LXR linux/include/linux/of

   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/**
  12 * of_irq - container for device_node/irq_specifier pair for an irq controller
  13 * @controller: pointer to interrupt controller device tree node
  14 * @size: size of interrupt specifier
  15 * @specifier: array of cells @size long specifing the specific interrupt
  16 *
  17 * This structure is returned when an interrupt is mapped. The controller
  18 * field needs to be put() after use
  19 */
  20#define OF_MAX_IRQ_SPEC         4 /* We handle specifiers of at most 4 cells */
  21struct of_irq {
  22        struct device_node *controller; /* Interrupt controller node */
  23        u32 size; /* Specifier size */
  24        u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
  25};
  26
  27typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
  28
  29/*
  30 * Workarounds only applied to 32bit powermac machines
  31 */
  32#define OF_IMAP_OLDWORLD_MAC    0x00000001
  33#define OF_IMAP_NO_PHANDLE      0x00000002
  34
  35#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
  36extern unsigned int of_irq_workarounds;
  37extern struct device_node *of_irq_dflt_pic;
  38extern int of_irq_map_oldworld(struct device_node *device, int index,
  39                               struct of_irq *out_irq);
  40#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  41#define of_irq_workarounds (0)
  42#define of_irq_dflt_pic (NULL)
  43static inline int of_irq_map_oldworld(struct device_node *device, int index,
  44                                      struct of_irq *out_irq)
  45{
  46        return -EINVAL;
  47}
  48#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  49
  50
  51extern int of_irq_map_raw(struct device_node *parent, const __be32 *intspec,
  52                          u32 ointsize, const __be32 *addr,
  53                          struct of_irq *out_irq);
  54extern int of_irq_map_one(struct device_node *device, int index,
  55                          struct of_irq *out_irq);
  56extern unsigned int irq_create_of_mapping(struct device_node *controller,
  57                                          const u32 *intspec,
  58                                          unsigned int intsize);
  59extern int of_irq_to_resource(struct device_node *dev, int index,
  60                              struct resource *r);
  61extern int of_irq_count(struct device_node *dev);
  62extern int of_irq_to_resource_table(struct device_node *dev,
  63                struct resource *res, int nr_irqs);
  64
  65extern void of_irq_init(const struct of_device_id *matches);
  66
  67#if defined(CONFIG_OF)
  68/*
  69 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
  70 * implements it differently.  However, the prototype is the same for all,
  71 * so declare it here regardless of the CONFIG_OF_IRQ setting.
  72 */
  73extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
  74extern struct device_node *of_irq_find_parent(struct device_node *child);
  75
  76#else /* !CONFIG_OF */
  77static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
  78                                                int index)
  79{
  80        return 0;
  81}
  82
  83static inline void *of_irq_find_parent(struct device_node *child)
  84{
  85        return NULL;
  86}
  87#endif /* !CONFIG_OF */
  88
  89#endif /* __OF_IRQ_H */
  90