ofnode.c 24 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (c) 2017 Google, Inc
  4. * Written by Simon Glass <sjg@chromium.org>
  5. */
  6. #include <common.h>
  7. #include <dm.h>
  8. #include <fdtdec.h>
  9. #include <fdt_support.h>
  10. #include <log.h>
  11. #include <malloc.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>
  18. #include <asm/global_data.h>
  19. int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
  20. {
  21. return ofnode_read_u32_index(node, propname, 0, outp);
  22. }
  23. u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
  24. {
  25. assert(ofnode_valid(node));
  26. ofnode_read_u32_index(node, propname, 0, &def);
  27. return def;
  28. }
  29. int ofnode_read_u32_index(ofnode node, const char *propname, int index,
  30. u32 *outp)
  31. {
  32. const fdt32_t *cell;
  33. int len;
  34. assert(ofnode_valid(node));
  35. debug("%s: %s: ", __func__, propname);
  36. if (ofnode_is_np(node))
  37. return of_read_u32_index(ofnode_to_np(node), propname, index,
  38. outp);
  39. cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  40. &len);
  41. if (!cell) {
  42. debug("(not found)\n");
  43. return -EINVAL;
  44. }
  45. if (len < (sizeof(int) * (index + 1))) {
  46. debug("(not large enough)\n");
  47. return -EOVERFLOW;
  48. }
  49. *outp = fdt32_to_cpu(cell[index]);
  50. debug("%#x (%d)\n", *outp, *outp);
  51. return 0;
  52. }
  53. u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
  54. u32 def)
  55. {
  56. assert(ofnode_valid(node));
  57. ofnode_read_u32_index(node, propname, index, &def);
  58. return def;
  59. }
  60. int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
  61. {
  62. assert(ofnode_valid(node));
  63. ofnode_read_u32(node, propname, (u32 *)&def);
  64. return def;
  65. }
  66. int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
  67. {
  68. const unaligned_fdt64_t *cell;
  69. int len;
  70. assert(ofnode_valid(node));
  71. debug("%s: %s: ", __func__, propname);
  72. if (ofnode_is_np(node))
  73. return of_read_u64(ofnode_to_np(node), propname, outp);
  74. cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  75. &len);
  76. if (!cell || len < sizeof(*cell)) {
  77. debug("(not found)\n");
  78. return -EINVAL;
  79. }
  80. *outp = fdt64_to_cpu(cell[0]);
  81. debug("%#llx (%lld)\n", (unsigned long long)*outp,
  82. (unsigned long long)*outp);
  83. return 0;
  84. }
  85. u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
  86. {
  87. assert(ofnode_valid(node));
  88. ofnode_read_u64(node, propname, &def);
  89. return def;
  90. }
  91. bool ofnode_read_bool(ofnode node, const char *propname)
  92. {
  93. const void *prop;
  94. assert(ofnode_valid(node));
  95. debug("%s: %s: ", __func__, propname);
  96. prop = ofnode_get_property(node, propname, NULL);
  97. debug("%s\n", prop ? "true" : "false");
  98. return prop ? true : false;
  99. }
  100. const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
  101. {
  102. const char *val = NULL;
  103. int len;
  104. assert(ofnode_valid(node));
  105. debug("%s: %s: ", __func__, propname);
  106. if (ofnode_is_np(node)) {
  107. struct property *prop = of_find_property(
  108. ofnode_to_np(node), propname, &len);
  109. if (prop) {
  110. val = prop->value;
  111. len = prop->length;
  112. }
  113. } else {
  114. val = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
  115. propname, &len);
  116. }
