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_NAND
, "nvidia,tegra20-nand"),
28 COMPAT(NVIDIA_TEGRA20_PWM
, "nvidia,tegra20-pwm"),
29 COMPAT(NVIDIA_TEGRA124_DC
, "nvidia,tegra124-dc"),
30 COMPAT(NVIDIA_TEGRA124_SOR
, "nvidia,tegra124-sor"),
31 COMPAT(NVIDIA_TEGRA124_PMC
, "nvidia,tegra124-pmc"),
32 COMPAT(NVIDIA_TEGRA20_DC
, "nvidia,tegra20-dc"),
33 COMPAT(NVIDIA_TEGRA210_SDMMC
, "nvidia,tegra210-sdhci"),
34 COMPAT(NVIDIA_TEGRA124_SDMMC
, "nvidia,tegra124-sdhci"),
35 COMPAT(NVIDIA_TEGRA30_SDMMC
, "nvidia,tegra30-sdhci"),
36 COMPAT(NVIDIA_TEGRA20_SDMMC
, "nvidia,tegra20-sdhci"),
37 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL
, "nvidia,tegra124-xusb-padctl"),
38 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL
, "nvidia,tegra210-xusb-padctl"),
39 COMPAT(SMSC_LAN9215
, "smsc,lan9215"),
40 COMPAT(SAMSUNG_EXYNOS5_SROMC
, "samsung,exynos-sromc"),
41 COMPAT(SAMSUNG_S3C2440_I2C
, "samsung,s3c2440-i2c"),
42 COMPAT(SAMSUNG_EXYNOS5_SOUND
, "samsung,exynos-sound"),
43 COMPAT(WOLFSON_WM8994_CODEC
, "wolfson,wm8994-codec"),
44 COMPAT(GOOGLE_CROS_EC_KEYB
, "google,cros-ec-keyb"),
45 COMPAT(SAMSUNG_EXYNOS_USB_PHY
, "samsung,exynos-usb-phy"),
46 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY
, "samsung,exynos5250-usb3-phy"),
47 COMPAT(SAMSUNG_EXYNOS_TMU
, "samsung,exynos-tmu"),
48 COMPAT(SAMSUNG_EXYNOS_FIMD
, "samsung,exynos-fimd"),
49 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI
, "samsung,exynos-mipi-dsi"),
50 COMPAT(SAMSUNG_EXYNOS5_DP
, "samsung,exynos5-dp"),
51 COMPAT(SAMSUNG_EXYNOS_DWMMC
, "samsung,exynos-dwmmc"),
52 COMPAT(SAMSUNG_EXYNOS_MMC
, "samsung,exynos-mmc"),
53 COMPAT(SAMSUNG_EXYNOS_SERIAL
, "samsung,exynos4210-uart"),
54 COMPAT(MAXIM_MAX77686_PMIC
, "maxim,max77686"),
55 COMPAT(GENERIC_SPI_FLASH
, "spi-flash"),
56 COMPAT(MAXIM_98095_CODEC
, "maxim,max98095-codec"),
57 COMPAT(SAMSUNG_EXYNOS5_I2C
, "samsung,exynos5-hsi2c"),
58 COMPAT(SANDBOX_LCD_SDL
, "sandbox,lcd-sdl"),
59 COMPAT(SAMSUNG_EXYNOS_SYSMMU
, "samsung,sysmmu-v3.3"),
60 COMPAT(INTEL_MICROCODE
, "intel,microcode"),
61 COMPAT(MEMORY_SPD
, "memory-spd"),
62 COMPAT(INTEL_PANTHERPOINT_AHCI
, "intel,pantherpoint-ahci"),
63 COMPAT(INTEL_MODEL_206AX
, "intel,model-206ax"),
64 COMPAT(INTEL_GMA
, "intel,gma"),
65 COMPAT(AMS_AS3722
, "ams,as3722"),
66 COMPAT(INTEL_ICH_SPI
, "intel,ich-spi"),
67 COMPAT(INTEL_QRK_MRC
, "intel,quark-mrc"),
68 COMPAT(INTEL_X86_PINCTRL
, "intel,x86-pinctrl"),
69 COMPAT(SOCIONEXT_XHCI
, "socionext,uniphier-xhci"),
70 COMPAT(COMPAT_INTEL_PCH
, "intel,bd82x6x"),
71 COMPAT(COMPAT_INTEL_IRQ_ROUTER
, "intel,irq-router"),
72 COMPAT(ALTERA_SOCFPGA_DWMAC
, "altr,socfpga-stmmac"),
73 COMPAT(ALTERA_SOCFPGA_DWMMC
, "altr,socfpga-dw-mshc"),
74 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP
, "intel,baytrail-fsp"),
75 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP
, "intel,baytrail-fsp-mdp"),
78 const char *fdtdec_get_compatible(enum fdt_compat_id id
)
80 /* We allow reading of the 'unknown' ID for testing purposes */
81 assert(id
>= 0 && id
