2 * Copyright (c) 2011 The Chromium OS Authors.
3 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/sections.h>
13 #include <linux/ctype.h>
15 DECLARE_GLOBAL_DATA_PTR
;
18 * Here are the type we know about. One day we might allow drivers to
19 * register. For now we just put them here. The COMPAT macro allows us to
20 * turn this into a sparse list later, and keeps the ID with the name.
22 #define COMPAT(id, name) name
23 static const char * const compat_names
[COMPAT_COUNT
] = {
24 COMPAT(UNKNOWN
, "<none>"),
25 COMPAT(NVIDIA_TEGRA20_EMC
, "nvidia,tegra20-emc"),
26 COMPAT(NVIDIA_TEGRA20_EMC_TABLE
, "nvidia,tegra20-emc-table"),
27 COMPAT(NVIDIA_TEGRA20_KBC
, "nvidia,tegra20-kbc"),
28 COMPAT(NVIDIA_TEGRA20_NAND
, "nvidia,tegra20-nand"),
29 COMPAT(NVIDIA_TEGRA20_PWM
, "nvidia,tegra20-pwm"),
30 COMPAT(NVIDIA_TEGRA124_DC
, "nvidia,tegra124-dc"),
31 COMPAT(NVIDIA_TEGRA124_SOR
, "nvidia,tegra124-sor"),
32 COMPAT(NVIDIA_TEGRA124_PMC
, "nvidia,tegra124-pmc"),
33 COMPAT(NVIDIA_TEGRA20_DC
, "nvidia,tegra20-dc"),
34 COMPAT(NVIDIA_TEGRA210_SDMMC
, "nvidia,tegra210-sdhci"),
35 COMPAT(NVIDIA_TEGRA124_SDMMC
, "nvidia,tegra124-sdhci"),
36 COMPAT(NVIDIA_TEGRA30_SDMMC
, "nvidia,tegra30-sdhci"),
37 COMPAT(NVIDIA_TEGRA20_SDMMC
, "nvidia,tegra20-sdhci"),
38 COMPAT(NVIDIA_TEGRA124_PCIE
, "nvidia,tegra124-pcie"),
39 COMPAT(NVIDIA_TEGRA30_PCIE
, "nvidia,tegra30-pcie"),
40 COMPAT(NVIDIA_TEGRA20_PCIE
, "nvidia,tegra20-pcie"),
41 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL
, "nvidia,tegra124-xusb-padctl"),
42 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL
, "nvidia,tegra210-xusb-padctl"),
43 COMPAT(SMSC_LAN9215
, "smsc,lan9215"),
44 COMPAT(SAMSUNG_EXYNOS5_SROMC
, "samsung,exynos-sromc"),
45 COMPAT(SAMSUNG_S3C2440_I2C
, "samsung,s3c2440-i2c"),
46 COMPAT(SAMSUNG_EXYNOS5_SOUND
, "samsung,exynos-sound"),
47 COMPAT(WOLFSON_WM8994_CODEC
, "wolfson,wm8994-codec"),
48 COMPAT(GOOGLE_CROS_EC_KEYB
, "google,cros-ec-keyb"),
49 COMPAT(SAMSUNG_EXYNOS_USB_PHY
, "samsung,exynos-usb-phy"),
50 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY
, "samsung,exynos5250-usb3-phy"),
51 COMPAT(SAMSUNG_EXYNOS_TMU
, "samsung,exynos-tmu"),
52 COMPAT(SAMSUNG_EXYNOS_FIMD
, "samsung,exynos-fimd"),
53 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI
, "samsung,exynos-mipi-dsi"),
54 COMPAT(SAMSUNG_EXYNOS5_DP
, "samsung,exynos5-dp"),
55 COMPAT(SAMSUNG_EXYNOS_DWMMC
, "samsung,exynos-dwmmc"),
56 COMPAT(SAMSUNG_EXYNOS_MMC
, "samsung,exynos-mmc"),
57 COMPAT(SAMSUNG_EXYNOS_SERIAL
, "samsung,exynos4210-uart"),
58 COMPAT(MAXIM_MAX77686_PMIC
, "maxim,max77686"),
59 COMPAT(GENERIC_SPI_FLASH
, "spi-flash"),
60 COMPAT(MAXIM_98095_CODEC
, "maxim,max98095-codec"),
61 COMPAT(SAMSUNG_EXYNOS5_I2C
, "samsung,exynos5-hsi2c"),
62 COMPAT(SANDBOX_LCD_SDL
, "sandbox,lcd-sdl"),
63 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
64 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
65 COMPAT(MEMORY_SPD
, "memory-spd"),
66 COMPAT(INTEL_PANTHERPOINT_AHCI
, "intel,pantherpoint-ahci"),
67 COMPAT(INTEL_MODEL_206AX
