2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <linux/ctype.h>
16 DECLARE_GLOBAL_DATA_PTR;
19 * Here are the type we know about. One day we might allow drivers to
20 * register. For now we just put them here. The COMPAT macro allows us to
21 * turn this into a sparse list later, and keeps the ID with the name.
23 #define COMPAT(id, name) name
24 static const char * const compat_names[COMPAT_COUNT] = {
25 COMPAT(UNKNOWN, "<none>"),
26 COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
27 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
28 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
29 COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"),
30 COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"),
31 COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
32 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
33 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
34 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
35 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
36 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
37 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
38 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
39 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
40 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
41 COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"),
42 COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"),
43 COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"),
44 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"),
45 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"),
46 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"),
47 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
48 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
49 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
50 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
51 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
52 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
53 COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
54 COMPAT(GOOGLE_CROS_EC, "google,cros-ec"),
55 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
56 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
57 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"),
58 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
59 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
60 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
61 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
62 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
63 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
64 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
65 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
66 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
67 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
68 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
69 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
70 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
71 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"),
72 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
73 COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"),
74 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
75 COMPAT(TI_TPS65090, "ti,tps65090"),
76 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"),
77 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
78 COMPAT(PARADE_PS8625, "parade,ps8625"),
79 COMPAT(COMPAT_INTEL_LPC, "intel,lpc"),
80 COMPAT(INTEL_MICROCODE, "intel,microcode"),
81 COMPAT(MEMORY_SPD, "memory-spd"),
82 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
83 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
84 COMPAT(INTEL_GMA, "intel,gma"),
85 COMPAT(AMS_AS3722, "ams,as3722"),
86 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
89 const char *fdtdec_get_compatible(enum fdt_compat_id id)
91 /* We allow reading of the 'unknown' ID for testing purposes */
92 assert(id >= 0 && id < COMPAT_COUNT);
93 return compat_names[id];
96 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
97 const char *prop_name, fdt_size_t *sizep)
99 const fdt_addr_t *cell;
102 debug("%s: %s: ", __func__, prop_name);
103 cell = fdt_getprop(blob, node, prop_name, &len);
104 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
105 len == sizeof(fdt_addr_t) * 2)) {
106 fdt_addr_t addr = fdt_addr_to_cpu(*cell);
108 const fdt_size_t *size;
110 size = (fdt_size_t *)((char *)cell +
112 *sizep = fdt_size_to_cpu(*size);
113 debug("addr=%08lx, size=%08x\n",
114 (ulong)addr, *sizep);
116 debug("%08lx\n", (ulong)addr);
120 debug("(not found)\n");
121 return FDT_ADDR_T_NONE;
124 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
125 const char *prop_name)
127 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
131 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
132 const char *prop_name, struct fdt_pci_addr *addr)
138 debug("%s: %s: ", __func__, prop_name);
141 * If we follow the pci bus bindings strictly, we should check
142 * the value of the node's parent node's #address-cells and
143 * #size-cells. They need to be 3 and 2 accordingly. However,
144 * for simplicity we skip the check here.
