ofnode.c 25 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. bool ofnode_name_eq(ofnode node, const char *name)
  20. {
  21. const char *node_name;
  22. size_t len;
  23. assert(ofnode_valid(node));
  24. node_name = ofnode_get_name(node);
  25. len = strchrnul(node_name, '@') - node_name;
  26. return (strlen(name) == len) && !strncmp(node_name, name, len);
  27. }
  28. int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
  29. {
  30. return ofnode_read_u32_index(node, propname, 0, outp);
  31. }
  32. u32 ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
  33. {
  34. assert(ofnode_valid(node));
  35. ofnode_read_u32_index(node, propname, 0, &def);
  36. return def;
  37. }
  38. int ofnode_read_u32_index(ofnode node, const char *propname, int index,
  39. u32 *outp)
  40. {
  41. const fdt32_t *cell;
  42. int len;
  43. assert(ofnode_valid(node));
  44. debug("%s: %s: ", __func__, propname);
  45. if (ofnode_is_np(node))
  46. return of_read_u32_index(ofnode_to_np(node), propname, index,
  47. outp);
  48. cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  49. &len);
  50. if (!cell) {
  51. debug("(not found)\n");
  52. return -EINVAL;
  53. }
  54. if (len < (sizeof(int) * (index + 1))) {
  55. debug("(not large enough)\n");
  56. return -EOVERFLOW;
  57. }
  58. *outp = fdt32_to_cpu(cell[index]);
  59. debug("%#x (%d)\n", *outp, *outp);
  60. return 0;
  61. }
  62. u32 ofnode_read_u32_index_default(ofnode node, const char *propname, int index,
  63. u32 def)
  64. {
  65. assert(ofnode_valid(node));
  66. ofnode_read_u32_index(node, propname, index, &def);
  67. return def;
  68. }
  69. int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
  70. {
  71. assert(ofnode_valid(node));
  72. ofnode_read_u32(node, propname, (u32 *)&def);
  73. return def;
  74. }
  75. int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
  76. {
  77. const unaligned_fdt64_t *cell;
  78. int len;
  79. assert(ofnode_valid(node));
  80. debug("%s: %s: ", __func__, propname);
  81. if (ofnode_is_np(node))
  82. return of_read_u64(ofnode_to_np(node), propname, outp);
  83. cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
  84. &len);
  85. if (!cell || len < sizeof(*cell)) {
  86. debug("(not found)\n");
  87. return -EINVAL;
  88. }
  89. *outp = fdt64_to_cpu(cell[0]);
  90. debug("%#llx (%lld)\n", (unsigned long long)*outp,
  91. (unsigned long long)*outp);
  92. return 0;
  93. }
  94. u64 ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
  95. {
  96. assert(ofnode_valid(node));
  97. ofnode_read_u64(node, propname, &def);
  98. return def;
  99. }
  100. bool ofnode_read_bool(ofnode node, const char *propname)
  101. {
  102. const void *prop;
  103. assert(ofnode_valid(node));
  104. debug("%s: %s: ", __func__, propname);
  105. prop = ofnode_get_property(node, propname, NULL);
  106. debug("%s\n", prop ? "true" : "false");
  107. return prop ? true : false;
  108. }
  109. const void *ofnode_read_prop(ofnode node, const char *propname, int *sizep)
  110. {
  111. const char *val = NULL;
  112. int len;
  113. assert(ofnode_valid(node));
  114. debug("%s: %s: ", __func__, propname);
  115. if (ofnode_is_np(node)) {
  116. struct property *prop = of_find_property(
  117. ofnode_to_np(node), propname, &len);
  118. if (prop) {
  119. val = prop->value;
  120. len = prop->length;
  121. }
  122. } else {
  123. val = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
  124. propname, &len);
  125. }
  126. if (!val) {
  127. debug("<not found>\n");
  128. if (sizep)
  129. *sizep = -FDT_ERR_NOTFOUND;
  130. return NULL;
  131. }
