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, "google,cros-ec"),
46 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
47 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
48 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"),
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_pmic"),
59 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
60 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
61 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
62 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"),
63 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
64 COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"),
65 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
66 COMPAT(TI_TPS65090, "ti,tps65090"),
67 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"),
68 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
69 COMPAT(PARADE_PS8625, "parade,ps8625"),
70 COMPAT(COMPAT_INTEL_LPC, "intel,lpc"),
71 COMPAT(INTEL_MICROCODE, "intel,microcode"),
72 COMPAT(MEMORY_SPD, "memory-spd"),
73 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
74 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
75 COMPAT(INTEL_GMA, "intel,gma"),
76 COMPAT(AMS_AS3722, "ams,as3722"),
77 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
80 const char *fdtdec_get_compatible(enum fdt_compat_id id)
82 /* We allow reading of the 'unknown' ID for testing purposes */
83 assert(id >= 0 && id < COMPAT_COUNT);
84 return compat_names[id];
87 fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
88 const char *prop_name, fdt_size_t *sizep)
90 const fdt_addr_t *cell;
93 debug("%s: %s: ", __func__, prop_name);
94 cell = fdt_getprop(blob, node, prop_name, &len);
95 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
96 len == sizeof(fdt_addr_t) * 2)) {
97 fdt_addr_t addr = fdt_addr_to_cpu(*cell);
99 const fdt_size_t *size;
101 size = (fdt_size_t *)((char *)cell +
103 *sizep = fdt_size_to_cpu(*size);
104 debug("addr=%08lx, size=%08x\n",
105 (ulong)addr, *sizep);
107 debug("%08lx\n", (ulong)addr);
111 debug("(not found)\n");
112 return FDT_ADDR_T_NONE;
115 fdt_addr_t fdtdec_get_addr(const void *blob, int node,
116 const char *prop_name)
118 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
122 int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
123 const char *prop_name, struct fdt_pci_addr *addr)
129 debug("%s: %s: ", __func__, prop_name);
132 * If we follow the pci bus bindings strictly, we should check
133 * the value of the node's parent node's #address-cells and
134 * #size-cells. They need to be 3 and 2 accordingly. However,
135 * for simplicity we skip the check here.
137 cell = fdt_getprop(blob, node, prop_name, &len);
141 if ((len % FDT_PCI_REG_SIZE) == 0) {
142 int num = len / FDT_PCI_REG_SIZE;
145 for (i = 0; i < num; i++) {
146 debug("pci address #%d: %08lx %08lx %08lx\n", i,
147 (ulong)fdt_addr_to_cpu(cell[0]),
148 (ulong)fdt_addr_to_cpu(cell[1]),
149 (ulong)fdt_addr_to_cpu(cell[2]));
150 if ((fdt_addr_to_cpu(*cell) & type) == type) {
151 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
152 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
153 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
156 cell += (FDT_PCI_ADDR_CELLS +
170 debug("(not found)\n");
174 int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
176 const char *list, *end;
179 list = fdt_getprop(blob, node, "compatible", &len);
188 if (len >= strlen("pciVVVV,DDDD")) {
189 s = strstr(list, "pci");
192 * check if the string is something like pciVVVV,DDDD.RR
193 * or just pciVVVV,DDDD
195 if (s && s[7] == ',' &&
196 (s[12] == '.' || s[12] == 0)) {
198 *vendor = simple_strtol(s, NULL, 16);
201 *device = simple_strtol(s, NULL, 16);
213 int fdtdec_get_pci_bdf(const void *blob, int node,
214 struct fdt_pci_addr *addr, pci_dev_t *bdf)
216 u16 dt_vendor, dt_device, vendor, device;
219 /* get vendor id & device id from the compatible string */
220 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
224 /* extract the bdf from fdt_pci_addr */
225 *bdf = addr->phys_hi & 0xffff00;
227 /* read vendor id & device id based on bdf */
228 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
229 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
232 * Note there are two places in the device tree to fully describe
233 * a pci device: one is via compatible string with a format of
234 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
235 * the device node's reg address property. We read the vendor id
236 * and device id based on bdf and compare the values with the
237 * "VVVV,DDDD". If they are the same, then we are good to use bdf
238 * to read device's bar. But if they are different, we have to rely
239 * on the vendor id and device id extracted from the compatible
240 * string and locate the real bdf by pci_find_device(). This is
241 * because normally we may only know device's device number and
242 * function number when writing device tree. The bus number is
243 * dynamically assigned during the pci enumeration process.
