of_irq.h 3.8 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef __OF_IRQ_H
  3. #define __OF_IRQ_H
  4. #include <linux/types.h>
  5. #include <linux/errno.h>
  6. #include <linux/irq.h>
  7. #include <linux/irqdomain.h>
  8. #include <linux/ioport.h>
  9. #include <linux/of.h>
  10. typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
  11. /*
  12. * Workarounds only applied to 32bit powermac machines
  13. */
  14. #define OF_IMAP_OLDWORLD_MAC 0x00000001
  15. #define OF_IMAP_NO_PHANDLE 0x00000002
  16. #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
  17. extern unsigned int of_irq_workarounds;
  18. extern struct device_node *of_irq_dflt_pic;
  19. extern int of_irq_parse_oldworld(struct device_node *device, int index,
  20. struct of_phandle_args *out_irq);
  21. #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  22. #define of_irq_workarounds (0)
  23. #define of_irq_dflt_pic (NULL)
  24. static inline int of_irq_parse_oldworld(struct device_node *device, int index,
  25. struct of_phandle_args *out_irq)
  26. {
  27. return -EINVAL;
  28. }
  29. #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  30. extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
  31. extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
  32. extern int of_irq_to_resource(struct device_node *dev, int index,
  33. struct resource *r);
  34. extern void of_irq_init(const struct of_device_id *matches);
  35. #ifdef CONFIG_OF_IRQ
  36. extern int of_irq_parse_one(struct device_node *device, int index,
  37. struct of_phandle_args *out_irq);
  38. extern int of_irq_count(struct device_node *dev);
  39. extern int of_irq_get(struct device_node *dev, int index);
  40. extern int of_irq_get_byname(struct device_node *dev, const char *name);
  41. extern int of_irq_to_resource_table(struct device_node *dev,
  42. struct resource *res, int nr_irqs);
  43. extern struct device_node *of_irq_find_parent(struct device_node *child);
  44. extern struct irq_domain *of_msi_get_domain(struct device *dev,
  45. struct device_node *np,
  46. enum irq_domain_bus_token token);
  47. extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
  48. u32 id,
  49. u32 bus_token);
  50. extern void of_msi_configure(struct device *dev, struct device_node *np);
  51. u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
  52. #else
  53. static inline int of_irq_parse_one(struct device_node *device, int index,
  54. struct of_phandle_args *out_irq)
  55. {
  56. return -EINVAL;
  57. }
  58. static inline int of_irq_count(struct device_node *dev)
  59. {
  60. return 0;
  61. }
  62. static inline int of_irq_get(struct device_node *dev, int index)
  63. {
  64. return 0;
  65. }
  66. static inline int of_irq_get_byname(struct device_node *dev, const char *name)
  67. {
  68. return 0;
  69. }
  70. static inline int of_irq_to_resource_table(struct device_node *dev,
  71. struct resource *res, int nr_irqs)
  72. {
  73. return 0;
  74. }
  75. static inline void *of_irq_find_parent(struct device_node *child)
  76. {
  77. return NULL;
  78. }
  79. static inline struct irq_domain *of_msi_get_domain(struct device *dev,
  80. struct device_node *np,
  81. enum irq_domain_bus_token token)
  82. {
  83. return NULL;
  84. }
  85. static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
  86. u32 id, u32 bus_token)
  87. {
  88. return NULL;
  89. }
  90. static inline void of_msi_configure(struct device *dev, struct device_node *np)
  91. {
  92. }
  93. static inline u32 of_msi_map_id(struct device *dev,
  94. struct device_node *msi_np, u32 id_in)
  95. {
  96. return id_in;
  97. }
  98. #endif
  99. #if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
  100. /*
  101. * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
  102. * implements it differently. However, the prototype is the same for all,
  103. * so declare it here regardless of the CONFIG_OF_IRQ setting.
  104. */
  105. extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
  106. #else /* !CONFIG_OF && !CONFIG_SPARC */
  107. static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
  108. int index)
  109. {
  110. return 0;
  111. }
  112. #endif /* !CONFIG_OF */
  113. #endif /* __OF_IRQ_H */