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_KBC, "nvidia,tegra20-kbc"),
28 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
29 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
30 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"),
31 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"),
32 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
33 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
34 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
35 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
36 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
37 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
38 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"),
39 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"),
40 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"),
41 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
42 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
43 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
44 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
45 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
46 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
47 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
48 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
49 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
50 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
51 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
52 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
53 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
54 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
55 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
56 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
57 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
58 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
59 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
60 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
61 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
62 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
63 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
64 COMPAT(INTEL_MICROCODE, "intel,microcode"),
65 COMPAT(MEMORY_SPD, "memory-spd"),
66 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
67 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
68 COMPAT(INTEL_GMA, "intel,gma"),
69 COMPAT(AMS_AS3722, "ams,as3722"),
70 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
71 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
72 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"),
73 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
74 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
75 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
76 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
77 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
78 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
79 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
82 const char *fdtdec_get_compatible(enum fdt_compat_id id)
84 /* We allow reading of the 'unknown' ID for testing purposes */
85 assert(id >= 0 && id < COMPAT_COUNT);
86 return compat_names[id];
89 fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
90 const char *prop_name, int index, int na, int ns,
93 const fdt32_t *prop, *prop_end;
94 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
98 debug("%s: %s: ", __func__, prop_name);
100 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
101 debug("(na too large for fdt_addr_t type)\n");
102 return FDT_ADDR_T_NONE;
105 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
106 debug("(ns too large for fdt_size_t type)\n");
107 return FDT_ADDR_T_NONE;
110 prop = fdt_getprop(blob, node, prop_name, &len);
112 debug("(not found)\n");
113 return FDT_ADDR_T_NONE;
115 prop_end = prop + (len / sizeof(*prop));
117 prop_addr = prop + (index * (na + ns));
118 prop_size = prop_addr + na;
119 prop_after_size = prop_size + ns;
120 if (prop_after_size > prop_end) {
121 debug("(not enough data: expected >= %d cells, got %d cells)\n",
122 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
123 return FDT_ADDR_T_NONE;
126 addr = fdtdec_get_number(prop_addr, na);
129 *sizep = fdtdec_get_number(prop_size, ns);
130 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep);
132 debug("addr=%08llx\n", (u64)addr);
138 fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
139 int node, const char *prop_name, int index, fdt_size_t *sizep)
143 debug("%s: ", __func__);
145 na = fdt_address_cells(blob, parent);
147 debug("(bad #address-cells)\n");
148 return FDT_ADDR_T_NONE;
151 ns = fdt_size_cells(blob, parent);
153 debug("(bad #size-cells)\n");
154 return FDT_ADDR_T_NONE;
157 debug("na=%d, ns=%d, ", na, ns);
159 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
163 fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
164 const char *prop_name, int index, fdt_size_t *sizep)
168 debug("%s: ", __func__);
170 parent = fdt_parent_offset(blob, node);
172 debug("(no parent found)\n");
173 return FDT_ADDR_T_NONE;
176 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
180 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
181 const char *prop_name, fdt_size_t *sizep)
183 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
185 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
186 sizeof(fdt_addr_t) / sizeof(fdt32_t),
190 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
191 const char *prop_name)
193 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
197 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
198 const char *prop_name, struct fdt_pci_addr *addr)
204 debug("%s: %s: ", __func__, prop_name);
207 * If we follow the pci bus bindings strictly, we should check
208 * the value of the node's parent node's #address-cells and
209 * #size-cells. They need to be 3 and 2 accordingly. However,
210 * for simplicity we skip the check here.
