2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/sections.h>
14 #include <linux/ctype.h>
16 DECLARE_GLOBAL_DATA_PTR
;
19 * Here are the type we know about. One day we might allow drivers to
20 * register. For now we just put them here. The COMPAT macro allows us to
21 * turn this into a sparse list later, and keeps the ID with the name.
23 * NOTE: This list is basically a TODO list for things that need to be
24 * converted to driver model. So don't add new things here unless there is a
25 * good reason why driver-model conversion is infeasible. Examples include
26 * things which are used before driver model is available.
28 #define COMPAT(id, name) name
29 static const char * const compat_names
[COMPAT_COUNT
] = {
30 COMPAT(UNKNOWN
, "<none>"),
31 COMPAT(NVIDIA_TEGRA20_EMC
, "nvidia,tegra20-emc"),
32 COMPAT(NVIDIA_TEGRA20_EMC_TABLE
, "nvidia,tegra20-emc-table"),
33 COMPAT(NVIDIA_TEGRA20_NAND
, "nvidia,tegra20-nand"),
34 COMPAT(NVIDIA_TEGRA124_PMC
, "nvidia,tegra124-pmc"),
35 COMPAT(NVIDIA_TEGRA186_SDMMC
, "nvidia,tegra186-sdhci"),
36 COMPAT(NVIDIA_TEGRA210_SDMMC
, "nvidia,tegra210-sdhci"),
37 COMPAT(NVIDIA_TEGRA124_SDMMC
, "nvidia,tegra124-sdhci"),
38 COMPAT(NVIDIA_TEGRA30_SDMMC
, "nvidia,tegra30-sdhci"),
39 COMPAT(NVIDIA_TEGRA20_SDMMC
, "nvidia,tegra20-sdhci"),
40 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL
, "nvidia,tegra124-xusb-padctl"),
41 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL
, "nvidia,tegra210-xusb-padctl"),
42 COMPAT(SMSC_LAN9215
, "smsc,lan9215"),
43 COMPAT(SAMSUNG_EXYNOS5_SROMC
, "samsung,exynos-sromc"),
44 COMPAT(SAMSUNG_S3C2440_I2C
, "samsung,s3c2440-i2c"),
45 COMPAT(SAMSUNG_EXYNOS5_SOUND
, "samsung,exynos-sound"),
46 COMPAT(WOLFSON_WM8994_CODEC
, "wolfson,wm8994-codec"),
47 COMPAT(SAMSUNG_EXYNOS_USB_PHY
, "samsung,exynos-usb-phy"),
48 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY
, "samsung,exynos5250-usb3-phy"),
49 COMPAT(SAMSUNG_EXYNOS_TMU
, "samsung,exynos-tmu"),
50 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI
, "samsung,exynos-mipi-dsi"),
51 COMPAT(SAMSUNG_EXYNOS_DWMMC
, "samsung,exynos-dwmmc"),
52 COMPAT(SAMSUNG_EXYNOS_MMC
, "samsung,exynos-mmc"),
53 COMPAT(MAXIM_MAX77686_PMIC
, "maxim,max77686"),
54 COMPAT(GENERIC_SPI_FLASH
, "spi-flash"),
55 COMPAT(MAXIM_98095_CODEC
, "maxim,max98095-codec"),
56 COMPAT(SAMSUNG_EXYNOS5_I2C
, "samsung,exynos5-hsi2c"),
57 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
58 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
59 COMPAT(AMS_AS3722
, "ams,as3722"),
60 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
61 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
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"),
70 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
72 /* We allow reading of the 'unknown' ID for testing purposes */
73 assert(id
>= 0 && id
< COMPAT_COUNT
);
74 return compat_names
[id
];
77 fdt_addr_t
fdtdec_get_addr_size_fixed(const void *blob
