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 int fdt_fixup_memory(void *blob, u64 start, u64 size); 71 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks); 72 void fdt_fixup_ethernet(void *fdt); 73 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 74 const void *val, int len, int create); 75 void fdt_fixup_qe_firmware(void *fdt); 76 77 /** 78 * Update native-mode property of display-timings node to the phandle 79 * of the timings matching a display by name (case insensitive). 80 * 81 * see kernel Documentation/devicetree/bindings/video/display-timing.txt 82 * 83 * @param blob FDT blob to update 84 * @param path path within dt 85 * @param display name of display timing to match 86 * @return 0 if ok, or -FDT_ERR_... on error 87 */ 88 int fdt_fixup_display(void *blob, const char *path, const char *display); 89 90 #if defined(CONFIG_HAS_FSL_DR_USB) || defined(CONFIG_HAS_FSL_MPH_USB) 91 void fdt_fixup_dr_usb(void *blob, bd_t *bd); 92 #else 93 static inline void fdt_fixup_dr_usb(void *blob, bd_t *bd) {} 94 #endif /* defined(CONFIG_HAS_FSL_DR_USB) || defined(CONFIG_HAS_FSL_MPH_USB) */ 95 96 #if defined(CONFIG_SYS_FSL_SEC_COMPAT) 97 void fdt_fixup_crypto_node(void *blob, int sec_rev); 98 #else 99 static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {} 100 #endif 101 102 #ifdef CONFIG_PCI 103 #include <pci.h> 104 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose); 105 #endif 106 107 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name); 108 109 /** 110 * Add board-specific data to the FDT before booting the OS. 111 * 112 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space. 113 * This function is called if CONFIG_OF_BOARD_SETUP is defined 114 * 115 * @param blob FDT blob to update 116 * @param bd_t Pointer to board data 117 * @return 0 if ok, or -FDT_ERR_... on error 118 */ 119 int ft_board_setup(void *blob, bd_t *bd); 120 121 /* 122 * The keystone2 SOC requires all 32 bit aliased addresses to be converted 123 * to their 36 physical format. This has to happen after all fdt nodes 124 * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex() 125 * called at the end of the image_setup_libfdt() is to do that convertion. 126 */ 127 void ft_board_setup_ex(void *blob, bd_t *bd); 128 void ft_cpu_setup(void *blob, bd_t *bd); 129 void ft_pci_setup(void *blob, bd_t *bd); 130 131 /** 132 * Add system-specific data to the FDT before booting the OS. 133 * 134 * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space. 135 * This function is called if CONFIG_OF_SYSTEM_SETUP is defined 136 * 137 * @param blob FDT blob to update 138 * @param bd_t Pointer to board data 139 * @return 0 if ok, or -FDT_ERR_... on error 140 */ 141 int ft_system_setup(void *blob, bd_t *bd); 142 143 void set_working_fdt_addr(ulong addr); 144 int fdt_shrink_to_minimum(void *blob); 145 int fdt_increase_size(void *fdt, int add_len); 146 147 int fdt_fixup_nor_flash_size(void *blob); 148 149 void fdt_fixup_mtdparts(void *fdt, void *node_info, int node_info_size); 150 void fdt_del_node_and_alias(void *blob, const char *alias); 151 u64 fdt_translate_address(void *blob, int node_offset, const __be32 *in_addr); 152 int fdt_node_offset_by_compat_reg(void *blob, const char *compat, 153 phys_addr_t compat_off); 154 int fdt_alloc_phandle(void *blob); 155 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle); 156 unsigned int fdt_create_phandle(void *fdt, int nodeoffset); 157 int fdt_add_edid(void *blob, const char *compat, unsigned char *buf); 158 159 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, 160 u64 addr); 161 u64 fdt_get_base_address(void *fdt, int node); 162 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, 163 uint64_t *addr, uint64_t *len); 164 165 enum fdt_status { 166 FDT_STATUS_OKAY, 167 FDT_STATUS_DISABLED, 168 FDT_STATUS_FAIL, 169 FDT_STATUS_FAIL_ERROR_CODE, 170 }; 171 int fdt_set_node_status(void *fdt, int nodeoffset, 172 enum fdt_status status, unsigned int error_code); 173 static inline int fdt_status_okay(void *fdt, int nodeoffset) 174 { 175 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY, 0); 176 } 177 static inline int fdt_status_disabled(void *fdt, int nodeoffset) 178 { 179 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED, 0); 180 } 181 static inline int fdt_status_fail(void *fdt, int nodeoffset) 182 { 183 return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL, 0); 184 } 185 186 int fdt_set_status_by_alias(void *fdt, const char *alias, 187 enum fdt_status status, unsigned int error_code); 188 static inline int fdt_status_okay_by_alias(void *fdt, const char *alias) 189 { 190 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY, 0); 191 } 192 static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias) 193 { 194 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED, 0); 195 } 196 static inline int fdt_status_fail_by_alias(void *fdt, const char *alias) 197 { 198 return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL, 0); 199 } 200 201 /* Helper to read a big number; size is in cells (not bytes) */ 202 static inline u64 of_read_number(const fdt32_t *cell, int size) 203 { 204 u64 r = 0; 205 while (size--) 206 r = (r << 32) | fdt32_to_cpu(*(cell++)); 207 return r; 208 } 209 210 void of_bus_default_count_cells(void *blob, int parentoffset, 211 int *addrc, int *sizec); 212 int ft_verify_fdt(void *fdt); 213 int arch_fixup_memory_node(void *blob); 214 215 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, 216 u32 height, u32 stride, const char *format); 217 218 #endif /* ifdef CONFIG_OF_LIBFDT */ 219 220 #ifdef USE_HOSTCC 221 int fdtdec_get_int(const void *blob, int node, const char *prop_name, 222 int default_val); 223 #endif 224 #endif /* ifndef __FDT_SUPPORT_H */ 225