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"),
69 COMPAT(ALTERA_SOCFPGA_CLK
, "altr,clk-mgr"),
70 COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE
, "pinctrl-single"),
71 COMPAT(ALTERA_SOCFPGA_H2F_BRG
, "altr,socfpga-hps2fpga-bridge"),
72 COMPAT(ALTERA_SOCFPGA_LWH2F_BRG
, "altr,socfpga-lwhps2fpga-bridge"),
73 COMPAT(ALTERA_SOCFPGA_F2H_BRG
, "altr,socfpga-fpga2hps-bridge"),
74 COMPAT(ALTERA_SOCFPGA_F2SDR0
, "altr,socfpga-fpga2sdram0-bridge"),
75 COMPAT(ALTERA_SOCFPGA_F2SDR1
, "altr,socfpga-fpga2sdram1-bridge"),
76 COMPAT(ALTERA_SOCFPGA_F2SDR2
, "altr,socfpga-fpga2sdram2-bridge"),
79 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
81 /* We allow reading of the 'unknown' ID for testing purposes */
82 assert(id
>= 0 && id
< COMPAT_COUNT
);
83 return compat_names
[id
];
86 fdt_addr_t
fdtdec_get_addr_size_fixed(const void *blob
, int node
,
87 const char *prop_name
, int index
, int na
, int ns
,
88 fdt_size_t
*sizep
, bool translate
)
90 const fdt32_t
*prop
, *prop_end
;
91 const fdt32_t
*prop_addr
, *prop_size
, *prop_after_size
;
95 debug("%s: %s: ", __func__
, prop_name
);
97 if (na
> (sizeof(fdt_addr_t
) / sizeof(fdt32_t
))) {
98 debug("(na too large for fdt_addr_t type)\n");
99 return FDT_ADDR_T_NONE
;
102 if (ns
> (sizeof(fdt_size_t
) / sizeof(fdt32_t
))) {
103 debug("(ns too large for fdt_size_t type)\n");
104 return FDT_ADDR_T_NONE
;
107 prop
= fdt_getprop(blob
, node
, prop_name
, &len
);
109 debug("(not found)\n");
110 return FDT_ADDR_T_NONE
;
112 prop_end
= prop
+ (len
/ sizeof(*prop
));
114 prop_addr
= prop
+ (index
* (na
+ ns
));
115 prop_size
= prop_addr
+ na
;
116 prop_after_size
= prop_size
+ ns
;
117 if (prop_after_size
> prop_end
) {
118 debug("(not enough data: expected >= %d cells, got %d cells)\n",
119 (u32
)(prop_after_size
- prop
), ((u32
)(prop_end
- prop
)));
120 return FDT_ADDR_T_NONE
;
123 #if CONFIG_IS_ENABLED(OF_TRANSLATE)
125 addr
= fdt_translate_address(blob
, node
, prop_addr
);
128 addr
= fdtdec_get_number(prop_addr
, na
);
131 *sizep
= fdtdec_get_number(prop_size
, ns
);
132 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr
,
133 (unsigned long long)*sizep
);
135 debug("addr=%08llx\n", (unsigned long long)addr
);
141 fdt_addr_t
fdtdec_get_addr_size_auto_parent(const void *blob
, int parent
,
142 int node
, const char *prop_name
, int index
, fdt_size_t
*sizep
,
147 debug("%s: ", __func__
);
149 na
= fdt_address_cells(blob
, parent
);
151 debug("(bad #address-cells)\n");
152 return FDT_ADDR_T_NONE
;
155 ns
= fdt_size_cells(blob
, parent
);
157 debug("(bad #size-cells)\n");
158 return FDT_ADDR_T_NONE
;
161 debug("na=%d, ns=%d, ", na
, ns
);
163 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, index
, na
,
164 ns
, sizep
, translate
);
167 fdt_addr_t
fdtdec_get_addr_size_auto_noparent(const void *blob
, int node
,
168 const char *prop_name
, int index
, fdt_size_t
*sizep
,
173 debug("%s: ", __func__
);
175 parent
= fdt_parent_offset(blob
, node
);
177 debug("(no parent found)\n");
178 return FDT_ADDR_T_NONE
;
181 return fdtdec_get_addr_size_auto_parent(blob
, parent
, node
, prop_name
,
182 index
, sizep
, translate
);
185 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
186 const char *prop_name
, fdt_size_t
*sizep
)
188 int ns
= sizep
? (sizeof(fdt_size_t
) / sizeof(fdt32_t
)) : 0;
190 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, 0,
191 sizeof(fdt_addr_t
) / sizeof(fdt32_t
),
195 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
196 const char *prop_name
)
198 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
201 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
202 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
203 const char *prop_name
, struct fdt_pci_addr
*addr
)
209 debug("%s: %s: ", __func__
, prop_name
);
212 * If we follow the pci bus bindings strictly, we should check
213 * the value of the node's parent node's #address-cells and
214 * #size-cells. They need to be 3 and 2 accordingly. However,
215 * for simplicity we skip the check here.
