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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 | { | |
b2ec7ea7 | 60 | const void *prop; |
9e512045 SG |
61 | |
62 | assert(ofnode_valid(node)); | |
63 | debug("%s: %s: ", __func__, propname); | |
64 | ||
b2ec7ea7 MY |
65 | prop = ofnode_get_property(node, propname, NULL); |
66 | ||
67 | debug("%s\n", prop ? "true" : "false"); | |
9e512045 | 68 | |
b2ec7ea7 | 69 | return prop ? true : false; |
9e512045 SG |
70 | } |
71 | ||
72 | const char *ofnode_read_string(ofnode node, const char *propname) | |
73 | { | |
74 | const char *str = NULL; | |
75 | int len = -1; | |
76 | ||
77 | assert(ofnode_valid(node)); | |
78 | debug("%s: %s: ", __func__, propname); | |
79 | ||
80 | if (ofnode_is_np(node)) { | |
81 | struct property *prop = of_find_property( | |
82 | ofnode_to_np(node), propname, NULL); | |
83 | ||
84 | if (prop) { | |
85 | str = prop->value; | |
86 | len = prop->length; | |
87 | } | |
88 | } else { | |
89 | str = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), | |
90 | propname, &len); | |
91 | } | |
92 | if (!str) { | |
93 | debug("<not found>\n"); | |
94 | return NULL; | |
95 | } | |
96 | if (strnlen(str, len) >= len) { | |
97 | debug("<invalid>\n"); | |
98 | return NULL; | |
99 | } | |
100 | debug("%s\n", str); | |
101 | ||
102 | return str; | |
103 | } | |
104 | ||
105 | ofnode ofnode_find_subnode(ofnode node, const char *subnode_name) | |
106 | { | |
107 | ofnode subnode; | |
108 | ||
109 | assert(ofnode_valid(node)); | |
110 | debug("%s: %s: ", __func__, subnode_name); | |
111 | ||
112 | if (ofnode_is_np(node)) { | |
113 | const struct device_node *np = ofnode_to_np(node); | |
114 | ||
115 | for (np = np->child; np; np = np->sibling) { | |
116 | if (!strcmp(subnode_name, np->name)) | |
117 | break; | |
118 | } | |
119 | subnode = np_to_ofnode(np); | |
120 | } else { | |
121 | int ooffset = fdt_subnode_offset(gd->fdt_blob, | |
122 | ofnode_to_offset(node), subnode_name); | |
123 | subnode = offset_to_ofnode(ooffset); | |
124 | } | |
125 | debug("%s\n", ofnode_valid(subnode) ? | |
126 | ofnode_get_name(subnode) : "<none>"); | |
127 | ||
128 | return subnode; | |
129 | } | |
130 | ||
131 | int ofnode_read_u32_array(ofnode node, const char *propname, | |
132 | u32 *out_values, size_t sz) | |
133 | { | |
134 | assert(ofnode_valid(node)); | |
135 | debug("%s: %s: ", __func__, propname); | |
136 | ||
137 | if (ofnode_is_np(node)) { | |
138 | return of_read_u32_array(ofnode_to_np(node), propname, | |
139 | out_values, sz); | |
140 | } else { | |
141 | return fdtdec_get_int_array(gd->fdt_blob, | |
142 | ofnode_to_offset(node), propname, | |
143 | out_values, sz); | |
144 | } | |
145 | } | |
146 | ||
147 | ofnode ofnode_first_subnode(ofnode node) | |
148 | { | |
149 | assert(ofnode_valid(node)); | |
150 | if (ofnode_is_np(node)) | |
151 | return np_to_ofnode(node.np->child); | |
152 | ||
153 | return offset_to_ofnode( | |
154 | fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node))); | |
155 | } | |
156 | ||
157 | ofnode ofnode_next_subnode(ofnode node) | |
158 | { | |
159 | assert(ofnode_valid(node)); | |
160 | if (ofnode_is_np(node)) | |
161 | return np_to_ofnode(node.np->sibling); | |
162 | ||
163 | return offset_to_ofnode( | |
164 | fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node))); | |
165 | } | |
166 | ||
167 | const char *ofnode_get_name(ofnode node) | |
168 | { | |
169 | assert(ofnode_valid(node)); | |
170 | if (ofnode_is_np(node)) | |
171 | return strrchr(node.np->full_name, '/') + 1; | |
172 | ||
173 | return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL); | |
174 | } | |