  132. if (sizep)
  133. *sizep = len;
  134. return val;
  135. }
  136. const char *ofnode_read_string(ofnode node, const char *propname)
  137. {
  138. const char *str;
  139. int len;
  140. str = ofnode_read_prop(node, propname, &len);
  141. if (!str)
  142. return NULL;
  143. if (strnlen(str, len) >= len) {
  144. debug("<invalid>\n");
  145. return NULL;
  146. }
  147. debug("%s\n", str);
  148. return str;
  149. }
  150. int ofnode_read_size(ofnode node, const char *propname)
  151. {
  152. int len;
  153. if (!ofnode_read_prop(node, propname, &len))
  154. return -EINVAL;
  155. return len;
  156. }
  157. ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
  158. {
  159. ofnode subnode;
  160. assert(ofnode_valid(node));
  161. debug("%s: %s: ", __func__, subnode_name);
  162. if (ofnode_is_np(node)) {
  163. const struct device_node *np = ofnode_to_np(node);
  164. for (np = np->child; np; np = np->sibling) {
  165. if (!strcmp(subnode_name, np->name))
  166. break;
  167. }
  168. subnode = np_to_ofnode(np);
  169. } else {
  170. int ooffset = fdt_subnode_offset(gd->fdt_blob,
  171. ofnode_to_offset(node), subnode_name);
  172. subnode = offset_to_ofnode(ooffset);
  173. }
  174. debug("%s\n", ofnode_valid(subnode) ?
  175. ofnode_get_name(subnode) : "<none>");
  176. return subnode;
  177. }
  178. int ofnode_read_u32_array(ofnode node, const char *propname,
  179. u32 *out_values, size_t sz)
  180. {
  181. assert(ofnode_valid(node));
  182. debug("%s: %s: ", __func__, propname);
  183. if (ofnode_is_np(node)) {
  184. return of_read_u32_array(ofnode_to_np(node), propname,
  185. out_values, sz);
  186. } else {
  187. return fdtdec_get_int_array(gd->fdt_blob,
  188. ofnode_to_offset(node), propname,
  189. out_values, sz);
  190. }
  191. }
  192. #if !CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
  193. bool ofnode_is_enabled(ofnode node)
  194. {
  195. if (ofnode_is_np(node)) {
  196. return of_device_is_available(ofnode_to_np(node));
  197. } else {
  198. return fdtdec_get_is_enabled(gd->fdt_blob,
  199. ofnode_to_offset(node));
  200. }
  201. }
  202. ofnode ofnode_first_subnode(ofnode node)
  203. {
  204. assert(ofnode_valid(node));
  205. if (ofnode_is_np(node))
  206. return np_to_ofnode(node.np->child);
  207. return offset_to_ofnode(
  208. fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
  209. }
  210. ofnode ofnode_next_subnode(ofnode node)
  211. {
  212. assert(ofnode_valid(node));
  213. if (ofnode_is_np(node))
  214. return np_to_ofnode(node.np->sibling);
  215. return offset_to_ofnode(
  216. fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
  217. }
  218. #endif /* !DM_INLINE_OFNODE */
  219. ofnode ofnode_get_parent(ofnode node)
  220. {
  221. ofnode parent;
  222. assert(ofnode_valid(node));
  223. if (ofnode_is_np(node))
  224. parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
  225. else
  226. parent.of_offset = fdt_parent_offset(gd->fdt_blob,
  227. ofnode_to_offset(node));
  228. return parent;
  229. }
  230. const char *ofnode_get_name(ofnode node)
  231. {
  232. if (!ofnode_valid(node)) {
  233. debug("%s node not valid\n", __func__);
  234. return NULL;
  235. }
  236. if (ofnode_is_np(node))
  237. return strrchr(node.np->full_name, '/') + 1;
  238. return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
  239. }
  240. int ofnode_get_path(ofnode node, char *buf, int buflen)
  241. {
  242. assert(ofnode_valid(node));
  243. if (ofnode_is_np(node)) {
  244. if (strlen(node.np->full_name) >= buflen)
  245. return -ENOSPC;
  246. strcpy(buf, node.np->full_name);
