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 */
of_io_request_and_map(struct device_node * device,int index,const char * name)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
of_translate_address(struct device_node * np,const __be32 * addr)68 static inline u64 of_translate_address(struct device_node *np,
69 const __be32 *addr)
70 {
71 return OF_BAD_ADDR;
72 }
73
of_find_matching_node_by_address(struct device_node * from,const struct of_device_id * matches,u64 base_address)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
of_get_address(struct device_node * dev,int index,u64 * size,unsigned int * flags)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
of_pci_range_parser_init(struct of_pci_range_parser * parser,struct device_node * node)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
of_pci_dma_range_parser_init(struct of_pci_range_parser * parser,struct device_node * node)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
of_pci_range_parser_one(struct of_pci_range_parser * parser,struct of_pci_range * range)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
of_dma_get_range(struct device_node * np,u64 * dma_addr,u64 * paddr,u64 * size)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
of_dma_is_coherent(struct device_node * np)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
of_address_to_resource(struct device_node * dev,int index,struct resource * r)124 static inline int of_address_to_resource(struct device_node *dev, int index,
125 struct resource *r)
126 {
127 return -EINVAL;
128 }
129
of_iomap(struct device_node * device,int index)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 */
of_pci_address_to_resource(struct device_node * dev,int bar,struct resource * r)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
of_get_pci_address(struct device_node * dev,int bar_no,u64 * size,unsigned int * flags)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 }
of_pci_range_to_resource(struct of_pci_range * range,struct device_node * np,struct resource * res)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