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;
23extern int of_irq_parse_oldworld(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(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 int of_irq_parse_one(struct device_node *device, int index,
37 struct of_phandle_args *out_irq);
38extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
39extern int of_irq_to_resource(struct device_node *dev, int index,
40 struct resource *r);
41
42extern void of_irq_init(const struct of_device_id *matches);
43
44#ifdef CONFIG_OF_IRQ
45extern int of_irq_count(struct device_node *dev);
46extern int of_irq_get(struct device_node *dev, int index);
47extern int of_irq_get_byname(struct device_node *dev, const char *name);
48extern int of_irq_to_resource_table(struct device_node *dev,
49 struct resource *res, int nr_irqs);
50extern struct device_node *of_irq_find_parent(struct device_node *child);
51extern struct irq_domain *of_msi_get_domain(struct device *dev,
52 struct device_node *np,
53 enum irq_domain_bus_token token);
54extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
55 u32 rid);
56extern void of_msi_configure(struct device *dev, struct device_node *np);
57u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in);
58#else
59static inline int of_irq_count(struct device_node *dev)
60{
61 return 0;
62}
63static inline int of_irq_get(struct device_node *dev, int index)
64{
65 return 0;
66}
67static inline int of_irq_get_byname(struct device_node *dev, const char *name)
68{
69 return 0;
70}
71static inline int of_irq_to_resource_table(struct device_node *dev,
72 struct resource *res, int nr_irqs)
73{
74 return 0;
75}
76static inline void *of_irq_find_parent(struct device_node *child)
77{
78 return NULL;
79}
80
81static inline struct irq_domain *of_msi_get_domain(struct device *dev,
82 struct device_node *np,
83 enum irq_domain_bus_token token)
84{
85 return NULL;
86}
87static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
88 u32 rid)
89{
90 return NULL;
91}
92static inline void of_msi_configure(struct device *dev, struct device_node *np)
93{
94}
95static inline u32 of_msi_map_rid(struct device *dev,
96 struct device_node *msi_np, u32 rid_in)
97{
98 return rid_in;
99}
100#endif
101
102#if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
103/*
104 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
105 * implements it differently. However, the prototype is the same for all,
106 * so declare it here regardless of the CONFIG_OF_IRQ setting.
107 */
108extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
109
110#else /* !CONFIG_OF && !CONFIG_SPARC */
111static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
112 int index)
113{
114 return 0;
115}
116#endif /* !CONFIG_OF */
117
118#endif /* __OF_IRQ_H */
119