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_DC
, "nvidia,tegra124-dc"),
31 COMPAT(NVIDIA_TEGRA124_SOR
, "nvidia,tegra124-sor"),
32 COMPAT(NVIDIA_TEGRA124_PMC
, "nvidia,tegra124-pmc"),
33 COMPAT(NVIDIA_TEGRA20_DC
, "nvidia,tegra20-dc"),
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(SANDBOX_LCD_SDL
, "sandbox,lcd-sdl"),
60 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
61 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
62 COMPAT(MEMORY_SPD
, "memory-spd"),
63 COMPAT(INTEL_PANTHERPOINT_AHCI
, "intel,pantherpoint-ahci"),
64 COMPAT(INTEL_MODEL_206AX
, "intel,model-206ax"),
65 COMPAT(INTEL_GMA
, "intel,gma"),
66 COMPAT(AMS_AS3722
, "ams,as3722"),
67 COMPAT(INTEL_ICH_SPI
, "intel,ich-spi"),
68 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
69 COMPAT(INTEL_X86_PINCTRL
, "intel,x86-pinctrl"),
70 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
71 COMPAT(COMPAT_INTEL_PCH
, "intel,bd82x6x"),
72 COMPAT(COMPAT_INTEL_IRQ_ROUTER
, "intel,irq-router"),
73 COMPAT(ALTERA_SOCFPGA_DWMAC
, "altr,socfpga-stmmac"),
74 COMPAT(ALTERA_SOCFPGA_DWMMC
, "altr,socfpga-dw-mshc"),
75 COMPAT(ALTERA_SOCFPGA_DWC2USB
, "snps,dwc2"),
76 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP
, "intel,baytrail-fsp"),
77 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP
, "intel,baytrail-fsp-mdp"),
80 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
82 /* We allow reading of the 'unknown' ID for testing purposes */
83 assert(id
>= 0 && id
< COMPAT_COUNT
);
84 return compat_names
[id
];
87 fdt_addr_t
fdtdec_get_addr_size_fixed(const void *blob
, int node
,
88 const char *prop_name
, int index
, int na
, int ns
,
91 const fdt32_t
*prop
, *prop_end
;
92 const fdt32_t
*prop_addr
, *prop_size
, *prop_after_size
;
96 debug("%s: %s: ", __func__
, prop_name
);
98 if (na
> (sizeof(fdt_addr_t
) / sizeof(fdt32_t
))) {
99 debug("(na too large for fdt_addr_t type)\n");
100 return FDT_ADDR_T_NONE
;
103 if (ns
> (sizeof(fdt_size_t
) / sizeof(fdt32_t
))) {
104 debug("(ns too large for fdt_size_t type)\n");
105 return FDT_ADDR_T_NONE
;
108 prop
= fdt_getprop(blob
, node
, prop_name
, &len
);
110 debug("(not found)\n");
111 return FDT_ADDR_T_NONE
;
113 prop_end
= prop
+ (len
/ sizeof(*prop
));
115 prop_addr
= prop
+ (index
* (na
+ ns
));
116 prop_size
= prop_addr
+ na
;
117 prop_after_size
= prop_size
+ ns
;
118 if (prop_after_size
> prop_end
) {
119 debug("(not enough data: expected >= %d cells, got %d cells)\n",
120 (u32
)(prop_after_size
- prop
), ((u32
)(prop_end
- prop
)));
121 return FDT_ADDR_T_NONE
;
124 addr
= fdtdec_get_number(prop_addr
, na
);
127 *sizep
= fdtdec_get_number(prop_size
, ns
);
128 debug("addr=%08llx, size=%llx\n", (u64
)addr
, (u64
)*sizep
);
130 debug("addr=%08llx\n", (u64
)addr
);
136 fdt_addr_t
fdtdec_get_addr_size_auto_parent(const void *blob
, int parent
,
137 int node
, const char *prop_name
, int index
, fdt_size_t
*sizep
)
141 debug("%s: ", __func__
);
143 na
= fdt_address_cells(blob
, parent
);
145 debug("(bad #address-cells)\n");
146 return FDT_ADDR_T_NONE
;
149 ns
= fdt_size_cells(blob
, parent
);
151 debug("(bad #size-cells)\n");
152 return FDT_ADDR_T_NONE
;
155 debug("na=%d, ns=%d, ", na
, ns
);
157 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, index
, na
,
161 fdt_addr_t
fdtdec_get_addr_size_auto_noparent(const void *blob
, int node
,
162 const char *prop_name
, int index
, fdt_size_t
*sizep
)
166 debug("%s: ", __func__
);
168 parent
= fdt_parent_offset(blob
, node
);
170 debug("(no parent found)\n");
171 return FDT_ADDR_T_NONE
;
174 return fdtdec_get_addr_size_auto_parent(blob
, parent
, node
, prop_name
,
178 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
179 const char *prop_name
, fdt_size_t
*sizep
)
181 int ns
= sizep
? (sizeof(fdt_size_t
) / sizeof(fdt32_t
)) : 0;
183 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, 0,
184 sizeof(fdt_addr_t
) / sizeof(fdt32_t
),
188 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
189 const char *prop_name
)
191 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
194 #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)
195 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
196 const char *prop_name
, struct fdt_pci_addr
*addr
)
202 debug("%s: %s: ", __func__
, prop_name
);
205 * If we follow the pci bus bindings strictly, we should check
206 * the value of the node's parent node's #address-cells and
207 * #size-cells. They need to be 3 and 2 accordingly. However,
208 * for simplicity we skip the check here.