, int node
,
78 const char *prop_name
, int index
, int na
, int ns
,
81 const fdt32_t
*prop
, *prop_end
;
82 const fdt32_t
*prop_addr
, *prop_size
, *prop_after_size
;
86 debug("%s: %s: ", __func__
, prop_name
);
88 if (na
> (sizeof(fdt_addr_t
) / sizeof(fdt32_t
))) {
89 debug("(na too large for fdt_addr_t type)\n");
90 return FDT_ADDR_T_NONE
;
93 if (ns
> (sizeof(fdt_size_t
) / sizeof(fdt32_t
))) {
94 debug("(ns too large for fdt_size_t type)\n");
95 return FDT_ADDR_T_NONE
;
98 prop
= fdt_getprop(blob
, node
, prop_name
, &len
);
100 debug("(not found)\n");
101 return FDT_ADDR_T_NONE
;
103 prop_end
= prop
+ (len
/ sizeof(*prop
));
105 prop_addr
= prop
+ (index
* (na
+ ns
));
106 prop_size
= prop_addr
+ na
;
107 prop_after_size
= prop_size
+ ns
;
108 if (prop_after_size
> prop_end
) {
109 debug("(not enough data: expected >= %d cells, got %d cells)\n",
110 (u32
)(prop_after_size
- prop
), ((u32
)(prop_end
- prop
)));
111 return FDT_ADDR_T_NONE
;
114 addr
= fdtdec_get_number(prop_addr
, na
);
117 *sizep
= fdtdec_get_number(prop_size
, ns
);
118 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr
,
119 (unsigned long long)*sizep
);
121 debug("addr=%08llx\n", (unsigned long long)addr
);
127 fdt_addr_t
fdtdec_get_addr_size_auto_parent(const void *blob
, int parent
,
128 int node
, const char *prop_name
, int index
, fdt_size_t
*sizep
)
132 debug("%s: ", __func__
);
134 na
= fdt_address_cells(blob
, parent
);
136 debug("(bad #address-cells)\n");
137 return FDT_ADDR_T_NONE
;
140 ns
= fdt_size_cells(blob
, parent
);
142 debug("(bad #size-cells)\n");
143 return FDT_ADDR_T_NONE
;
146 debug("na=%d, ns=%d, ", na
, ns
);
148 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, index
, na
,
152 fdt_addr_t
fdtdec_get_addr_size_auto_noparent(const void *blob
, int node
,
153 const char *prop_name
, int index
, fdt_size_t
*sizep
)
157 debug("%s: ", __func__
);
159 parent
= fdt_parent_offset(blob
, node
);
161 debug("(no parent found)\n");
162 return FDT_ADDR_T_NONE
;
165 return fdtdec_get_addr_size_auto_parent(blob
, parent
, node
, prop_name
,
169 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
170 const char *prop_name
, fdt_size_t
*sizep
)
172 int ns
= sizep
? (sizeof(fdt_size_t
) / sizeof(fdt32_t
)) : 0;
174 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, 0,
175 sizeof(fdt_addr_t
) / sizeof(fdt32_t
),
179 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
180 const char *prop_name
)
182 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
185 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
186 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
187 const char *prop_name
, struct fdt_pci_addr
*addr
)
193 debug("%s: %s: ", __func__
, prop_name
);
196 * If we follow the pci bus bindings strictly, we should check
197 * the value of the node's parent node's #address-cells and
198 * #size-cells. They need to be 3 and 2 accordingly. However,
199 * for simplicity we skip the check here.
