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"),
80 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
82 /* We allow reading of the 'unknown' ID for testing purposes */
83 assert(id
>= 0 && id
< COMPAT_COUNT
);
84 return compat_names
[id
];
87 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
88 const char *prop_name
, fdt_size_t
*sizep
)
90 const fdt_addr_t
*cell
;
93 debug("%s: %s: ", __func__
, prop_name
);
94 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
95 if (cell
&& ((!sizep
&& len
== sizeof(fdt_addr_t
)) ||
96 len
== sizeof(fdt_addr_t
) * 2)) {
97 fdt_addr_t addr
= fdt_addr_to_cpu(*cell
);
99 const fdt_size_t
*size
;
101 size
= (fdt_size_t
*)((char *)cell
+
103 *sizep
= fdt_size_to_cpu(*size
);
104 debug("addr=%08lx, size=%08x\n",
105 (ulong
)addr
, *sizep
);
107 debug("%08lx\n", (ulong
)addr
);
111 debug("(not found)\n");
112 return FDT_ADDR_T_NONE
;
115 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
116 const char *prop_name
)
118 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
122 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
123 const char *prop_name
, struct fdt_pci_addr
*addr
)
129 debug("%s: %s: ", __func__
, prop_name
);
132 * If we follow the pci bus bindings strictly, we should check
133 * the value of the node's parent node's #address-cells and
134 * #size-cells. They need to be 3 and 2 accordingly. However,
135 * for simplicity we skip the check here.
137 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
141 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
142 int num
= len
/ FDT_PCI_REG_SIZE
;
145 for (i
= 0; i
< num
; i
++) {
146 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
147 (ulong
)fdt_addr_to_cpu(cell
[0]),
148 (ulong
)fdt_addr_to_cpu(cell
[1]),
149 (ulong
)fdt_addr_to_cpu(cell
[2]));
150 if ((fdt_addr_to_cpu(*cell
) & type
) == type
) {
151 addr
->phys_hi
= fdt_addr_to_cpu(cell
[0]);
152 addr
->phys_mid
= fdt_addr_to_cpu(cell
[1]);
153 addr
->phys_lo
= fdt_addr_to_cpu(cell
[2]);
156 cell
+= (FDT_PCI_ADDR_CELLS
+
170 debug("(not found)\n");
174 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
176 const char *list
, *end
;
179 list
= fdt_getprop(blob
, node
, "compatible", &len
);
188 if (len
>= strlen("pciVVVV,DDDD")) {
189 s
= strstr(list
, "pci");
192 * check if the string is something like pciVVVV,DDDD.RR
193 * or just pciVVVV,DDDD
195 if (s
&& s
[7] == ',' &&
196 (s
[12] == '.' || s
[12] == 0)) {
198 *vendor
= simple_strtol(s
, NULL
, 16);
201 *device
= simple_strtol(s
, NULL
, 16);
213 int fdtdec_get_pci_bdf(const void *blob
, int node
,
214 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
216 u16 dt_vendor
, dt_device
, vendor
, device
;
219 /* get vendor id & device id from the compatible string */
220 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
224 /* extract the bdf from fdt_pci_addr */
225 *bdf
= addr
->phys_hi
& 0xffff00;
227 /* read vendor id & device id based on bdf */
228 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
229 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
232 * Note there are two places in the device tree to fully describe
233 * a pci device: one is via compatible string with a format of
234 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
235 * the device node's reg address property. We read the vendor id
236 * and device id based on bdf and compare the values with the
237 * "VVVV,DDDD". If they are the same, then we are good to use bdf
238 * to read device's bar. But if they are different, we have to rely
239 * on the vendor id and device id extracted from the compatible
240 * string and locate the real bdf by pci_find_device(). This is
241 * because normally we may only know device's device number and
242 * function number when writing device tree. The bus number is
243 * dynamically assigned during the pci enumeration process.
