2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <fdt_support.h>
14 #include <asm/sections.h>
15 #include <linux/ctype.h>
17 DECLARE_GLOBAL_DATA_PTR
;
20 * Here are the type we know about. One day we might allow drivers to
21 * register. For now we just put them here. The COMPAT macro allows us to
22 * turn this into a sparse list later, and keeps the ID with the name.
24 * NOTE: This list is basically a TODO list for things that need to be
25 * converted to driver model. So don't add new things here unless there is a
26 * good reason why driver-model conversion is infeasible. Examples include
27 * things which are used before driver model is available.
29 #define COMPAT(id, name) name
30 static const char * const compat_names
[COMPAT_COUNT
] = {
31 COMPAT(UNKNOWN
, "<none>"),
32 COMPAT(NVIDIA_TEGRA20_EMC
, "nvidia,tegra20-emc"),
33 COMPAT(NVIDIA_TEGRA20_EMC_TABLE
, "nvidia,tegra20-emc-table"),
34 COMPAT(NVIDIA_TEGRA20_NAND
, "nvidia,tegra20-nand"),
35 COMPAT(NVIDIA_TEGRA124_PMC
, "nvidia,tegra124-pmc"),
36 COMPAT(NVIDIA_TEGRA186_SDMMC
, "nvidia,tegra186-sdhci"),
37 COMPAT(NVIDIA_TEGRA210_SDMMC
, "nvidia,tegra210-sdhci"),
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_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(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_MIPI_DSI
, "samsung,exynos-mipi-dsi"),
52 COMPAT(SAMSUNG_EXYNOS_DWMMC
, "samsung,exynos-dwmmc"),
53 COMPAT(SAMSUNG_EXYNOS_MMC
, "samsung,exynos-mmc"),
54 COMPAT(MAXIM_MAX77686_PMIC
, "maxim,max77686"),
55 COMPAT(GENERIC_SPI_FLASH
, "spi-flash"),
56 COMPAT(MAXIM_98095_CODEC
, "maxim,max98095-codec"),
57 COMPAT(SAMSUNG_EXYNOS5_I2C
, "samsung,exynos5-hsi2c"),
58 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
59 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
60 COMPAT(AMS_AS3722
, "ams,as3722"),
61 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
62 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
63 COMPAT(ALTERA_SOCFPGA_DWMAC
, "altr,socfpga-stmmac"),
64 COMPAT(ALTERA_SOCFPGA_DWMMC
, "altr,socfpga-dw-mshc"),
65 COMPAT(ALTERA_SOCFPGA_DWC2USB
, "snps,dwc2"),
66 COMPAT(INTEL_BAYTRAIL_FSP
, "intel,baytrail-fsp"),
67 COMPAT(INTEL_BAYTRAIL_FSP_MDP
, "intel,baytrail-fsp-mdp"),
68 COMPAT(INTEL_IVYBRIDGE_FSP
, "intel,ivybridge-fsp"),
69 COMPAT(COMPAT_SUNXI_NAND
, "allwinner,sun4i-a10-nand"),
72 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
74 /* We allow reading of the 'unknown' ID for testing purposes */
75 assert(id
>= 0 && id
< COMPAT_COUNT
);
76 return compat_names
[id
];
79 fdt_addr_t
fdtdec_get_addr_size_fixed(const void *blob
, int node
,
80 const char *prop_name
, int index
, int na
, int ns
,
81 fdt_size_t
*sizep
, bool translate
)
83 const fdt32_t
*prop
, *prop_end
;
84 const fdt32_t
*prop_addr
, *prop_size
, *prop_after_size
;
88 debug("%s: %s: ", __func__
, prop_name
);
90 if (na
> (sizeof(fdt_addr_t
) / sizeof(fdt32_t
