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Linux/include/linux/of_irq.h

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

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