2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/sections.h>
13 #include <linux/ctype.h>
15 DECLARE_GLOBAL_DATA_PTR
;
18 * Here are the type we know about. One day we might allow drivers to
19 * register. For now we just put them here. The COMPAT macro allows us to
20 * turn this into a sparse list later, and keeps the ID with the name.
22 #define COMPAT(id, name) name
23 static const char * const compat_names
[COMPAT_COUNT
] = {
24 COMPAT(UNKNOWN
, "<none>"),
25 COMPAT(NVIDIA_TEGRA20_USB
, "nvidia,tegra20-ehci"),
26 COMPAT(NVIDIA_TEGRA30_USB
, "nvidia,tegra30-ehci"),
27 COMPAT(NVIDIA_TEGRA114_USB
, "nvidia,tegra114-ehci"),
28 COMPAT(NVIDIA_TEGRA20_EMC
, "nvidia,tegra20-emc"),
29 COMPAT(NVIDIA_TEGRA20_EMC_TABLE
, "nvidia,tegra20-emc-table"),
30 COMPAT(NVIDIA_TEGRA20_KBC
, "nvidia,tegra20-kbc"),
31 COMPAT(NVIDIA_TEGRA20_NAND
, "nvidia,tegra20-nand"),
32 COMPAT(NVIDIA_TEGRA20_PWM
, "nvidia,tegra20-pwm"),
33 COMPAT(NVIDIA_TEGRA20_DC
, "nvidia,tegra20-dc"),
34 COMPAT(NVIDIA_TEGRA124_SDMMC
, "nvidia,tegra124-sdhci"),
35 COMPAT(NVIDIA_TEGRA30_SDMMC
, "nvidia,tegra30-sdhci"),
36 COMPAT(NVIDIA_TEGRA20_SDMMC
, "nvidia,tegra20-sdhci"),
37 COMPAT(NVIDIA_TEGRA124_PCIE
, "nvidia,tegra124-pcie"),
38 COMPAT(NVIDIA_TEGRA30_PCIE
, "nvidia,tegra30-pcie"),
39 COMPAT(NVIDIA_TEGRA20_PCIE
, "nvidia,tegra20-pcie"),
40 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL
, "nvidia,tegra124-xusb-padctl"),
41 COMPAT(SMSC_LAN9215
, "smsc,lan9215"),
42 COMPAT(SAMSUNG_EXYNOS5_SROMC
, "samsung,exynos-sromc"),
43 COMPAT(SAMSUNG_S3C2440_I2C
, "samsung,s3c2440-i2c"),
44 COMPAT(SAMSUNG_EXYNOS5_SOUND
, "samsung,exynos-sound"),
45 COMPAT(WOLFSON_WM8994_CODEC
, "wolfson,wm8994-codec"),
46 COMPAT(GOOGLE_CROS_EC_KEYB
, "google,cros-ec-keyb"),
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_FIMD
, "samsung,exynos-fimd"),
51 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI
, "samsung,exynos-mipi-dsi"),
52 COMPAT(SAMSUNG_EXYNOS5_DP
, "samsung,exynos5-dp"),
53 COMPAT(SAMSUNG_EXYNOS_DWMMC
, "samsung,exynos-dwmmc"),
54 COMPAT(SAMSUNG_EXYNOS_MMC
, "samsung,exynos-mmc"),
55 COMPAT(SAMSUNG_EXYNOS_SERIAL
, "samsung,exynos4210-uart"),
56 COMPAT(MAXIM_MAX77686_PMIC
, "maxim,max77686_pmic"),
57 COMPAT(GENERIC_SPI_FLASH
, "spi-flash"),
58 COMPAT(MAXIM_98095_CODEC
, "maxim,max98095-codec"),
59 COMPAT(INFINEON_SLB9635_TPM
, "infineon,slb9635-tpm"),
60 COMPAT(INFINEON_SLB9645_TPM
, "infineon,slb9645-tpm"),
61 COMPAT(SAMSUNG_EXYNOS5_I2C
, "samsung,exynos5-hsi2c"),
62 COMPAT(SANDBOX_LCD_SDL
, "sandbox,lcd-sdl"),
63 COMPAT(TI_TPS65090
, "ti,tps65090"),
64 COMPAT(COMPAT_NXP_PTN3460
, "nxp,ptn3460"),
65 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
66 COMPAT(PARADE_PS8625
, "parade,ps8625"),
67 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
68 COMPAT(MEMORY_SPD
, "memory-spd"),
69 COMPAT(INTEL_PANTHERPOINT_AHCI
, "intel,pantherpoint-ahci"),
70 COMPAT(INTEL_MODEL_206AX
, "intel,model-206ax"),
71 COMPAT(INTEL_GMA
, "intel,gma"),
72 COMPAT(AMS_AS3722
, "ams,as3722"),
73 COMPAT(INTEL_ICH_SPI
, "intel,ich-spi"),
74 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
75 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
76 COMPAT(COMPAT_INTEL_PCH
, "intel,bd82x6x"),
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(const void *blob
, int node
,
87 const char *prop_name
, fdt_size_t
*sizep
)
89 const fdt_addr_t
*cell
;
92 debug("%s: %s: ", __func__
, prop_name
);
