1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
7 #ifndef __FDT_SUPPORT_H
8 #define __FDT_SUPPORT_H
10 #if (defined(CONFIG_OF_LIBFDT) || defined(CONFIG_OF_CONTROL)) && \
13 #include <asm/u-boot.h>
14 #include <linux/libfdt.h>
18 * arch_fixup_fdt() - Write arch-specific information to fdt
20 * Defined in arch/$(ARCH)/lib/bootm-fdt.c
22 * @blob: FDT blob to write to
23 * Return: 0 if ok, or -ve FDT_ERR_... on failure
25 int arch_fixup_fdt(void *blob);
27 void ft_cpu_setup(void *blob, struct bd_info *bd);
29 void ft_pci_setup(void *blob, struct bd_info *bd);
31 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
32 const char *prop, const u32 dflt);
33 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
34 const char *prop, const u32 dflt);
37 * Add data to the root of the FDT before booting the OS.
39 * See doc/device-tree-bindings/root.txt
41 * @param fdt FDT address in memory
42 * Return: 0 if ok, or -FDT_ERR_... on error
44 int fdt_root(void *fdt);
47 * Add chosen data the FDT before booting the OS.
49 * In particular, this adds the kernel command line (bootargs) to the FDT.
51 * @param fdt FDT address in memory
52 * Return: 0 if ok, or -FDT_ERR_... on error
54 int fdt_chosen(void *fdt);
57 * Add initrd information to the FDT before booting the OS.
59 * @param fdt FDT address in memory
60 * Return: 0 if ok, or -FDT_ERR_... on error
62 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
64 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
65 const void *val, int len, int create);
66 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
69 static inline void do_fixup_by_path_string(void *fdt, const char *path,
70 const char *prop, const char *status)
72 do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
75 void do_fixup_by_prop(void *fdt,
76 const char *pname, const void *pval, int plen,
77 const char *prop, const void *val, int len,
79 void do_fixup_by_prop_u32(void *fdt,
80 const char *pname, const void *pval, int plen,
81 const char *prop, u32 val, int create);
82 void do_fixup_by_compat(void *fdt, const char *compat,
83 const char *prop, const void *val, int len, int create);
84 void do_fixup_by_compat_u32(void *fdt, const char *compat,
85 const char *prop, u32 val, int create);
87 * Setup the memory node in the DT. Creates one if none was existing before.
88 * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
91 * @param blob FDT blob to update
92 * @param start Begin of DRAM mapping in physical memory
93 * @param size Size of the single memory bank
94 * Return: 0 if ok, or -1 or -FDT_ERR_... on error
96 int fdt_fixup_memory(void *blob, u64 start, u64 size);
99 * Fill the DT memory node with multiple memory banks.
100 * Creates the node if none was existing before.
101 * If banks is 0, it will not touch the existing reg property. This allows
102 * boards to not mess with the existing DT setup, which may have been
103 * filled in properly before.
105 * @param blob FDT blob to update
106 * @param start Array of size <banks> to hold the start addresses.
107 * @param size Array of size <banks> to hold the size of each region.
108 * @param banks Number of memory banks to create. If 0, the reg
109 * property will be left untouched.
110 * Return: 0 if ok, or -1 or -FDT_ERR_... on error
112 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
113 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
114 int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int banks);
116 static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
123 void fdt_fixup_ethernet(void *fdt);
124 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
125 const void *val, int len, int create);
126 void fdt_fixup_qe_firmware(void *fdt);
129 * Update native-mode property of display-timings node to the phandle
130 * of the timings matching a display by name (case insensitive).
132 * see kernel Documentation/devicetree/bindings/video/display-timing.txt
134 * @param blob FDT blob to update
135 * @param path path within dt
136 * @param display name of display timing to match
137 * Return: 0 if ok, or -FDT_ERR_... on error
139 int fdt_fixup_display(void *blob, const char *path, const char *display);
141 #if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL)
142 void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd);
144 static inline void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd) {}
145 #endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */
147 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
148 void fdt_fixup_crypto_node(void *blob, int sec_rev);
150 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
154 * Record information about a processed loadable in /fit-images (creating
155 * /fit-images if necessary).
