1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __OF_ADDRESS_H 3 #define __OF_ADDRESS_H 4 #include <linux/ioport.h> 5 #include <linux/errno.h> 6 #include <linux/of.h> 7 #include <linux/io.h> 8 9 struct of_pci_range_parser { 10 struct device_node *node; 11 const __be32 *range; 12 const __be32 *end; 13 int np; 14 int pna; 15 }; 16 17 struct of_pci_range { 18 u32 pci_space; 19 u64 pci_addr; 20 u64 cpu_addr; 21 u64 size; 22 u32 flags; 23 }; 24 25 #define for_each_of_pci_range(parser, range) \ 26 for (; of_pci_range_parser_one(parser, range);) 27 28 /* Translate a DMA address from device space to CPU space */ 29 extern u64 of_translate_dma_address(struct device_node *dev, 30 const __be32 *in_addr); 31 32 #ifdef CONFIG_OF_ADDRESS 33 extern u64 of_translate_address(struct device_node *np, const __be32 *addr); 34 extern int of_address_to_resource(struct device_node *dev, int index, 35 struct resource *r); 36 extern struct device_node *of_find_matching_node_by_address( 37 struct device_node *from, 38 const struct of_device_id *matches, 39 u64 base_address); 40 extern void __iomem *of_iomap(struct device_node *device, int index); 41 void __iomem *of_io_request_and_map(struct device_node *device, 42 int index, const char *name); 43 44 /* Extract an address from a device, returns the region size and 45 * the address space flags too. The PCI version uses a BAR number 46 * instead of an absolute index 47 */ 48 extern const __be32 *of_get_address(struct device_node *dev, int index, 49 u64 *size, unsigned int *flags); 50 51 extern int of_pci_range_parser_init(struct of_pci_range_parser *parser, 52 struct device_node *node); 53 extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser, 54 struct device_node *node); 55 extern struct of_pci_range *of_pci_range_parser_one( 56 struct of_pci_range_parser *parser, 57 struct of_pci_range *range); 58 extern int of_dma_get_range(struct device_node *np, u64 *dma_addr, 59 u64 *paddr, u64 *size); 60 extern bool of_dma_is_coherent(struct device_node *np); 61 #else /* CONFIG_OF_ADDRESS */ 62 static inline void __iomem *of_io_request_and_map(struct device_node *device, 63 int index, const char *name) 64 { 65 return IOMEM_ERR_PTR(-EINVAL); 66 } 67 68 static inline u64 of_translate_address(struct device_node *np, 69 const __be32 *addr) 70 { 71 return OF_BAD_ADDR; 72 } 73 74 static inline struct device_node *of_find_matching_node_by_address( 75 struct device_node *from, 76 const struct of_device_id *matches, 77 u64 base_address) 78 { 79 return NULL; 80 } 81 82 static inline const __be32 *of_get_address(struct device_node *dev, int index, 83 u64 *size, unsigned int *flags) 84 { 85 return NULL; 86 } 87 88 static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser, 89 struct device_node *node) 90 { 91 return -ENOSYS; 92 } 93 94 static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser, 95 struct device_node *node) 96 { 97 return -ENOSYS; 98 } 99 100 static inline struct of_pci_range *of_pci_range_parser_one( 101 struct of_pci_range_parser *parser, 102 struct of_pci_range *range) 103 { 104 return NULL; 105 } 106 107 static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr, 108 u64 *paddr, u64 *size) 109 { 110 return -ENODEV; 111 } 112 113 static inline bool of_dma_is_coherent(struct device_node *np) 114 { 115 return false; 116 } 117 #endif /* CONFIG_OF_ADDRESS */ 118 119 #ifdef CONFIG_OF 120 extern int of_address_to_resource(struct device_node *dev, int index, 121 struct resource *r); 122 void __iomem *of_iomap(struct device_node *node, int index); 123 #else 124 static inline int of_address_to_resource(struct device_node *dev, int index, 125 struct resource *r) 126 { 127 return -EINVAL; 128 } 129 130 static inline void __iomem *of_iomap(struct device_node *device, int index) 131 { 132 return NULL; 133 } 134 #endif 135 136 #if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI) 137 extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, 138 u64 *size, unsigned int *flags); 139 extern int of_pci_address_to_resource(struct device_node *dev, int bar, 140 struct resource *r); 141 extern int of_pci_range_to_resource(struct of_pci_range *range, 142 struct device_node *np, 143 struct resource *res); 144 #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */ 145 static inline int of_pci_address_to_resource(struct device_node *dev, int bar, 146 struct resource *r) 147 { 148 return -ENOSYS; 149 } 150 151 static inline const __be32 *of_get_pci_address(struct device_node *dev, 152 int bar_no, u64 *size, unsigned int *flags) 153 { 154 return NULL; 155 } 156 static inline int of_pci_range_to_resource(struct of_pci_range *range, 157 struct device_node *np, 158 struct resource *res) 159 { 160 return -ENOSYS; 161 } 162 #endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */ 163 164 #endif /* __OF_ADDRESS_H */ 165 166