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 #define COMPAT(id, name) name
24 static const char * const compat_names
[COMPAT_COUNT
] = {
25 COMPAT(UNKNOWN
, "<none>"),
26 COMPAT(NVIDIA_TEGRA20_EMC
, "nvidia,tegra20-emc"),
27 COMPAT(NVIDIA_TEGRA20_EMC_TABLE
, "nvidia,tegra20-emc-table"),
28 COMPAT(NVIDIA_TEGRA20_NAND
, "nvidia,tegra20-nand"),
29 COMPAT(NVIDIA_TEGRA20_PWM
, "nvidia,tegra20-pwm"),
30 COMPAT(NVIDIA_TEGRA124_SOR
, "nvidia,tegra124-sor"),
31 COMPAT(NVIDIA_TEGRA124_PMC
, "nvidia,tegra124-pmc"),
32 COMPAT(NVIDIA_TEGRA20_DC
, "nvidia,tegra20-dc"),
33 COMPAT(NVIDIA_TEGRA186_SDMMC
, "nvidia,tegra186-sdhci"),
34 COMPAT(NVIDIA_TEGRA210_SDMMC
, "nvidia,tegra210-sdhci"),
35 COMPAT(NVIDIA_TEGRA124_SDMMC
, "nvidia,tegra124-sdhci"),
36 COMPAT(NVIDIA_TEGRA30_SDMMC
, "nvidia,tegra30-sdhci"),
37 COMPAT(NVIDIA_TEGRA20_SDMMC
, "nvidia,tegra20-sdhci"),
38 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL
, "nvidia,tegra124-xusb-padctl"),
39 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL
, "nvidia,tegra210-xusb-padctl"),
40 COMPAT(SMSC_LAN9215
, "smsc,lan9215"),
41 COMPAT(SAMSUNG_EXYNOS5_SROMC
, "samsung,exynos-sromc"),
42 COMPAT(SAMSUNG_S3C2440_I2C
, "samsung,s3c2440-i2c"),
43 COMPAT(SAMSUNG_EXYNOS5_SOUND
, "samsung,exynos-sound"),
44 COMPAT(WOLFSON_WM8994_CODEC
, "wolfson,wm8994-codec"),
45 COMPAT(GOOGLE_CROS_EC_KEYB
, "google,cros-ec-keyb"),
46 COMPAT(SAMSUNG_EXYNOS_USB_PHY
, "samsung,exynos-usb-phy"),
47 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY
, "samsung,exynos5250-usb3-phy"),
48 COMPAT(SAMSUNG_EXYNOS_TMU
, "samsung,exynos-tmu"),
49 COMPAT(SAMSUNG_EXYNOS_FIMD
, "samsung,exynos-fimd"),
50 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI
, "samsung,exynos-mipi-dsi"),
51 COMPAT(SAMSUNG_EXYNOS5_DP
, "samsung,exynos5-dp"),
52 COMPAT(SAMSUNG_EXYNOS_DWMMC
, "samsung,exynos-dwmmc"),
53 COMPAT(SAMSUNG_EXYNOS_MMC
, "samsung,exynos-mmc"),
54 COMPAT(SAMSUNG_EXYNOS_SERIAL
, "samsung,exynos4210-uart"),
55 COMPAT(MAXIM_MAX77686_PMIC
, "maxim,max77686"),
56 COMPAT(GENERIC_SPI_FLASH
, "spi-flash"),
57 COMPAT(MAXIM_98095_CODEC
, "maxim,max98095-codec"),
58 COMPAT(SAMSUNG_EXYNOS5_I2C
, "samsung,exynos5-hsi2c"),
59 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
60 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
61 COMPAT(INTEL_PANTHERPOINT_AHCI
, "intel,pantherpoint-ahci"),
62 COMPAT(INTEL_MODEL_206AX
, "intel,model-206ax"),
63 COMPAT(INTEL_GMA
, "intel,gma"),
64 COMPAT(AMS_AS3722
, "ams,as3722"),
65 COMPAT(INTEL_ICH_SPI
, "intel,ich-spi"),
66 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
67 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
68 COMPAT(COMPAT_INTEL_PCH
, "intel,bd82x6x"),
69 COMPAT(ALTERA_SOCFPGA_DWMAC
, "altr,socfpga-stmmac"),
70 COMPAT(ALTERA_SOCFPGA_DWMMC
, "altr,socfpga-dw-mshc"),
