2 * Copyright (c) 2017 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <fdt_support.h>
13 #include <dm/of_access.h>
14 #include <dm/of_addr.h>
15 #include <dm/ofnode.h>
16 #include <linux/err.h>
17 #include <linux/ioport.h>
19 int ofnode_read_u32(ofnode node
, const char *propname
, u32
*outp
)
21 assert(ofnode_valid(node
));
22 debug("%s: %s: ", __func__
, propname
);
24 if (ofnode_is_np(node
)) {
25 return of_read_u32(ofnode_to_np(node
), propname
, outp
);
30 cell
= fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
32 if (!cell
|| len
< sizeof(int)) {
33 debug("(not found)\n");
36 *outp
= fdt32_to_cpu(cell
[0]);
38 debug("%#x (%d)\n", *outp
, *outp
);
43 int ofnode_read_u32_default(ofnode node
, const char *propname
, u32 def
)
45 assert(ofnode_valid(node
));
46 ofnode_read_u32(node
, propname
, &def
);
51 int ofnode_read_s32_default(ofnode node
, const char *propname
, s32 def
)
53 assert(ofnode_valid(node
));
54 ofnode_read_u32(node
, propname
, (u32
*)&def
);
59 bool ofnode_read_bool(ofnode node
, const char *propname
)
63 assert(ofnode_valid(node
));
64 debug("%s: %s: ", __func__
, propname
);
66 prop
= ofnode_get_property(node
, propname
, NULL
);
68 debug("%s\n", prop
? "true" : "false");
70 return prop
? true : false;
73 const char *ofnode_read_string(ofnode node
, const char *propname
)
75 const char *str
= NULL
;
78 assert(ofnode_valid(node
));
79 debug("%s: %s: ", __func__
, propname
);
81 if (ofnode_is_np(node
)) {
82 struct property
*prop
= of_find_property(
83 ofnode_to_np(node
), propname
, NULL
);
90 str
= fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
94 debug("<not found>\n");
97 if (strnlen(str
, len
) >= len
) {
106 ofnode
ofnode_find_subnode(ofnode node
, const char *subnode_name
)
110 assert(ofnode_valid(node
));
111 debug("%s: %s: ", __func__
, subnode_name
);
113 if (ofnode_is_np(node
)) {
114 const struct device_node
*np
= ofnode_to_np(node
);
116 for (np
= np
->child
; np
; np
= np
->sibling
) {
117 if (!strcmp(subnode_name
, np
->name
))
120 subnode
= np_to_ofnode(np
);
122 int ooffset
= fdt_subnode_offset(gd
->fdt_blob
,
123 ofnode_to_offset(node
), subnode_name
);
124 subnode
= offset_to_ofnode(ooffset
);
126 debug("%s\n", ofnode_valid(subnode
) ?
127 ofnode_get_name(subnode
) : "<none>");
132 int ofnode_read_u32_array(ofnode node
, const char *propname
,
133 u32
*out_values
, size_t sz
)
135 assert(ofnode_valid(node
));
136 debug("%s: %s: ", __func__
, propname
);
138 if (ofnode_is_np(node
)) {
139 return of_read_u32_array(ofnode_to_np(node
), propname
,
142 return fdtdec_get_int_array(gd
->fdt_blob
,
143 ofnode_to_offset(node
), propname
,
148 ofnode
ofnode_first_subnode(ofnode node
)
150 assert(ofnode_valid(node
));
151 if (ofnode_is_np(node
))
152 return np_to_ofnode(node
.np
->child
);
154 return offset_to_ofnode(
155 fdt_first_subnode(gd
->fdt_blob
, ofnode_to_offset(node
)));
158 ofnode
ofnode_next_subnode(ofnode node
)
160 assert(ofnode_valid(node
));
161 if (ofnode_is_np(node
))
162 return np_to_ofnode(node
.np
->sibling
);
164 return offset_to_ofnode(
165 fdt_next_subnode(gd
->fdt_blob
, ofnode_to_offset(node
)));
168 const char *ofnode_get_name(ofnode node
)
170 assert(ofnode_valid(node
));
171 if (ofnode_is_np(node
))
172 return strrchr(node
.np
->full_name
, '/') + 1;
174 return fdt_get_name(gd
->fdt_blob
, ofnode_to_offset(node
), NULL
);
177 int ofnode_read_size(ofnode node
, const char *propname
)
181 if (ofnode_is_np(node
)) {
182 struct property
*prop
= of_find_property(
183 ofnode_to_np(node
), propname
, NULL
);
188 if (fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
), propname
,
196 fdt_addr_t
ofnode_get_addr_index(ofnode node
, int index
)
