include/fdt_support.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * (C) Copyright 2007
   4  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
   5  */
   6
   7 #ifndef __FDT_SUPPORT_H
   8 #define __FDT_SUPPORT_H
   9
  10 #if !defined(USE_HOSTCC)
  11
  12 #include <asm/u-boot.h>
  13 #include <linux/libfdt.h>
  14 #include <abuf.h>
  15
  16 /**
  17  * arch_fixup_fdt() - Write arch-specific information to fdt
  18  *
  19  * Defined in arch/$(ARCH)/lib/bootm-fdt.c
  20  *
  21  * @blob:       FDT blob to write to
  22  * Return: 0 if ok, or -ve FDT_ERR_... on failure
  23  */
  24 int arch_fixup_fdt(void *blob);
  25
  26 void ft_cpu_setup(void *blob, struct bd_info *bd);
  27
  28 void ft_pci_setup(void *blob, struct bd_info *bd);
  29
  30 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
  31                                 const char *prop, const u32 dflt);
  32 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
  33                                 const char *prop, const u32 dflt);
  34
  35 /**
  36  * Add data to the root of the FDT before booting the OS.
  37  *
  38  * See doc/device-tree-bindings/root.txt
  39  *
  40  * @param fdt           FDT address in memory
  41  * Return: 0 if ok, or -FDT_ERR_... on error
  42  */
  43 int fdt_root(void *fdt);
  44
  45 /**
  46  * Add chosen data the FDT before booting the OS.
  47  *
  48  * In particular, this adds the kernel command line (bootargs) to the FDT.
  49  *
  50  * @param fdt           FDT address in memory
  51  * Return: 0 if ok, or -FDT_ERR_... on error
  52  */
  53 int fdt_chosen(void *fdt);
  54
  55 /**
  56  * Add initrd information to the FDT before booting the OS.
  57  *
  58  * Adds linux,initrd-start and linux,initrd-end properties to the /chosen node,
  59  * creating it if necessary.
  60  *
  61  * A memory reservation for the ramdisk is added to the FDT, or an existing one
  62  * (with matching @initrd_start) updated.
  63  *
  64  * If @initrd_start == @initrd_end this function does nothing and returns 0.
  65  *
  66  * @fdt: Pointer to FDT in memory
  67  * @initrd_start: Start of ramdisk
  68  * @initrd_end: End of ramdisk
  69  * Return: 0 if ok, or -FDT_ERR_... on error
  70  */
  71 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
  72
  73 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
  74                       const void *val, int len, int create);
  75 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
  76                           u32 val, int create);
  77
  78 static inline void do_fixup_by_path_string(void *fdt, const char *path,
  79                                            const char *prop, const char *status)
  80 {
  81         do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
  82 }
  83
  84 void do_fixup_by_prop(void *fdt,
  85                       const char *pname, const void *pval, int plen,
  86                       const char *prop, const void *val, int len,
  87                       int create);
  88 void do_fixup_by_prop_u32(void *fdt,
  89                           const char *pname, const void *pval, int plen,
  90                           const char *prop, u32 val, int create);
  91 void do_fixup_by_compat(void *fdt, const char *compat,
  92                         const char *prop, const void *val, int len, int create);
  93 void do_fixup_by_compat_u32(void *fdt, const char *compat,
  94                             const char *prop, u32 val, int create);
  95 /**
  96  * Setup the memory node in the DT. Creates one if none was existing before.
  97  * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
  98  * whole memory.
  99  *
 100  * @param blob          FDT blob to update
 101  * @param start         Begin of DRAM mapping in physical memory
 102  * @param size          Size of the single memory bank
 103  * Return: 0 if ok, or -1 or -FDT_ERR_... on error
 104  */
 105 int fdt_fixup_memory(void *blob, u64 start, u64 size);
 106
 107 /**
 108  * Fill the DT memory node with multiple memory banks.
 109  * Creates the node if none was existing before.
 110  * If banks is 0, it will not touch the existing reg property. This allows
 111  * boards to not mess with the existing DT setup, which may have been
 112  * filled in properly before.
 113  *
 114  * @param blob          FDT blob to update
 115  * @param start         Array of size <banks> to hold the start addresses.
 116  * @param size          Array of size <banks> to hold the size of each region.
 117  * @param banks         Number of memory banks to create. If 0, the reg
 118  *                      property will be left untouched.