))) {
91 debug("(na too large for fdt_addr_t type)\n");
92 return FDT_ADDR_T_NONE
;
95 if (ns
> (sizeof(fdt_size_t
) / sizeof(fdt32_t
))) {
96 debug("(ns too large for fdt_size_t type)\n");
97 return FDT_ADDR_T_NONE
;
100 prop
= fdt_getprop(blob
, node
, prop_name
, &len
);
102 debug("(not found)\n");
103 return FDT_ADDR_T_NONE
;
105 prop_end
= prop
+ (len
/ sizeof(*prop
));
107 prop_addr
= prop
+ (index
* (na
+ ns
));
108 prop_size
= prop_addr
+ na
;
109 prop_after_size
= prop_size
+ ns
;
110 if (prop_after_size
> prop_end
) {
111 debug("(not enough data: expected >= %d cells, got %d cells)\n",
112 (u32
)(prop_after_size
- prop
), ((u32
)(prop_end
- prop
)));
113 return FDT_ADDR_T_NONE
;
116 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_OF_LIBFDT)
118 addr
= fdt_translate_address(blob
, node
, prop_addr
);
121 addr
= fdtdec_get_number(prop_addr
, na
);
124 *sizep
= fdtdec_get_number(prop_size
, ns
);
125 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr
,
126 (unsigned long long)*sizep
);
128 debug("addr=%08llx\n", (unsigned long long)addr
);
134 fdt_addr_t
fdtdec_get_addr_size_auto_parent(const void *blob
, int parent
,
135 int node
, const char *prop_name
, int index
, fdt_size_t
*sizep
,
140 debug("%s: ", __func__
);
142 na
= fdt_address_cells(blob
, parent
);
144 debug("(bad #address-cells)\n");
145 return FDT_ADDR_T_NONE
;
148 ns
= fdt_size_cells(blob
, parent
);
150 debug("(bad #size-cells)\n");
151 return FDT_ADDR_T_NONE
;
154 debug("na=%d, ns=%d, ", na
, ns
);
156 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, index
, na
,
157 ns
, sizep
, translate
);
160 fdt_addr_t
fdtdec_get_addr_size_auto_noparent(const void *blob
, int node
,
161 const char *prop_name
, int index
, fdt_size_t
*sizep
,
166 debug("%s: ", __func__
);
168 parent
= fdt_parent_offset(blob
, node
);
170 debug("(no parent found)\n");
171 return FDT_ADDR_T_NONE
;
174 return fdtdec_get_addr_size_auto_parent(blob
, parent
, node
, prop_name
,
175 index
, sizep
, translate
);
178 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
179 const char *prop_name
, fdt_size_t
*sizep
)
181 int ns
= sizep
? (sizeof(fdt_size_t
) / sizeof(fdt32_t
)) : 0;
183 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, 0,
184 sizeof(fdt_addr_t
) / sizeof(fdt32_t
),
188 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
189 const char *prop_name
)
191 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
194 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
195 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
196 const char *prop_name
, struct fdt_pci_addr
*addr
)
202 debug("%s: %s: ", __func__
, prop_name
);
205 * If we follow the pci bus bindings strictly, we should check
206 * the value of the node's parent node's #address-cells and
207 * #size-cells. They need to be 3 and 2 accordingly. However,
208 * for simplicity we skip the check here.
