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 struct of_pci_range *of_pci_range_parser_one( 54 struct of_pci_range_parser *parser, 55 struct of_pci_range *range); 56 extern int of_dma_get_range(struct device_node *np, u64 *dma_addr, 57 u64 *paddr, u64 *size); 58 extern bool of_dma_is_coherent(struct device_node *np); 59 #else /* CONFIG_OF_ADDRESS */ 60 static inline void __iomem *of_io_request_and_map(struct device_node *device, 61 int index, const char *name) 62 { 63 return IOMEM_ERR_PTR(-EINVAL); 64 } 65 66 static inline u64 of_translate_address(struct device_node *np, 67 const __be32 *addr) 68 { 69 return OF_BAD_ADDR; 70 } 71 72 static inline struct device_node *of_find_matching_node_by_address( 73 struct device_node *from, 74 const struct of_device_id *matches, 75 u64 base_address) 76 { 77 return NULL; 78 } 79 80 static inline const __be32 *of_get_address(struct device_node *dev, int index, 81 u64 *size, unsigned int *flags) 82 { 83 return NULL; 84 } 85 86 static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser, 87 struct device_node *node) 88 { 89 return -1; 90 } 91 92 static inline struct of_pci_range *of_pci_range_parser_one( 93 struct of_pci_range_parser *parser, 94 struct of_pci_range *range) 95 { 96 return NULL; 97 } 98 99 static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr, 100 u64 *paddr, u64 *size) 101 { 102 return -ENODEV; 103 } 104 105 static inline bool of_dma_is_coherent(struct device_node *np) 106 { 107 return false; 108 } 109 #endif /* CONFIG_OF_ADDRESS */ 110 111 #ifdef CONFIG_OF 112 extern int of_address_to_resource(struct device_node *dev, int index, 113 struct resource *r); 114 void __iomem *of_iomap(struct device_node *node, int index); 115 #else 116 static inline int of_address_to_resource(struct device_node *dev, int index, 117 struct resource *r) 118 { 119 return -EINVAL; 120 } 121 122 static inline void __iomem *of_iomap(struct device_node *device, int index) 123 { 124 return NULL; 125 } 126 #endif 127 128 #if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI) 129 extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, 130 u64 *size, unsigned int *flags); 131 extern int of_pci_address_to_resource(struct device_node *dev, int bar, 132 struct resource *r); 133 extern int of_pci_range_to_resource(struct of_pci_range *range, 134 struct device_node *np, 135 struct resource *res); 136 #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */ 137 static inline int of_pci_address_to_resource(struct device_node *dev, int bar, 138 struct resource *r) 139 { 140 return -ENOSYS; 141 } 142 143 static inline const __be32 *of_get_pci_address(struct device_node *dev, 144 int bar_no, u64 *size, unsigned int *flags) 145 { 146 return NULL; 147 } 148 static inline int of_pci_range_to_resource(struct of_pci_range *range, 149 struct device_node *np, 150 struct resource *res) 151 { 152 return -ENOSYS; 153 } 154 #endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */ 155 156 #endif /* __OF_ADDRESS_H */ 157 158