, "intel,model-206ax"),
68 COMPAT(INTEL_GMA
, "intel,gma"),
69 COMPAT(AMS_AS3722
, "ams,as3722"),
70 COMPAT(INTEL_ICH_SPI
, "intel,ich-spi"),
71 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
72 COMPAT(INTEL_X86_PINCTRL
, "intel,x86-pinctrl"),
73 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
74 COMPAT(COMPAT_INTEL_PCH
, "intel,bd82x6x"),
75 COMPAT(COMPAT_INTEL_IRQ_ROUTER
, "intel,irq-router"),
76 COMPAT(ALTERA_SOCFPGA_DWMAC
, "altr,socfpga-stmmac"),
77 COMPAT(ALTERA_SOCFPGA_DWMMC
, "altr,socfpga-dw-mshc"),
78 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP
, "intel,baytrail-fsp"),
79 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP
, "intel,baytrail-fsp-mdp"),
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_fixed(const void *blob
, int node
,
90 const char *prop_name
, int index
, int na
, int ns
,
93 const fdt32_t
*prop
, *prop_end
;
94 const fdt32_t
*prop_addr
, *prop_size
, *prop_after_size
;
98 debug("%s: %s: ", __func__
, prop_name
);
100 if (na
> (sizeof(fdt_addr_t
) / sizeof(fdt32_t
))) {
101 debug("(na too large for fdt_addr_t type)\n");
102 return FDT_ADDR_T_NONE
;
105 if (ns
> (sizeof(fdt_size_t
) / sizeof(fdt32_t
))) {
106 debug("(ns too large for fdt_size_t type)\n");
107 return FDT_ADDR_T_NONE
;
110 prop
= fdt_getprop(blob
, node
, prop_name
, &len
);
112 debug("(not found)\n");
113 return FDT_ADDR_T_NONE
;
115 prop_end
= prop
+ (len
/ sizeof(*prop
));
117 prop_addr
= prop
+ (index
* (na
+ ns
));
118 prop_size
= prop_addr
+ na
;
119 prop_after_size
= prop_size
+ ns
;
120 if (prop_after_size
> prop_end
) {
121 debug("(not enough data: expected >= %d cells, got %d cells)\n",
122 (u32
)(prop_after_size
- prop
), ((u32
)(prop_end
- prop
)));
123 return FDT_ADDR_T_NONE
;
126 addr
= fdtdec_get_number(prop_addr
, na
);
129 *sizep
= fdtdec_get_number(prop_size
, ns
);
130 debug("addr=%08llx, size=%llx\n", (u64
)addr
, (u64
)*sizep
);
132 debug("addr=%08llx\n", (u64
)addr
);
138 fdt_addr_t
fdtdec_get_addr_size_auto_parent(const void *blob
, int parent
,
139 int node
, const char *prop_name
, int index
, fdt_size_t
*sizep
)
143 debug("%s: ", __func__
);
145 na
= fdt_address_cells(blob
, parent
);
147 debug("(bad #address-cells)\n");
148 return FDT_ADDR_T_NONE
;
151 ns
= fdt_size_cells(blob
, parent
);
153 debug("(bad #size-cells)\n");
154 return FDT_ADDR_T_NONE
;
157 debug("na=%d, ns=%d, ", na
, ns
);
159 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, index
, na
,
163 fdt_addr_t
fdtdec_get_addr_size_auto_noparent(const void *blob
, int node
,
164 const char *prop_name
, int index
, fdt_size_t
*sizep
)
168 debug("%s: ", __func__
);
170 parent
= fdt_parent_offset(blob
, node
);
172 debug("(no parent found)\n");
173 return FDT_ADDR_T_NONE
;
176 return fdtdec_get_addr_size_auto_parent(blob
, parent
, node
, prop_name
,
180 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
181 const char *prop_name
, fdt_size_t
*sizep
)
183 int ns
= sizep
? (sizeof(fdt_size_t
) / sizeof(fdt32_t
)) : 0;
185 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, 0,
