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 #ifdef CONFIG_OF_LIBFDT
12 #include <asm/u-boot.h>
13 #include <linux/libfdt.h>
16 * arch_fixup_fdt() - Write arch-specific information to fdt
18 * Defined in arch/$(ARCH)/lib/bootm-fdt.c
20 * @blob: FDT blob to write to
21 * @return 0 if ok, or -ve FDT_ERR_... on failure
23 int arch_fixup_fdt(void *blob);
25 void ft_cpu_setup(void *blob, struct bd_info *bd);
27 void ft_pci_setup(void *blob, struct bd_info *bd);
29 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
30 const char *prop, const u32 dflt);
31 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
32 const char *prop, const u32 dflt);
35 * Add data to the root of the FDT before booting the OS.
37 * See doc/device-tree-bindings/root.txt
39 * @param fdt FDT address in memory
40 * @return 0 if ok, or -FDT_ERR_... on error
42 int fdt_root(void *fdt);
45 * Add chosen data the FDT before booting the OS.
47 * In particular, this adds the kernel command line (bootargs) to the FDT.
49 * @param fdt FDT address in memory
50 * @return 0 if ok, or -FDT_ERR_... on error
52 int fdt_chosen(void *fdt);
55 * Add initrd information to the FDT before booting the OS.
57 * @param fdt FDT address in memory
58 * @return 0 if ok, or -FDT_ERR_... on error
60 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
62 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
63 const void *val, int len, int create);
64 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
67 static inline void do_fixup_by_path_string(void *fdt, const char *path,
68 const char *prop, const char *status)
70 do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
73 void do_fixup_by_prop(void *fdt,
74 const char *pname, const void *pval, int plen,
75 const char *prop, const void *val, int len,
77 void do_fixup_by_prop_u32(void *fdt,
78 const char *pname, const void *pval, int plen,
79 const char *prop, u32 val, int create);
80 void do_fixup_by_compat(void *fdt, const char *compat,
81 const char *prop, const void *val, int len, int create);
82 void do_fixup_by_compat_u32(void *fdt, const char *compat,
83 const char *prop, u32 val, int create);
85 * Setup the memory node in the DT. Creates one if none was existing before.
86 * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
89 * @param blob FDT blob to update
90 * @param start Begin of DRAM mapping in physical memory
91 * @param size Size of the single memory bank
92 * @return 0 if ok, or -1 or -FDT_ERR_... on error
94 int fdt_fixup_memory(void *blob, u64 start, u64 size);
97 * Fill the DT memory node with multiple memory banks.
98 * Creates the node if none was existing before.
99 * If banks is 0, it will not touch the existing reg property. This allows
100 * boards to not mess with the existing DT setup, which may have been
101 * filled in properly before.
103 * @param blob FDT blob to update
104 * @param start Array of size <banks> to hold the start addresses.
105 * @param size Array of size <banks> to hold the size of each region.
106 * @param banks Number of memory banks to create. If 0, the reg
107 * property will be left untouched.
108 * @return 0 if ok, or -1 or -FDT_ERR_... on error
110 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
111 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
112 int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int banks);
114 static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
121 void fdt_fixup_ethernet(void *fdt);
122 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
123 const void *val, int len, int create);
124 void fdt_fixup_qe_firmware(void *fdt);
127 * Update native-mode property of display-timings node to the phandle
128 * of the timings matching a display by name (case insensitive).
130 * see kernel Documentation/devicetree/bindings/video/display-timing.txt
132 * @param blob FDT blob to update
133 * @param path path within dt
134 * @param display name of display timing to match
135 * @return 0 if ok, or -FDT_ERR_... on error
137 int fdt_fixup_display(void *blob, const char *path, const char *display);
139 #if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL)
140 void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd);
142 static inline void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd) {}
143 #endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */
145 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
146 void fdt_fixup_crypto_node(void *blob, int sec_rev);
148 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
152 * Record information about a processed loadable in /fit-images (creating
153 * /fit-images if necessary).
155 * @param blob FDT blob to update
156 * @param index index of this loadable
157 * @param name name of the loadable
158 * @param load_addr address the loadable was loaded to
159 * @param size number of bytes loaded
160 * @param entry_point entry point (if specified, otherwise pass -1)
161 * @param type type (if specified, otherwise pass NULL)
162 * @param os os-type (if specified, otherwise pass NULL)
163 * @return 0 if ok, or -1 or -FDT_ERR_... on error
165 int fdt_record_loadable(void *blob, u32 index, const char *name,
166 uintptr_t load_addr, u32 size, uintptr_t entry_point,
167 const char *type, const char *os);
171 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
174 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
177 * Add board-specific data to the FDT before booting the OS.
179 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
180 * This function is called if CONFIG_OF_BOARD_SETUP is defined
182 * @param blob FDT blob to update
183 * @param bd Pointer to board data
184 * @return 0 if ok, or -FDT_ERR_... on error
186 int ft_board_setup(void *blob, struct bd_info *bd);
189 * board_fdt_chosen_bootargs() - Arbitrarily amend fdt kernel command line
191 * This is used for late modification of kernel command line arguments just
192 * before they are added into the /chosen node in flat device tree.
194 * @return: pointer to kernel command line arguments in memory
196 char *board_fdt_chosen_bootargs(void);
199 * The keystone2 SOC requires all 32 bit aliased addresses to be converted
200 * to their 36 physical format. This has to happen after all fdt nodes
201 * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
202 * called at the end of the image_setup_libfdt() is to do that convertion.