 119  * Return: 0 if ok, or -1 or -FDT_ERR_... on error
 120  */
 121 #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
 122 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
 123 int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int banks);
 124 #else
 125 static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[],
 126                                          int banks)
 127 {
 128         return 0;
 129 }
 130 #endif
 131
 132 void fdt_fixup_ethernet(void *fdt);
 133 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
 134                          const void *val, int len, int create);
 135 void fdt_fixup_qe_firmware(void *fdt);
 136
 137 /**
 138  * Update native-mode property of display-timings node to the phandle
 139  * of the timings matching a display by name (case insensitive).
 140  *
 141  * see kernel Documentation/devicetree/bindings/video/display-timing.txt
 142  *
 143  * @param blob          FDT blob to update
 144  * @param path          path within dt
 145  * @param display       name of display timing to match
 146  * Return: 0 if ok, or -FDT_ERR_... on error
 147  */
 148 int fdt_fixup_display(void *blob, const char *path, const char *display);
 149
 150 #if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL)
 151 void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd);
 152 #else
 153 static inline void fsl_fdt_fixup_dr_usb(void *blob, struct bd_info *bd) {}
 154 #endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */
 155
 156 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
 157 void fdt_fixup_crypto_node(void *blob, int sec_rev);
 158 #else
 159 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
 160 #endif
 161
 162 /**
 163  * Record information about a processed loadable in /fit-images (creating
 164  * /fit-images if necessary).
 165  *
 166  * @param blob          FDT blob to update
 167  * @param index         index of this loadable
 168  * @param name          name of the loadable
 169  * @param load_addr     address the loadable was loaded to
 170  * @param size          number of bytes loaded
 171  * @param entry_point   entry point (if specified, otherwise pass -1)
 172  * @param type          type (if specified, otherwise pass NULL)
 173  * @param os            os-type (if specified, otherwise pass NULL)
 174  * @param arch          architecture (if specified, otherwise pass NULL)
 175  * Return: 0 if ok, or -1 or -FDT_ERR_... on error
 176  */
 177 int fdt_record_loadable(void *blob, u32 index, const char *name,
 178                         uintptr_t load_addr, u32 size, uintptr_t entry_point,
 179                         const char *type, const char *os, const char *arch);
 180
 181 #ifdef CONFIG_PCI
 182 #include <pci.h>
 183 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
 184 #endif
 185
 186 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
 187
 188 /**
 189  * Add board-specific data to the FDT before booting the OS.
 190  *
 191  * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
 192  * This function is called if CONFIG_OF_BOARD_SETUP is defined
 193  *
 194  * @param blob          FDT blob to update
 195  * @param bd            Pointer to board data
 196  * Return: 0 if ok, or -FDT_ERR_... on error
 197  */
 198 int ft_board_setup(void *blob, struct bd_info *bd);
 199
 200 /**
 201  * board_rng_seed() - Provide a seed to be passed via /chosen/rng-seed
 202  *
 203  * This function is called if CONFIG_BOARD_RNG_SEED is set, and must
 204  * be provided by the board. It should return, via @buf, some suitable
 205  * seed value to pass to the kernel.
 206  *
 207  * @param buf         A struct abuf for returning the seed and its size.
 208  * @return            0 if ok, negative on error.
 209  */
 210 int board_rng_seed(struct abuf *buf);
 211
 212 /**
 213  * board_fdt_chosen_bootargs() - Arbitrarily amend fdt kernel command line
 214  *
 215  * This is used for late modification of kernel command line arguments just
 216  * before they are added into the /chosen node in flat device tree.
 217  *
 218  * @return: pointer to kernel command line arguments in memory
 219  */
 220 char *board_fdt_chosen_bootargs(void);
 221
 222 /*
 223  * The keystone2 SOC requires all 32 bit aliased addresses to be converted
 224  * to their 36 physical format. This has to happen after all fdt nodes
 225  * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
 226  * called at the end of the image_setup_libfdt() is to do that convertion.
 227  */
 228 void ft_board_setup_ex(void *blob, struct bd_info *bd);
 229
 230 /**
 231  * Add system-specific data to the FDT before booting the OS.
 232  *
 233  * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
 234  * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
 235  *
 236  * @param blob          FDT blob to update
 237  * @param bd            Pointer to board data
 238  * Return: 0 if ok, or -FDT_ERR_... on error
 239  */
 240 int ft_system_setup(void *blob, struct bd_info *bd);
 241
 242 void set_working_fdt_addr(ulong addr);
 243
 244 /**
 245  * fdt_shrink_to_minimum() - shrink FDT while allowing for some margin
 246  *
 247  * Shrink down the given blob to 'minimum' size + some extrasize.