212 cell = fdt_getprop(blob, node, prop_name, &len);
216 if ((len % FDT_PCI_REG_SIZE) == 0) {
217 int num = len / FDT_PCI_REG_SIZE;
220 for (i = 0; i < num; i++) {
221 debug("pci address #%d: %08lx %08lx %08lx\n", i,
222 (ulong)fdt_addr_to_cpu(cell[0]),
223 (ulong)fdt_addr_to_cpu(cell[1]),
224 (ulong)fdt_addr_to_cpu(cell[2]));
225 if ((fdt_addr_to_cpu(*cell) & type) == type) {
226 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
227 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
228 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
231 cell += (FDT_PCI_ADDR_CELLS +
247 debug("(not found)\n");
251 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
253 const char *list, *end;
256 list = fdt_getprop(blob, node, "compatible", &len);
265 if (len >= strlen("pciVVVV,DDDD")) {
266 s = strstr(list, "pci");
269 * check if the string is something like pciVVVV,DDDD.RR
270 * or just pciVVVV,DDDD
272 if (s && s[7] == ',' &&
273 (s[12] == '.' || s[12] == 0)) {
275 *vendor = simple_strtol(s, NULL, 16);
278 *device = simple_strtol(s, NULL, 16);
289 int fdtdec_get_pci_bdf(const void *blob, int node,
290 struct fdt_pci_addr *addr, pci_dev_t *bdf)
292 u16 dt_vendor, dt_device, vendor, device;
295 /* get vendor id & device id from the compatible string */
296 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
300 /* extract the bdf from fdt_pci_addr */
301 *bdf = addr->phys_hi & 0xffff00;
303 /* read vendor id & device id based on bdf */
304 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
305 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
308 * Note there are two places in the device tree to fully describe
309 * a pci device: one is via compatible string with a format of
310 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
311 * the device node's reg address property. We read the vendor id
312 * and device id based on bdf and compare the values with the
313 * "VVVV,DDDD". If they are the same, then we are good to use bdf
314 * to read device's bar. But if they are different, we have to rely
315 * on the vendor id and device id extracted from the compatible
316 * string and locate the real bdf by pci_find_device(). This is
317 * because normally we may only know device's device number and
318 * function number when writing device tree. The bus number is
319 * dynamically assigned during the pci enumeration process.
321 if ((dt_vendor != vendor) || (dt_device != device)) {
322 *bdf = pci_find_device(dt_vendor, dt_device, 0);
330 int fdtdec_get_pci_bar32(const void *blob, int node,
331 struct fdt_pci_addr *addr, u32 *bar)
337 /* get pci devices's bdf */
338 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
342 /* extract the bar number from fdt_pci_addr */
343 barnum = addr->phys_hi & 0xff;
344 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
347 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
348 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
354 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
355 uint64_t default_val)
357 const uint64_t *cell64;
360 cell64 = fdt_getprop(blob, node, prop_name, &length);
361 if (!cell64 || length < sizeof(*cell64))
364 return fdt64_to_cpu(*cell64);
367 int fdtdec_get_is_enabled(const void *blob, int node)
372 * It should say "okay", so only allow that. Some fdts use "ok" but
373 * this is a bug. Please fix your device tree source file. See here
376 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
378 cell = fdt_getprop(blob, node, "status", NULL);
380 return 0 == strcmp(cell, "okay");
384 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
386 enum fdt_compat_id id;
388 /* Search our drivers */
389 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
390 if (0 == fdt_node_check_compatible(blob, node,
393 return COMPAT_UNKNOWN;
396 int fdtdec_next_compatible(const void *blob, int node,
397 enum fdt_compat_id id)
399 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
402 int fdtdec_next_compatible_subnode(const void *blob, int node,
403 enum fdt_compat_id id, int *depthp)
406 node = fdt_next_node(blob, node, depthp);
407 } while (*depthp > 1);
409 /* If this is a direct subnode, and compatible, return it */
410 if (*depthp == 1 && 0 == fdt_node_check_compatible(
411 blob, node, compat_names[id]))