  117. if (!val) {
  118. debug("<not found>\n");
  119. if (sizep)
  120. *sizep = -FDT_ERR_NOTFOUND;
  121. return NULL;
  122. }
  123. if (sizep)
  124. *sizep = len;
  125. return val;
  126. }
  127. const char *ofnode_read_string(ofnode node, const char *propname)
  128. {
  129. const char *str;
  130. int len;
  131. str = ofnode_read_prop(node, propname, &len);
  132. if (!str)
  133. return NULL;
  134. if (strnlen(str, len) >= len) {
  135. debug("<invalid>\n");
  136. return NULL;
  137. }
  138. debug("%s\n", str);
  139. return str;
  140. }
  141. int ofnode_read_size(ofnode node, const char *propname)
  142. {
  143. int len;
  144. if (!ofnode_read_prop(node, propname, &len))
  145. return -EINVAL;
  146. return len;
  147. }
  148. ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
  149. {
  150. ofnode subnode;
  151. assert(ofnode_valid(node));
  152. debug("%s: %s: ", __func__, subnode_name);
  153. if (ofnode_is_np(node)) {
  154. const struct device_node *np = ofnode_to_np(node);
  155. for (np = np->child; np; np = np->sibling) {
  156. if (!strcmp(subnode_name, np->name))
  157. break;
  158. }
  159. subnode = np_to_ofnode(np);
  160. } else {
  161. int ooffset = fdt_subnode_offset(gd->fdt_blob,
  162. ofnode_to_offset(node), subnode_name);
  163. subnode = offset_to_ofnode(ooffset);
  164. }
  165. debug("%s\n", ofnode_valid(subnode) ?
  166. ofnode_get_name(subnode) : "<none>");
  167. return subnode;
  168. }
  169. int ofnode_read_u32_array(ofnode node, const char *propname,
  170. u32 *out_values, size_t sz)
  171. {
  172. assert(ofnode_valid(node));
  173. debug("%s: %s: ", __func__, propname);
  174. if (ofnode_is_np(node)) {
  175. return of_read_u32_array(ofnode_to_np(node), propname,
  176. out_values, sz);
  177. } else {
  178. return fdtdec_get_int_array(gd->fdt_blob,
  179. ofnode_to_offset(node), propname,
  180. out_values, sz);
  181. }
  182. }
  183. #if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
  184. bool ofnode_is_enabled(ofnode node)
  185. {
  186. if (ofnode_is_np(node)) {
  187. return of_device_is_available(ofnode_to_np(node));
  188. } else {
  189. return fdtdec_get_is_enabled(gd->fdt_blob,
  190. ofnode_to_offset(node));
  191. }
  192. }
  193. ofnode ofnode_first_subnode(ofnode node)
  194. {
  195. assert(ofnode_valid(node));
  196. if (ofnode_is_np(node))
  197. return np_to_ofnode(node.np->child);
  198. return offset_to_ofnode(
  199. fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
  200. }
  201. ofnode ofnode_next_subnode(ofnode node)
  202. {
  203. assert(ofnode_valid(node));
  204. if (ofnode_is_np(node))
  205. return np_to_ofnode(node.np->sibling);
  206. return offset_to_ofnode(
  207. fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
  208. }
  209. #endif /* !DM_INLINE_OFNODE */
  210. ofnode ofnode_get_parent(ofnode node)
  211. {
  212. ofnode parent;
  213. assert(ofnode_valid(node));
  214. if (ofnode_is_np(node))
  215. parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
  216. else
  217. parent.of_offset = fdt_parent_offset(gd->fdt_blob,
  218. ofnode_to_offset(node));
  219. return parent;
  220. }
  221. const char *ofnode_get_name(ofnode node)
  222. {
  223. if (!ofnode_valid(node)) {
  224. debug("%s node not valid\n", __func__);
  225. return NULL;
  226. }
  227. if (ofnode_is_np(node))
  228. return strrchr(node.np->full_name, '/') + 1;