 248  *
 249  * The new size is enough to hold the existing contents plus @extrasize bytes,
 250  * plus 5 memory reservations. Also, the end of the FDT is aligned to a 4KB
 251  * boundary, so it might end up up to 4KB larger than needed.
 252  *
 253  * If there is an existing memory reservation for @blob in the FDT, it is
 254  * updated for the new size.
 255  *
 256  * @param blob          FDT blob to update
 257  * @param extrasize     additional bytes needed
 258  * Return: 0 if ok, or -FDT_ERR_... on error
 259  */
 260 int fdt_shrink_to_minimum(void *blob, uint extrasize);
 261
 262 int fdt_increase_size(void *fdt, int add_len);
 263
 264 int fdt_delete_disabled_nodes(void *blob);
 265
 266 struct node_info;
 267 #if defined(CONFIG_FDT_FIXUP_PARTITIONS)
 268 void fdt_fixup_mtdparts(void *fdt, const struct node_info *node_info,
 269                         int node_info_size);
 270 #else
 271 static inline void fdt_fixup_mtdparts(void *fdt,
 272                                       const struct node_info *node_info,
 273                                       int node_info_size)
 274 {
 275 }
 276 #endif
 277
 278 /**
 279  * copy the fixed-partition nodes from U-Boot device tree to external blob
 280  *
 281  * @param blob          FDT blob to update
 282  * Return: 0 if ok, or non-zero on error
 283  */
 284 int fdt_copy_fixed_partitions(void *blob);
 285
 286 void fdt_del_node_and_alias(void *blob, const char *alias);
 287
 288 /**
 289  * Translate an address from the DT into a CPU physical address
 290  *
 291  * The translation relies on the "ranges" property.
 292  *
 293  * @param blob          Pointer to device tree blob
 294  * @param node_offset   Node DT offset
 295  * @param in_addr       Pointer to the address to translate
 296  * Return: translated address or OF_BAD_ADDR on error
 297  */
 298 u64 fdt_translate_address(const void *blob, int node_offset,
 299                           const __be32 *in_addr);
 300 /**
 301  * Translate a DMA address from the DT into a CPU physical address
 302  *
 303  * The translation relies on the "dma-ranges" property.
 304  *
 305  * @param blob          Pointer to device tree blob
 306  * @param node_offset   Node DT offset
 307  * @param in_addr       Pointer to the DMA address to translate
 308  * Return: translated DMA address or OF_BAD_ADDR on error
 309  */
 310 u64 fdt_translate_dma_address(const void *blob, int node_offset,
 311                               const __be32 *in_addr);
 312
 313 /**
 314  * Get DMA ranges for a specifc node, this is useful to perform bus->cpu and
 315  * cpu->bus address translations
 316  *
 317  * @param blob          Pointer to device tree blob
 318  * @param node_offset   Node DT offset
 319  * @param cpu           Pointer to variable storing the range's cpu address
 320  * @param bus           Pointer to variable storing the range's bus address
 321  * @param size          Pointer to variable storing the range's size
 322  * Return: translated DMA address or OF_BAD_ADDR on error
 323  */
 324 int fdt_get_dma_range(const void *blob, int node_offset, phys_addr_t *cpu,
 325                       dma_addr_t *bus, u64 *size);
 326
 327 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
 328                                         phys_addr_t compat_off);
 329 int fdt_node_offset_by_pathf(void *blob, const char *fmt, ...)
 330         __attribute__ ((format (printf, 2, 3)));
 331
 332 #define fdt_for_each_node_by_compatible(node, fdt, start, compat)       \
 333         for (node = fdt_node_offset_by_compatible(fdt, start, compat);  \
 334              node >= 0;                                                 \
 335              node = fdt_node_offset_by_compatible(fdt, node, compat))
 336
 337 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
 338 unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
 339 unsigned int fdt_create_phandle_by_compatible(void *fdt, const char *compat);
 340 unsigned int fdt_create_phandle_by_pathf(void *fdt, const char *fmt, ...)