210 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
214 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
215 int num
= len
/ FDT_PCI_REG_SIZE
;
218 for (i
= 0; i
< num
; i
++) {
219 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
220 (ulong
)fdt32_to_cpu(cell
[0]),
221 (ulong
)fdt32_to_cpu(cell
[1]),
222 (ulong
)fdt32_to_cpu(cell
[2]));
223 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
224 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
225 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
226 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
229 cell
+= (FDT_PCI_ADDR_CELLS
+
245 debug("(not found)\n");
249 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
251 const char *list
, *end
;
254 list
= fdt_getprop(blob
, node
, "compatible", &len
);
263 if (len
>= strlen("pciVVVV,DDDD")) {
264 s
= strstr(list
, "pci");
267 * check if the string is something like pciVVVV,DDDD.RR
268 * or just pciVVVV,DDDD
270 if (s
&& s
[7] == ',' &&
271 (s
[12] == '.' || s
[12] == 0)) {
273 *vendor
= simple_strtol(s
, NULL
, 16);
276 *device
= simple_strtol(s
, NULL
, 16);
287 int fdtdec_get_pci_bar32(struct udevice
*dev
, struct fdt_pci_addr
*addr
,
292 /* extract the bar number from fdt_pci_addr */
293 barnum
= addr
->phys_hi
& 0xff;
294 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
297 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
298 *bar
= dm_pci_read_bar32(dev
, barnum
);
304 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
305 uint64_t default_val
)
307 const uint64_t *cell64
;
310 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
311 if (!cell64
|| length
< sizeof(*cell64
))
314 return fdt64_to_cpu(*cell64
);
317 int fdtdec_get_is_enabled(const void *blob
, int node
)
322 * It should say "okay", so only allow that. Some fdts use "ok" but
323 * this is a bug. Please fix your device tree source file. See here
326 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
328 cell
= fdt_getprop(blob
, node
, "status", NULL
);
330 return 0 == strcmp(cell
, "okay");
334 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
336 enum fdt_compat_id id
;
338 /* Search our drivers */
339 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
340 if (0 == fdt_node_check_compatible(blob
, node
,
343 return COMPAT_UNKNOWN
;
346 int fdtdec_next_compatible(const void *blob
, int node
,
347 enum fdt_compat_id id
)
349 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
352 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
353 enum fdt_compat_id id
, int *depthp
)
356 node
= fdt_next_node(blob
, node
, depthp
);
357 } while (*depthp
> 1);
359 /* If this is a direct subnode, and compatible, return it */
360 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
361 blob
, node
, compat_names
[id
]))
364 return -FDT_ERR_NOTFOUND
;
367 int fdtdec_next_alias(const void *blob
, const char *name
,
368 enum fdt_compat_id id
, int *upto
)
370 #define MAX_STR_LEN 20
371 char str
[MAX_STR_LEN
+ 20];
374 /* snprintf() is not available */
375 assert(strlen(name
) < MAX_STR_LEN
);
376 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
377 node
= fdt_path_offset(blob
, str
);
380 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
384 return -FDT_ERR_NOTFOUND
;
389 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
390 enum fdt_compat_id id
, int *node_list
, int maxcount
)
392 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
394 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
397 /* TODO: Can we tighten this code up a little? */
398 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
399 enum fdt_compat_id id
, int *node_list
, int maxcount
)
401 int name_len
= strlen(name
);
409 /* find the alias node if present */
410 alias_node
= fdt_path_offset(blob
, "/aliases");
413 * start with nothing, and we can assume that the root node can't
416 memset(nodes
, '\0', sizeof(nodes
));
418 /* First find all the compatible nodes */
419 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
420 node
= fdtdec_next_compatible(blob
, node
, id
);
422 nodes
[count
++] = node
;
425 debug("%s: warning: maxcount exceeded with alias '%s'\n",
428 /* Now find all the aliases */
429 for (offset
= fdt_first_property_offset(blob
, alias_node
);
431 offset
= fdt_next_property_offset(blob
, offset
)) {
432 const struct fdt_property
*prop
;
438 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
439 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
440 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
441 node
= fdt_path_offset(blob
, prop
->data
);
445 /* Get the alias number */
446 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
447 if (number
< 0 || number
>= maxcount
) {
448 debug("%s: warning: alias '%s' is out of range\n",
453 /* Make sure the node we found is actually in our list! */
455 for (j
= 0; j
< count
; j
++)
456 if (nodes
[j
] == node
) {
462 debug("%s: warning: alias '%s' points to a node "
463 "'%s' that is missing or is not compatible "
464 " with '%s'\n", __func__
, path
,
465 fdt_get_name(blob
, node
, NULL
),
471 * Add this node to our list in the right place, and mark
474 if (fdtdec_get_is_enabled(blob
, node
)) {
475 if (node_list
[number
]) {
