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(ALTERA_SOCFPGA_DWMAC
, "altr,socfpga-stmmac"),
63 COMPAT(ALTERA_SOCFPGA_DWMMC
, "altr,socfpga-dw-mshc"),
64 COMPAT(ALTERA_SOCFPGA_DWC2USB
, "snps,dwc2"),
65 COMPAT(INTEL_BAYTRAIL_FSP
, "intel,baytrail-fsp"),
66 COMPAT(INTEL_BAYTRAIL_FSP_MDP
, "intel,baytrail-fsp-mdp"),
67 COMPAT(INTEL_IVYBRIDGE_FSP
, "intel,ivybridge-fsp"),
68 COMPAT(COMPAT_SUNXI_NAND
, "allwinner,sun4i-a10-nand"),
71 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
73 /* We allow reading of the 'unknown' ID for testing purposes */
74 assert(id
>= 0 && id
< COMPAT_COUNT
);
75 return compat_names
[id
];
78 fdt_addr_t
fdtdec_get_addr_size_fixed(const void *blob
, int node
,
79 const char *prop_name
, int index
, int na
, int ns
,
80 fdt_size_t
*sizep
, bool translate
)
82 const fdt32_t
*prop
, *prop_end
;
83 const fdt32_t
*prop_addr
, *prop_size
, *prop_after_size
;
87 debug("%s: %s: ", __func__
, prop_name
);
89 if (na
> (sizeof(fdt_addr_t
) / sizeof(fdt32_t
))) {
90 debug("(na too large for fdt_addr_t type)\n");
91 return FDT_ADDR_T_NONE
;
94 if (ns
> (sizeof(fdt_size_t
) / sizeof(fdt32_t
))) {
95 debug("(ns too large for fdt_size_t type)\n");
96 return FDT_ADDR_T_NONE
;
99 prop
= fdt_getprop(blob
, node
, prop_name
, &len
);
101 debug("(not found)\n");
102 return FDT_ADDR_T_NONE
;
104 prop_end
= prop
+ (len
/ sizeof(*prop
));
106 prop_addr
= prop
+ (index
* (na
+ ns
));
107 prop_size
= prop_addr
+ na
;
108 prop_after_size
= prop_size
+ ns
;
109 if (prop_after_size
> prop_end
) {
110 debug("(not enough data: expected >= %d cells, got %d cells)\n",
111 (u32
)(prop_after_size
- prop
), ((u32
)(prop_end
- prop
)));
112 return FDT_ADDR_T_NONE
;
115 #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_OF_LIBFDT)
117 addr
= fdt_translate_address(blob
, node
, prop_addr
);
120 addr
= fdtdec_get_number(prop_addr
, na
);
123 *sizep
= fdtdec_get_number(prop_size
, ns
);
124 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr
,
125 (unsigned long long)*sizep
);
127 debug("addr=%08llx\n", (unsigned long long)addr
);
133 fdt_addr_t
fdtdec_get_addr_size_auto_parent(const void *blob
, int parent
,
134 int node
, const char *prop_name
, int index
, fdt_size_t
*sizep
,
139 debug("%s: ", __func__
);
141 na
= fdt_address_cells(blob
, parent
);
143 debug("(bad #address-cells)\n");
144 return FDT_ADDR_T_NONE
;
147 ns
= fdt_size_cells(blob
, parent
);
149 debug("(bad #size-cells)\n");
150 return FDT_ADDR_T_NONE
;
153 debug("na=%d, ns=%d, ", na
, ns
);
155 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, index
, na
,
156 ns
, sizep
, translate
);
159 fdt_addr_t
fdtdec_get_addr_size_auto_noparent(const void *blob
, int node
,
160 const char *prop_name
, int index
, fdt_size_t
*sizep
,
165 debug("%s: ", __func__
);
167 parent
= fdt_parent_offset(blob
, node
);
169 debug("(no parent found)\n");
170 return FDT_ADDR_T_NONE
;
173 return fdtdec_get_addr_size_auto_parent(blob
, parent
, node
, prop_name
,
174 index
, sizep
, translate
);
177 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
178 const char *prop_name
, fdt_size_t
*sizep
)
180 int ns
= sizep
? (sizeof(fdt_size_t
) / sizeof(fdt32_t
)) : 0;
182 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, 0,
183 sizeof(fdt_addr_t
) / sizeof(fdt32_t
),
187 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
188 const char *prop_name
)
190 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
193 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
194 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
195 const char *prop_name
, struct fdt_pci_addr
*addr
)
201 debug("%s: %s: ", __func__
, prop_name
);
204 * If we follow the pci bus bindings strictly, we should check
205 * the value of the node's parent node's #address-cells and
206 * #size-cells. They need to be 3 and 2 accordingly. However,
207 * for simplicity we skip the check here.