< COMPAT_COUNT
);
82 return compat_names
[id
];
85 fdt_addr_t
fdtdec_get_addr_size_fixed(const void *blob
, int node
,
86 const char *prop_name
, int index
, int na
, int ns
,
89 const fdt32_t
*prop
, *prop_end
;
90 const fdt32_t
*prop_addr
, *prop_size
, *prop_after_size
;
94 debug("%s: %s: ", __func__
, prop_name
);
96 if (na
> (sizeof(fdt_addr_t
) / sizeof(fdt32_t
))) {
97 debug("(na too large for fdt_addr_t type)\n");
98 return FDT_ADDR_T_NONE
;
101 if (ns
> (sizeof(fdt_size_t
) / sizeof(fdt32_t
))) {
102 debug("(ns too large for fdt_size_t type)\n");
103 return FDT_ADDR_T_NONE
;
106 prop
= fdt_getprop(blob
, node
, prop_name
, &len
);
108 debug("(not found)\n");
109 return FDT_ADDR_T_NONE
;
111 prop_end
= prop
+ (len
/ sizeof(*prop
));
113 prop_addr
= prop
+ (index
* (na
+ ns
));
114 prop_size
= prop_addr
+ na
;
115 prop_after_size
= prop_size
+ ns
;
116 if (prop_after_size
> prop_end
) {
117 debug("(not enough data: expected >= %d cells, got %d cells)\n",
118 (u32
)(prop_after_size
- prop
), ((u32
)(prop_end
- prop
)));
119 return FDT_ADDR_T_NONE
;
122 addr
= fdtdec_get_number(prop_addr
, na
);
125 *sizep
= fdtdec_get_number(prop_size
, ns
);
126 debug("addr=%08llx, size=%llx\n", (u64
)addr
, (u64
)*sizep
);
128 debug("addr=%08llx\n", (u64
)addr
);
134 fdt_addr_t
fdtdec_get_addr_size_auto_parent(const void *blob
, int parent
,
135 int node
, const char *prop_name
, int index
, fdt_size_t
*sizep
)
139 debug("%s: ", __func__
);
141 na
= fdt_address_cells(blob
, parent
);
143 debug("(bad #address-cells)\n");
144 return FDT_ADDR_T_NONE
;
147 ns
= fdt_size_cells(blob
, parent
);
149 debug("(bad #size-cells)\n");
150 return FDT_ADDR_T_NONE
;
153 debug("na=%d, ns=%d, ", na
, ns
);
155 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, index
, na
,
159 fdt_addr_t
fdtdec_get_addr_size_auto_noparent(const void *blob
, int node
,
160 const char *prop_name
, int index
, fdt_size_t
*sizep
)
164 debug("%s: ", __func__
);
166 parent
= fdt_parent_offset(blob
, node
);
168 debug("(no parent found)\n");
169 return FDT_ADDR_T_NONE
;
172 return fdtdec_get_addr_size_auto_parent(blob
, parent
, node
, prop_name
,
176 fdt_addr_t
fdtdec_get_addr_size(const void *blob
, int node
,
177 const char *prop_name
, fdt_size_t
*sizep
)
179 int ns
= sizep
? (sizeof(fdt_size_t
) / sizeof(fdt32_t
)) : 0;
181 return fdtdec_get_addr_size_fixed(blob
, node
, prop_name
, 0,
182 sizeof(fdt_addr_t
) / sizeof(fdt32_t
),
186 fdt_addr_t
fdtdec_get_addr(const void *blob
, int node
,
187 const char *prop_name
)
189 return fdtdec_get_addr_size(blob
, node
, prop_name
, NULL
);
193 int fdtdec_get_pci_addr(const void *blob
, int node
, enum fdt_pci_space type
,
194 const char *prop_name
, struct fdt_pci_addr
*addr
)
200 debug("%s: %s: ", __func__
, prop_name
);
203 * If we follow the pci bus bindings strictly, we should check
204 * the value of the node's parent node's #address-cells and
205 * #size-cells. They need to be 3 and 2 accordingly. However,
206 * for simplicity we skip the check here.
