2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/sections.h>
13 #include <linux/ctype.h>
15 DECLARE_GLOBAL_DATA_PTR;
18 * Here are the type we know about. One day we might allow drivers to
19 * register. For now we just put them here. The COMPAT macro allows us to
20 * turn this into a sparse list later, and keeps the ID with the name.
22 #define COMPAT(id, name) name
23 static const char * const compat_names[COMPAT_COUNT] = {
24 COMPAT(UNKNOWN, "<none>"),
25 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
26 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
27 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
28 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
29 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"),
30 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"),
31 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
32 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
33 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
34 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
35 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
36 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
37 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
38 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
39 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
40 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
41 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
42 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
43 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
44 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
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_FIMD, "samsung,exynos-fimd"),
49 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
50 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
51 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
52 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
53 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
54 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
55 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
56 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
57 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
58 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
59 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
60 COMPAT(INTEL_MICROCODE, "intel,microcode"),
61 COMPAT(MEMORY_SPD, "memory-spd"),
62 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
63 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
64 COMPAT(INTEL_GMA, "intel,gma"),
65 COMPAT(AMS_AS3722, "ams,as3722"),
66 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
67 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
68 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"),
69 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
70 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
71 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
72 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
73 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
74 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
75 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
76 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
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, int ns,
90 const fdt32_t *prop, *prop_end;
91 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
95 debug("%s: %s: ", __func__, prop_name);
97 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
98 debug("(na too large for fdt_addr_t type)\n");
99 return FDT_ADDR_T_NONE;
102 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
103 debug("(ns too large for fdt_size_t type)\n");
104 return FDT_ADDR_T_NONE;
107 prop = fdt_getprop(blob, node, prop_name, &len);
109 debug("(not found)\n");
110 return FDT_ADDR_T_NONE;
112 prop_end = prop + (len / sizeof(*prop));
114 prop_addr = prop + (index * (na + ns));
115 prop_size = prop_addr + na;
116 prop_after_size = prop_size + ns;
117 if (prop_after_size > prop_end) {
118 debug("(not enough data: expected >= %d cells, got %d cells)\n",
119 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
120 return FDT_ADDR_T_NONE;
123 addr = fdtdec_get_number(prop_addr, na);
126 *sizep = fdtdec_get_number(prop_size, ns);
127 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep);
129 debug("addr=%08llx\n", (u64)addr);
135 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
136 int node, const char *prop_name, int index, fdt_size_t *sizep)
140 debug("%s: ", __func__);
142 na = fdt_address_cells(blob, parent);
144 debug("(bad #address-cells)\n");
145 return FDT_ADDR_T_NONE;
148 ns = fdt_size_cells(blob, parent);
150 debug("(bad #size-cells)\n");
151 return FDT_ADDR_T_NONE;
154 debug("na=%d, ns=%d, ", na, ns);
156 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
160 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
161 const char *prop_name, int index, fdt_size_t *sizep)
165 debug("%s: ", __func__);
167 parent = fdt_parent_offset(blob, node);
169 debug("(no parent found)\n");
170 return FDT_ADDR_T_NONE;
173 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
177 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
178 const char *prop_name, fdt_size_t *sizep)
180 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
182 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
183 sizeof(fdt_addr_t) / sizeof(fdt32_t),
187 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
188 const char *prop_name)
190 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
194 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
195 const char *prop_name, struct fdt_pci_addr *addr)
201 debug("%s: %s: ", __func__, prop_name);
204 * If we follow the pci bus bindings strictly, we should check
205 * the value of the node's parent node's #address-cells and
206 * #size-cells. They need to be 3 and 2 accordingly. However,
207 * for simplicity we skip the check here.
