include/fdt_support.h

   1 /*
   2  * (C) Copyright 2007
   3  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef __FDT_SUPPORT_H
   9 #define __FDT_SUPPORT_H
  10
  11 #ifdef CONFIG_OF_LIBFDT
  12
  13 #include <libfdt.h>
  14
  15 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
  16                                 const char *prop, const u32 dflt);
  17 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
  18                                 const char *prop, const u32 dflt);
  19
  20 /**
  21  * Add data to the root of the FDT before booting the OS.
  22  *
  23  * See doc/device-tree-bindings/root.txt
  24  *
  25  * @param fdt           FDT address in memory
  26  * @return 0 if ok, or -FDT_ERR_... on error
  27  */
  28 int fdt_root(void *fdt);
  29
  30 /**
  31  * Add chosen data the FDT before booting the OS.
  32  *
  33  * In particular, this adds the kernel command line (bootargs) to the FDT.
  34  *
  35  * @param fdt           FDT address in memory
  36  * @return 0 if ok, or -FDT_ERR_... on error
  37  */
  38 int fdt_chosen(void *fdt);
  39
  40 /**
  41  * Add initrd information to the FDT before booting the OS.
  42  *
  43  * @param fdt           FDT address in memory
  44  * @return 0 if ok, or -FDT_ERR_... on error
  45  */
  46 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
  47
  48 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
  49                       const void *val, int len, int create);
  50 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
  51                           u32 val, int create);
  52
  53 static inline void do_fixup_by_path_string(void *fdt, const char *path,
  54                                            const char *prop, const char *status)
  55 {
  56         do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1);
  57 }
  58
  59 void do_fixup_by_prop(void *fdt,
  60                       const char *pname, const void *pval, int plen,
  61                       const char *prop, const void *val, int len,
  62                       int create);
  63 void do_fixup_by_prop_u32(void *fdt,
  64                           const char *pname, const void *pval, int plen,
  65                           const char *prop, u32 val, int create);
  66 void do_fixup_by_compat(void *fdt, const char *compat,
  67                         const char *prop, const void *val, int len, int create);
  68 void do_fixup_by_compat_u32(void *fdt, const char *compat,
  69                             const char *prop, u32 val, int create);
  70 /**
  71  * Setup the memory node in the DT. Creates one if none was existing before.
  72  * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the
  73  * whole memory.
  74  *
  75  * @param blob          FDT blob to update
  76  * @param start         Begin of DRAM mapping in physical memory
  77  * @param size          Size of the single memory bank
  78  * @return 0 if ok, or -1 or -FDT_ERR_... on error
  79  */
  80 int fdt_fixup_memory(void *blob, u64 start, u64 size);
  81
  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 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks);
  97
  98 void fdt_fixup_ethernet(void *fdt);
  99 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
 100                          const void *val, int len, int create);
 101 void fdt_fixup_qe_firmware(void *fdt);
 102
 103 /**
 104  * Update native-mode property of display-timings node to the phandle
 105  * of the timings matching a display by name (case insensitive).
 106  *
 107  * see kernel Documentation/devicetree/bindings/video/display-timing.txt
 108  *
 109  * @param blob          FDT blob to update
 110  * @param path          path within dt
 111  * @param display       name of display timing to match
 112  * @return 0 if ok, or -FDT_ERR_... on error
 113  */
 114 int fdt_fixup_display(void *blob, const char *path, const char *display);
 115
 116 #if defined(CONFIG_HAS_FSL_DR_USB) || defined(CONFIG_HAS_FSL_MPH_USB)
 117 void fdt_fixup_dr_usb(void *blob, bd_t *bd);
 118 #else
 119 static inline void fdt_fixup_dr_usb(void *blob, bd_t *bd) {}
 120 #endif /* defined(CONFIG_HAS_FSL_DR_USB) || defined(CONFIG_HAS_FSL_MPH_USB) */
 121
 122 #if defined(CONFIG_SYS_FSL_SEC_COMPAT)
 123 void fdt_fixup_crypto_node(void *blob, int sec_rev);
 124 #else
 125 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {}
 126 #endif
 127
 128 #ifdef CONFIG_PCI
 129 #include <pci.h>
 130 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose);
 131 #endif
 132
 133 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name);
 134
 135 /**
 136  * Add board-specific data to the FDT before booting the OS.