208 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
212 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
213 int num
= len
/ FDT_PCI_REG_SIZE
;
216 for (i
= 0; i
< num
; i
++) {
217 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
218 (ulong
)fdt32_to_cpu(cell
[0]),
219 (ulong
)fdt32_to_cpu(cell
[1]),
220 (ulong
)fdt32_to_cpu(cell
[2]));
221 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
222 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
223 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
224 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
227 cell
+= (FDT_PCI_ADDR_CELLS
+
243 debug("(not found)\n");
247 int fdtdec_get_pci_vendev(const void *blob
, int node
, u16
*vendor
, u16
*device
)
249 const char *list
, *end
;
252 list
= fdt_getprop(blob
, node
, "compatible", &len
);
261 if (len
>= strlen("pciVVVV,DDDD")) {
262 s
= strstr(list
, "pci");
265 * check if the string is something like pciVVVV,DDDD.RR
266 * or just pciVVVV,DDDD
268 if (s
&& s
[7] == ',' &&
269 (s
[12] == '.' || s
[12] == 0)) {
271 *vendor
= simple_strtol(s
, NULL
, 16);
274 *device
= simple_strtol(s
, NULL
, 16);
285 int fdtdec_get_pci_bdf(const void *blob
, int node
,
286 struct fdt_pci_addr
*addr
, pci_dev_t
*bdf
)
288 u16 dt_vendor
, dt_device
, vendor
, device
;
291 /* get vendor id & device id from the compatible string */
292 ret
= fdtdec_get_pci_vendev(blob
, node
, &dt_vendor
, &dt_device
);
296 /* extract the bdf from fdt_pci_addr */
297 *bdf
= addr
->phys_hi
& 0xffff00;
299 /* read vendor id & device id based on bdf */
300 pci_read_config_word(*bdf
, PCI_VENDOR_ID
, &vendor
);
301 pci_read_config_word(*bdf
, PCI_DEVICE_ID
, &device
);
304 * Note there are two places in the device tree to fully describe
305 * a pci device: one is via compatible string with a format of
306 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
307 * the device node's reg address property. We read the vendor id
308 * and device id based on bdf and compare the values with the
309 * "VVVV,DDDD". If they are the same, then we are good to use bdf
310 * to read device's bar. But if they are different, we have to rely
311 * on the vendor id and device id extracted from the compatible
312 * string and locate the real bdf by pci_find_device(). This is
313 * because normally we may only know device's device number and
314 * function number when writing device tree. The bus number is
315 * dynamically assigned during the pci enumeration process.
317 if ((dt_vendor
!= vendor
) || (dt_device
!= device
)) {
318 *bdf
= pci_find_device(dt_vendor
, dt_device
, 0);
326 int fdtdec_get_pci_bar32(const void *blob
, int node
,
327 struct fdt_pci_addr
*addr
, u32
*bar
)
333 /* get pci devices's bdf */
334 ret
= fdtdec_get_pci_bdf(blob
, node
, addr
, &bdf
);
338 /* extract the bar number from fdt_pci_addr */
339 barnum
= addr
->phys_hi
& 0xff;
340 if ((barnum
< PCI_BASE_ADDRESS_0
) || (barnum
> PCI_CARDBUS_CIS
))
343 barnum
= (barnum
- PCI_BASE_ADDRESS_0
) / 4;
344 *bar
= pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf
)), bdf
, barnum
);
350 uint64_t fdtdec_get_uint64(const void *blob
, int node
, const char *prop_name
,
351 uint64_t default_val
)
353 const uint64_t *cell64
;
356 cell64
= fdt_getprop(blob
, node
, prop_name
, &length
);
357 if (!cell64
|| length
< sizeof(*cell64
))
360 return fdt64_to_cpu(*cell64
);
363 int fdtdec_get_is_enabled(const void *blob
, int node
)
368 * It should say "okay", so only allow that. Some fdts use "ok" but
369 * this is a bug. Please fix your device tree source file. See here
372 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
374 cell
= fdt_getprop(blob
, node
, "status", NULL
);
376 return 0 == strcmp(cell
, "okay");
380 enum fdt_compat_id
fdtdec_lookup(const void *blob
, int node
)
382 enum fdt_compat_id id
;
384 /* Search our drivers */
385 for (id
= COMPAT_UNKNOWN
; id
< COMPAT_COUNT
; id
++)
386 if (0 == fdt_node_check_compatible(blob
, node
,
389 return COMPAT_UNKNOWN
;
392 int fdtdec_next_compatible(const void *blob
, int node
,
393 enum fdt_compat_id id
)
395 return fdt_node_offset_by_compatible(blob
, node
, compat_names
[id