209 cell = fdt_getprop(blob, node, prop_name, &len);
213 if ((len % FDT_PCI_REG_SIZE) == 0) {
214 int num = len / FDT_PCI_REG_SIZE;
217 for (i = 0; i < num; i++) {
218 debug("pci address #%d: %08lx %08lx %08lx\n", i,
219 (ulong)fdt32_to_cpu(cell[0]),
220 (ulong)fdt32_to_cpu(cell[1]),
221 (ulong)fdt32_to_cpu(cell[2]));
222 if ((fdt32_to_cpu(*cell) & type) == type) {
223 addr->phys_hi = fdt32_to_cpu(cell[0]);
224 addr->phys_mid = fdt32_to_cpu(cell[1]);
225 addr->phys_lo = fdt32_to_cpu(cell[1]);
228 cell += (FDT_PCI_ADDR_CELLS +
244 debug("(not found)\n");
248 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
250 const char *list, *end;
253 list = fdt_getprop(blob, node, "compatible", &len);
262 if (len >= strlen("pciVVVV,DDDD")) {
263 s = strstr(list, "pci");
266 * check if the string is something like pciVVVV,DDDD.RR
267 * or just pciVVVV,DDDD
269 if (s && s[7] == ',' &&
270 (s[12] == '.' || s[12] == 0)) {
272 *vendor = simple_strtol(s, NULL, 16);
275 *device = simple_strtol(s, NULL, 16);
286 int fdtdec_get_pci_bdf(const void *blob, int node,
287 struct fdt_pci_addr *addr, pci_dev_t *bdf)
289 u16 dt_vendor, dt_device, vendor, device;
292 /* get vendor id & device id from the compatible string */
293 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
297 /* extract the bdf from fdt_pci_addr */
298 *bdf = addr->phys_hi & 0xffff00;
300 /* read vendor id & device id based on bdf */
301 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
302 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
305 * Note there are two places in the device tree to fully describe
306 * a pci device: one is via compatible string with a format of
307 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
308 * the device node's reg address property. We read the vendor id
309 * and device id based on bdf and compare the values with the
310 * "VVVV,DDDD". If they are the same, then we are good to use bdf
311 * to read device's bar. But if they are different, we have to rely
312 * on the vendor id and device id extracted from the compatible
313 * string and locate the real bdf by pci_find_device(). This is
314 * because normally we may only know device's device number and
315 * function number when writing device tree. The bus number is
316 * dynamically assigned during the pci enumeration process.
318 if ((dt_vendor != vendor) || (dt_device != device)) {
319 *bdf = pci_find_device(dt_vendor, dt_device, 0);
327 int fdtdec_get_pci_bar32(const void *blob, int node,
328 struct fdt_pci_addr *addr, u32 *bar)
334 /* get pci devices's bdf */
335 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
339 /* extract the bar number from fdt_pci_addr */
340 barnum = addr->phys_hi & 0xff;
341 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
344 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
345 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
351 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
352 uint64_t default_val)
354 const uint64_t *cell64;
357 cell64 = fdt_getprop(blob, node, prop_name, &length);
358 if (!cell64 || length < sizeof(*cell64))
361 return fdt64_to_cpu(*cell64);
364 int fdtdec_get_is_enabled(const void *blob, int node)
369 * It should say "okay", so only allow that. Some fdts use "ok" but
370 * this is a bug. Please fix your device tree source file. See here
373 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
375 cell = fdt_getprop(blob, node, "status", NULL);
377 return 0 == strcmp(cell, "okay");
381 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
383 enum fdt_compat_id id;
385 /* Search our drivers */
386 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
387 if (0 == fdt_node_check_compatible(blob, node,
390 return COMPAT_UNKNOWN;
393 int fdtdec_next_compatible(const void *blob, int node,
394 enum fdt_compat_id id)
396 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
399 int fdtdec_next_compatible_subnode(const void *blob, int node,
400 enum fdt_compat_id id, int *depthp)
403 node = fdt_next_node(blob, node, depthp);
404 } while (*depthp > 1);
406 /* If this is a direct subnode, and compatible, return it */
407 if (*depthp == 1 && 0 == fdt_node_check_compatible(
408 blob, node, compat_names[id]))
411 return -FDT_ERR_NOTFOUND;
414 int fdtdec_next_alias(const void *blob, const char *name,