93 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
94 if (cell
&& ((!sizep
&& len
== sizeof(fdt_addr_t
)) ||
95 len
== sizeof(fdt_addr_t
) * 2)) {
96 fdt_addr_t addr
= fdt_addr_to_cpu(*cell
);
98 const fdt_size_t
*size
;
100 size
= (fdt_size_t
*)((char *)cell
+
102 *sizep
= fdt_size_to_cpu(*size
);
103 debug("addr=%08lx, size=%08x\n",
104 (ulong
)addr
, *sizep
);
106 debug("%08lx\n", (ulong
)addr
);
110 debug("(not found)\n");
111 return FDT_ADDR_T_NONE
;
114 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
115 const char *prop_name
)
117 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
121 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
122 const char *prop_name
, struct fdt_pci_addr
*addr
)
128 debug("%s: %s: ", __func__
, prop_name
);
131 * If we follow the pci bus bindings strictly, we should check
132 * the value of the node's parent node's #address-cells and
133 * #size-cells. They need to be 3 and 2 accordingly. However,
134 * for simplicity we skip the check here.
136 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
140 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
141 int num
= len
/ FDT_PCI_REG_SIZE
;
144 for (i
= 0; i
< num
; i
++) {
145 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
146 (ulong
)fdt_addr_to_cpu(cell
[0]),
147 (ulong
)fdt_addr_to_cpu(cell
[1]),
148 (ulong
)fdt_addr_to_cpu(cell
[2]));
149 if ((fdt_addr_to_cpu(*cell
) & type
) == type
) {
150 addr
->phys_hi
= fdt_addr_to_cpu(cell
[0]);
151 addr
->phys_mid
= fdt_addr_to_cpu(cell
[1]);
152 addr
->phys_lo
= fdt_addr_to_cpu(cell
[2]);
155 cell
+= (FDT_PCI_ADDR_CELLS
+
171 debug("(not found)\n");
175 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
177 const char *list
, *end
;
180 list
= fdt_getprop(blob
, node
, "compatible", &len
);
189 if (len
>= strlen("pciVVVV,DDDD")) {
190 s
= strstr(list
, "pci");
193 * check if the string is something like pciVVVV,DDDD.RR
194 * or just pciVVVV,DDDD
196 if (s
&& s
[7] == ',' &&
197 (s
[12] == '.' || s
[12] == 0)) {
199 *vendor
= simple_strtol(s
, NULL
, 16);
202 *device
= simple_strtol(s
, NULL
, 16);
214 int fdtdec_get_pci_bdf(const void *blob
, int node
,
215 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
217 u16 dt_vendor
, dt_device
, vendor
, device
;
220 /* get vendor id & device id from the compatible string */
221 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
225 /* extract the bdf from fdt_pci_addr */
226 *bdf
= addr
->phys_hi
& 0xffff00;
228 /* read vendor id & device id based on bdf */
229 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
230 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
233 * Note there are two places in the device tree to fully describe
234 * a pci device: one is via compatible string with a format of
235 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
236 * the device node's reg address property. We read the vendor id
237 * and device id based on bdf and compare the values with the
238 * "VVVV,DDDD". If they are the same, then we are good to use bdf
239 * to read device's bar. But if they are different, we have to rely
240 * on the vendor id and device id extracted from the compatible
241 * string and locate the real bdf by pci_find_device(). This is
242 * because normally we may only know device's device number and
243 * function number when writing device tree. The bus number is
244 * dynamically assigned during the pci enumeration process.