217 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
221 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
222 int num
= len
/ FDT_PCI_REG_SIZE
;
225 for (i
= 0; i
< num
; i
++) {
226 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
227 (ulong
)fdt32_to_cpu(cell
[0]),
228 (ulong
)fdt32_to_cpu(cell
[1]),
229 (ulong
)fdt32_to_cpu(cell
[2]));
230 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
231 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
232 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
233 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
236 cell
+= (FDT_PCI_ADDR_CELLS
+
252 debug("(not found)\n");
256 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
258 const char *list
, *end
;
261 list
= fdt_getprop(blob
, node
, "compatible", &len
);
270 if (len
>= strlen("pciVVVV,DDDD")) {
271 s
= strstr(list
, "pci");
274 * check if the string is something like pciVVVV,DDDD.RR
275 * or just pciVVVV,DDDD
277 if (s
&& s
[7] == ',' &&
278 (s
[12] == '.' || s
[12] == 0)) {
280 *vendor
= simple_strtol(s
, NULL
, 16);
283 *device
= simple_strtol(s
, NULL
, 16);
294 int fdtdec_get_pci_bar32(struct udevice
*dev
, struct fdt_pci_addr
*addr
,
299 /* extract the bar number from fdt_pci_addr */
300 barnum
= addr
->phys_hi
& 0xff;
301 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
304 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
305 *bar
= dm_pci_read_bar32(dev
, barnum
);
311 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
312 uint64_t default_val
)
314 const uint64_t *cell64
;
317 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
318 if (!cell64
|| length
< sizeof(*cell64
))
321 return fdt64_to_cpu(*cell64
);
324 int fdtdec_get_is_enabled(const void *blob
, int node
)
329 * It should say "okay", so only allow that. Some fdts use "ok" but
330 * this is a bug. Please fix your device tree source file. See here
333 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
335 cell
= fdt_getprop(blob
, node
, "status", NULL
);
337 return 0 == strcmp(cell
, "okay");
341 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
343 enum fdt_compat_id id
;
345 /* Search our drivers */
346 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
347 if (0 == fdt_node_check_compatible(blob
, node
,
350 return COMPAT_UNKNOWN
;
353 int fdtdec_next_compatible(const void *blob
, int node
,
354 enum fdt_compat_id id
)
356 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
359 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
360 enum fdt_compat_id id
, int *depthp
)
363 node
= fdt_next_node(blob
, node
, depthp
);
364 } while (*depthp
> 1);
366 /* If this is a direct subnode, and compatible, return it */
367 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
368 blob
, node
, compat_names
[id
]))
371 return -FDT_ERR_NOTFOUND
;
374 int fdtdec_next_alias(const void *blob
, const char *name
,
375 enum fdt_compat_id id
, int *upto
)
377 #define MAX_STR_LEN 20
378 char str
[MAX_STR_LEN
+ 20];
381 /* snprintf() is not available */
382 assert(strlen(name
) < MAX_STR_LEN
);
383 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
384 node
= fdt_path_offset(blob
, str
);
387 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
391 return -FDT_ERR_NOTFOUND
;
396 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
397 enum fdt_compat_id id
, int *node_list
, int maxcount
)
399 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
401 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
404 /* TODO: Can we tighten this code up a little? */
405 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
406 enum fdt_compat_id id
, int *node_list
, int maxcount
)
408 int name_len
= strlen(name
);
