Linux kernel mirror (for testing)
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1#ifndef __OF_IRQ_H
2#define __OF_IRQ_H
3
4#if defined(CONFIG_OF)
5struct 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 */
17extern 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 */
30struct 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
36typedef 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)
45extern unsigned int of_irq_workarounds;
46extern struct device_node *of_irq_dflt_pic;
47extern 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)
52static 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
60extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
61 u32 ointsize, const u32 *addr,
62 struct of_irq *out_irq);
63extern int of_irq_map_one(struct device_node *device, int index,
64 struct of_irq *out_irq);
65extern unsigned int irq_create_of_mapping(struct device_node *controller,
66 const u32 *intspec,
67 unsigned int intsize);
68#ifdef CONFIG_IRQ_DOMAIN
69extern void irq_dispose_mapping(unsigned int irq);
70#endif
71extern int of_irq_to_resource(struct device_node *dev, int index,
72 struct resource *r);
73extern int of_irq_count(struct device_node *dev);
74extern int of_irq_to_resource_table(struct device_node *dev,
75 struct resource *res, int nr_irqs);
76extern struct device_node *of_irq_find_parent(struct device_node *child);
77
78extern 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 */