201 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
205 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
206 int num
= len
/ FDT_PCI_REG_SIZE
;
209 for (i
= 0; i
< num
; i
++) {
210 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
211 (ulong
)fdt32_to_cpu(cell
[0]),
212 (ulong
)fdt32_to_cpu(cell
[1]),
213 (ulong
)fdt32_to_cpu(cell
[2]));
214 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
215 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
216 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
217 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
220 cell
+= (FDT_PCI_ADDR_CELLS
+
236 debug("(not found)\n");
240 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
242 const char *list
, *end
;
245 list
= fdt_getprop(blob
, node
, "compatible", &len
);
254 if (len
>= strlen("pciVVVV,DDDD")) {
255 s
= strstr(list
, "pci");
258 * check if the string is something like pciVVVV,DDDD.RR
259 * or just pciVVVV,DDDD
261 if (s
&& s
[7] == ',' &&
262 (s
[12] == '.' || s
[12] == 0)) {
264 *vendor
= simple_strtol(s
, NULL
, 16);
267 *device
= simple_strtol(s
, NULL
, 16);
278 int fdtdec_get_pci_bar32(struct udevice
*dev
, struct fdt_pci_addr
*addr
,
283 /* extract the bar number from fdt_pci_addr */
284 barnum
= addr
->phys_hi
& 0xff;
285 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
288 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
289 *bar
= dm_pci_read_bar32(dev
, barnum
);
295 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
296 uint64_t default_val
)
298 const uint64_t *cell64
;
301 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
302 if (!cell64
|| length
< sizeof(*cell64
))
305 return fdt64_to_cpu(*cell64
);
308 int fdtdec_get_is_enabled(const void *blob
, int node
)
313 * It should say "okay", so only allow that. Some fdts use "ok" but
314 * this is a bug. Please fix your device tree source file. See here
317 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
319 cell
= fdt_getprop(blob
, node
, "status", NULL
);
321 return 0 == strcmp(cell
, "okay");
325 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
327 enum fdt_compat_id id
;
329 /* Search our drivers */
330 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
331 if (0 == fdt_node_check_compatible(blob
, node
,
334 return COMPAT_UNKNOWN
;
337 int fdtdec_next_compatible(const void *blob
, int node
,
338 enum fdt_compat_id id
)
340 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
343 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
344 enum fdt_compat_id id
, int *depthp
)
347 node
= fdt_next_node(blob
, node
, depthp
);
348 } while (*depthp
> 1);
350 /* If this is a direct subnode, and compatible, return it */
351 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
352 blob
, node
, compat_names
[id
]))
355 return -FDT_ERR_NOTFOUND
;
358 int fdtdec_next_alias(const void *blob
, const char *name
,
359 enum fdt_compat_id id
, int *upto
)
361 #define MAX_STR_LEN 20
362 char str
[MAX_STR_LEN
+ 20];
365 /* snprintf() is not available */
366 assert(strlen(name
) < MAX_STR_LEN
);
367 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
368 node
= fdt_path_offset(blob
, str
);
371 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
375 return -FDT_ERR_NOTFOUND
;
380 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
381 enum fdt_compat_id id
, int *node_list
, int maxcount
)
383 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
385 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
388 /* TODO: Can we tighten this code up a little? */
389 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
390 enum fdt_compat_id id
, int *node_list
, int maxcount
)
392 int name_len
= strlen(name
);
400 /* find the alias node if present */
401 alias_node
= fdt_path_offset(blob
, "/aliases");
404 * start with nothing, and we can assume that the root node can't
407 memset(nodes
, '\0', sizeof(nodes
));
409 /* First find all the compatible nodes */
410 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
411 node
= fdtdec_next_compatible(blob
, node
, id
);
413 nodes
[count
++] = node
;
416 debug("%s: warning: maxcount exceeded with alias '%s'\n",
419 /* Now find all the aliases */
420 for (offset
= fdt_first_property_offset(blob
, alias_node
);
422 offset
= fdt_next_property_offset(blob
, offset
)) {
423 const struct fdt_property
*prop
;
429 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
430 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
431 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
432 node
= fdt_path_offset(blob
, prop
->data
);
436 /* Get the alias number */
437 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
438 if (number
< 0 || number
>= maxcount
) {
439 debug("%s: warning: alias '%s' is out of range\n",
444 /* Make sure the node we found is actually in our list! */
446 for (j
= 0; j
< count
; j
++)
447 if (nodes
[j
] == node
) {
453 debug("%s: warning: alias '%s' points to a node "
454 "'%s' that is missing or is not compatible "
455 " with '%s'\n", __func__
, path
,
456 fdt_get_name(blob
, node
, NULL
),
462 * Add this node to our list in the right place, and mark
465 if (fdtdec_get_is_enabled(blob
, node
)) {
466 if (node_list
[number
]) {