416 /* find the alias node if present */
417 alias_node
= fdt_path_offset(blob
, "/aliases");
420 * start with nothing, and we can assume that the root node can't
423 memset(nodes
, '\0', sizeof(nodes
));
425 /* First find all the compatible nodes */
426 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
427 node
= fdtdec_next_compatible(blob
, node
, id
);
429 nodes
[count
++] = node
;
432 debug("%s: warning: maxcount exceeded with alias '%s'\n",
435 /* Now find all the aliases */
436 for (offset
= fdt_first_property_offset(blob
, alias_node
);
438 offset
= fdt_next_property_offset(blob
, offset
)) {
439 const struct fdt_property
*prop
;
445 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
446 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
447 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
448 node
= fdt_path_offset(blob
, prop
->data
);
452 /* Get the alias number */
453 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
454 if (number
< 0 || number
>= maxcount
) {
455 debug("%s: warning: alias '%s' is out of range\n",
460 /* Make sure the node we found is actually in our list! */
462 for (j
= 0; j
< count
; j
++)
463 if (nodes
[j
] == node
) {
469 debug("%s: warning: alias '%s' points to a node "
470 "'%s' that is missing or is not compatible "
471 " with '%s'\n", __func__
, path
,
472 fdt_get_name(blob
, node
, NULL
),
478 * Add this node to our list in the right place, and mark
481 if (fdtdec_get_is_enabled(blob
, node
)) {
482 if (node_list
[number
]) {
483 debug("%s: warning: alias '%s' requires that "
484 "a node be placed in the list in a "
485 "position which is already filled by "
486 "node '%s'\n", __func__
, path
,
487 fdt_get_name(blob
, node
, NULL
));
490 node_list
[number
] = node
;
491 if (number
>= num_found
)
492 num_found
= number
+ 1;
497 /* Add any nodes not mentioned by an alias */
498 for (i
= j
= 0; i
< maxcount
; i
++) {
500 for (; j
< maxcount
; j
++)
502 fdtdec_get_is_enabled(blob
, nodes
[j
]))
505 /* Have we run out of nodes to add? */
509 assert(!node_list
[i
]);
510 node_list
[i
] = nodes
[j
++];
519 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
522 int base_len
= strlen(base
);
523 const char *find_name
;
528 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
529 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
531 aliases
= fdt_path_offset(blob
, "/aliases");
532 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
534 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
540 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
541 debug(" - %s, %s\n", name
, prop
);
542 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
543 strncmp(name
, base
, base_len
))
546 slash
= strrchr(prop
, '/');
547 if (strcmp(slash
+ 1, find_name
))
549 val
= trailing_strtol(name
);
552 debug("Found seq %d\n", *seqp
);
557 debug("Not found\n");
561 const char *fdtdec_get_chosen_prop(const void *blob
, const char *name
)
567 chosen_node
= fdt_path_offset(blob
, "/chosen");
568 return fdt_getprop(blob
, chosen_node
, name
, NULL
);
571 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
575 prop
= fdtdec_get_chosen_prop(blob
, name
);
577 return -FDT_ERR_NOTFOUND
;
578 return fdt_path_offset(blob
, prop
);
581 int fdtdec_check_fdt(void)
584 * We must have an FDT, but we cannot panic() yet since the console
585 * is not ready. So for now, just assert(). Boards which need an early
586 * FDT (prior to console ready) will need to make their own
587 * arrangements and do their own checks.
589 assert(!fdtdec_prepare_fdt());
594 * This function is a little odd in that it accesses global data. At some
595 * point if the architecture board.c files merge this will make more sense.
