fdt_support.h 12 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. #ifndef __FDT_SUPPORT_H
  7. #define __FDT_SUPPORT_H
  8. #ifdef CONFIG_OF_LIBFDT
  9. #include <asm/u-boot.h>
  10. #include <linux/libfdt.h>
  11. /**
  12. * arch_fixup_fdt() - Write arch-specific information to fdt
  13. *
  14. * Defined in arch/$(ARCH)/lib/bootm-fdt.c
  15. *
  16. * @blob: FDT blob to write to
  17. * @return 0 if ok, or -ve FDT_ERR_... on failure
  18. */
  19. int arch_fixup_fdt(void *blob);
  20. void ft_cpu_setup(void *blob, struct bd_info *bd);
  21. void ft_pci_setup(void *blob, struct bd_info *bd);
  22. u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
  23. const char *prop, const u32 dflt);
  24. u32 fdt_getprop_u32_default(const void *fdt, const char *path,
  25. const char *prop, const u32 dflt);
  26. /**
  27. * Add data to the root of the FDT before booting the OS.
  28. *
  29. * See doc/device-tree-bindings/root.txt
  30. *
  31. * @param fdt FDT address in memory
  32. * @return 0 if ok, or -FDT_ERR_... on error
  33. */
  34. int fdt_root(void *fdt);
  35. /**
  36. * Add chosen data the FDT before booting the OS.
  37. *
  38. * In particular, this adds the kernel command line (bootargs) to the FDT.
  39. *
  40. * @param fdt FDT address in memory
  41. * @return 0 if ok, or -FDT_ERR_... on error
  42. */
  43. int fdt_chosen(void *fdt);
  44. /**
  45. * Add initrd information to the FDT before booting the OS.
  46. *
  47. * @param fdt FDT address in memory
  48. * @return 0 if ok, or -FDT_ERR_... on error
  49. */
  50. int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
  51. void do_fixup_by_path(void *fdt, const char *path, const char *prop,
  52. const void *val, int len, int create);
  53. void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
  54. u32 val, int create);
  55. static inline void do_fixup_by_path_string(void *fdt, const char *path,
  56. const char *prop, const char *status)
  57. {
  58. do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
  59. }
  60. void do_fixup_by_prop(void *fdt,
  61. const char *pname, const void *pval, int plen,
  62. const char *prop, const void *val, int len,
  63. int create);
  64. void do_fixup_by_prop_u32(void *fdt,
  65. const char *pname, const void *pval, int plen,
  66. const char *prop, u32 val, int create);
  67. void do_fixup_by_compat(void *fdt, const char *compat,
  68. const char *prop, const void *val, int len, int create);
  69. void do_fixup_by_compat_u32(void *fdt, const char *compat,
  70. const char *prop, u32 val, int create);
  71. /**
  72. * Setup the memory node in the DT. Creates one if none was existing before.
  73. * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
  74. * whole memory.
  75. *
  76. * @param blob FDT blob to update
  77. * @param start Begin of DRAM mapping in physical memory
  78. * @param size Size of the single memory bank
  79. * @return 0 if ok, or -1 or -FDT_ERR_... on error
  80. */
  81. int fdt_fixup_memory(void *blob, u64 start, u64 size);
  82. /**
  83. * Fill the DT memory node with multiple memory banks.
  84. * Creates the node if none was existing before.
  85. * If banks is 0, it will not touch the existing reg property. This allows
  86. * boards to not mess with the existing DT setup, which may have been
  87. * filled in properly before.
  88. *
  89. * @param blob FDT blob to update
  90. * @param start Array of size <banks> to hold the start addresses.
  91. * @param size Array of size <banks> to hold the size of each region.
  92. * @param banks Number of memory banks to create. If 0, the reg
  93. * property will be left untouched.
  94. * @return 0 if ok, or -1 or -FDT_ERR_... on error
  95. */
  96. #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
  97. int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
  98. int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int banks);
  99. #else
  100. static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
  101. int banks)
  102. {
  103. return 0;
  104. }
  105. #endif
  106. void fdt_fixup_ethernet(void *fdt);
  107. int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
  108. const void *val, int len, int create);
  109. void fdt_fixup_qe_firmware(void *fdt);
  110. /**
  111. * Update native-mode property of display-timings node to the phandle
  112. * of the timings matching a display by name (case insensitive).
