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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 | ||
263 | static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in, | |
264 | struct ofnode_phandle_args *out) | |
265 | { | |
266 | assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); | |
267 | out->node = offset_to_ofnode(in->node); | |
268 | out->args_count = in->args_count; | |
269 | memcpy(out->args, in->args, sizeof(out->args)); | |
270 | } | |
271 | ||
272 | static void ofnode_from_of_phandle_args(struct of_phandle_args *in, | |
273 | struct ofnode_phandle_args *out) | |
274 | { | |
275 | assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); | |
276 | out->node = np_to_ofnode(in->np); | |
277 | out->args_count = in->args_count; | |
278 | memcpy(out->args, in->args, sizeof(out->args)); | |
279 | } | |
280 | ||
281 | int ofnode_parse_phandle_with_args(ofnode node, const char *list_name, | |
282 | const char *cells_name, int cell_count, | |
283 | int index, | |
284 | struct ofnode_phandle_args *out_args) | |
285 | { | |
286 | if (ofnode_is_np(node)) { | |
287 | struct of_phandle_args args; | |
288 | int ret; | |
289 | ||
290 | ret = of_parse_phandle_with_args(ofnode_to_np(node), | |
291 | list_name, cells_name, index, &args); | |
292 | if (ret) | |
293 | return ret; | |
294 | ofnode_from_of_phandle_args(&args, out_args); | |
295 | } else { | |
296 | struct fdtdec_phandle_args args; | |
297 | int ret; | |
298 | ||
299 | ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, | |
300 | ofnode_to_offset(node), list_name, cells_name, | |
301 | cell_count, index, &args); | |
302 | if (ret) | |
303 | return ret; | |
304 | ofnode_from_fdtdec_phandle_args(&args, out_args); | |
305 | } | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
310 | ofnode ofnode_path(const char *path) | |
311 | { | |
312 | if (of_live_active()) | |
313 | return np_to_ofnode(of_find_node_by_path(path)); | |
314 | else | |
315 | return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path)); | |
316 | } | |
317 | ||
318 | const char *ofnode_get_chosen_prop(const char *name) | |
319 | { | |
320 | ofnode chosen_node; | |
321 | ||
322 | chosen_node = ofnode_path("/chosen"); | |
323 | ||
324 | return ofnode_read_string(chosen_node, name); | |
325 | } | |
326 | ||
327 | ofnode ofnode_get_chosen_node(const char *name) | |
328 | { | |
329 | const char *prop; | |
330 | ||
331 | prop = ofnode_get_chosen_prop(name); | |
332 | if (!prop) | |
333 | return ofnode_null(); | |
334 | ||
335 | return ofnode_path(prop); | |
336 | } | |
337 | ||
338 | static int decode_timing_property(ofnode node, const char *name, | |
339 | struct timing_entry *result) | |
340 | { | |
341 | int length, ret = 0; | |
342 | ||
343 | length = ofnode_read_size(node, name); | |
344 | if (length < 0) { | |
345 | debug("%s: could not find property %s\n", | |
346 | ofnode_get_name(node), name); | |
347 | return length; | |
348 | } | |
349 | ||
350 | if (length == sizeof(u32)) { | |
351 | result->typ = ofnode_read_u32_default(node, name, 0); | |
352 | result->min = result->typ; | |
353 | result->max = result->typ; | |
354 | } else { | |
355 | ret = ofnode_read_u32_array(node, name, &result->min, 3); | |
356 | } | |
357 | ||
358 | return ret; | |
359 | } | |
360 | ||
361 | int ofnode_decode_display_timing(ofnode parent, int index, | |
362 | struct display_timing *dt) | |
363 | { | |
364 | int i; | |
365 | ofnode timings, node; | |
366 | u32 val = 0; | |
367 | int ret = 0; | |
368 | ||
369 | timings = ofnode_find_subnode(parent, "display-timings"); | |