204 void ft_board_setup_ex(void *blob, struct bd_info *bd);
205 void ft_cpu_setup(void *blob, struct bd_info *bd);
206 void ft_pci_setup(void *blob, struct bd_info *bd);
209 * Add system-specific data to the FDT before booting the OS.
211 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
212 * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
214 * @param blob FDT blob to update
215 * @param bd Pointer to board data
216 * @return 0 if ok, or -FDT_ERR_... on error
218 int ft_system_setup(void *blob, struct bd_info *bd);
220 void set_working_fdt_addr(ulong addr);
223 * shrink down the given blob to minimum size + some extrasize if required
225 * @param blob FDT blob to update
226 * @param extrasize additional bytes needed
227 * @return 0 if ok, or -FDT_ERR_... on error
229 int fdt_shrink_to_minimum(void *blob, uint extrasize);
230 int fdt_increase_size(void *fdt, int add_len);
232 int fdt_fixup_nor_flash_size(void *blob);
235 #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
236 void fdt_fixup_mtdparts(void *fdt, const struct node_info *node_info,
239 static inline void fdt_fixup_mtdparts(void *fdt,
240 const struct node_info *node_info,
246 void fdt_del_node_and_alias(void *blob, const char *alias);
249 * Translate an address from the DT into a CPU physical address
251 * The translation relies on the "ranges" property.
253 * @param blob Pointer to device tree blob
254 * @param node_offset Node DT offset
255 * @param in_addr Pointer to the address to translate
256 * @return translated address or OF_BAD_ADDR on error
258 u64 fdt_translate_address(const void *blob, int node_offset,
259 const __be32 *in_addr);
261 * Translate a DMA address from the DT into a CPU physical address
263 * The translation relies on the "dma-ranges" property.
265 * @param blob Pointer to device tree blob
266 * @param node_offset Node DT offset
267 * @param in_addr Pointer to the DMA address to translate
268 * @return translated DMA address or OF_BAD_ADDR on error
270 u64 fdt_translate_dma_address(const void *blob, int node_offset,
271 const __be32 *in_addr);
274 * Get DMA ranges for a specifc node, this is useful to perform bus->cpu and
275 * cpu->bus address translations
277 * @param blob Pointer to device tree blob
278 * @param node_offset Node DT offset
279 * @param cpu Pointer to variable storing the range's cpu address
280 * @param bus Pointer to variable storing the range's bus address
281 * @param size Pointer to variable storing the range's size
282 * @return translated DMA address or OF_BAD_ADDR on error
284 int fdt_get_dma_range(const void *blob, int node_offset, phys_addr_t *cpu,
285 dma_addr_t *bus, u64 *size);
287 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
288 phys_addr_t compat_off);
289 int fdt_alloc_phandle(void *blob);
290 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
291 unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
292 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
294 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
296 u64 fdt_get_base_address(const void *fdt, int node);
297 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
298 uint64_t *addr, uint64_t *len);
304 FDT_STATUS_FAIL_ERROR_CODE,
306 int fdt_set_node_status(void *fdt, int nodeoffset,
307 enum fdt_status status, unsigned int error_code);
308 static inline int fdt_status_okay(void *fdt, int nodeoffset)
310 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY, 0);
312 static inline int fdt_status_disabled(void *fdt, int nodeoffset)
314 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED, 0);
316 static inline int fdt_status_fail(void *fdt, int nodeoffset)
318 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL, 0);
321 int fdt_set_status_by_alias(void *fdt, const char *alias,
322 enum fdt_status status, unsigned int error_code);
323 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
325 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY, 0);
327 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
329 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED, 0);
331 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
333 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL, 0);
336 /* Helper to read a big number; size is in cells (not bytes) */
337 static inline u64 fdt_read_number(const fdt32_t *cell, int size)
341 r = (r << 32) | fdt32_to_cpu(*(cell++));
345 void fdt_support_default_count_cells(const void *blob, int parentoffset,
346 int *addrc, int *sizec);
347 int ft_verify_fdt(void *fdt);
348 int arch_fixup_memory_node(void *blob);
350 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
351 u32 height, u32 stride, const char *format);
353 int fdt_overlay_apply_verbose(void *fdt, void *fdto);
355 int fdt_valid(struct fdt_header **blobp);
358 * fdt_get_cells_len() - Get the length of a type of cell in top-level nodes
360 * Returns the length of the cell type in bytes (4 or 8).
362 * @blob: Pointer to device tree blob
363 * @nr_cells_name: Name to lookup, e.g. "#address-cells"
365 int fdt_get_cells_len(const void *blob, char *nr_cells_name);
367 #endif /* ifdef CONFIG_OF_LIBFDT */
370 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
374 * Count child nodes of one parent node.
376 * @param blob FDT blob
377 * @param node parent node
378 * @return number of child node; 0 if there is not child node
380 int fdtdec_get_child_count(const void *blob, int node);
382 #ifdef CONFIG_FMAN_ENET
383 int fdt_update_ethernet_dt(void *blob);
385 #ifdef CONFIG_FSL_MC_ENET
386 void fdt_fixup_board_enet(void *blob);
388 #ifdef CONFIG_CMD_PSTORE
389 void fdt_fixup_pstore(void *blob);
391 #endif /* ifndef __FDT_SUPPORT_H */