476 debug("%s: warning: alias '%s' requires that "
477 "a node be placed in the list in a "
478 "position which is already filled by "
479 "node '%s'\n", __func__
, path
,
480 fdt_get_name(blob
, node
, NULL
));
483 node_list
[number
] = node
;
484 if (number
>= num_found
)
485 num_found
= number
+ 1;
490 /* Add any nodes not mentioned by an alias */
491 for (i
= j
= 0; i
< maxcount
; i
++) {
493 for (; j
< maxcount
; j
++)
495 fdtdec_get_is_enabled(blob
, nodes
[j
]))
498 /* Have we run out of nodes to add? */
502 assert(!node_list
[i
]);
503 node_list
[i
] = nodes
[j
++];
512 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
515 int base_len
= strlen(base
);
516 const char *find_name
;
521 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
522 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
524 aliases
= fdt_path_offset(blob
, "/aliases");
525 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
527 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
533 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
534 debug(" - %s, %s\n", name
, prop
);
535 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
536 strncmp(name
, base
, base_len
))
539 slash
= strrchr(prop
, '/');
540 if (strcmp(slash
+ 1, find_name
))
542 val
= trailing_strtol(name
);
545 debug("Found seq %d\n", *seqp
);
550 debug("Not found\n");
554 const char *fdtdec_get_chosen_prop(const void *blob
, const char *name
)
560 chosen_node
= fdt_path_offset(blob
, "/chosen");
561 return fdt_getprop(blob
, chosen_node
, name
, NULL
);
564 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
568 prop
= fdtdec_get_chosen_prop(blob
, name
);
570 return -FDT_ERR_NOTFOUND
;
571 return fdt_path_offset(blob
, prop
);
574 int fdtdec_check_fdt(void)
577 * We must have an FDT, but we cannot panic() yet since the console
578 * is not ready. So for now, just assert(). Boards which need an early
579 * FDT (prior to console ready) will need to make their own
580 * arrangements and do their own checks.
582 assert(!fdtdec_prepare_fdt());
587 * This function is a little odd in that it accesses global data. At some
588 * point if the architecture board.c files merge this will make more sense.
589 * Even now, it is common code.
591 int fdtdec_prepare_fdt(void)
593 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
594 fdt_check_header(gd
->fdt_blob
)) {
595 #ifdef CONFIG_SPL_BUILD
596 puts("Missing DTB\n");
598 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");
601 printf("fdt_blob=%p\n", gd
->fdt_blob
);
602 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
612 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
617 debug("%s: %s\n", __func__
, prop_name
);
618 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
620 return -FDT_ERR_NOTFOUND
;
622 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
627 * Look up a property in a node and check that it has a minimum length.
629 * @param blob FDT blob
630 * @param node node to examine
631 * @param prop_name name of property to find
632 * @param min_len minimum property length in bytes
633 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
634 found, or -FDT_ERR_BADLAYOUT if not enough data
635 * @return pointer to cell, which is only valid if err == 0
637 static const void *get_prop_check_min_len(const void *blob
, int node
,
638 const char *prop_name
, int min_len
, int *err
)
643 debug("%s: %s\n", __func__
, prop_name
);
644 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
646 *err
= -FDT_ERR_NOTFOUND
;
647 else if (len
< min_len
)
648 *err
= -FDT_ERR_BADLAYOUT
;
654 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
655 u32
*array
, int count
)
660 debug("%s: %s\n", __func__
, prop_name
);
661 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
662 sizeof(u32
) * count
, &err
);
664 for (i
= 0; i
< count
; i
++)
665 array
[i
] = fdt32_to_cpu(cell
[i
]);
670 int fdtdec_get_int_array_count(const void *blob
, int node
,
671 const char *prop_name
, u32
*array
, int count
)
677 debug("%s: %s\n", __func__
, prop_name
);
678 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
680 return -FDT_ERR_NOTFOUND
;
681 elems
= len
/ sizeof(u32
);
684 for (i
= 0; i
< count
; i
++)
685 array
[i
] = fdt32_to_cpu(cell
[i
]);
690 const u32
*fdtdec_locate_array(const void *blob
, int node
,
691 const char *prop_name
, int count
)
696 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
697 sizeof(u32
) * count
, &err
);
698 return err
? NULL
: cell
;
701 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
706 debug("%s: %s\n", __func__
, prop_name
);
707 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
711 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
712 const char *list_name
,
713 const char *cells_name
,
714 int cell_count
, int index
,
715 struct fdtdec_phandle_args
*out_args
)
717 const __be32
*list
, *list_end
;
718 int rc
= 0, size
, cur_index
= 0;
723 /* Retrieve the phandle list property */
724 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
727 list_end
= list
+ size
/ sizeof(*list
);
729 /* Loop over the phandles until all the requested entry is found */
730 while (list
< list_end
) {
735 * If phandle is 0, then it is an empty entry with no
736 * arguments. Skip forward to the next entry.