245 if ((dt_vendor != vendor) || (dt_device != device)) {
246 *bdf = pci_find_device(dt_vendor, dt_device, 0);
254 int fdtdec_get_pci_bar32(const void *blob, int node,
255 struct fdt_pci_addr *addr, u32 *bar)
261 /* get pci devices's bdf */
262 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
266 /* extract the bar number from fdt_pci_addr */
267 barnum = addr->phys_hi & 0xff;
268 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
271 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
272 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
278 uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
279 uint64_t default_val)
281 const uint64_t *cell64;
284 cell64 = fdt_getprop(blob, node, prop_name, &length);
285 if (!cell64 || length < sizeof(*cell64))
288 return fdt64_to_cpu(*cell64);
291 int fdtdec_get_is_enabled(const void *blob, int node)
296 * It should say "okay", so only allow that. Some fdts use "ok" but
297 * this is a bug. Please fix your device tree source file. See here
300 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
302 cell = fdt_getprop(blob, node, "status", NULL);
304 return 0 == strcmp(cell, "okay");
308 enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
310 enum fdt_compat_id id;
312 /* Search our drivers */
313 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
314 if (0 == fdt_node_check_compatible(blob, node,
317 return COMPAT_UNKNOWN;
320 int fdtdec_next_compatible(const void *blob, int node,
321 enum fdt_compat_id id)
323 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
326 int fdtdec_next_compatible_subnode(const void *blob, int node,
327 enum fdt_compat_id id, int *depthp)
330 node = fdt_next_node(blob, node, depthp);
331 } while (*depthp > 1);
333 /* If this is a direct subnode, and compatible, return it */
334 if (*depthp == 1 && 0 == fdt_node_check_compatible(
335 blob, node, compat_names[id]))
338 return -FDT_ERR_NOTFOUND;
341 int fdtdec_next_alias(const void *blob, const char *name,
342 enum fdt_compat_id id, int *upto)
344 #define MAX_STR_LEN 20
345 char str[MAX_STR_LEN + 20];
348 /* snprintf() is not available */
349 assert(strlen(name) < MAX_STR_LEN);
350 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
351 node = fdt_path_offset(blob, str);
354 err = fdt_node_check_compatible(blob, node, compat_names[id]);
358 return -FDT_ERR_NOTFOUND;
363 int fdtdec_find_aliases_for_id(const void *blob, const char *name,
364 enum fdt_compat_id id, int *node_list, int maxcount)
366 memset(node_list, '\0', sizeof(*node_list) * maxcount);
368 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
371 /* TODO: Can we tighten this code up a little? */
372 int fdtdec_add_aliases_for_id(const void *blob, const char *name,
373 enum fdt_compat_id id, int *node_list, int maxcount)
375 int name_len = strlen(name);
383 /* find the alias node if present */
384 alias_node = fdt_path_offset(blob, "/aliases");
387 * start with nothing, and we can assume that the root node can't
390 memset(nodes, '\0', sizeof(nodes));
392 /* First find all the compatible nodes */
393 for (node = count = 0; node >= 0 && count < maxcount;) {
394 node = fdtdec_next_compatible(blob, node, id);
396 nodes[count++] = node;
399 debug("%s: warning: maxcount exceeded with alias '%s'\n",
402 /* Now find all the aliases */
403 for (offset = fdt_first_property_offset(blob, alias_node);
405 offset = fdt_next_property_offset(blob, offset)) {
406 const struct fdt_property *prop;
412 prop = fdt_get_property_by_offset(blob, offset, NULL);
413 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
