include/linux/of_irq.h

   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 */