fdt_support.c 48 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2007
  4. * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
  5. *
  6. * Copyright 2010-2011 Freescale Semiconductor, Inc.
  7. */
  8. #include <common.h>
  9. #include <env.h>
  10. #include <log.h>
  11. #include <mapmem.h>
  12. #include <net.h>
  13. #include <stdio_dev.h>
  14. #include <linux/ctype.h>
  15. #include <linux/types.h>
  16. #include <asm/global_data.h>
  17. #include <linux/libfdt.h>
  18. #include <fdt_support.h>
  19. #include <exports.h>
  20. #include <fdtdec.h>
  21. /**
  22. * fdt_getprop_u32_default_node - Return a node's property or a default
  23. *
  24. * @fdt: ptr to device tree
  25. * @off: offset of node
  26. * @cell: cell offset in property
  27. * @prop: property name
  28. * @dflt: default value if the property isn't found
  29. *
  30. * Convenience function to return a node's property or a default value if
  31. * the property doesn't exist.
  32. */
  33. u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
  34. const char *prop, const u32 dflt)
  35. {
  36. const fdt32_t *val;
  37. int len;
  38. val = fdt_getprop(fdt, off, prop, &len);
  39. /* Check if property exists */
  40. if (!val)
  41. return dflt;
  42. /* Check if property is long enough */
  43. if (len < ((cell + 1) * sizeof(uint32_t)))
  44. return dflt;
  45. return fdt32_to_cpu(*val);
  46. }
  47. /**
  48. * fdt_getprop_u32_default - Find a node and return it's property or a default
  49. *
  50. * @fdt: ptr to device tree
  51. * @path: path of node
  52. * @prop: property name
  53. * @dflt: default value if the property isn't found
  54. *
  55. * Convenience function to find a node and return it's property or a
  56. * default value if it doesn't exist.
  57. */
  58. u32 fdt_getprop_u32_default(const void *fdt, const char *path,
  59. const char *prop, const u32 dflt)
  60. {
  61. int off;
  62. off = fdt_path_offset(fdt, path);
  63. if (off < 0)
  64. return dflt;
  65. return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
  66. }
  67. /**
  68. * fdt_find_and_setprop: Find a node and set it's property
  69. *
  70. * @fdt: ptr to device tree
  71. * @node: path of node
  72. * @prop: property name
  73. * @val: ptr to new value
  74. * @len: length of new property value
  75. * @create: flag to create the property if it doesn't exist
  76. *
  77. * Convenience function to directly set a property given the path to the node.
  78. */
  79. int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
  80. const void *val, int len, int create)
  81. {
  82. int nodeoff = fdt_path_offset(fdt, node);
  83. if (nodeoff < 0)
  84. return nodeoff;
  85. if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
  86. return 0; /* create flag not set; so exit quietly */
  87. return fdt_setprop(fdt, nodeoff, prop, val, len);
  88. }
  89. /**
  90. * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
  91. *
  92. * @fdt: pointer to the device tree blob
  93. * @parentoffset: structure block offset of a node
  94. * @name: name of the subnode to locate
  95. *
  96. * fdt_subnode_offset() finds a subnode of the node with a given name.
  97. * If the subnode does not exist, it will be created.
  98. */
  99. int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
  100. {
  101. int offset;
  102. offset = fdt_subnode_offset(fdt, parentoffset, name);
  103. if (offset == -FDT_ERR_NOTFOUND)
  104. offset = fdt_add_subnode(fdt, parentoffset, name);
  105. if (offset < 0)
  106. printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
  107. return offset;
  108. }
  109. #if defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
  110. static int fdt_fixup_stdout(void *fdt, int chosenoff)
  111. {
  112. int err;
  113. int aliasoff;
  114. char sername[9] = { 0 };
  115. const void *path;
  116. int len;
  117. char tmp[256]; /* long enough */
  118. sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
  119. aliasoff = fdt_path_offset(fdt, "/aliases");
  120. if (aliasoff < 0) {
  121. err = aliasoff;
  122. goto noalias;
  123. }
  124. path = fdt_getprop(fdt, aliasoff, sername, &len);
  125. if (!path) {
  126. err = len;
  127. goto noalias;
  128. }
  129. /* fdt_setprop may break "path" so we copy it to tmp buffer */
  130. memcpy(tmp, path, len);
  131. err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
  132. if (err < 0)
  133. printf("WARNING: could not set linux,stdout-path %s.\n",
  134. fdt_strerror(err));
  135. return err;
  136. noalias:
  137. printf("WARNING: %s: could not read %s alias: %s\n",
  138. __func__, sername, fdt_strerror(err));
  139. return 0;
  140. }
  141. #else
  142. static int fdt_fixup_stdout(void *fdt, int chosenoff)
  143. {
  144. return 0;
  145. }
  146. #endif
  147. static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
  148. uint64_t val, int is_u64)
  149. {
  150. if (is_u64)
  151. return fdt_setprop_u64(fdt, nodeoffset, name, val);
  152. else
  153. return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
  154. }
  155. int fdt_root(void *fdt)
  156. {
  157. char *serial;
  158. int err;
  159. err = fdt_check_header(fdt);
  160. if (err < 0) {
  161. printf("fdt_root: %s\n", fdt_strerror(err));
  162. return err;
  163. }
  164. serial = env_get("serial#");
  165. if (serial) {
  166. err = fdt_setprop(fdt, 0, "serial-number", serial,
  167. strlen(serial) + 1);
  168. if (err < 0) {
  169. printf("WARNING: could not set serial-number %s.\n",
  170. fdt_strerror(err));
  171. return err;
  172. }
  173. }
  174. return 0;
  175. }
  176. int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
  177. {
  178. int nodeoffset;
  179. int err, j, total;
  180. int is_u64;
  181. uint64_t addr, size;
  182. /* just return if the size of initrd is zero */
  183. if (initrd_start == initrd_end)
  184. return 0;
  185. /* find or create "/chosen" node. */
  186. nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
  187. if (nodeoffset < 0)
  188. return nodeoffset;
  189. total = fdt_num_mem_rsv(fdt);
  190. /*
  191. * Look for an existing entry and update it. If we don't find
  192. * the entry, we will j be the next available slot.