414 if (prop->len && 0 == strncmp(path, name, name_len))
415 node = fdt_path_offset(blob, prop->data);
419 /* Get the alias number */
420 number = simple_strtoul(path + name_len, NULL, 10);
421 if (number < 0 || number >= maxcount) {
422 debug("%s: warning: alias '%s' is out of range\n",
427 /* Make sure the node we found is actually in our list! */
429 for (j = 0; j < count; j++)
430 if (nodes[j] == node) {
436 debug("%s: warning: alias '%s' points to a node "
437 "'%s' that is missing or is not compatible "
438 " with '%s'\n", __func__, path,
439 fdt_get_name(blob, node, NULL),
445 * Add this node to our list in the right place, and mark
448 if (fdtdec_get_is_enabled(blob, node)) {
449 if (node_list[number]) {
450 debug("%s: warning: alias '%s' requires that "
451 "a node be placed in the list in a "
452 "position which is already filled by "
453 "node '%s'\n", __func__, path,
454 fdt_get_name(blob, node, NULL));
457 node_list[number] = node;
458 if (number >= num_found)
459 num_found = number + 1;
464 /* Add any nodes not mentioned by an alias */
465 for (i = j = 0; i < maxcount; i++) {
467 for (; j < maxcount; j++)
469 fdtdec_get_is_enabled(blob, nodes[j]))
472 /* Have we run out of nodes to add? */
476 assert(!node_list[i]);
477 node_list[i] = nodes[j++];
486 int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
489 int base_len = strlen(base);
490 const char *find_name;
495 find_name = fdt_get_name(blob, offset, &find_namelen);
496 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
498 aliases = fdt_path_offset(blob, "/aliases");
499 for (prop_offset = fdt_first_property_offset(blob, aliases);
501 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
508 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
509 debug(" - %s, %s\n", name, prop);
510 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
511 strncmp(name, base, base_len))
514 slash = strrchr(prop, '/');
515 if (strcmp(slash + 1, find_name))
517 for (p = name + strlen(name) - 1; p > name; p--) {
519 *seqp = simple_strtoul(p + 1, NULL, 10);
520 debug("Found seq %d\n", *seqp);
526 debug("Not found\n");
530 int fdtdec_get_chosen_node(const void *blob, const char *name)
537 return -FDT_ERR_NOTFOUND;
538 chosen_node = fdt_path_offset(blob, "/chosen");
539 prop = fdt_getprop(blob, chosen_node, name, &len);
541 return -FDT_ERR_NOTFOUND;
542 return fdt_path_offset(blob, prop);
545 int fdtdec_check_fdt(void)
548 * We must have an FDT, but we cannot panic() yet since the console
549 * is not ready. So for now, just assert(). Boards which need an early
550 * FDT (prior to console ready) will need to make their own
551 * arrangements and do their own checks.
553 assert(!fdtdec_prepare_fdt());
558 * This function is a little odd in that it accesses global data. At some
559 * point if the architecture board.c files merge this will make more sense.
560 * Even now, it is common code.
562 int fdtdec_prepare_fdt(void)
564 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
565 fdt_check_header(gd->fdt_blob)) {
566 printf("No valid FDT found - please append one to U-Boot "
567 "binary, use u-boot-dtb.bin or define "
568 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
574 int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
579 debug("%s: %s\n", __func__, prop_name);
580 phandle = fdt_getprop(blob, node, prop_name, NULL);
582 return -FDT_ERR_NOTFOUND;
584 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
589 * Look up a property in a node and check that it has a minimum length.