 341         __attribute__ ((format (printf, 2, 3)));
 342 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
 343
 344 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
 345                               u64 addr);
 346 u64 fdt_get_base_address(const void *fdt, int node);
 347 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
 348                    uint64_t *addr, uint64_t *len);
 349
 350 enum fdt_status {
 351         FDT_STATUS_OKAY,
 352         FDT_STATUS_DISABLED,
 353         FDT_STATUS_FAIL,
 354 };
 355 int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status);
 356 static inline int fdt_status_okay(void *fdt, int nodeoffset)
 357 {
 358         return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY);
 359 }
 360 static inline int fdt_status_disabled(void *fdt, int nodeoffset)
 361 {
 362         return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED);
 363 }
 364 static inline int fdt_status_fail(void *fdt, int nodeoffset)
 365 {
 366         return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL);
 367 }
 368
 369 int fdt_set_status_by_alias(void *fdt, const char *alias,
 370                             enum fdt_status status);
 371 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
 372 {
 373         return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY);
 374 }
 375 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
 376 {
 377         return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED);
 378 }
 379 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
 380 {
 381         return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL);
 382 }
 383
 384 int fdt_set_status_by_compatible(void *fdt, const char *compat,
 385                                  enum fdt_status status);
 386 static inline int fdt_status_okay_by_compatible(void *fdt, const char *compat)
 387 {
 388         return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_OKAY);
 389 }
 390 static inline int fdt_status_disabled_by_compatible(void *fdt,
 391                                                     const char *compat)
 392 {
 393         return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_DISABLED);
 394 }
 395 static inline int fdt_status_fail_by_compatible(void *fdt, const char *compat)
 396 {
 397         return fdt_set_status_by_compatible(fdt, compat, FDT_STATUS_FAIL);
 398 }
 399
 400 int fdt_set_status_by_pathf(void *fdt, enum fdt_status status, const char *fmt,
 401                             ...) __attribute__ ((format (printf, 3, 4)));
 402 #define fdt_status_okay_by_pathf(fdt, fmt, ...) \
 403         fdt_set_status_by_pathf((fdt), FDT_STATUS_OKAY, (fmt), ##__VA_ARGS__)
 404 #define fdt_status_disabled_by_pathf(fdt, fmt, ...) \
 405         fdt_set_status_by_pathf((fdt), FDT_STATUS_DISABLED, (fmt), ##__VA_ARGS__)
 406 #define fdt_status_fail_by_pathf(fdt, fmt, ...) \
 407         fdt_set_status_by_pathf((fdt), FDT_STATUS_FAIL, (fmt), ##__VA_ARGS__)
 408
 409 /* Helper to read a big number; size is in cells (not bytes) */
 410 static inline u64 fdt_read_number(const fdt32_t *cell, int size)
 411 {
 412         u64 r = 0;
 413         while (size--)
 414                 r = (r << 32) | fdt32_to_cpu(*(cell++));
 415         return r;
 416 }
 417
 418 void fdt_support_default_count_cells(const void *blob, int parentoffset,
 419                                         int *addrc, int *sizec);
 420 int ft_verify_fdt(void *fdt);
 421 int arch_fixup_memory_node(void *blob);
 422
 423 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
 424                             u32 height, u32 stride, const char *format);
 425
 426 int fdt_overlay_apply_verbose(void *fdt, void *fdto);
 427
 428 int fdt_valid(struct fdt_header **blobp);
 429
 430 /**
 431  * fdt_get_cells_len() - Get the length of a type of cell in top-level nodes
 432  *
 433  * Returns the length of the cell type in bytes (4 or 8).
 434  *
 435  * @blob: Pointer to device tree blob
 436  * @nr_cells_name: Name to lookup, e.g. "#address-cells"
 437  */
 438 int fdt_get_cells_len(const void *blob, char *nr_cells_name);
 439
 440 #endif /* !USE_HOSTCC */
 441
 442 #ifdef USE_HOSTCC
 443 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
 444                 int default_val);
 445
 446 /*
 447  * Count child nodes of one parent node.
 448  *
 449  * @param blob  FDT blob
 450  * @param node  parent node
 451  * Return: number of child node; 0 if there is not child node
 452  */
 453 int fdtdec_get_child_count(const void *blob, int node);
 454 #endif
 455 #ifdef CONFIG_FMAN_ENET
 456 int fdt_update_ethernet_dt(void *blob);
 457 #endif
 458 #ifdef CONFIG_FSL_MC_ENET
 459 void fdt_fixup_board_enet(void *blob);
 460 #endif
 461 #ifdef CONFIG_CMD_PSTORE
 462 void fdt_fixup_pstore(void *blob);
 463 #endif
 464 #endif /* ifndef __FDT_SUPPORT_H */