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9e512045 SG |
1 | /* |
2 | * Copyright (c) 2017 Google, Inc | |
3 | * Written by Simon Glass <sjg@chromium.org> | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #include <common.h> | |
9 | #include <dm.h> | |
10 | #include <fdtdec.h> | |
11 | #include <fdt_support.h> | |
12 | #include <libfdt.h> | |
13 | #include <dm/of_access.h> | |
bed77496 | 14 | #include <dm/of_addr.h> |
9e512045 SG |
15 | #include <dm/ofnode.h> |
16 | #include <linux/err.h> | |
17 | ||
18 | int ofnode_read_u32(ofnode node, const char *propname, u32 *outp) | |
19 | { | |
20 | assert(ofnode_valid(node)); | |
21 | debug("%s: %s: ", __func__, propname); | |
22 | ||
23 | if (ofnode_is_np(node)) { | |
24 | return of_read_u32(ofnode_to_np(node), propname, outp); | |
25 | } else { | |
26 | const int *cell; | |
27 | int len; | |
28 | ||
29 | cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), | |
30 | propname, &len); | |
31 | if (!cell || len < sizeof(int)) { | |
32 | debug("(not found)\n"); | |
33 | return -EINVAL; | |
34 | } | |
35 | *outp = fdt32_to_cpu(cell[0]); | |
36 | } | |
37 | debug("%#x (%d)\n", *outp, *outp); | |
38 | ||
39 | return 0; | |
40 | } | |
41 | ||
42 | int ofnode_read_u32_default(ofnode node, const char *propname, u32 def) | |
43 | { | |
44 | assert(ofnode_valid(node)); | |
45 | ofnode_read_u32(node, propname, &def); | |
46 | ||
47 | return def; | |
48 | } | |
49 | ||
50 | int ofnode_read_s32_default(ofnode node, const char *propname, s32 def) | |
51 | { | |
52 | assert(ofnode_valid(node)); | |
53 | ofnode_read_u32(node, propname, (u32 *)&def); | |
54 | ||
55 | return def; | |
56 | } | |
57 | ||
58 | bool ofnode_read_bool(ofnode node, const char *propname) | |
59 | { | |
60 | bool val; | |
61 | ||
62 | assert(ofnode_valid(node)); | |
63 | debug("%s: %s: ", __func__, propname); | |
64 | ||
65 | if (ofnode_is_np(node)) { | |
66 | val = !!of_find_property(ofnode_to_np(node), propname, NULL); | |
67 | } else { | |
68 | val = !!fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), | |
69 | propname, NULL); | |
70 | } | |
71 | debug("%s\n", val ? "true" : "false"); | |
72 | ||
73 | return val; | |
74 | } | |
75 | ||
76 | const char *ofnode_read_string(ofnode node, const char *propname) | |
77 | { | |
78 | const char *str = NULL; | |
79 | int len = -1; | |
80 | ||
81 | assert(ofnode_valid(node)); | |
82 | debug("%s: %s: ", __func__, propname); | |
83 | ||
84 | if (ofnode_is_np(node)) { | |
85 | struct property *prop = of_find_property( | |
86 | ofnode_to_np(node), propname, NULL); | |
87 | ||
88 | if (prop) { | |
89 | str = prop->value; | |
90 | len = prop->length; | |
91 | } | |
92 | } else { | |
93 | str = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), | |
94 | propname, &len); | |
95 | } | |
96 | if (!str) { | |
97 | debug("<not found>\n"); | |
98 | return NULL; | |
99 | } | |
100 | if (strnlen(str, len) >= len) { | |
101 | debug("<invalid>\n"); | |
102 | return NULL; | |
103 | } | |
104 | debug("%s\n", str); | |
105 | ||
106 | return str; | |
107 | } | |
108 | ||
109 | ofnode ofnode_find_subnode(ofnode node, const char *subnode_name) | |
110 | { | |
111 | ofnode subnode; | |
112 | ||
113 | assert(ofnode_valid(node)); | |
114 | debug("%s: %s: ", __func__, subnode_name); | |
115 | ||
116 | if (ofnode_is_np(node)) { | |
117 | const struct device_node *np = ofnode_to_np(node); | |
118 | ||
119 | for (np = np->child; np; np = np->sibling) { | |
120 | if (!strcmp(subnode_name, np->name)) | |
121 | break; | |
122 | } | |
123 | subnode = np_to_ofnode(np); | |
124 | } else { | |
125 | int ooffset = fdt_subnode_offset(gd->fdt_blob, | |
126 | ofnode_to_offset(node), subnode_name); | |
127 | subnode = offset_to_ofnode(ooffset); | |