186 sizeof(fdt_addr_t
) / sizeof(fdt32_t
),
190 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
191 const char *prop_name
)
193 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
197 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
198 const char *prop_name
, struct fdt_pci_addr
*addr
)
204 debug("%s: %s: ", __func__
, prop_name
);
207 * If we follow the pci bus bindings strictly, we should check
208 * the value of the node's parent node's #address-cells and
209 * #size-cells. They need to be 3 and 2 accordingly. However,
210 * for simplicity we skip the check here.
212 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
216 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
217 int num
= len
/ FDT_PCI_REG_SIZE
;
220 for (i
= 0; i
< num
; i
++) {
221 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
222 (ulong
)fdt32_to_cpu(cell
[0]),
223 (ulong
)fdt32_to_cpu(cell
[1]),
224 (ulong
)fdt32_to_cpu(cell
[2]));
225 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
226 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
227 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
228 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
231 cell
+= (FDT_PCI_ADDR_CELLS
+
247 debug("(not found)\n");
251 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
253 const char *list
, *end
;
256 list
= fdt_getprop(blob
, node
, "compatible", &len
);
265 if (len
>= strlen("pciVVVV,DDDD")) {
266 s
= strstr(list
, "pci");
269 * check if the string is something like pciVVVV,DDDD.RR
270 * or just pciVVVV,DDDD
272 if (s
&& s
[7] == ',' &&
273 (s
[12] == '.' || s
[12] == 0)) {
275 *vendor
= simple_strtol(s
, NULL
, 16);
278 *device
= simple_strtol(s
, NULL
, 16);
289 int fdtdec_get_pci_bdf(const void *blob
, int node
,
290 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
292 u16 dt_vendor
, dt_device
, vendor
, device
;
295 /* get vendor id & device id from the compatible string */
296 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
300 /* extract the bdf from fdt_pci_addr */
301 *bdf
= addr
->phys_hi
& 0xffff00;
303 /* read vendor id & device id based on bdf */
304 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
305 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
308 * Note there are two places in the device tree to fully describe
309 * a pci device: one is via compatible string with a format of
310 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
311 * the device node's reg address property. We read the vendor id
312 * and device id based on bdf and compare the values with the
313 * "VVVV,DDDD". If they are the same, then we are good to use bdf
314 * to read device's bar. But if they are different, we have to rely
315 * on the vendor id and device id extracted from the compatible
316 * string and locate the real bdf by pci_find_device(). This is
317 * because normally we may only know device's device number and
318 * function number when writing device tree. The bus number is
319 * dynamically assigned during the pci enumeration process.
