2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <linux/ctype.h>
14 DECLARE_GLOBAL_DATA_PTR
;
17 * Here are the type we know about. One day we might allow drivers to
18 * register. For now we just put them here. The COMPAT macro allows us to
19 * turn this into a sparse list later, and keeps the ID with the name.
21 #define COMPAT(id, name) name
22 static const char * const compat_names
[COMPAT_COUNT
] = {
23 COMPAT(UNKNOWN
, "<none>"),
24 COMPAT(NVIDIA_TEGRA20_USB
, "nvidia,tegra20-ehci"),
25 COMPAT(NVIDIA_TEGRA30_USB
, "nvidia,tegra30-ehci"),
26 COMPAT(NVIDIA_TEGRA114_USB
, "nvidia,tegra114-ehci"),
27 COMPAT(NVIDIA_TEGRA20_EMC
, "nvidia,tegra20-emc"),
28 COMPAT(NVIDIA_TEGRA20_EMC_TABLE
, "nvidia,tegra20-emc-table"),
29 COMPAT(NVIDIA_TEGRA20_KBC
, "nvidia,tegra20-kbc"),
30 COMPAT(NVIDIA_TEGRA20_NAND
, "nvidia,tegra20-nand"),
31 COMPAT(NVIDIA_TEGRA20_PWM
, "nvidia,tegra20-pwm"),
32 COMPAT(NVIDIA_TEGRA20_DC
, "nvidia,tegra20-dc"),
33 COMPAT(NVIDIA_TEGRA124_SDMMC
, "nvidia,tegra124-sdhci"),
34 COMPAT(NVIDIA_TEGRA30_SDMMC
, "nvidia,tegra30-sdhci"),
35 COMPAT(NVIDIA_TEGRA20_SDMMC
, "nvidia,tegra20-sdhci"),
36 COMPAT(NVIDIA_TEGRA124_PCIE
, "nvidia,tegra124-pcie"),
37 COMPAT(NVIDIA_TEGRA30_PCIE
, "nvidia,tegra30-pcie"),
38 COMPAT(NVIDIA_TEGRA20_PCIE
, "nvidia,tegra20-pcie"),
39 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL
, "nvidia,tegra124-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
, "google,cros-ec"),
46 COMPAT(GOOGLE_CROS_EC_KEYB
, "google,cros-ec-keyb"),
47 COMPAT(SAMSUNG_EXYNOS_EHCI
, "samsung,exynos-ehci"),
48 COMPAT(SAMSUNG_EXYNOS5_XHCI
, "samsung,exynos5250-xhci"),
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_pmic"),
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,slb9645-tpm"),
63 COMPAT(SAMSUNG_EXYNOS5_I2C
, "samsung,exynos5-hsi2c"),
64 COMPAT(SANDBOX_HOST_EMULATION
, "sandbox,host-emulation"),
65 COMPAT(SANDBOX_LCD_SDL
, "sandbox,lcd-sdl"),
66 COMPAT(TI_TPS65090
, "ti,tps65090"),
67 COMPAT(COMPAT_NXP_PTN3460
, "nxp,ptn3460"),
68 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
69 COMPAT(PARADE_PS8625
, "parade,ps8625"),
70 COMPAT(COMPAT_INTEL_LPC
, "intel,lpc"),
71 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
72 COMPAT(MEMORY_SPD
, "memory-spd"),
73 COMPAT(INTEL_PANTHERPOINT_AHCI
, "intel,pantherpoint-ahci"),
74 COMPAT(INTEL_MODEL_206AX
, "intel,model-206ax"),
75 COMPAT(INTEL_GMA
, "intel,gma"),
76 COMPAT(AMS_AS3722
, "ams,as3722"),
77 COMPAT(INTEL_ICH_SPI
, "intel,ich-spi"),
78 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
79 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
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 fdt_addr_t
*cell
;
95 debug("%s: %s: ", __func__
, prop_name
);
96 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
97 if (cell
&& ((!sizep
&& len
== sizeof(fdt_addr_t
)) ||
98 len
== sizeof(fdt_addr_t
) * 2)) {
99 fdt_addr_t addr
= fdt_addr_to_cpu(*cell
);
101 const fdt_size_t
*size
;
103 size
= (fdt_size_t
*)((char *)cell
+
105 *sizep
= fdt_size_to_cpu(*size
);
106 debug("addr=%08lx, size=%08x\n",
107 (ulong
)addr
, *sizep
);
109 debug("%08lx\n", (ulong
)addr
);
113 debug("(not found)\n");
114 return FDT_ADDR_T_NONE
;
117 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
118 const char *prop_name
)
120 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
124 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
125 const char *prop_name
, struct fdt_pci_addr
*addr
)
131 debug("%s: %s: ", __func__
, prop_name
);
134 * If we follow the pci bus bindings strictly, we should check
135 * the value of the node's parent node's #address-cells and
136 * #size-cells. They need to be 3 and 2 accordingly. However,
137 * for simplicity we skip the check here.
