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,bd82x6x-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"),
80 COMPAT(COMPAT_INTEL_PCH
, "intel,bd82x6x"),
83 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
85 /* We allow reading of the 'unknown' ID for testing purposes */
86 assert(id
>= 0 && id
< COMPAT_COUNT
);
87 return compat_names
[id
];
90 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
91 const char *prop_name
, fdt_size_t
*sizep
)
93 const fdt_addr_t
*cell
;
96 debug("%s: %s: ", __func__
, prop_name
);
97 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
98 if (cell
&& ((!sizep
&& len
== sizeof(fdt_addr_t
)) ||
99 len
== sizeof(fdt_addr_t
) * 2)) {
100 fdt_addr_t addr
= fdt_addr_to_cpu(*cell
);
102 const fdt_size_t
*size
;
104 size
= (fdt_size_t
*)((char *)cell
+
106 *sizep
= fdt_size_to_cpu(*size
);
107 debug("addr=%08lx, size=%08x\n",
108 (ulong
)addr
, *sizep
);
110 debug("%08lx\n", (ulong
)addr
);
114 debug("(not found)\n");
115 return FDT_ADDR_T_NONE
;
118 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
119 const char *prop_name
)
121 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
125 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
126 const char *prop_name
, struct fdt_pci_addr
*addr
)
132 debug("%s: %s: ", __func__
, prop_name
);
135 * If we follow the pci bus bindings strictly, we should check
136 * the value of the node's parent node's #address-cells and
137 * #size-cells. They need to be 3 and 2 accordingly. However,
138 * for simplicity we skip the check here.
140 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
144 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
145 int num
= len
/ FDT_PCI_REG_SIZE
;
148 for (i
= 0; i
< num
; i
++) {
149 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
150 (ulong
)fdt_addr_to_cpu(cell
[0]),
151 (ulong
)fdt_addr_to_cpu(cell
[1]),
152 (ulong
)fdt_addr_to_cpu(cell
[2]));
153 if ((fdt_addr_to_cpu(*cell
) & type
) == type
) {
154 addr
->phys_hi
= fdt_addr_to_cpu(cell
[0]);
155 addr
->phys_mid
= fdt_addr_to_cpu(cell
[1]);
156 addr
->phys_lo
= fdt_addr_to_cpu(cell
[2]);
159 cell
+= (FDT_PCI_ADDR_CELLS
+
175 debug("(not found)\n");
179 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
181 const char *list
, *end
;
184 list
= fdt_getprop(blob
, node
, "compatible", &len
);
193 if (len
>= strlen("pciVVVV,DDDD")) {
194 s
= strstr(list
, "pci");
197 * check if the string is something like pciVVVV,DDDD.RR
198 * or just pciVVVV,DDDD
200 if (s
&& s
[7] == ',' &&
201 (s
[12] == '.' || s
[12] == 0)) {
203 *vendor
= simple_strtol(s
, NULL
, 16);
206 *device
= simple_strtol(s
, NULL
, 16);
218 int fdtdec_get_pci_bdf(const void *blob
, int node
,
219 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
221 u16 dt_vendor
, dt_device
, vendor
, device
;
224 /* get vendor id & device id from the compatible string */
225 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
229 /* extract the bdf from fdt_pci_addr */
230 *bdf
= addr
->phys_hi
& 0xffff00;
232 /* read vendor id & device id based on bdf */
233 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
234 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
237 * Note there are two places in the device tree to fully describe
238 * a pci device: one is via compatible string with a format of
239 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
240 * the device node's reg address property. We read the vendor id
241 * and device id based on bdf and compare the values with the
242 * "VVVV,DDDD". If they are the same, then we are good to use bdf
243 * to read device's bar. But if they are different, we have to rely
244 * on the vendor id and device id extracted from the compatible
245 * string and locate the real bdf by pci_find_device(). This is
246 * because normally we may only know device's device number and
247 * function number when writing device tree. The bus number is
248 * dynamically assigned during the pci enumeration process.
