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>
14 #include <linux/libfdt.h>
16 #include <asm/sections.h>
17 #include <linux/ctype.h>
18 #include <linux/lzo.h>
20 DECLARE_GLOBAL_DATA_PTR;
23 * Here are the type we know about. One day we might allow drivers to
24 * register. For now we just put them here. The COMPAT macro allows us to
25 * turn this into a sparse list later, and keeps the ID with the name.
27 * NOTE: This list is basically a TODO list for things that need to be
28 * converted to driver model. So don't add new things here unless there is a
29 * good reason why driver-model conversion is infeasible. Examples include
30 * things which are used before driver model is available.
32 #define COMPAT(id, name) name
33 static const char * const compat_names[COMPAT_COUNT] = {
34 COMPAT(UNKNOWN, "<none>"),
35 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
36 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
37 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
38 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
39 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
40 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
41 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
42 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
43 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
44 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
45 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
46 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
47 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
48 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
49 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
50 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
51 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
52 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
53 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
54 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
55 COMPAT(INTEL_MICROCODE, "intel,microcode"),
56 COMPAT(AMS_AS3722, "ams,as3722"),
57 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
58 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
59 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
60 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
61 COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
62 COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
63 COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
64 COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
65 COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
66 COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
67 COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
68 COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
69 COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
70 COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
71 COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
72 COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
73 COMPAT(ALTERA_SOCFPGA_FPGA0, "altr,socfpga-a10-fpga-mgr"),
74 COMPAT(ALTERA_SOCFPGA_NOC, "altr,socfpga-a10-noc"),
77 const char *fdtdec_get_compatible(enum fdt_compat_id id)
79 /* We allow reading of the 'unknown' ID for testing purposes */
80 assert(id >= 0 && id < COMPAT_COUNT);
81 return compat_names[id];
84 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
85 const char *prop_name, int index, int na,
86 int ns, fdt_size_t *sizep,
89 const fdt32_t *prop, *prop_end;
90 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
94 debug("%s: %s: ", __func__, prop_name);
96 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
97 debug("(na too large for fdt_addr_t type)\n");
98 return FDT_ADDR_T_NONE;
101 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
102 debug("(ns too large for fdt_size_t type)\n");
103 return FDT_ADDR_T_NONE;
106 prop = fdt_getprop(blob, node, prop_name, &len);
108 debug("(not found)\n");
109 return FDT_ADDR_T_NONE;
111 prop_end = prop + (len / sizeof(*prop));
113 prop_addr = prop + (index * (na + ns));
114 prop_size = prop_addr + na;
115 prop_after_size = prop_size + ns;
116 if (prop_after_size > prop_end) {
117 debug("(not enough data: expected >= %d cells, got %d cells)\n",
118 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
119 return FDT_ADDR_T_NONE;
122 #if CONFIG_IS_ENABLED(OF_TRANSLATE)
124 addr = fdt_translate_address(blob, node, prop_addr);
127 addr = fdtdec_get_number(prop_addr, na);
130 *sizep = fdtdec_get_number(prop_size, ns);
131 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
132 (unsigned long long)*sizep);
134 debug("addr=%08llx\n", (unsigned long long)addr);
140 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
141 int node, const char *prop_name,
142 int index, fdt_size_t *sizep,
147 debug("%s: ", __func__);
149 na = fdt_address_cells(blob, parent);
151 debug("(bad #address-cells)\n");
152 return FDT_ADDR_T_NONE;
155 ns = fdt_size_cells(blob, parent);
157 debug("(bad #size-cells)\n");
158 return FDT_ADDR_T_NONE;
161 debug("na=%d, ns=%d, ", na, ns);
163 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
164 ns, sizep, translate);
167 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
168 const char *prop_name, int index,
174 debug("%s: ", __func__);
176 parent = fdt_parent_offset(blob, node);
178 debug("(no parent found)\n");
179 return FDT_ADDR_T_NONE;
182 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
183 index, sizep, translate);
186 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
187 const char *prop_name, fdt_size_t *sizep)
189 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
191 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
192 sizeof(fdt_addr_t) / sizeof(fdt32_t),
196 fdt_addr_t fdtdec_get_addr(const void *blob, int node, const char *prop_name)
198 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
201 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
202 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
203 const char *prop_name, struct fdt_pci_addr *addr)
209 debug("%s: %s: ", __func__, prop_name);
212 * If we follow the pci bus bindings strictly, we should check
213 * the value of the node's parent node's #address-cells and
214 * #size-cells. They need to be 3 and 2 accordingly. However,
215 * for simplicity we skip the check here.
