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_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_PCIE
, "nvidia,tegra124-pcie"),
39 COMPAT(NVIDIA_TEGRA30_PCIE
, "nvidia,tegra30-pcie"),
40 COMPAT(NVIDIA_TEGRA20_PCIE
, "nvidia,tegra20-pcie"),
41 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL
, "nvidia,tegra124-xusb-padctl"),
42 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL
, "nvidia,tegra210-xusb-padctl"),
43 COMPAT(SMSC_LAN9215
, "smsc,lan9215"),
44 COMPAT(SAMSUNG_EXYNOS5_SROMC
, "samsung,exynos-sromc"),
45 COMPAT(SAMSUNG_S3C2440_I2C
, "samsung,s3c2440-i2c"),
46 COMPAT(SAMSUNG_EXYNOS5_SOUND
, "samsung,exynos-sound"),
47 COMPAT(WOLFSON_WM8994_CODEC
, "wolfson,wm8994-codec"),
48 COMPAT(GOOGLE_CROS_EC_KEYB
, "google,cros-ec-keyb"),
49 COMPAT(SAMSUNG_EXYNOS_USB_PHY
, "samsung,exynos-usb-phy"),
50 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY
, "samsung,exynos5250-usb3-phy"),
51 COMPAT(SAMSUNG_EXYNOS_TMU
, "samsung,exynos-tmu"),
52 COMPAT(SAMSUNG_EXYNOS_FIMD
, "samsung,exynos-fimd"),
53 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI
, "samsung,exynos-mipi-dsi"),
54 COMPAT(SAMSUNG_EXYNOS5_DP
, "samsung,exynos5-dp"),
55 COMPAT(SAMSUNG_EXYNOS_DWMMC
, "samsung,exynos-dwmmc"),
56 COMPAT(SAMSUNG_EXYNOS_MMC
, "samsung,exynos-mmc"),
57 COMPAT(SAMSUNG_EXYNOS_SERIAL
, "samsung,exynos4210-uart"),
58 COMPAT(MAXIM_MAX77686_PMIC
, "maxim,max77686"),
59 COMPAT(GENERIC_SPI_FLASH
, "spi-flash"),
60 COMPAT(MAXIM_98095_CODEC
, "maxim,max98095-codec"),
61 COMPAT(INFINEON_SLB9635_TPM
, "infineon,slb9635-tpm"),
62 COMPAT(INFINEON_SLB9645_TPM
, "infineon,slb9645tt"),
63 COMPAT(SAMSUNG_EXYNOS5_I2C
, "samsung,exynos5-hsi2c"),
64 COMPAT(SANDBOX_LCD_SDL
, "sandbox,lcd-sdl"),
65 COMPAT(COMPAT_NXP_PTN3460
, "nxp,ptn3460"),
66 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
67 COMPAT(PARADE_PS8625
, "parade,ps8625"),
68 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
69 COMPAT(MEMORY_SPD
, "memory-spd"),
70 COMPAT(INTEL_PANTHERPOINT_AHCI
, "intel,pantherpoint-ahci"),
71 COMPAT(INTEL_MODEL_206AX
, "intel,model-206ax"),
72 COMPAT(INTEL_GMA
, "intel,gma"),
73 COMPAT(AMS_AS3722
, "ams,as3722"),
74 COMPAT(INTEL_ICH_SPI
, "intel,ich-spi"),
75 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
76 COMPAT(INTEL_X86_PINCTRL
, "intel,x86-pinctrl"),
77 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
78 COMPAT(COMPAT_INTEL_PCH
, "intel,bd82x6x"),
79 COMPAT(COMPAT_INTEL_IRQ_ROUTER
, "intel,irq-router"),
82 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
84 /* We allow reading of the 'unknown' ID for testing purposes */
85 assert(id
>= 0 && id
< COMPAT_COUNT
);
86 return compat_names
[id
];
89 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
90 const char *prop_name
, fdt_size_t
*sizep
)
92 const fdt32_t
*ptr
, *end
;
93 int parent
, na
, ns
, len
;
96 debug("%s: %s: ", __func__
, prop_name
);
98 parent
= fdt_parent_offset(blob
, node
);
100 debug("(no parent found)\n");
101 return FDT_ADDR_T_NONE
;
104 na
= fdt_address_cells(blob
, parent
);
105 ns
= fdt_size_cells(blob
, parent
);
107 ptr
= fdt_getprop(blob
, node
, prop_name
, &len
);
109 debug("(not found)\n");
110 return FDT_ADDR_T_NONE
;
113 end
= ptr
+ len
/ sizeof(*ptr
);
115 if (ptr
+ na
+ ns