146 cell = fdt_getprop(blob, node, prop_name, &len);
150 if ((len % FDT_PCI_REG_SIZE) == 0) {
151 int num = len / FDT_PCI_REG_SIZE;
154 for (i = 0; i < num; i++) {
155 debug("pci address #%d: %08lx %08lx %08lx\n", i,
156 (ulong)fdt_addr_to_cpu(cell[0]),
157 (ulong)fdt_addr_to_cpu(cell[1]),
158 (ulong)fdt_addr_to_cpu(cell[2]));
159 if ((fdt_addr_to_cpu(*cell) & type) == type) {
160 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
161 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
162 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
165 cell += (FDT_PCI_ADDR_CELLS +
179 debug("(not found)\n");
183 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
185 const char *list, *end;
188 list = fdt_getprop(blob, node, "compatible", &len);
197 if (len >= strlen("pciVVVV,DDDD")) {
198 s = strstr(list, "pci");
201 * check if the string is something like pciVVVV,DDDD.RR
202 * or just pciVVVV,DDDD
204 if (s && s[7] == ',' &&
205 (s[12] == '.' || s[12] == 0)) {
207 *vendor = simple_strtol(s, NULL, 16);
210 *device = simple_strtol(s, NULL, 16);
222 int fdtdec_get_pci_bdf(const void *blob, int node,
223 struct fdt_pci_addr *addr, pci_dev_t *bdf)
225 u16 dt_vendor, dt_device, vendor, device;
228 /* get vendor id & device id from the compatible string */
229 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
233 /* extract the bdf from fdt_pci_addr */
234 *bdf = addr->phys_hi & 0xffff00;
236 /* read vendor id & device id based on bdf */
237 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
238 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
241 * Note there are two places in the device tree to fully describe
242 * a pci device: one is via compatible string with a format of
243 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
244 * the device node's reg address property. We read the vendor id
245 * and device id based on bdf and compare the values with the
246 * "VVVV,DDDD". If they are the same, then we are good to use bdf
247 * to read device's bar. But if they are different, we have to rely
248 * on the vendor id and device id extracted from the compatible
249 * string and locate the real bdf by pci_find_device(). This is
250 * because normally we may only know device's device number and
251 * function number when writing device tree. The bus number is
252 * dynamically assigned during the pci enumeration process.
254 if ((dt_vendor != vendor) || (dt_device != device)) {
255 *bdf = pci_find_device(dt_vendor, dt_device, 0);
263 int fdtdec_get_pci_bar32(const void *blob, int node,
264 struct fdt_pci_addr *addr, u32 *bar)
270 /* get pci devices's bdf */
271 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
275 /* extract the bar number from fdt_pci_addr */
276 barnum = addr->phys_hi & 0xff;
277 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
280 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
281 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
287 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
288 uint64_t default_val)
290 const uint64_t *cell64;
293 cell64 = fdt_getprop(blob, node, prop_name, &length);
294 if (!cell64 || length < sizeof(*cell64))
297 return fdt64_to_cpu(*cell64);
300 int fdtdec_get_is_enabled(const void *blob, int node)
305 * It should say "okay", so only allow that. Some fdts use "ok" but
306 * this is a bug. Please fix your device tree source file. See here
309 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
311 cell = fdt_getprop(blob, node, "status", NULL);
313 return 0 == strcmp(cell, "okay");
317 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
319 enum fdt_compat_id id;
321 /* Search our drivers */
322 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
323 if (0 == fdt_node_check_compatible(blob, node,
326 return COMPAT_UNKNOWN;
329 int fdtdec_next_compatible(const void *blob, int node,
330 enum fdt_compat_id id)
332 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
335 int fdtdec_next_compatible_subnode(const void *blob, int node,
336 enum fdt_compat_id id, int *depthp)
339 node = fdt_next_node(blob, node, depthp);
340 } while (*depthp > 1);
342 /* If this is a direct subnode, and compatible, return it */
343 if (*depthp == 1 && 0 == fdt_node_check_compatible(
344 blob, node, compat_names[id]))
347 return -FDT_ERR_NOTFOUND;
350 int fdtdec_next_alias(const void *blob, const char *name,
351 enum fdt_compat_id id, int *upto)
353 #define MAX_STR_LEN 20
354 char str[MAX_STR_LEN + 20];
357 /* snprintf() is not available */
358 assert(strlen(name) < MAX_STR_LEN);
359 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
360 node = fdt_path_offset(blob, str);
363 err = fdt_node_check_compatible(blob, node, compat_names[id]);
367 return -FDT_ERR_NOTFOUND;