596 * Even now, it is common code.
598 int fdtdec_prepare_fdt(void)
600 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
601 fdt_check_header(gd
->fdt_blob
)) {
602 #ifdef CONFIG_SPL_BUILD
603 puts("Missing DTB\n");
605 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");
608 printf("fdt_blob=%p\n", gd
->fdt_blob
);
609 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
619 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
624 debug("%s: %s\n", __func__
, prop_name
);
625 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
627 return -FDT_ERR_NOTFOUND
;
629 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
634 * Look up a property in a node and check that it has a minimum length.
636 * @param blob FDT blob
637 * @param node node to examine
638 * @param prop_name name of property to find
639 * @param min_len minimum property length in bytes
640 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
641 found, or -FDT_ERR_BADLAYOUT if not enough data
642 * @return pointer to cell, which is only valid if err == 0
644 static const void *get_prop_check_min_len(const void *blob
, int node
,
645 const char *prop_name
, int min_len
, int *err
)
650 debug("%s: %s\n", __func__
, prop_name
);
651 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
653 *err
= -FDT_ERR_NOTFOUND
;
654 else if (len
< min_len
)
655 *err
= -FDT_ERR_BADLAYOUT
;
661 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
662 u32
*array
, int count
)
667 debug("%s: %s\n", __func__
, prop_name
);
668 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
669 sizeof(u32
) * count
, &err
);
671 for (i
= 0; i
< count
; i
++)
672 array
[i
] = fdt32_to_cpu(cell
[i
]);
677 int fdtdec_get_int_array_count(const void *blob
, int node
,
678 const char *prop_name
, u32
*array
, int count
)
684 debug("%s: %s\n", __func__
, prop_name
);
685 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
687 return -FDT_ERR_NOTFOUND
;
688 elems
= len
/ sizeof(u32
);
691 for (i
= 0; i
< count
; i
++)
692 array
[i
] = fdt32_to_cpu(cell
[i
]);
697 const u32
*fdtdec_locate_array(const void *blob
, int node
,
698 const char *prop_name
, int count
)
703 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
704 sizeof(u32
) * count
, &err
);
705 return err
? NULL
: cell
;
708 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
713 debug("%s: %s\n", __func__
, prop_name
);
714 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
718 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
719 const char *list_name
,
720 const char *cells_name
,
721 int cell_count
, int index
,
722 struct fdtdec_phandle_args
*out_args
)
724 const __be32
*list
, *list_end
;
725 int rc
= 0, size
, cur_index
= 0;
730 /* Retrieve the phandle list property */
731 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
734 list_end
= list
+ size
/ sizeof(*list
);
736 /* Loop over the phandles until all the requested entry is found */
737 while (list
< list_end
) {
742 * If phandle is 0, then it is an empty entry with no
743 * arguments. Skip forward to the next entry.
745 phandle
= be32_to_cpup(list
++);
748 * Find the provider node and parse the #*-cells
749 * property to determine the argument length.
751 * This is not needed if the cell count is hard-coded
752 * (i.e. cells_name not set, but cell_count is set),
753 * except when we're going to return the found node
756 if (cells_name
|| cur_index
== index
) {
757 node
= fdt_node_offset_by_phandle(blob
,
760 debug("%s: could not find phandle\n",
761 fdt_get_name(blob
, src_node
,
768 count
= fdtdec_get_int(blob
, node
, cells_name
,
771 debug("%s: could not get %s for %s\n",
772 fdt_get_name(blob
, src_node
,
775 fdt_get_name(blob
, node
,
784 * Make sure that the arguments actually fit in the
785 * remaining property data length
787 if (list
+ count
> list_end
) {
788 debug("%s: arguments longer than property\n",
789 fdt_get_name(blob
, src_node
, NULL
));
795 * All of the error cases above bail out of the loop, so at
796 * this point, the parsing is successful. If the requested
797 * index matches, then fill the out_args structure and return,
798 * or return -ENOENT for an empty entry.