198 if (ofnode_is_np(node
)) {
199 const __be32
*prop_val
;
204 prop_val
= of_get_address(ofnode_to_np(node
), index
, &size
,
207 return FDT_ADDR_T_NONE
;
208 na
= of_n_addr_cells(ofnode_to_np(node
));
209 return of_read_number(prop_val
, na
);
211 return fdt_get_base_address(gd
->fdt_blob
,
212 ofnode_to_offset(node
));
215 return FDT_ADDR_T_NONE
;
218 fdt_addr_t
ofnode_get_addr(ofnode node
)
220 return ofnode_get_addr_index(node
, 0);
223 int ofnode_stringlist_search(ofnode node
, const char *property
,
226 if (ofnode_is_np(node
)) {
227 return of_property_match_string(ofnode_to_np(node
),
232 ret
= fdt_stringlist_search(gd
->fdt_blob
,
233 ofnode_to_offset(node
), property
,
235 if (ret
== -FDT_ERR_NOTFOUND
)
244 int ofnode_read_string_index(ofnode node
, const char *property
, int index
,
247 if (ofnode_is_np(node
)) {
248 return of_property_read_string_index(ofnode_to_np(node
),
249 property
, index
, outp
);
253 *outp
= fdt_stringlist_get(gd
->fdt_blob
, ofnode_to_offset(node
),
254 property
, index
, &len
);
261 int ofnode_read_string_count(ofnode node
, const char *property
)
263 if (ofnode_is_np(node
)) {
264 return of_property_count_strings(ofnode_to_np(node
), property
);
266 return fdt_stringlist_count(gd
->fdt_blob
,
267 ofnode_to_offset(node
), property
);
271 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args
*in
,
272 struct ofnode_phandle_args
*out
)
274 assert(OF_MAX_PHANDLE_ARGS
== MAX_PHANDLE_ARGS
);
275 out
->node
= offset_to_ofnode(in
->node
);
276 out
->args_count
= in
->args_count
;
277 memcpy(out
->args
, in
->args
, sizeof(out
->args
));
280 static void ofnode_from_of_phandle_args(struct of_phandle_args
*in
,
281 struct ofnode_phandle_args
*out
)
283 assert(OF_MAX_PHANDLE_ARGS
== MAX_PHANDLE_ARGS
);
284 out
->node
= np_to_ofnode(in
->np
);
285 out
->args_count
= in
->args_count
;
286 memcpy(out
->args
, in
->args
, sizeof(out
->args
));
289 int ofnode_parse_phandle_with_args(ofnode node
, const char *list_name
,
290 const char *cells_name
, int cell_count
,
292 struct ofnode_phandle_args
*out_args
)
294 if (ofnode_is_np(node
)) {
295 struct of_phandle_args args
;
298 ret
= of_parse_phandle_with_args(ofnode_to_np(node
),
299 list_name
, cells_name
, index
, &args
);
302 ofnode_from_of_phandle_args(&args
, out_args
);
304 struct fdtdec_phandle_args args
;
307 ret
= fdtdec_parse_phandle_with_args(gd
->fdt_blob
,
308 ofnode_to_offset(node
), list_name
, cells_name
,
309 cell_count
, index
, &args
);
312 ofnode_from_fdtdec_phandle_args(&args
, out_args
);
318 int ofnode_count_phandle_with_args(ofnode node
, const char *list_name
,
319 const char *cells_name
)
321 if (ofnode_is_np(node
))
322 return of_count_phandle_with_args(ofnode_to_np(node
),
323 list_name
, cells_name
);
325 return fdtdec_parse_phandle_with_args(gd
->fdt_blob
,
326 ofnode_to_offset(node
), list_name
, cells_name
,
330 ofnode
ofnode_path(const char *path
)
332 if (of_live_active())
333 return np_to_ofnode(of_find_node_by_path(path
));
335 return offset_to_ofnode(fdt_path_offset(gd
->fdt_blob
, path
));
338 const char *ofnode_get_chosen_prop(const char *name
)
342 chosen_node
= ofnode_path("/chosen");
344 return ofnode_read_string(chosen_node
, name
);
347 ofnode
ofnode_get_chosen_node(const char *name
)
351 prop
= ofnode_get_chosen_prop(name
);
353 return ofnode_null();
355 return ofnode_path(prop
);
358 static int decode_timing_property(ofnode node
, const char *name
,
359 struct timing_entry
*result
)
363 length
= ofnode_read_size(node
, name
);
365 debug("%s: could not find property %s\n",
366 ofnode_get_name(node
), name
);
370 if (length
== sizeof(u32
)) {
371 result
->typ
= ofnode_read_u32_default(node
, name
, 0);
372 result
