release/src-rt-6.x.4708/linux/linux-2.6.36/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/ioport.h>
   9 #include <linux/of.h>
  10
  11 /*
  12  * irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
  13  * implements it differently.  However, the prototype is the same for all,
  14  * so declare it here regardless of the CONFIG_OF_IRQ setting.
  15  */
  16 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
  17
  18 #if defined(CONFIG_OF_IRQ)
  19 /**
  20  * of_irq - container for device_node/irq_specifier pair for an irq controller
  21  * @controller: pointer to interrupt controller device tree node
  22  * @size: size of interrupt specifier
  23  * @specifier: array of cells @size long specifing the specific interrupt
  24  *
  25  * This structure is returned when an interrupt is mapped. The controller
  26  * field needs to be put() after use
  27  */
  28 #define OF_MAX_IRQ_SPEC         4 /* We handle specifiers of at most 4 cells */
  29 struct of_irq {
  30         struct device_node *controller; /* Interrupt controller node */
  31         u32 size; /* Specifier size */
  32         u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
  33 };
  34
  35 /*
  36  * Workarounds only applied to 32bit powermac machines
  37  */
  38 #define OF_IMAP_OLDWORLD_MAC    0x00000001
  39 #define OF_IMAP_NO_PHANDLE      0x00000002
  40
  41 #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
  42 extern unsigned int of_irq_workarounds;
  43 extern struct device_node *of_irq_dflt_pic;
  44 extern int of_irq_map_oldworld(struct device_node *device, int index,
  45                                struct of_irq *out_irq);
  46 #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  47 #define of_irq_workarounds (0)
  48 #define of_irq_dflt_pic (NULL)
  49 static inline int of_irq_map_oldworld(struct device_node *device, int index,
  50                                       struct of_irq *out_irq)
  51 {
  52         return -EINVAL;
  53 }
  54 #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  55
  56
  57 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
  58                           u32 ointsize, const u32 *addr,
  59                           struct of_irq *out_irq);
  60 extern int of_irq_map_one(struct device_node *device, int index,
  61                           struct of_irq *out_irq);
  62 extern unsigned int irq_create_of_mapping(struct device_node *controller,
  63                                           const u32 *intspec,
  64                                           unsigned int intsize);
  65 extern int of_irq_to_resource(struct device_node *dev, int index,
  66                               struct resource *r);
  67
  68 #endif /* CONFIG_OF_IRQ */
  69 #endif /* CONFIG_OF */
  70 #endif /* __OF_IRQ_H */