = fdt_address_cells(blob, node);
1338 size_cells = fdt_size_cells(blob, node);
1340 /* Check the board id and mask */
1341 for (child = fdt_first_subnode(blob, node);
1343 child = fdt_next_subnode(blob, child)) {
1344 int match_mask, match_value;
1346 match_mask = fdtdec_get_int(blob, child, "match-mask", -1);
1347 match_value = fdtdec_get_int(blob, child, "match-value", -1);
1349 if (match_value >= 0 &&
1350 ((board_id & match_mask) == match_value)) {
1351 /* Found matching mask */
1352 debug("Found matching mask %d\n", match_mask);
1354 cell = fdt_getprop(blob, node, "reg", &len);
1356 debug("No memory-banks property found\n");
1362 /* Note: if no matching subnode was found we use the parent node */
1365 memset(bd->bi_dram, '\0', sizeof(bd->bi_dram[0]) *
1366 CONFIG_NR_DRAM_BANKS);
1369 auto_size = fdtdec_get_bool(blob, node, "auto-size");
1372 end = cell + len / 4 - addr_cells - size_cells;
1373 debug("cell at %p, end %p\n", cell, end);
1374 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1378 if (addr_cells == 2)
1379 addr += (u64)fdt32_to_cpu(*cell++) << 32UL;
1380 addr += fdt32_to_cpu(*cell++);
1382 bd->bi_dram[bank].start = addr;
1384 *basep = (phys_addr_t)addr;
1387 if (size_cells == 2)
1388 size += (u64)fdt32_to_cpu(*cell++) << 32UL;
1389 size += fdt32_to_cpu(*cell++);
1394 debug("Auto-sizing %llx, size %llx: ", addr, size);
1395 new_size = get_ram_size((long *)(uintptr_t)addr, size);
1396 if (new_size == size) {
1399 debug("sized to %llx\n", new_size);
1405 bd->bi_dram[bank].size = size;
1409 debug("Memory size %llu\n", total_size);
1411 *sizep = (phys_size_t)total_size;
1415 #endif /* CONFIG_NR_DRAM_BANKS */
1417 #endif /* !USE_HOSTCC */