  247. return 0;
  248. } else {
  249. int res;
  250. res = fdt_get_path(gd->fdt_blob, ofnode_to_offset(node), buf,
  251. buflen);
  252. if (!res)
  253. return res;
  254. else if (res == -FDT_ERR_NOSPACE)
  255. return -ENOSPC;
  256. else
  257. return -EINVAL;
  258. }
  259. }
  260. ofnode ofnode_get_by_phandle(uint phandle)
  261. {
  262. ofnode node;
  263. if (of_live_active())
  264. node = np_to_ofnode(of_find_node_by_phandle(phandle));
  265. else
  266. node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
  267. phandle);
  268. return node;
  269. }
  270. static fdt_addr_t __ofnode_get_addr_size_index(ofnode node, int index,
  271. fdt_size_t *size, bool translate)
  272. {
  273. int na, ns;
  274. if (size)
  275. *size = FDT_SIZE_T_NONE;
  276. if (ofnode_is_np(node)) {
  277. const __be32 *prop_val;
  278. u64 size64;
  279. uint flags;
  280. prop_val = of_get_address(ofnode_to_np(node), index, &size64,
  281. &flags);
  282. if (!prop_val)
  283. return FDT_ADDR_T_NONE;
  284. if (size)
  285. *size = size64;
  286. ns = of_n_size_cells(ofnode_to_np(node));
  287. if (translate && IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
  288. return of_translate_address(ofnode_to_np(node), prop_val);
  289. } else {
  290. na = of_n_addr_cells(ofnode_to_np(node));
  291. return of_read_number(prop_val, na);
  292. }
  293. } else {
  294. na = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
  295. ns = ofnode_read_simple_size_cells(ofnode_get_parent(node));
  296. return fdtdec_get_addr_size_fixed(gd->fdt_blob,
  297. ofnode_to_offset(node), "reg",
  298. index, na, ns, size,
  299. translate);
  300. }
  301. }
  302. fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index, fdt_size_t *size)
  303. {
  304. return __ofnode_get_addr_size_index(node, index, size, true);
  305. }
  306. fdt_addr_t ofnode_get_addr_size_index_notrans(ofnode node, int index,
  307. fdt_size_t *size)
  308. {
  309. return __ofnode_get_addr_size_index(node, index, size, false);
  310. }
  311. fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
  312. {
  313. fdt_size_t size;
  314. return ofnode_get_addr_size_index(node, index, &size);
  315. }
  316. fdt_addr_t ofnode_get_addr(ofnode node)
  317. {
  318. return ofnode_get_addr_index(node, 0);
  319. }
  320. fdt_size_t ofnode_get_size(ofnode node)
  321. {
  322. fdt_size_t size;
  323. ofnode_get_addr_size_index(node, 0, &size);
  324. return size;
  325. }
  326. int ofnode_stringlist_search(ofnode node, const char *property,
  327. const char *string)
  328. {
  329. if (ofnode_is_np(node)) {
  330. return of_property_match_string(ofnode_to_np(node),
  331. property, string);
  332. } else {
  333. int ret;
  334. ret = fdt_stringlist_search(gd->fdt_blob,
  335. ofnode_to_offset(node), property,
  336. string);
  337. if (ret == -FDT_ERR_NOTFOUND)
  338. return -ENODATA;
  339. else if (ret < 0)
  340. return -EINVAL;
  341. return ret;
  342. }
  343. }
  344. int ofnode_read_string_index(ofnode node, const char *property, int index,
  345. const char **outp)
  346. {
  347. if (ofnode_is_np(node)) {
  348. return of_property_read_string_index(ofnode_to_np(node),
  349. property, index, outp);
  350. } else {
  351. int len;
  352. *outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
  353. property, index, &len);
  354. if (len < 0)
  355. return -EINVAL;
  356. return 0;
  357. }
  358. }
  359. int ofnode_read_string_count(ofnode node, const char *property)
  360. {
  361. if (ofnode_is_np(node)) {
  362. return of_property_count_strings(ofnode_to_np(node), property);