217 cell = fdt_getprop(blob, node, prop_name, &len);
221 if ((len % FDT_PCI_REG_SIZE) == 0) {
222 int num = len / FDT_PCI_REG_SIZE;
225 for (i = 0; i < num; i++) {
226 debug("pci address #%d: %08lx %08lx %08lx\n", i,
227 (ulong)fdt32_to_cpu(cell[0]),
228 (ulong)fdt32_to_cpu(cell[1]),
229 (ulong)fdt32_to_cpu(cell[2]));
230 if ((fdt32_to_cpu(*cell) & type) == type) {
231 addr->phys_hi = fdt32_to_cpu(cell[0]);
232 addr->phys_mid = fdt32_to_cpu(cell[1]);
233 addr->phys_lo = fdt32_to_cpu(cell[1]);
237 cell += (FDT_PCI_ADDR_CELLS +
252 debug("(not found)\n");
256 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
258 const char *list, *end;
261 list = fdt_getprop(blob, node, "compatible", &len);
268 if (len >= strlen("pciVVVV,DDDD")) {
269 char *s = strstr(list, "pci");
272 * check if the string is something like pciVVVV,DDDD.RR
273 * or just pciVVVV,DDDD
275 if (s && s[7] == ',' &&
276 (s[12] == '.' || s[12] == 0)) {
278 *vendor = simple_strtol(s, NULL, 16);
281 *device = simple_strtol(s, NULL, 16);
292 int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
297 /* extract the bar number from fdt_pci_addr */
298 barnum = addr->phys_hi & 0xff;
299 if (barnum < PCI_BASE_ADDRESS_0 || barnum > PCI_CARDBUS_CIS)
302 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
303 *bar = dm_pci_read_bar32(dev, barnum);
309 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
310 uint64_t default_val)
312 const uint64_t *cell64;
315 cell64 = fdt_getprop(blob, node, prop_name, &length);
316 if (!cell64 || length < sizeof(*cell64))
319 return fdt64_to_cpu(*cell64);
322 int fdtdec_get_is_enabled(const void *blob, int node)
327 * It should say "okay", so only allow that. Some fdts use "ok" but
328 * this is a bug. Please fix your device tree source file. See here
331 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
333 cell = fdt_getprop(blob, node, "status", NULL);
335 return strcmp(cell, "okay") == 0;
339 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
341 enum fdt_compat_id id;
343 /* Search our drivers */
344 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
345 if (fdt_node_check_compatible(blob, node,
346 compat_names[id]) == 0)
348 return COMPAT_UNKNOWN;
351 int fdtdec_next_compatible(const void *blob, int node, enum fdt_compat_id id)
353 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
356 int fdtdec_next_compatible_subnode(const void *blob, int node,
357 enum fdt_compat_id id, int *depthp)
360 node = fdt_next_node(blob, node, depthp);
361 } while (*depthp > 1);
363 /* If this is a direct subnode, and compatible, return it */
364 if (*depthp == 1 && 0 == fdt_node_check_compatible(
365 blob, node, compat_names[id]))
368 return -FDT_ERR_NOTFOUND;
371 int fdtdec_next_alias(const void *blob, const char *name, enum fdt_compat_id id,
374 #define MAX_STR_LEN 20
375 char str[MAX_STR_LEN + 20];
378 /* snprintf() is not available */
379 assert(strlen(name) < MAX_STR_LEN);
380 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
381 node = fdt_path_offset(blob, str);
384 err = fdt_node_check_compatible(blob, node, compat_names[id]);
388 return -FDT_ERR_NOTFOUND;
393 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
394 enum fdt_compat_id id, int *node_list,
397 memset(node_list, '\0', sizeof(*node_list) * maxcount);
399 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
402 /* TODO: Can we tighten this code up a little? */
403 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
404 enum fdt_compat_id id, int *node_list,
407 int name_len = strlen(name);
415 /* find the alias node if present */
416 alias_node = fdt_path_offset(blob, "/aliases");
419 * start with nothing, and we can assume that the root node can't
422 memset(nodes, '\0', sizeof(nodes));
424 /* First find all the compatible nodes */
425 for (node = count = 0; node >= 0 && count < maxcount;) {
426 node = fdtdec_next_compatible(blob, node, id);
428 nodes[count++] = node;