467 debug("%s: warning: alias '%s' requires that "
468 "a node be placed in the list in a "
469 "position which is already filled by "
470 "node '%s'\n", __func__
, path
,
471 fdt_get_name(blob
, node
, NULL
));
474 node_list
[number
] = node
;
475 if (number
>= num_found
)
476 num_found
= number
+ 1;
481 /* Add any nodes not mentioned by an alias */
482 for (i
= j
= 0; i
< maxcount
; i
++) {
484 for (; j
< maxcount
; j
++)
486 fdtdec_get_is_enabled(blob
, nodes
[j
]))
489 /* Have we run out of nodes to add? */
493 assert(!node_list
[i
]);
494 node_list
[i
] = nodes
[j
++];
503 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
506 int base_len
= strlen(base
);
507 const char *find_name
;
512 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
513 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
515 aliases
= fdt_path_offset(blob
, "/aliases");
516 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
518 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
524 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
525 debug(" - %s, %s\n", name
, prop
);
526 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
527 strncmp(name
, base
, base_len
))
530 slash
= strrchr(prop
, '/');
531 if (strcmp(slash
+ 1, find_name
))
533 val
= trailing_strtol(name
);
536 debug("Found seq %d\n", *seqp
);
541 debug("Not found\n");
545 const char *fdtdec_get_chosen_prop(const void *blob
, const char *name
)
551 chosen_node
= fdt_path_offset(blob
, "/chosen");
552 return fdt_getprop(blob
, chosen_node
, name
, NULL
);
555 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
559 prop
= fdtdec_get_chosen_prop(blob
, name
);
561 return -FDT_ERR_NOTFOUND
;
562 return fdt_path_offset(blob
, prop
);
565 int fdtdec_check_fdt(void)
568 * We must have an FDT, but we cannot panic() yet since the console
569 * is not ready. So for now, just assert(). Boards which need an early
570 * FDT (prior to console ready) will need to make their own
571 * arrangements and do their own checks.
573 assert(!fdtdec_prepare_fdt());
578 * This function is a little odd in that it accesses global data. At some
579 * point if the architecture board.c files merge this will make more sense.
580 * Even now, it is common code.
582 int fdtdec_prepare_fdt(void)
584 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
585 fdt_check_header(gd
->fdt_blob
)) {
586 #ifdef CONFIG_SPL_BUILD
587 puts("Missing DTB\n");
589 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");
592 printf("fdt_blob=%p\n", gd
->fdt_blob
);
593 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
603 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
608 debug("%s: %s\n", __func__
, prop_name
);
609 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
611 return -FDT_ERR_NOTFOUND
;
613 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
618 * Look up a property in a node and check that it has a minimum length.
620 * @param blob FDT blob
621 * @param node node to examine
622 * @param prop_name name of property to find
623 * @param min_len minimum property length in bytes
624 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
625 found, or -FDT_ERR_BADLAYOUT if not enough data
626 * @return pointer to cell, which is only valid if err == 0
628 static const void *get_prop_check_min_len(const void *blob
, int node
,
629 const char *prop_name
, int min_len
, int *err
)
634 debug("%s: %s\n", __func__
, prop_name
);
635 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
637 *err
= -FDT_ERR_NOTFOUND
;
638 else if (len
< min_len
)
639 *err
= -FDT_ERR_BADLAYOUT
;
645 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
646 u32
*array
, int count
)
651 debug("%s: %s\n", __func__
, prop_name
);
652 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
653 sizeof(u32
) * count
, &err
);
655 for (i
= 0; i
< count
; i
++)
656 array
[i
] = fdt32_to_cpu(cell
[i
]);
661 int fdtdec_get_int_array_count(const void *blob
, int node
,
662 const char *prop_name
, u32
*array
, int count
)
668 debug("%s: %s\n", __func__
, prop_name
);
669 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
671 return -FDT_ERR_NOTFOUND
;
672 elems
= len
/ sizeof(u32
);
675 for (i
= 0; i
< count
; i
++)
676 array
[i
] = fdt32_to_cpu(cell
[i
]);
681 const u32
*fdtdec_locate_array(const void *blob
, int node
,
682 const char *prop_name
, int count
)
687 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
688 sizeof(u32
) * count
, &err
);
689 return err
? NULL
: cell
;
692 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
697 debug("%s: %s\n", __func__
, prop_name
);
698 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
702 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
703 const char *list_name
,
704 const char *cells_name
,
705 int cell_count
, int index
,
706 struct fdtdec_phandle_args
*out_args
)
708 const __be32
*list
, *list_end
;
709 int rc
= 0, size
, cur_index
= 0;
714 /* Retrieve the phandle list property */
715 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
718 list_end
= list
+ size
/ sizeof(*list
);
720 /* Loop over the phandles until all the requested entry is found */
721 while (list
< list_end
) {
726 * If phandle is 0, then it is an empty entry with no
727 * arguments. Skip forward to the next entry.
