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Diffstat (limited to 'include/fdt_support.h')
| -rw-r--r-- | include/fdt_support.h | 337 |
1 files changed, 337 insertions, 0 deletions
diff --git a/include/fdt_support.h b/include/fdt_support.h new file mode 100644 index 0000000..cefb2b2 --- /dev/null +++ b/include/fdt_support.h @@ -0,0 +1,337 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2007 + * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com + */ + +#ifndef __FDT_SUPPORT_H +#define __FDT_SUPPORT_H + +#ifdef CONFIG_OF_LIBFDT + +#include <linux/libfdt.h> + +u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, + const char *prop, const u32 dflt); +u32 fdt_getprop_u32_default(const void *fdt, const char *path, + const char *prop, const u32 dflt); + +/** + * Add data to the root of the FDT before booting the OS. + * + * See doc/device-tree-bindings/root.txt + * + * @param fdt FDT address in memory + * @return 0 if ok, or -FDT_ERR_... on error + */ +int fdt_root(void *fdt); + +/** + * Add chosen data the FDT before booting the OS. + * + * In particular, this adds the kernel command line (bootargs) to the FDT. + * + * @param fdt FDT address in memory + * @return 0 if ok, or -FDT_ERR_... on error + */ +int fdt_chosen(void *fdt); + +/** + * Add initrd information to the FDT before booting the OS. + * + * @param fdt FDT address in memory + * @return 0 if ok, or -FDT_ERR_... on error + */ +int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end); + +void do_fixup_by_path(void *fdt, const char *path, const char *prop, + const void *val, int len, int create); +void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, + u32 val, int create); + +static inline void do_fixup_by_path_string(void *fdt, const char *path, + const char *prop, const char *status) +{ + do_fixup_by_path(fdt, path, prop, status, strlen(status) + 1, 1); +} + +void do_fixup_by_prop(void *fdt, + const char *pname, const void *pval, int plen, + const char *prop, const void *val, int len, + int create); +void do_fixup_by_prop_u32(void *fdt, + const char *pname, const void *pval, int plen, + const char *prop, u32 val, int create); +void do_fixup_by_compat(void *fdt, const char *compat, + const char *prop, const void *val, int len, int create); +void do_fixup_by_compat_u32(void *fdt, const char *compat, + const char *prop, u32 val, int create); +/** + * Setup the memory node in the DT. Creates one if none was existing before. + * Calls fdt_fixup_memory_banks() to populate a single reg pair covering the + * whole memory. + * + * @param blob FDT blob to update + * @param start Begin of DRAM mapping in physical memory + * @param size Size of the single memory bank + * @return 0 if ok, or -1 or -FDT_ERR_... on error + */ +int fdt_fixup_memory(void *blob, u64 start, u64 size); + +/** + * Fill the DT memory node with multiple memory banks. + * Creates the node if none was existing before. + * If banks is 0, it will not touch the existing reg property. This allows + * boards to not mess with the existing DT setup, which may have been + * filled in properly before. + * + * @param blob FDT blob to update + * @param start Array of size <banks> to hold the start addresses. + * @param size Array of size <banks> to hold the size of each region. + * @param banks Number of memory banks to create. If 0, the reg + * property will be left untouched. + * @return 0 if ok, or -1 or -FDT_ERR_... on error + */ +#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY +int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks); +#else +static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], + int banks) +{ + return 0; +} +#endif + +void fdt_fixup_ethernet(void *fdt); +int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, + const void *val, int len, int create); +void fdt_fixup_qe_firmware(void *fdt); + +/** + * Update native-mode property of display-timings node to the phandle + * of the timings matching a display by name (case insensitive). + * + * see kernel Documentation/devicetree/bindings/video/display-timing.txt + * + * @param blob FDT blob to update + * @param path path within dt + * @param display name of display timing to match + * @return 0 if ok, or -FDT_ERR_... on error + */ +int fdt_fixup_display(void *blob, const char *path, const char *display); + +#if defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) +void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd); +#else +static inline void fsl_fdt_fixup_dr_usb(void *blob, bd_t *bd) {} +#endif /* defined(CONFIG_USB_EHCI_FSL) || defined(CONFIG_USB_XHCI_FSL) */ + +#if defined(CONFIG_SYS_FSL_SEC_COMPAT) +void fdt_fixup_crypto_node(void *blob, int sec_rev); +#else +static inline void fdt_fixup_crypto_node(void *blob, int sec_rev) {} +#endif + +/** + * Record information about a processed loadable in /fit-images (creating + * /fit-images if necessary). + * + * @param blob FDT blob to update + * @param index index of this loadable + * @param name name of the loadable + * @param load_addr address the loadable was loaded to + * @param size number of bytes loaded + * @param entry_point entry point (if specified, otherwise pass -1) + * @param type type (if specified, otherwise pass NULL) + * @param os os-type (if specified, otherwise pass NULL) + * @return 0 if ok, or -1 or -FDT_ERR_... on error + */ +int fdt_record_loadable(void *blob, u32 index, const char *name, + uintptr_t load_addr, u32 size, uintptr_t entry_point, + const char *type, const char *os); + +#ifdef CONFIG_PCI +#include <pci.h> +int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose); +#endif + +int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name); + +/** + * Add board-specific data to the FDT before booting the