246 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
247 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
255 int fdtdec_get_pci_bar32(const void *blob
, int node
,
256 struct fdt_pci_addr
*addr
, u32
*bar
)
262 /* get pci devices's bdf */
263 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
267 /* extract the bar number from fdt_pci_addr */
268 barnum
= addr
->phys_hi
& 0xff;
269 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
272 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
273 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
279 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
280 uint64_t default_val
)
282 const uint64_t *cell64
;
285 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
286 if (!cell64
|| length
< sizeof(*cell64
))
289 return fdt64_to_cpu(*cell64
);
292 int fdtdec_get_is_enabled(const void *blob
, int node
)
297 * It should say "okay", so only allow that. Some fdts use "ok" but
298 * this is a bug. Please fix your device tree source file. See here
301 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
303 cell
= fdt_getprop(blob
, node
, "status", NULL
);
305 return 0 == strcmp(cell
, "okay");
309 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
311 enum fdt_compat_id id
;
313 /* Search our drivers */
314 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
315 if (0 == fdt_node_check_compatible(blob
, node
,
318 return COMPAT_UNKNOWN
;
321 int fdtdec_next_compatible(const void *blob
, int node
,
322 enum fdt_compat_id id
)
324 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
327 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
328 enum fdt_compat_id id
, int *depthp
)
331 node
= fdt_next_node(blob
, node
, depthp
);
332 } while (*depthp
> 1);
334 /* If this is a direct subnode, and compatible, return it */
335 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
336 blob
, node
, compat_names
[id
]))
339 return -FDT_ERR_NOTFOUND
;
342 int fdtdec_next_alias(const void *blob
, const char *name
,
343 enum fdt_compat_id id
, int *upto
)
345 #define MAX_STR_LEN 20
346 char str
[MAX_STR_LEN
+ 20];
349 /* snprintf() is not available */
350 assert(strlen(name
) < MAX_STR_LEN
);
351 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
352 node
= fdt_path_offset(blob
, str
);
355 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
359 return -FDT_ERR_NOTFOUND
;
364 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
365 enum fdt_compat_id id
, int *node_list
, int maxcount
)
367 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
369 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
372 /* TODO: Can we tighten this code up a little? */
373 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
374 enum fdt_compat_id id
, int *node_list
, int maxcount
)
376 int name_len
= strlen(name
);
384 /* find the alias node if present */
385 alias_node
= fdt_path_offset(blob
, "/aliases");
388 * start with nothing, and we can assume that the root node can't
391 memset(nodes
, '\0', sizeof(nodes
));
393 /* First find all the compatible nodes */
394 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
395 node
= fdtdec_next_compatible(blob
, node
, id
);
397 nodes
[count
++] = node
;
400 debug("%s: warning: maxcount exceeded with alias '%s'\n",
403 /* Now find all the aliases */
404 for (offset
= fdt_first_property_offset(blob
, alias_node
);
406 offset
= fdt_next_property_offset(blob
, offset
)) {
407 const struct fdt_property
*prop
;
413 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
414 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
415 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
416 node
= fdt_path_offset(blob
, prop
->data
);
420 /* Get the alias number */
421 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
422 if (number
< 0 || number
>= maxcount
) {
423 debug("%s: warning: alias '%s' is out of range\n",
428 /* Make sure the node we found is actually in our list! */
430 for (j
= 0; j
< count
; j
++)
431 if (nodes
[j
] == node
) {
437 debug("%s: warning: alias '%s' points to a node "
438 "'%s' that is missing or is not compatible "
439 " with '%s'\n", __func__
, path
,
440 fdt_get_name(blob
, node
, NULL
),
446 * Add this node to our list in the right place, and mark
449 if (fdtdec_get_is_enabled(blob
, node
)) {
450 if (node_list
[number
]) {
451 debug("%s: warning: alias '%s' requires that "
452 "a node be placed in the list in a "
453 "position which is already filled by "
454 "node '%s'\n", __func__
, path
,
455 fdt_get_name(blob
, node
, NULL
));
458 node_list
[number
] = node
;
459 if (number
>= num_found
)
460 num_found
= number
+ 1;
465 /* Add any nodes not mentioned by an alias */
466 for (i
= j
= 0; i
< maxcount
; i