  363. } else {
  364. return fdt_stringlist_count(gd->fdt_blob,
  365. ofnode_to_offset(node), property);
  366. }
  367. }
  368. static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
  369. struct ofnode_phandle_args *out)
  370. {
  371. assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
  372. out->node = offset_to_ofnode(in->node);
  373. out->args_count = in->args_count;
  374. memcpy(out->args, in->args, sizeof(out->args));
  375. }
  376. static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
  377. struct ofnode_phandle_args *out)
  378. {
  379. assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
  380. out->node = np_to_ofnode(in->np);
  381. out->args_count = in->args_count;
  382. memcpy(out->args, in->args, sizeof(out->args));
  383. }
  384. int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
  385. const char *cells_name, int cell_count,
  386. int index,
  387. struct ofnode_phandle_args *out_args)
  388. {
  389. if (ofnode_is_np(node)) {
  390. struct of_phandle_args args;
  391. int ret;
  392. ret = of_parse_phandle_with_args(ofnode_to_np(node),
  393. list_name, cells_name,
  394. cell_count, index,
  395. &args);
  396. if (ret)
  397. return ret;
  398. ofnode_from_of_phandle_args(&args, out_args);
  399. } else {
  400. struct fdtdec_phandle_args args;
  401. int ret;
  402. ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
  403. ofnode_to_offset(node),
  404. list_name, cells_name,
  405. cell_count, index, &args);
  406. if (ret)
  407. return ret;
  408. ofnode_from_fdtdec_phandle_args(&args, out_args);
  409. }
  410. return 0;
  411. }
  412. int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
  413. const char *cells_name, int cell_count)
  414. {
  415. if (ofnode_is_np(node))
  416. return of_count_phandle_with_args(ofnode_to_np(node),
  417. list_name, cells_name, cell_count);
  418. else
  419. return fdtdec_parse_phandle_with_args(gd->fdt_blob,
  420. ofnode_to_offset(node), list_name, cells_name,
  421. cell_count, -1, NULL);
  422. }
  423. ofnode ofnode_path(const char *path)
  424. {
  425. if (of_live_active())
  426. return np_to_ofnode(of_find_node_by_path(path));
  427. else
  428. return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
  429. }
  430. const void *ofnode_read_chosen_prop(const char *propname, int *sizep)
  431. {
  432. ofnode chosen_node;
  433. chosen_node = ofnode_path("/chosen");
  434. return ofnode_read_prop(chosen_node, propname, sizep);
  435. }
  436. const char *ofnode_read_chosen_string(const char *propname)
  437. {
  438. return ofnode_read_chosen_prop(propname, NULL);
  439. }
  440. ofnode ofnode_get_chosen_node(const char *name)
  441. {
  442. const char *prop;
  443. prop = ofnode_read_chosen_prop(name, NULL);
  444. if (!prop)
  445. return ofnode_null();
  446. return ofnode_path(prop);
  447. }
  448. const void *ofnode_read_aliases_prop(const char *propname, int *sizep)
  449. {
  450. ofnode node;
  451. node = ofnode_path("/aliases");
  452. return ofnode_read_prop(node, propname, sizep);
  453. }
  454. ofnode ofnode_get_aliases_node(const char *name)
  455. {
  456. const char *prop;
  457. prop = ofnode_read_aliases_prop(name, NULL);
  458. if (!prop)
  459. return ofnode_null();
  460. debug("%s: node_path: %s\n", __func__, prop);
  461. return ofnode_path(prop);
  462. }
  463. int ofnode_get_child_count(ofnode parent)
  464. {
  465. ofnode child;
  466. int num = 0;
  467. ofnode_for_each_subnode(child, parent)
  468. num++;
  469. return num;
  470. }
  471. static int decode_timing_property(ofnode node, const char *name,