> end
) {
116 debug("(not enough data: expected %d bytes, got %d bytes)\n",
118 return FDT_ADDR_T_NONE
;
121 addr
= fdtdec_get_number(ptr
, na
);
124 *sizep
= fdtdec_get_number(ptr
+ na
, ns
);
125 debug("addr=%pa, size=%pa\n", &addr
, sizep
);
127 debug("%pa\n", &addr
);
133 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
134 const char *prop_name
)
136 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
140 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
141 const char *prop_name
, struct fdt_pci_addr
*addr
)
147 debug("%s: %s: ", __func__
, prop_name
);
150 * If we follow the pci bus bindings strictly, we should check
151 * the value of the node's parent node's #address-cells and
152 * #size-cells. They need to be 3 and 2 accordingly. However,
153 * for simplicity we skip the check here.
155 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
159 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
160 int num
= len
/ FDT_PCI_REG_SIZE
;
163 for (i
= 0; i
< num
; i
++) {
164 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
165 (ulong
)fdt_addr_to_cpu(cell
[0]),
166 (ulong
)fdt_addr_to_cpu(cell
[1]),
167 (ulong
)fdt_addr_to_cpu(cell
[2]));
168 if ((fdt_addr_to_cpu(*cell
) & type
) == type
) {
169 addr
->phys_hi
= fdt_addr_to_cpu(cell
[0]);
170 addr
->phys_mid
= fdt_addr_to_cpu(cell
[1]);
171 addr
->phys_lo
= fdt_addr_to_cpu(cell
[2]);
174 cell
+= (FDT_PCI_ADDR_CELLS
+
190 debug("(not found)\n");
194 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
196 const char *list
, *end
;
199 list
= fdt_getprop(blob
, node
, "compatible", &len
);
208 if (len
>= strlen("pciVVVV,DDDD")) {
209 s
= strstr(list
, "pci");
212 * check if the string is something like pciVVVV,DDDD.RR
213 * or just pciVVVV,DDDD
215 if (s
&& s
[7] == ',' &&
216 (s
[12] == '.' || s
[12] == 0)) {
218 *vendor
= simple_strtol(s
, NULL
, 16);
221 *device
= simple_strtol(s
, NULL
, 16);
233 int fdtdec_get_pci_bdf(const void *blob
, int node
,
234 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
236 u16 dt_vendor
, dt_device
, vendor
, device
;
239 /* get vendor id & device id from the compatible string */
240 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
244 /* extract the bdf from fdt_pci_addr */
245 *bdf
= addr
->phys_hi
& 0xffff00;
247 /* read vendor id & device id based on bdf */
248 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
249 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
252 * Note there are two places in the device tree to fully describe
253 * a pci device: one is via compatible string with a format of
254 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
255 * the device node's reg address property. We read the vendor id
256 * and device id based on bdf and compare the values with the
257 * "VVVV,DDDD". If they are the same, then we are good to use bdf
258 * to read device's bar. But if they are different, we have to rely
259 * on the vendor id and device id extracted from the compatible
260 * string and locate the real bdf by pci_find_device(). This is
261 * because normally we may only know device's device number and
262 * function number when writing device tree. The bus number is
263 * dynamically assigned during the pci enumeration process.