370 | if (!ofnode_valid(timings)) | |
371 | return -EINVAL; | |
372 | ||
373 | for (i = 0, node = ofnode_first_subnode(timings); | |
374 | ofnode_valid(node) && i != index; | |
375 | node = ofnode_first_subnode(node)) | |
376 | i++; | |
377 | ||
378 | if (!ofnode_valid(node)) | |
379 | return -EINVAL; | |
380 | ||
381 | memset(dt, 0, sizeof(*dt)); | |
382 | ||
383 | ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch); | |
384 | ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch); | |
385 | ret |= decode_timing_property(node, "hactive", &dt->hactive); | |
386 | ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len); | |
387 | ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch); | |
388 | ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch); | |
389 | ret |= decode_timing_property(node, "vactive", &dt->vactive); | |
390 | ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len); | |
391 | ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock); | |
392 | ||
393 | dt->flags = 0; | |
394 | val = ofnode_read_u32_default(node, "vsync-active", -1); | |
395 | if (val != -1) { | |
396 | dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : | |
397 | DISPLAY_FLAGS_VSYNC_LOW; | |
398 | } | |
399 | val = ofnode_read_u32_default(node, "hsync-active", -1); | |
400 | if (val != -1) { | |
401 | dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : | |
402 | DISPLAY_FLAGS_HSYNC_LOW; | |
403 | } | |
404 | val = ofnode_read_u32_default(node, "de-active", -1); | |
405 | if (val != -1) { | |
406 | dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : | |
407 | DISPLAY_FLAGS_DE_LOW; | |
408 | } | |
409 | val = ofnode_read_u32_default(node, "pixelclk-active", -1); | |
410 | if (val != -1) { | |
411 | dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : | |
412 | DISPLAY_FLAGS_PIXDATA_NEGEDGE; | |
413 | } | |
414 | ||
415 | if (ofnode_read_bool(node, "interlaced")) | |
416 | dt->flags |= DISPLAY_FLAGS_INTERLACED; | |
417 | if (ofnode_read_bool(node, "doublescan")) | |
418 | dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; | |
419 | if (ofnode_read_bool(node, "doubleclk")) | |
420 | dt->flags |= DISPLAY_FLAGS_DOUBLECLK; | |
421 | ||
422 | return ret; | |
423 | } | |
424 | ||
425 | const u32 *ofnode_read_prop(ofnode node, const char *propname, int *lenp) | |
426 | { | |
427 | if (ofnode_is_np(node)) { | |
428 | struct property *prop; | |
429 | ||
430 | prop = of_find_property(ofnode_to_np(node), propname, lenp); | |
431 | if (!prop) | |
432 | return NULL; | |
433 | return prop->value; | |
434 | } else { | |
435 | return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), | |
436 | propname, lenp); | |
437 | } | |
438 | } | |
439 | ||
440 | bool ofnode_is_available(ofnode node) | |
441 | { | |
442 | if (ofnode_is_np(node)) | |
443 | return of_device_is_available(ofnode_to_np(node)); | |
444 | else | |
445 | return fdtdec_get_is_enabled(gd->fdt_blob, | |
446 | ofnode_to_offset(node)); | |
447 | } | |
448 | ||
449 | fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property, | |
450 | fdt_size_t *sizep) | |
451 | { | |
452 | if (ofnode_is_np(node)) { | |
453 | int na, ns; | |
454 | int psize; | |
455 | const struct device_node *np = ofnode_to_np(node); | |
456 | const __be32 *prop = of_get_property(np, "reg", &psize); | |
457 | ||
458 | na = of_n_addr_cells(np); | |
459 | ns = of_n_addr_cells(np); | |
460 | *sizep = of_read_number(prop + na, ns); | |
461 | return of_read_number(prop, na); | |
462 | } else { | |
463 | return fdtdec_get_addr_size(gd->fdt_blob, | |