175 | ||
176 | int ofnode_read_size(ofnode node, const char *propname) | |
177 | { | |
178 | int len; | |
179 | ||
180 | if (ofnode_is_np(node)) { | |
181 | struct property *prop = of_find_property( | |
182 | ofnode_to_np(node), propname, NULL); | |
183 | ||
184 | if (prop) | |
185 | return prop->length; | |
186 | } else { | |
187 | if (fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname, | |
188 | &len)) | |
189 | return len; | |
190 | } | |
191 | ||
192 | return -EINVAL; | |
193 | } | |
194 | ||
bed77496 SG |
195 | fdt_addr_t ofnode_get_addr_index(ofnode node, int index) |
196 | { | |
197 | if (ofnode_is_np(node)) { | |
198 | const __be32 *prop_val; | |
199 | uint flags; | |
200 | u64 size; | |
201 | ||
202 | prop_val = of_get_address( | |
203 | (struct device_node *)ofnode_to_np(node), index, | |
204 | &size, &flags); | |
205 | if (!prop_val) | |
206 | return FDT_ADDR_T_NONE; | |
207 | return be32_to_cpup(prop_val); | |
208 | } else { | |
209 | return fdt_get_base_address(gd->fdt_blob, | |
210 | ofnode_to_offset(node)); | |
211 | } | |
212 | ||
213 | return FDT_ADDR_T_NONE; | |
214 | } | |
215 | ||
216 | fdt_addr_t ofnode_get_addr(ofnode node) | |
217 | { | |
218 | return ofnode_get_addr_index(node, 0); | |
219 | } | |
220 | ||
9e512045 SG |
221 | int ofnode_stringlist_search(ofnode node, const char *property, |
222 | const char *string) | |
223 | { | |
224 | if (ofnode_is_np(node)) { | |
225 | return of_property_match_string(ofnode_to_np(node), | |
226 | property, string); | |
227 | } else { | |
228 | int ret; | |
229 | ||
230 | ret = fdt_stringlist_search(gd->fdt_blob, | |
231 | ofnode_to_offset(node), property, | |
232 | string); | |
233 | if (ret == -FDT_ERR_NOTFOUND) | |
234 | return -ENODATA; | |
235 | else if (ret < 0) | |
236 | return -EINVAL; | |
237 | ||
238 | return ret; | |
239 | } | |
240 | } | |
241 | ||
242 | int ofnode_read_string_index(ofnode node, const char *property, int index, | |
243 | const char **outp) | |
244 | { | |
245 | if (ofnode_is_np(node)) { | |
246 | return of_property_read_string_index(ofnode_to_np(node), | |
247 | property, index, outp); | |
248 | } else { | |
249 | int len; | |
250 | ||
251 | *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node), | |
252 | property, index, &len); | |
253 | if (len < 0) | |
254 | return -EINVAL; | |
255 | return 0; | |
256 | } | |
257 | } | |
258 | ||
8c293d6a SG |
259 | int ofnode_read_string_count(ofnode node, const char *property) |
260 | { | |
261 | if (ofnode_is_np(node)) { | |
262 | return of_property_count_strings(ofnode_to_np(node), property); | |
263 | } else { | |
264 | return fdt_stringlist_count(gd->fdt_blob, | |
265 | ofnode_to_offset(node), property); | |
266 | } | |
267 | } | |
268 | ||
9e512045 SG |
269 | static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in, |
270 | struct ofnode_phandle_args *out) | |
271 | { | |
272 | assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); | |
273 | out->node = offset_to_ofnode(in->node); | |
274 | out->args_count = in->args_count; | |
275 | memcpy(out->args, in->args, sizeof(out->args)); | |
276 | } | |
277 | ||
278 | static void ofnode_from_of_phandle_args(struct of_phandle_args *in, | |
279 | struct ofnode_phandle_args *out) | |
280 | { | |
281 | assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS); | |
282 | out->node = np_to_ofnode(in->np); | |
283 | out->args_count = in->args_count; | |
284 | memcpy(out->args, in->args, sizeof(out->args)); | |
285 | } | |
286 | ||
287 | int ofnode_parse_phandle_with_args(ofnode node, const char *list_name, | |
288 | const char *cells_name, int cell_count, | |
289 | int index, | |