71 COMPAT(ALTERA_SOCFPGA_DWC2USB
, "snps,dwc2"),
72 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP
, "intel,baytrail-fsp"),
73 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP
, "intel,baytrail-fsp-mdp"),
74 COMPAT(COMPAT_INTEL_IVYBRIDGE_FSP
, "intel,ivybridge-fsp"),
77 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
79 /* We allow reading of the 'unknown' ID for testing purposes */
80 assert(id
>= 0 && id
< COMPAT_COUNT
);
81 return compat_names
[id
];
84 fdt_addr_t
fdtdec_get_addr_size_fixed(const void *blob
, int node
,
85 const char *prop_name
, int index
, int na
, int ns
,
88 const fdt32_t
*prop
, *prop_end
;
89 const fdt32_t
*prop_addr
, *prop_size
, *prop_after_size
;
93 debug("%s: %s: ", __func__
, prop_name
);
95 if (na
> (sizeof(fdt_addr_t
) / sizeof(fdt32_t
))) {
96 debug("(na too large for fdt_addr_t type)\n");
97 return FDT_ADDR_T_NONE
;
100 if (ns
> (sizeof(fdt_size_t
) / sizeof(fdt32_t
))) {
101 debug("(ns too large for fdt_size_t type)\n");
102 return FDT_ADDR_T_NONE
;
105 prop
= fdt_getprop(blob
, node
, prop_name
, &len
);
107 debug("(not found)\n");
108 return FDT_ADDR_T_NONE
;
110 prop_end
= prop
+ (len
/ sizeof(*prop
));
112 prop_addr
= prop
+ (index
* (na
+ ns
));
113 prop_size
= prop_addr
+ na
;
114 prop_after_size
= prop_size
+ ns
;
115 if (prop_after_size
> prop_end
) {
116 debug("(not enough data: expected >= %d cells, got %d cells)\n",
117 (u32
)(prop_after_size
- prop
), ((u32
)(prop_end
- prop
)));
118 return FDT_ADDR_T_NONE
;
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
)
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
,
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
)
164 debug("%s: ", __func__
);
166 parent
= fdt_parent_offset(blob
, node
);
168 debug("(no parent found)\n");
169 return FDT_ADDR_T_NONE
;
172 return fdtdec_get_addr_size_auto_parent(blob
, parent
, node
, prop_name
,
176 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
177 const char *prop_name
, fdt_size_t
*sizep
)
179 int ns
= sizep
? (sizeof(fdt_size_t
) / sizeof(fdt32_t
)) : 0;
181 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, 0,
182 sizeof(fdt_addr_t
) / sizeof(fdt32_t
),
186 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
187 const char *prop_name
)
189 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
192 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
193 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
194 const char *prop_name
, struct fdt_pci_addr
*addr
)
200 debug("%s: %s: ", __func__
, prop_name
);
203 * If we follow the pci bus bindings strictly, we should check
204 * the value of the node's parent node's #address-cells and
205 * #size-cells. They need to be 3 and 2 accordingly. However,
206 * for simplicity we skip the check here.