464 | ofnode_to_offset(node), property, | |
465 | sizep); | |
466 | } | |
467 | } | |
468 | ||
469 | const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname, | |
470 | size_t sz) | |
471 | { | |
472 | if (ofnode_is_np(node)) { | |
473 | const struct device_node *np = ofnode_to_np(node); | |
474 | int psize; | |
475 | const __be32 *prop = of_get_property(np, propname, &psize); | |
476 | ||
477 | if (!prop || sz != psize) | |
478 | return NULL; | |
479 | return (uint8_t *)prop; | |
480 | ||
481 | } else { | |
482 | return fdtdec_locate_byte_array(gd->fdt_blob, | |
483 | ofnode_to_offset(node), propname, sz); | |
484 | } | |
485 | } | |
486 | ||
487 | int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type, | |
488 | const char *propname, struct fdt_pci_addr *addr) | |
489 | { | |
490 | const u32 *cell; | |
491 | int len; | |
492 | int ret = -ENOENT; | |
493 | ||
494 | debug("%s: %s: ", __func__, propname); | |
495 | ||
496 | /* | |
497 | * If we follow the pci bus bindings strictly, we should check | |
498 | * the value of the node's parent node's #address-cells and | |
499 | * #size-cells. They need to be 3 and 2 accordingly. However, | |
500 | * for simplicity we skip the check here. | |
501 | */ | |
502 | cell = ofnode_read_prop(node, propname, &len); | |
503 | if (!cell) | |
504 | goto fail; | |
505 | ||
506 | if ((len % FDT_PCI_REG_SIZE) == 0) { | |
507 | int num = len / FDT_PCI_REG_SIZE; | |
508 | int i; | |
509 | ||
510 | for (i = 0; i < num; i++) { | |
511 | debug("pci address #%d: %08lx %08lx %08lx\n", i, | |
512 | (ulong)fdt32_to_cpu(cell[0]), | |
513 | (ulong)fdt32_to_cpu(cell[1]), | |
514 | (ulong)fdt32_to_cpu(cell[2])); | |
515 | if ((fdt32_to_cpu(*cell) & type) == type) { | |
516 | addr->phys_hi = fdt32_to_cpu(cell[0]); | |
517 | addr->phys_mid = fdt32_to_cpu(cell[1]); | |
518 | addr->phys_lo = fdt32_to_cpu(cell[1]); | |
519 | break; | |
520 | } else { | |
521 | cell += (FDT_PCI_ADDR_CELLS + | |
522 | FDT_PCI_SIZE_CELLS); | |
523 | } | |
524 | } | |
525 | ||
526 | if (i == num) { | |
527 | ret = -ENXIO; | |
528 | goto fail; | |
529 | } | |
530 | ||
531 | return 0; | |
532 | } else { | |
533 | ret = -EINVAL; | |
534 | } | |
535 | ||
536 | fail: | |
537 | debug("(not found)\n"); | |
538 | return ret; | |
539 | } | |
540 | ||
541 | int ofnode_read_addr_cells(ofnode node) | |
542 | { | |
543 | if (ofnode_is_np(node)) | |
544 | return of_n_addr_cells(ofnode_to_np(node)); | |
545 | else | |
546 | return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); | |
547 | } | |
548 | ||
549 | int ofnode_read_size_cells(ofnode node) | |
550 | { | |
551 | if (ofnode_is_np(node)) | |
552 | return of_n_size_cells(ofnode_to_np(node)); | |
553 | else | |
554 | return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); | |
555 | } | |
556 | ||
557 | bool ofnode_pre_reloc(ofnode node) | |
558 | { | |
559 | if (ofnode_read_prop(node, "u-boot,dm-pre-reloc", NULL)) | |
560 | return true; | |
561 | ||
562 | #ifdef CONFIG_TPL_BUILD | |
563 | if (ofnode_read_prop(node, "u-boot,dm-tpl", NULL)) | |
564 | return true; | |
565 | #elif defined(CONFIG_SPL_BUILD) | |
566 | if (ofnode_read_prop(node, "u-boot,dm-spl", NULL)) | |
567 | return true; | |
568 | #else | |
569 | /* | |
570 | * In regular builds individual spl and tpl handling both | |
571 | * count as handled pre-relocation for later second init. | |
572 | */ | |
573 | if (ofnode_read_prop(node, "u-boot,dm-spl", NULL) || | |
574 | ofnode_read_prop(node, "u-boot,dm-tpl", NULL)) | |
575 | return true; | |
576 | #endif | |
577 | ||
578 | return false; | |
579 | } |