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
12 typedef 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)
21 extern unsigned int of_irq_workarounds;
22 extern struct device_node *of_irq_dflt_pic;
23 extern 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)
of_irq_parse_oldworld(struct device_node * device,int index,struct of_phandle_args * out_irq)28 static 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
35 extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
36 extern int of_irq_parse_one(struct device_node *device, int index,
37 struct of_phandle_args *out_irq);
38 extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
39 extern int of_irq_to_resource(struct device_node *dev, int index,
40 struct resource *r);
41
42 extern void of_irq_init(const struct of_device_id *matches);
43
44 #ifdef CONFIG_OF_IRQ
45 extern int of_irq_count(struct device_node *dev);
46 extern int of_irq_get(struct device_node *dev, int index);
47 extern int of_irq_get_byname(struct device_node *dev, const char *name);
48 extern int of_irq_to_resource_table(struct device_node *dev,
49 struct resource *res, int nr_irqs);
50 extern struct device_node *of_irq_find_parent(struct device_node *child);
51 extern struct irq_domain *of_msi_get_domain(struct device *dev,
52 struct device_node *np,
53 enum irq_domain_bus_token token);
54 extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
55 u32 id,
56 u32 bus_token);
57 extern void of_msi_configure(struct device *dev, struct device_node *np);
58 u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
59 #else
of_irq_count(struct device_node * dev)60 static inline int of_irq_count(struct device_node *dev)
61 {
62 return 0;
63 }
of_irq_get(struct device_node * dev,int index)64 static inline int of_irq_get(struct device_node *dev, int index)
65 {
66 return 0;
67 }
of_irq_get_byname(struct device_node * dev,const char * name)68 static inline int of_irq_get_byname(struct device_node *dev, const char *name)
69 {
70 return 0;
71 }
of_irq_to_resource_table(struct device_node * dev,struct resource * res,int nr_irqs)72 static inline int of_irq_to_resource_table(struct device_node *dev,
73 struct resource *res, int nr_irqs)
74 {
75 return 0;
76 }
of_irq_find_parent(struct device_node * child)77 static inline void *of_irq_find_parent(struct device_node *child)
78 {
79 return NULL;
80 }
81
of_msi_get_domain(struct device * dev,struct device_node * np,enum irq_domain_bus_token token)82 static inline struct irq_domain *of_msi_get_domain(struct device *dev,
83 struct device_node *np,
84 enum irq_domain_bus_token token)
85 {
86 return NULL;
87 }
of_msi_map_get_device_domain(struct device * dev,u32 id,u32 bus_token)88 static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
89 u32 id, u32 bus_token)
90 {
91 return NULL;
92 }
of_msi_configure(struct device * dev,struct device_node * np)93 static inline void of_msi_configure(struct device *dev, struct device_node *np)
94 {
95 }
of_msi_map_id(struct device * dev,struct device_node * msi_np,u32 id_in)96 static inline u32 of_msi_map_id(struct device *dev,
97 struct device_node *msi_np, u32 id_in)
98 {
99 return id_in;
100 }
101 #endif
102
103 #if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
104 /*
105 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
106 * implements it differently. However, the prototype is the same for all,
107 * so declare it here regardless of the CONFIG_OF_IRQ setting.
108 */
109 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
110
111 #else /* !CONFIG_OF && !CONFIG_SPARC */
irq_of_parse_and_map(struct device_node * dev,int index)112 static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
113 int index)
114 {
115 return 0;
116 }
117 #endif /* !CONFIG_OF */
118
119 #endif /* __OF_IRQ_H */
120