415 enum fdt_compat_id id, int *upto)
417 #define MAX_STR_LEN 20
418 char str[MAX_STR_LEN + 20];
421 /* snprintf() is not available */
422 assert(strlen(name) < MAX_STR_LEN);
423 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
424 node = fdt_path_offset(blob, str);
427 err = fdt_node_check_compatible(blob, node, compat_names[id]);
431 return -FDT_ERR_NOTFOUND;
436 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
437 enum fdt_compat_id id, int *node_list, int maxcount)
439 memset(node_list, '\0', sizeof(*node_list) * maxcount);
441 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
444 /* TODO: Can we tighten this code up a little? */
445 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
446 enum fdt_compat_id id, int *node_list, int maxcount)
448 int name_len = strlen(name);
456 /* find the alias node if present */
457 alias_node = fdt_path_offset(blob, "/aliases");
460 * start with nothing, and we can assume that the root node can't
463 memset(nodes, '\0', sizeof(nodes));
465 /* First find all the compatible nodes */
466 for (node = count = 0; node >= 0 && count < maxcount;) {
467 node = fdtdec_next_compatible(blob, node, id);
469 nodes[count++] = node;
472 debug("%s: warning: maxcount exceeded with alias '%s'\n",
475 /* Now find all the aliases */
476 for (offset = fdt_first_property_offset(blob, alias_node);
478 offset = fdt_next_property_offset(blob, offset)) {
479 const struct fdt_property *prop;
485 prop = fdt_get_property_by_offset(blob, offset, NULL);
486 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
487 if (prop->len && 0 == strncmp(path, name, name_len))
488 node = fdt_path_offset(blob, prop->data);
492 /* Get the alias number */
493 number = simple_strtoul(path + name_len, NULL, 10);
494 if (number < 0 || number >= maxcount) {
495 debug("%s: warning: alias '%s' is out of range\n",
500 /* Make sure the node we found is actually in our list! */
502 for (j = 0; j < count; j++)
503 if (nodes[j] == node) {
509 debug("%s: warning: alias '%s' points to a node "
510 "'%s' that is missing or is not compatible "
511 " with '%s'\n", __func__, path,
512 fdt_get_name(blob, node, NULL),
518 * Add this node to our list in the right place, and mark
521 if (fdtdec_get_is_enabled(blob, node)) {
522 if (node_list[number]) {
523 debug("%s: warning: alias '%s' requires that "
524 "a node be placed in the list in a "
525 "position which is already filled by "
526 "node '%s'\n", __func__, path,
527 fdt_get_name(blob, node, NULL));
530 node_list[number] = node;
531 if (number >= num_found)
532 num_found = number + 1;
537 /* Add any nodes not mentioned by an alias */
538 for (i = j = 0; i < maxcount; i++) {
540 for (; j < maxcount; j++)
542 fdtdec_get_is_enabled(blob, nodes[j]))
545 /* Have we run out of nodes to add? */
549 assert(!node_list[i]);
550 node_list[i] = nodes[j++];
559 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
562 int base_len = strlen(base);
563 const char *find_name;
568 find_name = fdt_get_name(blob, offset, &find_namelen);
569 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
571 aliases = fdt_path_offset(blob, "/aliases");
572 for (prop_offset = fdt_first_property_offset(blob, aliases);
574 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
580 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
581 debug(" - %s, %s\n", name, prop);
582 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
583 strncmp(name, base, base_len))
586 slash = strrchr(prop, '/');
587 if (strcmp(slash + 1, find_name))
589 val = trailing_strtol(name);
592 debug("Found seq %d\n", *seqp);
597 debug("Not found\n");
601 const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
607 chosen_node = fdt_path_offset(blob, "/chosen");
608 return fdt_getprop(blob, chosen_node, name, NULL);
611 int fdtdec_get_chosen_node(const void *blob, const char *name)
615 prop = fdtdec_get_chosen_prop(blob, name);
617 return -FDT_ERR_NOTFOUND;
618 return fdt_path_offset(blob, prop);
621 int fdtdec_check_fdt(void)
624 * We must have an FDT, but we cannot panic() yet since the console
625 * is not ready. So for now, just assert(). Boards which need an early
626 * FDT (prior to console ready) will need to make their own
627 * arrangements and do their own checks.