139 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
143 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
144 int num
= len
/ FDT_PCI_REG_SIZE
;
147 for (i
= 0; i
< num
; i
++) {
148 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
149 (ulong
)fdt_addr_to_cpu(cell
[0]),
150 (ulong
)fdt_addr_to_cpu(cell
[1]),
151 (ulong
)fdt_addr_to_cpu(cell
[2]));
152 if ((fdt_addr_to_cpu(*cell
) & type
) == type
) {
153 addr
->phys_hi
= fdt_addr_to_cpu(cell
[0]);
154 addr
->phys_mid
= fdt_addr_to_cpu(cell
[1]);
155 addr
->phys_lo
= fdt_addr_to_cpu(cell
[2]);
158 cell
+= (FDT_PCI_ADDR_CELLS
+
172 debug("(not found)\n");
176 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
178 const char *list
, *end
;
181 list
= fdt_getprop(blob
, node
, "compatible", &len
);
190 if (len
>= strlen("pciVVVV,DDDD")) {
191 s
= strstr(list
, "pci");
194 * check if the string is something like pciVVVV,DDDD.RR
195 * or just pciVVVV,DDDD
197 if (s
&& s
[7] == ',' &&
198 (s
[12] == '.' || s
[12] == 0)) {
200 *vendor
= simple_strtol(s
, NULL
, 16);
203 *device
= simple_strtol(s
, NULL
, 16);
215 int fdtdec_get_pci_bdf(const void *blob
, int node
,
216 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
218 u16 dt_vendor
, dt_device
, vendor
, device
;
221 /* get vendor id & device id from the compatible string */
222 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
226 /* extract the bdf from fdt_pci_addr */
227 *bdf
= addr
->phys_hi
& 0xffff00;
229 /* read vendor id & device id based on bdf */
230 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
231 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
234 * Note there are two places in the device tree to fully describe
235 * a pci device: one is via compatible string with a format of
236 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
237 * the device node's reg address property. We read the vendor id
238 * and device id based on bdf and compare the values with the
239 * "VVVV,DDDD". If they are the same, then we are good to use bdf
240 * to read device's bar. But if they are different, we have to rely
241 * on the vendor id and device id extracted from the compatible
242 * string and locate the real bdf by pci_find_device(). This is
243 * because normally we may only know device's device number and
244 * function number when writing device tree. The bus number is
245 * dynamically assigned during the pci enumeration process.