431 debug("%s: warning: maxcount exceeded with alias '%s'\n",
434 /* Now find all the aliases */
435 for (offset = fdt_first_property_offset(blob, alias_node);
437 offset = fdt_next_property_offset(blob, offset)) {
438 const struct fdt_property *prop;
444 prop = fdt_get_property_by_offset(blob, offset, NULL);
445 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
446 if (prop->len && 0 == strncmp(path, name, name_len))
447 node = fdt_path_offset(blob, prop->data);
451 /* Get the alias number */
452 number = simple_strtoul(path + name_len, NULL, 10);
453 if (number < 0 || number >= maxcount) {
454 debug("%s: warning: alias '%s' is out of range\n",
459 /* Make sure the node we found is actually in our list! */
461 for (j = 0; j < count; j++)
462 if (nodes[j] == node) {
468 debug("%s: warning: alias '%s' points to a node "
469 "'%s' that is missing or is not compatible "
470 " with '%s'\n", __func__, path,
471 fdt_get_name(blob, node, NULL),
477 * Add this node to our list in the right place, and mark
480 if (fdtdec_get_is_enabled(blob, node)) {
481 if (node_list[number]) {
482 debug("%s: warning: alias '%s' requires that "
483 "a node be placed in the list in a "
484 "position which is already filled by "
485 "node '%s'\n", __func__, path,
486 fdt_get_name(blob, node, NULL));
489 node_list[number] = node;
490 if (number >= num_found)
491 num_found = number + 1;
496 /* Add any nodes not mentioned by an alias */
497 for (i = j = 0; i < maxcount; i++) {
499 for (; j < maxcount; j++)
501 fdtdec_get_is_enabled(blob, nodes[j]))
504 /* Have we run out of nodes to add? */
508 assert(!node_list[i]);
509 node_list[i] = nodes[j++];
518 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
521 int base_len = strlen(base);
522 const char *find_name;
527 find_name = fdt_get_name(blob, offset, &find_namelen);
528 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
530 aliases = fdt_path_offset(blob, "/aliases");
531 for (prop_offset = fdt_first_property_offset(blob, aliases);
533 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
539 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
540 debug(" - %s, %s\n", name, prop);
541 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
542 strncmp(name, base, base_len))
545 slash = strrchr(prop, '/');
546 if (strcmp(slash + 1, find_name))
548 val = trailing_strtol(name);
551 debug("Found seq %d\n", *seqp);
556 debug("Not found\n");
560 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
566 chosen_node = fdt_path_offset(blob, "/chosen");
567 return fdt_getprop(blob, chosen_node, name, NULL);
570 int fdtdec_get_chosen_node(const void *blob, const char *name)
574 prop = fdtdec_get_chosen_prop(blob, name);
576 return -FDT_ERR_NOTFOUND;
577 return fdt_path_offset(blob, prop);
580 int fdtdec_check_fdt(void)
583 * We must have an FDT, but we cannot panic() yet since the console
584 * is not ready. So for now, just assert(). Boards which need an early
585 * FDT (prior to console ready) will need to make their own
586 * arrangements and do their own checks.
588 assert(!fdtdec_prepare_fdt());
593 * This function is a little odd in that it accesses global data. At some
594 * point if the architecture board.c files merge this will make more sense.
595 * Even now, it is common code.
597 int fdtdec_prepare_fdt(void)
599 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
600 fdt_check_header(gd->fdt_blob)) {
601 #ifdef CONFIG_SPL_BUILD
602 puts("Missing DTB\n");
604 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");
607 printf("fdt_blob=%p\n", gd->fdt_blob);
608 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
618 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
623 debug("%s: %s\n", __func__, prop_name);
624 phandle = fdt_getprop(blob, node, prop_name, NULL);
626 return -FDT_ERR_NOTFOUND;
628 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
633 * Look up a property in a node and check that it has a minimum length.