321 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
322 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
330 int fdtdec_get_pci_bar32(const void *blob
, int node
,
331 struct fdt_pci_addr
*addr
, u32
*bar
)
337 /* get pci devices's bdf */
338 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
342 /* extract the bar number from fdt_pci_addr */
343 barnum
= addr
->phys_hi
& 0xff;
344 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
347 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
348 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
354 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
355 uint64_t default_val
)
357 const uint64_t *cell64
;
360 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
361 if (!cell64
|| length
< sizeof(*cell64
))
364 return fdt64_to_cpu(*cell64
);
367 int fdtdec_get_is_enabled(const void *blob
, int node
)
372 * It should say "okay", so only allow that. Some fdts use "ok" but
373 * this is a bug. Please fix your device tree source file. See here
376 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
378 cell
= fdt_getprop(blob
, node
, "status", NULL
);
380 return 0 == strcmp(cell
, "okay");
384 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
386 enum fdt_compat_id id
;
388 /* Search our drivers */
389 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
390 if (0 == fdt_node_check_compatible(blob
, node
,
393 return COMPAT_UNKNOWN
;
396 int fdtdec_next_compatible(const void *blob
, int node
,
397 enum fdt_compat_id id
)
399 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
402 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
403 enum fdt_compat_id id
, int *depthp
)
406 node
= fdt_next_node(blob
, node
, depthp
);
407 } while (*depthp
> 1);
409 /* If this is a direct subnode, and compatible, return it */
410 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
411 blob
, node
, compat_names
[id
]))
414 return -FDT_ERR_NOTFOUND
;
417 int fdtdec_next_alias(const void *blob
, const char *name
,
418 enum fdt_compat_id id
, int *upto
)
420 #define MAX_STR_LEN 20
421 char str
[MAX_STR_LEN
+ 20];
424 /* snprintf() is not available */
425 assert(strlen(name
) < MAX_STR_LEN
);
426 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
427 node
= fdt_path_offset(blob
, str
);
430 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
434 return -FDT_ERR_NOTFOUND
;
439 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
440 enum fdt_compat_id id
, int *node_list
, int maxcount
)
442 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
444 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
447 /* TODO: Can we tighten this code up a little? */
448 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
449 enum fdt_compat_id id
, int *node_list
, int maxcount
)
451 int name_len
= strlen(name
);
459 /* find the alias node if present */
460 alias_node
= fdt_path_offset(blob
, "/aliases");
463 * start with nothing, and we can assume that the root node can't
466 memset(nodes
, '\0', sizeof(nodes
));
468 /* First find all the compatible nodes */
469 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
470 node
= fdtdec_next_compatible(blob
, node
, id
);
472 nodes
[count
++] = node
;
475 debug("%s: warning: maxcount exceeded with alias '%s'\n",
478 /* Now find all the aliases */
479 for (offset
= fdt_first_property_offset(blob
, alias_node
);
481 offset
= fdt_next_property_offset(blob
, offset
)) {
482 const struct fdt_property
*prop
;
488 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
489 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
490 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
491 node
= fdt_path_offset(blob
, prop
->data
);
495 /* Get the alias number */
496 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
497 if (number
< 0 || number
>= maxcount
) {
498 debug("%s: warning: alias '%s' is out of range\n",
503 /* Make sure the node we found is actually in our list! */
505 for (j
= 0; j
< count
; j
++)
506 if (nodes
[j
] == node
) {
512 debug("%s: warning: alias '%s' points to a node "
513 "'%s' that is missing or is not compatible "
514 " with '%s'\n", __func__
, path
,
515 fdt_get_name(blob
, node
, NULL
),
521 * Add this node to our list in the right place, and mark
524 if (fdtdec_get_is_enabled(blob
, node
)) {
525 if (node_list
[number
]) {
526 debug("%s: warning: alias '%s' requires that "
527 "a node be placed in the list in a "
528 "position which is already filled by "
529 "node '%s'\n", __func__
, path
,
530 fdt_get_name(blob
, node
, NULL
));
533 node_list
[number
] = node
;
534 if (number
>= num_found
)
535 num_found
= number
+ 1;
540 /* Add any nodes not mentioned by an alias */
541 for (i
= j
= 0; i
< maxcount
; i
++) {
543 for (; j