245 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
246 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
254 int fdtdec_get_pci_bar32(const void *blob
, int node
,
255 struct fdt_pci_addr
*addr
, u32
*bar
)
261 /* get pci devices's bdf */
262 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
266 /* extract the bar number from fdt_pci_addr */
267 barnum
= addr
->phys_hi
& 0xff;
268 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
271 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
272 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
278 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
279 uint64_t default_val
)
281 const uint64_t *cell64
;
284 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
285 if (!cell64
|| length
< sizeof(*cell64
))
288 return fdt64_to_cpu(*cell64
);
291 int fdtdec_get_is_enabled(const void *blob
, int node
)
296 * It should say "okay", so only allow that. Some fdts use "ok" but
297 * this is a bug. Please fix your device tree source file. See here
300 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
302 cell
= fdt_getprop(blob
, node
, "status", NULL
);
304 return 0 == strcmp(cell
, "okay");
308 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
310 enum fdt_compat_id id
;
312 /* Search our drivers */
313 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
314 if (0 == fdt_node_check_compatible(blob
, node
,
317 return COMPAT_UNKNOWN
;
320 int fdtdec_next_compatible(const void *blob
, int node
,
321 enum fdt_compat_id id
)
323 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
326 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
327 enum fdt_compat_id id
, int *depthp
)
330 node
= fdt_next_node(blob
, node
, depthp
);
331 } while (*depthp
> 1);
333 /* If this is a direct subnode, and compatible, return it */
334 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
335 blob
, node
, compat_names
[id
]))
338 return -FDT_ERR_NOTFOUND
;
341 int fdtdec_next_alias(const void *blob
, const char *name
,
342 enum fdt_compat_id id
, int *upto
)
344 #define MAX_STR_LEN 20
345 char str
[MAX_STR_LEN
+ 20];
348 /* snprintf() is not available */
349 assert(strlen(name
) < MAX_STR_LEN
);
350 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
351 node
= fdt_path_offset(blob
, str
);
354 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
358 return -FDT_ERR_NOTFOUND
;
363 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
364 enum fdt_compat_id id
, int *node_list
, int maxcount
)
366 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
368 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
371 /* TODO: Can we tighten this code up a little? */
372 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
373 enum fdt_compat_id id
, int *node_list
, int maxcount
)
375 int name_len
= strlen(name
);
383 /* find the alias node if present */
384 alias_node
= fdt_path_offset(blob
, "/aliases");
387 * start with nothing, and we can assume that the root node can't
390 memset(nodes
, '\0', sizeof(nodes
));
392 /* First find all the compatible nodes */
393 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
394 node
= fdtdec_next_compatible(blob
, node
, id
);
396 nodes
[count
++] = node
;
399 debug("%s: warning: maxcount exceeded with alias '%s'\n",
402 /* Now find all the aliases */
403 for (offset
= fdt_first_property_offset(blob
, alias_node
);
405 offset
= fdt_next_property_offset(blob
, offset
)) {
406 const struct fdt_property
*prop
;
412 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
413 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
414 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
415 node
= fdt_path_offset(blob
, prop
->data
);
419 /* Get the alias number */
420 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
421 if (number
< 0 || number
>= maxcount
) {
422 debug("%s: warning: alias '%s' is out of range\n",
427 /* Make sure the node we found is actually in our list! */
429 for (j
= 0; j
< count
; j
++)
430 if (nodes
[j
] == node
) {
436 debug("%s: warning: alias '%s' points to a node "
437 "'%s' that is missing or is not compatible "
438 " with '%s'\n", __func__
, path
,
439 fdt_get_name(blob
, node
, NULL
),
445 * Add this node to our list in the right place, and mark
448 if (fdtdec_get_is_enabled(blob
, node
)) {
449 if (node_list
[number
]) {
450 debug("%s: warning: alias '%s' requires that "
451 "a node be placed in the list in a "
452 "position which is already filled by "
453 "node '%s'\n", __func__
, path
,
454 fdt_get_name(blob
, node
, NULL
));
457 node_list
[number
] = node
;
458 if (number
>= num_found
)
459 num_found
= number
+ 1;
464 /* Add any nodes not mentioned by an alias */
465 for (i
= j
= 0; i
< maxcount
; i
++) {
467 for (; j
< maxcount
; j
++)
469 fdtdec_get_is_enabled(blob
, nodes
[j
]))
472 /* Have we run out of nodes to add? */
476 assert(!node_list
[i
]);
477 node_list
[i
] = nodes
[j
++];
486 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
489 int base_len
= strlen(base
);
490 const char *find_name
;
495 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
496 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
498 aliases
= fdt_path_offset(blob
, "/aliases");
499 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
501 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
508 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
509 debug(" - %s, %s\n", name
, prop
);
510 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
511 strncmp(name
, base
, base_len
))
514 slash
= strrchr(prop
, '/');
515 if (strcmp(slash
+ 1, find_name
))
517 for (p
= name
+ strlen(name
) - 1; p
> name
; p
--) {
519 *seqp
= simple_strtoul(p
+ 1, NULL
, 10);
520 debug("Found seq %d\n", *seqp
);
526 debug("Not found\n");
530 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
537 return -FDT_ERR_NOTFOUND
;
538 chosen_node
= fdt_path_offset(blob
, "/chosen");
539 prop
= fdt_getprop(blob
, chosen_node
, name
, &len
);
541 return -FDT_ERR_NOTFOUND
;
542 return fdt_path_offset(blob
, prop
);
545 int fdtdec_check_fdt(void)
548 * We must have an FDT, but we cannot panic() yet since the console
549 * is not ready. So for now, just assert(). Boards which need an early
550 * FDT (prior to console ready) will need to make their own
551 * arrangements and do their own checks.