738 phandle
= be32_to_cpup(list
++);
741 * Find the provider node and parse the #*-cells
742 * property to determine the argument length.
744 * This is not needed if the cell count is hard-coded
745 * (i.e. cells_name not set, but cell_count is set),
746 * except when we're going to return the found node
749 if (cells_name
|| cur_index
== index
) {
750 node
= fdt_node_offset_by_phandle(blob
,
753 debug("%s: could not find phandle\n",
754 fdt_get_name(blob
, src_node
,
761 count
= fdtdec_get_int(blob
, node
, cells_name
,
764 debug("%s: could not get %s for %s\n",
765 fdt_get_name(blob
, src_node
,
768 fdt_get_name(blob
, node
,
777 * Make sure that the arguments actually fit in the
778 * remaining property data length
780 if (list
+ count
> list_end
) {
781 debug("%s: arguments longer than property\n",
782 fdt_get_name(blob
, src_node
, NULL
));
788 * All of the error cases above bail out of the loop, so at
789 * this point, the parsing is successful. If the requested
790 * index matches, then fill the out_args structure and return,
791 * or return -ENOENT for an empty entry.
794 if (cur_index
== index
) {
801 if (count
> MAX_PHANDLE_ARGS
) {
802 debug("%s: too many arguments %d\n",
803 fdt_get_name(blob
, src_node
,
805 count
= MAX_PHANDLE_ARGS
;
807 out_args
->node
= node
;
808 out_args
->args_count
= count
;
809 for (i
= 0; i
< count
; i
++) {
811 be32_to_cpup(list
++);
815 /* Found it! return success */
825 * Result will be one of:
826 * -ENOENT : index is for empty phandle
827 * -EINVAL : parsing error on data
828 * [1..n] : Number of phandle (count mode; when index = -1)
830 rc
= index
< 0 ? cur_index
: -ENOENT
;
835 int fdtdec_get_child_count(const void *blob
, int node
)
840 fdt_for_each_subnode(blob
, subnode
, node
)
846 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
847 u8
*array
, int count
)
852 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
854 memcpy(array
, cell
, count
);
858 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
859 const char *prop_name
, int count
)
864 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
870 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
875 debug("%s: %s\n", __func__
, prop_name
);
876 config_node
= fdt_path_offset(blob
, "/config");
879 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
882 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
887 debug("%s: %s\n", __func__
, prop_name
);
888 config_node
= fdt_path_offset(blob
, "/config");
891 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
896 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
902 debug("%s: %s\n", __func__
, prop_name
);
903 nodeoffset
= fdt_path_offset(blob
, "/config");
907 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
911 return (char *)nodep
;
914 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
915 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
917 const fdt_addr_t
*cell
;
920 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
922 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
923 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
924 debug("cell=%p, len=%d\n", cell
, len
);
928 *basep
= fdt_addr_to_cpu(*cell
);
929 *sizep
= fdt_size_to_cpu(cell
[1]);
930 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
937 * Read a flash entry from the fdt
939 * @param blob FDT blob
940 * @param node Offset of node to read
941 * @param name Name of node being read
942 * @param entry Place to put offset and size of this node
943 * @return 0 if ok, -ve on error
945 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
946 struct fmap_entry
*entry
)
951 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
952 debug("Node '%s' has bad/missing 'reg' property\n", name
);
953 return -FDT_ERR_NOTFOUND
;
955 entry
->offset
= reg
[0];
956 entry
->length
= reg
[1];
957 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
958 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
959 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
960 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
961 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
962 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
963 entry
->hash
= (uint8_t *)prop
;
968 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
973 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
978 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
979 unsigned int index
, struct fdt_resource
*res
)
981 const fdt32_t
*ptr
, *end
;
982 int na
, ns
, len
, parent
;
985 parent
= fdt_parent_offset(fdt
, node
);
989 na
= fdt_address_cells(fdt
, parent
);
990 ns
= fdt_size_cells(fdt
, parent
);
992 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
996 end
= ptr
+ len
/ sizeof(*ptr
);
998 while (ptr
+ na
+ ns
<= end
) {
1000 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