128 | } | |
129 | debug("%s\n", ofnode_valid(subnode) ? | |
130 | ofnode_get_name(subnode) : "<none>"); | |
131 | ||
132 | return subnode; | |
133 | } | |
134 | ||
135 | int ofnode_read_u32_array(ofnode node, const char *propname, | |
136 | u32 *out_values, size_t sz) | |
137 | { | |
138 | assert(ofnode_valid(node)); | |
139 | debug("%s: %s: ", __func__, propname); | |
140 | ||
141 | if (ofnode_is_np(node)) { | |
142 | return of_read_u32_array(ofnode_to_np(node), propname, | |
143 | out_values, sz); | |
144 | } else { | |
145 | return fdtdec_get_int_array(gd->fdt_blob, | |
146 | ofnode_to_offset(node), propname, | |
147 | out_values, sz); | |
148 | } | |
149 | } | |
150 | ||
151 | ofnode ofnode_first_subnode(ofnode node) | |
152 | { | |
153 | assert(ofnode_valid(node)); | |
154 | if (ofnode_is_np(node)) | |
155 | return np_to_ofnode(node.np->child); | |
156 | ||
157 | return offset_to_ofnode( | |
158 | fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node))); | |
159 | } | |
160 | ||
161 | ofnode ofnode_next_subnode(ofnode node) | |
162 | { | |
163 | assert(ofnode_valid(node)); | |
164 | if (ofnode_is_np(node)) | |
165 | return np_to_ofnode(node.np->sibling); | |
166 | ||
167 | return offset_to_ofnode( | |
168 | fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node))); | |
169 | } | |
170 | ||
171 | const char *ofnode_get_name(ofnode node) | |
172 | { | |
173 | assert(ofnode_valid(node)); | |
174 | if (ofnode_is_np(node)) | |
175 | return strrchr(node.np->full_name, '/') + 1; | |
176 | ||
177 | return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL); | |
178 | } | |
179 | ||
180 | int ofnode_read_size(ofnode node, const char *propname) | |
181 | { | |
182 | int len; | |
183 | ||
184 | if (ofnode_is_np(node)) { | |
185 | struct property *prop = of_find_property( | |
186 | ofnode_to_np(node), propname, NULL); | |
187 | ||
188 | if (prop) | |
189 | return prop->length; | |
190 | } else { | |
191 | if (fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname, | |
192 | &len)) | |
193 | return len; | |
194 | } | |
195 | ||
196 | return -EINVAL; | |
197 | } | |
198 | ||
bed77496 SG |
199 | fdt_addr_t ofnode_get_addr_index(ofnode node, int index) |
200 | { | |
201 | if (ofnode_is_np(node)) { | |
202 | const __be32 *prop_val; | |
203 | uint flags; | |
204 | u64 size; | |
205 | ||
206 | prop_val = of_get_address( | |
207 | (struct device_node *)ofnode_to_np(node), index, | |
208 | &size, &flags); | |
209 | if (!prop_val) | |
210 | return FDT_ADDR_T_NONE; | |
211 | return be32_to_cpup(prop_val); | |
212 | } else { | |
213 | return fdt_get_base_address(gd->fdt_blob, | |
214 | ofnode_to_offset(node)); | |
215 | } | |
216 | ||
217 | return FDT_ADDR_T_NONE; | |
218 | } | |
219 | ||
220 | fdt_addr_t ofnode_get_addr(ofnode node) | |
221 | { | |
222 | return ofnode_get_addr_index(node, 0); | |
223 | } | |
224 | ||
9e512045 SG |
225 | int ofnode_stringlist_search(ofnode node, const char *property, |
226 | const char *string) | |
227 | { | |
228 | if (ofnode_is_np(node)) { | |
229 | return of_property_match_string(ofnode_to_np(node), | |
230 | property, string); | |
231 | } else { | |
232 | int ret; | |
233 | ||
234 | ret = fdt_stringlist_search(gd->fdt_blob, | |
235 | ofnode_to_offset(node), property, | |
236 | string); | |
237 | if (ret == -FDT_ERR_NOTFOUND) | |
238 | return -ENODATA; | |
239 | else if (ret < 0) | |
240 | return -EINVAL; | |
241 | ||
242 | return ret; | |
243 | } | |
244 | } | |
245 | ||
246 | int ofnode_read_string_index(ofnode node, const char *property, int index, | |
247 | const char **outp) | |
248 | { | |
249 | if (ofnode_is_np(node)) { | |
250 | return of_property_read_string_index(ofnode_to_np(node), | |
251 | property, index, outp); | |