729 phandle
= be32_to_cpup(list
++);
732 * Find the provider node and parse the #*-cells
733 * property to determine the argument length.
735 * This is not needed if the cell count is hard-coded
736 * (i.e. cells_name not set, but cell_count is set),
737 * except when we're going to return the found node
740 if (cells_name
|| cur_index
== index
) {
741 node
= fdt_node_offset_by_phandle(blob
,
744 debug("%s: could not find phandle\n",
745 fdt_get_name(blob
, src_node
,
752 count
= fdtdec_get_int(blob
, node
, cells_name
,
755 debug("%s: could not get %s for %s\n",
756 fdt_get_name(blob
, src_node
,
759 fdt_get_name(blob
, node
,
768 * Make sure that the arguments actually fit in the
769 * remaining property data length
771 if (list
+ count
> list_end
) {
772 debug("%s: arguments longer than property\n",
773 fdt_get_name(blob
, src_node
, NULL
));
779 * All of the error cases above bail out of the loop, so at
780 * this point, the parsing is successful. If the requested
781 * index matches, then fill the out_args structure and return,
782 * or return -ENOENT for an empty entry.
785 if (cur_index
== index
) {
792 if (count
> MAX_PHANDLE_ARGS
) {
793 debug("%s: too many arguments %d\n",
794 fdt_get_name(blob
, src_node
,
796 count
= MAX_PHANDLE_ARGS
;
798 out_args
->node
= node
;
799 out_args
->args_count
= count
;
800 for (i
= 0; i
< count
; i
++) {
802 be32_to_cpup(list
++);
806 /* Found it! return success */
816 * Result will be one of:
817 * -ENOENT : index is for empty phandle
818 * -EINVAL : parsing error on data
819 * [1..n] : Number of phandle (count mode; when index = -1)
821 rc
= index
< 0 ? cur_index
: -ENOENT
;
826 int fdtdec_get_child_count(const void *blob
, int node
)
831 fdt_for_each_subnode(blob
, subnode
, node
)
837 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
838 u8
*array
, int count
)
843 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
845 memcpy(array
, cell
, count
);
849 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
850 const char *prop_name
, int count
)
855 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
861 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
866 debug("%s: %s\n", __func__
, prop_name
);
867 config_node
= fdt_path_offset(blob
, "/config");
870 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
873 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
878 debug("%s: %s\n", __func__
, prop_name
);
879 config_node
= fdt_path_offset(blob
, "/config");
882 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
887 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
893 debug("%s: %s\n", __func__
, prop_name
);
894 nodeoffset
= fdt_path_offset(blob
, "/config");
898 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
902 return (char *)nodep
;
905 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
906 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
908 const fdt_addr_t
*cell
;
911 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
913 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
914 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
915 debug("cell=%p, len=%d\n", cell
, len
);
919 *basep
= fdt_addr_to_cpu(*cell
);
920 *sizep
= fdt_size_to_cpu(cell
[1]);
921 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
928 * Read a flash entry from the fdt
930 * @param blob FDT blob
931 * @param node Offset of node to read
932 * @param name Name of node being read
933 * @param entry Place to put offset and size of this node
934 * @return 0 if ok, -ve on error
936 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
937 struct fmap_entry
*entry
)
942 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
943 debug("Node '%s' has bad/missing 'reg' property\n", name
);
944 return -FDT_ERR_NOTFOUND
;
946 entry
->offset
= reg
[0];
947 entry
->length
= reg
[1];
948 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
949 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
950 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
951 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
952 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
953 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
954 entry
->hash
= (uint8_t *)prop
;
959 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
964 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
969 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
970 unsigned int index
, struct fdt_resource
*res
)
972 const fdt32_t
*ptr
, *end
;
973 int na
, ns
, len
, parent
;
976 parent
= fdt_parent_offset(fdt
, node
);
980 na
= fdt_address_cells(fdt
, parent
);
981 ns
= fdt_size_cells(fdt
, parent
);
983 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
987 end
= ptr
+ len
/ sizeof(*ptr
);
989 while (ptr
+ na
+ ns
<= end
) {
991 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
