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_EMC
, "nvidia,tegra20-emc"),
26 COMPAT(NVIDIA_TEGRA20_EMC_TABLE
, "nvidia,tegra20-emc-table"),
27 COMPAT(NVIDIA_TEGRA20_KBC
, "nvidia,tegra20-kbc"),
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_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"),
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,slb9645tt"),
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(INTEL_X86_PINCTRL
, "intel,x86-pinctrl"),
76 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
77 COMPAT(COMPAT_INTEL_PCH
, "intel,bd82x6x"),
78 COMPAT(COMPAT_INTEL_IRQ_ROUTER
, "intel,irq-router"),
81 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
83 /* We allow reading of the 'unknown' ID for testing purposes */
84 assert(id
>= 0 && id
< COMPAT_COUNT
);
85 return compat_names
[id
];
88 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
89 const char *prop_name
, fdt_size_t
*sizep
)
91 const fdt32_t
*ptr
, *end
;
92 int parent
, na
, ns
, len
;
95 debug("%s: %s: ", __func__
, prop_name
);
97 parent
= fdt_parent_offset(blob
, node
);
99 debug("(no parent found)\n");
100 return FDT_ADDR_T_NONE
;
103 na
= fdt_address_cells(blob
, parent
);
104 ns
= fdt_size_cells(blob
, parent
);
106 ptr
= fdt_getprop(blob
, node
, prop_name
, &len
);
108 debug("(not found)\n");
109 return FDT_ADDR_T_NONE
;
112 end
= ptr
+ len
/ sizeof(*ptr
);
114 if (ptr
+ na
+ ns
> end
) {
115 debug("(not enough data: expected %d bytes, got %d bytes)\n",
117 return FDT_ADDR_T_NONE
;
120 addr
= fdtdec_get_number(ptr
, na
);
123 *sizep
= fdtdec_get_number(ptr
+ na
, ns
);
124 debug("addr=%pa, size=%pa\n", &addr
, sizep
);
126 debug("%pa\n", &addr
);
132 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
133 const char *prop_name
)
135 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
139 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
140 const char *prop_name
, struct fdt_pci_addr
*addr
)
146 debug("%s: %s: ", __func__
, prop_name
);
149 * If we follow the pci bus bindings strictly, we should check
150 * the value of the node's parent node's #address-cells and
151 * #size-cells. They need to be 3 and 2 accordingly. However,
152 * for simplicity we skip the check here.
154 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
158 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
159 int num
= len
/ FDT_PCI_REG_SIZE
;
162 for (i
= 0; i
< num
; i
++) {
163 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
164 (ulong
)fdt_addr_to_cpu(cell
[0]),
165 (ulong
)fdt_addr_to_cpu(cell
[1]),
166 (ulong
)fdt_addr_to_cpu(cell
[2]));
167 if ((fdt_addr_to_cpu(*cell
) & type
) == type
) {
168 addr
->phys_hi
= fdt_addr_to_cpu(cell
[0]);
169 addr
->phys_mid
= fdt_addr_to_cpu(cell
[1]);
170 addr
->phys_lo
= fdt_addr_to_cpu(cell
[2]);
173 cell
+= (FDT_PCI_ADDR_CELLS
+
189 debug("(not found)\n");
193 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
195 const char *list
, *end
;
198 list
= fdt_getprop(blob
, node
, "compatible", &len
);
207 if (len
>= strlen("pciVVVV,DDDD")) {
208 s
= strstr(list
, "pci");
211 * check if the string is something like pciVVVV,DDDD.RR
212 * or just pciVVVV,DDDD
214 if (s
&& s
[7] == ',' &&
215 (s
[12] == '.' || s
[12] == 0)) {
217 *vendor
= simple_strtol(s
, NULL
, 16);
220 *device
= simple_strtol(s
, NULL
, 16);
232 int fdtdec_get_pci_bdf(const void *blob
, int node
,
233 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
235 u16 dt_vendor
, dt_device
, vendor
, device
;
238 /* get vendor id & device id from the compatible string */
239 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
243 /* extract the bdf from fdt_pci_addr */
244 *bdf
= addr
->phys_hi
& 0xffff00;
246 /* read vendor id & device id based on bdf */
247 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
248 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
251 * Note there are two places in the device tree to fully describe
252 * a pci device: one is via compatible string with a format of
253 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
254 * the device node's reg address property. We read the vendor id
255 * and device id based on bdf and compare the values with the
256 * "VVVV,DDDD". If they are the same, then we are good to use bdf
257 * to read device's bar. But if they are different, we have to rely
258 * on the vendor id and device id extracted from the compatible
259 * string and locate the real bdf by pci_find_device(). This is
260 * because normally we may only know device's device number and
261 * function number when writing device tree. The bus number is
262 * dynamically assigned during the pci enumeration process.
