2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <linux/ctype.h>
14 DECLARE_GLOBAL_DATA_PTR;
17 * Here are the type we know about. One day we might allow drivers to
18 * register. For now we just put them here. The COMPAT macro allows us to
19 * turn this into a sparse list later, and keeps the ID with the name.
21 #define COMPAT(id, name) name
22 static const char * const compat_names[COMPAT_COUNT] = {
23 COMPAT(UNKNOWN, "<none>"),
24 COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
25 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
26 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
27 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
28 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
29 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
30 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
31 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
32 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
33 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
34 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
35 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
36 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"),
37 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"),
38 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"),
39 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-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(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
46 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
47 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"),
48 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
49 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
50 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
51 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
52 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
53 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
54 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
55 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
56 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
57 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
58 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
59 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
60 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
61 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"),
62 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
63 COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"),
64 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
65 COMPAT(TI_TPS65090, "ti,tps65090"),
66 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"),
67 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
68 COMPAT(PARADE_PS8625, "parade,ps8625"),
69 COMPAT(INTEL_MICROCODE, "intel,microcode"),
70 COMPAT(MEMORY_SPD, "memory-spd"),
71 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
72 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
73 COMPAT(INTEL_GMA, "intel,gma"),
74 COMPAT(AMS_AS3722, "ams,as3722"),
75 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
76 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
77 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
78 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
81 const char *fdtdec_get_compatible(enum fdt_compat_id id)
83 /* We allow reading of the 'unknown' ID for testing purposes */
84 assert(id >= 0 && id < COMPAT_COUNT);
85 return compat_names[id];
88 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
89 const char *prop_name, fdt_size_t *sizep)
91 const fdt_addr_t *cell;
94 debug("%s: %s: ", __func__, prop_name);
95 cell = fdt_getprop(blob, node, prop_name, &len);
96 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
97 len == sizeof(fdt_addr_t) * 2)) {
98 fdt_addr_t addr = fdt_addr_to_cpu(*cell);
100 const fdt_size_t *size;
102 size = (fdt_size_t *)((char *)cell +
104 *sizep = fdt_size_to_cpu(*size);
105 debug("addr=%08lx, size=%08x\n",
106 (ulong)addr, *sizep);
108 debug("%08lx\n", (ulong)addr);
112 debug("(not found)\n");
113 return FDT_ADDR_T_NONE;
116 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
117 const char *prop_name)
119 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
123 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
124 const char *prop_name, struct fdt_pci_addr *addr)
130 debug("%s: %s: ", __func__, prop_name);
133 * If we follow the pci bus bindings strictly, we should check
134 * the value of the node's parent node's #address-cells and
135 * #size-cells. They need to be 3 and 2 accordingly. However,
136 * for simplicity we skip the check here.
138 cell = fdt_getprop(blob, node, prop_name, &len);
142 if ((len % FDT_PCI_REG_SIZE) == 0) {
143 int num = len / FDT_PCI_REG_SIZE;
146 for (i = 0; i < num; i++) {
147 debug("pci address #%d: %08lx %08lx %08lx\n", i,
148 (ulong)fdt_addr_to_cpu(cell[0]),
149 (ulong)fdt_addr_to_cpu(cell[1]),
150 (ulong)fdt_addr_to_cpu(cell[2]));
151 if ((fdt_addr_to_cpu(*cell) & type) == type) {
152 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
153 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
154 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
157 cell += (FDT_PCI_ADDR_CELLS +
173 debug("(not found)\n");
177 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
179 const char *list, *end;
182 list = fdt_getprop(blob, node, "compatible", &len);
191 if (len >= strlen("pciVVVV,DDDD")) {
192 s = strstr(list, "pci");
195 * check if the string is something like pciVVVV,DDDD.RR
196 * or just pciVVVV,DDDD
198 if (s && s[7] == ',' &&
199 (s[12] == '.' || s[12] == 0)) {
201 *vendor = simple_strtol(s, NULL, 16);
204 *device = simple_strtol(s, NULL, 16);
216 int fdtdec_get_pci_bdf(const void *blob, int node,
217 struct fdt_pci_addr *addr, pci_dev_t *bdf)
219 u16 dt_vendor, dt_device, vendor, device;
222 /* get vendor id & device id from the compatible string */
223 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
227 /* extract the bdf from fdt_pci_addr */
228 *bdf = addr->phys_hi & 0xffff00;
230 /* read vendor id & device id based on bdf */
231 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
232 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
235 * Note there are two places in the device tree to fully describe
236 * a pci device: one is via compatible string with a format of
237 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
238 * the device node's reg address property. We read the vendor id
239 * and device id based on bdf and compare the values with the
240 * "VVVV,DDDD". If they are the same, then we are good to use bdf
241 * to read device's bar. But if they are different, we have to rely
242 * on the vendor id and device id extracted from the compatible
243 * string and locate the real bdf by pci_find_device(). This is
244 * because normally we may only know device's device number and
245 * function number when writing device tree. The bus number is
246 * dynamically assigned during the pci enumeration process.