  229. return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
  230. }
  231. int ofnode_get_path(ofnode node, char *buf, int buflen)
  232. {
  233. assert(ofnode_valid(node));
  234. if (ofnode_is_np(node)) {
  235. if (strlen(node.np->full_name) >= buflen)
  236. return -ENOSPC;
  237. strcpy(buf, node.np->full_name);
  238. return 0;
  239. } else {
  240. int res;
  241. res = fdt_get_path(gd->fdt_blob, ofnode_to_offset(node), buf,
  242. buflen);
  243. if (!res)
  244. return res;
  245. else if (res == -FDT_ERR_NOSPACE)
  246. return -ENOSPC;
  247. else
  248. return -EINVAL;
  249. }
  250. }
  251. ofnode ofnode_get_by_phandle(uint phandle)
  252. {
  253. ofnode node;
  254. if (of_live_active())
  255. node = np_to_ofnode(of_find_node_by_phandle(phandle));
  256. else
  257. node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
  258. phandle);
  259. return node;
  260. }
  261. static fdt_addr_t __ofnode_get_addr_size_index(ofnode node, int index,
  262. fdt_size_t *size, bool translate)
  263. {
  264. int na, ns;
  265. if (size)
  266. *size = FDT_SIZE_T_NONE;
  267. if (ofnode_is_np(node)) {
  268. const __be32 *prop_val;
  269. u64 size64;
  270. uint flags;
  271. prop_val = of_get_address(ofnode_to_np(node), index, &size64,
  272. &flags);
  273. if (!prop_val)
  274. return FDT_ADDR_T_NONE;
  275. if (size)
  276. *size = size64;
  277. ns = of_n_size_cells(ofnode_to_np(node));
  278. if (translate && IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
  279. return of_translate_address(ofnode_to_np(node), prop_val);
  280. } else {
  281. na = of_n_addr_cells(ofnode_to_np(node));
  282. return of_read_number(prop_val, na);
  283. }
  284. } else {
  285. na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
  286. ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
  287. return fdtdec_get_addr_size_fixed(gd->fdt_blob,
  288. ofnode_to_offset(node), "reg",
  289. index, na, ns, size,
  290. translate);
  291. }
  292. }
  293. fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
  294. {
  295. return __ofnode_get_addr_size_index(node, index, size, true);
  296. }
  297. fdt_addr_t ofnode_get_addr_size_index_notrans(ofnode node, int index,
  298. fdt_size_t *size)
  299. {
  300. return __ofnode_get_addr_size_index(node, index, size, false);
  301. }
  302. fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
  303. {
  304. fdt_size_t size;
  305. return ofnode_get_addr_size_index(node, index, &size);
  306. }
  307. fdt_addr_t ofnode_get_addr(ofnode node)
  308. {
  309. return ofnode_get_addr_index(node, 0);
  310. }
  311. fdt_size_t ofnode_get_size(ofnode node)
  312. {
  313. fdt_size_t size;
  314. ofnode_get_addr_size_index(node, 0, &size);
  315. return size;
  316. }
  317. int ofnode_stringlist_search(ofnode node, const char *property,
  318. const char *string)
  319. {
  320. if (ofnode_is_np(node)) {
  321. return of_property_match_string(ofnode_to_np(node),
  322. property, string);
  323. } else {
  324. int ret;
  325. ret = fdt_stringlist_search(gd->fdt_blob,
  326. ofnode_to_offset(node), property,
  327. string);
  328. if (ret == -FDT_ERR_NOTFOUND)
  329. return -ENODATA;
  330. else if (ret < 0)
  331. return -EINVAL;
  332. return ret;
  333. }
  334. }
  335. int ofnode_read_string_index(ofnode node, const char *property, int index,
  336. const char **outp)
  337. {
  338. if (ofnode_is_np(node)) {
  339. return of_property_read_string_index(ofnode_to_np(node),