635 * @param blob FDT blob
636 * @param node node to examine
637 * @param prop_name name of property to find
638 * @param min_len minimum property length in bytes
639 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
640 found, or -FDT_ERR_BADLAYOUT if not enough data
641 * @return pointer to cell, which is only valid if err == 0
643 static const void *get_prop_check_min_len(const void *blob, int node,
644 const char *prop_name, int min_len,
650 debug("%s: %s\n", __func__, prop_name);
651 cell = fdt_getprop(blob, node, prop_name, &len);
653 *err = -FDT_ERR_NOTFOUND;
654 else if (len < min_len)
655 *err = -FDT_ERR_BADLAYOUT;
661 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
662 u32 *array, int count)
667 debug("%s: %s\n", __func__, prop_name);
668 cell = get_prop_check_min_len(blob, node, prop_name,
669 sizeof(u32) * count, &err);
673 for (i = 0; i < count; i++)
674 array[i] = fdt32_to_cpu(cell[i]);
679 int fdtdec_get_int_array_count(const void *blob, int node,
680 const char *prop_name, u32 *array, int count)
686 debug("%s: %s\n", __func__, prop_name);
687 cell = fdt_getprop(blob, node, prop_name, &len);
689 return -FDT_ERR_NOTFOUND;
690 elems = len / sizeof(u32);
693 for (i = 0; i < count; i++)
694 array[i] = fdt32_to_cpu(cell[i]);
699 const u32 *fdtdec_locate_array(const void *blob, int node,
700 const char *prop_name, int count)
705 cell = get_prop_check_min_len(blob, node, prop_name,
706 sizeof(u32) * count, &err);
707 return err ? NULL : cell;
710 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
715 debug("%s: %s\n", __func__, prop_name);
716 cell = fdt_getprop(blob, node, prop_name, &len);
720 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
721 const char *list_name,
722 const char *cells_name,
723 int cell_count, int index,
724 struct fdtdec_phandle_args *out_args)
726 const __be32 *list, *list_end;
727 int rc = 0, size, cur_index = 0;
732 /* Retrieve the phandle list property */
733 list = fdt_getprop(blob, src_node, list_name, &size);
736 list_end = list + size / sizeof(*list);
738 /* Loop over the phandles until all the requested entry is found */
739 while (list < list_end) {
744 * If phandle is 0, then it is an empty entry with no
745 * arguments. Skip forward to the next entry.
747 phandle = be32_to_cpup(list++);
750 * Find the provider node and parse the #*-cells
751 * property to determine the argument length.
753 * This is not needed if the cell count is hard-coded
754 * (i.e. cells_name not set, but cell_count is set),
755 * except when we're going to return the found node
758 if (cells_name || cur_index == index) {
759 node = fdt_node_offset_by_phandle(blob,
762 debug("%s: could not find phandle\n",
763 fdt_get_name(blob, src_node,
770 count = fdtdec_get_int(blob, node, cells_name,
773 debug("%s: could not get %s for %s\n",
774 fdt_get_name(blob, src_node,
777 fdt_get_name(blob, node,
786 * Make sure that the arguments actually fit in the
787 * remaining property data length
789 if (list + count > list_end) {
790 debug("%s: arguments longer than property\n",
791 fdt_get_name(blob, src_node, NULL));
797 * All of the error cases above bail out of the loop, so at
798 * this point, the parsing is successful. If the requested
799 * index matches, then fill the out_args structure and return,
800 * or return -ENOENT for an empty entry.
803 if (cur_index == index) {
810 if (count > MAX_PHANDLE_ARGS) {
811 debug("%s: too many arguments %d\n",
812 fdt_get_name(blob, src_node,
814 count = MAX_PHANDLE_ARGS;
816 out_args->node = node;
817 out_args->args_count = count;
818 for (i = 0; i < count; i++) {
820 be32_to_cpup(list++);
824 /* Found it! return success */
834 * Result will be one of:
835 * -ENOENT : index is for empty phandle
836 * -EINVAL : parsing error on data
837 * [1..n] : Number of phandle (count mode; when index = -1)
839 rc = index < 0 ? cur_index : -ENOENT;
844 int fdtdec_get_child_count(const void *blob, int node)
849 fdt_for_each_subnode(subnode, blob, node)
855 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
856 u8 *array, int count)
861 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
863 memcpy(array, cell, count);
867 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
868 const char *prop_name, int count)
873 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
879 int fdtdec_get_config_int(const void *blob, const char *prop_name,
884 debug("%s: %s\n", __func__, prop_name);
885 config_node = fdt_path_offset(blob, "/config");
888 return fdtdec_get_int(blob, config_node, prop_name, default_val);
891 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
896 debug("%s: %s\n", __func__, prop_name);
897 config_node = fdt_path_offset(blob, "/config");
900 prop = fdt_get_property(blob, config_node, prop_name, NULL);
905 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