209 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
213 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
214 int num
= len
/ FDT_PCI_REG_SIZE
;
217 for (i
= 0; i
< num
; i
++) {
218 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
219 (ulong
)fdt32_to_cpu(cell
[0]),
220 (ulong
)fdt32_to_cpu(cell
[1]),
221 (ulong
)fdt32_to_cpu(cell
[2]));
222 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
223 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
224 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
225 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
228 cell
+= (FDT_PCI_ADDR_CELLS
+
244 debug("(not found)\n");
248 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
250 const char *list
, *end
;
253 list
= fdt_getprop(blob
, node
, "compatible", &len
);
262 if (len
>= strlen("pciVVVV,DDDD")) {
263 s
= strstr(list
, "pci");
266 * check if the string is something like pciVVVV,DDDD.RR
267 * or just pciVVVV,DDDD
269 if (s
&& s
[7] == ',' &&
270 (s
[12] == '.' || s
[12] == 0)) {
272 *vendor
= simple_strtol(s
, NULL
, 16);
275 *device
= simple_strtol(s
, NULL
, 16);
286 int fdtdec_get_pci_bar32(struct udevice
*dev
, struct fdt_pci_addr
*addr
,
291 /* extract the bar number from fdt_pci_addr */
292 barnum
= addr
->phys_hi
& 0xff;
293 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
296 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
297 *bar
= dm_pci_read_bar32(dev
, barnum
);
303 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
304 uint64_t default_val
)
306 const uint64_t *cell64
;
309 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
310 if (!cell64
|| length
< sizeof(*cell64
))
313 return fdt64_to_cpu(*cell64
);
316 int fdtdec_get_is_enabled(const void *blob
, int node
)
321 * It should say "okay", so only allow that. Some fdts use "ok" but
322 * this is a bug. Please fix your device tree source file. See here
325 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
327 cell
= fdt_getprop(blob
, node
, "status", NULL
);
329 return 0 == strcmp(cell
, "okay");
333 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
335 enum fdt_compat_id id
;
337 /* Search our drivers */
338 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
339 if (0 == fdt_node_check_compatible(blob
, node
,
342 return COMPAT_UNKNOWN
;
345 int fdtdec_next_compatible(const void *blob
, int node
,
346 enum fdt_compat_id id
)
348 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
351 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
352 enum fdt_compat_id id
, int *depthp
)
355 node
= fdt_next_node(blob
, node
, depthp
);
356 } while (*depthp
> 1);
358 /* If this is a direct subnode, and compatible, return it */
359 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
360 blob
, node
, compat_names
[id
]))
363 return -FDT_ERR_NOTFOUND
;
366 int fdtdec_next_alias(const void *blob
, const char *name
,
367 enum fdt_compat_id id
, int *upto
)
369 #define MAX_STR_LEN 20
370 char str
[MAX_STR_LEN
+ 20];
373 /* snprintf() is not available */
374 assert(strlen(name
) < MAX_STR_LEN
);
375 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
376 node
= fdt_path_offset(blob
, str
);
379 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
383 return -FDT_ERR_NOTFOUND
;
388 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
389 enum fdt_compat_id id
, int *node_list
, int maxcount
)
391 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
393 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
396 /* TODO: Can we tighten this code up a little? */
397 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
398 enum fdt_compat_id id
, int *node_list
, int maxcount
)
400 int name_len
= strlen(name
);
408 /* find the alias node if present */
409 alias_node
= fdt_path_offset(blob
, "/aliases");
412 * start with nothing, and we can assume that the root node can't
415 memset(nodes
, '\0', sizeof(nodes
));
417 /* First find all the compatible nodes */
418 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
419 node
= fdtdec_next_compatible(blob
, node
, id