290 | struct ofnode_phandle_args *out_args) | |
291 | { | |
292 | if (ofnode_is_np(node)) { | |
293 | struct of_phandle_args args; | |
294 | int ret; | |
295 | ||
296 | ret = of_parse_phandle_with_args(ofnode_to_np(node), | |
297 | list_name, cells_name, index, &args); | |
298 | if (ret) | |
299 | return ret; | |
300 | ofnode_from_of_phandle_args(&args, out_args); | |
301 | } else { | |
302 | struct fdtdec_phandle_args args; | |
303 | int ret; | |
304 | ||
305 | ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, | |
306 | ofnode_to_offset(node), list_name, cells_name, | |
307 | cell_count, index, &args); | |
308 | if (ret) | |
309 | return ret; | |
310 | ofnode_from_fdtdec_phandle_args(&args, out_args); | |
311 | } | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | ofnode ofnode_path(const char *path) | |
317 | { | |
318 | if (of_live_active()) | |
319 | return np_to_ofnode(of_find_node_by_path(path)); | |
320 | else | |
321 | return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path)); | |
322 | } | |
323 | ||
324 | const char *ofnode_get_chosen_prop(const char *name) | |
325 | { | |
326 | ofnode chosen_node; | |
327 | ||
328 | chosen_node = ofnode_path("/chosen"); | |
329 | ||
330 | return ofnode_read_string(chosen_node, name); | |
331 | } | |
332 | ||
333 | ofnode ofnode_get_chosen_node(const char *name) | |
334 | { | |
335 | const char *prop; | |
336 | ||
337 | prop = ofnode_get_chosen_prop(name); | |
338 | if (!prop) | |
339 | return ofnode_null(); | |
340 | ||
341 | return ofnode_path(prop); | |
342 | } | |
343 | ||
344 | static int decode_timing_property(ofnode node, const char *name, | |
345 | struct timing_entry *result) | |
346 | { | |
347 | int length, ret = 0; | |
348 | ||
349 | length = ofnode_read_size(node, name); | |
350 | if (length < 0) { | |
351 | debug("%s: could not find property %s\n", | |
352 | ofnode_get_name(node), name); | |
353 | return length; | |
354 | } | |
355 | ||
356 | if (length == sizeof(u32)) { | |
357 | result->typ = ofnode_read_u32_default(node, name, 0); | |
358 | result->min = result->typ; | |
359 | result->max = result->typ; | |
360 | } else { | |
361 | ret = ofnode_read_u32_array(node, name, &result->min, 3); | |
362 | } | |
363 | ||
364 | return ret; | |
365 | } | |
366 | ||
367 | int ofnode_decode_display_timing(ofnode parent, int index, | |
368 | struct display_timing *dt) | |
369 | { | |
370 | int i; | |
371 | ofnode timings, node; | |
372 | u32 val = 0; | |
373 | int ret = 0; | |
374 | ||
375 | timings = ofnode_find_subnode(parent, "display-timings"); | |
376 | if (!ofnode_valid(timings)) | |
377 | return -EINVAL; | |
378 | ||
379 | for (i = 0, node = ofnode_first_subnode(timings); | |
380 | ofnode_valid(node) && i != index; | |
381 | node = ofnode_first_subnode(node)) | |
382 | i++; | |
383 | ||
384 | if (!ofnode_valid(node)) | |
385 | return -EINVAL; | |
386 | ||
387 | memset(dt, 0, sizeof(*dt)); | |
388 | ||
389 | ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch); | |
390 | ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch); | |
391 | ret |= decode_timing_property(node, "hactive", &dt->hactive); | |
392 | ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len); | |
393 | ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch); | |
394 | ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch); | |
395 | ret |= decode_timing_property(node, "vactive", &dt->vactive); | |
396 | ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len); | |
397 | ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock); | |
398 | ||
399 | dt->flags = 0; | |
400 | val = ofnode_read_u32_default(node, "vsync-active", -1); | |