801 if (cur_index
== index
) {
808 if (count
> MAX_PHANDLE_ARGS
) {
809 debug("%s: too many arguments %d\n",
810 fdt_get_name(blob
, src_node
,
812 count
= MAX_PHANDLE_ARGS
;
814 out_args
->node
= node
;
815 out_args
->args_count
= count
;
816 for (i
= 0; i
< count
; i
++) {
818 be32_to_cpup(list
++);
822 /* Found it! return success */
832 * Result will be one of:
833 * -ENOENT : index is for empty phandle
834 * -EINVAL : parsing error on data
835 * [1..n] : Number of phandle (count mode; when index = -1)
837 rc
= index
< 0 ? cur_index
: -ENOENT
;
842 int fdtdec_get_child_count(const void *blob
, int node
)
847 fdt_for_each_subnode(subnode
, blob
, node
)
853 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
854 u8
*array
, int count
)
859 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
861 memcpy(array
, cell
, count
);
865 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
866 const char *prop_name
, int count
)
871 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
877 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
882 debug("%s: %s\n", __func__
, prop_name
);
883 config_node
= fdt_path_offset(blob
, "/config");
886 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
889 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
894 debug("%s: %s\n", __func__
, prop_name
);
895 config_node
= fdt_path_offset(blob
, "/config");
898 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
903 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
909 debug("%s: %s\n", __func__
, prop_name
);
910 nodeoffset
= fdt_path_offset(blob
, "/config");
914 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
918 return (char *)nodep
;
921 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
922 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
924 const fdt_addr_t
*cell
;
927 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
929 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
930 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
931 debug("cell=%p, len=%d\n", cell
, len
);
935 *basep
= fdt_addr_to_cpu(*cell
);
936 *sizep
= fdt_size_to_cpu(cell
[1]);
937 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
944 * Read a flash entry from the fdt
946 * @param blob FDT blob
947 * @param node Offset of node to read
948 * @param name Name of node being read
949 * @param entry Place to put offset and size of this node
950 * @return 0 if ok, -ve on error
952 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
953 struct fmap_entry
*entry
)
958 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
959 debug("Node '%s' has bad/missing 'reg' property\n", name
);
960 return -FDT_ERR_NOTFOUND
;
962 entry
->offset
= reg
[0];
963 entry
->length
= reg
[1];
964 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
965 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
966 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
967 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
968 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
969 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
970 entry
->hash
= (uint8_t *)prop
;
975 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
980 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
985 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
986 unsigned int index
, struct fdt_resource
*res
)
988 const fdt32_t
*ptr
, *end
;
989 int na
, ns
, len
, parent
;
992 parent
= fdt_parent_offset(fdt
, node
);
996 na
= fdt_address_cells(fdt
, parent
);
997 ns
= fdt_size_cells(fdt
, parent
);
999 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
1003 end
= ptr
+ len
/ sizeof(*ptr
);
1005 while (ptr
+ na
+ ns
<= end
) {
1007 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
1008 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
1016 return -FDT_ERR_NOTFOUND
;
1019 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
1020 const char *prop_names
, const char *name
,
1021 struct fdt_resource
*res
)
1025 index
= fdt_stringlist_search(fdt
, node
, prop_names
, name
);
1029 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1032 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1033 const char *mem_type
, const char *suffix
,
1034 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1038 fdt_size_t size
, offset_size
;
1039 fdt_addr_t base
, offset
;
1042 if (config_node
== -1) {
1043 config_node
= fdt_path_offset(blob
, "/config");
1044 if (config_node
< 0) {
1045 debug("%s: Cannot find /config node\n", __func__
);
1052 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1054 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1056 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1061 node
= fdt_path_offset(blob
, mem
);
1063 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1064 fdt_strerror(node
));
1069 * Not strictly correct - the memory may have multiple banks. We just
