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
+
174 debug("(not found)\n");
178 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
180 const char *list
, *end
;
183 list
= fdt_getprop(blob
, node
, "compatible", &len
);
192 if (len
>= strlen("pciVVVV,DDDD")) {
193 s
= strstr(list
, "pci");
196 * check if the string is something like pciVVVV,DDDD.RR
197 * or just pciVVVV,DDDD
199 if (s
&& s
[7] == ',' &&
200 (s
[12] == '.' || s
[12] == 0)) {
202 *vendor
= simple_strtol(s
, NULL
, 16);
205 *device
= simple_strtol(s
, NULL
, 16);
217 int fdtdec_get_pci_bdf(const void *blob
, int node
,
218 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
220 u16 dt_vendor
, dt_device
, vendor
, device
;
223 /* get vendor id & device id from the compatible string */
224 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
228 /* extract the bdf from fdt_pci_addr */
229 *bdf
= addr
->phys_hi
& 0xffff00;
231 /* read vendor id & device id based on bdf */
232 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
233 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
236 * Note there are two places in the device tree to fully describe
237 * a pci device: one is via compatible string with a format of
238 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
239 * the device node's reg address property. We read the vendor id
240 * and device id based on bdf and compare the values with the
241 * "VVVV,DDDD". If they are the same, then we are good to use bdf
242 * to read device's bar. But if they are different, we have to rely
243 * on the vendor id and device id extracted from the compatible
244 * string and locate the real bdf by pci_find_device(). This is
245 * because normally we may only know device's device number and
246 * function number when writing device tree. The bus number is
247 * dynamically assigned during the pci enumeration process.
249 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
250 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
258 int fdtdec_get_pci_bar32(const void *blob
, int node
,
259 struct fdt_pci_addr
*addr
, u32
*bar
)
265 /* get pci devices's bdf */
266 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
270 /* extract the bar number from fdt_pci_addr */
271 barnum
= addr
->phys_hi
& 0xff;
272 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
275 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
276 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
282 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
283 uint64_t default_val
)
285 const uint64_t *cell64
;
288 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
289 if (!cell64
|| length
< sizeof(*cell64
))
292 return fdt64_to_cpu(*cell64
);
295 int fdtdec_get_is_enabled(const void *blob
, int node
)
300 * It should say "okay", so only allow that. Some fdts use "ok" but
301 * this is a bug. Please fix your device tree source file. See here
304 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
306 cell
= fdt_getprop(blob
, node
, "status", NULL
);
308 return 0 == strcmp(cell
, "okay");
312 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
314 enum fdt_compat_id id
;
316 /* Search our drivers */
317 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
318 if (0 == fdt_node_check_compatible(blob
, node
,
321 return COMPAT_UNKNOWN
;
324 int fdtdec_next_compatible(const void *blob
, int node
,
325 enum fdt_compat_id id
)
327 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
330 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
331 enum fdt_compat_id id
, int *depthp
)
334 node
= fdt_next_node(blob
, node
, depthp
);
335 } while (*depthp
> 1);
337 /* If this is a direct subnode, and compatible, return it */
338 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
339 blob
, node
, compat_names
[id
]))
342 return -FDT_ERR_NOTFOUND
;
345 int fdtdec_next_alias(const void *blob
, const char *name
,
346 enum fdt_compat_id id
, int *upto
)
348 #define MAX_STR_LEN 20
349 char str
[MAX_STR_LEN
+ 20];
352 /* snprintf() is not available */
353 assert(strlen(name
) < MAX_STR_LEN
);
354 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
355 node
= fdt_path_offset(blob
, str
);
358 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
362 return -FDT_ERR_NOTFOUND
;
367 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
368 enum fdt_compat_id id
, int *node_list
, int maxcount
)
370 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
372 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
375 /* TODO: Can we tighten this code up a little? */
376 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
377 enum fdt_compat_id id
, int *node_list
, int maxcount
)
379 int name_len
= strlen(name
);
387 /* find the alias node if present */
388 alias_node
= fdt_path_offset(blob
, "/aliases");
391 * start with nothing, and we can assume that the root node can't
394 memset(nodes
, '\0', sizeof(nodes
));
396 /* First find all the compatible nodes */
397 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
398 node
= fdtdec_next_compatible(blob
, node
, id
);
400 nodes
[count
++] = node
;
403 debug("%s: warning: maxcount exceeded with alias '%s'\n",
406 /* Now find all the aliases */
407 for (offset
= fdt_first_property_offset(blob
, alias_node
);
409 offset
= fdt_next_property_offset(blob
, offset
)) {
410 const struct fdt_property
*prop
;
416 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
417 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
418 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
419 node
= fdt_path_offset(blob
, prop
->data
);
423 /* Get the alias number */
424 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
425 if (number
< 0 || number