414 return -FDT_ERR_NOTFOUND;
417 int fdtdec_next_alias(const void *blob, const char *name,
418 enum fdt_compat_id id, int *upto)
420 #define MAX_STR_LEN 20
421 char str[MAX_STR_LEN + 20];
424 /* snprintf() is not available */
425 assert(strlen(name) < MAX_STR_LEN);
426 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
427 node = fdt_path_offset(blob, str);
430 err = fdt_node_check_compatible(blob, node, compat_names[id]);
434 return -FDT_ERR_NOTFOUND;
439 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
440 enum fdt_compat_id id, int *node_list, int maxcount)
442 memset(node_list, '\0', sizeof(*node_list) * maxcount);
444 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
447 /* TODO: Can we tighten this code up a little? */
448 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
449 enum fdt_compat_id id, int *node_list, int maxcount)
451 int name_len = strlen(name);
459 /* find the alias node if present */
460 alias_node = fdt_path_offset(blob, "/aliases");
463 * start with nothing, and we can assume that the root node can't
466 memset(nodes, '\0', sizeof(nodes));
468 /* First find all the compatible nodes */
469 for (node = count = 0; node >= 0 && count < maxcount;) {
470 node = fdtdec_next_compatible(blob, node, id);
472 nodes[count++] = node;
475 debug("%s: warning: maxcount exceeded with alias '%s'\n",
478 /* Now find all the aliases */
479 for (offset = fdt_first_property_offset(blob, alias_node);
481 offset = fdt_next_property_offset(blob, offset)) {
482 const struct fdt_property *prop;
488 prop = fdt_get_property_by_offset(blob, offset, NULL);
489 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
490 if (prop->len && 0 == strncmp(path, name, name_len))
491 node = fdt_path_offset(blob, prop->data);
495 /* Get the alias number */
496 number = simple_strtoul(path + name_len, NULL, 10);
497 if (number < 0 || number >= maxcount) {
498 debug("%s: warning: alias '%s' is out of range\n",
503 /* Make sure the node we found is actually in our list! */
505 for (j = 0; j < count; j++)
506 if (nodes[j] == node) {
512 debug("%s: warning: alias '%s' points to a node "
513 "'%s' that is missing or is not compatible "
514 " with '%s'\n", __func__, path,
515 fdt_get_name(blob, node, NULL),
521 * Add this node to our list in the right place, and mark
524 if (fdtdec_get_is_enabled(blob, node)) {
525 if (node_list[number]) {
526 debug("%s: warning: alias '%s' requires that "
527 "a node be placed in the list in a "
528 "position which is already filled by "
529 "node '%s'\n", __func__, path,
530 fdt_get_name(blob, node, NULL));
533 node_list[number] = node;
534 if (number >= num_found)
535 num_found = number + 1;
540 /* Add any nodes not mentioned by an alias */
541 for (i = j = 0; i < maxcount; i++) {
543 for (; j < maxcount; j++)
545 fdtdec_get_is_enabled(blob, nodes[j]))
548 /* Have we run out of nodes to add? */
552 assert(!node_list[i]);
553 node_list[i] = nodes[j++];
562 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
565 int base_len = strlen(base);
566 const char *find_name;
571 find_name = fdt_get_name(blob, offset, &find_namelen);
572 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
574 aliases = fdt_path_offset(blob, "/aliases");
575 for (prop_offset = fdt_first_property_offset(blob, aliases);
577 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
583 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
584 debug(" - %s, %s\n", name, prop);
585 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
586 strncmp(name, base, base_len))
589 slash = strrchr(prop, '/');
590 if (strcmp(slash + 1, find_name))
592 val = trailing_strtol(name);
595 debug("Found seq %d\n", *seqp);
600 debug("Not found\n");
604 int fdtdec_get_chosen_node(const void *blob, const char *name)
611 return -FDT_ERR_NOTFOUND;
612 chosen_node = fdt_path_offset(blob, "/chosen");
613 prop = fdt_getprop(blob, chosen_node, name, &len);
615 return -FDT_ERR_NOTFOUND;
616 return fdt_path_offset(blob, prop);
619 int fdtdec_check_fdt(void)
622 * We must have an FDT, but we cannot panic() yet since the console
623 * is not ready. So for now, just assert(). Boards which need an early
624 * FDT (prior to console ready) will need to make their own
625 * arrangements and do their own checks.
