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 static inline void of_pci_range_to_resource(struct of_pci_range *range,
  27                                             struct device_node *np,
  28                                             struct resource *res)
  29 {
  30         res->flags = range->flags;
  31         res->start = range->cpu_addr;
  32         res->end = range->cpu_addr + range->size - 1;
  33         res->parent = res->child = res->sibling = NULL;
  34         res->name = np->full_name;
  35 }
  36
  37 /* Translate a DMA address from device space to CPU space */
  38 extern u64 of_translate_dma_address(struct device_node *dev,
  39                                     const __be32 *in_addr);
  40
  41 #ifdef CONFIG_OF_ADDRESS
  42 extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
  43 extern bool of_can_translate_address(struct device_node *dev);
  44 extern int of_address_to_resource(struct device_node *dev, int index,
  45                                   struct resource *r);
  46 extern struct device_node *of_find_matching_node_by_address(
  47                                         struct device_node *from,
  48                                         const struct of_device_id *matches,
  49                                         u64 base_address);
  50 extern void __iomem *of_iomap(struct device_node *device, int index);
  51
  52 /* Extract an address from a device, returns the region size and
  53  * the address space flags too. The PCI version uses a BAR number
  54  * instead of an absolute index
  55  */
  56 extern const __be32 *of_get_address(struct device_node *dev, int index,
  57                            u64 *size, unsigned int *flags);
  58
  59 extern unsigned long pci_address_to_pio(phys_addr_t addr);
  60
  61 extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  62                         struct device_node *node);
  63 extern struct of_pci_range *of_pci_range_parser_one(
  64                                         struct of_pci_range_parser *parser,
  65                                         struct of_pci_range *range);
  66 #else /* CONFIG_OF_ADDRESS */
  67 static inline struct device_node *of_find_matching_node_by_address(
  68                                         struct device_node *from,
  69                                         const struct of_device_id *matches,
  70                                         u64 base_address)
  71 {
  72         return NULL;
  73 }
  74
  75 static inline const __be32 *of_get_address(struct device_node *dev, int index,
  76                                         u64 *size, unsigned int *flags)
  77 {
  78         return NULL;
  79 }
  80
  81 static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  82                         struct device_node *node)
  83 {
  84         return -1;
  85 }
  86
  87 static inline struct of_pci_range *of_pci_range_parser_one(
  88                                         struct of_pci_range_parser *parser,
  89                                         struct of_pci_range *range)
  90 {
  91         return NULL;
  92 }
  93 #endif /* CONFIG_OF_ADDRESS */
  94
  95 #ifdef CONFIG_OF
  96 extern int of_address_to_resource(struct device_node *dev, int index,
  97                                   struct resource *r);
  98 void __iomem *of_iomap(struct device_node *node, int index);
  99 #else
 100 static inline int of_address_to_resource(struct device_node *dev, int index,
 101                                          struct resource *r)
 102 {
 103         return -EINVAL;
 104 }
 105
 106 static inline void __iomem *of_iomap(struct device_node *device, int index)
 107 {
 108         return NULL;
 109 }
 110 #endif
 111
 112 #if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)
 113 extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
 114                                u64 *size, unsigned int *flags);
 115 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
 116                                       struct resource *r);
 117 #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 118 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
 119                                              struct resource *r)
 120 {
 121         return -ENOSYS;
 122 }
 123
 124 static inline const __be32 *of_get_pci_address(struct device_node *dev,
 125                 int bar_no, u64 *size, unsigned int *flags)
 126 {
 127         return NULL;
 128 }
 129 #endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 130
 131 #endif /* __OF_ADDRESS_H */
 132