++) {
468 for (; j
< maxcount
; j
++)
470 fdtdec_get_is_enabled(blob
, nodes
[j
]))
473 /* Have we run out of nodes to add? */
477 assert(!node_list
[i
]);
478 node_list
[i
] = nodes
[j
++];
487 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
490 int base_len
= strlen(base
);
491 const char *find_name
;
496 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
497 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
499 aliases
= fdt_path_offset(blob
, "/aliases");
500 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
502 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
509 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
510 debug(" - %s, %s\n", name
, prop
);
511 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
512 strncmp(name
, base
, base_len
))
515 slash
= strrchr(prop
, '/');
516 if (strcmp(slash
+ 1, find_name
))
518 for (p
= name
+ strlen(name
) - 1; p
> name
; p
--) {
520 *seqp
= simple_strtoul(p
+ 1, NULL
, 10);
521 debug("Found seq %d\n", *seqp
);
527 debug("Not found\n");
531 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
538 return -FDT_ERR_NOTFOUND
;
539 chosen_node
= fdt_path_offset(blob
, "/chosen");
540 prop
= fdt_getprop(blob
, chosen_node
, name
, &len
);
542 return -FDT_ERR_NOTFOUND
;
543 return fdt_path_offset(blob
, prop
);
546 int fdtdec_check_fdt(void)
549 * We must have an FDT, but we cannot panic() yet since the console
550 * is not ready. So for now, just assert(). Boards which need an early
551 * FDT (prior to console ready) will need to make their own
552 * arrangements and do their own checks.
554 assert(!fdtdec_prepare_fdt());
559 * This function is a little odd in that it accesses global data. At some
560 * point if the architecture board.c files merge this will make more sense.
561 * Even now, it is common code.
563 int fdtdec_prepare_fdt(void)
565 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
566 fdt_check_header(gd
->fdt_blob
)) {
567 #ifdef CONFIG_SPL_BUILD
568 puts("Missing DTB\n");
570 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");
577 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
582 debug("%s: %s\n", __func__
, prop_name
);
583 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
585 return -FDT_ERR_NOTFOUND
;
587 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
592 * Look up a property in a node and check that it has a minimum length.
594 * @param blob FDT blob
595 * @param node node to examine
596 * @param prop_name name of property to find
597 * @param min_len minimum property length in bytes
598 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
599 found, or -FDT_ERR_BADLAYOUT if not enough data
600 * @return pointer to cell, which is only valid if err == 0
602 static const void *get_prop_check_min_len(const void *blob
, int node
,
603 const char *prop_name
, int min_len
, int *err
)
608 debug("%s: %s\n", __func__
, prop_name
);
609 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
611 *err
= -FDT_ERR_NOTFOUND
;
612 else if (len
< min_len
)
613 *err
= -FDT_ERR_BADLAYOUT
;
619 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
620 u32
*array
, int count
)
625 debug("%s: %s\n", __func__
, prop_name
);
626 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
627 sizeof(u32
) * count
, &err
);
629 for (i
= 0; i
< count
; i
++)
630 array
[i
] = fdt32_to_cpu(cell
[i
]);
635 int fdtdec_get_int_array_count(const void *blob
, int node
,
636 const char *prop_name
, u32
*array
, int count
)
642 debug("%s: %s\n", __func__
, prop_name
);
643 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
645 return -FDT_ERR_NOTFOUND
;
646 elems
= len
/ sizeof(u32
);
649 for (i
= 0; i
< count
; i
++)
650 array
[i
] = fdt32_to_cpu(cell
[i
]);
655 const u32
*fdtdec_locate_array(const void *blob
, int node
,
656 const char *prop_name
, int count
)
661 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
662 sizeof(u32
) * count
, &err
);
663 return err
? NULL
: cell
;
666 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
671 debug("%s: %s\n", __func__
, prop_name
);
672 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
676 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
677 const char *list_name
,
678 const char *cells_name
,
679 int cell_count
, int index
,
680 struct fdtdec_phandle_args
*out_args
)
682 const __be32
*list
, *list_end
;
683 int rc
= 0, size
, cur_index
= 0;
688 /* Retrieve the phandle list property */
689 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
692 list_end
= list
+ size
/ sizeof(*list
);
694 /* Loop over the phandles until all the requested entry is found */
695 while (list
< list_end
) {
700 * If phandle is 0, then it is an empty entry with no
701 * arguments. Skip forward to the next entry.