>= maxcount
) {
426 debug("%s: warning: alias '%s' is out of range\n",
431 /* Make sure the node we found is actually in our list! */
433 for (j
= 0; j
< count
; j
++)
434 if (nodes
[j
] == node
) {
440 debug("%s: warning: alias '%s' points to a node "
441 "'%s' that is missing or is not compatible "
442 " with '%s'\n", __func__
, path
,
443 fdt_get_name(blob
, node
, NULL
),
449 * Add this node to our list in the right place, and mark
452 if (fdtdec_get_is_enabled(blob
, node
)) {
453 if (node_list
[number
]) {
454 debug("%s: warning: alias '%s' requires that "
455 "a node be placed in the list in a "
456 "position which is already filled by "
457 "node '%s'\n", __func__
, path
,
458 fdt_get_name(blob
, node
, NULL
));
461 node_list
[number
] = node
;
462 if (number
>= num_found
)
463 num_found
= number
+ 1;
468 /* Add any nodes not mentioned by an alias */
469 for (i
= j
= 0; i
< maxcount
; i
++) {
471 for (; j
< maxcount
; j
++)
473 fdtdec_get_is_enabled(blob
, nodes
[j
]))
476 /* Have we run out of nodes to add? */
480 assert(!node_list
[i
]);
481 node_list
[i
] = nodes
[j
++];
490 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
493 int base_len
= strlen(base
);
494 const char *find_name
;
499 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
500 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
502 aliases
= fdt_path_offset(blob
, "/aliases");
503 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
505 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
512 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
513 debug(" - %s, %s\n", name
, prop
);
514 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
515 strncmp(name
, base
, base_len
))
518 slash
= strrchr(prop
, '/');
519 if (strcmp(slash
+ 1, find_name
))
521 for (p
= name
+ strlen(name
) - 1; p
> name
; p
--) {
523 *seqp
= simple_strtoul(p
+ 1, NULL
, 10);
524 debug("Found seq %d\n", *seqp
);
530 debug("Not found\n");
534 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
541 return -FDT_ERR_NOTFOUND
;
542 chosen_node
= fdt_path_offset(blob
, "/chosen");
543 prop
= fdt_getprop(blob
, chosen_node
, name
, &len
);
545 return -FDT_ERR_NOTFOUND
;
546 return fdt_path_offset(blob
, prop
);
549 int fdtdec_check_fdt(void)
552 * We must have an FDT, but we cannot panic() yet since the console
553 * is not ready. So for now, just assert(). Boards which need an early
554 * FDT (prior to console ready) will need to make their own
555 * arrangements and do their own checks.
557 assert(!fdtdec_prepare_fdt());
562 * This function is a little odd in that it accesses global data. At some
563 * point if the architecture board.c files merge this will make more sense.
564 * Even now, it is common code.
566 int fdtdec_prepare_fdt(void)
568 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
569 fdt_check_header(gd
->fdt_blob
)) {
570 printf("No valid FDT found - please append one to U-Boot "
571 "binary, use u-boot-dtb.bin or define "
572 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
578 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
583 debug("%s: %s\n", __func__
, prop_name
);
584 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
586 return -FDT_ERR_NOTFOUND
;
588 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
593 * Look up a property in a node and check that it has a minimum length.
595 * @param blob FDT blob
596 * @param node node to examine
597 * @param prop_name name of property to find
598 * @param min_len minimum property length in bytes
599 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
600 found, or -FDT_ERR_BADLAYOUT if not enough data
601 * @return pointer to cell, which is only valid if err == 0
603 static const void *get_prop_check_min_len(const void *blob
, int node
,
604 const char *prop_name
, int min_len
, int *err
)
609 debug("%s: %s\n", __func__
, prop_name
);
610 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
612 *err
= -FDT_ERR_NOTFOUND
;
613 else if (len
< min_len
)
614 *err
= -FDT_ERR_BADLAYOUT
;
620 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
621 u32
*array
, int count
)
626 debug("%s: %s\n", __func__
, prop_name
);
627 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
628 sizeof(u32
) * count
, &err
);
630 for (i
= 0; i
< count
; i
++)
631 array
[i
] = fdt32_to_cpu(cell
[i
]);
636 int fdtdec_get_int_array_count(const void *blob
, int node
,
637 const char *prop_name
, u32
*array
, int count
)
643 debug("%s: %s\n", __func__
, prop_name
);
644 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
646 return -FDT_ERR_NOTFOUND
;
647 elems
= len
/ sizeof(u32
);
650 for (i
= 0; i
< count
; i
++)
651 array
[i
] = fdt32_to_cpu(cell
[i
]);
656 const u32
*fdtdec_locate_array(const void *blob
, int node
,
657 const char *prop_name
, int count
)
662 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
663 sizeof(u32
) * count
, &err
);
664 return err
? NULL
: cell
;
667 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
672 debug("%s: %s\n", __func__
, prop_name
);
673 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
677 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
678 const char *list_name
,
679 const char *cells_name
,
680 int cell_count
, int index
,
681 struct fdtdec_phandle_args
*out_args
)
683 const __be32
*list
, *list_end
;
684 int rc
= 0, size
, cur_index
= 0;
689 /* Retrieve the phandle list property */
690 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
693 list_end
= list
+ size
/ sizeof(*list
);
695 /* Loop over the phandles until all the requested entry is found */
696 while (list
< list_end
) {
701 * If phandle is 0, then it is an empty entry with no
702 * arguments. Skip forward to the next entry.