208 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
212 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
213 int num
= len
/ FDT_PCI_REG_SIZE
;
216 for (i
= 0; i
< num
; i
++) {
217 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
218 (ulong
)fdt32_to_cpu(cell
[0]),
219 (ulong
)fdt32_to_cpu(cell
[1]),
220 (ulong
)fdt32_to_cpu(cell
[2]));
221 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
222 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
223 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
224 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
227 cell
+= (FDT_PCI_ADDR_CELLS
+
243 debug("(not found)\n");
247 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
249 const char *list
, *end
;
252 list
= fdt_getprop(blob
, node
, "compatible", &len
);
261 if (len
>= strlen("pciVVVV,DDDD")) {
262 s
= strstr(list
, "pci");
265 * check if the string is something like pciVVVV,DDDD.RR
266 * or just pciVVVV,DDDD
268 if (s
&& s
[7] == ',' &&
269 (s
[12] == '.' || s
[12] == 0)) {
271 *vendor
= simple_strtol(s
, NULL
, 16);
274 *device
= simple_strtol(s
, NULL
, 16);
285 int fdtdec_get_pci_bar32(struct udevice
*dev
, struct fdt_pci_addr
*addr
,
290 /* extract the bar number from fdt_pci_addr */
291 barnum
= addr
->phys_hi
& 0xff;
292 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
295 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
296 *bar
= dm_pci_read_bar32(dev
, barnum
);
302 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
303 uint64_t default_val
)
305 const uint64_t *cell64
;
308 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
309 if (!cell64
|| length
< sizeof(*cell64
))
312 return fdt64_to_cpu(*cell64
);
315 int fdtdec_get_is_enabled(const void *blob
, int node
)
320 * It should say "okay", so only allow that. Some fdts use "ok" but
321 * this is a bug. Please fix your device tree source file. See here
324 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
326 cell
= fdt_getprop(blob
, node
, "status", NULL
);
328 return 0 == strcmp(cell
, "okay");
332 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
334 enum fdt_compat_id id
;
336 /* Search our drivers */
337 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
338 if (0 == fdt_node_check_compatible(blob
, node
,
341 return COMPAT_UNKNOWN
;
344 int fdtdec_next_compatible(const void *blob
, int node
,
345 enum fdt_compat_id id
)
347 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
350 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
351 enum fdt_compat_id id
, int *depthp
)
354 node
= fdt_next_node(blob
, node
, depthp
);
355 } while (*depthp
> 1);
357 /* If this is a direct subnode, and compatible, return it */
358 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
359 blob
, node
, compat_names
[id
]))
362 return -FDT_ERR_NOTFOUND
;
365 int fdtdec_next_alias(const void *blob
, const char *name
,
366 enum fdt_compat_id id
, int *upto
)
368 #define MAX_STR_LEN 20
369 char str
[MAX_STR_LEN
+ 20];
372 /* snprintf() is not available */
373 assert(strlen(name
) < MAX_STR_LEN
);
374 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
375 node
= fdt_path_offset(blob
, str
);
378 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
382 return -FDT_ERR_NOTFOUND
;
387 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
388 enum fdt_compat_id id
, int *node_list
, int maxcount
)
390 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
392 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
395 /* TODO: Can we tighten this code up a little? */
396 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
397 enum fdt_compat_id id
, int *node_list
, int maxcount
)
399 int name_len
= strlen(name
);
407 /* find the alias node if present */
408 alias_node
= fdt_path_offset(blob
, "/aliases");
411 * start with nothing, and we can assume that the root node can't
414 memset(nodes
, '\0', sizeof(nodes
));
416 /* First find all the compatible nodes */
417 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
418 node
= fdtdec_next_compatible(blob
, node
, id
);
420 nodes
[count
++] = node
;
423 debug("%s: warning: maxcount exceeded with alias '%s'\n",
426 /* Now find all the aliases */
427 for (offset
= fdt_first_property_offset(blob
, alias_node
);
429 offset
= fdt_next_property_offset(blob
, offset
)) {
430 const struct fdt_property
*prop
;
436 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
437 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
438 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
439 node
= fdt_path_offset(blob
, prop
->data
);
443 /* Get the alias number */
444 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
445 if (number
< 0 || number
>= maxcount
) {
446 debug("%s: warning: alias '%s' is out of range\n",
451 /* Make sure the node we found is actually in our list! */
453 for (j
= 0; j
< count
; j
++)
454 if (nodes
[j
] == node
) {
460 debug("%s: warning: alias '%s' points to a node "
461 "'%s' that is missing or is not compatible "
462 " with '%s'\n", __func__
, path
,
463 fdt_get_name(blob
, node
, NULL
),
469 * Add this node to our list in the right place, and mark
472 if (fdtdec_get_is_enabled(blob
, node
)) {
473 if (node_list
[number
]) {