]);
398 int fdtdec_next_compatible_subnode(const void *blob
, int node
,
399 enum fdt_compat_id id
, int *depthp
)
402 node
= fdt_next_node(blob
, node
, depthp
);
403 } while (*depthp
> 1);
405 /* If this is a direct subnode, and compatible, return it */
406 if (*depthp
== 1 && 0 == fdt_node_check_compatible(
407 blob
, node
, compat_names
[id
]))
410 return -FDT_ERR_NOTFOUND
;
413 int fdtdec_next_alias(const void *blob
, const char *name
,
414 enum fdt_compat_id id
, int *upto
)
416 #define MAX_STR_LEN 20
417 char str
[MAX_STR_LEN
+ 20];
420 /* snprintf() is not available */
421 assert(strlen(name
) < MAX_STR_LEN
);
422 sprintf(str
, "%.*s%d", MAX_STR_LEN
, name
, *upto
);
423 node
= fdt_path_offset(blob
, str
);
426 err
= fdt_node_check_compatible(blob
, node
, compat_names
[id
]);
430 return -FDT_ERR_NOTFOUND
;
435 int fdtdec_find_aliases_for_id(const void *blob
, const char *name
,
436 enum fdt_compat_id id
, int *node_list
, int maxcount
)
438 memset(node_list
, '\0', sizeof(*node_list
) * maxcount
);
440 return fdtdec_add_aliases_for_id(blob
, name
, id
, node_list
, maxcount
);
443 /* TODO: Can we tighten this code up a little? */
444 int fdtdec_add_aliases_for_id(const void *blob
, const char *name
,
445 enum fdt_compat_id id
, int *node_list
, int maxcount
)
447 int name_len
= strlen(name
);
455 /* find the alias node if present */
456 alias_node
= fdt_path_offset(blob
, "/aliases");
459 * start with nothing, and we can assume that the root node can't
462 memset(nodes
, '\0', sizeof(nodes
));
464 /* First find all the compatible nodes */
465 for (node
= count
= 0; node
>= 0 && count
< maxcount
;) {
466 node
= fdtdec_next_compatible(blob
, node
, id
);
468 nodes
[count
++] = node
;
471 debug("%s: warning: maxcount exceeded with alias '%s'\n",
474 /* Now find all the aliases */
475 for (offset
= fdt_first_property_offset(blob
, alias_node
);
477 offset
= fdt_next_property_offset(blob
, offset
)) {
478 const struct fdt_property
*prop
;
484 prop
= fdt_get_property_by_offset(blob
, offset
, NULL
);
485 path
= fdt_string(blob
, fdt32_to_cpu(prop
->nameoff
));
486 if (prop
->len
&& 0 == strncmp(path
, name
, name_len
))
487 node
= fdt_path_offset(blob
, prop
->data
);
491 /* Get the alias number */
492 number
= simple_strtoul(path
+ name_len
, NULL
, 10);
493 if (number
< 0 || number
>= maxcount
) {
494 debug("%s: warning: alias '%s' is out of range\n",
499 /* Make sure the node we found is actually in our list! */
501 for (j
= 0; j
< count
; j
++)
502 if (nodes
[j
] == node
) {
508 debug("%s: warning: alias '%s' points to a node "
509 "'%s' that is missing or is not compatible "
510 " with '%s'\n", __func__
, path
,
511 fdt_get_name(blob
, node
, NULL
),
517 * Add this node to our list in the right place, and mark
520 if (fdtdec_get_is_enabled(blob
, node
)) {
521 if (node_list
[number
]) {
522 debug("%s: warning: alias '%s' requires that "
523 "a node be placed in the list in a "
524 "position which is already filled by "
525 "node '%s'\n", __func__
, path
,
526 fdt_get_name(blob
, node
, NULL
));
529 node_list
[number
] = node
;
530 if (number
>= num_found
)
531 num_found
= number
+ 1;
536 /* Add any nodes not mentioned by an alias */
537 for (i
= j
= 0; i
< maxcount
; i
++) {
539 for (; j
< maxcount
; j
++)
541 fdtdec_get_is_enabled(blob
, nodes
[j
]))
544 /* Have we run out of nodes to add? */
548 assert(!node_list
[i
]);
549 node_list
[i
] = nodes
[j
++];
558 int fdtdec_get_alias_seq(const void *blob
, const char *base
, int offset
,
561 int base_len
= strlen(base
);
562 const char *find_name
;
567 find_name
= fdt_get_name(blob
, offset
, &find_namelen
);
568 debug("Looking for '%s' at %d, name %s\n", base
, offset
, find_name
);
570 aliases
= fdt_path_offset(blob
, "/aliases");
571 for (prop_offset
= fdt_first_property_offset(blob
, aliases
);
573 prop_offset
= fdt_next_property_offset(blob
, prop_offset
)) {
579 prop
= fdt_getprop_by_offset(blob
, prop_offset
, &name
, &len
);
580 debug(" - %s, %s\n", name
, prop
);
581 if (len
< find_namelen
|| *prop
!= '/' || prop
[len
- 1] ||
582 strncmp(name
, base
, base_len
))
585 slash
= strrchr(prop
, '/');