  193. */
  194. for (j = 0; j < total; j++) {
  195. err = fdt_get_mem_rsv(fdt, j, &addr, &size);
  196. if (addr == initrd_start) {
  197. fdt_del_mem_rsv(fdt, j);
  198. break;
  199. }
  200. }
  201. err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
  202. if (err < 0) {
  203. printf("fdt_initrd: %s\n", fdt_strerror(err));
  204. return err;
  205. }
  206. is_u64 = (fdt_address_cells(fdt, 0) == 2);
  207. err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
  208. (uint64_t)initrd_start, is_u64);
  209. if (err < 0) {
  210. printf("WARNING: could not set linux,initrd-start %s.\n",
  211. fdt_strerror(err));
  212. return err;
  213. }
  214. err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
  215. (uint64_t)initrd_end, is_u64);
  216. if (err < 0) {
  217. printf("WARNING: could not set linux,initrd-end %s.\n",
  218. fdt_strerror(err));
  219. return err;
  220. }
  221. return 0;
  222. }
  223. /**
  224. * board_fdt_chosen_bootargs - boards may override this function to use
  225. * alternative kernel command line arguments
  226. */
  227. __weak char *board_fdt_chosen_bootargs(void)
  228. {
  229. return env_get("bootargs");
  230. }
  231. int fdt_chosen(void *fdt)
  232. {
  233. int nodeoffset;
  234. int err;
  235. char *str; /* used to set string properties */
  236. err = fdt_check_header(fdt);
  237. if (err < 0) {
  238. printf("fdt_chosen: %s\n", fdt_strerror(err));
  239. return err;
  240. }
  241. /* find or create "/chosen" node. */
  242. nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
  243. if (nodeoffset < 0)
  244. return nodeoffset;
  245. str = board_fdt_chosen_bootargs();
  246. if (str) {
  247. err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
  248. strlen(str) + 1);
  249. if (err < 0) {
  250. printf("WARNING: could not set bootargs %s.\n",
  251. fdt_strerror(err));
  252. return err;
  253. }
  254. }
  255. return fdt_fixup_stdout(fdt, nodeoffset);
  256. }
  257. void do_fixup_by_path(void *fdt, const char *path, const char *prop,
  258. const void *val, int len, int create)
  259. {
  260. #if defined(DEBUG)
  261. int i;
  262. debug("Updating property '%s/%s' = ", path, prop);
  263. for (i = 0; i < len; i++)
  264. debug(" %.2x", *(u8*)(val+i));
  265. debug("\n");
  266. #endif
  267. int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
  268. if (rc)
  269. printf("Unable to update property %s:%s, err=%s\n",
  270. path, prop, fdt_strerror(rc));
  271. }
  272. void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
  273. u32 val, int create)
  274. {
  275. fdt32_t tmp = cpu_to_fdt32(val);
  276. do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
  277. }
  278. void do_fixup_by_prop(void *fdt,
  279. const char *pname, const void *pval, int plen,
  280. const char *prop, const void *val, int len,
  281. int create)
  282. {
  283. int off;
  284. #if defined(DEBUG)
  285. int i;
  286. debug("Updating property '%s' = ", prop);
  287. for (i = 0; i < len; i++)
  288. debug(" %.2x", *(u8*)(val+i));
  289. debug("\n");
  290. #endif
  291. off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
  292. while (off != -FDT_ERR_NOTFOUND) {
  293. if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
  294. fdt_setprop(fdt, off, prop, val, len);
  295. off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
  296. }
  297. }
  298. void do_fixup_by_prop_u32(void *fdt,
  299. const char *pname, const void *pval, int plen,
  300. const char *prop, u32 val, int create)
  301. {
  302. fdt32_t tmp = cpu_to_fdt32(val);
  303. do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
  304. }
  305. void do_fixup_by_compat(void *fdt, const char *compat,
  306. const char *prop, const void *val, int len, int create)
  307. {
  308. int off = -1;
  309. #if defined(DEBUG)
  310. int i;
  311. debug("Updating property '%s' = ", prop);
  312. for (i = 0; i < len; i++)
  313. debug(" %.2x", *(u8*)(val+i));
  314. debug("\n");
  315. #endif
  316. off = fdt_node_offset_by_compatible(fdt, -1, compat);
  317. while (off != -FDT_ERR_NOTFOUND) {
  318. if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
  319. fdt_setprop(fdt, off, prop, val, len);
  320. off = fdt_node_offset_by_compatible(fdt, off, compat);
  321. }
  322. }
  323. void do_fixup_by_compat_u32(void *fdt, const char *compat,
  324. const char *prop, u32 val, int create)
  325. {
  326. fdt32_t tmp = cpu_to_fdt32(val);
  327. do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
  328. }
  329. #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
  330. /*
  331. * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
  332. */
  333. static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
  334. int n)
  335. {
  336. int i;
  337. int address_cells = fdt_address_cells(fdt, 0);
  338. int size_cells = fdt_size_cells(fdt, 0);
  339. char *p = buf;
  340. for (i = 0; i < n; i++) {
  341. if (address_cells == 2)
  342. *(fdt64_t *)p = cpu_to_fdt64(address[i]);
  343. else
  344. *(fdt32_t *)p = cpu_to_fdt32(address[i]);
  345. p += 4 * address_cells;
  346. if (size_cells == 2)
  347. *(fdt64_t *)p = cpu_to_fdt64(size[i]);
  348. else
  349. *(fdt32_t *)p = cpu_to_fdt32(size[i]);
  350. p += 4 * size_cells;
  351. }
  352. return p - (char *)buf;
  353. }
  354. #if CONFIG_NR_DRAM_BANKS > 4
  355. #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
  356. #else
  357. #define MEMORY_BANKS_MAX 4
  358. #endif
  359. /**
  360. * fdt_fixup_memory_banks - Update DT memory node
  361. * @blob: Pointer to DT blob
  362. * @start: Pointer to memory start addresses array
  363. * @size: Pointer to memory sizes array
  364. * @banks: Number of memory banks
  365. *
  366. * Return: 0 on success, negative value on failure
  367. *
  368. * Based on the passed number of banks and arrays, the function is able to
  369. * update existing DT memory nodes to match run time detected/changed memory
  370. * configuration. Implementation is handling one specific case with only one
  371. * memory node where multiple tuples could be added/updated.
  372. * The case where multiple memory nodes with a single tuple (base, size) are
  373. * used, this function is only updating the first memory node without removing
  374. * others.
  375. */
  376. int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
  377. {
  378. int err, nodeoffset;
  379. int len, i;
  380. u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
  381. if (banks > MEMORY_BANKS_MAX) {
  382. printf("%s: num banks %d exceeds hardcoded limit %d."
  383. " Recompile with higher MEMORY_BANKS_MAX?\n",
  384. __FUNCTION__, banks, MEMORY_BANKS_MAX);
  385. return -1;
  386. }
  387. err = fdt_check_header(blob);
  388. if (err < 0) {
  389. printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
  390. return err;
  391. }
  392. /* find or create "/memory" node. */
  393. nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
  394. if (nodeoffset < 0)
  395. return nodeoffset;
  396. err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
  397. sizeof("memory"));
  398. if (err < 0) {
  399. printf("WARNING: could not set %s %s.\n", "device_type",
  400. fdt_strerror(err));
  401. return err;
  402. }
  403. for (i = 0; i < banks; i++) {
  404. if (start[i] == 0 && size[i] == 0)
  405. break;
  406. }
  407. banks = i;
  408. if (!banks)
  409. return 0;
  410. len = fdt_pack_reg(blob, tmp, start, size, banks);
  411. err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
  412. if (err < 0) {
  413. printf("WARNING: could not set %s %s.\n",
  414. "reg", fdt_strerror(err));
  415. return err;
  416. }
  417. return 0;
  418. }
  419. int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int areas)
  420. {
  421. int err, nodeoffset;
  422. int len;
  423. u8 tmp[8 * 16]; /* Up to 64-bit address + 64-bit size */
  424. if (areas > 8) {
  425. printf("%s: num areas %d exceeds hardcoded limit %d\n",
  426. __func__, areas, 8);
  427. return -1;
  428. }
  429. err = fdt_check_header(blob);
  430. if (err < 0) {
  431. printf("%s: %s\n", __func__, fdt_strerror(err));
  432. return err;
  433. }
  434. /* find or create "/memory" node. */
  435. nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
  436. if (nodeoffset < 0)
  437. return nodeoffset;
  438. len = fdt_pack_reg(blob, tmp, start, size, areas);
  439. err = fdt_setprop(blob, nodeoffset, "linux,usable-memory", tmp, len);
  440. if (err < 0) {
  441. printf("WARNING: could not set %s %s.\n",
  442. "reg", fdt_strerror(err));
  443. return err;
  444. }
  445. return 0;
  446. }
  447. #endif
  448. int fdt_fixup_memory(void *blob, u64 start, u64 size)
  449. {
  450. return fdt_fixup_memory_banks(blob, &start, &size, 1);
  451. }
  452. void fdt_fixup_ethernet(void *fdt)
  453. {
  454. int i = 0, j, prop;
  455. char *tmp, *end;
  456. char mac[16];
  457. const char *path;
  458. unsigned char mac_addr[ARP_HLEN];
  459. int offset;
  460. #ifdef FDT_SEQ_MACADDR_FROM_ENV
  461. int nodeoff;
  462. const struct fdt_property *fdt_prop;
  463. #endif
  464. if (fdt_path_offset(fdt, "/aliases") < 0)
  465. return;
  466. /* Cycle through all aliases */
  467. for (prop = 0; ; prop++) {
  468. const char *name;
  469. /* FDT might have been edited, recompute the offset */
  470. offset = fdt_first_property_offset(fdt,
  471. fdt_path_offset(fdt, "/aliases"));
  472. /* Select property number 'prop' */
  473. for (j = 0; j < prop; j++)
  474. offset = fdt_next_property_offset(fdt, offset);
  475. if (offset < 0)
  476. break;
  477. path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
  478. if (!strncmp(name, "ethernet", 8)) {
  479. /* Treat plain "ethernet" same as "ethernet0". */
  480. if (!strcmp(name, "ethernet")
  481. #ifdef FDT_SEQ_MACADDR_FROM_ENV
  482. || !strcmp(name, "ethernet0")
  483. #endif
  484. )
  485. i = 0;
  486. #ifndef FDT_SEQ_MACADDR_FROM_ENV
  487. else
  488. i = trailing_strtol(name);
  489. #endif
  490. if (i != -1) {
  491. if (i == 0)
  492. strcpy(mac, "ethaddr");
  493. else
  494. sprintf(mac, "eth%daddr", i);
  495. } else {
  496. continue;
  497. }
  498. #ifdef FDT_SEQ_MACADDR_FROM_ENV
  499. nodeoff = fdt_path_offset(fdt, path);
  500. fdt_prop = fdt_get_property(fdt, nodeoff, "status",
  501. NULL);
  502. if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
  503. continue;
  504. i++;
  505. #endif
  506. tmp = env_get(mac);
  507. if (!tmp)
  508. continue;
  509. for (j = 0; j < 6; j++) {
  510. mac_addr[j] = tmp ?