248 if ((dt_vendor != vendor) || (dt_device != device)) {
249 *bdf = pci_find_device(dt_vendor, dt_device, 0);
257 int fdtdec_get_pci_bar32(const void *blob, int node,
258 struct fdt_pci_addr *addr, u32 *bar)
264 /* get pci devices's bdf */
265 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
269 /* extract the bar number from fdt_pci_addr */
270 barnum = addr->phys_hi & 0xff;
271 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
274 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
275 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
281 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
282 uint64_t default_val)
284 const uint64_t *cell64;
287 cell64 = fdt_getprop(blob, node, prop_name, &length);
288 if (!cell64 || length < sizeof(*cell64))
291 return fdt64_to_cpu(*cell64);
294 int fdtdec_get_is_enabled(const void *blob, int node)
299 * It should say "okay", so only allow that. Some fdts use "ok" but
300 * this is a bug. Please fix your device tree source file. See here
303 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
305 cell = fdt_getprop(blob, node, "status", NULL);
307 return 0 == strcmp(cell, "okay");
311 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
313 enum fdt_compat_id id;
315 /* Search our drivers */
316 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
317 if (0 == fdt_node_check_compatible(blob, node,
320 return COMPAT_UNKNOWN;
323 int fdtdec_next_compatible(const void *blob, int node,
324 enum fdt_compat_id id)
326 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
329 int fdtdec_next_compatible_subnode(const void *blob, int node,
330 enum fdt_compat_id id, int *depthp)
333 node = fdt_next_node(blob, node, depthp);
334 } while (*depthp > 1);
336 /* If this is a direct subnode, and compatible, return it */
337 if (*depthp == 1 && 0 == fdt_node_check_compatible(
338 blob, node, compat_names[id]))
341 return -FDT_ERR_NOTFOUND;
344 int fdtdec_next_alias(const void *blob, const char *name,
345 enum fdt_compat_id id, int *upto)
347 #define MAX_STR_LEN 20
348 char str[MAX_STR_LEN + 20];
351 /* snprintf() is not available */
352 assert(strlen(name) < MAX_STR_LEN);
353 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
354 node = fdt_path_offset(blob, str);
357 err = fdt_node_check_compatible(blob, node, compat_names[id]);
361 return -FDT_ERR_NOTFOUND;
366 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
367 enum fdt_compat_id id, int *node_list, int maxcount)
369 memset(node_list, '\0', sizeof(*node_list) * maxcount);
371 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
374 /* TODO: Can we tighten this code up a little? */
375 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
376 enum fdt_compat_id id, int *node_list, int maxcount)
378 int name_len = strlen(name);
386 /* find the alias node if present */
387 alias_node = fdt_path_offset(blob, "/aliases");
390 * start with nothing, and we can assume that the root node can't
393 memset(nodes, '\0', sizeof(nodes));
395 /* First find all the compatible nodes */
396 for (node = count = 0; node >= 0 && count < maxcount;) {
397 node = fdtdec_next_compatible(blob, node, id);
399 nodes[count++] = node;
402 debug("%s: warning: maxcount exceeded with alias '%s'\n",
405 /* Now find all the aliases */
406 for (offset = fdt_first_property_offset(blob, alias_node);
408 offset = fdt_next_property_offset(blob, offset)) {
409 const struct fdt_property *prop;
415 prop = fdt_get_property_by_offset(blob, offset, NULL);
416 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