  340. property, index, outp);
  341. } else {
  342. int len;
  343. *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
  344. property, index, &len);
  345. if (len < 0)
  346. return -EINVAL;
  347. return 0;
  348. }
  349. }
  350. int ofnode_read_string_count(ofnode node, const char *property)
  351. {
  352. if (ofnode_is_np(node)) {
  353. return of_property_count_strings(ofnode_to_np(node), property);
  354. } else {
  355. return fdt_stringlist_count(gd->fdt_blob,
  356. ofnode_to_offset(node), property);
  357. }
  358. }
  359. static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
  360. struct ofnode_phandle_args *out)
  361. {
  362. assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
  363. out->node = offset_to_ofnode(in->node);
  364. out->args_count = in->args_count;
  365. memcpy(out->args, in->args, sizeof(out->args));
  366. }
  367. static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
  368. struct ofnode_phandle_args *out)
  369. {
  370. assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
  371. out->node = np_to_ofnode(in->np);
  372. out->args_count = in->args_count;
  373. memcpy(out->args, in->args, sizeof(out->args));
  374. }
  375. int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
  376. const char *cells_name, int cell_count,
  377. int index,
  378. struct ofnode_phandle_args *out_args)
  379. {
  380. if (ofnode_is_np(node)) {
  381. struct of_phandle_args args;
  382. int ret;
  383. ret = of_parse_phandle_with_args(ofnode_to_np(node),
  384. list_name, cells_name,
  385. cell_count, index,
  386. &args);
  387. if (ret)
  388. return ret;
  389. ofnode_from_of_phandle_args(&args, out_args);
  390. } else {
  391. struct fdtdec_phandle_args args;
  392. int ret;
  393. ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
  394. ofnode_to_offset(node),
  395. list_name, cells_name,
  396. cell_count, index, &args);
  397. if (ret)
  398. return ret;
  399. ofnode_from_fdtdec_phandle_args(&args, out_args);
  400. }
  401. return 0;
  402. }
  403. int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
  404. const char *cells_name, int cell_count)
  405. {
  406. if (ofnode_is_np(node))
  407. return of_count_phandle_with_args(ofnode_to_np(node),
  408. list_name, cells_name, cell_count);
  409. else
  410. return fdtdec_parse_phandle_with_args(gd->fdt_blob,
  411. ofnode_to_offset(node), list_name, cells_name,
  412. cell_count, -1, NULL);
  413. }
  414. ofnode ofnode_path(const char *path)
  415. {
  416. if (of_live_active())
  417. return np_to_ofnode(of_find_node_by_path(path));
  418. else
  419. return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
  420. }
  421. const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
  422. {
  423. ofnode chosen_node;
  424. chosen_node = ofnode_path("/chosen");
  425. return ofnode_read_prop(chosen_node, propname, sizep);
  426. }
  427. const char *ofnode_read_chosen_string(const char *propname)
  428. {
  429. return ofnode_read_chosen_prop(propname, NULL);
  430. }
  431. ofnode ofnode_get_chosen_node(const char *name)
  432. {
  433. const char *prop;
  434. prop = ofnode_read_chosen_prop(name, NULL);
  435. if (!prop)
  436. return ofnode_null();
  437. return ofnode_path(prop);
  438. }
  439. const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
  440. {
  441. ofnode node;
  442. node = ofnode_path("/aliases");