911 debug("%s: %s\n", __func__, prop_name);
912 nodeoffset = fdt_path_offset(blob, "/config");
916 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
920 return (char *)nodep;
923 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
924 fdt_addr_t *basep, fdt_size_t *sizep)
926 const fdt_addr_t *cell;
929 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
931 cell = fdt_getprop(blob, node, prop_name, &len);
932 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
933 debug("cell=%p, len=%d\n", cell, len);
937 *basep = fdt_addr_to_cpu(*cell);
938 *sizep = fdt_size_to_cpu(cell[1]);
939 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
945 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
950 number = (number << 32) | fdt32_to_cpu(*ptr++);
955 int fdt_get_resource(const void *fdt, int node, const char *property,
956 unsigned int index, struct fdt_resource *res)
958 const fdt32_t *ptr, *end;
959 int na, ns, len, parent;
962 parent = fdt_parent_offset(fdt, node);
966 na = fdt_address_cells(fdt, parent);
967 ns = fdt_size_cells(fdt, parent);
969 ptr = fdt_getprop(fdt, node, property, &len);
973 end = ptr + len / sizeof(*ptr);
975 while (ptr + na + ns <= end) {
977 res->start = fdtdec_get_number(ptr, na);
978 res->end = res->start;
979 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
987 return -FDT_ERR_NOTFOUND;
990 int fdt_get_named_resource(const void *fdt, int node, const char *property,
991 const char *prop_names, const char *name,
992 struct fdt_resource *res)
996 index = fdt_stringlist_search(fdt, node, prop_names, name);
1000 return fdt_get_resource(fdt, node, property, index, res);
1003 int fdtdec_decode_memory_region(const void *blob, int config_node,
1004 const char *mem_type, const char *suffix,
1005 fdt_addr_t *basep, fdt_size_t *sizep)
1009 fdt_size_t size, offset_size;
1010 fdt_addr_t base, offset;
1013 if (config_node == -1) {
1014 config_node = fdt_path_offset(blob, "/config");
1015 if (config_node < 0) {
1016 debug("%s: Cannot find /config node\n", __func__);
1023 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1025 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1027 debug("%s: No memory type for '%s', using /memory\n", __func__,
1032 node = fdt_path_offset(blob, mem);
1034 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1035 fdt_strerror(node));
1040 * Not strictly correct - the memory may have multiple banks. We just
1043 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1044 debug("%s: Failed to decode memory region %s\n", __func__,
1049 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1051 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1053 debug("%s: Failed to decode memory region '%s'\n", __func__,
1058 *basep = base + offset;
1059 *sizep = offset_size;
1064 static int decode_timing_property(const void *blob, int node, const char *name,
1065 struct timing_entry *result)
1067 int length, ret = 0;
1070 prop = fdt_getprop(blob, node, name, &length);
1072 debug("%s: could not find property %s\n",
1073 fdt_get_name(blob, node, NULL), name);
1077 if (length == sizeof(u32)) {
1078 result->typ = fdtdec_get_int(blob, node, name, 0);
1079 result->min = result->typ;
1080 result->max = result->typ;
1082 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1088 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1089 struct display_timing *dt)
1091 int i, node, timings_node;
1095 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1096 if (timings_node < 0)
1097 return timings_node;
1099 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1100 node > 0 && i != index;
1101 node = fdt_next_subnode(blob, node))
1107 memset(dt, 0, sizeof(*dt));
1109 ret |= decode_timing_property(blob, node, "hback-porch",
1111 ret |= decode_timing_property(blob, node, "hfront-porch",
1113 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1114 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1115 ret |= decode_timing_property(blob, node, "vback-porch",
1117 ret |= decode_timing_property(blob, node, "vfront-porch",
1119 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1120 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1121 ret |= decode_timing_property(blob, node, "clock-frequency",
1125 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1127 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1128 DISPLAY_FLAGS_VSYNC_LOW;
1130 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1132 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1133 DISPLAY_FLAGS_HSYNC_LOW;
1135 val = fdtdec_get_int(blob, node, "de-active", -1);
1137 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1138 DISPLAY_FLAGS_DE_LOW;
1140 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1142 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1143 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1146 if (fdtdec_get_bool(blob, node, "interlaced"))