417 if (prop->len && 0 == strncmp(path, name, name_len))
418 node = fdt_path_offset(blob, prop->data);
422 /* Get the alias number */
423 number = simple_strtoul(path + name_len, NULL, 10);
424 if (number < 0 || number >= maxcount) {
425 debug("%s: warning: alias '%s' is out of range\n",
430 /* Make sure the node we found is actually in our list! */
432 for (j = 0; j < count; j++)
433 if (nodes[j] == node) {
439 debug("%s: warning: alias '%s' points to a node "
440 "'%s' that is missing or is not compatible "
441 " with '%s'\n", __func__, path,
442 fdt_get_name(blob, node, NULL),
448 * Add this node to our list in the right place, and mark
451 if (fdtdec_get_is_enabled(blob, node)) {
452 if (node_list[number]) {
453 debug("%s: warning: alias '%s' requires that "
454 "a node be placed in the list in a "
455 "position which is already filled by "
456 "node '%s'\n", __func__, path,
457 fdt_get_name(blob, node, NULL));
460 node_list[number] = node;
461 if (number >= num_found)
462 num_found = number + 1;
467 /* Add any nodes not mentioned by an alias */
468 for (i = j = 0; i < maxcount; i++) {
470 for (; j < maxcount; j++)
472 fdtdec_get_is_enabled(blob, nodes[j]))
475 /* Have we run out of nodes to add? */
479 assert(!node_list[i]);
480 node_list[i] = nodes[j++];
489 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
492 int base_len = strlen(base);
493 const char *find_name;
498 find_name = fdt_get_name(blob, offset, &find_namelen);
499 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
501 aliases = fdt_path_offset(blob, "/aliases");
502 for (prop_offset = fdt_first_property_offset(blob, aliases);
504 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
511 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
512 debug(" - %s, %s\n", name, prop);
513 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
514 strncmp(name, base, base_len))
517 slash = strrchr(prop, '/');
518 if (strcmp(slash + 1, find_name))
520 for (p = name + strlen(name) - 1; p > name; p--) {
522 *seqp = simple_strtoul(p + 1, NULL, 10);
523 debug("Found seq %d\n", *seqp);
529 debug("Not found\n");
533 int fdtdec_get_chosen_node(const void *blob, const char *name)
540 return -FDT_ERR_NOTFOUND;
541 chosen_node = fdt_path_offset(blob, "/chosen");
542 prop = fdt_getprop(blob, chosen_node, name, &len);
544 return -FDT_ERR_NOTFOUND;
545 return fdt_path_offset(blob, prop);
548 int fdtdec_check_fdt(void)
551 * We must have an FDT, but we cannot panic() yet since the console
552 * is not ready. So for now, just assert(). Boards which need an early
553 * FDT (prior to console ready) will need to make their own
554 * arrangements and do their own checks.
556 assert(!fdtdec_prepare_fdt());
561 * This function is a little odd in that it accesses global data. At some
562 * point if the architecture board.c files merge this will make more sense.
563 * Even now, it is common code.
565 int fdtdec_prepare_fdt(void)
567 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
568 fdt_check_header(gd->fdt_blob)) {
569 printf("No valid FDT found - please append one to U-Boot "
570 "binary, use u-boot-dtb.bin or define "
571 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
577 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
582 debug("%s: %s\n", __func__, prop_name);
583 phandle = fdt_getprop(blob, node, prop_name, NULL);
585 return -FDT_ERR_NOTFOUND;
587 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
592 * Look up a property in a node and check that it has a minimum length.