  472. struct timing_entry *result)
  473. {
  474. int length, ret = 0;
  475. length = ofnode_read_size(node, name);
  476. if (length < 0) {
  477. debug("%s: could not find property %s\n",
  478. ofnode_get_name(node), name);
  479. return length;
  480. }
  481. if (length == sizeof(u32)) {
  482. result->typ = ofnode_read_u32_default(node, name, 0);
  483. result->min = result->typ;
  484. result->max = result->typ;
  485. } else {
  486. ret = ofnode_read_u32_array(node, name, &result->min, 3);
  487. }
  488. return ret;
  489. }
  490. int ofnode_decode_display_timing(ofnode parent, int index,
  491. struct display_timing *dt)
  492. {
  493. int i;
  494. ofnode timings, node;
  495. u32 val = 0;
  496. int ret = 0;
  497. timings = ofnode_find_subnode(parent, "display-timings");
  498. if (!ofnode_valid(timings))
  499. return -EINVAL;
  500. i = 0;
  501. ofnode_for_each_subnode(node, timings) {
  502. if (i++ == index)
  503. break;
  504. }
  505. if (!ofnode_valid(node))
  506. return -EINVAL;
  507. memset(dt, 0, sizeof(*dt));
  508. ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
  509. ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
  510. ret |= decode_timing_property(node, "hactive", &dt->hactive);
  511. ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
  512. ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
  513. ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
  514. ret |= decode_timing_property(node, "vactive", &dt->vactive);
  515. ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
  516. ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
  517. dt->flags = 0;
  518. val = ofnode_read_u32_default(node, "vsync-active", -1);
  519. if (val != -1) {
  520. dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
  521. DISPLAY_FLAGS_VSYNC_LOW;
  522. }
  523. val = ofnode_read_u32_default(node, "hsync-active", -1);
  524. if (val != -1) {
  525. dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
  526. DISPLAY_FLAGS_HSYNC_LOW;
  527. }
  528. val = ofnode_read_u32_default(node, "de-active", -1);
  529. if (val != -1) {
  530. dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
  531. DISPLAY_FLAGS_DE_LOW;
  532. }
  533. val = ofnode_read_u32_default(node, "pixelclk-active", -1);
  534. if (val != -1) {
  535. dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
  536. DISPLAY_FLAGS_PIXDATA_NEGEDGE;
  537. }
  538. if (ofnode_read_bool(node, "interlaced"))
  539. dt->flags |= DISPLAY_FLAGS_INTERLACED;
  540. if (ofnode_read_bool(node, "doublescan"))
  541. dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
  542. if (ofnode_read_bool(node, "doubleclk"))
  543. dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
  544. return ret;
  545. }
  546. const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
  547. {
  548. if (ofnode_is_np(node))
  549. return of_get_property(ofnode_to_np(node), propname, lenp);
  550. else
  551. return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
  552. propname, lenp);
  553. }
  554. int ofnode_get_first_property(ofnode node, struct ofprop *prop)
  555. {
  556. prop->node = node;
  557. if (ofnode_is_np(node)) {
  558. prop->prop = of_get_first_property(ofnode_to_np(prop->node));
  559. if (!prop->prop)
  560. return -FDT_ERR_NOTFOUND;
  561. } else {
  562. prop->offset =
  563. fdt_first_property_offset(gd->fdt_blob,
  564. ofnode_to_offset(prop->node));
  565. if (prop->offset < 0)
  566. return prop->offset;
  567. }
  568. return 0;
  569. }
  570. int ofnode_get_next_property(struct ofprop *prop)
  571. {
  572. if (ofnode_is_np(prop->node)) {