252 | } else { | |
253 | int len; | |
254 | ||
255 | *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node), | |
256 | property, index, &len); | |
257 | if (len < 0) | |
258 | return -EINVAL; | |
259 | return 0; | |
260 | } | |
261 | } | |
262 | ||
8c293d6a SG |
263 | int ofnode_read_string_count(ofnode node, const char *property) |
264 | { | |
265 | if (ofnode_is_np(node)) { | |
266 | return of_property_count_strings(ofnode_to_np(node), property); | |
267 | } else { | |
268 | return fdt_stringlist_count(gd->fdt_blob, | |
269 | ofnode_to_offset(node), property); | |
270 | } | |
271 | } | |
272 | ||
9e512045 SG |
273 | static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in, |
274 | struct ofnode_phandle_args *out) | |
275 | { | |
276 | assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); | |
277 | out->node = offset_to_ofnode(in->node); | |
278 | out->args_count = in->args_count; | |
279 | memcpy(out->args, in->args, sizeof(out->args)); | |
280 | } | |
281 | ||
282 | static void ofnode_from_of_phandle_args(struct of_phandle_args *in, | |
283 | struct ofnode_phandle_args *out) | |
284 | { | |
285 | assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); | |
286 | out->node = np_to_ofnode(in->np); | |
287 | out->args_count = in->args_count; | |
288 | memcpy(out->args, in->args, sizeof(out->args)); | |
289 | } | |
290 | ||
291 | int ofnode_parse_phandle_with_args(ofnode node, const char *list_name, | |
292 | const char *cells_name, int cell_count, | |
293 | int index, | |
294 | struct ofnode_phandle_args *out_args) | |
295 | { | |
296 | if (ofnode_is_np(node)) { | |
297 | struct of_phandle_args args; | |
298 | int ret; | |
299 | ||
300 | ret = of_parse_phandle_with_args(ofnode_to_np(node), | |
301 | list_name, cells_name, index, &args); | |
302 | if (ret) | |
303 | return ret; | |
304 | ofnode_from_of_phandle_args(&args, out_args); | |
305 | } else { | |
306 | struct fdtdec_phandle_args args; | |
307 | int ret; | |
308 | ||
309 | ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, | |
310 | ofnode_to_offset(node), list_name, cells_name, | |
311 | cell_count, index, &args); | |
312 | if (ret) | |
313 | return ret; | |
314 | ofnode_from_fdtdec_phandle_args(&args, out_args); | |
315 | } | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
320 | ofnode ofnode_path(const char *path) | |
321 | { | |
322 | if (of_live_active()) | |
323 | return np_to_ofnode(of_find_node_by_path(path)); | |
324 | else | |
325 | return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path)); | |
326 | } | |
327 | ||
328 | const char *ofnode_get_chosen_prop(const char *name) | |
329 | { | |
330 | ofnode chosen_node; | |
331 | ||
332 | chosen_node = ofnode_path("/chosen"); | |
333 | ||
334 | return ofnode_read_string(chosen_node, name); | |
335 | } | |
336 | ||
337 | ofnode ofnode_get_chosen_node(const char *name) | |
338 | { | |
339 | const char *prop; | |
340 | ||
341 | prop = ofnode_get_chosen_prop(name); | |
342 | if (!prop) | |
343 | return ofnode_null(); | |
344 | ||
345 | return ofnode_path(prop); | |
346 | } | |
347 | ||
348 | static int decode_timing_property(ofnode node, const char *name, | |
349 | struct timing_entry *result) | |
350 | { | |
351 | int length, ret = 0; | |
352 | ||
353 | length = ofnode_read_size(node, name); | |
354 | if (length < 0) { | |
355 | debug("%s: could not find property %s\n", | |
356 | ofnode_get_name(node), name); | |
357 | return length; | |
358 | } | |
359 | ||
360 | if (length == sizeof(u32)) { | |
361 | result->typ = ofnode_read_u32_default(node, name, 0); | |
362 | result->min = result->typ; | |
363 | result->max = result->typ; | |
364 | } else { | |
365 | ret = ofnode_read_u32_array(node, name, &result->min, 3); | |
366 | } | |
367 | ||