1147 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1148 if (fdtdec_get_bool(blob, node, "doublescan"))
1149 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1150 if (fdtdec_get_bool(blob, node, "doubleclk"))
1151 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1156 int fdtdec_setup_memory_size(void)
1159 struct fdt_resource res;
1161 mem = fdt_path_offset(gd->fdt_blob, "/memory");
1163 debug("%s: Missing /memory node\n", __func__);
1167 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res);
1169 debug("%s: Unable to decode first memory bank\n", __func__);
1173 gd->ram_size = (phys_size_t)(res.end - res.start + 1);
1174 debug("%s: Initial DRAM size %llx\n", __func__,
1175 (unsigned long long)gd->ram_size);
1180 #if defined(CONFIG_NR_DRAM_BANKS)
1181 int fdtdec_setup_memory_banksize(void)
1183 int bank, ret, mem, reg = 0;
1184 struct fdt_resource res;
1186 mem = fdt_node_offset_by_prop_value(gd->fdt_blob, -1, "device_type",
1189 debug("%s: Missing /memory node\n", __func__);
1193 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1194 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
1195 if (ret == -FDT_ERR_NOTFOUND) {
1197 mem = fdt_node_offset_by_prop_value(gd->fdt_blob, mem,
1200 if (mem == -FDT_ERR_NOTFOUND)
1203 ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
1204 if (ret == -FDT_ERR_NOTFOUND)
1211 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
1212 gd->bd->bi_dram[bank].size =
1213 (phys_size_t)(res.end - res.start + 1);
1215 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
1217 (unsigned long long)gd->bd->bi_dram[bank].start,
1218 (unsigned long long)gd->bd->bi_dram[bank].size);
1225 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1226 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\
1227 CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO)
1228 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1230 size_t sz_out = CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ;
1231 ulong sz_in = sz_src;
1235 if (CONFIG_IS_ENABLED(GZIP))
1236 if (gzip_parse_header(src, sz_in) < 0)
1238 if (CONFIG_IS_ENABLED(LZO))
1239 if (!lzop_is_valid_header(src))
1242 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
1243 dst = malloc(sz_out);
1245 puts("uncompress_blob: Unable to allocate memory\n");
1249 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA)
1250 dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
1256 if (CONFIG_IS_ENABLED(GZIP))
1257 rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
1258 else if (CONFIG_IS_ENABLED(LZO))
1259 rc = lzop_decompress(src, sz_in, dst, &sz_out);
1262 /* not a valid compressed blob */
1263 puts("uncompress_blob: Unable to uncompress\n");
1264 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC))
1272 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1279 #if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
1281 * For CONFIG_OF_SEPARATE, the board may optionally implement this to
1282 * provide and/or fixup the fdt.
1284 __weak void *board_fdt_blob_setup(void)
1286 void *fdt_blob = NULL;
1287 #ifdef CONFIG_SPL_BUILD
1288 /* FDT is at end of BSS unless it is in a different memory region */
1289 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1290 fdt_blob = (ulong *)&_image_binary_end;
1292 fdt_blob = (ulong *)&__bss_end;
1294 /* FDT is at end of image */
1295 fdt_blob = (ulong *)&_end;
1301 int fdtdec_setup(void)
1303 #if CONFIG_IS_ENABLED(OF_CONTROL)
1304 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1307 # ifdef CONFIG_OF_EMBED
1308 /* Get a pointer to the FDT */
1309 # ifdef CONFIG_SPL_BUILD
1310 gd->fdt_blob = __dtb_dt_spl_begin;
1312 gd->fdt_blob = __dtb_dt_begin;
1314 # elif defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
1315 /* Allow the board to override the fdt address. */
1316 gd->fdt_blob = board_fdt_blob_setup();
1317 # elif defined(CONFIG_OF_HOSTFILE)
1318 if (sandbox_read_fdt_from_file()) {
1319 puts("Failed to read control FDT\n");
1323 # ifndef CONFIG_SPL_BUILD
1324 /* Allow the early environment to override the fdt address */
1325 gd->fdt_blob = (void *)env_get_ulong("fdtcontroladdr", 16,
1326 (uintptr_t)gd->fdt_blob);
1329 # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
1331 * Try and uncompress the blob.
1332 * Unfortunately there is no way to know how big the input blob really
1333 * is. So let us set the maximum input size arbitrarily high. 16MB
1334 * ought to be more than enough for packed DTBs.
1336 if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0)
1337 gd->fdt_blob = fdt_blob;
1340 * Check if blob is a FIT images containings DTBs.
1341 * If so, pick the most relevant
1343 fdt_blob = locate_dtb_in_fit(gd->fdt_blob);
1345 gd->fdt_blob = fdt_blob;
1349 return fdtdec_prepare_fdt();
1352 #endif /* !USE_HOSTCC */