629 assert(!fdtdec_prepare_fdt());
634 * This function is a little odd in that it accesses global data. At some
635 * point if the architecture board.c files merge this will make more sense.
636 * Even now, it is common code.
638 int fdtdec_prepare_fdt(void)
640 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
641 fdt_check_header(gd->fdt_blob)) {
642 #ifdef CONFIG_SPL_BUILD
643 puts("Missing DTB\n");
645 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");
648 printf("fdt_blob=%p\n", gd->fdt_blob);
649 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
659 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
664 debug("%s: %s\n", __func__, prop_name);
665 phandle = fdt_getprop(blob, node, prop_name, NULL);
667 return -FDT_ERR_NOTFOUND;
669 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
674 * Look up a property in a node and check that it has a minimum length.
676 * @param blob FDT blob
677 * @param node node to examine
678 * @param prop_name name of property to find
679 * @param min_len minimum property length in bytes
680 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
681 found, or -FDT_ERR_BADLAYOUT if not enough data
682 * @return pointer to cell, which is only valid if err == 0
684 static const void *get_prop_check_min_len(const void *blob, int node,
685 const char *prop_name, int min_len, int *err)
690 debug("%s: %s\n", __func__, prop_name);
691 cell = fdt_getprop(blob, node, prop_name, &len);
693 *err = -FDT_ERR_NOTFOUND;
694 else if (len < min_len)
695 *err = -FDT_ERR_BADLAYOUT;
701 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
702 u32 *array, int count)
707 debug("%s: %s\n", __func__, prop_name);
708 cell = get_prop_check_min_len(blob, node, prop_name,
709 sizeof(u32) * count, &err);
711 for (i = 0; i < count; i++)
712 array[i] = fdt32_to_cpu(cell[i]);
717 int fdtdec_get_int_array_count(const void *blob, int node,
718 const char *prop_name, u32 *array, int count)
724 debug("%s: %s\n", __func__, prop_name);
725 cell = fdt_getprop(blob, node, prop_name, &len);
727 return -FDT_ERR_NOTFOUND;
728 elems = len / sizeof(u32);
731 for (i = 0; i < count; i++)
732 array[i] = fdt32_to_cpu(cell[i]);
737 const u32 *fdtdec_locate_array(const void *blob, int node,
738 const char *prop_name, int count)
743 cell = get_prop_check_min_len(blob, node, prop_name,
744 sizeof(u32) * count, &err);
745 return err ? NULL : cell;
748 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
753 debug("%s: %s\n", __func__, prop_name);
754 cell = fdt_getprop(blob, node, prop_name, &len);
758 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
759 const char *list_name,
760 const char *cells_name,
761 int cell_count, int index,
762 struct fdtdec_phandle_args *out_args)
764 const __be32 *list, *list_end;
765 int rc = 0, size, cur_index = 0;
770 /* Retrieve the phandle list property */
771 list = fdt_getprop(blob, src_node, list_name, &size);
774 list_end = list + size / sizeof(*list);
776 /* Loop over the phandles until all the requested entry is found */
777 while (list < list_end) {
782 * If phandle is 0, then it is an empty entry with no
783 * arguments. Skip forward to the next entry.
785 phandle = be32_to_cpup(list++);
788 * Find the provider node and parse the #*-cells
789 * property to determine the argument length.