368 | return ret; | |
369 | } | |
370 | ||
371 | int ofnode_decode_display_timing(ofnode parent, int index, | |
372 | struct display_timing *dt) | |
373 | { | |
374 | int i; | |
375 | ofnode timings, node; | |
376 | u32 val = 0; | |
377 | int ret = 0; | |
378 | ||
379 | timings = ofnode_find_subnode(parent, "display-timings"); | |
380 | if (!ofnode_valid(timings)) | |
381 | return -EINVAL; | |
382 | ||
383 | for (i = 0, node = ofnode_first_subnode(timings); | |
384 | ofnode_valid(node) && i != index; | |
385 | node = ofnode_first_subnode(node)) | |
386 | i++; | |
387 | ||
388 | if (!ofnode_valid(node)) | |
389 | return -EINVAL; | |
390 | ||
391 | memset(dt, 0, sizeof(*dt)); | |
392 | ||
393 | ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch); | |
394 | ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch); | |
395 | ret |= decode_timing_property(node, "hactive", &dt->hactive); | |
396 | ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len); | |
397 | ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch); | |
398 | ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch); | |
399 | ret |= decode_timing_property(node, "vactive", &dt->vactive); | |
400 | ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len); | |
401 | ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock); | |
402 | ||
403 | dt->flags = 0; | |
404 | val = ofnode_read_u32_default(node, "vsync-active", -1); | |
405 | if (val != -1) { | |
406 | dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : | |
407 | DISPLAY_FLAGS_VSYNC_LOW; | |
408 | } | |
409 | val = ofnode_read_u32_default(node, "hsync-active", -1); | |
410 | if (val != -1) { | |
411 | dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : | |
412 | DISPLAY_FLAGS_HSYNC_LOW; | |
413 | } | |
414 | val = ofnode_read_u32_default(node, "de-active", -1); | |
415 | if (val != -1) { | |
416 | dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : | |
417 | DISPLAY_FLAGS_DE_LOW; | |
418 | } | |
419 | val = ofnode_read_u32_default(node, "pixelclk-active", -1); | |
420 | if (val != -1) { | |
421 | dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : | |
422 | DISPLAY_FLAGS_PIXDATA_NEGEDGE; | |
423 | } | |
424 | ||
425 | if (ofnode_read_bool(node, "interlaced")) | |
426 | dt->flags |= DISPLAY_FLAGS_INTERLACED; | |
427 | if (ofnode_read_bool(node, "doublescan")) | |
428 | dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; | |
429 | if (ofnode_read_bool(node, "doubleclk")) | |
430 | dt->flags |= DISPLAY_FLAGS_DOUBLECLK; | |
431 | ||
432 | return ret; | |
433 | } | |
434 | ||
435 | const u32 *ofnode_read_prop(ofnode node, const char *propname, int *lenp) | |
436 | { | |
437 | if (ofnode_is_np(node)) { | |
438 | struct property *prop; | |
439 | ||
440 | prop = of_find_property(ofnode_to_np(node), propname, lenp); | |
441 | if (!prop) | |
442 | return NULL; | |
443 | return prop->value; | |
444 | } else { | |
445 | return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), | |
446 | propname, lenp); | |
447 | } | |
448 | } | |
449 | ||
450 | bool ofnode_is_available(ofnode node) | |
451 | { | |
452 | if (ofnode_is_np(node)) | |
453 | return of_device_is_available(ofnode_to_np(node)); | |
454 | else | |
455 | return fdtdec_get_is_enabled(gd->fdt_blob, | |
456 | ofnode_to_offset(node)); | |
457 | } | |
458 | ||
459 | fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property, | |
460 | fdt_size_t *sizep) | |
461 | { | |
462 | if (ofnode_is_np(node)) { | |
463 | int na, ns; | |
464 | int psize; | |
465 | const struct device_node *np = ofnode_to_np(node); | |
466 | const __be32 *prop = of_get_property(np, "reg", &psize); | |
467 | ||
468 | na = of_n_addr_cells(np); | |
469 | ns = of_n_addr_cells(np); | |
a4b8e372 SG |
