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