250 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
251 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
259 int fdtdec_get_pci_bar32(const void *blob
, int node
,
260 struct fdt_pci_addr
*addr
, u32
*bar
)
266 /* get pci devices's bdf */
267 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
271 /* extract the bar number from fdt_pci_addr */
272 barnum
= addr
->phys_hi
& 0xff;
273 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
276 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
277 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
283 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
284 uint64_t default_val
)
286 const uint64_t *cell64
;
289 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
290 if (!cell64
|| length
< sizeof(*cell64
))
293 return fdt64_to_cpu(*cell64
);
296 int fdtdec_get_is_enabled(const void *blob
, int node
)
301 * It should say "okay", so only allow that. Some fdts use "ok" but
302 * this is a bug. Please fix your device tree source file. See here
305 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
307 cell
= fdt_getprop(blob
, node
, "status", NULL
);
309 return 0 == strcmp(cell
, "okay");
313 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
315 enum fdt_compat_id id
;
317 /* Search our drivers */
318 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
319 if (0 == fdt_node_check_compatible(blob
, node
,
322 return COMPAT_UNKNOWN
;
325 int fdtdec_next_compatible(const void *blob
, int node
,
326 enum fdt_compat_id id
)
328 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
331 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
332 enum fdt_compat_id id
, int *depthp
)
335 node
= fdt_next_node(blob
, node
, depthp
);
336 } while (*depthp
> 1);
338 /* If this is a direct subnode, and compatible, return it */
339 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
340 blob
, node
, compat_names
[id
]))
343 return -FDT_ERR_NOTFOUND
;
346 int fdtdec_next_alias(const void *blob
, const char *name
,
347 enum fdt_compat_id id
, int *upto
)
349 #define MAX_STR_LEN 20
350 char str
[MAX_STR_LEN
+ 20];
353 /* snprintf() is not available */
354 assert(strlen(name
) < MAX_STR_LEN
);
355 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
356 node
= fdt_path_offset(blob
, str
);
359 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
363 return -FDT_ERR_NOTFOUND
;
368 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
369 enum fdt_compat_id id
, int *node_list
, int maxcount
)
371 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
373 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
376 /* TODO: Can we tighten this code up a little? */
377 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
378 enum fdt_compat_id id
, int *node_list
, int maxcount
)
380 int name_len
= strlen(name
);
388 /* find the alias node if present */
389 alias_node
= fdt_path_offset(blob
, "/aliases");
392 * start with nothing, and we can assume that the root node can't
395 memset(nodes
, '\0', sizeof(nodes
));
397 /* First find all the compatible nodes */
398 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
399 node
= fdtdec_next_compatible(blob
, node
, id
);
401 nodes
[count
++] = node
;
404 debug("%s: warning: maxcount exceeded with alias '%s'\n",
407 /* Now find all the aliases */
408 for (offset
= fdt_first_property_offset(blob
, alias_node
);
410 offset
= fdt_next_property_offset(blob
, offset
)) {
411 const struct fdt_property
*prop
;
417 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
418 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
419 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
420 node
= fdt_path_offset(blob
, prop
->data
);
424 /* Get the alias number */
425 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
426 if (number
< 0 || number
>= maxcount
) {
427 debug("%s: warning: alias '%s' is out of range\n",
432 /* Make sure the node we found is actually in our list! */
434 for (j
= 0; j
< count
; j
++)
435 if (nodes
[j
] == node
) {
441 debug("%s: warning: alias '%s' points to a node "
442 "'%s' that is missing or is not compatible "
443 " with '%s'\n", __func__
, path
,
444 fdt_get_name(blob
, node
, NULL
),
450 * Add this node to our list in the right place, and mark
453 if (fdtdec_get_is_enabled(blob
, node
)) {
454 if (node_list
[number
]) {
455 debug("%s: warning: alias '%s' requires that "
456 "a node be placed in the list in a "
457 "position which is already filled by "
458 "node '%s'\n", __func__
, path
,
459 fdt_get_name(blob
, node
, NULL
));
462 node_list
[number
] = node
;
463 if (number
>= num_found
)
464 num_found
= number
+ 1;
469 /* Add any nodes not mentioned by an alias */
470 for (i
= j
= 0; i
< maxcount
; i
++) {
472 for (; j
< maxcount
; j
++)
474 fdtdec_get_is_enabled(blob
, nodes
[j
]))
477 /* Have we run out of nodes to add? */
481 assert(!node_list
[i
]);
482 node_list
[i
] = nodes
[j
++];
491 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
494 int base_len
= strlen(base
);
495 const char *find_name
;
500 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
501 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
503 aliases
= fdt_path_offset(blob
, "/aliases");
504 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
506 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
513 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
514 debug(" - %s, %s\n", name
, prop
);
515 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
516 strncmp(name
, base
, base_len
))
519 slash
= strrchr(prop
, '/');
520 if (strcmp(slash
+ 1, find_name
))
522 for (p
= name
+ strlen(name
) - 1; p
> name
; p
--) {
524 *seqp
= simple_strtoul(p
+ 1, NULL
, 10);
525 debug("Found seq %d\n", *seqp
);
531 debug("Not found\n");
535 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
542 return -FDT_ERR_NOTFOUND
;
543 chosen_node
= fdt_path_offset(blob
, "/chosen");
544 prop
= fdt_getprop(blob
, chosen_node
, name
, &len
);
546 return -FDT_ERR_NOTFOUND
;
547 return fdt_path_offset(blob
, prop
);
550 int fdtdec_check_fdt(void)
553 * We must have an FDT, but we cannot panic() yet since the console
554 * is not ready. So for now, just assert(). Boards which need an early
555 * FDT (prior to console ready) will need to make their own
556 * arrangements and do their own checks.