586 if (strcmp(slash
+ 1, find_name
))
588 val
= trailing_strtol(name
);
591 debug("Found seq %d\n", *seqp
);
596 debug("Not found\n");
600 const char *fdtdec_get_chosen_prop(const void *blob
, const char *name
)
606 chosen_node
= fdt_path_offset(blob
, "/chosen");
607 return fdt_getprop(blob
, chosen_node
, name
, NULL
);
610 int fdtdec_get_chosen_node(const void *blob
, const char *name
)
614 prop
= fdtdec_get_chosen_prop(blob
, name
);
616 return -FDT_ERR_NOTFOUND
;
617 return fdt_path_offset(blob
, prop
);
620 int fdtdec_check_fdt(void)
623 * We must have an FDT, but we cannot panic() yet since the console
624 * is not ready. So for now, just assert(). Boards which need an early
625 * FDT (prior to console ready) will need to make their own
626 * arrangements and do their own checks.
628 assert(!fdtdec_prepare_fdt());
633 * This function is a little odd in that it accesses global data. At some
634 * point if the architecture board.c files merge this will make more sense.
635 * Even now, it is common code.
637 int fdtdec_prepare_fdt(void)
639 if (!gd
->fdt_blob
|| ((uintptr_t)gd
->fdt_blob
& 3) ||
640 fdt_check_header(gd
->fdt_blob
)) {
641 #ifdef CONFIG_SPL_BUILD
642 puts("Missing DTB\n");
644 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");
647 printf("fdt_blob=%p\n", gd
->fdt_blob
);
648 print_buffer((ulong
)gd
->fdt_blob
, gd
->fdt_blob
, 4,
658 int fdtdec_lookup_phandle(const void *blob
, int node
, const char *prop_name
)
663 debug("%s: %s\n", __func__
, prop_name
);
664 phandle
= fdt_getprop(blob
, node
, prop_name
, NULL
);
666 return -FDT_ERR_NOTFOUND
;
668 lookup
= fdt_node_offset_by_phandle(blob
, fdt32_to_cpu(*phandle
));
673 * Look up a property in a node and check that it has a minimum length.
675 * @param blob FDT blob
676 * @param node node to examine
677 * @param prop_name name of property to find
678 * @param min_len minimum property length in bytes
679 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
680 found, or -FDT_ERR_BADLAYOUT if not enough data
681 * @return pointer to cell, which is only valid if err == 0
683 static const void *get_prop_check_min_len(const void *blob
, int node
,
684 const char *prop_name
, int min_len
, int *err
)
689 debug("%s: %s\n", __func__
, prop_name
);
690 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
692 *err
= -FDT_ERR_NOTFOUND
;
693 else if (len
< min_len
)
694 *err
= -FDT_ERR_BADLAYOUT
;
700 int fdtdec_get_int_array(const void *blob
, int node
, const char *prop_name
,
701 u32
*array
, int count
)
706 debug("%s: %s\n", __func__
, prop_name
);
707 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
708 sizeof(u32
) * count
, &err
);
710 for (i
= 0; i
< count
; i
++)
711 array
[i
] = fdt32_to_cpu(cell
[i
]);
716 int fdtdec_get_int_array_count(const void *blob
, int node
,
717 const char *prop_name
, u32
*array
, int count
)
723 debug("%s: %s\n", __func__
, prop_name
);
724 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
726 return -FDT_ERR_NOTFOUND
;
727 elems
= len
/ sizeof(u32
);
730 for (i
= 0; i
< count
; i
++)
731 array
[i
] = fdt32_to_cpu(cell
[i
]);
736 const u32
*fdtdec_locate_array(const void *blob
, int node
,
737 const char *prop_name
, int count
)
742 cell
= get_prop_check_min_len(blob
, node
, prop_name
,
743 sizeof(u32
) * count
, &err
);
744 return err
? NULL
: cell
;
747 int fdtdec_get_bool(const void *blob
, int node
, const char *prop_name
)
752 debug("%s: %s\n", __func__
, prop_name
);
753 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
757 int fdtdec_parse_phandle_with_args(const void *blob
, int src_node
,
758 const char *list_name
,
759 const char *cells_name
,
760 int cell_count
, int index
,
761 struct fdtdec_phandle_args
*out_args
)
763 const __be32
*list
, *list_end
;
764 int rc
= 0, size
, cur_index
= 0;
769 /* Retrieve the phandle list property */
770 list
= fdt_getprop(blob
, src_node
, list_name
, &size
);
773 list_end
= list
+ size
/ sizeof(*list
);
775 /* Loop over the phandles until all the requested entry is found */
776 while (list
< list_end
) {
781 * If phandle is 0, then it is an empty entry with no
782 * arguments. Skip forward to the next entry.