  511. hextoul(tmp, &end) : 0;
  512. if (tmp)
  513. tmp = (*end) ? end + 1 : end;
  514. }
  515. do_fixup_by_path(fdt, path, "mac-address",
  516. &mac_addr, 6, 0);
  517. do_fixup_by_path(fdt, path, "local-mac-address",
  518. &mac_addr, 6, 1);
  519. }
  520. }
  521. }
  522. int fdt_record_loadable(void *blob, u32 index, const char *name,
  523. uintptr_t load_addr, u32 size, uintptr_t entry_point,
  524. const char *type, const char *os, const char *arch)
  525. {
  526. int err, node;
  527. err = fdt_check_header(blob);
  528. if (err < 0) {
  529. printf("%s: %s\n", __func__, fdt_strerror(err));
  530. return err;
  531. }
  532. /* find or create "/fit-images" node */
  533. node = fdt_find_or_add_subnode(blob, 0, "fit-images");
  534. if (node < 0)
  535. return node;
  536. /* find or create "/fit-images/<name>" node */
  537. node = fdt_find_or_add_subnode(blob, node, name);
  538. if (node < 0)
  539. return node;
  540. fdt_setprop_u64(blob, node, "load", load_addr);
  541. if (entry_point != -1)
  542. fdt_setprop_u64(blob, node, "entry", entry_point);
  543. fdt_setprop_u32(blob, node, "size", size);
  544. if (type)
  545. fdt_setprop_string(blob, node, "type", type);
  546. if (os)
  547. fdt_setprop_string(blob, node, "os", os);
  548. if (arch)
  549. fdt_setprop_string(blob, node, "arch", arch);
  550. return node;
  551. }
  552. /* Resize the fdt to its actual size + a bit of padding */
  553. int fdt_shrink_to_minimum(void *blob, uint extrasize)
  554. {
  555. int i;
  556. uint64_t addr, size;
  557. int total, ret;
  558. uint actualsize;
  559. int fdt_memrsv = 0;
  560. if (!blob)
  561. return 0;
  562. total = fdt_num_mem_rsv(blob);
  563. for (i = 0; i < total; i++) {
  564. fdt_get_mem_rsv(blob, i, &addr, &size);
  565. if (addr == (uintptr_t)blob) {
  566. fdt_del_mem_rsv(blob, i);
  567. fdt_memrsv = 1;
  568. break;
  569. }
  570. }
  571. /*
  572. * Calculate the actual size of the fdt
  573. * plus the size needed for 5 fdt_add_mem_rsv, one
  574. * for the fdt itself and 4 for a possible initrd
  575. * ((initrd-start + initrd-end) * 2 (name & value))
  576. */
  577. actualsize = fdt_off_dt_strings(blob) +
  578. fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
  579. actualsize += extrasize;
  580. /* Make it so the fdt ends on a page boundary */
  581. actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
  582. actualsize = actualsize - ((uintptr_t)blob & 0xfff);
  583. /* Change the fdt header to reflect the correct size */
  584. fdt_set_totalsize(blob, actualsize);
  585. if (fdt_memrsv) {
  586. /* Add the new reservation */
  587. ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
  588. if (ret < 0)
  589. return ret;
  590. }
  591. return actualsize;
  592. }
  593. #ifdef CONFIG_PCI
  594. #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
  595. #define FDT_PCI_PREFETCH (0x40000000)
  596. #define FDT_PCI_MEM32 (0x02000000)
  597. #define FDT_PCI_IO (0x01000000)
  598. #define FDT_PCI_MEM64 (0x03000000)
  599. int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
  600. int addrcell, sizecell, len, r;
  601. u32 *dma_range;
  602. /* sized based on pci addr cells, size-cells, & address-cells */
  603. u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
  604. addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
  605. sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
  606. dma_range = &dma_ranges[0];
  607. for (r = 0; r < hose->region_count; r++) {
  608. u64 bus_start, phys_start, size;
  609. /* skip if !PCI_REGION_SYS_MEMORY */
  610. if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
  611. continue;
  612. bus_start = (u64)hose->regions[r].bus_start;
  613. phys_start = (u64)hose->regions[r].phys_start;
  614. size = (u64)hose->regions[r].size;
  615. dma_range[0] = 0;
  616. if (size >= 0x100000000ull)
  617. dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM64);
  618. else
  619. dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM32);
  620. if (hose->regions[r].flags & PCI_REGION_PREFETCH)
  621. dma_range[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH);
  622. #ifdef CONFIG_SYS_PCI_64BIT
  623. dma_range[1] = cpu_to_fdt32(bus_start >> 32);
  624. #else
  625. dma_range[1] = 0;
  626. #endif
  627. dma_range[2] = cpu_to_fdt32(bus_start & 0xffffffff);
  628. if (addrcell == 2) {
  629. dma_range[3] = cpu_to_fdt32(phys_start >> 32);
  630. dma_range[4] = cpu_to_fdt32(phys_start & 0xffffffff);
  631. } else {
  632. dma_range[3] = cpu_to_fdt32(phys_start & 0xffffffff);
  633. }
  634. if (sizecell == 2) {
  635. dma_range[3 + addrcell + 0] =
  636. cpu_to_fdt32(size >> 32);
  637. dma_range[3 + addrcell + 1] =
  638. cpu_to_fdt32(size & 0xffffffff);
  639. } else {
  640. dma_range[3 + addrcell + 0] =
  641. cpu_to_fdt32(size & 0xffffffff);
  642. }
  643. dma_range += (3 + addrcell + sizecell);
  644. }
  645. len = dma_range - &dma_ranges[0];
  646. if (len)
  647. fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
  648. return 0;
  649. }
  650. #endif
  651. int fdt_increase_size(void *fdt, int add_len)
  652. {
  653. int newlen;
  654. newlen = fdt_totalsize(fdt) + add_len;
  655. /* Open in place with a new len */
  656. return fdt_open_into(fdt, fdt, newlen);
  657. }
  658. #ifdef CONFIG_FDT_FIXUP_PARTITIONS
  659. #include <jffs2/load_kernel.h>
  660. #include <mtd_node.h>
  661. static int fdt_del_subnodes(const void *blob, int parent_offset)
  662. {
  663. int off, ndepth;
  664. int ret;
  665. for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
  666. (off >= 0) && (ndepth > 0);
  667. off = fdt_next_node(blob, off, &ndepth)) {
  668. if (ndepth == 1) {
  669. debug("delete %s: offset: %x\n",
  670. fdt_get_name(blob, off, 0), off);
  671. ret = fdt_del_node((void *)blob, off);
  672. if (ret < 0) {
  673. printf("Can't delete node: %s\n",
  674. fdt_strerror(ret));
  675. return ret;
  676. } else {
  677. ndepth = 0;
  678. off = parent_offset;
  679. }
  680. }
  681. }
  682. return 0;
  683. }
  684. static int fdt_del_partitions(void *blob, int parent_offset)
  685. {
  686. const void *prop;
  687. int ndepth = 0;
  688. int off;
  689. int ret;
  690. off = fdt_next_node(blob, parent_offset, &ndepth);
  691. if (off > 0 && ndepth == 1) {
  692. prop = fdt_getprop(blob, off, "label", NULL);
  693. if (prop == NULL) {
  694. /*
  695. * Could not find label property, nand {}; node?