);
421 nodes
[count
++] = node
;
424 debug("%s: warning: maxcount exceeded with alias '%s'\n",
427 /* Now find all the aliases */
428 for (offset
= fdt_first_property_offset(blob
, alias_node
);
430 offset
= fdt_next_property_offset(blob
, offset
)) {
431 const struct fdt_property
*prop
;
437 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
438 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
439 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
440 node
= fdt_path_offset(blob
, prop
->data
);
444 /* Get the alias number */
445 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
446 if (number
< 0 || number
>= maxcount
) {
447 debug("%s: warning: alias '%s' is out of range\n",
452 /* Make sure the node we found is actually in our list! */
454 for (j
= 0; j
< count
; j
++)
455 if (nodes
[j
] == node
) {
461 debug("%s: warning: alias '%s' points to a node "
462 "'%s' that is missing or is not compatible "
463 " with '%s'\n", __func__
, path
,
464 fdt_get_name(blob
, node
, NULL
),
470 * Add this node to our list in the right place, and mark
473 if (fdtdec_get_is_enabled(blob
, node
)) {
474 if (node_list
[number
]) {
475 debug("%s: warning: alias '%s' requires that "
476 "a node be placed in the list in a "
477 "position which is already filled by "
478 "node '%s'\n", __func__
, path
,
479 fdt_get_name(blob
, node
, NULL
));
482 node_list
[number
] = node
;
483 if (number
>= num_found
)
484 num_found
= number
+ 1;
489 /* Add any nodes not mentioned by an alias */
490 for (i
= j
= 0; i
< maxcount
; i
++) {
492 for (; j
< maxcount
; j
++)
494 fdtdec_get_is_enabled(blob
, nodes
[j
]))
497 /* Have we run out of nodes to add? */
501 assert(!node_list
[i
]);
502 node_list
[i
] = nodes
[j
++];
511 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
514 int base_len
= strlen(base
);
515 const char *find_name
;
520 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
521 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
523 aliases
= fdt_path_offset(blob
, "/aliases");
524 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
526 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
532 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
533 debug(" - %s, %s\n", name
, prop
);
534 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
535 strncmp(name
, base
, base_len
))
538 slash
= strrchr(prop
, '/');
539 if (strcmp(slash
+ 1, find_name
))
541 val
= trailing_strtol(name
);
544 debug("Found seq %d\n", *seqp
);
549 debug("Not found\n");
553 const char *fdtdec_get_chosen_prop(const void *blob
, const char *name
)
559 chosen_node
= fdt_path_offset(blob
, "/chosen");
560 return fdt_getprop(blob
, chosen_node
, name
, NULL
);
563 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
567 prop
= fdtdec_get_chosen_prop(blob
, name
);
569 return -FDT_ERR_NOTFOUND
;
570 return fdt_path_offset(blob
, prop
);
573 int fdtdec_check_fdt(void)
576 * We must have an FDT, but we cannot panic() yet since the console
577 * is not ready. So for now, just assert(). Boards which need an early
578 * FDT (prior to console ready) will need to make their own
579 * arrangements and do their own checks.
581 assert(!fdtdec_prepare_fdt());
586 * This function is a little odd in that it accesses global data. At some
587 * point if the architecture board.c files merge this will make more sense.
588 * Even now, it is common code.
590 int fdtdec_prepare_fdt(void)
592 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
593 fdt_check_header(gd
->fdt_blob
)) {
594 #ifdef CONFIG_SPL_BUILD
595 puts("Missing DTB\n");
597 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");
600 printf("fdt_blob=%p\n", gd
->fdt_blob
);
601 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
611 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
616 debug("%s: %s\n", __func__
, prop_name
);
617 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
619 return -FDT_ERR_NOTFOUND
;
621 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
626 * Look up a property in a node and check that it has a minimum length.