372 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
373 enum fdt_compat_id id, int *node_list, int maxcount)
375 memset(node_list, '\0', sizeof(*node_list) * maxcount);
377 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
380 /* TODO: Can we tighten this code up a little? */
381 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
382 enum fdt_compat_id id, int *node_list, int maxcount)
384 int name_len = strlen(name);
392 /* find the alias node if present */
393 alias_node = fdt_path_offset(blob, "/aliases");
396 * start with nothing, and we can assume that the root node can't
399 memset(nodes, '\0', sizeof(nodes));
401 /* First find all the compatible nodes */
402 for (node = count = 0; node >= 0 && count < maxcount;) {
403 node = fdtdec_next_compatible(blob, node, id);
405 nodes[count++] = node;
408 debug("%s: warning: maxcount exceeded with alias '%s'\n",
411 /* Now find all the aliases */
412 for (offset = fdt_first_property_offset(blob, alias_node);
414 offset = fdt_next_property_offset(blob, offset)) {
415 const struct fdt_property *prop;
421 prop = fdt_get_property_by_offset(blob, offset, NULL);
422 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
423 if (prop->len && 0 == strncmp(path, name, name_len))
424 node = fdt_path_offset(blob, prop->data);
428 /* Get the alias number */
429 number = simple_strtoul(path + name_len, NULL, 10);
430 if (number < 0 || number >= maxcount) {
431 debug("%s: warning: alias '%s' is out of range\n",
436 /* Make sure the node we found is actually in our list! */
438 for (j = 0; j < count; j++)
439 if (nodes[j] == node) {
445 debug("%s: warning: alias '%s' points to a node "
446 "'%s' that is missing or is not compatible "
447 " with '%s'\n", __func__, path,
448 fdt_get_name(blob, node, NULL),
454 * Add this node to our list in the right place, and mark
457 if (fdtdec_get_is_enabled(blob, node)) {
458 if (node_list[number]) {
459 debug("%s: warning: alias '%s' requires that "
460 "a node be placed in the list in a "
461 "position which is already filled by "
462 "node '%s'\n", __func__, path,
463 fdt_get_name(blob, node, NULL));
466 node_list[number] = node;
467 if (number >= num_found)
468 num_found = number + 1;
473 /* Add any nodes not mentioned by an alias */
474 for (i = j = 0; i < maxcount; i++) {
476 for (; j < maxcount; j++)
478 fdtdec_get_is_enabled(blob, nodes[j]))
481 /* Have we run out of nodes to add? */
485 assert(!node_list[i]);
486 node_list[i] = nodes[j++];
495 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
498 int base_len = strlen(base);
499 const char *find_name;
504 find_name = fdt_get_name(blob, offset, &find_namelen);
505 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
507 aliases = fdt_path_offset(blob, "/aliases");
508 for (prop_offset = fdt_first_property_offset(blob, aliases);
510 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
517 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
518 debug(" - %s, %s\n", name, prop);
519 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
520 strncmp(name, base, base_len))
523 slash = strrchr(prop, '/');
524 if (strcmp(slash + 1, find_name))
526 for (p = name + strlen(name) - 1; p > name; p--) {
528 *seqp = simple_strtoul(p + 1, NULL, 10);
529 debug("Found seq %d\n", *seqp);
535 debug("Not found\n");
539 int fdtdec_get_chosen_node(const void *blob, const char *name)
546 return -FDT_ERR_NOTFOUND;
547 chosen_node = fdt_path_offset(blob, "/chosen");
548 prop = fdt_getprop(blob, chosen_node, name, &len);
550 return -FDT_ERR_NOTFOUND;
551 return fdt_path_offset(blob, prop);
554 int fdtdec_check_fdt(void)
557 * We must have an FDT, but we cannot panic() yet since the console
558 * is not ready. So for now, just assert(). Boards which need an early
559 * FDT (prior to console ready) will need to make their own
560 * arrangements and do their own checks.
562 assert(!fdtdec_prepare_fdt());
567 * This function is a little odd in that it accesses global data. At some
568 * point if the architecture board.c files merge this will make more sense.
569 * Even now, it is common code.
571 int fdtdec_prepare_fdt(void)
573 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
574 fdt_check_header(gd->fdt_blob)) {
575 printf("No valid FDT found - please append one to U-Boot "
576 "binary, use u-boot-dtb.bin or define "
577 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
583 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
588 debug("%s: %s\n", __func__, prop_name);
589 phandle = fdt_getprop(blob, node, prop_name, NULL);
591 return -FDT_ERR_NOTFOUND;
593 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
598 * Look up a property in a node and check that it has a minimum length.