157 * @param blob FDT blob to update
158 * @param index index of this loadable
159 * @param name name of the loadable
160 * @param load_addr address the loadable was loaded to
161 * @param size number of bytes loaded
162 * @param entry_point entry point (if specified, otherwise pass -1)
163 * @param type type (if specified, otherwise pass NULL)
164 * @param os os-type (if specified, otherwise pass NULL)
165 * @param arch architecture (if specified, otherwise pass NULL)
166 * Return: 0 if ok, or -1 or -FDT_ERR_... on error
168 int fdt_record_loadable(void *blob, u32 index, const char *name,
169 uintptr_t load_addr, u32 size, uintptr_t entry_point,
170 const char *type, const char *os, const char *arch);
174 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
177 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
180 * Add board-specific data to the FDT before booting the OS.
182 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
183 * This function is called if CONFIG_OF_BOARD_SETUP is defined
185 * @param blob FDT blob to update
186 * @param bd Pointer to board data
187 * Return: 0 if ok, or -FDT_ERR_... on error
189 int ft_board_setup(void *blob, struct bd_info *bd);
192 * board_rng_seed() - Provide a seed to be passed via /chosen/rng-seed
194 * This function is called if CONFIG_BOARD_RNG_SEED is set, and must
195 * be provided by the board. It should return, via @buf, some suitable
196 * seed value to pass to the kernel.
198 * @param buf A struct abuf for returning the seed and its size.
199 * @return 0 if ok, negative on error.
201 int board_rng_seed(struct abuf *buf);
204 * board_fdt_chosen_bootargs() - Arbitrarily amend fdt kernel command line
206 * This is used for late modification of kernel command line arguments just
207 * before they are added into the /chosen node in flat device tree.
209 * @return: pointer to kernel command line arguments in memory
211 char *board_fdt_chosen_bootargs(void);
214 * The keystone2 SOC requires all 32 bit aliased addresses to be converted
215 * to their 36 physical format. This has to happen after all fdt nodes
216 * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
217 * called at the end of the image_setup_libfdt() is to do that convertion.
219 void ft_board_setup_ex(void *blob, struct bd_info *bd);
222 * Add system-specific data to the FDT before booting the OS.
224 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
225 * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
227 * @param blob FDT blob to update
228 * @param bd Pointer to board data
229 * Return: 0 if ok, or -FDT_ERR_... on error
231 int ft_system_setup(void *blob, struct bd_info *bd);
233 void set_working_fdt_addr(ulong addr);
236 * shrink down the given blob to minimum size + some extrasize if required
238 * @param blob FDT blob to update
239 * @param extrasize additional bytes needed
240 * Return: 0 if ok, or -FDT_ERR_... on error
242 int fdt_shrink_to_minimum(void *blob, uint extrasize);
243 int fdt_increase_size(void *fdt, int add_len);
245 int fdt_delete_disabled_nodes(void *blob);
248 #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
249 void fdt_fixup_mtdparts(void *fdt, const struct node_info *node_info,
252 static inline void fdt_fixup_mtdparts(void *fdt,
253 const struct node_info *node_info,
260 * copy the fixed-partition nodes from U-Boot device tree to external blob
262 * @param blob FDT blob to update
263 * Return: 0 if ok, or non-zero on error
265 int fdt_copy_fixed_partitions(void *blob);
267 void fdt_del_node_and_alias(void *blob, const char *alias);
270 * Translate an address from the DT into a CPU physical address
272 * The translation relies on the "ranges" property.
274 * @param blob Pointer to device tree blob
275 * @param node_offset Node DT offset
276 * @param in_addr Pointer to the address to translate
277 * Return: translated address or OF_BAD_ADDR on error
279 u64 fdt_translate_address(const void *blob, int node_offset,
280 const __be32 *in_addr);
282 * Translate a DMA address from the DT into a CPU physical address
284 * The translation relies on the "dma-ranges" property.
286 * @param blob Pointer to device tree blob
287 * @param node_offset Node DT offset
288 * @param in_addr Pointer to the DMA address to translate
289 * Return: translated DMA address or OF_BAD_ADDR on error
291 u64 fdt_translate_dma_address(const void *blob, int node_offset,
292 const __be32 *in_addr);
295 * Get DMA ranges for a specifc node, this is useful to perform bus->cpu and
296 * cpu->bus address translations
298 * @param blob Pointer to device tree blob
299 * @param node_offset Node DT offset
300 * @param cpu Pointer to variable storing the range's cpu address
301 * @param bus Pointer to variable storing the range's bus address
302 * @param size Pointer to variable storing the range's size
303 * Return: translated DMA address or OF_BAD_ADDR on error
305 int fdt_get_dma_range(const void *blob, int node_offset, phys_addr_t *cpu,
306 dma_addr_t *bus, u64 *size);
308 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
309 phys_addr_t compat_off);
310 int fdt_node_offset_by_pathf(void *blob, const char *fmt, ...)