210 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
214 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
215 int num
= len
/ FDT_PCI_REG_SIZE
;
218 for (i
= 0; i
< num
; i
++) {
219 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
220 (ulong
)fdt32_to_cpu(cell
[0]),
221 (ulong
)fdt32_to_cpu(cell
[1]),
222 (ulong
)fdt32_to_cpu(cell
[2]));
223 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
224 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
225 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
226 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
229 cell
+= (FDT_PCI_ADDR_CELLS
+
245 debug("(not found)\n");
249 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
251 const char *list
, *end
;
254 list
= fdt_getprop(blob
, node
, "compatible", &len
);
263 if (len
>= strlen("pciVVVV,DDDD")) {
264 s
= strstr(list
, "pci");
267 * check if the string is something like pciVVVV,DDDD.RR
268 * or just pciVVVV,DDDD
270 if (s
&& s
[7] == ',' &&
271 (s
[12] == '.' || s
[12] == 0)) {
273 *vendor
= simple_strtol(s
, NULL
, 16);
276 *device
= simple_strtol(s
, NULL
, 16);
287 int fdtdec_get_pci_bar32(struct udevice
*dev
, struct fdt_pci_addr
*addr
,
292 /* extract the bar number from fdt_pci_addr */
293 barnum
= addr
->phys_hi
& 0xff;
294 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
297 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
298 *bar
= dm_pci_read_bar32(dev
, barnum
);
304 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
305 uint64_t default_val
)
307 const uint64_t *cell64
;
310 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
311 if (!cell64
|| length
< sizeof(*cell64
))
314 return fdt64_to_cpu(*cell64
);
317 int fdtdec_get_is_enabled(const void *blob
, int node
)
322 * It should say "okay", so only allow that. Some fdts use "ok" but
323 * this is a bug. Please fix your device tree source file. See here
326 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
328 cell
= fdt_getprop(blob
, node
, "status", NULL
);
330 return 0 == strcmp(cell
, "okay");
334 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
336 enum fdt_compat_id id
;
338 /* Search our drivers */
339 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
340 if (0 == fdt_node_check_compatible(blob
, node
,
343 return COMPAT_UNKNOWN
;
346 int fdtdec_next_compatible(const void *blob
, int node
,
347 enum fdt_compat_id id
)
349 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
352 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
353 enum fdt_compat_id id
, int *depthp
)
356 node
= fdt_next_node(blob
, node
, depthp
);
357 } while (*depthp
> 1);
359 /* If this is a direct subnode, and compatible, return it */
360 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
361 blob
, node
, compat_names
[id
]))
364 return -FDT_ERR_NOTFOUND
;
367 int fdtdec_next_alias(const void *blob
, const char *name
,
368 enum fdt_compat_id id
, int *upto
)
370 #define MAX_STR_LEN 20
371 char str
[MAX_STR_LEN
+ 20];
374 /* snprintf() is not available */
375 assert(strlen(name
) < MAX_STR_LEN
);
376 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
377 node
= fdt_path_offset(blob
, str
);
380 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
384 return -FDT_ERR_NOTFOUND
;
389 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
390 enum fdt_compat_id id
, int *node_list
, int maxcount
)
392 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
394 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
397 /* TODO: Can we tighten this code up a little? */
398 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
399 enum fdt_compat_id id
, int *node_list
, int maxcount
)
401 int name_len
= strlen(name
);
409 /* find the alias node if present */
410 alias_node
= fdt_path_offset(blob
, "/aliases");
413 * start with nothing, and we can assume that the root node can't
416 memset(nodes
, '\0', sizeof(nodes
));
418 /* First find all the compatible nodes */
419 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
420 node
= fdtdec_next_compatible(blob
, node
, id