< maxcount
; j
++)
545 fdtdec_get_is_enabled(blob
, nodes
[j
]))
548 /* Have we run out of nodes to add? */
552 assert(!node_list
[i
]);
553 node_list
[i
] = nodes
[j
++];
562 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
565 int base_len
= strlen(base
);
566 const char *find_name
;
571 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
572 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
574 aliases
= fdt_path_offset(blob
, "/aliases");
575 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
577 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
583 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
584 debug(" - %s, %s\n", name
, prop
);
585 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
586 strncmp(name
, base
, base_len
))
589 slash
= strrchr(prop
, '/');
590 if (strcmp(slash
+ 1, find_name
))
592 val
= trailing_strtol(name
);
595 debug("Found seq %d\n", *seqp
);
600 debug("Not found\n");
604 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
611 return -FDT_ERR_NOTFOUND
;
612 chosen_node
= fdt_path_offset(blob
, "/chosen");
613 prop
= fdt_getprop(blob
, chosen_node
, name
, &len
);
615 return -FDT_ERR_NOTFOUND
;
616 return fdt_path_offset(blob
, prop
);
619 int fdtdec_check_fdt(void)
622 * We must have an FDT, but we cannot panic() yet since the console
623 * is not ready. So for now, just assert(). Boards which need an early
624 * FDT (prior to console ready) will need to make their own
625 * arrangements and do their own checks.
627 assert(!fdtdec_prepare_fdt());
632 * This function is a little odd in that it accesses global data. At some
633 * point if the architecture board.c files merge this will make more sense.
634 * Even now, it is common code.
636 int fdtdec_prepare_fdt(void)
638 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
639 fdt_check_header(gd
->fdt_blob
)) {
640 #ifdef CONFIG_SPL_BUILD
641 puts("Missing DTB\n");
643 puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
646 printf("fdt_blob=%p\n", gd
->fdt_blob
);
647 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
657 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
662 debug("%s: %s\n", __func__
, prop_name
);
663 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
665 return -FDT_ERR_NOTFOUND
;
667 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
672 * Look up a property in a node and check that it has a minimum length.
674 * @param blob FDT blob
675 * @param node node to examine
676 * @param prop_name name of property to find
677 * @param min_len minimum property length in bytes
678 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
679 found, or -FDT_ERR_BADLAYOUT if not enough data
680 * @return pointer to cell, which is only valid if err == 0
682 static const void *get_prop_check_min_len(const void *blob
, int node
,
683 const char *prop_name
, int min_len
, int *err
)
688 debug("%s: %s\n", __func__
, prop_name
);
689 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
691 *err
= -FDT_ERR_NOTFOUND
;
692 else if (len
< min_len
)
693 *err
= -FDT_ERR_BADLAYOUT
;
699 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
700 u32
*array
, int count
)
705 debug("%s: %s\n", __func__
, prop_name
);
706 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
707 sizeof(u32
) * count
, &err
);
709 for (i
= 0; i
< count
; i
++)
710 array
[i
] = fdt32_to_cpu(cell
[i
]);
715 int fdtdec_get_int_array_count(const void *blob
, int node
,
716 const char *prop_name
, u32
*array
, int count
)
722 debug("%s: %s\n", __func__
, prop_name
);
723 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
725 return -FDT_ERR_NOTFOUND
;
726 elems
= len
/ sizeof(u32
);
729 for (i
= 0; i
< count
; i
++)
730 array
[i
] = fdt32_to_cpu(cell
[i
]);
735 const u32
*fdtdec_locate_array(const void *blob
, int node
,
736 const char *prop_name
, int count
)
741 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
742 sizeof(u32
) * count
, &err
);
743 return err
? NULL
: cell
;
746 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
751 debug("%s: %s\n", __func__
, prop_name
);
752 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
756 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
757 const char *list_name
,
758 const char *cells_name
,
759 int cell_count
, int index
,
760 struct fdtdec_phandle_args
*out_args
)
762 const __be32
*list
, *list_end
;
763 int rc
= 0, size
, cur_index
= 0;
768 /* Retrieve the phandle list property */
769 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
772 list_end
= list
+ size
/ sizeof(*list
);
774 /* Loop over the phandles until all the requested entry is found */
775 while (list
< list_end
) {
780 * If phandle is 0, then it is an empty entry with no
781 * arguments. Skip forward to the next entry.