->min
= result
->typ
;
373 result
->max
= result
->typ
;
375 ret
= ofnode_read_u32_array(node
, name
, &result
->min
, 3);
381 int ofnode_decode_display_timing(ofnode parent
, int index
,
382 struct display_timing
*dt
)
385 ofnode timings
, node
;
389 timings
= ofnode_find_subnode(parent
, "display-timings");
390 if (!ofnode_valid(timings
))
394 ofnode_for_each_subnode(node
, timings
) {
399 if (!ofnode_valid(node
))
402 memset(dt
, 0, sizeof(*dt
));
404 ret
|= decode_timing_property(node
, "hback-porch", &dt
->hback_porch
);
405 ret
|= decode_timing_property(node
, "hfront-porch", &dt
->hfront_porch
);
406 ret
|= decode_timing_property(node
, "hactive", &dt
->hactive
);
407 ret
|= decode_timing_property(node
, "hsync-len", &dt
->hsync_len
);
408 ret
|= decode_timing_property(node
, "vback-porch", &dt
->vback_porch
);
409 ret
|= decode_timing_property(node
, "vfront-porch", &dt
->vfront_porch
);
410 ret
|= decode_timing_property(node
, "vactive", &dt
->vactive
);
411 ret
|= decode_timing_property(node
, "vsync-len", &dt
->vsync_len
);
412 ret
|= decode_timing_property(node
, "clock-frequency", &dt
->pixelclock
);
415 val
= ofnode_read_u32_default(node
, "vsync-active", -1);
417 dt
->flags
|= val
? DISPLAY_FLAGS_VSYNC_HIGH
:
418 DISPLAY_FLAGS_VSYNC_LOW
;
420 val
= ofnode_read_u32_default(node
, "hsync-active", -1);
422 dt
->flags
|= val
? DISPLAY_FLAGS_HSYNC_HIGH
:
423 DISPLAY_FLAGS_HSYNC_LOW
;
425 val
= ofnode_read_u32_default(node
, "de-active", -1);
427 dt
->flags
|= val
? DISPLAY_FLAGS_DE_HIGH
:
428 DISPLAY_FLAGS_DE_LOW
;
430 val
= ofnode_read_u32_default(node
, "pixelclk-active", -1);
432 dt
->flags
|= val
? DISPLAY_FLAGS_PIXDATA_POSEDGE
:
433 DISPLAY_FLAGS_PIXDATA_NEGEDGE
;
436 if (ofnode_read_bool(node
, "interlaced"))
437 dt
->flags
|= DISPLAY_FLAGS_INTERLACED
;
438 if (ofnode_read_bool(node
, "doublescan"))
439 dt
->flags
|= DISPLAY_FLAGS_DOUBLESCAN
;
440 if (ofnode_read_bool(node
, "doubleclk"))
441 dt
->flags
|= DISPLAY_FLAGS_DOUBLECLK
;
446 const void *ofnode_get_property(ofnode node
, const char *propname
, int *lenp
)
448 if (ofnode_is_np(node
))
449 return of_get_property(ofnode_to_np(node
), propname
, lenp
);
451 return fdt_getprop(gd
->fdt_blob
, ofnode_to_offset(node
),
455 bool ofnode_is_available(ofnode node
)
457 if (ofnode_is_np(node
))
458 return of_device_is_available(ofnode_to_np(node
));
460 return fdtdec_get_is_enabled(gd
->fdt_blob
,
461 ofnode_to_offset(node
));
464 fdt_addr_t
ofnode_get_addr_size(ofnode node
, const char *property
,
467 if (ofnode_is_np(node
)) {
470 const struct device_node
*np
= ofnode_to_np(node
);
471 const __be32
*prop
= of_get_property(np
, "reg", &psize
);
473 na
= of_n_addr_cells(np
);
474 ns
= of_n_addr_cells(np
);
475 *sizep
= of_read_number(prop
+ na
, ns
);
476 return of_read_number(prop
, na
);
478 return fdtdec_get_addr_size(gd
->fdt_blob
,
479 ofnode_to_offset(node
), property
,
484 const uint8_t *ofnode_read_u8_array_ptr(ofnode node
, const char *propname
,
487 if (ofnode_is_np(node
)) {
488 const struct device_node
*np
= ofnode_to_np(node
);
490 const __be32
*prop
= of_get_property(np
, propname
, &psize
);
492 if (!prop
|| sz
!= psize
)
494 return (uint8_t *)prop
;
497 return fdtdec_locate_byte_array(gd
->fdt_blob
,
498 ofnode_to_offset(node
), propname
, sz
);
502 int ofnode_read_pci_addr(ofnode node
, enum fdt_pci_space type
,
503 const char *propname
, struct fdt_pci_addr
*addr
)
509 debug("%s: %s: ", __func__
, propname
);
512 * If we follow the pci bus bindings strictly, we should check
513 * the value of the node's parent node's #address-cells and
514 * #size-cells. They need to be 3 and 2 accordingly. However,
515 * for simplicity we skip the check here.