591 * @param blob FDT blob
592 * @param node node to examine
593 * @param prop_name name of property to find
594 * @param min_len minimum property length in bytes
595 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
596 found, or -FDT_ERR_BADLAYOUT if not enough data
597 * @return pointer to cell, which is only valid if err == 0
599 static const void *get_prop_check_min_len(const void *blob, int node,
600 const char *prop_name, int min_len, int *err)
605 debug("%s: %s\n", __func__, prop_name);
606 cell = fdt_getprop(blob, node, prop_name, &len);
608 *err = -FDT_ERR_NOTFOUND;
609 else if (len < min_len)
610 *err = -FDT_ERR_BADLAYOUT;
616 int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
617 u32 *array, int count)
622 debug("%s: %s\n", __func__, prop_name);
623 cell = get_prop_check_min_len(blob, node, prop_name,
624 sizeof(u32) * count, &err);
626 for (i = 0; i < count; i++)
627 array[i] = fdt32_to_cpu(cell[i]);
632 int fdtdec_get_int_array_count(const void *blob, int node,
633 const char *prop_name, u32 *array, int count)
639 debug("%s: %s\n", __func__, prop_name);
640 cell = fdt_getprop(blob, node, prop_name, &len);
642 return -FDT_ERR_NOTFOUND;
643 elems = len / sizeof(u32);
646 for (i = 0; i < count; i++)
647 array[i] = fdt32_to_cpu(cell[i]);
652 const u32 *fdtdec_locate_array(const void *blob, int node,
653 const char *prop_name, int count)
658 cell = get_prop_check_min_len(blob, node, prop_name,
659 sizeof(u32) * count, &err);
660 return err ? NULL : cell;
663 int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
668 debug("%s: %s\n", __func__, prop_name);
669 cell = fdt_getprop(blob, node, prop_name, &len);
673 int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
674 const char *list_name,
675 const char *cells_name,
676 int cell_count, int index,
677 struct fdtdec_phandle_args *out_args)
679 const __be32 *list, *list_end;
680 int rc = 0, size, cur_index = 0;
685 /* Retrieve the phandle list property */
686 list = fdt_getprop(blob, src_node, list_name, &size);
689 list_end = list + size / sizeof(*list);
691 /* Loop over the phandles until all the requested entry is found */
692 while (list < list_end) {
697 * If phandle is 0, then it is an empty entry with no
698 * arguments. Skip forward to the next entry.
700 phandle = be32_to_cpup(list++);
703 * Find the provider node and parse the #*-cells
704 * property to determine the argument length.
706 * This is not needed if the cell count is hard-coded
707 * (i.e. cells_name not set, but cell_count is set),
708 * except when we're going to return the found node
711 if (cells_name || cur_index == index) {
712 node = fdt_node_offset_by_phandle(blob,
715 debug("%s: could not find phandle\n",
716 fdt_get_name(blob, src_node,
723 count = fdtdec_get_int(blob, node, cells_name,
726 debug("%s: could not get %s for %s\n",
727 fdt_get_name(blob, src_node,
730 fdt_get_name(blob, node,
739 * Make sure that the arguments actually fit in the
740 * remaining property data length
742 if (list + count > list_end) {
743 debug("%s: arguments longer than property\n",
744 fdt_get_name(blob, src_node, NULL));
750 * All of the error cases above bail out of the loop, so at
751 * this point, the parsing is successful. If the requested
752 * index matches, then fill the out_args structure and return,
753 * or return -ENOENT for an empty entry.