703 phandle
= be32_to_cpup(list
++);
706 * Find the provider node and parse the #*-cells
707 * property to determine the argument length.
709 * This is not needed if the cell count is hard-coded
710 * (i.e. cells_name not set, but cell_count is set),
711 * except when we're going to return the found node
714 if (cells_name
|| cur_index
== index
) {
715 node
= fdt_node_offset_by_phandle(blob
,
718 debug("%s: could not find phandle\n",
719 fdt_get_name(blob
, src_node
,
726 count
= fdtdec_get_int(blob
, node
, cells_name
,
729 debug("%s: could not get %s for %s\n",
730 fdt_get_name(blob
, src_node
,
733 fdt_get_name(blob
, node
,
742 * Make sure that the arguments actually fit in the
743 * remaining property data length
745 if (list
+ count
> list_end
) {
746 debug("%s: arguments longer than property\n",
747 fdt_get_name(blob
, src_node
, NULL
));
753 * All of the error cases above bail out of the loop, so at
754 * this point, the parsing is successful. If the requested
755 * index matches, then fill the out_args structure and return,
756 * or return -ENOENT for an empty entry.
759 if (cur_index
== index
) {
766 if (count
> MAX_PHANDLE_ARGS
) {
767 debug("%s: too many arguments %d\n",
768 fdt_get_name(blob
, src_node
,
770 count
= MAX_PHANDLE_ARGS
;
772 out_args
->node
= node
;
773 out_args
->args_count
= count
;
774 for (i
= 0; i
< count
; i
++) {
776 be32_to_cpup(list
++);
780 /* Found it! return success */
790 * Result will be one of:
791 * -ENOENT : index is for empty phandle
792 * -EINVAL : parsing error on data
793 * [1..n] : Number of phandle (count mode; when index = -1)
795 rc
= index
< 0 ? cur_index
: -ENOENT
;
800 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
801 u8
*array
, int count
)
806 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
808 memcpy(array
, cell
, count
);
812 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
813 const char *prop_name
, int count
)
818 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
824 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
829 debug("%s: %s\n", __func__
, prop_name
);
830 config_node
= fdt_path_offset(blob
, "/config");
833 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
836 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
841 debug("%s: %s\n", __func__
, prop_name
);
842 config_node
= fdt_path_offset(blob
, "/config");
845 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
850 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
856 debug("%s: %s\n", __func__
, prop_name
);
857 nodeoffset
= fdt_path_offset(blob
, "/config");
861 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
865 return (char *)nodep
;
868 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
869 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
871 const fdt_addr_t
*cell
;
874 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
876 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
877 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
878 debug("cell=%p, len=%d\n", cell
, len
);
882 *basep
= fdt_addr_to_cpu(*cell
);
883 *sizep
= fdt_size_to_cpu(cell
[1]);
884 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
891 * Read a flash entry from the fdt
893 * @param blob FDT blob
894 * @param node Offset of node to read
895 * @param name Name of node being read
896 * @param entry Place to put offset and size of this node
897 * @return 0 if ok, -ve on error
899 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
900 struct fmap_entry
*entry
)
905 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
906 debug("Node '%s' has bad/missing 'reg' property\n", name
);
907 return -FDT_ERR_NOTFOUND
;
909 entry
->offset
= reg
[0];
910 entry
->length
= reg
[1];
911 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
912 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
913 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
914 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
915 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
916 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
917 entry
->hash
= (uint8_t *)prop
;
922 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
927 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
932 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
933 unsigned int index
, struct fdt_resource
*res
)
935 const fdt32_t
*ptr
, *end
;
936 int na
, ns
, len
, parent
;
939 parent
= fdt_parent_offset(fdt
, node
);
943 na
= fdt_address_cells(fdt
, parent
);
944 ns
= fdt_size_cells(fdt
, parent
);
946 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
950 end
= ptr
+ len
/ sizeof(*ptr
);
952 while (ptr
+ na
+ ns
<= end
) {
