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;
231 prop_val = of_get_address(ofnode_to_np(node), index, &size,
234 return FDT_ADDR_T_NONE;
236 if (IS_ENABLED(CONFIG_OF_TRANSLATE)) {
237 return of_translate_address(ofnode_to_np(node), prop_val);
239 na = of_n_addr_cells(ofnode_to_np(node));
240 return of_read_number(prop_val, na);
243 return fdt_get_base_address(gd->fdt_blob,
244 ofnode_to_offset(node));
247 return FDT_ADDR_T_NONE;
250 fdt_addr_t ofnode_get_addr(ofnode node)
252 return ofnode_get_addr_index(node, 0);
255 int ofnode_stringlist_search(ofnode node, const char *property,
258 if (ofnode_is_np(node)) {
259 return of_property_match_string(ofnode_to_np(node),
264 ret = fdt_stringlist_search(gd->fdt_blob,
265 ofnode_to_offset(node), property,
267 if (ret == -FDT_ERR_NOTFOUND)
276 int ofnode_read_string_index(ofnode node, const char *property, int index,
279 if (ofnode_is_np(node)) {
280 return of_property_read_string_index(ofnode_to_np(node),
281 property, index, outp);
285 *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
286 property, index, &len);
293 int ofnode_read_string_count(ofnode node, const char *property)
295 if (ofnode_is_np(node)) {
296 return of_property_count_strings(ofnode_to_np(node), property);
298 return fdt_stringlist_count(gd->fdt_blob,
299 ofnode_to_offset(node), property);
303 static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
304 struct ofnode_phandle_args *out)
306 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
307 out->node = offset_to_ofnode(in->node);
308 out->args_count = in->args_count;
309 memcpy(out->args, in->args, sizeof(out->args));
312 static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
313 struct ofnode_phandle_args *out)
315 assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
316 out->node = np_to_ofnode(in->np);
317 out->args_count = in->args_count;
318 memcpy(out->args, in->args, sizeof(out->args));
321 int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
322 const char *cells_name, int cell_count,
324 struct ofnode_phandle_args *out_args)
326 if (ofnode_is_np(node)) {
327 struct of_phandle_args args;
330 ret = of_parse_phandle_with_args(ofnode_to_np(node),
331 list_name, cells_name, index,
335 ofnode_from_of_phandle_args(&args, out_args);
337 struct fdtdec_phandle_args args;
340 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
341 ofnode_to_offset(node),
342 list_name, cells_name,
343 cell_count, index, &args);
346 ofnode_from_fdtdec_phandle_args(&args, out_args);
352 int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
353 const char *cells_name)
355 if (ofnode_is_np(node))
356 return of_count_phandle_with_args(ofnode_to_np(node),
357 list_name, cells_name);
359 return fdtdec_parse_phandle_with_args(gd->fdt_blob,
360 ofnode_to_offset(node), list_name, cells_name,
364 ofnode ofnode_path(const char *path)
366 if (of_live_active())
367 return np_to_ofnode(of_find_node_by_path(path));
369 return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
372 const char *ofnode_get_chosen_prop(const char *name)
376 chosen_node = ofnode_path("/chosen");
378 return ofnode_read_string(chosen_node, name);
381 ofnode ofnode_get_chosen_node(const char *name)
385 prop = ofnode_get_chosen_prop(name);
387 return ofnode_null();
389 return ofnode_path(prop);
392 static int decode_timing_property(ofnode node, const char *name,
393 struct timing_entry *result)
397 length = ofnode_read_size(node, name);
399 debug("%s: could not find property %s\n",
400 ofnode_get_name(node), name);
404 if (length == sizeof(u32)) {
405 result->typ = ofnode_read_u32_default(node, name, 0);
406 result->min = result->typ;
407 result->max = result->typ;
409 ret = ofnode_read_u32_array(node, name, &result->min, 3);
415 int ofnode_decode_display_timing(ofnode parent, int index,
416 struct display_timing *dt)
419 ofnode timings, node;
423 timings = ofnode_find_subnode(parent, "display-timings");
424 if (!ofnode_valid(timings))
428 ofnode_for_each_subnode(node, timings) {
433 if (!ofnode_valid(node))
436 memset(dt, 0, sizeof(*dt));
438 ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
439 ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
440 ret |= decode_timing_property(node, "hactive", &dt->hactive);
441 ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
442 ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
443 ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
444 ret |= decode_timing_property(node, "vactive", &dt->vactive);
445 ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
446 ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
449 val = ofnode_read_u32_default(node, "vsync-active", -1);
451 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
452 DISPLAY_FLAGS_VSYNC_LOW;
454 val = ofnode_read_u32_default(node, "hsync-active", -1);
456 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
457 DISPLAY_FLAGS_HSYNC_LOW;