627 assert(!fdtdec_prepare_fdt());
632 * This function is a little odd in that it accesses global data. At some
633 * point if the architecture board.c files merge this will make more sense.
634 * Even now, it is common code.
636 int fdtdec_prepare_fdt(void)
638 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
639 fdt_check_header(gd->fdt_blob)) {
640 #ifdef CONFIG_SPL_BUILD
641 puts("Missing DTB\n");
643 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");
646 printf("fdt_blob=%p\n", gd->fdt_blob);
647 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
657 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
662 debug("%s: %s\n", __func__, prop_name);
663 phandle = fdt_getprop(blob, node, prop_name, NULL);
665 return -FDT_ERR_NOTFOUND;
667 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
672 * Look up a property in a node and check that it has a minimum length.
674 * @param blob FDT blob
675 * @param node node to examine
676 * @param prop_name name of property to find
677 * @param min_len minimum property length in bytes
678 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
679 found, or -FDT_ERR_BADLAYOUT if not enough data
680 * @return pointer to cell, which is only valid if err == 0
682 static const void *get_prop_check_min_len(const void *blob, int node,
683 const char *prop_name, int min_len, int *err)
688 debug("%s: %s\n", __func__, prop_name);
689 cell = fdt_getprop(blob, node, prop_name, &len);
691 *err = -FDT_ERR_NOTFOUND;
692 else if (len < min_len)
693 *err = -FDT_ERR_BADLAYOUT;
699 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
700 u32 *array, int count)
705 debug("%s: %s\n", __func__, prop_name);
706 cell = get_prop_check_min_len(blob, node, prop_name,
707 sizeof(u32) * count, &err);
709 for (i = 0; i < count; i++)
710 array[i] = fdt32_to_cpu(cell[i]);
715 int fdtdec_get_int_array_count(const void *blob, int node,
716 const char *prop_name, u32 *array, int count)
722 debug("%s: %s\n", __func__, prop_name);
723 cell = fdt_getprop(blob, node, prop_name, &len);
725 return -FDT_ERR_NOTFOUND;
726 elems = len / sizeof(u32);
729 for (i = 0; i < count; i++)
730 array[i] = fdt32_to_cpu(cell[i]);
735 const u32 *fdtdec_locate_array(const void *blob, int node,
736 const char *prop_name, int count)
741 cell = get_prop_check_min_len(blob, node, prop_name,
742 sizeof(u32) * count, &err);
743 return err ? NULL : cell;
746 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
751 debug("%s: %s\n", __func__, prop_name);
752 cell = fdt_getprop(blob, node, prop_name, &len);
756 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
757 const char *list_name,
758 const char *cells_name,
759 int cell_count, int index,
760 struct fdtdec_phandle_args *out_args)
762 const __be32 *list, *list_end;
763 int rc = 0, size, cur_index = 0;
768 /* Retrieve the phandle list property */
769 list = fdt_getprop(blob, src_node, list_name, &size);
772 list_end = list + size / sizeof(*list);
774 /* Loop over the phandles until all the requested entry is found */
775 while (list < list_end) {
780 * If phandle is 0, then it is an empty entry with no
781 * arguments. Skip forward to the next entry.
783 phandle = be32_to_cpup(list++);
786 * Find the provider node and parse the #*-cells
787 * property to determine the argument length.
789 * This is not needed if the cell count is hard-coded
790 * (i.e. cells_name not set, but cell_count is set),
791 * except when we're going to return the found node
794 if (cells_name || cur_index == index) {
795 node = fdt_node_offset_by_phandle(blob,
798 debug("%s: could not find phandle\n",
799 fdt_get_name(blob, src_node,
806 count = fdtdec_get_int(blob, node, cells_name,
809 debug("%s: could not get %s for %s\n",
810 fdt_get_name(blob, src_node,
813 fdt_get_name(blob, node,
822 * Make sure that the arguments actually fit in the
823 * remaining property data length
825 if (list + count > list_end) {
826 debug("%s: arguments longer than property\n",
827 fdt_get_name(blob, src_node, NULL));
833 * All of the error cases above bail out of the loop, so at
834 * this point, the parsing is successful. If the requested
835 * index matches, then fill the out_args structure and return,
836 * or return -ENOENT for an empty entry.
