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/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 */
17 extern 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 */
30 struct 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
36 /*
37 * Workarounds only applied to 32bit powermac machines
38 */
39 #define OF_IMAP_OLDWORLD_MAC 0x00000001
40 #define OF_IMAP_NO_PHANDLE 0x00000002
41
42 #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
43 extern unsigned int of_irq_workarounds;
44 extern struct device_node *of_irq_dflt_pic;
45 extern int of_irq_map_oldworld(struct device_node *device, int index,
46 struct of_irq *out_irq);
47 #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
48 #define of_irq_workarounds (0)
49 #define of_irq_dflt_pic (NULL)
of_irq_map_oldworld(struct device_node * device,int index,struct of_irq * out_irq)50 static inline int of_irq_map_oldworld(struct device_node *device, int index,
51 struct of_irq *out_irq)
52 {
53 return -EINVAL;
54 }
55 #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
56
57
58 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
59 u32 ointsize, const u32 *addr,
60 struct of_irq *out_irq);
61 extern int of_irq_map_one(struct device_node *device, int index,
62 struct of_irq *out_irq);
63 extern unsigned int irq_create_of_mapping(struct device_node *controller,
64 const u32 *intspec,
65 unsigned int intsize);
66 extern int of_irq_to_resource(struct device_node *dev, int index,
67 struct resource *r);
68 extern int of_irq_count(struct device_node *dev);
69 extern int of_irq_to_resource_table(struct device_node *dev,
70 struct resource *res, int nr_irqs);
71
72 #endif /* CONFIG_OF_IRQ */
73 #endif /* CONFIG_OF */
74 #endif /* __OF_IRQ_H */
75