);
422 nodes
[count
++] = node
;
425 debug("%s: warning: maxcount exceeded with alias '%s'\n",
428 /* Now find all the aliases */
429 for (offset
= fdt_first_property_offset(blob
, alias_node
);
431 offset
= fdt_next_property_offset(blob
, offset
)) {
432 const struct fdt_property
*prop
;
438 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
439 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
440 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
441 node
= fdt_path_offset(blob
, prop
->data
);
445 /* Get the alias number */
446 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
447 if (number
< 0 || number
>= maxcount
) {
448 debug("%s: warning: alias '%s' is out of range\n",
453 /* Make sure the node we found is actually in our list! */
455 for (j
= 0; j
< count
; j
++)
456 if (nodes
[j
] == node
) {
462 debug("%s: warning: alias '%s' points to a node "
463 "'%s' that is missing or is not compatible "
464 " with '%s'\n", __func__
, path
,
465 fdt_get_name(blob
, node
, NULL
),
471 * Add this node to our list in the right place, and mark
474 if (fdtdec_get_is_enabled(blob
, node
)) {
475 if (node_list
[number
]) {
476 debug("%s: warning: alias '%s' requires that "
477 "a node be placed in the list in a "
478 "position which is already filled by "
479 "node '%s'\n", __func__
, path
,
480 fdt_get_name(blob
, node
, NULL
));
483 node_list
[number
] = node
;
484 if (number
>= num_found
)
485 num_found
= number
+ 1;
490 /* Add any nodes not mentioned by an alias */
491 for (i
= j
= 0; i
< maxcount
; i
++) {
493 for (; j
< maxcount
; j
++)
495 fdtdec_get_is_enabled(blob
, nodes
[j
]))
498 /* Have we run out of nodes to add? */
502 assert(!node_list
[i
]);
503 node_list
[i
] = nodes
[j
++];
512 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
515 int base_len
= strlen(base
);
516 const char *find_name
;
521 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
522 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
524 aliases
= fdt_path_offset(blob
, "/aliases");
525 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
527 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
533 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
534 debug(" - %s, %s\n", name
, prop
);
535 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
536 strncmp(name
, base
, base_len
))
539 slash
= strrchr(prop
, '/');
540 if (strcmp(slash
+ 1, find_name
))
542 val
= trailing_strtol(name
);
545 debug("Found seq %d\n", *seqp
);
550 debug("Not found\n");
554 const char *fdtdec_get_chosen_prop(const void *blob
, const char *name
)
560 chosen_node
= fdt_path_offset(blob
, "/chosen");
561 return fdt_getprop(blob
, chosen_node
, name
, NULL
);
564 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
568 prop
= fdtdec_get_chosen_prop(blob
, name
);
570 return -FDT_ERR_NOTFOUND
;
571 return fdt_path_offset(blob
, prop
);
574 int fdtdec_check_fdt(void)
577 * We must have an FDT, but we cannot panic() yet since the console
578 * is not ready. So for now, just assert(). Boards which need an early
579 * FDT (prior to console ready) will need to make their own
580 * arrangements and do their own checks.
582 assert(!fdtdec_prepare_fdt());
587 * This function is a little odd in that it accesses global data. At some
588 * point if the architecture board.c files merge this will make more sense.
589 * Even now, it is common code.
591 int fdtdec_prepare_fdt(void)
593 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
594 fdt_check_header(gd
->fdt_blob
)) {
595 #ifdef CONFIG_SPL_BUILD
596 puts("Missing DTB\n");
598 puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
601 printf("fdt_blob=%p\n", gd
->fdt_blob
);
602 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
612 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
617 debug("%s: %s\n", __func__
, prop_name
);
618 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
620 return -FDT_ERR_NOTFOUND
;
622 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
627 * Look up a property in a node and check that it has a minimum length.
