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 */
of_io_request_and_map(struct device_node * device,int index,const char * name)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
of_translate_address(struct device_node * np,const __be32 * addr)77 static inline u64 of_translate_address(struct device_node *np,
78 const __be32 *addr)
79 {
80 return OF_BAD_ADDR;
81 }
82
__of_get_address(struct device_node * dev,int index,int bar_no,u64 * size,unsigned int * flags)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
of_pci_range_parser_init(struct of_pci_range_parser * parser,struct device_node * node)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
of_pci_dma_range_parser_init(struct of_pci_range_parser * parser,struct device_node * node)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
of_pci_range_parser_one(struct of_pci_range_parser * parser,struct of_pci_range * range)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
of_pci_address_to_resource(struct device_node * dev,int bar,struct resource * r)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
of_pci_range_to_resource(struct of_pci_range * range,struct device_node * np,struct resource * res)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
of_dma_is_coherent(struct device_node * np)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
of_address_to_resource(struct device_node * dev,int index,struct resource * r)132 static inline int of_address_to_resource(struct device_node *dev, int index,
133 struct resource *r)
134 {
135 return -EINVAL;
136 }
137
of_iomap(struct device_node * device,int index)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
of_get_address(struct device_node * dev,int index,u64 * size,unsigned int * flags)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
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, 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