264 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
265 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
273 int fdtdec_get_pci_bar32(const void *blob
, int node
,
274 struct fdt_pci_addr
*addr
, u32
*bar
)
280 /* get pci devices's bdf */
281 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
285 /* extract the bar number from fdt_pci_addr */
286 barnum
= addr
->phys_hi
& 0xff;
287 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
290 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
291 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
297 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
298 uint64_t default_val
)
300 const uint64_t *cell64
;
303 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
304 if (!cell64
|| length
< sizeof(*cell64
))
307 return fdt64_to_cpu(*cell64
);
310 int fdtdec_get_is_enabled(const void *blob
, int node
)
315 * It should say "okay", so only allow that. Some fdts use "ok" but
316 * this is a bug. Please fix your device tree source file. See here
319 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
321 cell
= fdt_getprop(blob
, node
, "status", NULL
);
323 return 0 == strcmp(cell
, "okay");
327 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
329 enum fdt_compat_id id
;
331 /* Search our drivers */
332 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
333 if (0 == fdt_node_check_compatible(blob
, node
,
336 return COMPAT_UNKNOWN
;
339 int fdtdec_next_compatible(const void *blob
, int node
,
340 enum fdt_compat_id id
)
342 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
345 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
346 enum fdt_compat_id id
, int *depthp
)
349 node
= fdt_next_node(blob
, node
, depthp
);
350 } while (*depthp
> 1);
352 /* If this is a direct subnode, and compatible, return it */
353 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
354 blob
, node
, compat_names
[id
]))
357 return -FDT_ERR_NOTFOUND
;
360 int fdtdec_next_alias(const void *blob
, const char *name
,
361 enum fdt_compat_id id
, int *upto
)
363 #define MAX_STR_LEN 20
364 char str
[MAX_STR_LEN
+ 20];
367 /* snprintf() is not available */
368 assert(strlen(name
) < MAX_STR_LEN
);
369 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
370 node
= fdt_path_offset(blob
, str
);
373 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
377 return -FDT_ERR_NOTFOUND
;
382 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
383 enum fdt_compat_id id
, int *node_list
, int maxcount
)
385 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
387 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
390 /* TODO: Can we tighten this code up a little? */
391 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
392 enum fdt_compat_id id
, int *node_list
, int maxcount
)
394 int name_len
= strlen(name
);
402 /* find the alias node if present */
403 alias_node
= fdt_path_offset(blob
, "/aliases");
406 * start with nothing, and we can assume that the root node can't
409 memset(nodes
, '\0', sizeof(nodes
));
411 /* First find all the compatible nodes */
412 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
413 node
= fdtdec_next_compatible(blob
, node
, id
);
415 nodes
[count
++] = node
;
418 debug("%s: warning: maxcount exceeded with alias '%s'\n",
421 /* Now find all the aliases */
422 for (offset
= fdt_first_property_offset(blob
, alias_node
);
424 offset
= fdt_next_property_offset(blob
, offset
)) {
425 const struct fdt_property
*prop
;
431 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
432 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
433 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
434 node
= fdt_path_offset(blob
, prop
->data
);
438 /* Get the alias number */
439 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
440 if (number
< 0 || number
>= maxcount
) {
441 debug("%s: warning: alias '%s' is out of range\n",
446 /* Make sure the node we found is actually in our list! */
448 for (j
= 0; j
< count
; j
++)
449 if (nodes
[j
] == node
) {
455 debug("%s: warning: alias '%s' points to a node "
456 "'%s' that is missing or is not compatible "
457 " with '%s'\n", __func__
, path
,
458 fdt_get_name(blob
, node
, NULL
),
464 * Add this node to our list in the right place, and mark
467 if (fdtdec_get_is_enabled(blob
, node
)) {
468 if (node_list
[number
]) {
469 debug("%s: warning: alias '%s' requires that "
470 "a node be placed in the list in a "
471 "position which is already filled by "
472 "node '%s'\n", __func__
, path
,
473 fdt_get_name(blob
, node
, NULL
));
476 node_list
[number
] = node
;
477 if (number
>= num_found
)
478 num_found
= number
+ 1;
483 /* Add any nodes not mentioned by an alias */
484 for (i
= j
= 0; i
< maxcount
; i
++) {
486 for (; j