628 * @param blob FDT blob
629 * @param node node to examine
630 * @param prop_name name of property to find
631 * @param min_len minimum property length in bytes
632 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
633 found, or -FDT_ERR_BADLAYOUT if not enough data
634 * @return pointer to cell, which is only valid if err == 0
636 static const void *get_prop_check_min_len(const void *blob
, int node
,
637 const char *prop_name
, int min_len
, int *err
)
642 debug("%s: %s\n", __func__
, prop_name
);
643 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
645 *err
= -FDT_ERR_NOTFOUND
;
646 else if (len
< min_len
)
647 *err
= -FDT_ERR_BADLAYOUT
;
653 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
654 u32
*array
, int count
)
659 debug("%s: %s\n", __func__
, prop_name
);
660 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
661 sizeof(u32
) * count
, &err
);
663 for (i
= 0; i
< count
; i
++)
664 array
[i
] = fdt32_to_cpu(cell
[i
]);
669 int fdtdec_get_int_array_count(const void *blob
, int node
,
670 const char *prop_name
, u32
*array
, int count
)
676 debug("%s: %s\n", __func__
, prop_name
);
677 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
679 return -FDT_ERR_NOTFOUND
;
680 elems
= len
/ sizeof(u32
);
683 for (i
= 0; i
< count
; i
++)
684 array
[i
] = fdt32_to_cpu(cell
[i
]);
689 const u32
*fdtdec_locate_array(const void *blob
, int node
,
690 const char *prop_name
, int count
)
695 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
696 sizeof(u32
) * count
, &err
);
697 return err
? NULL
: cell
;
700 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
705 debug("%s: %s\n", __func__
, prop_name
);
706 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
710 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
711 const char *list_name
,
712 const char *cells_name
,
713 int cell_count
, int index
,
714 struct fdtdec_phandle_args
*out_args
)
716 const __be32
*list
, *list_end
;
717 int rc
= 0, size
, cur_index
= 0;
722 /* Retrieve the phandle list property */
723 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
726 list_end
= list
+ size
/ sizeof(*list
);
728 /* Loop over the phandles until all the requested entry is found */
729 while (list
< list_end
) {
734 * If phandle is 0, then it is an empty entry with no
735 * arguments. Skip forward to the next entry.
737 phandle
= be32_to_cpup(list
++);
740 * Find the provider node and parse the #*-cells
741 * property to determine the argument length.
743 * This is not needed if the cell count is hard-coded
744 * (i.e. cells_name not set, but cell_count is set),
745 * except when we're going to return the found node
748 if (cells_name
|| cur_index
== index
) {
749 node
= fdt_node_offset_by_phandle(blob
,
752 debug("%s: could not find phandle\n",
753 fdt_get_name(blob
, src_node
,
760 count
= fdtdec_get_int(blob
, node
, cells_name
,
763 debug("%s: could not get %s for %s\n",
764 fdt_get_name(blob
, src_node
,
767 fdt_get_name(blob
, node
,
776 * Make sure that the arguments actually fit in the
777 * remaining property data length
779 if (list
+ count
> list_end
) {
780 debug("%s: arguments longer than property\n",
781 fdt_get_name(blob
, src_node
, NULL
));
787 * All of the error cases above bail out of the loop, so at
788 * this point, the parsing is successful. If the requested
789 * index matches, then fill the out_args structure and return,
790 * or return -ENOENT for an empty entry.
793 if (cur_index
== index
) {
800 if (count
> MAX_PHANDLE_ARGS
) {
801 debug("%s: too many arguments %d\n",
802 fdt_get_name(blob
, src_node
,
804 count
= MAX_PHANDLE_ARGS
;
806 out_args
->node
= node
;
807 out_args
->args_count
= count
;
808 for (i
= 0; i
< count
; i
++) {
810 be32_to_cpup(list
++);
814 /* Found it! return success */
824 * Result will be one of:
825 * -ENOENT : index is for empty phandle
826 * -EINVAL : parsing error on data
827 * [1..n] : Number of phandle (count mode; when index = -1)
829 rc
= index
< 0 ? cur_index
: -ENOENT
;
834 int fdtdec_get_child_count(const void *blob
, int node
)
839 fdt_for_each_subnode(subnode
, blob
, node
)
845 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
846 u8
*array
, int count
)
851 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
853 memcpy(array
, cell
, count
);
857 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
858 const char *prop_name
, int count
)
863 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
869 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
874 debug("%s: %s\n", __func__
, prop_name
);
875 config_node
= fdt_path_offset(blob
, "/config");
878 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
881 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
886 debug("%s: %s\n", __func__
, prop_name
);
887 config_node
= fdt_path_offset(blob
, "/config");
890 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
895 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
901 debug("%s: %s\n", __func__
, prop_name
);
902 nodeoffset
= fdt_path_offset(blob
, "/config");
906 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
910 return (char *)nodep
;
913 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
914 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
916 const fdt_addr_t
*cell
;
919 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
921 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
922 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
923 debug("cell=%p, len=%d\n", cell
, len
);
927 *basep
= fdt_addr_to_cpu(*cell
);
928 *sizep
= fdt_size_to_cpu(cell
[1]);
929 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
936 * Read a flash entry from the fdt
938 * @param blob FDT blob
939 * @param node Offset of node to read
940 * @param name Name of node being read
941 * @param entry Place to put offset and size of this node
942 * @return 0 if ok, -ve on error
944 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
945 struct fmap_entry
*entry
)
950 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