594 * @param blob FDT blob
595 * @param node node to examine
596 * @param prop_name name of property to find
597 * @param min_len minimum property length in bytes
598 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
599 found, or -FDT_ERR_BADLAYOUT if not enough data
600 * @return pointer to cell, which is only valid if err == 0
602 static const void *get_prop_check_min_len(const void *blob, int node,
603 const char *prop_name, int min_len, int *err)
608 debug("%s: %s\n", __func__, prop_name);
609 cell = fdt_getprop(blob, node, prop_name, &len);
611 *err = -FDT_ERR_NOTFOUND;
612 else if (len < min_len)
613 *err = -FDT_ERR_BADLAYOUT;
619 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
620 u32 *array, int count)
625 debug("%s: %s\n", __func__, prop_name);
626 cell = get_prop_check_min_len(blob, node, prop_name,
627 sizeof(u32) * count, &err);
629 for (i = 0; i < count; i++)
630 array[i] = fdt32_to_cpu(cell[i]);
635 int fdtdec_get_int_array_count(const void *blob, int node,
636 const char *prop_name, u32 *array, int count)
642 debug("%s: %s\n", __func__, prop_name);
643 cell = fdt_getprop(blob, node, prop_name, &len);
645 return -FDT_ERR_NOTFOUND;
646 elems = len / sizeof(u32);
649 for (i = 0; i < count; i++)
650 array[i] = fdt32_to_cpu(cell[i]);
655 const u32 *fdtdec_locate_array(const void *blob, int node,
656 const char *prop_name, int count)
661 cell = get_prop_check_min_len(blob, node, prop_name,
662 sizeof(u32) * count, &err);
663 return err ? NULL : cell;
666 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
671 debug("%s: %s\n", __func__, prop_name);
672 cell = fdt_getprop(blob, node, prop_name, &len);
676 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
677 const char *list_name,
678 const char *cells_name,
679 int cell_count, int index,
680 struct fdtdec_phandle_args *out_args)
682 const __be32 *list, *list_end;
683 int rc = 0, size, cur_index = 0;
688 /* Retrieve the phandle list property */
689 list = fdt_getprop(blob, src_node, list_name, &size);
692 list_end = list + size / sizeof(*list);
694 /* Loop over the phandles until all the requested entry is found */
695 while (list < list_end) {
700 * If phandle is 0, then it is an empty entry with no
701 * arguments. Skip forward to the next entry.
703 phandle = be32_to_cpup(list++);
706 * Find the provider node and parse the #*-cells
707 * property to determine the argument length.
709 * This is not needed if the cell count is hard-coded
710 * (i.e. cells_name not set, but cell_count is set),
711 * except when we're going to return the found node
714 if (cells_name || cur_index == index) {
715 node = fdt_node_offset_by_phandle(blob,
718 debug("%s: could not find phandle\n",
719 fdt_get_name(blob, src_node,
726 count = fdtdec_get_int(blob, node, cells_name,
729 debug("%s: could not get %s for %s\n",
730 fdt_get_name(blob, src_node,
733 fdt_get_name(blob, node,
742 * Make sure that the arguments actually fit in the
743 * remaining property data length
745 if (list + count > list_end) {
746 debug("%s: arguments longer than property\n",
747 fdt_get_name(blob, src_node, NULL));
753 * All of the error cases above bail out of the loop, so at
754 * this point, the parsing is successful. If the requested
755 * index matches, then fill the out_args structure and return,
756 * or return -ENOENT for an empty entry.