  573. prop->prop = of_get_next_property(ofnode_to_np(prop->node),
  574. prop->prop);
  575. if (!prop->prop)
  576. return -FDT_ERR_NOTFOUND;
  577. } else {
  578. prop->offset = fdt_next_property_offset(gd->fdt_blob,
  579. prop->offset);
  580. if (prop->offset < 0)
  581. return prop->offset;
  582. }
  583. return 0;
  584. }
  585. const void *ofnode_get_property_by_prop(const struct ofprop *prop,
  586. const char **propname, int *lenp)
  587. {
  588. if (ofnode_is_np(prop->node))
  589. return of_get_property_by_prop(ofnode_to_np(prop->node),
  590. prop->prop, propname, lenp);
  591. else
  592. return fdt_getprop_by_offset(gd->fdt_blob,
  593. prop->offset,
  594. propname, lenp);
  595. }
  596. bool ofnode_is_available(ofnode node)
  597. {
  598. if (ofnode_is_np(node))
  599. return of_device_is_available(ofnode_to_np(node));
  600. else
  601. return fdtdec_get_is_enabled(gd->fdt_blob,
  602. ofnode_to_offset(node));
  603. }
  604. fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
  605. fdt_size_t *sizep)
  606. {
  607. if (ofnode_is_np(node)) {
  608. int na, ns;
  609. int psize;
  610. const struct device_node *np = ofnode_to_np(node);
  611. const __be32 *prop = of_get_property(np, property, &psize);
  612. if (!prop)
  613. return FDT_ADDR_T_NONE;
  614. na = of_n_addr_cells(np);
  615. ns = of_n_size_cells(np);
  616. *sizep = of_read_number(prop + na, ns);
  617. if (CONFIG_IS_ENABLED(OF_TRANSLATE) && ns > 0)
  618. return of_translate_address(np, prop);
  619. else
  620. return of_read_number(prop, na);
  621. } else {
  622. return fdtdec_get_addr_size(gd->fdt_blob,
  623. ofnode_to_offset(node), property,
  624. sizep);
  625. }
  626. }
  627. const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
  628. size_t sz)
  629. {
  630. if (ofnode_is_np(node)) {
  631. const struct device_node *np = ofnode_to_np(node);
  632. int psize;
  633. const __be32 *prop = of_get_property(np, propname, &psize);
  634. if (!prop || sz != psize)
  635. return NULL;
  636. return (uint8_t *)prop;
  637. } else {
  638. return fdtdec_locate_byte_array(gd->fdt_blob,
  639. ofnode_to_offset(node), propname, sz);
  640. }
  641. }
  642. int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
  643. const char *propname, struct fdt_pci_addr *addr)
  644. {
  645. const fdt32_t *cell;
  646. int len;
  647. int ret = -ENOENT;
  648. debug("%s: %s: ", __func__, propname);
  649. /*
  650. * If we follow the pci bus bindings strictly, we should check
  651. * the value of the node's parent node's #address-cells and
  652. * #size-cells. They need to be 3 and 2 accordingly. However,
  653. * for simplicity we skip the check here.
  654. */
  655. cell = ofnode_get_property(node, propname, &len);
  656. if (!cell)
  657. goto fail;
  658. if ((len % FDT_PCI_REG_SIZE) == 0) {
  659. int num = len / FDT_PCI_REG_SIZE;
  660. int i;
  661. for (i = 0; i < num; i++) {
  662. debug("pci address #%d: %08lx %08lx %08lx\n", i,
  663. (ulong)fdt32_to_cpu(cell[0]),
  664. (ulong)fdt32_to_cpu(cell[1]),
  665. (ulong)fdt32_to_cpu(cell[2]));
  666. if ((fdt32_to_cpu(*cell) & type) == type) {
  667. addr->phys_hi = fdt32_to_cpu(cell[0]);
  668. addr->phys_mid = fdt32_to_cpu(cell[1]);
  669. addr->phys_lo = fdt32_to_cpu(cell[2]);
  670. break;
  671. }
  672. cell += (FDT_PCI_ADDR_CELLS +
  673. FDT_PCI_SIZE_CELLS);
  674. }
  675. if (i == num) {
  676. ret = -ENXIO;
  677. goto fail;
  678. }
  679. return 0;
  680. }
  681. ret = -EINVAL;
  682. fail:
  683. debug("(not found)\n");
  684. return ret;
  685. }
