Linux kernel mirror (for testing)
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linux
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 */