474 debug("%s: warning: alias '%s' requires that "
475 "a node be placed in the list in a "
476 "position which is already filled by "
477 "node '%s'\n", __func__
, path
,
478 fdt_get_name(blob
, node
, NULL
));
481 node_list
[number
] = node
;
482 if (number
>= num_found
)
483 num_found
= number
+ 1;
488 /* Add any nodes not mentioned by an alias */
489 for (i
= j
= 0; i
< maxcount
; i
++) {
491 for (; j
< maxcount
; j
++)
493 fdtdec_get_is_enabled(blob
, nodes
[j
]))
496 /* Have we run out of nodes to add? */
500 assert(!node_list
[i
]);
501 node_list
[i
] = nodes
[j
++];
510 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
513 int base_len
= strlen(base
);
514 const char *find_name
;
519 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
520 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
522 aliases
= fdt_path_offset(blob
, "/aliases");
523 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
525 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
531 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
532 debug(" - %s, %s\n", name
, prop
);
533 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
534 strncmp(name
, base
, base_len
))
537 slash
= strrchr(prop
, '/');
538 if (strcmp(slash
+ 1, find_name
))
540 val
= trailing_strtol(name
);
543 debug("Found seq %d\n", *seqp
);
548 debug("Not found\n");
552 const char *fdtdec_get_chosen_prop(const void *blob
, const char *name
)
558 chosen_node
= fdt_path_offset(blob
, "/chosen");
559 return fdt_getprop(blob
, chosen_node
, name
, NULL
);
562 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
566 prop
= fdtdec_get_chosen_prop(blob
, name
);
568 return -FDT_ERR_NOTFOUND
;
569 return fdt_path_offset(blob
, prop
);
572 int fdtdec_check_fdt(void)
575 * We must have an FDT, but we cannot panic() yet since the console
576 * is not ready. So for now, just assert(). Boards which need an early
577 * FDT (prior to console ready) will need to make their own
578 * arrangements and do their own checks.
580 assert(!fdtdec_prepare_fdt());
585 * This function is a little odd in that it accesses global data. At some
586 * point if the architecture board.c files merge this will make more sense.
587 * Even now, it is common code.
589 int fdtdec_prepare_fdt(void)
591 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
592 fdt_check_header(gd
->fdt_blob
)) {
593 #ifdef CONFIG_SPL_BUILD
594 puts("Missing DTB\n");
596 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");
599 printf("fdt_blob=%p\n", gd
->fdt_blob
);
600 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
610 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
615 debug("%s: %s\n", __func__
, prop_name
);
616 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
618 return -FDT_ERR_NOTFOUND
;
620 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
625 * Look up a property in a node and check that it has a minimum length.
627 * @param blob FDT blob
628 * @param node node to examine
629 * @param prop_name name of property to find
630 * @param min_len minimum property length in bytes
631 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
632 found, or -FDT_ERR_BADLAYOUT if not enough data
633 * @return pointer to cell, which is only valid if err == 0
635 static const void *get_prop_check_min_len(const void *blob
, int node
,
636 const char *prop_name
, int min_len
, int *err
)
641 debug("%s: %s\n", __func__
, prop_name
);
642 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
644 *err
= -FDT_ERR_NOTFOUND
;
645 else if (len
< min_len
)
646 *err
= -FDT_ERR_BADLAYOUT
;
652 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
653 u32
*array
, int count
)
658 debug("%s: %s\n", __func__
, prop_name
);
659 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
660 sizeof(u32
) * count
, &err
);
662 for (i
= 0; i
< count
; i
++)
663 array
[i
] = fdt32_to_cpu(cell
[i
]);
668 int fdtdec_get_int_array_count(const void *blob
, int node
,
669 const char *prop_name
, u32
*array
, int count
)
675 debug("%s: %s\n", __func__
, prop_name
);
676 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
678 return -FDT_ERR_NOTFOUND
;
679 elems
= len
/ sizeof(u32
);
682 for (i
= 0; i
< count
; i
++)
683 array
[i
] = fdt32_to_cpu(cell
[i
]);
688 const u32
*fdtdec_locate_array(const void *blob
, int node
,
689 const char *prop_name
, int count
)
694 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
695 sizeof(u32
) * count
, &err
);
696 return err
? NULL
: cell
;
699 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
704 debug("%s: %s\n", __func__
, prop_name
);
705 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
709 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
710 const char *list_name
,
711 const char *cells_name
,
712 int cell_count
, int index
,
713 struct fdtdec_phandle_args
*out_args
)
715 const __be32
*list
, *list_end
;
716 int rc
= 0, size
, cur_index
= 0;
721 /* Retrieve the phandle list property */
722 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
725 list_end
= list
+ size
/ sizeof(*list
);
727 /* Loop over the phandles until all the requested entry is found */
728 while (list
< list_end
) {
733 * If phandle is 0, then it is an empty entry with no
734 * arguments. Skip forward to the next entry.