  696. * Check subnode, delete partitions there if any.
  697. */
  698. return fdt_del_partitions(blob, off);
  699. } else {
  700. ret = fdt_del_subnodes(blob, parent_offset);
  701. if (ret < 0) {
  702. printf("Can't remove subnodes: %s\n",
  703. fdt_strerror(ret));
  704. return ret;
  705. }
  706. }
  707. }
  708. return 0;
  709. }
  710. static int fdt_node_set_part_info(void *blob, int parent_offset,
  711. struct mtd_device *dev)
  712. {
  713. struct list_head *pentry;
  714. struct part_info *part;
  715. int off, ndepth = 0;
  716. int part_num, ret;
  717. int sizecell;
  718. char buf[64];
  719. ret = fdt_del_partitions(blob, parent_offset);
  720. if (ret < 0)
  721. return ret;
  722. /*
  723. * Check if size/address is 1 or 2 cells.
  724. * We assume #address-cells and #size-cells have same value.
  725. */
  726. sizecell = fdt_getprop_u32_default_node(blob, parent_offset,
  727. 0, "#size-cells", 1);
  728. /*
  729. * Check if it is nand {}; subnode, adjust
  730. * the offset in this case
  731. */
  732. off = fdt_next_node(blob, parent_offset, &ndepth);
  733. if (off > 0 && ndepth == 1)
  734. parent_offset = off;
  735. part_num = 0;
  736. list_for_each_prev(pentry, &dev->parts) {
  737. int newoff;
  738. part = list_entry(pentry, struct part_info, link);
  739. debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
  740. part_num, part->name, part->size,
  741. part->offset, part->mask_flags);
  742. sprintf(buf, "partition@%llx", part->offset);
  743. add_sub:
  744. ret = fdt_add_subnode(blob, parent_offset, buf);
  745. if (ret == -FDT_ERR_NOSPACE) {
  746. ret = fdt_increase_size(blob, 512);
  747. if (!ret)
  748. goto add_sub;
  749. else
  750. goto err_size;
  751. } else if (ret < 0) {
  752. printf("Can't add partition node: %s\n",
  753. fdt_strerror(ret));
  754. return ret;
  755. }
  756. newoff = ret;
  757. /* Check MTD_WRITEABLE_CMD flag */
  758. if (part->mask_flags & 1) {
  759. add_ro:
  760. ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
  761. if (ret == -FDT_ERR_NOSPACE) {
  762. ret = fdt_increase_size(blob, 512);
  763. if (!ret)
  764. goto add_ro;
  765. else
  766. goto err_size;
  767. } else if (ret < 0)
  768. goto err_prop;
  769. }
  770. add_reg:
  771. if (sizecell == 2) {
  772. ret = fdt_setprop_u64(blob, newoff,
  773. "reg", part->offset);
  774. if (!ret)
  775. ret = fdt_appendprop_u64(blob, newoff,
  776. "reg", part->size);
  777. } else {
  778. ret = fdt_setprop_u32(blob, newoff,
  779. "reg", part->offset);
  780. if (!ret)
  781. ret = fdt_appendprop_u32(blob, newoff,
  782. "reg", part->size);
  783. }
  784. if (ret == -FDT_ERR_NOSPACE) {
  785. ret = fdt_increase_size(blob, 512);
  786. if (!ret)
  787. goto add_reg;
  788. else
  789. goto err_size;
  790. } else if (ret < 0)
  791. goto err_prop;
  792. add_label:
  793. ret = fdt_setprop_string(blob, newoff, "label", part->name);
  794. if (ret == -FDT_ERR_NOSPACE) {
  795. ret = fdt_increase_size(blob, 512);
  796. if (!ret)
  797. goto add_label;
  798. else
  799. goto err_size;
  800. } else if (ret < 0)
  801. goto err_prop;
  802. part_num++;
  803. }
  804. return 0;
  805. err_size:
  806. printf("Can't increase blob size: %s\n", fdt_strerror(ret));
  807. return ret;
  808. err_prop:
  809. printf("Can't add property: %s\n", fdt_strerror(ret));
  810. return ret;
  811. }
  812. /*
  813. * Update partitions in nor/nand nodes using info from
  814. * mtdparts environment variable. The nodes to update are
  815. * specified by node_info structure which contains mtd device
  816. * type and compatible string: E. g. the board code in
  817. * ft_board_setup() could use:
  818. *
  819. * struct node_info nodes[] = {
  820. * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
  821. * { "cfi-flash", MTD_DEV_TYPE_NOR, },
  822. * };
  823. *
  824. * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
  825. */
  826. void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
  827. int node_info_size)
  828. {
  829. struct mtd_device *dev;
  830. int i, idx;
  831. int noff;
  832. bool inited = false;
  833. for (i = 0; i < node_info_size; i++) {
  834. idx = 0;
  835. noff = -1;
  836. while ((noff = fdt_node_offset_by_compatible(blob, noff,
  837. node_info[i].compat)) >= 0) {
  838. const char *prop;
  839. prop = fdt_getprop(blob, noff, "status", NULL);
  840. if (prop && !strcmp(prop, "disabled"))
  841. continue;
  842. debug("%s: %s, mtd dev type %d\n",
  843. fdt_get_name(blob, noff, 0),
  844. node_info[i].compat, node_info[i].type);
  845. if (!inited) {
  846. if (mtdparts_init() != 0)
  847. return;
  848. inited = true;
  849. }
  850. dev = device_find(node_info[i].type, idx++);
  851. if (dev) {
  852. if (fdt_node_set_part_info(blob, noff, dev))
  853. return; /* return on error */
  854. }
  855. }
  856. }
  857. }
  858. #endif
  859. void fdt_del_node_and_alias(void *blob, const char *alias)
  860. {
  861. int off = fdt_path_offset(blob, alias);
  862. if (off < 0)
  863. return;
  864. fdt_del_node(blob, off);
  865. off = fdt_path_offset(blob, "/aliases");
  866. fdt_delprop(blob, off, alias);
  867. }
  868. /* Max address size we deal with */
  869. #define OF_MAX_ADDR_CELLS 4
  870. #define OF_BAD_ADDR FDT_ADDR_T_NONE
  871. #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
  872. (ns) > 0)
  873. /* Debug utility */
  874. #ifdef DEBUG
  875. static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
  876. {
  877. printf("%s", s);
  878. while(na--)
  879. printf(" %08x", *(addr++));
  880. printf("\n");
  881. }
  882. #else
  883. static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
  884. #endif
  885. /**
  886. * struct of_bus - Callbacks for bus specific translators
  887. * @name: A string used to identify this bus in debug output.