  443. return ofnode_read_prop(node, propname, sizep);
  444. }
  445. ofnode ofnode_get_aliases_node(const char *name)
  446. {
  447. const char *prop;
  448. prop = ofnode_read_aliases_prop(name, NULL);
  449. if (!prop)
  450. return ofnode_null();
  451. debug("%s: node_path: %s\n", __func__, prop);
  452. return ofnode_path(prop);
  453. }
  454. int ofnode_get_child_count(ofnode parent)
  455. {
  456. ofnode child;
  457. int num = 0;
  458. ofnode_for_each_subnode(child, parent)
  459. num++;
  460. return num;
  461. }
  462. static int decode_timing_property(ofnode node, const char *name,
  463. struct timing_entry *result)
  464. {
  465. int length, ret = 0;
  466. length = ofnode_read_size(node, name);
  467. if (length < 0) {
  468. debug("%s: could not find property %s\n",
  469. ofnode_get_name(node), name);
  470. return length;
  471. }
  472. if (length == sizeof(u32)) {
  473. result->typ = ofnode_read_u32_default(node, name, 0);
  474. result->min = result->typ;
  475. result->max = result->typ;
  476. } else {
  477. ret = ofnode_read_u32_array(node, name, &result->min, 3);
  478. }
  479. return ret;
  480. }
  481. int ofnode_decode_display_timing(ofnode parent, int index,
  482. struct display_timing *dt)
  483. {
  484. int i;
  485. ofnode timings, node;
  486. u32 val = 0;
  487. int ret = 0;
  488. timings = ofnode_find_subnode(parent, "display-timings");
  489. if (!ofnode_valid(timings))
  490. return -EINVAL;
  491. i = 0;
  492. ofnode_for_each_subnode(node, timings) {
  493. if (i++ == index)
  494. break;
  495. }
  496. if (!ofnode_valid(node))
  497. return -EINVAL;
  498. memset(dt, 0, sizeof(*dt));
  499. ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
  500. ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
  501. ret |= decode_timing_property(node, "hactive", &dt->hactive);
  502. ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
  503. ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
  504. ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
  505. ret |= decode_timing_property(node, "vactive", &dt->vactive);
  506. ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
  507. ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
  508. dt->flags = 0;
  509. val = ofnode_read_u32_default(node, "vsync-active", -1);
  510. if (val != -1) {
  511. dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
  512. DISPLAY_FLAGS_VSYNC_LOW;
  513. }
  514. val = ofnode_read_u32_default(node, "hsync-active", -1);
  515. if (val != -1) {
  516. dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
  517. DISPLAY_FLAGS_HSYNC_LOW;
  518. }
  519. val = ofnode_read_u32_default(node, "de-active", -1);
  520. if (val != -1) {
  521. dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
  522. DISPLAY_FLAGS_DE_LOW;
  523. }
  524. val = ofnode_read_u32_default(node, "pixelclk-active", -1);
  525. if (val != -1) {
  526. dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
  527. DISPLAY_FLAGS_PIXDATA_NEGEDGE;
  528. }
  529. if (ofnode_read_bool(node, "interlaced"))
  530. dt->flags |= DISPLAY_FLAGS_INTERLACED;
  531. if (ofnode_read_bool(node, "doublescan"))
  532. dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
  533. if (ofnode_read_bool(node, "doubleclk"))
  534. dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
  535. return ret;
  536. }
  537. const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
  538. {
  539. if (ofnode_is_np(node))