517 cell
= ofnode_get_property(node
, propname
, &len
);
521 if ((len
% FDT_PCI_REG_SIZE
) == 0) {
522 int num
= len
/ FDT_PCI_REG_SIZE
;
525 for (i
= 0; i
< num
; i
++) {
526 debug("pci address #%d: %08lx %08lx %08lx\n", i
,
527 (ulong
)fdt32_to_cpu(cell
[0]),
528 (ulong
)fdt32_to_cpu(cell
[1]),
529 (ulong
)fdt32_to_cpu(cell
[2]));
530 if ((fdt32_to_cpu(*cell
) & type
) == type
) {
531 addr
->phys_hi
= fdt32_to_cpu(cell
[0]);
532 addr
->phys_mid
= fdt32_to_cpu(cell
[1]);
533 addr
->phys_lo
= fdt32_to_cpu(cell
[1]);
536 cell
+= (FDT_PCI_ADDR_CELLS
+
552 debug("(not found)\n");
556 int ofnode_read_addr_cells(ofnode node
)
558 if (ofnode_is_np(node
))
559 return of_n_addr_cells(ofnode_to_np(node
));
560 else /* NOTE: this call should walk up the parent stack */
561 return fdt_address_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
564 int ofnode_read_size_cells(ofnode node
)
566 if (ofnode_is_np(node
))
567 return of_n_size_cells(ofnode_to_np(node
));
568 else /* NOTE: this call should walk up the parent stack */
569 return fdt_size_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
572 int ofnode_read_simple_addr_cells(ofnode node
)
574 if (ofnode_is_np(node
))
575 return of_simple_addr_cells(ofnode_to_np(node
));
577 return fdt_address_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
580 int ofnode_read_simple_size_cells(ofnode node
)
582 if (ofnode_is_np(node
))
583 return of_simple_size_cells(ofnode_to_np(node
));
585 return fdt_size_cells(gd
->fdt_blob
, ofnode_to_offset(node
));
588 bool ofnode_pre_reloc(ofnode node
)
590 if (ofnode_read_bool(node
, "u-boot,dm-pre-reloc"))
593 #ifdef CONFIG_TPL_BUILD
594 if (ofnode_read_bool(node
, "u-boot,dm-tpl"))
596 #elif defined(CONFIG_SPL_BUILD)
597 if (ofnode_read_bool(node
, "u-boot,dm-spl"))
601 * In regular builds individual spl and tpl handling both
602 * count as handled pre-relocation for later second init.
604 if (ofnode_read_bool(node
, "u-boot,dm-spl") ||
605 ofnode_read_bool(node
, "u-boot,dm-tpl"))
612 int ofnode_read_resource(ofnode node
, uint index
, struct resource
*res
)
614 if (ofnode_is_np(node
)) {
615 return of_address_to_resource(ofnode_to_np(node
), index
, res
);
617 struct fdt_resource fres
;
620 ret
= fdt_get_resource(gd
->fdt_blob
, ofnode_to_offset(node
),
621 "reg", index
, &fres
);
624 memset(res
, '\0', sizeof(*res
));
625 res
->start
= fres
.start
;
632 int ofnode_read_resource_byname(ofnode node
, const char *name
,
633 struct resource
*res
)
637 index
= ofnode_stringlist_search(node
, "reg-names", name
);
641 return ofnode_read_resource(node
, index
, res
);