247 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
248 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
256 int fdtdec_get_pci_bar32(const void *blob
, int node
,
257 struct fdt_pci_addr
*addr
, u32
*bar
)
263 /* get pci devices's bdf */
264 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
268 /* extract the bar number from fdt_pci_addr */
269 barnum
= addr
->phys_hi
& 0xff;
270 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
273 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
274 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
280 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
281 uint64_t default_val
)
283 const uint64_t *cell64
;
286 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
287 if (!cell64
|| length
< sizeof(*cell64
))
290 return fdt64_to_cpu(*cell64
);
293 int fdtdec_get_is_enabled(const void *blob
, int node
)
298 * It should say "okay", so only allow that. Some fdts use "ok" but
299 * this is a bug. Please fix your device tree source file. See here
302 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
304 cell
= fdt_getprop(blob
, node
, "status", NULL
);
306 return 0 == strcmp(cell
, "okay");
310 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
312 enum fdt_compat_id id
;
314 /* Search our drivers */
315 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
316 if (0 == fdt_node_check_compatible(blob
, node
,
319 return COMPAT_UNKNOWN
;
322 int fdtdec_next_compatible(const void *blob
, int node
,
323 enum fdt_compat_id id
)
325 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
328 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
329 enum fdt_compat_id id
, int *depthp
)
332 node
= fdt_next_node(blob
, node
, depthp
);
333 } while (*depthp
> 1);
335 /* If this is a direct subnode, and compatible, return it */
336 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
337 blob
, node
, compat_names
[id
]))
340 return -FDT_ERR_NOTFOUND
;
343 int fdtdec_next_alias(const void *blob
, const char *name
,
344 enum fdt_compat_id id
, int *upto
)
346 #define MAX_STR_LEN 20
347 char str
[MAX_STR_LEN
+ 20];
350 /* snprintf() is not available */
351 assert(strlen(name
) < MAX_STR_LEN
);
352 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
353 node
= fdt_path_offset(blob
, str
);
356 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
360 return -FDT_ERR_NOTFOUND
;
365 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
366 enum fdt_compat_id id
, int *node_list
, int maxcount
)
368 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
370 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
373 /* TODO: Can we tighten this code up a little? */
374 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
375 enum fdt_compat_id id
, int *node_list
, int maxcount
)
377 int name_len
= strlen(name
);
385 /* find the alias node if present */
386 alias_node
= fdt_path_offset(blob
, "/aliases");
389 * start with nothing, and we can assume that the root node can't
392 memset(nodes
, '\0', sizeof(nodes
));
394 /* First find all the compatible nodes */
395 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
396 node
= fdtdec_next_compatible(blob
, node
, id
);
398 nodes
[count
++] = node
;
401 debug("%s: warning: maxcount exceeded with alias '%s'\n",
404 /* Now find all the aliases */
405 for (offset
= fdt_first_property_offset(blob
, alias_node
);
407 offset
= fdt_next_property_offset(blob
, offset
)) {
408 const struct fdt_property
*prop
;
414 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
415 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
416 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
417 node
= fdt_path_offset(blob
, prop
->data
);
421 /* Get the alias number */
422 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
423 if (number
< 0 || number
>= maxcount
) {
424 debug("%s: warning: alias '%s' is out of range\n",
429 /* Make sure the node we found is actually in our list! */
431 for (j
= 0; j
< count
; j
++)
432 if (nodes
[j
] == node
) {
438 debug("%s: warning: alias '%s' points to a node "
439 "'%s' that is missing or is not compatible "
440 " with '%s'\n", __func__
, path
,
441 fdt_get_name(blob
, node
, NULL
),
447 * Add this node to our list in the right place, and mark
450 if (fdtdec_get_is_enabled(blob
, node
)) {
451 if (node_list
[number
]) {
452 debug("%s: warning: alias '%s' requires that "
453 "a node be placed in the list in a "
454 "position which is already filled by "
455 "node '%s'\n", __func__
, path
,
456 fdt_get_name(blob
, node
, NULL
));
459 node_list
[number
] = node
;
460 if (number
>= num_found
)
461 num_found
= number
+ 1;
466 /* Add any nodes not mentioned by an alias */
467 for (i
= j
= 0; i
< maxcount
; i
++) {
469 for (; j
< maxcount
; j
++)
471 fdtdec_get_is_enabled(blob
, nodes
[j
]))
474 /* Have we run out of nodes to add? */
478 assert(!node_list
[i
]);
479 node_list
[i
] = nodes
[j
++];
488 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
491 int base_len
= strlen(base
);
492 const char *find_name
;
497 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
498 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
500 aliases
= fdt_path_offset(blob
, "/aliases");
501 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
503 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
510 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
511 debug(" - %s, %s\n", name
, prop
);
512 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
513 strncmp(name
, base
, base_len
))
516 slash
= strrchr(prop
, '/');
517 if (strcmp(slash
+ 1, find_name
))
519 for (p
= name
+ strlen(name
) - 1; p
> name
; p
--) {
521 *seqp
= simple_strtoul(p
+ 1, NULL
, 10);
522 debug("Found seq %d\n", *seqp
);
528 debug("Not found\n");
532 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
539 return -FDT_ERR_NOTFOUND
;
540 chosen_node
= fdt_path_offset(blob
, "/chosen");
541 prop
= fdt_getprop(blob
, chosen_node
, name
, &len
);
543 return -FDT_ERR_NOTFOUND
;
544 return fdt_path_offset(blob
, prop
);
547 int fdtdec_check_fdt(void)
550 * We must have an FDT, but we cannot panic() yet since the console
551 * is not ready. So for now, just assert(). Boards which need an early
552 * FDT (prior to console ready) will need to make their own
553 * arrangements and do their own checks.