839 if (cur_index == index) {
846 if (count > MAX_PHANDLE_ARGS) {
847 debug("%s: too many arguments %d\n",
848 fdt_get_name(blob, src_node,
850 count = MAX_PHANDLE_ARGS;
852 out_args->node = node;
853 out_args->args_count = count;
854 for (i = 0; i < count; i++) {
856 be32_to_cpup(list++);
860 /* Found it! return success */
870 * Result will be one of:
871 * -ENOENT : index is for empty phandle
872 * -EINVAL : parsing error on data
873 * [1..n] : Number of phandle (count mode; when index = -1)
875 rc = index < 0 ? cur_index : -ENOENT;
880 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
881 u8 *array, int count)
886 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
888 memcpy(array, cell, count);
892 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
893 const char *prop_name, int count)
898 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
904 int fdtdec_get_config_int(const void *blob, const char *prop_name,
909 debug("%s: %s\n", __func__, prop_name);
910 config_node = fdt_path_offset(blob, "/config");
913 return fdtdec_get_int(blob, config_node, prop_name, default_val);
916 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
921 debug("%s: %s\n", __func__, prop_name);
922 config_node = fdt_path_offset(blob, "/config");
925 prop = fdt_get_property(blob, config_node, prop_name, NULL);
930 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
936 debug("%s: %s\n", __func__, prop_name);
937 nodeoffset = fdt_path_offset(blob, "/config");
941 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
945 return (char *)nodep;
948 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
949 fdt_addr_t *basep, fdt_size_t *sizep)
951 const fdt_addr_t *cell;
954 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
956 cell = fdt_getprop(blob, node, prop_name, &len);
957 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
958 debug("cell=%p, len=%d\n", cell, len);
962 *basep = fdt_addr_to_cpu(*cell);
963 *sizep = fdt_size_to_cpu(cell[1]);
964 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
971 * Read a flash entry from the fdt
973 * @param blob FDT blob
974 * @param node Offset of node to read
975 * @param name Name of node being read
976 * @param entry Place to put offset and size of this node
977 * @return 0 if ok, -ve on error
979 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
980 struct fmap_entry *entry)
985 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
986 debug("Node '%s' has bad/missing 'reg' property\n", name);
987 return -FDT_ERR_NOTFOUND;
989 entry->offset = reg[0];
990 entry->length = reg[1];
991 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
992 prop = fdt_getprop(blob, node, "compress", NULL);
993 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
994 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
995 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
996 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
997 entry->hash = (uint8_t *)prop;
1002 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
1007 number = (number << 32) | fdt32_to_cpu(*ptr++);
1012 int fdt_get_resource(const void *fdt, int node, const char *property,
1013 unsigned int index, struct fdt_resource *res)
1015 const fdt32_t *ptr, *end;
1016 int na, ns, len, parent;
1019 parent = fdt_parent_offset(fdt, node);
1023 na = fdt_address_cells(fdt, parent);
1024 ns = fdt_size_cells(fdt, parent);
1026 ptr = fdt_getprop(fdt, node, property, &len);
1030 end = ptr + len / sizeof(*ptr);
1032 while (ptr + na + ns <= end) {
1034 res->start = res->end = fdtdec_get_number(ptr, na);
1035 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
1043 return -FDT_ERR_NOTFOUND;
1046 int fdt_get_named_resource(const void *fdt, int node, const char *property,
1047 const char *prop_names, const char *name,
1048 struct fdt_resource *res)
1052 index = fdt_find_string(fdt, node, prop_names, name);
1056 return fdt_get_resource(fdt, node, property, index, res);
1059 int fdtdec_decode_memory_region(const void *blob, int config_node,
1060 const char *mem_type, const char *suffix,
1061 fdt_addr_t *basep, fdt_size_t *sizep)