  888. * @addresses: The name of the DT property from which addresses are
  889. * to be read, typically "reg".
  890. * @match: Return non-zero if the node whose parent is at
  891. * parentoffset in the FDT blob corresponds to a bus
  892. * of this type, otherwise return zero. If NULL a match
  893. * is assumed.
  894. * @count_cells:Count how many cells (be32 values) a node whose parent
  895. * is at parentoffset in the FDT blob will require to
  896. * represent its address (written to *addrc) & size
  897. * (written to *sizec).
  898. * @map: Map the address addr from the address space of this
  899. * bus to that of its parent, making use of the ranges
  900. * read from DT to an array at range. na and ns are the
  901. * number of cells (be32 values) used to hold and address
  902. * or size, respectively, for this bus. pna is the number
  903. * of cells used to hold an address for the parent bus.
  904. * Returns the address in the address space of the parent
  905. * bus.
  906. * @translate: Update the value of the address cells at addr within an
  907. * FDT by adding offset to it. na specifies the number of
  908. * cells used to hold the address being translated. Returns
  909. * zero on success, non-zero on error.
  910. *
  911. * Each bus type will include a struct of_bus in the of_busses array,
  912. * providing implementations of some or all of the functions used to
  913. * match the bus & handle address translation for its children.
  914. */
  915. struct of_bus {
  916. const char *name;
  917. const char *addresses;
  918. int (*match)(const void *blob, int parentoffset);
  919. void (*count_cells)(const void *blob, int parentoffset,
  920. int *addrc, int *sizec);
  921. u64 (*map)(fdt32_t *addr, const fdt32_t *range,
  922. int na, int ns, int pna);
  923. int (*translate)(fdt32_t *addr, u64 offset, int na);
  924. };
  925. /* Default translator (generic bus) */
  926. void fdt_support_default_count_cells(const void *blob, int parentoffset,
  927. int *addrc, int *sizec)
  928. {
  929. const fdt32_t *prop;
  930. if (addrc)
  931. *addrc = fdt_address_cells(blob, parentoffset);
  932. if (sizec) {
  933. prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
  934. if (prop)
  935. *sizec = be32_to_cpup(prop);
  936. else
  937. *sizec = 1;
  938. }
  939. }
  940. static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
  941. int na, int ns, int pna)
  942. {
  943. u64 cp, s, da;
  944. cp = fdt_read_number(range, na);
  945. s = fdt_read_number(range + na + pna, ns);
  946. da = fdt_read_number(addr, na);
  947. debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
  948. if (da < cp || da >= (cp + s))
  949. return OF_BAD_ADDR;
  950. return da - cp;
  951. }
  952. static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
  953. {
  954. u64 a = fdt_read_number(addr, na);
  955. memset(addr, 0, na * 4);
  956. a += offset;
  957. if (na > 1)
  958. addr[na - 2] = cpu_to_fdt32(a >> 32);
  959. addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
  960. return 0;
  961. }
  962. #ifdef CONFIG_OF_ISA_BUS
  963. /* ISA bus translator */
  964. static int of_bus_isa_match(const void *blob, int parentoffset)
  965. {
  966. const char *name;
  967. name = fdt_get_name(blob, parentoffset, NULL);
  968. if (!name)
  969. return 0;
  970. return !strcmp(name, "isa");
  971. }
  972. static void of_bus_isa_count_cells(const void *blob, int parentoffset,
  973. int *addrc, int *sizec)
  974. {
  975. if (addrc)
  976. *addrc = 2;
  977. if (sizec)
  978. *sizec = 1;
  979. }
  980. static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
  981. int na, int ns, int pna)
  982. {
  983. u64 cp, s, da;
  984. /* Check address type match */
  985. if ((addr[0] ^ range[0]) & cpu_to_be32(1))
  986. return OF_BAD_ADDR;
  987. cp = fdt_read_number(range + 1, na - 1);
  988. s = fdt_read_number(range + na + pna, ns);
  989. da = fdt_read_number(addr + 1, na - 1);
  990. debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
  991. if (da < cp || da >= (cp + s))
  992. return OF_BAD_ADDR;
  993. return da - cp;
  994. }
  995. static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
  996. {
  997. return of_bus_default_translate(addr + 1, offset, na - 1);
  998. }
  999. #endif /* CONFIG_OF_ISA_BUS */
  1000. /* Array of bus specific translators */
  1001. static struct of_bus of_busses[] = {
  1002. #ifdef CONFIG_OF_ISA_BUS
  1003. /* ISA */
  1004. {
  1005. .name = "isa",
  1006. .addresses = "reg",
  1007. .match = of_bus_isa_match,
  1008. .count_cells = of_bus_isa_count_cells,
  1009. .map = of_bus_isa_map,
  1010. .translate = of_bus_isa_translate,
  1011. },
  1012. #endif /* CONFIG_OF_ISA_BUS */
  1013. /* Default */
  1014. {
  1015. .name = "default",
  1016. .addresses = "reg",
  1017. .count_cells = fdt_support_default_count_cells,
  1018. .map = of_bus_default_map,
  1019. .translate = of_bus_default_translate,
  1020. },
  1021. };
  1022. static struct of_bus *of_match_bus(const void *blob, int parentoffset)
  1023. {
  1024. struct of_bus *bus;
  1025. if (ARRAY_SIZE(of_busses) == 1)
  1026. return of_busses;
  1027. for (bus = of_busses; bus; bus++) {
  1028. if (!bus->match || bus->match(blob, parentoffset))
  1029. return bus;
  1030. }
  1031. /*
  1032. * We should always have matched the default bus at least, since
  1033. * it has a NULL match field. If we didn't then it somehow isn't
  1034. * in the of_busses array or something equally catastrophic has
  1035. * gone wrong.
  1036. */
  1037. assert(0);
  1038. return NULL;
  1039. }
  1040. static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
  1041. struct of_bus *pbus, fdt32_t *addr,
  1042. int na, int ns, int pna, const char *rprop)
  1043. {
  1044. const fdt32_t *ranges;
  1045. int rlen;
  1046. int rone;
  1047. u64 offset = OF_BAD_ADDR;
  1048. /* Normally, an absence of a "ranges" property means we are
  1049. * crossing a non-translatable boundary, and thus the addresses
  1050. * below the current not cannot be converted to CPU physical ones.
  1051. * Unfortunately, while this is very clear in the spec, it's not
  1052. * what Apple understood, and they do have things like /uni-n or
  1053. * /ht nodes with no "ranges" property and a lot of perfectly
  1054. * useable mapped devices below them. Thus we treat the absence of
  1055. * "ranges" as equivalent to an empty "ranges" property which means
  1056. * a 1:1 translation at that level. It's up to the caller not to try
  1057. * to translate addresses that aren't supposed to be translated in
  1058. * the first place. --BenH.