  113. *
  114. * see kernel Documentation/devicetree/bindings/video/display-timing.txt
  115. *
  116. * @param blob FDT blob to update
  117. * @param path path within dt
  118. * @param display name of display timing to match
  119. * @return 0 if ok, or -FDT_ERR_... on error
  120. */
  121. int fdt_fixup_display(void *blob, const char *path, const char *display);
  122. #if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL)
  123. void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd);
  124. #else
  125. static inline void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd) {}
  126. #endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */
  127. #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
  128. void fdt_fixup_crypto_node(void *blob, int sec_rev);
  129. #else
  130. static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
  131. #endif
  132. /**
  133. * Record information about a processed loadable in /fit-images (creating
  134. * /fit-images if necessary).
  135. *
  136. * @param blob FDT blob to update
  137. * @param index index of this loadable
  138. * @param name name of the loadable
  139. * @param load_addr address the loadable was loaded to
  140. * @param size number of bytes loaded
  141. * @param entry_point entry point (if specified, otherwise pass -1)
  142. * @param type type (if specified, otherwise pass NULL)
  143. * @param os os-type (if specified, otherwise pass NULL)
  144. * @return 0 if ok, or -1 or -FDT_ERR_... on error
  145. */
  146. int fdt_record_loadable(void *blob, u32 index, const char *name,
  147. uintptr_t load_addr, u32 size, uintptr_t entry_point,
  148. const char *type, const char *os);
  149. #ifdef CONFIG_PCI
  150. #include <pci.h>
  151. int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
  152. #endif
  153. int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
  154. /**
  155. * Add board-specific data to the FDT before booting the OS.
  156. *
  157. * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
  158. * This function is called if CONFIG_OF_BOARD_SETUP is defined
  159. *
  160. * @param blob FDT blob to update
  161. * @param bd Pointer to board data
  162. * @return 0 if ok, or -FDT_ERR_... on error
  163. */
  164. int ft_board_setup(void *blob, struct bd_info *bd);
  165. /*
  166. * The keystone2 SOC requires all 32 bit aliased addresses to be converted
  167. * to their 36 physical format. This has to happen after all fdt nodes
  168. * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
  169. * called at the end of the image_setup_libfdt() is to do that convertion.
  170. */
  171. void ft_board_setup_ex(void *blob, struct bd_info *bd);
  172. void ft_cpu_setup(void *blob, struct bd_info *bd);
  173. void ft_pci_setup(void *blob, struct bd_info *bd);
  174. /**
  175. * Add system-specific data to the FDT before booting the OS.
  176. *
  177. * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
  178. * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
  179. *
  180. * @param blob FDT blob to update
  181. * @param bd Pointer to board data
  182. * @return 0 if ok, or -FDT_ERR_... on error
  183. */
  184. int ft_system_setup(void *blob, struct bd_info *bd);
  185. void set_working_fdt_addr(ulong addr);
  186. /**
  187. * shrink down the given blob to minimum size + some extrasize if required
  188. *
  189. * @param blob FDT blob to update
  190. * @param extrasize additional bytes needed
  191. * @return 0 if ok, or -FDT_ERR_... on error
  192. */
  193. int fdt_shrink_to_minimum(void *blob, uint extrasize);
  194. int fdt_increase_size(void *fdt, int add_len);
  195. int fdt_fixup_nor_flash_size(void *blob);
  196. struct node_info;
  197. #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
  198. void fdt_fixup_mtdparts(void *fdt, const struct node_info *node_info,
  199. int node_info_size);
  200. #else
  201. static inline void fdt_fixup_mtdparts(void *fdt,
  202. const struct node_info *node_info,
  203. int node_info_size)
  204. {
  205. }
  206. #endif
  207. void fdt_del_node_and_alias(void *blob, const char *alias);
  208. /**
  209. * Translate an address from the DT into a CPU physical address
  210. *
  211. * The translation relies on the "ranges" property.