784 phandle
= be32_to_cpup(list
++);
787 * Find the provider node and parse the #*-cells
788 * property to determine the argument length.
790 * This is not needed if the cell count is hard-coded
791 * (i.e. cells_name not set, but cell_count is set),
792 * except when we're going to return the found node
795 if (cells_name
|| cur_index
== index
) {
796 node
= fdt_node_offset_by_phandle(blob
,
799 debug("%s: could not find phandle\n",
800 fdt_get_name(blob
, src_node
,
807 count
= fdtdec_get_int(blob
, node
, cells_name
,
810 debug("%s: could not get %s for %s\n",
811 fdt_get_name(blob
, src_node
,
814 fdt_get_name(blob
, node
,
823 * Make sure that the arguments actually fit in the
824 * remaining property data length
826 if (list
+ count
> list_end
) {
827 debug("%s: arguments longer than property\n",
828 fdt_get_name(blob
, src_node
, NULL
));
834 * All of the error cases above bail out of the loop, so at
835 * this point, the parsing is successful. If the requested
836 * index matches, then fill the out_args structure and return,
837 * or return -ENOENT for an empty entry.
840 if (cur_index
== index
) {
847 if (count
> MAX_PHANDLE_ARGS
) {
848 debug("%s: too many arguments %d\n",
849 fdt_get_name(blob
, src_node
,
851 count
= MAX_PHANDLE_ARGS
;
853 out_args
->node
= node
;
854 out_args
->args_count
= count
;
855 for (i
= 0; i
< count
; i
++) {
857 be32_to_cpup(list
++);
861 /* Found it! return success */
871 * Result will be one of:
872 * -ENOENT : index is for empty phandle
873 * -EINVAL : parsing error on data
874 * [1..n] : Number of phandle (count mode; when index = -1)
876 rc
= index
< 0 ? cur_index
: -ENOENT
;
881 int fdtdec_get_byte_array(const void *blob
, int node
, const char *prop_name
,
882 u8
*array
, int count
)
887 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
889 memcpy(array
, cell
, count
);
893 const u8
*fdtdec_locate_byte_array(const void *blob
, int node
,
894 const char *prop_name
, int count
)
899 cell
= get_prop_check_min_len(blob
, node
, prop_name
, count
, &err
);
905 int fdtdec_get_config_int(const void *blob
, const char *prop_name
,
910 debug("%s: %s\n", __func__
, prop_name
);
911 config_node
= fdt_path_offset(blob
, "/config");
914 return fdtdec_get_int(blob
, config_node
, prop_name
, default_val
);
917 int fdtdec_get_config_bool(const void *blob
, const char *prop_name
)
922 debug("%s: %s\n", __func__
, prop_name
);
923 config_node
= fdt_path_offset(blob
, "/config");
926 prop
= fdt_get_property(blob
, config_node
, prop_name
, NULL
);
931 char *fdtdec_get_config_string(const void *blob
, const char *prop_name
)
937 debug("%s: %s\n", __func__
, prop_name
);
938 nodeoffset
= fdt_path_offset(blob
, "/config");
942 nodep
= fdt_getprop(blob
, nodeoffset
, prop_name
, &len
);
946 return (char *)nodep
;
949 int fdtdec_decode_region(const void *blob
, int node
, const char *prop_name
,
950 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
952 const fdt_addr_t
*cell
;
955 debug("%s: %s: %s\n", __func__
, fdt_get_name(blob
, node
, NULL
),
957 cell
= fdt_getprop(blob
, node
, prop_name
, &len
);
958 if (!cell
|| (len
< sizeof(fdt_addr_t
) * 2)) {
959 debug("cell=%p, len=%d\n", cell
, len
);
963 *basep
= fdt_addr_to_cpu(*cell
);
964 *sizep
= fdt_size_to_cpu(cell
[1]);
965 debug("%s: base=%08lx, size=%lx\n", __func__
, (ulong
)*basep
,
972 * Read a flash entry from the fdt