600 * @param blob FDT blob
601 * @param node node to examine
602 * @param prop_name name of property to find
603 * @param min_len minimum property length in bytes
604 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
605 found, or -FDT_ERR_BADLAYOUT if not enough data
606 * @return pointer to cell, which is only valid if err == 0
608 static const void *get_prop_check_min_len(const void *blob, int node,
609 const char *prop_name, int min_len, int *err)
614 debug("%s: %s\n", __func__, prop_name);
615 cell = fdt_getprop(blob, node, prop_name, &len);
617 *err = -FDT_ERR_NOTFOUND;
618 else if (len < min_len)
619 *err = -FDT_ERR_BADLAYOUT;
625 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
626 u32 *array, int count)
631 debug("%s: %s\n", __func__, prop_name);
632 cell = get_prop_check_min_len(blob, node, prop_name,
633 sizeof(u32) * count, &err);
635 for (i = 0; i < count; i++)
636 array[i] = fdt32_to_cpu(cell[i]);
641 int fdtdec_get_int_array_count(const void *blob, int node,
642 const char *prop_name, u32 *array, int count)
648 debug("%s: %s\n", __func__, prop_name);
649 cell = fdt_getprop(blob, node, prop_name, &len);
651 return -FDT_ERR_NOTFOUND;
652 elems = len / sizeof(u32);
655 for (i = 0; i < count; i++)
656 array[i] = fdt32_to_cpu(cell[i]);
661 const u32 *fdtdec_locate_array(const void *blob, int node,
662 const char *prop_name, int count)
667 cell = get_prop_check_min_len(blob, node, prop_name,
668 sizeof(u32) * count, &err);
669 return err ? NULL : cell;
672 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
677 debug("%s: %s\n", __func__, prop_name);
678 cell = fdt_getprop(blob, node, prop_name, &len);
682 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
683 const char *list_name,
684 const char *cells_name,
685 int cell_count, int index,
686 struct fdtdec_phandle_args *out_args)
688 const __be32 *list, *list_end;
689 int rc = 0, size, cur_index = 0;
694 /* Retrieve the phandle list property */
695 list = fdt_getprop(blob, src_node, list_name, &size);
698 list_end = list + size / sizeof(*list);
700 /* Loop over the phandles until all the requested entry is found */
701 while (list < list_end) {
706 * If phandle is 0, then it is an empty entry with no
707 * arguments. Skip forward to the next entry.
709 phandle = be32_to_cpup(list++);
712 * Find the provider node and parse the #*-cells
713 * property to determine the argument length.
715 * This is not needed if the cell count is hard-coded
716 * (i.e. cells_name not set, but cell_count is set),
717 * except when we're going to return the found node
720 if (cells_name || cur_index == index) {
721 node = fdt_node_offset_by_phandle(blob,
724 debug("%s: could not find phandle\n",
725 fdt_get_name(blob, src_node,
732 count = fdtdec_get_int(blob, node, cells_name,
735 debug("%s: could not get %s for %s\n",
736 fdt_get_name(blob, src_node,
739 fdt_get_name(blob, node,
748 * Make sure that the arguments actually fit in the
749 * remaining property data length
751 if (list + count > list_end) {
752 debug("%s: arguments longer than property\n",
753 fdt_get_name(blob, src_node, NULL));
759 * All of the error cases above bail out of the loop, so at
760 * this point, the parsing is successful. If the requested
761 * index matches, then fill the out_args structure and return,
762 * or return -ENOENT for an empty entry.