470 | *sizep = of_read_number(prop + na, ns); |
471 | return of_read_number(prop, na); | |
9e512045 SG |
472 | } else { |
473 | return fdtdec_get_addr_size(gd->fdt_blob, | |
474 | ofnode_to_offset(node), property, | |
475 | sizep); | |
476 | } | |
477 | } | |
478 | ||
479 | const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname, | |
480 | size_t sz) | |
481 | { | |
482 | if (ofnode_is_np(node)) { | |
483 | const struct device_node *np = ofnode_to_np(node); | |
484 | int psize; | |
485 | const __be32 *prop = of_get_property(np, propname, &psize); | |
486 | ||
487 | if (!prop || sz != psize) | |
488 | return NULL; | |
489 | return (uint8_t *)prop; | |
490 | ||
491 | } else { | |
492 | return fdtdec_locate_byte_array(gd->fdt_blob, | |
493 | ofnode_to_offset(node), propname, sz); | |
494 | } | |
495 | } | |
496 | ||
497 | int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type, | |
498 | const char *propname, struct fdt_pci_addr *addr) | |
499 | { | |
500 | const u32 *cell; | |
501 | int len; | |
502 | int ret = -ENOENT; | |
503 | ||
504 | debug("%s: %s: ", __func__, propname); | |
505 | ||
506 | /* | |
507 | * If we follow the pci bus bindings strictly, we should check | |
508 | * the value of the node's parent node's #address-cells and | |
509 | * #size-cells. They need to be 3 and 2 accordingly. However, | |
510 | * for simplicity we skip the check here. | |
511 | */ | |
512 | cell = ofnode_read_prop(node, propname, &len); | |
513 | if (!cell) | |
514 | goto fail; | |
515 | ||
516 | if ((len % FDT_PCI_REG_SIZE) == 0) { | |
517 | int num = len / FDT_PCI_REG_SIZE; | |
518 | int i; | |
519 | ||
520 | for (i = 0; i < num; i++) { | |
521 | debug("pci address #%d: %08lx %08lx %08lx\n", i, | |
522 | (ulong)fdt32_to_cpu(cell[0]), | |
523 | (ulong)fdt32_to_cpu(cell[1]), | |
524 | (ulong)fdt32_to_cpu(cell[2])); | |
525 | if ((fdt32_to_cpu(*cell) & type) == type) { | |
526 | addr->phys_hi = fdt32_to_cpu(cell[0]); | |
527 | addr->phys_mid = fdt32_to_cpu(cell[1]); | |
528 | addr->phys_lo = fdt32_to_cpu(cell[1]); | |
529 | break; | |
530 | } else { | |
531 | cell += (FDT_PCI_ADDR_CELLS + | |
532 | FDT_PCI_SIZE_CELLS); | |
533 | } | |
534 | } | |
535 | ||
536 | if (i == num) { | |
537 | ret = -ENXIO; | |
538 | goto fail; | |
539 | } | |
540 | ||
541 | return 0; | |
542 | } else { | |
543 | ret = -EINVAL; | |
544 | } | |
545 | ||
546 | fail: | |
547 | debug("(not found)\n"); | |
548 | return ret; | |
549 | } | |
550 | ||
551 | int ofnode_read_addr_cells(ofnode node) | |
552 | { | |
553 | if (ofnode_is_np(node)) | |
554 | return of_n_addr_cells(ofnode_to_np(node)); | |
555 | else | |
556 | return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); | |
557 | } | |
558 | ||
559 | int ofnode_read_size_cells(ofnode node) | |
560 | { | |
561 | if (ofnode_is_np(node)) | |
562 | return of_n_size_cells(ofnode_to_np(node)); | |
563 | else | |
564 | return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); | |
565 | } | |
566 | ||
567 | bool ofnode_pre_reloc(ofnode node) | |
568 | { | |
569 | if (ofnode_read_prop(node, "u-boot,dm-pre-reloc", NULL)) | |
570 | return true; | |
571 | ||
572 | #ifdef CONFIG_TPL_BUILD | |
573 | if (ofnode_read_prop(node, "u-boot,dm-tpl", NULL)) | |
574 | return true; | |
575 | #elif defined(CONFIG_SPL_BUILD) | |
576 | if (ofnode_read_prop(node, "u-boot,dm-spl", NULL)) | |
577 | return true; | |
578 | #else | |
579 | /* | |
580 | * In regular builds individual spl and tpl handling both | |
581 | * count as handled pre-relocation for later second init. | |
582 | */ | |
583 | if (ofnode_read_prop(node, "u-boot,dm-spl", NULL) || | |
584 | ofnode_read_prop(node, "u-boot,dm-tpl", NULL)) | |
585 | return true; | |
586 | #endif | |
587 | ||
588 | return false; | |
589 | } |