756 if (cur_index == index) {
763 if (count > MAX_PHANDLE_ARGS) {
764 debug("%s: too many arguments %d\n",
765 fdt_get_name(blob, src_node,
767 count = MAX_PHANDLE_ARGS;
769 out_args->node = node;
770 out_args->args_count = count;
771 for (i = 0; i < count; i++) {
773 be32_to_cpup(list++);
777 /* Found it! return success */
787 * Result will be one of:
788 * -ENOENT : index is for empty phandle
789 * -EINVAL : parsing error on data
790 * [1..n] : Number of phandle (count mode; when index = -1)
792 rc = index < 0 ? cur_index : -ENOENT;
797 int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
798 u8 *array, int count)
803 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
805 memcpy(array, cell, count);
809 const u8 *fdtdec_locate_byte_array(const void *blob, int node,
810 const char *prop_name, int count)
815 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
821 int fdtdec_get_config_int(const void *blob, const char *prop_name,
826 debug("%s: %s\n", __func__, prop_name);
827 config_node = fdt_path_offset(blob, "/config");
830 return fdtdec_get_int(blob, config_node, prop_name, default_val);
833 int fdtdec_get_config_bool(const void *blob, const char *prop_name)
838 debug("%s: %s\n", __func__, prop_name);
839 config_node = fdt_path_offset(blob, "/config");
842 prop = fdt_get_property(blob, config_node, prop_name, NULL);
847 char *fdtdec_get_config_string(const void *blob, const char *prop_name)
853 debug("%s: %s\n", __func__, prop_name);
854 nodeoffset = fdt_path_offset(blob, "/config");
858 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
862 return (char *)nodep;
865 int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
866 fdt_addr_t *basep, fdt_size_t *sizep)
868 const fdt_addr_t *cell;
871 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
873 cell = fdt_getprop(blob, node, prop_name, &len);
874 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
875 debug("cell=%p, len=%d\n", cell, len);
879 *basep = fdt_addr_to_cpu(*cell);
880 *sizep = fdt_size_to_cpu(cell[1]);
881 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
888 * Read a flash entry from the fdt
890 * @param blob FDT blob
891 * @param node Offset of node to read
892 * @param name Name of node being read
893 * @param entry Place to put offset and size of this node
894 * @return 0 if ok, -ve on error
896 int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
897 struct fmap_entry *entry)
902 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
903 debug("Node '%s' has bad/missing 'reg' property\n", name);
904 return -FDT_ERR_NOTFOUND;
906 entry->offset = reg[0];
907 entry->length = reg[1];
908 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
909 prop = fdt_getprop(blob, node, "compress", NULL);
910 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
911 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
912 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
913 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
914 entry->hash = (uint8_t *)prop;
919 static u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
924 number = (number << 32) | fdt32_to_cpu(*ptr++);
929 int fdt_get_resource(const void *fdt, int node, const char *property,
930 unsigned int index, struct fdt_resource *res)
932 const fdt32_t *ptr, *end;
933 int na, ns, len, parent;
936 parent = fdt_parent_offset(fdt, node);
940 na = fdt_address_cells(fdt, parent);
941 ns = fdt_size_cells(fdt, parent);
943 ptr = fdt_getprop(fdt, node, property, &len);
947 end = ptr + len / sizeof(*ptr);
949 while (ptr + na + ns <= end) {
951 res->start = res->end = fdtdec_get_number(ptr, na);
952 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
960 return -FDT_ERR_NOTFOUND;
963 int fdt_get_named_resource(const void *fdt, int node, const char *property,
964 const char *prop_names, const char *name,
965 struct fdt_resource *res)
969 index = fdt_find_string(fdt, node, prop_names, name);
973 return fdt_get_resource(fdt, node, property, index, res);
976 int fdtdec_decode_memory_region(const void *blob, int config_node,
977 const char *mem_type, const char *suffix,
978 fdt_addr_t *basep, fdt_size_t *sizep)
982 fdt_size_t size, offset_size;
983 fdt_addr_t base, offset;
986 if (config_node == -1) {
987 config_node = fdt_path_offset(blob, "/config");
988 if (config_node < 0) {
989 debug("%s: Cannot find /config node\n", __func__);
996 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
998 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1000 debug("%s: No memory type for '%s', using /memory\n", __func__,
1005 node = fdt_path_offset(blob, mem);
1007 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1008 fdt_strerror(node));
1013 * Not strictly correct - the memory may have multiple banks. We just
1016 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1017 debug("%s: Failed to decode memory region %s\n", __func__,
1022 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1024 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1026 debug("%s: Failed to decode memory region '%s'\n", __func__,
1031 *basep = base + offset;
1032 *sizep = offset_size;