< maxcount
; j
++)
488 fdtdec_get_is_enabled(blob
, nodes
[j
]))
491 /* Have we run out of nodes to add? */
495 assert(!node_list
[i
]);
496 node_list
[i
] = nodes
[j
++];
505 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
508 int base_len
= strlen(base
);
509 const char *find_name
;
514 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
515 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
517 aliases
= fdt_path_offset(blob
, "/aliases");
518 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
520 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
526 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
527 debug(" - %s, %s\n", name
, prop
);
528 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
529 strncmp(name
, base
, base_len
))
532 slash
= strrchr(prop
, '/');
533 if (strcmp(slash
+ 1, find_name
))
535 val
= trailing_strtol(name
);
538 debug("Found seq %d\n", *seqp
);
543 debug("Not found\n");
547 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
554 return -FDT_ERR_NOTFOUND
;
555 chosen_node
= fdt_path_offset(blob
, "/chosen");
556 prop
= fdt_getprop(blob
, chosen_node
, name
, &len
);
558 return -FDT_ERR_NOTFOUND
;
559 return fdt_path_offset(blob
, prop
);
562 int fdtdec_check_fdt(void)
565 * We must have an FDT, but we cannot panic() yet since the console
566 * is not ready. So for now, just assert(). Boards which need an early
567 * FDT (prior to console ready) will need to make their own
568 * arrangements and do their own checks.
570 assert(!fdtdec_prepare_fdt());
575 * This function is a little odd in that it accesses global data. At some
576 * point if the architecture board.c files merge this will make more sense.
577 * Even now, it is common code.
579 int fdtdec_prepare_fdt(void)
581 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
582 fdt_check_header(gd
->fdt_blob
)) {
583 #ifdef CONFIG_SPL_BUILD
584 puts("Missing DTB\n");
586 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");
589 printf("fdt_blob=%p\n", gd
->fdt_blob
);
590 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
600 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
605 debug("%s: %s\n", __func__
, prop_name
);
606 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
608 return -FDT_ERR_NOTFOUND
;
610 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
615 * Look up a property in a node and check that it has a minimum length.
617 * @param blob FDT blob
618 * @param node node to examine
619 * @param prop_name name of property to find
620 * @param min_len minimum property length in bytes
621 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
622 found, or -FDT_ERR_BADLAYOUT if not enough data
623 * @return pointer to cell, which is only valid if err == 0
625 static const void *get_prop_check_min_len(const void *blob
, int node
,
626 const char *prop_name
, int min_len
, int *err
)
631 debug("%s: %s\n", __func__
, prop_name
);
632 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
634 *err
= -FDT_ERR_NOTFOUND
;
635 else if (len
< min_len
)
636 *err
= -FDT_ERR_BADLAYOUT
;
642 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
643 u32
*array
, int count
)
648 debug("%s: %s\n", __func__
, prop_name
);
649 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
650 sizeof(u32
) * count
, &err
);
652 for (i
= 0; i
< count
; i
++)
653 array
[i
] = fdt32_to_cpu(cell
[i
]);
658 int fdtdec_get_int_array_count(const void *blob
, int node
,
659 const char *prop_name
, u32
*array
, int count
)
665 debug("%s: %s\n", __func__
, prop_name
);
666 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
668 return -FDT_ERR_NOTFOUND
;
669 elems
= len
/ sizeof(u32
);
672 for (i
= 0; i
< count
; i
++)
673 array
[i
] = fdt32_to_cpu(cell
[i
]);
678 const u32
*fdtdec_locate_array(const void *blob
, int node
,
679 const char *prop_name
, int count
)
684 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
685 sizeof(u32
) * count
, &err
);
686 return err
? NULL
: cell
;
689 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
694 debug("%s: %s\n", __func__
, prop_name
);
695 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
699 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
700 const char *list_name
,
701 const char *cells_name
,
702 int cell_count
, int index
,
703 struct fdtdec_phandle_args
*out_args
)
705 const __be32
*list
, *list_end
;
706 int rc
= 0, size
, cur_index
= 0;
711 /* Retrieve the phandle list property */
712 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
715 list_end
= list
+ size
/ sizeof(*list
);
717 /* Loop over the phandles until all the requested entry is found */
718 while (list
< list_end
) {
723 * If phandle is 0, then it is an empty entry with no
724 * arguments. Skip forward to the next entry.
