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Linux/include/linux/of_irq.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef __OF_IRQ_H
  3 #define __OF_IRQ_H
  4 
  5 #include <linux/types.h>
  6 #include <linux/errno.h>
  7 #include <linux/irq.h>
  8 #include <linux/irqdomain.h>
  9 #include <linux/ioport.h>
 10 #include <linux/of.h>
 11 
 12 typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
 13 
 14 /*
 15  * Workarounds only applied to 32bit powermac machines
 16  */
 17 #define OF_IMAP_OLDWORLD_MAC    0x00000001
 18 #define OF_IMAP_NO_PHANDLE      0x00000002
 19 
 20 #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
 21 extern unsigned int of_irq_workarounds;
 22 extern struct device_node *of_irq_dflt_pic;
 23 extern int of_irq_parse_oldworld(struct device_node *device, int index,
 24                                struct of_phandle_args *out_irq);
 25 #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
 26 #define of_irq_workarounds (0)
 27 #define of_irq_dflt_pic (NULL)
 28 static inline int of_irq_parse_oldworld(struct device_node *device, int index,
 29                                       struct of_phandle_args *out_irq)
 30 {
 31         return -EINVAL;
 32 }
 33 #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
 34 
 35 extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
 36 extern int of_irq_parse_one(struct device_node *device, int index,
 37                           struct of_phandle_args *out_irq);
 38 extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
 39 extern int of_irq_to_resource(struct device_node *dev, int index,
 40                               struct resource *r);
 41 
 42 extern void of_irq_init(const struct of_device_id *matches);
 43 
 44 #ifdef CONFIG_OF_IRQ
 45 extern int of_irq_count(struct device_node *dev);
 46 extern int of_irq_get(struct device_node *dev, int index);
 47 extern int of_irq_get_byname(struct device_node *dev, const char *name);
 48 extern int of_irq_to_resource_table(struct device_node *dev,
 49                 struct resource *res, int nr_irqs);
 50 extern struct device_node *of_irq_find_parent(struct device_node *child);
 51 extern struct irq_domain *of_msi_get_domain(struct device *dev,
 52                                             struct device_node *np,
 53                                             enum irq_domain_bus_token token);
 54 extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
 55                                                        u32 rid);
 56 extern void of_msi_configure(struct device *dev, struct device_node *np);
 57 u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in);
 58 #else
 59 static inline int of_irq_count(struct device_node *dev)
 60 {
 61         return 0;
 62 }
 63 static inline int of_irq_get(struct device_node *dev, int index)
 64 {
 65         return 0;
 66 }
 67 static inline int of_irq_get_byname(struct device_node *dev, const char *name)
 68 {
 69         return 0;
 70 }
 71 static inline int of_irq_to_resource_table(struct device_node *dev,
 72                                            struct resource *res, int nr_irqs)
 73 {
 74         return 0;
 75 }
 76 static inline void *of_irq_find_parent(struct device_node *child)
 77 {
 78         return NULL;
 79 }
 80 
 81 static inline struct irq_domain *of_msi_get_domain(struct device *dev,
 82                                                    struct device_node *np,
 83                                                    enum irq_domain_bus_token token)
 84 {
 85         return NULL;
 86 }
 87 static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
 88                                                               u32 rid)
 89 {
 90         return NULL;
 91 }
 92 static inline void of_msi_configure(struct device *dev, struct device_node *np)
 93 {
 94 }
 95 static inline u32 of_msi_map_rid(struct device *dev,
 96                                  struct device_node *msi_np, u32 rid_in)
 97 {
 98         return rid_in;
 99 }
100 #endif
101 
102 #if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
103 /*
104  * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
105  * implements it differently.  However, the prototype is the same for all,
106  * so declare it here regardless of the CONFIG_OF_IRQ setting.
107  */
108 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
109 
110 #else /* !CONFIG_OF && !CONFIG_SPARC */
111 static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
112                                                 int index)
113 {
114         return 0;
115 }
116 #endif /* !CONFIG_OF */
117 
118 #endif /* __OF_IRQ_H */
119 

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