629 * @param blob FDT blob
630 * @param node node to examine
631 * @param prop_name name of property to find
632 * @param min_len minimum property length in bytes
633 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
634 found, or -FDT_ERR_BADLAYOUT if not enough data
635 * @return pointer to cell, which is only valid if err == 0
637 static const void *get_prop_check_min_len(const void *blob
, int node
,
638 const char *prop_name
, int min_len
, int *err
)
643 debug("%s: %s\n", __func__
, prop_name
);
644 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
646 *err
= -FDT_ERR_NOTFOUND
;
647 else if (len
< min_len
)
648 *err
= -FDT_ERR_BADLAYOUT
;
654 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
655 u32
*array
, int count
)
660 debug("%s: %s\n", __func__
, prop_name
);
661 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
662 sizeof(u32
) * count
, &err
);
664 for (i
= 0; i
< count
; i
++)
665 array
[i
] = fdt32_to_cpu(cell
[i
]);
670 int fdtdec_get_int_array_count(const void *blob
, int node
,
671 const char *prop_name
, u32
*array
, int count
)
677 debug("%s: %s\n", __func__
, prop_name
);
678 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
680 return -FDT_ERR_NOTFOUND
;
681 elems
= len
/ sizeof(u32
);
684 for (i
= 0; i
< count
; i
++)
685 array
[i
] = fdt32_to_cpu(cell
[i
]);
690 const u32
*fdtdec_locate_array(const void *blob
, int node
,
691 const char *prop_name
, int count
)
696 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
697 sizeof(u32
) * count
, &err
);
698 return err
? NULL
: cell
;
701 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
706 debug("%s: %s\n", __func__
, prop_name
);
707 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
711 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
712 const char *list_name
,
713 const char *cells_name
,
714 int cell_count
, int index
,
715 struct fdtdec_phandle_args
*out_args
)
717 const __be32
*list
, *list_end
;
718 int rc
= 0, size
, cur_index
= 0;
723 /* Retrieve the phandle list property */
724 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
727 list_end
= list
+ size
/ sizeof(*list
);
729 /* Loop over the phandles until all the requested entry is found */
730 while (list
< list_end
) {
735 * If phandle is 0, then it is an empty entry with no
736 * arguments. Skip forward to the next entry.
738 phandle
= be32_to_cpup(list
++);
741 * Find the provider node and parse the #*-cells
742 * property to determine the argument length.
744 * This is not needed if the cell count is hard-coded
745 * (i.e. cells_name not set, but cell_count is set),
746 * except when we're going to return the found node
749 if (cells_name
|| cur_index
== index
) {
750 node
= fdt_node_offset_by_phandle(blob
,
753 debug("%s: could not find phandle\n",
754 fdt_get_name(blob
, src_node
,
761 count
= fdtdec_get_int(blob
, node
, cells_name
,
764 debug("%s: could not get %s for %s\n",
765 fdt_get_name(blob
, src_node
,
768 fdt_get_name(blob
, node
,
777 * Make sure that the arguments actually fit in the
778 * remaining property data length
780 if (list
+ count
> list_end
) {
781 debug("%s: arguments longer than property\n",
782 fdt_get_name(blob
, src_node
, NULL
));
788 * All of the error cases above bail out of the loop, so at
789 * this point, the parsing is successful. If the requested
790 * index matches, then fill the out_args structure and return,
791 * or return -ENOENT for an empty entry.
794 if (cur_index
== index
) {
801 if (count
> MAX_PHANDLE_ARGS
) {
802 debug("%s: too many arguments %d\n",
803 fdt_get_name(blob
, src_node
,
805 count
= MAX_PHANDLE_ARGS
;
807 out_args
->node
= node
;
808 out_args
->args_count
= count
;
809 for (i
= 0; i
< count
; i
++) {
811 be32_to_cpup(list
++);
815 /* Found it! return success */
825 * Result will be one of:
826 * -ENOENT : index is for empty phandle
827 * -EINVAL : parsing error on data
828 * [1..n] : Number of phandle (count mode; when index = -1)
830 rc
= index
< 0 ? cur_index
: -ENOENT
;
835 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
836 u8
*array
, int count
)
841 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
843 memcpy(array
, cell
, count
);
847 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
848 const char *prop_name
, int count
)
853 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
859 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
864 debug("%s: %s\n", __func__
, prop_name
);
865 config_node
= fdt_path_offset(blob
, "/config");
868 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
871 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
876 debug("%s: %s\n", __func__
, prop_name
);
877 config_node
= fdt_path_offset(blob
, "/config");
880 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
885 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
891 debug("%s: %s\n", __func__
, prop_name
);
892 nodeoffset
= fdt_path_offset(blob
, "/config");
896 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
900 return (char *)nodep
;
903 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
904 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
906 const fdt_addr_t
*cell
;
909 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
911 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
912 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
913 debug("cell=%p, len=%d\n", cell
, len
);
917 *basep
= fdt_addr_to_cpu(*cell
);
918 *sizep
= fdt_size_to_cpu(cell
[1]);
919 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
926 * Read a flash entry from the fdt
928 * @param blob FDT blob
929 * @param node Offset of node to read
930 * @param name Name of node being read
931 * @param entry Place to put offset and size of this node
932 * @return 0 if ok, -ve on error
934 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
935 struct fmap_entry
*entry
)
940 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