 137  *
 138  * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
 139  * This function is called if CONFIG_OF_BOARD_SETUP is defined
 140  *
 141  * @param blob          FDT blob to update
 142  * @param bd_t          Pointer to board data
 143  * @return 0 if ok, or -FDT_ERR_... on error
 144  */
 145 int ft_board_setup(void *blob, bd_t *bd);
 146
 147 /*
 148  * The keystone2 SOC requires all 32 bit aliased addresses to be converted
 149  * to their 36 physical format. This has to happen after all fdt nodes
 150  * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex()
 151  * called at the end of the image_setup_libfdt() is to do that convertion.
 152  */
 153 void ft_board_setup_ex(void *blob, bd_t *bd);
 154 void ft_cpu_setup(void *blob, bd_t *bd);
 155 void ft_pci_setup(void *blob, bd_t *bd);
 156
 157 /**
 158  * Add system-specific data to the FDT before booting the OS.
 159  *
 160  * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space.
 161  * This function is called if CONFIG_OF_SYSTEM_SETUP is defined
 162  *
 163  * @param blob          FDT blob to update
 164  * @param bd_t          Pointer to board data
 165  * @return 0 if ok, or -FDT_ERR_... on error
 166  */
 167 int ft_system_setup(void *blob, bd_t *bd);
 168
 169 void set_working_fdt_addr(ulong addr);
 170 int fdt_shrink_to_minimum(void *blob);
 171 int fdt_increase_size(void *fdt, int add_len);
 172
 173 int fdt_fixup_nor_flash_size(void *blob);
 174
 175 void fdt_fixup_mtdparts(void *fdt, void *node_info, int node_info_size);
 176 void fdt_del_node_and_alias(void *blob, const char *alias);
 177 u64 fdt_translate_address(void *blob, int node_offset, const __be32 *in_addr);
 178 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
 179                                         phys_addr_t compat_off);
 180 int fdt_alloc_phandle(void *blob);
 181 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
 182 unsigned int fdt_create_phandle(void *fdt, int nodeoffset);
 183 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
 184
 185 int fdt_verify_alias_address(void *fdt, int anode, const char *alias,
 186                               u64 addr);
 187 u64 fdt_get_base_address(void *fdt, int node);
 188 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
 189                    uint64_t *addr, uint64_t *len);
 190
 191 enum fdt_status {
 192         FDT_STATUS_OKAY,
 193         FDT_STATUS_DISABLED,
 194         FDT_STATUS_FAIL,
 195         FDT_STATUS_FAIL_ERROR_CODE,
 196 };
 197 int fdt_set_node_status(void *fdt, int nodeoffset,
 198                         enum fdt_status status, unsigned int error_code);
 199 static inline int fdt_status_okay(void *fdt, int nodeoffset)
 200 {
 201         return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY, 0);
 202 }
 203 static inline int fdt_status_disabled(void *fdt, int nodeoffset)
 204 {
 205         return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED, 0);
 206 }
 207 static inline int fdt_status_fail(void *fdt, int nodeoffset)
 208 {
 209         return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL, 0);
 210 }
 211
 212 int fdt_set_status_by_alias(void *fdt, const char *alias,
 213                             enum fdt_status status, unsigned int error_code);
 214 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias)
 215 {
 216         return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY, 0);
 217 }
 218 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias)
 219 {
 220         return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED, 0);
 221 }
 222 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias)
 223 {
 224         return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL, 0);
 225 }
 226
 227 /* Helper to read a big number; size is in cells (not bytes) */
 228 static inline u64 of_read_number(const fdt32_t *cell, int size)
 229 {
 230         u64 r = 0;
 231         while (size--)
 232                 r = (r << 32) | fdt32_to_cpu(*(cell++));
 233         return r;
 234 }
 235
 236 void of_bus_default_count_cells(void *blob, int parentoffset,
 237                                         int *addrc, int *sizec);
 238 int ft_verify_fdt(void *fdt);
 239 int arch_fixup_memory_node(void *blob);
 240
 241 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
 242                             u32 height, u32 stride, const char *format);
 243
 244 #endif /* ifdef CONFIG_OF_LIBFDT */
 245
 246 #ifdef USE_HOSTCC
 247 int fdtdec_get_int(const void *blob, int node, const char *prop_name,
 248                 int default_val);
 249 #endif
 250 #endif /* ifndef __FDT_SUPPORT_H */