791 * This is not needed if the cell count is hard-coded
792 * (i.e. cells_name not set, but cell_count is set),
793 * except when we're going to return the found node
796 if (cells_name || cur_index == index) {
797 node = fdt_node_offset_by_phandle(blob,
800 debug("%s: could not find phandle\n",
801 fdt_get_name(blob, src_node,
808 count = fdtdec_get_int(blob, node, cells_name,
811 debug("%s: could not get %s for %s\n",
812 fdt_get_name(blob, src_node,
815 fdt_get_name(blob, node,
824 * Make sure that the arguments actually fit in the
825 * remaining property data length
827 if (list + count > list_end) {
828 debug("%s: arguments longer than property\n",
829 fdt_get_name(blob, src_node, NULL));
835 * All of the error cases above bail out of the loop, so at
836 * this point, the parsing is successful. If the requested
837 * index matches, then fill the out_args structure and return,
838 * or return -ENOENT for an empty entry.
841 if (cur_index == index) {
848 if (count > MAX_PHANDLE_ARGS) {
849 debug("%s: too many arguments %d\n",
850 fdt_get_name(blob, src_node,
852 count = MAX_PHANDLE_ARGS;
854 out_args->node = node;
855 out_args->args_count = count;
856 for (i = 0; i < count; i++) {
858 be32_to_cpup(list++);
862 /* Found it! return success */
872 * Result will be one of:
873 * -ENOENT : index is for empty phandle
874 * -EINVAL : parsing error on data
875 * [1..n] : Number of phandle (count mode; when index = -1)
877 rc = index < 0 ? cur_index : -ENOENT;
882 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
883 u8 *array, int count)
888 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
890 memcpy(array, cell, count);
894 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
895 const char *prop_name, int count)
900 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
906 int fdtdec_get_config_int(const void *blob, const char *prop_name,
911 debug("%s: %s\n", __func__, prop_name);
912 config_node = fdt_path_offset(blob, "/config");
915 return fdtdec_get_int(blob, config_node, prop_name, default_val);
918 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
923 debug("%s: %s\n", __func__, prop_name);
924 config_node = fdt_path_offset(blob, "/config");
927 prop = fdt_get_property(blob, config_node, prop_name, NULL);
932 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
938 debug("%s: %s\n", __func__, prop_name);
939 nodeoffset = fdt_path_offset(blob, "/config");
943 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
947 return (char *)nodep;
950 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
951 fdt_addr_t *basep, fdt_size_t *sizep)
953 const fdt_addr_t *cell;
956 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
958 cell = fdt_getprop(blob, node, prop_name, &len);
959 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
960 debug("cell=%p, len=%d\n", cell, len);
964 *basep = fdt_addr_to_cpu(*cell);
965 *sizep = fdt_size_to_cpu(cell[1]);
966 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
973 * Read a flash entry from the fdt
975 * @param blob FDT blob
976 * @param node Offset of node to read
977 * @param name Name of node being read
978 * @param entry Place to put offset and size of this node
979 * @return 0 if ok, -ve on error
981 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
982 struct fmap_entry *entry)
987 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
988 debug("Node '%s' has bad/missing 'reg' property\n", name);
989 return -FDT_ERR_NOTFOUND;
991 entry->offset = reg[0];
992 entry->length = reg[1];
993 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
994 prop = fdt_getprop(blob, node, "compress", NULL);
995 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
996 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
997 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
998 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
999 entry->hash = (uint8_t *)prop;
1004 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
1009 number = (number << 32) | fdt32_to_cpu(*ptr++);
1014 int fdt_get_resource(const void *fdt, int node, const char *property,
1015 unsigned int index, struct fdt_resource *res)
1017 const fdt32_t *ptr, *end;
1018 int na, ns, len, parent;
1021 parent = fdt_parent_offset(fdt, node);
1025 na = fdt_address_cells(fdt, parent);
1026 ns = fdt_size_cells(fdt, parent);
1028 ptr = fdt_getprop(fdt, node, property, &len);
1032 end = ptr + len / sizeof(*ptr);
1034 while (ptr + na + ns <= end) {
1036 res->start = res->end = fdtdec_get_number(ptr, na);
1037 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
1045 return -FDT_ERR_NOTFOUND;
