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