  212. *
  213. * @param blob Pointer to device tree blob
  214. * @param node_offset Node DT offset
  215. * @param in_addr Pointer to the address to translate
  216. * @return translated address or OF_BAD_ADDR on error
  217. */
  218. u64 fdt_translate_address(const void *blob, int node_offset,
  219. const __be32 *in_addr);
  220. /**
  221. * Translate a DMA address from the DT into a CPU physical address
  222. *
  223. * The translation relies on the "dma-ranges" property.
  224. *
  225. * @param blob Pointer to device tree blob
  226. * @param node_offset Node DT offset
  227. * @param in_addr Pointer to the DMA address to translate
  228. * @return translated DMA address or OF_BAD_ADDR on error
  229. */
  230. u64 fdt_translate_dma_address(const void *blob, int node_offset,
  231. const __be32 *in_addr);
  232. int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
  233. phys_addr_t compat_off);
  234. int fdt_alloc_phandle(void *blob);
  235. int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
  236. unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
  237. int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
  238. int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
  239. u64 addr);
  240. u64 fdt_get_base_address(const void *fdt, int node);
  241. int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
  242. uint64_t *addr, uint64_t *len);
  243. enum fdt_status {
  244. FDT_STATUS_OKAY,
  245. FDT_STATUS_DISABLED,
  246. FDT_STATUS_FAIL,
  247. FDT_STATUS_FAIL_ERROR_CODE,
  248. };
  249. int fdt_set_node_status(void *fdt, int nodeoffset,
  250. enum fdt_status status, unsigned int error_code);
  251. static inline int fdt_status_okay(void *fdt, int nodeoffset)
  252. {
  253. return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY, 0);
  254. }
  255. static inline int fdt_status_disabled(void *fdt, int nodeoffset)
  256. {
  257. return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED, 0);
  258. }
  259. static inline int fdt_status_fail(void *fdt, int nodeoffset)
  260. {
  261. return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL, 0);
  262. }
  263. int fdt_set_status_by_alias(void *fdt, const char *alias,
  264. enum fdt_status status, unsigned int error_code);
  265. static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
  266. {
  267. return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY, 0);
  268. }
  269. static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
  270. {
  271. return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED, 0);
  272. }
  273. static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
  274. {
  275. return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL, 0);
  276. }
  277. /* Helper to read a big number; size is in cells (not bytes) */
  278. static inline u64 fdt_read_number(const fdt32_t *cell, int size)
  279. {
  280. u64 r = 0;
  281. while (size--)
  282. r = (r << 32) | fdt32_to_cpu(*(cell++));
  283. return r;
  284. }
  285. void fdt_support_default_count_cells(const void *blob, int parentoffset,
  286. int *addrc, int *sizec);
  287. int ft_verify_fdt(void *fdt);
  288. int arch_fixup_memory_node(void *blob);
  289. int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
  290. u32 height, u32 stride, const char *format);
  291. int fdt_overlay_apply_verbose(void *fdt, void *fdto);
  292. /**
  293. * fdt_get_cells_len() - Get the length of a type of cell in top-level nodes
  294. *
  295. * Returns the length of the cell type in bytes (4 or 8).
  296. *
  297. * @blob: Pointer to device tree blob
  298. * @nr_cells_name: Name to lookup, e.g. "#address-cells"
  299. */
  300. int fdt_get_cells_len(const void *blob, char *nr_cells_name);
  301. #endif /* ifdef CONFIG_OF_LIBFDT */
  302. #ifdef USE_HOSTCC
  303. int fdtdec_get_int(const void *blob, int node, const char *prop_name,
  304. int default_val);
  305. /*
  306. * Count child nodes of one parent node.
  307. *
  308. * @param blob FDT blob
  309. * @param node parent node
  310. * @return number of child node; 0 if there is not child node
  311. */
  312. int fdtdec_get_child_count(const void *blob, int node);
  313. #endif
  314. #ifdef CONFIG_FMAN_ENET
  315. int fdt_update_ethernet_dt(void *blob);
  316. #endif
  317. #ifdef CONFIG_FSL_MC_ENET
  318. void fdt_fixup_board_enet(void *blob);
  319. #endif
  320. #ifdef CONFIG_CMD_PSTORE
  321. void fdt_fixup_pstore(void *blob);
  322. #endif
  323. #endif /* ifndef __FDT_SUPPORT_H */