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;
209 if (IS_ENABLED(CONFIG_OF_TRANSLATE)) {
210 return of_translate_address(ofnode_to_np(node), prop_val);
212 na = of_n_addr_cells(ofnode_to_np(node));
213 return of_read_number(prop_val, na);
216 return fdt_get_base_address(gd->fdt_blob,
217 ofnode_to_offset(node));
220 return FDT_ADDR_T_NONE;
223 fdt_addr_t ofnode_get_addr(ofnode node)
225 return ofnode_get_addr_index(node, 0);
228 int ofnode_stringlist_search(ofnode node, const char *property,
231 if (ofnode_is_np(node)) {
232 return of_property_match_string(ofnode_to_np(node),
237 ret = fdt_stringlist_search(gd->fdt_blob,
238 ofnode_to_offset(node), property,
240 if (ret == -FDT_ERR_NOTFOUND)
249 int ofnode_read_string_index(ofnode node, const char *property, int index,
252 if (ofnode_is_np(node)) {
253 return of_property_read_string_index(ofnode_to_np(node),
254 property, index, outp);
258 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
259 property, index, &len);
266 int ofnode_read_string_count(ofnode node, const char *property)
268 if (ofnode_is_np(node)) {
269 return of_property_count_strings(ofnode_to_np(node), property);
271 return fdt_stringlist_count(gd->fdt_blob,
272 ofnode_to_offset(node), property);
276 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
277 struct ofnode_phandle_args *out)
279 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
280 out->node = offset_to_ofnode(in->node);
281 out->args_count = in->args_count;
282 memcpy(out->args, in->args, sizeof(out->args));
285 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
286 struct ofnode_phandle_args *out)
288 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
289 out->node = np_to_ofnode(in->np);
290 out->args_count = in->args_count;
291 memcpy(out->args, in->args, sizeof(out->args));
294 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
295 const char *cells_name, int cell_count,
297 struct ofnode_phandle_args *out_args)
299 if (ofnode_is_np(node)) {
300 struct of_phandle_args args;
303 ret = of_parse_phandle_with_args(ofnode_to_np(node),
304 list_name, cells_name, index,
308 ofnode_from_of_phandle_args(&args, out_args);
310 struct fdtdec_phandle_args args;
313 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
314 ofnode_to_offset(node),
315 list_name, cells_name,
316 cell_count, index, &args);
319 ofnode_from_fdtdec_phandle_args(&args, out_args);
325 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
326 const char *cells_name)
328 if (ofnode_is_np(node))
329 return of_count_phandle_with_args(ofnode_to_np(node),
330 list_name, cells_name);
332 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
333 ofnode_to_offset(node), list_name, cells_name,
337 ofnode ofnode_path(const char *path)
339 if (of_live_active())
340 return np_to_ofnode(of_find_node_by_path(path));
342 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
345 const char *ofnode_get_chosen_prop(const char *name)
349 chosen_node = ofnode_path("/chosen");
351 return ofnode_read_string(chosen_node, name);
354 ofnode ofnode_get_chosen_node(const char *name)
358 prop = ofnode_get_chosen_prop(name);
360 return ofnode_null();
362 return ofnode_path(prop);
365 static int decode_timing_property(ofnode node, const char *name,
366 struct timing_entry *result)
370 length = ofnode_read_size(node, name);
372 debug("%s: could not find property %s\n",
373 ofnode_get_name(node), name);
377 if (length == sizeof(u32)) {
378 result->typ = ofnode_read_u32_default(node, name, 0);
379 result->min = result->typ;
380 result->max = result->typ;
382 ret = ofnode_read_u32_array(node, name, &result->min, 3);
388 int ofnode_decode_display_timing(ofnode parent, int index,
389 struct display_timing *dt)
392 ofnode timings, node;
396 timings = ofnode_find_subnode(parent, "display-timings");
397 if (!ofnode_valid(timings))
401 ofnode_for_each_subnode(node, timings) {
406 if (!ofnode_valid(node))
409 memset(dt, 0, sizeof(*dt));
411 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
412 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
413 ret |= decode_timing_property(node, "hactive", &dt->hactive);
414 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
415 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
416 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
417 ret |= decode_timing_property(node, "vactive", &dt->vactive);
418 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
419 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
422 val = ofnode_read_u32_default(node, "vsync-active", -1);
424 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
425 DISPLAY_FLAGS_VSYNC_LOW;
427 val = ofnode_read_u32_default(node, "hsync-active", -1);
429 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
430 DISPLAY_FLAGS_HSYNC_LOW;
432 val = ofnode_read_u32_default(node, "de-active", -1);