OS. + * + * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space. + * This function is called if CONFIG_OF_BOARD_SETUP is defined + * + * @param blob FDT blob to update + * @param bd_t Pointer to board data + * @return 0 if ok, or -FDT_ERR_... on error + */ +int ft_board_setup(void *blob, bd_t *bd); + +/* + * The keystone2 SOC requires all 32 bit aliased addresses to be converted + * to their 36 physical format. This has to happen after all fdt nodes + * are added or modified by the image_setup_libfdt(). The ft_board_setup_ex() + * called at the end of the image_setup_libfdt() is to do that convertion. + */ +void ft_board_setup_ex(void *blob, bd_t *bd); +void ft_cpu_setup(void *blob, bd_t *bd); +void ft_pci_setup(void *blob, bd_t *bd); + +/** + * Add system-specific data to the FDT before booting the OS. + * + * Use CONFIG_SYS_FDT_PAD to ensure there is sufficient space. + * This function is called if CONFIG_OF_SYSTEM_SETUP is defined + * + * @param blob FDT blob to update + * @param bd_t Pointer to board data + * @return 0 if ok, or -FDT_ERR_... on error + */ +int ft_system_setup(void *blob, bd_t *bd); + +void set_working_fdt_addr(ulong addr); + +/** + * shrink down the given blob to minimum size + some extrasize if required + * + * @param blob FDT blob to update + * @param extrasize additional bytes needed + * @return 0 if ok, or -FDT_ERR_... on error + */ +int fdt_shrink_to_minimum(void *blob, uint extrasize); +int fdt_increase_size(void *fdt, int add_len); + +int fdt_fixup_nor_flash_size(void *blob); + +struct node_info; +#if defined(CONFIG_FDT_FIXUP_PARTITIONS) +void fdt_fixup_mtdparts(void *fdt, const struct node_info *node_info, + int node_info_size); +#else +static inline void fdt_fixup_mtdparts(void *fdt, + const struct node_info *node_info, + int node_info_size) +{ +} +#endif + +void fdt_del_node_and_alias(void *blob, const char *alias); + +/** + * Translate an address from the DT into a CPU physical address + * + * The translation relies on the "ranges" property. + * + * @param blob Pointer to device tree blob + * @param node_offset Node DT offset + * @param in_addr Pointer to the address to translate + * @return translated address or OF_BAD_ADDR on error + */ +u64 fdt_translate_address(const void *blob, int node_offset, + const __be32 *in_addr); +/** + * Translate a DMA address from the DT into a CPU physical address + * + * The translation relies on the "dma-ranges" property. + * + * @param blob Pointer to device tree blob + * @param node_offset Node DT offset + * @param in_addr Pointer to the DMA address to translate + * @return translated DMA address or OF_BAD_ADDR on error + */ +u64 fdt_translate_dma_address(const void *blob, int node_offset, + const __be32 *in_addr); + +int fdt_node_offset_by_compat_reg(void *blob, const char *compat, + phys_addr_t compat_off); +int fdt_alloc_phandle(void *blob); +int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle); +unsigned int fdt_create_phandle(void *fdt, int nodeoffset); +int fdt_add_edid(void *blob, const char *compat, unsigned char *buf); + +int fdt_verify_alias_address(void *fdt, int anode, const char *alias, + u64 addr); +u64 fdt_get_base_address(const void *fdt, int node); +int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr, + uint64_t *addr, uint64_t *len); + +enum fdt_status { + FDT_STATUS_OKAY, + FDT_STATUS_DISABLED, + FDT_STATUS_FAIL, + FDT_STATUS_FAIL_ERROR_CODE, +}; +int fdt_set_node_status(void *fdt, int nodeoffset, + enum fdt_status status, unsigned int error_code); +static inline int fdt_status_okay(void *fdt, int nodeoffset) +{ + return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_OKAY, 0); +} +static inline int fdt_status_disabled(void *fdt, int nodeoffset) +{ + return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_DISABLED, 0); +} +static inline int fdt_status_fail(void *fdt, int nodeoffset) +{ + return fdt_set_node_status(fdt, nodeoffset, FDT_STATUS_FAIL, 0); +} + +int fdt_set_status_by_alias(void *fdt, const char *alias, + enum fdt_status status, unsigned int error_code); +static inline int fdt_status_okay_by_alias(void *fdt, const char *alias) +{ + return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_OKAY, 0); +} +static inline int fdt_status_disabled_by_alias(void *fdt, const char *alias) +{ + return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_DISABLED, 0); +} +static inline int fdt_status_fail_by_alias(void *fdt, const char *alias) +{ + return fdt_set_status_by_alias(fdt, alias, FDT_STATUS_FAIL, 0); +} + +/* Helper to read a big number; size is in cells (not bytes) */ +static inline u64 fdt_read_number(const fdt32_t *cell, int size) +{ + u64 r = 0; + while (size--) + r = (r << 32) | fdt32_to_cpu(*(cell++)); + return r; +} + +void fdt_support_default_count_cells(const void *blob, int parentoffset, + int *addrc, int *sizec); +int ft_verify_fdt(void *fdt); +int arch_fixup_memory_node(void *blob); + +int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width, + u32 height, u32 stride, const char *format); + +int fdt_overlay_apply_verbose(void *fdt, void *fdto); + +/** + * fdt_get_cells_len() - Get the length of a type of cell in top-level nodes + * + * Returns the length of the cell type in bytes (4 or 8). + * + * @blob: Pointer to device tree blob + * @nr_cells_name: Name to lookup, e.g. "#address-cells" + */ +int fdt_get_cells_len(const void *blob, char *nr_cells_name); + +#endif /* ifdef CONFIG_OF_LIBFDT */ + +#ifdef USE_HOSTCC +int fdtdec_get_int(const void *blob, int node, const char *prop_name, + int default_val); +#endif +#ifdef CONFIG_FMAN_ENET +int fdt_update_ethernet_dt(void *blob); +#endif +#ifdef CONFIG_FSL_MC_ENET +void fdt_fixup_board_enet(void *blob); +#endif +#endif /* ifndef __FDT_SUPPORT_H */ |