736 phandle
= be32_to_cpup(list
++);
739 * Find the provider node and parse the #*-cells
740 * property to determine the argument length.
742 * This is not needed if the cell count is hard-coded
743 * (i.e. cells_name not set, but cell_count is set),
744 * except when we're going to return the found node
747 if (cells_name
|| cur_index
== index
) {
748 node
= fdt_node_offset_by_phandle(blob
,
751 debug("%s: could not find phandle\n",
752 fdt_get_name(blob
, src_node
,
759 count
= fdtdec_get_int(blob
, node
, cells_name
,
762 debug("%s: could not get %s for %s\n",
763 fdt_get_name(blob
, src_node
,
766 fdt_get_name(blob
, node
,
775 * Make sure that the arguments actually fit in the
776 * remaining property data length
778 if (list
+ count
> list_end
) {
779 debug("%s: arguments longer than property\n",
780 fdt_get_name(blob
, src_node
, NULL
));
786 * All of the error cases above bail out of the loop, so at
787 * this point, the parsing is successful. If the requested
788 * index matches, then fill the out_args structure and return,
789 * or return -ENOENT for an empty entry.
792 if (cur_index
== index
) {
799 if (count
> MAX_PHANDLE_ARGS
) {
800 debug("%s: too many arguments %d\n",
801 fdt_get_name(blob
, src_node
,
803 count
= MAX_PHANDLE_ARGS
;
805 out_args
->node
= node
;
806 out_args
->args_count
= count
;
807 for (i
= 0; i
< count
; i
++) {
809 be32_to_cpup(list
++);
813 /* Found it! return success */
823 * Result will be one of:
824 * -ENOENT : index is for empty phandle
825 * -EINVAL : parsing error on data
826 * [1..n] : Number of phandle (count mode; when index = -1)
828 rc
= index
< 0 ? cur_index
: -ENOENT
;
833 int fdtdec_get_child_count(const void *blob
, int node
)
838 fdt_for_each_subnode(blob
, subnode
, node
)
844 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
845 u8
*array
, int count
)
850 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
852 memcpy(array
, cell
, count
);
856 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
857 const char *prop_name
, int count
)
862 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
868 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
873 debug("%s: %s\n", __func__
, prop_name
);
874 config_node
= fdt_path_offset(blob
, "/config");
877 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
880 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
885 debug("%s: %s\n", __func__
, prop_name
);
886 config_node
= fdt_path_offset(blob
, "/config");
889 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
894 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
900 debug("%s: %s\n", __func__
, prop_name
);
901 nodeoffset
= fdt_path_offset(blob
, "/config");
905 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
909 return (char *)nodep
;
912 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
913 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
915 const fdt_addr_t
*cell
;
918 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
920 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
921 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
922 debug("cell=%p, len=%d\n", cell
, len
);
926 *basep
= fdt_addr_to_cpu(*cell
);
927 *sizep
= fdt_size_to_cpu(cell
[1]);
928 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
935 * Read a flash entry from the fdt
937 * @param blob FDT blob
938 * @param node Offset of node to read
939 * @param name Name of node being read
940 * @param entry Place to put offset and size of this node
941 * @return 0 if ok, -ve on error
943 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
944 struct fmap_entry
*entry
)
949 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
950 debug("Node '%s' has bad/missing 'reg' property\n", name
);
951 return -FDT_ERR_NOTFOUND
;
953 entry
->offset
= reg
[0];
954 entry
->length
= reg
[1];
955 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
956 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
957 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
958 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
959 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
960 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
961 entry
->hash
= (uint8_t *)prop
;
966 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
971 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
976 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
977 unsigned int index
, struct fdt_resource
*res
)
979 const fdt32_t
*ptr
, *end
;
980 int na
, ns
, len
, parent
;
983 parent
= fdt_parent_offset(fdt
, node
);
987 na
= fdt_address_cells(fdt
, parent
);
988 ns
= fdt_size_cells(fdt
, parent
);
990 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
994 end
= ptr
+ len
/ sizeof(*ptr
);
996 while (ptr
+ na
+ ns
<= end
) {
998 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