1048 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1049 const char *prop_names, const char *name,
1050 struct fdt_resource *res)
1054 index = fdt_find_string(fdt, node, prop_names, name);
1058 return fdt_get_resource(fdt, node, property, index, res);
1061 int fdtdec_decode_memory_region(const void *blob, int config_node,
1062 const char *mem_type, const char *suffix,
1063 fdt_addr_t *basep, fdt_size_t *sizep)
1067 fdt_size_t size, offset_size;
1068 fdt_addr_t base, offset;
1071 if (config_node == -1) {
1072 config_node = fdt_path_offset(blob, "/config");
1073 if (config_node < 0) {
1074 debug("%s: Cannot find /config node\n", __func__);
1081 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1083 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1085 debug("%s: No memory type for '%s', using /memory\n", __func__,
1090 node = fdt_path_offset(blob, mem);
1092 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1093 fdt_strerror(node));
1098 * Not strictly correct - the memory may have multiple banks. We just
1101 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1102 debug("%s: Failed to decode memory region %s\n", __func__,
1107 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1109 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1111 debug("%s: Failed to decode memory region '%s'\n", __func__,
1116 *basep = base + offset;
1117 *sizep = offset_size;
1122 static int decode_timing_property(const void *blob, int node, const char *name,
1123 struct timing_entry *result)
1125 int length, ret = 0;
1128 prop = fdt_getprop(blob, node, name, &length);
1130 debug("%s: could not find property %s\n",
1131 fdt_get_name(blob, node, NULL), name);
1135 if (length == sizeof(u32)) {
1136 result->typ = fdtdec_get_int(blob, node, name, 0);
1137 result->min = result->typ;
1138 result->max = result->typ;
1140 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1146 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1147 struct display_timing *dt)
1149 int i, node, timings_node;
1153 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1154 if (timings_node < 0)
1155 return timings_node;
1157 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1158 node > 0 && i != index;
1159 node = fdt_next_subnode(blob, node))
1165 memset(dt, 0, sizeof(*dt));
1167 ret |= decode_timing_property(blob, node, "hback-porch",
1169 ret |= decode_timing_property(blob, node, "hfront-porch",
1171 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1172 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1173 ret |= decode_timing_property(blob, node, "vback-porch",
1175 ret |= decode_timing_property(blob, node, "vfront-porch",
1177 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1178 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1179 ret |= decode_timing_property(blob, node, "clock-frequency",
1183 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1185 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1186 DISPLAY_FLAGS_VSYNC_LOW;
1188 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1190 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1191 DISPLAY_FLAGS_HSYNC_LOW;
1193 val = fdtdec_get_int(blob, node, "de-active", -1);
1195 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1196 DISPLAY_FLAGS_DE_LOW;
1198 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1200 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1201 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1204 if (fdtdec_get_bool(blob, node, "interlaced"))
1205 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1206 if (fdtdec_get_bool(blob, node, "doublescan"))
1207 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1208 if (fdtdec_get_bool(blob, node, "doubleclk"))
1209 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1214 int fdtdec_setup(void)
1216 #if CONFIG_IS_ENABLED(OF_CONTROL)
1217 # ifdef CONFIG_OF_EMBED
1218 /* Get a pointer to the FDT */
1219 gd->fdt_blob = __dtb_dt_begin;
1220 # elif defined CONFIG_OF_SEPARATE
1221 # ifdef CONFIG_SPL_BUILD
1222 /* FDT is at end of BSS unless it is in a different memory region */
1223 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
1224 gd->fdt_blob = (ulong *)&_image_binary_end;
1226 gd->fdt_blob = (ulong *)&__bss_end;
1228 /* FDT is at end of image */
1229 gd->fdt_blob = (ulong *)&_end;
1231 # elif defined(CONFIG_OF_HOSTFILE)
1232 if (sandbox_read_fdt_from_file()) {
1233 puts("Failed to read control FDT\n");
1237 # ifndef CONFIG_SPL_BUILD
1238 /* Allow the early environment to override the fdt address */
1239 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1240 (uintptr_t)gd->fdt_blob);
1243 return fdtdec_prepare_fdt();
1246 #endif /* !USE_HOSTCC */