  1059. */
  1060. ranges = fdt_getprop(blob, parent, rprop, &rlen);
  1061. if (ranges == NULL || rlen == 0) {
  1062. offset = fdt_read_number(addr, na);
  1063. memset(addr, 0, pna * 4);
  1064. debug("OF: no ranges, 1:1 translation\n");
  1065. goto finish;
  1066. }
  1067. debug("OF: walking ranges...\n");
  1068. /* Now walk through the ranges */
  1069. rlen /= 4;
  1070. rone = na + pna + ns;
  1071. for (; rlen >= rone; rlen -= rone, ranges += rone) {
  1072. offset = bus->map(addr, ranges, na, ns, pna);
  1073. if (offset != OF_BAD_ADDR)
  1074. break;
  1075. }
  1076. if (offset == OF_BAD_ADDR) {
  1077. debug("OF: not found !\n");
  1078. return 1;
  1079. }
  1080. memcpy(addr, ranges + na, 4 * pna);
  1081. finish:
  1082. of_dump_addr("OF: parent translation for:", addr, pna);
  1083. debug("OF: with offset: %llu\n", offset);
  1084. /* Translate it into parent bus space */
  1085. return pbus->translate(addr, offset, pna);
  1086. }
  1087. /*
  1088. * Translate an address from the device-tree into a CPU physical address,
  1089. * this walks up the tree and applies the various bus mappings on the
  1090. * way.
  1091. *
  1092. * Note: We consider that crossing any level with #size-cells == 0 to mean
  1093. * that translation is impossible (that is we are not dealing with a value
  1094. * that can be mapped to a cpu physical address). This is not really specified
  1095. * that way, but this is traditionally the way IBM at least do things
  1096. */
  1097. static u64 __of_translate_address(const void *blob, int node_offset,
  1098. const fdt32_t *in_addr, const char *rprop)
  1099. {
  1100. int parent;
  1101. struct of_bus *bus, *pbus;
  1102. fdt32_t addr[OF_MAX_ADDR_CELLS];
  1103. int na, ns, pna, pns;
  1104. u64 result = OF_BAD_ADDR;
  1105. debug("OF: ** translation for device %s **\n",
  1106. fdt_get_name(blob, node_offset, NULL));
  1107. /* Get parent & match bus type */
  1108. parent = fdt_parent_offset(blob, node_offset);
  1109. if (parent < 0)
  1110. goto bail;
  1111. bus = of_match_bus(blob, parent);
  1112. /* Cound address cells & copy address locally */
  1113. bus->count_cells(blob, parent, &na, &ns);
  1114. if (!OF_CHECK_COUNTS(na, ns)) {
  1115. printf("%s: Bad cell count for %s\n", __FUNCTION__,
  1116. fdt_get_name(blob, node_offset, NULL));
  1117. goto bail;
  1118. }
  1119. memcpy(addr, in_addr, na * 4);
  1120. debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
  1121. bus->name, na, ns, fdt_get_name(blob, parent, NULL));
  1122. of_dump_addr("OF: translating address:", addr, na);
  1123. /* Translate */
  1124. for (;;) {
  1125. /* Switch to parent bus */
  1126. node_offset = parent;
  1127. parent = fdt_parent_offset(blob, node_offset);
  1128. /* If root, we have finished */
  1129. if (parent < 0) {
  1130. debug("OF: reached root node\n");
  1131. result = fdt_read_number(addr, na);
  1132. break;
  1133. }
  1134. /* Get new parent bus and counts */
  1135. pbus = of_match_bus(blob, parent);
  1136. pbus->count_cells(blob, parent, &pna, &pns);
  1137. if (!OF_CHECK_COUNTS(pna, pns)) {
  1138. printf("%s: Bad cell count for %s\n", __FUNCTION__,
  1139. fdt_get_name(blob, node_offset, NULL));
  1140. break;
  1141. }
  1142. debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
  1143. pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
  1144. /* Apply bus translation */
  1145. if (of_translate_one(blob, node_offset, bus, pbus,
  1146. addr, na, ns, pna, rprop))
  1147. break;
  1148. /* Complete the move up one level */
  1149. na = pna;
  1150. ns = pns;
  1151. bus = pbus;
  1152. of_dump_addr("OF: one level translation:", addr, na);
  1153. }
  1154. bail:
  1155. return result;
  1156. }
  1157. u64 fdt_translate_address(const void *blob, int node_offset,
  1158. const fdt32_t *in_addr)
  1159. {
  1160. return __of_translate_address(blob, node_offset, in_addr, "ranges");
  1161. }
  1162. u64 fdt_translate_dma_address(const void *blob, int node_offset,
  1163. const fdt32_t *in_addr)
  1164. {
  1165. return __of_translate_address(blob, node_offset, in_addr, "dma-ranges");
  1166. }
  1167. int fdt_get_dma_range(const void *blob, int node, phys_addr_t *cpu,
  1168. dma_addr_t *bus, u64 *size)
  1169. {
  1170. bool found_dma_ranges = false;
  1171. struct of_bus *bus_node;
  1172. const fdt32_t *ranges;
  1173. int na, ns, pna, pns;
  1174. int parent = node;
  1175. int ret = 0;
  1176. int len;
  1177. /* Find the closest dma-ranges property */
  1178. while (parent >= 0) {
  1179. ranges = fdt_getprop(blob, parent, "dma-ranges", &len);
  1180. /* Ignore empty ranges, they imply no translation required */
  1181. if (ranges && len > 0)
  1182. break;
  1183. /* Once we find 'dma-ranges', then a missing one is an error */
  1184. if (found_dma_ranges && !ranges) {
  1185. ret = -EINVAL;
  1186. goto out;
  1187. }
  1188. if (ranges)
  1189. found_dma_ranges = true;
  1190. parent = fdt_parent_offset(blob, parent);
  1191. }
  1192. if (!ranges || parent < 0) {
  1193. debug("no dma-ranges found for node %s\n",
  1194. fdt_get_name(blob, node, NULL));
  1195. ret = -ENOENT;
  1196. goto out;
  1197. }
  1198. /* switch to that node */
  1199. node = parent;
  1200. parent = fdt_parent_offset(blob, node);
  1201. if (parent < 0) {
  1202. printf("Found dma-ranges in root node, shoudln't happen\n");
  1203. ret = -EINVAL;
  1204. goto out;
  1205. }
  1206. /* Get the address sizes both for the bus and its parent */
  1207. bus_node = of_match_bus(blob, node);
  1208. bus_node->count_cells(blob, node, &na, &ns);
  1209. if (!OF_CHECK_COUNTS(na, ns)) {
  1210. printf("%s: Bad cell count for %s\n", __FUNCTION__,
  1211. fdt_get_name(blob, node, NULL));
  1212. return -EINVAL;
  1213. goto out;
  1214. }
  1215. bus_node = of_match_bus(blob, parent);
  1216. bus_node->count_cells(blob, parent, &pna, &pns);
  1217. if (!OF_CHECK_COUNTS(pna, pns)) {
  1218. printf("%s: Bad cell count for %s\n", __FUNCTION__,
  1219. fdt_get_name(blob, parent, NULL));
  1220. return -EINVAL;
  1221. goto out;
  1222. }
  1223. *bus = fdt_read_number(ranges, na);
  1224. *cpu = fdt_translate_dma_address(blob, node, ranges + na);
  1225. *size = fdt_read_number(ranges + na + pna, ns);
  1226. out:
  1227. return ret;
  1228. }
  1229. /**
  1230. * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
  1231. * who's reg property matches a physical cpu address
  1232. *
  1233. * @blob: ptr to device tree
  1234. * @compat: compatiable string to match
  1235. * @compat_off: property name
  1236. *
  1237. */
  1238. int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
  1239. phys_addr_t compat_off)
  1240. {
  1241. int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
  1242. while (off != -FDT_ERR_NOTFOUND) {
  1243. const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
  1244. if (reg) {
  1245. if (compat_off == fdt_translate_address(blob, off, reg))
  1246. return off;
  1247. }
  1248. off = fdt_node_offset_by_compatible(blob, off, compat);
  1249. }
  1250. return -FDT_ERR_NOTFOUND;
  1251. }
  1252. /**
  1253. * fdt_alloc_phandle: Return next free phandle value
  1254. *
  1255. * @blob: ptr to device tree
  1256. */
  1257. int fdt_alloc_phandle(void *blob)
  1258. {
  1259. int offset;
  1260. uint32_t phandle = 0;
  1261. for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
  1262. offset = fdt_next_node(blob, offset, NULL)) {
  1263. phandle = max(phandle, fdt_get_phandle(blob, offset));
  1264. }
  1265. return phandle + 1;
  1266. }
  1267. /*
  1268. * fdt_set_phandle: Create a phandle property for the given node
  1269. *
  1270. * @fdt: ptr to device tree
  1271. * @nodeoffset: node to update
  1272. * @phandle: phandle value to set (must be unique)
  1273. */
  1274. int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
  1275. {
  1276. int ret;
  1277. #ifdef DEBUG
  1278. int off = fdt_node_offset_by_phandle(fdt, phandle);
  1279. if ((off >= 0) && (off != nodeoffset)) {
  1280. char buf[64];
  1281. fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
  1282. printf("Trying to update node %s with phandle %u ",
  1283. buf, phandle);
  1284. fdt_get_path(fdt, off, buf, sizeof(buf));
  1285. printf("that already exists in node %s.\n", buf);
  1286. return -FDT_ERR_BADPHANDLE;
  1287. }
  1288. #endif
  1289. ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
  1290. if (ret < 0)
  1291. return ret;
  1292. /*
  1293. * For now, also set the deprecated "linux,phandle" property, so that we
  1294. * don't break older kernels.
