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>
12 #include <linux/libfdt.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 ofnode ofnode_get_parent(ofnode node)
172 assert(ofnode_valid(node));
173 if (ofnode_is_np(node))
174 parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
176 parent.of_offset = fdt_parent_offset(gd->fdt_blob,
177 ofnode_to_offset(node));
182 const char *ofnode_get_name(ofnode node)
184 assert(ofnode_valid(node));
185 if (ofnode_is_np(node))
186 return strrchr(node.np->full_name, '/') + 1;
188 return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
191 ofnode ofnode_get_by_phandle(uint phandle)
195 if (of_live_active())
196 node = np_to_ofnode(of_find_node_by_phandle(phandle));
198 node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
204 int ofnode_read_size(ofnode node, const char *propname)
208 if (ofnode_is_np(node)) {
209 struct property *prop = of_find_property(
210 ofnode_to_np(node), propname, NULL);
215 if (fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
223 fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
225 if (ofnode_is_np(node)) {
226 const __be32 *prop_val;
232 prop_val = of_get_address(ofnode_to_np(node), index, &size,
235 return FDT_ADDR_T_NONE;
237 ns = of_n_size_cells(ofnode_to_np(node));
239 if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
240 return of_translate_address(ofnode_to_np(node), prop_val);
242 na = of_n_addr_cells(ofnode_to_np(node));
243 return of_read_number(prop_val, na);
246 return fdt_get_base_address(gd->fdt_blob,
247 ofnode_to_offset(node));
250 return FDT_ADDR_T_NONE;
253 fdt_addr_t ofnode_get_addr(ofnode node)
255 return ofnode_get_addr_index(node, 0);
258 int ofnode_stringlist_search(ofnode node, const char *property,
261 if (ofnode_is_np(node)) {
262 return of_property_match_string(ofnode_to_np(node),
267 ret = fdt_stringlist_search(gd->fdt_blob,
268 ofnode_to_offset(node), property,
270 if (ret == -FDT_ERR_NOTFOUND)
279 int ofnode_read_string_index(ofnode node, const char *property, int index,
282 if (ofnode_is_np(node)) {
283 return of_property_read_string_index(ofnode_to_np(node),
284 property, index, outp);
288 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
289 property, index, &len);
296 int ofnode_read_string_count(ofnode node, const char *property)
298 if (ofnode_is_np(node)) {
299 return of_property_count_strings(ofnode_to_np(node), property);
301 return fdt_stringlist_count(gd->fdt_blob,
302 ofnode_to_offset(node), property);
306 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
307 struct ofnode_phandle_args *out)
309 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
310 out->node = offset_to_ofnode(in->node);
311 out->args_count = in->args_count;
312 memcpy(out->args, in->args, sizeof(out->args));
315 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
316 struct ofnode_phandle_args *out)
318 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
319 out->node = np_to_ofnode(in->np);
320 out->args_count = in->args_count;
321 memcpy(out->args, in->args, sizeof(out->args));
324 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
325 const char *cells_name, int cell_count,
327 struct ofnode_phandle_args *out_args)
329 if (ofnode_is_np(node)) {
330 struct of_phandle_args args;
333 ret = of_parse_phandle_with_args(ofnode_to_np(node),
334 list_name, cells_name, index,
338 ofnode_from_of_phandle_args(&args, out_args);
340 struct fdtdec_phandle_args args;
343 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
344 ofnode_to_offset(node),
345 list_name, cells_name,
346 cell_count, index, &args);
349 ofnode_from_fdtdec_phandle_args(&args, out_args);
355 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
356 const char *cells_name)
358 if (ofnode_is_np(node))
359 return of_count_phandle_with_args(ofnode_to_np(node),
360 list_name, cells_name);
362 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
363 ofnode_to_offset(node), list_name, cells_name,
367 ofnode ofnode_path(const char *path)
369 if (of_live_active())
370 return np_to_ofnode(of_find_node_by_path(path));
372 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
375 const char *ofnode_get_chosen_prop(const char *name)
379 chosen_node = ofnode_path("/chosen");
381 return ofnode_read_string(chosen_node, name);
384 ofnode ofnode_get_chosen_node(const char *name)
388 prop = ofnode_get_chosen_prop(name);
390 return ofnode_null();
392 return ofnode_path(prop);
395 static int decode_timing_property(ofnode node, const char *name,
396 struct timing_entry *result)
400 length = ofnode_read_size(node, name);
402 debug("%s: could not find property %s\n",
403 ofnode_get_name(node), name);
407 if (length == sizeof(u32)) {
408 result->typ = ofnode_read_u32_default(node, name, 0);
409 result->min = result->typ;
410 result->max = result->typ;
412 ret = ofnode_read_u32_array(node, name, &result->min, 3);
418 int ofnode_decode_display_timing(ofnode parent, int index,
419 struct display_timing *dt)
422 ofnode timings, node;
426 timings = ofnode_find_subnode(parent, "display-timings");
427 if (!ofnode_valid(timings))
431 ofnode_for_each_subnode(node, timings) {
436 if (!ofnode_valid(node))
439 memset(dt, 0, sizeof(*dt));
441 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
442 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
443 ret |= decode_timing_property(node, "hactive", &dt->hactive);
444 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