759 if (cur_index == index) {
766 if (count > MAX_PHANDLE_ARGS) {
767 debug("%s: too many arguments %d\n",
768 fdt_get_name(blob, src_node,
770 count = MAX_PHANDLE_ARGS;
772 out_args->node = node;
773 out_args->args_count = count;
774 for (i = 0; i < count; i++) {
776 be32_to_cpup(list++);
780 /* Found it! return success */
790 * Result will be one of:
791 * -ENOENT : index is for empty phandle
792 * -EINVAL : parsing error on data
793 * [1..n] : Number of phandle (count mode; when index = -1)
795 rc = index < 0 ? cur_index : -ENOENT;
800 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
801 u8 *array, int count)
806 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
808 memcpy(array, cell, count);
812 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
813 const char *prop_name, int count)
818 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
824 int fdtdec_get_config_int(const void *blob, const char *prop_name,
829 debug("%s: %s\n", __func__, prop_name);
830 config_node = fdt_path_offset(blob, "/config");
833 return fdtdec_get_int(blob, config_node, prop_name, default_val);
836 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
841 debug("%s: %s\n", __func__, prop_name);
842 config_node = fdt_path_offset(blob, "/config");
845 prop = fdt_get_property(blob, config_node, prop_name, NULL);
850 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
856 debug("%s: %s\n", __func__, prop_name);
857 nodeoffset = fdt_path_offset(blob, "/config");
861 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
865 return (char *)nodep;
868 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
869 fdt_addr_t *basep, fdt_size_t *sizep)
871 const fdt_addr_t *cell;
874 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
876 cell = fdt_getprop(blob, node, prop_name, &len);
877 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
878 debug("cell=%p, len=%d\n", cell, len);
882 *basep = fdt_addr_to_cpu(*cell);
883 *sizep = fdt_size_to_cpu(cell[1]);
884 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
891 * Read a flash entry from the fdt
893 * @param blob FDT blob
894 * @param node Offset of node to read
895 * @param name Name of node being read
896 * @param entry Place to put offset and size of this node
897 * @return 0 if ok, -ve on error
899 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
900 struct fmap_entry *entry)
905 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
906 debug("Node '%s' has bad/missing 'reg' property\n", name);
907 return -FDT_ERR_NOTFOUND;
909 entry->offset = reg[0];
910 entry->length = reg[1];
911 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
912 prop = fdt_getprop(blob, node, "compress", NULL);
913 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
914 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
915 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
916 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
917 entry->hash = (uint8_t *)prop;
922 u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
927 number = (number << 32) | fdt32_to_cpu(*ptr++);
932 int fdt_get_resource(const void *fdt, int node, const char *property,
933 unsigned int index, struct fdt_resource *res)
935 const fdt32_t *ptr, *end;
936 int na, ns, len, parent;
939 parent = fdt_parent_offset(fdt, node);
943 na = fdt_address_cells(fdt, parent);
944 ns = fdt_size_cells(fdt, parent);
946 ptr = fdt_getprop(fdt, node, property, &len);
950 end = ptr + len / sizeof(*ptr);
952 while (ptr + na + ns <= end) {
954 res->start = res->end = fdtdec_get_number(ptr, na);
955 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
963 return -FDT_ERR_NOTFOUND;
966 int fdt_get_named_resource(const void *fdt, int node, const char *property,
967 const char *prop_names, const char *name,
968 struct fdt_resource *res)
972 index = fdt_find_string(fdt, node, prop_names, name);
976 return fdt_get_resource(fdt, node, property, index, res);
979 int fdtdec_decode_memory_region(const void *blob, int config_node,
980 const char *mem_type, const char *suffix,
981 fdt_addr_t *basep, fdt_size_t *sizep)
985 fdt_size_t size, offset_size;
986 fdt_addr_t base, offset;
989 if (config_node == -1) {
990 config_node = fdt_path_offset(blob, "/config");
991 if (config_node < 0) {
992 debug("%s: Cannot find /config node\n", __func__);
999 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1001 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1003 debug("%s: No memory type for '%s', using /memory\n", __func__,
1008 node = fdt_path_offset(blob, mem);
1010 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1011 fdt_strerror(node));
1016 * Not strictly correct - the memory may have multiple banks. We just
1019 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1020 debug("%s: Failed to decode memory region %s\n", __func__,
1025 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1027 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1029 debug("%s: Failed to decode memory region '%s'\n", __func__,
1034 *basep = base + offset;
1035 *sizep = offset_size;