265 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
266 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
274 int fdtdec_get_pci_bar32(const void *blob
, int node
,
275 struct fdt_pci_addr
*addr
, u32
*bar
)
281 /* get pci devices's bdf */
282 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
286 /* extract the bar number from fdt_pci_addr */
287 barnum
= addr
->phys_hi
& 0xff;
288 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
291 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
292 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
298 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
299 uint64_t default_val
)
301 const uint64_t *cell64
;
304 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
305 if (!cell64
|| length
< sizeof(*cell64
))
308 return fdt64_to_cpu(*cell64
);
311 int fdtdec_get_is_enabled(const void *blob
, int node
)
316 * It should say "okay", so only allow that. Some fdts use "ok" but
317 * this is a bug. Please fix your device tree source file. See here
320 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
322 cell
= fdt_getprop(blob
, node
, "status", NULL
);
324 return 0 == strcmp(cell
, "okay");
328 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
330 enum fdt_compat_id id
;
332 /* Search our drivers */
333 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
334 if (0 == fdt_node_check_compatible(blob
, node
,
337 return COMPAT_UNKNOWN
;
340 int fdtdec_next_compatible(const void *blob
, int node
,
341 enum fdt_compat_id id
)
343 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
346 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
347 enum fdt_compat_id id
, int *depthp
)
350 node
= fdt_next_node(blob
, node
, depthp
);
351 } while (*depthp
> 1);
353 /* If this is a direct subnode, and compatible, return it */
354 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
355 blob
, node
, compat_names
[id
]))
358 return -FDT_ERR_NOTFOUND
;
361 int fdtdec_next_alias(const void *blob
, const char *name
,
362 enum fdt_compat_id id
, int *upto
)
364 #define MAX_STR_LEN 20
365 char str
[MAX_STR_LEN
+ 20];
368 /* snprintf() is not available */
369 assert(strlen(name
) < MAX_STR_LEN
);
370 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
371 node
= fdt_path_offset(blob
, str
);
374 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
378 return -FDT_ERR_NOTFOUND
;
383 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
384 enum fdt_compat_id id
, int *node_list
, int maxcount
)
386 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
388 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
391 /* TODO: Can we tighten this code up a little? */
392 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
393 enum fdt_compat_id id
, int *node_list
, int maxcount
)
395 int name_len
= strlen(name
);
403 /* find the alias node if present */
404 alias_node
= fdt_path_offset(blob
, "/aliases");
407 * start with nothing, and we can assume that the root node can't
410 memset(nodes
, '\0', sizeof(nodes
));
412 /* First find all the compatible nodes */
413 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
414 node
= fdtdec_next_compatible(blob
, node
, id
);
416 nodes
[count
++] = node
;
419 debug("%s: warning: maxcount exceeded with alias '%s'\n",
422 /* Now find all the aliases */
423 for (offset
= fdt_first_property_offset(blob
, alias_node
);
425 offset
= fdt_next_property_offset(blob
, offset
)) {
426 const struct fdt_property
*prop
;
432 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
433 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
434 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
435 node
= fdt_path_offset(blob
, prop
->data
);
439 /* Get the alias number */
440 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
441 if (number
< 0 || number
>= maxcount
) {
442 debug("%s: warning: alias '%s' is out of range\n",
447 /* Make sure the node we found is actually in our list! */
449 for (j
= 0; j
< count
; j
++)
450 if (nodes
[j
] == node
) {
456 debug("%s: warning: alias '%s' points to a node "
457 "'%s' that is missing or is not compatible "
458 " with '%s'\n", __func__
, path
,
459 fdt_get_name(blob
, node
, NULL
),
465 * Add this node to our list in the right place, and mark
468 if (fdtdec_get_is_enabled(blob
, node
)) {
469 if (node_list
[number
]) {
470 debug("%s: warning: alias '%s' requires that "
471 "a node be placed in the list in a "
472 "position which is already filled by "
473 "node '%s'\n", __func__
, path
,
474 fdt_get_name(blob
, node
, NULL
));
477 node_list
[number
] = node
;
478 if (number
>= num_found
)
479 num_found
= number
+ 1;
484 /* Add any nodes not mentioned by an alias */
485 for (i
= j
= 0; i
< maxcount
; i
++) {
487 for (; j