941 debug("Node '%s' has bad/missing 'reg' property\n", name
);
942 return -FDT_ERR_NOTFOUND
;
944 entry
->offset
= reg
[0];
945 entry
->length
= reg
[1];
946 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
947 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
948 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
949 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
950 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
951 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
952 entry
->hash
= (uint8_t *)prop
;
957 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
962 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
967 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
968 unsigned int index
, struct fdt_resource
*res
)
970 const fdt32_t
*ptr
, *end
;
971 int na
, ns
, len
, parent
;
974 parent
= fdt_parent_offset(fdt
, node
);
978 na
= fdt_address_cells(fdt
, parent
);
979 ns
= fdt_size_cells(fdt
, parent
);
981 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
985 end
= ptr
+ len
/ sizeof(*ptr
);
987 while (ptr
+ na
+ ns
<= end
) {
989 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
990 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
998 return -FDT_ERR_NOTFOUND
;
1001 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
1002 const char *prop_names
, const char *name
,
1003 struct fdt_resource
*res
)
1007 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
1011 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1014 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1015 const char *mem_type
, const char *suffix
,
1016 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1020 fdt_size_t size
, offset_size
;
1021 fdt_addr_t base
, offset
;
1024 if (config_node
== -1) {
1025 config_node
= fdt_path_offset(blob
, "/config");
1026 if (config_node
< 0) {
1027 debug("%s: Cannot find /config node\n", __func__
);
1034 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1036 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1038 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1043 node
= fdt_path_offset(blob
, mem
);
1045 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1046 fdt_strerror(node
));
1051 * Not strictly correct - the memory may have multiple banks. We just
1054 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1055 debug("%s: Failed to decode memory region %s\n", __func__
,
1060 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1062 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1064 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1069 *basep
= base
+ offset
;
1070 *sizep
= offset_size
;
1075 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1076 struct timing_entry
*result
)
1078 int length
, ret
= 0;
1081 prop
= fdt_getprop(blob
, node
, name
, &length
);
1083 debug("%s: could not find property %s\n",
1084 fdt_get_name(blob
, node
, NULL
), name
);
1088 if (length
== sizeof(u32
)) {
1089 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1090 result
->min
= result
->typ
;
1091 result
->max
= result
->typ
;
1093 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1099 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1100 struct display_timing
*dt
)
1102 int i
, node
, timings_node
;
1106 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1107 if (timings_node
< 0)
1108 return timings_node
;
1110 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1111 node
> 0 && i
!= index
;
1112 node
= fdt_next_subnode(blob
, node
))
1118 memset(dt
, 0, sizeof(*dt
));
1120 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1122 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1124 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1125 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1126 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1128 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1130 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1131 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1132 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1136 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1138 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1139 DISPLAY_FLAGS_VSYNC_LOW
;
1141 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1143 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1144 DISPLAY_FLAGS_HSYNC_LOW
;
1146 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1148 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1149 DISPLAY_FLAGS_DE_LOW
;
1151 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1153 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1154 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1157 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1158 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1159 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1160 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1161 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1162 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1167 int fdtdec_setup(void)
1169 #if CONFIG_IS_ENABLED(OF_CONTROL)
1170 # ifdef CONFIG_OF_EMBED
1171 /* Get a pointer to the FDT */
1172 gd
->fdt_blob
= __dtb_dt_begin
;
1173 # elif defined CONFIG_OF_SEPARATE
1174 # ifdef CONFIG_SPL_BUILD
1175 /* FDT is at end of BSS unless it is in a different memory region */
1176 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS
))
1177 gd
->fdt_blob
= (ulong
*)&_image_binary_end
;
1179 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1181 /* FDT is at end of image */
1182 gd
->fdt_blob
= (ulong
*)&_end
;
1184 # elif defined(CONFIG_OF_HOSTFILE)
1185 if (sandbox_read_fdt_from_file()) {
1186 puts("Failed to read control FDT\n");
1190 # ifndef CONFIG_SPL_BUILD
1191 /* Allow the early environment to override the fdt address */
1192 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1193 (uintptr_t)gd
->fdt_blob
);
1196 return fdtdec_prepare_fdt();
1199 #endif /* !USE_HOSTCC */