974 * @param blob FDT blob
975 * @param node Offset of node to read
976 * @param name Name of node being read
977 * @param entry Place to put offset and size of this node
978 * @return 0 if ok, -ve on error
980 int fdtdec_read_fmap_entry(const void *blob
, int node
, const char *name
,
981 struct fmap_entry
*entry
)
986 if (fdtdec_get_int_array(blob
, node
, "reg", reg
, 2)) {
987 debug("Node '%s' has bad/missing 'reg' property\n", name
);
988 return -FDT_ERR_NOTFOUND
;
990 entry
->offset
= reg
[0];
991 entry
->length
= reg
[1];
992 entry
->used
= fdtdec_get_int(blob
, node
, "used", entry
->length
);
993 prop
= fdt_getprop(blob
, node
, "compress", NULL
);
994 entry
->compress_algo
= prop
&& !strcmp(prop
, "lzo") ?
995 FMAP_COMPRESS_LZO
: FMAP_COMPRESS_NONE
;
996 prop
= fdt_getprop(blob
, node
, "hash", &entry
->hash_size
);
997 entry
->hash_algo
= prop
? FMAP_HASH_SHA256
: FMAP_HASH_NONE
;
998 entry
->hash
= (uint8_t *)prop
;
1003 u64
fdtdec_get_number(const fdt32_t
*ptr
, unsigned int cells
)
1008 number
= (number
<< 32) | fdt32_to_cpu(*ptr
++);
1013 int fdt_get_resource(const void *fdt
, int node
, const char *property
,
1014 unsigned int index
, struct fdt_resource
*res
)
1016 const fdt32_t
*ptr
, *end
;
1017 int na
, ns
, len
, parent
;
1020 parent
= fdt_parent_offset(fdt
, node
);
1024 na
= fdt_address_cells(fdt
, parent
);
1025 ns
= fdt_size_cells(fdt
, parent
);
1027 ptr
= fdt_getprop(fdt
, node
, property
, &len
);
1031 end
= ptr
+ len
/ sizeof(*ptr
);
1033 while (ptr
+ na
+ ns
<= end
) {
1035 res
->start
= res
->end
= fdtdec_get_number(ptr
, na
);
1036 res
->end
+= fdtdec_get_number(&ptr
[na
], ns
) - 1;
1044 return -FDT_ERR_NOTFOUND
;
1047 int fdt_get_named_resource(const void *fdt
, int node
, const char *property
,
1048 const char *prop_names
, const char *name
,
1049 struct fdt_resource
*res
)
1053 index
= fdt_find_string(fdt
, node
, prop_names
, name
);
1057 return fdt_get_resource(fdt
, node
, property
, index
, res
);
1060 int fdtdec_decode_memory_region(const void *blob
, int config_node
,
1061 const char *mem_type
, const char *suffix
,
1062 fdt_addr_t
*basep
, fdt_size_t
*sizep
)
1066 fdt_size_t size
, offset_size
;
1067 fdt_addr_t base
, offset
;
1070 if (config_node
== -1) {
1071 config_node
= fdt_path_offset(blob
, "/config");
1072 if (config_node
< 0) {
1073 debug("%s: Cannot find /config node\n", __func__
);
1080 snprintf(prop_name
, sizeof(prop_name
), "%s-memory%s", mem_type
,
1082 mem
= fdt_getprop(blob
, config_node
, prop_name
, NULL
);
1084 debug("%s: No memory type for '%s', using /memory\n", __func__
,
1089 node
= fdt_path_offset(blob
, mem
);
1091 debug("%s: Failed to find node '%s': %s\n", __func__
, mem
,
1092 fdt_strerror(node
));
1097 * Not strictly correct - the memory may have multiple banks. We just
1100 if (fdtdec_decode_region(blob
, node
, "reg", &base
, &size
)) {
1101 debug("%s: Failed to decode memory region %s\n", __func__
,
1106 snprintf(prop_name
, sizeof(prop_name
), "%s-offset%s", mem_type
,
1108 if (fdtdec_decode_region(blob
, config_node
, prop_name
, &offset
,
1110 debug("%s: Failed to decode memory region '%s'\n", __func__
,
1115 *basep
= base
+ offset
;
1116 *sizep
= offset_size
;
1121 static int decode_timing_property(const void *blob
, int node
, const char *name
,
1122 struct timing_entry
*result
)
1124 int length
, ret
= 0;
1127 prop