951 debug("Node '%s' has bad/missing 'reg' property\n", name
);
952 return -FDT_ERR_NOTFOUND
;
954 entry
->offset
= reg
[0];
955 entry
->length
= reg
[1];
956 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
957 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
958 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
959 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
960 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
961 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
962 entry
->hash
= (uint8_t *)prop
;
967 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
972 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
977 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
978 unsigned int index
, struct fdt_resource
*res
)
980 const fdt32_t
*ptr
, *end
;
981 int na
, ns
, len
, parent
;
984 parent
= fdt_parent_offset(fdt
, node
);
988 na
= fdt_address_cells(fdt
, parent
);
989 ns
= fdt_size_cells(fdt
, parent
);
991 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
995 end
= ptr
+ len
/ sizeof(*ptr
);
997 while (ptr
+ na
+ ns
<= end
) {
999 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
1000 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
1008 return -FDT_ERR_NOTFOUND
;
1011 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
1012 const char *prop_names
, const char *name
,
1013 struct fdt_resource
*res
)
1017 index
= fdt_stringlist_search(fdt
, node
, prop_names
, name
);
1021 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1024 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1025 const char *mem_type
, const char *suffix
,
1026 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1030 fdt_size_t size
, offset_size
;
1031 fdt_addr_t base
, offset
;
1034 if (config_node
== -1) {
1035 config_node
= fdt_path_offset(blob
, "/config");
1036 if (config_node
< 0) {
1037 debug("%s: Cannot find /config node\n", __func__
);
1044 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1046 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1048 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1053 node
= fdt_path_offset(blob
, mem
);
1055 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1056 fdt_strerror(node
));
1061 * Not strictly correct - the memory may have multiple banks. We just
1064 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1065 debug("%s: Failed to decode memory region %s\n", __func__
,
1070 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1072 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1074 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1079 *basep
= base
+ offset
;
1080 *sizep
= offset_size
;
1085 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1086 struct timing_entry
*result
)
1088 int length
, ret
= 0;
1091 prop
= fdt_getprop(blob
, node
, name
, &length
);
1093 debug("%s: could not find property %s\n",
1094 fdt_get_name(blob
, node
, NULL
), name
);
1098 if (length
== sizeof(u32
)) {
1099 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1100 result
->min
= result
->typ
;
1101 result
->max
= result
->typ
;
1103 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1109 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1110 struct display_timing
*dt
)
1112 int i
, node
, timings_node
;
1116 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1117 if (timings_node
< 0)
1118 return timings_node
;
1120 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1121 node
> 0 && i
!= index
;
1122 node
= fdt_next_subnode(blob
, node
))
1128 memset(dt
, 0, sizeof(*dt
));
1130 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1132 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1134 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1135 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1136 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1138 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1140 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1141 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1142 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1146 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1148 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1149 DISPLAY_FLAGS_VSYNC_LOW
;
1151 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1153 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1154 DISPLAY_FLAGS_HSYNC_LOW
;
1156 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1158 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1159 DISPLAY_FLAGS_DE_LOW
;
1161 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1163 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1164 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1167 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1168 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1169 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1170 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1171 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1172 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1177 int fdtdec_setup(void)
1179 #if CONFIG_IS_ENABLED(OF_CONTROL)
1180 # ifdef CONFIG_OF_EMBED
1181 /* Get a pointer to the FDT */
1182 gd
->fdt_blob
= __dtb_dt_begin
;
1183 # elif defined CONFIG_OF_SEPARATE
1184 # ifdef CONFIG_SPL_BUILD
1185 /* FDT is at end of BSS unless it is in a different memory region */
1186 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS
))
1187 gd
->fdt_blob
= (ulong
*)&_image_binary_end
;
1189 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1191 /* FDT is at end of image */
1192 gd
->fdt_blob
= (ulong
*)&_end
;
1194 # elif defined(CONFIG_OF_HOSTFILE)
1195 if (sandbox_read_fdt_from_file()) {
1196 puts("Failed to read control FDT\n");
1200 # ifndef CONFIG_SPL_BUILD
1201 /* Allow the early environment to override the fdt address */
1202 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1203 (uintptr_t)gd
->fdt_blob
);
1206 return fdtdec_prepare_fdt();
1209 #endif /* !USE_HOSTCC */