999 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
1007 return -FDT_ERR_NOTFOUND
;
1010 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
1011 const char *prop_names
, const char *name
,
1012 struct fdt_resource
*res
)
1016 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
1020 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1023 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1024 const char *mem_type
, const char *suffix
,
1025 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1029 fdt_size_t size
, offset_size
;
1030 fdt_addr_t base
, offset
;
1033 if (config_node
== -1) {
1034 config_node
= fdt_path_offset(blob
, "/config");
1035 if (config_node
< 0) {
1036 debug("%s: Cannot find /config node\n", __func__
);
1043 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1045 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1047 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1052 node
= fdt_path_offset(blob
, mem
);
1054 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1055 fdt_strerror(node
));
1060 * Not strictly correct - the memory may have multiple banks. We just
1063 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1064 debug("%s: Failed to decode memory region %s\n", __func__
,
1069 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1071 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1073 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1078 *basep
= base
+ offset
;
1079 *sizep
= offset_size
;
1084 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1085 struct timing_entry
*result
)
1087 int length
, ret
= 0;
1090 prop
= fdt_getprop(blob
, node
, name
, &length
);
1092 debug("%s: could not find property %s\n",
1093 fdt_get_name(blob
, node
, NULL
), name
);
1097 if (length
== sizeof(u32
)) {
1098 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1099 result
->min
= result
->typ
;
1100 result
->max
= result
->typ
;
1102 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1108 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1109 struct display_timing
*dt
)
1111 int i
, node
, timings_node
;
1115 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1116 if (timings_node
< 0)
1117 return timings_node
;
1119 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1120 node
> 0 && i
!= index
;
1121 node
= fdt_next_subnode(blob
, node
))
1127 memset(dt
, 0, sizeof(*dt
));
1129 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1131 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1133 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1134 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1135 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1137 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1139 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1140 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1141 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1145 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1147 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1148 DISPLAY_FLAGS_VSYNC_LOW
;
1150 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1152 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1153 DISPLAY_FLAGS_HSYNC_LOW
;
1155 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1157 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1158 DISPLAY_FLAGS_DE_LOW
;
1160 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1162 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1163 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1166 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1167 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1168 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1169 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1170 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1171 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1176 int fdtdec_setup(void)
1178 #if CONFIG_IS_ENABLED(OF_CONTROL)
1179 # ifdef CONFIG_OF_EMBED
1180 /* Get a pointer to the FDT */
1181 gd
->fdt_blob
= __dtb_dt_begin
;
1182 # elif defined CONFIG_OF_SEPARATE
1183 # ifdef CONFIG_SPL_BUILD
1184 /* FDT is at end of BSS unless it is in a different memory region */
1185 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS
))
1186 gd
->fdt_blob
= (ulong
*)&_image_binary_end
;
1188 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1190 /* FDT is at end of image */
1191 gd
->fdt_blob
= (ulong
*)&_end
;
1193 # elif defined(CONFIG_OF_HOSTFILE)
1194 if (sandbox_read_fdt_from_file()) {
1195 puts("Failed to read control FDT\n");
1199 # ifndef CONFIG_SPL_BUILD
1200 /* Allow the early environment to override the fdt address */
1201 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1202 (uintptr_t)gd
->fdt_blob
);
1205 return fdtdec_prepare_fdt();
1208 #endif /* !USE_HOSTCC */