555 assert(!fdtdec_prepare_fdt());
560 * This function is a little odd in that it accesses global data. At some
561 * point if the architecture board.c files merge this will make more sense.
562 * Even now, it is common code.
564 int fdtdec_prepare_fdt(void)
566 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
567 fdt_check_header(gd
->fdt_blob
)) {
568 printf("No valid FDT found - please append one to U-Boot "
569 "binary, use u-boot-dtb.bin or define "
570 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
576 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
581 debug("%s: %s\n", __func__
, prop_name
);
582 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
584 return -FDT_ERR_NOTFOUND
;
586 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
591 * Look up a property in a node and check that it has a minimum length.
593 * @param blob FDT blob
594 * @param node node to examine
595 * @param prop_name name of property to find
596 * @param min_len minimum property length in bytes
597 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
598 found, or -FDT_ERR_BADLAYOUT if not enough data
599 * @return pointer to cell, which is only valid if err == 0
601 static const void *get_prop_check_min_len(const void *blob
, int node
,
602 const char *prop_name
, int min_len
, int *err
)
607 debug("%s: %s\n", __func__
, prop_name
);
608 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
610 *err
= -FDT_ERR_NOTFOUND
;
611 else if (len
< min_len
)
612 *err
= -FDT_ERR_BADLAYOUT
;
618 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
619 u32
*array
, int count
)
624 debug("%s: %s\n", __func__
, prop_name
);
625 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
626 sizeof(u32
) * count
, &err
);
628 for (i
= 0; i
< count
; i
++)
629 array
[i
] = fdt32_to_cpu(cell
[i
]);
634 int fdtdec_get_int_array_count(const void *blob
, int node
,
635 const char *prop_name
, u32
*array
, int count
)
641 debug("%s: %s\n", __func__
, prop_name
);
642 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
644 return -FDT_ERR_NOTFOUND
;
645 elems
= len
/ sizeof(u32
);
648 for (i
= 0; i
< count
; i
++)
649 array
[i
] = fdt32_to_cpu(cell
[i
]);
654 const u32
*fdtdec_locate_array(const void *blob
, int node
,
655 const char *prop_name
, int count
)
660 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
661 sizeof(u32
) * count
, &err
);
662 return err
? NULL
: cell
;
665 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
670 debug("%s: %s\n", __func__
, prop_name
);
671 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
675 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
676 const char *list_name
,
677 const char *cells_name
,
678 int cell_count
, int index
,
679 struct fdtdec_phandle_args
*out_args
)
681 const __be32
*list
, *list_end
;
682 int rc
= 0, size
, cur_index
= 0;
687 /* Retrieve the phandle list property */
688 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
691 list_end
= list
+ size
/ sizeof(*list
);
693 /* Loop over the phandles until all the requested entry is found */
694 while (list
< list_end
) {
699 * If phandle is 0, then it is an empty entry with no
700 * arguments. Skip forward to the next entry.
702 phandle
= be32_to_cpup(list
++);
705 * Find the provider node and parse the #*-cells
706 * property to determine the argument length.
708 * This is not needed if the cell count is hard-coded
709 * (i.e. cells_name not set, but cell_count is set),
710 * except when we're going to return the found node
713 if (cells_name
|| cur_index
== index
) {
714 node
= fdt_node_offset_by_phandle(blob
,
717 debug("%s: could not find phandle\n",
718 fdt_get_name(blob
, src_node
,
725 count
= fdtdec_get_int(blob
, node
, cells_name
,
728 debug("%s: could not get %s for %s\n",
729 fdt_get_name(blob
, src_node
,
732 fdt_get_name(blob
, node
,
741 * Make sure that the arguments actually fit in the
742 * remaining property data length
744 if (list
+ count
> list_end
) {
745 debug("%s: arguments longer than property\n",
746 fdt_get_name(blob
, src_node
, NULL
));
752 * All of the error cases above bail out of the loop, so at
753 * this point, the parsing is successful. If the requested
754 * index matches, then fill the out_args structure and return,
755 * or return -ENOENT for an empty entry.