= fdt_getprop(blob
, node
, name
, &length
);
1129 debug("%s: could not find property %s\n",
1130 fdt_get_name(blob
, node
, NULL
), name
);
1134 if (length
== sizeof(u32
)) {
1135 result
->typ
= fdtdec_get_int(blob
, node
, name
, 0);
1136 result
->min
= result
->typ
;
1137 result
->max
= result
->typ
;
1139 ret
= fdtdec_get_int_array(blob
, node
, name
, &result
->min
, 3);
1145 int fdtdec_decode_display_timing(const void *blob
, int parent
, int index
,
1146 struct display_timing
*dt
)
1148 int i
, node
, timings_node
;
1152 timings_node
= fdt_subnode_offset(blob
, parent
, "display-timings");
1153 if (timings_node
< 0)
1154 return timings_node
;
1156 for (i
= 0, node
= fdt_first_subnode(blob
, timings_node
);
1157 node
> 0 && i
!= index
;
1158 node
= fdt_next_subnode(blob
, node
))
1164 memset(dt
, 0, sizeof(*dt
));
1166 ret
|= decode_timing_property(blob
, node
, "hback-porch",
1168 ret
|= decode_timing_property(blob
, node
, "hfront-porch",
1170 ret
|= decode_timing_property(blob
, node
, "hactive", &dt
->hactive
);
1171 ret
|= decode_timing_property(blob
, node
, "hsync-len", &dt
->hsync_len
);
1172 ret
|= decode_timing_property(blob
, node
, "vback-porch",
1174 ret
|= decode_timing_property(blob
, node
, "vfront-porch",
1176 ret
|= decode_timing_property(blob
, node
, "vactive", &dt
->vactive
);
1177 ret
|= decode_timing_property(blob
, node
, "vsync-len", &dt
->vsync_len
);
1178 ret
|= decode_timing_property(blob
, node
, "clock-frequency",
1182 val
= fdtdec_get_int(blob
, node
, "vsync-active", -1);
1184 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
1185 DISPLAY_FLAGS_VSYNC_LOW
;
1187 val
= fdtdec_get_int(blob
, node
, "hsync-active", -1);
1189 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
1190 DISPLAY_FLAGS_HSYNC_LOW
;
1192 val
= fdtdec_get_int(blob
, node
, "de-active", -1);
1194 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
1195 DISPLAY_FLAGS_DE_LOW
;
1197 val
= fdtdec_get_int(blob
, node
, "pixelclk-active", -1);
1199 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
1200 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
1203 if (fdtdec_get_bool(blob
, node
, "interlaced"))
1204 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
1205 if (fdtdec_get_bool(blob
, node
, "doublescan"))
1206 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
1207 if (fdtdec_get_bool(blob
, node
, "doubleclk"))
1208 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
1213 int fdtdec_setup(void)
1215 #if CONFIG_IS_ENABLED(OF_CONTROL)
1216 # ifdef CONFIG_OF_EMBED
1217 /* Get a pointer to the FDT */
1218 gd
->fdt_blob
= __dtb_dt_begin
;
1219 # elif defined CONFIG_OF_SEPARATE
1220 # ifdef CONFIG_SPL_BUILD
1221 /* FDT is at end of BSS unless it is in a different memory region */
1222 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS
))
1223 gd
->fdt_blob
= (ulong
*)&_image_binary_end
;
1225 gd
->fdt_blob
= (ulong
*)&__bss_end
;
1227 /* FDT is at end of image */
1228 gd
->fdt_blob
= (ulong
*)&_end
;
1230 # elif defined(CONFIG_OF_HOSTFILE)
1231 if (sandbox_read_fdt_from_file()) {
1232 puts("Failed to read control FDT\n");
1236 # ifndef CONFIG_SPL_BUILD
1237 /* Allow the early environment to override the fdt address */
1238 gd
->fdt_blob
= (void *)getenv_ulong("fdtcontroladdr", 16,
1239 (uintptr_t)gd
->fdt_blob
);
1242 return fdtdec_prepare_fdt();
1245 #endif /* !USE_HOSTCC */