  686. int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
  687. {
  688. const char *list, *end;
  689. int len;
  690. list = ofnode_get_property(node, "compatible", &len);
  691. if (!list)
  692. return -ENOENT;
  693. end = list + len;
  694. while (list < end) {
  695. len = strlen(list);
  696. if (len >= strlen("pciVVVV,DDDD")) {
  697. char *s = strstr(list, "pci");
  698. /*
  699. * check if the string is something like pciVVVV,DDDD.RR
  700. * or just pciVVVV,DDDD
  701. */
  702. if (s && s[7] == ',' &&
  703. (s[12] == '.' || s[12] == 0)) {
  704. s += 3;
  705. *vendor = simple_strtol(s, NULL, 16);
  706. s += 5;
  707. *device = simple_strtol(s, NULL, 16);
  708. return 0;
  709. }
  710. }
  711. list += (len + 1);
  712. }
  713. return -ENOENT;
  714. }
  715. int ofnode_read_addr_cells(ofnode node)
  716. {
  717. if (ofnode_is_np(node)) {
  718. return of_n_addr_cells(ofnode_to_np(node));
  719. } else {
  720. int parent = fdt_parent_offset(gd->fdt_blob,
  721. ofnode_to_offset(node));
  722. return fdt_address_cells(gd->fdt_blob, parent);
  723. }
  724. }
  725. int ofnode_read_size_cells(ofnode node)
  726. {
  727. if (ofnode_is_np(node)) {
  728. return of_n_size_cells(ofnode_to_np(node));
  729. } else {
  730. int parent = fdt_parent_offset(gd->fdt_blob,
  731. ofnode_to_offset(node));
  732. return fdt_size_cells(gd->fdt_blob, parent);
  733. }
  734. }
  735. int ofnode_read_simple_addr_cells(ofnode node)
  736. {
  737. if (ofnode_is_np(node))
  738. return of_simple_addr_cells(ofnode_to_np(node));
  739. else
  740. return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
  741. }
  742. int ofnode_read_simple_size_cells(ofnode node)
  743. {
  744. if (ofnode_is_np(node))
  745. return of_simple_size_cells(ofnode_to_np(node));
  746. else
  747. return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
  748. }
  749. bool ofnode_pre_reloc(ofnode node)
  750. {
  751. #if defined(CONFIG_SPL_BUILD) || defined(CONFIG_TPL_BUILD)
  752. /* for SPL and TPL the remaining nodes after the fdtgrep 1st pass
  753. * had property dm-pre-reloc or u-boot,dm-spl/tpl.
  754. * They are removed in final dtb (fdtgrep 2nd pass)
  755. */
  756. return true;
  757. #else
  758. if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
  759. return true;
  760. if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
  761. return true;
  762. /*
  763. * In regular builds individual spl and tpl handling both
  764. * count as handled pre-relocation for later second init.
  765. */
  766. if (ofnode_read_bool(node, "u-boot,dm-spl") ||
  767. ofnode_read_bool(node, "u-boot,dm-tpl"))
  768. return true;
  769. return false;
  770. #endif
  771. }
  772. int ofnode_read_resource(ofnode node, uint index, struct resource *res)
  773. {
  774. if (ofnode_is_np(node)) {
  775. return of_address_to_resource(ofnode_to_np(node), index, res);
  776. } else {
  777. struct fdt_resource fres;
  778. int ret;
  779. ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
  780. "reg", index, &fres);
  781. if (ret < 0)
  782. return -EINVAL;
  783. memset(res, '\0', sizeof(*res));
  784. res->start = fres.start;
  785. res->end = fres.end;
  786. return 0;
  787. }
  788. }
  789. int ofnode_read_resource_byname(ofnode node, const char *name,
  790. struct resource *res)
  791. {
  792. int index;
  793. index = ofnode_stringlist_search(node, "reg-names", name);
  794. if (index < 0)
  795. return index;
  796. return ofnode_read_resource(node, index, res);
  797. }
  798. u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
  799. {
  800. if (ofnode_is_np(node))