434 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
435 DISPLAY_FLAGS_DE_LOW;
437 val = ofnode_read_u32_default(node, "pixelclk-active", -1);
439 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
440 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
443 if (ofnode_read_bool(node, "interlaced"))
444 dt->flags |= DISPLAY_FLAGS_INTERLACED;
445 if (ofnode_read_bool(node, "doublescan"))
446 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
447 if (ofnode_read_bool(node, "doubleclk"))
448 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
453 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
455 if (ofnode_is_np(node))
456 return of_get_property(ofnode_to_np(node), propname, lenp);
458 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
462 bool ofnode_is_available(ofnode node)
464 if (ofnode_is_np(node))
465 return of_device_is_available(ofnode_to_np(node));
467 return fdtdec_get_is_enabled(gd->fdt_blob,
468 ofnode_to_offset(node));
471 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
474 if (ofnode_is_np(node)) {
477 const struct device_node *np = ofnode_to_np(node);
478 const __be32 *prop = of_get_property(np, property, &psize);
481 return FDT_ADDR_T_NONE;
482 na = of_n_addr_cells(np);
483 ns = of_n_addr_cells(np);
484 *sizep = of_read_number(prop + na, ns);
485 return of_read_number(prop, na);
487 return fdtdec_get_addr_size(gd->fdt_blob,
488 ofnode_to_offset(node), property,
493 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
496 if (ofnode_is_np(node)) {
497 const struct device_node *np = ofnode_to_np(node);
499 const __be32 *prop = of_get_property(np, propname, &psize);
501 if (!prop || sz != psize)
503 return (uint8_t *)prop;
506 return fdtdec_locate_byte_array(gd->fdt_blob,
507 ofnode_to_offset(node), propname, sz);
511 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
512 const char *propname, struct fdt_pci_addr *addr)
518 debug("%s: %s: ", __func__, propname);
521 * If we follow the pci bus bindings strictly, we should check
522 * the value of the node's parent node's #address-cells and
523 * #size-cells. They need to be 3 and 2 accordingly. However,
524 * for simplicity we skip the check here.
526 cell = ofnode_get_property(node, propname, &len);
530 if ((len % FDT_PCI_REG_SIZE) == 0) {
531 int num = len / FDT_PCI_REG_SIZE;
534 for (i = 0; i < num; i++) {
535 debug("pci address #%d: %08lx %08lx %08lx\n", i,
536 (ulong)fdt32_to_cpu(cell[0]),
537 (ulong)fdt32_to_cpu(cell[1]),
538 (ulong)fdt32_to_cpu(cell[2]));
539 if ((fdt32_to_cpu(*cell) & type) == type) {
540 addr->phys_hi = fdt32_to_cpu(cell[0]);
541 addr->phys_mid = fdt32_to_cpu(cell[1]);
542 addr->phys_lo = fdt32_to_cpu(cell[1]);
546 cell += (FDT_PCI_ADDR_CELLS +
561 debug("(not found)\n");
565 int ofnode_read_addr_cells(ofnode node)
567 if (ofnode_is_np(node))
568 return of_n_addr_cells(ofnode_to_np(node));
569 else /* NOTE: this call should walk up the parent stack */
570 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
573 int ofnode_read_size_cells(ofnode node)
575 if (ofnode_is_np(node))
576 return of_n_size_cells(ofnode_to_np(node));
577 else /* NOTE: this call should walk up the parent stack */
578 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
581 int ofnode_read_simple_addr_cells(ofnode node)
583 if (ofnode_is_np(node))
584 return of_simple_addr_cells(ofnode_to_np(node));
586 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
589 int ofnode_read_simple_size_cells(ofnode node)
591 if (ofnode_is_np(node))
592 return of_simple_size_cells(ofnode_to_np(node));
594 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
597 bool ofnode_pre_reloc(ofnode node)
599 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
602 #ifdef CONFIG_TPL_BUILD
603 if (ofnode_read_bool(node, "u-boot,dm-tpl"))
605 #elif defined(CONFIG_SPL_BUILD)
606 if (ofnode_read_bool(node, "u-boot,dm-spl"))
610 * In regular builds individual spl and tpl handling both
611 * count as handled pre-relocation for later second init.
613 if (ofnode_read_bool(node, "u-boot,dm-spl") ||
614 ofnode_read_bool(node, "u-boot,dm-tpl"))
621 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
623 if (ofnode_is_np(node)) {
624 return of_address_to_resource(ofnode_to_np(node), index, res);
626 struct fdt_resource fres;
629 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
630 "reg", index, &fres);
633 memset(res, '\0', sizeof(*res));
634 res->start = fres.start;
641 int ofnode_read_resource_byname(ofnode node, const char *name,
642 struct resource *res)
646 index = ofnode_stringlist_search(node, "reg-names", name);
650 return ofnode_read_resource(node, index, res);
653 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
655 if (ofnode_is_np(node))
656 return of_translate_address(ofnode_to_np(node), in_addr);
658 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);