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-rw-r--r--include/linux/of_irq.h70
1 files changed, 70 insertions, 0 deletions
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
new file mode 100644
index 000000000000..5929781c104d
--- /dev/null
+++ b/include/linux/of_irq.h
@@ -0,0 +1,70 @@
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/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 */
16extern 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 */
29struct 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)
42extern unsigned int of_irq_workarounds;
43extern struct device_node *of_irq_dflt_pic;
44extern 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)
49static 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
57extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
58 u32 ointsize, const u32 *addr,
59 struct of_irq *out_irq);
60extern int of_irq_map_one(struct device_node *device, int index,
61 struct of_irq *out_irq);
62extern unsigned int irq_create_of_mapping(struct device_node *controller,
63 const u32 *intspec,
64 unsigned int intsize);
65extern 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 */