< maxcount
; j
++)
489 fdtdec_get_is_enabled(blob
, nodes
[j
]))
492 /* Have we run out of nodes to add? */
496 assert(!node_list
[i
]);
497 node_list
[i
] = nodes
[j
++];
506 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
509 int base_len
= strlen(base
);
510 const char *find_name
;
515 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
516 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
518 aliases
= fdt_path_offset(blob
, "/aliases");
519 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
521 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
527 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
528 debug(" - %s, %s\n", name
, prop
);
529 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
530 strncmp(name
, base
, base_len
))
533 slash
= strrchr(prop
, '/');
534 if (strcmp(slash
+ 1, find_name
))
536 val
= trailing_strtol(name
);
539 debug("Found seq %d\n", *seqp
);
544 debug("Not found\n");
548 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
555 return -FDT_ERR_NOTFOUND
;
556 chosen_node
= fdt_path_offset(blob
, "/chosen");
557 prop
= fdt_getprop(blob
, chosen_node
, name
, &len
);
559 return -FDT_ERR_NOTFOUND
;
560 return fdt_path_offset(blob
, prop
);
563 int fdtdec_check_fdt(void)
566 * We must have an FDT, but we cannot panic() yet since the console
567 * is not ready. So for now, just assert(). Boards which need an early
568 * FDT (prior to console ready) will need to make their own
569 * arrangements and do their own checks.
571 assert(!fdtdec_prepare_fdt());
576 * This function is a little odd in that it accesses global data. At some
577 * point if the architecture board.c files merge this will make more sense.
578 * Even now, it is common code.
580 int fdtdec_prepare_fdt(void)
582 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
583 fdt_check_header(gd
->fdt_blob
)) {
584 #ifdef CONFIG_SPL_BUILD
585 puts("Missing DTB\n");
587 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");
590 printf("fdt_blob=%p\n", gd
->fdt_blob
);
591 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
601 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
606 debug("%s: %s\n", __func__
, prop_name
);
607 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
609 return -FDT_ERR_NOTFOUND
;
611 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
616 * Look up a property in a node and check that it has a minimum length.
618 * @param blob FDT blob
619 * @param node node to examine
620 * @param prop_name name of property to find
621 * @param min_len minimum property length in bytes
622 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
623 found, or -FDT_ERR_BADLAYOUT if not enough data
624 * @return pointer to cell, which is only valid if err == 0
626 static const void *get_prop_check_min_len(const void *blob
, int node
,
627 const char *prop_name
, int min_len
, int *err
)
632 debug("%s: %s\n", __func__
, prop_name
);
633 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
635 *err
= -FDT_ERR_NOTFOUND
;
636 else if (len
< min_len
)
637 *err
= -FDT_ERR_BADLAYOUT
;
643 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
644 u32
*array
, int count
)
649 debug("%s: %s\n", __func__
, prop_name
);
650 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
651 sizeof(u32
) * count
, &err
);
653 for (i
= 0; i
< count
; i
++)
654 array
[i
] = fdt32_to_cpu(cell
[i
]);
659 int fdtdec_get_int_array_count(const void *blob
, int node
,
660 const char *prop_name
, u32
*array
, int count
)
666 debug("%s: %s\n", __func__
, prop_name
);
667 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
669 return -FDT_ERR_NOTFOUND
;
670 elems
= len
/ sizeof(u32
);
673 for (i
= 0; i
< count
; i
++)
674 array
[i
] = fdt32_to_cpu(cell
[i
]);
679 const u32
*fdtdec_locate_array(const void *blob
, int node
,
680 const char *prop_name
, int count
)
685 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
686 sizeof(u32
) * count
, &err
);
687 return err
? NULL
: cell
;
690 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
695 debug("%s: %s\n", __func__
, prop_name
);
696 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
700 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
701 const char *list_name
,
702 const char *cells_name
,
703 int cell_count
, int index
,
704 struct fdtdec_phandle_args
*out_args
)
706 const __be32
*list
, *list_end
;
707 int rc
= 0, size
, cur_index
= 0;
712 /* Retrieve the phandle list property */
713 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
716 list_end
= list
+ size
/ sizeof(*list
);
718 /* Loop over the phandles until all the requested entry is found */
719 while (list
< list_end
) {
724 * If phandle is 0, then it is an empty entry with no
725 * arguments. Skip forward to the next entry.