  1295. */
  1296. ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
  1297. return ret;
  1298. }
  1299. /*
  1300. * fdt_create_phandle: Create a phandle property for the given node
  1301. *
  1302. * @fdt: ptr to device tree
  1303. * @nodeoffset: node to update
  1304. */
  1305. unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
  1306. {
  1307. /* see if there is a phandle already */
  1308. int phandle = fdt_get_phandle(fdt, nodeoffset);
  1309. /* if we got 0, means no phandle so create one */
  1310. if (phandle == 0) {
  1311. int ret;
  1312. phandle = fdt_alloc_phandle(fdt);
  1313. ret = fdt_set_phandle(fdt, nodeoffset, phandle);
  1314. if (ret < 0) {
  1315. printf("Can't set phandle %u: %s\n", phandle,
  1316. fdt_strerror(ret));
  1317. return 0;
  1318. }
  1319. }
  1320. return phandle;
  1321. }
  1322. /*
  1323. * fdt_set_node_status: Set status for the given node
  1324. *
  1325. * @fdt: ptr to device tree
  1326. * @nodeoffset: node to update
  1327. * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
  1328. * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
  1329. * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
  1330. */
  1331. int fdt_set_node_status(void *fdt, int nodeoffset,
  1332. enum fdt_status status, unsigned int error_code)
  1333. {
  1334. char buf[16];
  1335. int ret = 0;
  1336. if (nodeoffset < 0)
  1337. return nodeoffset;
  1338. switch (status) {
  1339. case FDT_STATUS_OKAY:
  1340. ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
  1341. break;
  1342. case FDT_STATUS_DISABLED:
  1343. ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
  1344. break;
  1345. case FDT_STATUS_FAIL:
  1346. ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
  1347. break;
  1348. case FDT_STATUS_FAIL_ERROR_CODE:
  1349. sprintf(buf, "fail-%d", error_code);
  1350. ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
  1351. break;
  1352. default:
  1353. printf("Invalid fdt status: %x\n", status);
  1354. ret = -1;
  1355. break;
  1356. }
  1357. return ret;
  1358. }
  1359. /*
  1360. * fdt_set_status_by_alias: Set status for the given node given an alias
  1361. *
  1362. * @fdt: ptr to device tree
  1363. * @alias: alias of node to update
  1364. * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
  1365. * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
  1366. * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
  1367. */
  1368. int fdt_set_status_by_alias(void *fdt, const char* alias,
  1369. enum fdt_status status, unsigned int error_code)
  1370. {
  1371. int offset = fdt_path_offset(fdt, alias);
  1372. return fdt_set_node_status(fdt, offset, status, error_code);
  1373. }
  1374. #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
  1375. int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
  1376. {
  1377. int noff;
  1378. int ret;
  1379. noff = fdt_node_offset_by_compatible(blob, -1, compat);
  1380. if (noff != -FDT_ERR_NOTFOUND) {
  1381. debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
  1382. add_edid:
  1383. ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
  1384. if (ret == -FDT_ERR_NOSPACE) {
  1385. ret = fdt_increase_size(blob, 512);
  1386. if (!ret)
  1387. goto add_edid;
  1388. else
  1389. goto err_size;
  1390. } else if (ret < 0) {
  1391. printf("Can't add property: %s\n", fdt_strerror(ret));
  1392. return ret;
  1393. }
  1394. }
  1395. return 0;
  1396. err_size:
  1397. printf("Can't increase blob size: %s\n", fdt_strerror(ret));
  1398. return ret;
  1399. }
  1400. #endif
  1401. /*
  1402. * Verify the physical address of device tree node for a given alias
  1403. *
  1404. * This function locates the device tree node of a given alias, and then
  1405. * verifies that the physical address of that device matches the given
  1406. * parameter. It displays a message if there is a mismatch.
  1407. *
  1408. * Returns 1 on success, 0 on failure
  1409. */
  1410. int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
  1411. {
  1412. const char *path;
  1413. const fdt32_t *reg;
  1414. int node, len;
  1415. u64 dt_addr;
  1416. path = fdt_getprop(fdt, anode, alias, NULL);
  1417. if (!path) {
  1418. /* If there's no such alias, then it's not a failure */
  1419. return 1;
  1420. }
  1421. node = fdt_path_offset(fdt, path);
  1422. if (node < 0) {
  1423. printf("Warning: device tree alias '%s' points to invalid "
  1424. "node %s.\n", alias, path);
  1425. return 0;
  1426. }
  1427. reg = fdt_getprop(fdt, node, "reg", &len);
  1428. if (!reg) {
  1429. printf("Warning: device tree node '%s' has no address.\n",
  1430. path);
  1431. return 0;
  1432. }
  1433. dt_addr = fdt_translate_address(fdt, node, reg);
  1434. if (addr != dt_addr) {
  1435. printf("Warning: U-Boot configured device %s at address %llu,\n"
  1436. "but the device tree has it address %llx.\n",
  1437. alias, addr, dt_addr);
  1438. return 0;
  1439. }
  1440. return 1;
  1441. }
  1442. /*
  1443. * Returns the base address of an SOC or PCI node
  1444. */
  1445. u64 fdt_get_base_address(const void *fdt, int node)
  1446. {
  1447. int size;
  1448. const fdt32_t *prop;
  1449. prop = fdt_getprop(fdt, node, "reg", &size);
  1450. return prop ? fdt_translate_address(fdt, node, prop) : OF_BAD_ADDR;
  1451. }
  1452. /*
  1453. * Read a property of size <prop_len>. Currently only supports 1 or 2 cells,
  1454. * or 3 cells specially for a PCI address.
  1455. */
  1456. static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
  1457. uint64_t *val, int cells)
  1458. {
  1459. const fdt32_t *prop32;
  1460. const unaligned_fdt64_t *prop64;
  1461. if ((cell_off + cells) > prop_len)
  1462. return -FDT_ERR_NOSPACE;
  1463. prop32 = &prop[cell_off];
  1464. /*
  1465. * Special handling for PCI address in PCI bus <ranges>
  1466. *
  1467. * PCI child address is made up of 3 cells. Advance the cell offset
  1468. * by 1 so that the PCI child address can be correctly read.