783 phandle
= be32_to_cpup(list
++);
786 * Find the provider node and parse the #*-cells
787 * property to determine the argument length.
789 * This is not needed if the cell count is hard-coded
790 * (i.e. cells_name not set, but cell_count is set),
791 * except when we're going to return the found node
794 if (cells_name
|| cur_index
== index
) {
795 node
= fdt_node_offset_by_phandle(blob
,
798 debug("%s: could not find phandle\n",
799 fdt_get_name(blob
, src_node
,
806 count
= fdtdec_get_int(blob
, node
, cells_name
,
809 debug("%s: could not get %s for %s\n",
810 fdt_get_name(blob
, src_node
,
813 fdt_get_name(blob
, node
,
822 * Make sure that the arguments actually fit in the
823 * remaining property data length
825 if (list
+ count
> list_end
) {
826 debug("%s: arguments longer than property\n",
827 fdt_get_name(blob
, src_node
, NULL
));
833 * All of the error cases above bail out of the loop, so at
834 * this point, the parsing is successful. If the requested
835 * index matches, then fill the out_args structure and return,
836 * or return -ENOENT for an empty entry.
839 if (cur_index
== index
) {
846 if (count
> MAX_PHANDLE_ARGS
) {
847 debug("%s: too many arguments %d\n",
848 fdt_get_name(blob
, src_node
,
850 count
= MAX_PHANDLE_ARGS
;
852 out_args
->node
= node
;
853 out_args
->args_count
= count
;
854 for (i
= 0; i
< count
; i
++) {
856 be32_to_cpup(list
++);
860 /* Found it! return success */
870 * Result will be one of:
871 * -ENOENT : index is for empty phandle
872 * -EINVAL : parsing error on data
873 * [1..n] : Number of phandle (count mode; when index = -1)
875 rc
= index
< 0 ? cur_index
: -ENOENT
;
880 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
881 u8
*array
, int count
)
886 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
888 memcpy(array
, cell
, count
);
892 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
893 const char *prop_name
, int count
)
898 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
904 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
909 debug("%s: %s\n", __func__
, prop_name
);
910 config_node
= fdt_path_offset(blob
, "/config");
913 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
916 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
921 debug("%s: %s\n", __func__
, prop_name
);
922 config_node
= fdt_path_offset(blob
, "/config");
925 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
930 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
936 debug("%s: %s\n", __func__
, prop_name
);
937 nodeoffset
= fdt_path_offset(blob
, "/config");
941 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
945 return (char *)nodep
;
948 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
949 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
951 const fdt_addr_t
*cell
;
954 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
956 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
957 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
958 debug("cell=%p, len=%d\n", cell
, len
);
962 *basep
= fdt_addr_to_cpu(*cell
);
963 *sizep
= fdt_size_to_cpu(cell
[1]);
964 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
971 * Read a flash entry from the fdt
973 * @param blob FDT blob
974 * @param node Offset of node to read
975 * @param name Name of node being read
976 * @param entry Place to put offset and size of this node
977 * @return 0 if ok, -ve on error
979 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
980 struct fmap_entry
*entry
)
985 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
986 debug("Node '%s' has bad/missing 'reg' property\n", name
);
987 return -FDT_ERR_NOTFOUND
;
989 entry
->offset
= reg
[0];
990 entry
->length
= reg
[1];
991 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
992 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
993 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
994 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
995 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
996 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
997 entry
->hash
= (uint8_t *)prop
;
1002 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
1007 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
1012 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
1013 unsigned int index
, struct fdt_resource
*res
)
1015 const fdt32_t
*ptr
, *end
;
1016 int na
, ns
, len
, parent
;
1019 parent
= fdt_parent_offset(fdt
, node
);
1023 na
= fdt_address_cells(fdt
, parent
);
1024 ns
= fdt_size_cells(fdt
, parent
);
1026 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
1030 end
= ptr
+ len
/ sizeof(*ptr
);
1032 while (ptr
+ na
+ ns
<= end
) {