1072 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1073 debug("%s: Failed to decode memory region %s\n", __func__
,
1078 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1080 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1082 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1087 *basep
= base
+ offset
;
1088 *sizep
= offset_size
;
1093 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1094 struct timing_entry
*result
)
1096 int length
, ret
= 0;
1099 prop
= fdt_getprop(blob
, node
, name
, &length
);
1101 debug("%s: could not find property %s\n",
1102 fdt_get_name(blob
, node
, NULL
), name
);
1106 if (length
== sizeof(u32
)) {
1107 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1108 result
->min
= result
->typ
;
1109 result
->max
= result
->typ
;
1111 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1117 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1118 struct display_timing
*dt
)
1120 int i
, node
, timings_node
;
1124 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1125 if (timings_node
< 0)
1126 return timings_node
;
1128 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1129 node
> 0 && i
!= index
;
1130 node
= fdt_next_subnode(blob
, node
))
1136 memset(dt
, 0, sizeof(*dt
));
1138 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1140 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1142 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1143 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1144 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1146 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1148 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1149 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1150 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1154 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1156 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1157 DISPLAY_FLAGS_VSYNC_LOW
;
1159 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1161 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1162 DISPLAY_FLAGS_HSYNC_LOW
;
1164 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1166 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1167 DISPLAY_FLAGS_DE_LOW
;
1169 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1171 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1172 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1175 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1176 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1177 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1178 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1179 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1180 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1185 int fdtdec_setup_memory_size(void)
1188 struct fdt_resource res
;
1190 mem
= fdt_path_offset(gd
->fdt_blob
, "/memory");
1192 debug("%s: Missing /memory node\n", __func__
);
1196 ret
= fdt_get_resource(gd
->fdt_blob
, mem
, "reg", 0, &res
);
1198 debug("%s: Unable to decode first memory bank\n", __func__
);
1202 gd
->ram_size
= (phys_size_t
)(res
.end
- res
.start
+ 1);
1203 debug("%s: Initial DRAM size %llx\n", __func__
, (u64
)gd
->ram_size
);
1208 #if defined(CONFIG_NR_DRAM_BANKS)
1209 int fdtdec_setup_memory_banksize(void)
1212 struct fdt_resource res
;
1214 mem
= fdt_path_offset(gd
->fdt_blob
, "/memory");
1216 debug("%s: Missing /memory node\n", __func__
);
1220 for (bank
= 0; bank
< CONFIG_NR_DRAM_BANKS
; bank
++) {
1221 ret
= fdt_get_resource(gd
->fdt_blob
, mem
, "reg", bank
, &res
);
1222 if (ret
== -FDT_ERR_NOTFOUND
)
1227 gd
->bd
->bi_dram
[bank
].start
= (phys_addr_t
)res
.start
;
1228 gd
->bd
->bi_dram
[bank
].size
=
1229 (phys_size_t
)(res
.end
- res
.start
+ 1);
1231 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
1233 (unsigned long long)gd
->bd
->bi_dram
[bank
].start
,
1234 (unsigned long long)gd
->bd
->bi_dram
[bank
].size
);
1241 int fdtdec_setup(void)
1243 #if CONFIG_IS_ENABLED(OF_CONTROL)
1244 # ifdef CONFIG_OF_EMBED
1245 /* Get a pointer to the FDT */
1246 gd
->fdt_blob
= __dtb_dt_begin
;
1247 # elif defined CONFIG_OF_SEPARATE
1248 # ifdef CONFIG_SPL_BUILD
1249 /* FDT is at end of BSS unless it is in a different memory region */
1250 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS
))
1251 gd
->fdt_blob
= (ulong
*)&_image_binary_end
;
1253 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1255 /* FDT is at end of image */
1256 gd
->fdt_blob
= (ulong
*)&_end
;
1258 # elif defined(CONFIG_OF_HOSTFILE)
1259 if (sandbox_read_fdt_from_file()) {
1260 puts("Failed to read control FDT\n");
1264 # ifndef CONFIG_SPL_BUILD
1265 /* Allow the early environment to override the fdt address */
1266 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1267 (uintptr_t)gd
->fdt_blob
);
1270 return fdtdec_prepare_fdt();
1273 #endif /* !USE_HOSTCC */