1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __OF_IRQ_H
3#define __OF_IRQ_H
4
5#include <linux/types.h>
6#include <linux/errno.h>
7#include <linux/irq.h>
8#include <linux/irqdomain.h>
9#include <linux/ioport.h>
10#include <linux/of.h>
11
12typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
13
14/*
15 * Workarounds only applied to 32bit powermac machines
16 */
17#define OF_IMAP_OLDWORLD_MAC 0x00000001
18#define OF_IMAP_NO_PHANDLE 0x00000002
19
20#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
21extern unsigned int of_irq_workarounds;
22extern struct device_node *of_irq_dflt_pic;
23int of_irq_parse_oldworld(const struct device_node *device, int index,
24 struct of_phandle_args *out_irq);
25#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
26#define of_irq_workarounds (0)
27#define of_irq_dflt_pic (NULL)
28static inline int of_irq_parse_oldworld(const struct device_node *device, int index,
29 struct of_phandle_args *out_irq)
30{
31 return -EINVAL;
32}
33#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
34
35extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
36extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
37extern int of_irq_to_resource(struct device_node *dev, int index,
38 struct resource *r);
39
40#ifdef CONFIG_OF_IRQ
41extern void of_irq_init(const struct of_device_id *matches);
42extern int of_irq_parse_one(struct device_node *device, int index,
43 struct of_phandle_args *out_irq);
44extern int of_irq_count(struct device_node *dev);
45extern int of_irq_get(struct device_node *dev, int index);
46extern const struct cpumask *of_irq_get_affinity(struct device_node *dev,
47 int index);
48extern int of_irq_get_byname(struct device_node *dev, const char *name);
49extern int of_irq_to_resource_table(struct device_node *dev,
50 struct resource *res, int nr_irqs);
51extern struct device_node *of_irq_find_parent(struct device_node *child);
52extern struct irq_domain *of_msi_get_domain(struct device *dev,
53 const struct device_node *np,
54 enum irq_domain_bus_token token);
55extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
56 u32 id,
57 u32 bus_token);
58extern void of_msi_configure(struct device *dev, const struct device_node *np);
59extern u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in);
60#else
61static inline void of_irq_init(const struct of_device_id *matches)
62{
63}
64static inline int of_irq_parse_one(struct device_node *device, int index,
65 struct of_phandle_args *out_irq)
66{
67 return -EINVAL;
68}
69static inline int of_irq_count(struct device_node *dev)
70{
71 return 0;
72}
73static inline int of_irq_get(struct device_node *dev, int index)
74{
75 return 0;
76}
77static inline int of_irq_get_byname(struct device_node *dev, const char *name)
78{
79 return 0;
80}
81static inline const struct cpumask *of_irq_get_affinity(struct device_node *dev,
82 int index)
83{
84 return NULL;
85}
86static inline int of_irq_to_resource_table(struct device_node *dev,
87 struct resource *res, int nr_irqs)
88{
89 return 0;
90}
91static inline void *of_irq_find_parent(struct device_node *child)
92{
93 return NULL;
94}
95
96static inline struct irq_domain *of_msi_get_domain(struct device *dev,
97 struct device_node *np,
98 enum irq_domain_bus_token token)
99{
100 return NULL;
101}
102static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
103 u32 id, u32 bus_token)
104{
105 return NULL;
106}
107static inline void of_msi_configure(struct device *dev, struct device_node *np)
108{
109}
110static inline u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in)
111{
112 return id_in;
113}
114#endif
115
116#if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
117/*
118 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
119 * implements it differently. However, the prototype is the same for all,
120 * so declare it here regardless of the CONFIG_OF_IRQ setting.
121 */
122extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
123
124#else /* !CONFIG_OF && !CONFIG_SPARC */
125static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
126 int index)
127{
128 return 0;
129}
130#endif /* !CONFIG_OF */
131
132#endif /* __OF_IRQ_H */
133

source code of linux/include/linux/of_irq.h