1034 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
1035 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
1043 return -FDT_ERR_NOTFOUND
;
1046 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
1047 const char *prop_names
, const char *name
,
1048 struct fdt_resource
*res
)
1052 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
1056 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1059 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1060 const char *mem_type
, const char *suffix
,
1061 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1065 fdt_size_t size
, offset_size
;
1066 fdt_addr_t base
, offset
;
1069 if (config_node
== -1) {
1070 config_node
= fdt_path_offset(blob
, "/config");
1071 if (config_node
< 0) {
1072 debug("%s: Cannot find /config node\n", __func__
);
1079 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1081 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1083 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1088 node
= fdt_path_offset(blob
, mem
);
1090 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1091 fdt_strerror(node
));
1096 * Not strictly correct - the memory may have multiple banks. We just
1099 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1100 debug("%s: Failed to decode memory region %s\n", __func__
,
1105 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1107 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1109 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1114 *basep
= base
+ offset
;
1115 *sizep
= offset_size
;
1120 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1121 struct timing_entry
*result
)
1123 int length
, ret
= 0;
1126 prop
= fdt_getprop(blob
, node
, name
, &length
);
1128 debug("%s: could not find property %s\n",
1129 fdt_get_name(blob
, node
, NULL
), name
);
1133 if (length
== sizeof(u32
)) {
1134 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1135 result
->min
= result
->typ
;
1136 result
->max
= result
->typ
;
1138 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1144 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1145 struct display_timing
*dt
)
1147 int i
, node
, timings_node
;
1151 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1152 if (timings_node
< 0)
1153 return timings_node
;
1155 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1156 node
> 0 && i
!= index
;
1157 node
= fdt_next_subnode(blob
, node
))
1163 memset(dt
, 0, sizeof(*dt
));
1165 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1167 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1169 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1170 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1171 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1173 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1175 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1176 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1177 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1181 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1183 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1184 DISPLAY_FLAGS_VSYNC_LOW
;
1186 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1188 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1189 DISPLAY_FLAGS_HSYNC_LOW
;
1191 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1193 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1194 DISPLAY_FLAGS_DE_LOW
;
1196 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1198 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1199 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1202 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1203 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1204 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1205 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1206 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1207 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1212 int fdtdec_setup(void)
1214 #if CONFIG_IS_ENABLED(OF_CONTROL)
1215 # ifdef CONFIG_OF_EMBED
1216 /* Get a pointer to the FDT */
1217 gd
->fdt_blob
= __dtb_dt_begin
;
1218 # elif defined CONFIG_OF_SEPARATE
1219 # ifdef CONFIG_SPL_BUILD
1220 /* FDT is at end of BSS */
1221 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1223 /* FDT is at end of image */
1224 gd
->fdt_blob
= (ulong
*)&_end
;
1226 # elif defined(CONFIG_OF_HOSTFILE)
1227 if (sandbox_read_fdt_from_file()) {
1228 puts("Failed to read control FDT\n");
1232 # ifndef CONFIG_SPL_BUILD
1233 /* Allow the early environment to override the fdt address */
1234 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1235 (uintptr_t)gd
->fdt_blob
);
1238 return fdtdec_prepare_fdt();
1241 #endif /* !USE_HOSTCC */