553 assert(!fdtdec_prepare_fdt());
558 * This function is a little odd in that it accesses global data. At some
559 * point if the architecture board.c files merge this will make more sense.
560 * Even now, it is common code.
562 int fdtdec_prepare_fdt(void)
564 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
565 fdt_check_header(gd
->fdt_blob
)) {
566 printf("No valid FDT found - please append one to U-Boot "
567 "binary, use u-boot-dtb.bin or define "
568 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
574 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
579 debug("%s: %s\n", __func__
, prop_name
);
580 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
582 return -FDT_ERR_NOTFOUND
;
584 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
589 * Look up a property in a node and check that it has a minimum length.
591 * @param blob FDT blob
592 * @param node node to examine
593 * @param prop_name name of property to find
594 * @param min_len minimum property length in bytes
595 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
596 found, or -FDT_ERR_BADLAYOUT if not enough data
597 * @return pointer to cell, which is only valid if err == 0
599 static const void *get_prop_check_min_len(const void *blob
, int node
,
600 const char *prop_name
, int min_len
, int *err
)
605 debug("%s: %s\n", __func__
, prop_name
);
606 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
608 *err
= -FDT_ERR_NOTFOUND
;
609 else if (len
< min_len
)
610 *err
= -FDT_ERR_BADLAYOUT
;
616 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
617 u32
*array
, int count
)
622 debug("%s: %s\n", __func__
, prop_name
);
623 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
624 sizeof(u32
) * count
, &err
);
626 for (i
= 0; i
< count
; i
++)
627 array
[i
] = fdt32_to_cpu(cell
[i
]);
632 int fdtdec_get_int_array_count(const void *blob
, int node
,
633 const char *prop_name
, u32
*array
, int count
)
639 debug("%s: %s\n", __func__
, prop_name
);
640 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
642 return -FDT_ERR_NOTFOUND
;
643 elems
= len
/ sizeof(u32
);
646 for (i
= 0; i
< count
; i
++)
647 array
[i
] = fdt32_to_cpu(cell
[i
]);
652 const u32
*fdtdec_locate_array(const void *blob
, int node
,
653 const char *prop_name
, int count
)
658 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
659 sizeof(u32
) * count
, &err
);
660 return err
? NULL
: cell
;
663 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
668 debug("%s: %s\n", __func__
, prop_name
);
669 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
673 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
674 const char *list_name
,
675 const char *cells_name
,
676 int cell_count
, int index
,
677 struct fdtdec_phandle_args
*out_args
)
679 const __be32
*list
, *list_end
;
680 int rc
= 0, size
, cur_index
= 0;
685 /* Retrieve the phandle list property */
686 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
689 list_end
= list
+ size
/ sizeof(*list
);
691 /* Loop over the phandles until all the requested entry is found */
692 while (list
< list_end
) {
697 * If phandle is 0, then it is an empty entry with no
698 * arguments. Skip forward to the next entry.
700 phandle
= be32_to_cpup(list
++);
703 * Find the provider node and parse the #*-cells
704 * property to determine the argument length.