  540. return of_get_property(ofnode_to_np(node), propname, lenp);
  541. else
  542. return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
  543. propname, lenp);
  544. }
  545. int ofnode_get_first_property(ofnode node, struct ofprop *prop)
  546. {
  547. prop->node = node;
  548. if (ofnode_is_np(node)) {
  549. prop->prop = of_get_first_property(ofnode_to_np(prop->node));
  550. if (!prop->prop)
  551. return -FDT_ERR_NOTFOUND;
  552. } else {
  553. prop->offset =
  554. fdt_first_property_offset(gd->fdt_blob,
  555. ofnode_to_offset(prop->node));
  556. if (prop->offset < 0)
  557. return prop->offset;
  558. }
  559. return 0;
  560. }
  561. int ofnode_get_next_property(struct ofprop *prop)
  562. {
  563. if (ofnode_is_np(prop->node)) {
  564. prop->prop = of_get_next_property(ofnode_to_np(prop->node),
  565. prop->prop);
  566. if (!prop->prop)
  567. return -FDT_ERR_NOTFOUND;
  568. } else {
  569. prop->offset = fdt_next_property_offset(gd->fdt_blob,
  570. prop->offset);
  571. if (prop->offset < 0)
  572. return prop->offset;
  573. }
  574. return 0;
  575. }
  576. const void *ofnode_get_property_by_prop(const struct ofprop *prop,
  577. const char **propname, int *lenp)
  578. {
  579. if (ofnode_is_np(prop->node))
  580. return of_get_property_by_prop(ofnode_to_np(prop->node),
  581. prop->prop, propname, lenp);
  582. else
  583. return fdt_getprop_by_offset(gd->fdt_blob,
  584. prop->offset,
  585. propname, lenp);
  586. }
  587. bool ofnode_is_available(ofnode node)
  588. {
  589. if (ofnode_is_np(node))
  590. return of_device_is_available(ofnode_to_np(node));
  591. else
  592. return fdtdec_get_is_enabled(gd->fdt_blob,
  593. ofnode_to_offset(node));
  594. }
  595. fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
  596. fdt_size_t *sizep)
  597. {
  598. if (ofnode_is_np(node)) {
  599. int na, ns;
  600. int psize;
  601. const struct device_node *np = ofnode_to_np(node);
  602. const __be32 *prop = of_get_property(np, property, &psize);
  603. if (!prop)
  604. return FDT_ADDR_T_NONE;
  605. na = of_n_addr_cells(np);
  606. ns = of_n_size_cells(np);
  607. *sizep = of_read_number(prop + na, ns);
  608. if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
  609. return of_translate_address(np, prop);
  610. else
  611. return of_read_number(prop, na);
  612. } else {
  613. return fdtdec_get_addr_size(gd->fdt_blob,
  614. ofnode_to_offset(node), property,
  615. sizep);
  616. }
  617. }
  618. const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
  619. size_t sz)
  620. {
  621. if (ofnode_is_np(node)) {
  622. const struct device_node *np = ofnode_to_np(node);
  623. int psize;
  624. const __be32 *prop = of_get_property(np, propname, &psize);
  625. if (!prop || sz != psize)
  626. return NULL;
  627. return (uint8_t *)prop;
  628. } else {
  629. return fdtdec_locate_byte_array(gd->fdt_blob,
  630. ofnode_to_offset(node), propname, sz);
  631. }
  632. }
  633. int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
  634. const char *propname, struct fdt_pci_addr *addr)
  635. {
  636. const fdt32_t *cell;
  637. int len;
  638. int ret = -ENOENT;
  639. debug("%s: %s: ", __func__, propname);
  640. /*
  641. * If we follow the pci bus bindings strictly, we should check
  642. * the value of the node's parent node's #address-cells and
  643. * #size-cells. They need to be 3 and 2 accordingly. However,
