include/linux/of_irq.h

   1 #ifndef __OF_IRQ_H
   2 #define __OF_IRQ_H
   3
   4 #if defined(CONFIG_OF)
   5 struct of_irq;
   6 #include <linux/types.h>
   7 #include <linux/errno.h>
   8 #include <linux/irq.h>
   9 #include <linux/ioport.h>
  10 #include <linux/of.h>
  11
  12 /*
  13  * irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
  14  * implements it differently.  However, the prototype is the same for all,
  15  * so declare it here regardless of the CONFIG_OF_IRQ setting.
  16  */
  17 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
  18
  19 #if defined(CONFIG_OF_IRQ)
  20 /**
  21  * of_irq - container for device_node/irq_specifier pair for an irq controller
  22  * @controller: pointer to interrupt controller device tree node
  23  * @size: size of interrupt specifier
  24  * @specifier: array of cells @size long specifing the specific interrupt
  25  *
  26  * This structure is returned when an interrupt is mapped. The controller
  27  * field needs to be put() after use
  28  */
  29 #define OF_MAX_IRQ_SPEC         4 /* We handle specifiers of at most 4 cells */
  30 struct of_irq {
  31         struct device_node *controller; /* Interrupt controller node */
  32         u32 size; /* Specifier size */
  33         u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
  34 };
  35
  36 typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
  37
  38 /*
  39  * Workarounds only applied to 32bit powermac machines
  40  */
  41 #define OF_IMAP_OLDWORLD_MAC    0x00000001
  42 #define OF_IMAP_NO_PHANDLE      0x00000002
  43
  44 #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
  45 extern unsigned int of_irq_workarounds;
  46 extern struct device_node *of_irq_dflt_pic;
  47 extern int of_irq_map_oldworld(struct device_node *device, int index,
  48                                struct of_irq *out_irq);
  49 #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  50 #define of_irq_workarounds (0)
  51 #define of_irq_dflt_pic (NULL)
  52 static inline int of_irq_map_oldworld(struct device_node *device, int index,
  53                                       struct of_irq *out_irq)
  54 {
  55         return -EINVAL;
  56 }
  57 #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  58
  59
  60 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
  61                           u32 ointsize, const u32 *addr,
  62                           struct of_irq *out_irq);
  63 extern int of_irq_map_one(struct device_node *device, int index,
  64                           struct of_irq *out_irq);
  65 extern unsigned int irq_create_of_mapping(struct device_node *controller,
  66                                           const u32 *intspec,
  67                                           unsigned int intsize);
  68 #ifdef CONFIG_IRQ_DOMAIN
  69 extern void irq_dispose_mapping(unsigned int irq);
  70 #endif
  71 extern int of_irq_to_resource(struct device_node *dev, int index,
  72                               struct resource *r);
  73 extern int of_irq_count(struct device_node *dev);
  74 extern int of_irq_to_resource_table(struct device_node *dev,
  75                 struct resource *res, int nr_irqs);
  76 extern struct device_node *of_irq_find_parent(struct device_node *child);
  77
  78 extern void of_irq_init(const struct of_device_id *matches);
  79
  80 #endif /* CONFIG_OF_IRQ */
  81 #endif /* CONFIG_OF */
  82 #endif /* __OF_IRQ_H */