558 assert(!fdtdec_prepare_fdt());
563 * This function is a little odd in that it accesses global data. At some
564 * point if the architecture board.c files merge this will make more sense.
565 * Even now, it is common code.
567 int fdtdec_prepare_fdt(void)
569 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
570 fdt_check_header(gd
->fdt_blob
)) {
571 printf("No valid FDT found - please append one to U-Boot "
572 "binary, use u-boot-dtb.bin or define "
573 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
579 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
584 debug("%s: %s\n", __func__
, prop_name
);
585 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
587 return -FDT_ERR_NOTFOUND
;
589 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
594 * Look up a property in a node and check that it has a minimum length.
596 * @param blob FDT blob
597 * @param node node to examine
598 * @param prop_name name of property to find
599 * @param min_len minimum property length in bytes
600 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
601 found, or -FDT_ERR_BADLAYOUT if not enough data
602 * @return pointer to cell, which is only valid if err == 0
604 static const void *get_prop_check_min_len(const void *blob
, int node
,
605 const char *prop_name
, int min_len
, int *err
)
610 debug("%s: %s\n", __func__
, prop_name
);
611 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
613 *err
= -FDT_ERR_NOTFOUND
;
614 else if (len
< min_len
)
615 *err
= -FDT_ERR_BADLAYOUT
;
621 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
622 u32
*array
, int count
)
627 debug("%s: %s\n", __func__
, prop_name
);
628 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
629 sizeof(u32
) * count
, &err
);
631 for (i
= 0; i
< count
; i
++)
632 array
[i
] = fdt32_to_cpu(cell
[i
]);
637 int fdtdec_get_int_array_count(const void *blob
, int node
,
638 const char *prop_name
, u32
*array
, int count
)
644 debug("%s: %s\n", __func__
, prop_name
);
645 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
647 return -FDT_ERR_NOTFOUND
;
648 elems
= len
/ sizeof(u32
);
651 for (i
= 0; i
< count
; i
++)
652 array
[i
] = fdt32_to_cpu(cell
[i
]);
657 const u32
*fdtdec_locate_array(const void *blob
, int node
,
658 const char *prop_name
, int count
)
663 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
664 sizeof(u32
) * count
, &err
);
665 return err
? NULL
: cell
;
668 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
673 debug("%s: %s\n", __func__
, prop_name
);
674 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
678 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
679 const char *list_name
,
680 const char *cells_name
,
681 int cell_count
, int index
,
682 struct fdtdec_phandle_args
*out_args
)
684 const __be32
*list
, *list_end
;
685 int rc
= 0, size
, cur_index
= 0;
690 /* Retrieve the phandle list property */
691 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
694 list_end
= list
+ size
/ sizeof(*list
);
696 /* Loop over the phandles until all the requested entry is found */
697 while (list
< list_end
) {
702 * If phandle is 0, then it is an empty entry with no
703 * arguments. Skip forward to the next entry.
705 phandle
= be32_to_cpup(list
++);
708 * Find the provider node and parse the #*-cells
709 * property to determine the argument length.