  644. * for simplicity we skip the check here.
  645. */
  646. cell = ofnode_get_property(node, propname, &len);
  647. if (!cell)
  648. goto fail;
  649. if ((len % FDT_PCI_REG_SIZE) == 0) {
  650. int num = len / FDT_PCI_REG_SIZE;
  651. int i;
  652. for (i = 0; i < num; i++) {
  653. debug("pci address #%d: %08lx %08lx %08lx\n", i,
  654. (ulong)fdt32_to_cpu(cell[0]),
  655. (ulong)fdt32_to_cpu(cell[1]),
  656. (ulong)fdt32_to_cpu(cell[2]));
  657. if ((fdt32_to_cpu(*cell) & type) == type) {
  658. addr->phys_hi = fdt32_to_cpu(cell[0]);
  659. addr->phys_mid = fdt32_to_cpu(cell[1]);
  660. addr->phys_lo = fdt32_to_cpu(cell[2]);
  661. break;
  662. }
  663. cell += (FDT_PCI_ADDR_CELLS +
  664. FDT_PCI_SIZE_CELLS);
  665. }
  666. if (i == num) {
  667. ret = -ENXIO;
  668. goto fail;
  669. }
  670. return 0;
  671. }
  672. ret = -EINVAL;
  673. fail:
  674. debug("(not found)\n");
  675. return ret;
  676. }
  677. int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
  678. {
  679. const char *list, *end;
  680. int len;
  681. list = ofnode_get_property(node, "compatible", &len);
  682. if (!list)
  683. return -ENOENT;
  684. end = list + len;
  685. while (list < end) {
  686. len = strlen(list);
  687. if (len >= strlen("pciVVVV,DDDD")) {
  688. char *s = strstr(list, "pci");
  689. /*
  690. * check if the string is something like pciVVVV,DDDD.RR
  691. * or just pciVVVV,DDDD
  692. */
  693. if (s && s[7] == ',' &&
  694. (s[12] == '.' || s[12] == 0)) {
  695. s += 3;
  696. *vendor = simple_strtol(s, NULL, 16);
  697. s += 5;
  698. *device = simple_strtol(s, NULL, 16);
  699. return 0;
  700. }
  701. }
  702. list += (len + 1);
  703. }
  704. return -ENOENT;
  705. }
  706. int ofnode_read_addr_cells(ofnode node)
  707. {
  708. if (ofnode_is_np(node)) {
  709. return of_n_addr_cells(ofnode_to_np(node));
  710. } else {
  711. int parent = fdt_parent_offset(gd->fdt_blob,
  712. ofnode_to_offset(node));
  713. return fdt_address_cells(gd->fdt_blob, parent);
  714. }
  715. }
  716. int ofnode_read_size_cells(ofnode node)
  717. {
  718. if (ofnode_is_np(node)) {
  719. return of_n_size_cells(ofnode_to_np(node));
  720. } else {
  721. int parent = fdt_parent_offset(gd->fdt_blob,
  722. ofnode_to_offset(node));
  723. return fdt_size_cells(gd->fdt_blob, parent);
  724. }
  725. }
  726. int ofnode_read_simple_addr_cells(ofnode node)
  727. {
  728. if (ofnode_is_np(node))
  729. return of_simple_addr_cells(ofnode_to_np(node));
  730. else
  731. return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
  732. }
  733. int ofnode_read_simple_size_cells(ofnode node)
  734. {
  735. if (ofnode_is_np(node))
  736. return of_simple_size_cells(ofnode_to_np(node));
  737. else
  738. return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
  739. }
  740. bool ofnode_pre_reloc(ofnode node)
  741. {
  742. #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
  743. /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
  744. * had property dm-pre-reloc or u-boot,dm-spl/tpl.
  745. * They are removed in final dtb (fdtgrep 2nd pass)
  746. */
  747. return true;
  748. #else
  749. if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
  750. return true;
  751. if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
  752. return true;
  753. /*
  754. * In regular builds individual spl and tpl handling both
  755. * count as handled pre-relocation for later second init.
