include/linux/of_address.h

   1 #ifndef __OF_ADDRESS_H
   2 #define __OF_ADDRESS_H
   3 #include <linux/ioport.h>
   4 #include <linux/errno.h>
   5 #include <linux/of.h>
   6
   7 struct of_pci_range_parser {
   8         struct device_node *node;
   9         const __be32 *range;
  10         const __be32 *end;
  11         int np;
  12         int pna;
  13 };
  14
  15 struct of_pci_range {
  16         u32 pci_space;
  17         u64 pci_addr;
  18         u64 cpu_addr;
  19         u64 size;
  20         u32 flags;
  21 };
  22
  23 #define for_each_of_pci_range(parser, range) \
  24         for (; of_pci_range_parser_one(parser, range);)
  25
  26 /* Translate a DMA address from device space to CPU space */
  27 extern u64 of_translate_dma_address(struct device_node *dev,
  28                                     const __be32 *in_addr);
  29
  30 #ifdef CONFIG_OF_ADDRESS
  31 extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
  32 extern int of_address_to_resource(struct device_node *dev, int index,
  33                                   struct resource *r);
  34 extern struct device_node *of_find_matching_node_by_address(
  35                                         struct device_node *from,
  36                                         const struct of_device_id *matches,
  37                                         u64 base_address);
  38 extern void __iomem *of_iomap(struct device_node *device, int index);
  39
  40 /* Extract an address from a device, returns the region size and
  41  * the address space flags too. The PCI version uses a BAR number
  42  * instead of an absolute index
  43  */
  44 extern const __be32 *of_get_address(struct device_node *dev, int index,
  45                            u64 *size, unsigned int *flags);
  46
  47 extern int pci_register_io_range(phys_addr_t addr, resource_size_t size);
  48 extern unsigned long pci_address_to_pio(phys_addr_t addr);
  49 extern phys_addr_t pci_pio_to_address(unsigned long pio);
  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 struct device_node *of_find_matching_node_by_address(
  61                                         struct device_node *from,
  62                                         const struct of_device_id *matches,
  63                                         u64 base_address)
  64 {
  65         return NULL;
  66 }
  67
  68 static inline const __be32 *of_get_address(struct device_node *dev, int index,
  69                                         u64 *size, unsigned int *flags)
  70 {
  71         return NULL;
  72 }
  73
  74 static inline phys_addr_t pci_pio_to_address(unsigned long pio)
  75 {
  76         return 0;
  77 }
  78
  79 static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  80                         struct device_node *node)
  81 {
  82         return -1;
  83 }
  84
  85 static inline struct of_pci_range *of_pci_range_parser_one(
  86                                         struct of_pci_range_parser *parser,
  87                                         struct of_pci_range *range)
  88 {
  89         return NULL;
  90 }
  91
  92 static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr,
  93                                 u64 *paddr, u64 *size)
  94 {
  95         return -ENODEV;
  96 }
  97
  98 static inline bool of_dma_is_coherent(struct device_node *np)
  99 {
 100         return false;
 101 }
 102 #endif /* CONFIG_OF_ADDRESS */
 103
 104 #ifdef CONFIG_OF
 105 extern int of_address_to_resource(struct device_node *dev, int index,
 106                                   struct resource *r);
 107 void __iomem *of_iomap(struct device_node *node, int index);
 108 void __iomem *of_io_request_and_map(struct device_node *device,
 109                                         int index, const char *name);
 110 #else
 111
 112 #include <linux/io.h>
 113
 114 static inline int of_address_to_resource(struct device_node *dev, int index,
 115                                          struct resource *r)
 116 {
 117         return -EINVAL;
 118 }
 119
 120 static inline void __iomem *of_iomap(struct device_node *device, int index)
 121 {
 122         return NULL;
 123 }
 124
 125 static inline void __iomem *of_io_request_and_map(struct device_node *device,
 126                                         int index, const char *name)
 127 {
 128         return IOMEM_ERR_PTR(-EINVAL);
 129 }
 130 #endif
 131
 132 #if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)
 133 extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
 134                                u64 *size, unsigned int *flags);
 135 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
 136                                       struct resource *r);
 137 extern int of_pci_range_to_resource(struct of_pci_range *range,
 138                                     struct device_node *np,
 139                                     struct resource *res);
 140 #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 141 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
 142                                              struct resource *r)
 143 {
 144         return -ENOSYS;
 145 }
 146
 147 static inline const __be32 *of_get_pci_address(struct device_node *dev,
 148                 int bar_no, u64 *size, unsigned int *flags)
 149 {
 150         return NULL;
 151 }
 152 static inline int of_pci_range_to_resource(struct of_pci_range *range,
 153                                            struct device_node *np,
 154                                            struct resource *res)
 155 {
 156         return -ENOSYS;
 157 }
 158 #endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 159
 160 #endif /* __OF_ADDRESS_H */
 161