  801. return of_translate_address(ofnode_to_np(node), in_addr);
  802. else
  803. return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
  804. }
  805. u64 ofnode_translate_dma_address(ofnode node, const fdt32_t *in_addr)
  806. {
  807. if (ofnode_is_np(node))
  808. return of_translate_dma_address(ofnode_to_np(node), in_addr);
  809. else
  810. return fdt_translate_dma_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
  811. }
  812. int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu, dma_addr_t *bus, u64 *size)
  813. {
  814. if (ofnode_is_np(node))
  815. return of_get_dma_range(ofnode_to_np(node), cpu, bus, size);
  816. else
  817. return fdt_get_dma_range(gd->fdt_blob, ofnode_to_offset(node),
  818. cpu, bus, size);
  819. }
  820. int ofnode_device_is_compatible(ofnode node, const char *compat)
  821. {
  822. if (ofnode_is_np(node))
  823. return of_device_is_compatible(ofnode_to_np(node), compat,
  824. NULL, NULL);
  825. else
  826. return !fdt_node_check_compatible(gd->fdt_blob,
  827. ofnode_to_offset(node),
  828. compat);
  829. }
  830. ofnode ofnode_by_compatible(ofnode from, const char *compat)
  831. {
  832. if (of_live_active()) {
  833. return np_to_ofnode(of_find_compatible_node(
  834. (struct device_node *)ofnode_to_np(from), NULL,
  835. compat));
  836. } else {
  837. return offset_to_ofnode(fdt_node_offset_by_compatible(
  838. gd->fdt_blob, ofnode_to_offset(from), compat));
  839. }
  840. }
  841. ofnode ofnode_by_prop_value(ofnode from, const char *propname,
  842. const void *propval, int proplen)
  843. {
  844. if (of_live_active()) {
  845. return np_to_ofnode(of_find_node_by_prop_value(
  846. (struct device_node *)ofnode_to_np(from), propname,
  847. propval, proplen));
  848. } else {
  849. return offset_to_ofnode(fdt_node_offset_by_prop_value(
  850. gd->fdt_blob, ofnode_to_offset(from),
  851. propname, propval, proplen));
  852. }
  853. }
  854. int ofnode_write_prop(ofnode node, const char *propname, int len,
  855. const void *value)
  856. {
  857. const struct device_node *np = ofnode_to_np(node);
  858. struct property *pp;
  859. struct property *pp_last = NULL;
  860. struct property *new;
  861. if (!of_live_active())
  862. return -ENOSYS;
  863. if (!np)
  864. return -EINVAL;
  865. for (pp = np->properties; pp; pp = pp->next) {
  866. if (strcmp(pp->name, propname) == 0) {
  867. /* Property exists -> change value */
  868. pp->value = (void *)value;
  869. pp->length = len;
  870. return 0;
  871. }
  872. pp_last = pp;
  873. }
  874. if (!pp_last)
  875. return -ENOENT;
  876. /* Property does not exist -> append new property */
  877. new = malloc(sizeof(struct property));
  878. if (!new)
  879. return -ENOMEM;
  880. new->name = strdup(propname);
  881. if (!new->name) {
  882. free(new);
  883. return -ENOMEM;
  884. }
  885. new->value = (void *)value;
  886. new->length = len;
  887. new->next = NULL;
  888. pp_last->next = new;
  889. return 0;
  890. }
  891. int ofnode_write_string(ofnode node, const char *propname, const char *value)
  892. {
  893. if (!of_live_active())
  894. return -ENOSYS;
  895. assert(ofnode_valid(node));
  896. debug("%s: %s = %s", __func__, propname, value);
  897. return ofnode_write_prop(node, propname, strlen(value) + 1, value);
  898. }
  899. int ofnode_set_enabled(ofnode node, bool value)
  900. {
  901. if (!of_live_active())
  902. return -ENOSYS;
  903. assert(ofnode_valid(node));
  904. if (value)
  905. return ofnode_write_string(node, "status", "okay");
  906. else
  907. return ofnode_write_string(node, "status", "disabled");
  908. }