  756. */
  757. if (ofnode_read_bool(node, "u-boot,dm-spl") ||
  758. ofnode_read_bool(node, "u-boot,dm-tpl"))
  759. return true;
  760. return false;
  761. #endif
  762. }
  763. int ofnode_read_resource(ofnode node, uint index, struct resource *res)
  764. {
  765. if (ofnode_is_np(node)) {
  766. return of_address_to_resource(ofnode_to_np(node), index, res);
  767. } else {
  768. struct fdt_resource fres;
  769. int ret;
  770. ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
  771. "reg", index, &fres);
  772. if (ret < 0)
  773. return -EINVAL;
  774. memset(res, '\0', sizeof(*res));
  775. res->start = fres.start;
  776. res->end = fres.end;
  777. return 0;
  778. }
  779. }
  780. int ofnode_read_resource_byname(ofnode node, const char *name,
  781. struct resource *res)
  782. {
  783. int index;
  784. index = ofnode_stringlist_search(node, "reg-names", name);
  785. if (index < 0)
  786. return index;
  787. return ofnode_read_resource(node, index, res);
  788. }
  789. u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
  790. {
  791. if (ofnode_is_np(node))
  792. return of_translate_address(ofnode_to_np(node), in_addr);
  793. else
  794. return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
  795. }
  796. u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
  797. {
  798. if (ofnode_is_np(node))
  799. return of_translate_dma_address(ofnode_to_np(node), in_addr);
  800. else
  801. return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
  802. }
  803. int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
  804. {
  805. if (ofnode_is_np(node))
  806. return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
  807. else
  808. return fdt_get_dma_range(gd->fdt_blob, ofnode_to_offset(node),
  809. cpu, bus, size);
  810. }
  811. int ofnode_device_is_compatible(ofnode node, const char *compat)
  812. {
  813. if (ofnode_is_np(node))
  814. return of_device_is_compatible(ofnode_to_np(node), compat,
  815. NULL, NULL);
  816. else
  817. return !fdt_node_check_compatible(gd->fdt_blob,
  818. ofnode_to_offset(node),
  819. compat);
  820. }
  821. ofnode ofnode_by_compatible(ofnode from, const char *compat)
  822. {
  823. if (of_live_active()) {
  824. return np_to_ofnode(of_find_compatible_node(
  825. (struct device_node *)ofnode_to_np(from), NULL,
  826. compat));
  827. } else {
  828. return offset_to_ofnode(fdt_node_offset_by_compatible(
  829. gd->fdt_blob, ofnode_to_offset(from), compat));
  830. }
  831. }
  832. ofnode ofnode_by_prop_value(ofnode from, const char *propname,
  833. const void *propval, int proplen)
  834. {
  835. if (of_live_active()) {
  836. return np_to_ofnode(of_find_node_by_prop_value(
  837. (struct device_node *)ofnode_to_np(from), propname,
  838. propval, proplen));
  839. } else {
  840. return offset_to_ofnode(fdt_node_offset_by_prop_value(
  841. gd->fdt_blob, ofnode_to_offset(from),
  842. propname, propval, proplen));
  843. }
  844. }
  845. int ofnode_write_prop(ofnode node, const char *propname, int len,
  846. const void *value)
  847. {
  848. const struct device_node *np = ofnode_to_np(node);
  849. struct property *pp;
  850. struct property *pp_last = NULL;
  851. struct property *new;
  852. if (!of_live_active())
  853. return -ENOSYS;
  854. if (!np)
  855. return -EINVAL;
  856. for (pp = np->properties; pp; pp = pp->next) {
  857. if (strcmp(pp->name, propname) == 0) {
  858. /* Property exists -> change value */
  859. pp->value = (void *)value;
  860. pp->length = len;
  861. return 0;
  862. }
  863. pp_last = pp;
  864. }
  865. if (!pp_last)
  866. return -ENOENT;
  867. /* Property does not exist -> append new property */
  868. new = malloc(sizeof(struct property));
  869. if (!new)
  870. return -ENOMEM;
  871. new->name = strdup(propname);
  872. if (!new->name) {
  873. free(new);
  874. return -ENOMEM;
  875. }
  876. new->value = (void *)value;
  877. new->length = len;
  878. new->next = NULL;
  879. pp_last->next = new;
  880. return 0;
  881. }
  882. int ofnode_write_string(ofnode node, const char *propname, const char *value)
  883. {
  884. if (!of_live_active())
  885. return -ENOSYS;
  886. assert(ofnode_valid(node));
  887. debug("%s: %s = %s", __func__, propname, value);
  888. return ofnode_write_prop(node, propname, strlen(value) + 1, value);
  889. }
  890. int ofnode_set_enabled(ofnode node, bool value)
  891. {
  892. if (!of_live_active())
  893. return -ENOSYS;
  894. assert(ofnode_valid(node));
  895. if (value)
  896. return ofnode_write_string(node, "status", "okay");
  897. else
  898. return ofnode_write_string(node, "status", "disabled");
  899. }