726 phandle
= be32_to_cpup(list
++);
729 * Find the provider node and parse the #*-cells
730 * property to determine the argument length.
732 * This is not needed if the cell count is hard-coded
733 * (i.e. cells_name not set, but cell_count is set),
734 * except when we're going to return the found node
737 if (cells_name
|| cur_index
== index
) {
738 node
= fdt_node_offset_by_phandle(blob
,
741 debug("%s: could not find phandle\n",
742 fdt_get_name(blob
, src_node
,
749 count
= fdtdec_get_int(blob
, node
, cells_name
,
752 debug("%s: could not get %s for %s\n",
753 fdt_get_name(blob
, src_node
,
756 fdt_get_name(blob
, node
,
765 * Make sure that the arguments actually fit in the
766 * remaining property data length
768 if (list
+ count
> list_end
) {
769 debug("%s: arguments longer than property\n",
770 fdt_get_name(blob
, src_node
, NULL
));
776 * All of the error cases above bail out of the loop, so at
777 * this point, the parsing is successful. If the requested
778 * index matches, then fill the out_args structure and return,
779 * or return -ENOENT for an empty entry.
782 if (cur_index
== index
) {
789 if (count
> MAX_PHANDLE_ARGS
) {
790 debug("%s: too many arguments %d\n",
791 fdt_get_name(blob
, src_node
,
793 count
= MAX_PHANDLE_ARGS
;
795 out_args
->node
= node
;
796 out_args
->args_count
= count
;
797 for (i
= 0; i
< count
; i
++) {
799 be32_to_cpup(list
++);
803 /* Found it! return success */
813 * Result will be one of:
814 * -ENOENT : index is for empty phandle
815 * -EINVAL : parsing error on data
816 * [1..n] : Number of phandle (count mode; when index = -1)
818 rc
= index
< 0 ? cur_index
: -ENOENT
;
823 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
824 u8
*array
, int count
)
829 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
831 memcpy(array
, cell
, count
);
835 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
836 const char *prop_name
, int count
)
841 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
847 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
852 debug("%s: %s\n", __func__
, prop_name
);
853 config_node
= fdt_path_offset(blob
, "/config");
856 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
859 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
864 debug("%s: %s\n", __func__
, prop_name
);
865 config_node
= fdt_path_offset(blob
, "/config");
868 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
873 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
879 debug("%s: %s\n", __func__
, prop_name
);
880 nodeoffset
= fdt_path_offset(blob
, "/config");
884 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
888 return (char *)nodep
;
891 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
892 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
894 const fdt_addr_t
*cell
;
897 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
899 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
900 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
901 debug("cell=%p, len=%d\n", cell
, len
);
905 *basep
= fdt_addr_to_cpu(*cell
);
906 *sizep
= fdt_size_to_cpu(cell
[1]);
907 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
914 * Read a flash entry from the fdt
916 * @param blob FDT blob
917 * @param node Offset of node to read
918 * @param name Name of node being read
919 * @param entry Place to put offset and size of this node
920 * @return 0 if ok, -ve on error
922 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
923 struct fmap_entry
*entry
)
928 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
929 debug("Node '%s' has bad/missing 'reg' property\n", name
);
930 return -FDT_ERR_NOTFOUND
;
932 entry
->offset
= reg
[0];
933 entry
->length
= reg
[1];
934 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
935 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
936 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
937 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
938 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
939 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
940 entry
->hash
= (uint8_t *)prop
;
945 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
950 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
955 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
956 unsigned int index
, struct fdt_resource
*res
)
958 const fdt32_t
*ptr
, *end
;
959 int na
, ns
, len
, parent
;
962 parent
= fdt_parent_offset(fdt
, node
);
966 na
= fdt_address_cells(fdt
, parent
);
967 ns
= fdt_size_cells(fdt
, parent
);
969 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
973 end
= ptr
+ len
/ sizeof(*ptr
);
975 while (ptr
+ na
+ ns
<= end
) {