727 phandle
= be32_to_cpup(list
++);
730 * Find the provider node and parse the #*-cells
731 * property to determine the argument length.
733 * This is not needed if the cell count is hard-coded
734 * (i.e. cells_name not set, but cell_count is set),
735 * except when we're going to return the found node
738 if (cells_name
|| cur_index
== index
) {
739 node
= fdt_node_offset_by_phandle(blob
,
742 debug("%s: could not find phandle\n",
743 fdt_get_name(blob
, src_node
,
750 count
= fdtdec_get_int(blob
, node
, cells_name
,
753 debug("%s: could not get %s for %s\n",
754 fdt_get_name(blob
, src_node
,
757 fdt_get_name(blob
, node
,
766 * Make sure that the arguments actually fit in the
767 * remaining property data length
769 if (list
+ count
> list_end
) {
770 debug("%s: arguments longer than property\n",
771 fdt_get_name(blob
, src_node
, NULL
));
777 * All of the error cases above bail out of the loop, so at
778 * this point, the parsing is successful. If the requested
779 * index matches, then fill the out_args structure and return,
780 * or return -ENOENT for an empty entry.
783 if (cur_index
== index
) {
790 if (count
> MAX_PHANDLE_ARGS
) {
791 debug("%s: too many arguments %d\n",
792 fdt_get_name(blob
, src_node
,
794 count
= MAX_PHANDLE_ARGS
;
796 out_args
->node
= node
;
797 out_args
->args_count
= count
;
798 for (i
= 0; i
< count
; i
++) {
800 be32_to_cpup(list
++);
804 /* Found it! return success */
814 * Result will be one of:
815 * -ENOENT : index is for empty phandle
816 * -EINVAL : parsing error on data
817 * [1..n] : Number of phandle (count mode; when index = -1)
819 rc
= index
< 0 ? cur_index
: -ENOENT
;
824 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
825 u8
*array
, int count
)
830 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
832 memcpy(array
, cell
, count
);
836 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
837 const char *prop_name
, int count
)
842 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
848 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
853 debug("%s: %s\n", __func__
, prop_name
);
854 config_node
= fdt_path_offset(blob
, "/config");
857 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
860 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
865 debug("%s: %s\n", __func__
, prop_name
);
866 config_node
= fdt_path_offset(blob
, "/config");
869 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
874 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
880 debug("%s: %s\n", __func__
, prop_name
);
881 nodeoffset
= fdt_path_offset(blob
, "/config");
885 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
889 return (char *)nodep
;
892 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
893 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
895 const fdt_addr_t
*cell
;
898 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
900 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
901 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
902 debug("cell=%p, len=%d\n", cell
, len
);
906 *basep
= fdt_addr_to_cpu(*cell
);
907 *sizep
= fdt_size_to_cpu(cell
[1]);
908 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
915 * Read a flash entry from the fdt
917 * @param blob FDT blob
918 * @param node Offset of node to read
919 * @param name Name of node being read
920 * @param entry Place to put offset and size of this node
921 * @return 0 if ok, -ve on error
923 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
924 struct fmap_entry
*entry
)
929 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
930 debug("Node '%s' has bad/missing 'reg' property\n", name
);
931 return -FDT_ERR_NOTFOUND
;
933 entry
->offset
= reg
[0];
934 entry
->length
= reg
[1];
935 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
936 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
937 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
938 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
939 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
940 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
941 entry
->hash
= (uint8_t *)prop
;
946 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
951 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
956 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
957 unsigned int index
, struct fdt_resource
*res
)
959 const fdt32_t
*ptr
, *end
;
960 int na
, ns
, len
, parent
;
963 parent
= fdt_parent_offset(fdt
, node
);
967 na
= fdt_address_cells(fdt
, parent
);
968 ns
= fdt_size_cells(fdt
, parent
);
970 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
974 end
= ptr
+ len
/ sizeof(*ptr
);
976 while (ptr
+ na
+ ns
<= end
) {