758 if (cur_index
== index
) {
765 if (count
> MAX_PHANDLE_ARGS
) {
766 debug("%s: too many arguments %d\n",
767 fdt_get_name(blob
, src_node
,
769 count
= MAX_PHANDLE_ARGS
;
771 out_args
->node
= node
;
772 out_args
->args_count
= count
;
773 for (i
= 0; i
< count
; i
++) {
775 be32_to_cpup(list
++);
779 /* Found it! return success */
789 * Result will be one of:
790 * -ENOENT : index is for empty phandle
791 * -EINVAL : parsing error on data
792 * [1..n] : Number of phandle (count mode; when index = -1)
794 rc
= index
< 0 ? cur_index
: -ENOENT
;
799 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
800 u8
*array
, int count
)
805 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
807 memcpy(array
, cell
, count
);
811 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
812 const char *prop_name
, int count
)
817 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
823 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
828 debug("%s: %s\n", __func__
, prop_name
);
829 config_node
= fdt_path_offset(blob
, "/config");
832 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
835 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
840 debug("%s: %s\n", __func__
, prop_name
);
841 config_node
= fdt_path_offset(blob
, "/config");
844 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
849 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
855 debug("%s: %s\n", __func__
, prop_name
);
856 nodeoffset
= fdt_path_offset(blob
, "/config");
860 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
864 return (char *)nodep
;
867 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
868 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
870 const fdt_addr_t
*cell
;
873 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
875 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
876 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
877 debug("cell=%p, len=%d\n", cell
, len
);
881 *basep
= fdt_addr_to_cpu(*cell
);
882 *sizep
= fdt_size_to_cpu(cell
[1]);
883 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
890 * Read a flash entry from the fdt
892 * @param blob FDT blob
893 * @param node Offset of node to read
894 * @param name Name of node being read
895 * @param entry Place to put offset and size of this node
896 * @return 0 if ok, -ve on error
898 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
899 struct fmap_entry
*entry
)
904 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
905 debug("Node '%s' has bad/missing 'reg' property\n", name
);
906 return -FDT_ERR_NOTFOUND
;
908 entry
->offset
= reg
[0];
909 entry
->length
= reg
[1];
910 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
911 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
912 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
913 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
914 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
915 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
916 entry
->hash
= (uint8_t *)prop
;
921 static u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
926 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
931 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
932 unsigned int index
, struct fdt_resource
*res
)
934 const fdt32_t
*ptr
, *end
;
935 int na
, ns
, len
, parent
;
938 parent
= fdt_parent_offset(fdt
, node
);
942 na
= fdt_address_cells(fdt
, parent
);
943 ns
= fdt_size_cells(fdt
, parent
);
945 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
949 end
= ptr
+ len
/ sizeof(*ptr
);
951 while (ptr
+ na
+ ns
<= end
) {
953 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
954 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
962 return -FDT_ERR_NOTFOUND
;
965 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
966 const char *prop_names
, const char *name
,
967 struct fdt_resource
*res
)
971 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
975 return fdt_get_resource(fdt
, node
, property
, index
, res
);
978 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
979 const char *mem_type
, const char *suffix
,
980 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
984 fdt_size_t size
, offset_size
;
985 fdt_addr_t base
, offset
;
988 if (config_node
== -1) {
989 config_node
= fdt_path_offset(blob
, "/config");
990 if (config_node
< 0) {
991 debug("%s: Cannot find /config node\n", __func__
);
998 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1000 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1002 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1007 node
= fdt_path_offset(blob
, mem
);
1009 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1010 fdt_strerror(node
));
1015 * Not strictly correct - the memory may have multiple banks. We just
1018 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1019 debug("%s: Failed to decode memory region %s\n", __func__
,
1024 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1026 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1028 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1033 *basep
= base
+ offset
;
1034 *sizep
= offset_size
;