401 | if (val != -1) { | |
402 | dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH : | |
403 | DISPLAY_FLAGS_VSYNC_LOW; | |
404 | } | |
405 | val = ofnode_read_u32_default(node, "hsync-active", -1); | |
406 | if (val != -1) { | |
407 | dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH : | |
408 | DISPLAY_FLAGS_HSYNC_LOW; | |
409 | } | |
410 | val = ofnode_read_u32_default(node, "de-active", -1); | |
411 | if (val != -1) { | |
412 | dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH : | |
413 | DISPLAY_FLAGS_DE_LOW; | |
414 | } | |
415 | val = ofnode_read_u32_default(node, "pixelclk-active", -1); | |
416 | if (val != -1) { | |
417 | dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE : | |
418 | DISPLAY_FLAGS_PIXDATA_NEGEDGE; | |
419 | } | |
420 | ||
421 | if (ofnode_read_bool(node, "interlaced")) | |
422 | dt->flags |= DISPLAY_FLAGS_INTERLACED; | |
423 | if (ofnode_read_bool(node, "doublescan")) | |
424 | dt->flags |= DISPLAY_FLAGS_DOUBLESCAN; | |
425 | if (ofnode_read_bool(node, "doubleclk")) | |
426 | dt->flags |= DISPLAY_FLAGS_DOUBLECLK; | |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
61e51bab | 431 | const void *ofnode_get_property(ofnode node, const char *propname, int *lenp) |
9e512045 | 432 | { |
cb7dbe1f MY |
433 | if (ofnode_is_np(node)) |
434 | return of_get_property(ofnode_to_np(node), propname, lenp); | |
435 | else | |
9e512045 SG |
436 | return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), |
437 | propname, lenp); | |
9e512045 SG |
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); | |
a4b8e372 SG |
460 | *sizep = of_read_number(prop + na, ns); |
461 | return of_read_number(prop, na); | |
9e512045 SG |
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 | */ | |
61e51bab | 502 | cell = ofnode_get_property(node, propname, &len); |
9e512045 SG |
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)); | |
878d68c0 | 545 | else /* NOTE: this call should walk up the parent stack */ |
9e512045 SG |
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)); | |
878d68c0 SG |
553 | else /* NOTE: this call should walk up the parent stack */ |
554 | return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); | |
555 | } | |
556 | ||
557 | int ofnode_read_simple_addr_cells(ofnode node) | |
558 | { | |
559 | if (ofnode_is_np(node)) | |
560 | return of_simple_addr_cells(ofnode_to_np(node)); | |
561 | else | |
562 | return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node)); | |
563 | } | |
564 | ||
565 | int ofnode_read_simple_size_cells(ofnode node) | |
566 | { | |
567 | if (ofnode_is_np(node)) | |
568 | return of_simple_size_cells(ofnode_to_np(node)); | |
9e512045 SG |
569 | else |
570 | return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node)); | |
571 | } | |
572 | ||
573 | bool ofnode_pre_reloc(ofnode node) | |
574 | { | |
252510ac | 575 | if (ofnode_read_bool(node, "u-boot,dm-pre-reloc")) |
9e512045 SG |
576 | return true; |
577 | ||
578 | #ifdef CONFIG_TPL_BUILD | |
252510ac | 579 | if (ofnode_read_bool(node, "u-boot,dm-tpl")) |
9e512045 SG |
580 | return true; |
581 | #elif defined(CONFIG_SPL_BUILD) | |
252510ac | 582 | if (ofnode_read_bool(node, "u-boot,dm-spl")) |
9e512045 SG |
583 | return true; |
584 | #else | |
585 | /* | |
586 | * In regular builds individual spl and tpl handling both | |
587 | * count as handled pre-relocation for later second init. | |
588 | */ | |
252510ac MY |
589 | if (ofnode_read_bool(node, "u-boot,dm-spl") || |
590 | ofnode_read_bool(node, "u-boot,dm-tpl")) | |
9e512045 SG |
591 | return true; |
592 | #endif | |
593 | ||
594 | return false; | |
595 | } |