765 if (cur_index == index) {
772 if (count > MAX_PHANDLE_ARGS) {
773 debug("%s: too many arguments %d\n",
774 fdt_get_name(blob, src_node,
776 count = MAX_PHANDLE_ARGS;
778 out_args->node = node;
779 out_args->args_count = count;
780 for (i = 0; i < count; i++) {
782 be32_to_cpup(list++);
786 /* Found it! return success */
796 * Result will be one of:
797 * -ENOENT : index is for empty phandle
798 * -EINVAL : parsing error on data
799 * [1..n] : Number of phandle (count mode; when index = -1)
801 rc = index < 0 ? cur_index : -ENOENT;
806 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
807 u8 *array, int count)
812 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
814 memcpy(array, cell, count);
818 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
819 const char *prop_name, int count)
824 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
830 int fdtdec_get_config_int(const void *blob, const char *prop_name,
835 debug("%s: %s\n", __func__, prop_name);
836 config_node = fdt_path_offset(blob, "/config");
839 return fdtdec_get_int(blob, config_node, prop_name, default_val);
842 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
847 debug("%s: %s\n", __func__, prop_name);
848 config_node = fdt_path_offset(blob, "/config");
851 prop = fdt_get_property(blob, config_node, prop_name, NULL);
856 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
862 debug("%s: %s\n", __func__, prop_name);
863 nodeoffset = fdt_path_offset(blob, "/config");
867 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
871 return (char *)nodep;
874 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
875 fdt_addr_t *basep, fdt_size_t *sizep)
877 const fdt_addr_t *cell;
880 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
882 cell = fdt_getprop(blob, node, prop_name, &len);
883 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
884 debug("cell=%p, len=%d\n", cell, len);
888 *basep = fdt_addr_to_cpu(*cell);
889 *sizep = fdt_size_to_cpu(cell[1]);
890 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
897 * Read a flash entry from the fdt
899 * @param blob FDT blob
900 * @param node Offset of node to read
901 * @param name Name of node being read
902 * @param entry Place to put offset and size of this node
903 * @return 0 if ok, -ve on error
905 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
906 struct fmap_entry *entry)
911 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
912 debug("Node '%s' has bad/missing 'reg' property\n", name);
913 return -FDT_ERR_NOTFOUND;
915 entry->offset = reg[0];
916 entry->length = reg[1];
917 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
918 prop = fdt_getprop(blob, node, "compress", NULL);
919 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
920 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
921 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
922 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
923 entry->hash = (uint8_t *)prop;
928 static u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
933 number = (number << 32) | fdt32_to_cpu(*ptr++);
938 int fdt_get_resource(const void *fdt, int node, const char *property,
939 unsigned int index, struct fdt_resource *res)
941 const fdt32_t *ptr, *end;
942 int na, ns, len, parent;
945 parent = fdt_parent_offset(fdt, node);
949 na = fdt_address_cells(fdt, parent);
950 ns = fdt_size_cells(fdt, parent);
952 ptr = fdt_getprop(fdt, node, property, &len);
956 end = ptr + len / sizeof(*ptr);
958 while (ptr + na + ns <= end) {
960 res->start = res->end = fdtdec_get_number(ptr, na);
961 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
969 return -FDT_ERR_NOTFOUND;
972 int fdt_get_named_resource(const void *fdt, int node, const char *property,
973 const char *prop_names, const char *name,
974 struct fdt_resource *res)
978 index = fdt_find_string(fdt, node, prop_names, name);
982 return fdt_get_resource(fdt, node, property, index, res);
985 int fdtdec_decode_memory_region(const void *blob, int config_node,
986 const char *mem_type, const char *suffix,
987 fdt_addr_t *basep, fdt_size_t *sizep)
991 fdt_size_t size, offset_size;
992 fdt_addr_t base, offset;
995 if (config_node == -1) {
996 config_node = fdt_path_offset(blob, "/config");
997 if (config_node < 0) {
998 debug("%s: Cannot find /config node\n", __func__);
1005 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1007 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1009 debug("%s: No memory type for '%s', using /memory\n", __func__,
1014 node = fdt_path_offset(blob, mem);
1016 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1017 fdt_strerror(node));
1022 * Not strictly correct - the memory may have multiple banks. We just
1025 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1026 debug("%s: Failed to decode memory region %s\n", __func__,
1031 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1033 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1035 debug("%s: Failed to decode memory region '%s'\n", __func__,
1040 *basep = base + offset;
1041 *sizep = offset_size;