459 val = ofnode_read_u32_default(node, "de-active", -1);
461 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
462 DISPLAY_FLAGS_DE_LOW;
464 val = ofnode_read_u32_default(node, "pixelclk-active", -1);
466 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
467 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
470 if (ofnode_read_bool(node, "interlaced"))
471 dt->flags |= DISPLAY_FLAGS_INTERLACED;
472 if (ofnode_read_bool(node, "doublescan"))
473 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
474 if (ofnode_read_bool(node, "doubleclk"))
475 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
480 const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
482 if (ofnode_is_np(node))
483 return of_get_property(ofnode_to_np(node), propname, lenp);
485 return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
489 bool ofnode_is_available(ofnode node)
491 if (ofnode_is_np(node))
492 return of_device_is_available(ofnode_to_np(node));
494 return fdtdec_get_is_enabled(gd->fdt_blob,
495 ofnode_to_offset(node));
498 fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
501 if (ofnode_is_np(node)) {
504 const struct device_node *np = ofnode_to_np(node);
505 const __be32 *prop = of_get_property(np, property, &psize);
508 return FDT_ADDR_T_NONE;
509 na = of_n_addr_cells(np);
510 ns = of_n_addr_cells(np);
511 *sizep = of_read_number(prop + na, ns);
512 return of_read_number(prop, na);
514 return fdtdec_get_addr_size(gd->fdt_blob,
515 ofnode_to_offset(node), property,
520 const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
523 if (ofnode_is_np(node)) {
524 const struct device_node *np = ofnode_to_np(node);
526 const __be32 *prop = of_get_property(np, propname, &psize);
528 if (!prop || sz != psize)
530 return (uint8_t *)prop;
533 return fdtdec_locate_byte_array(gd->fdt_blob,
534 ofnode_to_offset(node), propname, sz);
538 int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
539 const char *propname, struct fdt_pci_addr *addr)
545 debug("%s: %s: ", __func__, propname);
548 * If we follow the pci bus bindings strictly, we should check
549 * the value of the node's parent node's #address-cells and
550 * #size-cells. They need to be 3 and 2 accordingly. However,
551 * for simplicity we skip the check here.
553 cell = ofnode_get_property(node, propname, &len);
557 if ((len % FDT_PCI_REG_SIZE) == 0) {
558 int num = len / FDT_PCI_REG_SIZE;
561 for (i = 0; i < num; i++) {
562 debug("pci address #%d: %08lx %08lx %08lx\n", i,
563 (ulong)fdt32_to_cpu(cell[0]),
564 (ulong)fdt32_to_cpu(cell[1]),
565 (ulong)fdt32_to_cpu(cell[2]));
566 if ((fdt32_to_cpu(*cell) & type) == type) {
567 addr->phys_hi = fdt32_to_cpu(cell[0]);
568 addr->phys_mid = fdt32_to_cpu(cell[1]);
569 addr->phys_lo = fdt32_to_cpu(cell[1]);
573 cell += (FDT_PCI_ADDR_CELLS +
588 debug("(not found)\n");
592 int ofnode_read_addr_cells(ofnode node)
594 if (ofnode_is_np(node))
595 return of_n_addr_cells(ofnode_to_np(node));
596 else /* NOTE: this call should walk up the parent stack */
597 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
600 int ofnode_read_size_cells(ofnode node)
602 if (ofnode_is_np(node))
603 return of_n_size_cells(ofnode_to_np(node));
604 else /* NOTE: this call should walk up the parent stack */
605 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
608 int ofnode_read_simple_addr_cells(ofnode node)
610 if (ofnode_is_np(node))
611 return of_simple_addr_cells(ofnode_to_np(node));
613 return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
616 int ofnode_read_simple_size_cells(ofnode node)
618 if (ofnode_is_np(node))
619 return of_simple_size_cells(ofnode_to_np(node));
621 return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
624 bool ofnode_pre_reloc(ofnode node)
626 if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
629 #ifdef CONFIG_TPL_BUILD
630 if (ofnode_read_bool(node, "u-boot,dm-tpl"))
632 #elif defined(CONFIG_SPL_BUILD)
633 if (ofnode_read_bool(node, "u-boot,dm-spl"))
637 * In regular builds individual spl and tpl handling both
638 * count as handled pre-relocation for later second init.
640 if (ofnode_read_bool(node, "u-boot,dm-spl") ||
641 ofnode_read_bool(node, "u-boot,dm-tpl"))
648 int ofnode_read_resource(ofnode node, uint index, struct resource *res)
650 if (ofnode_is_np(node)) {
651 return of_address_to_resource(ofnode_to_np(node), index, res);
653 struct fdt_resource fres;
656 ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
657 "reg", index, &fres);
660 memset(res, '\0', sizeof(*res));
661 res->start = fres.start;
668 int ofnode_read_resource_byname(ofnode node, const char *name,
669 struct resource *res)
673 index = ofnode_stringlist_search(node, "reg-names", name);
677 return ofnode_read_resource(node, index, res);
680 u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
682 if (ofnode_is_np(node))
683 return of_translate_address(ofnode_to_np(node), in_addr);
685 return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);