711 * This is not needed if the cell count is hard-coded
712 * (i.e. cells_name not set, but cell_count is set),
713 * except when we're going to return the found node
716 if (cells_name
|| cur_index
== index
) {
717 node
= fdt_node_offset_by_phandle(blob
,
720 debug("%s: could not find phandle\n",
721 fdt_get_name(blob
, src_node
,
728 count
= fdtdec_get_int(blob
, node
, cells_name
,
731 debug("%s: could not get %s for %s\n",
732 fdt_get_name(blob
, src_node
,
735 fdt_get_name(blob
, node
,
744 * Make sure that the arguments actually fit in the
745 * remaining property data length
747 if (list
+ count
> list_end
) {
748 debug("%s: arguments longer than property\n",
749 fdt_get_name(blob
, src_node
, NULL
));
755 * All of the error cases above bail out of the loop, so at
756 * this point, the parsing is successful. If the requested
757 * index matches, then fill the out_args structure and return,
758 * or return -ENOENT for an empty entry.
761 if (cur_index
== index
) {
768 if (count
> MAX_PHANDLE_ARGS
) {
769 debug("%s: too many arguments %d\n",
770 fdt_get_name(blob
, src_node
,
772 count
= MAX_PHANDLE_ARGS
;
774 out_args
->node
= node
;
775 out_args
->args_count
= count
;
776 for (i
= 0; i
< count
; i
++) {
778 be32_to_cpup(list
++);
782 /* Found it! return success */
792 * Result will be one of:
793 * -ENOENT : index is for empty phandle
794 * -EINVAL : parsing error on data
795 * [1..n] : Number of phandle (count mode; when index = -1)
797 rc
= index
< 0 ? cur_index
: -ENOENT
;
802 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
803 u8
*array
, int count
)
808 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
810 memcpy(array
, cell
, count
);
814 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
815 const char *prop_name
, int count
)
820 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
826 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
831 debug("%s: %s\n", __func__
, prop_name
);
832 config_node
= fdt_path_offset(blob
, "/config");
835 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
838 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
843 debug("%s: %s\n", __func__
, prop_name
);
844 config_node
= fdt_path_offset(blob
, "/config");
847 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
852 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
858 debug("%s: %s\n", __func__
, prop_name
);
859 nodeoffset
= fdt_path_offset(blob
, "/config");
863 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
867 return (char *)nodep
;
870 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
871 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
873 const fdt_addr_t
*cell
;
876 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
878 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
879 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
880 debug("cell=%p, len=%d\n", cell
, len
);
884 *basep
= fdt_addr_to_cpu(*cell
);
885 *sizep
= fdt_size_to_cpu(cell
[1]);
886 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
893 * Read a flash entry from the fdt
895 * @param blob FDT blob
896 * @param node Offset of node to read
897 * @param name Name of node being read
898 * @param entry Place to put offset and size of this node
899 * @return 0 if ok, -ve on error
901 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
902 struct fmap_entry
*entry
)
907 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
908 debug("Node '%s' has bad/missing 'reg' property\n", name
);
909 return -FDT_ERR_NOTFOUND
;
911 entry
->offset
= reg
[0];
912 entry
->length
= reg
[1];
913 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
914 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
915 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
916 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
917 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
918 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
919 entry
->hash
= (uint8_t *)prop
;
924 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
929 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
934 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
935 unsigned int index
, struct fdt_resource
*res
)
937 const fdt32_t
*ptr
, *end
;
938 int na
, ns
, len
, parent
;
941 parent
= fdt_parent_offset(fdt
, node
);
945 na
= fdt_address_cells(fdt
, parent
);
946 ns
= fdt_size_cells(fdt
, parent
);
948 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
952 end
= ptr
+ len
/ sizeof(*ptr
);
954 while (ptr
+ na
+ ns
<= end
) {
956 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
957 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
965 return -FDT_ERR_NOTFOUND
;
968 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
969 const char *prop_names
, const char *name
,
970 struct fdt_resource
*res
)
974 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
978 return fdt_get_resource(fdt
, node
, property
, index
, res
);
981 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
982 const char *mem_type
, const char *suffix
,
983 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
987 fdt_size_t size
, offset_size
;
988 fdt_addr_t base
, offset
;
991 if (config_node
== -1) {
992 config_node
= fdt_path_offset(blob
, "/config");
993 if (config_node
< 0) {
994 debug("%s: Cannot find /config node\n", __func__
);
1001 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1003 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1005 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1010 node
= fdt_path_offset(blob
, mem
);
1012 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1013 fdt_strerror(node
));
1018 * Not strictly correct - the memory may have multiple banks. We just
1021 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1022 debug("%s: Failed to decode memory region %s\n", __func__
,
1027 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1029 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1031 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1036 *basep
= base
+ offset
;
1037 *sizep
= offset_size
;