977 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
978 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
986 return -FDT_ERR_NOTFOUND
;
989 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
990 const char *prop_names
, const char *name
,
991 struct fdt_resource
*res
)
995 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
999 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1002 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1003 const char *mem_type
, const char *suffix
,
1004 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1008 fdt_size_t size
, offset_size
;
1009 fdt_addr_t base
, offset
;
1012 if (config_node
== -1) {
1013 config_node
= fdt_path_offset(blob
, "/config");
1014 if (config_node
< 0) {
1015 debug("%s: Cannot find /config node\n", __func__
);
1022 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1024 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1026 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1031 node
= fdt_path_offset(blob
, mem
);
1033 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1034 fdt_strerror(node
));
1039 * Not strictly correct - the memory may have multiple banks. We just
1042 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1043 debug("%s: Failed to decode memory region %s\n", __func__
,
1048 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1050 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1052 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1057 *basep
= base
+ offset
;
1058 *sizep
= offset_size
;
1063 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1064 struct timing_entry
*result
)
1066 int length
, ret
= 0;
1069 prop
= fdt_getprop(blob
, node
, name
, &length
);
1071 debug("%s: could not find property %s\n",
1072 fdt_get_name(blob
, node
, NULL
), name
);
1076 if (length
== sizeof(u32
)) {
1077 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1078 result
->min
= result
->typ
;
1079 result
->max
= result
->typ
;
1081 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1087 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1088 struct display_timing
*dt
)
1090 int i
, node
, timings_node
;
1094 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1095 if (timings_node
< 0)
1096 return timings_node
;
1098 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1099 node
> 0 && i
!= index
;
1100 node
= fdt_next_subnode(blob
, node
))
1106 memset(dt
, 0, sizeof(*dt
));
1108 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1110 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1112 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1113 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1114 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1116 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1118 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1119 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1120 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1124 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1126 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1127 DISPLAY_FLAGS_VSYNC_LOW
;
1129 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1131 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1132 DISPLAY_FLAGS_HSYNC_LOW
;
1134 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1136 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1137 DISPLAY_FLAGS_DE_LOW
;
1139 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1141 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1142 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1145 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1146 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1147 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1148 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1149 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1150 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1155 int fdtdec_setup(void)
1157 #ifdef CONFIG_OF_CONTROL
1158 # ifdef CONFIG_OF_EMBED
1159 /* Get a pointer to the FDT */
1160 gd
->fdt_blob
= __dtb_dt_begin
;
1161 # elif defined CONFIG_OF_SEPARATE
1162 # ifdef CONFIG_SPL_BUILD
1163 /* FDT is at end of BSS */
1164 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1166 /* FDT is at end of image */
1167 gd
->fdt_blob
= (ulong
*)&_end
;
1169 # elif defined(CONFIG_OF_HOSTFILE)
1170 if (sandbox_read_fdt_from_file()) {
1171 puts("Failed to read control FDT\n");
1175 # ifndef CONFIG_SPL_BUILD
1176 /* Allow the early environment to override the fdt address */
1177 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1178 (uintptr_t)gd
->fdt_blob
);
1181 return fdtdec_prepare_fdt();
1184 #endif /* !USE_HOSTCC */