706 * This is not needed if the cell count is hard-coded
707 * (i.e. cells_name not set, but cell_count is set),
708 * except when we're going to return the found node
711 if (cells_name
|| cur_index
== index
) {
712 node
= fdt_node_offset_by_phandle(blob
,
715 debug("%s: could not find phandle\n",
716 fdt_get_name(blob
, src_node
,
723 count
= fdtdec_get_int(blob
, node
, cells_name
,
726 debug("%s: could not get %s for %s\n",
727 fdt_get_name(blob
, src_node
,
730 fdt_get_name(blob
, node
,
739 * Make sure that the arguments actually fit in the
740 * remaining property data length
742 if (list
+ count
> list_end
) {
743 debug("%s: arguments longer than property\n",
744 fdt_get_name(blob
, src_node
, NULL
));
750 * All of the error cases above bail out of the loop, so at
751 * this point, the parsing is successful. If the requested
752 * index matches, then fill the out_args structure and return,
753 * or return -ENOENT for an empty entry.
756 if (cur_index
== index
) {
763 if (count
> MAX_PHANDLE_ARGS
) {
764 debug("%s: too many arguments %d\n",
765 fdt_get_name(blob
, src_node
,
767 count
= MAX_PHANDLE_ARGS
;
769 out_args
->node
= node
;
770 out_args
->args_count
= count
;
771 for (i
= 0; i
< count
; i
++) {
773 be32_to_cpup(list
++);
777 /* Found it! return success */
787 * Result will be one of:
788 * -ENOENT : index is for empty phandle
789 * -EINVAL : parsing error on data
790 * [1..n] : Number of phandle (count mode; when index = -1)
792 rc
= index
< 0 ? cur_index
: -ENOENT
;
797 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
798 u8
*array
, int count
)
803 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
805 memcpy(array
, cell
, count
);
809 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
810 const char *prop_name
, int count
)
815 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
821 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
826 debug("%s: %s\n", __func__
, prop_name
);
827 config_node
= fdt_path_offset(blob
, "/config");
830 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
833 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
838 debug("%s: %s\n", __func__
, prop_name
);
839 config_node
= fdt_path_offset(blob
, "/config");
842 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
847 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
853 debug("%s: %s\n", __func__
, prop_name
);
854 nodeoffset
= fdt_path_offset(blob
, "/config");
858 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
862 return (char *)nodep
;
865 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
866 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
868 const fdt_addr_t
*cell
;
871 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
873 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
874 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
875 debug("cell=%p, len=%d\n", cell
, len
);
879 *basep
= fdt_addr_to_cpu(*cell
);
880 *sizep
= fdt_size_to_cpu(cell
[1]);
881 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
888 * Read a flash entry from the fdt
890 * @param blob FDT blob
891 * @param node Offset of node to read
892 * @param name Name of node being read
893 * @param entry Place to put offset and size of this node
894 * @return 0 if ok, -ve on error
896 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
897 struct fmap_entry
*entry
)
902 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
903 debug("Node '%s' has bad/missing 'reg' property\n", name
);
904 return -FDT_ERR_NOTFOUND
;
906 entry
->offset
= reg
[0];
907 entry
->length
= reg
[1];
908 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
909 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
910 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
911 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
912 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
913 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
914 entry
->hash
= (uint8_t *)prop
;
919 static u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
924 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
929 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
930 unsigned int index
, struct fdt_resource
*res
)
932 const fdt32_t
*ptr
, *end
;
933 int na
, ns
, len
, parent
;
936 parent
= fdt_parent_offset(fdt
, node
);
940 na
= fdt_address_cells(fdt
, parent
);
941 ns
= fdt_size_cells(fdt
, parent
);
943 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
947 end
= ptr
+ len
/ sizeof(*ptr
);
949 while (ptr
+ na
+ ns
<= end
) {
951 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
952 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
960 return -FDT_ERR_NOTFOUND
;
963 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
964 const char *prop_names
, const char *name
,
965 struct fdt_resource
*res
)
969 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
973 return fdt_get_resource(fdt
, node
, property
, index
, res
);
976 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
977 const char *mem_type
, const char *suffix
,
978 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
982 fdt_size_t size
, offset_size
;
983 fdt_addr_t base
, offset
;
986 if (config_node
== -1) {
987 config_node
= fdt_path_offset(blob
, "/config");
988 if (config_node
< 0) {
989 debug("%s: Cannot find /config node\n", __func__
);
996 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
998 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1000 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1005 node
= fdt_path_offset(blob
, mem
);
1007 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1008 fdt_strerror(node
));
1013 * Not strictly correct - the memory may have multiple banks. We just
1016 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1017 debug("%s: Failed to decode memory region %s\n", __func__
,
1022 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1024 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1026 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1031 *basep
= base
+ offset
;
1032 *sizep
= offset_size
;