1001 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
1009 return -FDT_ERR_NOTFOUND
;
1012 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
1013 const char *prop_names
, const char *name
,
1014 struct fdt_resource
*res
)
1018 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
1022 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1025 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1026 const char *mem_type
, const char *suffix
,
1027 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1031 fdt_size_t size
, offset_size
;
1032 fdt_addr_t base
, offset
;
1035 if (config_node
== -1) {
1036 config_node
= fdt_path_offset(blob
, "/config");
1037 if (config_node
< 0) {
1038 debug("%s: Cannot find /config node\n", __func__
);
1045 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1047 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1049 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1054 node
= fdt_path_offset(blob
, mem
);
1056 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1057 fdt_strerror(node
));
1062 * Not strictly correct - the memory may have multiple banks. We just
1065 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1066 debug("%s: Failed to decode memory region %s\n", __func__
,
1071 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1073 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1075 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1080 *basep
= base
+ offset
;
1081 *sizep
= offset_size
;
1086 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1087 struct timing_entry
*result
)
1089 int length
, ret
= 0;
1092 prop
= fdt_getprop(blob
, node
, name
, &length
);
1094 debug("%s: could not find property %s\n",
1095 fdt_get_name(blob
, node
, NULL
), name
);
1099 if (length
== sizeof(u32
)) {
1100 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1101 result
->min
= result
->typ
;
1102 result
->max
= result
->typ
;
1104 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1110 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1111 struct display_timing
*dt
)
1113 int i
, node
, timings_node
;
1117 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1118 if (timings_node
< 0)
1119 return timings_node
;
1121 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1122 node
> 0 && i
!= index
;
1123 node
= fdt_next_subnode(blob
, node
))
1129 memset(dt
, 0, sizeof(*dt
));
1131 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1133 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1135 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1136 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1137 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1139 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1141 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1142 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1143 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1147 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1149 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1150 DISPLAY_FLAGS_VSYNC_LOW
;
1152 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1154 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1155 DISPLAY_FLAGS_HSYNC_LOW
;
1157 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1159 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1160 DISPLAY_FLAGS_DE_LOW
;
1162 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1164 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1165 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1168 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1169 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1170 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1171 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1172 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1173 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1178 int fdtdec_setup(void)
1180 #if CONFIG_IS_ENABLED(OF_CONTROL)
1181 # ifdef CONFIG_OF_EMBED
1182 /* Get a pointer to the FDT */
1183 gd
->fdt_blob
= __dtb_dt_begin
;
1184 # elif defined CONFIG_OF_SEPARATE
1185 # ifdef CONFIG_SPL_BUILD
1186 /* FDT is at end of BSS unless it is in a different memory region */
1187 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS
))
1188 gd
->fdt_blob
= (ulong
*)&_image_binary_end
;
1190 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1192 /* FDT is at end of image */
1193 gd
->fdt_blob
= (ulong
*)&_end
;
1195 # elif defined(CONFIG_OF_HOSTFILE)
1196 if (sandbox_read_fdt_from_file()) {
1197 puts("Failed to read control FDT\n");
1201 # ifndef CONFIG_SPL_BUILD
1202 /* Allow the early environment to override the fdt address */
1203 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1204 (uintptr_t)gd
->fdt_blob
);
1207 return fdtdec_prepare_fdt();
1210 #endif /* !USE_HOSTCC */