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review.evervolv.com / android_kernel_htc_msm8960 / fe9a0d032a38012de574eed70a98c1385b23a4a1 / . / include / linux / of_irq.h
blob: d229ad3edee0cb423ad052a1a7c7f65117e45e72 [file] [log] [blame]
Grant Likelye3873442010-06-18 11:09:59 -0600[diff] [blame]1#ifndef __OF_IRQ_H
2#define __OF_IRQ_H
3
4#if defined(CONFIG_OF)
5struct of_irq;
6#include <linux/types.h>
Grant Likely7dc2e112010-06-08 07:48:06 -0600[diff] [blame]7#include <linux/errno.h>
Grant Likely530719b2010-10-21 11:34:55 -0600[diff] [blame]8#include <linux/irq.h>
Grant Likelyd593f252012-02-24 08:24:17 -0700[diff] [blame]9#include <linux/irqdomain.h>
Grant Likely7dc2e112010-06-08 07:48:06 -0600[diff] [blame]10#include <linux/ioport.h>
Grant Likelye3873442010-06-18 11:09:59 -0600[diff] [blame]11#include <linux/of.h>
12
13/*
14 * irq_of_parse_and_map() is used ba all OF enabled platforms; but SPARC
15 * implements it differently. However, the prototype is the same for all,
16 * so declare it here regardless of the CONFIG_OF_IRQ setting.
17 */
18extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
19
20#if defined(CONFIG_OF_IRQ)
21/**
22 * of_irq - container for device_node/irq_specifier pair for an irq controller
23 * @controller: pointer to interrupt controller device tree node
24 * @size: size of interrupt specifier
25 * @specifier: array of cells @size long specifing the specific interrupt
26 *
27 * This structure is returned when an interrupt is mapped. The controller
28 * field needs to be put() after use
29 */
30#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
31struct of_irq {
32 struct device_node *controller; /* Interrupt controller node */
33 u32 size; /* Specifier size */
34 u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
35};
36
Rob Herringc71a54b2011-09-20 15:13:50 -0500[diff] [blame]37typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
38
Grant Likely7dc2e112010-06-08 07:48:06 -0600[diff] [blame]39/*
40 * Workarounds only applied to 32bit powermac machines
41 */
42#define OF_IMAP_OLDWORLD_MAC 0x00000001
43#define OF_IMAP_NO_PHANDLE 0x00000002
44
45#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
46extern unsigned int of_irq_workarounds;
47extern struct device_node *of_irq_dflt_pic;
48extern int of_irq_map_oldworld(struct device_node *device, int index,
49 struct of_irq *out_irq);
50#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
51#define of_irq_workarounds (0)
52#define of_irq_dflt_pic (NULL)
53static inline int of_irq_map_oldworld(struct device_node *device, int index,
54 struct of_irq *out_irq)
55{
56 return -EINVAL;
57}
58#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
59
60
61extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
62 u32 ointsize, const u32 *addr,
63 struct of_irq *out_irq);
Grant Likelye3873442010-06-18 11:09:59 -0600[diff] [blame]64extern int of_irq_map_one(struct device_node *device, int index,
65 struct of_irq *out_irq);
66extern unsigned int irq_create_of_mapping(struct device_node *controller,
67 const u32 *intspec,
68 unsigned int intsize);
Grant Likely7dc2e112010-06-08 07:48:06 -0600[diff] [blame]69extern int of_irq_to_resource(struct device_node *dev, int index,
70 struct resource *r);
Andres Salomon52f65372010-10-10 21:35:05 -0600[diff] [blame]71extern int of_irq_count(struct device_node *dev);
72extern int of_irq_to_resource_table(struct device_node *dev,
73 struct resource *res, int nr_irqs);
Michael Ellerman0b2e9a82011-04-14 22:31:57 +0000[diff] [blame]74extern struct device_node *of_irq_find_parent(struct device_node *child);
Grant Likelye3873442010-06-18 11:09:59 -0600[diff] [blame]75
Rob Herringc71a54b2011-09-20 15:13:50 -0500[diff] [blame]76extern void of_irq_init(const struct of_device_id *matches);
Grant Likely08a543a2011-07-26 03:19:06 -0600[diff] [blame]77
Grant Likelye3873442010-06-18 11:09:59 -0600[diff] [blame]78#endif /* CONFIG_OF_IRQ */
79#endif /* CONFIG_OF */
80#endif /* __OF_IRQ_H */