1065 fdt_size_t size, offset_size;
1066 fdt_addr_t base, offset;
1069 if (config_node == -1) {
1070 config_node = fdt_path_offset(blob, "/config");
1071 if (config_node < 0) {
1072 debug("%s: Cannot find /config node\n", __func__);
1079 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1081 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1083 debug("%s: No memory type for '%s', using /memory\n", __func__,
1088 node = fdt_path_offset(blob, mem);
1090 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1091 fdt_strerror(node));
1096 * Not strictly correct - the memory may have multiple banks. We just
1099 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1100 debug("%s: Failed to decode memory region %s\n", __func__,
1105 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1107 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1109 debug("%s: Failed to decode memory region '%s'\n", __func__,
1114 *basep = base + offset;
1115 *sizep = offset_size;
1120 static int decode_timing_property(const void *blob, int node, const char *name,
1121 struct timing_entry *result)
1123 int length, ret = 0;
1126 prop = fdt_getprop(blob, node, name, &length);
1128 debug("%s: could not find property %s\n",
1129 fdt_get_name(blob, node, NULL), name);
1133 if (length == sizeof(u32)) {
1134 result->typ = fdtdec_get_int(blob, node, name, 0);
1135 result->min = result->typ;
1136 result->max = result->typ;
1138 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1144 int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1145 struct display_timing *dt)
1147 int i, node, timings_node;
1151 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1152 if (timings_node < 0)
1153 return timings_node;
1155 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1156 node > 0 && i != index;
1157 node = fdt_next_subnode(blob, node))
1163 memset(dt, 0, sizeof(*dt));
1165 ret |= decode_timing_property(blob, node, "hback-porch",
1167 ret |= decode_timing_property(blob, node, "hfront-porch",
1169 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1170 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1171 ret |= decode_timing_property(blob, node, "vback-porch",
1173 ret |= decode_timing_property(blob, node, "vfront-porch",
1175 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1176 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1177 ret |= decode_timing_property(blob, node, "clock-frequency",
1181 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1183 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1184 DISPLAY_FLAGS_VSYNC_LOW;
1186 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1188 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1189 DISPLAY_FLAGS_HSYNC_LOW;
1191 val = fdtdec_get_int(blob, node, "de-active", -1);
1193 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1194 DISPLAY_FLAGS_DE_LOW;
1196 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1198 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1199 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1202 if (fdtdec_get_bool(blob, node, "interlaced"))
1203 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1204 if (fdtdec_get_bool(blob, node, "doublescan"))
1205 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1206 if (fdtdec_get_bool(blob, node, "doubleclk"))
1207 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1212 int fdtdec_setup(void)
1214 #if CONFIG_IS_ENABLED(OF_CONTROL)
1215 # ifdef CONFIG_OF_EMBED
1216 /* Get a pointer to the FDT */
1217 gd->fdt_blob = __dtb_dt_begin;
1218 # elif defined CONFIG_OF_SEPARATE
1219 # ifdef CONFIG_SPL_BUILD
1220 /* FDT is at end of BSS */
1221 gd->fdt_blob = (ulong *)&__bss_end;
1223 /* FDT is at end of image */
1224 gd->fdt_blob = (ulong *)&_end;
1226 # elif defined(CONFIG_OF_HOSTFILE)
1227 if (sandbox_read_fdt_from_file()) {
1228 puts("Failed to read control FDT\n");
1232 # ifndef CONFIG_SPL_BUILD
1233 /* Allow the early environment to override the fdt address */
1234 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1235 (uintptr_t)gd->fdt_blob);
1238 return fdtdec_prepare_fdt();
1241 #endif /* !USE_HOSTCC */