954 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
955 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
963 return -FDT_ERR_NOTFOUND
;
966 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
967 const char *prop_names
, const char *name
,
968 struct fdt_resource
*res
)
972 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
976 return fdt_get_resource(fdt
, node
, property
, index
, res
);
979 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
980 const char *mem_type
, const char *suffix
,
981 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
985 fdt_size_t size
, offset_size
;
986 fdt_addr_t base
, offset
;
989 if (config_node
== -1) {
990 config_node
= fdt_path_offset(blob
, "/config");
991 if (config_node
< 0) {
992 debug("%s: Cannot find /config node\n", __func__
);
999 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1001 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1003 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1008 node
= fdt_path_offset(blob
, mem
);
1010 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1011 fdt_strerror(node
));
1016 * Not strictly correct - the memory may have multiple banks. We just
1019 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1020 debug("%s: Failed to decode memory region %s\n", __func__
,
1025 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1027 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1029 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1034 *basep
= base
+ offset
;
1035 *sizep
= offset_size
;
1040 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1041 struct timing_entry
*result
)
1043 int length
, ret
= 0;
1046 prop
= fdt_getprop(blob
, node
, name
, &length
);
1048 debug("%s: could not find property %s\n",
1049 fdt_get_name(blob
, node
, NULL
), name
);
1053 if (length
== sizeof(u32
)) {
1054 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1055 result
->min
= result
->typ
;
1056 result
->max
= result
->typ
;
1058 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1064 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1065 struct display_timing
*dt
)
1067 int i
, node
, timings_node
;
1071 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1072 if (timings_node
< 0)
1073 return timings_node
;
1075 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1076 node
> 0 && i
!= index
;
1077 node
= fdt_next_subnode(blob
, node
))
1083 memset(dt
, 0, sizeof(*dt
));
1085 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1087 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1089 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1090 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1091 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1093 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1095 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1096 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1097 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1101 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1103 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1104 DISPLAY_FLAGS_VSYNC_LOW
;
1106 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1108 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1109 DISPLAY_FLAGS_HSYNC_LOW
;
1111 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1113 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1114 DISPLAY_FLAGS_DE_LOW
;
1116 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1118 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1119 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1122 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1123 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1124 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1125 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1126 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1127 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1132 int fdtdec_setup(void)
1134 #ifdef CONFIG_OF_CONTROL
1135 # ifdef CONFIG_OF_EMBED
1136 /* Get a pointer to the FDT */
1137 gd
->fdt_blob
= __dtb_dt_begin
;
1138 # elif defined CONFIG_OF_SEPARATE
1139 # ifdef CONFIG_SPL_BUILD
1140 /* FDT is at end of BSS */
1141 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1143 /* FDT is at end of image */
1144 gd
->fdt_blob
= (ulong
*)&_end
;
1146 # elif defined(CONFIG_OF_HOSTFILE)
1147 if (sandbox_read_fdt_from_file()) {
1148 puts("Failed to read control FDT\n");
1152 # ifndef CONFIG_SPL_BUILD
1153 /* Allow the early environment to override the fdt address */
1154 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1155 (uintptr_t)gd
->fdt_blob
);
1158 return fdtdec_prepare_fdt();
1161 #endif /* !USE_HOSTCC */