  1469. */
  1470. if (cells == 3)
  1471. cell_off += 1;
  1472. prop64 = (const fdt64_t *)&prop[cell_off];
  1473. switch (cells) {
  1474. case 1:
  1475. *val = fdt32_to_cpu(*prop32);
  1476. break;
  1477. case 2:
  1478. case 3:
  1479. *val = fdt64_to_cpu(*prop64);
  1480. break;
  1481. default:
  1482. return -FDT_ERR_NOSPACE;
  1483. }
  1484. return 0;
  1485. }
  1486. /**
  1487. * fdt_read_range - Read a node's n'th range property
  1488. *
  1489. * @fdt: ptr to device tree
  1490. * @node: offset of node
  1491. * @n: range index
  1492. * @child_addr: pointer to storage for the "child address" field
  1493. * @addr: pointer to storage for the CPU view translated physical start
  1494. * @len: pointer to storage for the range length
  1495. *
  1496. * Convenience function that reads and interprets a specific range out of
  1497. * a number of the "ranges" property array.
  1498. */
  1499. int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
  1500. uint64_t *addr, uint64_t *len)
  1501. {
  1502. int pnode = fdt_parent_offset(fdt, node);
  1503. const fdt32_t *ranges;
  1504. int pacells;
  1505. int acells;
  1506. int scells;
  1507. int ranges_len;
  1508. int cell = 0;
  1509. int r = 0;
  1510. /*
  1511. * The "ranges" property is an array of
  1512. * { <child address> <parent address> <size in child address space> }
  1513. *
  1514. * All 3 elements can span a diffent number of cells. Fetch their size.
  1515. */
  1516. pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
  1517. acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
  1518. scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
  1519. /* Now try to get the ranges property */
  1520. ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
  1521. if (!ranges)
  1522. return -FDT_ERR_NOTFOUND;
  1523. ranges_len /= sizeof(uint32_t);
  1524. /* Jump to the n'th entry */
  1525. cell = n * (pacells + acells + scells);
  1526. /* Read <child address> */
  1527. if (child_addr) {
  1528. r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
  1529. acells);
  1530. if (r)
  1531. return r;
  1532. }
  1533. cell += acells;
  1534. /* Read <parent address> */
  1535. if (addr)
  1536. *addr = fdt_translate_address(fdt, node, ranges + cell);
  1537. cell += pacells;
  1538. /* Read <size in child address space> */
  1539. if (len) {
  1540. r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
  1541. if (r)
  1542. return r;
  1543. }
  1544. return 0;
  1545. }
  1546. /**
  1547. * fdt_setup_simplefb_node - Fill and enable a simplefb node
  1548. *
  1549. * @fdt: ptr to device tree
  1550. * @node: offset of the simplefb node
  1551. * @base_address: framebuffer base address
  1552. * @width: width in pixels
  1553. * @height: height in pixels
  1554. * @stride: bytes per line
  1555. * @format: pixel format string
  1556. *
  1557. * Convenience function to fill and enable a simplefb node.
  1558. */
  1559. int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
  1560. u32 height, u32 stride, const char *format)
  1561. {
  1562. char name[32];
  1563. fdt32_t cells[4];
  1564. int i, addrc, sizec, ret;
  1565. fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
  1566. &addrc, &sizec);
  1567. i = 0;
  1568. if (addrc == 2)
  1569. cells[i++] = cpu_to_fdt32(base_address >> 32);
  1570. cells[i++] = cpu_to_fdt32(base_address);
  1571. if (sizec == 2)
  1572. cells[i++] = 0;
  1573. cells[i++] = cpu_to_fdt32(height * stride);
  1574. ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
  1575. if (ret < 0)
  1576. return ret;
  1577. snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
  1578. ret = fdt_set_name(fdt, node, name);
  1579. if (ret < 0)
  1580. return ret;
  1581. ret = fdt_setprop_u32(fdt, node, "width", width);
  1582. if (ret < 0)
  1583. return ret;
  1584. ret = fdt_setprop_u32(fdt, node, "height", height);
  1585. if (ret < 0)
  1586. return ret;
  1587. ret = fdt_setprop_u32(fdt, node, "stride", stride);
  1588. if (ret < 0)
  1589. return ret;
  1590. ret = fdt_setprop_string(fdt, node, "format", format);
  1591. if (ret < 0)
  1592. return ret;
  1593. ret = fdt_setprop_string(fdt, node, "status", "okay");
  1594. if (ret < 0)
  1595. return ret;
  1596. return 0;
  1597. }
  1598. /*
  1599. * Update native-mode in display-timings from display environment variable.
  1600. * The node to update are specified by path.
  1601. */
  1602. int fdt_fixup_display(void *blob, const char *path, const char *display)
  1603. {
  1604. int off, toff;
  1605. if (!display || !path)
  1606. return -FDT_ERR_NOTFOUND;
  1607. toff = fdt_path_offset(blob, path);
  1608. if (toff >= 0)
  1609. toff = fdt_subnode_offset(blob, toff, "display-timings");
  1610. if (toff < 0)
  1611. return toff;
  1612. for (off = fdt_first_subnode(blob, toff);
  1613. off >= 0;
  1614. off = fdt_next_subnode(blob, off)) {
  1615. uint32_t h = fdt_get_phandle(blob, off);
  1616. debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
  1617. fdt32_to_cpu(h));
  1618. if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
  1619. return fdt_setprop_u32(blob, toff, "native-mode", h);
  1620. }
  1621. return toff;
  1622. }
  1623. #ifdef CONFIG_OF_LIBFDT_OVERLAY
  1624. /**
  1625. * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
  1626. *
  1627. * @fdt: ptr to device tree
  1628. * @fdto: ptr to device tree overlay
  1629. *
  1630. * Convenience function to apply an overlay and display helpful messages
  1631. * in the case of an error
  1632. */
  1633. int fdt_overlay_apply_verbose(void *fdt, void *fdto)
  1634. {
  1635. int err;
  1636. bool has_symbols;
  1637. err = fdt_path_offset(fdt, "/__symbols__");
  1638. has_symbols = err >= 0;
  1639. err = fdt_overlay_apply(fdt, fdto);
  1640. if (err < 0) {
  1641. printf("failed on fdt_overlay_apply(): %s\n",
  1642. fdt_strerror(err));
  1643. if (!has_symbols) {
  1644. printf("base fdt does did not have a /__symbols__ node\n");
  1645. printf("make sure you've compiled with -@\n");
  1646. }
  1647. }
  1648. return err;
  1649. }
  1650. #endif
  1651. /**
  1652. * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
  1653. *
  1654. * @blobp: Pointer to FDT pointer
  1655. * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
  1656. */
  1657. int fdt_valid(struct fdt_header **blobp)
  1658. {
  1659. const void *blob = *blobp;
  1660. int err;
  1661. if (!blob) {
  1662. printf("The address of the fdt is invalid (NULL).\n");
  1663. return 0;
  1664. }
  1665. err = fdt_check_header(blob);
  1666. if (err == 0)
  1667. return 1; /* valid */
  1668. if (err < 0) {
  1669. printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
  1670. /*
  1671. * Be more informative on bad version.
  1672. */
  1673. if (err == -FDT_ERR_BADVERSION) {
  1674. if (fdt_version(blob) <
  1675. FDT_FIRST_SUPPORTED_VERSION) {
  1676. printf(" - too old, fdt %d < %d",
  1677. fdt_version(blob),
  1678. FDT_FIRST_SUPPORTED_VERSION);
  1679. }
  1680. if (fdt_last_comp_version(blob) >
  1681. FDT_LAST_SUPPORTED_VERSION) {
  1682. printf(" - too new, fdt %d > %d",
  1683. fdt_version(blob),
  1684. FDT_LAST_SUPPORTED_VERSION);
  1685. }
  1686. }
  1687. printf("\n");
  1688. *blobp = NULL;
  1689. return 0;
  1690. }
  1691. return 1;
  1692. }