311 __attribute__ ((format (printf, 2, 3)));
313 #define fdt_for_each_node_by_compatible(node, fdt, start, compat) \
314 for (node = fdt_node_offset_by_compatible(fdt, start, compat); \
316 node = fdt_node_offset_by_compatible(fdt, node, compat))
318 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
319 unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
320 unsigned int fdt_create_phandle_by_compatible(void *fdt, const char *compat);
321 unsigned int fdt_create_phandle_by_pathf(void *fdt, const char *fmt, ...)
322 __attribute__ ((format (printf, 2, 3)));
323 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
325 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
327 u64 fdt_get_base_address(const void *fdt, int node);
328 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
329 uint64_t *addr, uint64_t *len);
336 int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status);
337 static inline int fdt_status_okay(void *fdt, int nodeoffset)
339 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY);
341 static inline int fdt_status_disabled(void *fdt, int nodeoffset)
343 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED);
345 static inline int fdt_status_fail(void *fdt, int nodeoffset)
347 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL);
350 int fdt_set_status_by_alias(void *fdt, const char *alias,
351 enum fdt_status status);
352 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
354 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY);
356 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
358 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED);
360 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
362 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL);
365 int fdt_set_status_by_compatible(void *fdt, const char *compat,
366 enum fdt_status status);
367 static inline int fdt_status_okay_by_compatible(void *fdt, const char *compat)
369 return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_OKAY);
371 static inline int fdt_status_disabled_by_compatible(void *fdt,
374 return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_DISABLED);
376 static inline int fdt_status_fail_by_compatible(void *fdt, const char *compat)
378 return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_FAIL);
381 int fdt_set_status_by_pathf(void *fdt, enum fdt_status status, const char *fmt,
382 ...) __attribute__ ((format (printf, 3, 4)));
383 #define fdt_status_okay_by_pathf(fdt, fmt, ...) \
384 fdt_set_status_by_pathf((fdt), FDT_STATUS_OKAY, (fmt), ##__VA_ARGS__)
385 #define fdt_status_disabled_by_pathf(fdt, fmt, ...) \
386 fdt_set_status_by_pathf((fdt), FDT_STATUS_DISABLED, (fmt), ##__VA_ARGS__)
387 #define fdt_status_fail_by_pathf(fdt, fmt, ...) \
388 fdt_set_status_by_pathf((fdt), FDT_STATUS_FAIL, (fmt), ##__VA_ARGS__)
390 /* Helper to read a big number; size is in cells (not bytes) */
391 static inline u64 fdt_read_number(const fdt32_t *cell, int size)
395 r = (r << 32) | fdt32_to_cpu(*(cell++));
399 void fdt_support_default_count_cells(const void *blob, int parentoffset,
400 int *addrc, int *sizec);
401 int ft_verify_fdt(void *fdt);
402 int arch_fixup_memory_node(void *blob);
404 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
405 u32 height, u32 stride, const char *format);
407 int fdt_overlay_apply_verbose(void *fdt, void *fdto);
409 int fdt_valid(struct fdt_header **blobp);
412 * fdt_get_cells_len() - Get the length of a type of cell in top-level nodes
414 * Returns the length of the cell type in bytes (4 or 8).
416 * @blob: Pointer to device tree blob
417 * @nr_cells_name: Name to lookup, e.g. "#address-cells"
419 int fdt_get_cells_len(const void *blob, char *nr_cells_name);
421 #endif /* ifdef CONFIG_OF_LIBFDT */
424 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
428 * Count child nodes of one parent node.
430 * @param blob FDT blob
431 * @param node parent node
432 * Return: number of child node; 0 if there is not child node
434 int fdtdec_get_child_count(const void *blob, int node);
436 #ifdef CONFIG_FMAN_ENET
437 int fdt_update_ethernet_dt(void *blob);
439 #ifdef CONFIG_FSL_MC_ENET
440 void fdt_fixup_board_enet(void *blob);
442 #ifdef CONFIG_CMD_PSTORE
443 void fdt_fixup_pstore(void *blob);
445 #endif /* ifndef __FDT_SUPPORT_H */