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 int of_address_to_resource(struct device_node *dev, int index,
  44                                   struct resource *r);
  45 extern struct device_node *of_find_matching_node_by_address(
  46                                         struct device_node *from,
  47                                         const struct of_device_id *matches,
  48                                         u64 base_address);
  49 extern void __iomem *of_iomap(struct device_node *device, int index);
  50
  51 /* Extract an address from a device, returns the region size and
  52  * the address space flags too. The PCI version uses a BAR number
  53  * instead of an absolute index
  54  */
  55 extern const __be32 *of_get_address(struct device_node *dev, int index,
  56                            u64 *size, unsigned int *flags);
  57
  58 extern unsigned long pci_address_to_pio(phys_addr_t addr);
  59
  60 extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  61                         struct device_node *node);
  62 extern struct of_pci_range *of_pci_range_parser_one(
  63                                         struct of_pci_range_parser *parser,
  64                                         struct of_pci_range *range);
  65 extern int of_dma_get_range(struct device_node *np, u64 *dma_addr,
  66                                 u64 *paddr, u64 *size);
  67 extern bool of_dma_is_coherent(struct device_node *np);
  68 #else /* CONFIG_OF_ADDRESS */
  69 static inline struct device_node *of_find_matching_node_by_address(
  70                                         struct device_node *from,
  71                                         const struct of_device_id *matches,
  72                                         u64 base_address)
  73 {
  74         return NULL;
  75 }
  76
  77 static inline const __be32 *of_get_address(struct device_node *dev, int index,
  78                                         u64 *size, unsigned int *flags)
  79 {
  80         return NULL;
  81 }
  82
  83 static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  84                         struct device_node *node)
  85 {
  86         return -1;
  87 }
  88
  89 static inline struct of_pci_range *of_pci_range_parser_one(
  90                                         struct of_pci_range_parser *parser,
  91                                         struct of_pci_range *range)
  92 {
  93         return NULL;
  94 }
  95
  96 static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr,
  97                                 u64 *paddr, u64 *size)
  98 {
  99         return -ENODEV;
 100 }
 101
 102 static inline bool of_dma_is_coherent(struct device_node *np)
 103 {
 104         return false;
 105 }
 106 #endif /* CONFIG_OF_ADDRESS */
 107
 108 #ifdef CONFIG_OF
 109 extern int of_address_to_resource(struct device_node *dev, int index,
 110                                   struct resource *r);
 111 void __iomem *of_iomap(struct device_node *node, int index);
 112 void __iomem *of_io_request_and_map(struct device_node *device,
 113                                         int index, char *name);
 114 #else
 115
 116 #include <linux/io.h>
 117
 118 static inline int of_address_to_resource(struct device_node *dev, int index,
 119                                          struct resource *r)
 120 {
 121         return -EINVAL;
 122 }
 123
 124 static inline void __iomem *of_iomap(struct device_node *device, int index)
 125 {
 126         return NULL;
 127 }
 128
 129 static inline void __iomem *of_io_request_and_map(struct device_node *device,
 130                                         int index, char *name)
 131 {
 132         return IOMEM_ERR_PTR(-EINVAL);
 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 #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 142 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
 143                                              struct resource *r)
 144 {
 145         return -ENOSYS;
 146 }
 147
 148 static inline const __be32 *of_get_pci_address(struct device_node *dev,
 149                 int bar_no, u64 *size, unsigned int *flags)
 150 {
 151         return NULL;
 152 }
 153 #endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 154
 155 #endif /* __OF_ADDRESS_H */
 156