978 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
979 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
987 return -FDT_ERR_NOTFOUND
;
990 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
991 const char *prop_names
, const char *name
,
992 struct fdt_resource
*res
)
996 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
1000 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1003 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1004 const char *mem_type
, const char *suffix
,
1005 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1009 fdt_size_t size
, offset_size
;
1010 fdt_addr_t base
, offset
;
1013 if (config_node
== -1) {
1014 config_node
= fdt_path_offset(blob
, "/config");
1015 if (config_node
< 0) {
1016 debug("%s: Cannot find /config node\n", __func__
);
1023 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1025 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1027 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1032 node
= fdt_path_offset(blob
, mem
);
1034 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1035 fdt_strerror(node
));
1040 * Not strictly correct - the memory may have multiple banks. We just
1043 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1044 debug("%s: Failed to decode memory region %s\n", __func__
,
1049 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1051 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1053 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1058 *basep
= base
+ offset
;
1059 *sizep
= offset_size
;
1064 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1065 struct timing_entry
*result
)
1067 int length
, ret
= 0;
1070 prop
= fdt_getprop(blob
, node
, name
, &length
);
1072 debug("%s: could not find property %s\n",
1073 fdt_get_name(blob
, node
, NULL
), name
);
1077 if (length
== sizeof(u32
)) {
1078 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1079 result
->min
= result
->typ
;
1080 result
->max
= result
->typ
;
1082 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1088 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1089 struct display_timing
*dt
)
1091 int i
, node
, timings_node
;
1095 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1096 if (timings_node
< 0)
1097 return timings_node
;
1099 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1100 node
> 0 && i
!= index
;
1101 node
= fdt_next_subnode(blob
, node
))
1107 memset(dt
, 0, sizeof(*dt
));
1109 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1111 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1113 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1114 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1115 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1117 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1119 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1120 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1121 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1125 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1127 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1128 DISPLAY_FLAGS_VSYNC_LOW
;
1130 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1132 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1133 DISPLAY_FLAGS_HSYNC_LOW
;
1135 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1137 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1138 DISPLAY_FLAGS_DE_LOW
;
1140 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1142 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1143 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1146 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1147 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1148 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1149 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1150 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1151 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1156 int fdtdec_setup(void)
1158 #ifdef CONFIG_OF_CONTROL
1159 # ifdef CONFIG_OF_EMBED
1160 /* Get a pointer to the FDT */
1161 gd
->fdt_blob
= __dtb_dt_begin
;
1162 # elif defined CONFIG_OF_SEPARATE
1163 # ifdef CONFIG_SPL_BUILD
1164 /* FDT is at end of BSS */
1165 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1167 /* FDT is at end of image */
1168 gd
->fdt_blob
= (ulong
*)&_end
;
1170 # elif defined(CONFIG_OF_HOSTFILE)
1171 if (sandbox_read_fdt_from_file()) {
1172 puts("Failed to read control FDT\n");
1176 # ifndef CONFIG_SPL_BUILD
1177 /* Allow the early environment to override the fdt address */
1178 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1179 (uintptr_t)gd
->fdt_blob
);
1182 return fdtdec_prepare_fdt();
1185 #endif /* !USE_HOSTCC */