of_address.h 4.2 KB

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  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. struct of_bus;
  9. struct of_pci_range_parser {
  10. struct device_node *node;
  11. struct of_bus *bus;
  12. const __be32 *range;
  13. const __be32 *end;
  14. int na;
  15. int ns;
  16. int pna;
  17. bool dma;
  18. };
  19. #define of_range_parser of_pci_range_parser
  20. struct of_pci_range {
  21. union {
  22. u64 pci_addr;
  23. u64 bus_addr;
  24. };
  25. u64 cpu_addr;
  26. u64 size;
  27. u32 flags;
  28. };
  29. #define of_range of_pci_range
  30. #define for_each_of_pci_range(parser, range) \
  31. for (; of_pci_range_parser_one(parser, range);)
  32. #define for_each_of_range for_each_of_pci_range
  33. /* Translate a DMA address from device space to CPU space */
  34. extern u64 of_translate_dma_address(struct device_node *dev,
  35. const __be32 *in_addr);
  36. #ifdef CONFIG_OF_ADDRESS
  37. extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
  38. extern int of_address_to_resource(struct device_node *dev, int index,
  39. struct resource *r);
  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. /* Extract an address from a device, returns the region size and
  44. * the address space flags too. The PCI version uses a BAR number
  45. * instead of an absolute index
  46. */
  47. extern const __be32 *of_get_address(struct device_node *dev, int index,
  48. u64 *size, unsigned int *flags);
  49. extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  50. struct device_node *node);
  51. extern int of_pci_dma_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 bool of_dma_is_coherent(struct device_node *np);
  57. #else /* CONFIG_OF_ADDRESS */
  58. static inline void __iomem *of_io_request_and_map(struct device_node *device,
  59. int index, const char *name)
  60. {
  61. return IOMEM_ERR_PTR(-EINVAL);
  62. }
  63. static inline u64 of_translate_address(struct device_node *np,
  64. const __be32 *addr)
  65. {
  66. return OF_BAD_ADDR;
  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. static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  74. struct device_node *node)
  75. {
  76. return -ENOSYS;
  77. }
  78. static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
  79. struct device_node *node)
  80. {
  81. return -ENOSYS;
  82. }
  83. static inline struct of_pci_range *of_pci_range_parser_one(
  84. struct of_pci_range_parser *parser,
  85. struct of_pci_range *range)
  86. {
  87. return NULL;
  88. }
  89. static inline bool of_dma_is_coherent(struct device_node *np)
  90. {
  91. return false;
  92. }
  93. #endif /* CONFIG_OF_ADDRESS */
  94. #ifdef CONFIG_OF
  95. extern int of_address_to_resource(struct device_node *dev, int index,
  96. struct resource *r);
  97. void __iomem *of_iomap(struct device_node *node, int index);
  98. #else
  99. static inline int of_address_to_resource(struct device_node *dev, int index,
  100. struct resource *r)
  101. {
  102. return -EINVAL;
  103. }
  104. static inline void __iomem *of_iomap(struct device_node *device, int index)
  105. {
  106. return NULL;
  107. }
  108. #endif
  109. #define of_range_parser_init of_pci_range_parser_init
  110. #if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)
  111. extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
  112. u64 *size, unsigned int *flags);
  113. extern int of_pci_address_to_resource(struct device_node *dev, int bar,
  114. struct resource *r);
  115. extern int of_pci_range_to_resource(struct of_pci_range *range,
  116. struct device_node *np,
  117. struct resource *res);
  118. #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */
  119. static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
  120. struct resource *r)
  121. {
  122. return -ENOSYS;
  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. static inline int of_pci_range_to_resource(struct of_pci_range *range,
  130. struct device_node *np,
  131. struct resource *res)
  132. {
  133. return -ENOSYS;
  134. }
  135. #endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */
  136. #endif /* __OF_ADDRESS_H */