992 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
1000 return -FDT_ERR_NOTFOUND
;
1003 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
1004 const char *prop_names
, const char *name
,
1005 struct fdt_resource
*res
)
1009 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
1013 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1016 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1017 const char *mem_type
, const char *suffix
,
1018 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1022 fdt_size_t size
, offset_size
;
1023 fdt_addr_t base
, offset
;
1026 if (config_node
== -1) {
1027 config_node
= fdt_path_offset(blob
, "/config");
1028 if (config_node
< 0) {
1029 debug("%s: Cannot find /config node\n", __func__
);
1036 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1038 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1040 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1045 node
= fdt_path_offset(blob
, mem
);
1047 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1048 fdt_strerror(node
));
1053 * Not strictly correct - the memory may have multiple banks. We just
1056 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1057 debug("%s: Failed to decode memory region %s\n", __func__
,
1062 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1064 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1066 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1071 *basep
= base
+ offset
;
1072 *sizep
= offset_size
;
1077 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1078 struct timing_entry
*result
)
1080 int length
, ret
= 0;
1083 prop
= fdt_getprop(blob
, node
, name
, &length
);
1085 debug("%s: could not find property %s\n",
1086 fdt_get_name(blob
, node
, NULL
), name
);
1090 if (length
== sizeof(u32
)) {
1091 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1092 result
->min
= result
->typ
;
1093 result
->max
= result
->typ
;
1095 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1101 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1102 struct display_timing
*dt
)
1104 int i
, node
, timings_node
;
1108 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1109 if (timings_node
< 0)
1110 return timings_node
;
1112 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1113 node
> 0 && i
!= index
;
1114 node
= fdt_next_subnode(blob
, node
))
1120 memset(dt
, 0, sizeof(*dt
));
1122 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1124 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1126 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1127 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1128 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1130 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1132 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1133 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1134 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1138 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1140 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1141 DISPLAY_FLAGS_VSYNC_LOW
;
1143 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1145 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1146 DISPLAY_FLAGS_HSYNC_LOW
;
1148 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1150 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1151 DISPLAY_FLAGS_DE_LOW
;
1153 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1155 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1156 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1159 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1160 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1161 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1162 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1163 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1164 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1169 int fdtdec_setup(void)
1171 #if CONFIG_IS_ENABLED(OF_CONTROL)
1172 # ifdef CONFIG_OF_EMBED
1173 /* Get a pointer to the FDT */
1174 gd
->fdt_blob
= __dtb_dt_begin
;
1175 # elif defined CONFIG_OF_SEPARATE
1176 # ifdef CONFIG_SPL_BUILD
1177 /* FDT is at end of BSS unless it is in a different memory region */
1178 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS
))
1179 gd
->fdt_blob
= (ulong
*)&_image_binary_end
;
1181 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1183 /* FDT is at end of image */
1184 gd
->fdt_blob
= (ulong
*)&_end
;
1186 # elif defined(CONFIG_OF_HOSTFILE)
1187 if (sandbox_read_fdt_from_file()) {
1188 puts("Failed to read control FDT\n");
1192 # ifndef CONFIG_SPL_BUILD
1193 /* Allow the early environment to override the fdt address */
1194 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1195 (uintptr_t)gd
->fdt_blob
);
1198 return fdtdec_prepare_fdt();
1201 #endif /* !USE_HOSTCC */