704 phandle
= be32_to_cpup(list
++);
707 * Find the provider node and parse the #*-cells
708 * property to determine the argument length.
710 * This is not needed if the cell count is hard-coded
711 * (i.e. cells_name not set, but cell_count is set),
712 * except when we're going to return the found node
715 if (cells_name
|| cur_index
== index
) {
716 node
= fdt_node_offset_by_phandle(blob
,
719 debug("%s: could not find phandle\n",
720 fdt_get_name(blob
, src_node
,
727 count
= fdtdec_get_int(blob
, node
, cells_name
,
730 debug("%s: could not get %s for %s\n",
731 fdt_get_name(blob
, src_node
,
734 fdt_get_name(blob
, node
,
743 * Make sure that the arguments actually fit in the
744 * remaining property data length
746 if (list
+ count
> list_end
) {
747 debug("%s: arguments longer than property\n",
748 fdt_get_name(blob
, src_node
, NULL
));
754 * All of the error cases above bail out of the loop, so at
755 * this point, the parsing is successful. If the requested
756 * index matches, then fill the out_args structure and return,
757 * or return -ENOENT for an empty entry.
760 if (cur_index
== index
) {
767 if (count
> MAX_PHANDLE_ARGS
) {
768 debug("%s: too many arguments %d\n",
769 fdt_get_name(blob
, src_node
,
771 count
= MAX_PHANDLE_ARGS
;
773 out_args
->node
= node
;
774 out_args
->args_count
= count
;
775 for (i
= 0; i
< count
; i
++) {
777 be32_to_cpup(list
++);
781 /* Found it! return success */
791 * Result will be one of:
792 * -ENOENT : index is for empty phandle
793 * -EINVAL : parsing error on data
794 * [1..n] : Number of phandle (count mode; when index = -1)
796 rc
= index
< 0 ? cur_index
: -ENOENT
;
801 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
802 u8
*array
, int count
)
807 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
809 memcpy(array
, cell
, count
);
813 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
814 const char *prop_name
, int count
)
819 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
825 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
830 debug("%s: %s\n", __func__
, prop_name
);
831 config_node
= fdt_path_offset(blob
, "/config");
834 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
837 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
842 debug("%s: %s\n", __func__
, prop_name
);
843 config_node
= fdt_path_offset(blob
, "/config");
846 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
851 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
857 debug("%s: %s\n", __func__
, prop_name
);
858 nodeoffset
= fdt_path_offset(blob
, "/config");
862 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
866 return (char *)nodep
;
869 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
870 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
872 const fdt_addr_t
*cell
;
875 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
877 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
878 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
879 debug("cell=%p, len=%d\n", cell
, len
);
883 *basep
= fdt_addr_to_cpu(*cell
);
884 *sizep
= fdt_size_to_cpu(cell
[1]);
885 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
892 * Read a flash entry from the fdt
894 * @param blob FDT blob
895 * @param node Offset of node to read
896 * @param name Name of node being read
897 * @param entry Place to put offset and size of this node
898 * @return 0 if ok, -ve on error
900 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
901 struct fmap_entry
*entry
)
906 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
907 debug("Node '%s' has bad/missing 'reg' property\n", name
);
908 return -FDT_ERR_NOTFOUND
;
910 entry
->offset
= reg
[0];
911 entry
->length
= reg
[1];
912 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
913 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
914 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
915 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
916 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
917 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
918 entry
->hash
= (uint8_t *)prop
;
923 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
928 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
933 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
934 unsigned int index
, struct fdt_resource
*res
)
936 const fdt32_t
*ptr
, *end
;
937 int na
, ns
, len
, parent
;
940 parent
= fdt_parent_offset(fdt
, node
);
944 na
= fdt_address_cells(fdt
, parent
);
945 ns
= fdt_size_cells(fdt
, parent
);
947 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
951 end
= ptr
+ len
/ sizeof(*ptr
);
953 while (ptr
+ na
+ ns
<= end
) {
955 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
956 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
964 return -FDT_ERR_NOTFOUND
;
967 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
968 const char *prop_names
, const char *name
,
969 struct fdt_resource
*res
)
973 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
977 return fdt_get_resource(fdt
, node
, property
, index
, res
);
980 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
981 const char *mem_type
, const char *suffix
,
982 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
986 fdt_size_t size
, offset_size
;
987 fdt_addr_t base
, offset
;
990 if (config_node
== -1) {
991 config_node
= fdt_path_offset(blob
, "/config");
992 if (config_node
< 0) {
993 debug("%s: Cannot find /config node\n", __func__
);
1000 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1002 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1004 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1009 node
= fdt_path_offset(blob
, mem
);
1011 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1012 fdt_strerror(node
));
1017 * Not strictly correct - the memory may have multiple banks. We just
1020 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1021 debug("%s: Failed to decode memory region %s\n", __func__
,
1026 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1028 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1030 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1035 *basep
= base
+ offset
;
1036 *sizep
= offset_size
;