445 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
446 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
447 ret |= decode_timing_property(node, "vactive", &dt->vactive);
448 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
449 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
452 val = ofnode_read_u32_default(node, "vsync-active", -1);
454 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
455 DISPLAY_FLAGS_VSYNC_LOW;
457 val = ofnode_read_u32_default(node, "hsync-active", -1);
459 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
460 DISPLAY_FLAGS_HSYNC_LOW;
462 val = ofnode_read_u32_default(node, "de-active", -1);
464 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
465 DISPLAY_FLAGS_DE_LOW;
467 val = ofnode_read_u32_default(node, "pixelclk-active", -1);
469 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
470 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
473 if (ofnode_read_bool(node, "interlaced"))
474 dt->flags |= DISPLAY_FLAGS_INTERLACED;
475 if (ofnode_read_bool(node, "doublescan"))
476 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
477 if (ofnode_read_bool(node, "doubleclk"))
478 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
483 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
485 if (ofnode_is_np(node))
486 return of_get_property(ofnode_to_np(node), propname, lenp);
488 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
492 bool ofnode_is_available(ofnode node)
494 if (ofnode_is_np(node))
495 return of_device_is_available(ofnode_to_np(node));
497 return fdtdec_get_is_enabled(gd->fdt_blob,
498 ofnode_to_offset(node));
501 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
504 if (ofnode_is_np(node)) {
507 const struct device_node *np = ofnode_to_np(node);
508 const __be32 *prop = of_get_property(np, property, &psize);
511 return FDT_ADDR_T_NONE;
512 na = of_n_addr_cells(np);
513 ns = of_n_addr_cells(np);
514 *sizep = of_read_number(prop + na, ns);
515 return of_read_number(prop, na);
517 return fdtdec_get_addr_size(gd->fdt_blob,
518 ofnode_to_offset(node), property,
523 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
526 if (ofnode_is_np(node)) {
527 const struct device_node *np = ofnode_to_np(node);
529 const __be32 *prop = of_get_property(np, propname, &psize);
531 if (!prop || sz != psize)
533 return (uint8_t *)prop;
536 return fdtdec_locate_byte_array(gd->fdt_blob,
537 ofnode_to_offset(node), propname, sz);
541 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
542 const char *propname, struct fdt_pci_addr *addr)
548 debug("%s: %s: ", __func__, propname);
551 * If we follow the pci bus bindings strictly, we should check
552 * the value of the node's parent node's #address-cells and
553 * #size-cells. They need to be 3 and 2 accordingly. However,
554 * for simplicity we skip the check here.
556 cell = ofnode_get_property(node, propname, &len);
560 if ((len % FDT_PCI_REG_SIZE) == 0) {
561 int num = len / FDT_PCI_REG_SIZE;
564 for (i = 0; i < num; i++) {
565 debug("pci address #%d: %08lx %08lx %08lx\n", i,
566 (ulong)fdt32_to_cpu(cell[0]),
567 (ulong)fdt32_to_cpu(cell[1]),
568 (ulong)fdt32_to_cpu(cell[2]));
569 if ((fdt32_to_cpu(*cell) & type) == type) {
570 addr->phys_hi = fdt32_to_cpu(cell[0]);
571 addr->phys_mid = fdt32_to_cpu(cell[1]);
572 addr->phys_lo = fdt32_to_cpu(cell[1]);
576 cell += (FDT_PCI_ADDR_CELLS +
591 debug("(not found)\n");
595 int ofnode_read_addr_cells(ofnode node)
597 if (ofnode_is_np(node))
598 return of_n_addr_cells(ofnode_to_np(node));
599 else /* NOTE: this call should walk up the parent stack */
600 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
603 int ofnode_read_size_cells(ofnode node)
605 if (ofnode_is_np(node))
606 return of_n_size_cells(ofnode_to_np(node));
607 else /* NOTE: this call should walk up the parent stack */
608 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
611 int ofnode_read_simple_addr_cells(ofnode node)
613 if (ofnode_is_np(node))
614 return of_simple_addr_cells(ofnode_to_np(node));
616 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
619 int ofnode_read_simple_size_cells(ofnode node)
621 if (ofnode_is_np(node))
622 return of_simple_size_cells(ofnode_to_np(node));
624 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
627 bool ofnode_pre_reloc(ofnode node)
629 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
632 #ifdef CONFIG_TPL_BUILD
633 if (ofnode_read_bool(node, "u-boot,dm-tpl"))
635 #elif defined(CONFIG_SPL_BUILD)
636 if (ofnode_read_bool(node, "u-boot,dm-spl"))
640 * In regular builds individual spl and tpl handling both
641 * count as handled pre-relocation for later second init.
643 if (ofnode_read_bool(node, "u-boot,dm-spl") ||
644 ofnode_read_bool(node, "u-boot,dm-tpl"))
651 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
653 if (ofnode_is_np(node)) {
654 return of_address_to_resource(ofnode_to_np(node), index, res);
656 struct fdt_resource fres;
659 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
660 "reg", index, &fres);
663 memset(res, '\0', sizeof(*res));
664 res->start = fres.start;
671 int ofnode_read_resource_byname(ofnode node, const char *name,
672 struct resource *res)
676 index = ofnode_stringlist_search(node, "reg-names", name);
680 return ofnode_read_resource(node, index, res);
683 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
685 if (ofnode_is_np(node))
686 return of_translate_address(ofnode_to_np(node), in_addr);
688 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);